阅读说明：本技术 用于膏状的物料的分配器 (Distributor for pasty materials ) 是由 S.戈特克 于 2020-04-08 设计创作，主要内容包括：本发明涉及一种用于膏状物料(M)的分配器(1),所述分配器由带有限制部件(5)的存储空间(2)和相对于所述存储空间(2)导引的头部件(4)构成,所述限制部件能够在抽吸时从所述存储空间(2)中共同运动,其中,在所述头部件(4)和所述存储空间(2)之间构造有具有进入阀(43)和排出阀(41)的输出腔室(19),其中,为所述输出腔室(19)对应配置有具有输出开口(24)的输出通道(23),并且其中,为了使所述头部件(4)在从初始位置运动到操作位置中时回弹,设置有在所述存储空间(2)和所述头部件(4)之间作用的弹簧元件(22),所述弹簧元件同时部分地构成所述输出腔室(19)的边界壁(29),并且具有下部的管状的插塞突起部(38)和上部的固持成形部,其中,在所述弹簧元件(22)与所述固持突起部(30)和所述插塞突起部(38)一体式地构造时,所述弹簧元件(22)参照所述横截面在初始位置中构造为延伸到所述插塞突起部(38)上的边脚(26),所述边脚经由向上指向的弯曲部(27)过渡到所述固持突起部中。为了在功能方面和有利的安装方面进一步改善地设计所述类型的分配器建议,所述固持成形部构造为相对于所述边脚(26)横截面更大的固持突起部(30),所述固持突起部具有上部的、位于所述固持容纳部中的突起部底座(35),所述突起部底座具有闭合的横截面。(The invention relates to a dispenser (1) for pasty materials (M), comprising a storage space (2) having a limiting member (5) which can be moved jointly from the storage space (2) during suction, and a head part (4) guided relative to the storage space (2), wherein an outlet chamber (19) having an inlet valve (43) and an outlet valve (41) is formed between the head part (4) and the storage space (2), wherein an outlet channel (23) having an outlet opening (24) is associated with the outlet chamber (19), and wherein a spring element (22) acting between the storage space (2) and the head part (4) is provided for the purpose of causing the head part (4) to spring back when moving from an initial position into an operating position, which spring element at the same time partially forms a boundary wall (29) of the outlet chamber (19), and having a lower tubular plug projection (38) and an upper retaining profile, wherein, when the spring element (22) is formed integrally with the retaining projection (30) and the plug projection (38), the spring element (22) is formed, in an initial position, with reference to the cross section, as a limb (26) extending onto the plug projection (38), which limb merges into the retaining projection via an upwardly directed bend (27). In order to further improve the design of a dispenser of this type with regard to function and advantageous installation, the holding profile is designed as a holding projection (30) having a larger cross section than the leg (26), said holding projection having an upper projection seat (35) in the holding receptacle, said projection seat having a closed cross section.)

1. A dispenser (1) for pasty materials (M), consisting of a storage space (2) with a limiting member (5) which can be moved jointly from the storage space (2) during suction and a head piece (4) guided relative to the storage space (2), wherein an outlet chamber (19) with an inlet valve (43) and an outlet valve (41) is formed between the head piece (4) and the storage space (2), wherein an outlet channel (23) with an outlet opening (24) is assigned to the outlet chamber (19) in each case, and wherein, in order to spring back the head piece (4) during movement from an initial position into an operating position, a spring element (22) is provided which acts between the storage space (2) and the head piece (4) and at the same time partially forms a boundary wall (29) of the outlet chamber (19), and, viewed in a cross-section in a view which is arranged vertically above with reference to the head piece (4) and the storage space (2) is arranged vertically below and the central longitudinal axis (x) of the dispenser (1) is taken as a line, the spring element (22) has a lower tubular plug projection (38) which is sealingly received in a fittingly shaped plug receiving portion (12) connected to the storage space (2) and an upper retaining formation which is sealingly received in a retaining receiving portion (31) of the head piece (4), and further wherein, when the spring element (22) is constructed integrally with the retaining projection (30) and the plug projection (38), the spring element (22) is constructed with reference to the cross-section as a leg (26) which extends immediately behind the plug projection (38), the leg merges into the holding projection (30) via an upwardly directed bend (27), characterized in that the holding profile is designed as an overall circular ring-shaped holding projection (30) of larger cross section relative to the leg (26), which has an upper projection seat (35) in the holding receptacle (31), which projection seat has a closed cross section.

2. Dispenser (1) according to claim 1, characterised in that the transition area (U) has a hinge-like narrowing (37).

3. Dispenser (1) according to one of the preceding claims, wherein the retaining projection (30) forms a projection foot (36) projecting perpendicularly downwards relative to a transition region (U) between the upward foot (28) and the retaining projection (30), which projection foot extends radially outwards to the upward foot (28) with reference to a longitudinal centre axis (x) of the dispenser (1) starting from the transition region (U).

4. Dispenser (1) according to one of the preceding claims, wherein the retaining receptacle (31) of the head part (4) is designed as a vertically downwardly open groove (32) for receiving the retaining projection (30).

5. Dispenser (1) according to one of the preceding claims, characterized in that the retaining projection (30) extends vertically upwards starting from the transition region (U).

6. Dispenser (1) according to one of the preceding claims, wherein the retaining projection (30) engages into a circumferential, vertically downwardly open groove (32) of the head part (4).

7. Distributor (1) according to one of the preceding claims, characterized in that the trough (32) has side walls (20, 34) of different length along the vertical direction with reference to the cross section (2).

8. Distributor (1) according to one of the preceding claims, characterized in that the side wall (20) located radially inwards with reference to the longitudinal mid-axis (x) is constructed shorter than the side wall (34) located radially outwards.

9. Dispenser (1) according to one of the preceding claims, wherein the radially outer side wall (34) projects vertically downwards beyond the projection foot (36).

10. Distributor (1) according to one of the preceding claims, characterized in that the radially inner side wall (20) ends in a transition region (U) in terms of its vertical extension.

11. Dispenser (1) according to one of the preceding claims, wherein the wall thickness (c) of the plug projection (38) measured in the radial direction corresponds to 1.5 or more times the maximum thickness (d) in the region of the horizontally extending limb (26).

12. Dispenser (1) according to one of the preceding claims, wherein the plug projection (38) has an axial length (e) starting from a lower edge (39) of the leg extending horizontally in the initial position, which is equal to or greater than an axial extension of the spring element (22) starting from the lower edge (39) of the horizontally extending leg (26) to an axially upper end of the retaining projection (30).

13. The dispenser (1) according to one of the preceding claims, wherein a valve section (40) for forming a discharge valve (41) is integrally formed on the retaining projection (30).

14. The distributor (1) according to one of the preceding claims, wherein the valve section (40) is configured on a circumferential section of the retaining projection (30) which is larger than the largest free opening dimension in the circumferential direction of the discharge opening corresponding to the outlet channel (23) adjacent to the retaining projection (30).

15. The dispenser (1) according to one of the preceding claims, wherein the valve section (40) extends over a third or more of the circumference of the holding projection (30).

16. The dispenser (1) according to one of the preceding claims, wherein the valve section (40) is circumferentially configured in a shape-invariant and closed ring shape.

17. Distributor (1) according to one of the preceding claims, characterized in that a groove (46) for accommodating a valve section (40) is formed in the head part (4) in the circumferential direction outside the outlet channel (23).

18. Dispenser (1) according to one of the preceding claims, wherein the retaining projection (30) cooperates with a lip section (53) of the head part (4) to constitute a discharge valve (41).

19. Dispenser (1) according to one of the preceding claims, wherein the lip section (53) extends free-projectedly towards the radial outside, starting from a radially inner holding region (56), with reference to a cross section.

20. The dispenser (1) according to one of the preceding claims, characterized in that the lip section (53) is configured to extend substantially horizontally in cross section.

21. The dispenser (1) according to one of the preceding claims, wherein the lip section (53) interacts with a vertically upwardly free support surface (51) of the holding projection (30).

22. The dispenser (1) according to one of the preceding claims, characterized in that an annular projection (52) is formed on the support surface (51), on which projection the lip section (53) rests in a sealing manner.

23. The dispenser (1) according to one of the preceding claims, characterized in that the lip section (53) is configured on a plug (54) arranged in the head piece (4).

24. The dispenser (1) according to one of the preceding claims, characterized in that the lip section (53) transitions radially inwardly into a surrounding, annular section (57) which projects vertically downwards with reference to the cross section out of the lip section (53).

25. The dispenser (1) according to one of the preceding claims, characterized in that the lip section (53) and/or the plug (54) consist of hard plastic.

26. The dispenser (1) according to one of the preceding claims, characterized in that the horizontally extending leg (26) is further constructed in one piece with the inlet valve (43).

27. Dispenser (1) according to one of the preceding claims, wherein the head (4) is guided in a stop-limited manner on a mounting (10) facing the storage space (2).

28. Dispenser (1) according to one of the preceding claims, wherein the guide and stop definition correspond to different components of the head part (4) and the mounting part (10).

29. The dispenser (1) according to one of the preceding claims, characterized in that the mounting (10) has a first column section (59) which cooperates with a second column section (60) of the head (4) for guidance.

30. Dispenser (1) according to one of the preceding claims, wherein the mounting (10) further has a third column section (61) for latching with the storage space (2), which third column section cooperates with a fourth column section (62) of the head part (10) for stop limitation.

31. A dispenser (1) characterised by the features of one or more of the characterising parts of any of the preceding claims.

Technical Field

The invention relates to a dispenser for pasty materials, comprising a storage space with a limiting element that can be moved jointly from the storage space during suction, and a head element guided relative to the storage space, wherein an outlet chamber with an inlet valve and an outlet valve is formed between the head element and the storage space, wherein an outlet channel with an outlet opening is assigned to the outlet chamber, and wherein, in order to cause the head element to spring back when moving from an initial position into an operating position, a spring element is provided that acts between the storage space and the head element, which spring element at the same time partially forms a boundary wall of the outlet chamber and, viewed in cross section in a view in which the reference head element is arranged vertically above and the storage space is arranged vertically below, and the central longitudinal axis of the dispenser is represented by a line, the spring element has a lower tubular plug projection which is sealingly received in a fittingly shaped plug receptacle connected to the storage space, and an upper retaining formation which is sealingly received in a retaining receptacle of the head piece, wherein the spring element, when the spring element is formed integrally with the retaining projection and the plug projection, is formed with reference to the cross section in an initial position as a limb which extends immediately behind the plug projection, the limb transitioning into the retaining projection via an upwardly directed bend.

Prior Art

A dispenser of the generic type is used in particular for portioned dispensing of pasty substances, for example, also for dispensing creams, such as creams or toothpaste, for example, wherein a co-operating limiting element, such as a limiting element in the form of a follower piston, can be arranged in a storage space in which the substance is stored. The material is discharged in portions by a pumping movement of the head member relative to the storage space. For this purpose, reference is made to, for example, patent document EP 2747893B 1(US 9,096,362B 2). From this patent document, a dispenser of the type described is known in which a spring element arranged between a head piece and a storage space is compressed by the head piece being lowered by a user to dispense material. When the pressure load exerted by the user on the head part is removed, the head part moves back into the initial position due to the restoring force previously formed by the spring. The spring element here has a U-shaped section in the initial position and in the operating position with reference to the vertical section or with reference to the view in which the head part is arranged vertically above and the storage space is arranged vertically below, said U-shaped section extending freely between the storage space and the surrounding wall of the head part. Such dispensers are also known, for example, from patent document US 7,819,290B 2.

Such a dispenser is known from EP 2164645B 1, in which the spring element is bellows-shaped and in which a lip section is formed on the head side, which lip section forms a discharge valve in cooperation with the spring element.

Disclosure of Invention

Starting from this prior art, the technical problem addressed by the present invention is that of designing a dispenser of this type further improved in terms of functionality and in terms of ease of installation.

A possible solution to this problem is provided according to the first inventive concept in a dispenser in which the holding profile is designed as an overall circular ring-shaped holding projection with a larger cross section than the leg, said holding projection having an upper projection base with a closed complete cross section in the holding receptacle.

Due to the proposed design of the spring element, an advantageous mounting of the spring element in the plug receptacle on the storage space side and/or an advantageous mounting of the head part on the spring element in the region of the retaining receptacle can be produced. Due to the increased cross section of the retaining projection, in particular of the projection base, which is preferably designed in a solid manner in cross section, relative to the legs which essentially form the spring properties of the spring element as a whole, a stable and preferably positionally reliable arrangement of the retaining projection in the retaining recess can be achieved even in normal use of the dispenser. Furthermore, a reliable seal can thereby be achieved between the retaining projection and the retaining recess.

The cross-sectional dimension of the holding projection can here correspond, for example, to 1.5 to 5 times, further for example 2 to 3 times, the cross-sectional dimension of the leg, viewed in the same vertical sectional plane.

This can also produce an aid to the self-positioning (Selbstfindung) of the retaining projection on the spring element side in the retaining receptacle on the head part side and/or to the self-positioning of the plug projection on the spring element side in the plug receptacle of the storage space during the mounting process. This is achieved if necessary by virtue of the high base stability of the spring element which can be achieved on account of the spring element being able to be oriented in a substantially horizontally disposed leg in the initial position, which also corresponds to the installation position, so that an easier installation is achieved.

Furthermore, based on the proposed design, in particular the cross-sectional shape of the spring element, a shape can be produced which is generally disk-shaped and is provided with a circumferential edge which is oriented perpendicularly in the cross-section. This may also result in improved operability of the dispenser, in particular an improved feel during operation. The selected cross-sectional shape of the spring element can produce a perceptible, quasi-defined pressure point for the user, which must be overcome in order to move the head part from the initial position into the operating position. A distributor with a relatively small installation space in the region of the head part can also be realized by the proposed design. The plug projection can transition here via a radially outwardly directed curvature, preferably a curvature of, for example, about 90 °, into a substantially horizontally extending leg, which in turn enters radially outwardly via an upwardly directed curvature, preferably a curvature of, for example, about 90 °, into an upwardly directed leg.

The spring element can be formed according to a preferred embodiment from a rubber-like, resilient plastic, for example from a resilient elastomer, in particular from a silicone material. The material provides sufficient restoring capacity for elastically moving the head part back from the operating position into the initial position. The spring element can be produced here as a plastic injection-molded part.

Further features of the invention are also explained below with the aid of the drawing description, in general, in their preferred configuration with respect to the solution of claim 1 or the features of the other claims. Further features may also be of significance only in the form of the arrangement of the individual features of claim 1 or of the respective other claims or independently of each other.

According to a further embodiment, the upward leg can merge into the holding projection via a hinge-like constriction. The constriction can be produced by forming a region which is designed thinner than the region to which it is connected, i.e. for example an upward leg or a transition region. This makes it possible to produce a material constriction which can provide the hinge action between the upward leg and the transition region. In this case, a material thickness can be produced in the region of the hinge-like constriction, which material thickness can correspond to approximately 0.3 to 0.8 times, for example approximately 0.5 times, the thickness of the connected spring element region, for example the transition region and/or the upward leg.

The retaining projection can form a projection limb which projects perpendicularly downward relative to a transition region between the upward limb and the retaining projection, said projection limb extending radially outward toward the upward limb with reference to a vertical longitudinal center axis of the distributor, starting from the transition region. The projection limb can here be accommodated in a holding receptacle of the head part, if necessary together with the holding projection, for holding purposes. The projection limb can in this case interact with the retaining receptacle according to a possible embodiment in the region of the radially outer circumferential surface in a friction-fit and/or form-fit manner.

The retaining receptacle of the head part can be designed in a possible embodiment as a vertically downwardly open groove for receiving the retaining lug and, if necessary, for receiving the other lug limb. The groove can be substantially U-shaped in cross section according to the opening paragraph, with a vertically downwardly directed U-shaped opening, through which the retaining projection of the spring element is in particular recessed into the retaining receptacle.

The holding receptacle can also have a groove base which closes the holding receptacle vertically upwards in a top-hat manner. The groove base is a U-shaped web which connects the U-shaped legs which extend substantially parallel to one another in cross section, in the substantially U-shaped design of the groove or of the holding receptacle.

Starting from the transition region, the holding projection can extend vertically upwards. The hinge-like constriction can accordingly be provided in the transition from the holding projection to the projection foot according to a possible embodiment. In a further embodiment of the holding projection, the holding projection itself, viewed in the radial direction, can have a greater extent than the projection limb in the same direction. The radial thickness of the holding projection associated therewith may correspond to about 1.5 to about 2 times the radial thickness of the projection foot.

The retaining projection can also engage into a circumferential groove which opens vertically downwards.

In a further embodiment, the projection foot and the holding projection can together form a circumferential outer wall of the spring element, which outer wall is intended to interact with the groove inner surface of the holding receptacle.

The groove can have two side walls of almost the same length in the vertical direction, with reference to the cross section. In connection therewith it is preferably designed with side walls of different lengths in the vertical direction. The radially outer side wall can in this case in a possible embodiment have a shorter extension vertically downwards starting from the groove base or the U-shaped connecting strip than the radially inner side wall. In a preferred embodiment, however, the side wall lying radially on the inside with reference to the center axis is shorter than the side wall lying radially on the outside. The vertical extent of the longer side walls starting from the groove base can correspond to about 1.5 to about 2.5 times, in particular about 2 times, the vertical extent of the shorter side walls.

According to another possible embodiment, the radially outer side wall can project vertically downward beyond the lug limb. The projection limb can in each case rest, in particular in terms of its radially outer circumferential surface, if necessary completely against the inner side of the radially outer side wall facing away.

The radially inner side wall can terminate in the transition region in terms of its vertical extent according to one possible embodiment. The hinge-like constriction is preferably free in this embodiment of the radially inner side wall. In particular, the radially inner side wall preferably does not hinder the mobility in the region of the hinge-like constriction.

In one possible embodiment, the wall thickness of the plug projection, measured in the radial direction, which interacts with the plug receptacle of the storage space can correspond to about 1.5 times or more the maximum thickness of the spring element in the region of the horizontally running limb. Further, the wall thickness of the plug projection in the radial direction may correspond to about 2 to about 3 times the maximum thickness measured in the vertical direction in the region of the leg in the initial position.

The plug projection may also have an axial length starting from the lower edge of the leg extending horizontally in the initial position, which is equal to or greater than the axial extent of the spring element starting from the lower edge of the leg extending horizontally to the axial upper end of the retaining projection. The plug projection may have an axial length which may correspond to about 1.0 to 2 times, further for example about 1.1 to 1.5 times, the axial extension of the spring element.

Furthermore, a valve section for forming the outlet valve can be integrally formed on the holding projection. The valve section can project here, for example, in a flap-like manner freely beyond the end of the vertical upper part of the retaining projection in order to close off the outlet opening of the outlet chamber, which connects the outlet chamber with the outlet channel. The valve section is deflected in a flap-like manner from its sealing position by lowering the head part and therewith raising the pressure in the outlet chamber, in order to open the outlet opening. At the end of the lowering movement of the head part, when the pressure load is reduced, the valve section returns into the sealing position due to its elastic restoring capacity.

In a further possible embodiment, the valve section can also be formed on a circumferential section of the retaining projection which is larger than the largest free opening dimension in the circumferential direction of the outlet opening corresponding to the outlet channel adjacent to the retaining projection. The valve section can accordingly be designed larger in the circumferential direction in this embodiment than is necessary for the valve to interact with the outlet channel. This provides, inter alia, advantages in terms of mounting technology. The excess width of the valve section, which is preferably formed in the circumferential direction, does not require precise orientation during the installation of the dispenser part having the retaining projection with the valve section. Rather, it is sufficient in this case that the distributor part associated therewith is arranged relative to the outlet channel in such a way that the parts of the valve section can interact in a valve-like manner with the outlet channel or the outlet opening.

The valve section may extend, for example, over a circumference or a circumferential one-third or greater portion of the retaining projection, further for example over half or more, not more than three-quarters or two-thirds or more of said circumference.

According to a preferred embodiment, the valve section can be embodied in a form-stable and closed annular manner. This enables the dispenser part with the valve section to be freely oriented during installation.

The head part of the distributor with the retaining projection can in this case form a groove outside the outlet channel in the circumferential direction, in particular for accommodating the valve section. The valve section, which is preferably surrounded in a form-retaining and closed annular manner, extends from the outlet channel on both sides in the circumferential direction and is accommodated outside the outlet channel in the groove-like receptacle.

In another possible embodiment, the retaining projection can interact directly or indirectly with the lip section of the head part to form the outlet valve. The lip section may be a head component designed to be able to deflect, e.g. deflect, under pressure loads. The lip section can be designed to be elastically resilient based on the respective material selection and/or material thickness.

The lip portion can extend in a freely projecting manner in the radial direction towards the outside, starting from the radially inner holding region with reference to the cross section. The lip portion can here be designed as a freely projecting flat part, if necessary also in the form of a flat part of constant shape and in the form of a closed ring.

According to a preferred embodiment, the lip section can be designed to extend substantially horizontally in cross section. Such a horizontal orientation can be produced in particular in the pre-installed state. In one possible embodiment, the lip section can also have an orientation oriented along a horizontal plane in the valve-closed position, for example with an acute angle of a few degrees, for example 1 ° to 5 °, further for example 2 ° to 3 °, in order to interact with the retaining projection to form the outlet valve.

In the open valve position, the acute angle associated therewith with respect to a horizontal plane extending transversely to the longitudinal center axis of the distributor can be enlarged. It is thus possible to form an acute angle of, for example, not more than 10 ° or not more than 20 ° in the valve-open position.

The lip portion can interact with a vertically upwardly free bearing surface of the holding projection. In connection therewith, a direct interaction between the bearing surface of the holding projection and the surface of the facing lip section can be produced.

In a further preferred embodiment, an annular projection can be formed on the end face, on which projection the lip section rests in the valve-closed position in a sealing manner, so that a point support of the lip section can be formed in cross section.

The valve can preferably be formed by the lip section abutting against the head part or an annular projection of the head part over the entire circumference of the retaining projection. The lip section can accordingly be lifted at least partially, as viewed in the circumferential direction, from the retaining projection or the annular projection of the retaining projection by exceeding the pressure load in the outlet chamber, in order to thereby achieve partial discharge of the material from the outlet chamber into the outlet channel. The lip portion can also be raised from the holding projection or the annular projection in a uniformly or non-uniformly distributed manner at several positions in the circumferential direction, but can also be spaced apart uniformly or non-uniformly vertically from the sealing seat over the entire circumference.

The lip portion can be formed on a plug arranged in the head part. The plug may first exist as a movable part during installation. Furthermore, such a plug, and preferably other components of the dispenser, may be manufactured in a plastic injection molding process.

In a further embodiment, the lip portion can merge radially inwardly into a circumferential annular portion which projects perpendicularly downward with reference to the cross section and protrudes beyond the lip portion. Such an annular section may be adapted to reduce the volume of the output chamber in a state in which the head is depressed. Such a ring section can further, for example, be sunk into a U-shaped section of the limb of the spring element which extends substantially perpendicularly in the unloaded position and which is produced in the depressed state of the head part and substantially fills the groove-like space produced.

The lip section or the plug with the lip section can be made of hard plastic. For example, PE or TPE can be used in connection therewith, and, if necessary, other dispenser parts, preferably in addition to the spring element, are also involved.

The horizontally extending limb can be formed in one piece with the inlet valve in other embodiments. The inlet valve can likewise interact here in a flap-like manner, preferably however, for example, in a plug-like manner with a corresponding inlet opening between the storage space and the outlet chamber.

According to a further preferred embodiment, an integrated and material-consistent design of the spring element with the inlet and outlet valves and the retaining projection, the projection foot and the plug projection can be produced.

The head part can be guided in a defined manner over the mounting part or insertion part facing the storage space. The stop limits the head part base position preferably relating to an inoperative distributor and/or the head part lowering position for the discharge of material. The guide and/or the stop limitation can preferably be produced by a partial region, which is optionally formed directly on the head part and/or the mounting part.

Furthermore, according to a preferred embodiment, the guide and the stop limitation can correspond to different components associated with the head part and the mounting part. The components of the head and of the mounting can preferably be used only for guiding the head on the mounting and the other components of the head and of the mounting are preferably limited only for stops. This can result in advantages, in particular with regard to the production of the dispenser, and further in particular with regard to the mounting of the head part on the mounting part. The guidance in the axial direction can thus already be achieved by locally separating the guide and the stop limiting portion, for example during installation, before the components for stop limiting are installed into the position in which they act upon one another.

In one possible embodiment, the mounting can accordingly have a first column section which interacts with a second column section of the head part for guidance. In this case, cylindrical column sections, which are furthermore preferably oriented concentrically to one another, may preferably be provided, wherein the first column section of the mounting part, for example, may be arranged radially inward with respect to the second column section of the head part, with reference to the longitudinal center axis of the distributor. The opposite arrangement in relation thereto is also possible.

The mounting part can have a third column section for latching with the space, which can also interact with a fourth column section of the head part for the purpose of stop limitation. The fourth column section of the head piece can also be arranged here, for example, radially inward with reference to the longitudinal center axis of the distributor and the third column section of the mounting piece is correspondingly arranged radially outward with respect to the fourth column section of the head piece. The opposite arrangement in relation thereto is also possible here.

The third and fourth column sections of the mounting part and the head part for limiting the stop can be arranged radially outside the first and second column sections for guiding according to a preferred embodiment. A reverse arrangement is also possible here, so that the stop limiting section can be arranged radially inward with respect to the guide section.

The head part can be guided in a defined manner in a stop on the mounting part facing the storage space. The stop limitation preferably relates to the head part base position.

The range or range of values or ranges specified above and below in relation to the present disclosure also includes the middle of all intermediate values, especially the 1/10 step values for the respective dimension, which may also be dimensionless. For example, a 1.1 to 1.5 fold specification also includes disclosure of 1.2 to 1.5 fold, 1.1 to 1.4 fold, 1.2 to 1.4 fold, etc. The disclosure is used in one aspect to define the lower and/or upper limits of the ranges, but may alternatively or additionally be used to disclose one or more individual values for each given range.

Drawings

The invention is elucidated below on the basis of the accompanying drawings, which, however, only show embodiments. Components which are described only in relation to one of these embodiments and which are not replaced in the further embodiments by other different components due to the features highlighted there are also described as at least possible components for this further embodiment. In the drawings:

fig. 1 shows, in vertical section, a dispenser of the type in question with a delimiting part in the form of a follower piston which can move jointly in a storage space;

fig. 2 shows a view corresponding to fig. 1, wherein the co-movable delimiting parts are formed by compressible pockets which further also form a storage space;

FIG. 3 shows an enlarged view of region III of FIG. 1 after removal of the hiding cover;

FIG. 4 shows an enlarged view of region IV in FIG. 3;

fig. 5 shows a view corresponding to fig. 3, however after the head has been moved from the initial position according to fig. 3 into the operating position;

fig. 6 shows in a perspective, isolated view a spring element arranged between the storage space and the head member;

FIG. 7 shows the spring element in another perspective view;

fig. 8 shows a sectional view, which substantially corresponds to fig. 3, and which relates to a second embodiment;

fig. 9 shows the embodiment according to fig. 8 after the head part has been moved into the operating position;

fig. 10 shows a further sectional view corresponding to fig. 3, which relates to a third embodiment;

FIG. 11 shows an enlarged view of region XI in FIG. 10;

fig. 12 shows the embodiment according to fig. 10 in the operating position;

fig. 13 shows the view according to fig. 1, but in relation to the fourth embodiment in the initial position;

FIG. 14 shows an enlarged view of region XIV in FIG. 13;

fig. 15 shows the embodiment according to fig. 13 in the operating position;

FIG. 16 shows a fourth embodiment of a spring element in a perspective, isolated view;

fig. 17 shows a spring element of a fourth embodiment in a perspective sectional view;

fig. 18 shows a further view corresponding to fig. 1, which relates to the fifth embodiment in the initial position;

FIG. 19 shows an enlarged view of region XIX in FIG. 18;

fig. 20 shows the embodiment according to fig. 18 in the operating position;

FIG. 21 shows a spring element of a fifth embodiment in perspective, isolated view;

fig. 22 shows a spring element of a fifth embodiment in a perspective sectional view;

fig. 23 shows a spring element in a perspective view, which relates to the sixth embodiment.

Detailed Description

First, a dispenser 1, in particular for dispensing pasty material M, is shown and described with reference to fig. 1 and 2.

The dispenser 1 is essentially composed of a material store 3 defining a storage space 2 and a head member 4 that is movable relative to the material store 3.

In the preferred and illustrated embodiment, the distributor 1 is designed rotationally symmetrically with a central axis x.

The head part 4 is preferably movable along the central axis x relative to the material store 3 or the storage space 2.

As further shown in the exemplary embodiments according to fig. 1 to 7, a co-movable delimiting part 5 in the form of a follower piston 6 can be arranged in the storage space 2. The delimiting part 5 may alternatively also be formed, according to the view in fig. 2, by a compressible pocket 7 which at the same time forms the storage space 2.

In the rest position of the dispenser 1 according to the views in fig. 1 and 2, the head part 4 is preferably enclosed by a closure cap 8. The closure can have an outer diameter corresponding to the outer diameter of the material reservoir 3.

The material store 3 can have a housing bottom 9. The opening of the material storage 3, which is directed vertically upward in the drawing, is covered by a mounting 10, which in the normal operating state of the dispenser 1 is connected, in particular latched, to the material storage 3 in a non-releasable, at least tool-free manner.

The material M is stored in a storage space 2, which is defined by the follower piston 6 and the mounting 10 and by the surrounding wall of the material reservoir 3 according to the embodiment shown in fig. 1. In the arrangement of the pockets 7 according to the view of fig. 2, the material M is contained in a storage space 2 which is delimited by the pockets 7 from the bottom side and the circumferential side and above by the mounting 10.

The mounting element 10 can form a plug receptacle 12 in the center, starting from the conical region 11, which extends substantially into the opening plane E of the material reservoir 3. As shown, this plug receptacle may first have a central, pot-shaped projection which surrounds concentrically relative to the center axis x, and which has a surrounding pot wall 13 and a pot top 14 which is connected along the upper edge of the pot wall 13 and is oriented transversely to the center axis x. The bowl top 14 can preferably be passed centrally through the access opening 15.

The receptacle wall 16 surrounding the basin wall 13 extends concentrically with respect to the basin wall 13 and at a radial distance therefrom. The vertically upwardly directed circumferential end face of the receptacle wall extends at least almost in the plane formed by the upwardly directed surface of the pot top 14.

The mounting 10 formed in this way can be locked on the material container 3, in particular in the region of the opening edge of the material container 3.

Furthermore, the mounting element 10 can be designed for the snap-in fastening of the closure cap 8, wherein the mounting element 10 can have a circumferential vertical flange 17 which projects beyond the opening plane E of the material reservoir 3 and can interact with a circumferential lower edge region of the closure cap 8 in the cap-closed position.

The vertical flange 17 may also be used to guide the head piece 4 in the vertical direction. For this purpose, the vertical flange 17 can interact with the outer wall of an annular wall section 18, which is oriented perpendicularly to the reference view of the head 4.

On the basis of the aforementioned guides, the head part 4 can be moved in the vertical direction along the central axis x relative to the storage space 2 by means of the respective guide, wherein the vertical movement is limited by a stop both vertically downwards and vertically upwards, respectively.

Between the storage space 2 and the head part 4, a discharge chamber 19 for discharging the material M in portions is provided. In particular, in the initial position according to fig. 1 to 4, the outlet chamber extends substantially above the plug receptacle 12 of the mounting part 10.

The outlet chamber 19 is delimited, circumferentially with respect to the center axis, at least in a vertical subsection by a radially inner side wall 20 of the head piece 4, and on the top side by a top section 21, which is formed integrally and in material-matched fashion with the head piece 4, like the side wall 20.

The further, peripheral limiting portions which are connected to the side walls 20 substantially vertically downwards and the limiting portions of the lower part of the outlet chamber 19 in the vertical direction are formed by spring elements 22.

The head part 4 also has an outlet channel 23 with an outlet opening 24. The outlet channel 23 can be connected to the outlet chamber 19 via an outlet opening 25 formed in the side wall 20. During the pumping movement of the head part 4 along the central axis x in the direction of the storage space 2 to reduce the volume of the outlet chamber 19, the material held in portions in the outlet chamber 19 is discharged through the discharge opening 25 and the outlet channel 23.

The spring element 22 can preferably be an injection-molded part made of a thermoplastic elastomer, optionally silicone, while the other components of the dispenser 1 are preferably made of polypropylene and/or polyethylene. The dispenser 1 is preferably completely reproducible on account of this design.

The spring element 22 is first of all shaped like a disk, with reference to the unloaded position, i.e. furthermore, preferably in a position corresponding to the starting position of fig. 1 to 4, having a disk base which, in the starting position, forms a limb 26 which extends substantially horizontally in vertical section as shown. In the region of its radially outer end, this horizontally oriented leg 26 preferably merges in a material-consistent and integral manner into a vertically upwardly pointing curvature 27 in the reference view, which further merges into an at least approximately vertically oriented upward leg 28. The upward limb 28 accordingly forms a further boundary wall 29 for the outlet chamber 19, which is peripheral with respect to the center axis x.

The upward leg 28 merges into a holding projection 30 in the region of the vertically upper section remote from the bend 27. In this case, a section of substantially approximately rectangular or square design in vertical section in the drawing, which runs annularly around the axis X, is accommodated in the retaining receptacle 31 on the head part side.

The holding receptacle 31 can be designed as shown in the form of a circumferential, vertically downwardly open groove 32 with a groove top 33 formed by a U-shaped web and two side walls which form the respective U-shaped legs and which extend preferably parallel to one another in vertical section, wherein the radially inner side walls of the groove 32 can be formed by the aforementioned side walls 20. The radially outer side wall 34 likewise extends around the center axis x at a radial distance from the side wall 20.

The holding projection 30 can preferably be arranged in the groove 32 or the holding receptacle 31 in a form-fitting and/or friction-fitting manner. The projection base 35, which is rectangular in cross section, can rest on the radially inner side on the inner side wall 20 and on the radially outer side on the side wall 34, and also optionally on the groove top 33 via a vertically upward-pointing end face.

Furthermore, a vertically downwardly projecting lug limb 36, which can likewise be supported on the surface of the radially outer side wall 34 facing away, can be integrally formed integrally and integrally on the lug base 35.

The radially outer side wall 34 can extend vertically downward to such an extent that it projects beyond the projection leg 36. Furthermore, the vertical extent a of the radially outer side wall 34 starting from the groove roof 33 can correspond to approximately 1.5 to 2.5 times, in particular approximately 2 times, the vertical extent b of the radially inner side wall 20.

The substantially disk-shaped section of the spring element 22 in the initial position is connected to the holding projection 30 by a hinge-like constriction 37 formed between the upward limb 28 and the holding projection 30. The hinge-like constriction 37 is formed by a material weakness with respect to the region of the two sides which are connected. The material thickness in the region of the constriction 37 may substantially correspond to 0.3 to 0.7 times, for example 0.5 times, the thickness d in the region of the upward limb 28 and/or the bend 27 and/or the limb 26.

The narrowing 37 can be positioned in relation to the arrangement on the holding projection 30 in such a way that, starting from the narrowing 37, the projection base 35 extends vertically upwards and the projection leg 36 extends vertically downwards, wherein the projection leg 36 can also extend radially outwards and at a radial distance from the upward leg 28.

Furthermore, the radially inner side wall 20 of the head part 4 can be dimensioned with respect to its vertical extent b such that it ends in the region of the constriction 37 or above the constriction 37.

The annular plug projection 38 projects vertically downward starting from the leg 26, which essentially forms the floor of the spring element 22 and extends horizontally in vertical section. Which is engagingly clamped into the groove-like plug receptacle 12 and correspondingly between the basin wall 13 and the receptacle wall 16.

The plug projection 38 may have a wall thickness c measured in the radial direction, for example, with reference to the vertical section according to fig. 3, which may correspond to 1.5 to 2.5 times, further approximately 2 times, the maximum thickness d in the region of the horizontally extending limb 26 and/or the bend 27 and/or the upward limb 28.

Furthermore, the plug projection 38 can have an axial length e starting from the lower edge 39 of the leg 26, which extends horizontally in the initial position, which length e, according to the exemplary embodiment shown, can approximately correspond to the length f of the spring element 22 between the lower edge 39 and the axially upper end of the retaining projection 30.

Both the retaining projection 30 and the plug projection 38 can preferably be constructed in one piece and material-consistently with the disk-shaped spring element section. Furthermore, the valve section for forming the outlet valve 41 and the valve plug 42 for forming the inlet valve 43 can also be provided in one piece and in material-matched fashion.

The valve section 40 can be shaped like a lobe on the retaining projection 30 in the region of the axially upper end thereof. The valve section 40 enters the outlet channel 23 through a provided opening 44 and lies sealingly in front of the outlet opening 25 in the valve closed position (see in particular fig. 3).

The valve plug 42 is connected via a connecting strip 45 to the region of the leg 26 which extends horizontally in the initial position and closes the inlet opening 15 in the initial position according to fig. 3 in a valve-like manner.

The mounting of the head part 4 and the spring element 22 can be achieved in that, according to one possible embodiment, the spring element 22 is first inserted onto the mounting part 10 by inserting the plug projection 38 into the plug receptacle 12, and then the head part 4 is installed by introducing the retaining projection 30 into the retaining receptacle 31 and the valve section 40 into the outlet channel 23 via the opening 44. Alternatively, however, it is also possible to initially hold the spring element 22 on the head part 4 by correspondingly inserting the holding projection 30 into the holding receptacle 31, and then to mount the head part 4 provided with the spring element 22 on the material container 3 by inserting the plug projection 38 into the plug receptacle 12 of the mounting part 10.

In both cases, the assistance of self-positioning during the installation process is advantageously produced here. The spring element 22 has a rigidity in its unloaded initial position which is advantageous for the mounting.

Furthermore, the spring element 22 can be in the initial position according to fig. 3 in a pressure-release position or a position which corresponds approximately to the pressure-release position. This results in a permanently good spring characteristic of the spring element 22, which also gives the user a good feel when the head part 4 is lowered during operation of the dispenser.

The material output is produced by a lowering movement of the head part along the central axis x in the direction of the material container 3 (see fig. 5). During this lowering, a pressure increase is achieved by the volume reduction of the outlet chamber 19. This causes the valve section 40 forming the discharge valve 41 to lift to open the discharge opening 25. The material M stored in the output chamber 19 is (at least partially) output through the output channel 23.

In this lowering movement and due to the resulting pressure load, the valve plug 42 forming the inlet valve 43 is pressed sealingly into the region of the inlet opening 15.

A spring return force is built up in the spring element 22 during this lowering movement of the head part 4. This can be achieved, as shown in fig. 5, by pivoting the leg 26, which extends substantially horizontally in the initial position, downward about a temporary bending axis which is produced in the region of the bearing of the leg on the free end face of the receptacle wall 16, so that a substantially approximately U-shaped region is produced in vertical section by the leg 26, the bend 27 and the upward leg 28 in the lowered head position and thus in the tensioned position of the spring element 22, which region extends, in particular in the operating position according to fig. 5, substantially below the bearing surface of the receptacle wall 16 for the leg 26.

The automatic return from this operating position according to fig. 5 is produced by the removal of the pressure load exerted on the head part 4, in particular by the return of the leg 26 toward its horizontal basic orientation. The resulting negative pressure loading in the outlet chamber 19 assists on the one hand the sealing of the valve section 40 relative to the outlet opening 25 and the lifting of the auxiliary valve plug 42 from the inlet opening 15 (see the dashed-dotted view in fig. 3), so that the material M is additionally sucked into the outlet chamber 19 through the inlet opening 15 by the return movement of the head part 4 into the initial position.

The flap-shaped valve section 40 extends in the first exemplary embodiment shown in fig. 1 to 7 only in the outlet channel 23 and accordingly, viewed in the circumferential direction, has a circumferential length which is preferably smaller than the inner diameter of the outlet channel 23, so that according to the second exemplary embodiment shown in fig. 8 and 9, a valve section 40 is produced which also forms a lip (auslipped) essentially vertically upward here, which is formed on the upper side of the retaining projection 30 in a shape-invariant and closed-loop manner, with reference to the longitudinal center axis x.

In order to accommodate the spring element 22 thus designed completely and in order to insert it into the head piece 4, preferably in an undirected manner, the head piece 3 is provided with a groove 46 for accommodating the valve section 40, which groove extends circumferentially beyond the outlet channel 23, as viewed in the circumferential direction. From the cross-sectional view, the valve section 40 can project completely into this groove 46. Furthermore, the groove 46 can be designed to be additionally provided with a radial dimension which is able to prevent a corresponding displacement of the valve section 40 outside the discharge channel 23 during the discharge of material.

The groove 46 can also preferably be designed as a vertical extension of the holding receptacle 31, with a possibly reduced cross section.

In accordance with the above-described embodiment, the channel walls which circumscribe the outlet channel 23 are provided with slot-like passages on both sides of the outlet channel 23 in the circumferential direction, which passages are preferably completely sealed by the valve sections 40 which pass through these passages.

During the downward movement of the head part 4 for discharging the material and the consequent pressure increase in the discharge chamber 19, a flap-like deflection movement of the valve section 40 is preferably only produced as described in the region in which the discharge opening 25 is covered in a valve-like manner in the discharge channel 23 (see fig. 9).

Furthermore, according to the exemplary embodiment shown in fig. 8 and 9, the projection leg 36 of the holding projection 30 can project vertically downward beyond the radially outer side wall 34 and can support the radially outer side wall 34, as a result of which a further advantageous holding of the spring element 22 on the head part 4 can be achieved. Furthermore, an axial support of the head part via the radially outer side wall 34 on the base section 47 connected to the projecting limb 36 can be produced.

Furthermore, as is also provided in the third exemplary embodiment described below, the mounting 20 can have a rib 48, which is integrally formed, in particular for stabilizing the mounting 10, pointing in the direction of the head part 4 and encircling with respect to the receptacle wall 16. It is also clear from the illustration that the classes 48 can be arranged uniformly distributed in the circumferential direction.

The head 4 may also have a rib 49 which is formed on the underside of the actuating surface 50 of the head section 21 and is directed toward the interior of the outlet chamber 19. The ribs 49 can also preferably be formed integrally and in material consistency with the head part 4, which is further preferred if a plurality of ribs 49 are distributed uniformly around the longitudinal center axis x.

The circumferential valve section 40 of the embodiment of fig. 8 and 9 can also be inserted radially outwardly in the normal position of use, in particular in the valve closed position according to fig. 8, from a substantially vertical orientation in the unaffected, pre-installed state, by a few degrees, for example 1 ° to 3 °, onto a sealing seat in the groove 46 or in the outlet channel 23 with elastic deformation. A corresponding pretension of the valve section 40 toward the sealing position is produced.

Fig. 10 to 12 show a further embodiment in which the retaining projection 30 of the spring element 22 is retained on the head part 4, in particular by abutting radially outward against a side wall 34 of the storage space 2. The holding receptacle 31 is formed here essentially by a side wall 34. In the use position according to fig. 10 to 12, the retaining projection 30 is inserted into the retaining receptacle 31 by resting against the surface of the facing side wall 34 in a form-fitting and friction-fitting manner, wherein the lower base section 47 of the projection limb 36, which is also provided here, can also support the side wall 34.

The holding projection 30 can have a support surface 51 which is open vertically upwards. The support surface can be oriented substantially in a plane transverse to the longitudinal mid-axis x, as viewed in the drawing.

In particular, due to the integral and material-compatible design of the holding projection 30, in particular of the spring element 22, an annular projection 52, which is flange-shaped in cross section and generally concentric with respect to the longitudinal center axis, can be formed on the support surface 51.

The annular projection is preferably intended to cooperate with the lip section 53 of the head part 4 to form the outlet valve 41.

The lip portion 53 is designed here essentially as a flat piece which extends essentially horizontally, in particular in the unloaded, pre-installed position. The lip portion 53 can be formed in one piece and material-uniformly on a plug part 54 arranged on the head part 4. The plug 54 can interact here in a latching manner on the radial inside with the radial inside side wall 20.

The lip portion 53 can also extend at a vertical distance from the vertical lower end of the side wall 20, starting from a radially inner holding region 56, freely protruding radially outward on a circumferential plug wall 55 interacting with the radially inner side wall 20. In the region of the radially outer free end region, the vertically downwardly directed face of the lip section 53 interacts sealingly with the projection 52. In the closed valve position according to fig. 10, the lip portion 53 can enclose an acute angle of a few degrees, for example 2 ° or 3 °, in cross section with respect to the horizontal under the influence of the pretensioning force.

The plug wall 55 can form a ring segment 57 projecting vertically downward over the area of the circumferential lip segment 53. This ring section 57 is suitable for sinking into the subsequent, essentially U-shaped spring limb region in the depressed operating position of the dispenser according to fig. 12 and for substantially filling said spring limb region.

When the dispenser operation is carried out and the pressure in the outlet chamber 19 rises therewith, the lip section 53 is lifted from its sealing seat (the projection 52 of the holding projection 30) as a result of the lip section 53 pivoting about the holding region 56. In the open position of the discharge valve, material M is guided from beside the lip section 53 into the annular space 58 created between the side walls 20 and 34 and through this annular space into the outlet channel 23.

The plug 54 can here essentially form the top of the outlet chamber 19.

According to the preceding embodiment, the guidance of the head part 4 in the direction of the longitudinal center axis x on the mounting 10 and thus on the material container 3 with the storage space 2 can be achieved by means of a guided abutment of the mounting-side rib 48 on the inner surface of a fourth column section 62 facing the head part 4, which fourth column section 62 can be formed directly by the annular wall section 18.

The vertical flange 17 can be part of the outer third column section 61 of the mounting 10 and forms a radially inwardly directed, if appropriate annular stop projection 63 on the end side toward the head part 4. The stop projection 63 is preferably used to define a stop of the head part 4 in the initial position, for which purpose the stop projection 63 interacts with a mating stop 64 of the head part 4. The mating stop 64 can preferably be formed on the aforementioned fourth column section 62 of the head part 4.

In the preceding embodiments, the guidance and the stop limitation are respectively produced by the same components of the head part 4, in this case by the same parts of the fourth column section 62.

In the fourth and fifth embodiments of the dispenser 1 shown in fig. 12 to 22, different components are used for the stop definition and guidance both with respect to the head part 4 and with respect to the mounting part 10. Here, the ribs 48 are preferably not provided on the mount side in these embodiments.

Instead, mounting element 10 has, in addition to a radially outer third column section 61, a radially inner further first column section 59, which further first column section 59 is preferably oriented concentrically to third column section 61. The first cylindrical section 59 of the mounting element 10 preferably starts from the transition region between the conical region 11 of the mounting element 10 and the base of the mounting element 10, which base extends substantially transversely to the longitudinal center axis x. This first column section 59 can extend, starting from the base of the mounting element 10, as viewed in the axial direction, almost into the opening plane of the mounting element 10 defined by the free edge of the third column section 61.

In this exemplary embodiment, the stop limitation is also formed on the basis of the interaction of the third post section 61 of the mounting part 10 and the fourth post section 62 of the head part 4, in particular on the basis of the interaction of the stop projection 63 on the mounting part side and the mating stop 64 on the head part side, wherein the mating stop 64 can optionally be formed by individual ribs which are arranged on the outer wall side in the circumferential direction of the fourth post section 62 and extend substantially in the axial direction.

The guide is formed by the interaction of the first post section 49 on the mounting side with a second post section 60 of the head 4, which is separately provided, wherein the first post section 59 on the mounting side can be arranged radially outward with respect to the second post section 60 of the head 4, as shown. The guide post section is arranged radially on the whole radially inward with respect to the stop post section, wherein, according to a preferred embodiment, the head-side second post section 60 can be formed by an annular wall section 18 of the retaining receptacle 31, which is elongated in the axial direction with respect to the exemplary embodiment described above.

The valve plugs 42 of the fourth and fifth embodiments can also be designed as a shell, for example, as described with reference to fig. 12. In accordance with the illustrations of fig. 18 to 22, the shell-like valve plug 42 can have a pin 65, if appropriate a web or cross-web, which can preferably be integrally and materially integrally formed with the valve plug 42, centrally around the longitudinal center axis x. The pin 65 may extend from the bottom of the valve plug 42 to the plane of the valve plug 42 shell opening. This embodiment makes it possible to increase the rigidity in this region of the valve plug 42.

Furthermore, the fourth and fifth exemplary embodiments also differ from exemplary embodiments 1 to 4 with regard to the design and orientation of the leg 26 of the spring element 22. In the fourth and fifth exemplary embodiments, therefore, it is preferred not to provide a leg which extends substantially horizontally and which merges via a bend into an upward leg. Instead, in the unloaded initial position, the leg 26 preferably rises in a continuous curved conical manner, starting directly in the transition into the plug projection 28 and opening into the holding projection 30 on the end side. The limb 26 extends here along a straight line, or preferably along a continuous curved line, for example according to the vertical section in fig. 13 or 17. According to the enlarged views in fig. 14 and 19, the straight line connecting the opening of the limb 26 into the plug projection 38 on the one hand and the opening into the retaining projection 30 on the other hand encloses an acute angle of approximately 15 ° to 30 ° with respect to a plane which is oriented transversely to the longitudinal center axis x and preferably parallel to the opening plane E.

The conical design of the section of the spring element 22, which is formed by the leg 26 in cross section, enables an advantageous installation of the spring element.

The substantially cylindrically raised configuration of the limb 26 enables greater stability of the spring element 22 in the inoperative position, in particular in the inadvertent depression of the head part 4. In other embodiments, the conically rising limb can also be combined with a substantially horizontally oriented section according to the first exemplary embodiment, starting from the plug projection 38.

Furthermore, according to the embodiment shown in fig. 18 to 22, the flange 66 can be integrally and materially integrally formed on the underside of the foot 26 and thus radially on the outside with respect to the plug projection 38 in the transition region from the plug projection 38 into the foot 26. This flange 66 can, as shown, have a flat bottom surface which is directed toward the mounting part 10 and is oriented transversely to the longitudinal center axis x, and which, as shown, can also be spaced at an axial distance from the end face of the facing receptacle wall 16. The axial distance may correspond to about 0.5 to 2 times, further about 1 time, the material thickness of such a receptacle wall 16.

Increased rigidity can be achieved by the flange 66 in this transition region from the plug projection 38 into the leg 26, whereby the leg 26 preferably begins to bend only approximately from the region that is radially outwardly connected to the flange 66 when the head part 4 according to fig. 20 is operated. The bending region is located in a targeted manner in the region of the thin wall formed by the limb 26.

As can be seen in the views of fig. 13 to 22, the projection seat 35 of the retaining projection 30 can be axially spaced apart from the groove base 67 of the groove 32 in the facing retaining receptacle 31 relative to its end face pointing upward toward the top section 21. This axial distance may correspond to about 0.5 to 2 times, further about 1 time, further for example about corresponding to the material thickness of the second column section 60 radially outwardly defining the groove 32, the axial distance between the flange 66 and the receptacle wall 16.

This axial distance can be produced according to one possible embodiment by a rib formed separately in the circumferential direction on the groove base 67, onto which the lug base 35 is pressed during installation. This enables a defined abutment of the projection seat 35 in the holding receptacle 31. This makes it possible to compensate for possible irregularities, for example due to air bubbles between the contact surfaces.

The discharge opening 25 which is closed in the unloaded starting position can also be formed by a U-shaped opening which is open at the edge in the direction of the leg 26 (see in particular fig. 18 and 20), as a result of which a further improved flow of material can be produced during operation of the dispenser.

The recess 68, which is oriented substantially in the direction of the longitudinal center axis and which merges into the outlet channel 23, for receiving the flap-shaped valve section 40 can be formed according to the fifth embodiment shown in fig. 18 to 22, starting from the holding receptacle 31, by forming a free excess 69 beyond the region of the outlet channel 23.

The recess 68 formed behind the valve section 40 in the pivoting direction of the valve section 40 during operation of the head part 4 can also be enlarged in relation to the previous exemplary embodiment in such a way that an escape space for the valve section 40 is created. The clearance space can provide sufficient pivotal mobility for the valve section 40 while providing pivotal definition.

As can be seen in particular from the perspective views in fig. 21 and 22, in other embodiments, the valve section 40 can have a concave recess 71 radially on the outside, respectively toward the outlet channel 23, as a result of which the advantageous pivoting and spring properties of the valve section 40 can be produced overall while the stability of the latter is further increased.

The valve section 40 can alternatively also be flanked on both sides in the circumferential direction by radially thick-walled rib sections 72 along the reference longitudinal center axis x relative to the flap section, as viewed in the circumferential direction according to the embodiment of fig. 23, with a central, relatively thin-walled flap section 73. The thickness of the rib section 72 may correspond to about 3 to 5 times, further about 4 times, the thickness of the flap section 73 as viewed in the same direction.

Furthermore, as shown, a transition section 74 of reduced thickness relative to the adjacent rib section 72 may be formed circumferentially between the rib section 72 and the lobe section 73, which may correspond to about half the thickness dimension of the rib section 72 and further to about twice the thickness dimension of the lobe section 73.

The flap structure enables a favorable pivoting mobility while at the same time being sufficiently stable, in particular in the valve-closing position. The valve section 40 thus formed can be pivoted only in the region of the central flap section 73 when necessary during operation of the dispenser in order to open the valve. The edge-side rib sections 72 can be supported in the aforementioned excess 69, if necessary. Alternatively or in combination therewith, during operation of the dispenser, the thick-walled rib section 72 can also be pivoted with the central thin-walled flap section 73, and if necessary with the transition section 74, into the valve open position, but if necessary pivoted relative to the central flap section 73 and/or the transition section 74 over a smaller pivot angle, for example, as a result of the rib section 72 engaging into the excess amount 69 which allows a defined pivoting movement.

The embodiments described above serve to illustrate the invention of the present application as a whole, which is based on the prior art by at least the following feature combinations, each independently, wherein two, more or all of these feature combinations can also be combined, namely:

a dispenser 1, characterized in that the holding formations are configured as holding projections 30 which are larger in cross section relative to the legs 26 and are annular in their entirety, having upper projection bases 35 in the holding receptacles 31, which projection bases have a closed cross section.

A dispenser 1, characterized in that the transition area U has a hinge-like narrowing.

Dispenser 1, characterized in that the holding projection 30 forms a projection limb 36 which projects perpendicularly downward relative to a transition region U between the upward limb 28 and the holding projection 30 and which extends radially outward to the upward limb 28, starting from the transition region U, with reference to a longitudinal center axis of the dispenser 1.

A dispenser 1, characterized in that the holding reception 31 of the head member 4 is designed as a vertically downwardly open groove 32 for receiving the holding projection 30.

A dispenser 1, characterized in that the holding projection 30 extends vertically upwards starting from a transition area U.

A dispenser 1, characterized in that the retaining projection 30 engages into a surrounding, vertically downwardly open groove 32 of the head part 4.

A dispenser 1, characterized in that the channel 32 has side walls 20, 34 of different lengths in the vertical direction with reference to the cross-section 2.

A distributor 1, characterized in that the side wall 20 lying radially on the inside with reference to the longitudinal mid axis x is shorter than the side wall 34 lying radially on the outside.

A dispenser 1, characterised in that the radially outer side wall 34 projects vertically downwardly beyond a lug limb 36.

Distributor 1, characterized in that the radially inner side wall 20 ends in the transition region U with respect to its vertical extent.

A dispenser 1, characterized in that the wall thickness c of the plug projection 38 measured in the radial direction corresponds to 1.5 or more times the maximum thickness d in the region of the horizontally running limb 26.

Dispenser 1, characterized in that the plug projection 38 has an axial length starting from a lower edge 39 of the leg 26 extending horizontally in the initial position, which is equal to or greater than an axial extension f of the spring element 22 starting from the lower edge 39 of the horizontally extending leg 26 to an axially upper end of the holding projection 30.

A dispenser 1 is characterized in that a valve section 40 for constituting a discharge valve 41 is integrally formed on the holding projection 30.

A dispenser 1, characterized in that the valve section 40 is configured on a circumferential section of a retaining projection 30 which is larger than the largest free opening dimension in the circumferential direction of the discharge opening corresponding to the outlet channel 23 adjacent to the retaining projection 30.

A dispenser 1, characterized in that the valve section 40 extends over a part of the circumference of the holding projection 30 of one third or more.

A dispenser 1, characterized in that the valve section 40 is of constant shape and is of closed-loop, circumferential design.

Distributor 1, characterized in that a groove 46 for receiving a valve section 40 is formed in head part 4 in the circumferential direction outside outlet channel 23.

A dispenser 1, characterized in that the retaining projection 30 cooperates with the lip section 53 of the head member 4 to form the outlet valve 41.

A dispenser 1, characterized in that the lip portion 53 extends freely projecting radially outwards from a radially inner holding area 56 with reference to a cross section.

A dispenser 1, characterized in that the lip portion 53 is configured to extend substantially horizontally in cross section.

A dispenser 1, characterized in that the lip section 53 cooperates with a vertically upwardly free support surface 51 of the holding projection 30.

A dispenser 1 is characterized in that an annular projection 52 is formed on the support surface 51, on which projection a lip portion 53 is sealingly seated.

A dispenser 1, characterized in that the lip section 53 is configured on a plug member 54 arranged in the head member 4.

A dispenser 1 is characterized in that the lip portion 53 merges radially inwardly into a circumferential, annular portion 57 which projects perpendicularly downward with reference to a cross section and protrudes beyond the lip portion 53.

A dispenser 1, characterized in that said lip segment 53 and/or said plug 54 are comprised of hard plastic.

A dispenser 1, characterized in that said horizontally extending footer 26 is further constructed integrally with an inlet valve 43.

A dispenser 1, characterized in that the head part 4 is guided in a defined manner in a stop on the mounting facing the storage space 3.

A dispenser 1 is characterized in that the guide and stop limits correspond to different components of the head part 4 and the mounting part 10.

A dispenser 1, characterized in that the mounting member 10 has a first column section 59 which cooperates with a second column section 60 of the head member 4 for guiding.

A dispenser 1, characterized in that the mounting part 10 also has a third column section 61 for latching with the storage space 2, which third column section cooperates with a fourth column section 62 of the head part 4 for stop limitation.

All features disclosed, either individually or in combination, are essential to the invention. The disclosure of the present application therefore also includes the entire disclosure of the associated/attached priority documents (copy of the prior application), for which reason the features of the priority documents are also incorporated into the claims of the present application. The dependent claims, even without having the features of the cited claims, which in particular can be filed as a basis, manifest themselves in an independently inventive further development of the prior art. The invention as set forth in each claim may additionally have one or more of the features set forth in the foregoing description particularly in the case of reference numerals and/or in the case of reference numeral lists. The invention also relates to the design of the various ways in which some of the features mentioned in the above description may not be implemented, particularly when it is considered to be insignificant for the respective purpose of use or can be replaced by other means serving the same technical purpose.

List of reference numerals

1 Dispenser

2 storage space

3 Material container

4 head component

5 limiting member

6 follow-up piston

7 bags

8 closed cover

9 bottom of the shell

10 mounting piece

11 conical region

12 plug receptacle

13 basin wall

14 pot top

15 entry opening

16 wall of the receptacle

17 vertical flange

18 annular wall section

19 output chamber

20 side wall

21 top section

22 spring element

23 output channel

24 output opening

25 discharge opening

26 side foot

27 bending part

28 upward edge

29 delimiting wall

30 holding projection

31 holding and accommodating part

32 groove

33 groove top

34 side wall

35 base of protrusion part

36 protruding part side foot

37 narrowing part

38 plug protrusion

39 lower edge

40 valve section

41 discharge valve

42 valve plug

43 admission valve

44 opening

45 connecting strip

46 groove

47 base section

48 Ribs

49 Rib

50 operating surface

51 bearing surface

52 projection part

53 lip segment

54 plug-in component

55 plug wall

56 holding area

57 ring segment

58 annular space

59 first column section

60 second column section

61 third column section

62 fourth column section

63 stop boss

64 mating stop

65 pin

66 flange

67 groove bottom

68 recess

69 overrun amount

70 avoidance space

71 forming section

72 rib section

73 lip segment

74 transition region

Length of a

b length

c wall thickness

d thickness

e length

Length f

x longitudinal central axis

E plane of opening

M Material

U transition region