阅读说明：本技术 用于实验室设备的操作元件 (Operating element for laboratory equipment ) 是由 罗曼·迪尔 乔治·阿卡尔迪 于 2018-02-15 设计创作，主要内容包括：本发明涉及一种操作元件(11),该操作元件具有支撑部件(13),该支撑部件能够安装在设备壳体上,特别是安装在实验室设备(例如实验室搅拌器)的壳体上,并且具有保持在支撑部件上的旋钮(15),该旋钮能够围绕旋转轴旋转,该旋钮还设置有永磁体(17)并且额外地还能够相对于支撑部件在轴向方向上在释放位置和压下位置之间调节,其中,由于作用在支撑部分和旋钮之间的磁力,旋钮可以从压下位置复位到释放位置。(The invention relates to an operating element (11) having a support part (13) which can be mounted on a device housing, in particular on a housing of a laboratory device (for example a laboratory stirrer), and having a rotary knob (15) which is held on the support part and can be rotated about a rotational axis, which rotary knob is also provided with a permanent magnet (17) and can additionally be adjusted in the axial direction relative to the support part between a release position and a depressed position, wherein the rotary knob can be reset from the depressed position to the release position as a result of a magnetic force acting between the support part and the rotary knob.)

1. A control element (11) with a carrier part (13) which can be attached to a device housing, in particular a housing of a laboratory device, such as a laboratory stirrer, and with a rotary knob (15) which is held at the carrier part, the rotary knob (15) being rotatable about a rotational axis, the rotary knob (15) being provided with a permanent magnet (17), the rotary knob (15) being adjustable in relation to the carrier part (13) in an axial direction between a non-pressed position and a pressed position, wherein the rotary knob (15) can be returned from the pressed position to the non-pressed position on the basis of a magnetic force acting between the carrier part (13) and the rotary knob (15).

2. The control element according to claim 1, wherein,

it is characterized in that the preparation method is characterized in that,

the rotary knob (15) is fixedly connected to the permanent magnet (17), and the carrier part (13) is provided with an element (31), which element (31) is attracted by the permanent magnet (17) and consists of a magnetic material, in particular a soft magnetic material.

3. The control element according to claim 2, wherein,

it is characterized in that the preparation method is characterized in that,

in order to establish a fixed connection, the rotary knob (15) can have a receptacle (19) on its side facing the carrier part (13), the permanent magnet (17) being received in the receptacle (19), in particular in an interference fit, in a force-fitting manner and in particular releasably, preferably the permanent magnet (17) being insertable axially into the receptacle (19) and/or the receptacle (19) being placeable axially onto the permanent magnet (17).

4. The control element according to claim 2 or 3,

it is characterized in that the preparation method is characterized in that,

the permanent magnet (17) and the magnetic element (31) are arranged relative to each other such that a gap between the permanent magnet (17) and the magnetic element (13) increases as the knob (15) is adjusted to the pressing position.

5. The control element according to at least one of claims 2 to 4,

it is characterized in that the preparation method is characterized in that,

the magnetic material is ferritic steel.

6. Control element according to at least one of the preceding claims,

it is characterized in that the preparation method is characterized in that,

the permanent magnet (17) is configured as a radially magnetized ring magnet in particular.

7. The control element according to claim 6, wherein,

it is characterized in that the preparation method is characterized in that,

the carrier part (13) has a, in particular disc-shaped, carrier base (21) which can be attached to the device housing, and has a retaining pin (23) which projects from the carrier base (21) in the direction of the rotary knob (15), and the annular magnet (17) rests, in particular in a locking manner, on the retaining pin (23), the free end of the retaining pin (23) preferably being sleeve-shaped.

8. The control element according to claim 7,

it is characterized in that the preparation method is characterized in that,

the sleeve-like free end of the retaining pin (23) has a retaining means (29), in particular a flexible snap hook (29), to retain the ring magnet (17) placed thereon in a form-fitting manner and can be radially compressed, in particular due to the flexible snap hook (29), so that the ring magnet (17) can be placed thereon.

9. The control element as set forth in claim 8,

it is characterized in that the preparation method is characterized in that,

the sleeve-like free end of the retaining pin (23) is provided with a radially outwardly projecting collar (27) and with an axially outwardly extending slit (27) to form the flexible snap hook (29).

10. Control element according to at least one of claims 7 to 9,

it is characterized in that the preparation method is characterized in that,

the magnetic element (31) or at least a part (35) thereof is arranged at the free end of the retaining pin (31), abutting it in the axial direction, the ring magnet (17) being arranged between a carrier seat (21) of the carrier component (13) and the magnetic element (31) or a part (35) thereof.

11. Control element according to at least one of claims 7 to 10,

it is characterized in that the preparation method is characterized in that,

the magnetic element (31) can have a shaft part (33), the shaft part (33) carrying a head part (35), in particular a disk-shaped head part, the shaft part (33) being plugged into the sleeve-shaped free end of the holding pin (23), and the head part (35) being arranged outside the sleeve-shaped free end of the holding pin (23).

12. Control element according to at least one of claims 6 to 11,

it is characterized in that the preparation method is characterized in that,

the rotary knob (15) has a polygonal socket (19), in particular a hexagonal socket (19), on its side facing the carrier part (13), the annular magnet (17) being received in the polygonal socket (19), in particular in an interference fit, in a force fit and in particular releasably.

13. Laboratory device, in particular laboratory stirrer, having a housing and having a control element (11) according to one of the preceding claims, the control element (11) being arranged outside the housing.

14. The laboratory device according to claim 13,

it is characterized in that the preparation method is characterized in that,

the control element (11) is adhesively bonded to the housing in a form-fitting or force-fitting manner or with material continuity.

15. Laboratory apparatus according to claim 13 or 14,

it is characterized in that the preparation method is characterized in that,

sensor means are provided which are arranged in the housing and are used to detect the rotational and axial position of the rotary knob (15), in particular of the permanent magnet (17).

Technical Field

The present invention relates to a control element attachable to a device housing, in particular to a housing of a laboratory device. The laboratory apparatus may in particular be a laboratory stirrer, such as an overhead stirrer or also a rotary evaporator, a magnetic stirrer, a vibration and mixing device, or a peristaltic pump.

Background

From document DE 102014111715 a1, a control element for laboratory equipment is known that comprises a manually actuatable knob that can be rotated about a rotational axis, in which knob a button element provided with a permanent magnet is integrated, which button element can be adjusted between a non-pressed position and a pressed position, a mechanical spring providing the return of the button element. The sensor device is arranged in the housing of the laboratory device, whereby the rotational position of the rotary knob can be detected by means of the position of the permanent magnet on the one hand and the axial position of the push button element can be detected by means of the position of the permanent magnet on the other hand. For example, the operating parameters of the laboratory device may be set by a knob, and then the setting of the operating parameters is determined by a button element. However, the installation of the control element is relatively complicated.

Disclosure of Invention

The basic object of the invention is to simplify the design of a control unit of the initially named type.

This object is met by a control element having the features of claim 1, in particular by a control element having a carrier part which can be attached to a device housing, in particular a housing of a laboratory device, for example a laboratory stirrer, and having a knob which is held at the carrier part, in particular releasably held at the carrier part, which knob is manually actuatable, which knob can be rotated about a rotational axis, which knob is provided with a permanent magnet, which knob (in particular as a whole) can be adjusted in an axial direction relative to the carrier part between a non-pressed position and a pressed position, wherein the knob can be returned from the pressed position to the non-pressed position on the basis of a magnetic force acting between the carrier part and the knob.

Thus, in keeping with the present invention, no separate button element is provided, but the knob itself (in particular as a whole) is pressed to ensure the pressing operation. The knob is especially formed as a one-part knob and push button. Furthermore, this return is not performed by a mechanical spring upon press actuation, but by a magnetic force acting between the carrier member and the knob. Thus, no spring is required to return. The rotary knob can in particular be returned without or without a spring, or the control element can have an inelastic or springless design. The structure of the control element in accordance with the invention is therefore particularly simple.

The rotational position and the axial position of the rotary knob can be recognized by corresponding sensor devices (in particular by hall-effect based magnetic field sensors) with reference to the axial position of the permanent magnet.

Consistent with a preferred embodiment of the invention, the knob is fixedly connected to the permanent magnet, and the carrier part is provided with an element of a magnetic material, in particular a soft magnetic material, and is attracted by the permanent magnet to generate a magnetic force acting between the carrier part and the knob. Magnetic (in particular soft magnetic) materials are in particular ferromagnetic (in particular soft magnetic) materials. The magnetic material may be magnetized by the magnetic field of the permanent magnet and then attracted by the permanent magnet.

In order to establish a fixed connection, the rotary knob can have a receptacle on its side facing the carrier part or at its inner side, and the permanent magnet is received therein in a force-fitting manner, in particular in an interference-fitting manner, and in particular releasably. The permanent magnet is preferably (in particular only) insertable into the receptacle from the axial direction and/or the receptacle is (in particular only) placeable onto the permanent magnet from the axial direction. The fixed connection between the knob and the permanent magnet can thus be established in a particularly simple manner.

The permanent magnet and the magnetic element are in particular arranged relative to each other such that the gap between the permanent magnet and the magnetic element increases as the knob is adjusted to the pressed position.

Then, the pressing knob can be returned to the non-pressing position again by the attractive magnetic force acting between the permanent magnet and the magnetic element.

The magnetic material is preferably ferritic steel. Such materials have been shown to be particularly suitable in themselves for the present invention.

The permanent magnet is preferably configured as a ring magnet, in particular as a radially magnetized ring magnet. The carrier part may then have a carrier foot (in particular a disk-shaped carrier foot) which can be attached to the device housing and may have a retaining pin which projects from the carrier foot in the direction of the rotary knob, and the ring magnet is placed on the retaining pin (in particular in a locking manner on the retaining pin). The rotary knob can thus be positioned in a simple manner in the correct position of the carrier part and can in particular be held in the correct position of the carrier part. The free end of the holding pin (i.e. at least the free end of the holding pin, i.e. only the free end or the additional other end, and thus the holding pin as a whole) may be formed sleeve-like.

In accordance with a preferred embodiment of the invention, the sleeve-like free end of the retaining pin has a retaining means (in particular a flexible snap hook) to retain the ring magnet placed thereon in a form-fitting manner and can be radially compressed (in particular due to the flexible snap hook) to enable the ring magnet to be placed thereon. In this regard, the sleeve-like free end of the retaining pin may be provided with a radially outwardly projecting collar and may have an axially outwardly extending slit to form a flexible snap hook.

The magnetic element or at least a part thereof may also be arranged at the free end of the retaining pin, adjoining it in the axial direction, the ring magnet being arranged between the carrier base of the carrier component and the magnetic element or a part thereof. In particular, this ensures that the permanent magnet and the magnetic element are arranged relative to one another such that the gap between the permanent magnet and the magnetic element increases as the rotary knob is adjusted into the pressed position.

The magnetic element may have a shaft part carrying a head part (in particular a disk-shaped head part) which is slipped into the sleeve-shaped free end of the holding pin and which is arranged outside the sleeve-shaped free end of the holding pin. The shaft part can be slipped through a clearance into the sleeve-like free end of the retaining pin, since it is already retained on the retaining pin anyway due to the magnetic force of the permanent magnet, in particular locked on the retaining pin.

Consistent with an embodiment of the invention, the rotary knob may have a polygonal socket (in particular a hexagonal socket) on its side facing the carrier part or at its inner side and the ring magnet is received therein, in particular in an interference fit, in a force-fit or clamping manner. A safe and simultaneously releasable connection between the rotary knob and the ring magnet can thereby be established in a simple manner. The polygonal socket corresponds in particular to the above-mentioned receiver which receives the ring magnet, which preferably can be inserted (in particular only) into the polygonal socket from the axial direction and/or onto which the polygonal socket can be placed (in particular only) from the axial direction. However, in general, force-fitting connections or connections with material continuity are also possible.

The invention also relates to a laboratory device, in particular a laboratory mixer, having a housing and having a control element as described above, which is arranged outside the housing. The control element can be attached to the housing in a form-fitting or force-fitting manner or with material continuity. The control element is preferably glued to the housing. In particular, a sensor device is provided for detecting the rotational position and the axial position of the rotary knob (in particular of the permanent magnet), which is arranged in particular in the housing.

Drawings

Non-limiting embodiments of the invention are illustrated in the accompanying drawings and will be described below. Shows that:

FIG. 1 shows an exploded view of a control element consistent with the present invention;

FIGS. 2A, 2B show respective longitudinal cross-sectional views of the control element of FIG. 1 in a non-depressed position and in a depressed position; and

fig. 3 shows a bottom view of the knob of the control element of fig. 1.

Detailed Description

Fig. 1 shows a control element 11 for a laboratory device. The control element 11 comprises a carrier part 13, by means of which carrier part 13 the control element 11 can be attached (in particular can be glued) to the housing of the laboratory device, and a knob 15, which knob 15 is held at the carrier part 12, which knob 15 is manually actuatable and rotates about a rotational axis. Furthermore, a permanent magnet is provided in the form of a radially magnetized ring magnet 17, which ring magnet 17 is fixedly connected to the knob 15 and has its axial direction coinciding with the axis of rotation of the knob 15. The rotational position of the ring magnet 17, which is recognizable by the sensor means arranged within the device housing, corresponds to the rotational position of the respective knob 15, so that the operating parameters of the laboratory device can be set by rotating the knob 15.

Consistent with fig. 3, a fixed connection between the rotary knob 15 and the ring magnet 17 is achieved, wherein the rotary knob 15 has a hexagonal socket 19 at its inner side facing the carrier part 13, and the ring magnet 17 is received therein in an interference-fit manner and thus in a force-fit manner. The rotation of the knob 15 is therefore a result of a corresponding rotation of the ring magnet 17.

In order to hold the rotary knob 15 at the carrier part 13, the carrier part 13 has a holding pin 23, which holding pin 23 projects from the disk-shaped carrier base 21 of the carrier part 13 in the axial direction of the rotary knob 15, and the ring magnet 17 fixedly connected to the rotary knob 15 rests in a locking manner on the holding pin 23. For this purpose, the free end of the retaining pin 23 is sleeve-shaped and has a peripheral, radially outwardly projecting collar 25 and two axially outwardly extending slits 27. The free ends of the retaining pins 23 are thus configured as two flexible snap hooks 29, each bent radially inwards, which snap hooks 29 on the one hand allow the ring magnet 17 to be placed thereon and on the other hand lock the ring magnet placed thereon and hold it in a form-fitting manner at the carrier part 13.

Furthermore, the knob 15 is additionally pressable, i.e. adjustable in the axial direction relative to the carrier part 13 between a non-pressing position (as shown in fig. 2A for example) and a pressing position (as shown in fig. 2B for example). Since the ring magnet 17 is fixedly connected to the knob 15, the ring magnet 17 also adopts a non-depressed or depressed position corresponding to the knob 15. This axial position of the ring magnet 17 can likewise be recognized by the sensor device described above. Once the operating parameters of the laboratory device have been set by rotating the knob 15, the setting of the operating parameters can be determined by subsequently pressing the knob 15.

In order to return the rotary knob 15 from its pressed position to its non-pressed position, an element 31 made of a magnetic material is provided in the form of a punch. The magnetic element 31 has a shaft portion 33 and a head portion 35, the shaft portion 33 being tucked into the sleeve-like free end of the retaining pin 23, and the magnetic head 35 being arranged outside the retaining pin 23 and abutting the retaining pin 23 in the axial direction. The ring magnet 17 is thus arranged between the carrier part 13 and the head 35 of the magnetic element 31, such that when the knob 15 is pressed, the gap between the ring magnet 17 and the magnetic element 31 increases. The diameter of the shaft portion 33 of the magnetic element 31 is chosen such that, when the shaft portion 33 of the magnetic element 31 is plugged into the holding pin 23, the free end of the sleeve-like holding pin 23 cannot be compressed at least so much that the ring magnet 17 can be pulled out of the holding pin 23.

The magnetic material is a ferromagnetic and soft magnetic material, preferably ferritic steel, which is magnetized and thus attracted by the magnetic field of the ring magnet 17. By the magnetic force thus acting between the ring magnet 17 and the magnetic element 31 and thus between the knob 15 and the carrier part 13, the activation knob 15 automatically returns to the non-activated position after the pressure-activated is removed.

In order to assemble and attach the above-mentioned control element 11 to the laboratory device, the carrier part 13 is first glued to the housing of the laboratory device, and in fact at the point where the above-mentioned sensor means are located in the inner housing. The ring magnet 17 is then placed in a locked manner on the retaining pin 23 of the carrier part 13. The magnetic element 31 is then jammed into the retaining pin 23, and the jammed connection can be affected by the gap, since the magnetic element 31 is attracted by the ring magnet 17 and thus has been magnetically retained in the retaining pin 23. Finally, the knob 15 is placed axially on the ring magnet 17. The placement is effected here by a force fit, and the knob 15 can also be pulled off again from the ring magnet by a corresponding force.

A control element consistent with the present invention is simple and consists of a small number of elements and does not require any mechanical spring to return the control button to its initial position after pressing actuation.

List of reference numerals

11 control element

13 Carrier Member

15 knob

17 Ring magnet

19 hexagonal socket

21 carrier base

23 holding pin

25 ringer ring

27 slit

29 curved snap hook

31 magnetic component

33 shaft part

35 head part