阅读说明：本技术 用于调节包括电动调节单元的座椅家具的支撑部分的倾斜度的电动调节单元 (Electric adjustment unit for adjusting the inclination of a support part of a piece of seating furniture comprising an electric adjustment unit ) 是由 M·施莱克 于 2020-05-07 设计创作，主要内容包括：本发明涉及一种用于调节座椅家具(1)的保护部分的倾斜度的电动调节装置(10),所述电动调节装置包括至少一个枢转驱动器(11),所述至少一个枢转驱动器用于借助可旋转的驱动元件(116a)而固定到所述座椅家具(1)的主体元件,驱动支架能够牢固地固定在所述可旋转的驱动元件上,并且所述驱动支架支撑所述保护部分。本发明还涉及一种包括电动调节单元(10)的座椅家具(1)。(The invention relates to an electric adjusting device (10) for adjusting the inclination of a protective part of a piece of seating furniture (1), comprising at least one pivot drive (11) for fixing to a main element of the piece of seating furniture (1) by means of a rotatable drive element (116a) to which a drive bracket can be fixedly fixed and which supports the protective part. The invention also relates to a piece of seating furniture (1) comprising an electric adjustment unit (10).)

1. An electric adjustment unit (10) for adjusting the inclination of a support portion of a piece of seating furniture (1), comprising at least one pivot drive (11) for fastening to a body element of the piece of seating furniture (1) with a rotatable output element (116a), on which at least one pivot drive (11) an output plate (112) is mountable in a rotationally fixed manner, which output plate carries the support portion.

2. An electric adjustment unit (10) according to claim 1, wherein the output element (116a) is rigidly engaged with a corresponding receptacle of the output plate (112).

3. An electric adjustment unit (10) according to claim 1 or 2, wherein the pivot drive (11) has a carrier plate (111) by means of which it can be fastened to the body element and on which at least two intermeshing gearwheel (116) are mounted, which at least two intermeshing gearwheel (116) form a reduction gear.

4. An electric adjustment unit (10) according to claim 3, wherein a bearing plate (115) is arranged parallel to the carrier plate (111), in which bearing plate the gearwheel (116) is also mounted.

5. An electric adjustment unit (10) according to claim 3 or 4, wherein the output element (116e) is arranged or formed on one of the gearwheel (116) of the pivot drive (11).

6. Electric adjustment unit (10) according to one of claims 1 to 5, wherein a further pivot drive (14) is provided which is coupled to the pivot drive (11) via a synchronization shaft (13) and likewise has a rotatable output element (146e) on which an output plate (142) is likewise mountable in a rotationally fixed manner, which output plate also carries the support section.

7. The electromotive adjustment unit (10) according to one of claims 3 to 5 and claim 6, wherein the further pivot drive (14) further has a carrier plate (141) on which at least two mutually engaging gearwheel (146) are mounted, the at least two mutually engaging gearwheel (146) forming a reduction gear, wherein the output element (146e) is arranged or formed on one of the gearwheel (146) of the further pivot drive (11).

8. An electric adjustment unit (10) according to claim 7, wherein the reduction gear of the pivot drive (11) and the reduction gear of the further pivot drive (14) have the same reduction ratio, and wherein the drive shafts (116b,146b) of both reduction gears are coupled to the same motor unit (12).

9. An electric adjustment unit (10) according to claim 8, wherein the motor unit (12) comprises an electric motor (12) and a downstream gear.

10. An electric adjustment unit (10) according to claim 9, wherein the transmission of the motor unit (12) is a worm gear.

11. Seating furniture (1) comprising an electric adjustment unit (10) according to one of claims 1 to 10, via which a support part is pivotably mounted.

12. Seating furniture according to claim 11, wherein the pivotally mounted support part is a head part (3) of the seating furniture (1), which head part is pivotable relative to a back part (2).

Technical Field

The present invention relates to an electric adjustment unit for adjusting the inclination of a support part of a piece of seating furniture. The invention also relates to a piece of seating furniture having an electric adjustment unit.

Background

The upholstered furniture, in particular the upholstered armchair or the upholstered sofa part, may have an adjustable inclination of the support part. For example, headrests or armrests are used as support parts which, due to their adjustability of inclination, on the one hand enable ergonomic adjustability of the furniture and, on the other hand, design variability. Comfort adjustment can be achieved by means of an electric adjustment unit. Such an electric adjustment unit comprises at least one drive unit, which is usually in the form of a linear drive and acts via a push rod and/or a lever on a support part which is pivotably connected to a body element, for example a back part, via a pivot fitting. For example, publication DE 102013200328 a1 shows such an adjustment unit, in which the headrest is pivoted by pushing the driver via a link chain.

In these arrangements known from the prior art, there must be sufficient space in the back section to be able to arrange the linear drive in the back section and to be able to guide the desired arrangement of the push rod and/or the lever to the support section. The push rod or lever must also be guided through the transition area between the body element and the support part, which may lead to an increased risk of jamming and is also disadvantageous from a visual point of view.

Disclosure of Invention

It is therefore an object of the present invention to provide an electromotive adjustment unit for adjusting the inclination of a support part of a piece of seating furniture, which is constructed as simply as possible and in which the transmission of the movement to the support part is as problem-free as possible.

This object is solved by an electric adjustment unit and seating furniture having the features of the respective independent claims. Advantageous designs and further developments are the subject matter of the dependent claims.

An electric actuating unit of the type mentioned at the outset has a pivot drive for attachment to a body element of the piece of seating furniture by means of a rotatable output element, on which an output plate can be mounted in a rotationally fixed manner, which output plate supports a support section.

In the electric adjustment unit according to the invention, instead of a linear drive, there is therefore a pivot drive, the support part being mounted on the output element of the pivot drive via an output plate. The pivot drive is thus both an adjustment drive and a pivot bearing for the support part, which results in a compact construction. Furthermore, no additional levers or the like are required to transmit the movement of the driver.

The output plate may have the shape and dimensions of a common mounting bracket of a (passive) pivot fitting, so that a support part designed for attachment to a known pivot fitting may be used with the electric adjustment unit depending on the application without modification.

The body element may be a fixed element of the seating furniture, for example a seat frame, or it may be a movable element, such as a back portion, with respect to which the support portion adjusts the inclination according to the invention.

In an advantageous embodiment of the electromotive adjustment unit, the output element is rigidly engaged in a corresponding receptacle of the output plate. Due to the positive locking, which is achieved, for example, by means of toothing, the required torque can be transmitted between the output element and the output plate well and reliably. For example, the output element may be provided with external teeth that are inserted into an opening having internal teeth formed on the output board.

In a further advantageous design of the electromotive adjustment unit, the pivot drive comprises a carrier plate, by means of which the pivot drive can be fastened to the main body element and on which at least two intermeshing gearwheel wheels are mounted, which form the reduction gear. The high torque on the output element required for pivoting the support part can be achieved by means of a reduction gear. By using a carrier plate which simultaneously supports the gearwheel of the reduction gear and serves for fastening the reduction gear to the main body element, a simple and material-and cost-saving structure is achieved. The fastening to the body element can again be carried out in the same way as in known (passive) pivoting fittings, so that the furniture body does not have to be modified or only slightly modified in order to use the electric adjustment unit.

Preferably, the bearing plate in which the gear is also mounted is arranged parallel to the carrier plate. Further preferably, the output element is arranged or formed on one of the gearwheel of the pivot drive. The bearing of the (output) gearwheel then advantageously also represents the pivot bearing of the support part.

In the context of the present application, a gearwheel is also to be understood as a gearwheel segment which does not have a complete set of teeth but is only within a specific angular range. In particular, the gearwheel on which the output element is arranged or formed can be designed as a gearwheel segment, since the pivoting angle of the output element is typically less than 180 ° or often even less than 90 °.

In a further advantageous embodiment of the electromotive adjustment unit, a further pivot drive is provided which is coupled to the pivot drive via a synchronizing shaft and likewise has a rotatable output element on which an output plate can likewise be mounted in a rotationally fixed manner, which output plate also carries the support section. Preferably, the other pivot drive also has a carrier plate on which at least two intermeshing gearwheel forming a reduction gear are mounted, wherein the output element is arranged or formed on one of the gearwheel of the other pivot drive. Thus, via the further pivot drive, on the one hand the pivot bearing of the support part is produced on the second side and, on the other hand, the synchronous drive of this second side is produced. This design is therefore particularly suitable for wider support sections. On the other hand, in the case of narrower support sections, a single-sided drive is also possible solely by means of the initially mentioned pivot drive.

Preferably, in the case of a double-sided drive, the reduction gear of the pivot drive and the reduction gear of the other pivot drive have the same reduction ratio, wherein the drive shafts of the two reduction gears are coupled to the same motor unit. In particular, the same transmission ratio can be achieved by the substantially identical configuration of the two gearwheels, so that advantageously as many identical components (gearwheel, output element, bearing plate, etc.) as possible can be used for the pivot drive and the further pivot drive, thereby reducing the production and storage costs.

In a further advantageous design of the electric adjustment unit, the motor unit comprises an electric motor and a downstream gear. The gear of the motor unit may be, for example, a worm gear. In this case, a self-locking mechanism may be provided which holds the support part in its position at least in case of a force suitably acting from the outside, even if no current is supplied to the motor unit.

The seating furniture according to the invention has an electric adjustment unit via which the support part is pivotably mounted. The advantages described in connection with the adjustment unit are obtained. In an advantageous design, the support part is a head part of the piece of seating furniture, also referred to as a headrest. The support portion can then be pivoted relative to the back portion as the main body element. Alternatively, the support part can also be an armrest, also referred to as an elbow rest, which can then be pivoted relative to the side part as the body element. It will be appreciated that the body element itself may also be movable relative to other parts of the seating furniture. For example, the back section may have an inclination adjustment facility and in turn support the pivotable head section via an electric adjustment unit.

Drawings

The invention is explained in more detail below by way of exemplary embodiments with reference to the accompanying drawings, in which:

fig. 1a to 1c show different views of a section of a piece of seating furniture with an adjustment unit in a first adjustment position;

fig. 2a to 2c show the piece of seating furniture according to fig. 1a to 1c in a second adjustment position in different views;

fig. 3a to 3c show various isometric views of the adjusting unit according to fig. 1a to 2c in different views;

fig. 4 shows a partial isometric exploded view of the adjustment unit according to fig. 3a to 3 c; and is

Fig. 5 shows an overall isometric exploded view of the adjustment unit according to fig. 3a to 3 c.

Throughout the drawings, the same reference numerals indicate the same or similarly acting elements. For clarity, not every element in all drawings is provided with a reference numeral.

Detailed Description

In the description, terms such as top, bottom, left, right refer exclusively to exemplary representations selected in the respective drawings. Only the terms front and rear refer to the orientation of the piece of seating furniture, wherein the front side of the piece of seating furniture is the side facing the user, on which side there is also a seating surface for the user.

In fig. 1a to 1c, a section of the piece of seating furniture 1 having a back part 2 and a head part 3 (also referred to as a headrest, which can be pivoted relative to the back part 2) is reproduced in various views. The head part 3 thus represents a pivotable support element of the piece of seating furniture 1, which is mounted as a main body element on the back part 2. Fig. 1a shows a section of the piece of seating furniture 1 in an isometric view from diagonally in front, fig. 1b shows a front view, and fig. 1c shows a side view.

In fig. 1a to 1c, the piece of seating furniture 1 is reproduced with a head portion that tapers to the greatest extent towards the rear (i.e. away from the user).

Fig. 2a to 2c reproduce the sections of the piece of seating furniture 1 in the same way as fig. 1a to 1c, but the head part 3 is displaced the most towards the front, i.e. towards the user.

The pivoting of the head part 3 takes place electrically via the adjusting unit 10. In the head part 3, a head part plate 4 is shown by way of example only. Furthermore, the back portion 2 is reproduced only by the interconnection plate forming the frame of the piece of seating furniture 1. In the fully manufactured product, both the back portion 2 and the head portion 3 are provided with upholstery attached to the illustrated plate of the back portion 2 and the head portion plate 4, respectively.

The adjusting unit 10 has two pivot drives, namely a pivot drive 11 on one side of the back section 2 and a further pivot drive 14 on the other side of the back section 2. Two pivot drives 11, 14 are used to pivotably mount the head section 3 on the back section 2 and to actively pivot the head section 3. For this purpose, the two pivot drives are coupled to a motor unit 12, which is attached to the pivot drive 11. The other pivot drive 14 is coupled to the motor unit 12 via a synchronization shaft 13, so that the two pivot drives 11, 14 pivot synchronously during operation. For fastening, the pivot drives 11, 14 are mounted on a suitable surface of the back section 2. In the exemplary embodiment shown, a mounting block 21 is provided on the back section 2, said mounting block providing a suitable surface for mounting the pivot drives 11, 14.

In an alternative design of the adjustment unit, it is also possible to drive only one side of the head part 3 on which the pivot drive 11 and the motor unit 12 are positioned. Instead of the further pivot drive 14, a (passive) pivot fitting is then arranged only on the other side of the head part 3. The synchronizing shaft 13 is not required. This design is particularly suitable for narrow head portions 3 or generally for narrow support portions.

In fig. 3a to 3c, the adjusting unit is shown in the same view and at the same angle of rotation as in fig. 2a to 2 c. Fig. 3a to 3c therefore show the adjusting unit 10 before being connected to the head part plate 4 or the back section 2. Fig. 4 shows the adjusting unit 10 in a partially exploded isometric view, wherein the viewing angle and the adjustment angle correspond to those in fig. 3 a. Fig. 5 shows the adjusting unit 10 in a fully exploded view from the same perspective as fig. 4. The structure of the adjusting unit 10 is explained in more detail below with reference to fig. 3a to 3c, 4 and 5.

The pivot drive 11 and/or the further pivot drive 14 of the adjustment unit 10 each comprise a carrier plate 111 and/or 141, which is preferably produced during the stamping process or during the stamping and bending process.

In addition to the hole for fastening the pivot drive 11 or the further pivot drive 14 to the back section 2, an opening for receiving the axle stub of the gearwheel 116 or 146 is also formed on the carrier plate 111 or 141. The carrier plates 111, 141 thus also serve to support the gearwheels 116, 146. Bearing plates 115, 145 are provided on opposite sides of each of the gearwheels 116, 146 and have corresponding mirror image holes for supporting the gearwheels 116, 146 on a side opposite the carrier plate 111, 141. In this respect, the bearing plates 115, 145 are arranged parallel to the carrier plate 111, 141 via spacer elements not further illustrated in the figures and are fixed to the carrier plate 111, 141 via the spacer elements.

The large gears 116 and 146 shown each form a reduction gear to provide the high torque required to pivot the head portion 3. The housing shells 117, 147 serve to cover each gear formed thereby.

In the example shown, the gears have a three-stage configuration and specifically each include a drive gearwheel 116a or 146a, an intermediate gearwheel 116c or 146c and an output gearwheel 116d or 146 d. The drive gearwheel 116a or 146a is coupled to the drive shaft 116b,146b and the output gearwheel 116d or 146d is coupled to the output element 116e, 146e or is made integrally with said output element 116e, 146 e.

The driving gearwheel 116a, 146a is driven by a motor unit 12, which in this example is in turn designed as a geared motor and comprises an electric motor 121 and a downstream gear 122. The gear 122 may be, for example, a worm gear, wherein a worm is arranged on the electric motor 121 and acts on a worm wheel mounted on a hollow output shaft 123. The hollow output shaft 123 is engaged by the drive shaft 116b of the pivot driver 11.

The (worm) gear 122 may be designed to be self-locking, so that when the gear motor 137 is not energized, the head portion 3 does not pivot even if an external force is applied. A configuration may also be chosen that is self-locking when a moderate force is applied during proper use, but causes the head portion 3 to pivot when an excessive external force is applied. This may prevent damage to the adjustment unit 10 or its attachment to the back section 2 or the head section 3.

The output elements 116e, 146e project outwardly through the carrier plates 111, 141 and provide mounting points to which the output plates 112, 142 are attached, each of which is mounted to the head section plate 4. For this purpose, in the example shown, the output plates 112, 142 are provided with mounting brackets 113, 143. Instead of a separate output plate 112, 142, it is also possible to provide a U-shaped circular bracket which is attached by its two legs to the output elements 116e and 146 e. Extendable output plates known per se may also be used.

For a rotationally fixed connection between the output elements 116e, 146e and the output plates 112, 142, an internal multi-tooth 114, 124 is formed in each of the output plates 112, 142 in which the respective output element 116e, 146e is rigidly engaged. The output members 116e, 146e are provided with suitable toothing. In each case, a combination of rivets 118, 148 and washers 118a, 148a is provided, which connects the output element 116e, 146e or the associated output gearwheel 116d, 146d also in the axial direction to the respective retaining bracket 11, 12. To this end, the output elements 116e, 146e and the associated output gearwheels 116d, 146d are provided with a continuous axial bore. Instead of a combination of rivets 118, 148 and washers 118a, 148a combination of bolts and (fixed or self-locking) nuts may also be used.

Rotation of the output element 116e, 146e relative to the carrier plate 111, 141 correspondingly causes pivoting of the output plate 112, 142 and thus of the head part plate 4 or the head part 3.

When the drive shaft 116b of the pivot driver 11 is directly engaged with the hollow output shaft 123 of the motor unit 12, the drive shaft 146b is coupled to the drive shaft 116b passing through the hollow output shaft 123 via the synchronizing shaft 13. The synchronizing shaft 13 has a corresponding shaft receptacle 131 for rotationally fixed coupling with the drive shafts 116b and 146 b. In this way, it is ensured that the two pivot drives 11, 14 move synchronously when the motor unit 12 is actuated. Advantageously, for this purpose, in the case of the pivot drive 11 and the further pivot drive 14, the same gearwheel 116 or 146 is used in pairs.

A limit switch plate 119 is also arranged in or on the gear wheel of the pivot drive 11, which limit switch plate has a limit switch that is actuated when the output plate 112 reaches one of the two end positions, which are also shown in fig. 1a to 1c and 2a to 2c, respectively. A cam may be disposed on one of the bull gears 116 at a suitable location to actuate a limit switch of the limit switch plate 119.

In the exemplary embodiment, the adjusting unit 10 is shown by way of example in connection with a head section 3, which is pivotable relative to the back section 2. The adjusting unit 10 can likewise be used for adjusting another supporting part of the piece of seating furniture, for example an armrest. In that case, the side portions of the piece of seating furniture are body elements, with respect to which the armrests pivot.

List of reference numerals

1 seat furniture

2 back part

21 mounting block

3 head part

4 head part plate

10 adjusting unit

11 pivoting drive

12 Motor Unit

13 synchronizing shaft

131 axle seat

14 further pivoting drive

111. 141 carrier plate

112. 142 output board

113. 143 mounting bracket

114. 144 internal multiple teeth

115. 145 bearing plate

116. 146 big gear

116a, 146a drive the bull gears

116b,146b drive shaft

116c, 146c intermediate gear wheel

116d, 146d output gear wheel

116e, 146e output element

117. 147 casing

118. 148 rivet

118a, 148a gasket

119 limit switch board

121 electric motor

122 gear

123 hollow output shaft.