阅读说明：本技术 具有弹簧引导器的执行臂驱动器 (Actuator arm driver with spring guide ) 是由 B·克拉默尔 于 2020-02-06 设计创作，主要内容包括：本发明涉及一种用于驱动家具(200)的可运动地支承的家具部件(101)的执行臂驱动器(100),其具有至少一个组件,所述组件包括压缩弹簧(2)和用于引导压缩弹簧(2)的至少一个引导装置(3),其中,所述至少一个引导装置(3)具有至少部分地可变的直径,以便在压缩弹簧(2)受载荷时在考虑到压缩弹簧(2)的直径变化的情况下补偿在压缩弹簧(2)与引导装置(3)之间的径向间隙。(The invention relates to an actuating arm drive (100) for driving a movably mounted furniture part (101) of a piece of furniture (200), comprising at least one assembly comprising a compression spring (2) and at least one guide device (3) for guiding the compression spring (2), wherein the at least one guide device (3) has an at least partially variable diameter in order to compensate for a radial play between the compression spring (2) and the guide device (3) when the compression spring (2) is loaded, taking into account the change in diameter of the compression spring (2).)

1. Actuating arm drive (100) for driving a movably mounted furniture part (101) of a piece of furniture (200), having at least one assembly comprising a compression spring (2) and at least one guide device (3) for guiding the compression spring (2),

characterized in that the at least one guide means (3) has an at least partially variable diameter in order to compensate for a radial play between the compression spring (2) and the guide means (3) taking into account the change in diameter of the compression spring (2) when the compression spring (2) is loaded.

2. Actuator arm drive according to claim 1, characterized in that the guide means (3) are configured as a sleeve.

3. The actuator arm drive of claim 2, wherein the sleeve is slotted in an axial direction.

4. Actuator arm drive according to any of claims 1 to 3, characterized in that the guide means (3) have a pretension in the radial direction.

5. Actuator arm drive according to any of claims 1 to 4, characterized in that the outer diameter of the guide means (3) is between 0.01mm and 0.3mm, preferably between 0.05mm and 0.1mm larger than the smallest inner diameter of the compression spring (2) in the non-pretensioned position.

6. Actuator arm drive according to any of claims 1 to 5, characterized in that the at least one guide means (3) is at least partially arranged in the interior of the compression spring (2).

7. Actuator arm drive according to any of claims 1 to 5, characterized in that the at least one guide means (3) at least partially surrounds the compression spring (2).

8. Actuator arm drive according to any of claims 1 to 7, characterized in that a stabilizing device (4) is provided within the at least one guide device (3) or within the compression spring (2).

9. Actuator arm drive according to any of claims 1 to 8, characterized in that the guide means (3) is made of thermoplastic, preferably polyoxymethylene.

10. Actuator arm drive according to any of claims 1 to 9, characterized in that three spring guides (1) are provided.

11. An item of furniture (200) having at least one actuating arm drive (100) according to one of claims 1 to 10 and a furniture part (101) mounted movably on the actuating arm drive.

Technical Field

The invention relates to an actuating arm drive for driving a movably mounted furniture part of a piece of furniture, having at least one assembly comprising a compression spring and at least one guide device for guiding the compression spring.

Background

Actuating arm drives are known from the prior art, which have a compression spring and at least one guide device for preventing a bending movement of the compression spring when the compression spring is compressed. Here, the guide means arranged in the interior of the compression spring are also known, for example in the form of a rod arranged in the interior space formed by the compression spring. It is also known to design the guide in the form of a sleeve surrounded by a compression spring.

A disadvantage of the actuating arm drives known from the prior art with a guide device as described above is that such a guide device has to be designed for the smallest inner diameter or the largest outer diameter of the compression spring. If the compression spring is now loaded, the inner diameter of the compression spring or the outer diameter of the compression spring becomes larger and a radial gap exists between the compression spring and the guide.

This allows the compression spring to perform a small bending movement until it comes into contact with the guide when compressed. Such "contact" leads to a very disturbing noise during the use of such spring guides and to increased wear on the guide.

Disclosure of Invention

The object of the present invention is therefore to provide a spring guide which is improved over the prior art, and an actuating arm drive having at least one such spring guide, and a piece of furniture having at least one such actuating arm drive.

This object is achieved by an actuator arm drive having the features of claim 1 and by an item of furniture having the features of claim 11. Advantageous embodiments of the invention are defined in the respective dependent claims.

It is therefore provided that the at least one guide has an at least partially variable diameter in order to compensate for the radial play between the compression spring and the guide when the compression spring is loaded, taking into account the change in diameter of the compression spring.

The guide device can thus always rest against the compression spring without play over its entire length and in all positions of the compression spring which are produced by different loads on the compression spring. The guide can thus support the compression spring in all positions of the compression spring against longitudinal bending of the compression spring, whereby the severe disturbing noises occurring in the prior art during the use of such a spring guide and increased wear on the guide can be prevented.

In other words, the guide thus always bears against the compression spring without play and thus prevents longitudinal bending and the associated noise which is very disturbing.

The efficiency of the spring guide can also be optimized in that a substantially linearly extending compression and/or expansion movement of the compression spring, i.e. a compression or expansion movement of the compression spring extending without longitudinal bending, can be achieved.

Manufacturing-related tolerances of the diameter of the compression spring can also be compensated by the preloaded play-free abutment of the guide device.

A piece of furniture having at least one such actuating arm drive and a furniture part mounted movably on the actuating arm drive is also specified.

In this case, it can be provided that the guide device is designed as a sleeve. This enables a material-saving and therefore cost-effective production of the guide device in comparison with guide devices, which are designed, for example, as rods.

In particular, it can be provided that the guide device, which is designed as a sleeve, is slotted in the axial direction and is prestressed in the radial direction. By means of this configuration of the guide, a guide with a variable diameter can be provided in a simple manner.

In order to achieve this pretensioning, it can be provided that the outer diameter of the guide device in the non-pretensioned position is between 0.01mm and 0.3mm, preferably between 0.05mm and 0.1mm, larger than the smallest inner diameter of the compression spring.

It may be advantageous here for the at least one guide means to be arranged at least partially in the interior of the compression spring. This has the advantage that there is less material and space requirement than an externally located guide, since the guide is smaller in diameter and is arranged within the compression spring.

However, it can also be provided that the at least one guide at least partially surrounds the compression spring.

It may also be advantageous to provide a stabilizing device within the at least one guide device or within the compression spring. This additionally stabilizes the compression spring and also more reliably prevents longitudinal bending of the compression spring.

Provision can be made for the guide means to be made of a thermoplastic, preferably polyoxymethylene. The use of said material enables a simple and cost-effective production of the guide device. Furthermore, wear of the guide means and noise generation when the compression spring is loaded are reduced due to the good sliding properties of the material.

In principle, however, all suitable materials, for example different metals or other plastics, are conceivable.

Drawings

Further details and advantages of the invention are explained in more detail below with reference to the exemplary embodiments shown in the figures by means of the drawing description. In the drawings:

fig. 1 shows a piece of furniture according to the invention in a perspective side view;

FIG. 2 shows a perspective side view of an actuator arm drive according to the present invention with the housing cover removed;

FIG. 3 shows an exploded view of the accumulator;

figure 4a shows a perspective view of a guide device according to the invention;

figure 4b shows a front view of the guiding device according to the invention;

fig. 5a shows a schematic cross-sectional view of a spring guide according to the invention in a first position;

fig. 5b shows a schematic cross-sectional view of a spring guide according to the invention in a second position;

fig. 5c shows a schematic cross-sectional view of a spring guide according to the invention in a third position;

fig. 6a shows a schematic view of a spring guide according to the invention in a first position in different views;

fig. 6b shows a schematic view of a spring guide according to the invention in a second position in a different view;

fig. 6c shows a schematic view of a spring guide according to the invention in a third position in a different view;

fig. 7a shows a schematic view of another embodiment of a spring guide according to the invention in a first position in different views;

FIG. 7b shows a schematic view of another embodiment of a spring guide according to the invention in a second position in a different view; and

fig. 7c shows a schematic view of another embodiment of the spring guide according to the invention in a third position in a different view.

Detailed Description

Fig. 1 shows a perspective view of a piece of furniture 200 with an actuating arm drive 100 which fits into the interior of the piece of furniture 200 and a movably mounted furniture part 101 which is driven by the actuating arm drive and which is designed as a fold-up flap as depicted. The furniture part 101 can also be designed, for example, as a flip-up door cover, in contrast to the illustration. Furthermore, the actuating arm 102 and the fitting 103 can be seen.

Fig. 2 shows a perspective view of actuator arm drive 100 with the housing cover removed from the housing. In order to connect the actuator arm drive 100 to the furniture part 101 to be moved, the actuator arm drive 100 has a fastening point 105 for the actuator arm 102. In order to apply force to the actuating arm 102, the actuating arm drive 100 also has an energy store 104 in the form of a spring pack, which acts on the actuating arm 102 as shown via a transmission mechanism having a plurality of levers.

The energy store 104 is shown exploded in fig. 3. The energy accumulator has two base parts 6, 7 which are movable relative to one another, wherein, in the embodiment shown, the second base part 7 is pivotably mounted on the housing and the first base part 6 interacts directly with the transmission mechanism. The springs 2 of the accumulator 104 are arranged parallel to each other with respect to their longitudinal axis. This illustration essentially corresponds to a defined installation position of the actuating arm drive 100 in the piece of furniture 200, in which the spring 2 (or the longitudinal axis of said spring) is arranged essentially horizontally extending or lying. For guiding the spring 2, the energy accumulator 104 has a guiding device 3 according to the invention, which is arranged in the interior of the spring 2. A guide rod 5 is provided for guiding the two base parts 6, 7 to each other.

Fig. 4a shows a perspective view of the guide device 3 according to the invention, and fig. 4b shows a front view of the guide device 3 according to the invention. It can be seen that the guide means 3 are configured as a sleeve. However, other suitable embodiments are also contemplated.

It can also be seen that the guide 3 has a slot 8 in the axial direction over its entire length. The slot 8 serves to enable the diameter of the guide 3 to be varied.

The guide device 3 is prestressed in the radial direction. In order to achieve this pretensioning, the outer diameter of the guide device 3 is at a minimum greater than the minimum inner diameter of the compression spring 2. Preferably, the outer diameter of the guide means in the non-pretensioned position is between 0.01mm and 0.3mm, preferably between 0.05 and 0.1mm, larger than the smallest inner diameter of the compression spring.

The function of the spring guide 1 according to the invention shall now be explained with the aid of fig. 5a to 5 c. In fig. 5a, the spring 2 is in a state of being loaded to the maximum possible. The inner diameter of the spring 2 is largest in this state. It can be seen that the guide has a larger diameter due to its pretensioning and therefore again bears completely against the compression spring 2.

In fig. 5b the spring 2 is loaded, whereby its inner diameter increases. Due to the pretensioning of the guide means 3, the guide means expands in the radial direction and thus its outer diameter increases. The guide device 3 thereby continues to bear completely against the compression spring 2 and is able to guide it sufficiently and support it against longitudinal bending. It can also be seen that the slot 8 has been enlarged in order to compensate for the change in diameter of the guide means.

In fig. 5c, the compression spring 2 is in an unloaded position, i.e. it is not compressed. The spring guide 3 is prestressed and rests with its entire outer circumference against the compression spring 2 without play.

The diameter of the guide 3 changes smoothly, so that the guide completely rests against the compression spring 2 in any state of the compression spring 2 and at any time. Thereby, the compression spring 2 is sufficiently guided and supported against longitudinal bending at any time and in any state of the compression spring 2

For a better understanding of the invention, fig. 6a to 6c again show the spring guide according to the invention in two views in different positions and the position of the movable furniture part corresponding to the position of the spring guide.

In fig. 6a, the movable furniture part 101 is in the closed position. In the closed position, the spring 2 is maximally compressed and therefore has the largest diameter and the smallest length. The guide device 3 expands due to its prestressed construction and rests without play against the compression spring 2. The slot 8 is largest in this position of the spring guide.

Fig. 6b shows the spring guide during the opening or closing process of the movable furniture part 101. It can be seen that the spring 2 is compressed. Thus, the spring 2 has a larger diameter and a shorter length in this position than in the uncompressed position of the spring 2. The guide device 3 expands due to its prestressed construction and rests without play against the compression spring 2. The slot 8 is larger in this position of the spring guide than in the uncompressed position of the spring 2.

In fig. 6c, the movable furniture part 101 is in the open position. In the open position, the spring 2 is uncompressed and therefore has a minimum diameter and a maximum length. The guide device 3 rests against the compression spring 2 without play due to its prestressed design. The slot 8 is smallest in this position of the spring guide.

Fig. 7a to 7c show a further exemplary embodiment of the spring guide according to the invention in different positions and in two views, the positions of the movable furniture part corresponding to the positions of the spring guide.

Fig. 7a to 7c correspond to a large extent to fig. 6a to 6 c. However, in the embodiment of fig. 7a to 7c, a stabilizing device 4 is provided. The stabilizing device 4 is arranged in the interior of the guide device 3.

It can be seen that in the uncompressed position of the spring 2 (the spring 2 therefore has the smallest diameter), the guide 3 rests against the stabilization device 4 in fig. 6 c. If the spring 2 is compressed (fig. 6b and 6a), the guide 3 expands according to the change in diameter of the spring 2 and rests against said spring without play. The guide device 3 is lifted from the stabilization device 4.

List of reference numerals

1 spring guide

2 compression spring

3 guide device

4 stabilizing device

5 guide rod

6 first base part

7 second base part

8 slot

100 actuator arm driver

101 furniture parts

102 executing arm

103 fittings

104 energy accumulator

105 fixed position

200 furniture