Damper for self-closing device of movable furniture

Abstract

The invention relates to a damper for a self-closing device of furniture, comprising a housing (1) in which a piston (2) having a piston rod (3) and a piston head (4) is held so as to be displaceable in the axial direction, the piston rod (3) being connectable to the self-closing device by means of a connecting element (5) provided at the end opposite the piston head (4), the damper is designed in such a way that in the end region of the connecting element (5) of the piston rod (3) of the housing (1) there is an inserted sleeve (10) which is locked to the housing (1), which sleeve circumferentially surrounds the piston rod (3) and forms a locking connection to the self-closing device.

Description

TECHNICAL FIELD

[0001] The invention relates to a damper for a self-closing device of a movable furniture component. BACKGROUND

[0002] Such dampers are known as components of self-closing mechanisms. Self-closing mechanisms are for example held on a pull-out guide by means of which two furniture components can be moved relative to one another into an end position.

[0003] In order to provide different self-closing devices, each of which corresponds to different requirements, a large number of different self-closing devices, in particular with different dampers, are provided, which naturally entails considerable expenditure in production and storage. In any case, this involves considerable costs, which conflict with the continuing demand for cost minimization.

[0004] In addition, the known dampers are each designed with connection dimensions that are specific to a particular self-closing device, so that a large number of such self-closing devices and dampers must be kept in stock. In addition, the connection to the pull-out guide can only be achieved with considerable expenditure.

[0005] Dampers of this type are for example disclosed in US 2011 / 0278117 A1. This fluid damper is designed in such a way that the volume compensation is not possible permanently, but only at the end of the damping.

[0006] Dampers of the same type are also discussed in EP 4 178 395 B1. SUMMARY

[0007] It is an object of the present invention to further develop the damper of the type mentioned at the outset in such a way that its range of application is expanded and its manufacturing and installation costs are reduced.

[0008] This object is achieved by a damper according to one aspect of the invention.

[0009] First of all, it should be emphasized that, as a particular advantage, the number of damper variants used can be reduced. On the manufacturing-technical side, existing equipment on the production side can be used, so that no additional machine investments are necessary for the manufacture of the damper.

[0010] Functionally, the sleeve serves both to close the damper and as an interface to the existing self-closing device, in particular to the pull-out guide, which ensures that existing dampers can be used without the components involved having to be changed when the damper is installed.

[0011] A secure connection is achieved by locking the sleeve onto the housing. On the outside of the sleeve, a latching tongue can be formed, which engages in a corresponding recess in the housing. This means that the sleeve can be inserted very easily into the housing, while the sleeve can only be pulled out of the housing with considerable force.

[0012] Now, the new damper can be used without any structural changes to the self-closing device, so that the new damper can be installed without changing the components involved, which are usually already present.

[0013] The interior of the sleeve is designed in such a way that the corresponding elements of the self-closing device can be inserted and also secured in place by locking means. These locking means can be designed similarly to the locking means for holding the sleeve in the housing.

[0014] The new damper is manufactured in such a way that the sleeve can be inserted completely automatically into the damper housing, which naturally leads to further cost advantages over the dampers known from the prior art.

[0015] A particularly important advantage is that the dampers are used in large numbers as series components for self-closing devices.

[0016] According to a further idea of the application, the axially displaceable piston in the damper is held in the housing in a rotationally fixed manner, the housing being preferably cylindrical and having a closed bottom opposite the sleeve.

[0017] In order to prevent the piston from rotating, the inner surface of the housing is profiled in cross section, while the piston head resting on the inner surface has a matching profile on the outside.

[0018] The profile can be formed, for example, by providing the inner surface of the housing with axial webs, which fit into corresponding longitudinal recesses in the piston head.

[0019] It is also conceivable for an internal profile to result in a non-circular inner surface of the housing and a matching outer surface of the piston head.

[0020] This shape can be observed, for example, in cross section as a flattened area, which exists as a recess in the inner surface of the housing and as a web on the outer surface of the piston head.

[0021] Further advantageous embodiments of the application are a further aspect of the application. BRIEF DESCRIPTION OF DRAWINGS

[0022] Examples of embodiments of the application are described below with reference to the accompanying drawings.

[0023] In the drawings:

[0024] Figure 1A side sectional view of the damper according to the present invention is shown.

[0025] Figure 2 Showing according to Figure 1 Exploded view of the damper.

[0026] Figure 3 A perspective view showing details of the damper.

[0027] Figure 4 A front view of a portion of the damper is shown.

[0028] Figure 5 Show Figure 4 A perspective view of a portion of the damper shown.

[0029] Figures 6a to 6d The assembly steps of the damper according to the invention on a self-closing device are shown.

[0030] Figure 7 The longitudinal section of the self-closing device with a damper in the sleeve region is shown. Detailed Implementation

[0031] Figure 1 and Figure 2 A damper for a self-closing device 14 (Fig. 6) for furniture is shown, having a housing 1 in which a piston 2 is held so that it can be axially displaced.

[0032] The piston 2 has a piston rod 3 and a piston head 4, as well as a connecting element 5 on the side opposite to the piston head 4, which is connected to the actuator of the self-closing device 14 in the installation position.

[0033] According to the present invention, a sleeve 10, which is locked to the housing 1, is inserted into the end region of the connecting element 5 facing the piston rod 3 in the housing 1, and the sleeve circumferentially surrounds the piston rod 3.

[0034] In order to lock the sleeve 10 to the housing 1, the sleeve 10 has a harpoon-shaped latch tongue 11 that engages in a corresponding recess on the inner surface of the housing 1, so that the sleeve 10 is fixed in the opposite direction to the insertion direction, while the sleeve 10 can be easily inserted into the housing 1.

[0035] The deflection of the latch tongue 11 is supported by a material weakening portion in the sleeve 10, which in this example is supported by an axially extending recess 16. After assembly onto the self-closing device 14, the spring action is canceled by inserting the connecting bushing 15, so that the sleeve 10 can no longer be released from the housing 1.

[0036] To compensate for the volume of the piston rod 3, a seal 8 with a pressure spring 6 is provided. This seal is supported on one side on the bottom area of ​​the sleeve 10 away from the connecting element 5, and on the other side on the guide element 7 of the piston rod 3.

[0037] To restrict the insertion of the sleeve 10 into the housing 1, the sleeve 10 has a radially outwardly pointing circumferential collar 12, which is supported on the corresponding end face of the housing 1.

[0038] exist Figure 3 Details of the individual sleeve 10 can be seen, which clearly shows the arrangement and construction of the latch tongue 11.

[0039] exist Figure 4 and Figure 5 The piston head 4 shown in detail has a web 13 on its outer surface, which is supported on the inner surface of the housing 1, thereby reducing the drift and deflection of the piston 2.

[0040] In the example shown, the shape of the surface of the piston head 4 can also be designed differently.

[0041] The valve plate 9 is arranged in the axial direction downstream of the piston rod 3 and the piston head 4 on the extension of the piston head 4, which controls the volumetric flow rate when the damper is actuated.

[0042] Figure 6 illustrates the assembly steps for installing the damper 10 and the self-closing device 14 in the order of steps a to d. It can be seen that the connecting bushing 15 of the self-closing device 14 is inserted into the sleeve until it reaches... Figure 6d The end position shown is where the connecting bushing is locked to the sleeve 10.

[0043] The connecting bushing 15 has a locking element for securing it, which engages in the latch opening 17 of the sleeve 10. A gap below or inside the latch tongue 11, or a latch opening offset from the latch tongue 11 on the sleeve 10, can be used for this purpose.

[0044] Figure 7 The damper 10 is shown connected to the self-closing device 14 in its functional position, corresponding to Figure 6d The final assembly position is shown in the diagram.

[0045] It should be noted that sleeve 10 can be used to bridge the diameter difference between the connecting bushing 15 of housing 1 and self-closing device 14.

[0046] This means that a larger damper can also be used in a smaller self-closing device 14. The sleeve 10 forms the cover of the damper and serves as a universal adapter, meaning that the self-closing device can be customized at the end of assembly.

[0047] List of reference numerals

[0048] 1. Shell

[0049] 2 pistons

[0050] 3 Piston rod

[0051] 4 Piston Head

[0052] 5 Connecting elements

[0053] 6. Compression Spring

[0054] 7. Guide elements

[0055] 8. Seals

[0056] 9 Valve Plate

[0057] 10 sleeves

[0058] 11. Latch tongue

[0059] 12-shaft collar

[0060] 13. Web

[0061] 14 Self-closing device

[0062] 15 Connecting bushing

[0063] 16 recess

[0064] 17. Latch opening.

Claims

1. Damper for a self-closing device (14) of a movable piece of furniture, having a housing (1) in which a piston (2) with a piston rod (3) and a piston head (4) is held axially displaceable, the piston rod (3) being connectable to the self-closing device (14) by means of a connecting element (5) arranged at the end opposite the piston head (4), characterized in that A sleeve (10) which is locked to the housing (1) is inserted into an end region of the housing (1) facing the connecting element (5) of the piston rod (3), which sleeve (10) circumferentially surrounds the piston rod (3) and forms a locking connection to the self-closing device (14).

2. Damper according to claim 1, characterized in that The sleeve (10) has a locking element which engages in a locking recess of the housing (1).

3. Damper according to claim 1 or 2, characterized in that The locking element is designed as a latching tongue (11) which engages in a locking recess of the housing (1) such that the sleeve (10) is fixed in a direction opposite to the insertion direction.

4. The damper of claim 3, wherein The latching tongue (11) is designed in the form of a harpoon-shaped strut.

5. Damper according to any of the preceding claims, characterized in that A connecting bushing (15) of the self-closing device is arranged in the sleeve (1) and is preferably locked to the sleeve (1).

6. Damper according to any of the preceding claims, characterized in that The sleeve (10) has a material weakening, preferably a recess (16).

7. Damper according to any of the preceding claims, characterized in that The sleeve (10) has a latching opening (17) into which a locking element of the connecting bushing (15) engages.

8. Damper according to any of the preceding claims, characterized in that The material weakening is arranged in or offset from the coverage area of the latching tongue (11).

9. Damper according to any of the preceding claims, characterized in that A pressure spring (6) is provided which is supported on one side on a guide element (7) and on the other side on a facing bottom of the sleeve (10).

10. Damper according to any of the preceding claims, characterized in that A seal (8) is provided on the piston rod (3) on a side of the guide element (7) facing away from the pressure spring (6).

11. Damper according to any of the preceding claims, characterized in that The piston head (4) and / or the inner sleeve of the housing (1) has a non-circular cross section.

12. Damper according to any of the preceding claims, characterized in that The sleeve (10) has a circumferential collar (12) which extends radially outward on its end face opposite the pressure spring (6).

13. Damper according to any of the preceding claims, characterized in that The piston head (4) has a circumferentially axially extending web or flat portion.

14. A self-closing device (14) for a movable furniture part, having a damper according to any one of the preceding claims.

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