EP2297420A2

EP2297420A2 - Furniture drive

Info

Publication number: EP2297420A2
Application number: EP09765231A
Authority: EP
Inventors: Hansjörg BRAUNGART
Original assignee: Julius Blum GmbH
Current assignee: Julius Blum GmbH
Priority date: 2008-06-19
Filing date: 2009-04-17
Publication date: 2011-03-23
Anticipated expiration: 2029-04-17
Also published as: CN102066682A; WO2009152537A2; CN102066682B; WO2009152537A3; JP2011524479A; JP5731971B2; AT12708U1; EP2297420B1; AT507041A1

Abstract

The invention relates to a furniture drive (1) comprising an ejector (5) for ejecting a mobile furniture part from the closing position thereof, in or on a furniture body, and an energy accumulator (14) that can be charged by a drive unit (7) and discharged on the ejector (5) for ejecting the mobile furniture part. At least one electrical or electronic switching unit (15, 16) is provided for switching on and/or off the drive unit (7) and can be actuated by the ejector (5).

Description

furniture drive

The present invention relates in a first variant, a furniture drive, with an ejector for ejecting a movable furniture part from its closed position in or on a furniture body and a rechargeable by a drive unit energy storage, which discharges to eject the movable furniture part on the ejector, wherein at least one electrical or electronic switching unit is provided for switching on and / or off the drive unit.

A generic furniture drive is apparent, for example, from WO 2004/101919 A1.

Generic furniture drives allow the ejection of a movable furniture part by a power storage, but does not have to be charged manually. The energy accumulator is independent of the movable furniture part by a drive unit rechargeable.

A disadvantage of generic furniture drives is the fact that regardless of the installation situation of the furniture drive always an additional external, that is arranged outside the furniture drive, electrical or electronic switching unit is required to turn the furniture drive on or off.

In addition to the furniture drive is therefore in any case still mount a switching unit during assembly, which makes the installation longer and more complex.

The object of the invention is to develop a generic furniture drive such that basically no external switching units are needed.

This object is achieved by a furniture drive with the features of claim 1.

Because the ejector itself actuates the at least one switching unit, a separate external switching unit is not necessarily required per se. However, this can certainly be provided if an installation position for the inventive Furniture drive is selected, in which for turning on the drive unit is not enough way for the movable furniture part remains. The switching on of the drive unit should namely without the provision of separately operable by the user pushbuttons or the like can be done only by the fact that the furniture part by the user in its closed position something in the furniture body or possibly something is moved out of the furniture body, said movement of the furniture part is transferred to the ejector.

But even if due to the selected special installation position of the furniture drive according to the invention for switching on the drive unit, an external switching unit should be required, the advantage of the invention is still that this switching unit is only required for switching on the drive unit. Even in this case, namely, the switching off of the drive unit can be effected by the actuatable by the ejector switching unit of the furniture drive.

Of course, it is not necessary, depending on the desired installation position of the furniture drive, to provide various types of furniture drives available, which are provided on the one hand only with a switching unit or with two switching units. Instead, always the same furniture drive can be used, which has two switching units, wherein the one switching unit for switching on and the other switching unit is used to turn off. If an external switching unit is used due to the selected installation position, then one of the two internal switching units can remain inactive. Of course, it would also be conceivable always to provide only a single switching unit, via which the switching on and off of the drive unit of the furniture drive takes place. In this case, however, either provide a control for the furniture drive or it is even more complicated form the switching unit, since it must indeed cause both the switching on and off the drive unit.

Further advantageous embodiments of the invention are defined in the dependent claims.

A further variant of the invention relates to a furniture drive, in particular according to one of claims 1 to 11, with a displaceably mounted ejector for Ejecting a movable furniture part from its closed position in or on a furniture body, wherein the power is transmitted to the ejector via a drivable by the drive unit crank.

Such a furniture drive is apparent from WO 2004/101919 A1.

The furniture drive shown there is relatively large. A smaller size is obtained if, as in the second variant of the invention, it is provided according to the invention that the transmission of the rotary movement of the crank to the ejector takes place via a lever articulated on the crank and on the ejector.

Advantageously, it can be provided that a switching unit is provided for switching on and / or off the drive unit, which can be actuated by the lever.

In all its embodiments or variants, the furniture drive according to the invention is characterized in that the drive unit (for example, the electric motor) always has to rotate only in one direction, so that no motor driver is needed. It is also not necessarily a clutch necessary, so that the furniture drive according to the invention requires very few parts.

Particularly preferably, it can be provided that the energy storage device can be adjusted in its thickness over a certain range.

Further advantages and details of the invention will become apparent from the figures and the associated description of the figures. Showing:

Fig. 1 is a perspective view of a piece of furniture with a

Embodiment according to a first variant of a furniture drive according to the invention, Fig. 2a, 2b, the furniture shown in Fig. 1 with partially torn

Furniture carcass and in a detailed view,

Fig. 3a, 3b this furniture drive in two different operating positions, Fig. 4a to 4c perspective views of this furniture drive in two different

Operating positions as well as with mounted cover, Fig. 5a to 5c are plan views of this furniture drive with the cover removed in three different operating positions, Fig. 6 is a perspective view of a piece of furniture with a

Embodiment according to a second variant of a furniture drive according to the invention,

Fig. 7a, 7b, the furniture shown in Fig. 6 with partially torn

Furniture floor and a detailed view, Fig. 8a, 8b perspective views of this furniture drive in two different

Operating positions and Fig. 9a, 9b are plan views of this furniture drive according to FIGS. 8a, 8b.

Fig. 1 shows a possible installation position of the furniture drive 1 according to the invention on the furniture body 2 away from the hinges 4, about which the movable here as a furniture door furniture part 3 is pivotable.

Details of Fig. 1 can be seen in Figs. 2a and 2b.

The furniture drive 1 according to the invention itself is shown in more detail in FIGS. 3 to 5.

The top of the furniture drive 1 according to the invention is closed by a removable cover 8. Recognizable is a drive unit 7, which is formed in this embodiment as an electric motor.

The ejector 5 of the furniture drive 1 is designed here as an ejection lever, whose free end is provided with a roller 6. The roller 6 could also be omitted.

The principle of operation of the first embodiment of the furniture drive 1 according to the invention can be explained most simply with reference to FIGS. 5a to 5c.

5a shows a plan view of the furniture drive 1 according to the invention with the cover 8 removed. Visible is the drive unit 7 in the form of the electric motor, which drives a gearwheel 10 via a worm 9. Eccentrically on the gear 10, a driver 11 is arranged, depending on the angular position of the gear 10 with a Control cam 12, which is formed here on the ejector 5, cooperates. The ejector 5 is pivotally supported on the one hand about an axis 13 and on the other hand acted upon by a force accumulator 14, which is designed here in the form of two compression springs. The compression springs are arranged on guides.

Recognizable are further two electrical or electronic switching units 15, 16, wherein the one switching unit 16 when actuated, the drive unit 7 turns on and the other switching unit 15 when actuated, the drive unit 7 turns off. Both switching units 15, 16 are actuated by the ejector 5. The actuation takes place in the case of the switching unit 15 via a pin 17 arranged on the ejector 5. The switching unit 16 is actuated in this embodiment via the free end of the ejection lever or, more precisely, via the roller 6.

Subsequently, a complete working cycle of the furniture drive 1 according to the invention will be described by way of example with reference to FIGS. 5a to 5c.

In Fig. 5a, the furniture drive 1 is in the starting position, as shown for example in Figs. 1 and 2. In the installation position on the furniture body 2, the movable furniture part 3 would rest on the furniture body 2. Either by the slightly projecting roller 6 or by the provision of separate spring buffer is thereby ensured that even in the closed position of the movable furniture part 3, the movable furniture part 3 is still something in the direction of the furniture body 2 can be pressed so as to cause the release of the furniture drive 1 , If an unillustrated user now presses the furniture part 3 in the direction of the furniture body 2, this force is transmitted to the switching unit 16 via the roller 6. This triggers the drive unit 7, which actuates the gearwheel 10 via the spindle 9. The gear 10 begins to rotate in the counterclockwise direction, whereby the driver 11 is moved away from the control cam 12 of the ejector 5. This releases the ejector 5, which is pivoted out of the housing due to the application of force by the energy accumulator 14 in the counterclockwise direction.

Accordingly, Fig. 5b shows the ejector 5 in a partially pivoted out of the housing position. About the roller 6 while the movable furniture part 3 is pushed away from the furniture body 2. Depending on how strong the energy storage 14th is formed or set (namely, this can be mechanically changed in its strength in a certain range), the furniture part 3 is either only so far away from the furniture body 2, that a gap is formed, in which the user to further open the furniture part 3 intervene can or the furniture part 3 is transferred solely due to the exercise of force of the ejector 5 in the open position.

Depending on how fast the electric motor of the drive unit 7 rotates, it may be necessary to stop the drive unit 7 somewhat, for example in the position shown in FIG. 5 b, in order to prevent the driver 11 from coming into contact with the control cam 12 too early , However, this measure can be avoided if one either uses a correspondingly slowly rotating electric motor or provides a speed of the gear 10-reducing transmission, which would, however, be associated with additional costs.

In the position shown in Fig. 5c, the ejector 5 is in its maximum pivoted away from the housing position. The energy storage device 14 in the form of the two compression springs has been completely discharged. Now comes due to the continued rotation of the gear 10, the driver 11 in contact with the first portion of the control cam 12 and start to move the ejector 5 back into the housing. This return movement continues until the pin 17 comes to rest against the switching element 15 and actuates this. As a result, the drive unit 7 is deactivated and the furniture drive 1 is again in the starting position shown in Fig. 5a.

The charging of the force accumulator 14 by the drive unit 7 via the ejector 5, while it is moved back into the housing.

6 to 9 relate to an embodiment according to a second variant of the furniture drive according to the invention 1. In the installation position shown in Figs. 6 and 7 of the furniture drive 1, the furniture drive 1 is in the vicinity of the furniture part 3 stored hinges 4. Unlike illustrated, however, the second embodiment of the furniture drive 1 according to the invention could be mounted far away from the hinges, as shown in Figs. 1 and 2 for the embodiment of the first variant. As can be seen in FIGS. 6 and 7, the furniture drive 1 was arranged in a separate part of the furniture body 2. Recognizable is also an additional switching unit 18, whose importance will be discussed later.

The structure of the embodiment of the second variant of the furniture drive 1 according to the invention is very similar to that of the embodiment of the first variant, wherein like reference numerals designate like components. However, the second embodiment additionally has a gear 20 and the ejector 5 is designed here as a plunger. In addition, the second embodiment of the furniture drive 1 according to the invention comes with a single arranged in the housing of the furniture drive 1 switching unit 16, since the function of the additionally provided in the first embodiment switching unit 15 is met here by the external switching unit 18. By the gear 10 and the driver 11, a crank 10, 11 is formed.

The principle of operation will be explained with reference to FIGS. 9a and 9b.

In Fig. 9a, the furniture drive 1 according to the invention is in its initial position in which the furniture part 3 rests on the furniture body 2 with some play. Since the furniture drive 1, is arranged in the installation position shown in FIGS. 6 and 7 in the vicinity of the hinges 4, there is not enough clearance to effect the activation of the drive unit 7 via the ejector 5. Therefore, the switching unit 18 is here outside the housing of the furniture drive 1 remote from the hinges 4 and connected via lines not shown with the drive unit 7. Now, if the furniture part 3 is pressed something by a user, not shown in relation to the furniture body 2, this is detected by the switching unit 18 and this triggers the drive unit 7 from. This causes the spindle 9 to start rotating. This rotational movement is transmitted via the gear 20 to the gear 10. In this embodiment, the driver 11 is coupled to the ejector 5 via a lever 22 and a hinge 23. The gear 10 begins to rotate in the counterclockwise direction, whereby the plunger of the ejector 5 is moved out of the housing of the furniture drive 1. This pushes the furniture part 3, as already described for the embodiment of the first variant. Fig. 9b shows the ejector 5 in its maximum moved out of the housing position. With continued rotation of the gear 10, the ejector 5 is moved back into the housing and indeed until the gradation 21 of the rod 22 comes to rest against the switching unit 16. Upon actuation of the switching unit 16, the drive unit 7 is turned off and the furniture drive 1 is again in its starting position shown in FIG. 9a.

Differently than shown, could be provided in both variants of the invention instead of the gear 10, any wheel which is driven by a corresponding drive from the drive unit 7. For example, instead of the gear, a friction wheel could be provided. The spindle 9 would of course be replaced in this case by a corresponding drive mechanism for the friction wheel.

Claims

Patent claims

1. Furniture drive, with an ejector for ejecting a movable furniture part from the closed position in or on a furniture body and a rechargeable by a drive unit energy storage, which discharges to eject the movable furniture part on the ejector, wherein at least one electrical or electronic switching unit for on and / or switching off the drive unit is provided, characterized in that the at least one switching unit (15, 16) by the ejector (5) is actuated.

2. Furniture drive according to claim 1, characterized in that the force accumulator (14) in the charged state by the drive unit (7) can be locked.

3. Furniture drive according to claim 1 or 2, characterized in that the

Drive unit (7) via the ejector (5) with the force accumulator (14) cooperates.

4. Furniture drive according to claim 3, characterized in that by the drive unit (7) drivable carrier (11) is provided which at least for charging the energy accumulator (14) with the ejector (5) cooperates.

5. Furniture drive according to claim 4, characterized in that the ejector (5) or coupled thereto, a control cam (12) for the driver (11) is provided.

6. Furniture drive according to claim 4, characterized in that the driver (11) via a lever (22) with the ejector (5) is coupled.

7. Furniture drive according to one of claims 4 to 6, characterized in that the driver (11) is arranged eccentrically on a by the drive unit (7) drivable wheel, preferably gear (10) or friction wheel, wherein preferably the wheel part of one of Drive unit (7) downstream transmission (20) ..

8. Furniture drive according to one of claims 1 to 7, characterized in that the ejector (5) has a pivotally mounted ejection lever.

9. Furniture drive according to one of claims 1 to 7, characterized in that the ejector (5) has a linearly movable plunger.

10. Furniture drive according to one of claims 1 to 9, characterized in that the drive unit (7) has an electric motor.

11. Furniture drive according to one of claims 1 to 10, characterized in that the force accumulator (14) has at least one coil spring.

12. Furniture drive, in particular according to one of claims 1 to 11, with a displaceably mounted ejector for ejecting a movable furniture part from its closed position in or on a furniture carcass, wherein the

Power transmission to the ejector via a driven by the drive unit crank, characterized in that the transmission of the rotational movement of the crank (10, 11) on the ejector (5) via a hinged to the crank (10, 11) and the ejector (5 ) mounted lever (22) takes place.

13. Furniture drive according to claim 12, characterized in that a switching unit (16) for switching on and / or off of the drive unit (7) is provided, which by the lever (22) can be actuated.