EP2797460B1 - Drive device for a movable furniture component - Google Patents

Description

The invention relates to a drive device with the features of the preamble of claim 1. In addition, the invention relates to a piece of furniture with a furniture body and a movable furniture part, wherein the movable furniture part is movable by such a drive device.

In furniture construction, especially in Beschlägebau, a variety of tools and methods have been known for many years to facilitate the opening and closing of the movable furniture parts for a user of furniture. Thus, opening devices (so-called ejection devices or touch-latch mechanisms) have been known for many decades, in which the movable furniture part is ejected and thus opened by pressing on the movable furniture part.

In order not only to facilitate the opening movement for a user, retractors are also known for many years, especially in the last part of the closing path to draw the drawer by itself. This guarantees a safe closing of the movable furniture part. In addition, damping devices are used to prevent excessive impact of a drawer to a strong impact and thus to avoid damage.

A fundamental problem with drive devices or furniture with ejection device and retraction device is that the forces of the respective energy accumulator for ejecting or for retracting counteract each other. That is, it must be ensured by appropriate mechanical means that on the one hand a secure locking is given and on the other hand, each of the right energy storage at the right time and in the right section acts. An important aspect in this technical field is also where and by whom the respective energy store (spring) is tensioned or charged. In many cases, the ejection energy storage is by the Operator loaded, for example, when opening or closing the drawer. For loading the Einziehakraftspeichers also the user can apply the necessary clamping force on the drawer itself or the Einziehkraftspeicher is tensioned by the ejection energy storage itself, as this has a greater energy (spring force) than the Einziehkraftspeicher.

An example of a pull-in spring, which is tensioned when opening by the ejection spring is in the DE 198 23 305 A1 shown. The tensioning of the recoil spring by hand, for example, in the DE 20 2009 009 566 U1 In these two devices, the ejection spring is tensioned each time when closing by hand.

A variant in which only one spring acts both as an ejection spring and as a retraction device, is in the WO 2011/143682 shown.

In addition, the invention provides that the ejection energy storage can be loaded by the Einziehkraftspeicher when pulling the movable furniture part. That is, there must be no manual loading of the ejection force accumulator, but the Einziehkraftspeicher is dimensioned and arranged so that the ejection energy storage is stretched when pulling the drawer. A corresponding device goes out of the WO 2010/009780 A1 after which the ejector (electric motor) is charged by the spring of the self-closing mechanism.

The object of the present invention is to provide an alternative or improved drive device for a movable furniture part compared to the prior art. In addition, the design and arrangement of the energy storage should be as compact as possible. Furthermore, the spring force should be used as efficiently as possible.

This is achieved for a drive device with the features of the preamble of claim 1, characterized in that the Einziehkraftspeicher on the one hand on Einziehschlitten and on the other hand is attached to the ejection slide, which is movable in the opening direction by the Einziehkraftspeicher the movable furniture part, so that the Einziehkraftspeicher acts with a portion of its energy as a support force memory for ejecting the movable furniture part.

In such an embodiment, the ejection force accumulator is equipped with less force than the Einziehkraftspeicher. Thus, the Einziehkraftspeicher serves on the one hand for feeding and on the other hand also for ejecting the movable furniture part.

According to a first variant of the present invention, it is provided that only by the ejection force memory, the movable furniture part from the closed position is movable into an open position. That is, the ejection force memory itself moves the movable furniture part from its closed position. As a result, the opening movement can then be provided that the movable furniture part is movable from an open position into a further open position by acting as Stützungskraftspeicher Einziehkraftspeicher.

In contrast, according to a second variant of the present invention, provision can be made for the movable furniture part to be moved from the closed position into an open position only by virtue of the support force memory. That is, the ejection force memory is not used for the immediate ejection of the movable furniture part from the closed position. Rather, the movable furniture part can be moved or ejected from an open position into a further open position by the ejection force accumulator.

In general, it can not be ruled out that the individual tensioning paths or expansion paths of the force accumulators overlap. Preferably, however, is provided for the best possible power transmission, that the movable furniture part when ejecting serially successively by the ejection energy storage and the Support power storage is movable. As can be seen from the variants described above, when ejecting the ejection force memory can act first and then the support force memory or vice versa.

Preferably, it may further be provided that at least one, preferably both, energy accumulators are designed as springs, preferably as compression springs. As a spring can also be understood a spring package, wherein the individual springs of a spring package have the same clamping or- relaxing section and the same starting and end points of the respective tensioning or expansion section. For this purpose, it is preferably provided that the spring constant of the ejection force accumulator is less than the spring constant of the Einziehakraftspeichers. That is, in the tensioned state of both energy storage, the spring force of Einziehkraftspeichers is higher than the spring force of the ejection force accumulator. After the Einziehkraftspeicher has delivered at least a portion of its energy, the ejection force accumulator on the higher spring force than the remaining spring force in Einziehkraftspeicher and can thus act on the movable furniture part (see, for example Fig. 3P and Fig. 3Q ).

According to the invention, the drive device, preferably arranged on a furniture body, housing, acted upon by Einziehkraftspeicher Einziehschlitten which along a slide track in or on the housing movable and in a locking position in, preferably a curved portion, the slide track is locked, and one of the ejection force memory acted upon ejection slide, along a Ausstoßkulissenbahn in or on the housing movable and in a locking position in, preferably a heart-curved portion, the ejection track is locked on. By such a housing with slide and slide tracks a compact design of the drive device is guaranteed.

It is particularly preferred for this purpose that the Einziehschlitten and the ejection slide are serially movable in succession along the housing. Through this serial circuit is given a compact, narrow and well integrable in a pull-out drive device. Preferably, it is further provided that the ejection force accumulator is attached on the one hand to the housing and on the other hand on the Einziehschlitten.

In principle, it is possible that the drive device is arranged on the movable furniture part and thus moves along with the movable furniture part. It can, so to speak, repel itself or move in with the furniture body arranged drivers. But it can also be provided that the Einziehschlitten and Ausziehschlitten sections with, preferably arranged on the movable furniture part, drivers are coupled. That is, the drivers are arranged on the movable furniture part and are partially or temporarily coupled with the Einziehschlitten or Ausziehschlitten such that the corresponding movement transfer is ensured for drawing or ejection to the movable furniture part.

In order to guarantee a safe and smooth closing of the movable furniture part at the end of the closing path, a damping device is preferably provided for damping the retraction movement of the movable furniture part triggered by the retracting energy accumulator.

Protection is also desired for a piece of furniture with a furniture body and a furniture part movable by means of a drive device according to the invention.

Fig. 1

schematisch ein Möbel mit einem offenen und einem geschlossenen bewegbaren Möbelteil,

Fig. 2A bis 2R

schematisch eine erste Variante eines Ablaufs einer Schließ- und Öffnungsbewegung und

Fig. 3A bis 3R

schematisch eine zweite Variante eines Ablaufs einer Schließ- und Öffnungsbewegung eines bewegbaren Möbelteils.

Further details and advantages of the present invention will be explained in more detail below with reference to the description of the figures with reference to the exemplary embodiments illustrated in the drawings. Show:

Fig. 1

schematically a piece of furniture with an open and a closed movable furniture part,

Fig. 2A to 2R

schematically a first variant of a sequence of closing and opening movement and

FIGS. 3A to 3R

schematically a second variant of a sequence of closing and opening movement of a movable furniture part.

Fig. 1 shows a piece of furniture 19, consisting of a furniture body 8 and two movable furniture parts 2 (drawers). These movable furniture parts 2 consist of a drawer 20 and a front panel 21 and are movably supported via a drawer rail 22 on a carcass-resistant carcass rail 23 - which together form the pull-out guide 24. On the drawer 20 (or on the drawer rail 22) drivers 16 and 17 are arranged, which correspond in sections with a arranged on the body 8 and on the carcass rail 23 drive device 1. This drive device 1 has a housing 9, in or on which an ejection slide 10 and a Einziehschlitten 13 are movably mounted. Between the ejection slide 10 and the Einziehschlitten 13 Einziehkraftspeicher 5 is arranged. In contrast, between the Einziehschlitten 13 and the housing 9 of the ejection force accumulator 3 is mounted. The upper of the illustrated drawers is located in a further open position OS1, while the lower of the illustrated drawers is in the closed position SS.

In Fig. 2A are shown in detail the individual components of a drive device 1. To this drive device 1 include on the one hand arranged on the movable furniture part 2 driver 16 and 17 and on the other hand arranged on the housing 9 components. These components are on the one hand the Einziehkraftspeicher 5 (which also acts as a support force memory 7), which together with the Einziehschlitten 13 and the slide track 14 together with curved portion 15 forms the retraction device 6. On the other hand, the ejection force memory 3 forms with the ejection slide 10 and the Ausstoßkulissenbahn 11 together with the heart-shaped portion 12, the ejection device 4. According to the Fig. 2A is the movable furniture part in a further open position OS1. The tilted Einziehschlitten 13 is located in the locking position VE in the bent portion 15 of the slide track 14. Both trained as a compression spring retracting force accumulator 5 and also designed as a compression spring ejection force memory 3 are shown in their maximum relaxed position. This maximum position is determined due to the slide tracks 14 and 11 and the respective slide 13 and 10.

Will now according to Fig. 2B the movable furniture part 2 moves by hand in the closing direction SR, first the driver 17 comes into contact with the actuating element 25 of the ejection slide 10. Since the Einziehschlitten 13 is held in the locked position VE, by this movement of Einziehkraftspeicher 5 is stretched (see the other Figures 2C, 2D and 2E ).

Once the position according to Fig. 2F is reached, the ejection slide 10 enters the heart cam-shaped portion 15 of the discharge gate path 11 and is deflected therein, so that the driver 17 is disengaged from the actuating element 25 of the ejection slide 10.

As soon as the driver 17 is no longer connected to the actuating element 25, the retracting energy accumulator 5 could stretch again. However, since the ejection slide 10 is already in the heart-curved portion 12 of the discharge gate track 11, the control pin 29 is held in the detent recess of the heart cam-shaped portion 12 or pressed by the Einziehkraftspeicher 5 in the detent recess. As a result, the ejection slide 10 reaches the locking position VA (see Fig. 2G ). Since the driver 17 has detached from the actuating element 25, the movable furniture part is in freewheel F and can be moved by an operator further in the closing direction SR.

At the end of the freewheel F, the driver 17 passes between the catch elements 26 of the Einziehschlittens 13 (see Fig. 2H ). In this position, the piston of the damper 18 comes into abutment with the movable furniture part. 2

By further moving the movable furniture part 2 in the closing direction SR of the Einziehschlitten 13 is moved from its locking position VE and unlocked (see Fig. 2I ).

Through this unlocking the Einziehkraftspeicher 5 is free and can relax under retraction or insertion of the movable furniture part 2 in the closing direction SR. The force is transmitted from the Einziehkraftspeicher 5 via the Einziehschlitten 13 and the left catch element 26 further on the driver 17 on the movable furniture part. This power transmission is damped by the damping device 18. In addition, when pulling the ejection force memory 3 is stretched (see Fig. 2J ).

The Einziehkraftspeicher 5 discharges until the driver 16 abuts the actuating element 25 of the ejection slide 10. In this position according to Fig. 2K can not retract the Einziehkraftspeicher 5, since it is clamped between the two drivers 16 and 17. In this position, the ejection force memory 3 is almost completely tensioned and the movable furniture part 2 is in the closed position SS.

In order now to open the movable furniture part 2, is pressed by an operator in the closing direction SR on the movable furniture part 2. As a result, the driver 16 moves via the actuating element 25, the ejection slide 10 and the control pin 29 from the detent recess of the heart-curved portion 12 and the drive device 1 enters the overpressed closed position ÜS (see Fig. 2L ).

Once the movable furniture part 2 is released after the overpressure, the ejection force memory 3 can relax and moves over the Einziehschlitten 13 and the clamped Einziehkraftspeicher 5 the ejection slide 10 and thus subsequently the driver 16 together with movable furniture part 2 in the opening direction OR (see Fig. 2M ).

According to Fig. 2N can the ejection force memory 3 continue to relax until the Einziehschlitten 13 in the bent portion 15 of the slide track 14 passes (see Fig. 2O ). As a result, the open position OS is reached and the Einziehschlitten 13 is again in the locked position VE. In addition, in this position, the driver 17 is no longer held between the catch elements 26 and the previously only partially relaxed Einziehkraftspeicher 5 can act as Stützungskraftspeicher 7 and moves the movable furniture part 2 via the ejection force memory 3 and its actuator 25 in the further open position OS1 (see Figs. 2P, 2Q and 2R ).

In Fig. 2R is again the starting position according to Fig. 2A achieved, with the damping device 18, as known per se, has moved back into the starting position. As a damping device 18, for example, a fluid damper can be used. For the return movement of the damping piston, a return spring can be arranged in the cylinder.

A second variant of the present invention is in the FIGS. 3A to 3R shown. In contrast to the first variant, the slide track 14 additionally has an escape section 27. This does not move the ejection force memory 3, the movable furniture part from its closed position SS but the support power storage 7. The ejection force memory 3, however, moves the movable furniture part 2 from its open position OS in a further open position OS1.

In Fig. 3A it can be seen that the Einziehschlitten 13 is in the locked position VE. In this case, a part of the Einziehschlittens 13 abuts on the only in the opening direction OR traversable reverse lock 28, so that the Einziehschlitten 13 can not move by relaxing the Einziehakraftspeichers 5 in the escape section 27.

The Fig. 3B to 3L correspond with the Fig. 2B to 2L Therefore, for a detailed description of this second variant as described below only at Fig. 3L will continue.

By overpressing the movable furniture part in the closing direction SR the overpressed closed position ÜS is reached. In this case, the ejection slide 10 is unlocked and moves the movable furniture part in the opening direction OR (see Fig. 3M ). By this movement in the opening direction OR, the Einziehschlitten 13 passes through the corresponding configuration of the slide track 14 in the escape section 27. As a result, the driver 17 is disengaged from the catch elements 26 and the release position FS is reached. Thus, in contrast to the first variant (see Fig. 2M ) Einziehkraftspeicher 5 is no longer clamped between the drivers 16 and 17, but the Einziehkraftspeicher 5 can act as a support force memory 7 and moves the movable furniture part 2 from the closed position SS in the open position OS (see Fig. 3N and 3O ).

Once the support force memory 7 has relaxed so far that the spring force of the ejection force memory 3 is greater than the remaining spring force of the support force memory 7, the ejection force memory 3 can relax and moves the movable furniture part 2 from an open position OS in a further open position OS1 (see Figs. 3P and 3Q ). By this relaxation of the ejection force accumulator 3, the Einziehschlitten 13 moves along the escape section 27 and passes over the preferably spring-mounted reverse lock 28, whereby the Einziehschlitten 13 returns to the locking position VE. In addition, the movable furniture part 2 is moved into the further open position OS1.

In Fig. 3R is again the starting position reached, in which the movable furniture part 2 is freely movable.

By this invention thus a drive device 1 with a discharge device 4 and a retraction device 6 is shown in which one hand, the Einziehkraftspeicher 5 gives energy to the ejection energy storage 3 while pulling and on the other hand, both the ejection force memory 3 and acting as a support force storage 7 Einziehkraftspeicher 5 when ejecting serially successively act on the movable furniture part 2.

Claims (10)

1. A drive device (1) for a moveable furniture part (2), in particular for a drawer, comprising

   - a housing (9),

   - a retraction device (6) having a retraction force storage means (5) for retracting the moveable furniture part (2) from an open position (OS) into a closed position (SS), wherein the retraction device (6) comprises a retraction slider (13) which is acted upon by the retraction force storage means (5) and which is displaceable along a sliding guide track (14) in or on the housing (9) and which is lockable in a locking position (VE) in, preferably a curved portion (15) of, the sliding guide track (14),

   - an ejection device (4) having an ejection force storage means (3) for ejecting the moveable furniture part (2) into an open position (OS), wherein the ejection device (4) comprises an ejection slider (10) which is acted upon by the ejection force storage means (3) and which is displaceable along an ejection sliding guide track (11) in or on the housing (9) and which is lockable in a locking position (VA) in, preferably a cardioid-shaped portion (12) of, the ejection sliding guide track (11),

   characterized in that the ejection force storage means (3) can be loaded by the retraction force storage means (5) upon retraction of the moveable furniture part (2), wherein the retraction force storage means (5) is fixed on the one hand to the retraction slider (13) and on the other hand to the ejection slider (10), wherein the movable furniture part (2) is movable into opening direction (OR) by the retraction force storage means (5), so that the retraction force storage means (5) also functions with a part of its energy as an assistance force storage means (7) for ejecting the moveable furniture part (2).
2. A drive device as set forth in claim 1, characterized in that the moveable furniture part (2) is moveable out of the closed position (SS) into an open position (OS) only by the ejection force storage means (3) (Figures 2K through 20).
3. A drive device as set forth in claim 1 or claim 2, characterized in that the moveable furniture part (2) is moveable from an open position (OS) into a further open position (OS1) by the retraction force storage means (5) functioning as an assistance force storage means (7).
4. A drive device as set forth in claim 1, characterized in that the moveable furniture part (2) is moveable out of the closed position (SS) into an open position (OS) only by the assistance force storage means (7).
5. A drive device as set forth in claim 4, characterized in that the moveable furniture part (2) is moveable from an open position (OS) into a further open position (OS1) by the ejection force storage means (3).
6. A drive device as set forth in one of claims 1 through 5, characterized in that the ejection force storage means (3) and the retraction force storage means (5) are respectively in the form of a spring, preferably a compression spring, wherein the spring constant of the ejection force storage means (3) is less than the spring constant of the retraction force storage means (5).
7. A drive device as set forth in one of claims 1 through 6, characterized in that the ejection force storage means (3) is fixed on the one hand to the housing (9) and on the other hand to the retraction slider (13).
8. A drive device as set forth in one of claims 1 through 7, characterized in that the retraction slider (13) and the ejection slider (10) can be coupled portion-wise to entrainment means (16, 17) preferably arranged on the moveable furniture part (2).
9. A drive device as set forth in one of claims 1 through 8, characterized by a damping device (18) for damping the retraction movement of the moveable furniture part (2), that is triggered by the retraction force storage means (5).
10. An article of furniture (19) comprising a furniture carcass (8) and a moveable furniture part (2), wherein the moveable furniture part (2) is moveable by a drive device (1) as set forth in one of claims 1 through 9.

Images