EP2872004B1 - Drive device for a movable piece of furniture - Google Patents

Description

The invention relates to a drive device for a movable furniture part, with a movable furniture in the opening direction acting ejection element, a housing, arranged in or on the housing, movable relative to the housing locking element for the ejection element, connected to the ejection element locking element, in the closed position on Latching element abuts, wherein in the housing at least partially a slide track is formed for the ejection element mounted on the locking element, wherein the locking element forms at least part of a detent recess of the slide track, which is locked in the opening direction by the locking element at least in the closed position of the movable furniture part of the path of the locking element, wherein the ejection element both in overpressures of the movable furniture part of a closed position in the closing direction and when pulling the movable furniture part from the closed position in the opening direction is releasable, and a detection device for detecting the position of the movable furniture part. In addition, the invention relates to a piece of furniture with such a drive device.

In the furniture fitting industry, various drive devices with lockable ejection devices have been known for years in which unlocking takes place by pressing or pulling on the movable furniture part (drawer, flap, door or the like). By this unlocking the ejection element is free and can eject the movable furniture part in the opening direction.

An example of this comes from the applicant's own, post-published and an older law forming Austrian patent application A 1891/2011 out.

Also the EP 2 294 944 A1 shows a locking system in which a switching element is locked in a loop-shaped portion of a switching cam. This switching curve has a detent recess, wherein the detent recess is at least partially movable to cause an unlocking of the switching element in a force acting on the switching element in the opening direction, wherein when unlocking a switching element of a detent fitting, the force of at least two energy stores unlocking the switching element of second detent fitting causes.

Both documents thus show a force-controlled release of the locking element or switching element, wherein when moving the movable furniture part from the closed position in the opening direction (ie by pulling) on the locking element or the switching element itself a part of the locking element or the detent recess itself against a Spring force is moved, whereby the ejection element unlocked. The disadvantage here is that especially for unlocking by pulling against the force of a separate energy storage must be drawn. Furthermore, the invention relates to a separate from the locking element transmission device for transmitting the detected by the detection device position of the movable furniture part provided on the locking element, wherein the locking element is movable when pulling the movable furniture part from the closed position in the opening direction by the transmission device. Thus, at least when pulling no longer the locking element itself serves to transmit the detected movement of the movable furniture part pulling. Rather, a separate from the detent element transfer device is provided, which additionally unlocks the ejection element when pulling -je after execution additionally when overpressing.
Such a drive device according to the preamble of claim 1 is derived from the EP 2 371 241 A1 out. Another generic drive device is in the EP 2 272 400 A1 apparently. The object of the present invention is to provide a prior art alternative or improved over the prior art drive device.
This is achieved by a drive device having the features of claim 1. In order to guarantee an exact detection and transmission of the position of the movable furniture part on the locking element, the invention provides that the transmission device has a movable, preferably pivotable, coupling element, wherein upon movement of the detection device from the closed position in the opening direction, the transmission device via the coupling element with a Coupling element of the detection device can be coupled. If only the movement of the movable furniture part in the opening direction should have an effect on the transfer device, then the preferred When the detection device moves in the closing direction, the coupling element can be driven over by the coupling element of the detection device.

According to a preferred embodiment of the present invention can be provided that the detection device can be coupled via a driver at least in a portion of the path of movement of the movable furniture part with the movable furniture part. Especially in the closed position immediately upstream movement of the movable furniture part this coupling should be done.

For a simple constructive embodiment, it can be provided that the transmission device has a transmission carriage movably mounted in or on the housing, wherein preferably the locking element is formed integrally with the transfer carriage. Thus, the transfer carriage on the one hand serves to transmit the movement of the movable furniture part on the locking element and at the same time forms part of the detent recess of the slide track.

In principle, in addition to a lockable ejection device, the drive device can also have a retraction device for retracting the movable furniture part from an open position into the closed position. Preferably, the retraction device forms part of the detection device, especially when the driver is arranged on the retraction device. The retraction device may additionally be damped by a damping device.

Protection is also sought for a piece of furniture with a furniture body, a movable furniture part and a drive device according to the invention for the movable furniture part. Preferably, the majority - that is, except for the driver - the drive device associated with the movable furniture part and engages a catch lever on the furniture body fixed carrier. But it can also be provided in the reverse manner, that the lockable ejection device is arranged on the furniture body and the driver is mitbewegbar with the movable furniture part.

Fig. 1 bis 4

schematisch ein bewegbares Möbelteil in verschiedenen Stellungen mit einer Antriebsvorrichtung,

Fig. 5 bis 6

Explosionsdarstellungen einer Antriebsvorrichtung,

Fig. 7 bis 12

diverse, aufgebrochene 3D-Darstellungen der Antriebsvorrichtung,

Fig. 13 bis 19

den Bewegungsablauf beim Schließen und Entriegeln durch Überdrücken,

Fig. 20 bis 22

den Bewegungsablauf beim Entriegeln durch Ziehen und

Fig. 23 bis 29

ein zweites Ausführungsbeispiel einer Antriebsvorrichtung mit weggesteuerter Auslösung.

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 to 4

schematically a movable furniture part in different positions with a drive device,

Fig. 5 to 6

Exploded views of a drive device,

Fig. 7 to 12

various, broken-up 3D representations of the drive device,

Fig. 13 to 19

the movement sequence when closing and unlocking by overpressing,

FIGS. 20 to 22

the movement when unlocking by dragging and

Fig. 23 to 29

A second embodiment of a drive device with path-controlled release.

Fig. 1 schematically shows a furniture 16 consisting of a furniture body 17 and a movable furniture part 2, on the front side of a front panel 21 is attached. The movable furniture part 2 is movably supported via a drawer rail 22 on a carcass rail 23, possibly also via a middle rail (not shown). The carcass rail 23 forms in this schematic representation simultaneously the housing 4 of the drive device 1 in this Fig. 1 is the entire drive device 1 assigned to the furniture body 17, only the driver 9 moves with the movable furniture part 2 with. In principle, the arrangement can also be arranged exactly the other way round, so that the drive device 1 is associated with the movable furniture part 2, while the driver 9 is arranged furniture furniture fixed. About a detection device 7, the position of the movable furniture part 2 - in particular of the driver 9 - detected and forwarded via the transfer carriage 14 shown in this case as a circle to the locking element 5. The transfer carriage 14 and the detection device 7 together with any other elements, the transmission device 8 for transmitting the detected by the detection device 7 position of the movable furniture part 2 on the locking element 5. The ejection element 3 (may also be referred to as ejection slide 3) is movable on the housing 4 stored and acted upon by an ejection force memory 18 in the opening direction OR. Since the movement of the ejection element 3 in the opening direction OR by the locking element. 5 is locked, the movable furniture part 2 can not be ejected in the opening direction OR, whereby the movable furniture part 2 is in the closed position SS.

If now according to Fig. 2 is pressed on the movable furniture part 2 in the closing direction SR, the locking member 5 is moved via the transfer device 8, so that the discharge path for the discharge element 3 is released. When overpressure in the closing direction SR not necessarily the locking element 5 must be moved, as in the Fig. 1 to 4 and Fig. 23 to 29 , Rather, the position of the movable furniture part 2 can be forwarded directly to the ejection element 3 arranged ejection element 6 of the detection device 7, so that this moves from a detent recess 13 of a heart-shaped slide track 12 in an opening portion 45 of the slide track 12, as in the Fig. 5 to 22nd shown. This overpressure reaches the overpressure position ÜS.

In contrast, in Fig. 3 a shown by pulling the movable furniture part 2 in the opening direction OR unlocked drive device 1. This opening movement is detected by the detection device 7, whereby the latching element 5 is moved relative to the housing 4 via a separate from the locking element 6 transmission device 8 and thereby releases the discharge path for the discharge element 3. As a result, the immediately before the closed position SS lying train position ZS is reached.

In Fig. 4 has the ejection element 3 after its release by pressing (in accordance with Fig. 2 ) or by dragging ( Fig. 3 ) By relaxing the ejection force memory 18, the movable furniture part 2 is ejected in the opening direction OR, whereby an open position OS is reached. When ejecting the driver 9 is disengaged from the detection device 7. This can be done by pivoting away the catch lever 37 of the detection device 7.

Exploded views of a concrete embodiment of a drive device 1 are in the Fig. 5 and 6 shown. The housing base plate 24, the housing center plate 26 and the housing cover 25 together form the housing 4, the housing 4 preferably being mounted on the housing base plate 24 on a drawer rail 22. To change the position of the movable furniture part 2 to achieve in its closed position SS relative to the furniture body 17, the housing center plate 26 relative to the furniture part fixed components housing base plate 24 and housing cover 25 are moved. An exact adjustment is possible via the adjusting means 28 and formed on the housing center plate 26 adjusting knobs. With the housing center plate 26 and a damping device 27 is connected to the damping of the retraction movement of the movable furniture part 2. The individual components of this damping device 27 are not specified.

In the housing center plate 26 and thus in the housing 4, the slide track 12 is formed, in which the locking element 6 moves. The locking element is pivotally supported at one end to the bearing 42 in the ejection element 3. The ejection element 3 is movable between stops relative to the housing center plate 26. At this ejection element 3, the spring base 33 for the ejection force accumulator 18 (tension spring) is formed. The other end of the ejection force accumulator 18 is held on the spring base 32. This spring base 32 is located on the spring tensioning element 30, which is fixedly connected to the housing base plate 24. Depending on the location of the attachment of the spring tensioning element 30 on the housing base plate 24, the spring tension can be adjusted. About the adjusting element 31 arranged on the housing base plate 24 spring tensioning element 30 can be moved relative to the housing base plate 24 and thus the spring tension of the ejection force memory 18 can be adjusted.

At the ejection element 3 is also a spring base 35 for the Einziehkraftspeicher 19 (tension spring), which on the other hand is attached to the trained on Einziehschlitten 15 spring base 34. This Einziehschlitten 15 (also referred to as retractor 15) is limited movable by stops mounted on the ejection slide 3. At one end of the Einziehschlittens 15 is the axis of rotation 38 for the catch lever 37. About this catch lever 37 - which is part of the detection device 7 - the driver 9 is held. The driver 9 is fixedly connected to the mounting plate 36, which is mounted on the body rail 23, not shown. At the end of the Einziehschlittens 15 and a Dämpfanschlag 40 is provided so that upon contact between the Einziehschlitten 15 and the driver 9 no loud noise occurs and the components are protected.

For the path-controlled release of the ejection slide 3 or for the path-controlled cancellation of the lock when pulling the movable on the housing middle plate 26 mounted transfer carriage 14 is provided. This has at one end the locking element 5, which partially forms the detent recess 13 of the slide track 12. In addition, on this transfer carriage 14 which also the slide track 12 co-forming Abweisschräge 43 is formed for the overpressures. At the front end of the transfer carriage 14, the elastic coupling element 10 is held, which corresponds to the coupling element 11 formed on the Einziehschlitten 15. On the transfer carriage 14 and the evading element 20 is arranged, on the not full ejection movement, the locking element 6 can be moved back into the closed position SS. The sprung mounted on the housing center plate 26 slider 39 serves to ensure that the locking element 6 does not enter an undesirable portion of the slide track 12, especially if the drawer is thrown too low energy and is ejected again before locking. With such a movement, the slider 39 remains closed.

In Fig. 7 the drive device 1 is shown in the assembled state, with the housing cover 25 is removed. It can be seen that the damping device 27 is clamped in the housing center plate 26. In addition, on the one hand on the housing base plate 24 and the spring tensioning element 30 and on the other hand attached to the ejection slide 3 ejection force memory 18 can be seen. Also, the Einziehschlitten 15 and the attached catch lever 37 are partially visible. Through the middle plate 26 through the majority of the transfer carriage 14 is visible.

In Fig. 8 is opposite Fig. 7 the housing center plate 26 hidden, whereby a better view of the ejection slide 3 and the Einziehschlitten 15 is ensured. It can be seen that at one end of the Einziehschlittens 15 - which is formed by the locking element stop 41 - the locking element 6 is present. The locking element 6 can not escape from this position, since it is guided in the slide track 12.

This slide track 12 is for the most part in Fig. 9 can be seen in which of the drive device 1 only the housing base plate 24 is missing. Trained as a tension spring Einziehkraftspeicher 19 is held between the spring bases 34 and 35. The ejection force accumulator 18 is held on the spring bases 32 and 33. Of the Trap lever 37 is shown in the open position, wherein the driver 9 is already applied to the stop 40 of the Einziehschlittens 15.

To give a better insight to the locking element 6 is in Fig. 10 in contrast to Fig. 9 a part of the ejection slide 3 hidden. As a result, it can be seen that the latching element 6 bears against the slide track 12 and the latching element stop 41. In this first coupling position K1 of the locking element 6 of the Einziehschlitten 15 is coupled to the ejection slide 3, since the Einziehschlitten 15 can not move to the left relative to the ejection slide 3 due to the stop element 6 abutting the latching element stop 41. As a result, the Einziehkraftspeicher 19 can not relax.

In contrast, in Fig. 11 the Einziehkraftspeicher 19 relaxed because the locking element 6 has reached the second coupling position K2, in which the path for the Einziehschlitten 15 was released relative to the ejection slide 3.

This is fitting in Fig. 12 the Einziehschlitten 15 partially hidden, so that the view is free to the held in or on the locking recess 13 locking element 6.

In Fig. 13 is the drive device 1 and thus the movable furniture part 2 in the open position OS. The locking element 6 is - similar to in Fig. 10 - On the locking element stop 41 of the Einziehschlittens 15 and is guided in the formed in the middle plate 26 slide track 12. The entire ejection slide 3 is located in a first movement section B1 and the detent element 6 is located in the first coupling position K1. At the other end of the Einziehschlittens 15 via the catch lever 37, the coupling with the driver 9 can be seen. Partially covered by the housing center plate 26, the transfer carriage 14 is arranged to be movable relative to the housing center plate 26. This transfer carriage 14 also forms parts of the slide track 12 with. Thus, the transfer carriage, for example, the locking element 5 and the Abweisschräge 43 for the locking element 6 and the guide slope 47 for the coupling element 11. In addition, the coupling element 10 is pivotably mounted on the transfer carriage 14, which can correspond to the coupling element 11.

When the movable furniture part 2 of Fig. 13 is moved further in the closing direction SR, the locking element 6 moves while maintaining the first coupling position K1 along the link path 12, which is partially formed by the evading element 20. In Fig. 14 is the end of the straight closing portion of the slide track 12 and thus reaches the end of the first movement section B1.

Once the movable furniture part 2 from the position according to Fig. 14 continue in the position according to Fig. 15 is moved, the locking element 6 is urged by the locking element stop 41 of the Einziehschlittens 15 in the detent recess 13 of the slide track 12. As a result, the Einziehschlitten 15 is decoupled from the ejection slide 3 and at the same time the ejection slide 3 is locked to the housing 4 and the second coupling position K2 is reached. By this one movement of the locking element 6 thus two coupling operations are made.

From the open position OS according to Fig. 15 in the closed position SS according to Fig. 16 the movable furniture part is moved or pulled by relaxing the Einziehkraftspeichers 19. As soon as the coupling element 11 abuts the coupling element 10 of the transfer carriage 14 just before the end of this retraction movement, the entire transfer carriage 14 is first moved to the left in the housing middle plate 26 until it stops. Thereafter, the coupling element 11 passes over the coupling element 10 in the closing direction SR. With this left moving the transfer carriage 14 and its locking element 5 is moved to the left and forms together with a part of the housing 4 (in particular in the middle plate 26) formed link track 12, the actual locking recess 13 for the locking element 6 in the housing 4. Das Locking element thus remains in the second coupling position K2, albeit slightly offset Fig. 15 , In the Fig. 16 is clearly visible that now the slide track 12 has a heart curve shape.

If in this closed position SS is pressed in the closing direction SR on the movable furniture part 2 (see Fig. 17 ), the Einziehschlitten 15 is further moved in the closing direction SR. Since this Einziehschlitten 15 has reached an end stop on the ejection slide 3 in this closed position SS, and the ejection slide 3 is moved together with the locking element 6 pivotally mounted thereto in the closing direction SR. As a result, the locking element 6 moves according to Fig. 17 from the detent recess 13 until the locking element abuts the Abweisschräge 43. This is the result Overpressure reaches ÜS. At the same time, the coupling element 11 is deflected by the guide slope 47.

By rejecting the Abweisschräge 43 (see Fig. 18 ), the locking element 6 passes through the formed in the transfer carriage 14 and part of the slide track 12 forming depression 44 in the direction of opening portion 45 of the link path 12th

Once this opening portion 45 is reached, the ejection element 3 is unlocked and the ejection force memory 18 can relax and the movable furniture part 2 is ejected in the opening direction OR and enters the open position OS (see Fig. 19 ). In this ejection movement of the coupling element 11 via the coupling element 10 again the transfer carriage 14 is moved to the stop a piece in the opening direction OR, so that again the starting position of the transfer carriage 14 is reached. If the opening movement is interrupted shortly after the start, the locking element 6 can move through the escape channel 48 when closing again and the locking element 6 passes through Wegdrängen the flap-shaped evasive element 20 back into the closing portion of the slide track 12th

In Fig. 20 is again shown the closed position SS, in which the locking element 6 is in the second coupling position K2. These Fig. 20 corresponds to the illustration according to Fig. 16 ,

If SS is not pressed onto the movable furniture part 2 from this closed position, but is pulled on the movable furniture part 2, this movement is detected by the detection device 7 - which is formed by the catch lever 37 and the Einziehschlitten 15. As a result, the Einziehschlitten 15 and with this the coupling element 11 is moved to the right until it rests on the coupling element 10 and this entrains. By this co-movement of the coupling element 10, as in Fig. 21 shown, the entire transfer carriage 14 is moved and the locking element 5 forms no part of the detent recess 13 more. As a result, the path for the locking element 6 is no longer blocked by the locking element 5 and the way into the opening portion 45 of the slide track 12 is free. Thus, the transmission of the pulling movement is not directly on the locking element 6, but this locking element 6 is so to speak, the locking stop (= locking element 5) pulled away and thus repealed the locking position and second coupling position K2.

Subsequently, according to Fig. 22 again the ejection force memory 18 relax and moves over the ejection slide 3 and the retraction slide 15 held thereon, the movable furniture part 2 in the opening direction OR. As soon as the ejection force accumulator 18 has completely relaxed, the retraction force accumulator 19 is loaded with the further momentum of the movable furniture part 2 or by active pulling on the movable furniture part 2 in the opening direction OR until the first coupling position K1 between retraction slide 15 and ejection slide 3 is reached again. When closing the movable furniture part 2, the ejection force accumulator 18 is then stretched before reaching the locking position or second coupling position K2. This essentially corresponds to the first movement section B1, which is between the positions according to FIG Fig. 13 and Fig. 14 lies.

In the Fig. 23 to 29 a second embodiment of a path-controlled release or unlocking of the locking element 6 is shown. On the housing 4 of the ejection slide 3 is acted upon via an ejection force accumulator 18, not shown, in the opening direction. At the end of the ejection slide 3, the locking element 6 is formed by a widening. The detection device 7, which bears directly or indirectly on the movable furniture part 2, forms the transmission device 8 with the transmission carriage 14 designed as a rotary element. The rotary element bears against the locking element 5 acted upon by the locking spring 46.

In Fig. 25 this drive device 1 is shown in the closed position SS, wherein the locking element 5 abuts the drehachsennächsten point of the rotary member. Thus, the spring 46 is substantially relaxed and the locking member 5 holds frictionally or positively the ejection slide 3 via the locking element. 6

If according to Fig. 26 is pressed in the closing direction SR on the detection device 7, the rotary member is rotated clockwise about the eccentric point on the rotary member, whereby the locking member 5 pivots counterclockwise and against the spring force of the locking spring 46. As a result, the locking element 6 is released.

In Fig. 27 a pulling on the movable furniture part 2 and thus a movement of the detection device 7 in the opening direction OR is shown. As a result, the rotary member moves counterclockwise. At the same time, however, the locking element 5 is moved by releasing the locking element 6 again counterclockwise.

By this release, the ejection force accumulator 18, not shown, relax and moves the ejection element 3 in the opening direction OR, whereby the movable furniture part according to the open position OS Fig. 28 reached.

When closing according to Fig. 29 the detent element 6 passes over the locking element 5 with its deflection bevel and returns to the closed position SS in which the ejection element 3 is locked.

In contrast to the first embodiment, the locking element 5 is actively moved in this second embodiment, not only when pulling but also when overpressing relative to the housing, while the locking element 6 each remains passive and is only released.

By this way controlled release of the locking element 6 is thus a force-controlled release alternative way of unlocking the locking element 6 at least when pulling the movable furniture part 2 in the opening direction OR shown.

Claims (8)

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

   - an ejection element (3) which acts on the moveable furniture part (2) in the opening direction (OR),

   - a housing (4),

   - a locking element (5) for the ejection element (3), which is arranged in or on the housing (4) and is moveable relative to the housing (4),

   - a latching element (6) which is connected to the ejection element (3) and which in the closed position (SS) bears against the locking element (5), wherein provided in the housing (4) at least partly is a sliding track (12) for the latching element (6) which is mounted to the ejection element (3), wherein the locking element (5) forms at least a part of a latching recess (13) of the sliding track (12), wherein the path of the latching element (6) in the opening direction (OR) can be blocked by the locking element (5) at least in the closed position (SS) of the moveable furniture part (2), wherein the ejection element (3) can be released both upon over-pressing of the moveable furniture part (2) from a closed position (SS) in the closing direction (SR) and also upon pulling of the moveable furniture part (2) from the closed position (SS) in the opening direction (OR),

   - a detection device (7) for detecting the position of the moveable furniture part (2), and

   - a transmission device (8) which is separate from the latching element (6) for transmission of the position of the moveable furniture part (2), that is detected by the detection device (7), to the locking portion (5), wherein upon pulling of the moveable furniture part (2) from the closed position (SS) in the opening direction (OR) the locking element (5) is moveable by the transmission device (8),

   characterised in that the transmission device (8) has a moveable coupling element (10), wherein upon movement of the detection device (7) from the closed position (SS) in the opening direction (OR) the transmission device (8) can be coupled to a connecting element (11) of the detection device (7) by way of the coupling element (10).
2. A drive device as set forth in claim 1 characterised in that the detection device (7) can be coupled to the moveable furniture part (2) by way of an entrainment member (9) at least in a part of the path of movement of the moveable furniture part (2).
3. A drive device as set forth in claim 1 or 2 characterised in that upon movement of the detection device (7) in the closing direction (SR) the coupling element (10) can be passed over by the coupling element (11) of the detection device (7).
4. A drive device as set forth in one of claims 1 through 3 characterised in that the transmission device (8) has a transmission slide (14) mounted moveably in or on the housing (4).
5. A drive device as set forth in claim 4 characterised in that the locking element (5) is in one piece with the transmission slide (14).
6. A drive device as set forth in one of claims 1 through 5 characterised by a retraction device (15) for retraction of the moveable furniture part (2) from an open position (OS) into the closed position (SS).
7. A drive device as set forth in claim 6 characterised in that the retraction device (15) is part of the detection device (7).
8. An article of furniture (16) comprising a furniture carcass (17), a moveable furniture part (2) and a drive device (1) as set forth in one of claims 1 through 7 for the moveable furniture part (2).

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