EP2983554B1 - Drive device for a movable furniture part - Google Patents

Description

The invention relates to a drive device for a movable in a furniture body furniture part, comprising a base plate, a lockable in a locked position ejection device for moving the movable furniture part from a closed position to an open position, wherein by overpressing the movable furniture part lying in a closing direction behind the closed position Überdrückstellung the ejection device is unlocked, whereby the movable furniture part of the ejection device is movable in the opening direction, wherein the movable furniture part is movable by pulling the movable furniture part from the closed position to an open position, wherein when opening by pulling the ejection device remains in the locked position, and a coupling device for coupling the drive device with the movable furniture part or with the furniture body. In addition, the invention relates to a piece of furniture with such a drive device.

In the furniture fitting industry, so-called touch-latch mechanisms have been known for many years, in which an ejection device is released by pressing the movable furniture part in the closed position, whereupon the movable furniture part (eg a drawer or a furniture flap) is ejected in the opening direction becomes.

In simple non-generic touch latch mechanisms, the ejection device is located somewhere on the furniture body and ejects at least during the first opening path, the movable furniture part. There is no coupling device for coupling the drive device with the movable furniture part. Rather, there is only one stop surface against which the movable furniture part rests directly or indirectly. If in such a drive device instead of the overpressure is simply pulled from the closed position on the movable furniture part, the movable furniture part is lifted from the stop surface without triggering movement in the drive device.

Conversely, in the likewise alien WO 2012/149587 A1 a coupling device during ejection of the movable furniture part in a coupling position, whereas, however, the locking device with the cardioid guideway when opening by pulling is no longer in the locked position. Rather, an escape channel is provided, through which the locking pin can escape when opening by pulling through the "heart" of the heart cord. The locking position is thus not maintained when opening by pulling.

In the same way also with the strangers WO 2011/015663 A2 while opening by pulling while retaining the coupling position between the drive device and movable furniture part or furniture body, however, both unlocking by overpressing and unlocking by pulling an unlocking the lockable ejector is performed.

In contrast, the shows WO 2009/114886 A1 a kind of overload protection, in which the ejection device when opening by pulling in a locking position (see Figure 30c) remains. However, the catch fork is pivoted against the force of a spring from a pin assigned to the furniture body, whereby the drive device when opening is no longer coupled by pulling with the furniture body. A disadvantage of this design is that in such an opening by pulling when re-closing the drive device must be unlocked once, so that only after the pin can be coupled to the catch again.

Therefore, the invention further relates to a coupling device, wherein the coupling device during ejection of the movable furniture part by the ejection device is in a coupling position, wherein when opening by pulling the coupling device is loosely movable relative to the ejection device. Thus, the coupling device remains at least partially when opening by pulling in a coupling position and the coupling device can be moved freely by a spring load of an overload spring. Even when re-closing no unlocking must be done because when inserting the elements of the coupling device can be easily coupled together again. The invention also relates to a guide track formed in the base plate, preferably a cardiac curve, one along the base plate, preferably linear, movable ejection slide and a discharge force accumulator mounted on the one hand on the base plate and on the other hand on the ejection slide. Such a generic drive device is for example from the DE 10 2010 036 903 A1 known.

The object of the present invention is to provide a comparison with the prior art improved or alternative drive device.

This is achieved by a drive device with the features of claim 1. Accordingly, a locking lever pivotally mounted on the ejection carriage and a locking pin attached to the locking lever and movable in the guide track is provided.

The "loose" movement of the coupling device relative to the ejection device can in other words be defined by the fact that, when opening by pulling, the coupling device is movable independently of the ejection device. In turn, in other words, the coupling device is not connected to the ejection device when opening by pulling. In this case, the coupling device with a translational component relative to the drive device can be moved, wherein for example in a linear portion of a guideway, the coupling device is movable without spring loading.

In principle, it can be provided that the coupling device is in a coupling position during the entire opening path of the movable furniture part. Preferably, however, it is provided that when opening by pulling the coupling device remains only in a lying in the opening direction before the closed position first opening path section in the coupling position. In this case, the first Öffnungswegabschnitt between 10 mm and 100 mm, preferably between 20 mm and 70 mm, be long.

Particularly preferably, it is provided for the loose movement that the coupling device has a transmission stop, via which the coupling device in the closed position and in an overpressure between the closed position and the overpressure position on a trigger stop of the Discharge device abuts, whereas when you open by pulling the transfer stop from the release stop lifts and away from it, so there is no contact between the transfer stop and the trigger stop.

In one embodiment, in principle, the trigger stop may be attached to any part, e.g. on the ejection slide of the ejection device, be formed. However, it is preferably provided that the trigger stop of the ejection device is formed on the locking lever.

Furthermore, in a preferred embodiment of the present invention, it may be provided that the coupling device has a coupling slide which is movable linearly, at least in sections, in the base plate and a catch element which is movable, preferably pivotable, mounted on the coupling carriage for a coupling driver arranged on the furniture body or on the movable furniture part, wherein the coupling slide and the catching element along a formed in the base plate, sections linear guide track with an angled end portion are movable. It is preferably provided that the transmission stop of the coupling device is formed on the coupling carriage.

In order not only to integrate the function of an active ejection by overpressing in the drive device, the drive device may preferably also have a retraction device for pulling the movable furniture part from an open position to the closed position. For the coupling of the retraction device with the furniture body or with the movable furniture part can be provided that the retraction device can be brought via a Einziehfangelement with a separate from Koppelmitnehmer Einziehmitnehmer.

If the ejection device and the retraction device of the drive device form a common structural unit, it is preferably provided that the retraction device with the coupling device via the Einziehfangelement at least partially coupled and when opening by pulling a Einziehkraftspeicher the retractor along the first Öffnungswegabschnitts is tensioned. Consequently is located when pulling through the retraction device, the coupling device in the coupling position.

In principle, however, the retraction device and the ejection device need not be designed as a structural unit. Rather, it can often happen that a drive device according to the invention should be retrofitted to existing movable furniture parts or pull-out. In this case, for example, pull-in devices which have a pull-in device are already present in the pull-out guides. Thus, then only the ejector must be retrofitted, in which case two separate carriers (Einziehmitnehmer and Koppelmitnehmer) are provided for connection or coupling between the drive device and the furniture body or the movable furniture part.

Protection is also desired for a piece of furniture with a furniture body, a furniture part movable relative to the furniture body and a drive device according to the invention for the movable furniture part. It can basically be provided that the drive device is arranged on the furniture body and a Koppelmitnehmer is associated with the movable furniture part. According to a preferred embodiment, however, it is provided that the drive device is arranged on the movable furniture, wherein the coupling device has a the furniture body associated and engageable with the catch element Koppelmitnehmer.

Fig. 1

schematisch ein Möbel mit bewegbaren Möbelteilen in verschiedenen Stellungen,

Fig. 2

ein bewegbares Möbelteil von unten mit einer Antriebsvorrichtung,

Fig. 3

eine Explosionsdarstellung einer Antriebsvorrichtung,

Fig. 4

die Antriebsvorrichtung in Schließstellung,

Fig. 5

die Antriebsvorrichtung in Überdrückstellung,

Fig. 6

die Antriebsvorrichtung beim Ausstoßen,

Fig. 7

die Antriebsvorrichtung nach Beendigung des Ausstoßvorganges,

Fig. 8

die Antriebsvorrichtung mit Ausstoßvorrichtung und Einziehvorrichtung in Schließstellung,

Fig. 9

die Antriebsvorrichtung beim Öffnen durch Ziehen und

Fig. 10

die Antriebsvorrichtung nach Beendigung des Öffnens durch Ziehen.

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 movable furniture parts in different positions,

Fig. 2

a movable furniture part from below with a drive device,

Fig. 3

an exploded view of a drive device,

Fig. 4

the drive device in the closed position,

Fig. 5

the drive device in overpressure position,

Fig. 6

the drive device when ejecting,

Fig. 7

the drive device after completion of the ejection process,

Fig. 8

the drive device with ejection device and retraction device in the closed position,

Fig. 9

the drive device when opening by pulling and

Fig. 10

the drive device after completion of the opening by pulling.

In FIG. 1 is a piece of furniture 14 consisting of a furniture body 2 and several movable furniture parts 3 in the form of drawers. Seen from top to bottom are the drawers in an open position OS, then in a further in the closing direction SR moving open position OS, then in the closed position SS and at the very bottom in the overpressure ÜS. In general, it should be mentioned that the movable furniture part 3 consists of a drawer container 24 and a front panel 25. Each movable furniture part 3 is movably mounted on the furniture body 2 via a pull-out guide 28. In this case, the pull-out guide 28 has a drawer rail 26, a carcass rail 27 and optionally a middle rail, not shown. In addition, for example, between the drawer rail 26 and the carcass rail 27, a schematically indicated retraction device 19 may be provided. The drive device 1 has an ejection device 4, which is assigned to the movable furniture part 3 in this case. As essential components, the ejection device 4, the fixed to the movable furniture part 3 and the drawer rail 26 base plate 8, formed in the base plate 8 cardioid guideway 9, the mounted on the base plate 8 ejection slide 10, the ejection slide 10 pivotally mounted locking lever 11th , the locking pin 12 mounted on the locking lever 11 and movable in the heart-shaped guideway 9 and the ejection force accumulator 13 spanned between the ejection slide 10 and the base plate 8. In addition, the ejection device 4 is coupled via a coupling device 5 and the Koppelmitnehmer 16 with the furniture body 2.

This coupling driver 16 is also in FIG. 2 can be seen, which is mounted on the cam plate 27 via the driver plate 30. The drive device 1 itself is mounted on the base plate 8 or a cover 31 on the drawer bottom 29 of the movable furniture part 3.

In the exploded view according to FIG. 3 it can be seen that the cardioid guideway 9 is formed in the base plate 8. This guideway 9 has here as an important component of the latching area 33. At this base plate 8 and a Tiefenverstellrad 32 is rotatably mounted. Along the formed on the base plate 8 guide track 43 of the ejection slide 10 of the ejector 4 is mounted linearly displaceable. Between the ejection slide 10 and the base plate 8, the ejection force accumulator 13 designed as a tension spring is clamped over the spring base 37 and the spring base 38. At the ejection slide 10, the locking lever 11 via the pivot bearing 35, the pivot pin 34 and the pivot bearing 36 is pivotally mounted. On the locking lever 11 of the locking pin 12 is arranged, which is movable in the guide plate 9 formed in the base plate 8. On the locking lever 11 and the release stop 7 is formed. Suitably, the transfer stop 6 is formed on the coupling carriage 14. On the coupling carriage 14, the catch element 15 is pivotally mounted on the axis of rotation X. The coupling carriage 14 and the catch element 15 are movably supported by the guide pins 39 and 40 in the guide track 17 formed in the base plate 8. This guideway 17 has the angled end portion 18 for the guide pin 39. The coupling carriage 14 and the catch element 15 together with a in FIG. 3 The coupling device 5, which is not shown, can be fastened to the base plate 8 by means of a cover 31 which can be fastened to the base plate 8. The drive device 1 is closed.

In FIG. 4 the drive device 1 is shown in a position when the movable furniture part 3 is in the closed position SS. At the same time, in this closed position SS, the lockable ejection device 4 is in a locked position V, since the locking pin 12 attached to the locking lever 11 is located in the latching region 33 of the guide track 9. In this locked position V of the ejection force accumulator 13 is stretched. In addition, the coupling device 5 is in a coupling position K, in which the furniture body 2 associated Koppelmitnehmer 16 is held or caught between the coupling carriage 14 and the catch element 15. In this closed position SS there is a contact between the transmission stop 6 formed on the coupling carriage 14 and the release stop 7 formed on the locking lever 11.

Now, starting from this position according to FIG. 4 is pressed onto the movable furniture part 3 in the closing direction SR, the movable furniture part 3 enters an overpressure area Ü between the closed position SS and the overpressure position ÜS, as shown in FIG FIG. 5 is shown. Since the Koppelmitnehmer 16 is corpus, the base plate 8 of the drive device 1 is moved relative to the Koppelmitnehmer 16 in the closing direction SR when overpressing. However, since the Koppelmitnehmer 16 is coupled to the coupling device 5, the coupling carriage 14 and the transmission stop 6 and the trigger stop 7 and the locking lever 11 is moved relative to the base plate 8, whereby the arranged on the locking lever 11 locking pin 12 from the detent portion 33 of the cardioid guideway 9 is moved.

Once this position is reached, the ejection force memory 13 is no longer locked and can the ejection carriage relative to the base plate 8 to the position according to FIG. 6 move. With this movement of the ejection slide 10 and the locking lever 11 and the trigger stop 7 and the transmission stop 6 and the coupling carriage 14 is moved with. As a result, the drive device 1 pushes off via the coupling device 5 on Koppelmitnehmer 16 and is in an open position OS, in which the coupling device 5 is still in the coupling position K.

At the end of the ejection movement, the drive device 1 is in the position according to FIG. 7 in which the movable furniture part 3 is still in an open position OS and the coupling device 5 still dwells in the coupling position K. For the decoupling of the coupling device 5, the movable furniture part 3 is moved either by momentum or by pulling further in the opening direction OR until the catch element 15 passes through the guide pin 39 in the angled end portion 19 of the guide track 17, so that the Koppelmitnehmer 16 no longer between the coupling carriage 14 and the catch element 15 is caught. In the position according to FIG. 7 the ejection force accumulator 13 is relaxed.

Such a drive device 1 according to the FIGS. 3 to 7 can be easily retrofitted to an existing movable furniture part 3. It can already be a retracting device 19 z. B. in the pull-out guide 28 are located.

However, in order to provide a drive device 1 as a structural unit with an ejection device 4 and a retraction device 19, the embodiment according to the FIGS. 8 to 10 directed. In these FIGS. 8 to 10 is unlike the FIGS. 4 to 7 The opening by pulling described and illustrated, this opening by pulling course synonymous for the FIGS. 4 to 7 applies. Conversely, the unlocking applies by overpressures according to the FIGS. 4 to 7 mutatis mutandis for the FIGS. 8 to 10 ,

In FIG. 8 is the movable furniture part 3 - as well as in FIG. 4 In the closed position SS. In this case, the ejection device 4 is in the locked position V, in which the locking pin 12 is locked in the latching region 33 of the guideway 9. As from the right representation according to FIG. 8 is visible, the rear view of the drive device 1 is shown, wherein the base plate 8 is connected to a base plate 42 of the retractor 19. As essential components, the pull-in device 19, the base plate 42, the Einziehfangwerks 20, formed in the base plate 42 Einziehführungsbahn 41 for the Einziehfangelement 20 and on the one hand to the base plate 42 and on the other hand Einziehfangelement 20 attached Einziehkraftspeicher 21. This Einziehkraftspeicher 21 is designed as a tension spring. As a further important component for the pulling-in device 19, the catching element 15 of the coupling device 5 has the pull-in catch 22, which is held in the catching area of the catching catch element 20. The separate from this Einziehmitnehmer 22 Koppelmitnehmer 16 is held between the catch element 15 and the coupling carriage 14. If - as in Fig. 5 shown in the closing direction SR is pressed onto the movable furniture part 3, the elastic arm 44 of the Einziehfangelements 22 and allows the movement of the Fangelements 15 together with the Einziehmitnehmer 22 relative to Einziehfangelement 20 against the closing direction SR, as the Einziehfangelement 20 already in his End stop is located in the Einziehführungsbahn 41. This end stop is necessary to stop the movable furniture part 3 when pulling through the retracting device 19 in the closed position SS and not to move further into an overpressure position ÜS. Nevertheless, this movement should be possible in the overpressure position ÜS, for which purpose the elastic arm 44 is provided.

If not like in FIG. 5 the movable furniture part 3 is unlocked by pressing and ejected, but an opening by pulling on the movable furniture part 3 takes place, the drive device 1 comes in an open position according to OS FIG. 9 , In this it can be seen that the ejection device 4 is still in a locking position V. When opening by pulling the base plate 8 is moved relative to the body-fixed Koppelmitnehmer 16 in the opening direction OR. Since the coupling device 5 is coupled via the catch element 15 and the Koppelmitnehmer 14 with the Koppelmitnehmer 16 and thus is in a coupling position K, the trigger stop 7 is lifted from the transfer stop 6, which when opening by pulling the coupling device 5 loose relative to the ejection device. 4 emotional. With this opening movement along the first Öffnungswegabschnitts W and the Einziehkraftspeicher 21 is tensioned, since on the one hand, the spring base 45 moves over the base plate 42 with the base plate 8 in the opening direction OR, the Einziehkraftspeicher 21 but on the other hand on the spring base 46 and the Einziehfangelement 20 with the on Catch element 15 trained Einziehmitnehmer 22 is coupled. Once the angled end portion 47 of the Einziehführungsbahn 41 is reached, the Einziehfangelement 20 pivots so that the Einziehfangelement 20 decoupled from the Einziehmitnehmer 22, as in FIG. 9 is apparent. At the same time, however, is the coupling device 5 with the Koppelmitnehmer 16 still in the coupling position K. In this position according to FIG. 9 the Einziehkraftspeicher 21 is stretched again.

With further movement of the movable furniture part 3 in the opening direction OR, the drive device 1 moves into the position according to FIG FIG. 10 in which the coupling carriage 14 and in particular the catch element 15 has reached the angled end portion 18 in which the coupling position K is released, whereby the Koppelmitnehmer 16 is no longer held. The ejection device 4 is still in the locked position V.

The present invention thus provides a drive device 1 in which the coupling device 5 is freely movable when being opened by pulling against the ejection device 4. As a result, the ejection device 4 can remain when opened by pulling in the locked position V. At the same time, however, the matching coupling position K of the drive device 1 can be achieved immediately when closing again.

Claims (13)

1. A drive device (1) for a furniture part (3) moveable in a furniture carcass (2), comprising

   - a base plate (8),

   - an ejection device (4) lockable in a locked position (V) for moving the moveable furniture part (3) from a closed position (SS) into an open position (OS), wherein the ejection device (4) is unlockable by over-pressing the moveable furniture part (3) into an over-pressing position (ÜS) which is behind the closed position (SS) in the closing direction (SR), whereby the moveable furniture part (3) is moveable by the ejection device (4) in the opening direction (OR), wherein the moveable furniture part (3) is also moveable from the closed position (SS) into an open position (OS) by pulling on the moveable furniture part (3), wherein the ejection device (4) remains in the locked position (V) upon opening by pulling, and

   - a coupling device (5) for coupling the drive device (1) to the moveable furniture part (3) or to the furniture carcass (2),

   wherein the coupling device (5) is in a coupling position (K) upon ejection of the moveable furniture part by the ejection device (4), wherein the coupling device (4) is moveable loosely with respect to the ejection device (4) upon opening by pulling and wherein the ejection device (4) has a, preferably cardioid-shaped, guide path (9) in the base plate (8), an ejection slider (10) which is moveable preferably linearly along the base plate (8) and an ejection force storage means (13) fixed on the one hand to the base plate (8) and on the other hand to the ejection slider (10), characterized by a locking lever (11) mounted pivotably to the ejection slider (10) and by a locking pin (12) mounted to the locking lever (11) and displaceable in the guide path (9).
2. A drive device as set forth in claim 1 characterised in that upon opening by pulling the coupling device (5) remains in the coupling position (K) in a first opening travel portion (W) which is in front of the closed position (SS) in the opening direction (OR).
3. A drive device as set forth in claim 2 characterised in that the first opening travel portion (W) is between 10 mm and 100 mm, preferably between 20 mm and 70 mm, in length.
4. A drive device as set forth in one of claims 1 through 3 characterised in that the coupling device (5) has a transmission abutment (6), by way of which the coupling device (5) bears against a triggering abutment (7) of the ejection device (4) in the closed position (SS) and in an over-pressing region (ÜS) between the closed position (SS) and the over-pressing position (ÜS).
5. A drive device as set forth in claim 4 characterised in that the triggering abutment (7) of the ejection device (4) is provided on the locking lever (11).
6. A drive device as set forth in one of claims 1 through 5 characterised in that the coupling device (5) has a coupling slider (14) displaceable at least portion-wise linearly in the base plate (8) and a catch element (15) mounted moveably, preferably pivotably, on the coupling slider (14), for a coupling entrainment portion (16) arranged on the furniture carcass (2) or on the moveable furniture part (3).
7. A drive device as set forth in claim 6 characterised in that the transmission abutment (6) of the coupling device (5) is provided on the coupling slider (14).
8. A drive device as set forth in claim 6 or 7 characterised in that the coupling slider (14) and the catch element (15) are displaceable along a portion-wise linear guide path (17) in the base plate (8), having an angled end portion (18).
9. A drive device as set forth in one of claims 1 through 8 characterised by a retraction device (19) for retraction of the moveable furniture part (3) from an open position (OS) into the closed position (SS).
10. A drive device as set forth in claim 9 characterised in that the retraction device (19) can be brought into engagement by way of a retraction catch element (20) with a retraction entrainment portion (22) which is separate from the coupling entrainment portion (16).
11. A drive device as set forth in claim 10 characterised in that the retraction device (19) can be at least portion-wise coupled to the coupling device (5) by way of the retraction catch element (20) and upon opening by pulling a retraction force storage means (21) of the retraction device (13) can be stressed along the first opening travel portion (W).
12. An article of furniture (23) having a furniture carcass (2), a furniture part (3) moveable relative to the furniture carcass (2) and a drive device (1) as set forth in one of claims 1 through 11 for the moveable furniture part (3).
13. An article of furniture as set forth in claim 12 characterised in that the drive device (1) is arranged on the moveable furniture part (3), wherein the coupling device (5) has a coupling entrainment portion (16) which is associated with the furniture carcass (2) and which can be brought into engagement with the catch element (15).

Images