EP3941314A1

EP3941314A1 - Drive device for a moveable furniture part

Info

Publication number: EP3941314A1
Application number: EP20706613.5A
Authority: EP
Inventors: Pascal JANSER
Original assignee: Julius Blum GmbH
Current assignee: Julius Blum GmbH
Priority date: 2019-03-20
Filing date: 2020-01-31
Publication date: 2022-01-26
Also published as: CN113613528B; CN113613528A; AT522397A1; US11819128B2; JP2022528509A; TWI730683B; WO2020186276A1; US20220015537A1; JP7411676B2; TW202042713A; AT522397B1

Abstract

The invention relates to a drive device (1) for a moveable furniture part (2), in particular for a drawer, comprising a carrier (3), an ejection device (4) for ejecting the moveable furniture part (2) out of a closed position (SS) into an open position (OS), a locking device (5) for locking the ejection device (4) in the locked position (VS), wherein the locking device (5) has a locking pin (51) connected to the ejection device (4) and a guide track (52) for the locking pin (51) formed at least partially in or on the carrier (3), wherein the locking pin (51) is locked in an engaging recess (R) of the guide track (52) in the locked position (VS), as well as a synchronisation device (6) that can be moved relative to the carrier (3) for synchronising the movement of the drive device (1) with a second drive device (1'), wherein the synchronisation device (6) has a transmission element (60) that can be moved by the locking pin (51), wherein the transmission element (60) remains still at least with the overpressure movement, it can be moved by the locking pin (51) with an opening movement and it can be moved by the locking pin (51) with a closing movement, wherein the transmission element (60) is linearly moveably mounted on the carrier (3).

Description

Drive device for a movable furniture part

The present invention relates to a drive device for a movable furniture part, in particular for a drawer, with a carrier, an ejector device for ejecting the movable furniture part from a closed position into an open position, the ejector device being pushed into an overpressure position behind the closed position by a pushing movement of the movable furniture part can be unlocked from a locking position, a locking device for locking the ejector in the locking position, the locking device having a locking pin connected to the ejecting device and a guide track for the locking pin formed at least partially in or on the carrier, the locking pin in the locking position in a latching recess Guide track is locked, and a relative to the carrier movable synchronization device for synchronizing the movement of the drive device mi A second drive device, the synchronization device having a transmission element movable by the locking pin, the transmission element being stationary at least during the overpressing movement, being movable through the locking pin during an opening movement and being movable through the locking pin during a closing movement. The invention also relates to an arrangement with two synchronized drive devices. The invention also relates to a piece of furniture with such a drive device.

Furniture fittings that support the movements of movable furniture parts (such as drawers, furniture doors and furniture flaps) have been manufactured and used for many years. So-called touch-latch mechanisms are known, with which an opening movement is triggered by pressing on the movable furniture part. By pressing (“touch”) the movable furniture part in the closed position, a lock (“latch”) of the locking device is released, as a result of which the ejector device opens the movable furniture part.

An example for such a furniture fitting or for such a drive device can be found in WO 2017/004638 A1. The locking pin moves after the overpressure at the beginning of the opening movement, a locking element which is formed on the partially sleeve-shaped synchronization coupling piece. This synchronization coupling piece corresponds to the transmission element of the present invention. However, WO 2017/004638 A1 does not constitute a generic prior art, since the synchronization coupling piece is only moved by the locking pin during an opening movement. When the movable furniture part closes, no movement is transmitted from the locking pin to the synchronization coupling piece. Rather, according to this document, the synchronization coupling piece, after the locking pin is no longer in contact with it, is moved by the synchronization force accumulator back into that position in which the locking element arranged on the synchronization coupling piece again forms the locking recess of the guide track. The disadvantage of this document is that an additional energy store must be present and that this energy store results in uncontrolled synchronization of a second drive device.

In contrast, EP 3 054 811 B1 discloses a generic drive device. In this respect, the coupling element corresponds to the transmission element of the present invention. The locking element which forms the latching recess is formed on this coupling element. This coupling element is not acted upon by an energy store. Rather, during a closing movement, the coupling element is moved by the locking pin into that position in which the locking element arranged on the coupling element again forms the latching recess of the guide track. The disadvantage of this document is that the rotatable coupling element is relatively large and requires a lot of space. In addition, the synchronization with the many levers and components that are necessary due to the rotary movement of the coupling element is quite complex.

The object of the present invention is therefore to create an alternative or improved drive device to the prior art. In particular, the known disadvantages of the prior art are to be eliminated. Above all, the drive device should have a simple structure, require relatively little space and comprise few components. This is achieved by a drive device with the features of claim 1. Accordingly, it is provided according to the invention that the transmission element is mounted on the carrier in a linearly movable manner. This means that there is no need for a cumbersome rotary movement of the transmission element that requires a relatively large amount of space.

Preferred embodiments of the invention are defined in the dependent claims.

For example, it is preferably provided that the guide track has a heart curve-shaped section.

Furthermore, it is preferably provided that on the transmission element a

Guide track co-forming locking element is arranged for the locking pin.

It is preferably also provided that the locking pin in the

Locking position is locked in the latching trough of the guide track, the latching trough being formed at least partially by this locking element movable relative to the carrier and wherein the locking pin is held in the locking position on the locking element, preferably on a holding surface formed on the locking element. In particular, provision is made for the locking element, starting from a latching recess formation position, to be linearly movable in a given locking position against the direction in which the locking pin moves during the pushing movement.

Provision is preferably made for the ejection device that it has an ejection slide which can be moved relative to the carrier and an ejection force store fastened on the one hand to the carrier and on the other hand to the ejection slide. The ejection force accumulator is preferably designed as a spring, preferably as a tension spring.

According to a preferred embodiment it is provided that the transmission element has a first transmission stop protruding into an opening section of the guide track, the transmission element in the Opening movement over this first transmission stop from

Locking pin is movable. This movement can thus be transmitted to a second drive device.

It is particularly preferably provided that the first transmission stop is formed by an end face formed on the locking element, preferably oriented transversely to the holding surface. Thus, the locking element has a double function in that one part (specifically the holding surface) is used to lock or latch the locking pin and one part (specifically the end face) is provided for the transmission of movement to a second drive device.

In addition, it is preferably provided that the transmission element has a second transmission stop protruding into a closing section of the guideway, the transmission element being movable by the locking pin during the closing movement via this second transmission stop.

In particular, it is provided that, preferably exclusively, by the movement of the transmission element triggered by the locking pin via the second transmission stop during the closing movement, the locking element can be moved into a latching trough-forming position in which the locking element also forms the latching trough of the guide track.

Furthermore, it is preferably provided that the second transmission stop can be moved by the locking pin from a stop position into an evasive position in which the locking pin is released from the second transmission stop. Thus the locking pin is no longer in contact with the second transmission stop. The second transmission stop is therefore moved by the locking pin into an evasive position that no longer protrudes into the guideway. In other words, the second transmission stop is carried along by the locking pin (only) during part of the closing movement.

It is preferably provided that by moving the second transmission stop into the evasive position, a further movement of the locking pin into a latching section is released. In order not to require a complex, constant synchronization between the drive devices, it is particularly preferably provided that the transmission element stands still when the locking pin moves in the latching section and in a press-over section. This means that no movement transmission is required, especially when engaging and overpressing. So it must z. B. when unlocking by overpressing the movable furniture part can only be moved against the force of the ejection force accumulator of a drive device.

Furthermore, it is preferably provided that the synchronization device has a synchronization coupling element connected to the transmission element. Specifically, this synchronization coupling element can have a plurality of teeth spaced apart from one another, which can be coupled in a movement-transmitting manner to a gear-shaped synchronization coupling counter element.

As such, it is possible for the transmission element to have a carrier body to which the two transmission stops (and also the synchronization coupling element) are detachably attached. For a simple construction, however, it is preferably provided that the transmission element has a carrier body, the first transmission stop, the second transmission stop and / or the synchronization coupling element being / is formed in one piece with the carrier body. A single component thus takes on several tasks.

The drive device described up to now does not have to be used for synchronization or for the transmission of motion to a second drive device. Rather, such a drive device can only be installed individually (and on one side) in a piece of furniture. Then the drive device (actually unnecessarily) also has the components for the synchronization, but such a drive device is advantageous in that only one type of drive device (ie always with synchronization components) has to be produced. This facilitates z. B. warehousing and simplifies or standardizes production.

Protection is not only sought for a single drive device, but also for an arrangement with a (first) drive device according to the invention and a second drive device according to the invention synchronized therewith. Prefers this arrangement also has a synchronization rod for connecting the synchronization devices, in particular the synchronization coupling counter elements, of the two drive devices.

In addition, protection is sought for a piece of furniture with a furniture body, at least one furniture part that can be moved relative to the furniture body and a drive device according to the invention or an arrangement with two drive devices. It is preferably provided that these two drive devices are mounted on opposite sides of the furniture body or the movable furniture part.

The carriers of the drive devices can be attached to the movable furniture part (or to a drawer rail of a drawer extension runner), in which case the ejector devices together with the movable furniture part repel on carriers (assigned to the furniture body). Preferably, however, it is provided that the carriers of the drive devices are attached to the furniture body (preferably each on a body rail of a drawer extension guide), the ejector devices moving the movable furniture part relative to the furniture body in the opening direction via drivers (assigned to the movable furniture part).

Further details and advantages of the present invention are explained in more detail below on the basis of the description of the figures with reference to the exemplary embodiments shown in the drawings. Show in it:

Fig. 1 schematically shows a piece of furniture with a plurality of movable furniture parts in the form of

Drawers,

Fig. 2 is a perspective view of a drawer with drawer extension guides and one

Drive device for a movable furniture part,

3 shows an arrangement of two synchronized drive devices,

4 is an exploded perspective view of the drive device,

5a-5c various views of the drive device in the open position,

6a-6b various views of the drive device when closing,

7a-7c various views of the drive device when the

Locking pin on the second transmission stop, 8a-8c various views of the drive device when releasing the

Locking pin from the second transmission stop,

9a-9c various views of the drive device in the closed position,

10a-10c various views of the drive device in the locking position,

11 a-11 c various views of the drive device in overpressure position,

12a-12c various views of the drive device when the

Locking pin on the first transmission stop,

13a-13c various views of the drive device when releasing the

Locking pin from the first transmission stop,

14a-14c various views of the drive device during the

Ejection movement,

15 shows a plan view of part of the drive device with the locking pin located in the freewheeling channel and FIG

16a-16c various views of the drive device in the open position.

In Fig. 1, a piece of furniture 8 with a furniture body 9 and a total of four movable furniture parts 2 is shown very generally. Each furniture part 2 consists of at least one drawer 10 and a front panel 11. The movable furniture parts 2 are fastened to the furniture body 9 via a drawer extension guide 12, consisting of a drawer rail 13 and a body rail 14 (and possibly a central rail, not shown).

A drive device 1 is shown schematically for the top drawer. The drive device 1 has a carrier 3. In this case, this carrier 3 is attached to the drawer rail 13 (in the schematic illustration according to FIG. 1, the carrier 3 corresponds to the drawer rail 13). The drive device 1 has an ejection device 4, the ejection slide 41 and the ejection force storage device 42 of this ejection device 4 being shown schematically. The locking device 5 has a guide track 52 formed in the carrier and the locking pin 51 guided in the guide track 52 (in this case heart-shaped). Arranged on the body rail 14 (or on the furniture body 9 itself) is a driver 15, with which the ejector device 4 is at least partially in engagement. However, the arrangement can also be reversed: that is, the drive device 1 is assigned to the body rail 14, during the Driver 15 is assigned to the movable furniture part 2. This top drawer is in the open position OS.

When the drawer is moved from this open position OS in the closing direction SR, the locking pin 51 moves in the closing section C of the guide track 52 (see in detail below). The ejection force store 42 is tensioned by a relative movement between the ejection slide 41 and the carrier 3.

In the closed position (third drawer from above) the ejection force store 42 is fully tensioned. This closed position SS can be achieved by a purely manual closing movement. Alternatively, the movable furniture part 2 - if present - can be moved or retracted into the closed position SS by the retraction device 16, which is only shown schematically and is integrated in the pull-out guide 12.

Starting from this closed position SS, the movable furniture part 2 reaches the overpressure position ÜS by pressing on the movable furniture part 2 (lowermost drawer in FIG. 1). This unlocks the locking device 5. After the overpressure carried out in the closing direction SR - as soon as the user no longer presses the movable furniture part 2 - the movable furniture part 2 is ejected by the drive device 1 in the opening direction OR. As a result, the movable furniture part 2 moves into the open position OS according to the second drawer from above. In this position the drawer can, for. B. be gripped over the front panel 11 and manually moved further into the position according to the first drawer from above.

In Fig. 2, a movable furniture part 2 is shown in perspective in the form of a drawer with a drawer 10 and a front panel 11. In addition, a drawer extension guide 12 with a drawer rail 13 and a body rail 14 is shown, a drawer extension guide 12 being provided on both sides of the movable furniture part 2. Furthermore, FIG. 2 shows a drive device 1. The drive device 1 is attached to the carcass rail 14. This drive device 1 (or its carrier 3) extends in the closing direction SR of the movable furniture part 2. Especially in the case of smaller or narrower drawers, it is sufficient if the movable furniture part 2 is assigned only one drive device 1 is. This can (as shown) be assigned to the right-hand drawer extension guide 12, but also to the left-hand drawer extension guide 12.

In the case of wider or larger drawers, it is advantageous, especially to avoid skewing or jamming of the drawer in the furniture body 9, if drive devices 1 and T that are synchronized with one another are provided on both sides of the movable furniture part. In addition, an arrangement 7 of a (first) drive device 1 and a second drive device T is shown in FIG. 3. These two drive devices 1 and T are connected to one another via a synchronization rod 65. Specifically, sections of the opening movement and the closing movement of the drive devices 1 and T are synchronized with one another. The first drive device 1 is mirror-symmetrical to the second drive device T. Otherwise, the drive device 1 and T are identical.

4 is an exploded perspective view of a drive device 1. This drive device 1 has an elongated carrier 3. This carrier 3 is releasably connected to the drawer rail 13. For example, snap connections or screw connections can be provided for this purpose. A heart curve-shaped guide track 52 for the locking pin 51 is formed in this carrier 3. The guide track 52 together with the locking element 53 and the locking pin 51 form the locking device 5 for the ejection device 4.

The ejection device 4 in turn has the ejection slide 41, which is located on

Ejection slide 41 movably (preferably rotatably) mounted control lever 43 and the ejection force store 42. The ejection slide 41 is mounted on the carrier 3 so as to be linearly displaceable. An axis of rotation X _{45 is} formed in the ejection slide 41. In or on this axis of rotation X ₄₅ is the control lever 43 with his

Counterpart of rotation axis 45 rotatably mounted. On the control lever 43 is the

Locking pin 51 arranged or formed. The first energy storage base 46 is formed in the ejection slide 41. The second energy storage base 47 is formed on the carrier 3. The ejection force store 42 in the form of a tension spring is attached at one end to the first energy storage base 46 and the other end to the second energy storage base 47. On the ejection slide 41 is the axis of rotation X ₄₄ for the Driver catch lever 48 formed. This driver catch lever 48 is rotatably mounted on the axis of rotation counterpart 44 in the axis of rotation X44. The driver catch lever 48 is guided via a guide element in the slide track 49 formed in the carrier 3.

The drive device 1 also has a synchronization device 6. This synchronization device 6 comprises, on the one hand, a transmission element 60 that can be moved linearly on the carrier. This transmission element 60 in turn has a carrier body 64, a first transmission stop 61, a second transmission stop 62 and a synchronization coupling element 63. The synchronization coupling element 63 has teeth 67 which are spaced apart from one another in the closing direction SR. On the other hand, the synchronization device 6 also comprises a counter-coupling coupling element 66. This counter-coupling coupling element 66 is rotatably mounted on the carrier 3. The counter-coupling coupling element 66 has a gearwheel with teeth 68. These teeth 68 mesh with the teeth 67. The synchronization rod 65 can be fastened in the receptacle 69 formed in the counter-coupling coupling element 66.

4 also shows that the synchronization coupling element 63, measured at right angles to the closing direction SR, has a smaller maximum width B ₆ 3 than the maximum width B ₆ 4 of the carrier body 64 of the transmission element 60 measured at right angles to the closing direction SR.

4 also shows that the guide track 52 has a maximum guide track width B _max measured at right angles to the closing direction SR. This maximum guide track width B _max is also shown again in FIGS. 5a and 5c. As seen in the closing direction SR, the synchronization coupling element 63 and the ejection force accumulator 42 are arranged within this guide track width B _max , as is illustrated by the dashed lines in FIG. 5a. As a result, the drive device 1 is made relatively narrow.

FIG. 5 a shows a plan view of the assembled drive device 1. The ejection force accumulator 42 is held on the two energy accumulator bases 46 and 47. The driver 15 is between the driver catch lever 48 and the ejection slide 41 captured. In the left area of FIG. 5a, the side of the synchronization coupling element 63 facing away from the teeth 67 is shown. The guide track 52 formed in the carrier 3 can be seen. The synchronization coupling element 63 is located behind the guide track 52 in the closing direction SR, while the ejection force accumulator 42 is located in front of the guide track 52 in the closing direction SR. The locking pin 51 guided in the guide track 52 is located in FIG. 5a at the very end of the guide track 52 (on the right) in a bearing section L. This position of the drive device 1 according to FIG. 5a corresponds to a completely open position OS of the movable furniture part 2.

Matching this, it can be seen in the detail according to FIG. 5b that the locking pin 51 formed on the control lever 43 is located in the bearing section L.

FIG. 5c shows a plan view of part of the drive device 1 according to FIG. 5a, the right-hand area and the ejection slide 41 not being shown. The locking pin 51 is located in the bearing section L of the guide track 52. The guide track 52 also has the closing section C, in which the locking pin 51 is movable when the movable furniture part 2 is closed. This is followed by the latching section E, in which the locking pin 51 can be moved after leaving the closing section C. This is followed by the overpressure section U. This in turn is followed by the opening section O, in which the locking pin 51 can be moved when the movable furniture part 2 is opened or pushed out. This opening section O finally merges again into the bearing section L or into the closing section C. In the left-hand area of FIG. 5c, in addition to the rear side of the synchronization coupling element 63, a tooth 68 of the synchronization coupling counter element 66 can also be seen.

In FIG. 6a, the movable furniture part 2 has moved in the closing direction SR, but is still in an open position OS. As a result of the closing movement, the driver 15 assigned to the movable furniture part 2 is moved in the closing direction SR and thereby takes the ejector slide 41 with it. As a result, the ejection slide 41 moves relative to the carrier 3 and the ejection force store 42 is tensioned. In the detail according to FIG. 6 b it can be seen that the locking pin 51 is no longer located in the bearing section L, but in the closing section C of the guide track 52.

According to FIG. 7a, the movable furniture part 2 and, with it, the ejection slide 41 have moved even further in the closing direction SR. The movable furniture part 2 is still in the open position OS. The ejection force store 42 was stretched even further.

In the detail according to FIG. 7 b, the locking pin 51 has moved so far in the closing section C that the locking pin 51 strikes the second transmission stop 62 protruding into the guide track 52. Specifically, the transmission element 60 of the synchronization device 6 has this second transmission stop 62 protruding into the closing section C of the guide track 52. The second transmission stop 62 is in the stop position A.

In Fig. 7c, the drive device 1 can again be seen with the ejection slide 41 hidden.

According to FIG. 8a, the movable furniture part 2 has been moved further in the closing direction SR, but the closed position SS has just not been reached. Accordingly, the movable furniture part 2 is still in the open position OS. The ejection force store 42 is almost completely tensioned.

Because the locking pin 51 rests on the second transmission stop 62 in the stop position A, the transmission element 60 can be moved from the locking pin 51 via this second transmission stop 62 during the closing movement (from FIG. 7a to FIG. 8a). The second transmission stop 62 can be moved by the locking pin 51 from the stop position A into the (recessed) evasive position W (see dashed line in Fig. 8b), in which the second transmission stop 62 no longer protrudes into the guide track 52 and the locking pin 51 moves away from the second transmission stop 62 releases. This movement of the second transmission stop 62 into the evasive position W enables a further movement of the locking pin 51 into the latching section E. In Fig. 8c it can be seen that (exclusively) by the movement of the transmission element 60 triggered by the locking movement of the locking pin 51 via the second transmission stop 62, the locking element 53 (formed on the transmission element 60) can be moved into a latching recess formation position in which the locking element 53 is the Locking recess R of the guide track 52 forms. Simultaneously with this movement of the transmission element 60, the synchronization coupling element 63 is also moved, which in turn triggers a rotary movement of the synchronization coupling counter element 66. This rotary movement is transmitted to a second drive device V via the synchronization rod 65. This last movement section of the closing movement in the closing section C is thus synchronized.

According to FIG. 9a, the movable furniture part 2 has been moved even further in the closing direction SR, whereby the closed position SS is reached. The ejection force store 42 is fully tensioned.

As can be seen in FIGS. 9b and 9c, the locking pin 51 has even moved into the push-through protection channel D of the guide track 52. The transmission element 60 stands still during this (push-through) movement. This means that there is no synchronization or movement transmission to the second drive device V.

If, in this position according to FIGS. 10a to 10c, the user stops pressing on the movable furniture part 2, the ejection force store 42 can relax slightly and moves the ejection slide 41 slightly in the opening direction OR so that the locking pin 51 moves along the latching section E moves until the locking pin 51 engages in the locking recess R. This gives the locking position VS of the locking device 5, as shown in FIGS. 5a, 5b and 5c. The latching recess R is formed by the last area of the latching section E and by the folding surface F1 of the locking element 53. During this movement of the locking pin 51 in the latching section E, the transmission element 60 is also at a standstill. This means that there is no synchronization or movement transmission to the second drive device V. FIGS. 11 a, 11 b and 11 c show the overpressure movement. If the movable furniture part 2, which is in the closed position SS according to FIGS. 10a to 10c, is pressed in the closing direction SR, the movable furniture part 2 moves into the overpressed position ÜS. This pushing movement of the movable furniture part 2 is transmitted by the driver 15 to the ejection slide 41 of the ejection device 4 and to the control lever 43 connected to the ejection slide, so that the locking pin 51 formed on the control lever 43 is released from the latching recess R, is deflected by the deflecting bevel 54 and in the overpressure section U (including

Overpressure channel) of the guide track 52 arrives. This distraction becomes the

Control lever 43 is pivoted even further counterclockwise. The locking position VS is canceled. The locking device 5 is unlocked. The transmission element 60 also stands still during this overpressing movement.

If in this overpressure position ÜS according to FIGS. 11a to 11c the user stops pressing on the movable furniture part 2, the can

Relax the ejection force accumulator 42 because the locking pin 51 is no longer locked. As a result of this relaxation, the ejection slide 41 and, with it, the locking pin 51 are moved along the opening section O of the guide track 52. During this movement, the locking pin 51 first strikes the end face S formed on the locking element 51. In FIG. 12b, it strikes

Locking pin 51 straight onto this end face S. In FIG. 12c, the locking pin 51 has already moved the locking element 53 slightly over the end face S in the opening direction OR. The first transmission stop 61 is formed by this end face S, which is formed on the locking element 53 and oriented transversely to the folded surface F1. Through this first transmission stop 61 protruding into the opening section O of the guide track 52, the transmission element 60 can be moved by the locking pin 51 during the opening movement. This opening movement is therefore synchronized or movement is transmitted to the second drive device V. If, for whatever reasons, no unlocking has taken place in the second drive device V despite the moving furniture part 2 being pushed over, this synchronization moves the locking element 53 of the second drive device V in the opening direction OR, so that this locking element 53 does not have the latching recess R. more and the locking pin 51 of the second drive device V is unlocked. In FIGS. 13a, 13b and 13c the ejection force accumulator 42 has relaxed a little further, so that the open position OS of the movable furniture part 2 is reached. The locking pin 51 still rests against the end face S of the locking element 53, but is already deflected from this inclined end face S by the gap between the locking element 53 and the peninsular area 55 of the guide track 52. The movement of the transmission element 60 and thus the synchronization of the second drive device V is complete.

In FIGS. 14a, 14b and 14c, the ejection force accumulator 42 has relaxed even further. The locking pin 51 has moved completely through the gap 56.

If, starting from this position according to FIGS. 14a to 14c - in which the ejection movement by the ejector 4 actually takes place - is inadvertently pressed in the closing direction SR on the movable furniture part 2, the locking pin 51 cannot move back in due to the formation of the opening section O. reach the overpressure section U or the locking recess R. For this reason, the guide track 52 has the freewheeling channel F shown in FIG. In these, the locking pin 51 can move non-destructively in the event of an erroneous closing movement that is too early.

In FIGS. 16a, 16b and 16c, the ejection or opening movement is almost complete. The locking pin 51 is located in the last area of the opening section O. The ejection force accumulator 42 is almost completely relaxed or discharged.

Finally, the movable furniture part 2 and the drive device 1 return to the position shown in FIGS. 5a to 5c. If, in this position, a user continues to pull on the movable furniture part 2 in the opening direction OR, the driver catch lever 48 is rotated counterclockwise about the axis of rotation X ₄₄ due to the curved design of the link path 49. As a result, the driver 15 is no longer caught between the ejection slide 41 and the driver catch lever 48. The movable furniture part 2 can be moved freely. The drive device 1 stands still and is not influenced by the movable furniture part 2.

List of reference symbols:

1 (first) drive device

1 ‘second drive device

2 movable furniture part

3 carriers

4 ejector

41 discharge carriage

42 ejection force accumulator

43 control levers

44 Counterpart of rotation axis

45 Counterpart of rotation axis

46 first lift mechanism base

47 second lift mechanism base

48 Driver catch lever

49 slide track

5 locking device

51 locking pin

52 guideway

53 locking element

54 deflection slope

55 peninsular area

56 gap

6 Synchronization device

60 transmission element

61 first transmission stop

62 second transmission stop

63 Synchronization coupling element

64 carrier bodies

65 synchronization rod

66 Counter-coupling coupling elements

67 teeth

68 teeth

69 Recording 7 arrangement

8 furniture

9 furniture body

10 drawer

11 front panel

12 drawer extension runners

13 shop rail

14 cabinet rail

15 carriers

16 Retraction Device

SS closed position

OS open position

ÜS overpressure

VS locking position

R locking recess

H holding surface

0 opening section

S face

C closing section

A stop position

W alternative position

E snap-in section

U overpressure section

L warehouse section

D push-through protection channel

F freewheeling channel

SR closing direction

OR opening direction

B _max maximum guideway width

B ₆ 3 maximum width of the synchronization coupling element

B ₆ 4 maximum width of the carrier body

X ₄₄ axis of rotation

X45 axis of rotation

Claims

1. Drive device (1) for a movable furniture part (2), in particular for a drawer, with

- a carrier (3),

- An ejector device (4) for ejecting the movable furniture part (2) from a closed position (SS) into an open position (OS), the ejector device (4) being moved into a position behind the closed position (SS) by pushing over the movable furniture part (2) horizontal overpressure position (ÜS) can be unlocked from a locking position (VS),

- A locking device (5) for locking the ejection device (4) in the locking position (VS), the locking device (5) having a locking pin (51) connected to the ejection device (4) and a locking pin (51) formed at least partially in or on the carrier (3) Has guide track (52) for the locking pin (51), the locking pin (51) being locked in the locking position (VS) in a latching recess (R) of the guide track (52), and

- A synchronization device (6) movable relative to the carrier (3) for synchronizing the movement of the drive device (1) with a second drive device (T), the synchronization device (6) having a transmission element (60) movable from the locking pin (51), wherein the transmission element (60) at least in the

The overpressure movement is stationary, can be moved through the locking pin (51) during an opening movement and can be moved through the locking pin (51) during a closing movement,

characterized in that the transmission element (60) is mounted on the carrier (3) so as to be linearly movable.

2. Drive device according to claim 1, characterized in that on

Transmission element (60) a locking element (53) which forms the guide track (52) for the locking pin (51) is arranged.

3. Drive device according to claim 2, characterized in that the

Locking pin (51) in the locked position (VS) in the locking recess (R) the guide track (52) is locked, the latching recess (R) being at least partially formed by the locking element (53) movable relative to the carrier (3) and the locking pin (51) in the locking position (VS) on the locking element (53), preferably is held on a holding surface (H) formed on the locking element (53).

4. Drive device according to one of claims 1 to 3, characterized in that the transmission element (60) has a first transmission stop (61) protruding into an opening section (0) of the guide track (52), the transmission element (60) during the opening movement can be moved from the locking pin (51) via this first transmission stop (61).

5. Drive device according to claim 4, characterized in that the first transmission stop (61) is formed by an end face (S) formed on the locking element (53) and preferably oriented transversely to the holding surface (H).

6. Drive device according to one of claims 1 to 5, characterized in that the transmission element (60) has a second transmission stop (62) protruding into a closing section (C) of the guide track (52), the transmission element (60) during the closing movement can be moved from the locking pin (51) via this second transmission stop (62).

7. Drive device according to claim 6, characterized in that, preferably exclusively, by the movement of the transmission element (60) triggered by the locking pin (51) via the second transmission stop (62) during the closing movement, the locking element (53) can be moved into a latching recess formation position, in which the locking element (53) forms the latching recess (R) of the guide track (52).

8. Drive device according to claim 6 or 7, characterized in that the second transmission stop (62) can be moved by the locking pin (51) from a stop position (A) into an evasive position (W) in which the locking pin (51) is from the second Transmission stop (62) releases.

9. Drive device according to claim 8, characterized in that by moving the second transmission stop (62) into the evasive position (W), a further movement of the locking pin (51) into a latching section (E) is released.

10. Drive device according to claim 9, characterized in that the transmission element (60) stands still when the locking pin (51) moves in the latching section (E) and in a press-over section (U).

11. Drive device according to one of claims 1 to 10, characterized in that the synchronization device (6) has a synchronization coupling element (63) connected to the transmission element (60).

12. Drive device according to one of claims 4 to 11, characterized in that the transmission element (60) has a carrier body (64), wherein the first transmission stop (61), the second transmission stop (62) and / or the synchronization coupling element (63 ) are formed in one piece with the carrier body (64).

13. Arrangement (7) with

- a drive device (1) according to one of claims 1 to 12,

- A second drive device (1 ') according to one of claims 1 to 12 and

- A synchronization rod (65) for connecting the synchronization devices (6), in particular synchronization counter-coupling elements (66), of the two drive devices (1, T).

14. Furniture (8) with a furniture body (9), at least one furniture part (2) movable relative to the furniture body (9) and a drive device (1) according to one of claims 1 to 12 or an arrangement (7) according to claim 13.