Drive device for a movable furniture part
By positioning the synchronizing coupling element and ejection force storage device within the guide track width, the drive device achieves a narrow design and simplified production, addressing the space and complexity issues of existing devices.
Patent Information
- Authority / Receiving Office
- EP · EP
- Patent Type
- Patents
- Current Assignee / Owner
- JULIUS BLUM GMBH
- Filing Date
- 2020-01-31
- Publication Date
- 2026-07-01
AI Technical Summary
Existing furniture drive devices are wide and require significant space due to the lateral arrangement of synchronizing teeth and energy storage devices, complicating design and production.
The drive device is designed with a synchronizing coupling element and ejection force storage device positioned within the guide track width, ensuring they do not exceed the maximum guideway width, allowing for a narrow design and simplified production.
The solution results in a compact drive device that requires minimal space, simplifies production, and allows for standardized inventory management by using a single type of drive device that can be used individually or synchronized with another.
Smart Images
Figure IMGF0001 
Figure IMGF0002 
Figure IMGF0003
Abstract
Description
[0001] The present invention relates to a drive device for a movable furniture part, in particular for a drawer, according to the preamble of claim 1. The invention further relates to an arrangement with two synchronized drive devices. In addition, the invention relates to a piece of furniture with such a drive device.
[0002] For many years, furniture fittings have been manufactured and used to support the movement of movable furniture parts (such as drawers, cabinet doors, and cabinet flaps). A well-known example is the touch-latch mechanism, which triggers an opening movement by pressing on the movable furniture part. Pressing ("touch") on the movable furniture part, which is in the closed position, releases a latch, allowing the ejector mechanism to open the movable furniture part.
[0003] An example of such a furniture fitting or drive device is described in WO 2017 / 004638 A1. After being pressed over at the beginning of the opening movement, the locking pin moves a locking element formed on the partially sleeve-shaped synchronizing coupling. This synchronizing coupling corresponds to the transmission element of the present invention. A disadvantage of this design is that the carrier is relatively wide because the synchronizing teeth are located laterally next to the guide track.
[0004] The same applies to EP 3 054 811 B1. In this case, the coupling element corresponds to the transmission element of the present invention. The synchronizing teeth arranged on the coupling element are located laterally next to the guide track.
[0005] Drive devices that are relatively wide are also described in DE 10 2016 113 043 A1 and DE 10 2016 120 586 A1. The actuating element shown in the first-mentioned document partially corresponds to the transmission element of the present invention. The web arranged on this actuating element can be interpreted as a synchronizing coupling element. A disadvantage of such a drive device is its relatively wide design. Firstly, the web arranged on the actuating element is wider than the rest of the actuating element. More importantly, however, the energy storage devices are located laterally next to the guide track.
[0006] Another drive device is known from the document DE 20 2015 001 186 U1.
[0007] The object of the present invention is therefore to create a drive device that is an alternative to or improved upon the prior art. In particular, the drive device should be as narrow as possible. Furthermore, the drive device should have a simple design, require relatively little space, and comprise few components.
[0008] This is achieved by a drive device with the features of claim 1. According to the invention, the guide track has a maximum guide track width measured perpendicular to the closing direction, with the synchronizing coupling element and the ejection force storage device arranged within this guide track width when viewed in the closing direction. This enables a relatively narrow design, with the endpoints of the maximum guide track width each arranged in a boundary plane that is oriented perpendicular to the maximum guide track width, the boundary planes being arranged parallel to each other, the synchronizing coupling element and the ejection force storage device being arranged entirely between these boundary planes, and the transmission element being linearly movable in the closing direction.
[0009] This means that neither the synchronizing coupling element nor the ejector energy storage device is wider than the maximum guideway width. Furthermore, they do not extend beyond the maximum guideway width when viewed in the closing direction. In other words, the synchronizing coupling element and the ejector energy storage device lie within a plane defined by the maximum guideway width and the closing direction. Put another way, the endpoints of the maximum guideway width are each located in a boundary plane that is perpendicular to the maximum guideway width. These two boundary planes are parallel to each other. The synchronizing coupling element and the ejector energy storage device are located entirely between these boundary planes. Other components of the drive device may be located, at least partially, outside these boundary planes.
[0010] Preferred embodiments of the invention are defined in the dependent claims.
[0011] According to the invention, the synchronization coupling element is arranged behind the guide track on the carrier in the closing direction.
[0012] The ejection force storage device can be positioned above, below, or behind the guide track in its installed position. However, it is preferred that the ejection force storage device be positioned in front of the guide track in the closing direction. To enable a narrow design of the drive device, it is preferred that, viewed in the closing direction, the transmission element is arranged within the width of the guide track.
[0013] It is also preferably provided that the synchronization coupling element has a smaller maximum width, measured perpendicular to the closing direction, than the maximum width of the transmission element, measured perpendicular to the closing direction.
[0014] The design of the guide track is arbitrary. Preferably, the guide track has a heart-shaped section. For example, the locking pin can be locked in the detent recess of the guide track in the locked position, the detent recess being at least partially formed by a locking element movable relative to the carrier, and the locking pin being held by the locking element in the locked position. It is particularly preferred that the locking element be arranged on the transmission element.
[0015] In principle, it is possible for the transmission element to be rotatably mounted on the carrier. However, according to the invention, the transmission element is provided to be linearly movable in the closing direction, which is advantageous for a narrow design of the drive device.
[0016] The synchronizing coupling element can be designed in the form of a lever. However, it is preferred that the synchronizing coupling element has several teeth spaced apart from each other in the closing direction.
[0017] Accordingly, the synchronization device is provided to have a synchronization coupling counter element rotatably mounted on the carrier, preferably gear-shaped, which can be coupled to the synchronization coupling element in a motion-transmitting manner.
[0018] The drive device described so far does not necessarily need to be used for synchronization or for transferring motion to a second drive device. Rather, such a drive device can also be installed individually (and on one side) in a piece of furniture. While this drive device then (somewhat unnecessarily) includes the components for synchronization, it is advantageous because only one type of drive device (i.e., always with synchronization components) needs to be produced. This simplifies, for example, inventory management and streamlines or standardizes production.
[0019] However, protection is sought not only for a single drive device, but also for an arrangement comprising a (first) drive device according to the invention and a second drive device according to the invention synchronized with it. Preferably, this arrangement also includes a synchronizing rod for connecting the synchronizing devices, in particular the synchronizing coupling elements, of the two drive devices.
[0020] Furthermore, protection is sought for a piece of furniture comprising a furniture body, at least one furniture part movable relative to the furniture body, and a drive device according to the invention or an arrangement with two drive devices. It is preferred that these two drive devices are mounted on opposite sides of the furniture body or the movable furniture part.
[0021] The drive mechanism supports can be attached to the movable furniture part (or to a drawer slide of a drawer runner), in which case the ejection devices, along with the movable furniture part, are pushed away by (the furniture carcass) carriers. Preferably, however, the drive mechanism supports are attached to the furniture carcass (preferably each to a carcass rail of a drawer runner), with the ejection devices moving the movable furniture part relative to the furniture carcass in the opening direction via (the movable furniture part) carriers.
[0022] Further details and advantages of the present invention are explained in more detail below with reference to the description of the figures and the exemplary embodiments shown in the drawings. These show: Fig. 1 schematically a piece of furniture with several movable furniture parts in the form of drawers, Fig. 2 perspective view of a drawer with drawer slides and a drive device for a movable furniture part, Fig. 3 an arrangement of two synchronized drive devices, Fig. 4 perspective exploded view of the drive device, Figs. 5a-5c various views of the drive device in the open position, Figs. 6a-6b various views of the drive device when closing, Figs. 7a-7c various views of the drive device when the locking pin strikes the second transmission stop, Figs. 8a-8c various views of the drive device when the locking pin releases from the second transmission stop, Figs. 9a-9c various views of the drive device in the closed position, Figs. 10a-10c various views of the drive device in the locked position, Figs. 11a-11c various views of the drive device in the overpressure position, Fig.Figs. 12a-12c: Various views of the drive device when the locking pin strikes the first transmission stop; Figs. 13a-13c: Various views of the drive device when the locking pin releases from the first transmission stop; Figs. 14a-14c: Various views of the drive device during the ejection movement; Fig. 15: A top view of part of the drive device with the locking pin in the free-running channel; and Figs. 16a-16c: Various views of the drive device in the open position.
[0023] In Fig. 1 The figure shows a piece of furniture 8 with a furniture carcass 9 and a total of four movable furniture parts 2. Each furniture part 2 consists of at least a drawer 10 and a front panel 11. The movable furniture parts 2 are attached to the furniture carcass 9 via a drawer slide 12, consisting of a drawer rail 13 and a carcass rail 14 (and optionally a center rail not shown).
[0024] The top drawer is schematically shown with a drive device 1. The drive device 1 has a support 3. . In this case, this support 3 is attached to the loading rail 13 (in the schematic representation according to Fig. 1 The support 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 unit 42 of this ejection device 4 being shown schematically. The locking device 5 has a guide track 52 formed in the support and the locking pin 51 guided in the (in this case heart-shaped) guide track 52. A driver 15 is arranged on the cabinet rail 14 (or on the furniture cabinet 9 itself), with which the ejection device 4 engages at least partially. However, the arrangement can also be reversed: that is, the drive device 1 is associated with the cabinet rail 14, while the driver 15 is associated with the movable furniture part 2. This top drawer is in the open position OS.
[0025] When the drawer is moved from its open position OS in the closing direction SR, the locking pin 51 moves in the closing section C of the guide track 52 (see below for details). During this movement, the ejection force accumulator 42 is tensioned by a relative movement between the ejection slide 41 and the support 3.
[0026] In the closed position (third drawer from the top), the ejection force storage unit 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 into the extension guide 12.
[0027] Starting from this closed position SS, the movable furniture part 2 is moved into the overpressure position ÜS (bottom drawer in) by pressing on the movable furniture part 2. Fig. 1 This unlocks the locking device 5. After the over-pressing action in the closing direction SR, and as soon as the user releases the movable furniture part 2, the drive device 1 ejects the movable furniture part 2 in the opening direction OR. This brings the movable furniture part 2 into the open position OS corresponding to the second drawer from the top. In this position, the drawer can be accessed, for example, by grasping the front panel 11 and manually moved further into the position corresponding to the first drawer from the top.
[0028] In Fig. 2 A movable furniture part 2 in the form of a drawer with a drawer compartment 10 and a front panel 11 is shown in perspective. A drawer slide 12 with a drawer rail 13 and a cabinet rail 14 is also shown, with a drawer slide 12 provided on both sides of the movable furniture part 2. Furthermore, Fig. 2 A drive device 1. The drive device 1 is attached to the cabinet rail 14. This drive device 1 (or its support 3) extends in the closing direction SR of the movable furniture part 2. Especially with smaller or narrower drawers, it is sufficient if only one drive device 1 is assigned to the movable furniture part 2. This can be assigned (as shown) to the right-hand drawer slide 12, but also to the left-hand drawer slide 12.
[0029] For wider or larger drawers, it is advantageous – especially to prevent misalignment or jamming of the drawer in the furniture carcass 9 – to provide synchronized drive devices 1 and 1' on both sides of the movable furniture part. A suitable [device / component] is shown in Fig. 3 An arrangement 7 consisting of a (first) drive device 1 and a second drive device 1' is shown. These two drive devices 1 and 1' are connected to each other via a synchronizing rod 65. Specifically, sections of the opening and closing movements of the drive devices 1 and 1' are synchronized with each other. The first drive device 1 is designed as a mirror image of the second drive device 1'. Otherwise, the drive devices 1 and 1' are identical.
[0030] Fig. 4 This is a perspective exploded view of a drive device 1. This drive device 1 has an elongated support 3. This support 3 is detachably connected to the loading rail 13. For example, snap connections or screw connections can be provided for this purpose. A heart-shaped guide track 52 for the locking pin 51 is formed in this support 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.
[0031] The ejection device 4 comprises the ejection slide 41, the control lever 43 which is movably (preferably rotatably) mounted on the ejection slide 41, and the ejection energy storage device 42. The ejection slide 41 is mounted linearly displaceable on the support 3. A pivot axis X 45 is formed in the ejection slide 41. The control lever 43 and its pivot axis counterpart 45 are rotatably mounted in or on this pivot axis X 45. The locking pin 51 is arranged on or formed on the control lever 43. The first energy storage base 46 is formed in the ejection slide 41. The second energy storage base 47 is formed on the support 3. The ejection energy storage device 42, in the form of a tension spring, is attached at one end to the first energy storage base 46 and at the other end to the second energy storage base 47. The pivot axis X 44 for the driver-catching lever 48 is formed on the ejection slide 41.This drive-lock lever 48 is rotatably mounted in the pivot axis X44 via the pivot-axis counterpart 44. The drive-lock lever 48 is guided by a guide element in the cam track 49 formed in the carrier 3.
[0032] The drive device 1 also includes a synchronizing device 6. This synchronizing device 6 comprises, on the one hand, a transmission element 60 that is linearly movable 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 synchronizing coupling element 63. The synchronizing coupling element 63 has teeth 67 spaced apart from each other in the closing direction SR. On the other hand, the synchronizing device 6 also includes a synchronizing coupling counter-element 66. This synchronizing coupling counter-element 66 is rotatably mounted on the carrier 3. The synchronizing coupling counter-element 66 has a gear with teeth 68. These teeth 68 mesh with the teeth 67. The synchronizing rod 65 can be attached in the receptacle 69 formed in the synchronizing coupling counter-element 66.
[0033] Out of Fig. 4 It is also evident that the synchronization coupling element 63, measured perpendicular to the closing direction SR, has a smaller maximum width B 63 than the maximum width B 64 of the carrier body 64 of the transmission element 60, measured perpendicular to the closing direction SR.
[0034] Out of Fig. 4 It also shows that the guide track 52 has a maximum guide track width B max measured perpendicular to the closing direction SR. This maximum guide track width B max is also shown again in the Fig. 5a und 5c shown. Viewed in the closing direction SR, the synchronization coupling element 63 and the ejection force storage unit 42 are arranged within this guide track width B max, as shown in Fig. 5a This is illustrated by the dashed lines. As a result, the drive device 1 is relatively narrow.
[0035] Fig. 5a Figure 1 shows a top view of the assembled drive device 1. The ejection energy storage unit 42 is held at the two energy storage bases 46 and 47. The driver 15 is caught between the driver catch lever 48 and the ejection slide 41. In the left area of Fig. 5a The side of the synchronizing coupling element 63 facing away from the teeth 67 is shown. The guide track 52 formed in the carrier 3 is visible. The synchronizing coupling element 63 is located behind the guide track 52 in the closing direction SR, while the ejection force storage unit 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 (right-hand) end of the guide track 52 in a bearing section L. This position of the drive device 1 according to Fig. 5a corresponds to a complete exposure of the OS of the movable furniture part 2.
[0036] This is appropriate in detail according to Fig. 5b It can be seen that the locking pin 51 formed on the control lever 43 is located in the bearing section L.
[0037] Fig. 5c shows a top view of part of the drive device 1 according to Fig. 5a , whereby the right-hand section and the ejection slide 41 are not 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 during a closing movement of the movable furniture part 2. This is followed by the detent section E, in which the locking pin 51 is movable after leaving the closing section C. This is followed by the overpressure section U. The opening section O is connected to this, in which the locking pin 51 is movable when opening or ejecting the movable furniture part 2. This opening section O finally transitions back into the bearing section L or into the closing section C. In the left-hand section of Fig. 5c In addition to the back of the synchronization coupling element 63, a tooth 68 of the synchronization coupling counter element 66 is also visible.
[0038] In Fig. 6a The movable furniture part 2 has moved in the closing direction SR, but is still in an open position OS. The closing movement moves the driver 15 associated with the movable furniture part 2 in the closing direction SR, thereby engaging the ejection carriage 41. This causes the ejection carriage 41 to move relative to the carrier 3, and the ejection force accumulator 42 is tensioned.
[0039] In detail according to Fig. 6b 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.
[0040] According to Fig. 7a The movable furniture part 2, and with it the ejection slide 41, has moved even further in the closing direction SR. However, the movable furniture part 2 is still in the open position OS. The ejection force storage unit 42 has been tensioned even further.
[0041] In detail according to Fig. 7b The locking pin 51 has moved so far in the locking section C that it abuts the second transmission stop 62 projecting into the guide track 52. Specifically, the transmission element 60 of the synchronizing device 6 has this second transmission stop 62 projecting into the locking section C of the guide track 52. The second transmission stop 62 is in stop position A.
[0042] In Fig. 7c The drive device 1 with the ejection slide 41 hidden is again visible.
[0043] According to Fig. 8a The movable furniture part 2 was moved further in the closing direction SR, but the closed position SS has not yet been reached. Therefore, the movable furniture part 2 is still in the open position OS. The ejection force storage unit 42 is almost fully compressed.
[0044] Because the locking pin 51 rests against the second transmission stop 62 in stop position A, the transmission element 60 is engaged during the closing movement (from Fig. 7a on Fig. 8a ) is movable via this second transmission stop 62 from the locking pin 51. The second transmission stop 62 is movable by the locking pin 51 from the stop position A to the (recessed) escape position W (see dashed line in Fig. 8b ), in which the second transmission stop 62 no longer projects into the guide track 52 and the locking pin 51 disengages from the second transmission stop 62. This movement of the second transmission stop 62 into the escape position W allows further movement of the locking pin 51 into the detent section E.
[0045] In Fig. 8c It is evident that (exclusively) the movement of the transmission element 60, triggered during the closing movement by the locking pin 51 via the second transmission stop 62, moves the locking element 53 (formed on the transmission element 60) into a detent-forming position, in which the locking element 53 forms the detent recess R of the guide track 52. Simultaneously with this movement of the transmission element 60, the synchronizing coupling element 63 is also moved, which in turn triggers a rotary movement of the synchronizing coupling counter-element 66. This rotary movement is transmitted via the synchronizing rod 66 to a second drive device 1'. Thus, this last movement segment of the closing movement is synchronized in the closing section C.
[0046] According to Fig. 9a The movable furniture part 2 was moved further in the closing direction SR, thus reaching the closed position SS. The ejection force storage unit 42 is fully compressed.
[0047] As in the Fig. 9b und 9c As can be seen, the locking pin 51 has even moved into the push-through protection channel D of the guide track 52. The transmission element 60 remains stationary during this (push-through) movement. This means that no synchronization or motion transmission to the second drive device 1' takes place.
[0048] If in this position according to the Fig. 10a bis 10c When the user stops pressing on the movable furniture part 2, the ejection force accumulator 42 can relax slightly, thereby moving the ejection slide 41 slightly in the opening direction OR, so that the locking pin 51 moves along the detent section E until the locking pin 51 engages in the detent recess R. This establishes the locking position VS of the locking device 5, as shown in the Fig. 5a, 5b und 5c The detent recess R is formed by the last part of the detent section E and by the holding surface H of the locking element 53. Even during this movement of the locking pin 51 in the detent section E, the transmission element 60 remains stationary. This means that no synchronization or motion transmission to the second drive device 1' takes place.
[0049] The Fig. 11a, 11b und 11c show the overpressure movement. If the SS is in the closed position according to the Fig. 10a bis 10c When the movable furniture part 2 is pressed in the closing direction SR, it enters the overpressure position ÜS. This overpressure 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, causing the locking pin 51 formed on the control lever 43 to release from the detent recess R, be deflected by the deflection ramp 54, and enter the overpressure section U (including the overpressure channel) of the guide track 52. This deflection causes the control lever 43 to pivot further counterclockwise. The locking position VS is released. The locking device 5 is unlocked. The transmission element 60 remains stationary even during this overpressure movement.
[0050] If in this overpressure position ÜS according to the Fig. 11a bis 11c When the user stops pressing on the movable furniture part 2, the ejection force accumulator 42 can release its pressure, as the locking pin 51 is no longer locked. This release causes the ejection carriage 41, and with it the locking pin 51, to move along the opening section O of the guide track 52. During this movement, the locking pin 51 first encounters the end face S formed on the locking element 51. Fig. 12b The locking pin 51 just meets this end face S. Fig. 12c The locking pin 51 has already moved the locking element 53 slightly in the opening direction OR via the end face S. The first transmission stop 61 is formed by this end face S, which is oriented transversely to the holding surface H and is formed on the locking element 53. This first transmission stop 61, which projects into the opening section O of the guide track 52, allows the transmission element 60 to move from the locking pin 51 during the opening movement. Thus, synchronization or transmission of this opening movement to the second drive device 1' takes place.If, despite the over-pressing of the movable furniture part 2, no unlocking has yet taken place in the second drive device 1' - for whatever reason, this synchronization moves the locking element 53 of the second drive device 1' in the opening direction OR, so that this locking element 53 no longer forms the detent recess R and the locking pin 51 of the second drive device 1' is unlocked.
[0051] In the Fig. 13a, 13b und 13c The ejection force storage unit 42 has relaxed a little further, so that the open position OS of the movable furniture part 2 has been reached. The locking pin 51 is still in contact with 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 peninsula-shaped area 55 of the guide track 52. The movement of the transmission element 60 and thus the synchronization of the second drive device 1' is complete.
[0052] In the Fig. 14a, 14b und 14c The ejection force storage unit 42 has relaxed even further. The locking pin 51 has moved completely through the gap 56.
[0053] If, starting from this position according to the Fig. 14a bis 14c - in which the ejection movement by the ejection device 4 actually takes place - is mistakenly pressed in the closing direction SR onto the movable furniture part 2, the locking pin 51 cannot return to the overpressure section U or the detent recess R due to the design of the opening section O. For this reason, the guide track 52 has the Fig. 15 The free-running channel F shown is located within this channel. In this channel, the locking pin 51 can move without damage in the event of an accidental, premature closing movement.
[0054] In the Fig. 16a, 16b und 16c The ejection or opening movement is almost complete. The locking pin 51 is located in the last part of the opening section O. The ejection energy storage unit 42 is almost completely relaxed or discharged.
[0055] Finally, the movable furniture part 2 and the drive device 1 return to their positions according to the Fig. 5a bis 5cIf, in this position, a user continues to pull on the movable furniture part 2 in the opening direction OR, the drive lever 48 is rotated counterclockwise around the axis of rotation X 44 due to the curved design of the cam track 49. As a result, the drive 15 is no longer trapped between the ejector carriage 41 and the drive lever 48. The movable furniture part 2 can now move freely. The drive mechanism 1 remains stationary and is not affected by the movable furniture part 2. Reference symbol list:
[0056] 1 (First) drive device 1' Second drive device 2 Movable furniture part 3 Support 4 Ejection device 41 Ejection slide 42 Ejection energy storage 43 Control lever 44 Rotary axis counterpart 45 Rotary axis counterpart 46 First energy storage base 47 Second energy storage base 48 Carrier catch lever 49 Slide track 5 Locking device 51 Locking pin 52 Guide track 53 Locking element 54 Deflection ramp 55 Peninsula-shaped area 56 Gap 6 Synchronizing device 60 Transmission element 61 First transmission stop 62 Second transmission stop 63 Synchronizing coupling element 64 Support body 65 Synchronizing rod 66 Synchronizing coupling counterparts 67 Teeth 68 Teeth 69 Mount 7 Arrangement 8 Furniture 9 Furniture carcass 10 Drawer compartment 11 Front panel 12 Drawer extension guide 13 Drawer rail 14 Carcass rail 15 Drive unit 16 Pull-in device SS Closed position OS Open position ÜS Overpressure position VS Locking position R Recess H Holding surface O Opening section SS Front surface C Closing sectionA Stop position W Evasion position E Latching section U Overpressure section L Bearing section D Push-through protection channel F Freewheel channel SR Closing direction OR Opening direction B max Maximum guide track width B 63 Maximum width of the synchronization coupling element B 64 Maximum width of the carrier body X 44 Axis of rotation X 45 Axis of rotation
Claims
1. A drive device (1) for a moveable furniture part (2), in particular for a drawer, comprising - a carrier (3) which extends in the closing direction (SR) of the moveable furniture part (2), - an ejection device (4) for ejecting the moveable furniture part (2) out of a closed position (SS) into an open position (OS), wherein the ejection device (4) has an ejection slide (41) moveable relative to the carrier (3) and an ejection force storage means (42) fixed on the one hand to the carrier (3) and on the other hand to the ejection slide (41), wherein the ejection device (4) is unlockable out of a locking position (VS) by an overpressing movement of the moveable furniture part (2) into an overpressing position (ÜS) behind the closed position (SS), - a locking device (5) for locking the ejection device (4) in the locking position (VS), wherein the locking device (5) has a locking pin (51) connected to the ejection device (4) and a guide track (52) provided at least partially in or on the carrier (3) for the locking pin (51), wherein the locking pin (51) in the locking position (VS) is locked in a latching recess (R) in the guide track (52), and - a synchronization device (6) for synchronizing the movement of the drive device (1) with a second drive device (1'), wherein the synchronization device (6) has a transmission element (60) which is mounted moveably to the carrier (3) and is moveable by the locking pin (51), and a synchronization coupling element (63) connected to the transmission element (60), wherein the guide track (52) has a maximum guide track width (Bmax) measured at a right angle to the closing direction (SR), wherein viewed in the closing direction (SR) the synchronization coupling element (63) and the ejection force storage means (42) are arranged within said guide track width (Bmax), wherein the end points of the maximum guide track width (Bmax) are respectively arranged in a limit plane oriented at a right angle to the maximum guide track width (Bmax), wherein those two limit planes are parallel to each other, wherein the synchronization coupling element (63) and the ejection force storage means (42) are disposed entirely between those limit planes, characterized in that the transmission element (60) is moveable linearly in the closing direction (SR), characterized in that the synchronization coupling element (63) is arranged in the closing direction (SR) behind the guide track (52) on the carrier (3).
2. The drive device as set forth in claim 1, characterized in that the ejection force storage means (42) is arranged in front of the guide track (52) in the closing direction (SR) .
3. The drive device as set forth in one of claims 1 or 2, characterized in that the synchronization coupling element (63) as measured at a right angle to the closing direction (SR) is of a smaller maximum width (B63) than the maximum width (B64) as measured at a right angle to the closing direction (SR) of a carrier body (64) of the transmission element (60).
4. The drive device as set forth in one of claims 1 through 3, characterized in that the locking pin (51) in the locking position (VS) is locked in the latching recess (R) of the guide track (52), wherein the latching recess (R) is at least partially formed by a locking element (53) moveable relative to the carrier (3) and wherein the locking pin (51) is held in the locking position (VS) to the locking element (53).
5. The drive device as set forth in claim 4, characterized in that the locking element (53) is arranged at the transmission element (60).
6. The drive device as set forth in one of claims 1 through 5, characterized in that the synchronization coupling element (63) has a plurality of teeth (67) spaced from each other in the closing direction (SR).
7. The drive device as set forth in one of claims 1 through 6, characterized in that the synchronization device (6) has a synchronization coupling counterpart element (66) which is rotatably mounted to the carrier (3) and which is preferably in the form of a toothed wheel and which can be coupled to the synchronization coupling element (63) in motion-transmitting relationship.
8. An arrangement (7) comprising - a drive device (1) as set forth in one of claims 1 through 7, - a second drive device (1') as set forth in one of claims 1 through 7, and - a synchronization bar (65) for connecting the synchronization devices (6), in particular the synchronization coupling counterpart elements (66), of the two drive devices (1, 1').
9. An article of furniture (8) comprising a furniture carcass (9), at least one furniture part (2) moveable relative to the furniture carcass (9) and a drive device (1) as set forth in one of claims 1 through 7 or an arrangement (7) as set forth in claim 8.