EP3941313B1 - Drive device for a moveable furniture part - Google Patents

Description

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 also relates to an arrangement with two synchronized drive devices. In addition, the invention relates to a piece of furniture with such a drive device.

Furniture fittings which 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") on the movable furniture part located in the closed position, a locking ("latch") of the locking device is released, as a result of which the ejection device opens the movable furniture part.

An example of such a furniture fitting or such a drive device is from WO 2017/004638 A1 out. After being pushed over at the beginning of the opening movement, the locking pin moves a locking element which is formed on the partially sleeve-shaped synchronization coupling piece. This synchronizing coupler corresponds to the transmission element of the present invention. The disadvantage of this document is that the carrier is relatively wide, since the synchronizing teeth are located on the side next to the guideway.

The same applies to the EP 3 054 811 B1 . Herein the coupling element corresponds to the transmission element of the present invention. The synchronization teeth arranged on the coupling elements are located on the side next to the guide track.

Also from the DE 10 2016 113 043 A1 and the DE 10 2016 120 586 A1 emerge drive devices, which are relatively wide. The actuating element shown in the first-mentioned publication corresponds in part to the transmission element of the present invention. The web arranged on this adjusting element can be interpreted as a synchronization coupling element. The disadvantage of such a drive device is that it is relatively wide. On the one hand, the web arranged on the actuating element is wider than the remaining area of the actuating element. Above all, however, the energy accumulators are located on the side next to the guideway.

Another drive device is from the document DE 20 2015 001 186 U1 known.

The object of the present invention is therefore to create a drive device that is alternative to or improved on the prior art. In particular, the drive device should be as narrow as possible. In addition, the drive device should have a simple structure, require relatively little space and have few components.

This is solved by a drive device with the features of claim 1. Accordingly, the invention provides that the guide track has a maximum guide track width measured perpendicular to the closing direction, with the synchronization coupling element and the ejection force accumulator being arranged within this guide track width when viewed in the closing direction. This enables a relatively narrow construction, with the end points of the maximum width of the guideway each being arranged in a boundary plane, which is aligned at right angles to the maximum width of the guideway, with the boundary planes being arranged parallel to one another, with the synchronization coupling element and the ejection force accumulator being entirely located between these boundary planes are and wherein the guideway has a cardioid section.

This means that neither the synchronization coupling element nor the ejection force accumulator are wider than the maximum width of the guideway. In addition, viewed in the closing direction, they do not protrude beyond the maximum width of the guideway. In other words, the synchronizing coupling element and the ejection force accumulator lie within a plane spanned by the maximum width of the guide track and the closing direction. To put it another way, the end points of the maximum width of the guideway are each arranged in a boundary plane, which is aligned at right angles to the maximum width of the guideway. These two boundary planes are parallel to each other. The synchronizing clutch element and the ejection force accumulator are located entirely between these boundary planes. Other components of the drive device can be arranged outside of these boundary planes, at least in certain areas.

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

In the installed position, the synchronization coupling element itself can be arranged above, below or in front of the guide track. However, it is preferably provided that the synchronization coupling element is arranged behind the guide track on the carrier in the closing direction.

The ejection force accumulator can also be arranged in the installed position above, below or behind the guideway. However, it is preferably provided that the ejection force accumulator is arranged in front of the guide track in the closing direction

In order to enable a narrow configuration of the drive device, provision is preferably made for the transmission element to be arranged within the width of the guide track, as seen in the closing direction.

Provision is also preferably made for the synchronization coupling element to have a smaller maximum width, measured at right angles to the closing direction, than the maximum width of the transmission element, measured at right angles to the closing direction.

According to the invention, it is provided that the guide track has a heart-shaped section. For example, it can be provided that the locking pin is locked in the locking position in the latching trough of the guide track, the latching trough being formed at least partially by a locking element that can be moved relative to the carrier and the locking pin being held on the locking element in the locking position. Provision is particularly preferably made for the locking element to be arranged on the transmission element.

In principle, it is possible for the transmission element to be rotatably mounted on the carrier. With a narrow design of the drive device, however, it is advantageous if the transmission element can be moved linearly in the closing direction.

The synchronization coupling element can be designed in the form of a lever. However, it is preferably provided that the synchronization coupling element has a plurality of teeth spaced apart from one another in the closing direction.

Appropriately, it is provided that the synchronization device is a counter-synchronizing coupling element, preferably in the form of a gear wheel, which is rotatably mounted on the carrier has, which can be coupled in a movement-transmitting manner to the synchronization coupling element.

The drive device described up to this point does not have to be used for synchronization or for the transmission of movement to a second drive device. Rather, such a drive device can also only be installed individually (and on one side) in a piece of furniture. The drive device then also has the components for the synchronization (actually unnecessarily), 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.

However, protection is sought not only 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 with this. This arrangement preferably also has a synchronizing rod for connecting the synchronizing devices, in particular the counter-synchronizing coupling 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. Provision is preferably made for these two drive devices to be mounted on opposite sides of the furniture body or the movable furniture part.

The carriers of the drive devices can be fastened to the movable furniture part (or to a drawer rail of a drawer pull-out guide), in which case the ejection devices together with the movable furniture part are attached (Assigned to the furniture carcass) push drivers. However, it is preferably provided that the carriers of the drive devices are fastened to the furniture body (preferably each to a body rail of a drawer pull-out guide), with the ejection devices moving the movable furniture part relative to the furniture body in the opening direction via drivers (assigned to the movable furniture part).

Fig. 1

schematisch ein Möbel mit mehreren bewegbaren Möbelteilen in Form von Schubladen,

Fig. 2

perspektivisch eine Schublade mit Schubladenausziehführungen und einer Antriebsvorrichtung für ein bewegbares Möbelteil,

Fig. 3

eine Anordnung aus zwei synchronisierten Antriebsvorrichtungen,

Fig. 4

perspektivisch eine Explosionsdarstellung der Antriebsvorrichtung,

Fig. 5a-5c

diverse Ansichten der Antriebsvorrichtung in Offenstellung,

Fig. 6a-6b

diverse Ansichten der Antriebsvorrichtung beim Schließen,

Fig. 7a-7c

diverse Ansichten der Antriebsvorrichtung beim Anschlagen des Verriegelungszapfens am zweiten Übertragungsanschlag,

Fig. 8a-8c

diverse Ansichten der Antriebsvorrichtung beim Lösen des Verriegelungszapfens vom zweiten Übertragungsanschlag,

Fig. 9a-9c

diverse Ansichten der Antriebsvorrichtung in Schließstellung,

Fig. 10a-10c

diverse Ansichten der Antriebsvorrichtung in Verriegelungsstellung,

Fig. 11a-11c

diverse Ansichten der Antriebsvorrichtung in Überdrückstellung,

Fig. 12a-12c

diverse Ansichten der Antriebsvorrichtung beim Anschlagen des Verriegelungszapfens am ersten Übertragungsanschlag,

Fig. 13a-13c

diverse Ansichten der Antriebsvorrichtung beim Lösen des Verriegelungszapfens vom ersten Übertragungsanschlag,

Fig. 14a-14c

diverse Ansichten der Antriebsvorrichtung während der Ausstoßbewegung,

Fig. 15

eine Draufsicht auf einen Teil der Antriebsvorrichtung bei im Freilaufkanal befindlichem Verriegelungszapfen und

Fig. 16a-16c

diverse Ansichten der Antriebsvorrichtung in Offenstellung.

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 illustrated in the drawings. Show in it:

1

schematically a piece of furniture with several movable furniture parts in the form of drawers,

2

in perspective a drawer with drawer pull-out guides and a drive device for a movable furniture part,

3

an arrangement of two synchronized drive devices,

4

perspective an exploded view of the drive device,

Figures 5a-5c

various views of the drive device in the open position,

Figures 6a-6b

various views of the drive mechanism when closing,

Figures 7a-7c

various views of the drive device when the locking pin hits the second transmission stop,

Figures 8a-8c

various views of the drive device when releasing the locking pin from the second transfer stop,

Figures 9a-9c

various views of the drive device in the closed position,

Figures 10a-10c

various views of the drive device in the locked position,

Figures 11a-11c

various views of the drive mechanism in the overpressure position,

Figures 12a-12c

various views of the drive device when the locking pin hits the first transmission stop,

Figures 13a-13c

various views of the drive device when releasing the locking pin from the first transmission stop,

Figures 14a-14c

various views of the drive mechanism during the ejection movement,

15

a top view of part of the drive device with the locking pin located in the freewheel channel and

Figures 16a-16c

Various views of the drive device in the open position.

In 1 a piece of furniture 8 with a furniture body 9 and a total of four movable furniture parts 2 is shown in very general terms. Each furniture part 2 consists of at least one drawer unit 10 and a front panel 11. The movable furniture parts 2 are attached to the furniture body 9 via a drawer pull-out guide 12, consisting of a drawer rail 13 and a body rail 14 (and possibly a middle rail, not shown).

A drive device 1 is shown schematically in 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 representation according to 1 corresponds to the carrier 3 of the drawer rail 13). The drive device 1 has an ejection device 4, the ejection carriage 41 and the ejection force accumulator 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 (heart-shaped in this case). Arranged on the body rail 14 (or on the furniture body 9 itself) is a driver 15 with which the ejection device 4 is at least partially engaged. However, the arrangement can also be reversed: that is, the drive device 1 is assigned to the carcass rail 14 , while 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 FIG Guide track 52 (see in detail below). In this case, the ejection force accumulator 42 is tensioned by a relative movement between the ejection carriage 41 and the carrier 3 .

In the closed position (third drawer from the top), the ejection force accumulator 42 is fully tensioned. This closed position SS can be reached 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 shown only schematically and is integrated into the pull-out guide 12.

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

In 2 a movable furniture part 2 in the form of a drawer with a sliding container 10 and a front panel 11 is shown in perspective. In addition, a drawer pull-out guide 12 with a drawer rail 13 and a cabinet rail 14 is shown, with a drawer pull-out guide 12 being provided on both sides of the movable furniture part 2 . Further shows 2 a drive device 1. The drive device 1 is attached to the body 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. This can (as shown) be assigned to the drawer pull-out guide 12 on the right-hand side, but also to the drawer pull-out guide 12 on the left-hand side.

In the case of wider or larger drawers, it is advantageous—above all to avoid skewing or jamming of the drawer in the furniture body 9—if drive devices 1 and 1′ that are synchronized with one another are provided on both sides of the movable furniture part. Suitable for this is in 3 an arrangement 7 of a (first) drive device 1 and a second drive device 1' is shown. These two drive devices 1 and 1' are connected to one another via a synchronizing rod 65. In concrete terms, sections of the opening movement and the closing movement of the drive devices 1 and 1' are synchronized with one another. The first drive device 1 is mirror-symmetrical to the second drive device 1'. Otherwise, the drive devices 1 and 1' are identical.

4 FIG. 14 is an exploded perspective view of a driving device 1. This driving device 1 has an elongate beam 3. FIG. This carrier 3 is detachably connected to the drawer 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 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 carriage 41 , the control lever 43 mounted movably (preferably rotatably) on the ejection carriage 41 and the ejection force accumulator 42 . The ejection carriage 41 is mounted on the carrier 3 in a linearly displaceable manner. An axis of rotation X ₄₅ is formed in the ejection carriage 41 . In or on this axis of rotation X ₄₅ the control lever 43 is rotatably mounted with its axis of rotation counterpart 45 . On the control lever 43 is the Locking pin 51 arranged or formed. The first energy storage base 46 is formed in the ejection carriage 41 . The second power storage base 47 is formed on the carrier 3 . The ejector energy store 42 in the form of a tension spring is fastened at one end to the first energy store base 46 and at the other end to the second energy store base ₄₇ . This driver catch lever 48 is rotatably mounted on the rotation axis counterpart 44 in the rotation axis X44. The driver catch lever 48 is guided via a guide element in the slideway 49 formed in the carrier 3 .

The drive device 1 also has a synchronization device 6 . This synchronizing device 6 includes on the one hand a transmission element 60 that can be moved linearly on the carrier. The synchronization coupling element 63 has teeth 67 spaced apart from one another in the closing direction SR. On the other hand, the synchronizing device 6 also comprises a counter-synchronizing coupling element 66 . The mating synchronizing clutch element 66 has a gear wheel 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 synchronization coupling counter-element 66.

Out of 4 also shows that the synchronization coupling element 63, measured perpendicularly 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 perpendicularly to the closing direction SR.

Out of 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 track width B _max is also again in the Figures 5a and 5c drawn. Seen in the closing direction SR, the synchronizing coupling element 63 and the ejection force accumulator 42 are arranged within this guideway width B _max , as is shown in FIG Figure 5a is indicated by the dashed line. As a result, the drive device 1 is relatively narrow.

Figure 5a shows a plan view of the assembled drive device 1. The ejection force store 42 is held on the two force store bases 46 and 47. The driver 15 is trapped between the driver catch lever 48 and the ejection carriage 41 . In the left pane of Figure 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 guideway 52 in the closing direction SR, while the ejection force accumulator 42 is located in front of the guideway 52 in the closing direction SR. The locking pin 51 guided in the guide track 52 is located in Figure 5a at the very end (on the right) of the guide track 52 in a bearing section L. This position of the drive device 1 according to FIG Figure 5a corresponds to a completely open position OS of the movable furniture part 2.

Matching is in detail according to Figure 5b recognizable that the locking pin 51 formed on the control lever 43 is located in the bearing section L.

Figure 5c shows a plan view of part of the drive device 1 according to FIG Figure 5a , where the right area and the ejection carriage 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 can be moved during a closing movement of the movable furniture part 2. This is followed by the latching section E, in which the locking pin 51 after leaving the closing section C is movable. This is followed by the overpressing section U. This is in turn followed by the opening section O, in which the locking pin 51 can be moved when the movable furniture part 2 is opened or ejected. This opening section O finally merges into the bearing section L or the closing section C again. In the left pane of Figure 5c a tooth 68 of the mating synchronization coupling element 66 can also be seen in addition to the rear side of the synchronization coupling element 63 .

In Figure 6a If the movable furniture part 2 has moved in the closing direction SR, it 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 takes the ejection carriage 41 with it. As a result, the ejection carriage 41 moves relative to the carrier 3 and the ejection force accumulator 42 is tensioned.

In detail according to Figure 6b it can be seen that the locking pin 51 is no longer in the bearing section L but in the closing section C of the guide track 52 .

According to Figure 7a the movable furniture part 2 and with it the ejection carriage 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 energy accumulator 42 was stretched even further.

In detail according to Figure 7b the locking pin 51 has moved so far in the closing section C that the locking pin 51 strikes the second transfer 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 stop position A.

In Figure 7c again the drive device 1 with hidden ejection carriage 41 can be seen.

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

Due to the fact that the locking pin 51 rests against the second transmission stop 62 in the stop position A, the transmission element 60 is in the closing movement (from Figure 7a on Figure 8a ) can be moved by the locking pin 51 via this second transmission stop 62 . 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 Figure 8b ), in which the second transmission stop 62 no longer protrudes into the guide track 52 and the locking pin 51 detaches from the second transmission stop 62. As a result of this movement of the second transmission stop 62 into the evasive position W, a further movement of the locking pin 51 into the latching section E is released.

In Figure 8c it can be seen that (exclusively) by the movement of the transmission element 60 triggered during the closing movement of the locking pin 51 via the second transmission stop 62, the locking element 53 (embodied on the transmission element 60) can be moved into a latching depression-forming position in which the locking element 53 forms the latching depression R of the guideway 52 forms. Simultaneously with this movement of the transmission element 60, the synchronization coupling element 63 is also moved, which in turn triggers a rotational movement of the synchronization coupling counter-element 66. This rotational movement is transmitted via the synchronizing rod 66 to a second drive device 1'. Thus, this last movement section of the closing movement in the closing section C is synchronized.

According to Figure 9a the movable furniture part 2 has been moved even further in the closing direction SR, as a result of which the closed position SS is reached. The ejection force accumulator 42 is fully charged.

As in the Figures 9b and 9c As can be seen, the locking pin 51 has even moved into the anti-press-through channel D of the guide track 52 . During this (push-through) movement, the transmission element 60 stands still. This means that there is no synchronization or transmission of movement to the second drive device 1'.

If in this position according to the Figures 10a to 10c If the user stops pressing on the movable furniture part 2, the ejection force accumulator 42 can relax slightly and thereby move the ejection carriage 41 slightly in the opening direction OR, so that the locking pin 51 moves along the latching section E until the locking pin 51 is in the latching recess R locked. Characterized the locking position VS of the locking device 5 is given, as in the Figures 5a, 5b and 5c is shown. The locking depression R is formed by the last area of the locking section E and by the holding surface H of the locking element 53 . The transmission element 60 also stands still during this movement of the locking pin 51 in the latching section E. This means that there is no synchronization or transmission of movement to the second drive device 1'.

The Figures 11a, 11b and 11c show the overpressing movement. When the SS is in the closed position according to the Figures 10a to 10c located movable furniture part 2 is pressed in the closing direction SR, the movable furniture part 2 reaches the overpressure position ÜS. This pushing-over movement of the movable furniture part 2 is transmitted from the driver 15 to the ejection carriage 41 of the ejection device 4 and to the control lever 43 connected to the ejection carriage, so that the control lever 43 formed on the control lever 43 moves Locking pin 51 is released from the locking trough R, is deflected by the deflection bevel 54 and enters the overpressure section U (including overpressure channel) of the guide track 52. As a result of this deflection, 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 overpressure movement.

If in this overpressure position ÜS according to Figures 11a to 11c the user stops pressing on the movable furniture part 2, the ejection force accumulator 42 can relax since the locking pin 51 is no longer locked. As a result of this relaxation, the ejection carriage 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 Figure 12b the locking pin 51 hits this end face S. In Figure 12c the locking pin 51 has already moved the locking element 53 slightly via 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 is aligned transversely to the holding face H. The transmission element 60 can be moved by this first transmission stop 61, which protrudes into the opening section O of the guide track 52, during the opening movement of the locking pin 51. Thus, a synchronization or movement transmission of this opening movement to the second drive device 1′ takes place. If, for whatever reason, the second drive device 1' has still not been unlocked despite the fact that the movable furniture part 2 has been pushed over, this synchronization moves the locking element 53 of the second drive device 1' in the opening direction OR, so that this locking element 53 presses the detent recess R no longer forms and the locking pin 51 of the second drive device 1' is unlocked.

In the Figures 13a, 13b and 13c the ejection force accumulator 42 has relaxed a bit 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 through 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 completed.

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

If starting from this position according to the Figures 14a to 14c - in which the ejection movement by the ejection device 4 actually takes place - is mistakenly pressed onto the movable furniture part 2 in the closing direction SR, the locking pin 51 cannot get back into the overpressing section U or into the detent recess R due to the design of the opening section O. For this reason, the guideway 52 has the 15 Freewheel channel F shown on. In these, the locking pin 51 can move non-destructively in the event of an erroneous closing movement that is too early.

In the Figures 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 returns to the position according to FIG Figures 5a to 5c . If in this position a user pulls further on the movable furniture part 2 in the opening direction OR, then the driver catch lever 48 is rotated counterclockwise about the axis of rotation X ₄₄ due to the curved design of the link track 49 . As a result, the driver 15 is no longer caught between the ejection carriage 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 .

Reference list:

1

(first) drive device

1'

second drive device

2

moveable piece of furniture

3

carrier

4

ejection device

41

ejection slide

42

ejection force accumulator

43

control lever

44

rotary axis counterpart

45

rotary axis counterpart

46

first power storage base

47

second power storage 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 transfer stop

62

second transfer stop

63

synchronization coupling element

64

carrier body

65

sync bar

66

Synchronization dome mating elements

67

Teeth

68

Teeth

69

Recording

7

arrangement

8th

Furniture

9

furniture body

10

push tank

11

front panel

12

drawer slide

13

loading rail

14

cabinet rail

15

driver

16

retraction device

ss

closed position

OS

open position

ÜS

override position

vs

locked position

R

rest recess

H

holding surface

O

opening section

S

face

C

closing section

A

stop position

W

dodge position

E

latching section

u

overpress section

L

storage section

D

push-through protection channel

f

freewheel channel

SR

closing direction

OR

opening direction

B max

maximum guideway width

B63

maximum width of the synchronization dome element

B64

maximum width of the carrier body

X44

axis of rotation

X45

axis of rotation

Claims (11)

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 (US) 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 (B_max) 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 (B_max), wherein the end points of the maximum guide track width (B_max) are respectively arranged in a limit plane oriented at a right angle to the maximum guide track width (B_max), 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 guide track (52) has a cardioid-shaped portion.
2. The drive device as set forth in claim 1, characterized in that the synchronization coupling element (63) is arranged in the closing direction (SR) behind the guide track (52) on the carrier (3).
3. The drive device as set forth in claim 1 or claim 2, characterized in that the ejection force storage means (42) is arranged in front of the guide track (52) in the closing direction (SR).
4. The drive device as set forth in one of claims 1 through 3, 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).
5. The drive device as set forth in one of claims 1 through 4, 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).
6. The drive device as set forth in claim 5, characterized in that the locking element (53) is arranged at the transmission element (60).
7. The drive device as set forth in one of claims 1 through 6, characterized in that the transmission element (60) is moveable linearly in the closing direction (SR).
8. The drive device as set forth in one of claims 1 through 7, characterized in that the synchronization coupling element (63) has a plurality of teeth (67) spaced from each other in the closing direction (SR).
9. The drive device as set forth in one of claims 1 through 8, 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.
10. An arrangement (7) comprising

    - a drive device (1) as set forth in one of claims 1 through 9,

    - a second drive device (1') as set forth in one of claims 1 through 9, 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').
11. 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 9 or an arrangement (7) as set forth in claim 10.

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