EP2429339A1 - Ejection device for movable furniture part - Google Patents

Abstract

The invention relates to an arrangement for locking and ejecting a movable furniture part (5), comprising two unlockable ejection devices (1, 2) arranged on both sides of a furniture body (3) or on the movable furniture part (5), and spring-loaded ejectors (13), wherein the unlockable ejection devices (1, 2) comprise a catch element (18) mounted on a linearly displaceable carriage (17), the catch element (18) engaging into a slotted guide path (10) having the shape of a heart curve and by which the movable furniture part can be held in a closed latching position (E) via a locking element (4). According to the invention, this latching position (E) can be released by overpressing the movable furniture part (5) towards the interior, wherein the linearly displaceable carriages (17) of the two unlockable ejector devices (1, 2) are motionally coupled via a rotatable synchronization rod.

Description

 Ejection device for movable furniture part

The invention relates to an arrangement for locking and ejecting a movable furniture part with two arranged on both sides of a furniture body or on the movable furniture part, unlockable ejection devices and spring-loaded ejectors, wherein the unlockable ejection devices have a mounted on a linearly movable carriage latching element, wherein the latching element in a heart-curved Sliding link engages over which the movable furniture part with one or a arranged on the carriage locking element in a closed detent position is durable, said detent position is solved by overpressing the movable furniture part inwardly. Furthermore, the invention relates to an unlockable ejection device for such an arrangement.

In the field of furniture fitting house devices have long been known that can lock movable furniture parts, especially drawers, via a so-called touch-latch mechanism. The furniture fittings are designed so that when the drawer is closed by additional impressions (overpressure) of the drawer takes place an unlocking of the drawer, causing them by a loaded during the closing movement memory (usually a spring) is ejected.

When such a single fitting is inserted on one side of a relatively wide drawer, the touch-trigger mechanism override point may vary depending on the distance from the drawer to the drawer. This often creates an unwanted slanted position of the movable furniture part.

For this purpose, for example, a solution is already proposed in EP 1 785 063 A1, wherein a torsion bar is provided which allows a direct movement of a pivotable locking element from one drawer side to the other drawer side. A similar embodiment is known from EP 1 887 172 A2. The AT 502 937 A1 also relates to an adjusting device arranged on both sides of a furniture for moving movable furniture parts (a flap), wherein the two adjusting devices for the synchronous movement of the same are coupled to each other in motion by a synchronization rod. A disadvantage of these designs is that these furniture fittings require a lot of space, since they are located behind the drawer, so that the drawer can not fully extend to the end of the furniture body. Furthermore, given the separate execution of the locking and ejection device increased space requirements, whereby only the locking elements motion coupled directly via the synchronization rod. The actual ejector is arranged in the region of the pull-out guide in EP 1 785 063 A1 (see reference numeral 23), whereby this ejection movement can not be synchronized via the torsion bar. This can also lead to misalignments of the entire movable furniture part when ejecting, because although the unlocking is done by the direct transmission of movement with the torsion bar substantially simultaneously, but the ejection forces on both sides can run differently and independently (slightly delayed unlocking, different ejection force in Energy storage, skew the drawer already on triggering), resulting in an uneven ejection on the two sides and the drawer is skewed during ejection or begins to crooked and in the worst case, even in the furniture body can wedge.

A particular disadvantage of the prior art is that due to the only one-sided existing heart curve of the triggering path is very long, especially if the drawer is to be opened on the diagonally opposite side by over-pressing. First of all, the overpressure along the drawer must be at the end of the drawer

Conducted contact element. From there, the torsion bar is set in rotary motion, with a wide drawer rather a twist can take place. Only then the movement is forwarded to the locking element with the heart curve, after which the unlocking takes place after overpressures and after the movement return both

Locking elements are unlocked and the drawer can be ejected.

Furthermore, it is known from the prior art to arrange two unlockable ejection devices, which are not synchronized, whereby a tilting of the drawer only one-sided locking occur especially in wide drawers and a

Problem can lead. For example, AT 503 497 A1 has an apparatus for

Locking and ejecting movable furniture parts with spring-loaded ejectors

(Springs, ejection element) and a latching element (locking element) to the object, which engages in a heart cam-shaped slide track on a housing and by pressing inwards (after the touch-latch principle) is solvable. The order includes a collection device. A movement coupling via a rotatable synchronization rod is not provided.

The object of the present invention is therefore to provide an improved, compared to the prior art, unlockable ejection device and an arrangement with two synchronizable ejection devices. In particular, should

Pitching of drawers in the locked position can be prevented. In addition, a secure and possibly simultaneous unlocking and triggering the

Drawer opening movement can be ensured, no matter in which area is pressed on the movable furniture part.

This is achieved by virtue of the fact that the linearly displaceable carriages of the two releasable ejection devices are coupled to one another via a rotatable synchronization rod. As a result, a conversion of the linear movement of the carriage is achieved in a rotational movement of the synchronization rod. The double-sided heart curve also ensures that impressions are registered and forwarded from every position of the drawer front in a uniform manner, thus ensuring optimum triggering. Thus, no skewing when triggering and also when closing or when bringing into the detent position to be feared.

According to a preferred embodiment it can be provided that the carriage is in communication with the synchronization rod via a transmission for the motion conversion of the linear movement of the carriage into a rotational movement of the synchronization rod. Particularly preferably, this can be achieved in that the gear output device side comprises a displaceably mounted element and synchoni- tion rod side a rotary member for power transmission, wherein the displaceably mounted element is coupled to the carriage motion. As a result, a direct power transmission is achieved by the latching element on the displaceably mounted element.

According to a preferred further embodiment it can be provided that the displaceably mounted element is a toothed rack and the rotary element is a toothed wheel. Alternatively, the transmission could for example be designed in the form of a belt drive or a friction wheel. As a further alternative, a hinge mechanism could also perform the motion transformation. Furthermore, it can be preferably provided that the preferably pivotable locking element is mounted on the carriage, which holds in the locked position of the latching element, the movable furniture part via a holding element arranged thereon in the locked position in the closed end position. As a result, the actual locking of the drawer takes place in the region of the locking element, wherein this locking element engages over the guide carriage, the latching element and a heart cam pin arranged thereon in the heart-curved slide track and holds in the recess of the heart cam in the closed end position.

Preferably, it can further be provided that the movable furniture part on the holding elements arranged thereon by the ejector, which is part of the unlockable ejection devices, is obviously or ejected.

Furthermore, it can be provided that the movable guide carriage is acted upon by an elastic element, preferably a spring.

In order to achieve the synchronization of the ejector and the locking element in a single unlockable ejection device, according to a preferred embodiment of the invention, it may be provided that the locking element, the rack, the ejector and the latching element are coupled in movement with the guide carriage.

In order to achieve a direct flow of force and thus the most ideal synchronization of the ejection movement and the unlocking movement, it can be provided that the guide carriage, the ejector and the rack are integrally formed.

The unlocking of the locking element can be ensured by its pivotability, wherein it can be particularly preferably provided that both the locking element and the latching element are pivotally mounted on a guide or pivot about a pivot point.

For the handy and safe attachment of a single unlockable ejection device can be provided that the guide carriage is arranged linearly movable in a housing, wherein preferably the rack, the ejector and the Locking element protrude through the housing openings from the housing, whereby they can be brought on the one hand with the rotary member or the gear and on the other hand with the holding element of the drawer in movement-forwarding contact.

5. It is preferably further provided that in the housing a heart-shaped cam track is formed, in which engages the arranged on the latching heart cam. In addition, in the housing may be formed a control cam slide track, in which engages a arranged on the locking element cam. 0

For easy and safe installation on the furniture body floor or on the movable furniture part (in which case the holding element is arranged on the furniture body) may preferably be provided that the housing can be attached to a mounting plate. The simplest and most effective way of mounting the subject unlockable ejector or assembly of two unlockable ejectors and a synchronizer bar is accomplished when the first and second unlockable ejectors attach to the spaced sides of a furniture furniture body via the mounting plates without tools are and can be brought by a subsequently usable synchronization bar in combination.

When charging and discharging the spring force of the ejector may preferably be provided that the spring force of the guide carriage acting spring in5 ejection direction of the movable furniture part acts and charges during the closing movement of the movable furniture part, wherein during the opening movement in the ejection direction of the ejector by the movement coupling with the spring-loaded carriage ejects the holding element of the movable furniture part linearly. According to a further preferred embodiment it can be provided that the synchronization rod has the preferably torsion-proof toothed wheels at both ends, the toothed wheels respectively meshing with the toothed rack of the first and the second ejection device. 5 To ensure the security against rotation, it can be provided that the gears are connected by splines to the synchronization rod against rotation. For easy installation of the synchronization rod between the possibly already mounted unlockable ejection devices may preferably be provided that in the synchronization rod at least one elastic element, preferably a spring is arranged, which acts on at least one of the gears in the longitudinal direction of the synchronization rod. Alternatively, it can also be provided that two elastic elements are arranged in the synchronization rod, which act on the rotationally arranged at the ends of the synchronization rod gears (9a) in the longitudinal direction of the synchronization rod.

Protection is also desired for a single unlockable ejection device, which in particular has a movable carriage, which is coupled in motion with a transmission part, and can be brought into a force or motion-transmitting connection with a rotary element of a synchronization rod.

In other words, such an arrangement may be referred to as a furniture fitting set comprising two unlockable ejection devices according to the invention and a synchronization rod connecting them. Furthermore, protection is sought after for a piece of furniture with an unlockable ejection device.

Further details and advantages of the present invention will be explained in more detail below with reference to the description of the figures with reference to the exemplary embodiments illustrated in the drawings. It shows or show

1 is a perspective view of a piece of furniture,

2 is a perspective view of a piece of furniture with open drawer,

3 is a perspective view of a furniture fitting set, FIG. 4 is a perspective view of an unlockable ejection device,

5 is a perspective view of an unlockable ejection device without housing,

6 is a side view of the unlockable ejector of FIG. 5,

7 shows an exploded view of the unlockable ejection device and the synchronization rod, Fig. 8 to 11 plan views of two unlockable ejectors together

Synchronization rod during the closing process,

Fig. 12 is a plan view of an exploded view of the unlockable

Ejector

Hg. 13 is a bottom view of an explosively illustrated unlockable

Ejector

14 shows the housing from below,

Hg. 15 parts of the heart-shaped slide track and the

Steering cam track in the housing FFiigg.1166 the unlockable ejector including synchronization rod and

pull-out,

17 is a rear view of one half of a drawer with an unlockable ejection device,

18 is a side view of another embodiment of an unlockable ejection device,

19 is a detail view of the marked with A section of FIG. 18,

Fig. 20 is a perspective view of another embodiment of a

Spline of the unlockable ejector, and

Fig. 21 is a side view of another embodiment of a retaining bushing for an unlockable ejection device.

Fig. 1 shows in perspective the furniture 24, wherein in the furniture body 3, three relatively wide movable furniture parts 5 are arranged. In FIG. 2, a movable furniture part 5 is extended or opened out of the furniture body 3 of the furniture 24, whereby the view of the pull-out guide 25 and the unlockable ejection device 1 arranged on the furniture body floor 3a is released. In the left-hand area, an unlockable ejection device 2, which is embodied substantially mirror-symmetrically with respect to the releasable ejection device 1, can not be seen from this perspective. This is already apparent, for example, from FIG. 3, wherein the two unlockable ejection devices 1 and 2 are connected via a synchronization rod 6. The housing 19 of the unlockable ejection devices 1 and 2 is in this case mounted on mounting plates 23, which in turn can be mounted on the furniture carcass base 3a or on the movable furniture part 5. In the left area is shown how the ejector 13, a holding element 12 (which is connected to a movable furniture part 5, not shown) contacted. In Fig. 4 fasteners 27 of the mounting plate 23 are shown. The part of the synchronization rod 6, which is no longer shown in FIG. 4, is arranged in a force-transmitting connection via a splined shaft 28 of a slip-on element 26 and further via a splined shaft 29 which can be inserted therein. The synchronization rod can, for example, be cylindrical with a circular or oval cross-section and made, for example, from metal or plastic.

Fig. 5 shows in more detail how the gear 7 is formed by the gear 9a, the rack 8a and the holding bushing 31 for rotatably supporting the gear 9a. Furthermore, the interior of the housing 19 of the unlockable ejection device 1 is shown, wherein in the housing 19 of the guide carriage 17 in translation in the longitudinal direction of the elastic elements 16 (springs) is movable. With the guide carriage 17 are the

Pusher 13 and the rack 8a made in one piece. Furthermore, the locking element 4 and the latching element 18 are arranged pivotably on the guide carriage 17. The locking element 4 is pivotally mounted at the pivot point T and via the control cam 22 in the not shown here

Control cam track 21 pivotally guided at translational movement of the guide carriage 17. In a comparable manner, this applies to the latching element 18, which is connected to the guide carriage 17 at the pivot point X and via the

Heart cam 11 is pivotally guided in the heart cam-shaped slide track 10, not shown here, on the underside of the housing 19.

FIG. 6 shows a side view of the unlockable ejection device 1 together with the synchronization rod 6 from FIG. 5. The synchronization rod 6 has wedge-shaped indentations and cuts in the inner region into which the splined shaft 28 of the slip-on element 26 engages against rotation.

Fig. 7 shows the housing 19 together with a part of the housing opening 20, whereby the rack 8a protrudes and can be brought into contact with the gear 9a. Furthermore, it can be seen that the guide carriage 17, the rack 8a and the ejector 13 are made in one piece. In the latching element 18 of the heart cam 11 is used. The locking element 4 is made in one piece with the control cam 22 and can be clipped on the pivot pin 36. In addition, the holding element 12 is shown, which is mounted on the movable furniture part 5, not shown, and can be brought into contact with the ejector 13 or with the locking element 4 is. The elastic elements 16 act on the guide carriage 17 and are at least partially disposed between the guide carriage 17 and the mounting plate 23. The housing 19 can be fastened to the mounting plate 23 via the attachment regions 32. In the area of the housing opening 20, the retaining bushing 31 together with a rotary bearing 30 for the gear 9a can be fastened, the gear 9a being guided via the rotary hub 35 in the rotary bearing 30. The gear 9a is on the splined part 29 together with spring-holding projection 37 in the insertion extension 26 secured against rotation, with an elastic element 15 is arranged in the form of a spring therebetween. As a result, a change in length of the entire synchronization rod 6 is given and it especially facilitates the attachment of the synchronization rod 6 between not always arranged at the same distance unlockable ejection devices 1 and 2. In addition, need by this design of the plug-in extension 26 with elastic element 15 and splines 29 including gear 9a the commercially available metal cylindrical rods are roughly cut to length, since the fine adjustment and applicability of the entire synchronization rod 6 between the ejection devices 1 and 2 is given via the elastic member 15.

Fig. 8 shows a plan view of the two unlockable ejection devices 1 and 2, which are connected via a synchronization rod 6. This shows the position of the latching element 18, the guide carriage 17 together with the ejector 13 and the rack 8a and the locking element 4 with the movable furniture part 5 open. Of this movable furniture part 5, only the holding elements 12 are shown, with these move in the closing direction SR.

In FIG. 9, these holding elements 12 have moved so far in the closing direction SR that they contact the ejector 13 on the ejector stop.

By a further movement of the movable furniture part 5 in the closing direction SR, the entire guide carriage 17 is moved over the ejector 13 and the holding element 12 in the closing direction until the movable furniture part 5 has reached the closed end position E (FIG. 10). During this closing movement SR, the elastic elements 16 extend, as a result of which an energy store is charged. In this closed end position E, the heart cam 11 is held in the indented region 33 of the heart-shaped slide track 10 shown in FIG. 15. Now, when this heart cam 11 is moved from the closed end position E further in the closing direction SR (FIG. 11 and FIG. 15), the Herzkurvenvölbung 34 is reached and then overcome (overcoming point), whereby the Herzkurvenenzapfen 11 in a position P behind the closed End position E passes, whereupon the heart cam 11 via the latching element 18 and the guide carriage 17 no longer biases the elastic element 16 and this can discharge and moves the guide carriage 17 together with ejector 13 in the opening direction OR. In this case, the ejector 13, the holding member 12 and thus the drawer 5 in the opening direction OR with. During the opening movement OR, the locking member 4 pivots away due to the guided in the cam track 21 control cam 22 from the support member 12, whereby the drawer 5 is unlocked and the ejection process can be performed by the ejector 13, since the locking element 4 and the ejector 13 via the guide carriage 17 are coupled for movement.

Since all movements of the locking element 4, the ejector 13, the latching element 18 and the rack 8a with the guide carriage 17 in the translatory direction at least in the region of the pivot points X and T are motion-coupled, also carried a motion transmission means of the transmission 7 to the rotational movement of the synchronization rod. 6 and thereby to the respective other unlockable ejection device 1 and 2 respectively.

Fig. 12 shows a plan view of the essential parts of the releasable ejection device 1 and Fig. 13 is a corresponding view from below. In Fig. 13 it can be seen how the elastic elements 16 are arranged below or within the guide carriage 17 and are connected in the left-hand area with this form-fitting manner. Furthermore, on the underside of the housing 19, the heart-shaped slide track 10 and the cam track track 21 are shown, which is shown in more detail in Fig. 14.

In Fig. 15, the two control cams are only partially shown, wherein the heart cam 11 is shown schematically at the beginning of the closing movement SR. This heart cam 11 moves along the lower portion of the heart-shaped cam track 10 towards the closed end position E, in this end position E of the heart cam 11 holds in the indented area 33 and thus the entire drawer 5 is held. By overpressure of the drawer 5 is the Cardiac peg 11 is moved in the direction of position P behind the closed end position E, wherein after releasing the drawer 5 by the operator of the heart cam 11 along the upper portion of the heart-shaped cam track 10 is ejected by the counteracting elastic member 16 in the opening direction OR. Corresponding to the direction of movement of the heart cam 11, the movement of the control cam 22, which causes the pivoting movement of the locking element 4 due to the curve in the cam track track 21.

16 again shows the attachable to the furniture body ejector devices 1 and 2 together with synchronization bar 6, wherein additionally in the right-hand area a pull-out guide 25, which is fastened to the furniture cabinet side wall, represented. For example, the spring-loaded ejector could also be arranged therein and would not have to form part of the unlockable device per se. An automatic retraction mechanism could also be provided herein.

FIG. 17 shows a further embodiment of an ejection device 1 according to the invention for a movable furniture part 5 in a view from the rear, wherein only one half of the movable furniture part 5 and accordingly only one pull-out guide 25 and one ejection device 1 are shown. The movable furniture part 5 is movable with a pull-out guide 25 comprising a carcass rail 38 and a drawer rail 39. In this embodiment, a partial extract is shown, which has a lower installation height than a full extension. In order to prevent a collision between the rear wall of the furniture body 3 and the synchronization rod 6 or to avoid manual, subsequent work on the movable furniture part 5 or the furniture body 3, the synchronization rod 6 is not formed with a circular cross-section, but with an oval cross-section. Likewise, the spline 29 has oval cross-section. On the mounting plate 23, the ejection device 1 is arranged. On or in the housing 19, the gear not shown here with gear 9a and rack 8a is arranged. The toothed shaft 29, which is formed with an oval cross-section, is arranged on the toothed wheel 9a and engages in the synchronization rod 6, which likewise has an oval cross-section.

In Fig. 18 a side view of the unlockable ejection device 1 of the embodiment of Fig. 17 is shown, wherein the housing is partially hidden. As can be seen from this figure, but in particular also from FIG. 19, the A with Fig. 18 shows marked detail in a detail view, the synchronization rod 6, but also the associated spline 29, an oval cross-section, which has a total of a lower height, and thus is flatter than the round synchronization rod 6 of the above-mentioned embodiment.

Fig. 20 shows a perspective view of this embodiment of the invention, wherein the spline shaft 29, which is arranged on the gear 9, has an oval cross-section. The synchronization rod 6 also has an oval cross section.

In the side view of Fig. 21, a further embodiment of the retaining sleeve 31 is shown, which has a nose 35 'of the rotary shaft 35 corresponding recess so that the rotary shaft 35 and thus the synchronization rod 6 is stored correctly. The correct bearing means in this case that the flat portion of the oval cross-section of the synchronization rod 6 and the spline shaft 29 upwards, i. in the direction of the drawer bottom is arranged. In a synchronization rod 6 with a circular cross section, the bearing of the rotary shaft 35 in the retaining sleeve 31 is irrelevant.

By this invention thus a tool-free installation of all parts is possible. Furthermore, the drawer is fixed on both sides, but also ejected. There is no loss of space created behind the drawer because the synchronization shaft is positioned under the drawer. The drawer and the body need not be additionally processed. The signal and power transmission takes place from the synchronization shaft via the

Pinion of gear on the rack. The synchronization also prevents the panel from protruding on one side and the drawer can be securely closed.

In general, it should be noted that all the above-mentioned embodiments, which do not relate to the synchronization rod, are described both for one and for an arrangement with two, essentially mirror-symmetrical, unlockable ejection devices.

Claims

claims: 1. Arrangement for locking and ejecting a movable furniture part with two arranged on both sides of a furniture body or on the movable furniture part, unlockable ejection devices and spring-loaded ejectors, wherein the unlockable ejection devices have a latching element mounted on a linearly movable carriage, wherein the latching element engages in a cardan curved cam track , via which the movable furniture part via a locking element in a closed detent position is durable, said detent position by overpressing the movable furniture part is inwardly detachable, characterized in that the linearly movable carriage (17) of the two unlockable ejection devices (1, 2) via a rotatable synchronization rod (6) are motion coupled. 2. Arrangement according to claim 1, characterized in that the carriage (17) with the synchronization rod (6) via a transmission (7) for the motion conversion of the linear movement of the carriage (17) in a rotational movement of the synchronization rod (6) is in communication. 3. Arrangement according to claim 2, characterized in that the transmission (7) ejection device side a displaceably mounted element (8) and synchonisationsstangenseitig a rotary member (9) for transmitting power, wherein the displaceably mounted element (8) with the carriage (17) coupled in motion is. 4. Arrangement according to claim 2 or 3, characterized in that the displaceably mounted element (8) is a rack (8a) and the rotary member (9) is a gear (9a). 5. Arrangement according to one of claims 1 to 4, characterized in that on Carriage (17) which is mounted, preferably pivotable, locking element (4) which holds in the locked position of the latching element (18) the movable furniture part (5) via a retaining element (12) arranged thereon in the locked end position (E). 6. Arrangement according to one of claims 1 to 5, characterized in that the latching element (18) engages via a heart cam pin (11) arranged thereon in the heart-curved slide track (10). 7. Arrangement according to one of claims 5 or 6, characterized in that the movable furniture part (5) on the holding elements arranged thereon (12) by the ejector (13), the part of the unlockable ejection devices (1, 2), apparently or is ejectable. 8. Arrangement according to one of claims 1 to 7, characterized in that the movable guide carriage (17) with an elastic element (16), preferably a spring, is acted upon. 9. Arrangement according to one of claims 4 to 8, characterized in that the locking element (4), the rack (8 a), the ejector (13) and the Snap-in element (18) with the guide carriage (17) are coupled for movement. 10. Arrangement according to one of claims 4 to 9, characterized in that the guide carriage (17), the ejector (13) and the rack (8a) are integrally formed. 11. Arrangement according to one of claims 1 to 10, characterized in that the locking element (4) via a pivot point (T) and the latching element (18) via a pivot point (X) are pivotally mounted on the guide carriage (17). 12. Arrangement according to one of claims 1 to 11, characterized in that the guide carriage (17) in a housing (19) is arranged linearly movable. 13. Arrangement according to claim 12, characterized in that the rack (8a), the ejector (13) and the locking element (4) through housing openings (20) protrude from the housing. 14. Arrangement according to claim 12 or 13, characterized in that in the housing (19), the heart cam-shaped slide track (10) is formed, in which the on the latching element (18) arranged heart cam pin (11) engages. 15. Arrangement according to one of claims 12 to 14, characterized in that in the housing (19) has a cam-slide track (21) is formed, in which a on the locking element (4) arranged control cam pin (22) engages. 16. Arrangement according to one of claims 12 to 15, characterized in that the housing (19) on a mounting plate (23) is attachable. 17. Arrangement according to claim 16, characterized in that the first and second unlockable ejection device (1, 2) on the mounting plates (23) without tools on spaced sides or surfaces of a furniture body (3) of a piece of furniture (24) are attachable and by a subsequently usable synchronization rod (6) can be brought into connection. 18. Arrangement according to one of claims 8 to 15, characterized in that the spring force of the guide carriage (17) acted upon spring (16) in the ejection direction (OR) of the movable furniture part (5) and in the closing movement (SR) of the movable Furniture part (5) charges, wherein at the opening movement in the ejection direction (OR) of the ejector (13) through the Motion coupling with the spring-loaded carriage (17) the holding element (12) of the movable furniture part (5) linearly ejects. 19. Arrangement according to one of claims 4 to 18, characterized in that the synchronization rod (6) at both ends, preferably against rotation Gear wheels (9a), wherein the gears (9a) respectively mesh with the rack (8a) of the first and the second ejection device (1, 2). 20. The arrangement according to claim 19, characterized in that the toothed wheels (9a) via splines (14) with the synchronization rod (6) are connected against rotation. 21. Arrangement according to claim 19 or 20, characterized in that in the synchronization rod (6) at least one elastic element (15), preferably a spring, is arranged, the at least one of the gears (9 a) in Applied longitudinally of the synchronization rod (6). 22. Arrangement according to claim 19 or 20, characterized in that in the synchronization rod (6) two elastic elements (15) are arranged, which at the ends of the synchronization rod (6) against rotation arranged gears (9 a) in the longitudinal direction of the synchronization rod (6 ). 23. Arrangement according to one of claims 1 to 22, characterized in that the arrangement comprises an automatic feed device, which brings the movable furniture part (5) during closing movement (SR) in the closed end position (E). 24. Entriegelbare ejection device, in particular for an arrangement according to one of claims 1 to 23, for locking and ejecting a movable furniture part, wherein the unlockable ejection device comprises a spring-loaded ejector and mounted on a linearly movable carriage latching element, which engages in a heart-curved slide track, via which the movable furniture part is durable in a closed detent position, said detent position being releasable inwardly by overpressing the movable furniture part, characterized in that the movable carriage (17) is motion-coupled to a transmission part in the form of a displaceably mounted element (8), and with a rotary element (9) of a Synchronization rod (6) can be brought into a force-transmitting connection. 25. Entriegelbare ejection device according to claim 24, characterized in that the displaceably mounted element (8) as a rack (8 a) and with the rotary member (9) in the form of a gear (9 a) for force or Motion transmission via the synchronization rod (6) to a second unlockable ejection device (2) with the rack (8a) can be arranged combing. 26. Furniture with an arrangement according to one of claims 1 to 23. 27. Furniture with, in particular on both sides depending, an unlockable ejection device (1, 2) according to claim 24 or 25.