Furniture Drive Device

Abstract

A furniture drive (4) for movably supporting a furniture part (3) relative to a furniture cabinet (2), comprising at least one base (9) for fastening to and / or within the furniture cabinet (2), at least one adjustable arm (5) for fastening to the movable furniture part (3), and at least one locking device (38) for locking the at least one adjustable arm (5) to the at least one base (9), wherein the at least one adjustable arm (5) is locked to the at least one base (9) in a locking position, and wherein the at least one adjustable arm (5) is locked to the at least one base (9) in a locking position, and wherein the at least one adjustable arm (5) is locked to the at least one base (9). a locking device (38) having at least one locking element (38c) movable between a locking position and a removal position in which the locking device (38) is removable from another base body (9), and at least one operating device (11) operable, preferably with a tool (10), for moving the at least one locking element (38c) starting from the locked position to the removal position, the furniture drive (4) having at least one releasable safety device (19) preventing movement of the at least one locking element (38c) starting from the locked position to the removal position upon operation of the operating device (11).

Description

[Technical field]

[0001] The present invention relates to a furniture drive device for movably supporting a furniture part relative to a furniture cabinet, the device comprising: - at least one base for fastening to and / or within a furniture cabinet; - at least one adjustable arm for fastening to a movable furniture part; at least one locking device for locking the at least one adjustment arm to the at least one base, the at least one locking device comprising at least one locking element movable between a locked position, in which the at least one adjustment arm is locked to the at least one base, and a detached position, in which the at least one adjustment arm is detachable from the at least one base; - at least one actuating device, preferably operable with a tool, with which the at least one locking element can be moved starting from a locking position into a removal position; The present invention relates to a furniture driving device comprising:

[0002] Furthermore, the invention relates to a piece of furniture comprising a furniture cabinet, a furniture part supported so as to be movable relative to the furniture cabinet, and at least one furniture drive device in the form described below.

[0003] A furniture drive with a base and an adjustment arm that can be releasably fastened to the base is disclosed, for example, in WO 2006 / 053352. The separate construction of the base and the adjustment arm has the particular advantage that the construction dimensions of the furniture drive are divided into two assemblies, and different types of bases and different types of adjustment arms can be combined with one another.

[0004] A drawback of the known construction is that, when releasing the lock between the base and the adjusting arm, there is also the risk that the user may be surprised by the suddenly free weight of the furniture part connected to the adjusting arm and may no longer be able to hold the adjusting arm to which the furniture part is fixed, which may lead to the furniture part falling and being damaged, injuries to the installer and damage to the property.

[0005] SUMMARY OF THE DISCLOSURE The object of the present invention is to improve the furniture drive of the type mentioned at the beginning in such a way that the above-mentioned disadvantages are avoided and in particular safety for the user is increased.

[0006] This problem is solved by the features of claim 1. Further advantageous embodiments of the invention are set forth in the dependent claims.

[0007] According to the invention it is specified that the furniture drive has at least one releasable safety device which prevents movement of the at least one locking element starting from the locked position to the release position upon operation of the operating device.

[0008] In other words, even if the operating device is operated for the movement of the locking element to the removal position, for example with a tool, a releasable safety device is provided which prevents the unlocking from being released, i.e. at least one further action by the user is required for successful decoupling between the base body and the adjustment arm.

[0009] This further action can for example be an additional relative movement, in particular an upward movement, of the adjustment arm relative to the basic body, such that only the additional relative movement of the adjustment arm (preferably in the opening direction) performed by the user allows the movement of the locking element into the removal position.

[0010] According to one embodiment, it may be specified that the releasable safety device comprises at least one abutment contour, which can be abutted against the at least one locking element under the effect of gravity on the at least one adjusting arm, possibly by the weight of a furniture part which can be fixed to the at least one adjusting arm.

[0011] According to a possible embodiment, - at least one stop contour is disengageable from at least one locking element by movement of at least one adjusting arm against gravity, and / or - at least one stop contour comprises at least one recess in which at least one locking element can be at least partially positioned, and / or - at least one adjustment arm has a first end at which the movable furniture part can be fixed and a second end at which at least one abutment contour is arranged It may be specified that:

[0012] Further details and advantages of the invention will be explained on the basis of an embodiment shown in the drawing. [Brief description of the drawings]

[0013] [Figure 1a] FIG. 1 shows a piece of furniture with one movable furniture part and two furniture drives for moving the movable furniture part. [Figure 1b] FIG. 2 shows the furniture with the furniture parts removed. [Figure 2a] FIG. 2 shows the furniture drive device with the base and the adjustable arm separated from each other. [Figure 2b] FIG. 2 is another view of the furniture drive device with the base and the adjustable arm disconnected from each other. [Figure 3a] FIG. 13 shows the first step of attaching the adjustment arm to the base. [Figure 3b] 13A-13C show a subsequent step of attaching the adjustment arm to the base. [Figure 4a]FIG. 13 shows a further step of attaching the adjustment arm to the base. [Figure 4b] FIG. 13 shows a further step of attaching the adjustment arm to the base. [Figure 4c] FIG. 13 shows a further step of attaching the adjustment arm to the base. [Figure 5a] FIG. 2 shows a furniture drive with a force adjusting device for adjusting the force on the adjustment arm and an additional operating device for releasing the lock between the base and the adjustment arm. [Figure 5b] FIG. 2 shows another diagram of a furniture drive with a force adjusting device for adjusting the force on the adjustment arm and an additional operating device for releasing the lock between the base and the adjustment arm. [Figure 6a] FIG. 2 is a side view of the furniture drive with the locking element prevented from moving to the removal position by the releasable safety device; [Figure 6b] FIG. 2 shows an enlarged detailed view of part of the furniture drive with the locking element prevented from moving to the removal position by the releasable safety device; [Figure 7a] FIG. 2 is a side view of the furniture drive with the locking element released from movement to the removal position by the releasable safety device; [Figure 7b] FIG. 2 shows an enlarged detailed view of part of the furniture drive with the releasable safety device releasing the movement of the locking element to the removal position; [Figure 8a] FIG. 2 shows a side view of the furniture drive with the movement of the locking element prevented into the removal position by a slightly modified safety device. [Figure 8b] FIG. 2 shows an enlarged detail view of part of the furniture drive in a state in which the movement of the locking element into the detachment position is prevented by a slightly modified safety device. [Figure 9a] FIG. 8b shows a side view of the furniture drive with the movement of the locking element released to the removal position by the slightly modified safety device shown in FIG. 8a. [Figure 9b]FIG. 8c shows an enlarged detail view of part of the furniture drive in a state where the movement of the locking element to the removal position has been released by a slightly modified safety device shown in FIG. 8b.

[0014] In figure 1a a piece of furniture 1 is shown which comprises a furniture cabinet 2 and a movably supported furniture part 3 in the form of a furniture flap 3a which is liftable relative to the furniture cabinet 2. The movable furniture part 3 may be formed in one piece or alternatively the furniture may comprise two or more movable furniture parts 3.

[0015] On opposite side walls of the furniture cabinet 2, a furniture drive 4 is respectively fastened for moving the movable furniture part 3. The furniture drives 4 each have at least one pivotally supported adjusting arm 5, the pivoting movements of both adjusting arms 5 being mutually synchronizable by means of a pivotable synchronizing shaft 6.

[0016] In figure 1b the furniture 1 shown in figure 1a is shown with the furniture part 3 removed. Both furniture drives 4 can be formed with the same structure, so that the description given here is valid for both furniture drives 4 respectively.

[0017] The furniture drive 4 has a preferably substantially rectangular parallelepiped base body 9 which can be fixed to the furniture cabinet 2, on which the lever 5a of the adjustment arm 5 is supported so as to be pivotable about a pivot axis 7a.

[0018] In contrast, the synchronous shaft 6 is supported so as to be rotatable about another pivot axis 7c, the pivot axis 7a of the lever 5a and the other pivot axis 7c of the synchronous shaft 6 being laterally offset from one another and preferably spaced apart parallel to one another.

[0019] The offset arrangement between the pivot axis 7a of the lever 5a and the further pivot axis 7c of the synchronization shaft 6 has the particular advantage that the synchronization shaft 6 can be arranged at a higher point of the furniture cabinet 2, i.e. near the top 2a of the furniture cabinet 2, and thus increased storage space within the furniture cabinet 2 can be utilized.

[0020] Furthermore, it may be specified that, when the furniture driving device 4 is attached, the other rotating shaft 7c can be positioned further back in the depth direction of the furniture cabinet 2 than when the rotating shaft 7a and the other rotating shaft 7c are arranged coaxially.

[0021] The adjustment arm 5 may have a hardware part 8 that is releasably connectable to a hardware body (not shown) that can be fixed to the furniture part 3. The hardware part 8 may be pivotally connected to the lever 5a of the adjustment arm 5 and may be formed such that the hardware part 8 can be connected without tools to a hardware body that can be fixed to the furniture part 3.

[0022] FIG. 2a shows a furniture drive 4 for moving a movable furniture part 3, in which the adjustment arm 5 and the base 9 are decoupled from each other.

[0023] The base 9 of the furniture drive 4 has two housing walls 9a, 9b spaced apart parallel to one another, both housing walls 9a, 9b each having a flatly formed contact surface for contacting the furniture cabinet 2. The base 9 of the furniture drive 4 can thus be mounted on a first side wall of the furniture cabinet 2 or alternatively on a second side wall of the furniture cabinet 2 which is located opposite the first side wall.

[0024] Between the two housing walls 9a, 9b of the furniture drive 4 an end opening 9c is formed, through which the adjusting arm 5 passes at least partially in the maximum open position.

[0025] The adjustment arm 5 is supported by the base 9 so as to be rotatable about at least one rotation shaft 7a in the attached state.

[0026] In the embodiment shown, the adjustment arm 5 has a number of levers 5a, 5b, 5c which are pivotally connected to one another, at least two of these levers 5a, 5b of the adjustment arm 5 being detachably connected to the base 9 of the furniture drive 4.

[0027] The adjustment arm 5 is movable between a closed position and a maximum open position, in which the adjustment arm 5 is at least partially arranged inside a base 9 of the furniture drive 4 .

[0028] The levers 5a, 5b, 5c of the adjustment arm 5 may form a four-support geometry, one of the four supports of which corresponds to at least one first pivot axis 7a of the adjustment arm 5.

[0029] In the illustrated embodiment, the adjustment arm 5 is supported on the base 9 so as to be rotatable about at least one second rotation axis 7b, the base body 9 of the furniture drive 4 has an end opening 9c through which the adjusting arm 5 at least partially passes, at least in the maximum open position, and the second pivot axis 7b has a smaller normal distance to the end opening 9c than the first pivot axis 7a, and / or - the base 9 of the furniture drive 4 has an upper surface 34 which faces the top plate 2a (Figures 1a, 1b) of the furniture cabinet 2 when the furniture drive 4 is fixed to the furniture cabinet 2, and the second pivot axis 7b has a smaller normal distance from the upper surface 34 than the second pivot axis 7b.

[0030] According to one embodiment, it may be specified that the second pivot axis 7b corresponds to one of the four-point geometries of the levers 5a, 5b, 5c of the adjustment arm 5.

[0031] moreover, at least two of the levers 5a, 5b of the adjusting arm 5 are arranged one inside the other in at least one pivot position of the adjusting arm 5, preferably in each pivot position, so that the two levers 5a, 5b are formed substantially without a gap from the side in a plan view, and / or at least one of the levers 5a, 5c is U-shaped in cross section and the other lever 5b can be or is arranged at least partially between the vertical webs of the U-shape; It may be specified that:

[0032] The third lever 5c is provided with a fixed connection point 35, via which the movable furniture part 3 can be fixed, preferably releasably, to the adjustment arm 5, and the first lever 5a and the second lever 5b are pivotally connected to the third lever 5c. The third lever 5c is constructed bent, with the two sections 36a, 36b of the bent third lever 5c being substantially at an angle of 90° relative to one another.

[0033] In FIG. 2b the furniture drive 4 is shown in another perspective view, in which the housing wall 9a has been omitted.

[0034] The furniture drive 4 preferably has at least one force accumulator 12, preferably with at least one spring element 12a, which is preferably supported on the base body 9, and via which force can be applied to the adjusting arm 5. In this way, the weight of a furniture front 3, which can be fastened to the adjusting arm 5, can be compensated for.

[0035] The energy accumulator 12 is only diagrammatically shown in Fig. 2b and can comprise, in addition to mechanical spring elements (especially helical springs), for example, gas pressure springs. Instead of or in addition to the energy accumulator 12, an electric drive for driving the adjusting arm 5 can also be provided.

[0036] According to one embodiment, a transmission mechanism 17 is provided that can transmit the force that can be stored in the at least one force accumulator 12 to the adjustment arm 5, preferably the transmission mechanism 17 is - at least one intermediate lever 13 pivotable about a pivot axis 13a, preferably at least one energy accumulator 12 being connected to the at least one intermediate lever 13, preferably via an adjustable application point 14; and / or - at least one pressure piece 15, preferably a pivotable pressure roller, and at least one adjustment contour 16 on which the at least one pressure piece 15 can be movably supported during the movement of the adjustment arm 5, preferably the at least one pressure piece 15 being arranged or can be arranged on the at least one intermediate lever 13 of the transmission mechanism 17 and the at least one adjustment contour 16 being arranged or can be arranged on the adjustment arm 5, or vice versa; It may be specified that:

[0037] The adjusting arm 5 can be detachably coupled to the base body 9 of the furniture drive 4 via two locking devices 37, 38 which are separate from one another in the embodiment shown. At least one of the two locking devices 37, 38 has at least one fastening part 37a, 38a which can be hooked or pressed into the base body 9 and / or at least one locking element 37b which is loaded by a spring 25 (Figure 5a).

[0038] A first, preferably hook-shaped, fixing part 37a of the lever 5b can be hooked onto a pin arranged on the base body 9, e.g. on the second pivot axis 7b, and the lever 5b can be releasably locked by means of a spring-loaded locking element 37b.

[0039] In contrast, the second fixed part 38a of the other locking device 38 is releasably lockable by a movable adjustment part 22 which is preferably pivotable about the first pivot axis 7a. It is preferably specified that the adjustment contour 16 is formed on the movable adjustment part 22.

[0040] FIG. 3a shows a first step of mounting the adjustment arm 5 to the base body 9, in which the fixed part 37a of the locking device 37 of the adjustment arm 5 is hooked onto a pin arranged on the second pivot axis 7b.

[0041] As can be seen, the locking element 37b is supported for linear movement, for example along at least one guide, and is preloaded in the direction of the locking position by a spring 25. The spring 25 can be formed, for example, by a mechanical spring element or by the material elasticity of the part. As can be seen, the locking element 37b has a slope, by means of which the locking element 37b can be pushed aside against the force of the spring 25 when cooperating with the pivot shaft 7b.

[0042] Fig. 3b shows the locking element 37b locked to the pivot axis 7b. Starting from Fig. 3a, the locking element 37b is moved by its ramp against the force of the spring 25 and is then brought into the locked position with the pivot axis 7b by the force of the relaxed spring 25. The lever 5b is now pivotally connected to the pivot axis 7b.

[0043] 4a to 4c show further steps of the mounting of the adjustment arm 5 on the basic body 9. Starting from the position shown in FIG. 3b, the levers 5a, 5b are pivoted relative to the basic body 9 about the pivot axis 7b (FIG. 4a). The fixed part 38a of the locking device 38 can be supported on a guide element 39 arranged on the adjustment part 22, and the laterally projecting locking element 38b of the lever 5a can be introduced into the recess 27a of the adjustment part 22.

[0044] As can be seen in FIG. 4b, the movable locking element 38c is moved along the guide 30 by the fixed part 38a of the lever 5a against the force of the spring 25 (not shown here).

[0045] As can be seen in FIG. 4c, the locking element 38c can enter into the locking recess of the fixed part 38a by virtue of the contour formed by the fixed part 38a and the force of the stored spring 25, so that the lever 5a can be releasably locked to the base body 9.

[0046] FIG. 5 a shows a furniture drive 4 in a perspective view, with the adjusting arm 5 being connected to a base 9 of the furniture drive 4 via at least one locking device 38 .

[0047] The at least one locking device 38 has a locking element 38c that is movable between a locked position in which the at least one adjustment arm 5 is locked to the at least one base 9 and a detached position in which the at least one adjustment arm 5 is detachable from the at least one base 9.

[0048] The furniture drive 4 has a force adjusting device 18 capable of adjusting the force of the force accumulator 12 on the at least one adjustment arm 5, preferably comprising: - has at least one pivotally supported adjusting wheel 18a, the force of the force accumulator 12 acting on the at least one adjusting arm 5 being adjustable by pivoting the adjusting wheel 18a, and / or - has at least one threaded spindle 18b (FIGS. 3a, 3b), along which the application point 14 of the force accumulator 12 is movable when the force adjustment device 18 is operated; and / or the base body 9 has an end face with at least one end opening 9c (FIG. 2a), through which at least one adjusting arm 5 passes in the open position, and an adjusting wheel 18a of the force adjusting device 18 is operable through the end opening 9c laterally to the end face.

[0049] As FIG. 5b shows, the furniture drive 4 further has at least one operating device 11, preferably operable with a tool 10, by means of which the at least one locking element 38c is movable from a locked position to a release position, in which the adjusting arm 5 is removable from the base 9.

[0050] The operating device 11 may have an opening 11a for introducing the tool 10, and the locking element 38c is movable against the spring action into a removal position by applying a force to the locking element 38c.

[0051] The user therefore has two different possibilities for introducing the tool 10: on the one hand, he can operate the rotatable adjusting wheel 18a of the force adjustment device 18, and on the other hand, he can release the lock between the adjusting arm 5 and the base 9 by operating the operating device 11. If the user mistakenly operates the operating device 11 instead of the force adjustment device 18, the lock between the base 9 and the adjusting arm 5 can also be released unintentionally, with the result that the adjusting arm 5 falls together with the movable furniture part 3.

[0052] Figure 6a shows the furniture drive 4 in a side view in which a user attempts to operate the locking element 38c of the locking device 38 against the force of the spring 25 (Figure 6b) by introducing a tool 10 into the opening 11a of the operating device 11 (Figures 5a, 5b).

[0053] In figure 6b the area of ​​the locking element 38c shown in figure 6a is shown in an enlarged manner. As can be seen, the fixed part 38a of the adjusting arm 5 is accommodated between a stationary guide element 39 (preferably in the form of a cylindrical pin) and a movable guide element 38c of the locking device 38.

[0054] In addition to the locking device 38, the furniture drive 4 has a releasable safety device 19 which, upon actuation of the operating device 11, prevents movement of the at least one locking element 38c starting from the locked position into the removal position.

[0055] The releasable safety device 19 may have at least one abutment contour 19a which can be abutted against at least one locking element 38c under the effect of gravity on the at least one adjusting arm 5, possibly by the weight of a furniture part 3 which can be fixed to the at least one adjusting arm 5.

[0056] According to one embodiment, at least one stop contour 19a is disengageable from at least one locking element 38c by a movement of at least one adjusting arm 5 against gravity, and / or at least one stop contour 19a is provided with at least one recess 19c in which at least one locking element 38c can be at least partially positioned, and / or at least one adjustment arm 5 has a first end to which the movable furniture part 3 can be fixed and a second end at which at least one abutment contour 19a is arranged It may be specified that:

[0057] In the illustrated embodiment, the guide 30 thus forms, together with the fixed part 38a of the adjustment arm 5, a common abutment contour 19a for the locking element 38c in order to movably support the latter.

[0058] That is, if an attempt is made to push the locking element 38c out of the locked position by applying a force with the tool 10, the movement of the locking element 38c in the direction of the removal position is prevented, i.e. the locking element 38c is locked between the recess 19c and the fixed part 38a of the adjustment arm 5 and cannot be moved further along the guide 30 to the removal position, that is, the lock between the base body 9 and the adjustment arm 5 continues to be maintained despite the operation of the operating device 11 by the releasable safety device 19.

[0059] In figure 7a the furniture drive 4 is shown in a side view. To release the lock, it is first necessary to move the adjusting arm 5 in the opening direction OR (i.e. in the direction of the illustrated arrow).

[0060] 7b shows an enlarged view of the area of ​​the locking element 38c shown in FIG. 7a. By the movement of the adjusting arm 5 in the opening direction OR, the fixed part 38a of the adjusting arm 5 is pivoted counterclockwise about the guide element 39, whereby the locking element 38c is released from the recess 19c of the stop contour 19a. This then allows the movement of the locking element 38c along the guide 30 to the removal position, whereby the adjusting arm 5 can be removed from the base body 9 of the furniture drive 4.

[0061] According to a possible embodiment, the guide 30 comprises: - at least partially formed as a slot; and / or - arranged on the base body 9, preferably on a pivotable adjustment part 22 of the base body 9; and / or - has at least one recess 19c in which at least one locking element 38c can be at least partially positioned It may be specified that:

[0062] In another embodiment, the operating device 11 is - at least one adjusting arm 5 is operable in an open position, and / or - located on the end face of the furniture drive 4 facing the user in the mounting position of the furniture drive 4, and / or - has at least one opening 11a for introducing a tool 10, and at least one locking element 38c is operable with the tool 10 introduced through the opening 11a It may be specified that:

[0063] In another embodiment, at least one locking device 38 has at least one fastening part 38a arranged on the adjustment arm 5, which fastening part 38a can be hooked and / or pressed into the base 9 of the furniture drive 4, and / or at least one locking device 38 has at least one fixed part 38a arranged on the adjustment arm 5, which fixed part 38a is received in the locked position of the adjustment arm 5 between a locking element 38c and a guide element 39 of the furniture drive 4, and / or the at least one locking device 38 has at least one spring 25 capable of biasing the at least one locking element 38c towards the locked position, and / or - at least one locking element 38c of at least one locking device 38 is preferably formed as a cylindrical pin It may be specified that:

[0064] In FIG. 8a a slightly modified embodiment of a furniture drive 4 with a safety device 19 is shown in a side view.

[0065] Figure 8b shows the region of the locking element 38c shown in figure 8a, where the recess 19c for partially accommodating the locking element 38c is not arranged in the guide 30 as in the previous embodiment, but in the adjusting arm 5. However, the functional form of the safety device 19 remains essentially the same.

[0066] In the locked state of the adjustment arm 5, the locking element 38c is accommodated between the fixed part 38a of the adjustment arm 5 and the guide 30. At this time, the locking element 38c is locked between the recess 19c of the fixed part 38a and the guide 30, so that the movement of the locking element 38c to the removal position is prevented.

[0067] Figure 9a shows an embodiment of the furniture drive 4 shown in Figures 8a and 8b, in which the lock between the base 9 and the adjusting arm 5 can only be released by additionally raising the adjusting arm 5 in the opening direction OR.

[0068] In figure 9b the area of ​​the locking element 38c shown in figure 9a is shown. Lifting of the adjusting arm 5 in the opening direction OR causes the fixed part 38a to be pivoted in the counterclockwise direction about a guide element 39, preferably in the form of a cylindrical pin.

[0069] Pivoting of the fixed part 38a about the axis formed by the guide element 39 frees a path for the locking element 38c to the removal position along the guide 30. The locking element 38c can now be moved to the removal position against the force of the spring 25 by applying a force with the tool 10, whereby the adjustment arm 5 can be removed from the base 9.

[0070] It is therefore only when the movable furniture part 3 is first moved further in the opening direction OR in the opened state and then the operating device 11 is operated for unlocking that it is possible to remove the adjusting arm 5 from the base body 9. This represents a very large safety measure, since it is absolutely necessary for the user to hold the adjusting arm 5 and / or the furniture part 3 connected to the adjusting arm 5, thereby preventing the movable furniture part 3 from falling.

Claims

1. A furniture drive (4) for movably supporting a furniture part (3) relative to a furniture cabinet (2), at least one base (9) for fixing to and / or within said furniture cabinet (2), at least one adjustable arm (5) for fastening to said movable furniture part (3); at least one locking device (38) for locking said at least one adjustment arm (5) to said at least one base body (9), said at least one locking device (38) comprising at least one locking element (38c) movable between a locking position in which said at least one adjustment arm (5) is locked to said at least one base body (9) and a detachment position in which said at least one adjustment arm (5) is detachable from said at least one base body (9); at least one operating device (11) capable of moving said at least one locking element (38c) starting from said locking position into said removal position; A furniture drive device (4) comprising: The furniture drive (4) has at least one releasable safety device (19) which prevents movement of the at least one locking element (38c) starting from the locked position to the removed position upon operation of the operating device (11). A furniture drive device (4).

2. A furniture driving device (4) as described in claim 1, wherein the operating device (11) can be operated using a tool (10).

3. 3. The furniture drive (4) according to claim 1 or 2, wherein the releasable safety device (19) comprises at least one abutment contour (19a), which abuts against the at least one locking element (38c) under the effect of gravity on the at least one adjusting arm (5).

4. A furniture drive device (4) as described in claim 3, wherein the abutment contour portion (19a) can be abutted against the at least one locking element (38c) by the weight of the furniture part (3) which can be fixed to the at least one adjusting arm (5) under the effect of gravity on the at least one adjusting arm (5).

5. said at least one stop contour (19a) is disengageable from said at least one locking element (38c) by a movement of said at least one adjusting arm (5) against said force of gravity, and / or said at least one stop contour (19a) comprises at least one recess (19c) in which said at least one locking element (38c) can be at least partially positioned, and / or said at least one adjustment arm (5) has a first end to which said movable furniture part (3) can be fixed and a second end at which said at least one abutment contour (19a) is arranged; 5. Furniture drive (4) according to claim 4, characterised in that it is

6. The furniture drive (4) according to any one of claims 1 to 5, characterized in that the at least one locking element (38c) is movable in and / or along a guide (30) between the locking position and the release position.

7. The guide (30) is at least partially formed as slots, and / or - disposed on said substrate (9), and / or - comprises at least one recess (19c) in which said at least one locking element (38c) can be at least partially positioned; 7. Furniture drive (4) according to claim 6, characterised in that

8. A furniture drive device (4) as described in claim 6, characterized in that the guide (30) is arranged in a rotatable adjustment part (22) of the base (9).

9. The operating device (11) is - operable in an open position of said at least one adjustment arm (5), and / or - arranged on the end face of the furniture drive (4) facing the user at the mounting position of the furniture drive (4), and / or - has at least one opening (11a) for introducing a tool (10), said at least one locking element (38c) being operable with said tool (10) introduced through said opening (11a); 9. Furniture drive (4) according to any one of the preceding claims, characterized in that it comprises a drive mechanism for furniture.

10. the at least one locking device (38) has at least one fixed part (38a) arranged on the adjustment arm (5), the fixed part (38a) being hookable and / or pushable into the base (9) of the furniture drive (4); and / or - said at least one locking device (38) has at least one fixed part (38a) arranged on said adjustment arm (5), said fixed part (38a) being received in the locked position of said adjustment arm (5) between said at least one locking element (38c) and a guide element (39) of said furniture drive (4); and / or said at least one locking device (38) comprises at least one spring (25) capable of urging said at least one locking element (38c) towards said locked position, and / or - said at least one locking element (38c) of said at least one locking device (38) is formed as a pin; 10. Furniture drive (4) according to any one of the preceding claims, characterized in that it comprises a

11. A furniture drive device (4) as described in any one of claims 1 to 9, characterized in that at least one locking element (38c) of at least one locking device (38) is formed as a cylindrical pin.

12. 12. The furniture drive (4) according to claim 1, characterized in that at least two separate locking devices (37, 38) are provided for releasable locking between the at least one base (9) and the at least one adjusting arm (5).

13. A furniture drive device (4) as described in claim 12, wherein the at least one adjustment arm (5) is rotatable about at least two mutually separate pivot axes (7a, 7b) on the at least one base (9).

14. 14. The furniture drive (4) according to claim 1, characterized in that the furniture drive (4) has at least one force accumulator (12) via which a force can be applied to the at least one adjustment arm (5) in order to compensate for the weight of the furniture part (3) which can be fixed to the adjustment arm (5).

15. A furniture drive device (4) as described in claim 14, wherein the energy accumulator (12) comprises at least one coil spring and / or is supported on the base (9).

16. The furniture drive device (4) according to claim 14 or 15, characterized in that a transmission mechanism (17) is provided that can transmit the force that can be stored in the at least one force accumulator (12) to the adjustment arm (5).

17. The transmission mechanism (17) - equipped with at least one intermediate lever (13), and / or - at least one pressure piece (15) and at least one adjustment contour (16) capable of movably supporting said at least one pressure piece (15) during the movement of said adjustment arm (5), Furniture drive (4) according to claim 16.

18. The transmission mechanism (17) - at least one intermediate lever (13), said at least one energy accumulator (12) being connected to said at least one intermediate lever (13) via an adjustable point of application (14), and / or - at least one pressure piece (15) in the form of a rotatable pressure roller and at least one adjustment contour (16) capable of movably supporting said at least one pressure piece (15) during the movement of said adjustment arm (5), said at least one pressure piece (15) being arranged or capable of being arranged on at least one intermediate lever (13) of said transmission mechanism (17) and said at least one adjustment contour (16) being arranged or capable of being arranged on said adjustment arm (5) or vice versa; Furniture drive (4) according to claim 16.

19. The furniture drive (4) according to any one of claims 14 to 18, characterized in that the furniture drive (4) has a force adjusting device (18) capable of adjusting the force of the force accumulator (12) on the at least one adjustment arm (5).

20. The force adjustment device (18) - has at least one pivotally supported adjusting wheel (18a), the force of the force accumulator (12) acting on the at least one adjusting arm (5) being adjustable by pivoting the adjusting wheel (18a), and / or - has at least one threaded spindle (18b) along which the point of application (14) of the force accumulator (12) is movable upon actuation of the force adjustment device (18), and / or the base body (9) has an end face with at least one end face opening (9c) through which the at least one adjustment arm (5) passes in the open position, and an adjustment wheel (18a) of the force adjustment device (18) is operable through the end face opening (9c) laterally relative to the end face; 20. Furniture drive device (4) according to claim 19.

21. The adjustment arm (5) - has at least one fastening part (37a, 38a) which can be hooked or pushed into said base body (9), and / or - comprising at least two or more levers (5a, 5b, 5c) pivotally connected to one another, and / or - equipped with at least one bent lever (5c) and / or - has at least one lever (5c), on which a fixed connection point (35) is formed, via which the movable furniture part (3) can be fixed to the adjustable arm (5); 21. Furniture drive (4) according to one of the preceding claims, characterized in that it is

22. The adjustment arm (5) - has at least two fastening parts (37a, 38a) which can be hooked or pushed into said base body (9), and / or - at least one bent lever (5c) whose two parts (36a, 36b) are at an angle of substantially 90° relative to one another, and / or - has at least one lever (5c), on which a fixed connection point (35) is formed, via which the movable furniture part (3) can be releasably fixed to the adjustment arm (5); 21. Furniture drive (4) according to one of the preceding claims, characterized in that it is

23. The furniture drive device (4) according to any one of claims 1 to 22, characterized in that the adjustment arm (5) is movable between a closed position and a maximum open position, and in the closed position the adjustment arm (5) is at least partially arranged inside the base (9) of the furniture drive device (4).

24. The furniture drive (4) according to any one of claims 1 to 23, characterized in that the furniture drive (4) has at least one movable adjustment part (22), and one lever (5a, 5b, 5c) of the adjustment arm (5) can be releasably coupled to the at least one adjustment part (22).

25. A furniture drive device (4) as described in claim 24, wherein the adjustment part (22) is rotatable around a pivot axis (7a).

26. A piece of furniture (1) comprising a furniture cabinet (2), a furniture part (3) supported so as to be movable relative to the furniture cabinet (2), and at least one furniture drive device (4) according to any one of claims 1 to 25, wherein the base (9) of the at least one furniture drive device (4) is fixed to the furniture cabinet (2), and the movably supported furniture part (3) is fixed to the adjustment arm (5) of the at least one furniture drive device (4).

27. ​​Furniture (1) as described in claim 26, wherein the base (9) of the at least one furniture drive device (4) is fixed within and / or to a side wall of the furniture cabinet (2) and the movably supported furniture part (3) is fixed to the adjusting arm (5) of the at least one furniture drive device (4) via a fixed connection point (35).

Images