Drive device for a furniture fitting or building fitting

Abstract

The invention relates to a drive device (5), preferably an ejection device, for a furniture fitting (4) or a building fitting, comprising: - at least one housing (8), - at least one adjusting device (11) which can be moved relative to the housing (8), - at least one spring (12) for applying a force to the at least one adjusting device (11), wherein a first end of the at least one spring (12) is connected to the at least one adjusting device (11), and - at least one bearing device (13) via which a second end of the at least one spring (12) is mounted on the at least one housing (8). The at least one bearing device (13) can be adjusted relative to the at least one housing (8) over a limited distance.

Description

[0001] Drive device for a furniture fitting or building fitting

[0002] The present invention relates to a drive device, preferably an ejection device, for a furniture fitting or a building fitting, comprising:

[0003] - at least one housing,

[0004] - at least one adjusting device movable relative to the housing,

[0005] - at least one spring for applying force to the at least one adjusting device, wherein the at least one spring is connected with a first end to the at least one adjusting device,

[0006] - at least one bearing device, via which the at least one spring is mounted with a second end on the at least one housing.

[0007] Furthermore, the invention relates to a furniture fitting or a building fitting with a drive device of the type to be described.

[0008] Furthermore, the invention relates to a piece of furniture comprising a furniture body, a furniture part mounted so as to be movable relative to the furniture body and at least one drive device of the type to be described.

[0009] Such drive devices are used, for example, to retract a movably mounted piece of furniture into a closed end position relative to a furniture carcass using a spring force and / or to eject it from a closed end position relative to a furniture carcass into an open position. For furniture parts of different sizes or weights, it is desirable to set the force of the spring individually. Users find it unpleasant if the retraction forces and / or ejection forces acting on the movable furniture part are too high or too low. Higher spring forces are necessary for heavy movable furniture parts than for lighter furniture parts. If an additional damping device in the form of a retraction device is combined with the drive device, the retraction force of the spring must also be adjusted accordingly.The object of the present invention is to provide a drive device of the type mentioned at the outset while avoiding the above disadvantages.

[0010] This is achieved according to the invention by the features of claim 1. Further advantageous embodiments of the invention are specified in the dependent claims.

[0011] According to the invention, it is provided that the at least one bearing device is adjustable over a limited path relative to the at least one housing.

[0012] In other words, the position of the bearing device to which the spring is attached can be adjusted to different positions relative to the housing. This allows both the maximum spring force and the spring travel to be adjusted, allowing the spring force to be individually adapted to the furniture part being moved.

[0013] According to a preferred embodiment, it can be provided that the at least one bearing device is adjustable between a first position and at least one second position, wherein the at least one spring is more strongly tensioned in the second position than in the first position, and wherein at least one release device is provided with which the at least one bearing device can be reset from the second position into the first position, preferably under the action of the at least one spring.

[0014] Such a release device is advantageous because the position of the bearing device can be immediately reset to a starting position in which the spring is minimally tensioned by a user simply by actuating the release device. This eliminates the need for numerous rotations of a rotatably mounted actuating element to reduce the spring force.

[0015] According to one embodiment, the release device can have at least one, preferably linearly movable, release element which is directly accessible from a position outside the housing of the drive device for manual operation or for operation by means of a tool.

[0016] The at least one bearing device can be returned from the second position to the first position by manual actuation or by means of a tool, preferably under the action of the at least one spring.

[0017] Mechanical spring elements in the form of compression springs, tension springs or torsion springs can preferably be used as springs.

[0018] Further details and advantages of the present invention are explained with reference to the following description of the figures.

[0019] Fig. 1 shows a piece of furniture with a furniture body and with a furniture part mounted so as to be movable relative to the furniture body in a perspective view,

[0020] Fig. 2 shows a perspective view of a furniture fitting in the form of a drawer pull-out guide and with a drive device for driving the movable furniture part,

[0021] Fig. 3a, 3b show a first embodiment of a drive device in a perspective view and in a plan view,

[0022] Fig. 4a-4e show a time sequence for adjusting the spring force of the drive device according to Fig. 3a, 3b,

[0023] Fig. 5a, 5b show a second embodiment of a drive device in a perspective view and in a plan view,

[0024] Fig. 6a, 6b show a third embodiment of a drive device in a perspective view and in a plan view, Fig. 7a-7d show a time sequence for setting the

[0025] Spring force of the drive device according to Fig. 6a, 6b,

[0026] Fig . 8a , 8b show a fourth embodiment of a

[0027] Drive device in a perspective view and in a top view,

[0028] Fig . 9a- 9c show a time sequence for setting the

[0029] Spring force of the drive device according to Fig. 8a, 8b,

[0030] Fig. 10a-10c show the drive device according to Fig. 3a, 3b, 4a-4e in a slightly modified embodiment.

[0031] Fig. 1 shows a perspective view of a piece of furniture 1 with a furniture body 2 and a furniture part 3 that is movably mounted relative to the furniture body 2. In the exemplary embodiment shown, the movable furniture part 3 is movably mounted relative to the furniture body 2 via at least one furniture fitting 4 in the form of a drawer pull-out guide 4a. The movable furniture part 3 is designed here in the form of a drawer 3a, which has a front panel 3b, side walls 3c, a drawer bottom 3d and a rear wall 3e.

[0032] By means of a drive device 5, the movable furniture part 3 can be retracted into a closed end position relative to the furniture body 2 and / or ejected, at least in sections, from a closed end position relative to the furniture body 2 into an open position. The drive device 5 can be designed, for example, as a retraction device and / or as an ejection device.

[0033] In the case of a retraction device, it is preferably provided that the drive device 5 has a spring 12 ( Fig. 3a ) and a driver acted upon by the spring 12 and detachably coupled to the movable furniture part 3, wherein the movable furniture part 3 can be retracted into the closed end position by the driver and by a force of the spring 12. In the case of an ejection device, it is preferably provided that the drive device 5 has a spring 12 ( Fig. 3a ), a movable ejection element acted upon by the spring 12 and a locking device for locking the ejection element in a locking position. The ejection element can be unlocked by over-pressing the movable furniture part 3 into an over-pressing position located behind a closed position of the movable furniture part 3, wherein the movable furniture part 3 can be ejected in the opening direction by a force of the spring 12 when the ejection element is unlocked.

[0034] Fig. 2 shows a perspective view of a furniture fitting 4 in the form of a drawer pull-out guide 4a and with a drive device 5 for driving the movable furniture part 3.

[0035] The drawer pull-out guide 4a has a body rail 6, which is to be fastened to the furniture body 2 via at least one fastening section 6a. Furthermore, the drawer pull-out guide 4a has at least one pull-out rail 7, which is movable relative to the body rail 6 and is to be connected to the drawer 3a.

[0036] The drive device 5 for driving the movable furniture part 3 has a housing 8, which is connected or detachably connectable to the furniture fitting 4. Alternatively, the housing 8 of the drive device 5 can be integrated into the furniture fitting 4.

[0037] In the exemplary embodiment shown, the drive device 5 has a synchronization device 9, wherein a movement of the drive device 5 can be synchronized with a movement of a further drive device 5 located opposite on the furniture body 2 via a synchronization rod (not shown here).

[0038] By means of a rotatably mounted adjusting wheel 10, a closed end position of the pull-out rail 7 (and thus of the movable furniture part 3) can be adjusted relative to the furniture body 2. Fig. 3a shows a perspective view of a first

[0039] Embodiment of a drive device 5. The drive device 5 comprises:

[0040] - at least one housing 8 ,

[0041] - at least one adjusting device 11 movable relative to the housing 8,

[0042] - at least one spring 12 for applying force to the at least one adjusting device 11, wherein the at least one spring 12 is connected with a first end to the at least one adjusting device 11,

[0043] - at least one bearing device 13, via which the at least one spring 12 is mounted with a second end on the at least one housing 8.

[0044] The adjusting device 11 is coupled or detachably coupled to the movable furniture part 3, so that a movement of the adjusting device 11 can be transferred to the movable furniture part 3.

[0045] According to the invention, it is provided that the at least one bearing device 13 is adjustable over a limited travel relative to the at least one housing 8. In this way, the maximum spring force as well as the spring travel are adjustable, so that an individual adaptation of the spring force to the furniture part 3 to be moved is possible.

[0046] According to one embodiment, it can be provided that the at least one bearing device 13 is adjustable between a first position and at least one second position, wherein the at least one spring 12 is tensioned more strongly in the second position than in the first position, wherein a release device 14 is provided with which the at least one bearing device 13 can be reset from the second position into the first position, preferably under the action of the at least one spring 12.

[0047] According to possible embodiments, it can be provided that the at least one release device 14

[0048] - has at least one, preferably sawtooth-shaped, locking contour 15a, and / or - has at least one release position, in which the release device 14 releases the at least one bearing device 13, and at least one locking position, in which the release device 14 locks the at least one bearing device, wherein at least one spring element 16 is provided, which prestresses the release device 14 relative to the housing 8 into the locking position, and / or

[0049] - is mounted so as to be movable in a direction transverse to a longitudinal direction L of the at least one spring 12 relative to the housing 8, and / or

[0050] - has at least one release element 14a which is arranged outside the housing 8 and is designed for manual operation.

[0051] The release device 14 has the advantage that the at least one spring 12 can be reset to a minimum tension with immediate effect without numerous rotations of a rotatably mounted adjusting element being necessary.

[0052] According to possible embodiments, it can be provided that the at least one bearing device 13

[0053] - movable relative to the housing 8, preferably linearly displaceable, and / or

[0054] - is mounted so as to be movable in a direction parallel to a longitudinal direction L of the at least one spring 12, and / or

[0055] - can be guided relative to the housing 8 via at least one guide device 17, preferably wherein the at least one guide device 17 has at least one guide track 17a and at least one guide element 17b which can engage in the guide track 17a, and / or

[0056] - is substantially L-shaped or substantially U-shaped, and / or

[0057] - has at least one actuating element 18 which is arranged outside the housing 8 and is designed for manual operation.

[0058] In the illustrated embodiment, the guide track 17a is arranged or formed on the housing 8, and the guide element 17b is arranged or formed on the bearing device 13. Of course, in a kinematic reversal, it is also possible to arrange the guide track 17a on the bearing device 13 and the guide element 17b on the housing 8.

[0059] The at least one bearing device 13 can be releasably locked to the at least one housing 8 by a locking device 15. The locking device 15 can, for example, have at least one locking contour 15a and at least one locking element 15b (Fig. 3b) that can engage with the locking contour 15a.

[0060] The housing 8 has a fastening surface 29 for engagement with the furniture fitting 4 or for engagement with a furniture part, wherein the release element 14a of the release device 14 is mounted so as to be movable in a plane parallel to the fastening surface 29 of the housing 8. This has the particular advantage that the release element 14a of the release device 14 can be actuated laterally, whereby the drive device 5 can be constructed very flat.

[0061] The at least one bearing device 13 and the at least one release device 14 are designed as two structural units that are mounted on the housing 8 so as to be movable independently of one another.

[0062] The at least one spring 12 can be tensioned by the actuating element 18 of the bearing device 13. The spring 12 can be relaxed by the release element 14a of the release device 14, which is separate from the actuating element 18.

[0063] The actuating element 18 of the bearing device 13 is mounted so as to be movable in the longitudinal direction L of the at least one spring 12 and parallel to the fastening surface 29 of the housing 8.

[0064] The release element 14a of the release device 14 is mounted so as to be movable transversely to the longitudinal direction L of the at least one spring 12 and parallel to the fastening surface 29 of the housing 8.

[0065] Fig. 3b shows the drive device 5 according to Fig. 3a in a plan view, wherein the force of the spring 12 is set to a minimum. To adjust a position of the bearing device 13 relative to the housing 8, the actuating element 18 is pressed in in direction X, wherein the locking element 15b is movable against a force of the spring element 16, preferably a compression spring, along the preferably sawtooth-shaped locking contour 15b and along a guide track 19 arranged on the housing 8, preferably running linearly and / or parallel to the longitudinal direction L of the spring 12.

[0066] In this way, the locking element 15b can be releasably locked along the locking contour 15a at two or more predetermined positions, wherein two or more different forces of the spring 12 can be adjusted.

[0067] According to possible embodiments, it can be provided that

[0068] - the locking element 15b is arranged on the at least one bearing device 13, and / or

[0069] - the locking element 15b is substantially cylindrical, and / or

[0070] - at least one guide track 19 is provided on the housing 8, in which the locking element 15b can be guided.

[0071] According to possible embodiments, it can be provided that the locking contour 15a

[0072] - is movable relative to the housing 8, preferably linearly displaceable, and / or

[0073] - is movable relative to the housing 8 against a force of a spring element 16, and / or

[0074] - is movable in a direction transverse to a direction of movement of the bearing device 13, and / or

[0075] - is sawtooth-shaped, wavy or semicircular.

[0076] Fig. 4a-4e show a time sequence for adjusting the force of the spring 12 of the drive device 5 according to the embodiment of Figures 3a, 3b. Fig. 4a shows that the position of the bearing device 13 starting from the first locking position of the locking element 15b according to the previous Figures 3a, 3b, in which the tension of the spring

[0077] 12 was set to a minimum, can be adjusted by manually exerting pressure on the actuating element 18 in direction X relative to the housing 8.

[0078] To guide the bearing device 13, at least one guide element 17b is provided which is arranged on the bearing device 13 and which is movable, preferably linearly displaceable, along a guide track 17a arranged on the housing 8.

[0079] Furthermore, the locking element 15b arranged on the bearing device 13 can be guided along the, preferably sawtooth-shaped, locking contour 15a of the housing 8, wherein the locking element 15b is additionally guided along a, preferably linear, guide track 19 of the housing 8.

[0080] The guide element 17b and / or the locking element 15b can be substantially cylindrical.

[0081] Fig. 4b shows that the locking element 15b of the bearing device 13 is in a second locking position in which the tension of the spring 12 is increased compared to the first locking position of the locking element 15b according to Fig. 3a, 3b.

[0082] Fig. 4c shows that the locking element 15b of the bearing device

[0083] 13 can be guided further along the locking contour 15a of the housing 8 by continued pressure exerted on the actuating element 18.

[0084] Fig. 4d shows that the locking element 15b of the bearing device 13 is in a third locking position, in which the tension of the spring 12 is increased compared to the first locking position according to Fig. 3a, 3b and compared to the second locking position according to Fig. 4b. In the exemplary embodiment shown, three different locking positions of the locking element 15b are provided, which define three different tensions of the spring 12. Of course, if necessary, several locking positions of the locking element 15b can also be provided.

[0085] It is also possible to provide a continuously adjustable locking element 15b instead of predefined locking positions. However, the predefined locking positions have the advantage that the user receives assistance in selecting a suitable spring tension and thus enables rapid adjustment of the spring force.

[0086] Fig. 4e shows that the release element 14a of the release device 14 has been moved transversely to the longitudinal direction L of the spring 12 in the direction Y against the force of the spring element 16. In this way, the locking element 15b can be released from the locking contour 15a of the housing 8. The locking element 15b (together with the bearing device 13) can therefore be reset from the third locking position by the action of the spring 12 into a position in which the force of the spring 12 is set to a minimum (see Fig. 3a, 3b).

[0087] Fig. 5a shows a second embodiment of a drive device 5 with an adjusting device 20 for adjusting a position of the bearing device 13 relative to the housing 8.

[0088] According to possible embodiments, it can be provided that the adjusting device 20

[0089] - has at least one adjusting wheel 20a, 20b, wherein the adjusting wheel 20a, 20b is arranged on the housing 8 so as to be rotatable about an axis running transversely to the longitudinal direction L of the at least one spring 12 and / or has at least one circumferential actuating contour 21 which is arranged at least in sections outside the housing 8 and is designed for manual actuation, and / or has at least one spiral guide slot 22 which interacts with a plurality of projections 23 spaced apart from one another.

[0090] In the embodiment shown, the spiral guide slot 22 is arranged on at least one adjusting wheel 20a, 20b and the projections 23 cooperating with the guide slot 22 are arranged on the bearing device 13 which is movable relative to the housing 9.

[0091] Of course, the reverse arrangement is also possible here.

[0092] Fig. 5b shows the drive device 5 according to Fig. 5a in a plan view. The bearing device 13 is essentially C-shaped here, with the at least one spring 12 being connected to the bearing device 13. By rotating an adjusting wheel 20a, 20b, a position of the bearing device 13 in the direction of the longitudinal direction L of the spring 12 relative to the housing 8 and thus the effective force of the spring 12 can be adjusted.

[0093] The at least one adjusting wheel 20a, 20b can be coupled to the bearing device 13 via a worm gear, wherein the projections 23 arranged on the bearing device 13 engage in a spiral guide slot 22 of the adjusting wheel 20a, 20b.

[0094] Fig. 6a shows a third embodiment of a drive device 5 with at least one pivot lever 24 for adjusting a position of the bearing device 13 relative to the housing 8.

[0095] According to possible embodiments, it can be provided that the at least one pivot lever 24

[0096] - has at least one handle element 24a which is arranged outside the housing 8 and is designed for manual operation, and / or

[0097] - is mounted on the housing 8 so as to be pivotable about an axis 25, preferably over an angular range of approximately 180°, and / or - is mounted linearly on the housing 8 over a limited path, and / or

[0098] - is coupled to the at least one bearing device 13 via at least one coupling device 26, preferably wherein the coupling device 26 has at least one coupling contour 26a and at least one coupling element 26b which can engage in the coupling contour 26a.

[0099] In the illustrated embodiment, the coupling contour 26a is arranged on the bearing device 13, and the coupling element 26b is arranged on the pivot lever 24. Of course, the reverse arrangement is also possible here.

[0100] The position of the bearing device 13 relative to the housing 8 can be adjusted by a pivoting movement of the pivot lever 24 about the axis 25 and via the coupling device 26 in a direction parallel to the longitudinal direction L of the spring 12.

[0101] Fig. 6b shows the drive device 5 according to Fig. 6a in a plan view. It can be seen that the axis 25 is guided with play in an elongated hole 28 of the pivot lever 24, whereby the pivot lever 24 can be mounted linearly on the housing 8 over a limited travel.

[0102] The substantially semicircular locking contour 15a may have at least one locking portion 27a, 27b, 27c, preferably two or more locking portions 27a, 27b, 27c, for releasably locking the pivot lever 24.

[0103] In the present case, three locking sections 27a, 27b, 27c are provided, by means of which the pivot lever 24 can be releasably locked in three different pivot positions, thus allowing three different preloads of the spring 12 to be set. For locking, the pivot lever 24 is manually moved into one of the locking sections 27a, 27b, 27c.

[0104] The locking portion 27a extends substantially parallel to a longitudinal direction L of the at least one spring 12. Figs. 7a-7d show a temporal sequence for adjusting the spring force of the drive device 5 according to Figs. 6a, 6b.

[0105] Fig. 7a shows that the position of the bearing device 13 relative to the housing 8 is adjustable by a movement of the pivot lever 24 about the axis 25, wherein the coupling element 26b of the pivot lever 24 is movable along the coupling contour 26a of the bearing device 13 and along the locking contour 15a of the housing 8.

[0106] Fig. 7b shows that the pivot lever 24 has been pressed into the locking section 27b. This linear movement is made possible by the axis 25, which is movable in the elongated hole 28.

[0107] Fig. 7 c shows a continued movement of the pivot lever 24 about the axis 25, wherein the coupling element 26b of the pivot lever 24 is movable along the locking contour 15a of the housing 8.

[0108] Fig. 7d shows the coupling element 26b located in the locking section 27a. The locking section 27a extends substantially parallel to the longitudinal direction L of the spring, wherein the coupling element 26b of the pivot lever 24 is retracted into the locking section 27b by the action of the spring 12.

[0109] Fig. 8a shows a fourth embodiment of a drive device 5 with a pivot lever 24 for adjusting a position of the bearing device 13 relative to the housing 8.

[0110] According to possible embodiments, it can be provided that the pivot lever 24

[0111] - has at least one handle element 24a which is arranged outside the housing 8 and is designed for manual operation, and / or

[0112] - is coupled to the at least one bearing device 13 via at least one coupling device 26, preferably wherein the coupling device 26 has at least one coupling contour 26a and at least one coupling element 26b which can engage in the coupling contour 26a, and / or

[0113] - is arranged on the bearing device 13 so as to be pivotable about an axis 25.

[0114] Fig. 8b shows the drive device 5 according to Fig. 8a in a plan view.

[0115] Fig. 9a-9c show a time sequence for adjusting the spring force of the drive device 5 according to Fig. 8a, 8b, wherein the pivot lever 24 is arranged about an axis 25 on the bearing device 13.

[0116] Fig. 9a shows that the coupling element 26b of the pivot lever 24 can be moved along the locking contour 15a by manually exerting force on the pivot lever 24.

[0117] Fig. 9b shows that the coupling element 26b of the pivot lever 24 can be moved into a first locking position by a manual movement of the pivot lever 24 about the axis 25. If necessary, a locking spring can be used here, which urges the pivot lever 24 toward a locking position.

[0118] Fig. 9c shows that the coupling element 26b of the pivot lever 24 can be moved into a further locking position, in which the spring 12 has a stronger tension than in Fig. 9b. By moving the pivot lever 24 about the axis 25 and by manually pulling on the pivot lever 24, the locking between the pivot lever 24 and the locking contour 15a can be released again.

[0119] Fig. 10a-10c show the drive device 5 according to Fig. 3a, 3a and Fig. 4a-4e according to a slightly modified embodiment.

[0120] Fig. 10a shows the drive device 5 with the housing 8, the spring 12 for applying force to the actuating device 11 and the bearing device 13, via which the at least one spring 12 is mounted with one end on the housing 8. The bearing device 13 can be guided relative to the housing 8 via a guide device 17, wherein the guide device 17 in the illustrated embodiment has two separate guide elements 17b which can be guided along the guide track 17a.

[0121] The housing 8 has at least one recess 30 for at least partially receiving the spring element 16.

[0122] According to possible embodiments, it can be provided that the release element 14a of the release device 14

[0123] - is arranged substantially flush with an outer surface 31 of the housing 8, and / or

[0124] - has at least one projection 33 for engagement with the spring element 16, and / or

[0125] - is partially retractable in the housing 8, and / or

[0126] - can be arranged in a, preferably substantially funnel-shaped, recess 32 of the at least one housing (8), and / or

[0127] - is mounted movably parallel to the mounting surface 29 (Fig. 3a) of the housing 8, and / or

[0128] - is mounted transversely to a longitudinal direction L of the at least one spring 12 so as to be movable.

[0129] To adjust a position of the bearing device 13 relative to the housing 8, the actuating element 18 is pressed in the longitudinal direction L of the spring 12, wherein the locking element 15b is movable against the force of the spring element 16, preferably a compression spring, along the preferably sawtooth-shaped locking contour 15b.

[0130] In the illustrated embodiment, the locking element 15b has a counter-contour adapted to the locking contour 15a. In Fig. 10a, the locking element 15b is located at a first end of the locking contour 15a, with the force of the spring 12 set to a minimum. Fig. 10b shows a further position of the bearing device 13 relative to the housing 8, with the locking element 15b located at a tip of the sawtooth-shaped locking contour 15b.

[0131] Fig. 10c shows a further position of the bearing device 13 relative to the housing 8, wherein the locking element 15b is located at a second end of the locking contour 15b, wherein the force of the spring 12 is set to a maximum.

[0132] The drive device 5 can be used for furniture fittings 4 in the form of drawer slides 4a as well as for other types of furniture fittings 4, for example, in the form of furniture hinges or actuators for flaps. It can also be used in combination with building fittings, for example, for windows or doors.

Claims

Patent claims Drive device (5), preferably ejection device, for a furniture fitting (4) or a building fitting, comprising: - at least one housing (8), - at least one adjusting device (11) movable relative to the housing (8), - at least one spring (12) for applying force to the at least one adjusting device (11), wherein the at least one spring (12) is connected with a first end to the at least one adjusting device (11), - at least one bearing device (13), via which the at least one spring (12) is mounted with a second end on the at least one housing (8), characterized in that the at least one bearing device (13) is adjustable over a limited path relative to the at least one housing (8). Drive device (5) according to claim 1, wherein the at least one bearing device (13) is adjustable between a first position and at least one second position, wherein the at least one spring (12) is more strongly tensioned in the second position than in the first position, wherein at least one release device (14) is provided, with which the at least one bearing device (13) can be reset from the second position into the first position, preferably under the action of the at least one spring (12). Drive device (5) according to claim 2, wherein - the at least one release device (14) is mounted so as to be movable relative to the housing (8) in a direction transverse to a longitudinal direction (L) of the at least one spring (12), wherein the release device (14) has at least one release element (14a) which is arranged outside the housing (8) and / or is at least partially retractable in the housing (8) and is designed for manual actuation, wherein the at least one bearing device (13) is mounted so as to be movable in a direction parallel to a longitudinal direction (L) of the at least one spring (12), wherein the bearing device (13) has at least one actuating element (18) which is separate from the at least one release element (14a) of the release device (14), which actuating element is arranged outside the housing (8) and is designed for manual actuation, and / or - wherein the at least one bearing device (13) and the at least one release device (14) are designed as two structural units mounted on the housing (8) so as to be movable independently of one another, and / or - wherein the housing (8) has a fastening surface (29) for engagement with the furniture fitting (4) or for engagement with a furniture part, wherein the release device (14) has at least one release element (14a) which is movably mounted in a plane parallel to the fastening surface (29) of the housing (8). Drive device (5) according to claim 2 or 3, wherein the at least one release device (14) - has at least one, preferably sawtooth-shaped, locking contour (15a), and / or - at least one release position, in which the release device (14) releases the at least one bearing device (13), and at least one locking position, in which the release device (14) locks the at least one bearing device (13), wherein at least one spring element (16) is provided, which preloads the release device (14) relative to the housing (8) into the locking position, preferably wherein the at least one housing (8) has at least one recess (30) for at least partially receiving the spring element (16) and / or wherein at least one release element (14a) of the release device (14) is arranged substantially flush with an outer surface (31) of the housing (8). Drive device (5) according to one of claims 2 to 4, wherein the at least one release device (14) - is mounted so as to be movable relative to the housing (8) in a direction transverse to a longitudinal direction (L) of the at least one spring (12), and / or - has at least one release element (14a) which is arranged outside the housing (8) and / or at least partially retractable in the housing (8) and designed for manual operation, and / or - has at least one release element (14a) which is movable against the force of a spring element (16) to reset the at least one bearing device (13), and / or - has at least one release element (14a) which can be arranged in a preferably substantially funnel-shaped recess (32) of the at least one housing (8), and / or - at least one release element (14a) which has at least one projection (33) for engagement with a spring element (16). Drive device (5) according to one of claims 1 to 5, wherein the at least one bearing device (13) - is movable relative to the housing (8), preferably linearly displaceable, and / or - is mounted so as to be movable in a direction parallel to a longitudinal direction (L) of the at least one spring (12). Drive device (5) according to one of claims 1 to 6, wherein the at least one bearing device (13) - can be guided relative to the housing (8) via at least one guide device (17), preferably wherein the at least one guide device (17) has at least one guide track (17a) and at least one guide element (17b) which can engage in the guide track (17a), and / or - is substantially L-shaped or substantially U-shaped, and / or - at least one actuating element (18) which is arranged outside the housing (8) and is designed for manual actuation is formed, preferably wherein the at least one actuating element (18) has a longitudinal extension which runs transversely or obliquely to a longitudinal direction (L) of the at least one spring (12). Drive device (5) according to one of claims 1 to 7, wherein at least one locking device (15) is provided, with which the at least one bearing device (13) can be releasably locked to the at least one housing (8), preferably wherein the locking device (15) has at least one locking contour (15a) and at least one locking element (15b) which can engage in the locking contour (15a). Drive device (5) according to claim 8, wherein - the locking element (15b) is arranged on the at least one bearing device (13), and / or - the locking element (15b) is substantially cylindrical or has a counter-contour adapted to the locking contour (15a), and / or - at least one guide track (19) is provided on the housing (8), in which the locking element (15b) can be guided. Drive device (5) according to claim 8 or 9, wherein the locking contour (15a) - is movable relative to the housing (8), preferably linearly displaceable, and / or - is movable relative to the housing (8) against the force of a spring element (16). Drive device (5) according to one of claims 8 to 10, wherein the locking contour (15a) - is movable in a direction transverse to a direction of movement of the bearing device (13), and / or - is sawtooth-shaped, wavy or semicircular, and / or at least one locking section (27a) which runs substantially parallel to a longitudinal direction (L) of the at least one spring (12). Drive device (5) according to one of claims 1 to 11, wherein at least one adjusting device (20) is provided, with which the bearing device (13) can be adjusted relative to the housing (8), preferably wherein the adjusting device (20) - has at least one adjusting wheel (20a, 20b), wherein the adjusting wheel (20a, 20b) is arranged on the housing (8) so as to be rotatable about an axis extending transversely to the longitudinal direction (L) of the at least one spring (12) and / or has at least one circumferential actuating contour (21) which is arranged at least partially outside the housing (8) and is designed for manual actuation, and / or - has at least one spiral guide slot (22) which cooperates with a plurality of spaced-apart projections (23). Drive device (5) according to one of claims 1 to 12, wherein at least one pivot lever (24) is provided, with which the bearing device (13) can be adjusted relative to the housing (8). Drive device (5) according to claim 13, wherein the at least one pivot lever (24) - has at least one handle element (24a) which is arranged outside the housing (8) and is designed for manual operation, and / or - is mounted on the housing (8) or on the bearing device (13) so as to be pivotable about an axis (25), preferably over an angular range of approximately 180°, and / or - is mounted linearly on the housing (8) over a limited distance, and / or - is coupled to the at least one bearing device (13) via at least one coupling device (26), preferably wherein the coupling device (26) has at least one coupling contour (26a) and at least one coupling element (26b) engageable in the coupling contour (26a). A furniture fitting (4) or building fitting with at least one drive device (5) according to one of claims 1 to 14. A piece of furniture (1) with a furniture body (2), a furniture part (3) mounted so as to be movable relative to the furniture body (2), and with at least one drive device (5) according to one of claims 1 to 14 or with at least one furniture fitting (4) according to claim 15 for driving the movable furniture part (3) relative to the furniture body (2).

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