Drive device for a movable furniture part

Abstract

Drive device for a movable furniture part (3, 105, 106, 203, 303, 305), comprising a latchable ejection device (6) by means of which the movable furniture part (3, 105, 106, 203, 303, 305) can be ejected from a closed position in the opening direction by means of a linearly movable driver (12, 117, 209, 313) pre-tensioned by a power storage device (22), and a locking device by means of which the driver (12, 117, 209, 313) can be locked when the power storage device (22) is tensioned, wherein an actuating element (50) is movable by the driver (12, 117, 209, 313) for unlocking the locking device, wherein the actuating element (50) is for unlocking the The locking device is movable by an actuating element provided on the ejection device (6), wherein at least two spaced-apart connections (81, 86, 86', 94) are provided on the ejection device (6), wherein at least one connection (81, 86, 86',94) is provided for coupling with the actuating element by means of which the locking device can be unlocked, characterized in that the actuating element comprises a rotatable shaft (90) which is mounted on a housing (10) of the ejection device (6) and the rotatable shaft (90) protrudes on opposite sides of the housing (10) and forms connections for an actuating mechanism.

Description

[0001] The present invention relates to a drive device for a movable furniture part, comprising a latchable ejection device by means of which the movable furniture part can be ejected from a closed position in the opening direction by means of a linearly movable driver pre-tensioned by a power storage device, and a locking device by means of which the driver can be locked when the power storage device is tensioned, wherein an actuating element is movable by the driver for unlocking the locking device, wherein at least two spaced-apart connections are provided on the ejection device, wherein at least one connection is provided for coupling with the actuating element by means of which the locking device can be unlocked.

[0002] German patent DE 10 2012 102 211 A1 discloses an ejection device for a movable furniture component, in which a lever is rotatably mounted about an axis and pre-tensioned to a housing via a power storage device. By pivoting the lever through the act of pushing a drawer from the closed position into an over-press position, a locking device can be unlocked, so that the drawer is ejected as a movable furniture component via the pivotable lever. Such an ejection device requires a comparatively large amount of installation space in the rear area of ​​the drawer. Furthermore, the distance over which the lever is in contact with the drawer during ejection is relatively short.

[0003] It is therefore an object of the present invention to create a drive device for a movable furniture part which has a compact design and enables effective ejection of the movable furniture part.

[0004] This problem is solved with a drive device having the features of claim 1.

[0005] The drive device according to the invention comprises a linearly movable driver pre-tensioned by a power storage device, by means of which a movable furniture part can be ejected from the closed position in the opening direction. This allows the movable furniture part to be coupled to the driver over a comparatively long distance. Furthermore, a locking device is provided, which can be unlocked via the driver when the driver acts on an actuating element of the locking device, and can also be unlocked via an actuating element provided on the ejection device. Thus, the ejection device can be unlocked either by movement of the actuating element and / or by the actuating element.

[0006] The ejection device is provided with at least two spaced-apart connections, at least one of which is for coupling to the actuating element. The locking device can be unlocked via these connections. The two, or preferably three, spaced-apart connections allow the ejection device to be adapted to different installation situations, depending on where the connection is to be made, for example, to another ejection device or a mechanical sensor that detects, for instance, movement of a front panel. The large number of connections for linking the actuating element to the mechanical sensors or other ejection devices enables a high degree of flexibility.

[0007] In one embodiment according to the invention, the actuating element comprises a rotatable shaft mounted on a housing of the ejection device. Projecting sections are provided on opposite sides of the housing of the rotatable shaft, serving as "connections" for linking to further actuating mechanisms. The shaft can also include at least one radially projecting projection that engages with the actuating element, so that the actuating element is displaced when the shaft rotates. The actuating element can be slidably mounted on the ejection device and pre-tensioned to a starting position by a spring.

[0008] To enable tensioning of the energy storage device at a distance from a closed position, the ejection device has a slide pre-tensioned by the energy storage device. A control element is slidably guided on this slide and is coupled on one side to the driver via a cam track and on the other side to a guide track of the ejection device. The control element then allows tensioning of the energy storage device at a distance from a closing area, so that a retraction device can be effective in the closing area.

[0009] For simple locking of the ejection device in a closed position, it can have a control element that is guided in a guide track of the ejection device, wherein the movable actuating element and the guide track form a locking area in which a pin of the control element can be placed.

[0010] In a further embodiment, two spaced-apart ejection devices are provided, each with a power storage device and a driver, whose locking mechanisms are connected to each other via synchronization means. The synchronization means can comprise a rotatable or slidable rod or be formed by a cable pull. Preferably, a rotatable rod is provided. The rotatable rod can also be arranged spaced apart from the axis of the actuating elements, with a transmission mechanism provided on both ejection devices to convert a movement of the actuating element into a rotational movement of the rod. This allows synchronization by the rod to occur at different positions in the furniture, for example, if a rear area is obstructed due to a siphon beneath a sink.

[0011] The invention is explained in more detail below with reference to several exemplary embodiments and the accompanying drawings. These show: Fig. 1 a perspective view of a piece of furniture according to the invention; Fig. 2 a top view of the furniture of Fig. 1 with drawer open; Fig. 3 a view of the furniture of Fig. 1 without drawers; Fig. 4 a view of two drawer guides, each having an ejection device; Fig. 5 a perspective view of a drawer guide with an ejection device; Fig. 6 a view of the extension guide and the ejection device of the Fig. 5, partly in an exploded view; Fig. 7 a view of the ejection device, partly in section; Fig. 8A and Fig. 8B two detailed views of the ejection device of the Fig. 7 with different positions of the rotatable shaft; Fig. 9A and Fig. 9B two exploded views of the ejection device of the Fig. 3; Fig. 10 a view of the housing of the ejection device of the Fig. 3; Fig. 11A and Fig. 11B two views of the ejection device of the Fig. 7 in a closed position; Fig. 12A and Fig. 12B two views of the ejection device of the Fig. 7 in an overpressure position; Fig. 13A and Fig. 13B two views of the ejection device of the Fig. 7 at the beginning of an opening process; Fig. 14A and Fig. 14B two views of the ejection device of the Fig. 7 when unlocking the actuator; Fig. 15A and Fig. 15B two views of the ejection device of the Fig. 7 in an open position; Fig. 16A and Fig. 16B two views of the ejection device of the Fig. 7 during the clamping process during a movement in the closing direction, Fig. 17A and Fig. 17B two views of the ejection device of the Fig. 7 in an overpressure position; Fig. 18A and Fig. 18B two views of the ejection device of the Fig. 7 with blocked switching element; Fig. 19 a perspective view of an ejection device according to a modified embodiment; Fig. 20 a perspective view of a piece of furniture according to a further embodiment with the sliding element in an open position; Fig. 21A to 21C several detailed views of the furniture Fig. 20; Fig. 22 a perspective view of a further embodiment of a piece of furniture according to the invention; Fig. 23A and Fig. 23B two perspective views of the ejection device of the furniture Fig. 22; Fig. 24 a side view of the furniture of the Fig. 22 with the drawer in the closed position; Fig. 25 a perspective view of a further embodiment of a piece of furniture according to the invention; Fig. 26 a perspective view of the drawer guides and ejection devices of the furniture of the Fig. 25; Fig. 27 a perspective view of an ejection mechanism for a piece of furniture after Fig. 25 without drawer and without inner drawer; and Fig. 28A and Fig. 28B two detailed views of the ejection mechanism of the Fig. 27; Fig. 29 a perspective view of a opposite Fig. 19 modified ejection devices; Fig. 30 a detailed view of an ejection device of the Fig. 29 without the housing part, and Fig. 31 a cutaway view through the ejection device of the Fig. 29 through the housing part.

[0012] A piece of furniture 1 comprises a furniture carcass 2 on which one or more drawers 3 are slidably mounted. Each drawer has a front panel 4 which, in the closed position, is positioned just in front of the furniture carcass 2 and can be pushed from the closed position into an overpressure position towards the furniture carcass 2 in order to unlock an ejection device 6 by means of which a drawer 3 can be ejected from the closed position in the opening direction. Fig. 1 is an upper drawer 3 which has a recess in the rear area, for example because a drain pipe or another element occupies this space.

[0013] In Fig. Figure 2 shows the upper drawer 3 in an open position, and it can be seen that the drawer 3 is mounted on opposite sides on a pull-out guide 5 which has three rails.

[0014] In Fig. Figure 3 shows the furniture carcass 2 without the drawers 3. An ejection device 6 is mounted on each drawer slide 5, each ejection device having a linearly movable driver 12 that is biased in the opening direction by a force storage device. By coupling the driver 12 with the drawer of the ejection device 6, the drawer 3 can be ejected in the opening direction after the locking mechanism is released. The two ejection devices 6 are coupled to each other via synchronization means, so that if one locking mechanism is released, the other locking mechanism on the ejection device 6 is also released.The synchronization means comprise a rod 80, which is arranged in a central area of ​​the ejection device 6 in the upper drawer 3, so that a rear installation space can be occupied by other components, such as drain pipes, while in the lower drawer the rod 80 is provided in a rear area of ​​the ejection device 6.

[0015] Each drawer slide 5 can be coupled with a self-closing mechanism to retract the drawer 3 in the closing direction and hold it in the closed position before it reaches a closed position. Before the closing area where the self-closing mechanism is active, a power storage device of the ejector 6 can be charged by moving the driver 12 along a guide 11 on a housing 10 of the ejector 6 in the closing direction. Each drawer slide is fixed to a side wall of the furniture carcass 2 by means of a retaining bracket 9.

[0016] In Fig. Figure 5 shows an extension guide 5 with an ejection device 6. The driver 12 is linearly guided on a housing 10 of the ejection device 6, wherein a locking device for the ejection device 6 is arranged in the housing 10, which can be unlocked either by a movement of the driver 12 or by an actuating element in the form of a rotatable shaft 90. As shown in the exploded view of the Fig. As shown in Figure 6, the rotatable shaft 90 includes a radially projecting projection 91 which acts on an actuating element 50 of the locking device to release it. The rotatable shaft 90 includes a section 81 projecting from the housing 10 and, on the opposite side, a projecting section 94. Sections 81 and 94 form connections on which actuating mechanisms for releasing the locking devices or for actuating other auxiliary functions can be mounted. In the lower drawer 3, a rotatable rod 80 is non-rotatably mounted on section 81 to synchronize two ejection devices 6. In the upper drawer 3, an actuating section 92 is provided adjacent to section 81, on which a projection 93 is integrally formed that engages in an opening 85 of a strip 84.The strip 84 has openings 85 on opposite sides and is guided between the housing 10 and a cover plate 83, which can be snapped onto the housing 10. A projection 88 of a rotating part 87, which is integrally formed on a coupling element 86, engages in the second opening 85. The coupling element 86 is inserted into a rod 80 and is rotationally fixed to it. The locking device can thus be unlocked either via the coupling element 86 and the rod 80 or via the projecting section 81 on the rotatable shaft 90. The rotatable shaft 90 is rotatably mounted on a bearing receptacle 95 on the housing 10.

[0017] In Fig. Figure 7 shows the ejection device 6 in section, in particular the rotatable shaft 90 on the bearing mount 95 being visible. In a first position, which is shown in detail in Figure 7, the ejection device 6 is shown in section 7, in which the rotatable shaft 90 on the bearing mount 95 is particularly visible. In a first position, which is shown in detail in Figure 7, the ejection device 6 is shown in section 7. Fig. As shown in Figure 8A, the protruding projection 91 is in a starting position and is arranged on a receptacle 58 of an actuating element 50. By rotating the rotatable shaft 90, the protruding projection 91 moves the actuating element 50 against the force of a spring 68 until the Fig. The position shown in Figure 8B is reached, in which the locking device is unlocked. After unlocking, the drawer 3 can be ejected and the actuating element 50 can be moved back to its starting position by the spring 68, so that the rotatable shaft 90 is also pivoted back to its starting position.

[0018] The following section explains the ejection device 6 in detail: As in the Fig. 9A and Fig. As shown in Figure 9B, a slide 30 is located inside the housing 10 and is slidably mounted in a receptacle 20 in the longitudinal direction of the housing 10. A bracket 21 is located on one end face of the receptacle 20 of the housing 10 to secure one end of a force storage element in the form of at least one spring 22, in particular a tension spring. Two springs 22 are provided, each arranged in a spring receptacle 31 on the slide 30. An opposite end of the spring 22 is fixed to a spring holder 32 on the slide 30, so that the slide 30 is pre-tensioned against the housing 10 in the opening direction. The number and the respective spring characteristics of the springs 22 can be selected depending on the intended use of the drive device. The housing 10 can be closed by means of a cover 14.

[0019] The slide 30 also has a receptacle 33 for guiding a control element 40. Side walls 38 are arranged on the receptacle 33, which guide the control element 40 essentially perpendicular to the opening direction. The receptacle 33 also has a recess 37 on one side wall 38, through which a projecting web 43 of the control element 40 can be inserted, allowing the control element 40 to be inserted into the recess 33. The control element 40 is plate-shaped and has projecting sliding elements 44 that bear against the side walls 38 of the receptacle 33.

[0020] The control element 40 comprises a first pin 41, which is guided in a guide track 17 on the housing 10. The control element 40 also includes a second pin 42, which is guided on the driver 12. For this purpose, a guide track 16 is formed on the driver 12.

[0021] The slide 30 also has a cam guide 34 in which a gear 36 is guided. The gear 36 engages in the cam guide 34 with a detent projection 35 and is part of a backstop. A rack 19 is formed on the housing 10, as shown in the detailed view of the Fig. 5 is recognizable. The gear 36 is guided by a pin in a loop-shaped guide track 18 of the housing 10, with one section of the guide track 18 running past the rack 19 in the clamping direction, while a section for an opening movement guides the gear 36 at a distance from the rack 19. If a clamping operation of the ejection device 6 is aborted, the gear 36 engages in the rack 19 and thus prevents ejection of the movable furniture part 3. Such a backstop is described, for example, in DE 10 2016 107 918. Such a backstop is advantageous for the present ejection device, but can optionally be omitted.

[0022] The housing 10 also includes an actuating element 50, which is slidably held in an actuating element receptacle 26 on the housing 10. For this purpose, a box-shaped section 55 engages in the actuating element receptacle 26, while a web 56 is received on an end section 27 of the housing 10. A bearing 52 for a rotatable switching element 60 is formed on the actuating element 50. The switching element 60 has a lever arm with a pressure piece 62 at its end. An elongated recess 61 is provided on the axis of rotation of the switching element 60, into which a web 66 of a rotary damper 65 engages. The rotary damper 65 is rotationally fixed to the switching element 60. The rotary damper 65 is held on the actuating element 50 by a cantilever 67, so that when the switching element 60 rotates, the rotary damper 65 is actuated and generates a braking effect.The rotatable switching element 60 further has a protruding arm 63 which interacts with stops on the actuating element 50 to limit the rotational movement of the switching element 60.

[0023] The actuating element 50 is pre-tensioned to a starting position by a spring 68. The spring 68 is supported in a spring receptacle 69 on the actuating element 50, with one end of the spring bearing against the actuating element 50 and the opposite end against a wall of the housing 10. The spring 68 is designed as a compression spring and thus pre-tensions the actuating element 50 in the opening direction.

[0024] A spring clip 64 is also mounted on the actuating element 50, which biases the switching element 60 into a first position. The spring clip 64 rests at one end against the arm 63 and is supported at the opposite end by the actuating element 50.

[0025] The actuating element 50 also has a web 53 on which a part 51 of a detent receptacle for the pin 41 of the control element 40 is provided. The part 51 of the detent receptacle is designed as a projection. The web 53 also has a detent lug 54, which can ensure that the actuating element 50 is detented on the housing 10.

[0026] In the Fig. 9A and Fig. Figure 9B also shows a control rocker 70, which serves to actuate the switching element 60. The control rocker 70 is rotatably mounted about a pivot axis 71, which is inserted into a bearing receptacle 74 on the housing 10. The control rocker 70 has a projection 72 that acts on the switching element 60 to pivot it. Furthermore, a guide cam 73 is provided on the control rocker 70, which interacts with the driver 12. When the driver 12 is moved along the housing 10, it can pivot the control rocker 70 about the pivot axis 71 and thus actuate the switching element 60. A cam guide 75 for the guide cam 73 is formed on the driver 12 to ensure that the switching element 60 is actuated only over a defined path of the driver 12.

[0027] In Fig. Figure 10 shows the housing 10 without the cover 14 and the other components. A guide track 17 for the first pin 41 of the control element 40 is formed on the housing 10. The guide track 17 is loop-shaped. A first part 23 of a detent receptacle is provided on the guide track 17, against which the pin 41 can be placed to detent or lock the ejector 6. The second part 51 of the detent receptacle is formed on the actuating element 50. When the second part 51 of the detent receptacle is arranged adjacent to the first part 23 of the detent receptacle, the detent receptacle is in a closed position, and the pin 41 can be placed there to lock the ejector 6 in a closed position.When the actuating element 50 is moved relative to the housing 10, the second part 51 of the detent receptacle moves away from the first part 23, so that the detent receptacle is moved into the unlocking or release position and the pin 41 can no longer be placed in the detent receptacle.

[0028] Furthermore, a detent projection 25 is formed on the housing 10 in the area of ​​the guide track 17, which interacts with the detent lug 54 on the actuating element 50 in order to be able to lock the actuating element 50 in an unlocking or release position for the control element 40.

[0029] The operation of the ejection device 6 is described below with reference to the Fig. 11, Fig. 12, Fig. 13, Fig. 14, Fig. 15, Fig. 16, Fig. 17 to Fig. 18 explained in more detail, with these figures each showing two sectional views through the ejection device 6, which are partly arranged in different planes in order to better follow the position of the pins 41 and 42 in the area of ​​the driver 12 and the guide track 17.

[0030] In the Fig. 11A and Fig. In 11B, the ejector 6 is in a closed position. In the closed position, the pin 41 of the control element 40 is in the detent recess formed by the first part 23 on the housing 10 and the second part 51 on the actuating element 50. The detent recess is in the closed position, and the ejector 6 is latched against the force of the springs 22 via the pin 41 and the detent recess. The second pin 42 of the control element is located at an angled end of the guide track 16 on the driver 12.

[0031] To unlock the ejection device 6, the movable furniture part 3 or the drawer is moved from the closed position into an overpressure position, as shown in the Fig. 12A and Fig. Figure 12B shows the control element 40 being pressed against the force of the springs 22, which are held on the slide 30. The movable furniture part 3 acts on the control element 40 via the driver 12 and the pin 42. Pressing in the movable furniture part 3 causes the first pin 41 to press against the pressure piece 62 on the switching element 60, which moves the actuating element 50 relative to the housing 10 against the force of the spring 68. The movement of the actuating element 50 also shifts the second part 51 of the detent receptacle relative to the first part 23.

[0032] For an opening movement, the pin 41 can now pass through the gap between the first part 23 of the detent receptacle and the second part 51, as shown in the Fig. 13A and Fig. Figure 13B shows that the follower 12 is coupled to the control element 40 in the extension direction via the second pin 42, so that the movable furniture part is ejected by the follower 12. The actuating element 50 is pressed in the opening direction by the spring 68 until the locking lug 54 rests against the locking projection 25 of the housing 10. The locking of the actuating element 50 keeps the detent in a release position. The distance between the two parts 23 and 51 of the detent is such that the pin 41 can pass between them.

[0033] Due to the springs 22, the carriage 30 with the control element 40, and consequently also the driver 12 with the movable furniture part 3, is moved further in the opening direction until the in Fig. The position shown in Figure 14 is reached. The first pin 41 on the control element 40 runs against a chamfer 57 on the bridge 53 and thus releases the detent lug 54 from the detent projection 25. This allows the actuating element 50 to be moved further in the opening direction by the force of the spring 68 in order to close the detent receptacle.

[0034] The movable furniture part 3 is now moved further in the opening direction until the first pin 41 contacts a ramp 45 of the guide track 17 to move the control element 40 on the carriage 30. This causes the second pin 42 to move out of the angled end section of the guide track 16 and thus be able to move along the central section of the guide track 16, which is slightly inclined to the opening and closing direction, in order to move the driver 12 further along the guide 11 on the housing.

[0035] In the Fig. 15A and Fig. Figure 15B shows a position of the ejection device 6 in which the movable furniture part 3 can move away from the driver 12. The second pin 42 has been moved to the angled end section of the guide track 16, and the first pin 41 is located at a pointed end of the guide track 17.

[0036] To return the movable furniture part to a closed position, the activator is moved against the driver 12, which is coupled to the control element 40 via the second pin 42. The control element 40 thus moves together with the carriage 30 in the closing direction, thereby tensioning the springs 22. The pin 41 moves in the Fig. 15 and Fig. 16 in the left track of the loop-shaped guide rail 17. When the spring 22 is tensioned, the backstop is also activated by the gear 36, which is moved along the rack 19 on the housing. Should the tensioning process be aborted, the gear 36 of the backstop secures the previously tensioned position of the slide 30.

[0037] As the driver 12 continues to move in the closing direction, the springs 22 are tensioned via the slide 30, and an edge of the driver 12 with the cam guide 75 comes into contact with the guide cam 73 on the control rocker 70. When the driver 12 presses against the guide cam 73, the control rocker 70 pivots about the axis of rotation 71 and, with its arm 72, presses against the switching element 60. This pivots the switching element 60 from the first position, in which unlocking of the ejection device is possible, to a second position, in which unlocking of the ejection device 6 is not permitted. Although the pin 41 is already in the detent receptacle, the ejection device 6 cannot be triggered because the switching element 60, which can establish a connection between the pin 41 and the actuating element 50, is in the pivoted position.As the pin 41 moves into the detent recess, the second pin 42 also emerges from the angled end section of the guide track 16 and can be moved along the driver 12. In this area, for example, between the closed position and 40 mm before the closed position, a self-closing mechanism can now become effective, which is, for example, located on the drawer slide.

[0038] Such a self-closing mechanism pulls the movable furniture part into a closed position, preferably incorporating a damper that slows down the closing movement of the movable furniture part. This eliminates the need for the user to exert any operating force, allowing the self-closing mechanism to control the movable furniture part. When the follower 12 is slowly moved into the closed position by the self-closing mechanism, the cam guide 75 with a recess engages the guide cam 73, allowing the control rocker 70 to pivot by the force of the spring 64. The switching element 60 is then pivoted back to its initial position by the force of the spring 64, enabling the release of the ejection device 6. The second pin 42 is then located at the angled end section of the guide track 16, and the... Fig. 11A and Fig. The closing position shown in 11B is reached. In this type of closing process, the drawer is not pushed beyond the closed position into the overpressure position, and the user can immediately unlock the ejection device 6 again after reaching the closed position, since unlocking is made possible by pivoting the switching element 60 into the first position when the closing position is reached.

[0039] However, it can happen that the movable furniture part is unintentionally moved manually beyond the closed position into the overpressure position, or that it is moved beyond the closed position due to excessive closing speed of the movable furniture part 3. Then the [unclear] in the Fig. 18A and Fig. The overpressure position shown in Figure 18B has been reached. In the overpressure position, the control rocker 70, due to the cam guide 75 on the driver 12 and the guide cam 73, has caused the switching element 60 to pivot from the first position to the second position, as shown in the Fig. 18A and Fig. Figure 18B shows the latching mechanism in the closed position, but the pin 41 is positioned at a distance from it. The pin 41 does not rest against an end face of the pressure piece 62, but rather against its side, so that no closing forces can be applied to the switching element 60 by the pin 41. When the movable furniture part is released in the overpressure position, the springs 22 ensure that the driver 12 and the control element 40 are moved relative to the housing 10 in the opening direction until the first pin 41 is placed against the latching mechanism, which is formed by the first part 23 on the housing 10 and the second part 51 on the actuating element 50, and which is located in the Fig. 11A and Fig. The position shown in Figure 11B is reached. When the pin 41 rests on the detent receptacle, the driver 12 simultaneously moves along the housing 10, so that the guide cam 73 is released via the cam guide 75 to such an extent that the switching element 60 can be pivoted from the second position to the first position by the force of the spring 64. An opening process can thus be carried out again immediately after reaching the closed position. If it is desired that a further opening can only be carried out after a certain period of time, the return pivoting movement of the switching element 60 can be slowed down by the rotary damper 65, depending on the desired waiting time. However, such a time delay is only optional, since immediate opening is also possible after the movable furniture part has been forced into the over-pressure position, as soon as the movable furniture part has reached the closed position.For the delayed return pivoting or retraction movement, a linear damper or another mechanical timing element can also be provided. Simple mechanical timing elements include, for example, suction cups with a small hole that release contact with a surface due to the inflowing air, or an elastomer with a slowed return movement. When using an elastomer, the spring 64 for the return movement can be omitted, since the elastomer itself can exhibit a spring effect.

[0040] In Fig. Figure 19 shows a modified ejection device 6 in which, as in the preceding embodiment, a linearly movable driver 12 and a bearing receptacle 95 for a rotatable shaft 90 are provided on the housing 10. The rotatable shaft 90 comprises a projecting section 81 and a second projecting section 94', to which actuating mechanisms can be connected. Additionally, a further projecting section 86' is formed on the ejection device 6, which, by rotation, can move the actuating element 50 for unlocking.This provides three spaced-apart connections on the ejection device 6 for connection to an actuating mechanism, so that, depending on the installation situation, one or more of these connections can be used to couple the ejection device 6 with another ejection device 6 or a mechanical sensor by means of which a signal for an opening movement can be detected.

[0041] In Fig. Figure 20 shows a further embodiment of a piece of furniture 101. The piece of furniture 101 comprises a cabinet 102 having two side walls 103 on opposite outer sides and a central partition 104. A drawer element is movably mounted on the cabinet 102, comprising a first drawer 105 and a second drawer 106. The front of both drawers 105 and 106 is covered by a common front panel 107, which extends over the entire width of the cabinet 102. Each drawer 105 and 106 is movably mounted on two drawer slides 110.

[0042] In Fig. Figure 21A shows the furniture 101 without the drawer element. Each drawer slide 110 comprises a stationary guide rail 111 fixed to the furniture carcass 102, a center rail 112, and a movable running rail 113 on which the drawer 105 or 106 rests. A drawer slide 110 is mounted on opposite sides of the partition 104 and also on the inside of both side walls 103. If the furniture carcass 102 is wider, a drawer slide 110 can also be mounted on another partition 104 instead of an outer side wall 103. Furthermore, each drawer slide 110 can have two or more than three rails that are movable relative to each other, instead of three.

[0043] Each extension guide 110 is provided with an ejection device 6, as shown in the Fig. 9, Fig. 10, Fig. 11, Fig. 12, Fig. 13, Fig. 14, Fig. 15, Fig. 16, Fig. 17 to Fig. 18 is described in detail. A driver 117 is movable on the housing of each ejection device 6. This driver can be brought into engagement with an activator 118 on the guide rail 113 to move the guide rail 113, and thus the drawer 105 or 106, in the opening direction. When the drawer 105 or 106 is moved in the closing direction, the driver 117 can be moved in the closing direction via the activator 118 to tension the energy storage device and lock the driver 117 in an end position. Unlocking can be achieved, for example, by pressing the front panel 107 from the closed position into an over-press position. During such an unlocking process, it is possible that pressing the front panel 107 will unlock only one ejection device 6, while the other ejection devices 6 remain locked.To prevent the sliding element from remaining in the closed position, the two ejection devices 6 of a drawer 105 or 106 are each coupled to each other via a connecting rod 115. This rod ensures that when one ejection device 6 is unlocked, the other ejection device 6 is also unlocked. Additionally, synchronization means are provided, comprising a rod 116 that synchronizes the ejection devices 6 of the two drawers 105 and 106, so that when an ejection device 6 of one drawer 105 or 106 is unlocked, an ejection device 6 of the other drawer 105 or 106 is also unlocked.

[0044] The area of ​​synchronization tools is shown in the detailed views of the Fig. 21B and Fig. Figure 21CB shows the ejection devices 6 being fixed to the extension guide 110 by a housing and having a bearing receptacle 95 in which an actuating rod 121 is rotatably mounted. The actuating rod 121 has a first end section 122, which is rotationally fixed to the connecting rod 115. On the opposite side, the actuating rod has a connecting section 123, which is rotationally fixed to a lever 124. A receptacle 125 is formed on the lever 124, into which the connecting section 123 is inserted. A projection 126 is also located on the lever 124, which is inserted into a receptacle 127 of the rod 116. The rod 116 passes through an opening 128 in the partition 104 and thus connects the two levers 124 to each other, which are rotatably coupled to the two actuating rods 121 on the ejection devices 6.The ejection devices 6 thus have two connections or interfaces, each connection being suitable for coupling with a synchronization device. When the front panel 107 is moved from the closed position into an overpressure position, the activators press on the movable drivers 117, which are also pressed in the closing direction and thus unlock a latching mechanism in the ejection devices 6. This rotates the actuating rod 121, which causes the levers 124 to pivot, so that all four ejection devices 6 are unlocked simultaneously, even if the front panel 107 is only pressed in on one side and the pressing movement on the opposite side would not yet be sufficient to unlock the ejection device 6. Unlocking can therefore also be achieved if the front panel 107 is tilted during pressing.By unlocking the ejection devices 6, the driver 117 on each ejection device 6 can now be moved by the energy storage device in the opening direction, so that the two drawers 105 and 106 are also ejected in the opening direction via the activators 118. To tension the energy storage devices, the driver 117 is brought into its initial position via the activators and locked there.

[0045] In Fig. Figure 22 shows a piece of furniture 201 with a furniture carcass 202, on which a drawer 203 is mounted so as to be movable. The drawer 203 has a front panel 204 on its front, which extends well above the drawer 203.

[0046] In the Fig. 23A and Fig. Figure 23B shows the furniture 201 without the drawer 203. A drawer guide 205 is provided on opposite side walls of the furniture carcass 202. This guide has a movable track 206 on which the drawer 203 is supported. The drawer guide 205 is fixed to a mounting bracket 207, which is fixed to the side wall. A holder 250 is also provided to fix a housing 208 of an ejection device 6. Each drawer guide 205 has a housing 208, and synchronizing means 210 in the form of a rod are provided to enable the simultaneous unlocking of both ejection devices.

[0047] Each housing 208 has a drive element or driver 209 pre-tensioned by a power storage device, which is movable along a guide on the housing 208 and is held in a closed position by a locking device.

[0048] An actuating shaft 211, which serves to unlock the locking device, is rotatably mounted on the housing 208. The actuating shaft 211 is non-rotatably connected on one side to the rod of the synchronizing means 210 and on the opposite side to a shaft 212, which is coupled to a mechanical sensor. For this purpose, the shaft 212 is connected via a deflecting element 213 to a vertical shaft 214, which is held at an upper bearing 215. Above the bearing 215 is a linearly movable plunger 216, which can be actuated from a closed position to an overpressure position by pressing the front panel 204. The plunger 216 is located behind a cover 217.

[0049] The plunger 216 is further biased into a protruding position by a spring 290. A rack section 218 is formed on the plunger 216, which engages with a toothed ring on the vertical shaft 214. When the plunger 216 is moved in the inward direction, the vertical shaft 214 is rotated, which transmits this rotational movement to the shaft 212 via a gear drive, so that the movement of the plunger 216 can also rotate the actuating shaft 211 to unlock a locking device in the housing 208.

[0050] In Fig. Figure 24 shows the drawer 203 in the furniture carcass 202, in which the front panel 204 has been moved from a closed position to an over-press position. In an upper area of ​​the front panel 204, the plunger 216 rests against an inner surface, thus detecting a pressing motion. If the front panel 204 is pressed in at a lower point, the follower 209 also moves slightly in the closing direction, so that the locking mechanism can be released via the follower 209. Since the front panel 204 has a certain degree of movement, the locking mechanism can be triggered both by the follower 209 and by the mechanical sensor with the plunger 216.

[0051] In Fig. Figure 25 shows a piece of furniture 301 with a furniture carcass 302 on which a drawer 303 and an inner drawer 305 are movably mounted. The inner drawer 305 is concealed in a closed position, and a front panel 304 of the drawer 303 completely covers a front panel 306 of the inner drawer 305. It is also possible that more than one inner drawer 305 is movably mounted on the furniture carcass 302, concealed behind the front panel 304.

[0052] Both the inner drawer 305 and the drawer 303 are movably mounted on two extension guides 308, each of which is attached to a mounting bracket 307 on the furniture carcass 302. Each of the extension guides 308 comprises a stationary guide rail 309, a center rail 310, and a movable running rail 311. To open the drawer 303, the front panel 304 is pressed from the closed position into an overpressure position towards the furniture carcass 302 in order to unlock a locking mechanism of an ejection device 6.

[0053] A stationary holder 380 is fixed to a drawer slide 308 for the drawer 303. An ejection device 6 is mounted on this holder. A driver 313 is movably mounted on a guide on the ejection device 6 and can be connected to a coupling element on the drawer 303 or the running rail 311 to eject the drawer 303 in the opening direction. The two ejection devices 6 are coupled to each other via a rotatable rod 314 so that if a locking device on one ejection device 6 is released, the locking device on the other ejection device 6 is also released. This causes the drawer 303 to be ejected simultaneously on opposite sides in the opening direction by a driven driver 313 when a release has occurred.

[0054] The inner drawer 305 can also be driven via an ejection device 6, on which a driven driver 313 is linearly guided and can be coupled to a coupling element on the inner drawer 305 or to a guide rail 311 on the inner drawer 305 in order to eject in the opening direction. The two ejection devices 6 are coupled to each other via a rotatable rod 317 so that, when a locking device of one ejection device is unlocked, the locking device of the other ejection device 315 is also unlocked.

[0055] In Fig. Figure 26 shows the drawer slides 308 with the ejection devices 6, without the furniture carcass 2, drawer 303, and inner drawer 305. The first ejection devices 6 for the drawer 303 are synchronized with the second ejection devices 6 for the inner drawer 305, so that when the first two ejection devices 6 are unlocked, the second ejection devices 6 are also unlocked. Synchronization means are provided for this purpose, comprising a vertical rotatable rod 321 arranged between two deflection devices 320. The deflection devices 320 are cup-shaped and can be inserted into a recess on a side wall of the furniture carcass 302. At the deflection devices 320, a rotation of the vertical rod 321 into a rotation of a shaft 319 is effected, which establishes a connection between the rotatable vertical rod 321 and the locking device of one of the ejection devices 6.This synchronizes all four ejection devices 6 with each other.

[0056] Unlocking is achieved by pressing the front panel 304 in the closing direction. The distance between the front panel 304 and the front panel 306 of the inner drawer 305 can be selected such that no contact occurs and only the drawer 303 moves in the closing direction, unlocking at least one of the first two ejection devices 6. This ejection device then unlocks the other three ejection devices via the synchronization means. Alternatively, the front panel 306 of the inner drawer 305 can rest against the front panel 304 of the drawer 303 in the closed position. Pressing the front panel 304 simultaneously moves the inner drawer 305 in the closing direction, thus unlocking a second ejection device 6 and subsequently unlocking the other three ejection devices 6.

[0057] In Fig. 27 shows a modified ejection mechanism as used in a piece of furniture according to Fig. 25, which has a drawer 303 and an inner drawer 305, which are movably mounted on extension guides 308. The two ejection devices 6 for the inner drawer 305 and the two ejection devices 6 for the drawer 303 are each coupled to each other via synchronization means 414, which are designed as rotatable rods and ensure that when a locking device of one ejection device 6 is unlocked, the locking device of the other ejection device 6 is also unlocked.

[0058] On the outer side of the guide rail 311 of the drawer slide 308 for the drawer 303, an activator 416 in the form of a projection is provided, which, when a predetermined opening position of the drawer 303 is reached, acts on a pivotable lever 417 and pivots it. The lever 417 is rotatably mounted on a housing 418, which is fixed to a side wall of the furniture carcass 302.

[0059] A vertical rod 419, coupled to the lever 417, is rotated by the lever 417. The vertical rod 419 is connected to a horizontal rod 425 via a first deflection device 420. The deflection device 420 comprises a cup-shaped housing on which a first bearing 421 for the vertical rod 419 and a second bearing 422 for the horizontal rod 425 are formed. Teeth 423 are formed on one end of the vertical rod 419 and teeth 424 are formed on one end of the horizontal rod 425, which mesh with each other, so that rotating the vertical rod 419 also rotates the horizontal rod 425.

[0060] The horizontal rod 425 is coupled to an actuating shaft 429 via a further deflection device 426. The deflection device 426 also comprises a cup-shaped housing on which bearings 427 and 428 are provided for the rod 425 and the actuating shaft 429. In the region of the deflection device 426, the horizontal rod 425 has teeth 435 at its ends, which engage with teeth 431 of the actuating shaft 429. The actuating shaft 429 is coupled via two gears 432 and 434 to a release shaft 433, which in turn is rotationally fixed to the synchronizing means 414. The release shaft 433, via at least one radially projecting projection, can unlock a locking device of the ejector 6, in order to move the pre-tensioned drive element along a guide in the opening direction.The drive element 413 can be coupled to a coupling element on the inner drawer 305 or on the guide rail of the drawer slide 308 for the inner drawer 305 in the ejection area, and decoupling occurs at a distance from the ejection area. To charge a power storage device of the ejection device 6, the driver 313 is moved in the closing direction via the support element, whereby the charging of the power storage device is arranged offset from the ejection path by the ejection device 6, i.e., at a distance from the closed position. This allows the power storage device to be charged and locked in place by moving the driver 313 in the closing direction before a self-closing mechanism 440 on the drawer slide 308 pulls the inner drawer 305 in the closing direction and holds it in a closed position. The self-closing mechanism 440 can also have a damper to decelerate the closing movement of the inner drawer 305.

[0061] The inner drawer 305 can be opened by opening the drawer 303, which can be moved in the opening direction either via an ejector 6 or via a handle. Regardless of how the drawer 303 is moved in the opening direction, an opening movement of the drawer 303 can unlock one or both ejector devices 6 for the inner drawer 305. The activator 416 pivots the levers 417 of the actuating means, causing a rotary movement of the vertical rods 419, the horizontal rods 415, the actuating shafts 429, and thus also the unlocking shaft 433. This gear train unlocks the locking mechanism of the two ejector devices 6, which are additionally synchronized via the synchronizing means 414 to eject the inner drawer 305 when the drawer 303 reaches a predetermined position.For ejection, the two drivers 313 of the ejection device 6 move in the opening direction.

[0062] The position at which the activator 416 acts on the actuating means for ejecting the inner drawer 305 can preferably be arranged in an opening area where the drawer 303 has traveled at least 50% of the maximum distance to the maximum opening position, preferably at least 70%.

[0063] In the Fig. 29, Fig. 30 to Fig. Figure 31 shows a further embodiment of an ejection device 6, wherein in Fig. 29 Two mutually connectable ejection devices 6 are shown, which have a housing 10 on which a bearing receptacle 95 is provided with a rotatable shaft 90, which projects on opposite sides with a section 94' and 96. In addition to the in Fig. In the embodiment shown in Figure 19, each ejection device 6 on the housing 10 comprises a housing part 97 through which the shaft 90 extends. It is also possible for the housing 10 and the housing part 97 to be designed as a single housing. Several receptacles 98 are formed on a top surface of the housing part 97, with a rotatable coupling element 99 having a section 100 projecting from the housing part 97 being formed in one of the receptacles 98. Otherwise, the ejection device 6 is connected to the driver 12 and the guide 11 as described above. Fig. 19 described trained.

[0064] In Fig. 30 is at the ejection device of the Fig.29 The housing part 97 has been omitted, and it can be seen that a sliding actuating element 130 is provided in the housing part 97. This actuating element is rod-shaped and coupled to a radially projecting projection 91 on the shaft 90. When the shaft 90 is rotated, the strip-shaped actuating element 130 is moved over the radially projecting projection 91. For this purpose, the projection 91 engages in a corresponding receptacle 131 on the actuating element by being arranged in a positive-locking manner.

[0065] The actuating element 130 has several receptacles 132 distributed along its length, arranged adjacent to the receptacles 98 of the housing part 97. Each receptacle 132 can be connected to a coupling element 99. In the illustrated embodiment, only the receptacle 132 opposite the shaft 90 is connected to a coupling element 99 on the receptacle 98, the coupling element 99 having a radially projecting projection 133 that engages in the receptacle 132 of the actuating element 130. By rotating the shaft 90, one or more coupling elements 99 can thus be rotated, and each coupling element can be connected to a further ejector device 6 or to another functional part. In another case, the coupling element 99 is rotated by an event and can thus rotate one or more coupling elements 99 and / or the shaft 90 by means of the actuating element 130.Depending on the application, the number of coupling elements can be selected to be 99, whereby more coupling elements can be provided instead of one to four. Reference symbol list 1 piece of furniture 2 furniture carcass 3 drawers 4 Front panel 5 Extraction guide 6 Ejection device 9 mounting brackets 10 cases 11 Leadership 12 drivers 14 lids 16 Guide rail 17 Guide rail 18 Guide rail 19 Rack and pinion 20 recordings 21 bracket 22 spring Part 23 25 Rastvorsprung 26 Actuator mounting 27 Final section 30 sleds 31 Spring mount 32 Spring holder 33rd entry 34 Curve guidance 35 Rastvorsprung 36 gear 37th entry 38 side wall 40 Control element 41 pen 42 pens 43 Bridge 44 Sliding element 45° approach slope 50 Actuator Part 51 52 warehouses 53 Bridge 54 Rastnase Section 55 56 Bridge 57 Approach ramp 58 recording 60 switching element 61 recess 62 printed piece 63 Arm 64 Bow spring 65 rotary dampers 66 Bridge 67 outriggers 68 spring 69 Spring mount 70 control rocker 71 Axis of rotation 72 booms 73 guide cams 74 Bearing intake 75 Cam guide 80 bars Section 81 Section 82 83 aperture 84 bar 85 opening 86 Coupling element 86' Section 87 Turned part 88 lead 90 wave 91 lead 92 Actuation section 93 lead 94, 94' section 95 Bearing capacity Section 96 97 Housing part 98 recording 99 Coupling element Section 100 101 pieces of furniture 102 Furniture carcass 103 Side wall 104 Partition wall 105 drawers 106 drawers 107 Front panel 110 Extraction guide 111 Guide rail 112 Center rail 113 Running rail 115 Connecting rod 116 bars 117 drivers 118 Activator 121 Actuating rod 122 Final section 123 Connecting section 124 levers 125 recording 126 lead 127th entry 128 Opening 130 Actuating element 131 recording 132 recording 133 lead 201 pieces of furniture 202 Furniture carcass 203 drawers 204 Front panel 205 Extraction guide 206 Running rail 207 Mounting brackets 208 cases 209 carriers 210 Synchronization equipment 211 Actuating shaft 212 wave 213 Deflection element 214 wave 215 Storage 216 pestles 217 Cover 218 Rack section 250 holders 290 spring 301 pieces of furniture 302 Furniture carcass 303 drawers 304 Front panel 305 Inner drawer 306 Front panel 307 Mounting brackets 308 Extraction guide 309 Guide rail 310 Center rail 311 Running rail 313 drivers 314 bars 315 Ejection device 317 poles 319 wave 320 Deflection device 321 bar 380 holders 413 Drive element 414 Synchronization equipment 415 bar 416 Activator 417 levers 418 Housings 419 bars 420 Deflection device 421 warehouses 422 warehouses 423 tooth 424 teeth 425 bar 426 Deflection device 427 warehouses 428 storage 429 Actuating shaft 431 tooth 432 gear 433 Release shaft 434 gear 435 teeth 440 Self-collection

Claims

Drive device for a movable furniture part (3, 105, 106, 203, 303, 305), comprising a latchable ejection device (6) by means of which the movable furniture part (3, 105, 106, 203, 303, 305) can be ejected from a closed position in the opening direction by means of a linearly movable driver (12, 117, 209, 313) pre-tensioned by a power storage device (22), and a locking device by means of which the driver (12, 117, 209, 313) can be locked when the power storage device (22) is tensioned, wherein an actuating element (50) is movable by the driver (12, 117, 209, 313) for unlocking the locking device, wherein the actuating element (50) is for unlocking the The locking device is movable by an actuating element provided on the ejection device (6), wherein at least two spaced-apart connections (81, 86, 86', 94) are provided on the ejection device (6), wherein at least one connection (81, 86, 86',94) is provided for coupling with the actuating element by means of which the locking device can be unlocked, characterized in that the actuating element comprises a rotatable shaft (90) which is mounted on a housing (10) of the ejection device (6) and the rotatable shaft (90) projects from opposite sides of the housing (10) and forms connections for an actuating mechanism. Drive device according to claim 1, characterized in that two connections (81, 86', 94) are provided for coupling with the actuating element (90), by means of which the locking device can be unlocked. Drive device according to claim 1 or 2, characterized in that at least one radially projecting projection (91) is provided on the rotatable shaft (90) which engages with the actuating element (50). Drive device according to one of the preceding claims, characterized in that the locking device comprises an actuating element (50) which is slidably, rotatably or pivotably mounted. Drive device according to claim 4, characterized in that the actuating element (50) is pre-tensioned to a starting position by a spring (68). Drive device according to one of claims 1 to 5, characterized in that an actuating element (130) coupled to the shaft (90) is slidably mounted on a housing part (10, 97). Drive device according to claim 6, characterized in that receptacles (98) for inserting a coupling element (99) can be inserted at different positions of the housing part (10, 97), which can then be actuated via the shaft (90) or the shaft (90) can be actuated by means of a coupling element (99). Drive device according to one of the preceding claims, characterized in that the ejection device (6) has a control element (40) which is guided in a guide track (17) of the ejection device (6), wherein the movable actuating element (50) and the guide track (17) form a locking area in which a pin (41) of the control element (40) can be placed. Drive device according to one of the preceding claims, characterized in that the ejection device (6) has a slide (30) pre-tensioned by the energy storage device (22), on which a control element (40) is arranged, which is coupled on one side to the driver (12, 117, 209, 313) via a track (16) of a curve guide and on the other side to a guide track (17) of the ejection device (6). Drive device according to one of the preceding claims, characterized in that at least two spaced-apart ejection devices (6) are provided with a power storage device (22) and a driver (12, 117, 209, 313), the locking devices of which are connected to each other via synchronization means (80, 115, 210, 317, 414). Drive device according to claim 10, characterized in that the synchronization means comprise a rotatable or displaceable rod (80, 115, 210, 317, 414) which couples two actuating elements together. Drive device according to claim 11, characterized in that the rod (80) is arranged spaced apart from an axis of the actuating elements (90) and a transmission mechanism (84, 86, 88) is provided on both ejection devices (6) to transmit a movement of the actuating elements (90) into a rotary movement of the rod (80). Drive device according to claim 10, characterized in that at least one first ejection device (6) is assigned to a first movable furniture part (303), and a second ejection device (6) is assigned to a second movable furniture part (305). Drive device according to claim 1, characterized in that a connection (86') is provided which is actuated by a movable functional part (70, 12, 30, 40) of the ejection device (6). Drive device according to claim 14, characterized in that the connection (86') is switched with a time delay after the ejection device (6) has been triggered. Drive device according to claim 1, characterized in that a connection (81, 86, 86', 94) can be actuated by a mechanical sensor (216) for detecting a position of a movable furniture part (203). Drive device according to claim 10, characterized in that the synchronization means comprises a cable system that couples two actuating elements together. Drive device according to one of the preceding claims, characterized in that a retraction device is provided which can be coupled to the movable furniture part in a closing area in order to pull the movable furniture part (3, 105, 106, 203, 303, 305) into the closing position in the closing direction in the closing area, wherein the energy storage device (22) of the ejection device (6) can be charged in a clamping area which is arranged substantially in front of the closing area in the closing direction.

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