EP3138444A1 - Device for opening and closing a movable furniture part - Google Patents

Abstract

In a device for opening and closing a movable furniture part (12), in particular drawer, door or flap, with an ejection unit (14) having at least one ejection member (15) and one with the ejection member (15) coupled via coupling means such rechargeable energy storage in that energy stored as kinetic energy for ejecting the movable furniture part (12) can be set when the movable furniture part (12) is pressed in the energy store by a predetermined and predeterminable distance, the coupling means comprise a lever system (19) with several articulated joints connected levers.

Description

The invention relates to a device for opening and closing a movable furniture part, in particular drawer, door or flap, with an ejection unit, which has at least one ejection member and a coupled to the ejection member via coupling means such rechargeable energy storage, which when pressing the movable furniture part by a predetermined or specifiable distance stored in the energy storage energy is available as kinetic energy for ejecting the movable furniture part available.

Such a device is for example from the DE 20 2006 020 236 U1 known. The device described therein has an ejection unit, which in turn has a Ausschub element and a locking unit with at least one locking element. The push-out element is seated on the drawer rail and cooperates with a stop arranged on the carcass rail. The at least one locking element is screwed over an angle on the furniture body.

It is also known to equip movable furniture parts, such as drawers with a so-called automatic retraction, whereby the movable furniture part automatically and damped moves into the closed position.

For movable furniture parts, such as drawers, which are equipped with an ejection unit, the movable furniture part is pressed by a predetermined or predetermined distance and then ejected by previously stored in an energy storage kinetic energy. During the subsequent retraction of the movable furniture part of the energy storage is recharged.

The object of the invention is to provide a device of the type mentioned, with the comfort for the user for the ejection operation of the movable furniture part and the retraction movement associated with the recharging of the energy storage over conventional devices is significantly increased.

This object is achieved by a device having the features of independent claim 1. Further developments of the invention are shown in the subclaims.

The device according to the invention is characterized in that the coupling means comprise a lever system with a plurality of levers articulated to one another via joints.

The lever system used, it is possible to adjust the energy, in particular the forces to eject and recharge the energy storage and thereby adapt to the needs of the user. For example, it is possible to define the force that has to be exerted by the user during retraction of the movable furniture part for charging the energy storage device so that it is less than the force that it has to spend for the short discharge stroke. This is possible by choosing suitable lever lengths and lever arms around defined pivot points of the lever system. As a result, the comfort for the user can be increased significantly.

In a further development of the invention, the ejection unit has locking means which hold the ejection member in a locking position and which can be unlocked when the movable furniture part is pressed in by the predetermined or predefinable path to initiate ejection.

Particularly preferably, the locking means are coupled via the lever system with the ejection member and the energy storage. The lever system can thus transmit the actuating movement exerted on the ejection member both to the locking means and to the energy storage. By choosing suitable lever lengths of the levers of the lever system, the forces transmitted to the locking means and the energy storage can be varied.

In a development of the invention, the locking means comprise at least one locking element which can be controlled by control means in such a way that it unlocks the ejection member when the movable furniture part is pushed in by means of a forced guidance exerted by the control means.

Particularly preferably, the locking element is designed as a pivoting about a pivot axis mounted locking pawl. The control means may comprise a guideway for positively guiding the locking pawl.

Particularly preferably, the lever system is designed as a coupling mechanism, wherein preferably a four- or seven-joint transmission is provided. Four- or seven-jointed transmission form statically certain kinematic chains with a degree of freedom, whereby a movement initiated on the kinematic chain inevitably leads to the movement of all joints or gear members.

In a development of the invention, the lever system has a base lever pivotable about a base joint pivoting when clamping or ejecting the ejection member, to which the energy store is articulated via a first joint and the ejection member is articulated via a second joint. The pivotable base lever may be formed, for example, in the manner of a rocker. Conveniently, the levers of the lever system, ie also the base lever, are levers made of flat material, for example of metal material.

Conveniently, the locking element is articulated via a third joint to the base lever.

Particularly preferably, the distance between the base joint and the first joint is smaller than the distance between the base joint and the second joint.

In a further development of the invention, the distance between the base joint and the third joint is greater than the distance between the base joint and the second joint.

It is possible that the ejection member is articulated via a first connecting lever articulated on the base lever, wherein the first connecting lever is pivotally articulated on the one hand via the second joint on the base lever and a fourth joint articulated on the ejection member.

Furthermore, it is possible for the locking element, in particular the locking pawl, to be articulated on the base lever via a second connecting lever, wherein the second connecting lever is pivotally articulated on the base lever via the third joint and articulated on the ejection element via a fifth joint.

In a particularly preferred manner, the energy store is designed as a spring store equipped with at least one spring. Conveniently, the spring accumulator is designed as a spring assembly with several springs connected in parallel. Such a spring accumulator has the advantage that it is inexpensive and easy to maintain. Furthermore, the ejection force which acts on ejecting the movable furniture part can be varied by selecting different spring stiffnesses of the springs. The at least one spring of the spring accumulator may be formed, for example, as a tension spring, which can be stretched when retracting the movable furniture part via an actuating movement of the locking element and its coupling via the lever system.

In principle, however, other types of energy storage would be used. For example, it would be conceivable to convert the kinematic energy present when retracting the movable furniture part into electrical energy and to store it as such, wherein the electrical energy could then be converted back into the kinetic energy during the ejection process.

In a further development of the invention, the at least one spring is arranged on a spring carrier and is clamped there between a first and a second carrier parts arranged relative to one another relative to one another. Conveniently, the first carrier part is arranged articulated on the base joint via the first joint.

In one embodiment of the invention, an actuating member for actuating the ejection member is provided, such that a depression of the ejection member via the lever system in an unlocking of the locking element and on the from the Energy stored energy stored energy is expedient to eject the movable furniture part.

Particularly preferably, the actuating member has a driver element which can be brought into contact with the locking element when the movable furniture part is closed, and which, upon charging of the energy store, preferably transfers the at least one spring into the locking position.

It is possible that a mounting plate is provided on which the energy store, the ejection member, the lever system and optionally the locking element are arranged. Such a mounting plate provides a preassembled module that can be easily mounted without the individual components must be mounted separately in any confined spaces.

In a further development of the invention, a damping device for damping the retraction movement of the movable furniture part is provided in the closed position.

The invention further relates to a furniture part, in particular a drawer, characterized by a device according to one of claims 1 to 18.

Furthermore, the invention comprises a piece of furniture, with a guide device for guiding a movable furniture part and at least one movable furniture part, characterized by a device according to one of claims 1 to 18.

It is possible that the mounting plate on the guide device or on the movable furniture part, such as drawer, and corresponding thereto, the actuating member on the movable Furniture part or are mounted on the guide device.

Figur 1

eine Draufsicht auf ein bevorzugtes Ausführungsbeispiel der erfindungsgemäßen Vorrichtung zum Öffnen und Schließen eines bewegbaren Möbelteils, wobei sich das Möbelteil in der Schließstellung befindet,

Figur 2

eine Draufsicht auf die Vorrichtung von Figur 1, nach dem Ausstoßen des bewegbaren Möbelteils aus der Schließstellung,

Figur 3

eine Draufsicht auf die Vorrichtung von Figur 1, wobei das bewegbare Möbelteil noch weiter ausgefahren ist,

Figur 4

eine Draufsicht auf die Vorrichtung von Figur 1, bei der das Betätigungsorgan und die Montageplatte mit den verschiedenen Komponenten entkoppelt sind und das bewegbare Möbelteil frei bewegbar ist,

Figur 5

eine Draufsicht auf die Vorrichtung von Figur 1 beim Einfahren des bewegbaren Möbelteils, wobei das Verriegelungselement in Kontakt mit dem Betätigungsorgan kommt und

Figur 6

eine Draufsicht auf die Vorrichtung von Figur 1, bei dem das bewegbare Möbelteil noch weiter eingefahren ist, wobei der Federspeicher gespannt wird.

A preferred embodiment of the invention is illustrated in the drawing and will be explained in more detail below. In the drawing show:

FIG. 1

a plan view of a preferred embodiment of the device according to the invention for opening and closing a movable furniture part, wherein the furniture part is in the closed position,

FIG. 2

a plan view of the device of FIG. 1 after the ejection of the movable furniture part from the closed position,

FIG. 3

a plan view of the device of FIG. 1 , wherein the movable furniture part is extended even further,

FIG. 4

a plan view of the device of FIG. 1 in which the actuating member and the mounting plate are decoupled with the various components and the movable furniture part is freely movable,

FIG. 5

a plan view of the device of FIG. 1 when retracting the movable furniture part, wherein the locking element comes into contact with the actuating member and

FIG. 6

a plan view of the device of FIG. 1 in which the movable furniture part is retracted even further, wherein the spring accumulator is tensioned.

The FIGS. 1 to 6 show a preferred embodiment of the device 11 according to the invention for opening and closing a movable furniture part 12 (FIG. Fig.2 ). The device 11 is shown and described here by way of example when using a movable furniture part 12 designed as a drawer. It is of course possible to use the device 11 also on other movable furniture parts 12, for example on a door or on a flap.

The drawer (not shown) by means of a guide device relative to a furniture body (not shown) slidably mounted. The guide device comprises a plurality of guide units (not shown), which are arranged on mutually opposite side edges of the drawer. The guide units each have a carcass rail 13 (FIG. Fig.2 ), which may be configured for example as a bent sheet-metal component. The carcass rail 13 is fixed in a fixed position via suitable fastening means on an associated side wall of a drawer receiver formed in the furniture body. On the carcass rail 13, a middle rail (not shown) is displaceably mounted on which in turn a pull-out rail (not shown) is guided displaceably by means of bearing means. The pull-out rail, which can also be referred to as a movement or running rail, is assigned to the drawer and extends below the drawer bottom in the depth direction. The combination of carcase rail 13, middle rail and pull-out rail is called full extension. However, it is also conceivable to use guide units without middle rail.

The apparatus further comprises an ejection unit 14, which has at least one ejection element 15, by means of which the drawer can be pressed in and pushed out by a predefined or predefinable path.

The ejection member 15 is associated with a rechargeable energy storage in the form of a spring 16, which is coupled to the ejector 15 such that stored energy is provided as kinetic energy for ejecting the drawer when pushing the drawer to the predetermined or predeterminable distance in the energy storage ,

In addition to the ejection member 15, the ejection unit 14 as a further main component on locking means which hold the ejection member 15 in a locking position 17 and which can be unlocked when pushing the movable furniture part by the predetermined distance to initiate the ejection.

As in particular in FIG. 1 3, the three main components of the ejection unit 14, the ejection member 15, the spring 16 and the locking means are mounted together on a mounting plate 18, which in turn is mounted on the drawer according to preferred embodiment.

As also in particular in FIG. 1 shown, the three main components of the ejection unit 14, the ejection member 15, the spring 16 and the locking means are connected to each other via the coupling means. The coupling means are designed as a lever system 19 which comprises a plurality of hingedly articulated levers.

The lever system 19 comprises a as a flat lever, ie, made of flat material, for example made of steel material, in particular sheet metal, existing base lever 20 which is pivotally mounted about a relative to the mounting plate 18 fixed base joint 21. The base hinge 21 is located in the region of one of the longitudinal sides 22a, 22b of the mounting plate. The base lever 20 is functionally designed as a rocker and has more Joints for coupling the aforementioned three main components of the ejection unit 14.

It is first to call a first joint 23 at a short distance from the base joint 21, on which the spring accumulator 16 is articulated.

The spring accumulator 16 in turn has a spring carrier 24, which in turn has two relatively movable support members 25a, 25b, between which at least one spring 26, in the example, a plurality of parallel springs 26 are clamped. The springs 26 are designed as tension springs, which are stretched away from each other during the movement of the support members 25a, 25b. The first carrier part 25a is articulated to the base lever 20 via the first joint 23. By contrast, the second carrier part 25b is articulated to the mounting plate 18 via a further base joint 27, which is also stationary relative to the mounting plate 18.

At the base lever 20 is a second joint 28 whose distance from the base joint 21 is greater than the distance between the first joint 23 and the base joint 21. At the second joint 28, the ejection member 15 is articulated.

Finally, a third joint 29 is provided on the base lever 20, which is arranged on the other, ie at the end equipped with the base joint 21 opposite end of the base lever 20. The distance between the base joint 21 and the third joint 29 is thus greater than the distance of the first joint 23 to the base joint 21 and also greater than the distance of the second joint 28 to the base joint 21. Thus, between the third joint 29 and the base joint 21 a relatively large, the total length of the base lever 20 exploiting lever arm created.

Coming back to the ejector 15, this is how, in particular in FIG. 1 shown connected via a connecting lever 30 with the base lever 20. The connecting lever 30, which is also designed as a flat lever, is pivotally connected via the second joint 28 on the base lever 20 and connected via a fourth joint 31 with the ejection member 15. The ejection member 15 is formed as a plunger, which is guided in a linearly movable in a longitudinal direction of the furniture plate 18 in the furniture plate 18 guide slot 32. The plunger-like ejection member 15 is therefore between the in FIG. 1 shown locking position 17 and a in FIG. 3 shown ejection position 33 guided linearly movable.

As in particular also in FIG. 1 Shown, the locking means on a locking element in the form of a locking pawl 34. The locking pawl 34 is connected via a further connecting lever 35 to the base lever 20. The further connecting lever 35 is expediently designed as a flat lever. The further connecting lever 35 is mounted on the one hand to the third joint 29 articulated on the base lever 20 and on the other hand articulated via a fifth joint 36 on the locking pawl 34. The locking pawl 34 are associated with control means, which in the example, a guide track 37 for positively guiding the locking pawl 34 have. As in particular in FIG. 2 shown, the guide rail 37, which is expediently designed as a guide slot in the furniture panel 18, extending in the longitudinal direction of the furniture plate 18. The locking pawl 34 has on its underside a guide pin (not shown), which dips into the guide track 37 and is forcibly guided there. The locking pawl 34 further has a nose-like projection 38 which projects beyond the longitudinal edge of the furniture panel 18. The slide-like guideway 37 has a substantially parallel to the Longitudinal edge of the furniture panel 18 extending guide portion 39, connect to the end of each functional areas. One of these functional areas is formed as a locking groove 40 which extends obliquely to the guide portion 39 of the guide track 37, in the direction of the longitudinal edge of the furniture panel 18 rising. In the locking position 17 of the locking pawl 34, the guide pin is positioned at the lowest point of the locking groove 40.

The device 11 further comprises an actuating member 41, which is fixed to the carcass rail 13 in the example. The actuator 41 has in longitudinal section an L-like configuration, with a short transverse leg 42 which is associated with the ejection member 15 and in the closed position of the drawer is in contact with a loading portion of the ejection member 15. Further, a longitudinal leg 43 extending substantially parallel to the longitudinal edge of the furniture panel 18 is provided, which has at its free end a driver element 44 which cooperates with the projection 38 on the locking pawl 34 in the following manner.

As in particular in FIG. 1 shown, the drawer and attached furniture plate 18 with the ejection unit 14 are initially in the closed position. In this case, the transverse leg 42 of the actuating member 41 in abutment with an actuating portion of the ejection member 15. The user now pushes the drawer in the closed position a predetermined and preset distance to the inside. In this case, the distance between the transverse side of the furniture panel 18 and the transverse leg 42 of the actuating member 41 is reduced and the plunger-like ejection member 15 is further retracted into the guide slot 32. This actuating movement is via the fourth joint and the connecting lever 30 and the third Joint 29 transmitted to the base lever 20 which is pivoted counterclockwise about the base joint 21. In the locking position 17, the tension springs are tensioned and the locking pawl 34 is located with its driving pin in the locking groove 40. Now, if the base lever 20 is pivoted counterclockwise about the base joint 21, so is the third joint 29, which is also on the base lever 20 is located, with pivoted. Via the coupling of the base lever 20 via the further connecting lever 35 with the locking pawl 34, this results in that the driving pin located in the locking position is forcibly displaced outwardly in the locking groove 40, as a result of which the locking is released.

After the lock is released, the tension springs take effect whose spring force endeavors to shorten the distance between the two carrier parts 25a, 25b relative to one another. As a result, the spring force of the tension springs causes the base lever 20 to pivot in the clockwise direction about the base joint 21. In this case, the ejection member 15 is pushed out via the coupling by means of the connecting lever 30 from the guide slot 32, whereby the furniture plate 18 and the coupled drawer are pushed away from the actuator 41 and the drawer is ejected.

The locking pawl 34 is guided on the straight guide region 39. As in particular in FIG. 3 shown, the projection 38 of the locking pawl 34 is thereby moved past the stationary driver element 44. The driver element 44 presses the locking pawl 34 with the projection 38 to the side, in which the locking pawl 34 is pivoted in the clockwise direction about the fifth joint 36. A spring (not shown) ensures that the locking pawl 34 with the projection 38 after passing the Driver member 44 pivots back to its original position. When re-entering the projection 38 then hits again on the driver element 44, as described below. As in particular in FIG. 3 shown, the ejection member 15 is ejected until the tension springs are relaxed. The drawer can then be detached from the actuator 41 further extended.

The FIGS. 5 and 6 show the re-insertion of the drawer in the closed position. When the drawer is closed, the projection 38 on the locking pawl 34 comes into contact with the stationary driver element 44 on the actuating member 41, as a result of which the locking pawl 34 is moved linearly in the guide region 39 in the direction of its locking position 17. This retraction movement causes pivoting of the base lever 20 about the base joint 21 in the counterclockwise direction. The distance between the two carrier parts 25a, 25b of the spring accumulator 16 is increased and the tension springs are tensioned. Upon further retraction of the drawer, the driving pin of the locking pawl 34 snaps into the locking groove 40, wherein the locking pawl 34 is pivoted counterclockwise at the fifth hinge 36 so that the projection 38 comes out of contact with the driver 44, thereby projection 38 and Mitnehmerelemnt 44 together can pass. From a certain retracting position of the transverse leg 42 of the actuating member 41 comes back into contact with the actuating portion of the ejection member 15, whereby the in FIG. 1 shown position is reached. In this position, the tension springs of the spring accumulator 16 are tensioned, whereby their spring force is available again for the subsequent ejection operation.

It is characteristic that the distance between the first joint 23, on which the spring accumulator 16 to the base lever 20th is coupled to the base joint 21 is smaller than the distance between the second joint 28 to which the ejection member 15 is coupled to the base joint 21. The largest is the distance between the third joint 29 to which the locking pawl 34 is coupled and the The joint between the ejection member 15 and the base joint 21 is larger, so that translates the tensile force of the springs in a slightly smaller force for ejection becomes. However, a great advantage is the large lever arm between the third joint 29 and the base joint 21, whereby the tension springs can be tensioned when retracting due to the large lever arm with a relatively small force. The effort required for the user to tension the springs is thus minimized. Nevertheless, the extension springs provide a greater force during ejection, which is then released via the ejection member 15 and ensures the ejection of the drawer.

Claims (21)

Device for opening and closing a movable furniture part (12), in particular a drawer, door or flap, comprising an ejection unit (14) which has at least one ejection element (15) and a rechargeable energy store coupled to the ejection element (15) via coupling means when energy is stored as kinetic energy for ejecting the movable furniture part (12) when the movable furniture part (12) is stored for a predetermined and predeterminable distance in the energy store, characterized in that the coupling means articulates a lever system (19) with a plurality of joints include interconnected levers. Apparatus according to claim 1, characterized in that the ejection unit (14) has locking means which hold the ejection member (15) in a locking position (17) and by pressing the movable furniture part (12) by the predetermined or predeterminable distance for introducing the Ejecting are unlocked. Apparatus according to claim 2, characterized in that the locking means are coupled via the lever system (19) with the ejection member (15) and the energy storage. Apparatus according to claim 2 or 3, characterized in that the locking means comprise at least one locking element which is controllable via control means such that it when pressing the movable furniture part (12) unlocks the ejection member (15) via a forced operation exerted by the control means. Apparatus according to claim 4, characterized in that the locking element as a pivot axis about a pivotally mounted locking pawl (34) is formed and the control means comprises a guide track (37) for positively guiding the locking pawl (34). Device according to one of the preceding claims, characterized in that the lever system (19) is designed as a four- or seven-link transmission. Device according to one of the preceding claims, characterized in that the lever system (19) has a base lever (20) pivotable about a base joint (21), via which the energy store is connected via a first joint (23) and via a second joint (28) Ejector (15) is articulated. Apparatus according to claim 7, characterized in that the locking element via a third joint (29) is articulated to the base lever (20). Device according to one of claims 7 or 8, characterized in that the distance between the base joint (21) and the first joint (23) is smaller than the distance between the base joint (21) and the second joint (28). Device according to one of claims 8 or 9, characterized in that the distance between the base joint (21) and the third joint (29) is greater than the distance between the base joint (21) and the second joint (28). Device according to one of claims 7 to 10, characterized in that the ejection member (15) via a first connecting lever (30) articulated on the base lever (20) is articulated, wherein the first connecting lever (30) on the one hand via the second joint (28) articulated on the base lever (20) and articulated via a fourth joint (31) articulated on the ejection member (15). Device according to one of claims 7 to 11, characterized in that the locking element, in particular locking pawl (34) via a second connecting lever (35) is pivotally mounted on the base lever (20), wherein the second connecting lever (35) on the one hand via the third joint ( 29) articulated on the base lever (20) and articulated via a fifth joint (36) on the ejection member (15). Device according to one of the preceding claims, characterized in that the energy store as with at least one spring (26) equipped spring memory (16) is formed, wherein preferably a spring is provided as a spring (26). Apparatus according to claim 13, characterized in that at least one spring (26) is arranged on a spring carrier (24) and is clamped there between a first and a second relatively movably arranged carrier parts (25a, 25b), wherein preferably the first carrier part ( 25a) is articulated on the base lever (20) via the first joint (23). Device according to one of the preceding claims, characterized in that an actuating member (41) for actuating the ejection member (15) is provided, such that a depression of the ejection member (15) via the lever system (19) in an unlocking of the locking element and on the from the energy storage released stored kinetic energy to eject the movable furniture part (12) can be guided. Device according to one of the preceding claims, characterized in that the actuating member (41) has a driver element (44) which can be brought into contact with the locking element during closing of the movable furniture part (12) and this under charging of the energy storage, preferably clamping the at least a spring (26), in the locking position (17) transferred. Device according to one of the preceding claims, characterized in that a mounting plate (18) is provided, on which the energy store, the ejection member (15), the lever system (19) and optionally the locking element are arranged. Device according to one of the preceding claims, characterized by a damping device for damping the simple movement of the movable furniture part (12) in the closed position. Furniture part (12), in particular drawer, characterized by a device according to one of claims 1 to 18. Furniture, with a guide device for guiding a movable furniture part (12) in at least one movable Furniture part (12), characterized by a device (11) according to one of claims 1 to 18. Furniture according to claim 20, characterized in that the mounting plate (18) on the guide means or on the movable furniture part (12) and corresponding thereto, the actuating member (41) is mounted on the movable furniture part (12) or on the guide means.

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