Device for opening and closing a movable furniture part

1. A device for opening and closing a movable furniture part that is a drawer, the device comprising:

a push-out unit; and

a guideway,

wherein the push-out unit includes a coupler, at least one push-out element, and a rechargeable energy storage element connected to the at least one push-out element via the coupler, such that when the movable furniture part is pushed a specified or definable distance, energy stored in the energy storage element becomes available as kinetic energy in order to eject the movable furniture part,

wherein the coupler is configured as a lever system comprising a plurality of levers each having opposed ends, the opposed ends of each lever being pivotably connected in an articulated manner via multiple hinges,

wherein the multiple hinges include a base hinge, a first hinge, a second hinge, and a third hinge,

wherein the plurality of levers includes a base lever pivotable about the base hinge to which the energy storage element is linked via the first hinge and the at least one push-out element via the second hinge,

wherein the push-out unit further includes a locking mechanism that holds the at least one push-out element in a locked position and that is releasable when the movable furniture part is pushed in the specified or definable distance to initiate ejection,

wherein the locking mechanism is connected to the at least one push-out element and the energy storage element via the lever system,

wherein the locking mechanism includes at least one locking element that is controllable by the guideway such that, when the movable furniture part is pushed in the specified or definable distance, the at least one locking element releases the at least one push-out element via forcible control exerted by the guideway,

wherein the at least one locking element is configured as a locking catch pivotably mounted about an axis of rotation, and the guideway provides forcible control of the locking catch, and

wherein the locking catch is linked to the base lever via the third hinge.

2. The device according to claim 1 , wherein the lever system is configured as a four or seven hinge mechanism which includes the base hinge, the first hinge, the second hinge, and the third hinge.

3. The device according to claim 1 , wherein the distance between the base hinge and the first hinge is shorter than the distance between the base hinge and the second hinge.

4. The device according to claim 1 , wherein the distance between the base hinge and the third hinge is greater than the distance between the base hinge and the second hinge.

5. The device according to claim 1 ,

wherein the plurality of levers further includes a first connecting lever and the multiple hinges further include a fourth hinge,

wherein the at least one push-out element is linked to the base lever in an articulated manner via the first connecting lever, and

wherein the first connecting lever is linked to the base lever in an articulated manner via the second hinge, and to the at least one push-out element in an articulated manner via the fourth hinge.

6. The device according to claim 5 ,

wherein the plurality of levers further includes a second connecting lever and the multiple hinges further include a fifth hinge,

wherein the locking catch is arranged on the base lever in an articulated manner via the second connecting lever, and

wherein the second connecting lever is connected to the base lever in an articulated manner via the third hinge, and to the locking catch in an articulated manner via the fifth hinge.

7. The device according to claim 1 , wherein the energy storage element is configured as a spring-type cylinder provided with at least one tension spring.

8. The device according to claim 7 , wherein the at least one tension spring is arranged on a spring bracket between first and second supporting elements arranged movably relative to each other, wherein the first supporting element is arranged on the base lever in an articulated manner via the first hinge.

9. The device according to claim 7 , further comprising an actuation element to actuate the at least one push-out element such that the at least one push-out element is configured to be pushed via the lever system into releasing the at least one locking element and the stored energy released from the energy storage element is capable of ejecting the movable furniture part.

10. The device according to claim 9 , wherein the actuation element includes a cam element configured to be brought into contact with the at least one locking element when closing the movable furniture part, and the cam element moves into the locked position charging the energy storage element, tightening the at least one tension spring.

11. The device according to claim 1 , further comprising a mounting plate on which the energy storage element, the at least one push-out element, and the lever system are arranged.

12. A drawer comprising the device of claim 1 .