Drive mechanism for a movable furniture part

Patent metadata

Field	Value
Publication number	US-10143303-B2
Application number	US-201615380368-A
Country	US
Kind code	B2
Filing date	Dec 15, 2016
Priority date	Jun 16, 2014
Publication date	Dec 4, 2018
Grant date	Dec 4, 2018

Abstract

A drive mechanism for a movable furniture part, in particular a drawer, has a first and a second lockable pushing-out mechanism and a synchronizing mechanism for synchronizing the two pushing-out mechanisms. The synchronizing mechanism has a synchronizing rod and a first and a second synchronizing element which can be connected to the synchronizing rod, and relative movement takes place between the synchronizing elements and the pushing-out mechanisms during synchronizing operation. In an active synchronizing mode, during synchronizing operation, movement is transmitted from the first pushing-out mechanism, via the first synchronizing element, the synchronizing rod and the second synchronizing element, to the second pushing-out mechanism. In an inactive synchronizing mode, the synchronizing rod is removed and the synchronizing elements each remain in contact with one of the pushing-out mechanisms.

First claim

The invention claimed is:

1. A drive device for a movable furniture part, comprising:
a first lockable ejection device and a second lockable ejection device, each of the first and second ejection devices comprising a housing;
a synchronizing device for synchronizing the first and second ejection devices; and
a first bearing element fixed to the housing of the first ejection device, and a second bearing element fixed to the housing of the second ejection device, each of the first bearing element and the second bearing element comprising a rotary bearing part;
wherein the synchronizing device includes:
a synchronizing rod;
a first synchronizing element; and
a second synchronizing element, each of the first synchronizing element and the second synchronizing element being rotatably supported by a respective one of the first bearing element and the second bearing element such that an axial side of each of the first synchronizing element and the second synchronizing element closest to the synchronizing rod contacts the rotary bearing part of a respective one of the first bearing element and the second bearing element so as to be non-detachably fixed to a respective one of the first ejection device and the second ejection device, being detachably connected to the synchronizing rod, and being configured such that a relative movement takes place between the first and second synchronizing elements and the first and second ejection devices during a synchronizing operation; and

wherein the first and second ejection devices and the synchronizing device are configured such that:
in an active synchronizing mode during the synchronizing operation, a movement transmission takes place from the first ejection device to the second ejection device via the first synchronizing element, the synchronizing rod, and the second synchronizing element; and
in an inactive synchronizing mode, the synchronizing rod is detached from each of the first and second synchronizing elements, and each of the first and second synchronizing elements remains fixed to and in contact with the respective one of the first and second ejection devices.

2. The drive device according to claim 1 , wherein each of the first and second ejection devices further comprises a transmission element supported movably on the housing, each of the first and second synchronizing elements being movably coupled with a respective one of the transmission elements.

3. The drive device according to claim 2 , wherein each of the first and second synchronizing elements comprises a gear wheel, and each of the transmission elements comprises a section in the shape of a gear rack, each of the gear wheels meshing with a respective one of the sections in the shape of a gear rack.

4. The drive device according to claim 2 , wherein each of the first and second ejection devices comprises a force-actuated ejection element for ejecting the movable furniture part from a closed position into an open position, and a locking device for locking the ejection element in a locking position, the locking device configured to be unlocked by over-pressing the movable furniture part into an over-pressing position lying behind the closing position.

5. The drive device according to claim 4 , wherein the locking device comprises a locking peg and a sliding guide track formed in the housing.

6. The drive device according to claim 5 , wherein each of the transmission elements forms a part of each sliding guide track.

7. The drive device according to claim 1 , wherein each end section of the synchronizing rod has a non-circular cross section, and each of the first and second synchronizing elements comprises a receiving portion which at least section-wise matches with an outer contour of a respective end section of the synchronizing rod.

8. The drive device according to claim 7 , wherein the synchronizing rod comprises a rod-shaped base part and two plug in parts mountable to ends of the base part and forming the end sections.

9. The drive device according to claim 1 , wherein the synchronizing rod has a constant and unchangeable length.

10. The drive device according to claim 1 , wherein only a part section of movements of the first and second ejection devices are synchronizable by the synchronizing device.

11. An item of furniture comprising:
a furniture carcass,
a furniture part movably supported on the furniture carcass, and
the drive device according to claim 1 .

12. The drive device according to claim 2 , wherein the transmission element is supported rotatably on the housing.

13. The drive device according to claim 5 , wherein the sliding guide track formed in the housing is heart curve-shaped.

14. The drive device according to claim 6 , wherein each transmission element forms a latch recess of each sliding guide track.

15. The drive device according to claim 1 , wherein each of the first and second synchronizing elements is supported in a rotating configuration and axially fixed on the housing via the bearing element.

16. The drive device according to claim 8 , wherein the rod-shaped base part has a hollow profile with a uniform inner diameter along an entire length thereof.

17. The drive device according to claim 10 , wherein the part section is a first section of an opening movement of the movable furniture part which section directly follows to an over-pressing position.

18. The item of furniture of claim 11 , wherein the furniture part is movably supported on the furniture carcass via an extension guide.

19. A drive device for a movable furniture part, comprising:
a first lockable ejection device and a second lockable ejection device, each of the first and second ejection devices comprising a housing;
a first bearing element fixed to the housing of the first ejection device, and a second bearing element fixed to the housing of the second ejection device, each of the first bearing element and the second bearing element comprising a rotary bearing part; and
a synchronizing device for synchronizing the first and second ejection devices, the synchronizing device including:
a synchronizing rod;
a first synchronizing element having a gear wheel; and
a second synchronizing element having a gear wheel, each of the first synchronizing element and the second synchronizing element being arranged such that a respective gear wheel is located within an opening of the rotary bearing part of a respective one of the first bearing element and the second bearing element so as to be surrounded by the rotary bearing part so that each of the first synchronizing element and the second synchronizing element is thereby non-detachably fixed to a respective one of the first ejection device and the second ejection device, being detachably connected to the synchronizing rod, and being configured such that a relative movement takes place between the first and second synchronizing elements and the first and second ejection devices during a synchronizing operation;

wherein the first and second ejection devices and the synchronizing device are configured such that:
in an active synchronizing mode during the synchronizing operation, a movement transmission takes place from the first ejection device to the second ejection device via the first synchronizing element, the synchronizing rod, and the second synchronizing element; and
in an inactive synchronizing mode, the synchronizing rod is detached from each of the first and second synchronizing elements, and each of the first and second synchronizing elements remains fixed to and in contact with

Assignees

• Blum Gmbh Julius

Inventors

• Koenig Bernd
• Meusburger Marc

Classifications

• A47B2210/0078

  Drawers with parallel guidance or synchronization by pinion-shaft linkages · CPC title

• A47B88/483

  with single extensible guides or parts · CPC title

• A47B2210/0083

  Drawer symmetric movement on opposite telescopic rails · CPC title

• E05Y2201/62

  Synchronisation of suspension or transmission members · CPC title

• A47B88/467

  self-closing · CPC title