US-12618276-B2 - Furniture fitting having an adjustment mechanism

Abstract

A furniture fitting having an adjustment mechanism for adjusting the preload of a spring element, wherein the adjustment mechanism includes a spring bearing and a preloading element, by means of which the spring bearing can be adjusted, wherein the adjustment of the spring bearing increases and/or decreases the preloading of the spring element. The transmission of impermissibly high operating forces is reliably avoided by providing a coupling body which is adjustable relative to the preloading element and which, during the adjustment of the spring bearing, at least partially and/or temporarily bears against the latter, in such a way that a releasable form-fitting and/or frictional connection is formed between the coupling body and the spring bearing, and/or in that a releasable form-fitting and/or frictional connection is formed between the coupling body and the preloading element.

Inventors

• Artur Hirtsiefer
• Nurettin Güzeltepe
• Izzet Yarar

Assignees

• Samet Kalip Ve Madeni Esya San Ve Tic. A.S.

Dates

Publication Date

20260505

Application Date

20211206

Claims (17)

1. 1 . A furniture fitting, comprising: a spring element; and an adjustment mechanism including: a spring bearing configured to support the spring element; a preloading element configured to adjust a position of the spring bearing to adjust a preloading of the spring element; a coupling body adjustable in position relative to the preloading element; the coupling body having a first releasable form-fitting and/or frictional connection with the spring bearing at least temporarily during adjustment of the position of the spring bearing, the first releasable form-fitting and/or frictional connection being releasable in a circumferential direction so that the coupling body may rotate relative to the spring bearing; and the coupling body having a second releasable form-fitting connection with the preloading element.
2. 2 . The furniture fitting of claim 1 , wherein: the preloading element includes an externally threaded section; and the coupling body includes an internally threaded receptacle; wherein the second releasable form-fitting connection between the coupling body and the preloading element is provided by the threaded section of the preloading element being threadedly engaged in the internally threaded receptacle of the coupling body, such that the position of the coupling body relative to the preloading element is adjustable by adjusting the threaded engagement between the preloading element and the coupling body.
3. 3 . The furniture fitting of claim 2 , wherein: the externally threaded section of the preloading element is adjoined by a non-threaded extension having a smaller outer perimeter than the externally threaded section.
4. 4 . The furniture fitting of claim 2 , wherein: the spring bearing includes a non-threaded receiving bore; and the preloading element is received through the receiving bore.
5. 5 . The furniture fitting of claim 1 , wherein: the coupling body includes one or more coupling elements; the spring bearing includes one or more counter-coupling elements at least partially corresponding to the coupling elements; and wherein the first releasable form-fitting and/or frictional connection between the coupling body and the spring bearing is formed by the one or more coupling elements being at least partially and/or temporarily in engagement with the one or more counter-coupling elements during the adjustment of the position of the spring bearing.
6. 6 . The furniture fitting of claim 5 , wherein: the one or more coupling elements are formed as one or more elevations and the one or more counter-coupling elements are formed as one or more recesses; or the one or more coupling elements are formed as one or more recesses and the one or more counter-coupling elements are formed as one or more elevations.
7. 7 . The furniture fitting of claim 5 , wherein: the one or more coupling elements includes a plurality of coupling elements extending radially and spaced apart from one another in a circumferential direction.
8. 8 . The furniture fitting of claim 1 , wherein: the spring bearing includes a base body and a cylindrical guide projection extending from the base body, the guide projection having a smaller outer perimeter than the base body.
9. 9 . The furniture fitting of claim 8 , wherein: the spring element is received on the guide projection of the spring bearing and is supported on the base body of the spring bearing.
10. 10 . The furniture fitting of claim 1 , wherein: the preloading element includes a head, the head including an engagement structure formed by protrusions and depressions, the engagement structure being configured to be engaged by a tool aligned with and perpendicular to a central longitudinal axis of the preloading element.
11. 11 . The furniture fitting of claim 1 , wherein: the coupling body includes a disc body and a centering projection extending from a side of the disc body facing the spring bearing, the centering projection having a smaller outer perimeter than the disc body; and the spring bearing includes on a side of the spring bearing facing the coupling body a centering receptacle configured to receive the centering projection.
12. 12 . The furniture fitting of claim 1 , further comprising: an arm section including a cylindrical receptacle; wherein the preloading element includes a head rotatably received in the cylindrical receptacle of the arm section; and wherein the arm section further includes a cylindrical tool opening configured to receive a tool such that the tool is supported in engagement with the head of the preloading element.
13. 13 . The furniture fitting of claim 1 , further comprising: an arm section; a control part; a thrust piece slidably received in the arm section and engaged with the control part; and wherein the spring element includes a first spring end supported on the spring bearing and a second spring end supported on the thrust piece such that the thrust piece at least partially transmits a preloading force of the spring element to the control part.
14. 14 . A furniture fitting, comprising: a spring element; and an adjustment mechanism including: a spring bearing configured to support the spring element; a preloading element configured to adjust a position of the spring bearing to adjust a preloading of the spring element; a coupling body adjustable in position relative to the preloading element; the coupling body having a first releasable form-fitting and/or frictional connection with the spring bearing at least temporarily during adjustment of the position of the spring bearing; and the coupling body having a second releasable form-fitting connection with the preloading element; wherein the spring bearing includes a base body and one or more projections extending from the base body and having one or more guide surfaces defined on the one or more projections, and/or the base body includes one or more spring bearing sliding surfaces defined on the base body.
15. 15 . The furniture fitting of claim 14 , further comprising: an arm section including one or more guide regions for guiding the one or more spring bearing sliding surfaces and/or one or more spring bearing counter surfaces for guiding the one or more guide surfaces.
16. 16 . A furniture fitting, comprising: a spring element; and an adjustment mechanism including: a spring bearing configured to support the spring element; a preloading element configured to adjust a position of the spring bearing to adjust a preloading of the spring element; a coupling body adjustable in position relative to the preloading element; the coupling body having a first releasable form-fitting and/or frictional connection with the spring bearing at least temporarily during adjustment of the position of the spring bearing; and the coupling body having a second releasable form-fitting connection with the preloading element; wherein the spring bearing includes a base body and one or more guide lugs extending from the base body.
17. 17 . The furniture fitting of claim 16 , further comprising: an arm section including one or more guide slots for guiding the one or more guide lugs.

Description

The invention relates to a furniture fitting having an adjustment mechanism for adjusting the preload of a spring element, wherein the adjustment mechanism comprises a spring bearing and a preloading element, by means of which the spring bearing can be adjusted, wherein the adjustment of the spring bearing increases and/or decreases the preloading of the spring element. Furniture fittings in which adjustment mechanisms may be used to adjust the preload of a spring element include actuators, control arms, hinges, flap supports, retraction and/or ejection devices, particularly for drawers, sliding doors or the like. From WO 2014/121309 A1 an actuator for moving a movable furniture part is known, wherein an adjustment mechanism is provided to adjust the preload of a spring device. The adjusting mechanism has an adjusting screw and a screw nut, which is adjustable along the thread of the adjusting screw and absorbs the force of the spring device. The preload of the spring device can be adjusted by adjusting the screw nut. It is further provided that the screw nut has a threadless section between its screw head and the thread. If the screw nut is adjusted with respect to the adjusting screw so far in the direction of the screw head that it reaches the threadless section, it is no longer adjusted by a further rotation of the adjusting screw and rotates freely. In order that the nut may re-engage with the thread when the adjusting screw is turned in the opposite direction, a spring element is provided which applies a force to the screw nut acting in the direction towards the thread. A similar actuator is also known from WO 2015/027251 A1. It is the task of the invention to provide a furniture fitting with an adjustment mechanism which, with a simple design, allows safe adjustment of the preload of a spring element and reliable prevention of the transmission of impermissibly high operating forces. The task is solved by providing a coupling body which is adjustable relative to the preloading element and which, during the adjustment of the spring bearing, at least partially and/or temporarily bears against the latter, in such a way that a releasable form-fitting and/or frictional connection is formed between the coupling body and the spring bearing, and/or in that a releasable form-fitting and/or frictional connection is formed between the coupling body and the preloading element. As a result of the fact that the coupling element partially and/or temporarily bears against the spring bearing during adjustment, a force may be transmitted from the preloading element to the spring bearing via the coupling element. The releasable connection between the coupling body and the spring bearing, on the one hand, prevents inadmissibly large forces from being exerted on the adjusting mechanism in a particularly simple manner. Impermissibly large forces may occur, for example, if the adjusting mechanism continues to be actuated by a user even though an end position, for example a position of maximum or minimum set preload of the spring element, has already been reached. Also, actuation of the adjustment mechanism by unsuitable means, for example driven tools, may cause impermissibly large forces acting on the adjustment mechanism. On the other hand, the releasable connection also allows permissible operating forces to be reliably transmitted again after the action of the impermissibly high operating force has been prevented. A releasable connection in this case may, for example, be such that it is releasable in a circumferential direction so that, in the manner of a slip clutch, when a permissible force or a permissible moment is exceeded, for example, the clutch body is rotatable relative to the spring bearing. In this context, a circumferential direction means a direction of rotation about an axis oriented in the direction of adjustment, for example the central longitudinal axis of the preloading element and/or the spring element. Accordingly, a radial direction is perpendicular to this axis. The releasability of the connection may be realized in a particularly advantageous manner in that the connection between the coupling body and the spring bearing is form-fitting and/or frictional. The spring bearing may also be composed of several components, with the coupling body being relatively adjustable with respect to at least one of these components in order to release the coupling connection. Of course, the spring element may also be composed of several components, for example several springs. According to a preferred variant of the invention, it may be provided that the preloading element has a threaded section with preferably an external thread and in that the coupling body has a threaded receptacle with preferably an internal thread and in that an adjusting means for adjusting the coupling body relative to the preloading element is formed by means of the threaded section and the threaded receptacle, preferably in that the thread