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CN-115956768-B - Mechanism for a piece of seating furniture, in particular for an office chair

CN115956768BCN 115956768 BCN115956768 BCN 115956768BCN-115956768-B

Abstract

The present invention relates to a mechanism for a seating, in particular for an office chair. The invention also relates to a piece of seating, in particular an office chair, comprising such a mechanism. In order to provide a seat, in particular an office chair, with a particularly simple adjustment of the pivoting resistance and yet a relatively simple construction, a mechanism (10) is proposed, which has a plurality of mechanism parts, comprising at least a base carrier (1), a seat carrier (3) which is arranged on the base carrier (1) and is movable relative to the base carrier (1), and a backrest carrier (4) which is coupled to the seat carrier (3), wherein the pivoting of the backrest carrier (4) causes a movement of the seat carrier (3) relative to the base carrier (1), and the mechanism has a spring system (30) for loading the seat carrier (3) against the movement of the backrest carrier (4), wherein the spring system (30) has two spring assemblies (31, 32) which are connected in series.

Inventors

  • BOCK HERMANN
  • G. Wacht

Assignees

  • 博克1有限责任两合公司
  • 博克精密部件(广东)有限公司

Dates

Publication Date
20260505
Application Date
20221010
Priority Date
20211008

Claims (17)

  1. 1. A mechanism (10) for a seat, -The mechanism has a plurality of mechanism parts, the mechanism parts comprising at least: a base carrier (1), A seat carrier (3) which is arranged on the base carrier (1) and is movable relative to the base carrier (1), And a backrest carrier (4) coupled to the seat carrier (3), wherein a pivoting of the backrest carrier (4) causes a movement of the seat carrier (3) relative to the base carrier (1), -And the mechanism has a spring system (30) for loading the seat carrier (3) against the movement of the backrest carrier (4), wherein the spring system (30) has two spring assemblies (31, 32) connected in series, at least one of the two spring assemblies having a spring element which is configured as an elastically deformable element integrated in one piece into the mechanism part, which elastically deformable element serves as an energy storage element.
  2. 2. The mechanism (10) according to claim 1, wherein the two spring assemblies (31, 32) have spring elements (8, 9), which differ from each other in terms of their structure and/or their mode of action.
  3. 3. A mechanism (10) according to claim 1 or 2, wherein the two spring assemblies (31, 32) are connected to each other at a connection site (15), wherein the position of the connection site (15) relative to at least one of the mechanism parts is changeable.
  4. 4. The mechanism (10) according to claim 3, Wherein the first spring assembly (31) acts between the base carrier (1) and the connection point (15), and Wherein the second spring assembly (32) acts between the connection point (15) and the seat carrier (3).
  5. 5. The mechanism (10) according to claim 3, Wherein the movement region in which the position of the connection point (15) can be changed, And/or Wherein the position of the connection point (15) can be fixed relative to at least one of the mechanism parts.
  6. 6. A mechanism (10) according to claim 3, wherein the connection site (15) is defined by a common coupling element (16) on which the two spring assemblies (31, 32) act.
  7. 7. The mechanism (10) according to claim 6, wherein the coupling element (16) is guided in a guide (24) provided by a mechanism component.
  8. 8. The mechanism (10) according to claim 7, wherein the coupling element (16) can be fixed in the guide (24) using a handling mechanism (33).
  9. 9. The mechanism (10) according to claim 7 or 8, wherein the travel that can be passed in the guide (24) during a change in position of the coupling element (16) can be selectively changed.
  10. 10. The mechanism (10) of claim 1, wherein the seat is an office chair.
  11. 11. A mechanism (10) according to claim 3, wherein the position of the connection point (15) relative to the seat carrier (3) is changeable.
  12. 12. The mechanism (10) according to claim 4, wherein the first spring assembly (31) is configured as an integral part of the base carrier (1).
  13. 13. The mechanism (10) according to claim 4, wherein the second spring assembly (32) is configured as an integral part of the seat carrier (3).
  14. 14. The mechanism (10) according to claim 7, wherein the coupling element (16) is configured as a coupling rod extending perpendicular to the seat longitudinal direction (14).
  15. 15. The mechanism (10) according to claim 9, wherein, with the use of the actuating mechanism (33) which can be used to fix the coupling element (16), the travel which can be passed through in the guide (24) during a change in position of the coupling element (16) can be selectively changed.
  16. 16. A seating comprising a mechanism (10) according to any one of claims 1 to 15.
  17. 17. The seating of claim 16, wherein the seating is an office chair.

Description

Mechanism for a piece of seating furniture, in particular for an office chair Technical Field The present invention relates to a mechanism for a seating, in particular for an office chair. The invention also relates to a piece of seating, in particular an office chair, comprising such a mechanism. Background As a mechanism for office chairs, a synchronous mechanism is known. The term "synchronization mechanism" is understood here to mean a component in the seat substructure of an office chair, which component implements kinematics which in turn bring about a specific relative movement of the seat and the backrest relative to one another, which are coupled to one another. A seat of an office chair, which is usually provided with a padded seating surface, is mounted on a seat carrier. A back carrier, which typically extends rearwardly from the actual synchrony mechanism, carries the back of the office chair at an upwardly extending boom. The seat carrier and the backrest carrier are typically hingedly coupled in such a way that a rearward pivoting movement of the backrest (which may be caused, for example, by a seat user leaning onto the backrest) results in a subsequent movement of the seat. The spring mechanism is used to load the seat carrier against movement of the back carrier. The spring mechanism prevents uncontrolled tilting of the backrest back and ensures that the backrest reliably returns from the pivoted-back position to the initial position once the backrest part is no longer loaded by the user of the office chair. Such spring mechanisms are typically composed of a centrally disposed extension spring. By means of such a spring mechanism, the pivoting resistance of the backrest carrier can be adjusted or influenced. For this purpose, the spring mechanism usually has an adjusting device. As can be derived directly from the description of the principle of action, such mechanisms are generally composed of a number of components and/or are very complex in construction and therefore expensive to manufacture. Disclosure of Invention The object of the invention is to provide a seat, in particular an office chair, which has a particularly simple adjustment of the pivoting resistance and which is nevertheless relatively simple to construct. The advantages and designs described below in connection with the mechanism are also applicable in the sense of a seat according to the invention and vice versa. The invention proceeds from a conventional mechanism, in particular an office chair mechanism, comprising a plurality of mechanism parts, namely at least one base carrier which can be mounted on a chair leg, a seat carrier which is arranged on the base carrier and is movable relative to the base carrier, and a backrest carrier which is coupled to the seat carrier, wherein a rearward pivoting of the backrest carrier causes a subsequent movement of the seat carrier relative to the base carrier. The core idea of the invention is to use a spring system with two spring assemblies arranged in series, i.e. one after the other, instead of a conventional spring mechanism, in order to load the seat carrier against the movement of the backrest carrier. Since each spring assembly has at least one spring element, the spring system comprises at least two spring elements. In this way, the pivoting resistance can be adjusted particularly easily. At the same time, the spring behavior of the mechanism can thereby be influenced by particularly simple means, so that the total number of components required for the mechanism can be reduced compared to conventional mechanisms. In particular, by using a spring system instead of a single spring, the structure of the mechanism can be simplified in that the spring elements and/or the spring assemblies of the spring system can be selectively connected in a particularly easy manner or can be selectively influenced in terms of their functional properties. In a preferred embodiment of the invention, the spring element of one spring assembly differs from the spring element of the other spring assembly in terms of its structure and/or manner of action. In this way, the spring characteristics of the spring system can be changed particularly easily. According to one embodiment of the invention, the spring system preferably acts between, i.e. on, the base carrier and the seat carrier. It has proved to be particularly advantageous if the two spring assemblies are connected to one another at a connection point, the first spring assembly acting between the base carrier and the connection point and the second spring assembly acting between the connection point and the seat carrier. According to one embodiment of the invention, the number of components used is preferably reduced by the first spring assembly being configured as an integral part of the base carrier and/or the second spring assembly being configured as an integral part of the seat carrier. According to one embodiment of the invention, at