A rollover damping adjustment device

Abstract

The present invention discloses a rollover damping adjustment device, including a support base and an elastic member, wherein a seat swivel is provided on the support base, the seat swivel is hinged to the support base, and the seat swivel rotates on the support base around its hinge point; a pre-tightening adjustment component is also provided on the support base, and the pre-tightening adjustment component is connected to the elastic member for adjusting the pre-tightening force of the elastic member; the elastic member is connected to the seat swivel to provide resistance when the seat swivel rotates. The significant effect of the present invention is that by setting the pre-tightening adjustment component, the elastic member providing the rollover resistance can be pre-tightened, so that the user can adjust the rollover resistance according to their own needs.

Description

Technical Field

[0001] The invention relates to a functional adjustment mechanism of a seat, in particular to a rotation resistance adjustment mechanism for a seat back and / or a seat cushion during a turning process. Background Art

[0002] Office chairs are important office tools. As office workers' demand for office chair comfort continues to increase, office chairs are gradually developing in a multifunctional direction. At this stage, in addition to meeting the needs of people sitting, multifunctional office chairs also need to meet the following needs:

[0003] 1. The seat back can be tilted, and the tilting angle can be adjusted and fixed to meet the different lying needs of passengers, such as half-lying or full-lying;

[0004] 2. The seat cushion can be flipped at a certain angle so that the front part of the seat cushion faces upward and the back part faces downward, thereby raising the knees of passengers to varying degrees;

[0005] 3. When passengers are resting, the leg rest can provide support for their legs to improve comfort.

[0006] To meet the above needs, engineers in related fields have some research results that can meet the corresponding needs separately. However, due to the lack of overall coordination, on the one hand, the structure used in the existing technology is not streamlined enough. On the other hand, after combining the above functions using the existing technology, the office chair structure is complex and bloated, and there is serious interference between the structures corresponding to the functions, and there are disadvantages such as heavy weight and lack of aesthetics. Therefore, it is necessary to re-plan the implementation methods of each demand and integrate the functions. During the integration process, various structural parts and linkage relationships need to be re-planned and designed.

[0007] Specifically, in the prior art, when adjusting the rotation of the backrest, seat pan / seat cushion, it is necessary to control the rotation resistance to improve the rotation stability. In actual use, each user has different height, weight and other factors, resulting in different feelings about the rotation resistance, and thus inconsistent requirements for the size of the rotation resistance, but the existing design can only provide a fixed resistance size. Summary of the invention

[0008] In view of this, the present invention provides a device that can actively adjust the rotation resistance during the flipping process of the seat back and / or seat cushion. The technical solution is as follows:

[0009] A rollover damping adjustment device, the key of which is: comprising a support base and an elastic member, the support base is provided with a seat support rotating seat, the seat support rotating seat is hinged to the support base, and the seat support rotating seat rotates on the support base around its hinge point;

[0010] A preload adjustment component is also provided on the support base, and the preload adjustment component is connected to the elastic member and is used to adjust the preload force of the elastic member;

[0011] The elastic member is connected to the seat support rotating seat to provide resistance when the seat support rotating seat rotates.

[0012] Compared with the prior art, the present invention has the following beneficial effects: by providing a pre-tightening adjustment component, the elastic member providing the rollover resistance can be pre-tightened, so that the user can independently adjust the rollover resistance according to his own needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention in the first state;

[0014] Figure 2 is a schematic diagram of the three-dimensional structure of the present invention in the second state;

[0015] Figure 3 It is a schematic diagram of the planar structure of the present invention;

[0016] Figure 4 for Figure 3 XX` sectional view;

[0017] Figure 5 It is a schematic diagram of the connection relationship between the lifting connecting rod 6, the linkage seat 7 and the seat cushion 8 from a first viewing angle;

[0018] Figure 6 It is a schematic diagram of the connection relationship between the lifting connecting rod 6, the linkage seat 7 and the seat cushion 8 from a second viewing angle.

[0019] Figure 7 It is a schematic diagram of the corresponding relationship between the push cam 22 and the elastic member 1. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with embodiments and drawings.

[0021] like Figure 1-7 As shown, a rollover damping adjustment device comprises a support base 9 and an elastic member 1, the support base 9 is provided with a seat swivel seat 7, the seat swivel seat 7 is hinged to the support base 9, and the seat swivel seat 7 rotates on the support base 9 around its hinge point;

[0022] A preload adjustment component 2 is also provided on the support base 9, and the preload adjustment component 2 is connected to the elastic member 1 and is used to adjust the preload force of the elastic member 1;

[0023] The elastic member 1 is hinged to the seat support rotating seat 7 so that the elastic member 1 can perform adaptive rotation and provide resistance when the seat support rotating seat 7 rotates.

[0024] The preload adjustment assembly 2 includes an elastic member restraining seat 21, which is fixed on the supporting base 9. A strip restraining hole is provided on the elastic member restraining seat 21. The length direction of the strip restraining hole is arranged along the deformation direction of the elastic member 1. The elastic member 1 is deformed by moving the positioning head along the strip restraining hole. An elastic member pushing mechanism is also provided on the elastic member restraining seat 21. The elastic member pushing mechanism acts on the elastic member 1 to cause it to deform along the direction of the strip restraining hole.

[0025] The elastic member pushing mechanism includes a pushing cam 22, which is installed on the elastic member restraining seat 21 through a camshaft. The pushing cam 22 is arranged corresponding to the elastic member 1 and contacts therewith; a driven gear 23 is fixedly sleeved on the camshaft, and a driving gear 24 is installed on the support base 9. The driving gear 24 is installed on the support base 9 through a gear shaft, and a handle 25 is fixed on the gear shaft. The driving gear 24 is meshed with the driven gear 23.

[0026] The elastic member 1 is a spring, which can be a coil spring or a gas spring. One end of the spring is hinged to the seat support swivel 7, and the other end of the spring is fixed with the locking head, which is slidably assembled in the strip constraint hole, and the push cam 22 is in abutment against the locking head.

[0027] The support base 9 is also provided with a seat cushion 8, the rear part of which is hinged to the support base 9, and the seat swivel seat 7 is connected to a lifting link 6, one end of which is hinged to the seat swivel seat 7, and the other end of which is hinged to the seat cushion 8.

[0028] Specifically: the seat support swivel seat 7 includes a linkage propulsion seat 71 and a linkage propulsion arm 72, the linkage propulsion seat 71 is hinged to the support base 9, one end of the linkage propulsion arm 72 is connected to the linkage propulsion seat 71, and the other end of the linkage propulsion arm 72 extends forward, and the front end of the linkage propulsion arm 72 is hinged to the lifting connecting rod 6.

[0029] In order to adapt to different adjustment requirements: a lifting constraint track is also provided on the support base 9, and the hinge point between the lifting link 6 and the linkage propulsion arm 72 is limited by the lifting constraint track and moves according to the set constraint track.

[0030] A specific constraint trajectory scheme may be: a trajectory constraint vertical plate is provided on the support base 9, a positioning groove is provided on the trajectory constraint vertical plate, the lifting connecting rod 6 and the seat support swivel seat 7 are hinged through a trajectory constraint shaft 5, one end of the trajectory constraint shaft 5 is inserted in the positioning groove and moves along the lifting constraint trajectory.

[0031] According to the direction of the lift constraint trajectory:

[0032] When the lifting constraint trajectory is a constraint arc, and the center of the constraint arc coincides with the hinge point between the linkage propulsion seat 71 and the support base 9, the linkage propulsion arm 72 and the linkage propulsion seat 71 can be hinged or fixed.

[0033] When the lifting constraint trajectory is set arbitrarily and is not an arc, or the center of the arc does not coincide with the hinge point between the linkage propulsion seat 71 and the support base 9, the linkage propulsion arm 72 should be hinged to the linkage propulsion seat 71.

[0034] The support base 9 includes a shell bottom 91, the edges of which are folded upward to form shell flanges 92, and the seat swivel seats 7 are hinged on the inner walls of the two shell flanges 92 facing each other on the left and right, and the seat swivel seats 7 are respectively connected to the lifting connecting rods 6; the seat swivel seats 7 on the two shell flanges 92 facing each other on the left and right are fixedly connected by a lifting synchronization rod 73, and the two ends of the lifting synchronization rod 73 are respectively fixedly connected to the corresponding linkage propulsion seats 71, and the elastic member 1 is hinged to the linkage propulsion seat 71 of any one of the seat swivel seats 7.

[0035] The seat swivel 7 is also connected to a backrest assembly, and the lower part of the backrest assembly is fixedly connected to the seat swivel 7. Specifically, the backrest assembly includes a backrest body and a backrest connecting plate 4, and the backrest connecting plate 4 is respectively provided on the outer side of the shell flange 92 corresponding to each seat swivel 7, and the backrest connecting plate 4 is fixedly connected to the hinge shaft of the seat swivel 7, and the backrest connecting plate 4 extends to the rear of the seat cushion 8 and then folds inward to form a backrest fixing portion, and a backrest fixing hole is provided on the backrest fixing portion, and the backrest connecting plates 4 on the left and right sides are connected to the same backrest body (not shown in the figure).

[0036] In order to adjust the adjusted backrest and / or seat cushion 8, a controllable gas spring s is further provided, one end of which is hinged to the support base 9, and the other end of which is hinged to the seat swivel 7. The controllable gas spring s is a prior art, which has the function of being able to stop at any position and is provided with an unlocking cable. The controllable gas spring s can be unlocked by setting a handle or a buckle to operate the unlocking cable. The controllable gas spring s can automatically extend and retract in the unlocked state, and cannot extend and retract in the locked state.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make various similar expressions without violating the purpose and claims of the present invention, and such changes all fall within the scope of protection of the present invention.

Claims

1. A rollover damping adjustment device, characterized in that: It comprises a support base (9) and an elastic member (1), wherein a seat swivel seat (7) is provided on the support base (9), the seat swivel seat (7) is hinged to the support base (9), and the seat swivel seat (7) rotates on the support base (9) around its hinge point; A preload adjustment component (2) is also provided on the support base (9), and the preload adjustment component (2) is connected to the elastic member (1) and is used to adjust the preload force of the elastic member (1); The elastic member (1) is connected to the seat support rotating seat (7) to provide resistance when the seat support rotating seat (7) rotates; The preload adjustment assembly (2) comprises an elastic member restraining seat (21), the elastic member restraining seat (21) being fixed on the supporting base (9), a strip restraining hole being provided on the elastic member restraining seat (21), the length direction of the strip restraining hole being arranged along the deformation direction of the elastic member (1), the elastic member (1) being deformed by the movement of the positioning head along the strip restraining hole, and an elastic member pushing mechanism being further provided on the elastic member restraining seat (21), the elastic member pushing mechanism acting on the elastic member (1) causing it to deform along the direction of the strip restraining hole; The elastic member pushing mechanism comprises a pushing cam (22), the pushing cam (22) being mounted on the elastic member restraining seat (21) via a cam shaft, the pushing cam (22) being arranged corresponding to the elastic member (1) and in contact with the elastic member (1); A driven gear (23) is fixedly sleeved on the camshaft, and a driving gear (24) is mounted on the support base (9), the driving gear (24) meshing with the driven gear (23); The support base (9) is also provided with a seat cushion (8), the rear portion of the seat cushion (8) is hinged to the support base (9), the seat swivel seat (7) is connected to a lifting connecting rod (6), one end of the lifting connecting rod (6) is hinged to the seat swivel seat (7), and the other end of the lifting connecting rod (6) is hinged to the seat cushion (8); The seat-supporting rotating seat (7) comprises a linkage propulsion seat (71) and a linkage propulsion arm (72), wherein the linkage propulsion seat (71) is hinged to the supporting base (9), one end of the linkage propulsion arm (72) is connected to the linkage propulsion seat (71), the other end of the linkage propulsion arm (72) extends forward, and the front end of the linkage propulsion arm (72) is hinged to the lifting connecting rod (6); A lifting constraint track is also provided on the support base (9), and the hinge point between the lifting link (6) and the linkage propulsion arm (72) is limited by the lifting constraint track and moves according to the set constraint track; The seat back swivel seat (7) is also connected to a backrest assembly, and the lower part of the backrest assembly is fixedly connected to the seat back swivel seat (7).

2. A rollover damping adjustment device according to claim 1, characterized in that: The elastic member (1) is hingedly connected to the seat support rotating seat (7) so that the elastic member (1) can perform adaptive rotation.

3. A rollover damping adjustment device according to claim 1 or 2, characterized in that: The elastic member (1) is a spring, one end of which is hinged to the seat support rotating seat (7), and the other end of the spring is fixed with the locking head, which is slidably assembled in the strip-shaped constraint hole, and the push cam (22) is in contact with the locking head.

4. A rollover damping adjustment device according to claim 1 or 2, characterized in that: The driving gear (24) is mounted on the supporting base (9) via a gear shaft, and a handle (25) is fixed on the gear shaft.

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