A chair

Abstract

The present invention discloses a seat, including a support base for overall support; a seat cushion, the rear of which is hinged to the support base and can rotate around it; a backrest, the lower part of which is hinged to the support base and can rotate around it; a synchronous linkage mechanism is connected between the seat cushion and the backrest, and the synchronous linkage mechanism relates the rotational power of the seat cushion and the backrest to each other so that the two can rotate relatively together; a damping adjustment mechanism is provided on the support base, and the damping adjustment mechanism acts with the backrest or the seat cushion to adjust the rotation resistance; a flip locking mechanism is also provided on the support base, and the flip locking mechanism acts with the backrest or the seat cushion to lock in place. The significant effect of adopting the present invention is to improve the coordination of the seat back and the seat basin / seat cushion during rotation adjustment; it can adjust the flip resistance size according to different customer needs, and has a self-recovery function after adjustment, which simplifies the structure and reduces the cost.

Description

Technical Field

[0001] The invention relates to a multifunctional integrated seat. 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, the backrest and seat basin / seat cushion are mostly adjusted independently during rotation. The two need to be provided with independent flip structures and power devices, with weak synchronization and high cost. The rotation resistance is not adjustable, and the response to customer needs is not timely. Moreover, after adjustment, it generally does not have a self-recovery function, and manual reverse operation or setting of an electric mechanism is required for recovery. Summary of the invention

[0008] In view of this, without solving the above technical problems, the present invention provides a seat.

[0009] The technical solution is as follows:

[0010] A chair, the key of which is: comprising a support base for providing overall support;

[0011] It includes a seat cushion, the rear portion of which is hinged to the support base so as to be rotatable thereabout;

[0012] It includes a backrest, the lower part of which is hinged to the support base so as to be rotatable thereabout;

[0013] A synchronous linkage mechanism is connected between the seat cushion and the backrest, and the synchronous linkage mechanism relates the rotational power of the seat cushion and the backrest to each other so that the two can rotate relatively and simultaneously;

[0014] A damping adjustment mechanism is provided on the support base, and the damping adjustment mechanism acts with the backrest or the seat cushion to adjust the rotation resistance;

[0015] A flip locking mechanism is also provided on the support base, and the flip locking mechanism acts with the backrest or the seat cushion to lock the seat in place.

[0016] Compared with the prior art, the beneficial effects of the present invention are: it can improve the coordination of the seat back and seat basin / seat cushion during rotation adjustment; it can independently adjust the size of the flipping resistance according to different customer needs, and has a self-recovery function after adjustment, which simplifies the structure and reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention in the first state;

[0018] Figure 2 is a schematic diagram of the three-dimensional structure of the present invention in the second state;

[0019] Figure 3 It is a schematic diagram of the planar structure of the present invention;

[0020] Figure 4 for Figure 3 XX` sectional view;

[0021] Figure 5 Schematic diagram of the connection relationship between the lifting link 66, the linkage seat 67 and the seat cushion 50 from a first viewing angle;

[0022] Figure 6 Schematic diagram of the connection relationship between the lifting link 66, the linkage seat 67 and the seat cushion 50 from a second viewing angle.

[0023] Figure 7 It is a schematic diagram of the corresponding relationship between the push cam 622 and the elastic member 51. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with embodiments and drawings.

[0025] like Figure 1-7 As shown:

[0026] A chair, comprising a support base 90, for providing overall support;

[0027] It includes a seat cushion 50, the rear portion of which is hinged to the support base 90 and can rotate around it;

[0028] It includes a backrest, the lower part of which is hinged to the support base 90 so as to be rotatable thereabout;

[0029] A synchronous linkage mechanism is connected between the seat cushion 50 and the backrest, and the synchronous linkage mechanism links the rotational power of the seat cushion 50 and the backrest to each other so that the two can rotate relatively together;

[0030] A damping adjustment mechanism is provided on the support base 90, and the damping adjustment mechanism acts with the backrest or the seat cushion 50 to adjust the rotation resistance;

[0031] The support base 90 is also provided with a flip locking mechanism, which acts together with the backrest or the seat cushion 50 to lock the seat in place.

[0032] The above scheme is further elaborated as follows:

[0033] The synchronous linkage mechanism includes a seat-back linkage rotating seat 67, which is hinged to the rear of the support base 90, and the seat-back linkage rotating seat 67 rotates on the support base 90 around its hinge point;

[0034] The backrest is fixed on the seat-back linkage rotating seat 67, and the seat cushion 50 is hinged to the back-back linkage rotating seat 67;

[0035] The seat-back linkage swivel seat 67 is connected to a seat cushion lifting link 66 , one end of the seat cushion lifting link 66 is hinged to the seat-back linkage swivel seat 67 , and the other end of the seat cushion lifting link 66 is hinged to the seat cushion 50 .

[0036] The seat-back linkage swivel seat 67 includes a linkage propulsion seat 671 and a linkage propulsion arm 672, wherein the linkage propulsion seat 671 is hinged to the support base 90, one end of the linkage propulsion arm 672 is connected to the linkage propulsion seat 671, and the other end of the linkage propulsion arm 672 extends forward, and the front end of the linkage propulsion arm 672 is hinged to the seat cushion lifting connecting rod 66.

[0037] In order to adapt to different seat basin adjustment requirements: a lifting constraint track is also provided on the support base 90 to limit the rotation angle and speed of the seat cushion 50, and the hinge point between the seat cushion lifting link 66 and the seat back linkage swivel 67 is limited by the lifting constraint track and moves according to the set constraint track.

[0038] A specific constraint trajectory scheme may be: a retaining groove is provided on the support base 90, and the retaining groove is arranged along the lifting constraint trajectory; the seat cushion lifting connecting rod 66 and the seat back linkage swivel seat 67 are hinged through a trajectory constraint shaft 65; one end of the trajectory constraint shaft 65 is inserted in the retaining groove and moves along the lifting constraint trajectory.

[0039] According to the direction of the lift constraint trajectory:

[0040] 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 671 and the support base 90, the linkage propulsion arm 672 and the linkage propulsion seat 671 may be hinged or fixed;

[0041] 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 671 and the support base 90, the linkage propulsion arm 672 should be hinged to the linkage propulsion seat 671.

[0042] The damping adjustment mechanism includes an elastic member 51 and a preload adjustment component 52, wherein the preload adjustment component 52 is fixed on the support base 90;

[0043] The elastic member 51 is connected to the seat-joint rotating seat 67 to provide rotation resistance thereto;

[0044] The preload adjustment assembly 52 is connected to the elastic member 51 to adjust the preload force thereof.

[0045] The preload adjustment assembly 52 includes an elastic member restraining seat 521, which is fixed on the support base 90. A strip restraining hole is provided on the elastic member restraining seat 521. The length direction of the strip restraining hole is arranged along the deformation direction of the elastic member 51. The elastic member 51 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 521. The elastic member pushing mechanism acts on the elastic member 51 to cause it to deform along the direction of the strip restraining hole. As a more specific embodiment, the elastic member pushing mechanism includes a pushing cam 522, which is installed on the elastic member constraint seat 521 through a cam shaft, and the pushing cam 522 is arranged corresponding to the elastic member 51 and contacts with it; specifically, the elastic member 51 is a coil spring or a gas spring, one end of the elastic member 51 is hinged to the seat linkage rotating seat 67, and the other end of the elastic member 51 is fixed with the locking head, which is slidably assembled in the strip constraint hole, and the pushing cam 522 is in contact with the locking head;

[0046] A driven gear 523 is fixedly sleeved on the camshaft, and a driving gear 524 is installed on the support base 90. The driving gear 524 meshes with the driven gear 523. The driving gear 524 is installed on the support base 90 through a gear shaft, and a handle 525 is also fixed on the gear shaft.

[0047] The flip locking mechanism includes a controllable gas spring 42 and a locking support 41, wherein the locking support 41 is fixed on the support base 90; one end of the controllable gas spring 42 is hinged to the support base 90, and the other end of the controllable gas spring 42 is hinged to the seat linkage swivel 67.

[0048] The controllable gas spring 42 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 42 can be unlocked by setting a handle or a buckle to operate the unlocking cable. The controllable gas spring 42 can automatically extend and retract in the unlocked state, and the controllable gas spring 2 cannot extend and retract in the locked state.

[0049] The support base 90 includes a shell bottom 91, the edges of which are folded upward to form shell flanges 92, and the seat linkage swivel seats 67 are hinged on the inner walls of the two shell flanges 92 facing each other on the left and right, and the seat linkage swivel seats 67 are respectively connected to the seat cushion lifting connecting rods 66; the elastic member 51 is connected to one of the seat linkage swivel seats 67, and the preload adjustment assembly 52 is located in front of the corresponding seat linkage swivel seat 67; the controllable gas spring 42 is hinged to the other seat linkage swivel seat 67, and the locking support 41 is located in front of the corresponding seat linkage swivel seat 67; the two seat linkage swivel seats 67 facing each other on the left and right are connected by a lifting synchronization rod 673.

[0050] The backrest includes a backrest body and a backrest connecting plate 4x. The backrest connecting plate 4x is respectively provided on the outer side of the shell flange 92 corresponding to each of the seat-back linkage swivel seats 67. The backrest connecting plate 4x is fixedly connected to the hinge axis of the seat-back linkage swivel seat 67. The backrest connecting plate 4x extends to the rear of the seat cushion 50 and then folds inward to form a backrest fixing portion, on which a backrest fixing hole is provided. The backrest connecting plates 4x on the left and right sides are connected to the same backrest body (not shown in the figure).

[0051] 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 seat, characterized in that: It comprises a support base (90) for providing overall support; It comprises a seat cushion (50), the rear portion of which is hinged to the support base (90) and can rotate around it; It comprises a backrest, the lower part of which is hinged to the support base (90) and can rotate around it; A synchronous linkage mechanism is connected between the seat cushion (50) and the backrest, and the synchronous linkage mechanism mutually relates the rotational power of the seat cushion (50) and the backrest so that the two can rotate relatively and simultaneously; A damping adjustment mechanism is provided on the support base (90), and the damping adjustment mechanism acts together with the backrest or the seat cushion (50) to adjust the rotation resistance; A flip locking mechanism is also provided on the support base (90), and the flip locking mechanism acts together with the backrest or the seat cushion (50) to lock the seat in place. The synchronous linkage mechanism comprises a seat-rest linkage rotating seat (67), the seat-rest linkage rotating seat (67) being hinged to the rear of the support base (90), and the seat-rest linkage rotating seat (67) rotating on the support base (90) around its hinge point; The backrest is fixed on the seat-back linkage swivel seat (67), and the seat cushion (50) is hingedly connected to the backrest linkage swivel seat (67); The seat back linkage swivel seat (67) is connected to a seat cushion lifting connecting rod (66), one end of the seat cushion lifting connecting rod (66) is hinged to the seat back linkage swivel seat (67), and the other end of the seat cushion lifting connecting rod (66) is hinged to the seat cushion (50); A lifting constraint track is also provided on the support base (90), and the hinge point between the seat cushion lifting connecting rod (66) and the seat back linkage rotating seat (67) is limited by the lifting constraint track and moves according to the set constraint track; A retaining groove is provided on the support base (90), and the retaining groove is arranged along the lifting constraint track. The seat cushion lifting connecting rod (66) and the seat back linkage rotating seat (67) are hinged via a track constraint shaft (65), and one end of the track constraint shaft (65) is inserted into the retaining groove and moves along the lifting constraint track. The damping adjustment mechanism comprises an elastic member (51) and a pre-tension adjustment component (52), wherein the pre-tension adjustment component (52) is fixed on the support base (90); The elastic member (51) is connected to the seat-jointed rotating seat (67) to provide rotation resistance thereto; The preload adjustment component (52) is connected to the elastic member (51) to adjust its preload force; The preload adjustment assembly (52) comprises an elastic member restraining seat (521), the elastic member restraining seat (521) being fixed on the supporting base (90), a strip-shaped restraining hole being provided on the elastic member restraining seat (521), the length direction of the strip-shaped restraining hole being arranged along the deformation direction of the elastic member (51), the elastic member (51) being deformed by moving along the strip-shaped restraining hole through the positioning head, and an elastic member pushing mechanism being further provided on the elastic member restraining seat (521), the elastic member pushing mechanism acting on the elastic member (51) causing the elastic member (51) to deform in the direction of the strip-shaped restraining hole; The elastic member pushing mechanism comprises a pushing cam (522), the pushing cam (522) being mounted on the elastic member restraining seat (521) via a cam shaft, the pushing cam (522) being arranged corresponding to the elastic member (51) and in contact with the elastic member (51); A driven gear (523) is fixedly sleeved on the camshaft, and a driving gear (524) is mounted on the support base (90). The driving gear (524) meshes with the driven gear (523). The driving gear (524) is mounted on the support base (90) via a gear shaft, and a handle (525) is also fixed on the gear shaft.

2. A seat according to claim 1, characterized in that: The flip locking mechanism comprises a controllable gas spring (42) and a locking support (41), wherein the locking support (41) is fixed on the supporting base (90); One end of the controllable gas spring (42) is hinged to the support base (90), and the other end of the controllable gas spring (42) is hinged to the seat-jointed rotating seat (67).

3. A seat according to claim 2, characterized in that: The seat back linkage rotating seat (67) comprises a linkage propulsion seat (671) and a linkage propulsion arm (672); the linkage propulsion seat (671) is hinged to the support base (90); one end of the linkage propulsion arm (672) is connected to the linkage propulsion seat (671); the other end of the linkage propulsion arm (672) extends forward; and the front end of the linkage propulsion arm (672) is hinged to the seat cushion lifting connecting rod (66).

4. A seat according to claim 3, characterized in that: The support base (90) comprises a shell bottom (91), the edges of which are folded upward to form shell flanges (92), the seat back linkage swivel seats (67) being hingedly connected to the inner walls of two shell flanges (92) facing each other on the left and right, and the seat back linkage swivel seats (67) are respectively connected to the seat cushion lifting connecting rods (66); The elastic member (51) is connected to one of the seat-supporting linkage rotating seats (67), and the preload adjustment component (52) is located in front of the corresponding seat-supporting linkage rotating seat (67); the controllable gas spring (42) is hinged to the other seat-supporting linkage rotating seat (67), and the locking support (41) is located in front of the corresponding seat-supporting linkage rotating seat (67); The two seats facing each other on the left and right are connected by the linkage rotating seats (67) via a lifting synchronous rod (673).

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