Seat chassis structure

Abstract

The utility model discloses a seat chassis structure which comprises a seat plate, a tail plate, a locking seat, a connecting rod, a connecting seat, a positioning part and an elastic assembly, the locking seat is provided with a first hinge point and a second hinge point, the tail plate is provided with a connecting plate, the connecting rod is respectively hinged to the first hinge point and the second hinge point, the connecting seat is provided with a third hinge point, a fourth hinge point and a fifth hinge point, and the positioning part extends to form an extending part and a positioning part. The elastic assembly comprises a first connector, a second connector and a spring, the second connector acts on the extending part, the locking seat is provided with a positioning table, and the positioning part and the positioning table are mutually limited to limit the adjusting angle of the tail plate; thus, the first hinge point, the second hinge point and the connecting plate form a four-connecting-rod structure to achieve angle adjustment of the backrest, the positioning table, the positioning piece and the elastic assembly are arranged in a matched mode to achieve limiting of the angle of the backrest, the supporting force use of the backrest is guaranteed, and therefore the experience effect of a user in the backrest process is improved, usability is good, and the application range is wide.

Description

Technical Field

[0001] The utility model relates to the technology of the seat field, in particular to a seat chassis structure. Background Art

[0002] As people's quality of life improves, the requirements for common furniture such as chairs are also getting higher and higher, mainly reflected in the comfort of use; chairs are used in many scenarios, especially in offices, where people spend almost all their time at work with chairs; traditional chairs have a single structure and function, and the seat and backrest of the chair are generally designed as an integrated whole, and the angle between the backrest and the seat is fixed, which makes the user's back uncomfortable when it is close to the backrest.

[0003] Later, a type of chair appeared on the market, in which the seat plate and backrest were of split design. The seat plate and backrest were connected by a seat chassis, and an adjustment module for adjusting the inclination of the backrest was provided on the chassis to realize the inclination adjustment of the backrest, thereby improving the user's experience when leaning back. However, the existing seat chassis structure is poorly designed. After the angle of the backrest is adjusted, the backrest is fixed, which makes the user feel bad when putting his back close to the backrest, affecting the user's experience, poor usability, and a small scope of application.

[0004] Therefore, it is necessary to study a new technical solution to solve the above problems. Utility Model Content

[0005] In view of this, the present invention aims to address the deficiencies in the prior art, and its main purpose is to provide a seat chassis structure, which utilizes a first and second hinge points and a connecting plate to form a four-link structure to achieve angle adjustment of the backrest, and cooperates with the setting of a positioning platform, a positioning part and an elastic component to achieve the limitation of the backrest angle, thereby ensuring the use of the backrest's supporting force, thereby improving the user's experience when leaning back, and has good usability and a wide range of applications.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A seat chassis structure includes a seat plate, a tail plate, a locking seat, a connecting rod, a connecting seat, a positioning piece and an elastic component, wherein the locking seat, the connecting rod, the connecting seat, the positioning piece and the elastic component are all located below the seat plate, the locking seat has a first hinge point and a second hinge point arranged at a front-to-back spacing, the tail plate is located behind the seat plate, the tail plate has a connecting plate extending forward, the upper end of the connecting rod is hinged to the first hinge point, the lower end of the connecting rod is hinged to the front end of the connecting plate, a third hinge point, a fourth hinge point and a fifth hinge point are arranged on the connecting seat, the third and fourth hinge points are arranged at a vertical spacing, the fifth hinge point is located at the first hinge point and the fourth hinge point is located at the second hinge point, and the fifth hinge point is located at the third hinge point and the fourth hinge point is located at the third hinge point and the fifth hinge point is located at the fifth hinge point. 3. At the rear between the third and fourth hinge points, the third hinge point is hinged to the seat plate, the fourth hinge point is hinged to the locking seat, and the fifth hinge point is hinged to the positioning piece. An extension portion and a positioning portion are extended from the bottom of the positioning piece. The elastic component includes a first connecting head, a second connecting head and a spring. The first connecting head is arranged on the locking seat and is located in front of the positioning piece. The second connecting head is arranged at the front end of the extension portion. The two ends of the spring act on the first connecting head and the second connecting head respectively. The rear end of the second connecting head acts on the extension portion. A positioning platform is provided on the locking seat. The positioning portion and the positioning platform limit each other to limit the adjustment angle of the tail plate.

[0008] As a preferred solution, a guide plate is provided on the locking seat, which is located behind the positioning platform and on the lower side of the extension part. The front side surface of the guide plate has an elastic adjustment surface that extends obliquely downward from the back to the front or extends downward in an arc, and the extension part is movably provided on the elastic adjustment surface.

[0009] As a preferred solution, the positioning platform is provided with several step surfaces arranged front and back, the front step surface is higher than the adjacent rear step surface, and the positioning platform can be movably arranged on the locking seat front and back so that different step surfaces are adapted to the positioning part.

[0010] As a preferred solution, a cam is provided on the locking seat, and the cam is connected to a pull wire. Pulling the pull wire causes the cam to rotate, thereby pushing the positioning platform to translate.

[0011] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that it mainly realizes the angle adjustment of the backrest by using the first and second hinge points and the connecting plate to form a four-link structure through the design of various components. The positioning platform, the positioning member and the elastic component are arranged to realize the position limitation of the backrest angle, thereby ensuring the use of the supporting force of the backrest, thereby improving the user's experience when leaning back, having good usability and a wide range of applications.

[0012] In addition, the setting of the guide plate utilizes the displacement of the extension part on the elastic force adjustment surface to adjust the compression degree of the elastic part, thereby adjusting the support strength of the backrest and the user's back, thereby improving the user's experience when leaning back. At the same time, the setting of multiple step surfaces can realize the backrest angle limit of multiple gears of the tailgate, thereby meeting the usage needs of different users.

[0013] In order to more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a side view of an embodiment of the present utility model;

[0015] Figure 2 It is a cross-sectional view of an embodiment of the present utility model;

[0016] Figure 3 It is an exploded view of an embodiment of the present utility model.

[0017] Description of the accompanying drawings:

[0018] 11. Seat plate 12. Tail plate

[0019] 121, connecting plate 13, locking seat

[0020] 131, first hinge point 132, second hinge point

[0021] 133, cam 14, connecting rod

[0022] 15. Connecting seat 151, third hinge point

[0023] 152, fourth hinge point 153, fifth hinge point

[0024] 16. Positioning member 161, extension

[0025] 162, positioning portion 17, elastic component

[0026] 171, first connector 172, second connector

[0027] 18. Positioning platform 181. Step surface

[0028] 19. Guide plate 191. Elastic force adjustment surface. DETAILED DESCRIPTION

[0029] Please refer to Figures 1 to 3 As shown, it shows the specific structure of an embodiment of the present utility model.

[0030] A seat chassis structure includes a seat plate 11, a tail plate 12, a locking seat 13, a connecting rod 14, a connecting seat 15, a positioning member 16, and an elastic component 17. The locking seat 13, the connecting rod 14, the connecting seat 15, the positioning member 16, and the elastic component 17 are all located below the seat plate 11.

[0031] The locking seat 13 is provided with a first hinge point 131 and a second hinge point 132 arranged at a front-to-rear spacing. The tail plate 12 is located behind the seat plate 11. The tail plate 12 has a connecting plate 121 extending forward. The upper end of the connecting rod 14 is hinged to the first hinge point 131, and the lower end of the connecting rod 14 is hinged to the front end of the connecting plate 121. The connecting seat 15 is provided with a third hinge point 151, a fourth hinge point 152 and a fifth hinge point 153. The third and fourth hinge points are arranged at a vertical spacing. The fifth hinge point 153 is located behind the third and fourth hinge points. The third hinge point 151 is hinged to the lower end of the seat plate 11, the fourth hinge point 152 is hinged to the locking seat 13, and the fifth hinge point 153 is hinged to the positioning member 16. The bottom of the positioning member 16 is extended with an extension portion 161 and a positioning portion 162;

[0032] The elastic component 17 includes a first connecting head 171, a second connecting head 172 and a spring (not shown in the figure). The first connecting head 171 is arranged on the locking seat 13 and is located in front of the positioning member 16. The second connecting head 172 is arranged at the front end of the extension portion 161. The two ends of the spring act on the first connecting head 171 and the second connecting head 172 respectively, and the rear end of the second connecting head 172 acts on the extension portion 161. A positioning platform 18 is provided on the locking seat 13. The positioning portion 162 and the positioning platform 18 limit each other to limit the adjustment angle of the tail board. In this way, through the design of each component, a four-link structure is formed by utilizing the first and second hinge points and the connecting plate to realize the angle adjustment of the backrest. The arrangement of the positioning platform, the positioning member and the elastic component is coordinated to realize the limitation of the backrest angle, thereby ensuring the use of the supporting force of the backrest, thereby improving the user's experience effect when leaning on the backrest, with good usability and a wide range of applications.

[0033] In addition, the positioning platform 18 is provided with several stepped surfaces 181 arranged front to back, and the front stepped surface 181 is higher than the adjacent rear stepped surface 181. The positioning platform 18 can be movably arranged on the locking seat 13 front and back so that different step surfaces are adapted to the positioning portion; specifically, a cam 133 is provided on the locking seat 13, and the cam 133 is connected to a pull wire. Pulling the pull wire causes the cam to rotate, thereby pushing the positioning platform to translate. In this way, the setting of multiple step surfaces can realize the backrest angle limit of multiple gears of the tailgate, thereby meeting the usage needs of different users.

[0034] In addition, a guide plate 19 is provided on the locking seat 13, and the guide plate 19 is located behind the positioning platform 18 and on the lower side of the extension portion 161. The front side of the guide plate 19 has an elastic adjustment surface 191 extending obliquely downward from the back to the front or extending downward in an arc shape. The extension portion 161 is movably provided on the elastic adjustment surface 191; preferably, a roller is provided on the extension portion 161, and the rear end of the second connecting head 172 is hinged on the roller, and the roller contacts the elastic adjustment surface 191, and the The locking seat 13 is provided with a rod body extending left and right, and the two ends of the rod body are hinged to the locking seat 13. The front end of the first connecting head 171 is provided on the rod body, and the rod body is connected to a control line. The control line is pulled to select the elastic component so that the second connecting head rests on different positions on the elastic force adjustment surface, thereby adjusting the backrest force; in this way, the setting of the guide plate utilizes the displacement of the extension part on the elastic force adjustment surface to adjust the compression degree of the elastic part, thereby adjusting the support strength of the backrest and the user's back, thereby improving the user's experience when leaning back.

[0035] The design focus of the utility model is that it mainly realizes the angle adjustment of the backrest by using the first and second hinge points and the connecting plate to form a four-bar structure through the design of various components. The positioning platform, the positioning member and the elastic component are arranged to realize the position limitation of the backrest angle, thereby ensuring the support force of the backrest, thereby improving the user's experience when leaning back, having good usability and a wide range of applications.

[0036] In addition, the setting of the guide plate utilizes the displacement of the extension part on the elastic force adjustment surface to adjust the compression degree of the elastic part, thereby adjusting the support strength of the backrest and the user's back, thereby improving the user's experience when leaning back. At the same time, the setting of multiple step surfaces can realize the backrest angle limit of multiple gears of the tailgate, thereby meeting the usage needs of different users.

[0037] The above description is merely a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A seat chassis structure, characterized in that: The invention comprises a seat plate, a tail plate, a locking seat, a connecting rod, a connecting seat, a positioning piece and an elastic component, wherein the locking seat, the connecting rod, the connecting seat, the positioning piece and the elastic component are all located below the seat plate, and the locking seat has a first hinge point and a second hinge point arranged at a front-back spacing, the tail plate is located behind the seat plate, the tail plate has a connecting plate extending forward, the upper end of the connecting rod is hinged to the first hinge point, the lower end of the connecting rod is hinged to the front end of the connecting plate, a third hinge point, a fourth hinge point and a fifth hinge point are arranged on the connecting seat, the third and fourth hinge points are arranged at a vertical spacing, and the fifth hinge point is located between the third and fourth hinge points. At the rear between the contacts, the third hinge point is hinged to the seat plate, the fourth hinge point is hinged to the locking seat, and the fifth hinge point is hinged to the positioning piece. An extension portion and a positioning portion are extended from the bottom of the positioning piece. The elastic component includes a first connecting head, a second connecting head and a spring. The first connecting head is arranged on the locking seat and is located in front of the positioning piece. The second connecting head is arranged at the front end of the extension portion. The two ends of the spring act on the first connecting head and the second connecting head respectively. The rear end of the second connecting head acts on the extension portion. A positioning platform is provided on the locking seat. The positioning portion and the positioning platform limit each other to limit the adjustment angle of the tail plate.

2. The seat chassis structure according to claim 1, characterized in that: A guide plate is provided on the locking seat, and the guide plate is located behind the positioning platform and on the lower side of the extension part. The front side surface of the guide plate has an elastic adjustment surface extending obliquely downward from the back to the front or extending downward in an arc shape. The extension part is movably provided on the elastic adjustment surface.

3. The seat chassis structure according to claim 1, characterized in that: The positioning platform is provided with a plurality of front-to-back stepped surfaces, the front stepped surface is higher than the adjacent rear stepped surface, and the positioning platform can be movably arranged on the locking seat to enable different step surfaces to adapt to the positioning portion.

4. The seat chassis structure according to claim 3, characterized in that: The locking seat is provided with a cam, and the cam is connected to a pull wire. Pulling the pull wire causes the cam to rotate, thereby pushing the positioning platform to translate.

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