Seat

Abstract

The utility model discloses a seat. The seat comprises a seat back and a seat cushion, the chair seat assembly comprises a seat supporting piece, the seat supporting piece is of a box-shaped structure with an opening in the rear side, and a containing cavity is formed in the hollow portion of the seat supporting piece; the lower end of the back bracket is hinged to the seat supporting piece and can rotate back and forth relative to the seat supporting piece; one end of the back supporting piece is rotationally connected to the back support, and the chair back is installed on the back supporting piece; the movable assembly comprises a seat connecting rod, a back connecting rod and a guide mechanism, one end of the back connecting rod is hinged to the other end of the back supporting piece, the lower end of the seat connecting rod penetrates into the containing cavity and is hinged to the seat supporting piece, and the upper end of the seat connecting rod is hinged to the other end of the back connecting rod; the guide groove is formed in one of the seat connecting rod and the back bracket, and the guide pin is arranged on the other one of the seat connecting rod and the back bracket; when the back support rotates back and forth, the rotating direction of the back supporting piece is opposite to the rotating direction of the back support, and therefore the posture of the chair back is not changed.

Description

Technical Field

[0001] The utility model relates to the technical field of seats, and particularly relates to an ergonomic seat. Background Art

[0002] Seats are commonly used sitting tools in people's daily life. Generally, the backrest and seat cushion of a seat are relatively fixed. However, for users of different body types and ages, there are more or less differences in the seat depth. When different users use the same seat, there may be a gap between their backs and the backrest, resulting in the user's back not being effectively supported. After sitting for a long time, it is easy to have soreness in the waist and even cause lumbar spine diseases.

[0003] To solve the above problems, the prior art provides a backrest structure and a seat (application number: CN217524375U), including a main body, a frame, a connecting part and a cushion; the frame is connected to the main body, the frame is connected to the main body through the connecting part, the connecting part has elasticity, and the connecting part can expand and contract relative to the main body; the cushion is arranged on the frame. When the connecting part is pressed, it will drive the frame to automatically adjust according to the pressure exerted on it by the user, so as to adapt to different users.

[0004] However, the above solution has the following problems. Since the position of the frame is adjusted through the elasticity of the connecting part, the deformation direction of the connecting part is uncertain. When the frame is adjusted in position before and after being pressed, its angle is prone to tilt relative to the initial position, so that the frame cannot be fixed at an angle that fits the user's back during the adjustment process, resulting in a relatively uncomfortable sitting experience; moreover, if the user's weight is relatively light, the pressure exerted on the connecting part may not be sufficient to generate enough deformation, resulting in the position of the frame after adjustment not being suitable for the user, or even the frame may not be able to adjust its position. Summary of the Invention

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a seat. By hinging a back support, a back support member, a back connecting rod, a seat support member and a seat connecting rod to form a five-link mechanism, when the seat support member slides up and down relative to the seat support member, the upper and lower ends of the back support member are respectively pushed by the back support and the back connecting rod, so that the backrest connected to the back support member maintains a constant posture during the adjustment process and moves forward to fit the user's back; regardless of the length of the distance that the user adjusts the backrest, the backrest can always maintain an angle that fits the user's back, providing a comfortable sitting experience; and the front and back position of the backrest is adjusted through the five-link mechanism, and the adjustment operation does not depend on the user's weight and can be freely adjusted according to the user's own situation.

[0006] The solution of the utility model is realized as follows:

[0007] The present application provides a seat, comprising:

[0008] A chair back, used to support the user's back;

[0009] A chair seat assembly includes a seat support member, the seat support member is configured to connect to a seat cushion, the seat support member is a boxed structure with an opening at the rear side, and a hollow portion thereof forms a receiving cavity;

[0010] A back support, the lower end of which is hinged to the seat support and can rotate forward and backward relative to the seat support;

[0011] A back support, one end of which is rotatably connected to the back bracket, and the chair back is mounted on the back support;

[0012] The movable assembly includes a seat connecting rod, a back connecting rod and a guide mechanism, one end of the back connecting rod is hinged to the other end of the back support, the lower end of the seat connecting rod penetrates into the accommodating cavity and is hinged to the seat support, the upper end of the seat connecting rod is hinged to the other end of the back connecting rod, the guide mechanism is arranged between the seat connecting rod and the back support, the guide mechanism includes a guide groove and a guide pin matched with the guide groove, the guide groove is arranged on one of the seat connecting rod and the back support, and the guide pin is arranged on the other of the seat connecting rod and the back support;

[0013] During the forward and backward rotation of the back support, the seat connecting rod and the back connecting rod are linked to make the back connecting rod push and pull the back support member forward and backward, so that the rotation direction of the back support member is opposite to the rotation direction of the back support, thereby keeping the posture of the chair back unchanged.

[0014] Furthermore, an elastic member is provided between the seat support and the back support, one end of the elastic member is connected to the seat support, and the other end acts on the movable component or the back support, so that the back support always has a tendency to rotate forward relative to the seat support. The chair back can automatically move forward driven by the back support until it fits the user's back, without the need to manually adjust the position of the chair back, which is more convenient to use; and the elastic force of the elastic member enables the chair back to provide elastic support for the user, making the use experience more comfortable.

[0015] Furthermore, the back support includes a hinged portion at the lower end, the hinged portion is hinged to the seat support, the hinged portion protrudes toward the seat support with a rotating portion, and a connecting pin is transversely arranged on the rotating portion; an elastic member is arranged in the accommodating cavity, one end of the elastic member is hinged to the seat support, and the other end is hinged to the connecting pin, and the elastic member applies a pulling force to the rotating portion, so that the back support is driven by the rotating portion and always has a tendency to rotate forward. Through the principle of lever, the pulling force applied by the elastic member is converted into the rotation of the back support, and the structure is simple and the operation is convenient.

[0016] Further, the elastic member is inclined, with the inclination direction from front to back and from low to high. When the elastic member pushes against the connecting pin, the elastic member can apply an upward and oblique force to the connecting pin, making the rotation of the back bracket smoother.

[0017] Further, the guide groove is arranged on the back bracket in the vertical direction. The seat connecting rod and the back connecting rod are both hinged to the guide pin. An elastic member is arranged in the accommodating cavity. One end of the elastic member is hinged to the seat support member, and the other end is hinged to the guide pin. The elastic member applies a thrust force to the guide pin, making the back connecting rod always have a tendency to slide upward and push the back support member forward, thereby driving the backrest to always have a tendency to protrude forward. Thus, the elastic member acts on the movable assembly and drives the backrest to automatically protrude forward, not only enabling the backrest to automatically fit the user's back, but also providing elastic support for the user.

[0018] Further, the seat connecting rod is a curved rod, and the middle part of the seat connecting rod is bent downward, so that when the back bracket rotates backward, the seat connecting rod can smoothly slide in the guide groove along the arc direction.

[0019] Further, the back bracket is of a bent structure, and the upper end of the back bracket is bent forward and upward. When the back bracket rotates forward, the upper end of the back bracket can protrude forward a longer distance, so that the distances by which the upper and lower ends of the back support member protrude forward are the same, thus ensuring that the posture of the backrest remains unchanged during movement.

[0020] For the seat provided in this application, by hinging the back bracket, the back support member, the back connecting rod, the seat support member, and the seat connecting rod to form a five-link mechanism with each other, when the seat support member drives the back bracket to rotate forward, the upper end of the back support member hinged to the back bracket is driven to protrude forward; at the same time, the seat connecting rod between the back bracket and the seat support member is squeezed and forced to slide upward along the guide groove, and drives the back connecting rod hinged to the upper end of the seat connecting rod to protrude forward, so that the lower end of the back support member hinged to the back connecting rod is also driven to protrude forward; thus, both the upper and lower ends of the back support member are subjected to a forward pushing force, and since the movable assembly slides upward along the guide groove, the distance by which the lower end of the back support member protrudes forward is longer. Relative to the back bracket, the back support member rotates in the opposite direction, so that the posture of the backrest connected to the back support member remains unchanged and the backrest moves forward and translates to fit the user's back; regardless of the length of the distance by which the user adjusts the movement of the backrest, the backrest can always maintain an angle that fits the user's back, providing a comfortable sitting experience; and by adjusting the front and back position of the backrest through the five-link mechanism, the adjustment operation does not depend on the user's weight and can be freely adjusted according to the user's own situation, with better practicability. Description of the Drawings

[0021] By reading the detailed description of the non-restrictive embodiments with reference to the following drawings, other features, purposes, and advantages of this application will become more obvious:

[0022] Figure 1 Schematic three - dimensional structure diagram of the seat provided by the embodiment of the present application;

[0023] Figure 2 Schematic cross - sectional structure diagram of the seat in the initial position provided by the embodiment of the present application;

[0024] Figure 3 Schematic cross - sectional structure diagram of the seat in the final position provided by the embodiment of the present application;

[0025] Figure 4 Schematic internal structure diagram of the seat provided by the embodiment of the present application;

[0026] Figure 5 Schematic three - dimensional structure diagram of the movable component provided by the embodiment of the present application.

[0027] Each reference numeral is: 1 - backrest, 2 - seat assembly, 210 - seat support, 211 - accommodation cavity, 212 - ear plate, 220 - seat cushion, 3 - movable component, 310 - back bracket, 311 - hinge part, 312 - rotating part, 313 - guide groove, 320 - back support, 330 - back connecting rod, 340 - seat connecting rod, 341 - guide pin, 342 - connecting pin, 4 - elastic member. Detailed implementation manners

[0028] The present application will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than limiting the utility model. Additionally, it should be noted that for the convenience of description, only the parts related to the utility model are shown in the drawings.

[0029] Please refer to the attached Figures 1-5 , the embodiment of the present application provides a seat, including:

[0030] A backrest 1 for supporting the back of the user;

[0031] A seat assembly 2, including a seat support 210, the seat support 210 is configured to connect the seat cushion 220, the seat support 210 is a box - shaped structure with an open back side, and its hollow part forms an accommodation cavity 211;

[0032] A back bracket 310, the lower end of the back bracket 310 is hinged to the seat support 210 and can rotate back and forth relative to the seat support 210;

[0033] A back support 320, one end of the back support 320 is rotatably connected to the back bracket 310, and the backrest 1 is installed on the back support 320;

[0034] The movable assembly 3 includes a seat connecting rod 340, a back connecting rod 330 and a guide mechanism, one end of the back connecting rod 330 is hinged to the other end of the back support member 320, the lower end of the seat connecting rod 340 penetrates the accommodating cavity 211 and is hinged to the seat support member 210, the upper end of the seat connecting rod 340 is hinged to the other end of the back connecting rod 330, the guide mechanism is arranged between the seat connecting rod 340 and the back support member 310, the guide mechanism includes a guide groove 313 and a guide pin 341 matched with the guide groove 313, the guide groove 313 is arranged on one of the seat connecting rod 340 and the back support member 310, and the guide pin 341 is arranged on the other of the seat connecting rod 340 and the back support member 310;

[0035] During the forward and backward rotation of the back bracket 310, the seat connecting rod 340 and the back connecting rod 330 are linked to make the back connecting rod 330 push and pull the back support member 320 forward and backward, so that the rotation direction of the back support member 320 is opposite to that of the back bracket 310, thereby keeping the posture of the chair back 1 unchanged.

[0036] In the present embodiment, preferably, the back support 310 is also a semi-open box-shaped structure, the guide groove 313 is arranged in the middle section of the back support 310 and is arranged along the length direction of the back support 310, and the guide pin 341 is arranged on the seat connecting rod 340; when the chair back 1 supports the back of the user and the back of the user presses the chair back 1, the back support 320 is pushed backward and drives the back support 2 to rotate backward; at the same time, the angle between the back support 320 and the seat support 210 becomes larger, so that the seat connecting rod 340 hinged between the back support 320 and the seat support 210 is pulled and forced to slide downward along the guide groove 313, and drives the back connecting rod 330 hinged at the upper end of the seat connecting rod 340 The back support 320 is moved backward, so that the lower end of the back support 320 hinged to the back connecting rod 330 is also driven to move backward; therefore, when the back support 320 is pushed backward, its lower end is also pulled backward, and because the movable component 3 slides upward along the guide groove 313, the lower end of the back support 320 moves backward for a longer distance, and the back support 320 rotates in the opposite direction relative to the back bracket 310, so that the posture of the chair back 1 connected to the back support 320 remains unchanged, and moves backward to fit the user's back; in summary, no matter how long the user adjusts the chair back 1 to move, the chair back 1 can always maintain an angle that fits the user's back, providing a comfortable sitting experience. In addition, the front and rear position of the chair back is adjusted through a five-link mechanism, and the adjustment operation does not depend on the user's weight, and can be freely adjusted according to the user's own situation, which is more practical.

[0037] A plurality of ear plates 212 protrude from the side wall of the back support 220 , and the back support 220 is screwed to the bottom of the seat cushion 220 through the ear plates 212 , so that the seat cushion 220 can be detachably arranged on the back support 220 , which is convenient for assembling the seat.

[0038] Among them, the backrest 1 is a curved surface structure protruding forward in the middle, making the structure of the backrest 1 better conform to the natural forward curvature of the human spine, so as to better fit the user's back and provide a more comfortable sitting experience for the user.

[0039] Please refer to the attached Figures 2-4 , in some embodiments of the present application, an elastic member 4 is provided between the seat support member 210 and the backrest support 310. One end of the elastic member 4 is connected to the seat support member 210, and the other end acts on the movable assembly 3 or the backrest support 310, so that the backrest support 310 always has a tendency to rotate forward relative to the seat support member 210.

[0040] In this embodiment, by providing the elastic member 4, when the user adjusts the sitting posture and the back moves forward, the backrest 1 can be automatically moved forward under the drive of the backrest support 310 until it fits the user's back, without manually adjusting the position of the backrest 1, which is more convenient to use; and when the user's back is supported by the backrest 1, the elastic force of the elastic member 4 enables the backrest 1 to provide elastic support for the user, and the use experience is more comfortable.

[0041] Please refer to the attached Figures 4-5 , in some embodiments of the present application, the backrest support 310 includes a hinge portion 311 located at the lower end. The hinge portion 311 is hinged to the seat support member 210. A rotating portion 312 protrudes from the hinge portion 311 toward the seat support member 210, and a connecting pin 342 is horizontally provided on the rotating portion 312; an elastic member 4 is provided in the accommodating cavity 211. One end of the elastic member 4 is hinged to the seat support member 210, and the other end is hinged to the connecting pin 342. The elastic member 4 applies a pulling force to the rotating portion 312, so that the backrest support 310 is driven by the rotating portion 312 and always has a tendency to rotate forward.

[0042] In this embodiment, the elastic member 4 is a tensile gas spring. By hinging the hinge portion 311 of the backrest support 310 to the seat support member 210 and hinging the protruding rotating portion 312 to the seat support member 210, the backrest support 310 forms a lever with the hinge portion 311 as the fulcrum, and the elastic member 4 acts on the rotating portion 312, and the rotating portion 312 is driven to rotate around the hinge portion 311, so that the upper end of the backrest support 310 can also rotate around the hinge portion 311 as the rotating portion 312 rotates. Thus, through the lever principle, the pulling force applied by the elastic member 4 is converted into the rotation of the backrest support 310, with a simple structure and convenient operation.

[0043] Please refer to the attached Figures 2-4, in some embodiments of the present application, the elastic member 4 is inclined, and the inclination direction is from front to back and from low to high. When the elastic member 4 pushes against the connecting pin 342, the elastic member 4 can apply a force obliquely upward to the connecting pin 342, which is more in line with the trajectory when the rotating part 312 rotates backward relative to the hinge part 311. Thus, when the elastic member 4 pushes against the connecting pin 342, the rotation of the backrest bracket 310 is smoother.

[0044] In some embodiments of the present application, the elastic member 4 can also be arranged at other positions. For example, the guiding groove 313 is arranged in the backrest bracket 310 in the vertical direction, and both the seat connecting rod 340 and the back connecting rod 330 are hinged to the guiding pin 341; an elastic member 4 is arranged in the accommodating cavity 211, one end of the elastic member 4 is hinged to the seat support member 210, and the other end is hinged to the guiding pin 341. The elastic member 4 applies a thrust force to the guiding pin 341, so that the back connecting rod 330 always has a tendency to slide upward and push the back support member 320 forward, and further drives the backrest 1 to always have a tendency to push forward. Thus, the elastic member 4 acts on the movable assembly 3 and drives the backrest 1 to automatically push forward, which not only enables the backrest 1 to automatically fit against the user's back, but also provides elastic support for the user.

[0045] Please refer to the appendix Figures 2-5 , in some embodiments of the present application, the seat connecting rod 340 is a curved rod, and the middle part of the seat connecting rod 340 is bent downward. When the backrest bracket 310 rotates backward, the seat connecting rod 340 can smoothly slide in the guiding groove 313 along the arc direction, avoiding the top end of the seat connecting rod 340 against the groove wall of the guiding groove 313 during the adjustment process, which causes the rotation of the backrest bracket 310 to be not smooth.

[0046] Please refer to the appendix Figures 1-3 , in some embodiments of the present application, the backrest bracket 310 is a bent structure, and the upper end of the backrest bracket 310 is bent forward and upward. When the backrest bracket 310 rotates forward, the upper end of the backrest bracket 310 can push forward a longer distance, so that the upper and lower ends of the back support member 320 push forward the same distance, thereby ensuring that the posture of the backrest 1 remains unchanged during the movement.

[0047] It should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. in the foregoing is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is more than three.

[0048] The above description is only the preferred embodiment of the present application and an explanation of the applied technical principle. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solution formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept of the utility model. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) disclosed in the present application that have similar functions.

Claims

1. A seat, characterized in that, include: A chair back (1), used to support the back of a user; A chair seat assembly (2) comprising a seat support (210), wherein the seat support (210) is configured to be connected to a seat cushion (220), and the seat support (210) is a boxed structure with an opening at the rear side, wherein a hollow portion thereof forms a receiving cavity (211); A back support (310), the lower end of the back support (310) being hinged to the seat support (210) and being able to rotate forward and backward relative to the seat support (210); A back support member (320), one end of the back support member (320) being rotatably connected to the back bracket (310), and the chair back (1) being mounted on the back support member (320); A movable assembly (3) comprises a seat connecting rod (340), a back connecting rod (330) and a guide mechanism, wherein one end of the back connecting rod (330) is hinged to the other end of the back support member (320), the lower end of the seat connecting rod (340) penetrates into the accommodating cavity (211) and is hinged to the seat support member (210), the upper end of the seat connecting rod (340) is hinged to the other end of the back connecting rod (330), the guide mechanism is arranged between the seat connecting rod (340) and the back support member (310), the guide mechanism comprises a guide groove (313) and a guide pin (341) matched with the guide groove (313), the guide groove (313) is arranged on one of the seat connecting rod (340) and the back support member (310), and the guide pin (341) is arranged on the other of the seat connecting rod (340) and the back support member (310); During the forward and backward rotation of the back support (310), the seat connecting rod (340) and the back connecting rod (330) are linked to each other, so that the back connecting rod (330) pushes and pulls the back support member (320) forward and backward, and the rotation direction of the back support member (320) is opposite to the rotation direction of the back support (310), thereby keeping the posture of the chair back (1) unchanged.

2. The seat according to claim 1, characterized in that, An elastic member (4) is provided between the seat support member (210) and the back support member (310); one end of the elastic member (4) is connected to the seat support member (210), and the other end acts on the movable component (3) or the back support member (310), so that the back support member (310) always has a tendency to rotate forward relative to the seat support member (210).

3. The seat according to claim 2, wherein, The back support (310) comprises a hinged portion (311) at a lower end, the hinged portion (311) being hinged to the seat support (210), the hinged portion (311) being provided with a rotating portion (312) protruding toward the seat support (210), the rotating portion (312) being laterally provided with a connecting pin (342); the elastic member (4) is provided in the accommodating cavity (211), one end of the elastic member (4) being hinged to the seat support (210), and the other end being hinged to the connecting pin (342), the elastic member (4) applying a pulling force to the rotating portion (312), so that the back support (310) is driven by the rotating portion (312) and always has a tendency to rotate forward.

4. The seat according to claim 3, characterized in that, The elastic member (4) is arranged tilted, and the tilting direction is from front to back and from low to high.

5. The seat according to claim 2, characterized in that, The guiding groove (313) is arranged on the back bracket (310) in the vertical direction, and both the seat connecting rod (340) and the back connecting rod (330) are hinged to the guiding pin (341); an elastic member (4) is arranged in the accommodating cavity (211), one end of the elastic member (4) is hinged to the seat support member (210), and the other end is hinged to the guiding pin (341). The elastic member (4) applies a thrust force to the guiding pin (341), so that the back connecting rod (330) always has a tendency to slide upward and push the back support member (320) forward, thereby driving the backrest (1) to always have a tendency to protrude forward.

6. The seat according to claim 1, characterized in that, The seat connecting rod (340) is a curved rod, and the middle part of the seat connecting rod (340) is bent downward.

7. The seat according to claim 1, characterized in that, The back bracket (310) is a bent structure, and the upper end of the back bracket (310) is bent forward and upward.

Images