Adjustment mechanism and seat having the same

Abstract

This utility model discloses an adjustment mechanism and a seat having the same. The adjustment mechanism includes a connecting base, a back connector, a support assembly, and a seat connector. The back connector is rotatably connected to the connecting base. One end of the support assembly along its length is rotatably connected to the back connector. The seat connector is movably connected to the connecting base, and the other end of the seat connector and the support assembly along their length are rotatably connected. The seat connector is configured to move upward and backward when the rear end of the back connector rotates downward relative to the front end. The greater the rotation angle of the back connector, the greater the supporting force of the support assembly on the seat connector. According to this utility model's adjustment mechanism, the problem of insufficient support force in the seat connector when the rear end of the back connector rotates downward is effectively compensated for, ensuring that the user receives stable and appropriate support throughout the entire leaning process.

Description

Technical Field

[0001] This utility model mainly relates to the field of seat adjustment technology, and in particular to an adjustment mechanism and a seat having the same. Background Technology

[0002] In existing technologies, self-supporting chassis seats exhibit significant mechanical performance defects in practical use. In the lower half of the backrest plate's rotational movement, as the user's tilt angle gradually increases, the support provided by the seat noticeably decreases compared to the upper half. This uneven support means the user cannot obtain continuous and stable support while leaning back, greatly reducing seating comfort. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an adjustment mechanism that effectively compensates for the insufficient support force of the seat connection assembly when the rear end of the back connector rotates downwards, ensuring that the user receives stable and appropriate support force throughout the entire leaning process.

[0004] This utility model also proposes a seat, which includes the above-mentioned adjustment mechanism.

[0005] The adjustment mechanism according to an embodiment of the present invention includes a connecting base, a back connector, a support assembly, and a seat connector assembly. The back connector is rotatably connected to the connecting base. One end of the support assembly along its length is rotatably connected to the back connector. The seat connector assembly is movably connected to the connecting base, and the other end of the seat connector assembly and the support assembly along their lengths are rotatably connected. The seat connector assembly is configured such that when the rear end of the back connector rotates downward relative to the front end, the seat connector assembly moves upward and backward. Furthermore, the greater the rotation angle of the back connector, the greater the supporting force of the support assembly on the seat connector assembly.

[0006] According to the adjustment mechanism of this utility model embodiment, the seat connecting assembly moves upward and backward when the rear end of the back connector rotates downward relative to the front end. The greater the rotation angle of the back connector, the greater the supporting force of the support assembly on the seat connecting assembly. This gradually increases the supporting force of the seat cushion on the user when the user leans back against the backrest, and increases the reaction force generated by the user's leg lifting. As a result, the pressure of the backrest on the human body increases, and the user feels a greater back thrust. This effectively compensates for the problem of insufficient support force of the seat connecting assembly when the rear end of the back connector rotates downward, ensuring that the user can obtain stable and appropriate support force throughout the entire leaning process.

[0007] In some embodiments of this utility model, the support assembly includes: a mounting base, one end of which is rotatably connected to the back connector and the other end of which is rotatably connected to the seat connector assembly; and an elastic member disposed on the mounting base.

[0008] In some embodiments of this utility model, the mounting base includes: a first base, which is rotatably connected to the back connector, the first base having a first guide post, and a guide hole at the end of the first guide post away from the first base, the guide hole extending along the axial direction of the first guide post; and a second base, which is rotatably connected to the seat connector assembly, the second base having a second guide post, the end of the second guide post away from the second base extending into the guide hole, the elastic member being sleeved around the first guide post and the second guide post, and the second base being configured to move toward the direction closer to the first base when the rear end of the back connector rotates downward relative to the front end.

[0009] In some embodiments of this utility model, there are multiple elastic elements, and both the first guide post and the second guide post are multiple corresponding to the elastic elements, and the multiple elastic elements are spaced apart along the left-right direction.

[0010] In some embodiments of this utility model, the elastic element is a compression spring.

[0011] In some embodiments of the present invention, the first adjustment component further includes: a first adjustment component disposed on the seat connection component, used to adjust the supporting force of the elastic member on the seat connection component.

[0012] In some embodiments of this utility model, the first adjustment component includes: a handle rotatably disposed on the seat connection component; a pressure plate disposed at the front end of the elastic member and movable in the front-back direction; and a transmission component for converting the rotation of the handle into the movement of the pressure plate in the front-back direction.

[0013] In some embodiments of this utility model, the transmission assembly includes: a first bevel gear, wherein the support assembly and the seat connection assembly are rotatably connected via a first rotating shaft, the first rotating shaft extending in a front-rear direction, the first bevel gear being fixedly connected to the first rotating shaft and rotating synchronously, and the handle driving the first rotating shaft to rotate; a second bevel gear, the second bevel gear meshing with the first bevel gear; a screw, the screw being fixedly connected to the second bevel gear and rotating synchronously, the screw extending in a front-rear direction; and a nut, the nut being fixedly connected to the pressure plate, the nut being sleeved on the screw and used to convert the rotation of the screw into the movement of the nut along the axial direction of the screw.

[0014] In some embodiments of this utility model, the transmission assembly further includes: a first gear pair, the first gear pair including a driving gear and a driven gear, the driving gear meshing with the driven gear, the driving gear being fixedly connected to the handle and rotating synchronously, the driven gear being fixedly connected to the first rotating shaft and rotating synchronously; a gearbox body, the gearbox body being fixedly mounted on the seat connection assembly, the gearbox body defining a receiving cavity, the first gear pair being disposed within the receiving cavity, and at least a portion of the handle and the first rotating shaft being rotatably disposed within the receiving cavity.

[0015] The seat according to an embodiment of the present invention includes the above-described adjustment mechanism.

[0016] According to the embodiment of the present invention, the seat connecting assembly moves upward and backward when the rear end of the back connector rotates downward relative to the front end. The greater the rotation angle of the back connector, the greater the supporting force of the support assembly on the seat connecting assembly. This gradually increases the supporting force of the seat cushion on the user when the user leans back against the backrest, and increases the reaction force generated by the user's leg lifting. As a result, the pressure of the backrest on the human body increases, and the user feels a greater back thrust. This effectively compensates for the problem of insufficient support force of the seat connecting assembly when the rear end of the back connector rotates downward, ensuring that the user can obtain stable and appropriate support force throughout the entire leaning process.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a perspective view of the adjustment mechanism according to an embodiment of the present utility model;

[0020] Figure 2This is a perspective view of the removal seat connection assembly of the adjustment mechanism according to an embodiment of the present utility model;

[0021] Figure 3 This is a top view of the removal seat connection assembly of the adjustment mechanism according to an embodiment of the present utility model;

[0022] Figure 4 This is a perspective view of the support component of the adjustment mechanism according to an embodiment of the present utility model;

[0023] Figure 5 This is a cross-sectional view of the support component of the adjustment mechanism according to an embodiment of the present utility model.

[0024] Figure label:

[0025] 100. Adjustment mechanism;

[0026] 10. Connecting base; 13. First linkage shaft; 14. Second slide groove;

[0027] 20. Back connector; 22. Third linkage shaft;

[0028] 30. Seat connection assembly; 33. First slide groove; 34. Second linkage shaft; 35. Third slide groove;

[0029] 40. Support assembly; 41. Mounting base; 411. First base; 4111. First guide post; 4112. Guide hole; 412. Second base; 4121. Second guide post; 42. Elastic element;

[0030] 50. First adjusting component; 51. Handle; 511. First rotating shaft; 52. Transmission component; 521. First bevel gear; 522. Second bevel gear; 523. Screw; 524. Nut; 525. First gear pair; 526. Driving gear; 527. Driven gear; 528. Gearbox body; 53. Pressure plate. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0032] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] The following is for reference. Figures 1-5 Description of the adjustment mechanism 100 according to an embodiment of the present utility model.

[0035] like Figure 1 and Figure 2 As shown, the adjustment mechanism 100 according to an embodiment of the present utility model includes a connecting base 10, a back connector 20, a support assembly 40, and a seat connecting assembly 30.

[0036] like Figure 1 and Figure 2 As shown, the back connector 20 is rotatably connected to the connecting base 10. When the adjustment mechanism 100 is used for the seat, the back connector 20 can be connected to the back of the seat. When the user leans back against the back, the back connector 20 can rotate relative to the connecting base 10 to meet the user's need to recline and rest.

[0037] like Figure 1 and Figure 2 As shown, the length direction of the support component 40 (e.g.) Figure 1One end of the seat connection assembly 30 (shown in the front-to-back direction) is rotatably connected to the back connector 20, the seat connection assembly 30 is movably connected to the connecting base 10, and the other end of the seat connection assembly 30 and the support assembly 40 are rotatably connected in the longitudinal direction. The seat connection assembly 30 is configured to move upward and backward when the rear end of the back connector 20 rotates downward relative to the front end (upward and downward reference). Figure 1 (As shown in the up-down direction), and the greater the rotation angle of the back connector 20, the greater the supporting force of the support assembly 40 on the seat connector 30. The seat connector 30 can be connected to the seat cushion, and the connecting base 10 can be connected to the seat's support legs.

[0038] Understandably, when a user leans back, the backrest connector 20 is under pressure, causing its rear end to rotate downwards relative to the front end. Through mechanical transmission between the seat connector 30, the backrest connector 20, and the connecting base 10, the seat connector 30 moves upwards and backwards. When the user is using the chair for work, the seat connector 30 moves the seat cushion upwards and backwards, maintaining the user's line of sight level with the screen and reducing neck pressure. Simultaneously, the rising seat cushion adjusts posture, distributing the user's weight more evenly across the hips and thighs, preventing excessive localized pressure and improving comfort. Furthermore, when the user leans back, their center of gravity shifts backwards, and the rising seat cushion helps maintain balance, preventing the user from feeling like they are about to slide down, increasing stability, reducing the frequency of posture adjustments, and improving concentration.

[0039] During this process, the reaction force generated by the contact between the user's legs and the seat cushion provides sufficient support and feedback, enabling the transmission of back thrust, improving seat comfort, and enhancing the user experience.

[0040] In existing technologies, the user experience is often improved by increasing the back thrust. However, the increase in back thrust comes from the increase in pressure on the human body. Once the pressure of the seat cushion on the human body is increased, it is easy for the person's feet to leave the ground, which will destroy the stability and comfort of the seat during use, thereby affecting the user experience and bringing certain safety hazards.

[0041] In this application, the greater the rotation angle of the backrest connector 20, the greater the support force of the support component 40 on the seat connector 30. This can gradually increase the support force of the seat cushion on the user when the user leans back against the backrest, and increase the reaction force generated by the user's leg lifting. This increases the pressure of the backrest on the human body and the back thrust felt by the user. This effectively makes up for the problem of insufficient support force of the seat connector 30 when the rear end of the backrest connector 20 rotates downward, ensuring that the user can obtain stable and appropriate support force throughout the entire leaning process.

[0042] According to the first adjustment component 50 of this utility model embodiment, when the rear end of the back connector 20 rotates downward relative to the front end, the seat connecting component 30 moves upward and backward. The greater the rotation angle of the back connector 20, the greater the supporting force of the support component 40 on the seat connecting component 30. This gradually increases the supporting force of the seat cushion on the user when the user leans back against the backrest, and increases the reaction force generated by the user's leg lifting. As a result, the pressure of the backrest on the human body increases, and the user feels a greater back thrust. This effectively compensates for the problem of insufficient support force of the seat connecting component 30 when the rear end of the back connector 20 rotates downward, ensuring that the user can obtain stable and appropriate support force throughout the entire leaning process.

[0043] In some embodiments of this utility model, such as Figure 1 and Figure 4 As shown, the support assembly 40 includes a mounting base 41 and an elastic element 42, with the mounting base 41 extending along its length (e.g., along its length). Figure 1 One end of the elastic element (shown in the front-to-back direction) is rotatably connected to the back connector 20, and the other end is rotatably connected to the seat connector 30. The elastic element 42 is mounted on the mounting base 41, which provides a mounting position for the elastic element 42, enabling indirect cooperation between the elastic element 42 and the back connector 20 and the seat connector 30, thus assembling the elastic element 42. Furthermore, the mounting base 41 can limit the position of the elastic element 42, making its position more reliable.

[0044] In some embodiments of this utility model, such as Figure 4 and Figure 5 As shown, the mounting base 41 includes a first base 411 and a second base 412. The first base 411 is rotatably connected to the back connector 20. A first guide post 4111 is provided on the first base 4111. A guide hole 4112 is provided at the end of the first guide post 4111 away from the first base 411. The guide hole 4112 is along the axial direction of the first guide post 4111 (e.g., ...). Figure 1 Extending in the front-to-back direction (as shown), the second base 412 is rotatably connected to the seat connecting assembly 30. The second base 412 is provided with a second guide post 4121. The end of the second guide post 4121 away from the second base 412 extends into the guide hole 4112. The elastic member 42 is sleeved on the first guide post 4111 and the second guide post 4121. The second base 412 is configured to move toward the direction closer to the first base 411 when the rear end of the back connecting member 20 rotates downward relative to the front end.

[0045] Understandably, when the user leans back against the backrest, the rear end of the backrest connector 20 rotates downward relative to the front end. The first base 411 rotates downward with the backrest connector 20, and the seat connecting assembly 30 moves the seat cushion upward and backward. The second base 412 also moves upward and backward with the seat connecting assembly 30. The second base 412 moves towards the first base 411, and the elastic element 42 is sleeved on the first guide post 4111 and the second guide post 4121. The total axial length of the first guide post 4111 and the second guide post 4121 decreases, resulting in compression of the elastic element 42. This relatively easily increases the supporting force of the support assembly 40 on the seat connecting assembly 30, increasing the reaction force generated by the user's leg lifting. Consequently, the pressure of the backrest on the human body increases, and the user experiences a greater back thrust. This effectively compensates for the insufficient supporting force of the seat connecting assembly 30 when the rear end of the backrest connector 20 rotates downward, ensuring that the user receives stable and appropriate support throughout the entire leaning process.

[0046] Meanwhile, when the second base 412 moves toward the direction of approaching the first base 411, the second guide post 4121 is located in the guide hole 4112 and moves toward the direction of approaching the first base 411. The guide hole 4112 can provide a limit for the movement of the second guide post 4121, making the relative movement between the second base 412 and the first base 411 more reliable.

[0047] In some embodiments of this utility model, there are multiple elastic elements 42, and multiple first guide posts 4111 and second guide posts 4121 corresponding to the elastic elements 42. The multiple elastic elements 42 are arranged along the left-right direction (e.g., Figure 1 The left and right directions are spaced apart, so that the seat connection assembly 30 is supported by the elastic element 42 at multiple points along the left and right directions, so that the support force of the support assembly 40 on the seat connection assembly 30 in the left and right directions is relatively uniform.

[0048] In some embodiments of this utility model, the elastic element 42 is a compression spring. The compression spring can effectively store energy when compressed and has minimal energy loss when released. Moreover, the compression spring is usually made of metal wire (such as steel or stainless steel) spirally wound, and the manufacturing process is mature, easy to mass-produce, and has low cost.

[0049] In some embodiments of this utility model, such as Figure 2 and Figure 3As shown, the adjustment mechanism 100 also includes a first adjustment component 50, which is disposed on the seat connection component 30 and is used to adjust the supporting force of the elastic member 42 on the seat connection component 30. It can be understood that the first adjustment component 50 can adjust the initial elastic force of the elastic member 42, allowing the elastic member 42 to adapt to users of different weights. When users of different weights use the seat and lean against the backrest, the elastic member 42 can increase the reaction force generated by the user's leg lifting, thus meeting the usage needs of users of different weights.

[0050] Furthermore, such as Figures 1-3 As shown, the first adjusting assembly 50 includes a handle 51, a pressure plate 53, and a transmission assembly 52. ​​The handle 51 is rotatably mounted on the seat connecting assembly 30, and the pressure plate 53 is located at the front end of the elastic member 42. The pressure plate 53 extends along the front-back direction (e.g., ...). Figure 1 The handle 51 (shown in the front-back direction) is movable, and the transmission assembly 52 is used to convert the rotation of the handle 51 into the movement of the pressure plate 53 in the front-back direction. When the handle 51 is rotated, the transmission assembly 52 converts the rotation of the handle 51 into the movement of the pressure plate 53 in the front-back direction. The pressure plate 53 can drive the elastic element 42 to move, thereby adjusting the initial compression of the elastic element 42, and ultimately adjusting the pressure of the backrest on the human body.

[0051] In this embodiment, the elastic element 42 is a compression spring. When the compression spring is compressed, the supporting force of the support assembly 40 on the seat connection assembly 30 increases.

[0052] Furthermore, such as Figures 1-3 As shown, the transmission assembly 52 includes a first bevel gear 521, a second bevel gear 522, a screw 523, and a nut 524. The support assembly 40 and the seat connection assembly 30 are rotatably connected via a first rotating shaft 511, which extends in the left-right direction. The first bevel gear 521 is fixedly connected to the first rotating shaft 511 and rotates synchronously. The handle 51 drives the first rotating shaft 511 to rotate. The second bevel gear 522 meshes with the first bevel gear 521. The screw 523 is fixedly connected to the second bevel gear 522 and rotates synchronously. The screw 523 extends in the front-back direction. The nut 524 is fixedly connected to the pressure plate 53 and is sleeved on the screw 523 to convert the rotation of the screw 523 into the movement of the nut 524 along the axial direction of the screw 523.

[0053] Understandably, when the user turns the handle 51, the handle 51 drives the first rotating shaft 511 to rotate, the first bevel gear 521 rotates synchronously with the first rotating shaft 511, the first bevel gear 521 meshes with the second bevel gear 522, the second bevel gear 522 rotates, driving the screw 523 to rotate, which is converted into the movement of the nut 524 along the axial direction of the screw 523, thereby realizing the movement of the pressure plate 53 in the front and back direction. The pressure plate 53 can drive the elastic element 42 to move, thereby adjusting the initial compression of the elastic element 42, and finally realizing the adjustment of the pressure of the backrest on the human body.

[0054] In some embodiments of this utility model, such as Figures 1-3 As shown, the transmission assembly 52 also includes a first gear pair 525 and a gearbox 528. The first gear pair 525 includes a driving gear 526 and a driven gear 527. The driving gear 526 meshes with the driven gear 527. The driving gear 526 is fixedly connected to the handle 51 and rotates synchronously. The driven gear 527 is fixedly connected to the first rotating shaft 511 and rotates synchronously. The number of teeth of the driving gear 526 and the driven gear 527 can be designed according to requirements. For example, if the number of teeth of the driving gear 526 is less than the number of teeth of the driven gear 527, the rotational speed of the driven gear 527 in the first gear pair 525 decreases and the torque increases; or, if the number of teeth of the driving gear 526 is more than the number of teeth of the driven gear 527, the rotational speed of the driven gear 527 in the first gear pair 525 increases and the torque decreases.

[0055] The gearbox 528 is fixedly mounted on the seat connection assembly 30. The gearbox 528 defines a receiving cavity, in which the first gear pair 525 is disposed. At least a portion of the handle 51 and the first rotating shaft 511 are rotatably disposed within the receiving cavity. The gearbox 528 protects the first gear pair 525 from damage caused by external dust or other contaminants. Furthermore, the gearbox 528 can contain lubricating oil to lubricate the first gear pair 525.

[0056] In some embodiments of this utility model, reference is made to the appendix. Figure 1 and attached Figure 2As shown, a first limiting structure and a second limiting structure are provided between the connecting base 10 and the seat connecting assembly 30. The first limiting structure is located behind the second limiting structure. The first limiting structure includes a first linkage shaft 13 and a first sliding groove 33. One of the first linkage shaft 13 and the first sliding groove 33 is located on the connecting base 10, and the other is located on the seat connecting assembly 30. The first linkage shaft 13 is movably inserted into the first sliding groove 33. The second limiting structure includes a second linkage shaft 34 and a second sliding groove 14. One of the second linkage shaft 34 and the second sliding groove 14 is located on the connecting base 10, and the other is located on the seat connecting assembly 30. The second linkage shaft 34 is movably inserted into the second sliding groove 14. In the direction from front to back, both the first sliding groove 33 and the second sliding groove 14 are inclined upward. The back connector 20 is used to drive the seat connecting assembly 30 to move upward when the rear end of the back connector 20 rotates downward relative to the front end.

[0057] Understandably, when the user leans back against the backrest, the rear end of the backrest connector 20 rotates downward relative to the front end. Driven by the backrest connector 20, the seat connection assembly 30 moves upward. Since the connecting base 10 is fixed, and both the first slide groove 33 and the second slide groove 14 tilt backward in the upward direction, the first linkage shaft 13 moves along the extension direction of the first slide groove 33, and the second linkage shaft 34 moves along the extension direction of the second slide groove 14. Therefore, with the cooperation of the first linkage shaft 13 and the first slide groove 33, and the cooperation of the second linkage shaft 34 and the second slide groove 14, the seat connection assembly 30 moves backward while moving upward, realizing the self-weight-bearing function of the seat, improving seat comfort, and enhancing the user experience.

[0058] It should be noted that, since the first limiting structure and the second limiting structure are spaced apart in the front-to-back direction, they can play a guiding role at two points spaced apart in the front-to-back direction between the connecting base 10 and the seat connecting assembly 30, which facilitates the movement of the seat connecting assembly 30 relative to the connecting base 10 and ensures the reliability and stability of the movement of the seat connecting assembly 30.

[0059] It is understood that one of the first linkage shaft 13 and the first sliding groove 33 is located on the connecting base 10, and the other is located on the seat connecting assembly 30. This can be either the first linkage shaft 13 being located on the connecting base 10 and the first sliding groove 33 being located on the seat connecting assembly 30, or the first linkage shaft 13 being located on the seat connecting assembly 30 and the first sliding groove 33 being located on the connecting base 10. Similarly, one of the second linkage shaft 34 and the second sliding groove 14 is located on the connecting base 10, and the other is located on the seat connecting assembly 30. This can be either the second linkage shaft 34 being located on the connecting base 10 and the second sliding groove 14 being located on the seat connecting assembly 30, or the second linkage shaft 34 being located on the seat connecting assembly 30 and the second sliding groove 14 being located on the connecting base 10.

[0060] In a specific example, see Appendix Figure 1 and attached Figure 2 As shown, the first linkage shaft 13 and the second slide groove 14 are disposed on the connecting base 10, and the first slide groove 33 and the second linkage shaft 34 are disposed on the seat connecting assembly 30, which makes the fit between the connecting base 10 and the seat connecting assembly 30 more stable and reliable. The back connector 20 has a first limit position and a second limit position, which are located at the two ends of the rotation angle range of the back connector 20, respectively. In the first limit position, the first linkage shaft 13 is located at the rear end of the first slide groove 33, and the second linkage shaft 34 is located at the front end of the second slide groove 14. In the second limit position, the first linkage shaft 13 is located at the front end of the first slide groove 33, and the second linkage shaft 34 is located at the rear end of the second slide groove 14, thereby preventing wobbling between the seat connecting assembly 30 and the connecting base 10 and ensuring the overall reliability and stability of the adjustment mechanism 100.

[0061] Of course, this utility model is not limited to this. A third limiting structure other than the first limiting structure and the second limiting structure can also be provided between the connecting base 10 and the seat connecting assembly 30. The third limiting structure can be multiple structures spaced apart from the first limiting structure and the second limiting structure. Each third limiting structure includes a fourth linkage shaft and a fourth sliding groove. One of the fourth linkage shaft and the fourth sliding groove is located on the connecting base 10 and the other is located on the seat connecting assembly 30. The fourth linkage shaft can be movably inserted into the fourth sliding groove. The setting of the third limiting structure can further play a guiding role and further ensure the reliability and stability of the movement of the seat connecting assembly 30.

[0062] Further, see Appendix Figure 1 and attached Figure 2 As shown, the angle between the extension direction of the first slide groove 33 and the horizontal direction is the first angle, and the angle between the extension direction of the second slide groove 14 and the horizontal direction is the second angle. The first angle is greater than the second angle. When the lengths of the first slide groove 33 and the second slide groove 14 are the same, the height of the first slide groove 33 in the vertical direction is greater than the height of the second slide groove 14 in the vertical direction. The first slide groove 33 is located behind the second slide groove 14, which allows the lifting height of the front end of the seat connecting assembly 30 to be lower than the lifting height of the rear end during the upward and backward movement of the seat connecting assembly 30. This prevents the seat from lifting the user too high and prevents the user's feet from leaving the ground, thereby ensuring the stability and comfort of the seat during use, reducing safety hazards during seat use, improving the practicality of the seat, and further improving the user experience.

[0063] It should be noted that by adjusting the lengths of the first slide rail 33 and the second slide rail 14, as well as the size of the first and second included angles, the absolute and relative heights of the front and rear ends of the seat connecting assembly 30 can be precisely controlled. This controls the height variation of the front and rear ends of the seat connecting assembly 30, preventing the user's feet from leaving the ground when leaning against the backrest, thus improving the comfort and stability of the seat. Furthermore, through the reasonable design of the first slide rail 33 and the second slide rail 14, it is possible to prevent the user from sliding forward due to excessive height difference between the front and rear ends of the seat connecting assembly 30, ensuring a good user experience.

[0064] In a further embodiment of this utility model, reference is made to the appendix. Figure 1 and attached Figure 2 As shown, the first linkage shaft 13 is disposed on the connecting base 10, and the first slide groove 33 is disposed on the seat connecting assembly 30. The back connector 20 and the connecting base 10 are rotatably connected through the first linkage shaft 13. It can be understood that by disposing of the first linkage shaft 13 at the rotation center of the back connector 20 and the connecting base 10, the first linkage shaft 13 can serve as both the rotation shaft of the back connector 20 and the connecting base 10 and the guide shaft that cooperates with the first slide groove 33. Compared with setting an additional rotation shaft to connect the back connector 20 and the connecting base 10, the number of parts of the adjustment mechanism 100 can be reduced, the manufacturing cost of the adjustment mechanism 100 can be reduced, the assembly process of the adjustment mechanism 100 can be simplified, the assembly cost of the adjustment mechanism 100 can be reduced, and the production efficiency of the adjustment mechanism 100 can be improved.

[0065] In some embodiments of this utility model, reference is made to the appendix. Figure 1 and attached Figure 2 As shown, a drive structure is provided between the seat connecting assembly 30 and the back connecting member 20. The drive structure includes a third linkage shaft 22 and a third slide groove 35. The third linkage shaft 22 is located on the back connecting member 20, and the third slide groove 35 is located on the seat connecting assembly 30. The third linkage shaft 22 is movably inserted into the third slide groove 35. In the direction from front to back, the third slide groove 35 is inclined downward. It can be understood that the third linkage shaft 22 is located in front of the first linkage shaft 13. When the user leans back against the backrest, the rear end of the back connecting member 20 rotates downward relative to the front end, and the third linkage shaft 22 moves upward. Since the third slide groove 35 is inclined forward in the direction from bottom to top, through the cooperation of the third linkage shaft 22 and the third slide groove 35, the seat connecting assembly 30 can be driven to move upward and backward when the third linkage shaft 22 moves upward, realizing the self-weight function of the seat, improving seat comfort, and enhancing the user experience.

[0066] It should be noted that the shape and extension direction of the third slide 35 are a combination of the shape and extension direction of the first slide 33 and the second slide 14. By reasonably designing the length-to-height ratio and shape of the third slide 35, the rotation angle of the back connector 20 and the lifting height of the seat connector 30 can be precisely controlled.

[0067] In a further embodiment of this utility model, reference is made to the appendix. Figure 1 and attached Figure 2 As shown, the back connector 20 is located inside the connecting base 10, and the seat connecting assembly 30 is located outside the connecting base 10. The connecting base 10 is provided with a clearance groove, which is an arc-shaped groove with the rotation center of the back connector 20 as the center. The third linkage shaft 22 passes through the clearance groove. Since the connecting base 10 is located between the back connector 20 and the seat connecting assembly 30, during the rotation of the back connector 20, the third linkage shaft 22 makes a circular motion with the axis of the first linkage shaft 13 as the center. The shape of the clearance groove matches the movement trajectory of the third linkage shaft 22, which can avoid the third linkage shaft 22 and avoid affecting the normal drive of the third linkage shaft 22 to the seat connecting assembly 30. This ensures that when the rear end of the back connector 20 rotates downward relative to the front end, the seat connecting assembly 30 is driven to move upward and backward.

[0068] In a specific example, see Appendix Figure 1 and attached Figure 2 As shown, the back connector 20 is located inside the connecting base 10 and rotatably connected to the rear end of the connecting base 10. The seat connecting assembly 30 is located on the outside of the connecting base 10. The connecting base 10 has a second sliding groove 14 and a clearance groove on both sides along the left and right directions. The seat connecting assembly 30 has a first sliding groove 33 and a third sliding groove 35 on both sides along the left and right directions. The first linkage shaft 13, the second linkage shaft 34, and the third linkage shaft 22 all extend in the left and right directions. In the direction from front to back, the second linkage shaft 34, the third linkage shaft 22, and the first linkage shaft 34 extend in the left and right directions. The moving shafts 13 are arranged in sequence, and the first linkage shaft 13 is the rotation center of the back connector 20 and the connecting base 10. The first linkage shaft 13 passes through the back connector 20 and the connecting base 10 in the left and right direction and cooperates with the first slide groove 33 of the seat connecting assembly 30. The second linkage shaft 34 passes through the second slide groove 14 of the connecting base 10 in the left and right direction and is fixed on the seat connecting assembly 30. The third linkage shaft 22 passes through the back connector 20 in the left and right direction and cooperates with the clearance groove of the connecting base 10 and the third slide groove 35 of the seat connecting assembly 30.

[0069] The seat according to an embodiment of the present invention includes an adjustment mechanism 100.

[0070] The backrest connector 20 can connect to the backrest of the chair, the seat connector 30 can connect to the seat cushion, and the connecting base 10 can connect to the support legs of the chair. When the user leans back against the backrest, the backrest connector 20 is subjected to pressure, and the rear end of the backrest connector 20 rotates downward relative to the front end. Through mechanical transmission between the seat connector 30, the backrest connector 20, and the connecting base 10, the seat connector 30 can be driven to move upward and backward. When the user uses the chair for work, the seat connector 30 drives the seat cushion to move upward and backward, which can keep the user's line of sight aligned with the screen and reduce the user's neck pressure. At the same time, the seat cushion can be raised to adjust the sitting posture, allowing the user's weight to be more evenly distributed on the buttocks and thighs, avoiding excessive local pressure and improving comfort. Moreover, when the backrest is reclined, the body's center of gravity shifts backward, and the raised seat cushion may help the user maintain balance, prevent the user from feeling like they are about to slide down, increase stability, reduce the number of times the user needs to adjust their sitting posture, and improve concentration.

[0071] According to the embodiment of the present invention, the seat connecting assembly 30 moves upward and backward when the rear end of the back connector 20 rotates downward relative to the front end. The greater the rotation angle of the back connector 20, the greater the supporting force of the support assembly 40 on the seat connecting assembly 30. This gradually increases the supporting force of the seat cushion on the user when the user leans back against the backrest, and increases the reaction force generated by the user's leg lifting. As a result, the pressure of the backrest on the human body increases, and the user feels a greater back thrust. This effectively compensates for the problem of insufficient supporting force of the seat connecting assembly 30 when the rear end of the back connector 20 rotates downward, ensuring that the user can obtain stable and appropriate support throughout the entire leaning process.

[0072] The adjustment mechanism 100 and other components and operations of the seat according to the embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0073] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0074] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An adjustment mechanism, characterized in that, include: Connect the base; A back connector, which is rotatably connected to the connecting base; A support assembly, one end of which is rotatably connected to the back connector along its length; A seat connection assembly is movably connected to the connecting base, and the other end of the seat connection assembly and the support assembly are rotatably connected in the longitudinal direction; The seat connection assembly is configured such that when the rear end of the back connector rotates downward relative to the front end, the seat connection assembly moves upward and backward, and the greater the rotation angle of the back connector, the greater the supporting force of the support assembly on the seat connection assembly.

2. The adjusting mechanism according to claim 1, characterized in that, The support components include: Mounting base, one end of which is rotatably connected to the back connector and the other end of which is rotatably connected to the seat connector assembly; An elastic element is disposed on the mounting base.

3. The adjusting mechanism according to claim 2, characterized in that, The mounting base includes: A first base is rotatably connected to the back connector. A first guide post is provided on the first base. A guide hole is provided at the end of the first guide post away from the first base. The guide hole extends along the axial direction of the first guide post. The second base is rotatably connected to the seat connection assembly. The second base is provided with a second guide post. The end of the second guide post away from the second base extends into the guide hole. The elastic element is sleeved on the first guide post and the second guide post. The second base is configured to move toward the direction closer to the first base when the rear end of the back connector rotates downward relative to the front end.

4. The adjusting mechanism according to claim 3, characterized in that, There are multiple elastic elements, and there are multiple first guide posts and multiple second guide posts corresponding to the elastic elements. The multiple elastic elements are spaced apart in the left-right direction.

5. The adjusting mechanism according to claim 2, characterized in that, The elastic element is a compression spring.

6. The adjusting mechanism according to claim 2, characterized in that, Also includes: A first adjustment component is disposed on the seat connection component and is used to adjust the supporting force of the elastic element on the seat connection component.

7. The adjusting mechanism according to claim 6, characterized in that, The first adjustment component includes: A handle, which is rotatably mounted on the seat connection assembly; A pressure plate is disposed at the front end of the elastic member, and the pressure plate is movable in the front-back direction; A transmission assembly for converting the rotation of the handle into the movement of the pressure plate in the front-back direction.

8. The adjusting mechanism according to claim 7, characterized in that, The transmission assembly includes: The first bevel gear, the support assembly and the seat connection assembly are rotatably connected via a first rotating shaft, the first bevel gear is fixedly connected to the first rotating shaft and rotates synchronously, the first rotating shaft extends in the left and right direction, and the handle drives the first rotating shaft to rotate; The second bevel gear meshes with the first bevel gear; A screw, which is fixedly connected to the second bevel gear and rotates synchronously, and extends in the front-to-back direction; A nut, which is fixedly connected to the pressure plate, is sleeved on the screw and is used to convert the rotation of the screw into the movement of the nut along the axial direction of the screw.

9. The adjusting mechanism according to claim 8, characterized in that, The transmission assembly also includes: The first gear pair includes a driving gear and a driven gear. The driving gear meshes with the driven gear. The driving gear is fixedly connected to the handle and rotates synchronously. The driven gear is fixedly connected to the first rotating shaft and rotates synchronously. A gearbox body is fixed to the seat connection assembly, the gearbox body defines a receiving cavity, the first gear pair is disposed in the receiving cavity, and at least a portion of the handle and the first rotating shaft are rotatably disposed in the receiving cavity.

10. A type of seat, characterized in that, include: The adjusting mechanism according to any one of claims 1-9.

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