Adjusting mechanism and seat

Abstract

The utility model discloses an adjusting mechanism and a seat, and the adjusting mechanism comprises a mounting seat, a connecting seat, a locking piece and an elastic piece, the mounting seat comprises a first end, a second end, a combination part and a pushing part, and the combination part comprises a plurality of clamping parts; the connecting seat is in sliding fit with the mounting seat; a guide part is arranged on the connecting seat and comprises a first limiting end, a second limiting end and a bent part, a first section is formed between the first limiting end and the bent part, and a second section is formed between the second limiting end and the bent part; a clamping part and a sliding part are arranged on the locking piece, the clamping part faces the combination part to be combined with one of the clamping parts, and the sliding part is in sliding fit with the guide part so that the sliding piece can slide along the extending track of the guide part; the elastic piece is used for providing elastic stress applied to the locking piece. According to the utility model, a switch is not required to be operated, so that the operation process is simple and convenient, and the stability is better after the mounting seat and the connecting seat are adjusted in place.

Description

Technical Field

[0001] This utility model relates to the field of seating technology, specifically to an adjustment mechanism and a seat. Background Technology

[0002] To meet the diverse needs of users, existing study chairs, office chairs, gaming chairs, and other chairs typically have adjustable support components such as backrests, headrests, and lumbar supports mounted on the main body of the chair to accommodate different sitting postures and body shapes. However, adjusting these support components often requires operating switches, which is a relatively complex process and results in poor support stability. Utility Model Content

[0003] The purpose of this invention is to provide an adjustment mechanism and a seat that are simple to operate and can provide stable support.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] The adjusting mechanism includes a mounting base, a connecting base, a locking element, and an elastic element;

[0006] The mounting base includes a first end, a second end, a connecting portion located between the first end and the second end, and a pushing portion located at the end of the connecting portion near the second end. The connecting portion includes multiple locking portions arranged along a straight line L.

[0007] The connecting seat and the mounting seat are slidably fitted so that they can move relative to each other along a straight line L; the connecting seat is provided with a guide portion, which includes a first limiting end, a second limiting end, and a bent portion located between the first limiting end and the second limiting end. A first segment is formed between the first limiting end and the bent portion, extending from the bent portion along the straight line L toward the first end close to the mounting seat, and a second segment is formed between the second limiting end and the bent portion, extending from the bent portion toward the mounting seat.

[0008] The locking member is provided with a snap-fit ​​part and a sliding part. The snap-fit ​​part is provided facing the engagement part to engage with one of the snap-fit ​​parts to limit the degree of freedom of the locking member as the connecting seat moves toward the first end relative to the mounting seat. The sliding part slides with the guide part so that the sliding member can slide along the extension trajectory of the guide part.

[0009] The elastic element is used to provide an elastic stress applied to the locking element so that the locking element always has a tendency to move toward the mounting seat;

[0010] The first end of the mounting base is used to push the locking member when the locking member slides to the first end with the connecting base, so that the sliding part on the locking member slides along the first segment from the first limiting end toward the bending part. The pushing part is used to abut the locking member so that the sliding part slides from the second limiting end along the second segment toward the bending part. The second end of the mounting base is used to push the locking member when the locking member slides to the second end with the connecting base, so that the sliding part on the locking member slides along the first segment from the bending part toward the first limiting end.

[0011] Preferably, the guide part is a guide groove provided on the connecting seat, and the sliding part is a first pin fixed on the locking member and embedded in the guide groove.

[0012] Preferably, the connecting seat is provided with a guide groove, the extension direction of the guide groove is consistent with the straight line L, and the guide groove and the guide slide are staggered along the straight line L. The locking member is provided with a second pin, the second pin slides through the guide groove, and is configured to be able to rotate relative to the connecting seat in the guide groove so that the first pin can swing between the second limiting end and the bending part of the guide slide.

[0013] Preferably, a mounting groove is provided on the surface of the connecting seat facing the mounting seat, and a mounting wall is formed on the part of the connecting seat located on both sides of the mounting groove. Each mounting wall is provided with a guide groove and a guide slot. The two ends of the first pin protrude from the two sides of the locking member and pass into the two guide grooves, and the two ends of the second pin protrude from the two sides of the locking member and pass into the two guide slots.

[0014] Preferably, the mounting base has multiple protruding teeth on the surface facing the connecting base, and the multiple protruding teeth are arranged along a straight line L. The locking part is a locking groove formed between two adjacent protruding teeth. The protruding teeth include a guide slope facing the first end and a stop surface facing the second end. The stop surface is perpendicular to the straight line L. The locking part is a boss provided on the locking member and can be embedded in the locking groove to engage with the locking groove. The guide slope is used to press the boss towards the connecting base when the boss is placed in the locking groove and moves towards the second end so that the boss can disengage from the locking groove. The stop surface is used to stop the boss on the side facing the first end when the boss is placed in the locking groove.

[0015] Preferably, the boss includes a limiting surface facing the first end and a mating inclined surface facing the second end. The limiting surface is perpendicular to the straight line L. The pushing part is a support rib that is provided on the mounting base and protrudes towards the connecting seat. The mating inclined surface is used to contact and engage with the support rib when the boss moves towards the second end so that the support rib can push the mating inclined surface towards the connecting seat.

[0016] Preferably, the locking member is provided with a protruding rib extending toward the mounting seat; the first end is a limiting protrusion provided on the mounting seat, and the mounting seat is provided with a relief groove through which multiple protruding teeth are connected on the surface facing the connecting seat. The end of the relief groove away from the limiting protrusion is a blind end face, which is the second end. The protruding rib is placed in the relief groove and can slide along the straight line L in the relief groove.

[0017] Preferably, the mounting base has two detachable pressure seats, and a limiting groove is formed between the pressure seats and the mounting base. The openings of the two limiting grooves are arranged opposite to each other. The connecting seat is fixed on a base, and a limiting rib is provided on each side of the base. The two limiting ribs are slidably embedded in the two limiting grooves.

[0018] Preferably, the mounting base is provided with a limiting groove whose extension direction is consistent with the straight line L, and a ball plunger is installed on the base. The ball head of the ball plunger is slidably embedded in the limiting groove so as to limit the ball plunger through both ends of the limiting groove.

[0019] The seat, including the aforementioned adjustment mechanism.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0021] When adjusting the relative position of the mounting base and the connecting base, this utility model only requires moving the mounting base, without the need to operate a switch, making the operation simple and convenient. Furthermore, after the mounting base and the connecting base are adjusted into place, they have good stability and can provide stable support for the relevant components of the seat, preventing the relevant components of the seat from moving abnormally when squeezed by the user's body. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the adjustment mechanism of this utility model;

[0023] Figure 2 This is a cross-sectional view of the adjustment mechanism of this utility model;

[0024] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0025] Figure 4 for Figure 2 Enlarged view at point B;

[0026] Figure 5 for Figure 1 Schematic diagram of the middle mounting base;

[0027] Figure 6 for Figure 1 Schematic diagram of the middle connector;

[0028] Figure 7 for Figure 1Schematic diagram of the central locking component;

[0029] Figures 8a-8e This is a schematic diagram of the usage state of this utility model;

[0030] Figure 9 This is a structural schematic diagram of the seat of this utility model.

[0031] Wherein: 10, mounting base; 101, limiting protrusion; 102, end face; 11, protruding tooth; 111, guide slope; 112, stop surface; 12, locking groove; 13, clearance groove; 14, support rib; 15, limiting groove; 19, pressure seat; 20, connecting seat; 201, mounting wall; 202, mounting groove; 21, guide slide; 211, first limiting end; 212, second limiting end; 213, bending part; 214. First section; 215. Second section; 22. Guide groove; 30. Base; 31. Ball head plunger; 32. Limiting rib; 40. Locking element; 401. Front end face; 41. Boss; 411. Mating bevel; 412. Limiting surface; 42. Raised rib; 43. First pin; 44. Second pin; 50. Spring; 60. Backrest; 70. Seat cushion; 80. Bracket; 91. Mounting base; 92. Connecting base. Detailed Implementation

[0032] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments. Unless otherwise specified, the materials and equipment used in this embodiment are all commercially available. Examples of the 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 application, and should not be construed as limiting this application.

[0033] In the description of this application, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 on this application. In the description of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0034] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected," "linked," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a connection through an intermediary, or a connection within two elements or an interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0035] like Figure 1 , 2As shown in Figures 3, 4, 5, 6, and 7, this is an adjustment mechanism of the present invention, which includes a mounting base 10, a connecting base 20, a locking element 40, and a spring 50. The backrest of the seat can be connected to the mounting base 10, and the connecting base 20 can be installed on the seat cushion or connected to a bracket at the rear of the seat cushion. By adjusting the relative positions of the mounting base 10 and the connecting base 20 on a straight line L, which is consistent with the front-back direction, the front-back position of the seat back can be adjusted. Specifically, the mounting base 10 is located above the connecting base 20. A region cooperating with the connecting base 20 is provided on the lower surface of the mounting base 10. The mounting base 10 includes a first end, a second end, a connecting portion, and a pushing portion located within this region. The first end can be a limiting protrusion 101, the second end can be an end face 102, the connecting portion is located between the limiting protrusion 101 and the end face 102, and the pushing portion is located at the end of the connecting portion near the end face 102. The connecting portion includes multiple locking portions arranged along a straight line L. Specifically, each locking portion can be a locking groove 12, meaning multiple locking grooves 12 arranged in the front-back direction are distributed between the limiting protrusion 101 and the end face 102. The connecting base 20 is connected to the mounting base 10, and the two slide together to allow relative movement along a straight line L. A guide groove 21 is provided on the connecting base 20. The guide groove 21 includes a first limiting end 211, a second limiting end 212, and a bending portion 213. The bending portion 213 is located between the first limiting end 211 and the second limiting end 212. The guide groove 21 is formed into an L-shaped structure by the first limiting end 211, the bending portion 213, and the second limiting end 212. A first segment 214 is formed between the first limiting end 211 and the bending portion 213, extending from the bending portion 213 along a straight line L toward the limiting protrusion 101. That is, the bending portion 213 forms a first segment 214 extending from back to front toward the first limiting end 211. A second segment 215 is formed between the second limiting end 212 and the bending portion 213, extending from the bending portion 213 along a straight line L toward the mounting base 10. That is, the bending portion 213 forms a second segment 215 extending from bottom to top toward the second limiting end 212.The aforementioned mounting base 10 and connecting base 20 are arranged vertically to achieve a sliding fit. A locking member 40 is disposed between the mounting base 10 and the connecting base 20. The locking member 40 has a snap-fit ​​portion and a sliding portion. The snap-fit ​​portion is a boss 41 protruding from the locking member 40 towards the mating portion. The boss 41 can be fitted into one of the locking slots 12, that is, the boss 41 and the locking slot 12 are engaged together. This engagement of the boss 41 and the locking slot 12 limits the degree of freedom of the locking member 40 as it moves relative to the mounting base 10 towards the limiting protrusion 101. In other words, when the boss 41 and one of the locking slots 12 are engaged... In this state, the locking member 40 and the connecting seat 20 cannot move forward relative to the mounting base 10, that is, the mounting base 10 cannot move backward relative to the locking member 40 and the connecting seat 20. The sliding part can be a columnar structure provided on the locking member 40 that can be inserted into the guide groove 21. Specifically, the sliding part is a first pin 43 protruding from the side of the locking member 40. The first pin 43 passes through the guide groove 21 and can slide along the extension trajectory of the guide groove 21. That is, after the locking member 40 is installed on the connecting seat 20, the locking member 40 can move relative to the connecting seat 20 within the range of motion defined by the guide groove 21. The spring 50 is provided between the locking member 40 and the connecting seat 20. It can always push the locking member 40 towards the mounting base 10. That is, the elastic stress applied by the spring 50 to the locking member 40 can make the locking member 40 always have the tendency to move towards the mounting base 10.

[0036] The limiting protrusion 101 on the mounting base 10 is used to push the locking member 40 when it slides to the limiting protrusion 101 along with the connecting base 20. This causes the first pin 43 on the locking member 40 to slide along the first section 214 of the guide groove 21 from the first limiting end 211 toward the bent portion 213. When the first pin 43 slides to the bent portion 213, the first section 214 of the guide groove 21 no longer restricts the degree of freedom of the first pin 43 to move toward the mounting base 10. At this time, under the elastic stress of the spring 50, the locking member 40 moves upward, which allows the first pin 43 to move toward the mounting base 10 along the second section 215 of the guide groove 21 until the first pin... 43 moves to the second limiting end 212 of the guide slide 21 and is blocked by the second limiting end 212; the pushing part on the mounting base 10 is used to push the locking member 40 toward the connecting base 20, so that the locking member 40 overcomes the elastic stress of the spring 50 downward, and then the first pin 43 can slide from the second limiting end 212 of the guide slide 21 along the second section 215 toward the bending part 213. The end face 102 on the mounting base 10 is used to push the locking member 40 when the locking member 40 slides to the end face 102 with the connecting base 20, so that the first pin 43 on the locking member 40 can slide from the bending part 213 toward the first limiting end 211 along the first section 214 of the guide slide 21.

[0037] Figure 2 , 8a Figures 8b, 8c, 8d, and 8e illustrate the working process of the aforementioned regulating mechanism. Figure 2 In the state shown, the first pin 43 is located at the second limiting end 212 of the guide groove 21. At this time, the spring 50 applies an upward elastic stress to the locking member 40, so that the boss 41 on the locking member 40 is kept in a state of engagement with one of the locking grooves 12. Based on the shape of the boss 41 and the locking groove 12, they can limit the degree of freedom of the mounting seat 10 to move backward relative to the locking member 40 and the connecting seat 20. Thus, when a backward pressure is applied to the seat back connected to the mounting seat 10, the mounting seat 10 will not move. That is to say, at this time the mounting seat 10 and the connecting seat 20 are in a locked state, which can provide stable support for the seat back and enable the seat back to withstand the backward pressure from the user's back. When the backrest position needs to be adjusted forward, the mounting base 10 is pulled forward. Based on the shape of the boss 41 and the locking groove 12, the shape of the rear wall of the locking groove 12 can be used to press the boss 41. The boss 41 can disengage from the locking groove 12 and re-embed into another locking groove 12 after the mounting base 10 has moved a certain distance. During this process, the user only needs to pull the backrest forward to adjust the backrest to the desired position. When the backrest position is too far forward and needs to be adjusted backward, such as... Figure 8a As shown, when the mounting base 10 is pulled forward, and the boss 41 crosses the last side of the locking groove 12, the pushing part on the mounting base 10 contacts the locking member 40, pushing the locking member 40 downward. As the pushing part continues to move forward with the mounting base 10, the first pin 43 on the locking member 40 eventually moves to the bend 213 of the guide groove 21. At this time, as... Figure 8b Continuing to move the mounting base 10 forward, the end face 102 on the mounting base 10 pushes the locking member 40 forward, causing the first pin 43 to move forward from the bent portion 213 along the first segment 214 to the first limiting end 211. Since the elastic stress direction of the spring 50 is perpendicular or approximately perpendicular to the extension direction of the first segment 214, the elasticity generated by the spring 50 should not cause the first pin 43 to move within the first segment 214. That is, the first pin 43 remains fixed at the first limiting end 211. At this time, the boss 41 on the locking member 40 is in a lower position, that is, it will not cooperate with the locking groove 12 on the mounting base 10. The degree of freedom of the mounting base 10 to move backward relative to the locking member 40 and the connecting base 20 will no longer be limited by the locking member 40. Figure 8cAs shown, the mounting base 10 can be moved backward. When the limiting protrusion 101 on the mounting base 10 contacts the front end face 401 of the locking member 40, the limiting protrusion 101 pushes against the front end face 401 of the locking member 40. While the mounting base 10 continues to move backward, the limiting protrusion 101 pushes against the front end face 401, causing the locking member 40 to move relative to the connecting base 20. This causes the first pin 43 on the locking member 40 to move along the first section 214 of the guide groove 21 from the first limiting end 211 to the bent portion 213. At this time, see... Figure 8d As shown, the elastic stress of the spring 50 pushes the locking member 40 upward, causing the first pin 43 to move along the second section 215 of the guide groove 21 from the bent part 213 to the second limiting end 212. At this time, the boss 41 moves upward to the foremost position of the multiple locking grooves 12. Finally, according to the required adjustment position, such as... Figure 8e As shown, pulling the mounting base 10 forward allows the protrusion 41 to engage in the forward slot 12, completing the rearward adjustment of the seat back. This invention allows for easy adjustment of the relative position of the mounting base 10 and the connecting base 20 simply by moving the mounting base 10, eliminating the need for an operating switch. This makes the operation simple and convenient. Furthermore, once the mounting base 10 and the connecting base 20 are in place, they offer excellent stability, providing stable support for the seat's components and preventing abnormal movement when subjected to pressure from the user's body.

[0038] In a preferred embodiment, the present invention further provides a guide groove 22 on the connecting seat 20. The extension direction of the guide groove 22 is consistent with the straight line L, that is, the guide groove 22 extends in the front-to-back direction. The guide groove 22 and the guide slide 21 are staggered along the straight line L. Specifically, the guide groove 22 is located behind the guide slide 21. The locking member 40 is provided with a second pin 44. The second pin 44 slides through the guide groove 22, that is, the second pin 44 can slide back and forth along the guide groove 22, and the second pin 44 can rotate relative to the connecting seat 20 within the guide groove 22. The cross-section of the second pin 44 can be set to be circular, thereby enabling the second pin 44 to rotate. The second pin 44, capable of sliding and rotating within the guide groove 22, allows the first pin 43 to swing between the second limiting end 212 and the bent portion 213 of the guide groove 21 when the guide groove 22 rotates relative to the connecting seat 20. Through the cooperation of the second pin 44 and the guide groove 22, the locking member 40 has the freedom to swing up and down relative to the connecting seat 20 and the mounting seat 10, while ensuring that the first pin 43 can slide normally within the guide groove 21. When the locking member 40 is configured to swing, it can move stably between the mounting seat 10 and the connecting seat 20, preventing the locking member 40 from jamming. Alternatively, in other embodiments, the second pin 44 and the guide groove 22 may not be provided, allowing the locking member 40 to move linearly up and down relative to the connecting seat 20 and the mounting seat 10.

[0039] A mounting groove 202 is provided on the surface of the connecting seat 20 facing the mounting seat 10. Specifically, the mounting groove 202 can be formed by recessing the middle of the upper surface of the connecting seat 20 downward. A mounting wall 201 is formed on the part of the connecting seat 20 located on both sides of the mounting groove 202. Each mounting wall 201 is provided with a guide groove 21 and a guide groove 22. The two ends of the first pin 43 protrude from the two sides of the locking member 40 and pass into the two guide grooves 21. The two ends of the second pin 44 protrude from the two sides of the locking member 40 and pass into the two guide grooves 22. When assembling the locking member 40 with the connecting seat 20, the locking member 40 is placed in the mounting groove 202 from top to bottom, and the first pin 43 and the second pin 44 are inserted from one side of the connecting seat 20. The two ends of the first pin 43 and the second pin 44 respectively cooperate with the two mounting walls 201, so that the locking member 40 can move stably relative to the connecting seat 20, and avoid the locking member 40 from being tilted and thus jammed.

[0040] The mounting base 10 has multiple protruding teeth 11 on the surface facing the connecting base 20 (i.e., the lower surface of the mounting base 10). These protruding teeth 11 are arranged along a straight line L, and a locking groove 12 is formed between adjacent protruding teeth 11. Each protruding tooth 11 includes a guide slope 111 facing the first end and a stop surface 112 facing the second end. The stop surface 112 is perpendicular to the straight line L, extending vertically. The guide slope 111 gradually slopes downwards from front to back. Figure 2 As shown, when the boss 41 is placed in the locking groove 12, moving the mounting base 10 forward will cause the guide ramp 111 to press the boss 41 downward, causing the boss 41 to move towards the connecting base 20 to overcome the elastic stress of the spring 50. This allows the boss 41 to disengage from the locking groove 12. The stop surface 112 stops the boss 41 on the side facing the first end, i.e., the stop surface 112 stops the front side of the boss 41. At this time, the force exerted by the user's back on the backrest is transmitted to the mounting base 10, causing the mounting base 10 to tend to move backward. The stop surface 112 is blocked by the boss 41, and the mounting base 10 and the connecting base 20 remain relatively stationary, thus allowing the backrest to stably support the user's back. In other words, in such a situation... Figure 2 In the indicated state, the guide ramp 111, stop surface 112, and boss 41 form a one-way moving mechanism, allowing the mounting seat 10 to move forward but not backward, thus preventing the seat back from abnormally moving backward during use. The boss 41 includes a limiting surface 412 facing the first end and a mating ramp 411 facing the second end. The limiting surface 412 is perpendicular to the straight line L, extending vertically. The mating ramp 411 gradually slopes downward from front to back. The shape of the boss 41 matches the shape of the locking groove 12. When the boss 41 is inserted into the locking groove 12, its limiting surface 412 abuts against the stop surface 112 on the front side of the locking groove 12, and the mating ramp 411 fits against the guide ramp 111. The pushing part is a support rib 14 provided on the mounting seat 10 and protruding towards the connecting seat 20. Specifically, the support rib 14 extends downward from the lower surface of the mounting seat 10. The protruding support rib 14 has one end connected to the rearmost protruding tooth 11 and the other end extending rearward. When the mounting base 10 moves forward until the boss 41 moves to the rear of the last locking groove 12, that is, when the mating inclined surface 411 moves rearward relative to the mounting base 10 to the rear of the last locking groove 12, the support rib 14 and the mating inclined surface 411 of the boss 41 come into contact and engage. As the mating inclined surface 411 moves rearward relative to the support rib 14, the support rib 14 continuously pushes the mating inclined surface 411 downward, causing the part of the locking member 40 with the boss 41 to move toward the connecting base 20. After moving downward, the boss 41 can be completely offset from the locking groove 12 in the height direction, that is... Figure 8a The state shown.

[0041] This invention provides a protruding rib 42 extending toward the mounting base 10 in the middle of the locking member 40. A clearance groove 13 penetrating multiple protruding teeth 11 is provided on the surface of the mounting base 10 facing the connecting base 20 (i.e., the lower surface of the mounting base 10). The rear end of the clearance groove 13 is a blind end, forming the aforementioned end face 102. The protruding rib 42 is placed within the clearance groove 13 and can slide along a straight line L within the clearance groove 13. As the locking member 40 is positioned... Figure 8a In the indicated state, continue pulling the mounting base 10 forward. The protruding rib 42 abuts against the end face 102. The end face 102 pushes the protruding rib 42, thereby allowing the locking member 40 to move relative to the connecting base 20, and allowing the first pin 43 and the second pin 44 to move as shown. Figure 8b The state shown.

[0042] The guide groove 21 of this utility model serves as a guide part, which is provided on the connecting seat 20 to cooperate with the first pin 43 to guide the movement of the locking member 40. It should be noted that in other embodiments of this utility model, the guide groove 21 can be replaced by other guide components. For example, the guide part is set as an L-shaped rib on the connecting seat 20. Correspondingly, a sliding part that cooperates with the rib is provided on the locking member 40 so that it can slide freely along the extension direction of the rib. The sliding part that cooperates with the rib on the locking member 40 can be composed of two opposing protrusions. The two protrusions are respectively placed on both sides of the rib. The two protrusions clamp the rib and can slide freely along the extension direction of the rib. Limiting ends are formed at both ends of the rib. The middle part of the rib is bent to make the rib L-shaped.

[0043] Furthermore, the aforementioned locking part is not limited to the locking groove 12. The locking part can also be a protruding structure that protrudes from the mounting base 10 toward the connecting base 20. The corresponding locking part provided on the locking member 40 is a recessed structure that matches the protruding structure. In short, as long as the locking part can engage with the locking part, it is acceptable.

[0044] Two pressure seats 19 are detachably fixed on the mounting base 10. A limiting groove is formed between the pressure seats 19 and the mounting base 10. The openings of the two limiting grooves are arranged opposite to each other. The connecting seat 20 is fixed on a base 30. A limiting rib 32 is provided on each side of the base 30. The two limiting ribs 32 are slidably embedded in the two limiting grooves, thereby slidably connecting the mounting base 10 and the connecting seat 20 together and preventing them from separating in the direction perpendicular to the straight line L. Furthermore, the pressure seats 19 are detachably fixed to the mounting base 10. During assembly, the spring 50 and the locking member 40 can be pre-installed on the assembly formed by the connecting seat 20 and the base 30, and then the assembly is placed below the mounting base 10. Finally, the pressure seats 19 are placed below the two sides of the base 30 and fixed to the mounting base 10. This facilitates the installation of the locking member 40.

[0045] The mounting base 10 is provided with a limiting groove 15, the extension direction of the limiting groove 15 is consistent with the straight line L. A ball plunger 31 is mounted on the base 30, and the ball head of the ball plunger 31 is slidably embedded in the limiting groove 15. The ball plunger 31 is limited by the two ends of the limiting groove 15. When the user adjusts the backrest of the seat, the mounting base 10 is moved back and forth, and the ball plunger 31 slides in the limiting groove 15. Figure 8b As shown, when the mounting base 10 is moved forward to its limit position, the ball plunger 31 is positioned at the rear end of the limiting groove 15. At this point, the user is reminded not to pull the backrest forward any further. Figure 8d As shown, when the mounting base 10 is moved backward to its limit position, the ball plunger 31 is positioned at the front end of the limiting groove 15, at which point the user is reminded not to push the backrest further backward.

[0046] The spring 50 described above is used to apply an elastic stress to the locking member 40, so that the locking member 40 always has a tendency to move toward the mounting base 10. In other embodiments, the spring 50 can be replaced by other elastic members such as tension springs or elastic rubber blocks.

[0047] like Figure 9 As shown, this is a type of seat according to the present invention. The seat includes two adjustment mechanisms as described above, one of which is as follows: Figure 1 As shown, the backrest 60 can be adjusted in the fore-and-aft direction, and the backrest 60 is connected to the mounting base 10 of the adjustment mechanism; another adjustment mechanism can adjust the position of the backrest 60 in the vertical direction. Specifically, a bracket 80 is provided at the rear of the seat cushion 70, and the mounting base 91 of the other adjustment mechanism is connected to... Figure 1 On the base 30 of the adjustment mechanism shown, the connecting seat 92 of the other adjustment mechanism is connected to the bracket 80, so that the backrest 60 of the seat can be adjusted in the front-back direction and the up-down direction.

[0048] In other embodiments, the seat may be equipped with only one backrest adjustment mechanism for front-to-back adjustment or only one backrest adjustment mechanism for up-to-down adjustment.

[0049] It should be noted that in the seat of this utility model, the headrest, lumbar support, etc., can also be installed on the main structure of the seat through the aforementioned adjustment mechanism to achieve adjustment of the headrest, lumbar support, and other components. Other structures of the seat of this utility model are the same as those in the prior art and will not be described in detail here.

[0050] Finally, it should be noted that the above embodiments are only optional embodiments of this utility model and should not be used to limit the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. An adjusting mechanism, characterized in that, It includes a mounting base, a connecting base, a locking component, and a resilient component; The mounting base includes a first end, a second end, a connecting portion located between the first end and the second end, and a pushing portion located at the end of the connecting portion near the second end. The connecting portion includes multiple locking portions arranged along a straight line L. The connecting seat and the mounting seat are slidably fitted so that they can move relative to each other along a straight line L; the connecting seat is provided with a guide portion, which includes a first limiting end, a second limiting end, and a bent portion located between the first limiting end and the second limiting end. A first segment is formed between the first limiting end and the bent portion, extending from the bent portion along the straight line L toward the first end close to the mounting seat, and a second segment is formed between the second limiting end and the bent portion, extending from the bent portion toward the mounting seat. The locking member is provided with a snap-fit ​​part and a sliding part. The snap-fit ​​part is provided facing the engagement part to engage with one of the snap-fit ​​parts to limit the degree of freedom of the locking member as the connecting seat moves toward the first end relative to the mounting seat. The sliding part slides with the guide part so that the sliding member can slide along the extension trajectory of the guide part. The elastic element is used to provide an elastic stress applied to the locking element so that the locking element always has a tendency to move toward the mounting seat; The first end of the mounting base is used to push the locking member when the locking member slides to the first end with the connecting base, so that the sliding part on the locking member slides along the first segment from the first limiting end toward the bending part. The pushing part is used to abut the locking member so that the sliding part slides from the second limiting end along the second segment toward the bending part. The second end of the mounting base is used to push the locking member when the locking member slides to the second end with the connecting base, so that the sliding part on the locking member slides along the first segment from the bending part toward the first limiting end.

2. The adjusting mechanism as described in claim 1, characterized in that, The guide part is a guide groove provided on the connecting seat, and the sliding part is a first pin fixed on the locking member and embedded in the guide groove.

3. The adjusting mechanism as described in claim 2, characterized in that, The connecting seat is provided with a guide groove, the extension direction of the guide groove is consistent with the straight line L, and the guide groove and the guide slide are staggered along the straight line L. The locking member is provided with a second pin, which slides through the guide groove and is configured to be able to rotate relative to the connecting seat in the guide groove so that the first pin can swing between the second limiting end and the bending part of the guide slide.

4. The adjusting mechanism as described in claim 3, characterized in that, A mounting groove is provided on the surface of the connector facing the mounting base. The portions of the connector on both sides of the mounting groove form mounting walls. Each mounting wall is provided with a guide groove and a guide slot. The two ends of the first pin protrude from both sides of the locking member and pass into the two guide grooves. The two ends of the second pin protrude from both sides of the locking member and pass into the two guide slots.

5. The adjusting mechanism as described in claim 1, characterized in that, The mounting base has multiple protruding teeth facing the connecting base on its surface. These teeth are arranged along a straight line L. The locking part is a locking groove formed between two adjacent teeth. Each tooth includes a guide slope facing the first end and a stop surface facing the second end. The stop surface is perpendicular to the straight line L. The locking part is a boss that is mounted on the locking member and can be inserted into the locking groove to engage with it. The guide slope is used to press the boss towards the connecting base when it is placed in the locking groove and moves toward the second end, so that the boss can disengage from the locking groove. The stop surface is used to stop the boss on the side facing the first end when it is placed in the locking groove.

6. The adjusting mechanism as described in claim 5, characterized in that, The boss includes a limiting surface facing the first end and a mating inclined surface facing the second end. The limiting surface is set perpendicular to the straight line L. The pushing part is a support rib set on the mounting base and protruding towards the connecting seat. The mating inclined surface is used to contact and engage with the support rib when the boss moves towards the second end so that the support rib can push the mating inclined surface towards the connecting seat.

7. The adjusting mechanism as described in claim 5, characterized in that, The locking component is provided with a protruding rib extending toward the mounting base; the first end is a limiting protrusion provided on the mounting base, and the mounting base is provided with a relief groove through which multiple protruding teeth are connected on the surface facing the connecting base. The end of the relief groove away from the limiting protrusion is a blind end face, which is the second end. The protruding rib is placed in the relief groove and can slide along the straight line L in the relief groove.

8. The adjusting mechanism as described in claim 1, characterized in that, The mounting base has two detachable pressure seats, which form a limiting groove between the pressure seats and the mounting base. The openings of the two limiting grooves are opposite to each other. The connecting seat is fixed on a base, and a limiting rib is protruding from each side of the base. The two limiting ribs are slidably embedded in the two limiting grooves.

9. The adjusting mechanism as described in claim 8, characterized in that, The mounting base is provided with a limiting groove whose extension direction is consistent with the straight line L. A ball-head plunger is installed on the base. The ball head of the ball-head plunger is slidably embedded in the limiting groove so as to limit the ball-head plunger through both ends of the limiting groove.

10. A seat, characterized in that, Includes the adjustment mechanism as described in any one of claims 1-9.

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