Adjusting mechanism and seat

Abstract

The invention 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 invention, an operation switch is not needed, so that the operation process is simple and convenient, and after the mounting seat and the connecting seat are adjusted in place, the stability is better.

Description

Technical Field

[0001] The present invention relates to the technical field of seats, and in particular to an adjustment mechanism and a seat. Background Art

[0002] In order to meet people's different usage requirements, existing study chairs, office chairs, gaming chairs and other chairs usually have support components such as backrests, headrests, lumbar supports, etc. that are used to support human body parts adjustably installed on the main body of the chair to adapt to the different sitting postures and body shapes of users; when adjusting the support components on the chair, it is often necessary to operate a switch, the operation process is relatively complicated, and the support stability is poor. Summary of the invention

[0003] The object of the present invention is to provide an adjustment mechanism and a seat, which have a simple operation process and can provide stable support.

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

[0005] The adjusting mechanism comprises a mounting seat, a connecting seat, a locking member, and an elastic member;

[0006] The mounting seat 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 one end of the connecting portion close to the second end, wherein the connecting portion includes a plurality of locking portions arranged along a straight line L;

[0007] The connecting seat and the mounting seat are slidably matched so that the two can move relative to each other along the straight line L; a guide portion is provided on the connecting seat, and the guide portion includes a first limiting end, a second limiting end, and a bending portion located between the first limiting end and the second limiting end, a first section extending from the bending portion along the straight line L toward the first end close to the mounting seat is formed between the first limiting end and the bending portion, and a second section extending from the bending portion toward the mounting seat is formed between the second limiting end and the bending portion;

[0008] The locking member is provided with a clamping portion and a sliding portion, the clamping portion is arranged toward the combining portion to combine with one of the clamping portions to limit the freedom of the locking member to move toward the first end along with the connecting seat relative to the mounting seat, and the sliding portion is slidably matched with the guide portion so that the sliding member can slide along the extension track of the guide portion;

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

[0010] The first end of the mounting seat is used to push the locking member when the locking member slides to the first end along with the connecting seat, so that the sliding portion on the locking member slides from the first limit end toward the bending portion along the first section, and the pushing portion is used to push the locking member so that the sliding portion slides from the second limit end along the second section toward the bending portion, and the second end of the mounting seat is used to push the locking member when the locking member slides to the second end along the connecting seat, so that the sliding portion on the locking member slides from the bending portion toward the first limit end along the first section.

[0011] Preferably, the guiding portion is a guiding slot disposed on the connecting seat, and the sliding portion is a first pin fixed on the locking member and embedded in the guiding slot.

[0012] Preferably, a guide groove is provided on the connecting seat, the extension direction of the guide groove is consistent with the straight line L, and the guide groove and the guide slide groove are staggered along the straight line L. A second pin is provided on the locking member, the second pin is slidably connected to 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 limit end and the bending portion of the guide slide groove.

[0013] Preferably, a mounting groove is provided on the surface of the connecting seat facing the mounting seat, and the parts of the connecting seat located on both sides of the mounting groove form a mounting wall respectively, and each mounting wall is provided with a guide slide groove and a guide groove, and the two ends of the first pin protrude from both sides of the locking member respectively and then penetrate into the two guide slide grooves, and the two ends of the second pin protrude from both sides of the locking member respectively and then penetrate into the two guide grooves.

[0014] Preferably, a plurality of convex teeth protruding toward the connecting seat are arranged on the surface of the mounting seat facing the connecting seat, and the plurality of convex teeth are arranged along a straight line L. The locking portion is a locking groove formed between two adjacent convex teeth, and the convex tooth includes a guiding inclined surface toward the first end and a stop surface toward the second end, and the stop surface is arranged perpendicular to the straight line L. The locking portion is a boss provided on the locking member and capable of being embedded in the locking groove to engage with the locking groove, and the guiding inclined surface is used to squeeze the boss toward the connecting seat when the boss is placed in the locking groove and moves toward the second end so that the boss can be disengaged from the locking groove, and the stop surface is used to stop the side of the boss facing the first end when the boss is placed in the locking groove.

[0015] Preferably, the boss includes a limiting surface toward the first end and a matching inclined surface toward the second end, the limiting surface is arranged perpendicular to the straight line L, the pushing portion is a supporting rib provided on the mounting seat and protruding toward the connecting seat, and the matching inclined surface is used to contact and cooperate with the supporting rib when the boss moves toward the second end so that the supporting rib can press the matching inclined surface toward the connecting seat.

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

[0017] Preferably, two pressure seats are detachably fixed on the mounting seat, a limiting slide groove is formed between the pressure seat and the mounting seat, the openings of the two limiting slide grooves are arranged opposite to each other, the connecting seat is fixed on a base, and a limiting rib is protruded on both sides of the base, and the two limiting ribs are slidably embedded in the two limiting slide grooves.

[0018] Preferably, a limiting groove extending in the same direction as the straight line L is provided on the mounting seat, and a ball plunger is installed on the base, and the ball head of the ball plunger is slidably embedded in the limiting groove to limit the ball plunger at both ends of the limiting groove.

[0019] A seat comprising the above-mentioned adjustment mechanism.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] When adjusting the relative positions of the mounting seat and the connecting seat, the present invention only needs to move the mounting seat without operating a switch, so that the operation process is simple and convenient. After the mounting seat and the connecting seat are adjusted into place, they have better stability and can provide stable support for related components of the seat, preventing related components of the seat from moving abnormally when squeezed by the user's body. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the regulating mechanism of the present invention;

[0023] Figure 2 is a cross-sectional view of the adjustment mechanism of the present invention;

[0024] Figure 3 for Figure 2 Magnified view at A in the middle;

[0025] Figure 4 for Figure 2 Magnified view at B in the middle;

[0026] Figure 5 for Figure 1 A schematic diagram of the structure of the middle mounting seat;

[0027] Figure 6 for Figure 1 A schematic diagram of the structure of the middle connecting seat;

[0028] Figure 7 for Figure 1A schematic diagram of the structure of the middle locking member;

[0029] Figure 8a-8e It is a schematic diagram of the use state of the present invention;

[0030] Fig. 9 It is a structural schematic diagram of the seat of the present invention.

[0031] Wherein: 10, mounting seat; 101, limiting convex block; 102, end face; 11, convex tooth; 111, guiding inclined surface; 112, stop surface; 12, positioning groove; 13, avoidance groove; 14, supporting rib; 15, limiting groove; 19, pressing seat; 20, connecting seat; 201, mounting wall; 202, mounting groove; 21, guiding slide groove; 211, first limiting end; 212, second limiting end; 213, bending portion; 214, first section; 215, second section; 22, guide groove; 30, base; 31, ball plunger; 32, limiting rib; 40, locking member; 401, front end face; 41, boss; 411, matching inclined surface; 412, limiting surface; 42, convex rib; 43, first pin; 44, second pin; 50, spring; 60, backrest; 70, cushion; 80, bracket; 91, mounting seat; 92, connecting seat. DETAILED DESCRIPTION

[0032] Below, in conjunction with the accompanying drawings and specific embodiments, the present invention is further described. It should be noted that, under the premise of no conflict, the various embodiments described below or the various technical features can be arbitrarily combined to form a new embodiment. Except for special instructions, the materials and equipment used in this embodiment can be purchased from the market. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0033] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In the description of the present application, "plurality" means two or more, unless otherwise precisely and specifically specified.

[0034] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be connected through an intermediary medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] like Figure 1 , 2, 3, 4, 5, 6, and 7 show an adjustment mechanism of the present invention, which includes a mounting seat 10, a connecting seat 20, a locking member 40, and a spring 50. The seat backrest can be connected to the mounting seat 10, and the connecting seat 20 can be installed on the seat cushion or on a bracket connected to the rear of the seat cushion. By adjusting the relative positions of the mounting seat 10 and the connecting seat 20 on a straight line L, which is consistent with the front-to-back direction, the front-to-back position of the seat backrest can be adjusted. Specifically, the mounting seat 10 is located above the connecting seat 20, and an area that cooperates with the connecting seat 20 is provided on the lower surface of the mounting seat 10. The mounting seat 10 includes a first end, a second end, a coupling portion and a pushing portion located in the area. The first end can be a limiting protrusion 101, and the second end can be an end face 102. The coupling portion is located between the limiting protrusion 101 and the end face 102, and the pushing portion is located at one end of the coupling portion close to the end face 102. The coupling portion includes a plurality of latching portions arranged along a straight line L, and the latching portion can specifically be a latching groove 12, that is, a plurality of latching grooves 12 arranged along the front-to-back direction are distributed between the limiting protrusion 101 and the end face 102; the connecting seat 20 is connected to the mounting seat 10 together, and the two are slidably matched so that the two can move relative to each other along the straight line L. A guide groove 21 is provided on the connecting seat 20, and the guide groove 21 is provided on the connecting seat 20. The guide slot 21 includes a first limiting end 211, a second limiting end 212, and a bending portion 213, wherein the bending portion 213 is located between the first limiting end 211 and the second limiting end 212, and the guide slot 21 is formed into an L-shaped structure by the first limiting end 211, the bending portion 213, and the second limiting end 212, wherein a first section 214 is formed between the first limiting end 211 and the bending portion 213, extending from the bending portion 213 along the straight line L toward the limiting protrusion 101, that is, the bending portion 213 forms the first section 214 extending from back to front toward the first limiting end 211, and a second section 215 is formed between the second limiting end 212 and the bending portion 213, extending from the bending portion 213 along the straight line L toward the mounting seat 10, that is, the bending portion 213 forms the second section 215 extending from bottom to top toward the second limiting end 212.The above-mentioned mounting seat 10 and connecting seat 20 are arranged up and down to achieve sliding cooperation. The locking member 40 is arranged between the mounting seat 10 and the connecting seat 20. A clamping portion and a sliding portion are arranged on the locking member 40. The clamping portion is a boss 41 protruding from the locking member 40 toward the combining portion. The boss 41 can be embedded in one of the clamping grooves 12, that is, the boss 41 and the clamping groove 12 are engaged with each other. The engagement between the boss 41 and the clamping groove 12 can limit the freedom of the locking member 40 to move toward the limiting protrusion 101 relative to the mounting seat 10 with the connecting seat 20. That is, when the boss 41 is engaged with one of the clamping grooves 12, the locking member 40 can move freely with the connecting seat 20 relative to the mounting seat 10. In the state, the locking member 40 and the connecting seat 20 cannot move forward relative to the mounting seat 10, that is, the mounting seat 10 cannot move backward relative to the locking member 40 and the connecting seat 20. The sliding portion can be a columnar structure arranged on the locking member 40 and can be inserted into the guide slot 21. Specifically, the sliding portion is a first pin 43 protruding from the side of the locking member 40. The first pin 43 is inserted into the guide slot 21 and can slide along the extension track of the guide slot 21. That is to say, 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 limited by the guide slot 21. The spring 50 is arranged between the locking member 40 and the connecting seat 20, which can always push the locking member 40 toward the mounting seat 10, that is, the elastic stress applied by the spring 50 to the locking member 40 can make the locking member 40 always have a tendency to move toward the mounting seat 10.

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

[0037] Figure 2 , 8a 8b, 8c, 8d, and 8e show the working process of the above-mentioned adjustment mechanism. Figure 2 In the state shown, the first pin 43 is at the second limit end 212 of the guide slide groove 21. At this time, the spring 50 applies upward elastic stress to the locking member 40, so that the boss 41 on the locking member 40 remains in a state of being combined with one of the locking grooves 12. Based on the shapes of the boss 41 and the locking groove 12 that cooperate with each other, the two can limit the freedom of the mounting seat 10 to move backward relative to the locking member 40 and the connecting seat 20. In this way, when backward pressure is applied to the seat back connected to the mounting seat 10, the mounting seat 10 will not move. In other words, the mounting seat 10 and the connecting seat 20 are in a locked state at this time, which can provide stable support for the seat back and enable the seat back to withstand the backward pressure from the back of the user. When the backrest position needs to be adjusted forward, the mounting base 10 is pulled forward. Based on the shapes of the boss 41 and the positioning groove 12, the boss 41 can be squeezed by the shape of the rear wall of the positioning groove 12. The boss 41 can be separated from the positioning groove 12 and re-embedded into other positioning grooves 12 after the mounting base 10 moves a certain distance. In 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 forward and needs to be adjusted backward, such as Figure 8a As shown, the mounting seat 10 is pulled forward. When the boss 41 crosses the rearmost locking groove 12, the pushing portion on the mounting seat 10 contacts the locking member 40, pushing the locking member 40 downward. When the pushing portion continues to move forward with the mounting seat 10, the first pin 43 on the locking member 40 is finally moved to the bent portion 213 of the guide slot 21. At this time, as shown in FIG. Figure 8b , continue to move the mounting seat 10 forward, the end surface 102 on the mounting seat 10 pushes the locking member 40 forward, so that the first pin 43 moves forward from the bent portion 213 along the first section 214 to the first limiting end 211. Since the angle between the elastic stress direction of the spring 50 and the extending direction of the first section 214 is perpendicular or approximately perpendicular, the elasticity generated by the spring 50 should not cause the first pin 43 to move in the first section 214, that is, the first pin 43 remains in a fixed state 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 positioning groove 12 on the mounting seat 10, and the freedom of the mounting seat 10 to move backward relative to the locking member 40 and the connecting seat 20 will no longer be limited by the locking member 40. Figure 8cAs shown, the mounting seat 10 can be moved backward. When the limiting protrusion 101 on the mounting seat 10 contacts the front end surface 401 of the locking member 40, the limiting protrusion 101 pushes the front end surface 401 of the locking member 40. Under the premise of continuously moving the mounting seat 10 backward, the limiting protrusion 101 pushes the front end surface 401, so that the locking member 40 can move relative to the connecting seat 20, and then the first pin 43 on the locking member 40 moves from the first limiting end 211 to the bending portion 213 along the first section 214 of the guide slot 21. At this time, see Figure 8d As shown, the elastic stress of the spring 50 pushes the locking member 40 upward, so that the first pin 43 moves from the bent portion 213 to the second limiting end 212 along the second section 215 of the guide slot 21. At this time, the boss 41 moves upward to the front end of the plurality of positioning slots 12. Finally, according to the position to be adjusted, as shown in FIG. Figure 8e As shown, the mounting seat 10 is pulled forward so that the boss 41 can be embedded in the front locking groove 12, and the seat back is adjusted backward. When adjusting the relative position of the mounting seat 10 and the connecting seat 20, the present invention only needs to move the mounting seat 10, and there is no need to operate the switch, so that the operation process is simple and convenient, and after the mounting seat 10 and the connecting seat 20 are adjusted in place, they have better stability, can provide stable support for the relevant parts of the seat, and prevent the relevant parts of the seat from moving abnormally when being squeezed by the user's body.

[0038] In a preferred embodiment, the present invention further provides a guide groove 22 on the connecting seat 20, and 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, and the guide groove 22 and the guide slide groove 21 are staggered along the straight line L. Specifically, the guide groove 22 is arranged behind the guide slide groove 21, and a second pin 44 is provided on the locking member 40. The second pin 44 is slidably connected in the guide groove 22, that is, the second pin 44 can slide forward and backward along the guide groove 22, and the second pin 44 can rotate relative to the connecting seat 20 in the guide groove 22. The cross section of the second pin 44 can be set to a circle, so that the second pin 44 can Due to the characteristics of sliding back and forth and rotating in the guide groove 22, when the second pin 44 rotates in the guide groove 22 relative to the connecting seat 20, the first pin 43 can swing between the second limit end 212 and the bending portion 213 of the guide slide groove 21. The second pin 44 and the guide groove 22 cooperate with each other, so that the locking member 40 has the freedom to swing up and down relative to the connecting seat 20 and the mounting seat 10, and it can ensure that the first pin 43 can slide normally in the guide slide groove 21. When the locking member 40 is set to swing, the locking member 40 can move stably between the mounting seat 10 and the connecting seat 20 to avoid the locking member 40 from getting stuck. Of course, in other embodiments, the second pin 44 and the guide groove 22 may not be provided, and the locking member 40 can move up and down in a straight line 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 middle part of the upper surface of the connecting seat 20 can be recessed downward to form the mounting groove 202, and the parts of the connecting seat 20 located on both sides of the mounting groove 202 respectively form a mounting wall 201, and 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 then penetrate into the two guide grooves 21, and the two ends of the second pin 44 protrude from the two sides of the locking member 40 and then penetrate into the two guide grooves 22. When assembling the locking member 40 and the connecting seat 20, the locking member 40 is placed in the installation groove 202 from top to bottom, and the first pin 43 and the second pin 44 are passed through one side of the connecting seat 20. The two ends of the first pin 43 and the second pin 44 are respectively matched with the two installation walls 201, so that the locking member 40 can move stably relative to the connecting seat 20 to avoid the locking member 40 from being tilted and causing jamming.

[0040] The surface of the mounting seat 10 facing the connecting seat 20 (i.e., the lower surface of the mounting seat 10) is provided with a plurality of protruding teeth 11 protruding toward the connecting seat 20, and the plurality of protruding teeth 11 are arranged along a straight line L, and the above-mentioned clamping groove 12 is formed between two adjacent protruding teeth 11, and the protruding teeth 11 include a guiding inclined surface 111 toward the first end and a stop surface 112 toward the second end, and the stop surface 112 is arranged perpendicular to the straight line L, that is, the stop surface 112 extends in the up-down direction, and the guiding inclined surface 111 gradually tilts downward from front to back, as shown in FIG. Figure 2 As shown, when the boss 41 is placed in the positioning groove 12, the mounting seat 10 is moved forward, and the guiding inclined surface 111 will squeeze the boss 41 downward, so that the boss 41 moves toward the connecting seat 20 to overcome the elastic stress of the spring 50, and then the boss 41 can be disengaged from the positioning groove 12, and the stop surface 112 stops on the side of the boss 41 facing the first end, that is, the stop surface 112 stops on the front side of the boss 41. At this time, the force applied by the user's back on the backrest is transmitted to the mounting seat 10, so that the mounting seat 10 has a backward movement trend, and the stop surface 112 is blocked by the boss 41, and the mounting seat 10 and the connecting seat 20 remain relatively still, so that the backrest can stably support the user's back. That is to say, as shown in Figure 2 In the state shown, the above-mentioned guiding inclined surface 111, the stop surface 112 and the boss 41 form a one-way moving mechanism, which only allows the mounting seat 10 to move forward, but not to move backward, thereby preventing the seat back from abnormally moving backward when the seat is in use. The boss 41 includes a limiting surface 412 toward the first end and a matching inclined surface 411 toward the second end. The limiting surface 412 is perpendicular to the straight line L, that is, the limiting surface 412 extends in the up-down direction, and the matching inclined surface 411 gradually tilts downward from front to back. The shape of the boss 41 is consistent with the shape of the above-mentioned locking groove 12. When the boss 41 is embedded in 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 matching inclined surface 411 fits with the guiding inclined surface 111. The pushing portion is a support rib 14 provided on the mounting seat 10 and protruding toward the connecting seat 20. Specifically, the support rib 14 extends downward from the lower surface of the mounting seat 10. The protrusion is protruding, one end of the support rib 14 is connected to the convex tooth 11 on the rear side, and the other end extends backward. When the mounting seat 10 moves forward until the boss 41 moves to the rear side of a locking groove 12 on the rear side, that is, when the matching inclined surface 411 moves backward relative to the mounting seat 10 to the rear side of the last locking groove 12, the support rib 14 contacts and cooperates with the matching inclined surface 411 of the boss 41. As the matching inclined surface 411 moves backward relative to the support rib 14, the support rib 14 continuously pushes the matching inclined surface 411 downward, so that the part of the locking member 40 where the boss 41 is set moves toward the connecting seat 20. After moving downward, the boss 41 can be completely staggered with the locking groove 12 in the height direction, that is, Figure 8a Status shown.

[0041] The present invention provides a convex rib 42 extending toward the mounting seat 10 at the middle of the locking member 40, and provides an escape groove 13 penetrating a plurality of convex teeth 11 on the surface of the mounting seat 10 facing the connecting seat 20 (i.e., the lower surface of the mounting seat 10), the rear end of the escape groove 13 is a blind end, and the above-mentioned end face 102 is formed by the blind end of the escape groove 13, the convex rib 42 is placed in the escape groove 13 and can slide in the escape groove 13 along the straight line L, and the convex rib 42 is arranged with the locking member 40 in the state Figure 8a In the state shown, the mounting seat 10 is continuously pulled forward, the rib 42 abuts against the end surface 102, and the rib 42 is pushed by the end surface 102, so that the locking member 40 can move relative to the connecting seat 20, so that the first pin 43 and the second pin 44 can move to the position shown in FIG. Figure 8b Status shown.

[0042] The above-mentioned guide groove 21 of the present invention serves as a guide portion, which is arranged on the connecting seat 20 for cooperating with the first pin 43 to guide the movement of the locking member 40. It should be pointed out that in other embodiments of the present invention, the guide groove 21 can be replaced by other guide components. For example, the guide portion is arranged to be an L-shaped rib located on the connecting seat 20, and correspondingly, a sliding portion cooperating with the rib is arranged on the locking member 40 so as to be able to slide freely along the extension direction of the rib. The sliding portion cooperating with the rib on the locking member 40 can be composed of two opposing bosses, and the two bosses are respectively arranged on both sides of the rib. The two bosses clamp the rib and can slide freely along the extension direction of the rib. Limiting ends are respectively formed at both ends of the rib, and the middle part of the rib is bent to make the rib L-shaped.

[0043] In addition, the above-mentioned locking portion is not limited to the locking groove 12. The locking portion can also be a protruding structure protruding from the mounting seat 10 toward the connecting seat 20, and the corresponding locking portion arranged on the locking member 40 is a recessed structure matching the protruding structure. In short, as long as the locking portion can be engaged with the locking portion, it can be fine.

[0044] Two pressing seats 19 are detachably fixed on the mounting seat 10, and a limiting slide groove is formed between the pressing seat 19 and the mounting seat 10. The openings of the two limiting slide grooves are arranged opposite to each other. The connecting seat 20 is fixed on a base 30. A limiting rib 32 is protruded on both sides of the base 30. The two limiting ribs 32 are slidably embedded in the two limiting slide grooves, thereby slidingly connecting the mounting seat 10 and the connecting seat 20 together and preventing the two from separating in a direction perpendicular to the straight line L. In addition, the pressing seat 19 is detachably fixed to the mounting seat 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 under the mounting seat 10. Finally, the pressing seat 19 is placed under both sides of the base 30 and fixed to the mounting seat 10. In this way, the installation of the locking member 40 can be facilitated.

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

[0046] The spring 50 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 seat 10. In other embodiments, the spring 50 can be replaced by other elastic members such as a tension spring, an elastic rubber block, etc.

[0047] like Fig. 9 As shown, a seat of the present invention comprises two adjustment mechanisms as described above, one of which is as follows: Figure 1 As shown, the front and rear position of the backrest 60 can be adjusted in the front and rear direction, and the backrest 60 is connected to the mounting seat 10 of the adjustment mechanism; another adjustment mechanism can adjust the position of the backrest 60 in the up and down direction. Specifically, a bracket 80 is set at the rear of the seat cushion 70, and the mounting seat 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-to-back direction and the up-down direction.

[0048] In other embodiments, the seat may be provided with only one adjustment mechanism for adjusting the backrest in the front-rear direction, or only one adjustment mechanism for adjusting the backrest in the up-down direction.

[0049] It should be noted that in the seat of the present invention, the headrest, lumbar support, etc. of the seat can also be installed on the main structure of the seat through the above-mentioned adjustment mechanism to achieve adjustment of the headrest, lumbar support, etc. The other structures of the seat of the present invention 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-mentioned implementation modes are only optional embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention are within the scope of protection required by the present invention.

Claims

1. An adjustment mechanism, characterized in that: It includes a mounting seat, a connecting seat, a locking piece, and an elastic piece; The mounting seat 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 one end of the connecting portion close to the second end, wherein the connecting portion includes a plurality of locking portions arranged along a straight line L; The connecting seat and the mounting seat are slidably matched so that the two can move relative to each other along the straight line L; a guide portion is provided on the connecting seat, and the guide portion includes a first limiting end, a second limiting end, and a bending portion located between the first limiting end and the second limiting end, a first section extending from the bending portion along the straight line L toward the first end close to the mounting seat is formed between the first limiting end and the bending portion, and a second section extending from the bending portion toward the mounting seat is formed between the second limiting end and the bending portion; The locking member is provided with a clamping portion and a sliding portion, the clamping portion is arranged toward the combining portion to combine with one of the clamping portions to limit the freedom of the locking member to move toward the first end along with the connecting seat relative to the mounting seat, and the sliding portion is slidably matched with the guide portion so that the sliding member can slide along the extension track of the guide portion; The elastic member is used to provide an elastic stress applied to the locking member so that the locking member always has a tendency to move toward the mounting seat; The first end of the mounting seat is used to push the locking member when the locking member slides to the first end along with the connecting seat, so that the sliding portion on the locking member slides from the first limit end toward the bending portion along the first section, and the pushing portion is used to push the locking member so that the sliding portion slides from the second limit end along the second section toward the bending portion, and the second end of the mounting seat is used to push the locking member when the locking member slides to the second end along the connecting seat, so that the sliding portion on the locking member slides from the bending portion toward the first limit end along the first section.

2. The adjustment mechanism according to claim 1, characterized in that: The guiding part is a guiding sliding groove arranged on the connecting seat, and the sliding part is a first pin fixed on the locking member and embedded in the guiding sliding groove.

3. The adjustment mechanism according to claim 2, characterized in that: A guide groove is provided on the connecting seat, the extension direction of the guide groove is consistent with the straight line L, and the guide groove and the guide slide groove are staggered along the straight line L. A second pin is provided on the locking member, the second pin is slidably connected to 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 limit end and the bending portion of the guide slide groove.

4. The adjustment mechanism according to claim 3, characterized in that: A mounting groove is provided on the surface of the connecting seat facing the mounting seat, and the parts of the connecting seat located on both sides of the mounting groove form a mounting wall respectively. Each mounting wall is provided with a guide slide groove and a guide groove. The two ends of the first pin protrude from the two sides of the locking member respectively and then penetrate into the two guide slide grooves, and the two ends of the second pin protrude from the two sides of the locking member respectively and then penetrate into the two guide grooves.

5. The adjustment mechanism according to claim 1, characterized in that: A plurality of convex teeth protruding toward the connecting seat are arranged on the surface of the mounting seat facing the connecting seat, and the plurality of convex teeth are arranged along a straight line L. The locking portion is a locking groove formed between two adjacent convex teeth, and the convex tooth includes a guiding inclined surface toward the first end and a stop surface toward the second end, and the stop surface is arranged perpendicular to the straight line L. The locking portion is a boss arranged on the locking member and capable of being embedded in the locking groove to engage with the locking groove. The guiding inclined surface is used to squeeze the boss toward the connecting seat when the boss is placed in the locking groove and moves toward the second end so that the boss can be disengaged from the locking groove, and the stop surface is used to stop the side of the boss facing the first end when the boss is placed in the locking groove.

6. The adjustment mechanism according to claim 5, characterized in that: The boss includes a limiting surface toward the first end and a matching inclined surface toward the second end. The limiting surface is arranged perpendicular to the straight line L. The pushing portion is a supporting rib arranged on the mounting seat and protruding toward the connecting seat. The matching inclined surface is used to contact and cooperate with the supporting rib when the boss moves toward the second end so that the supporting rib can press the matching inclined surface toward the connecting seat.

7. The adjustment mechanism according to claim 5, characterized in that: The locking member is provided with a convex rib extending toward the mounting seat; the first end is a limiting protrusion arranged on the mounting seat, and a avoidance groove penetrating a plurality of protruding teeth is provided on the surface of the mounting seat facing the connecting seat, and the end of the avoidance groove away from the limiting protrusion is a blind end face, and the blind end face is the second end, and the convex rib is placed in the avoidance groove and can slide in the avoidance groove along a straight line L.

8. The adjustment mechanism according to claim 1, characterized in that: Two pressure seats are detachably fixed on the mounting seat, a limiting slide groove is formed between the pressure seat and the mounting seat, the openings of the two limiting slide grooves are arranged oppositely, the connecting seat is fixed on a base, and a limiting rib is protruded on both sides of the base, and the two limiting ribs are slidably embedded in the two limiting slide grooves.

9. The adjustment mechanism according to claim 8, characterized in that: The mounting seat is provided with a limiting groove whose extension direction is consistent with the straight line L. A ball plunger is installed on the base. The ball head of the ball plunger is slidably embedded in the limiting groove to limit the ball plunger at both ends of the limiting groove.

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

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