Elastic locking mechanism, modular sliding assembly and seat

Abstract

The utility model discloses an elastic locking mechanism, a modular sliding assembly and a seat, the elastic locking mechanism comprises a locking piece and a positioning plate, the bottom end of the positioning plate is sunken upwards to form a first connecting groove, and the locking piece is clamped to the positioning plate through the first connecting groove; the locking piece is of an integrally-formed structure and comprises a locking part and an elastic piece part which are inclined to each other, the elastic piece part is of a bent elastic piece-shaped structure, the lower end of the locking part and the lower end of the elastic piece part intersect to form a rotating part, and the rotating part is rotationally connected to the positioning plate; one side, far away from the elastic sheet part, of the locking part convexly extends to form locking teeth; a switching groove is formed in the positioning plate in a hollowed-out mode in the left-right direction, an elastic positioning part is arranged in the middle of the switching groove, the front end of the elastic positioning part protrudes to form a hook head part, the hook head part divides the switching groove into a left part and a right part, a gear adjusting part is formed on the side away from the elastic piece part, and a gear reset part is formed on the side close to the elastic piece part. The side, close to the positioning plate, of the locking piece protrudes to form a first clamping head, and the first clamping head is clamped into the conversion groove.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of seats, in particular to elastic locking mechanism, modularization sliding assembly and seat. BACKGROUND

[0002] Most office chairs on the market will configure headrest on the backrest, support the back of the head and the back of the neck of the user, not only make the sitting experience more comfortable, but also effectively relieve fatigue and protect the health of the cervical vertebra. And for users of different body types or different sitting postures, the horizontal distance between the head and the backrest usually has more or less difference. Therefore, in order to improve the practicability of the seat, the headrest of part of the existing seat can be adjusted forward and backward, and the user can adjust the position of the headrest according to the actual situation to ensure that the head and neck can be supported by the headrest, and the use experience is better.

[0003] Some seat headrest adjusting mechanisms on the market adopt a circulating gear structure, a gear slot is formed on the headrest connecting seat, and a locking piece that can rotate left and right is arranged on the chair body connecting seat. The locking piece is subjected to the elastic force of the spring, so that the teeth on the locking piece always have a tendency to be clamped into the tooth groove on the gear slot, thereby achieving adjustment.

[0004] Although the way of adjusting the headrest through the circulating gear structure is relatively simple, it has the following problems: the locking piece is clamped into the tooth groove by the elastic force of the spring, but the reset elastic force of the spring is weak, so that the connection strength between the teeth and the tooth groove is weak when the gear is fixed, and the stability is poor. Moreover, during the gear adjusting process, the spring may be twisted, causing the deviation of the pushing direction of the locking piece, which may cause the locking piece to fail to smoothly drive the teeth to be clamped into the tooth groove. Furthermore, the spring and the locking piece are usually a split structure, which needs to be assembled and then installed into the connecting seat, so the installation operation is relatively inconvenient. SUMMARY

[0005] In view of the above defects or deficiencies in the prior art, it is desirable to provide an elastic locking mechanism, a modular sliding assembly and a seat. By setting the elastic sheet part as an elastic sheet structure, not only has a larger reset elastic force when deforming, making the locking effect of the elastic locking mechanism more firm, but also the elastic sheet part, the locking part and the rotating part are integrally formed, making the overall stability of the locking piece better, and the structure is simple, and only needs to align the first connecting slot when installing, and the locking piece can be assembled and the positioning plate can be assembled, so the installation operation is relatively convenient.

[0006] The effect of the utility model is achieved as follows:

[0007] In a first aspect, the application provides an elastic locking mechanism, comprising a locking piece and a positioning plate, the bottom end of the positioning plate is recessed upward to form a first connecting groove, and the locking piece is clamped in the positioning plate through the first connecting groove; the locking piece is of an integral structure, comprising an interinclined locking portion and a spring portion, the spring portion is of a curved spring shape, the lower ends of the locking portion and the spring portion meet to form a rotating portion, the rotating portion is rotatably connected to the positioning plate, so that the locking portion and the spring portion can rotate synchronously around the rotating portion; the side of the locking portion away from the spring portion protrudes to form a lock tooth, and the end of the spring portion acts on the positioning plate and elastically deforms, so that the locking portion always has a tendency to rotate away from the spring portion;

[0008] The positioning plate is hollowed out in the left-right direction to form a conversion groove, the middle part of the conversion groove is provided with an elastic positioning portion extending in the horizontal direction, the elastic positioning portion has an elastic deformation capacity, the front end of the elastic positioning portion protrudes to form a hook head portion, the hook head portion divides the conversion groove into two parts, the side away from the spring portion forms a gear adjusting portion, and the side close to the spring portion forms a gear reset portion; the side close to the positioning plate of the locking piece protrudes to form a first clamping head, the first clamping head is clamped into the conversion groove, and with the rotation of the locking portion, the first clamping head is driven to move left and right in the conversion groove;

[0009] The elastic locking mechanism has a switchable use state and a switching state, in the use state, the hook head portion stops the first clamping head, so that the first clamping head is limited in the gear adjusting portion or the gear reset portion; when the elastic positioning portion is extruded to deform, the elastic locking mechanism enters the switching state, the hook head portion avoids the first clamping head, so that the first clamping head can move between the gear adjusting portion and the gear reset portion.

[0010] Further, the end face of the hook head portion close to the gear adjusting portion is inclined. When the first clamping head slides from the gear adjusting portion to the gear reset portion, the first clamping head slides along the inclined surface of the hook head portion, that is, it can smoothly slide from the gear adjusting portion to the gear reset portion, further improving the smoothness of the gear adjusting operation.

[0011] Further, the rotating portion protrudes a rotating support, the positioning plate is hollowed out to form a connecting hole, the rotating support passes through the connecting hole and can rotate along the circumferential direction of the rotating support, thereby driving the locking piece to rotate relative to the positioning plate. The connecting structure is simple, and the locking piece and the positioning plate are relatively fixed in the horizontal direction, so that the rotating process of the locking piece is relatively stable.

[0012] In a second aspect, the application further provides a modular sliding assembly, comprising a sliding piece and an elastic locking mechanism, the sliding piece is provided with a gear portion extending in the front-rear direction, and a plurality of clamping grooves are recessed on the side wall of the gear portion in the length direction; a bottom end of the positioning plate is recessed to form a second connecting groove extending through the front-rear direction, the second connecting groove is communicated with the first connecting groove, and the gear portion is slidably connected to the positioning plate through the second connecting groove, so that the sliding piece can slide on the positioning plate in the front-rear direction, and the locking tooth is opposite to the clamping groove.

[0013] The modular sliding assembly has switchable gear adjustment state and gear reset state. In the gear adjustment state, the first clamping head is located in the gear adjustment portion, the locking tooth is clamped into the clamping groove, and when the sliding piece slides relative to the positioning plate, the locking tooth is sequentially clamped and matched with the plurality of clamping grooves under the elastic force of the elastic piece portion to realize gear adjustment. In the gear reset state, the first clamping head is located in the gear reset portion, the locking tooth avoids the clamping groove, and the sliding piece can freely slide relative to the positioning plate. The clamping and matching of the locking tooth and the clamping groove realize gear adjustment, so that the adjustment operation stability of the modular sliding assembly is good. Moreover, the first clamping head is switched in the gear adjustment portion or the gear reset portion, which can drive the modular sliding assembly to switch the gear adjustment state and the gear reset state, so that the state switching operation of the modular sliding assembly is relatively simple.

[0014] Further, the front side groove wall of the clamping groove is horizontally arranged, and the rear side groove wall of the clamping groove is obliquely arranged. In the gear adjustment state, the locking tooth is firmly abutted against the horizontal groove wall of the front side of the clamping groove, and the sliding piece can be relatively fixed with the positioning plate. In the gear reset state, the locking tooth smoothly slides into the next clamping groove along the inclined surface of the clamping groove, so that the adjustment operation of the modular sliding assembly is more stable and smooth.

[0015] Further, a guide groove extending in the front-rear direction is recessed on the sliding piece, a second clamping head is protruded on the side close to the sliding piece, the second clamping head is clamped into the guide groove, the rear side groove wall of the guide groove forms a first pushing portion, and the first pushing portion is obliquely arranged towards the rear. When the sliding piece slides to the last end, the second clamping head slides downwards along the inclined surface of the first pushing portion while moving in the horizontal direction away from the clamping groove, thereby driving the first clamping head to press the elastic positioning portion to produce elastic deformation until the first clamping head slides from the gear adjustment portion into the gear reset portion, and the modular sliding assembly switches from the gear adjustment state to the gear reset state. The user only needs to pull the sliding piece backwards to complete the state switching operation, which is very simple.

[0016] Further, a first sliding groove is recessed on the sliding piece, and the positioning plate is slidably connected to the sliding piece through the first sliding groove. Not only the connection strength of the sliding piece and the positioning plate is improved, but also the elastic locking mechanism is integrally arranged in the sliding piece, so that the structure is more compact.

[0017] In a third aspect, the application further provides a seat, comprising a first connecting seat, a second connecting seat and a modular sliding assembly, the first connecting seat is configured to connect a headrest body, the second connecting seat is configured to connect a chair body, a sliding piece is connected to the bottom end of the first connecting seat, and a positioning plate is connected to the top end of the second connecting seat, so that when the sliding piece slides forward and backward relative to the positioning plate, the first connecting seat slides forward and backward relative to the second connecting seat. The headrest body can slide forward and backward relative to the chair body, and the user can adjust the forward and backward position of the headrest body according to the actual use needs, which is good in practicability, easy to operate and good in stability.

[0018] Further, the bottom end of the first connecting seat is further provided with a second pushing part, the second pushing part is located on the front side of the sliding piece, when the sliding piece slides to the most front end, the second pushing piece pushes the elastic positioning part to produce elastic deformation, the elastic locking mechanism is switched from the use state to the switching state, the first clamping head slides into the gear adjusting part from the gear reset part under the elastic force of the elastic sheet part, and the modular sliding assembly is switched from the gear reset state to the gear adjusting state. When the headrest body is reset to the last end, the user only needs to pull the headrest body backward to drive the second pushing piece to extrude the elastic positioning part, so as to complete the state switching operation, which further improves the simplicity of the state switching operation of the modular sliding assembly.

[0019] Further, the sliding piece is hollowed out in the length direction to form a second sliding groove, the positioning plate is connected to the second connecting seat by screw connection, and the screw passes through the positioning plate and the second sliding groove and is fixed to the second connecting seat. Not only is the installation and disassembly convenient, but also the sliding piece is clamped between the positioning plate and the second connecting seat, the connection strength is high, and the stability of the headrest adjustment operation is further improved.

[0020] The elastic locking mechanism, the modular sliding assembly and the seat provided by the application have the following advantages: the elastic sheet part is provided in the elastic sheet structure, which not only has a large reset elastic force when deformed, so that the locking effect of the elastic locking mechanism is more firm, but also the elastic sheet part, the locking part and the rotating part are integrally formed, the locking part and the elastic sheet part can rotate synchronously relative to the rotating part, so that the overall stability of the locking piece is good, the structure is simple, and when installing, the locking piece and the positioning plate can be assembled only by aligning the first connecting groove and clamping in, which is convenient to operate.

[0021] Moreover, the conversion groove is hollowed out in left and right directions on the positioning plate, and the elastic positioning part is arranged in the middle of the groove, the hook head part on the elastic positioning part divides the conversion groove into the gear adjusting part and the gear reset part, and the first clamping head can be stably clamped into the gear adjusting part or the gear reset part by the stop of the hook head part, so that the elastic locking mechanism is not easy to deflect during the adjusting process, thereby making the adjusting operation more stable and smooth; and the first clamping head can be moved between the gear adjusting part and the gear reset part by only extruding the elastic positioning part to make it elastically deform, so that the state switching operation is also more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0022] Other features, objects, and advantages of the application will become more apparent from the following detailed description of non-limiting embodiments made with reference to the drawings:

[0023] Figure 1 A perspective structural schematic view of the elastic locking mechanism provided for the embodiments of the application;

[0024] Figure 2 An internal structural schematic view of the elastic locking mechanism provided for the embodiments of the application;

[0025] Figure 3 A change process schematic view of the elastic locking mechanism provided for the embodiments of the application;

[0026] Figure 4 An internal structural schematic view of the modular sliding assembly provided for the embodiments of the application;

[0027] Figure 5 A perspective structural schematic view of the modular sliding assembly provided for the embodiments of the application;

[0028] Figure 6 A change schematic view of the modular sliding assembly when the sliding part is located at the front end provided for the embodiments of the application;

[0029] Figure 7 A change schematic view of the modular sliding assembly in the gear adjusting state provided for the embodiments of the application;

[0030] Figure 8 A change schematic view of the modular sliding assembly when switching from the gear adjusting state to the gear reset state provided for the embodiments of the application;

[0031] Figure 9 A connection structural schematic view between the first connecting seat and the second connecting seat provided for the embodiments of the application;

[0032] Figure 10 A connection structural schematic view between the first connecting seat and the elastic locking mechanism provided for the embodiments of the application;

[0033] Figure 11 The elastic sheet part provided by the embodiment of the application is a schematic diagram of a three-dimensional structure of a seat headrest;

[0034] Figure 12 The elastic sheet part provided by the embodiment of the application is a schematic diagram of a three-dimensional structure of a seat headrest;

[0035] The reference numerals are as follows: 1 - locking piece, 1a - elastic sheet part, 1b - locking part, 1c - rotating part, 110 - locking tooth, 120 - first clamping head, 130 - rotating support column, 140 - second clamping head, 2 - positioning plate, 201 - first connecting groove, 202 - second connecting groove, 210 - conversion groove, 210a - gear adjusting part, 210b - gear resetting part, 211 - elastic positioning part, 212 - hook head, 220 - rotating support hole, 3 - sliding piece, 301 - first sliding groove, 302 - second sliding groove, 310 - gear part, 311 - clamping groove, 320 - guide groove, 321 - first pushing part, 4 - first connecting seat, 4a - headrest body, 410 - second pushing part, 5 - second connecting seat. DETAILED DESCRIPTION

[0036] The application will be described in further detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related utility model, and are not a limitation on the utility model. In addition, it should be noted that, for the convenience of description, only the parts related to the utility model are shown in the drawings.

[0037] Please refer to the drawings Figures 1-3 The embodiment of the application provides an elastic locking mechanism, which comprises a locking piece 1 and a positioning plate 2. The bottom end of the positioning plate 2 is recessed upward to form a first connecting groove 201, and the locking piece 1 is clamped to the positioning plate 2 through the first connecting groove 201. The locking piece 1 is an integrally formed structure, and the locking piece 1 comprises a locking part 1a and an elastic sheet part 1b which are inclined to each other. The elastic sheet part 1b is a curved elastic sheet structure, the lower ends of the locking part 1a and the elastic sheet part 1b meet to form a rotating part 1c, the rotating part 1c is rotationally connected to the positioning plate 2, so that the locking part 1a and the elastic sheet part 1b can synchronously rotate around the rotating part 1c. The side of the locking part 1a away from the elastic sheet part 1b protrudes to form a locking tooth 110, and the end of the elastic sheet part 1b acts on the positioning plate 2 and produces elastic deformation, so that the locking part 1a always has a tendency to rotate away from the elastic sheet part 1b.

[0038] The positioning plate 2 is hollowed in the left-right direction and is provided with a conversion groove 210, and the middle part of the conversion groove 210 is provided with an elastic positioning part 211 extending in the horizontal direction, the elastic positioning part 211 has the ability of elastic deformation, the front end of the elastic positioning part 211 protrudes to form a hook head part 212, the hook head part 212 divides the conversion groove 210 into two parts, one side away from the elastic sheet part 1b forms a gear adjusting part 210a, and one side close to the elastic sheet part 1b forms a gear reset part 210b; the first clamping head 120 is protruded on the side close to the positioning plate 2 of the locking part 1, the first clamping head 120 is clamped into the conversion groove 210, and with the rotation of the locking part 1a, the first clamping head 120 is driven to move left and right in the conversion groove 210.

[0039] The elastic locking mechanism has a switchable use state and a switch state, in the use state, the hook head part 212 stops the first clamping head 120, so that the first clamping head 120 is limited in the gear adjusting part 210a or the gear reset part 210b; when the elastic positioning part 211 is extruded to deform, the elastic locking mechanism enters the switch state, the hook head part 212 avoids the first clamping head 120, so that the first clamping head 120 can move between the gear adjusting part 210a and the gear reset part 210b.

[0040] In the embodiment, by setting the elastic sheet part 1b as an elastic sheet structure, not only has a large reset elastic force when deformed, so that the locking effect of the elastic locking mechanism is more firm; and the elastic sheet part 1b, the locking part 1b and the rotating part 1c are integrally formed, the locking part 1b and the elastic sheet part 1b can be synchronously rotated relative to the rotating part 1c, so that the overall stability of the locking part 1 is good, and the structure is simple, and when installed, the locking part 1 and the positioning plate 2 can be assembled by aligning the first connecting groove 201 and clamping into the first connecting groove 201, and the installation operation is more convenient.

[0041] Furthermore, by hollowing the positioning plate 2 in the left-right direction to form the conversion groove 210, and setting the elastic positioning part 211 which can elastically deform in the middle part of the groove 210, the hook head part 212 on the elastic positioning part 211 divides the conversion groove 210 into the gear adjusting part 210a and the gear reset part 210b, by the stop of the hook head part 212, the first clamping head 120 can be stably clamped into the gear adjusting part 210a or the gear reset part 210b, so that the locking part 1 is not easy to be deflected in the adjusting process, so that the adjusting operation is more stable and smooth; and only by extruding the elastic positioning part 211 to make it elastically deform, the first clamping head 120 can be driven to move between the gear adjusting part 210a and the gear reset part 210b, so that the state switching operation is also more convenient.

[0042] Please refer to the accompanying drawings Figures 2-4 In some embodiments of the present application, the end face of the hook head part 212 close to the gear adjusting part 210a is inclined.

[0043] In the embodiment, when the first clamping head 120 slides into the gear reset portion 210b from the gear adjustment portion 210a, the first clamping head 120 only needs to press the hook head portion 212 in the horizontal direction, and the first clamping head 120 slides along the inclined surface of the hook head portion 212, so as to be smoothly slid into the gear reset portion 210b from the gear adjustment portion 210a, and further improve the smoothness of the gear adjustment operation.

[0044] Please refer to the accompanying drawings Figure 2 In some embodiments of the present application, the rotating portion 1c protrudes a rotating support 130, the positioning plate 2 is hollowly provided with a connecting hole 220, the rotating support 130 passes through the connecting hole 220 and can rotate along the circumferential direction of the rotating support 130, and further drives the locking piece 1 to rotate relative to the positioning plate 2. The connecting structure is simple, and the locking piece 1 and the positioning plate 2 are relatively fixed in the horizontal direction, so that the rotating process of the locking piece 1 is relatively stable.

[0045] Please refer to the accompanying drawings Figures 4-8 The embodiment of the present application further provides a modular sliding assembly, which comprises a sliding piece 3 and an elastic locking mechanism. The sliding piece 3 is provided with a gear portion 310 extending in the front-rear direction. A plurality of clamping grooves 311 are recessed in the side wall of the gear portion 310 in the length direction. The bottom end of the positioning plate 2 is recessed to form a second connecting groove 202 penetrating through the front-rear direction. The second connecting groove 202 is connected with the first connecting groove 201. The gear portion 310 is slidably connected to the positioning plate 2 through the second connecting groove 202, so that the sliding piece 3 can slide on the positioning plate 2 in the front-rear direction, and the locking tooth 110 is opposite to the clamping groove 311.

[0046] The modular sliding assembly has switchable gear adjustment states and gear reset states. In the gear adjustment state, the first clamping head 120 is located in the gear adjustment portion 210a, the locking tooth 110 is clamped into the clamping groove 311, and when the sliding piece 3 slides relative to the positioning plate 2, the locking tooth 110 is sequentially clamped and matched with the plurality of clamping grooves 311 under the elastic force of the elastic piece portion 1b to realize gear adjustment. In the gear reset state, the first clamping head 120 is located in the gear reset portion 210b, the locking tooth 110 avoids the clamping groove 311, and the sliding piece 3 can freely slide relative to the positioning plate 2.

[0047] In the embodiment, the locking tooth 110 and the clamping groove 311 are clamped and matched to realize gear adjustment, so that the adjustment operation stability of the modular sliding assembly is better. The gear portion 310 and the second connecting groove 202 at the bottom end of the positioning plate 2 are slidably matched, so that they are relatively fixed in the left-right direction, and the sliding adjustment operation of the sliding piece 3 is relatively stable. Furthermore, the first clamping head 120 is switched in the gear adjustment portion 210a or the gear reset portion 210b to clamp or avoid the clamping groove 311, so as to drive the modular sliding assembly to switch the gear adjustment state and the gear reset state, and the state switching operation of the modular sliding assembly is relatively simple.

[0048] In the embodiment, seven slots 311 are arranged on the gear part 310, i.e., the modular sliding assembly has seven gears that can be adjusted, and has high degree of freedom. Of course, in other embodiments of the present application, the number of slots 311 on the gear part 310 can also be five, six, eight, etc.

[0049] Please refer to the accompanying drawings Figure 4 In some embodiments of the present application, the front side slot wall of the slot 311 is horizontally arranged, and the rear side slot wall of the slot 311 is obliquely arranged.

[0050] In the embodiment, by horizontally arranging the front side slot wall of the slot 311, when the sliding piece 3 is pushed backward in the gear adjustment state, the sliding piece 3 can be kept relatively fixed with the positioning plate 2 because the lock tooth 110 firmly abuts against the horizontal slot wall of the front side of the slot 311. Furthermore, by obliquely arranging the rear side slot wall of the slot 311, when the sliding piece 3 is pulled forward in the gear adjustment state, the lock tooth 110 pushes the oblique slot wall of the rear side of the slot 311 and smoothly slides into the next slot 311 along the slope of the slot 311, so as to realize gear switching, thereby making the adjustment operation of the modular sliding assembly more stable and smooth.

[0051] Please refer to the accompanying drawings Figures 6-8 In some embodiments of the present application, a guide slot 320 extending in front and rear directions is recessed on the sliding piece 3, a second clamping head 140 is protruded on the side of the locking piece 1 close to the sliding piece 3, the second clamping head 140 is clamped into the guide slot 320, the rear side slot wall of the guide slot 320 forms a first pushing part 321, and the first pushing part 321 is obliquely arranged toward the rear. When the sliding piece 3 slides to the last end, the second clamping head 140 slides downward along the slope of the first pushing part 321, and at the same time, the second clamping head 140 moves in the horizontal direction away from the slot 311, thereby driving the first clamping head 120 to press the elastic positioning part 211 to make it elastically deform until the first clamping head 120 slides from the gear adjustment part 210a into the gear reset part 210b, and the modular sliding assembly is switched from the gear adjustment state to the gear reset state.

[0052] In the embodiment, by arranging the oblique first pushing part 321, the second clamping head 140 slides along the slope of the pushing part 321 and drives the first clamping head 120 to automatically slide from the gear adjustment part 210a into the gear reset part 210b, thereby automatically switching the modular sliding assembly from the gear adjustment state to the gear reset state. The user only needs to pull the sliding piece 3 backward to complete the state switching operation, which is very simple.

[0053] Please refer to the accompanying drawings Figures 4-5In some embodiments of the present application, the recess on the sliding piece 3 is provided with a first sliding groove 301, and the positioning plate 2 is slidably connected to the sliding piece 3 through the first sliding groove 301. Not only the connection strength of the sliding piece 3 and the positioning plate 2 is improved, but also the elastic locking mechanism is integrally arranged in the sliding piece 3, and the structure is more compact.

[0054] Please refer to the accompanying drawings Figures 9-12 The present application also provides a seat, which comprises a first connecting seat 4, a second connecting seat 5 and a modular sliding assembly. The first connecting seat 4 is configured to connect a headrest body 4a, the second connecting seat 5 is configured to connect a chair body, the sliding piece 3 is connected to the bottom end of the first connecting seat 4, and the positioning plate 2 is connected to the top end of the second connecting seat 5, so that when the sliding piece 3 slides forward and backward relative to the positioning plate 2, the first connecting seat 4 slides forward and backward relative to the second connecting seat 5.

[0055] In the present embodiment, the first connecting seat 4 slides forward and backward relative to the second connecting seat 5 through the modular sliding assembly, thereby driving the headrest body 4a to slide forward and backward relative to the chair body, so that the user can adjust the forward and backward position of the headrest body 4a according to the actual use needs, which is practical, easy to operate and has good stability.

[0056] Please refer to the accompanying drawings Figure 10 In some embodiments of the present application, the bottom end of the first connecting seat 4 is further provided with a second pushing part 410, and the second pushing part 410 is located on the front side of the sliding piece 3. When the sliding piece 3 slides to the most front end, the second pushing part 410 pushes the elastic positioning part 211 to produce elastic deformation, the elastic locking mechanism is switched from the use state to the switching state, the first clamping head 120 is slid into the gear adjusting part 210a from the gear reset part 210b under the elastic force of the elastic sheet part 1b, and the modular sliding assembly is switched from the gear reset state to the gear adjusting state. When the headrest body 4a is reset to the last end, the user only needs to pull the headrest body 4a backward to drive the second pushing part 410 to press the elastic positioning part 211, so as to complete the state switching operation, and the convenience of the state switching operation of the modular sliding assembly is further improved.

[0057] When the front and rear positions of the headrest need to be adjusted, the headrest body 4a is only pulled forward, the lock teeth 110 are sequentially clamped and matched with the clamping grooves 311 under the elastic force of the elastic sheet part 1b, when the appropriate position is adjusted, the headrest assembly is only released, the lock teeth 110 can be stably clamped into the clamping grooves 311 under the elastic force of the elastic sheet part 1b, and the headrest assembly can be stably fixed at the current position when the rear depending force is applied; when the headrest needs to be reset, the headrest body 4a is only pulled forward to the front end again, the second clamping head 140 moves along the inclined surface of the first pushing part 321, and then drives the first clamping head 120 to slide into the gear reset part 210b from the gear adjustment part 210a, so that the lock teeth 110 avoid the clamping grooves 311, the modular sliding assembly can automatically switch to the gear reset state, and the user can smoothly push the headrest body 4a to the rear end until the second pushing part 410 pushes the elastic positioning part 211, so that the first clamping head 120 is separated from the elastic clamping hook 212 and re-slides into the gear adjustment part 210a, the lock teeth 110 are re-clamped into the clamping grooves 311, and the modular sliding assembly automatically switches to the gear adjustment state. Therefore, the user only needs to push and pull the headrest body 4a during use to automatically complete the gear adjustment operation, which is very simple.

[0058] Please refer to the attached drawings Figure 9 In some embodiments of the present application, the second sliding groove 302 is hollowed out in the length direction on the sliding piece 3, and the positioning plate 2 is connected to the second connecting seat 5 by screw connection. The screw passes through the positioning plate 2 and the second sliding groove 302 and is fixed to the second connecting seat 5.

[0059] In this embodiment, the positioning plate 2 and the second connecting seat 5 are fixed by screw connection, which is convenient to install and disassemble. The screw passes through the second sliding groove 302, so that the sliding piece 3 is clamped between the positioning plate 2 and the second connecting seat 5, the connection strength is high, and the stability of the headrest adjustment operation is further improved.

[0060] Preferably, the groove bottom of the first sliding groove 301 is hollowed out with two second sliding grooves 302 which are left-right symmetrical, further improving the connection strength between the sliding piece 3 and the positioning plate 2, so that the sliding process of the sliding piece 3 relative to the positioning plate 2 is more stable and smooth.

[0061] It should be understood that the above-mentioned terms "center", "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is more than three.

[0062] The above description is only the preferred embodiment of the present application and the explanation of the technical principles applied. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the utility model. For example, the technical solutions formed by mutually replacing the above-mentioned features and the technical features disclosed in the present application (but not limited to) with similar functions.

Claims

1. An elastic locking mechanism, characterized in that, The utility model provides a locking mechanism, including locking piece (1) and locating plate (2), the bottom end of locating plate (2) is recessed upwards and forms first connecting groove (201), locking piece (1) is clamped in locating plate (2) through first connecting groove (201), locking piece (1) is integrally formed structure, locking piece (1) includes mutually inclined locking portion (1a) and spring piece portion (1b), spring piece portion (1b) is curved spring piece structure, the lower end of locking portion (1a) and spring piece portion (1b) meets and forms rotating portion (1c), rotating portion (1c) is rotatably connected to locating plate (2), so that locking portion (1a) and spring piece portion (1b) can rotate around rotating portion (1c) simultaneously, the side of locking portion (1a) away from spring piece portion (1b) is protruded and is formed with lock tooth (110), the end of spring piece portion (1b) acts on locating plate (2) and generates elastic deformation, so that locking portion (1a) always has the tendency of rotating away from spring piece portion (1b) direction, Locating plate (2) is hollowed out and is provided with conversion groove (210) along left and right orientation, the middle part of conversion groove (210) is provided with elastic positioning portion (211) extending along horizontal direction, elastic positioning portion (211) has elastic deformation capacity, the front end of elastic positioning portion (211) is protruded and is formed with hook head portion (212), hook head portion (212) divides conversion groove (210) into two parts, the side away from spring piece portion (1b) forms gear adjusting portion (210a), the side close to spring piece portion (1b) forms gear reset portion (210b), the side close to locating plate (2) of locking piece (1) is protruded and is formed with first clamping head (120), first clamping head (120) is clamped into conversion groove (210), along with the rotation of locking portion (1a), first clamping head (120) is driven and moves left and right in conversion groove (210), The elastic locking mechanism has switchable use state and switching state, in use state, hook head portion (212) stops first clamping head (120), so that first clamping head (120) is limited in gear adjusting portion (210a) or gear reset portion (210b), when elastic positioning portion (211) is extruded and deformed, the elastic locking mechanism enters switching state, hook head portion (212) avoids first clamping head (120), so that first clamping head (120) can move between gear adjusting portion (210a) and gear reset portion (210b).

2. The elastic locking mechanism of claim 1, wherein, The end face of hook head portion (212) close to gear adjusting portion (210a) side is inclinedly arranged.

3. The elastic locking mechanism of claim 1, wherein, Rotating portion (1c) is protruded and is provided with rotating support (130), locating plate (2) is hollowed out and is provided with connecting hole (220), rotating support (130) passes through connecting hole (220) and can rotate along the circumferential direction, and then drives locking piece (1) to rotate relative to locating plate (2).

4. A modular sliding assembly, characterized in that, The modular sliding assembly comprises a sliding piece (3) and an elastic locking mechanism as claimed in any one of claims 1-3, wherein the sliding piece (3) is provided with a gear portion (310) extending in the front-rear direction, and a plurality of clamping grooves (311) are recessed in the length direction on the side wall of the gear portion (310); the bottom end of the positioning plate (2) is recessed to form a second connecting groove (202) extending through the front-rear direction, the second connecting groove (202) is connected to the first connecting groove (201), and the gear portion (310) is slidingly connected to the positioning plate (2) through the second connecting groove (202), so that the sliding piece (3) can slide on the positioning plate (2) in the front-rear direction, and the locking tooth (110) is opposite to the clamping groove (311). The modular sliding assembly has switchable gear adjustment and gear reset states. In the gear adjustment state, the first clamping head (120) is located in the gear adjustment portion (210a), the locking tooth (110) is clamped into the clamping groove (311), and when the sliding piece (3) slides relative to the positioning plate (2), the locking tooth (110) is clamped and matched with the plurality of clamping grooves (311) under the elastic force of the elastic piece portion (1b) to realize gear adjustment. In the gear reset state, the first clamping head (120) is located in the gear reset portion (210b), the locking tooth (110) avoids the clamping groove (311), and the sliding piece (3) can slide freely relative to the positioning plate (2).

5. The modular sliding assembly of claim 4, wherein, The front side groove wall of the clamping groove (311) is horizontally arranged, and the rear side groove wall of the clamping groove (311) is arranged in an inclined manner.

6. The modular sliding assembly of claim 4, wherein, The sliding piece (3) is recessed to form a guide groove (320) extending in the front-rear direction, the side of the locking piece (1) close to the sliding piece (3) is protruded to form a second clamping head (140), the second clamping head (140) is clamped into the guide groove (320), the rear side groove wall of the guide groove (320) forms a first pushing portion (321), and the first pushing portion (321) is arranged in an inclined manner towards the rear. When the sliding piece (3) slides to the last end, the second clamping head (140) slides downwards along the inclined surface of the first pushing portion (321), at the same time, the second clamping head (140) moves in the horizontal direction away from the clamping groove (311), thereby driving the first clamping head (120) to press the elastic positioning portion (211) to produce elastic deformation until the first clamping head (120) slides from the gear adjustment portion (210a) into the gear reset portion (210b), and the modular sliding assembly is switched from the gear adjustment state to the gear reset state.

7. The modular sliding assembly of claim 4, wherein, The sliding piece (3) is recessed to form a first sliding groove (301), and the positioning plate (2) is slidingly connected to the sliding piece (3) through the first sliding groove (301).

8. A seat, characterized by The modular sliding assembly comprises a first connecting seat (4), a second connecting seat (5), and the modular sliding assembly as claimed in any one of claims 4-7, the first connecting seat (4) is configured to connect a headrest body (4a), the second connecting seat (5) is configured to connect a seat body, the sliding piece (3) is connected to the bottom end of the first connecting seat (4), and the positioning plate (2) is connected to the top end of the second connecting seat (5), so that when the sliding piece (3) slides forward and backward relative to the positioning plate (2), the first connecting seat (4) slides forward and backward relative to the second connecting seat (5).

9. The seat of claim 8, wherein, The bottom end of the first connecting seat (4) is further provided with a second pushing part (410), the second pushing part (410) is located on the front side of the sliding piece (3), when the sliding piece (3) slides to the most front end, the second pushing part (410) pushes the elastic positioning part (211) to make it elastically deform, the elastic locking mechanism is switched from the use state to the switching state, the first clamping head (120) slides into the gear adjusting part (210a) from the gear resetting part (210b) under the elastic force of the elastic sheet part (1b), and the modular sliding assembly is switched from the gear resetting state to the gear adjusting state.

10. The seat of claim 8, wherein, The sliding piece (3) is hollowed out in the length direction and is provided with a second sliding groove (302), the positioning plate (2) is connected to the second connecting seat (5) in a screw connection manner, a screw passes through the positioning plate (2) and the second sliding groove (302) and is fixed to the second connecting seat (5).

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