Waist piece gear adjusting mechanism and seat

Abstract

The waist piece gear adjusting mechanism comprises a waist rest body and waist pieces arranged on the waist rest body in a bilateral symmetry mode, columnar first hinge parts are arranged at the left end and the right end of the waist rest body correspondingly, and columnar second hinge parts are arranged at the ends, close to the waist rest body, of the waist pieces; the first hinging part and the second hinging part are connected up and down and are mutually hinged through a hinging mechanism; a first gear adjusting mechanism is arranged between the first hinge part and the second hinge part and comprises a first gasket arranged on the first hinge part and a second gasket arranged on the second hinge part, and the first gasket and the second gasket are connected up and down; the opposite end faces of the first gasket and the second gasket are each provided with a plurality of tooth grooves distributed in the circumferential direction, and the first gasket and the second gasket are meshed with each other through the tooth grooves. When the second hinge part rotates relative to the first hinge part, the second gasket rotates relative to the first gasket, and the tooth grooves between the first gasket and the second gasket are sequentially meshed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of seats, in particular to a waist piece gear adjusting mechanism and a seat. BACKGROUND

[0002] It is known that modern people continuously improve the health and comfort requirements of seats, in order to meet the needs of users, the existing seat is provided with a waist rest to support the waist of the user, the waist rest not only provides a more comfortable support experience for the waist, but also effectively relieves the waist fatigue and protects the health of the lumbar vertebrae. In order to better meet the needs of users for comfort and health, the waist rest is upgraded from the earliest single waist support to double waist support, the waist rest of the double waist support can provide better waist wrapping effect, but the supporting force is concentrated on both sides of the waist, which is still not comfortable, so the double waist support is further upgraded to triple waist support, which makes up for the defect that the supporting force of the double waist support is concentrated on both sides, and the waist support in the middle disperses the force on the waist.

[0003] For example, a three-section elastic waist support structure chair (application number: CN202120896604.4) provided by the prior art, which comprises a three-section elastic waist support structure, the three-section elastic waist support structure comprises a main waist support and two side wing waist supports, the inclination angle between the side wing waist support and the main waist support is 45°, which realizes multi-directional support for the waist, has a certain elasticity and fits the human waist curve design.

[0004] However, the above-mentioned scheme has the following problems: for users of different body types, the width of their waists also differs, but the side wing waist support in the above-mentioned scheme cannot rotate forward and backward relative to the main waist support, so that the curvature of the three-section elastic waist support structure cannot be applied to the waists of different users, and the versatility is poor. SUMMARY

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a waist piece gear adjusting mechanism and a seat, through the first and second articulation parts that are articulated with each other, the user can adjust the waist piece to the appropriate position according to the own needs, the versatility is good, and the first and second gaskets are connected through the first and second gaskets that are meshed with each other, when the second articulation part rotates, the teeth grooves on the first and second gaskets are sequentially meshed, so that the rotating adjusting operation of the waist piece has a gear feeling, and the waist piece can be fixed at the current position after rotating, stable support is provided for the waist of the user, and the stability is good.

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

[0007] In a first aspect, the application provides a lumbar support gear adjusting mechanism, comprising a lumbar support body and a left-right symmetrical lumbar pad arranged on the lumbar support body. The left and right ends of the lumbar support body are provided with cylindrical first hinge parts. The end of the lumbar pad close to the lumbar support body is provided with a cylindrical second hinge part. The first hinge part and the second hinge part are connected in an up-down manner and are hingedly connected to each other through a hinge mechanism, so that the lumbar pad can be flipped forward and backward relative to the lumbar support body in a horizontal direction. A first gear adjusting mechanism is arranged between the first hinge part and the second hinge part. The first gear adjusting mechanism comprises a first gasket arranged on the first hinge part and a second gasket arranged on the second hinge part. The first gasket and the second gasket are connected in an up-down manner, and the opposite end faces of the first gasket and the second gasket are each provided with a plurality of tooth grooves distributed in a circumferential direction. The first gasket and the second gasket are engaged with each other through the tooth grooves. When the second hinge part rotates relative to the first hinge part, the second gasket rotates relative to the first gasket, and the plurality of tooth grooves between the first gasket and the second gasket are sequentially engaged.

[0008] Further, a first elastic member is arranged between the first gasket and the first hinge part or between the second gasket and the second hinge part. The first elastic member is configured to exert an elastic force on the first gasket or the second gasket, so that the first gasket and the second gasket always have a tendency to be close to each other. This makes the rotation adjusting operation of the lumbar pad more stable and smooth.

[0009] Further, a first positioning mechanism is arranged between the first hinge part and the first gasket. The first positioning mechanism comprises a positioning protrusion and a first positioning groove that are clamped to each other. The positioning protrusion is arranged on one of the first gasket and the first hinge part, and the first positioning groove is arranged on the other one of the first gasket and the first hinge part, so that the first gasket and the first hinge part are fixed relative to each other in a circumferential direction. A second positioning mechanism is arranged between the second hinge part and the second gasket. The second positioning mechanism comprises a positioning protrusion and a second positioning groove that are clamped to each other. The positioning protrusion is arranged on one of the second gasket and the second hinge part, and the second positioning groove is arranged on the other one of the second gasket and the second hinge part, so that the second gasket and the second hinge part are fixed relative to each other in a circumferential direction. By arranging the first positioning mechanism and the second positioning mechanism, when the second hinge part rotates relative to the first hinge part, the second gasket can also be stably rotated relative to the first gasket, so that the rotation adjusting operation of the lumbar pad is more stable and smooth.

[0010] Further, the bottom end of the first hinge part is recessed to be provided with a first mounting slot, and the first gasket is clamped to the first hinge part through the first mounting slot; the top end of the second hinge part is recessed to be provided with a second mounting slot, and the second gasket is clamped to the second hinge part through the second mounting slot; the side wall of the first gasket and the side wall of the second gasket are both provided with a plurality of positioning protrusions, the slot wall of the first mounting slot is recessed to form a first positioning slot correspondingly, and the slot wall of the second mounting slot is also recessed to form a second positioning slot correspondingly. The first gasket is hidden inside the first hinge part, the second gasket is hidden inside the second hinge part, the connection strength is higher, and thus the overall stability of the lumbar piece gear adjusting mechanism is better.

[0011] In a second aspect, the application provides a lumbar piece gear adjusting mechanism, which comprises a lumbar body and a left-right symmetrically arranged lumbar piece arranged on the lumbar body. The left and right ends of the lumbar body are both provided with a third hinge part, and the end of the lumbar piece close to the lumbar body is provided with a sleeve-shaped fourth hinge part. One end of the upper and lower ends of the third hinge part extends along the vertical direction to form a column-shaped first rotating support part, and the hollow part of the fourth hinge part forms a first sleeve hole. The fourth hinge part is sleeved on the first rotating support part through the first sleeve hole and can rotate around the first rotating support part, so that the lumbar piece can be flipped forward and backward along the horizontal direction relative to the lumbar body. A second gear adjusting mechanism is arranged between the fourth hinge part and the first rotating support part. The second gear adjusting mechanism comprises a clamping head and a plurality of clamping slots which are clamped and matched with each other. The clamping head is arranged on one of the inner wall of the first sleeve hole and the side wall of the first rotating support part, and the plurality of clamping slots are arranged on the other one of the inner wall of the first sleeve hole and the side wall of the first rotating support part. When the fourth hinge part rotates relative to the first rotating support part, the clamping head is clamped and matched with the plurality of clamping slots in turn. The third hinge part and the fourth hinge part are connected in a sleeved manner, so that the lumbar piece rotates relative to the lumbar body. By arranging the clamping head and the clamping slots which are clamped and matched with each other, the rotation adjusting operation of the lumbar piece has a gear feeling, and the lumbar piece can be fixed at the current position after rotation, so that the stability is better.

[0012] Further, the first rotating support part is radially hollowed to form a first connecting slot, two clamping heads which are symmetrically arranged in front and back are arranged in the first connecting slot, and the two clamping heads are connected by a second elastic member, so that the two clamping heads can approach or move away from each other by the elastic deformation of the second elastic member. The inner wall of the first sleeve hole is recessed to form a plurality of clamping slots correspondingly. The connection strength between the fourth hinge part and the third hinge part is higher, the rotation adjusting operation is more stable, and the two groups of clamping heads can be clamped in the clamping slots by the elastic force of the second elastic member, so that the stability is better.

[0013] Further, the third hinge part is provided with a cylindrical second rotating support part on the side away from the first rotating support part, and the waist piece is provided with a sleeve-shaped fifth hinge part, which is respectively sleeved on the second rotating support part; the hollow part of the fifth hinge part forms a second sleeving hole, which is an oval-shaped special-shaped hole, and the second rotating support part is connected with a clamping head through a third elastic member; when the waist piece gradually flips backward relative to the waist rest body, the clamping head is squeezed by the fifth hinge part along the curved surface of the second sleeving hole, the elastic deformation amplitude of the third elastic member continuously increases, the reset elastic force of the clamping head on the inner wall of the second sleeving hole continuously increases, and the damping feeling of the fifth hinge part when rotating continuously increases. When facing a user with a larger body type, the waist piece is less likely to continue to rotate after being rotated to a relatively rear position, and can provide stable support for the user, so that the damping of the waist piece gear adjusting mechanism can adapt to users with different body types, and the practicability is better.

[0014] Further, the second rotating support part is provided with a second connecting groove formed in a radial direction, and the second connecting groove is provided with two clamping heads symmetrically arranged in front and back, and the two clamping heads are connected through a third elastic member, so that the two clamping heads can approach or move away from each other by the elastic deformation of the third elastic member. By arranging two groups of symmetric clamping heads to abut against the inner wall of the second sleeving hole, the connection strength between the fifth hinge part and the third hinge part is higher, and the rotating adjusting operation is more stable.

[0015] In a third aspect, the application provides a seat, which comprises a backrest and a waist piece gear adjusting mechanism, the backrest and the waist rest body are connected through a connecting piece, the waist rest body is hinged to the front end of the connecting piece, and the connecting piece and the waist rest body are provided with a fourth elastic member, so that the waist rest body always has a tendency to rotate forward relative to the connecting piece. The waist rest body can adjust the inclination angle to fit the waist of users of all types, and has better versatility; and by means of the elastic force of the fourth elastic member, the waist rest body can provide a more elastic support experience for the waist of the user, and has higher comfort.

[0016] Further, the connecting piece comprises a first connecting part and a second connecting part, the waist rest body is hinged to the first connecting part, the rear end of the second connecting part is connected to the backrest in a vertical direction, and the first connecting part is connected to the second connecting part in a horizontal direction, thereby driving the waist rest body to slide and adjust in the horizontal direction and the vertical direction relative to the backrest. Further improve the adjustment freedom of the waist rest body to ensure that it can be applied to users of all types, and further improve the versatility.

[0017] The waist piece gear adjusting mechanism and the seat are provided. The first hinge part and the second hinge part are hinged to each other, so that the waist piece on both sides of the waist support body can be adjusted by being flipped forward and backward, the user can adjust the waist piece to a suitable position according to the own demand, and the universality is better. The first gasket and the second gasket are connected by being engaged with each other between the first hinge part and the second hinge part, the teeth grooves on the first gasket and the second gasket are engaged in sequence when the second hinge part rotates, so that the rotating adjusting operation of the waist piece has a gear feeling, and the waist piece can be fixed at the current position after being rotated, so as to provide stable support for the waist of the user, and the stability is better.

[0018] In addition, the waist support body can be adjusted in the inclination angle, the vertical height and the horizontal depth relative to the chair back, so as to fit the waist of various users, the universality is better, and a more elastic support experience can be provided for the waist of the user, and the comfort is higher. BRIEF DESCRIPTION OF DRAWINGS

[0019] Other characteristics, objects and advantages of the present application will become more apparent after reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0020] Figure 1 The three-dimensional structure schematic diagram of the waist piece gear adjusting mechanism provided by the embodiment of the present application is provided.

[0021] Figure 2 The three-dimensional structure schematic diagram of the waist piece gear adjusting mechanism provided by the embodiment of the present application is provided.

[0022] Figure 3 The connection structure schematic diagram between the waist piece and the waist support body provided by the embodiment of the present application is provided.

[0023] Figure 4 The connection structure schematic diagram between the first hinge part and the first gasket provided by the embodiment of the present application is provided.

[0024] Figure 5 The connection structure schematic diagram between the second hinge part and the second gasket provided by the embodiment of the present application is provided.

[0025] Figure 6 The cross-sectional structure schematic diagram of the first hinge part and the second hinge part provided by the embodiment of the present application is provided.

[0026] Figure 7 The three-dimensional structure schematic diagram of the third hinge part, the fourth hinge part and the fifth hinge part provided by the embodiment of the present application is provided.

[0027] Figure 8 The connection structure schematic diagram between the third hinge part, the fourth hinge part and the fifth hinge part provided by the embodiment of the present application is provided.

[0028] Figure 9 A variation process schematic diagram when the fourth hinge part rotates is provided for the embodiment of the present application;

[0029] Figure 10 A variation process schematic diagram when the fifth hinge part rotates is provided for the embodiment of the present application;

[0030] Figure 11 A three-dimensional structure schematic diagram of the seat is provided for the embodiment of the present application;

[0031] Figure 12 A connection structure schematic diagram between the backrest and the lumbar body is provided for the embodiment of the present application;

[0032] Figure 13 A variation process schematic diagram when the lumbar body rotates is provided for the embodiment of the present application;

[0033] Figure 14 A variation process schematic diagram when the lumbar body adjusts the height and the depth is provided for the embodiment of the present application.

[0034] The reference signs are as follows: 1-lumbar body, 2-lumbar piece, 2a-front shell, 2b-rear shell, 3-first hinge part, 301-first installation slot, 302-first positioning slot, 303-first rotating hole, 310-axle body, 311-fastening screw, 4-second hinge part, 401-second installation slot, 402-second positioning slot, 403-second rotating hole, 404-installation hole, 410-first elastic member, 5a-first gasket, 5b-second gasket, 510-tooth groove, 520-positioning protrusion, 6-third hinge part, 610-first rotating support part, 611-clamp head, 612-first connection slot, 613-second elastic member, 620-second rotating support part, 621-third elastic member, 622-second connection slot, 630-fastening member, 7-fourth hinge part, 710-first sleeving hole, 711-clamping groove, 8-fifth hinge part, 810-second sleeving hole, 9-backrest, 910-linking member, 911-fourth elastic member, 912-first linking part, 913-second linking part. DETAILED DESCRIPTION

[0035] The present application will be further described in detail below in conjunction with 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, in order to facilitate the description, only the parts related to the utility model are shown in the drawings.

[0036] Please refer to the drawings Figures 1-14The embodiment of the present application provides a lumbar piece gear adjusting mechanism, which comprises a lumbar body 1, a left and right symmetrical lumbar piece 2 arranged on the lumbar body 1, a first cylindrical hinge part 3 arranged at the left and right ends of the lumbar body 1, a second cylindrical hinge part 4 arranged at one end of the lumbar piece 2 close to the lumbar body 1, and a first gear adjusting mechanism arranged between the first hinge part 3 and the second hinge part 4. The first hinge part 3 and the second hinge part 4 are connected by a hinge mechanism and are hingedly connected to each other, so that the lumbar piece 2 can be flipped forward and backward along the horizontal direction relative to the lumbar body 1. The first gear adjusting mechanism comprises a first gasket 5a arranged on the first hinge part 3 and a second gasket 5b arranged on the second hinge part 4. The first gasket 5a and the second gasket 5b are connected in a vertical direction, and the opposite end faces of the first gasket 5a and the second gasket 5b are provided with a plurality of tooth grooves 510 distributed in a circumferential direction. The first gasket 5a and the second gasket 5b are engaged with each other through the tooth grooves 510. When the second hinge part 4 rotates relative to the first hinge part 3, the second gasket 5b rotates relative to the first gasket 5a, and the plurality of tooth grooves 510 between the first gasket 5a and the second gasket 5b are sequentially engaged.

[0037] In the embodiment, the first hinge part 3 and the second hinge part 4 are hingedly connected to each other, so that the lumbar pieces 2 on both sides of the lumbar body 1 can be flipped forward and backward for adjustment. Users can adjust the lumbar pieces 2 to appropriate positions according to their own needs, and the universality is good. In addition, the first hinge part 3 and the second hinge part 4 are connected through the first gasket 5a and the second gasket 5b which are engaged with each other. When the second hinge part 4 rotates, the tooth grooves 510 on the first gasket 5a and the second gasket 5b are sequentially engaged, so that the rotation adjustment operation of the lumbar piece 2 has a gear feeling, and the lumbar piece 2 can be fixed at the current position after rotation, thereby providing stable support for the waist of the user, and the stability is good.

[0038] The hinge mechanism comprises a shaft body 310 and a fastening screw 311. A first rotating hole 303 is formed in the first hinge part 3 in a vertical direction, and a second rotating hole 403 is formed in the second hinge part 4 in a vertical direction. The shaft body 310 penetrates through the first rotating hole 303 and the second rotating hole 403, so that the first hinge part 3 and the second hinge part 4 can rotate around the shaft body 310. In addition, the diameter of the upper end of the shaft body 310 is greater than that of the first rotating hole 303 and the second rotating hole 403. The lower end of the shaft body 310 penetrates out of the second rotating hole and is screw-connected with the fastening screw 310, so that the shaft body 310, the first hinge part 3 and the second hinge part 4 are relatively fixed in the vertical direction and the horizontal direction, and the shaft body 310 is convenient to install and disassemble.

[0039] The first hinge part 3 is formed by extending from the left and right ends of the lumbar body 1 and is integrally formed with the lumbar body 1, the lumbar piece 2 is of a split structure and comprises a front shell 2a and a rear shell 2b which are spliced with each other, the second hinge part 4 is detachably arranged on the rear shell 2b by means of screw connection and is covered between the front shell 2a and the rear shell 2b and is not easy to be exposed, which not only makes the dismounting operation between the second hinge part 4 and the lumbar piece 2 more convenient, but also makes the first hinge part 3 and the second hinge part 4 both hidden in the lumbar piece 2, so that the overall appearance of the lumbar is more simple and beautiful.

[0040] Please refer to the accompanying drawings Figures 5-6 In some embodiments of the present application, a first elastic member 410 is arranged between the first hinge part 3 and the first pad 5a or between the second hinge part 4 and the second pad 5b, and the first elastic member 410 is configured to apply elastic force to the first pad 5a or the second pad 5b, so that the first pad 5a and the second pad 5b always have a tendency to be close to each other.

[0041] In the present embodiment, the tooth groove 510 is a wavy curved groove, and by arranging the first elastic member 410, when the second hinge part 4 rotates, the first pad 5a and the second pad 5b have a tendency to move away from each other along the curved surface of the tooth groove 510, the second pad 5b can move downward and rotate relative to the first pad 5a by means of the deformation of the first elastic member 410, and the second pad 5b can move back to the first pad 5a and mesh with each other after rotating by means of the reset elastic force of the first elastic member 410. Thus, the rotating adjustment operation of the lumbar piece 2 is more stable and smooth.

[0042] Preferably, the first elastic member 410 is a spring, which is small in structure and easy to install, the second hinge part 4 is recessed and provided with a mounting hole 404 for mounting the first elastic member 410, and the diameter of the mounting hole 404 is greater than that of the second rotating hole 403, so that the first elastic member 410 can stably abut against the hole bottom of the mounting hole 404, and the shaft body 310 passes through the first elastic member 410, without affecting the rotating adjustment of the second hinge part 4. Of course, in other embodiments of the present application, the first elastic member 410 can also be a spring piece, rubber or other elastic materials, and the first elastic member 410 can also be mounted on the first hinge part 3 and push the first pad 5a.

[0043] Please refer to the accompanying drawings Figures 4-5In some embodiments of the present application, a first positioning mechanism is arranged between the first hinge part 3 and the first gasket 5a, the first positioning mechanism comprising a positioning protrusion 520 and a first positioning slot 302 that are clamped to each other, the positioning protrusion 520 being arranged on one of the first gasket 5a and the first hinge part 3, and the first positioning slot 302 being arranged on the other one of the first gasket 5a and the first hinge part 3, so that the first gasket 5a and the first hinge part 3 are fixed relative to each other in the circumferential direction; a second positioning mechanism is arranged between the second hinge part 4 and the second gasket 5b, the second positioning mechanism comprising a positioning protrusion 520 and a second positioning slot 402 that are clamped to each other, the positioning protrusion 520 being arranged on one of the second gasket 5b and the second hinge part 4, and the second positioning slot 402 being arranged on the other one of the second gasket 5b and the second hinge part 4, so that the second gasket 5b and the second hinge part 4 are fixed relative to each other in the circumferential direction. By arranging the first positioning mechanism and the second positioning mechanism, when the second hinge part 4 rotates relative to the first hinge part 3, the second gasket 5b can also be driven to stably rotate relative to the first gasket 5a, so that the rotation adjustment operation of the waist piece 2 is more stable and smooth.

[0044] Please refer to the accompanying drawings Figures 4-5 In some embodiments of the present application, a first mounting slot 301 is arranged at the bottom end of the first hinge part 3, and the first gasket 5a is clamped to the first hinge part 3 through the first mounting slot 301; a second mounting slot 401 is arranged at the top end of the second hinge part 4, and the second gasket 5b is clamped to the second hinge part 4 through the second mounting slot 401; a plurality of positioning protrusions 520 are arranged on the side walls of the first gasket 5a and the second gasket 5b, a first positioning slot 302 is formed in the slot wall of the first mounting slot 301, and a second positioning slot 402 is also formed in the slot wall of the second mounting slot 401. The first gasket 5a is hidden inside the first hinge part 3, and the second gasket 5b is hidden inside the second hinge part 4, so that the connection strength is higher, and the overall stability of the waist piece gear adjustment mechanism is better.

[0045] Preferably, two positioning protrusions 520 are arranged on the side walls of the first gasket 5a and the second gasket 5b, two first positioning slots 302 are arranged in the first mounting slot 301, and two second positioning slots 402 are arranged in the second mounting slot 401, so as to further improve the connection strength.

[0046] In the present application, other connection structures can also be arranged between the waist piece 2 and the waist rest body 1.

[0047] Please refer to the accompanying drawings Figures 7-10The embodiment of the application also provides a lumbar piece gear adjusting mechanism, which comprises a lumbar body 1 and a left and right symmetrical lumbar piece 2 arranged on the lumbar body 1, the left and right ends of the lumbar body 1 are provided with third hinge parts 6, one end of the third hinge part 6 at the upper and lower ends is extended along the vertical direction to form a first rotating support part 610 in the shape of a column, the hollow part of the fourth hinge part 7 forms a first sleeve hole 710, the fourth hinge part 7 is sleeved on the first rotating support part 610 through the first sleeve hole 710 and can rotate around the first rotating support part 610, so that the lumbar piece 2 can be flipped forward and backward along the horizontal direction relative to the lumbar body 1, and a second gear adjusting mechanism is arranged between the fourth hinge part 7 and the first rotating support part 610, the second gear adjusting mechanism comprises a clamping head 611 and a plurality of clamping grooves 711 which are clamped and matched with each other, the clamping head 611 is arranged on one of the inner wall of the first sleeve hole 710 and the side wall of the first rotating support part 610, and the plurality of clamping grooves 711 are arranged on the other one of the inner wall of the first sleeve hole 710 and the side wall of the first rotating support part 610, when the fourth hinge part 7 rotates relative to the first rotating support part 610, the clamping head 611 is clamped and matched with the plurality of clamping grooves 711 in turn.

[0048] In the embodiment, the third hinge part 6 and the fourth hinge part 7 are connected in a sleeving mode, the fourth hinge part 7 rotates around the first rotating support part 610 and drives the lumbar piece 2 to rotate relative to the lumbar body 1, and the clamping head 611 and the clamping groove 711 are arranged in a clamped and matched mode, the clamping head 611 moves among the plurality of clamping grooves 711 with the rotation of the lumbar piece 2, so that the rotation adjusting operation of the lumbar piece 2 has a gear feeling, and the lumbar piece 2 can be fixed at the current position after rotation and has good stability.

[0049] Please refer to the accompanying drawings Figures 8-9 In some embodiments of the application, a first connecting groove 612 is formed in the radial hollow mode on the first rotating support part 610, two clamping heads 611 which are symmetrical in front and back are arranged in the first connecting groove 612, and the two clamping heads 611 are connected through a second elastic member 613, so that the two clamping heads 611 can approach or move away from each other by virtue of the elastic deformation of the second elastic member 613, and the inner wall of the first sleeve hole 710 is recessed to form a plurality of clamping grooves 711.

[0050] In the embodiment, the two groups of symmetrical clamping heads 611 and clamping grooves 711 are arranged in a clamped and matched mode, so that the connection strength between the fourth hinge part 7 and the third hinge part 6 is higher, the rotation adjusting operation is more stable, and the two groups of clamping heads 611 can be clamped in the clamping grooves 711 by virtue of the elastic force of the second elastic member 613, so that the stability is better.

[0051] Please refer to the accompanying drawings Figures 7-10In some embodiments of the present application, a cylindrical second rotating support portion 620 is arranged on the third hinge portion 6 away from the first rotating support portion 610, and a sleeve-shaped fifth hinge portion 8 is arranged on the waist piece 2 and is sleeved on the second rotating support portion 620; a hollow part of the fifth hinge portion 8 forms a second sleeve hole 810, which is an oval-shaped special-shaped hole, and a clamping head 611 is connected to the second rotating support portion 620 through a third elastic member 621; when the waist piece 2 is gradually flipped backward relative to the waist rest body 1, the clamping head 611 is squeezed by the fifth hinge portion 8 along the curved surface of the second sleeve hole 810, the elastic deformation amplitude of the third elastic member 621 continuously increases, the resetting elastic force exerted by the clamping head 611 on the inner wall of the second sleeve hole 810 continuously increases, and the damping feeling of the fifth hinge portion 8 during rotation continuously increases.

[0052] In the present embodiment, for users with larger body size and heavier weight, the waist is wider, and the waist piece 2 needs to be rotated to a relatively rear position, but for such users, the pressure exerted by the waist on the waist piece 2 is greater, which causes the waist piece 2 to be easily rotated after bearing a larger pressure, resulting in a weaker supporting force of the waist piece 2 on the waist of the user and a poorer experience. Therefore, by connecting the fifth hinge portion 8 and the second rotating support portion 620, the second sleeve hole 810 is an oval-shaped special-shaped hole, and as the fifth hinge portion 8 rotates, the end with a larger wall thickness of the second sleeve hole 810 gradually approaches the clamping head 611, thereby squeezing the third elastic member 621 and increasing the damping feeling of the fifth hinge portion 8 during rotation. Thus, the more the waist piece 2 rotates backward, the greater the damping feeling during rotation, so that when facing a user with a larger body size, the waist piece 2 is less likely to continue to rotate after being rotated to a relatively rear position, and can provide stable support for the user, so that the damping of the waist piece gear adjusting mechanism can adapt to users with different body sizes, and the practicality is better.

[0053] Please refer to the accompanying drawings Figure 10 In some embodiments of the present application, a second connecting groove 622 is formed in the second rotating support portion 620 in a radial direction, two clamping heads 611 symmetrically arranged in front and back are arranged in the second connecting groove 622, and the two clamping heads 611 are connected through a third elastic member 621, so that the two clamping heads 611 can approach or move away from each other by the elastic deformation of the third elastic member 621. By arranging two groups of symmetric clamping heads 611 to abut against the inner wall of the second sleeve hole 810, the connection strength between the fifth hinge portion 8 and the third hinge portion 6 is higher, and the rotating adjustment operation is more stable.

[0054] The upper end of the first rotating support part 610 and the lower end of the second rotating support part 620 are screw-connected with a fastener 630, the diameter of the fastener 630 is greater than the fourth hinge part 7 and the fifth hinge part 8, so that the third hinge part 6, the fourth hinge part 7 and the fifth hinge part 8 are relatively fixed in the vertical direction, the stability is good, and the assembly is more convenient.

[0055] Please refer to the accompanying drawings Figures 11-14 The embodiment of the application further provides a seat, which comprises a backrest 9 and a lumbar piece gear adjusting mechanism, the backrest 9 and the lumbar body 1 are connected through a connecting piece 910, the lumbar body 1 is hinged to the front end of the connecting piece 910, and the fourth elastic piece 911 is arranged between the connecting piece 910 and the lumbar body 1, so that the lumbar body 1 always has a tendency to rotate forward relative to the connecting piece 910.

[0056] In the embodiment, the waist shapes of different users are different in size, the lumbar body 1 is rotatably connected to the connecting piece 910, so that the lumbar body 1 can adjust the inclination angle to fit the waists of various users, and the versatility is better; and the lumbar body 1 can provide a more elastic support experience for the waist of the user by the elastic force of the fourth elastic piece 911, and the comfort is higher.

[0057] Please refer to the accompanying drawings Figures 13-14 In some embodiments of the application, the connecting piece 910 comprises a first connecting part 912 and a second connecting part 913, the lumbar body 1 is hinged to the first connecting part 912, the rear end of the second connecting part 913 is slidingly connected to the backrest 9 in the vertical direction, and the first connecting part 912 is slidingly connected to the second connecting part 913 in the horizontal direction, so as to drive the lumbar body 1 to slide and adjust in the horizontal direction and the vertical direction relative to the backrest 9. The adjusting freedom of the lumbar body 1 is further improved, so that it can be applied to users of various body shapes, and the versatility is further improved.

[0058] The sliding adjusting mechanism between the first connecting part 912 and the second connecting part 913 and between the second connecting part 913 and the backrest 9 adopts a circulating gear structure, which is convenient to adjust and has a gear feeling, and the patent will not be described in detail.

[0059] 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.

[0060] 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. A lumbar support gear adjustment mechanism, characterized by, The application relates to a lumbar support body (1) and a left-right symmetrical lumbar piece (2) arranged on the lumbar support body (1), wherein the left and right ends of the lumbar support body (1) are provided with cylindrical first hinge parts (3), one end of the lumbar piece (2) close to the lumbar support body (1) is provided with a cylindrical second hinge part (4), the first hinge part (3) and the second hinge part (4) are connected in sequence and are hingedly connected with each other through a hinge mechanism, so that the lumbar piece (2) can be flipped forward and backward along the horizontal direction relative to the lumbar support body (1); a first gear adjusting mechanism is arranged between the first hinge part (3) and the second hinge part (4), the first gear adjusting mechanism comprises a first gasket (5a) arranged on the first hinge part (3) and a second gasket (5b) arranged on the second hinge part (4), the first gasket (5a) and the second gasket (5b) are connected in sequence, and the opposite end faces of the first gasket (5a) and the second gasket (5b) are provided with a plurality of tooth grooves (510) distributed in the circumferential direction, and the first gasket (5a) and the second gasket (5b) are engaged with each other through the tooth grooves (510); when the second hinge part (4) rotates relative to the first hinge part (3), the second gasket (5b) rotates relative to the first gasket (5a), and a plurality of tooth grooves (510) between the first gasket (5a) and the second gasket (5b) are sequentially engaged.

2. The lumbar segment gear adjustment mechanism of claim 1, wherein, A first elastic member (410) is arranged between the first gasket (5a) and the first hinge part (3) or between the second gasket (5b) and the second hinge part (4), the first elastic member (410) is configured to apply elastic force to the first gasket (5a) or the second gasket (5b), so that the first gasket (5a) and the second gasket (5b) always have the tendency of being close to each other.

3. The lumbar pad position adjustment mechanism of claim 1, wherein, A first positioning mechanism is arranged between the first hinge part (3) and the first gasket (5a), the first positioning mechanism comprises a positioning protrusion (520) and a first positioning groove (302) which are clamped with each other, the positioning protrusion (520) is arranged on one of the first gasket (5a) and the first hinge part (3), and the first positioning groove (302) is arranged on the other one of the first gasket (5a) and the first hinge part (3), so that the first gasket (5a) and the first hinge part (3) are fixed relative to each other in the circumferential direction; a second positioning mechanism is arranged between the second hinge part (4) and the second gasket (5b), the second positioning mechanism comprises a positioning protrusion (520) and a second positioning groove (402) which are clamped with each other, the positioning protrusion (520) is arranged on one of the second gasket (5b) and the second hinge part (4), and the second positioning groove (402) is arranged on the other one of the second gasket (5b) and the second hinge part (4), so that the second gasket (5b) and the second hinge part (4) are fixed relative to each other in the circumferential direction.

4. The lumbar pad gear adjustment mechanism of claim 3, wherein, The bottom end of the first hinge part (3) is recessed to be provided with a first mounting slot (301), the first gasket (5a) is clamped to the first hinge part (3) through the first mounting slot (301); the top end of the second hinge part (4) is recessed to be provided with a second mounting slot (401), the second gasket (5b) is clamped to the second hinge part (4) through the second mounting slot (401); the sidewall of the first gasket (5a) and the second gasket (5b) is provided with a plurality of positioning protrusions (520), the sidewall of the first mounting slot (301) is recessed to be correspondingly provided with a first positioning slot (302), and the sidewall of the second mounting slot (401) is also recessed to be correspondingly provided with a second positioning slot (402).

5. A lumbar pad height adjustment mechanism characterized by, The waist support body (1) is provided with a third hinge part (6) at the left end and the right end, and the waist piece (2) is provided with a sleeve-shaped fourth hinge part (7) at one end close to the waist support body (1). One end of the upper end and the lower end of the third hinge part (6) extends in the vertical direction to form a column-shaped first rotating support part (610), and the hollow part of the fourth hinge part (7) forms a first sleeve hole (710). The fourth hinge part (7) is sleeved on the first rotating support part (610) through the first sleeve hole (710) and can rotate around the first rotating support part (610), so that the waist piece (2) can be flipped forward and backward relative to the waist support body (1) in the horizontal direction. A second gear adjusting mechanism is arranged between the fourth hinge part (7) and the first rotating support part (610), and the second gear adjusting mechanism comprises a clamping head (611) and a plurality of clamping grooves (711) which are clamped and matched with each other. The clamping head (611) is arranged on one of the inner wall of the first sleeve hole (710) and the sidewall of the first rotating support part (610), and the plurality of clamping grooves (711) are arranged on the other one of the inner wall of the first sleeve hole (710) and the sidewall of the first rotating support part (610). When the fourth hinge part (7) rotates relative to the first rotating support part (610), the clamping head (611) is clamped and matched with the plurality of clamping grooves (711) in sequence.

6. The lumbar segment gear adjustment mechanism of claim 5, wherein, The first rotating support part (610) is radially hollow to form a first connecting slot (612), the first connecting slot (612) is provided with two clamping heads (611) which are symmetrically arranged in front and back, and the two clamping heads (611) are connected through a second elastic member (613), so that the two clamping heads (611) can approach or move away from each other by elastic deformation of the second elastic member (613). The inner wall of the first sleeve hole (710) is recessed to form the plurality of clamping grooves (711).

7. The lumbar pad position adjustment mechanism of claim 5, wherein, The third hinge part (6) is further provided with a cylindrical second rotating supporting part (620) on the side away from the first rotating supporting part (610), and the waist piece (2) is further provided with a sleeve-shaped fifth hinge part (8), which is sleeved with the second rotating supporting part (620) respectively; the hollow part of the fifth hinge part (8) forms a second sleeving hole (810), which is an oval-shaped special-shaped hole, and the second rotating supporting part (620) is connected with a clamping head (611) through a third elastic member (621); when the waist piece (2) gradually flips backward relative to the waist rest body (1), the clamping head (611) is extruded by the fifth hinge part (8) along the curved surface of the second sleeving hole (810), the elastic deformation amplitude of the third elastic member (621) continuously increases, the reset elastic force exerted by the clamping head (611) on the inner wall of the second sleeving hole (810) continuously increases, and the damping feeling of the fifth hinge part (8) during rotation continuously increases.

8. The lumbar segment adjustment mechanism of claim 7, wherein, The second rotating supporting part (620) is radially hollowed out to form a second connecting groove (622), the second connecting groove (622) is provided with two clamping heads (611) which are symmetrically arranged front and back, and the two clamping heads (611) are connected through a third elastic member (621), so that the two clamping heads (611) can approach or move away from each other by means of the elastic deformation of the third elastic member (621).

9. A seat, characterized by The chair back (9) and the waist rest body (1) are connected through a connecting piece (910), the waist rest body (1) is hinged to the front end of the connecting piece (910), and a fourth elastic member (911) is arranged between the connecting piece (910) and the waist rest body (1), so that the waist rest body (1) always has a tendency to rotate forward relative to the connecting piece (910).

10. A seat according to claim 9, wherein The connecting piece (910) comprises a first connecting part (912) and a second connecting part (913), the waist rest body (1) is hinged to the first connecting part (912), the rear end of the second connecting part (913) is connected to the chair back (9) in a sliding manner along the vertical direction, and the first connecting part (912) is connected to the second connecting part (913) in a sliding manner along the horizontal direction, thereby driving the waist rest body (1) to slide and adjust along the horizontal direction and the vertical direction relative to the chair back (9).

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