CN218164661U - Waist back and waist supporting adjusting device - Google Patents

Abstract

The utility model discloses a waist support and waist pushing adjusting device, which comprises a waist support piece arranged on a waist support bracket; the waist support piece has elasticity, and the upper end and the lower end of the waist support piece are respectively matched with the waist support frame in a rotating way; the lower part of the waist rest bracket is provided with a sliding support part, and the front end of the sliding support part is connected with a sliding seat in a sliding way; a gear adjusting mechanism is arranged between the sliding seat and the sliding support part; the gear adjusting mechanism comprises an annular guide groove concavely arranged on the sliding supporting part and gear adjusting teeth positioned in the annular guide groove; a positioning clamping groove is formed in one side of the gear adjusting gear; an adjusting piece which always keeps straight is arranged in the sliding seat, and a clamping pin is arranged on the adjusting piece; in the process of lifting the sliding seat, the clamping pin moves upwards along the annular guide groove and can be clamped in the positioning clamping groove under the aligning acting force of the adjusting piece; in the descending and resetting process of the sliding seat, the bayonet pins move downwards along the annular guide groove to reset; the lower end of the waist support piece is rotatably connected to the sliding seat; the action slide seat is lifted and adjusted to enable the lumbar support piece to be deformed to be pushed forwards or retracted backwards.

Description

Waist back and waist supporting adjusting device

Technical Field

The utility model relates to a thing to sit on field, in particular to waist leans on top waist adjusting device.

Background

Sub-health is always a living problem concerned by people, wherein the lumbar vertebra problem brought to people by long-time sitting is particularly frequent, and the chair is used as daily furniture for office work and study of people, and under the long-time sitting and office work, the spine of the human body has natural bending, especially bending at the lumbar vertebra; the lumbar vertebra is easy to bend outwards when being in a sitting posture for a long time, and the isosceles lumbar disc herniation is easy to cause. As is well known, the spine of a human body is S-shaped, and for this reason, a waist rest capable of supporting the waist is additionally arranged at the backrest of part of office chairs so as to support the natural bending part of the lumbar vertebra, prevent the lumbar vertebra from bending outwards due to fatigue and ensure the health of the lumbar vertebra of office staff.

However, in actual use, users have different requirements on the waist supporting degree of the waist support in different use states; if the user is in an office state, the body is relatively straight, and the waist rest needs to be pushed out a little more forwards to keep a correct sitting position; when the user reclines to rest, the user leans backwards on the chair back, and the ejection function of the waist support is not obvious. Moreover, because people's bodily form demonstrates the diversified distribution of tall and short fat thin, the waist of fixed position leans on also hardly to be adapted to the crowd of different bodily forms, can not lean on the back to carry out the regulation of front and back degree of depth in order to satisfy individual difference, and its application scope and health care effect have all received the restriction.

The existing chairs with the adjustable waist back front-back depth can provide proper support for the waist of a user by adjusting the waist back front-back depth. However, in order to realize the ejection function of the lumbar support, a complicated mechanism is often arranged between the lumbar support and the chair back of the existing lumbar support adjusting device on the market, and if the lumbar support is adjusted in a worm gear manner, the structure is complicated, the operation is time-consuming and labor-consuming, and the lumbar support can be adjusted back and forth by rotating for multiple turns; or the pull wire is adopted to control the ejection degree of the waist rest, and the adjustment is also laborious; the two structures have the defects of complicated structure and inconvenient operation; the user is required to leave the sitting surface during adjustment.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provide a waist back and waist supporting adjusting device; the upper end of the waist support piece is rotatably connected to the waist support bracket, and the lower end of the waist support piece is rotatably connected to the sliding seat; the sliding seat can be adjusted in a lifting way along the waist rest bracket; then the lower end of the waist support piece can be driven to move up and down by the lifting adjustment of the action sliding seat, so that the waist support piece correspondingly generates elastic deformation along the longitudinal direction to be ejected forwards or retracted backwards, and the waist ejecting degree of the waist support piece is controlled; the operation is very convenient.

The technical scheme of the utility model is realized like this:

a lumbar support lumbar adjustment device comprising: a lumbar support configured to be mounted on the back support; the waist support is arranged on the waist support bracket; the waist support piece has elasticity, the middle position of the waist support piece arches forwards, and the upper end and the lower end of the waist support piece are respectively matched with the waist support frame in a rotating mode; the sliding seat is arranged on the waist rest bracket in a sliding manner; the lower part of the waist support is provided with a longitudinal sliding support part, and the sliding seat is connected to the front end of the sliding support part in a sliding way; a gear adjusting mechanism is arranged between the sliding seat and the sliding support part; the gear adjusting mechanism comprises an annular guide groove concavely arranged on the end surface of the sliding supporting part and gear adjusting teeth arranged in the annular guide groove; one side of the gear adjusting gear is provided with positioning clamping grooves which are longitudinally spaced; a longitudinal adjusting piece capable of deflecting left and right is arranged in the sliding seat, and a clamping pin which is protrudingly matched in the annular guide groove and can be clamped with the positioning clamping groove is arranged on the adjusting piece; the adjusting piece always has the tendency of keeping straight; in the process of the sliding seat rising, the clamping pins move upwards along the annular guide groove and can be sequentially clamped in the positioning clamping grooves under the aligning action of the adjusting piece; in the descending and resetting process of the sliding seat, the bayonet pins move downwards along the annular guide groove to reset; the lower end of the waist support piece is rotatably connected to the sliding seat; the lower end of the waist support piece can be driven to move up and down by the action slide seat through lifting adjustment, and the waist support piece correspondingly generates elastic deformation along the longitudinal direction so as to be ejected forwards or retracted backwards.

Preferably, the annular guide groove comprises a rising channel at one side of the gear adjusting tooth with the positioning clamping groove and a reset channel at the other side of the gear adjusting tooth; in the process of ascending the sliding seat, the adjusting piece deflects towards one side of the ascending channel, and the clamping pins move upwards along the ascending channel and can be sequentially clamped into the positioning clamping grooves at different positions under the action of returning the adjusting piece; during the sliding seat descending and resetting process, the adjusting piece is deflected to one side towards the resetting groove channel from the ascending groove channel, and the clamping pin descends along the resetting groove channel to reset. The slide seat can be lifted up and lowered down to reset by moving the clamping pin for a circle along the annular guide groove; the lifting adjustment of the sliding seat is stable; and in the ascending process, the clamping pins are clamped with the positioning clamping grooves at different positions, so that the sliding seat is provided with a plurality of adjusting gears.

Preferably, a containing groove for containing the adjusting piece is arranged in the sliding seat; the lower end of the adjusting piece is rotatably connected in the accommodating groove, and the bayonet lock is arranged at the upper end of the adjusting piece and is backwards clamped in the annular guide groove; elastic pieces which are transversely arranged are respectively arranged on the two sides of the adjusting piece; one end of each elastic piece is connected with the side end of the adjusting piece, and the other end of each elastic piece is connected with the side wall of the accommodating groove; the elastic member can be elastically deformed in response to the deflection motion of the adjusting member to provide an elastic force for the adjusting member to return to the straight state again. The adjusting piece is hidden in the sliding seat, so that the structure is attractive; and under the action of the elastic piece, the adjusting piece always has the tendency of returning to the positive reset after deflecting.

Preferably, from bottom to top, the lower end and the upper end of the gear adjusting tooth are both inclined edges which are inclined upwards in the direction of the upwards-rising channel. When the sliding seat is lifted, the adjusting piece can automatically deflect to one side of the lifting channel; when the sliding seat is lowered and reset, the adjusting piece can automatically deflect to one side of the reset channel from the ascending channel.

Preferably, the left side and the right side of the upper end of the lumbar support are respectively provided with an upper rotating support which is used for being rotatably connected with the lumbar support; the lower end of the waist support piece is provided with a lower rotating support which is arranged at the left and the right at intervals and is used for being rotationally connected with the sliding seat. So that the waist support piece and the waist support are connected in a three-point triangular manner, and the connecting structure is stable.

Preferably, the upper end of the waist rest support is provided with support arms respectively extending towards two sides, and the end parts of the support arms are provided with rotary mounting seats; the rotation mount is configured to be rotatably connected with the upper rotation support. When the waist support supporting piece is elastically deformed, the upper rotating support seat can rotate relative to the support arm so as to avoid the fracture of the joint; and the support arms at the two sides are respectively connected with the waist support piece, so that the waist support piece is stably connected.

Preferably, the two lower rotating supports are arranged at the middle position of the lower end of the lumbar support; the sliding seat is clamped between the two lower rotating supports, and two sides of the sliding seat are respectively connected with the lower rotating supports in a rotating mode. Thereby the lower end of the lumbar support can be stably connected on the sliding seat.

Preferably, the lumbar support comprises a lumbar skeleton with a frame structure and two side lumbar support bodies which are connected to the front end of the lumbar skeleton and are arranged side by side left and right; the waist rest framework is of a bilateral symmetry structure and comprises longitudinal strip-shaped side rods respectively positioned on the left side and the right side, a lower cross rod respectively arranged at the bottom of each strip-shaped side rod and an upper cross rod respectively arranged at the upper end of each strip-shaped side rod; the rear end of each side waist supporting body is provided with an upper caulking groove, a side caulking groove and a lower caulking groove which can be matched with the upper cross rod, the strip-shaped side rods and the lower cross rod respectively.

Preferably, the waist support framework is made of nylon; the side waist support body is made of a tpu soft rubber material. The waist rest framework is of a frame type structure made of nylon materials, has good toughness, can provide support and can effectively generate elastic deformation in the vertical direction; the side waist support body is made of TPU soft rubber, so that the side waist support body is easy to deform and has good ductility; the waist support piece formed by combining the waist support piece and the waist support piece can keep the whole shape of the waist support, and the deformation effect of the waist support piece in the vertical direction is good, so that the process of adjusting the waist supporting degree is easy and labor-saving.

Preferably, the left side and the right side of the sliding support part are respectively provided with a guide groove in a concave manner, and two sides of the rear end of the sliding seat are correspondingly provided with guide strips extending towards the center of the sliding seat; the guide bar is embedded in the guide groove in a sliding manner. The guide strip is in sliding fit with the guide groove and can limit the sliding seat from being separated from the sliding support part back and forth.

Adopted above-mentioned technical scheme the utility model discloses a design departure point, theory and beneficial effect are:

firstly, in the waist rest and waist supporting adjusting device of the utility model, the upper end of a waist rest supporting piece is rotationally connected to a waist rest bracket, and the lower end of the waist rest supporting piece is rotationally connected to a sliding seat; a gear adjusting mechanism is arranged between the sliding seat and the sliding support part, so that the sliding seat can be adjusted in a lifting way along the sliding support part and has a multi-gear adjusting position; then the lower end of the waist support piece can be driven to ascend by the ascending of the action sliding seat, so that the waist support piece is correspondingly elastically deformed along the longitudinal direction to be ejected forwards, and the waist support piece also has a multi-gear waist ejecting state; the waist support can be retracted backwards by descending and resetting the seat sliding seat; thereby being capable of conveniently adjusting the waist supporting degree of the waist support piece.

In addition, the gear adjusting mechanism between the sliding seat and the sliding support part can realize the ascending adjustment and descending reset of the sliding seat by moving the bayonet lock for one circle along the annular guide groove; the lifting adjustment of the sliding seat is stable; in the ascending process, the clamping pins move upwards along the ascending channel and can be sequentially clamped into the positioning clamping grooves at different positions under the action of the aligning of the adjusting piece; the sliding seat can be automatically locked at any adjusting position without additionally arranging a locking mechanism, and the structural design is ingenious. Then, the user only needs to directly apply acting force to the sliding seat to enable the sliding seat to move up and down, so that the position of the sliding seat can be adjusted, the user does not need to leave the seat surface for adjustment, and the operation is light and convenient.

Secondly, the upper end of the waist support piece is rotationally connected with the support arm, and the lower end of the waist support piece is rotationally connected with the sliding seat; thereby causing the lumbar support to elastically deform in the longitudinal direction; the joint of the upper end and the lower end can rotate in a self-adaptive manner, so that the joint is prevented from being broken under stress; the structure design is ingenious.

Furthermore, the waist support piece comprises a waist support frame with a frame type structure and two side waist support bodies which are connected to the front end of the waist support frame and are arranged side by side left and right; the waist rest framework is in front-back butt joint with the side waist support body and is embedded in the side waist support body; the waist rest framework is of a frame type structure made of nylon materials, has good toughness, can provide support and can effectively generate elastic deformation in the vertical direction; the side waist support body is made of TPU soft rubber, is easy to deform and has good ductility; the waist support piece formed by combining the waist support piece and the waist support piece can keep the whole shape of the waist support, and the deformation effect of the waist support piece in the vertical direction is good, so that the process of adjusting the waist supporting degree is easy and labor-saving. If the lumbar support is a one-piece construction, the deformation is laborious, resulting in laborious adjustment operations.

Drawings

Fig. 1 is a side view of a lumbar support in an embodiment of the present invention mounted on a back support;

fig. 2 is a side view of the assembly of a lumbar support and a lumbar support bracket in an embodiment of the present invention;

fig. 3 is a schematic back side three-dimensional structure diagram of the lumbar support member and the lumbar support bracket according to the embodiment of the present invention;

fig. 4 is a schematic front perspective view of the lumbar support member and the lumbar support bracket according to the embodiment of the present invention;

fig. 5 is a schematic perspective view of the waist support frame and the side waist support body according to the embodiment of the present invention;

fig. 6 is a schematic perspective view of another angle of the waist support frame and the side waist support body according to the embodiment of the present invention;

fig. 7 is a schematic perspective view of a lumbar support according to an embodiment of the present invention;

fig. 8 is a schematic perspective view illustrating a sliding fit between the sliding base and the sliding support portion according to an embodiment of the present invention;

fig. 9 is a schematic perspective view of the adjusting member and the annular guide groove according to the embodiment of the present invention;

fig. 10 is a schematic perspective view of the adjusting member inside the slide seat according to the embodiment of the present invention;

fig. 11 is a schematic perspective view of an annular guide groove according to an embodiment of the present invention.

The figures are numbered: a back support 1; a lumbar support 31; a lumbar support bracket 32; the slide support portion 32a; a slide 33; a support arm 34; a rotary mounting seat 34a; an upper rotating support 35; a lumbar support frame 311; a side waist support 312; bar-shaped side bars 36; a lower cross bar 37; an upper cross bar 38; a support rail 39; the rotating projection 40; an upper caulking groove 381; a side insert groove 361; a lower caulking groove 371; a groove 41; the first rotating rib 351; the second rotation rib 352; a lower rotation rib 42; a connecting groove 43; a lower rotating support 44; a guide groove 45; a guide bar 46; an annular guide groove 47; the rising channel 47a; the reset channel 47b; gear adjustment teeth 48; a positioning slot 49; a receiving groove 50; an adjusting member 51; a detent 52; an avoidance groove 53; an elastic member 54.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

In the description of the present invention, the term "at least one" means one or more unless explicitly defined otherwise. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The specific implementation manner of the utility model is as follows:

as shown in fig. 1-11, the present invention provides a lumbar support and lumbar adjustment device, which comprises a lumbar support 31 and a lumbar support bracket 32; the lumbar support bracket 32 is arranged on the chair back of the chair, the chair back comprises a back bracket 1, and the lumbar support bracket 32 is arranged at the front end of the back bracket 1. The upper and lower ends of the lumbar support 31 are respectively connected to the lumbar support bracket 32 in a rotating manner; the lumbar support 31 has elasticity and the middle position is arched forward, so that the lumbar support 31 can support the waist of the user. A longitudinal sliding support part 32a is arranged at the lower part of the lumbar support bracket 32, and a sliding seat 33 is arranged on the sliding support part 32a in a sliding way; the slide base 33 can slide up and down along the slide support portion 32a; a gear adjusting mechanism is arranged between the sliding seat 33 and the sliding support part 32a, so that the sliding seat 33 can rise along the sliding support part 32a and stay at gear positions with different heights; the lower end of the lumbar support 31 is rotatably connected to the sliding seat 33; then the lower end of the lumbar support 31 can be driven to move up and down by the action sliding seat 33 moving up and down, so that the lumbar support 31 correspondingly generates elastic deformation along the longitudinal direction to be ejected forwards or retracted backwards; so that the top waist degree of the lumbar support 31 can be adjusted according to the user's needs.

As shown in fig. 2-7, the lumbar support 31 includes a lumbar frame 311 having a frame-type structure and two side lumbar supports 312 connected to the front end of the lumbar frame 311 and arranged side by side; specifically, the method comprises the following steps: the waist support frame 311 is of a bilateral symmetry structure, and the waist support frame 311 comprises longitudinal bar-shaped side rods 36 respectively positioned on the left side and the right side, a lower cross rod 37 respectively arranged at the bottom of each bar-shaped side rod 36, and an upper cross rod 38 respectively arranged at the upper end of each bar-shaped side rod 36. The two upper cross bars 38 are spaced from each other left and right, the two lower cross bars 37 are connected with a supporting cross bar 39 which is used for being connected and matched with the sliding seat 33, and the supporting cross bar 39 comprises two rotating protrusions 40 which are spaced from each other left and right and protrude backwards. The waist support frame 311 is made of nylon material and has certain toughness. Further comprising: the side waist support body 312 is made of TPU soft rubber, and the rear end of each side waist support body 312 is provided with an upper caulking groove 381, a side caulking groove 361 and a lower caulking groove 371 which can be respectively matched with the upper cross bar 38, the strip-shaped side bar 36 and the lower cross bar 37; then the side waist support 312 can be in front-and-back butt joint with the waist rest framework 311, so that the upper cross bar 38 is embedded in the upper caulking groove 381, the strip-shaped side bars 36 are embedded in the side caulking grooves 361, and the lower cross bar 37 is embedded in the lower caulking groove 371; thereby make the laminating that waist leaned on skeleton 311 can be stable and support two side waist supporter 312, and both butt joints are in the same place after connecting, and the wholeness is good, and the structure is pleasing to the eye. The purpose of the above structural design is: the waist support frame 311 is of a frame structure made of nylon materials, has good toughness, can provide support and can effectively generate elastic deformation in the vertical direction; the side waist support body 312 is made of TPU soft rubber, so that the deformation is easy and the side waist support body has good ductility; the waist support piece 31 formed by combining the two can keep the whole shape of the waist support, and the deformation effect of the waist support piece 31 in the vertical direction is good, so that the process of adjusting the waist supporting degree is easy and labor-saving. Otherwise if the lumbar support 31 is entirely made of nylon or elastic plastic, the one-piece structure is deformed laboriously, making the adjustment operation laborious. Furthermore, as shown in fig. 6, a plurality of longitudinally spaced grooves 41 are further provided on the front end surface of the bar-shaped side bars 36, so that the bar-shaped side bars 36 are staggered in thickness and thickness, and are more easily elastically bent and deformed, and the deformation of the bar-shaped side bars 36 can directly deform the side waist support 312 to adjust the top waist degree; thereby the adjusting operation is easier and more labor-saving.

Further, a first upper turning rib 351 protruding rearward is provided at an outer side end of each upper rail 37, and a second upper turning rib 352 protruding rearward is provided at an upper end of each side waist support 312; when the side lumbar support 312 and the lumbar frame 311 are in front-back butt joint, the first upper rotating rib 351 and the second upper rotating rib 352 can be overlapped left and right to form the upper rotating support 35. The upper end of the waist support bracket 32 is provided with support arms 34 which respectively extend towards two sides, and the end parts of the support arms 34 are provided with rotary mounting seats 34a; the rotation mount 34a is configured to be rotatably connected to the upper rotation mount 35; and rotate and adopt horizontal round pin axle to rotate to be connected between mount pad 34a and the last support 35 that rotates for rotate and connect the back, the round pin axle can also rotate fin 351 and second on to rotate the fin 352 to carry on spacingly, make side waist supporter 312 upper end and waist lean on skeleton 311 upper end to link together, avoid the waist to lean on skeleton 311 and side waist supporter 312 to break away from. During the elastic deformation of the lumbar support 31, the upper rotating support 35 can rotate relative to the rotating mounting seat 34a in a self-adaptive manner, so as to avoid the fracture of the joint due to stress; and the arms 34 at both sides are connected to both sides of the upper end of the lumbar support member 31, respectively, so that the lumbar support member 31 can be stably supported. Furthermore, as shown in fig. 5 and 6, a lower rotating convex rib 42 protruding backward is further provided at a position corresponding to the rotating protrusion 40 at the lower end of the side waist support body 312, a connecting groove 43 for the lower rotating convex rib 42 to penetrate is provided at the front end of the rotating protrusion 40, after the lumbar support frame 311 is connected with the side waist support body 312, the lower rotating convex rib 42 is just located in the connecting groove 42, and the two together form a lower rotating support 44; the lower rotation support 44 is configured to be rotatably connected to the sliding base 33, and the lower rotation rib 42 and the rotation protrusion 40 are rotatably connected to the sliding base 33 together by a pin shaft, so that the lower end of the side waist support 312 and the lower end of the waist support frame 311 can be connected together. By adopting the rotating structure, the connection between the lumbar support 31 and the lumbar support bracket 32 is realized, and the lumbar framework 311 and the side lumbar support body 312 can be stably connected together; the structure design is ingenious.

As shown in fig. 7 to 11, the sliding base 33 is slidably connected to the front end of the sliding support portion 32a, longitudinal guide grooves 45 are respectively formed on the left and right sides of the sliding support portion 32a, and a guide bar 46 slidably fitted in the guide grooves 45 is correspondingly formed on the rear end of the sliding base 33, so that the sliding base 33 can stably slide up and down along the sliding support portion 32a, and the guide bar 46 is engaged with the guide grooves 45 to restrict the sliding base 33 from being separated from the sliding support portion 32a back and forth. Specifically, the method comprises the following steps: the gear adjusting mechanism is arranged between the sliding seat 33 and the sliding support part 32a, and comprises an annular guide groove 47 concavely arranged on the front end surface of the sliding support part 32a and gear adjusting teeth 48 arranged in the annular guide groove 47; one side of the gear adjusting teeth 48 is provided with positioning slots 49 which are longitudinally spaced, and the positioning slots 49 are obliquely arranged upwards; the annular guide groove 47 comprises a rising groove 47a positioned on one side of the gear adjusting tooth 48 with the positioning clamping groove 49 and a reset groove 47b positioned on the other side of the gear adjusting tooth 48; and the upper end of the rising channel 47a is higher than the upper end of the reset channel 47 b. A containing groove 50 is arranged in the sliding seat 33, a longitudinal adjusting piece 51 is arranged in the containing groove 50, and the lower end of the adjusting piece 51 is rotatably connected with the sliding seat 33, so that the adjusting piece 51 can deflect left and right; the upper end of the adjusting piece 51 is provided with a bayonet 52 which extends backwards in the annular guide groove 47 and can be clamped with the positioning bayonet groove 48; an arc-shaped avoiding groove 53 for avoiding the movement of the detent 52 is arranged on the sliding seat 33. And the adjusting piece 51 always has a tendency of keeping straight, specifically: elastic pieces 54 transversely arranged are respectively arranged at two sides of the adjusting piece 51, and the elastic pieces 54 are positioned in the accommodating groove 50; each of the elastic members 54 has one end coupled to a side end of the adjusting member 51 and the other end coupled to a side wall of the accommodating groove 50. Such that, in turn, when the adjustment member 51 is deflected, the resilient member 54 will deform and provide a spring force to return the adjustment member 51 to the straight state again.

As shown in fig. 9-11, from bottom to top, both the lower end and the upper end of the shift position regulating tooth 48 are inclined sides that are inclined upward in the direction toward the upward groove 47a; then, during the raising of the user-actuated slide 33 along the sliding support 32a, said adjustment element 51 will deflect so that the catch 52 enters the raising channel 47a and rises along the raising channel 47a; when the bayonet 52 moves to the position of one of the positioning bayonet grooves 49, the adjusting piece 51 can automatically align to ensure that the bayonet 52 is clamped into the positioning bayonet groove 49 by the ascending channel 47a; at the moment, the sliding seat 33 is loosened, and the clamping pin 52 is clamped with the positioning clamping slot 49 up and down to enable the sliding seat 33 to stay at the height adjusting position; if the slide 33 is to be adjusted further, the slide 33 is simply acted upon to continue its upward movement, and the adjusting element 51 is deflected again so that the detent 52 is lifted out of the detent groove 49 and again into the lifting channel 47a; therefore, in the process of lifting the sliding seat 33, the clamping pins 52 can be sequentially clamped in the positioning clamping grooves 49 with different heights, so that the sliding seat 33 has a multi-gear adjusting position, the adjusting process is very convenient, and only acting force needs to be directly applied to the sliding seat 33 to enable the sliding seat 33 to move. When the sliding seat 33 needs to be lowered and reset after being lifted, the sliding seat 33 only needs to be lifted to the maximum height, and then the adjusting piece 51 automatically deflects to return and align so that the bayonet 52 enters the reset channel 47b from the upper end of the lifting channel 47a; the carriage 33 can then be moved directly downward to the home position and the detent 52 will be lowered along the reset channel 47b for reset. Then, the bayonet 52 moves for one circle along the annular guide groove 47, so that the ascending adjustment and descending reset of the sliding seat 33 can be realized; the lifting adjustment of the sliding seat 33 is stable, and the operation is very simple.

As shown in fig. 2-4 and 8, the sliding seat 33 is engaged with the supporting cross bar 39 back and forth, so that the sliding seat 33 can be clamped between two lower rotating supports 44, and each lower rotating support 44 is rotatably connected with the side end of the sliding seat 33; so that the lower end of the lumbar support 1 can be stably coupled to the sliding base 33. Then when the acting sliding seat 33 is lifted and adjusted, the lower end of the lumbar support 1 can be driven to move up and down, so that the lumbar support 1 can be elastically deformed correspondingly; when the sliding seat 33 is adjusted to move upwards, the lumbar support 1 continuously arches forwards, so that the lumbar supporting effect is obvious; and the sliding seat 33 has a plurality of adjusting positions, so that the lumbar support 1 correspondingly has a multi-gear waist-up state. When the waist supporting function is not needed, the waist supporting member 1 can be retracted to the initial position by only descending and resetting the action sliding seat 33. And during the operation, the user direct action slide 33 or waist lean on support piece 1's lower extreme go up and down can, can adjust on the chair to the top waist degree that support piece 1 was leaned on to the regulation waist that can be very convenient and fast.

Claims (10)

1. The utility model provides a waist leans on top waist adjusting device which characterized in that includes:

a lumbar support configured to be mounted on the back support;

the waist support is arranged on the waist support bracket; the waist support piece has elasticity, the middle position of the waist support piece is arched forwards, and the upper end and the lower end of the waist support piece are respectively matched with the waist support frame in a rotating way;

the sliding seat is arranged on the waist rest bracket in a sliding manner; the lower part of the waist support is provided with a longitudinal sliding support part, and the sliding seat is connected to the front end of the sliding support part in a sliding way; a gear adjusting mechanism is arranged between the sliding seat and the sliding support part; the gear adjusting mechanism comprises an annular guide groove concavely arranged on the end surface of the sliding supporting part and gear adjusting teeth arranged in the annular guide groove; one side of the gear adjusting gear is provided with positioning clamping grooves which are longitudinally spaced; a longitudinal adjusting piece capable of deflecting left and right is arranged in the sliding seat, and a clamping pin which is protrudingly matched in the annular guide groove and can be clamped with the positioning clamping groove is arranged on the adjusting piece; the adjusting piece always has the tendency of keeping straight; in the process of the sliding seat rising, the clamping pins move upwards along the annular guide groove and can be sequentially clamped in the positioning clamping grooves under the aligning action of the adjusting piece; in the descending and resetting process of the sliding seat, the bayonet pins move downwards along the annular guide groove to reset;

the lower end of the waist support piece is rotatably connected to the sliding seat; the lower end of the waist support piece can be driven to move up and down by the lifting adjustment of the action sliding seat, and the waist support piece correspondingly generates elastic deformation along the longitudinal direction so as to be ejected forwards or retracted backwards.

2. The lumbar support lumbar adjustment device of claim 1, wherein: the annular guide groove comprises a rising channel positioned on one side of the gear adjusting tooth, which is provided with a positioning clamping groove, and a reset channel positioned on the other side of the gear adjusting tooth; in the process of the sliding seat rising, the adjusting piece deflects towards one side of the rising channel, and the clamping pins move upwards along the rising channel and can be sequentially clamped into the positioning clamping grooves at different positions under the action of the returning of the adjusting piece; in the process of descending and resetting the sliding seat, the adjusting piece is deflected to one side facing the resetting channel from the ascending channel, and the clamping pin descends and resets along the resetting channel.

3. The lumbar support and lumbar support adjustment device according to claim 1 or 2, characterized in that: a containing groove for containing the adjusting piece is arranged in the sliding seat; the lower end of the adjusting piece is rotatably connected in the accommodating groove, and the bayonet lock is arranged at the upper end of the adjusting piece and is backwards clamped in the annular guide groove; elastic pieces which are transversely arranged are respectively arranged on the two sides of the adjusting piece; one end of each elastic piece is connected with the side end of the adjusting piece, and the other end of each elastic piece is connected with the side wall of the accommodating groove; the elastic member can be elastically deformed in response to the deflection motion of the adjusting member to provide an elastic force for the adjusting member to return to the straight state again.

4. The lumbar support lumbar adjustment device of claim 2, wherein: from bottom to top, the lower extreme and the upper end of gear adjusting tooth are the hypotenuse of upwards slope towards the direction of rising channel.

5. The lumbar support lumbar adjustment device of claim 1, wherein: the left side and the right side of the upper end of the waist support piece are respectively provided with an upper rotating support which is used for being rotationally connected with the waist support; the lower end of the waist support piece is provided with a lower rotating support which is arranged at left and right intervals and is used for being connected with the sliding seat in a rotating way.

6. The lumbar support lumbar adjustment device of claim 5, wherein: the upper end of the waist rest support is provided with support arms which respectively extend out towards two sides, and the end parts of the support arms are provided with rotary mounting seats; the rotation mount is configured to be rotatably coupled to the upper rotation mount.

7. The lumbar support lumbar adjustment device of claim 5, wherein: the lower rotating support is arranged in the middle of the lower end of the waist support; the sliding seat is clamped between the two lower rotating supports, and two sides of the sliding seat are respectively connected with the lower rotating supports in a rotating mode.

8. The lumbar support lumbar adjustment device of claim 1, wherein: the waist support comprises a waist support frame with a frame structure and two side waist support bodies which are connected to the front end of the waist support frame and are arranged side by side left and right; the waist rest framework is of a bilateral symmetry structure and comprises longitudinal strip-shaped side rods respectively positioned on the left side and the right side, a lower cross rod respectively arranged at the bottom of each strip-shaped side rod and an upper cross rod respectively arranged at the upper end of each strip-shaped side rod; the rear end of each side waist supporting body is provided with an upper caulking groove, a side caulking groove and a lower caulking groove which can be matched with the upper cross rod, the strip-shaped side rods and the lower cross rod respectively.

9. The lumbar support lumbar adjustment device of claim 8, wherein: the waist support framework is made of nylon; the side waist support body is made of a tpu soft rubber material.

10. The lumbar support lumbar adjustment device of claim 1, wherein: the left side and the right side of the sliding support part are respectively concavely provided with a guide groove, and two sides of the rear end of the sliding seat are correspondingly provided with guide strips extending towards the center of the sliding seat; the guide bar is embedded in the guide groove in a sliding manner.

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