CN217592388U - Waist support piece and seat - Google Patents

Abstract

The utility model discloses a waist support piece and a seat, wherein the waist support piece comprises a waist skeleton and two side waist support bodies which are arranged at the front end of the waist skeleton and are arranged side by side left and right; the waist rest framework is detachably connected with the side waist support body; the waist rest framework is of a frame type structure which is symmetrical left and right; the waist rest framework has elasticity and comprises longitudinal bar-shaped side rods respectively positioned at the left side and the right side, a lower cross rod respectively arranged at the bottom of each bar-shaped side rod and an upper cross rod respectively arranged at the upper end of each bar-shaped side rod; the side waist supporting bodies are made of flexible materials, and 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; the waist support framework is embedded in the rear end of the side waist support body and provides elastic support for the side waist support body; the waist support piece formed by combining the waist support framework and the side waist support body can keep the overall shape of the waist support, so that the waist support piece is easy to deform; the support of the waist support piece can be ensured.

Description

Waist leans on support piece and thing to sit on

Technical Field

The utility model relates to a thing to sit on field, in particular to support piece and thing to sit on are leaned on to waist.

Background

As is well known, the spine of a human body is S-shaped, and therefore, a waist rest capable of supporting the waist is additionally arranged at the backrest of most 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 practical use, because the body types of people are in diversified distribution of tall, short, fat and thin, the waist support with the fixed position is difficult to adapt to people with different body types, the front and back depth of the waist support cannot be adjusted to meet individual differences, and the application range and the health care effect of the waist support are limited.

The existing chairs with adjustable back and forth depths can provide proper support for the waist of a user by adjusting the back and forth depths of the back supports. Has the following steps: the waist support is made of elastic materials, and the waist supporting degree of the waist support is adjusted by controlling the bending deformation of the waist support in the vertical direction; the larger the lumbar support deformation is, the more obvious the front arch of the lumbar support is, so that the lumbar support effect is more obvious. But there are problems in that: the existing waist rest is basically in a whole-block structure, and even if the waist rest is made of elastic plastic materials, the elastic deformation is still difficult, so that the adjustment operation is difficult; if the material is too soft, although the deformation effect of the lumbar support can be met, the lumbar support loses the support undoubtedly.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provide a waist support piece; the waist support piece is composed of a waist support framework and two side waist support bodies; the waist support framework is made of nylon materials, has good toughness and can provide enough elastic support; the waist rest framework is arranged into a frame type structure, so that elastic deformation along the vertical direction is facilitated; the side waist support body is made of TPU soft rubber, is easy to deform and has good ductility; then the waist support piece formed by combining the waist support framework and the side waist support body can keep the whole shape of the waist support and has beautiful structure; and the deformation effect of the waist support piece in the vertical direction is good; the support of the waist support piece can be ensured.

Then provides a seat based on the characteristics of the lumbar support; connect the upper and lower both ends that support piece was leaned on to the waist respectively on the support, the waist leans on support piece's lower extreme can follow the waist to lean on the support to reciprocate so that the waist leans on support piece elastic bending to warp, then can adjust the waist degree of pushing up through controlling its deformation degree.

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

a lumbar support comprises a lumbar skeleton and two side lumbar support bodies which are arranged at the front end of the lumbar skeleton and are arranged side by side left and right; the waist rest framework is detachably connected with the side waist support body; the waist rest framework is of a frame type structure which is symmetrical left and right; the waist support framework has elasticity 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 side waist supporting bodies are made of flexible materials, and the rear end of each side waist supporting body is correspondingly provided with an upper caulking groove, a side caulking groove and a lower caulking groove which can be respectively matched with the upper cross rod, the strip-shaped side rods and the lower cross rod; the waist back framework is embedded in the rear end of the side waist support body and provides elastic support for the side waist support body.

Preferably, the waist support framework is made of nylon. The waist support framework is made of nylon materials, so that the waist support framework has good toughness and can provide enough support; and the waist rest framework is arranged to be of a frame type structure, so that elastic deformation can be more conveniently generated along the vertical direction.

Preferably, the side waist support body is made of a tpu soft rubber material. The side waist support body is made of TPU soft rubber, is easy to deform and has good ductility; then the waist support piece formed by combining the waist support framework and the side waist support body can keep the whole shape of the waist support, so that the deformation effect of the waist support piece in the vertical direction is good; the support performance of the waist support piece can be ensured; avoid a monoblock structure to lead to deformation and labouring.

Preferably, the bar-shaped side bars are in the shape of an arc with a front arch at the middle position. The bar-shaped side rods can play a role in supporting waist; and when the waist rest framework elastically deforms, the strip-shaped side rods can naturally and completely deform to change the front arching degree, and the waist supporting adjusting effect is achieved.

Preferably, the front end face of the strip-shaped side rod is provided with a plurality of longitudinally spaced grooves. Thereby the thickness interval staggers on making the bar side lever, makes it take place the elastic bending deformation more easily.

Preferably, the two sides of the upper end of the waist support are respectively provided with an upper rotating support protruding backwards; the upper rotating support comprises a first upper rotating convex rib which is arranged at the outer side end of the upper cross rod and extends backwards, and a second upper rotating convex rib which is arranged at the corresponding position of the upper end of the side waist support body and extends backwards; the first upper rotating convex rib and the second upper rotating convex rib are overlapped left and right. The first upper rotating convex ribs and the second upper rotating convex ribs are overlapped left and right to form an upper rotating support together, so that the structural integrity is good; and go up to rotate the support and adopt horizontal round pin axle to rotate usually and connect for can also make first last rotation fin and second go up to rotate the fin behind the connecting pin axle and link together about.

Preferably, two lower rotating supports which are spaced left and right are arranged at the middle position of the lower end of the waist support piece; a supporting cross bar is connected between the two lower cross bars, two rotating bulges which are spaced left and right and protrude backwards are arranged on the supporting cross bar, and lower rotating convex ribs which extend backwards are arranged at corresponding positions of the lower ends of the side waist supporting bodies; the rotating bulge is internally provided with a connecting groove with an opening positioned at the front end, and the lower rotating convex rib is embedded in the connecting groove; the lower rotating convex rib and the rotating bulge form the lower rotating support. The lower rotating convex rib is embedded into the rotating protrusion to form a lower rotating support, and the lower rotating support is also connected in a rotating mode through a transverse pin shaft, so that the lower rotating convex rib and the rotating protrusion can be connected together after the connecting pin shaft.

Preferably, the support rails are connected to the rear end faces of the two bottom rails, and the support rails protrude rearward from the bottom rails. The support cross rod is used for enhancing the structural stability of the lower end of the waist support piece, so that the support cross rod cannot interfere with the side waist support body, and the lower cross rod can be embedded into the lower cross groove.

A piece of seating furniture comprises a back support and a lumbar support arranged on the back support, wherein the lumbar support is provided with a lumbar support piece; the upper end and the lower end of the lumbar support piece are respectively connected to the lumbar support bracket, and the lower end of the lumbar support piece can move up and down along the lumbar support bracket to be adjusted so that the lumbar support piece can elastically deform along the longitudinal direction. The structure design based on the lumbar support enables the lumbar support to be capable of bending and deforming in the longitudinal direction and has good support performance; then can adjust the waist supporting degree by controlling the deformation degree thereof.

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

firstly, the waist support piece of the utility model is formed by the front-back butt joint of a waist support framework and two side waist support bodies; the waist rest framework is embedded in the rear end of the side waist support body, so that the structure integrity is good and the appearance is attractive; the waist support framework is made of nylon materials, so that the waist support framework has good toughness and can provide enough elastic support; the waist rest framework is arranged into a frame type structure, so that elastic deformation along the vertical direction is facilitated; the side waist support body is made of TPU soft rubber, is easy to deform and has good ductility; so that the waist support formed by combining the waist support framework and the side waist support body can keep the overall shape of the waist support, and the deformation effect of the waist support in the vertical direction is good; compare with the waist that adopts a monoblock elastic construction to make among the prior art, undoubtedly the utility model discloses a waist is by support piece deformation more laborsaving light.

Moreover, the strip-shaped side rods, the upper cross rods and the lower cross rods of the waist support framework can provide enough support strength for a user, so that the support performance of the waist support is not problematic; and the front end surface of the bar-shaped side lever is provided with a plurality of longitudinally spaced grooves; thereby the thickness interval staggers on making the bar side lever, makes it take place the elastic bending deformation more easily.

Secondly, a first upper rotating convex rib on the waist rest framework and a second upper rotating convex rib on the side waist support piece are overlapped left and right to form an upper rotating support; the rotating bulge on the waist rest framework and the lower rotating convex rib on the side waist support piece form a lower rotating support; after the waist support piece is connected with the waist support bracket, the waist support framework and the side waist support piece can be further connected stably; the structure design is ingenious.

In addition, the upper end and the lower end of the lumbar support are respectively connected to the lumbar support bracket, the lower end of the lumbar support is controlled to move up and down along the lumbar support bracket for adjustment, so that the lumbar support generates elastic deformation along the longitudinal direction, and then the waist supporting degree can be adjusted by controlling the deformation degree; based on the characteristics that the waist support piece has good deformation effect in the vertical direction and good support performance, the operation is easy and labor-saving in the process of adjusting the waist supporting degree.

Drawings

Fig. 1 is a side view of a lumbar support member disposed on a seat in an embodiment of the present invention;

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

fig. 3 is a schematic back side perspective view 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 in 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 the sliding fit between the sliding base and the sliding support portion according to the 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 various reference numbers are: a back support 1; a lumbar support 31; a lumbar support bracket 32; the slide support portion 32a; a slider 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; a bar-shaped side bar 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 strip 46; an annular guide groove 47; the rising channel 47a; a 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 utility model discloses a specific embodiment as follows:

as shown in fig. 1-11, the present invention provides a lumbar support and a seat, wherein the seat comprises a back support 1 and a lumbar support 32 installed at the front end of the back support 1; the upper end and the lower end of the lumbar support 31 are respectively and rotatably connected to the lumbar support bracket 32; 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. The lower part of the lumbar support bracket 32 is provided with a longitudinal sliding support part 32a, 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 position 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 position 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 skeleton 311 of a frame-type structure and two side lumbar supports 312 connected to the front end of the lumbar skeleton 311 and arranged side by side; specifically, the method comprises the following steps: the waist rest framework 311 is of a bilateral symmetry structure, and the waist rest framework 311 comprises longitudinal bar-shaped side bars 36 respectively positioned at the left and right sides, a lower cross bar 37 respectively arranged at the bottom of each bar-shaped side bar 36, and an upper cross bar 38 respectively arranged at the upper end of each bar-shaped side bar 36. The two upper cross rods 38 are spaced left and right, the two lower cross rods 37 are connected with supporting cross rods 39 which are used for being connected and matched with the sliding base 33, and the supporting cross rods 39 are provided with two rotating protrusions 40 which are spaced 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; the side waist support 312 can be connected with the waist back frame 311 in a front-back manner, so that the upper cross bar 38 is embedded in the upper caulking groove 381, the bar-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. The supporting cross bar 39 is connected to the rear end surfaces of the two lower cross bars 37, so that the structural strength is enhanced, and the two side waist supporting bodies 312 are kept to synchronously move up and down; the support rail 39 is protruded rearward from the lower rail 37 so that the support rail 39 does not interfere with the side lumbar support 312; so that the lumbar support frame 311 can be stably attached to and support the two side lumbar support bodies 312. Adopt above-mentioned structural design's aim at: the waist rest framework 311 is of a frame type structure made of nylon materials, has good toughness and can provide support, and the frame type structure is more favorable for 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 made entirely of nylon or elastic plastic, the one-piece structure is deformed laboriously, making the adjustment operation laborious. Further, 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 bar 36, so that the bar-shaped side bar 36 is staggered in thickness and thickness, and is more easily elastically deformed, and the deformation of the bar-shaped side bar 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 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 waist support 312 is coupled with the waist support frame 311 in a front-back manner, the first upper rotating rib 351 and the second upper rotating rib 352 can be overlapped in a left-right manner to form the upper rotating seat 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 the horizontal round pin axle to rotate to be connected between mount pad 34a and the last support 35 that rotates for rotate the connection back, the round pin axle can also rotate on the first fin 351 and the second and rotate fin 352 spacing, make the waist of inclining to support 312 upper end and the waist lean on skeleton 311 upper end link together, avoid the waist to lean on skeleton 311 and side waist support 312 to break away from. In the elastic deformation process 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 that the connection part is prevented from being broken under stress; and the arms 34 at both sides are respectively connected to both sides of the upper end of the lumbar support 31, so that the lumbar support 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 slide base 33, and the lower rotation rib 42 is rotatably connected to the slide base 33 together with the rotation protrusion 40 by using a pin shaft, so that the lower end of the lumbar support 312 and the lower end of the lumbar support frame 311 can be connected together as well. 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 channel 47a positioned on one side of the gear adjusting tooth 48 with the positioning slot 49 and a reset channel 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 on 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, when the user acts on the slide seat 33 to ascend along the slide support portion 32a, the adjusting member 51 will deflect to make the detent 52 enter the ascending channel 47a and ascend along the ascending 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 downwards to the initial position and the detent 52 will be lowered along the reset channel 47b for resetting. 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 slide 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 39 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 slider 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 moves upwards for adjustment, 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 also has a multi-gear waist-up state correspondingly. When the waist supporting function is not needed, the waist support part 1 can be retracted to the initial position only by descending and resetting the action slide seat 33. And during the operation, the user direct action slide 33 or waist lean on the lower extreme of support piece 1 go up and down can, can adjust on the seat face to the top waist degree that support piece 1 was leaned on to the regulation waist that can be very convenient and fast.

Claims (9)

1. A lumbar support, characterized by: the waist support piece comprises a waist support framework and two side waist support bodies which are arranged at the front end of the waist support framework and are arranged side by side left and right; the waist rest framework is detachably connected with the side waist support body; the waist rest framework is of a frame type structure which is symmetrical left and right; the waist rest framework has elasticity and comprises longitudinal bar-shaped side rods respectively positioned at the left side and the right side, a lower cross rod respectively arranged at the bottom of each bar-shaped side rod and an upper cross rod respectively arranged at the upper end of each bar-shaped side rod; the side waist supporting bodies are made of flexible materials, and the rear end of each side waist supporting body is correspondingly provided with an upper caulking groove, a side caulking groove and a lower caulking groove which can be respectively matched with the upper cross rod, the strip-shaped side rods and the lower cross rod; the waist back framework is embedded in the rear end of the side waist support body and provides elastic support for the side waist support body.

2. The lumbar support of claim 1, wherein: the waist back framework is made of nylon.

3. The lumbar support of claim 1, wherein: the side waist support body is made of a tpu soft rubber material.

4. The lumbar support of claim 1, wherein: the strip-shaped side rods are in an arc shape with a front arch at the middle position.

5. The lumbar support of claim 1, wherein: the front end face of the strip-shaped side rods is provided with a plurality of grooves which are longitudinally spaced.

6. The lumbar support of claim 1, wherein: two sides of the upper end of the waist support are respectively provided with an upper rotating support protruding backwards; the upper rotating support comprises a first upper rotating convex rib which is arranged at the outer side end of the upper cross rod and extends backwards, and a second upper rotating convex rib which is arranged at the corresponding position of the upper end of the side waist support body and extends backwards; the first upper rotating convex rib and the second upper rotating convex rib are overlapped left and right.

7. The lumbar support of claim 1, wherein: two lower rotating supports which are spaced left and right are arranged at the middle position of the lower end of the waist support piece; a supporting cross bar is connected between the two lower cross bars, two rotating bulges which are spaced left and right and protrude backwards are arranged on the supporting cross bar, and lower rotating convex ribs which extend backwards are arranged at corresponding positions of the lower ends of the side waist supporting bodies; the rotating bulge is internally provided with a connecting groove with an opening positioned at the front end, and the lower rotating convex rib is embedded in the connecting groove; the lower rotating convex rib and the rotating bulge form the lower rotating support.

8. The lumbar support of claim 1, wherein: the supporting cross rods are connected to the rear end faces of the two lower cross rods and protrude backwards from the lower cross rods.

9. A piece of seating furniture, characterized in that: comprises a back bracket and a lumbar support bracket arranged on the back bracket, wherein the lumbar support bracket is provided with a lumbar support part as claimed in any one of claims 1 to 8; the upper end and the lower end of the lumbar support piece are respectively connected to the lumbar support bracket, and the lower end of the lumbar support piece can move up and down along the lumbar support bracket to be adjusted so that the lumbar support piece can elastically deform along the longitudinal direction.

Images