CN218185962U - Waist rest device of chair - Google Patents

Abstract

The utility model discloses a waist rest device of a chair, which comprises a back support and a waist rest main body, wherein the back support comprises back side rods at two sides, and a longitudinal chute which is hollowed at the left and the right is arranged at the middle position of each back side rod; the two ends of the waist rest main body are provided with adjusting parts positioned in the sliding grooves, and the adjusting parts are attached to the back side rod backwards; a sliding mechanism is arranged between the adjusting part and the back side rod, and comprises a guide convex strip which is arranged on the adjusting part and protrudes backwards and a sliding support part which is correspondingly arranged on the back side rod; the sliding support part is provided with a longitudinal guide rail which can be in sliding fit with the guide convex strip; the shapes of the side sections of the guide rails are all in a regular circular arc shape, and the rear ends of the guide convex strips are configured to have a radian matched with the guide rails; the rear end of the guide raised line is attached to the inner wall of the guide rail in a front-back manner, and the guide raised line can slide up and down along the guide rail; the waist rest main body can be adjusted in an arc-shaped up-and-down movement mode instead of being adjusted vertically and vertically, so that the requirement of supporting the waist comfortably is met.

Description

Waist rest device of chair

Technical Field

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

Background

With the increase of work and reading time of modern people, the modern people must sit on the seat for a long time and sit still for a long time, so that the human spine is seriously injured by intervertebral disc protrusion, displacement and the like caused by long-time weight compression of the human spine, and the modern people are very easy to generate serious sequelae such as sciatica or ankylosing spondylitis and the like. Therefore, many manufacturers can add a waist support to the backrest when the chair is produced, so that the waist of a user can be supported when the user sits on the chair, and the fatigue caused by long-time sitting can be avoided. However, in the prior art, the waist rest is generally fixed to the seat back by a fixing structure, and the position of the waist rest cannot be adjusted according to the body shape or actual requirements of a user, so that the waist rest is poor in flexibility and cannot meet the actual requirements of the user.

Chinese utility model patent CN201420628431.8 discloses "can be adjusted about, waist lean on" including back frame, install the waist that takes the boss on the back frame and lean on the lifting support clamp plate, the waist leans on the lifting support clamp plate and the waist that takes the recess to lean on lifting support meshing each other, the top that the waist leaned on lifting support is equipped with the mounting hole, is equipped with the waist and leans on the planking in the mounting hole, the middle part that the waist leaned on the planking is equipped with threaded through-hole, install front and back adjusting screw in the threaded through-hole, front and back adjusting knob is installed to the outer end of front and back adjusting screw, front and back adjusting knob's surface is installed knob dress trim cover, still install the waist on the inner panel on the waist leans on the planking; the utility model has beautiful appearance, convenient installation and comfortable use, and can meet the requirements of consumers with different body types. The waist rest needs to be provided with a waist rest lifting support pressing plate on the back outer frame, and the waist rest lifting support pressing plate is also meshed with a waist rest lifting support with a groove; according to the attached drawings of the patent, it can be seen that the front-back and up-down adjustment of the waist support can be realized only by additionally arranging a plurality of structural components on the back outer frame; the structure is too complicated, and the back outer frame is not simplified enough, so that the appearance is influenced; and the waist supports can only be adjusted vertically and vertically along the vertical direction, so that the vertical movement of the waist support in the shape of a circular arc is difficult to realize.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provide a waist rest device of a chair, wherein a longitudinal chute which is hollowed out left and right is arranged at the middle position of a back side rod, and an adjusting part is arranged in the chute and is attached to the back side rod, so that the structure is simple and beautiful; the guide convex strips are matched with the guide rails in the shape of a regular arc; the waist rest main body is not adjusted vertically, but can be adjusted vertically in an arc shape to meet the requirement of supporting the waist comfortably, and the use feeling is better.

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

a lumbar support device of a chair comprises a back support and a lumbar support main body, wherein the back support comprises back side rods respectively positioned at two sides, and a longitudinal sliding groove which is hollowed out left and right is arranged in the middle of each back side rod; the two ends of the waist rest main body are provided with adjusting parts positioned in the sliding grooves, and the adjusting parts are attached to the back side rod backwards; a sliding mechanism is arranged between the adjusting part and the back side rod, and comprises a guide convex strip which is arranged on the adjusting part and protrudes backwards and a sliding support part which is correspondingly arranged on the back side rod; the sliding support part is provided with a longitudinal guide rail which can be in sliding fit with the guide convex strip; the shapes of the side sections of the guide rails are all in a regular circular arc shape, and the rear ends of the guide convex strips are configured to have a radian matched with the guide rails; the rear end of the guide convex strip is attached to the inner wall of the guide rail in a front-back mode, and the guide convex strip can slide up and down along the guide rail.

Preferably, the back side rod comprises a front support rod positioned in front of the sliding groove and a rear support rod positioned behind the sliding groove; the back supporting rod is of an arc structure protruding forwards at the waist leaning position, and the adjusting part is arranged on the back supporting rod in a backward leaning mode. The adjusting part is positioned between the front supporting rod and the rear supporting rod and is attached to the rear supporting rod, and the structure is simple and attractive.

Preferably, the rear strut is convex forward at the lumbar support position to form an arc convex part, and the sliding support part is arranged on the arc convex part; the waist rest main body can move up and down to be adjusted along the arc-shaped track of the arc-shaped convex part. The waist leans on the main part to adjust the in-process not straight up-down regulation from top to bottom, but can carry out curved reciprocating motion with the arc orbit of arc convex part and adjust and reach comfortable top waist's requirement in order to laminate the back screen cloth, and it is better to use the impression.

Preferably, a lifting adjusting mechanism is further arranged between the sliding support part and the adjusting part, and comprises an elastic collar arranged on the sliding support part and a longitudinal gear sliding groove correspondingly arranged on the adjusting part; the gear sliding chutes penetrate through the waist rest in front and at back; two sides of the gear sliding chute are respectively provided with a positioning clamping groove which is longitudinally spaced; when direction sand grip sliding fit is in the guide rail, the elasticity rand is located the gear spout and the both ends of elasticity rand can with positioning channel joint respectively. The elastic clamping ring elastically deforms and is clamped with the positioning clamping grooves in different positions, so that the damping lifting adjusting effect can be achieved, the operation is convenient, and a locking structure is not required to be additionally arranged.

Preferably, a limit cover plate is further arranged at the gear sliding chute at the front end of the waist rest main body, and the width of the limit cover plate is wider than that of the gear sliding chute; the limiting cover plate is connected to the rear side frame to limit the waist rest main body to be separated from the rear side frame; the adjusting part is clamped between the limiting cover plate and the rear side frame. After the connection, the elastic clamping ring is hidden between the limiting cover plate and the rear support rod, so that connection traces can be hidden, and the structure is very simple and attractive.

Preferably, the sliding fit part is provided with connecting columns which are used for connecting the limiting cover plate and are spaced up and down; the limiting cover plate is provided with a connecting hole, and the limiting cover plate is fixedly connected with the connecting column through screws. After connection, the elastic clamping ring is hidden between the limiting cover plate and the rear side frame, connection traces can be hidden, and the appearance is attractive.

Preferably, the sliding fit part is further provided with a limiting column for connecting the elastic clamping ring, and the limiting column is located between the two connecting columns.

Preferably, the guide convex strip and the gear sliding groove are arranged adjacently left and right. So that the waist rest main body is more stable when sliding.

Preferably, the end of the adjuster protrudes outward from the rear strut. So that the waist support body can be controlled to lift up and down by the user's hand stretching at the side part of the back bracket.

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

the waist rest device of the chair seat of the utility model is provided with a longitudinal chute with a left hollow part and a right hollow part at the middle position of the back side rod, and then the adjusting part is arranged in the chute and is attached to the back support rod, so that the structure is simple and beautiful; the side surface of the rear support rod is arc-shaped, and the side cross sections of the guide rails are all in the shape of a regular arc; the rear end of the guide convex strip is configured to have a radian matched with the guide rail; the rear end of the guide raised line is attached to the inner wall of the guide rail in a front-back manner, and the guide raised line can slide up and down along the guide rail; thereby work as the direction sand grip slides the in-process from top to bottom along the guide rail, the waist leans on the main part can carry out the regulation of regular circular arc's activity from top to bottom for the waist leans on the regulation in-process from top to bottom not straight up straight down, but can laminate back screen cloth and reach the requirement of comfortable top waist, and the regulation effect is better.

Moreover, the multi-gear adjustment of the waist rest main body is realized by utilizing the elastic retainer ring, so that the waist rest main body can be adjusted; the user can directly act on the adjusting part to move up and down to drive the waist rest main body to move up and down; the adjusting mode is simple and quick.

Drawings

Fig. 1 is a side view of the back support and lumbar support body after assembly in an embodiment of the present invention;

fig. 2 is a rear view of the assembled back support and lumbar support main body in the embodiment of the present invention;

fig. 3 is a schematic perspective view of the back support and the lumbar support after being assembled according to the embodiment of the present invention;

fig. 4 is an exploded view of the connection of the back bracket and the lumbar support body in an embodiment of the present invention;

fig. 5 is a schematic perspective view of the sliding support portion according to the embodiment of the present invention;

fig. 6 is a side sectional view of the guide rib engaging with the guide rail according to the embodiment of the present invention;

fig. 7 is a side sectional view of the guide rib of the present invention slidably fitted on the guide rail in the embodiment;

fig. 8 is a schematic perspective view of the elastic collar fitted in the gear sliding groove according to the embodiment of the present invention;

fig. 9 is a schematic perspective view of the elastic collar connected to the sliding fit portion according to the embodiment of the present invention.

The figures are numbered: a back support 1; a lumbar support main body 2; a backside lever 2a; a chute 3; a front support rod 4; a rear support rod 5; the arc convex part 5a; an adjustment section 6; a guide rib 7; a slide support portion 8; a guide rail 9; a boss 9a; a barrier strip 9b; an elastic collar 10; a gear slide groove 11; a stopper post 12; a positioning card slot 13; a limit cover plate 14; a connecting column 15; and connecting to the aperture 16.

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. 1-9, the present invention provides a lumbar support device for a chair, which comprises a back support 1 and a lumbar support body 2 disposed on the back support 1; wherein, the back bracket 1 is of a frame type structure; the back frame 1 includes back-side bars 2a longitudinally positioned on the left and right sides, respectively. A left and right hollow longitudinal sliding groove 3 is arranged in the middle of each back side rod 2a, and the sliding groove 3 penetrates through the back side rods 2a from left to right; so that the back side rods 2a form a front support rod 4 positioned in the front of the sliding chute 3 and a rear support rod 5 positioned in the rear of the sliding chute 3; two ends of the waist rest main body 2 are respectively provided with an adjusting part 6 positioned in the sliding groove 3; and the adjusting part 6 abuts and is slidably coupled to the rear stay 5 rearward so that the middle portion of the lumbar main body 2 is suspended on the back bracket 1.

As shown in fig. 1-7, the rear support bar 5 is an arc structure protruding forwards at the position of the lumbar support body 2; the rear support rod 5 is protruded forwards at the position of the lumbar support main body 2 to form an arc convex part 5a; the adjusting part 6 abuts and is slidably attached to the front end of the arc convex part 5 a. A sliding mechanism is arranged between the adjusting part 6 and the arc convex part 5a, the sliding mechanism comprises a guide convex strip 7 which is arranged on the adjusting part 6 and protrudes backwards and a sliding support part 8 which is correspondingly arranged at the front end of the arc convex part 5a, and a longitudinal guide rail 9 which can be in sliding fit with the guide convex strip 7 is arranged on the sliding support part 8; as shown in fig. 5-7, the guide rib 7 is a sliding fit in the guide rail 9; specifically, the method comprises the following steps: a longitudinal boss 9a is arranged on the sliding support part 8, a barrier strip 9b protruding forwards is arranged on one side of the boss 9a, and the guide rail 9 is formed between the boss 9a and the barrier strip 9b; when the guide rail 9 is matched with the guide convex strip 7, the rear end of the guide convex strip 7 is abutted against the boss 9a, and the guide convex strip 7 is abutted against the barrier strip 9b left and right; so that the guide convex strip 7 can stably slide up and down along the guide rail 9. As shown in fig. 6 and 7, after the two are in sliding fit, the rear end of the guide convex strip 7 is clung to the inner wall of the guide rail 9; the shape of the side section of the guide rail 9 is a regular arc, and the rear end of the guide convex strip 7 is configured to have a radian matched with that of the guide rail 9, so that the guide convex strip 7 can be attached to the inner wall of the guide rail 9; therefore, when the guide convex strips 7 slide up and down along the guide rails 9, the waist rest main body 2 can be adjusted up and down along the arc part 5a in a regular circular arc shape; make the waist lean on main part 2a adjust the in-process not straight up-down regulation from top to bottom, but can carry out curved up-and-down movement with the arc orbit of arc convex part 5a and adjust in order to laminate the back screen cloth and reach the requirement of comfortable top waist, use the impression better.

Further, as shown in fig. 3-9, a lifting adjusting mechanism is further provided between the lumbar support body 2 and the rear support bar 5, and the lifting adjusting mechanism comprises an elastic collar 10 disposed on the sliding support portion 8 of the rear support bar 5, and a longitudinal gear slide groove 11 correspondingly disposed on the adjusting portion 6; specifically, the method comprises the following steps: a limiting column 12 protruding forwards is arranged at the position of the sliding support part 8 adjacent to the guide rail 9, the elastic clamping ring 10 is a rubber ring, and the elastic clamping ring 10 is connected to the limiting column 12; the gear sliding chutes 11 are longitudinally arranged at corresponding positions of the adjusting part 6, and the gear sliding chutes 11 penetrate through the lumbar support main body 2 from front to back; two sides of the gear sliding chute 11 are respectively provided with a positioning clamping groove 13 which is longitudinally spaced. The direction sand grip 7 sliding fit is back in guide rail 9, elasticity rand 10 be located gear spout 11 and the both ends of elasticity rand 10 can with positioning channel groove 13 joint respectively. Then, when the waist rest main body 2 is lifted along the rear support rod 5, the elastic clamping ring 10 elastically deforms and is clamped with the positioning clamping grooves 13 at different positions, so that the damping lifting adjustment effect can be achieved, the operation is convenient, and a locking structure is not required to be additionally arranged; and a plurality of positioning clamping grooves 13 are arranged, so that the waist rest main body 2 has a multi-gear adjusting position, and the gear feeling is good. And the guide convex strips 7 and the gear slide grooves 11 are arranged at left and right intervals, so that the adjusting part 6 can be stably and slidably connected to the rear support rod 5, and the waist rest main body 2 is stably connected with the back support.

Furthermore, a limit cover plate 14 is arranged at the gear sliding chute 11 at the front end of the waist rest main body 2, and the width of the limit cover plate 14 is wider than that of the gear sliding chute 11; the limiting cover plate 14 is connected to the rear support rod 5 to limit the lumbar support body 2 from being separated from the rear support rod 5, specifically: connecting columns 15 are respectively arranged at the upper end and the lower end of the sliding support part 8 positioned on the elastic clamping ring 10, and connecting holes 16 are correspondingly arranged on the limiting cover plate 14; the limiting cover plate 14 is connected to the rear support rod 5 through screws, and the screws penetrate through the connecting holes 16 from front to back and are connected into the connecting columns 15; then, after the limit cover plate 14 is assembled, the waist rest main body 2 is tightly connected with the rear support rod 5; as shown in fig. 3, after connection, the elastic collar 10 is hidden between the limiting cover plate 14 and the rear support bar 5, so that connection traces can be hidden, and the structure is very simple and beautiful; and (4) the appearance is attractive.

And the regulating portion 6 protrudes outward from the rear stay 5 in the left-right direction without exceeding the front stay 4. When a user sits on the seat, the waist rest main body 2 can be controlled to lift up and down by stretching the two hands of the user at the side part of the back support 1, and the adjustment is convenient; the adjusting part 6 is only exposed at the rear end of the back bracket 1 and is not exposed at the front end of the back bracket 1; so that the structure is beautiful.

Claims (9)

1. A lumbar support device for a chair, comprising: the waist support comprises a back support and a waist support main body, wherein the back support comprises back side rods respectively positioned at two sides, and a longitudinal sliding groove which is hollowed out left and right is arranged in the middle of each back side rod; the two ends of the waist rest main body are provided with adjusting parts positioned in the sliding grooves, and the adjusting parts are attached to the back side rod backwards; a sliding mechanism is arranged between the adjusting part and the back side rod, and comprises a guide convex strip which is arranged on the adjusting part and protrudes backwards and a sliding support part which is correspondingly arranged on the back side rod; the sliding support part is provided with a longitudinal guide rail which can be in sliding fit with the guide convex strip; the shapes of the side sections of the guide rails are all in a regular circular arc shape, and the rear ends of the guide convex strips are configured to have a radian matched with the guide rails; the rear end of direction sand grip and guide rail inner wall laminating and direction sand grip can follow the guide rail and slide from top to bottom.

2. The lumbar support of a chair according to claim 1, wherein: the back side rod comprises a front support rod positioned in front of the sliding groove and a rear support rod positioned behind the sliding groove; the back supporting rod is of an arc structure protruding forwards at the waist rest position, and the adjusting part is arranged on the back supporting rod in a backward leaning mode.

3. The lumbar support of a chair according to claim 2, wherein: the rear supporting rod protrudes forwards at the waist rest position to form an arc protruding part, and the sliding supporting part is arranged on the arc protruding part; the waist rest main body can move up and down to be adjusted along the arc-shaped track of the arc-shaped convex part.

4. The lumbar support of a chair according to claim 1, wherein: a lifting adjusting mechanism is also arranged between the sliding supporting part and the adjusting part, and comprises an elastic clamping ring arranged on the sliding supporting part and a longitudinal gear sliding chute correspondingly arranged on the adjusting part; the gear sliding chutes penetrate through the waist rest in front and at back; two sides of the gear sliding chute are respectively provided with a positioning clamping groove which is longitudinally spaced; when direction sand grip sliding fit is in the guide rail, the elasticity rand is located the gear spout and the both ends of elasticity rand can with the positioning channel joint respectively.

5. The lumbar support of a chair according to claim 4, wherein: a limiting cover plate is further arranged at the gear sliding chute at the front end of the waist rest main body, and the width of the limiting cover plate is wider than that of the gear sliding chute; the limiting cover plate is connected to the rear side frame to limit the waist rest main body to be separated from the rear side frame; the adjusting part is clamped between the limiting cover plate and the rear side frame.

6. The lumbar support of a chair according to claim 5, wherein: the sliding fit part is provided with connecting columns which are used for connecting the limiting cover plate and are spaced up and down; the limiting cover plate is provided with a connecting hole, and the limiting cover plate is fixedly connected with the connecting column through screws.

7. The lumbar support of a chair according to claim 6, wherein: the sliding fit part is further provided with a limiting column used for connecting the elastic clamping ring, and the limiting column is located between the two connecting columns.

8. The lumbar support of a chair according to claim 4, wherein: the guide convex strips and the gear sliding grooves are adjacently arranged on the left and right sides.

9. The lumbar support of a chair according to claim 2, wherein: the end of the adjusting part protrudes outwards from the rear supporting rod.

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