CN217185374U

CN217185374U - Adjustable seat back

Info

Publication number: CN217185374U
Application number: CN202220295335.0U
Authority: CN
Inventors: 廖建甜
Original assignee: Foshan Hengfa Furniture Technology Co ltd
Current assignee: Foshan Hengfa Furniture Technology Co ltd
Priority date: 2022-02-15
Filing date: 2022-02-15
Publication date: 2022-08-16
Anticipated expiration: 2032-02-15

Abstract

The utility model discloses an adjustable seat backrest, which is characterized in that the adjustable seat backrest comprises a back plate, a backrest support frame movably arranged on the back plate, a backrest support frame arranged on the backrest support frame and a headrest support, wherein the backrest support frame comprises an upper swinging support plate frame and a lower swinging support plate frame which are respectively hinged with the backrest support frame; an upper slot is arranged in the backrest support seat, and a headrest support plate frame corresponding to the upper slot is arranged on the headrest support. The utility model discloses simple structure, the operation is adjusted conveniently.

Description

Adjustable seat back

Technical Field

The utility model relates to a seat technical field, more specifically relates to an adjustable backrest.

Background

The chair back and the chair seat of many chairs on the market at present are all fixed connection structure, and the user leans on the in-process of leaning on and leaning on, and the chair seat back especially waist is by breaking away from human waist, directly forms the space, leads to the seat to lose the support to human waist, commonly known as "run the waist", and human backbone obtains effective support, sits for a long time and leads to a great deal of health problem easily. In order to solve the problems, the office chair with the adjustable back comprises a chair seat and an extension plate, wherein the extension plate is embedded at the front side of the chair seat, a through groove is formed in the rear side of the chair seat, slide rails are fixed on the inner wall of the chair seat through screws, racks are embedded in the slide rails in a sliding manner, a rotating shaft is rotatably connected between two opposite side walls of the chair seat through a bearing, secondary gears are fixedly connected at two ends of the rotating shaft, a transmission gear is fixedly sleeved on the outer wall of the middle part of the rotating shaft, a main gear is embedded at two sides of the chair seat through the rotation of the bearing, and a swinging frame is fixedly connected between rotating shafts of the two main gears. The extending plate can support the buttocks and the lower sides of the thighs of a human body, and a user can keep a good sitting posture. But the defects are that the upper and lower positions of the headrest are not adjustable, and the backrest can not be well attached to the back of a human body, so that improvement is needed.

Disclosure of Invention

The utility model aims at providing an adjustable seat backrest with simple structure and convenient adjustment for solving the defects of the prior art.

The utility model discloses an adopt following technical solution to realize above-mentioned purpose: the utility model provides an adjustable backrest, its characterized in that, it includes backplate and activity sets up back support frame seat, back support frame, the headrest support of setting on back support frame seat on the backplate.

The backrest support frame comprises an upper swinging support plate frame and a lower swinging support plate frame, and the upper swinging support plate frame and the lower swinging support plate frame are respectively hinged with the backrest support seat.

An upper slot is arranged in the backrest support seat, and a headrest support plate frame corresponding to the upper slot is arranged on the headrest support.

As a further explanation of the above scheme, a plurality of lifting gear slots are arranged on the back plate, and the back of the backrest bracket base is provided with a positioning fixture block movably clamped with the lifting gear slots.

Furthermore, the surface of the headrest supporting plate frame is provided with a limiting adjusting rack, the backrest support base is provided with a positioning hole, a marble and a marble pressing plate, the marble is movably arranged in the positioning hole, the marble pressing plate is pressed above the marble, and the marble is movably pressed and matched with the limiting adjusting rack.

Furthermore, the middle part of the headrest supporting plate frame is provided with an inserting plate, the two sides of the inserting plate are respectively provided with a limiting adjusting rack, the end part of the inserting plate is provided with a positioning lug, the slot is provided with a slot hole, and the positioning lug is movably clamped and matched with the slot hole.

Furthermore, the bottom of the lower swinging support plate frame is provided with an upper swinging support rod and a lower swinging support rod, the upper swinging support rod is hinged with the backrest support seat, the end part of the lower swinging support rod is hinged with a lower sliding block component, and the backrest support seat is provided with a sliding guide groove corresponding to the lower sliding block component.

Furthermore, the bottom of the sliding guide groove is provided with teeth, the lower sliding block component is internally provided with an elastic sheet, and the elastic sheet is in sliding contact with the teeth.

Further, the lower sliding block component comprises a lower sliding block and a manual shifting block movably arranged on the side portion of the lower sliding block, the elastic piece is in an inverted V shape, the lower sliding block is provided with a caulking groove corresponding to the elastic piece, the elastic piece is arranged above the manual shifting block, and two ends of the elastic piece are respectively provided with a bending portion in sliding contact with the teeth.

Furthermore, the end part of the lower sliding block is provided with a hinged positioning part corresponding to the lower swinging support rod, the hinged positioning part is provided with a hinged shaft connected with the lower swinging support rod, and a handle is arranged on the manual shifting block.

Furthermore, the end part of the sliding guide groove is fixedly provided with a baffle, and the baffle is fixedly connected with the backrest bracket base through a fastener to stop the lower sliding block component in the sliding guide groove.

The utility model adopts the beneficial effect that above-mentioned technical solution can reach is.

The utility model discloses a mainly set up the back support frame on the backplate by backplate and activity, the back support frame of setting on the back support frame, the backrest structure that headrest support constitutes, the back support frame includes upper and lower swing support grillage, upper and lower swing support grillage is articulated with back support frame seat respectively, be provided with the slot in the back support frame seat, headrest support is provided with the headrest support grillage that corresponds with last slot, moreover, the steam generator is simple in structure, headrest and back support are all adjustable, the operation is simple and convenient, make the back can laminate human back more.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the present invention.

Fig. 3 is a schematic view of the backrest frame base mounting structure of the present invention.

Fig. 4 is a schematic diagram of the back plate structure of the present invention.

Fig. 5 is a schematic view of the back plate structure of the present invention.

Fig. 6 is a schematic view of the headrest bracket structure.

Description of reference numerals: 1. the backrest comprises a back plate 2, a backrest support base 2-1, a backrest support base 2-2, a backrest support cover 2-3, positioning holes 2-4, marble pressing plates 2-5, sliding guide grooves 2-51, teeth 3, a backrest support frame 3-1, an upper swing support plate frame 3-2, a lower swing support plate frame 3-21, an upper swing support rod 3-22, a lower swing support rod 3-23, a lower sliding block component 3-231, a lower sliding block component 3-232, a manual shifting block 3-3, a middle fixed support plate frame 3-4, a waist support plate frame 4, a headrest support 5, a hinge shaft 6, a positioning pressing plate 7, a headrest support plate frame 7-1, a limiting adjusting rack 7-2, a plug-in plate 7-21, A positioning bump 8, a back plate 8-1, a lifting gear clamping groove 8-2 and a positioning clamping block.

Detailed Description

In the description of the present invention, it should be noted that, for the orientation words, if there are terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation and positional relationship indicated are based on the orientation or positional relationship shown in the drawings, and only for the convenience of describing the present invention and simplifying the description, it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and not be construed as limiting the specific scope of the present invention.

Furthermore, if the terms "first" and "second" are used for descriptive purposes only, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. Thus, a definition of "a first" or "a second" feature may, clearly or implicitly, include one or more of the features, and in the description of the invention, "at least" means one or more than one unless specifically defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "assembled", "connected", and "connected", if any, are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; the two elements can be directly connected or connected through an intermediate medium, and the two elements can be communicated with each other. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.

In the present application, unless otherwise specified or limited, "above" or "below" a first feature may include the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other through another feature therebetween. Also, the first feature being "above," "below," and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply an elevation which indicates a level of the first feature being higher than an elevation of the second feature. The first feature being "above", "below" and "beneath" the second feature includes the first feature being directly below or obliquely below the second feature, or merely means that the first feature is at a lower level than the second feature.

The following description will be further made in conjunction with the accompanying drawings of the specification, so that the technical solution and the advantages of the present invention are clearer and clearer. The embodiments described below are exemplary and are intended to be illustrative of the present invention, but should not be construed as limiting the invention.

As shown in fig. 1-6, the utility model relates to an adjustable seat back, which comprises a back plate 1, a back support base 2 movably arranged on the back plate, a back support frame 3 arranged on the back support base 2, and a headrest support 4, wherein the back support frame 3 comprises an upper swinging support plate frame 3-1 and a lower swinging support plate frame 3-2 which are respectively hinged with the back support base 2; a middle fixed supporting plate frame 3-3 is arranged between the upper swinging supporting plate frame and the lower swinging supporting plate frame. The lower swing supporting plate frame is annular, the middle part of the lower swing supporting plate is provided with a waist leaning supporting plate frame 3-4, the waist leaning supporting plate frame comprises a supporting framework and a waist leaning supporting plate fixed on the supporting framework, stable support is formed on the waist of a human body, and comfort is improved. In this embodiment, the support frame is Y-shaped, and the support frame has two waist support plates. The backrest support base 2 comprises a backrest support base 2-1 and a backrest support cover 2-2, and the backrest support cover is fixed on the backrest support base through a fastener. The upper swing support plate frame is provided with an upper swing arm hinged with the backrest support base, the backrest support housing is provided with a groove position corresponding to the hinge shaft 5, and a positioning pressing plate 6 is fixed above the groove position to position the hinge shaft.

An upper slot is arranged in the backrest support seat 2, and a headrest support plate frame 7 corresponding to the upper slot is arranged on the headrest support 4. The back plate 8 is provided with a plurality of lifting gear clamping grooves 8-1, and the back of the backrest support seat is provided with a positioning clamping block 8-2 which is movably clamped with the lifting gear clamping grooves 8-1. The surface of the headrest supporting plate frame is provided with a limit adjusting rack 7-1, the backrest support base is provided with a positioning hole 2-3 and a marble and marble pressing plate 2-4, the marble is movably arranged in the positioning hole, the marble pressing plate is pressed above the marble, and the marble is movably pressed and matched with the limit adjusting rack. The middle part of the headrest supporting plate frame 7 is provided with an inserting plate 7-2, the two sides of the inserting plate are respectively provided with a limiting adjusting rack, the end part of the inserting plate is provided with a positioning lug 7-21, the slot is provided with a slot hole, and the positioning lug is movably clamped and matched with the slot hole.

The bottom of the lower swing supporting plate frame 3-2 is provided with an upper swing supporting rod 3-21 and a lower swing supporting rod 3-22, the upper swing supporting rod is hinged with a backrest support seat, the end part of the lower swing supporting rod is hinged with a lower sliding block component 3-23, and the backrest support seat is provided with a sliding guide groove 2-5 corresponding to the lower sliding block component. The bottom of the sliding guide groove is provided with teeth 2-51, the lower sliding block component is internally provided with an elastic sheet, and the elastic sheet is in sliding contact with the teeth. In this embodiment, the lower slider assembly 3-23 includes a lower slider 3-231 and a manual shifting block 3-232 movably disposed on a side portion of the lower slider, the elastic piece is in an inverted V shape, the lower slider is provided with a caulking groove corresponding to the elastic piece, the elastic piece is disposed above the manual shifting block, and two ends of the elastic piece are respectively provided with a bending portion in sliding contact with the teeth.

The end part of the lower sliding block is provided with a hinged positioning part corresponding to the lower swinging support rod, the hinged positioning part is provided with a hinged shaft connected with the lower swinging support rod, and the manual shifting block 3-232 is provided with a handle. The end part of the sliding guide groove is fixed with a baffle which is fixedly connected with the backrest bracket base through a fastener to stop the lower sliding block component in the sliding guide groove.

Compared with the prior art, the utility model, adopt mainly by the backplate with the activity set up the back support frame on the backplate, the back support frame of setting on the back support frame seat, the seat back structure that the headrest support constitutes, the back support frame includes, the support grillage swings down, it is articulated with back support frame seat respectively to go up, the support grillage swings down, be provided with the slot in the back support frame seat, the headrest support is provided with the headrest support grillage that corresponds with last slot, moreover, the steam generator is simple in structure, headrest and back support are all adjustable, and easy operation is convenient, make the back can laminate human back more.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and improvements can be made without departing from the inventive concept, and all of them belong to the protection scope of the present invention.

Claims

1. An adjustable seat backrest is characterized by comprising a back plate, a backrest bracket seat movably arranged on the back plate, a backrest support frame arranged on the backrest bracket seat and a headrest bracket,

the backrest support frame comprises an upper swinging support plate frame and a lower swinging support plate frame which are respectively hinged with the backrest support seat;

2. The adjustable seat backrest according to claim 1, wherein a plurality of lifting gear slots are arranged on the back plate, and a positioning fixture block is movably clamped with the lifting gear slots at the back of the backrest support base.

3. The adjustable seat back of claim 1, wherein a limiting adjustment rack is disposed on a surface of the headrest supporting plate frame, a positioning hole, a marble and a marble pressing plate are disposed on the backrest support base, the marble is movably disposed in the positioning hole, the marble pressing plate is pressed against the top of the marble, and the marble is movably pressed and matched with the limiting adjustment rack.

4. The adjustable seat back of claim 1, wherein the middle of the headrest supporting plate frame is provided with a plug plate, both sides of the plug plate are provided with limit adjusting racks, the end of the plug plate is provided with a positioning lug, the slot is provided with a slot hole, and the positioning lug is movably clamped and matched with the slot hole.

5. The adjustable seat back according to claim 1, wherein the bottom of the lower swing supporting plate frame is provided with an upper swing supporting rod and a lower swing supporting rod, the upper swing supporting rod is hinged with the back support frame seat, the end part of the lower swing supporting rod is hinged with the lower sliding block component, and the back support frame seat is provided with a sliding guide groove corresponding to the lower sliding block component.

6. The adjustable seat back of claim 5, wherein teeth are disposed at a bottom of the sliding guide slot, and a spring plate is disposed in the lower slider assembly and slidably contacts the teeth.

7. The adjustable seat backrest as claimed in claim 5, wherein the lower slider assembly comprises a lower slider and a manual shifting block movably arranged at a side portion of the lower slider, the elastic piece is in an inverted V shape, the lower slider is provided with a caulking groove corresponding to the elastic piece, the elastic piece is arranged above the manual shifting block, and two ends of the elastic piece are respectively provided with a bending portion and are in sliding contact with the teeth.

8. The adjustable seat back of claim 7, wherein the end of the lower slider is provided with a hinge positioning portion corresponding to the lower swinging support rod, the hinge positioning portion is provided with a hinge shaft connected with the lower swinging support rod, and the manual shifting block is provided with a handle.

9. The adjustable seat back of claim 5, wherein a stop plate is fixed to an end of the sliding guide slot, and the stop plate is fixedly connected to the back support base through a fastener to stop the lower slide assembly in the sliding guide slot.

10. The adjustable seat back of claim 1, wherein a lumbar support plate bracket is provided in a middle portion of the lower swing support plate.