CN215874101U

CN215874101U - Backrest of children chair

Info

Publication number: CN215874101U
Application number: CN202121660885.XU
Authority: CN
Inventors: 李荣荣
Original assignee: Zhejiang Rongda Smart Home Co ltd
Current assignee: Zhejiang Rongda Smart Home Co ltd
Priority date: 2021-07-21
Filing date: 2021-07-21
Publication date: 2022-02-22
Anticipated expiration: 2031-07-21

Abstract

The utility model provides a backrest of children's chair, includes the base and vertically installs in the branch of base, still includes the connecting piece, and connecting piece one end adjustable connection is connected with back support piece, lower lumbar support piece in branch, the other end, and lower lumbar support piece is located the front side of back support and is used for providing the support to the waist. The utility model has the advantages that the upper back support part and the lower waist support part can be simultaneously connected by the single connecting part through the connecting part, so that the use positions of the upper back support part and the lower waist support part can be adjusted by the single connecting part, the operation is convenient, quick, time-saving and labor-saving, and the lower waist support part is positioned at the front side of the upper back support part and accords with human mechanics.

Description

Backrest of children chair

Technical Field

The utility model relates to the technical field of chairs, in particular to a child chair backrest.

Background

The seat is one of household varieties and is a seat with a long history, along with the development of economy and industrial technology, the requirements of people on offices or living environments are higher and higher, office furniture and household furniture have wider and wider markets in China, the seat is used as one of main office furniture and household furniture, and the comfort level and the attractive appearance degree of the seat become important indexes when people select to use the seat.

Publication No. CN209983860U discloses a chair back structure of a child seat, comprising a back plate and a chair frame, the back plates are all arranged on the chair frame and comprise a left back plate, a right back plate and a waist back plate, a gap with the length of 1-3 cm is reserved between the left back plate and the right back plate, the chair frame comprises a back plate chair frame and a waist rest chair frame, the left back plate and the right back plate are arranged on one end of the back plate chair frame in a relative mirror image manner, the other end of the back plate chair frame is detachably arranged on the lifting sleeve of the back plate chair frame through a bolt, the waist back plate is arranged at one end of the waist back chair frame, the other end of the waist back chair frame is detachably arranged on the waist back chair frame lifting sleeve through a bolt, the back plate chair frame lifting pipe sleeve and the waist rest chair frame lifting sleeve are assembled on the single pipe vertical rod from top to bottom through a detachable connecting structure, and the waist rest chair frame is arranged below the back plate chair frame. This kind of back of the chair structure is comparatively complicated, left backplate and right backplate promptly, the back board is leaned on to the waist is connected through two solitary lifting cover, because need the user to sit on the seat in accommodation process, then lean on left backplate, right backplate and back board are leaned on to the waist, adjust the lifting cover according to the produced comfort of each backplate to different positions, need left arm or right arm to bend to the back of each back after accomplishing the regulation, then screw the location to the lifting cover, this process needs twice to be accomplished, can't realize once two regulations, it is too loaded down with trivial details and time-consuming.

SUMMERY OF THE UTILITY MODEL

The present invention is to solve the above-mentioned drawbacks of the prior art and to provide a child seat back to solve the above-mentioned problems.

The utility model adopts the technical scheme for solving the technical problems that: the backrest of the children chair comprises a base, a support rod and a connecting piece, wherein the support rod is vertically installed on the base, one end of the connecting piece is adjustably connected to the support rod, the other end of the connecting piece is connected with an upper back supporting piece and a lower waist supporting piece, and the lower waist supporting piece is located on the front side of the upper back supporting piece and used for supporting the waist.

The connecting piece is further perfected, the connecting piece is provided with a front part and a rear part, the front part and the rear part are detachably connected, the front part is respectively connected with the upper back supporting piece and the lower waist supporting piece, the rear part is connected with the supporting rod, the upper and lower sliding of the supporting rod is realized through a sliding channel arranged on the connecting piece, and the sliding of the connecting piece is limited through a limiting structure.

The sliding channel is further improved, a mounting hole communicated with the sliding channel is formed in one side of the middle position of the rear portion in the length direction of the sliding channel, and a positioning bolt abutting against the outer surface of the supporting rod is screwed in the mounting hole and serves as a limiting structure.

Further perfection, the outer wall department fixedly connected with that the front portion is close to the rear portion has the first installation piece of first socket, and the rear portion has the first inserted block that extends to the front portion, and partial first inserted block is covered by first installation piece when first inserted block inserts to first socket in.

Further perfect, anterior upper segment part has the second and inserts the piece, goes up back support piece and has and lean against the portion, and the portion of leaning against is close to anterior outer wall's central position department and has seted up the second socket, and part second inserts the piece and is covered by leaning against the portion when the second inserts the piece and inserts to the second socket.

Further perfect, anterior hypomere part has the extension arm that extends to deviating from the rear portion direction to and form between the front portion and be greater than 120 contained angles, the end fixedly connected with of extension arm department is used for the second installation piece be connected with waist support piece down, waist support piece is connected the back with the second installation piece down and is located the front side that the back supported.

Further perfect, lower waist support piece has waist portion of leaning on, two bilateral symmetry's linking arm, and linking arm one end is fixed in the waist and leans on the portion to be close to the outer wall of second installation piece, another end is fixed with the third inserted block, and the second installation piece has the third socket, and partial third inserted block is covered by the second installation piece when the third inserted block inserts to the third socket in.

Further perfection, the connecting arm is obliquely arranged and forms an included angle larger than 120 degrees with the connecting surface of the third inserting block.

Further perfection, the thickness of the part of the connecting arm connected with the third insert block is larger than that of other parts of the connecting arm.

The utility model has the beneficial effects that:

the upper back support part and the lower waist support part can be simultaneously connected through the single connecting part, so that the use positions of the upper back support part and the lower waist support part can be adjusted through the single connecting part, the operation is convenient, quick, time-saving and labor-saving, the lower waist support part is positioned on the front side of the upper back support part and accords with human mechanics, and because a user leans against, the front and back bending angles are formed between the back and the waist, the back can be supported only when the lower waist support part is arranged on the front side of the upper back support part, and the support can be provided for the waist.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the construction of the connector of the present invention;

FIG. 3 is a schematic view of the connecting member of the present invention in combination with an upper back support and a lower lumbar support;

FIG. 4 is a schematic view of the structure of the connecting member and the lower lumbar support member of the present invention.

Detailed Description

The utility model will be further described with reference to the accompanying drawings in which:

with reference to the accompanying drawings: the children chair backrest comprises a base 1 and a support rod 2 vertically installed on the base 1, and further comprises a connecting piece 3, one end of the connecting piece 3 is adjustably connected to the support rod 2, the other end of the connecting piece is connected with an upper back supporting piece 4 and a lower waist supporting piece 5, and the lower waist supporting piece 5 is located on the front side of the upper back supporting piece 4 and used for supporting the waist. The principle of the utility model lies in that the upper back support 4 and the lower waist support 5 can be simultaneously connected by the single connecting piece 3 through the connecting piece 3, so that when the using positions of the upper back support 4 and the lower waist support 5 are adjusted, the operation can be realized through the single connecting piece 3, the operation is convenient, quick, time-saving and labor-saving, and the lower waist support 5 is positioned at the front side of the upper back support 4 and accords with human mechanics, because a user leans against, the back and the waist have a front and back bending angle, the back can be supported only when the lower waist support 5 is arranged at the front side of the upper back support 4, and the waist can also be supported.

For the connecting piece 3, the connecting piece 3 is provided with a front part 31 and a rear part 32, the front part 31 and the rear part 32 are detachably connected, the front part 31 is respectively connected with the upper back supporting piece 4 and the lower waist supporting piece 5, the rear part 32 is connected with the supporting rod 2 and allows the supporting rod 2 to slide up and down through a sliding channel 32-a arranged on the connecting piece, and the sliding of the connecting piece is limited through a limiting structure.

In order to realize the limit function of the limit structure, the rear part 32 is provided with a mounting hole 32-b communicated with the sliding channel 32-a at one side of the central position of the sliding channel 32-a in the length direction, a positioning bolt abutting against the outer surface of the supporting rod 2 is screwed in the mounting hole 32-b and is used as the limit structure, the arrangement can be completed, the sliding of the rear portion 32 is prevented by the frictional resistance generated when the set bolt is pressed against the outer surface of the strut 2, and the thread matching can avoid the self-backing, and meanwhile, the positioning bolt 32-b1 and the supporting rod 2 are made of metal materials, the supporting rod 2 is also arranged in a hollow way, the positioning bolt can generate strong extrusion force by abutting against the supporting rod 2, can make the department of offseting appear the dent, make some positioning bolt can be stuck in through the dent, guarantee limit structure's limit function from this for connecting piece 3 slides after the location and is hindered.

In order to facilitate the detachable connection of the front portion 31 and the rear portion 32, a first mounting block 31-a having a first insertion opening 31-a1 is fixedly connected to the outer wall of the front portion 31 near the rear portion 32, the rear portion 32 has a first insertion block 32-c extending toward the front portion 31, and when the first insertion block 32-c is inserted into the first insertion opening 31-a1, part of the first insertion block 32-c is covered by the first mounting block 31-a, so that the rear portion 32 is connected with the front portion 31, only the first insertion block 32-c is inserted into the first insertion opening 31-a1, and is fixed by a plurality of bolts after being inserted, thereby ensuring the stable connection of the two after being connected, and the operation is convenient, and the first mounting block 31-a can also cover part of the first insertion block 32-c after being accessed, and the wall thickness of the first insertion block 32-c is increased by the wall thickness of the first mounting block 31-a, thereby improving the service strength of the first insert 32-c and increasing the compression resistance thereof.

In order to facilitate the installation of the front part 31 and the upper back support 4, the upper section of the front part 31 is provided with a second insertion block 31-b, the upper back support 4 is provided with a back rest part 41, a second insertion hole 41-a is arranged at the middle position of the back rest part 41 close to the outer wall of the front part 31, when the second insertion block 31-b is inserted into the second insertion hole 41-a, part of the second insertion block 31-b is covered by the back rest part 41, the arrangement can be realized, when the two are connected, only the second insertion block 31-b is inserted into the second insertion hole 41-a, and the two are fixed by a plurality of bolts after being inserted, thereby ensuring the stable connection of the two after the two are connected, being convenient to operate, simultaneously, the back rest part 41 can also cover part of the second insertion block 31-b after entering, the wall thickness of the back rest part 41 is utilized to increase the use wall thickness of the second insertion block 31-b, thereby improving the use strength of the second insert 31-b and increasing the compression resistance thereof.

In order to enable the lower lumbar support 5 to be positioned at the front side of the upper back support 4, the lower section of the front portion 31 has an extension arm 31-c extending away from the rear portion 32 and forming an angle of more than 120 ° with the front portion 31, a second mounting block 31-c1 is fixedly connected to the end of the extension arm 31-c for connecting with the lower lumbar support 5, the lower lumbar support 5 is connected with the second mounting block 31-c1 and then positioned at the front side of the upper back support 4, the arrangement is such that the mounting position of the lower lumbar support 5 is not at the same level as the mounting position of the upper back support 4 through the extension arm 31-c, the extension arm 31-c has a length such that the lower lumbar support 5 can be positioned at the front side of the upper back support 4 and is ergonomical because the user leans against, there is a front-to-back bend angle between the back and the lumbar region, and only when the lower lumbar support 5 is disposed in front of the upper back support 4 can provide both support to the back and support to the lumbar region.

In order to facilitate the installation of the extension arm 31-c and the lower lumbar support 5, the lower lumbar support 5 is provided with a lumbar support part 51 and two connecting arms 52 which are arranged in bilateral symmetry, one end of each connecting arm 52 is fixed on the outer wall of the lumbar support part 51 close to the second mounting block 31-c1, the other end of each connecting arm is fixed with a third insertion block 52-a, the second mounting block 31-c1 is provided with a third insertion opening 31-c11, when the third insertion block 52-a is inserted into the third insertion opening 31-c11, part of the third insertion block 52-a is covered by the second mounting block 31-c1, the connection of the second mounting block 31-c and the third insertion block 52-a can be realized only by inserting the third insertion block 52-a into the third insertion opening 31-c11 and fixing the third insertion block 52-a by a plurality of bolts after the insertion, so that the connection of the second mounting block 31-c1 and the third insertion block 52-a is ensured to be stable in connection and convenient to operate, and the covering part of the second mounting block 31-c 1-a can be covered by the second mounting block, the wall thickness of the second mounting block 31-c1 is used to increase the service wall thickness of the third insert block 52-a, thereby improving the service strength of the third insert block 52-a and increasing the compression resistance thereof.

Further perfected, the connecting arm 52 is inclined and forms an included angle of more than 120 degrees with the connecting surface of the third insert block 52-a, so that the separation position between the lower lumbar support 5 and the upper back support 4 is more distinct, namely the position between the two is not interfered, namely the support for the lumbar is more in place.

Further perfection, the thickness of the part of the connecting arm 52 connected with the third inserting block 52-a is larger than that of the other parts of the connecting arm 52, the arrangement is to increase the connecting strength of the connecting arm 52 and the third inserting block 52-a, because the connecting arm 52 is made of plastic materials and is thinner as a whole, the connecting arm 52 can be slightly folded when being subjected to extrusion force, namely, the connecting arm is bent upwards or downwards, but the bending angle range is only within the range of plus or minus 10 degrees, so that the lower lumbar support part 5 is more flexible to use, and the support for the lumbar is more in place.

While the utility model has been shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the appended claims.

Claims

1. The utility model provides a children's chair back, includes base (1) and vertical branch (2) of installing in base (1), its characterized in that: still include waist by connecting piece (3), waist by connecting piece (3) one end adjustable connect in branch (2), the other end are connected with back support piece (4), lower waist support piece (5) are located go up the front side of back support (4) and be used for providing the support to the waist.

2. The child seat back of claim 1, wherein: the waist rest connecting piece (3) is provided with a front part (31) and a rear part (32), the front part (31) is detachably connected with the rear part (32), the front part (31) is respectively connected with the upper back supporting piece (4) and the lower waist supporting piece (5), the rear part (32) is connected with the supporting rod (2), and the sliding of the supporting rod (2) is realized through a sliding channel (32-a) arranged on the rear part, and the sliding of the supporting rod is limited through a limiting structure.

3. The child seat back of claim 2, wherein: the rear portion (32) is provided with a mounting hole (32-b) communicated with the sliding channel (32-a) on one side of the middle position of the sliding channel (32-a) in the length direction, and a positioning bolt abutting against the outer surface of the support rod (2) is screwed in the mounting hole (32-b) and serves as a limiting structure.

4. The child seat back of claim 2, wherein: a first mounting block (31-a) with a first socket (31-a 1) is fixedly connected to the front part (31) near the outer wall of the rear part (32), the rear part (32) has a first insert (32-c) extending towards the front part (31), and when the first insert (32-c) is inserted into the first socket (31-a 1), part of the first insert (32-c) is covered by the first mounting block (31-a).

5. The child seat back of claim 2, wherein: the upper section of the front portion (31) is provided with a second insertion block (31-b), the upper back support (4) is provided with a back rest portion (41), a second insertion opening (41-a) is formed in the middle position, close to the outer wall of the front portion (31), of the back rest portion (41), and when the second insertion block (31-b) is inserted into the second insertion opening (41-a), part of the second insertion block (31-b) is covered by the back rest portion (41).

6. The child seat back of claim 2, wherein: the lower section of the front part (31) is provided with an extension arm (31-c) extending away from the rear part (32) and forming an included angle larger than 120 degrees with the front part (31), the end of the extension arm (31-c) is fixedly connected with a second mounting block (31-c 1) used for being connected with the lower lumbar support member (5), and the lower lumbar support member (5) is connected with the second mounting block (31-c 1) and then positioned at the front side of the upper back support (4).

7. The child seat back of claim 6, wherein: the lower waist supporting piece (5) is provided with a waist supporting part (51) and two connecting arms (52) which are arranged in a bilateral symmetry mode, one end of each connecting arm (52) is fixed to the waist supporting part (51) close to the outer wall of the corresponding second mounting block (31-c 1), the other end of each connecting arm is fixed with a third inserting block (52-a), the corresponding second mounting block (31-c 1) is provided with a third inserting hole (31-c 11), and when the corresponding third inserting block (52-a) is inserted into the corresponding third inserting hole (31-c 11), part of the corresponding third inserting block (52-a) is covered by the corresponding second mounting block (31-c 1).

8. The child seat back of claim 7, wherein: the connecting arm (52) is obliquely arranged and forms an included angle larger than 120 degrees with the connecting surface of the third inserting block (52-a).

9. The child seat back of claim 8, wherein: the thickness of the part of the connecting arm (52) connected to the third insert (52-a) is greater than the thickness of the other part of the connecting arm (52).