CN218185965U

CN218185965U - Chair back connecting structure

Info

Publication number: CN218185965U
Application number: CN202222461598.7U
Authority: CN
Inventors: 朱月新
Original assignee: Zhejiang Kemi Bear Technology Co ltd
Current assignee: Zhejiang Kemi Bear Technology Co ltd
Priority date: 2022-09-16
Filing date: 2022-09-16
Publication date: 2023-01-03
Anticipated expiration: 2032-09-16

Abstract

The utility model provides a chair back connecting structure, which comprises a back bracket and a chair back; the back support comprises back support rods which are respectively positioned at the left side and the right side; the back support rod is longitudinally arranged and is of a metal tubular structure; each back support rod is provided with a connecting part, and the rear end of the chair back is correspondingly provided with a connecting torsion block protruding backwards; the connecting part is preset with positioning holes and mounting holes which penetrate through the back support rod in the front and back direction, and the positioning holes and the mounting holes are longitudinally arranged at intervals; a positioning pin and a connecting hole are correspondingly arranged at the rear end of the connecting torsion block; the connecting torsion block is attached to the connecting part in a front-and-back manner so that the positioning pin penetrates through the positioning hole; and the connecting torsion block is fixedly connected with the back support rod by screws, and the screws penetrate through the mounting holes forwards from the rear end of the back support rod and are connected in the connecting holes. The back support rod can support and connect the torsion block; the positioning pins and the screws are longitudinally arranged, so that the stress at the connecting part can be dispersed; the structure of the joint is stable, the connection is tight, and the looseness is not easy to happen.

Description

Chair back connecting structure

Technical Field

The utility model relates to a thing to sit on field, in particular to back of chair connection structure.

Background

The chair is a necessary product for every family and is a necessary product for people to rest and study. The children chair is the chair that is designed specially to children, and the use in present life has been very extensive, and many families that have children have all purchased children's chair and let children use, and this must have many benefits wherein, and children's chair can carry out multiple regulation, all can adjust in height, position of sitting and comfort level, brings the comfortable experience of bigger degree for children to the most help children reaches the effect of preventing hunchback eyeshield, high efficiency study. And for child chairs, one of the most important points for parents is the safety of the chair, i.e. the structural stability of the chair.

The chair back of the existing child chair is usually supported by a steel pipe supporting piece, and the chair back is arranged on the steel pipe supporting piece; utility model for instance with patent number CN201721538957.7 discloses an adjustable study chair that does benefit to children's health, include: the chair comprises a chair back, a bent pipe I, a bent pipe II, a movable adjusting I, a movable adjusting II, a bent pipe connecting piece, a chair back twist, a cushion support, an operating handle, a hydraulic rod and a chair seat underframe; the utility model discloses adapt to child's different heights, the regulation of chair height, degree of depth, inclination can be carried out to the requirement of chair comfort level at different ages. The height of the chair can be adjusted by feet to step on the ground, so that a child can sit comfortably and concentrate on attention. The regulation of the back of the chair can be freely regulated according to the requirements of the body curve and the comfort level of the child, the child leans against the back of the chair, the two sides of the back can be wrapped by the environment-friendly design of the back of the chair, the burden of the waist and the back of the user is lightened, and the health of the spine is protected. The child can raise the head and the chest as long as the child leans against the chair back, and carefully study with correct sitting posture. The chair back of the learning chair is supported by two connected bent pipes; the joint of the bent pipe is of a cross rod structure; and the chair back can twist relative to the elbow for use experience is comfortable. However, when the chair back is supported by the transverse bent pipe, the bent pipe can not effectively support the chair back when the chair back swings up and down in the vertical direction; making the support insufficient; and the structural strength of the joint cannot be guaranteed.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provide a chair back connecting structure; the chair back is arranged at the front end of the back bracket, the back support rod is longitudinally arranged, and the back support rod is provided with a connecting part; the connecting torsion block at the back end of the chair is attached to the connecting part in a front-back manner, so that the positioning pin is inserted into the positioning hole; the back support rod is connected with the connecting torsion block through a screw, and the connection is convenient and fast. After the connection is finished, when the chair back bears a user and swings along the up-down direction, the back support rod can better support the connection torsion block; the positioning pins and the screws are longitudinally arranged, and the positioning pins and the screws can disperse stress at the joints; the structure of the joint is stable, the connection is tight, and the looseness is not easy to happen.

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

a chair back connecting structure comprises a back bracket and a chair back; the back support comprises back support rods which are respectively positioned at the left side and the right side; the back support rod is longitudinally arranged and is of a metal tubular structure; each back support rod is provided with a connecting part, and the rear end of the chair back is correspondingly provided with a connecting torsion block protruding backwards; the connecting part is preset with positioning holes and mounting holes which penetrate through the back support rod in the front and back direction, and the positioning holes and the mounting holes are longitudinally arranged at intervals; a positioning pin and a connecting hole are correspondingly arranged at the rear end of the connecting torsion block; the connecting torsion block is attached to the connecting part in a front-back manner so that the positioning pin penetrates through the positioning hole; and the connecting torsion block is fixedly connected with the back support rod by screws, and the screws penetrate through the mounting holes forwards from the rear end of the back support rod and are connected in the connecting holes.

Preferably, the mounting hole is formed in the center of the connecting portion, and the positioning holes are formed in the upper side and the lower side of the mounting hole. Then after the connecting torsion block is connected with the back support rod, when the chair back swings along the up-and-down direction, the back support rod can support the connecting torsion block; the positioning pins and the screws are longitudinally arranged at intervals, so that the stress at the connecting positions can be dispersed by the positioning pins and the screws; the structure of the joint is stable, and the connection is tight and not easy to loosen.

Preferably, the front end of the connecting part is provided with a concave surface which is recessed backwards relative to the back support rod, and the positioning hole and the mounting hole are both arranged in the concave surface. The design makes the connection between the connecting block and the connecting part more compact when the connecting block and the connecting part are attached back and forth; otherwise, the back connecting rod is a steel pipe, so that the back connecting rod is tangent to the connecting torsion block to cause unstable structure of the joint.

Preferably, the connecting twisting block is made of a flexible soft rubber material; the rear end of the connecting torsion block is provided with a rear connecting lug, a hard fixing seat is preset in the rear connecting lug, the positioning pin is arranged on the fixing seat, and the screw is in threaded connection with the inside of the fixing seat. The connecting torsion block is made of flexible soft rubber, so that the chair back can swing; therefore, in order to improve the structural strength of the connecting part, a hard fixed seat is arranged in the rear connecting lug.

Preferably, the fixing seat is made of hard plastic materials, and the fixing seat and the rear connecting lug are encapsulated and injected into a whole. The fixing seat is hidden in the rear connecting convex block while improving the structural strength of the rear connecting convex block.

Preferably, the fixing seat is provided with a threaded hole aligned with the hole position of the connecting hole in advance, and the screw is connected in the threaded hole in a threaded manner.

Preferably, a detachable flexible decorative outer sleeve is further arranged between the connecting part and the connecting torsion block, and the decorative outer sleeve is coated on the connecting part from the rear end of the back support rod. Thereby hiding the connection trace of the screw; and further beautifies the appearance.

Preferably, the decorative coat is made of flexible soft rubber.

Preferably, the back support is formed by integrally bending steel pipes, and the upper ends of the two back support rods are enclosed together. The positioning hole and the mounting hole are convenient to process on the back support rod; the structure of the back support is simple and beautiful, and the back support is positioned at the back end of the chair back and has a non-abrupt shape.

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

the chair back connecting structure of the utility model is characterized in that the chair back is arranged at the front end of the back bracket, the back supporting rod is longitudinally arranged, and the back supporting rod is provided with a connecting part; the connecting torsion block at the back end of the chair is attached to the connecting part in a front-back manner, so that the positioning pin is inserted into the positioning hole, and the installation and the positioning are convenient; and the back support rod is connected with the connecting torsion block by a screw, so that the connection is convenient and quick. After the connection is finished, when the chair back bears a user and swings in the up-down direction, the back support rod can better support the connection torsion block; the positioning pins and the screws are longitudinally arranged, and the positioning pins and the screws can disperse stress at the joints; the structure of the joint is stable, the connection is tight, and the looseness is not easy to occur.

Secondly, the front end of the connecting part is provided with a concave surface which is recessed backwards relative to the back support rod, and the positioning hole and the mounting hole are arranged in the concave surface. The design makes the connection between the connecting block and the connecting part more compact when the connecting block and the connecting part are attached back and forth; otherwise, the back connecting rod is a steel pipe, so that the back connecting rod is tangent to the connecting torsion block to cause unstable structure of the connecting part; the structure design is ingenious.

Moreover, the connecting torsion block is made of a flexible soft rubber material; therefore, a hard fixed seat is preset in the rear connecting lug, and the fixed seat and the rear connecting lug are encapsulated and injected into a whole; the positioning pin is arranged on the fixed seat, so that the screw is in threaded connection with the inside of the fixed seat; effectively improving the structural strength.

Drawings

Fig. 1 is a schematic perspective view of a chair back structure applied to a chair according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of the assembly of the connecting torsion block and the back bracket in the embodiment of the present invention;

fig. 3 is a side view of the assembly of the connecting torsion block and the back bracket in the embodiment of the present invention;

fig. 4 is a schematic perspective view of the connection of the connecting button block and the back bracket according to the embodiment of the present invention;

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

fig. 6 is a schematic perspective view of the connection torsion block according to the embodiment of the present invention.

The figures are numbered: a back support 1; a chair back 2; a back support bar 3; a connecting portion 3a; a connecting torsion block 4; a rear connection bump 4a; a mounting hole 5; a connection hole 501; a positioning hole 6; a positioning pin 7; a screw 8; a fixed seat 9; a threaded hole 10; a decorative cover 11; a concave surface 12.

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. 1-6, the utility model provides a chair back connection structure, which comprises a back support 1 and a chair back 2 connected with the front end of the back support; the back support 1 comprises back support rods 3 respectively positioned at the left side and the right side, and the back support rods 3 are longitudinally arranged and are of metal tubular structures; a connecting part 3a is arranged at the front end of the upper part of each back support rod 3, and connecting torsion blocks 4 protruding backwards are correspondingly arranged on two sides of the rear end of the chair back 2 respectively; the connecting button 4 is attached to the connecting portion 3a of the back support bar 3.

As shown in fig. 2-6, the back support 1 is integrally formed by bending a steel pipe, and is convenient to process; and the upper ends of the two back support rods 3 are enclosed together, so that the back support 1 has a simple and attractive structure, and the back support 1 is positioned at the rear end of the chair back 2 and has a non-abrupt shape. Wherein, the connecting part 3a is provided with a mounting hole 5 which penetrates through the back support rod 3 from front to back and positioning holes 6 which are respectively arranged at the upper side and the lower side of the mounting hole 5; the back support rod 3 is a steel pipe, so that hole site processing is easy and effortless. Correspondingly, the rear end of the connecting torsion block 4 is provided with a rear connecting lug 4a with a certain thickness along the front-rear direction, a connecting hole 501 and positioning pins 7 respectively positioned at the upper side and the lower side of the connecting hole 501 are correspondingly arranged at the central position of the rear end surface of the rear connecting lug 4a; then, when the back support 1 is assembled with the back 2, the rear connecting convex block 4a is attached to the connecting part 3a backwards, so that the upper and lower positioning pins 7 are respectively arranged in the positioning holes 6 in a penetrating manner, and the connecting torsion block 4 and the connecting part 3a are positioned well; the connecting holes 501 can be correspondingly aligned with the front hole position and the rear hole position of the mounting hole 5; then, the back support rod 3 is connected with the connecting torsion block 4 by a screw 8, and the screw 8 penetrates through the mounting hole 5 from the rear end of the back support rod 3 and is in threaded connection with the connecting hole 501; then the assembly of the chair back 2 and the back bracket 1 is completed, and only one screw is adopted for connection, so that the connection is convenient and fast. After the connection is finished, the positioning pins 7 and the screws 8 are longitudinally arranged, so that when the chair back 2 bears a user and swings up and down, the back support rod 3 can better support the connection torsion block 4; the positioning pin 7 and the screw 8 can disperse stress at the connection part; the structure of the joint is stable and the connection is tight; is not easy to loosen.

As shown in fig. 5, the connecting portion 3a has a concave surface 12 recessed backward relative to the back support bar 3, and the positioning hole and the mounting hole 5 are both disposed in the concave surface 12; the design is such that when the rear connecting convex block 4a is attached to the connecting part 3a in a front-back manner, the connection between the two is tighter; otherwise, the back connecting rod 3 is a steel tube, so that the back connecting rod 3 is tangent to the back connecting bump 4a to cause unstable structure at the joint; structural design considerations are more discreet.

As shown in fig. 4-6, the connecting torsion block 4 is made of flexible soft rubber, so that the chair back 2 can swing after the chair back 2 is assembled with the back support 1, and the chair back 2 is more comfortable to use. Therefore, in order to improve the structural strength of the joint, as shown in fig. 6, a hard fixing seat 9 is arranged in the rear connecting projection 4a, the fixing seat 9 is made of hard plastic material, and the fixing seat 9 and the rear connecting projection 4a are encapsulated and injected into a whole, so that the fixing seat 9 is hidden in the rear connecting projection 4a while improving the structural strength of the rear connecting projection 4a; correspondingly, the positioning pin 7 is arranged on the fixed seat 9 and protrudes backwards from the rear connecting convex block 4a; the fixed seat 9 is preset with a threaded hole 10 aligned with the hole site of the connecting hole 501. And then the screw 8 is screwed in the fixed seat 9, so that the connecting structure is stable.

As shown in fig. 1-2, after the assembly of the chair back 2 and the back support 1 is completed, a detachable flexible decorative jacket 11 is further arranged between the connecting portion 3a and the connecting torsion block 4, the decorative jacket 11 is also made of flexible soft rubber, and the decorative jacket 11 is wrapped between the connecting portion 3a and the rear connecting projection 4a from the rear end of the back support rod 3, so that the connecting trace of the screw 8 can be hidden; and further beautifies the appearance.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims

1. A chair back connecting structure is characterized in that: comprises a back bracket and a chair back; the back support comprises back support rods which are respectively positioned at the left side and the right side; the back support rod is longitudinally arranged and is of a metal tubular structure; each back support rod is provided with a connecting part, and the rear end of the chair back is correspondingly provided with a connecting torsion block protruding backwards; the connecting part is preset with positioning holes and mounting holes which penetrate through the back support rod in the front and back direction, and the positioning holes and the mounting holes are longitudinally arranged at intervals; the rear end of the connecting torsion block is correspondingly provided with a positioning pin and a connecting hole; the connecting torsion block is attached to the connecting part in a front-back manner so that the positioning pin penetrates through the positioning hole; and the connecting torsion block is fixedly connected with the back support rod by screws, and the screws penetrate through the mounting holes forwards from the rear end of the back support rod and are connected in the connecting holes.

2. The chair back connection structure of claim 1, wherein: the mounting hole is arranged at the center of the connecting part, and the positioning holes are respectively arranged at the upper side and the lower side of the mounting hole.

3. The chair back connection structure of claim 1, wherein: the front end of the connecting part is provided with a concave surface which is concave backwards relative to the back support rod, and the positioning hole and the mounting hole are arranged in the concave surface.

4. The chair back connection structure of claim 1, wherein: the connecting torsion block is made of a flexible soft rubber material; the rear end of the connecting torsion block is provided with a rear connecting lug, a hard fixing seat is preset in the rear connecting lug, the positioning pin is arranged on the fixing seat, and the screw is in threaded connection with the inside of the fixing seat.

5. The chair back attachment structure of claim 4, wherein: the fixing seat is made of hard plastic materials, and the fixing seat and the rear connecting lug are encapsulated and injected into a whole.

6. The chair back attachment structure of claim 5, wherein: the fixing seat is provided with a threaded hole aligned with the hole position of the connecting hole in advance, and the screw is connected in the threaded hole in a threaded mode.

7. The chair back connection structure of claim 1, wherein: the connecting part and the connecting torsion block are also provided with a detachable flexible decorative jacket, and the decorative jacket is coated at the connecting part from the rear end of the back support rod.

8. The chair back attachment structure of claim 7, wherein: the decorative coat is made of flexible soft rubber.

9. The chair back attachment structure of claim 1, wherein: the back support is formed by integrally bending steel pipes, and the upper ends of the two back support rods are enclosed together.