Folding backrest type seat with improved structure

Abstract

A foldable backrest type seat with an improved structure comprises a seat body and a backrest which is arranged on the rear side of the seat body in a foldable mode through a pivot shaft, a first connecting piece is formed on the seat body, a second connecting piece is formed on the backrest, and the pivot shaft penetrates through the first connecting piece and the second connecting piece to form the foldable structure. A locking piece and a damping piece are arranged between the first connecting piece and the second connecting piece, the locking piece locks the first connecting piece and the second connecting piece when the first connecting piece and the second connecting piece are completely stacked and limits relative rotation of the first connecting piece and the second connecting piece, and the damping piece is arranged at the position of the pivot shaft and used for damping the first connecting piece and the second connecting piece. Damping force is generated in the relative rotation process of the first connecting piece and the second connecting piece; the parts of the folding backrest type seat are convenient to process, so that the manufacturing cost is effectively controlled; in addition, a locking piece and a damping piece are additionally arranged between the connecting piece I and the connecting piece II, so that the backrest is more stable in use; and the damping feeling in the folding process gives better product experience to a user.

Description

Technical Field

[0001] The utility model relates to a folding backrest seat with an improved structure. Background Art

[0002] During the transportation of the product, the seat with a foldable backrest can effectively reduce the overall volume by folding the backrest inward, which is of great significance for reducing logistics costs. Publication No. CN204670748U mentions a chair with a foldable backrest. In this scheme, as described in paragraphs 27 and 28 of the specification, "the head 111 is L-shaped, and one side of the end of the head 111 is in an arc shape 1111 to facilitate the rotation of the connecting part; the other side is in a right angle shape 1112 to prevent the connecting part from rotating in the opposite direction; the head 111 is provided with a mounting hole for a rotating connection. The head 2 121 is L-shaped, and one side of the end of the head 2 121 is in an arc shape 1211 to facilitate the rotation of the connecting part; the other side is in a right angle shape 1212 to prevent the connecting part from rotating in the opposite direction; the L-shaped head 121 is provided with a mounting hole for a rotating connection."

[0003] In the chair with a foldable backrest, the processing of the head 111 and the head 2 121 is not convenient, and accordingly, the scrap rate of parts is high, which directly causes the overall manufacturing cost of the chair to be high; in addition, the backrest is always rotatable, and lacks a locking part after unfolding and a damping part during the folding process. When placed, the backrest may rotate forward due to external force, affecting the appearance. The product lacks a limiting measure for the backrest when it is unfolded to the maximum position, which may cause the backrest to fold forward during use, posing a safety hazard of accidental injury; during the folding process, due to the lack of a certain damping feeling, the product experience needs to be further improved. Summary of the Invention

[0004] In view of the shortcomings existing in the above problems, the utility model provides a folding backrest seat with an improved structure.

[0005] To achieve the above-mentioned purpose, the utility model provides a folding backrest seat with an improved structure, comprising a seat body and a backrest foldably arranged on the rear side of the seat body by a pivot axis, a connecting member 1 is formed on the seat body, a connecting member 2 is formed on the backrest, the pivot axis passes through the connecting member 1 and the connecting member 2 to form the above-mentioned foldable structure, a locking member and a damping member are provided between the connecting member 1 and the connecting member 2, the locking member locks the connecting member 1 and the connecting member 2 when they are completely overlapped, thereby limiting the relative rotation between the two, and the damping member is arranged at the pivot axis to generate a damping force during the relative rotation of the connecting member 1 and the connecting member 2.

[0006] Furthermore, the locking member includes a spring and a latch, and the connecting member is formed with a latch hole. Under the elastic force of the spring, the latch always maintains a tendency to move toward the latch hole.

[0007] Furthermore, the damping member is a plurality of spring balls uniformly distributed around the pivot axis.

[0008] Furthermore, the spring ball is arranged on the first connecting member, and a positioning hole is formed on the second connecting member corresponding to the spring ball.

[0009] Furthermore, a limiting protrusion is formed on the first connecting member, and a limiting groove is formed on the second connecting member. The limiting protrusion and the limiting groove interact with each other to play a limiting role.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: the parts of the folding backrest seat are easy to process, which effectively controls the manufacturing cost; in addition, a locking part and a damping part are added between the connecting part 1 and the connecting part 2, which makes the backrest more stable when in use and increases safety during use; the damping feeling during the folding process gives the user a better product experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A perspective view of a folding backrest seat with improved structure (flattened state);

[0012] Figure 2 An exploded view of a structurally improved folding backrest seat;

[0013] Figure 3 is a schematic diagram of the locking member involved;

[0014] Figure 4 is a schematic diagram of the damping member involved;

[0015] Figure 5 The present invention is a perspective view of a folding backrest seat with improved structure (folded state).

[0016] In the figure: 1. Seat body; 11. Connecting part 1; 111. Latch hole; 112. Limiting protrusion; 2. Pivot shaft; 3. Backrest; 31. Connecting part 2; 311. Positioning hole; 312. Limiting groove; 4. Locking part; 41. Spring; 42. Latch; 5. Damping part. DETAILED DESCRIPTION

[0017] like Figures 1 to 5As shown, a folding backrest seat with an improved structure of an embodiment of the present invention includes a seat body 1, a backrest 3 foldably configured on the rear side of the seat body 1 by a pivot shaft 2, a connecting member 11 is formed on the seat body 1, and a connecting member 2 31 is formed on the backrest 3, the pivot shaft 2 passes through the connecting member 11 and the connecting member 2 31 to form the above-mentioned foldable structure, a locking member 4 and a damping member 5 are provided between the connecting member 11 and the connecting member 2 31, the locking member 4 locks the connecting member 11 and the connecting member 2 31 when they are completely overlapped, limiting the relative rotation between the two, and the damping member 5 is arranged at the pivot shaft 2 to prevent the connecting member 11 and the connecting member 2 from rotating. During the relative rotation of the two 31, a damping force is generated; the locking member 4 includes a spring 41 and a pin 42, and the connecting member 1 11 is formed with a pin hole 111. Under the elastic force of the spring 41, the pin 42 always maintains a tendency to move toward the pin hole 111; the damping member 5 is a plurality of spring balls uniformly distributed around the pivot shaft 2; the spring balls are arranged on the connecting member 1 11, and positioning holes 311 are formed on the connecting member 2 31 corresponding to the spring balls; a limiting protrusion 112 is also formed on the connecting member 1 11, and a limiting groove 312 is also formed on the connecting member 2 31, and the limiting protrusion 112 interacts with the limiting groove 312 to play a limiting role.

[0018] The parts of the folding backrest seat are easy to process, which effectively controls the manufacturing cost. In addition, a locking member and a damping member are added between the first connector and the second connector, which makes the backrest more stable when in use and increases safety during use. The damping feeling during the folding process gives the user a better product experience.

[0019] In order to facilitate understanding of the present invention, the following description will be given in conjunction with the accompanying drawings.

[0020] Figure 1 The middle backrest 3 is in the unfolded state. When it needs to be folded, first pull out the latch 42 so that the latch 42 leaves the latch hole 111. In this way, the backrest 3 can rotate with the pivot axis 2 as the rotation center. The folded state is as follows: Figure 5 As shown, during the rotation process, the damping member 5 plays a role of damping and slowing down; when the backrest 3 is unfolded again, under the action of the spring 41, the latch 42 automatically enters the latch hole 111 and is locked again.

[0021] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A structurally improved folding backrest chair, comprising a seat body (1), a backrest (3) foldably arranged at the rear side of the seat body (1) by a pivot shaft (2), a first connecting member (11) formed on the seat body (1), a second connecting member (31) formed on the backrest (3), the pivot shaft (2) passing through the first connecting member (11) and the second connecting member (31) to form a foldable structure, characterized in that: A locking member (4) and a damping member (5) are provided between the first connecting member (11) and the second connecting member (31). The locking member (4) locks the first connecting member (11) and the second connecting member (31) when they are completely overlapped, thereby limiting the relative rotation between the two. The damping member (5) is arranged at the pivot shaft (2) to generate a damping force during the relative rotation between the first connecting member (11) and the second connecting member (31).

2. The structurally improved folding backrest seat according to claim 1, characterized in that: The locking member (4) includes a spring (41) and a latch (42), and the connecting member (11) is formed with a latch hole (111). Under the elastic force of the spring (41), the latch (42) always maintains a tendency to move toward the latch hole (111).

3. The structurally improved folding backrest seat according to claim 2, characterized in that: The damping member (5) is a plurality of spring balls uniformly distributed around the pivot shaft (2).

4. The structurally improved folding backrest seat according to claim 3, characterized in that: The spring ball is arranged on the connecting member 1 (11), and a positioning hole (311) is formed on the connecting member 2 (31) corresponding to the spring ball.

5. The structurally improved folding backrest seat according to claim 1, characterized in that: The first connecting member (11) is further formed with a limiting protrusion (112), and the second connecting member (31) is further formed with a limiting groove (312). The limiting protrusion (112) and the limiting groove (312) interact with each other to play a limiting role.

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