Office chair

Abstract

The office chair comprises a fixed seat frame and a handrail assembly, the fixed seat frame comprises a left side arm, a right side arm and a supporting bottom plate, the whole fixed seat frame is in a U shape, and the left side arm and the right side arm are of tubular structures with openings in the lower ends; the armrest assembly comprises an armrest plate and a supporting arm, the armrest plate is fixed to the upper end of the supporting arm, and the armrest plate provides transverse support; the supporting arms are fixed in the tubular structures of the left and right side arms in a liftable manner; a left side arm and a right side arm of the fixed seat frame are respectively fixed with the left side edge and the right side edge of the chair back frame through first connecting pieces, a supporting bottom plate of the fixed seat frame is fixed on the chair seat through second connecting pieces, the rear ends of the second connecting pieces are fixed on the supporting bottom plate, and the front ends of the second connecting pieces are fixed with the chair seat. According to the scheme, the fixed seat frame is connected with the armrests, the chair seat and the chair back, and the overall mounting structure is simple and compact.

Description

Technical Field

[0001] The utility model relates to the technical field of office chairs, in particular to an office chair. Background Art

[0002] The armrest mechanisms of existing office chairs are usually independent components, and the left and right armrest mechanisms are respectively installed on the left and right sides of the seat, and the installation process is relatively complex. There are also some structures that connect the armrests on both sides, the seat and the backrest frame through a fixed seat frame. However, in such structures, the fixed seat frame usually has a relatively large volume in order to connect with other parts of the structure, resulting in an overall structure of the office chair after installation not being concise enough. Summary of the Invention

[0003] In order to solve the above problems, the purpose of the utility model is to provide an office chair, in which a fixed seat frame is provided to connect the armrest, the seat and the backrest, and the overall installation structure is simple and compact.

[0004] An office chair includes a fixed seat frame and an armrest assembly. The fixed frame seat includes a left arm, a right arm and a support bottom plate. The fixed seat frame is integrally U-shaped, and the left and right armrests are tubular structures with open lower ends; the armrest assembly includes an armrest plate and a support arm. The armrest plate is fixed to the upper end of the support arm, and the armrest plate provides lateral support; the support arm can be lifted and fixed in the tubular structures of the left and right armrests; the left and right armrests of the fixed seat frame are respectively fixed to the left and right sides of the backrest frame through a first connecting member. The first connecting member includes a first connecting edge and a second connecting edge, and the first connecting edge and the second connecting edge are arranged in an L shape. The first connecting edge is fixed to the side arm of the fixed seat frame, and the second connecting edge is fixed to the side of the backrest frame; the support bottom plate of the fixed seat frame is fixed to the seat through a second connecting member. The rear end of the second connecting member is fixed to the support bottom plate, and the front end of the second connecting member is fixed to the seat.

[0005] Preferably, the left and right armrests of the fixed seat frame have a curved arc.

[0006] Preferably, the first connecting member and the second connecting member are plate-shaped profiles.

[0007] Preferably, a positioning groove is provided at the bottom of the support bottom plate, a connecting portion is formed between the positioning grooves, and a first connecting hole is provided on the connecting portion; at least a part of the second connecting member connected to the support plate at its rear end is provided with a positioning side edge that is inserted and matched with the positioning groove. After the positioning side edge and the positioning groove are installed in place, the bottom of the second connecting member abuts against the connecting portion and the second connecting holes on the second connecting member are aligned with the first connecting holes on the connecting portion one by one.

[0008] Preferably, an upgrade locking mechanism is provided between the fixed tube and the support arm.

[0009] Due to the adoption of the above - mentioned solution, in this utility model, the armrest assembly is fixed in the tubular structures of the left and right side arms of the fixed seat frame. The backrest frame is fixed to the fixed seat frame through an "L"-shaped first connecting piece. The fixed seat frame is fixed to the seat through a second connecting piece, and the second connecting piece is located below the seat. Thus, the connection of various parts of the office chair can be completed through the U - shaped fixed seat frame, and the overall structure is simple and compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a schematic structural diagram of the present application;

[0011] Figure 2 is Figure 1 a schematic structural diagram from another angle;

[0012] Figure 3 is a schematic structural diagram of the fixed seat frame, the armrest assembly, and the backrest frame;

[0013] Figure 4 is Figure 3 a schematic structural diagram from another angle.

[0014] Reference numerals:

[0015] Fixed seat frame 1, left side arm 11, right side arm 12, support base plate 13, positioning groove 131, connecting portion 132, armrest assembly 2, armrest plate 21, support arm 22, backrest frame 3, first connecting piece 4, first connecting edge 41, second connecting edge 42, second connecting piece 5, strengthening structure 51. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The embodiments of the present utility model will be described in detail below.

[0017] As Figures 1-4 shown, this embodiment provides an office chair, which includes a fixed seat frame 1 and an armrest assembly 2. The fixed seat frame includes a right side arm 1211, a right side arm, and a support base plate 13. The fixed seat frame 1 is integrally U - shaped, and the left and right side arms are tubular structures with open lower ends; the armrest assembly 2 includes an armrest plate 21 and a support arm 22. The armrest plate 21 is fixed to the upper end of the support arm 22, and the armrest plate 21 provides lateral support; the support arm 22 is fixedly and vertically adjustable in the tubular structures of the left and right side arms; the left and right side arms of the fixed seat frame 1 are respectively fixed to the left and right side edges of the backrest frame 3 through a first connecting piece 4. The first connecting piece 4 includes a first connecting edge 41 and a second connecting edge 42. The first connecting edge 41 and the second connecting edge 42 are arranged in an L - shape. The first connecting edge 41 is fixed to the side arm of the fixed seat frame 1, and the second connecting edge 42 is fixed to the side edge of the backrest frame 3; the support base plate 13 of the fixed seat frame 1 is fixed to the seat through a second connecting piece 5. The rear end of the second connecting piece 5 is fixed to the support base plate 13, and the front end of the second connecting piece 5 is fixed to the seat.

[0018] The armrest assembly 2 is fixed in the tubular structures of the left and right side arms of the fixed seat frame 1. The backrest frame 3 is fixed to the fixed seat frame 1 through an "L"-shaped first connecting member 4. The fixed seat frame 1 is fixed to the seat through a second connecting member 5, and the second connecting member 5 is located below the seat. Thus, the connection of various parts of the office chair can be completed through the U-shaped fixed seat frame 1, and the overall structure is simple and compact.

[0019] In this embodiment, the armrest plate 21 in the armrest assembly 2 can move back and forth and rotate left and right relative to the support arm 22. The movable connection structure for realizing the above is a conventional structure in the art. For example, the connection structure between the armrest panel and the connecting column disclosed in the publication number CN117918660A. The support arm 22 can be fixedly lifted and lowered in the tubular structures of the left and right side arms. There is a lifting locking mechanism between the fixed tube and the support arm 22. Since the left and right side arms of the fixed seat frame 1 are tubular structures, the support arm 22 can be inserted into the tubular structure and move up and down, and the armrest assembly 2 can be locked at different heights through the lifting locking mechanism. The lifting locking mechanism in the embodiment is a conventional structure in the art. For example, the cooperation locking structure between the limiting cylinder and the adjusting member disclosed in the publication number CN117918660A, the height adjustment assembly disclosed in the publication number CN220916962U, etc.; other locking structures can also be used as long as the height locking can be achieved.

[0020] In this embodiment, the left and right side arms of the fixed seat frame 1 have a curved arc, so that the overall structure of the fixed seat frame 1 is more smooth and the overall appearance is beautiful.

[0021] The first connecting member 4 and the second connecting member 5 are plate-shaped profiles, which can be integrally formed steel structures or welded and formed by multiple plates. Using plate-shaped profiles, the overall connection structure is compact after installation. In this embodiment, a positioning groove 131 is provided at the bottom of the support bottom plate 13, and a connection portion 132 is formed between the positioning grooves 131. A first connection hole is provided on the connection portion 132; at least a part of the second connecting member 5 where it is connected to the support plate at the rear end is provided with a positioning side edge that is inserted and matched with the positioning groove 131. After the positioning side edge and the positioning groove 131 are installed in place, the bottom of the second connecting member 5 abuts against the connection portion 132 and the second connection holes on the second connecting member 5 are aligned with the first connection holes on the connection portion 132 one by one. Through the cooperation of the above positioning groove 131 and the positioning side edge, the corresponding connection holes on the second connecting member 5 and the fixed frame seat can be quickly aligned, which is beneficial to improving the assembly efficiency. Preferably, at least the bottom of the rear end of the second connecting member 5 is concavo-convexly provided to form a reinforcing structure 51. Since the force at the connection between the second connecting member 5 and the fixed seat frame 1 is relatively large, at least a reinforcing structure 51 is provided at the rear end of the second connecting member 5, which can improve the strength of the second connecting member 5 and ensure the reliability of the connection structure. And the second connecting member 5 is a metal plate-like structure, and the shell can be formed by stamping to form a concavo-convex bottom to form a reinforcing structure 51, and the processing method is simple.

[0022] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. An office chair, characterized in that, It includes a fixed seat frame and an armrest assembly. The fixed seat frame includes a left arm, a right arm, and a support bottom plate. The fixed seat frame is integrally U-shaped. The left arm and the right arm are tubular structures with open bottoms at the lower ends. The armrest assembly includes an armrest plate and a support arm. The armrest plate is fixed to the upper end of the support arm, and the armrest plate provides lateral support. The support arm is liftably fixed within the tubular structures of the left arm and the right arm. The left arm and the right arm of the fixed seat frame are respectively fixed to the left and right sides of the backrest frame through a first connecting member. The first connecting member includes a first connecting edge and a second connecting edge, and the first connecting edge and the second connecting edge are arranged in an L shape. The first connecting edge is fixed to the side arm of the fixed seat frame, and the second connecting edge is fixed to the side of the backrest frame. The support bottom plate of the fixed seat frame is fixed to the seat through a second connecting member. The rear end of the second connecting member is fixed to the support bottom plate, and the front end of the second connecting member is fixed to the seat.

2. The office chair according to claim 1, characterized in that, The left arm and the right arm of the fixed seat frame have curved arcs.

3. An office chair according to claim 1, characterized in that, The first connecting member and the second connecting member are plate-shaped profiles.

4. An office chair according to claim 3, characterized in that, The bottom of the support bottom plate is provided with positioning grooves, and a connecting portion is formed between the positioning grooves. The connecting portion is provided with first connecting holes. The second connecting member is at least provided with positioning side edges that are inserted and matched with the positioning grooves at the part where it is connected to the support plate at the rear end. After the positioning side edges and the positioning grooves are installed in place, the bottom of the second connecting member abuts against the connecting portion, and the second connecting holes on the second connecting member and the first connecting holes on the connecting portion are aligned in pairs.

5. An office chair according to claim 4, characterized in that, The bottom of the second connecting member is at least concavo-convexly provided at the rear end to form a strengthening structure.

6. An office chair according to claim 1, wherein, A lifting locking mechanism is provided between the fixed tube and the support arm.

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