Seat backrest frame

Abstract

The utility model provides a seat backrest frame which comprises a backrest part, and a seat cushion connecting part horizontally extending towards one side is arranged at the lower end of the backrest part in an arc transition mode. The front surface of the backrest part is provided with a plug-in type positioning support connecting structure and a backrest screw connecting hole; a seat cushion connecting hole and a base connecting hole which are vertically through are formed in the seat cushion connecting part, and a positioning inserting groove is formed in the bottom of the seat cushion connecting part. Compared with the prior art, the plug-in type positioning and supporting connecting structure is arranged on the front face of the backrest part, the positioning and supporting effects can be conveniently achieved when the backrest part and the backrest cushion are assembled, screws are screwed into the backrest screw connecting holes to be connected with connecting pieces on the backrest cushion in a fastened mode, and the situation that the backrest cushion inclines and collapses when the screws are screwed into the backrest screw connecting holes is avoided; the positioning slot is formed in the bottom of the seat cushion connecting part, so that the seat cushion connecting hole and the base connecting hole can be quickly aligned to the connecting hole position on the seat base, the assembly is convenient, and the assembly difficulty is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to chair technology field, concretely relates to a seat back frame. BACKGROUND

[0002] It is known that in common chair products such as office chair, backrest, which supports the back, can be often seen. The existing backrest is usually made of single cushion or elastic woven material, and forms corresponding curved surface shape according to ergonomics.

[0003] In office chair, in order to save shipping cost, the seat back frame, backrest cushion and seat base of seat furniture are shipped in disassembled state, and the seat back frame is the key connecting part of the backrest cushion and seat base, and in the case of frequently changing work site, the seat may also need to be disassembled and reassembled for many times, and the backrest cushion and seat base in the prior art cannot be quickly calibrated screw hole for positioning when being assembled and connected with the seat back frame, and one person is needed to help support to complete screw connection and fixation, resulting in that the assembly difficulty of the seat back frame with the backrest cushion and seat base is large, and the assembly is inconvenient. SUMMARY

[0004] The utility model discloses a seat back frame, which aims to solve the problem of large assembly difficulty of the seat back frame with the backrest cushion and seat base in the prior art.

[0005] In order to achieve the above purpose, the utility model provides a seat back frame, which is characterized by comprising:

[0006] The lower end of the backrest part is provided with a seat cushion connecting part extending horizontally to one side through a circular arc transition;

[0007] The front of the backrest part is provided with a plug-in positioning support connecting structure and a backrest screw connecting hole, the positioning support connecting structure comprises two groups of first plug-in columns and second plug-in columns symmetrically arranged on the front of the backrest part, and the centers of the first plug-in columns and second plug-in columns are provided with plug-in holes;

[0008] The seat cushion connecting part is provided with a vertical seat cushion connecting hole and a base connecting hole, and the bottom of the seat cushion connecting part is provided with a positioning slot.

[0009] Further, the length of the first plug-in column is greater than the length of the second plug-in column.

[0010] Further, the diameter of the first plug-in column is greater than or equal to the diameter of the second plug-in column.

[0011] Further, the diameter of the plug-in hole of the first plug-in column is greater than or equal to the diameter of the plug-in hole of the second plug-in column.

[0012] Further, the four sides of the positioning support connecting structure are provided with trapezoidal or rectangular reinforcing rib structures.

[0013] Further, the seat cushion connecting hole is an elliptical long slot, and the base connecting hole is a circular hole.

[0014] Further, the backrest part comprises a headrest part and a waist and backrest part, and the width of the headrest part is greater than the width of the waist and backrest part.

[0015] Further, the headrest part and the waist and backrest part are both provided with transverse reinforcing ribs and longitudinal reinforcing ribs, and the waist and backrest part is provided with X-shaped reinforcing ribs and zigzag reinforcing ribs.

[0016] Further, the waist and backrest part is provided with weight-reducing and air-permeating holes.

[0017] Compared with the prior art, the seat backrest frame provided by the utility model is provided with a plug-in positioning support connecting structure on the front surface of the backrest part, which facilitates positioning and support when the backrest cushion is assembled, and then a screw is screwed into the backrest screw connecting hole and connected with the connecting piece on the backrest cushion, so that the backrest cushion is prevented from tilting and collapsing when the screw is screwed in, and the positioning slot is arranged at the bottom of the seat cushion connecting part, so that the seat cushion connecting hole and the base connecting hole can be quickly aligned with the connecting hole position on the seat base, and the assembly is convenient and the assembly difficulty is effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Fig. 1 is a structural schematic view of the utility model;

[0019] Figure 2 Fig. 2 is another structural schematic view of the utility model.

[0020] MARKS

[0021] 10-backrest part; 101-headrest part; 102-waist and backrest part; 103-weight-reducing and air-permeating hole; 11-first plug-in column; 12-second plug-in column; 13-plug-in hole; 14-backrest screw connecting hole; 15-reinforcing rib structure; 16-transverse reinforcing rib; 17-longitudinal reinforcing rib; 18-X-shaped reinforcing rib; 19-zigzag reinforcing rib;

[0022] 20-seat cushion connecting part; 21-seat cushion connecting hole; 22-base connecting hole; 23-positioning slot. DETAILED DESCRIPTION

[0023] The utility model will be described in detail in combination with specific embodiments.

[0024] In the utility model, when the orientation word appears, for the orientation word, it is for the convenience of narrating the utility model and simplifying the description, and is not indicative or suggestive of the device or element indicated must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific protection scope of the utility model.

[0025] In the utility model, except for another explicit provision and limitation, when the terms such as '' set up in '' '' connect '' '' are connected '' appear, these terms should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrally connected, can be mechanically connected, can be directly connected, or connected through an intermediate medium, and can be connected in the interior of two elements. For those skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0026] As shown in Figure 1 and Figure 2 As shown in a seat back frame, including backrest part 10 and seat cushion connecting part 20, the lower end of backrest part 10 is circularly arc transitioned and provided with seat cushion connecting part 20 extending horizontally to one side, the front of backrest part 10 is provided with plug-in type positioning support connecting structure and backrest screw connecting hole 14, seat cushion connecting part 20 is provided with vertically penetrating seat cushion connecting hole 21 and base connecting hole 22, and the bottom of seat cushion connecting part 20 is provided with positioning slot 23.

[0027] Among them, the backrest part 10 and the seat cushion connecting part 20 are integrally formed structure, which is convenient for integrated molding and batch production. The positioning support connecting structure is used for cooperating with the positioning column on the back of the back cushion, the backrest screw connecting hole 14 penetrates the backrest part 10, is used for cooperating with the threaded hole on the back cushion and is fastened and connected by driving a screw. The positioning slot 23 is used for cooperating with the positioning plug on the seat base, so that the seat cushion connecting hole 21 and the base connecting hole 22 are quickly aligned with the connecting hole position on the seat base, and assembly is facilitated.

[0028] In the embodiment, the positioning support connecting structure includes two groups of first plug-in columns 11 and second plug-in columns 12 symmetrically arranged on the front of the backrest part 10, the centers of the first plug-in columns 11 and the second plug-in columns 12 are provided with plug-in holes 13, which are used for cooperating with the positioning column on the back of the back cushion, and belong to the male-female end cooperating plug-in structure.

[0029] In the embodiment, the length of the first plug-in column 11 is greater than the length of the second plug-in column 12, that is, the first plug-in column 11 can play a role of positioning support when assembling with the back cushion, and the use of materials can be reduced in the structural design.

[0030] Among them, the diameter of the first plug-in column 11 is greater than or equal to the diameter of the second plug-in column 12, and the diameter of the plug-in hole 13 of the first plug-in column 11 is greater than or equal to the diameter of the plug-in hole 13 of the second plug-in column 12.

[0031] In the embodiment, the four sides of the positioning support connecting structure are provided with trapezoidal or rectangular reinforcing rib structures 15.

[0032] In the embodiment, the seat cushion connecting hole 21 is an elliptical long hole, which plays a regulating role in connecting the seat cushion, and the base connecting hole 22 is a circular hole, which is used to quickly align the connecting hole position on the seat base with the positioning slot 23.

[0033] In the embodiment, the backrest part 10 includes a headrest part 101 and a waist and backrest part 102, the width of the headrest part 101 is greater than the width of the waist and backrest part 102, the headrest part 101 and the waist and backrest part 102 are both provided with transverse reinforcing ribs 16 and longitudinal reinforcing ribs 17, the waist and backrest part 102 is provided with X-shaped reinforcing ribs 18 and fold line type reinforcing ribs 19, which improves the overall structural strength of the headrest part 101 and the waist and backrest part 102, and the support strength is high.

[0034] In the embodiment, the weight-reducing and air-permeable holes 103 are provided on the waist and backrest part 102, which facilitates the ventilation and air permeation of the assembled backrest cushion.

[0035] Compared with the prior art, the seat backrest frame provided by the utility model is provided with a plug-in type positioning support connecting structure on the front surface of the backrest part 10, which facilitates the positioning and supporting when assembled with the backrest cushion, the backrest screw connecting hole 14 is tightened with the connecting piece on the backrest cushion to avoid the collapse of the backrest cushion when the screw is tightened, the positioning slot 23 is provided on the bottom of the seat cushion connecting part 20, which facilitates the quick alignment of the seat cushion connecting hole 21 and the base connecting hole 22 with the connecting hole position on the seat base, and the assembly is convenient and the assembly difficulty is effectively reduced.

[0036] In the case of no conflict, the above embodiments and features in the embodiments can be combined with each other.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, and not to limit the protection scope of the utility model, although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the utility model can be modified or replaced equivalently without departing from the essence and scope of the technical solutions of the utility model.

Claims

1. A seat back frame, characterized by, Comprise: The backrest part, the lower end of the backrest part is circularly transitioned to be provided with a seat cushion connecting part extending horizontally to one side; The front surface of the backrest part is provided with a plug-in type positioning support connecting structure and a backrest screw connecting hole, the positioning support connecting structure comprises two groups of first plug-in columns and second plug-in columns symmetrically arranged on the front surface of the backrest part, the centers of the first plug-in columns and the second plug-in columns are provided with plug-in holes; The seat cushion connecting part is provided with a vertical seat cushion connecting hole and a base connecting hole, and the bottom of the seat cushion connecting part is provided with a positioning slot.

2. A seat back frame according to claim 1, wherein The length of the first plug-in column is greater than the length of the second plug-in column.

3. A seat back frame according to claim 2, wherein The diameter of the first plug-in column is greater than or equal to the diameter of the second plug-in column.

4. A seat back frame according to claim 3, wherein The diameter of the plug-in hole of the first plug-in column is greater than or equal to the diameter of the plug-in hole of the second plug-in column.

5. The seat back frame of Claim 1, wherein, The positioning support connecting structure is provided with a trapezoidal or rectangular reinforcing rib structure around.

6. The seat back frame of Claim 1, wherein, The seat cushion connecting hole is an elliptical long slot hole, and the base connecting hole is a circular hole.

7. The seat back frame of Claim 1, wherein The backrest part comprises a headrest part and a waist backrest part, and the width of the headrest part is greater than the width of the waist backrest part.

8. A seat back frame according to claim 7, wherein The headrest part and the waist backrest part are both provided with transverse reinforcing ribs and longitudinal reinforcing ribs, and the waist backrest part is provided with X-shaped reinforcing ribs and fold line type reinforcing ribs.

9. A seat back frame according to claim 7 wherein, The waist backrest part is provided with a weight-reducing and air-permeable hole.

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