Chair frame capable of being folded and stored

Abstract

The invention discloses a chair frame capable of being folded and stored. The chair frame comprises a bottom frame (1), a backrest rod (2) and two armrest rods (3) fixedly connected to the two ends of the backrest rod (2) respectively. Lower bent sections (4) are arranged on the two grab rails (3), and the bottom ends of the two lower bent sections (4) are hinged to the two ends of the front side of the bottom frame (1) respectively. One or more supporting rods (6) are hinged to the backrest rod (2), and a connecting groove (7) penetrating into the supporting rod (6) is formed in the bottom end face of each supporting rod (6); a screw hole (8) is formed in the position, corresponding to the lower portion of each supporting rod (6), of the rear side of the bottom frame (1), and a positioning screw (9) with a screw rod extending upwards and clamped in the corresponding connecting groove (7) in a matched mode is connected into each screw hole (8) in a threaded mode. The chair not only is convenient to use, but also has the advantages of being high in stability, attractive in appearance and high in comfort level.

Description

Technical Field

[0001] The invention relates to the technical field of seats, in particular to a foldable and storable chair frame. Background Art

[0002] Chairs are commonly used furniture in people's daily lives. They generally include backrests, cushions, armrests, stool legs and other parts, and the overall space occupied is relatively large; ZL202122106645.1 discloses a folding chair frame and a folding chair that are easy to transport. The backrest frame and two armrest frames are connected by a flexible connector so that the two armrest frames can be folded onto the backrest frame from the side of the backrest frame, so that the chair frame can be folded and stored when it is idle or transported, thereby improving space utilization. However, in this type of folding chair frame, since the two armrest frames and the backrest frame are connected by a flexible connector, the cushion constituting the seat surface must be removed before folding and storing it. When using it again, it is also necessary to pull the two armrest frames so that the multiple connection grooves at the bottom of the chair frame correspond one by one with the mounting holes on the cushion and install them to form the seat surface, which is more troublesome to use.

[0003] Therefore, the existing folding chair frame has the problem of being troublesome to use. Summary of the invention

[0004] The purpose of the present invention is to provide a chair frame that can be folded and stored. The present invention has the advantage of being convenient to use.

[0005] The technical solution of the present invention is as follows: a foldable and storable chair frame, comprising a bottom frame, a backrest rod and two armrest rods respectively fixedly connected to the two ends of the backrest rod; the two armrest rods are each provided with a downward bent section, and the bottom ends of the two downward bent sections are respectively hinged to the two end positions on the front side of the bottom frame; one or more support rods are hinged on the backrest rod, and a connecting groove extending deep into the support rod is provided on the bottom end surface of each support rod; screw holes are provided at the rear side of the bottom frame at a position corresponding to the bottom of each support rod, and a screw is threadedly connected in each screw hole to extend upward and cooperate with a positioning screw that is clamped in the connecting groove.

[0006] In the aforementioned foldable chair frame, two support rods are hinged on the backrest rod, and the two support rods are respectively hinged on the two ends of the backrest rod.

[0007] In the aforementioned foldable chair frame, the top of the screw rod in the positioning screw is arranged in a frustum shape that is larger at the bottom and smaller at the top.

[0008] In the aforementioned foldable and storable chair frame, a horizontal seat surface is fixedly connected to the bottom frame.

[0009] In the aforementioned foldable and storable chair frame, the chair surface portion is a cushion frame located within the bottom frame, and a plurality of parallel and spaced baffle rods are fixedly connected to the cushion frame, the top surfaces of the baffle rods are horizontally arranged, and both ends of the baffle rods are fixedly connected to the cushion frame; a plurality of screw connection holes are provided on both sides of the cushion frame for screws to pass through and connect the chair stool.

[0010] In the aforementioned foldable chair frame, a horizontally arranged circular tube is provided on the front side of the bottom frame, and the two ends of the circular tube are integrally connected to the bottom ends of the two downward curved sections; the connecting parts between the two ends of the circular tube and the bottom ends of the downward curved sections are arranged in an arc shape, and the two downward curved sections are arranged in an outwardly opened state.

[0011] In the aforementioned foldable chair frame, the backrest rod and the two armrest rods are both cylindrically arranged, and the backrest rod and the two armrest rods are integrally formed.

[0012] In the aforementioned foldable chair frame, the armrest rod is arranged in an arc shape at the top position corresponding to the downward curved section; the backrest rod is in an open U-shape, and the two ends of the backrest rod are inclined downward.

[0013] In the aforementioned foldable chair frame, the sides and rear side of the bottom frame, the backrest rod and the two armrest rods are all covered with an anti-slip layer, and a plurality of connecting cloth belts are connected between the sides of the bottom frame and the two armrest rods and between the rear side of the bottom frame and the backrest rod.

[0014] In the aforementioned foldable chair frame, the anti-slip layer and the connecting cloth belt are both composed of flexible straps.

[0015] Compared with the prior art, the present invention fixes two armrest rods at the two ends of the backrest rod, and the bottom ends of the upper and lower curved sections of the two armrest rods are respectively hinged at the two ends of the front side of the bottom frame; at the same time, one or more support rods with connecting grooves on the bottom are hinged on the backrest rod, and screw holes are provided at the positions corresponding to each support rod on the rear side of the bottom frame, and the screw holes are threadedly connected with screw holes with positioning screws arranged upwards; the chair frame can be converted between the storage or use state by only rotating the support rod, the backrest rod and the two armrest rods relative to the bottom frame, and controlling the direct clamping state of the positioning screws in the screw holes on the rear side of the bottom frame and the corresponding support rod connecting grooves, which is more convenient to use.

[0016] In addition, in the present invention, there are two support rods hinged on the backrest rod, and the two support rods are respectively hinged on the two ends of the backrest rod, so that the two support rods can be connected to the two ends of the rear side of the bottom frame after being erected, and the backrest rod can be supported on the bottom frame more stably.

[0017] The top of the screw rod in the positioning screw is in the shape of a truncated cone with a larger bottom and a smaller top, which allows the top of the positioning screw to easily extend into the connecting groove on the bottom surface of the corresponding support rod, making installation convenient.

[0018] The bottom frame is fixedly connected with a horizontal seat surface, and the user can sit directly on the seat surface or place a cushion on the seat surface before using it. The seat surface can be connected with a whole flat plate in the cushion frame, or it can be connected with multiple horizontally arranged and parallel spaced baffles in the cushion frame; the seat surface composed of multiple parallel spaced baffles ensures the support stability while saving materials. There are multiple screw connection holes on both sides of the cushion frame, and the screws can be connected to the chair after passing through the screw connection holes, which is convenient to operate.

[0019] A round tube located on the front side of the bottom frame is integrally connected between the bottom ends of the two downward curved sections, so that the backrest rod, the two armrest rods and the round tube can form a whole, the structure has strong stability, and is not easy to shake during use; at the same time, the arc of the top surface of the round tube is not easy to rest on the user's legs, and the comfort is better; the two downward curved sections are arranged to be opened outward, which is convenient for the user to sit between the two armrest rods, and the user's hands can be comfortably placed on the two armrest rods.

[0020] The backrest rod and the two armrest rods are integrally formed, and have high stability; the backrest rod and the two armrest rods are both cylindrical, which are not easy to hurt the user and have high comfort; at the same time, the top position of the corresponding lower curved section on the armrest rod is arc-shaped, the backrest rod is an open U-shape, and the two ends of the backrest rod are inclined downward, and the appearance is similar to that of an armchair, with beautiful appearance and high comfort.

[0021] The sides and rear side of the bottom frame, the backrest rod and the two armrest rods are covered with an anti-slip layer composed of flexible straps (the flexible straps can be cotton and linen straps, PE rattan or waterproof webbing, etc.), which provides good anti-slip and comfort for users; there are multiple connecting cloth straps composed of flexible straps connected between the sides of the bottom frame and the two armrest rods, as well as between the rear side of the bottom frame and the backrest rod, which improves the overall strength and stability while facilitating folding and storage.

[0022] Therefore, the present invention is not only convenient to use, but also has the advantages of high stability, beautiful appearance and high comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the present invention;

[0024] Figure 2 It is a structural diagram of the bottom frame;

[0025] Figure 3 is a cross-sectional view of the support rod;

[0026] Figure 4 It is a schematic diagram of the structure of the positioning screw.

[0027] The markings in the attached drawings are: 1-bottom frame, 2-backrest rod, 3-handrail rod, 4-lower curved section, 6-support rod, 7-connecting groove, 8-screw hole, 9-positioning screw, 10-cushion frame, 11-screw connection hole, 12-blocking rod, 14-round tube. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0029] Embodiment. A foldable chair frame is constructed as follows Figures 1 to 4 As shown, it includes a base frame 1, a backrest rod 2 and two handrail rods 3 fixedly connected to the two ends of the backrest rod 2; the two handrail rods 3 are provided with a downward bent section 4, and the bottom ends of the two downward bent sections 4 are respectively hinged at the two end positions on the front side of the base frame 1; one or more support rods 6 are hinged on the backrest rod 2, and the bottom end surface of each support rod 6 is provided with a connecting groove 7 that penetrates into the support rod 6; the rear side of the base frame 1 is provided with a screw hole 8 at a position corresponding to the bottom of each support rod 6, and each screw hole 8 is threadedly connected with a screw rod extending upward and cooperating with a positioning screw 9 that is clamped in the connecting groove 7.

[0030] Two support rods 6 are hinged on the backrest rod 2, and the two support rods 6 are hinged at the two ends of the backrest rod 2 respectively; the top of the screw in the positioning screw 9 is set in a truncated cone shape with a larger bottom and a smaller top; a horizontal chair surface is fixedly connected to the bottom frame 1; the chair surface is a cushion frame 10 located in the bottom frame 1, and a plurality of parallel and spaced baffle rods 12 are fixedly connected to the cushion frame 10, the top surface of the baffle rod 12 is set horizontally, and both ends of the baffle rod 12 are fixedly connected to the cushion frame 10; both sides of the cushion frame 10 are provided with a plurality of screw connection holes 11 for screws to pass through and connect the chair stool; a horizontal and transversely arranged round tube 14 is set on the front side of the bottom frame 1, and the two ends of the round tube 14 are connected to the two The bottom end of the lower curved section 4 is connected integrally; the connection parts between the two ends of the circular tube 14 and the bottom end of the lower curved section 4 are arranged in an arc shape, and the two lower curved sections 4 are arranged in an outwardly flared state; the backrest rod 2 and the two handrail rods 3 are arranged in a cylindrical shape, and the backrest rod 2 and the two handrail rods 3 are integrally formed; the position corresponding to the top of the lower curved section 4 on the handrail rod 3 is arranged in an arc shape; the backrest rod 2 is an open U-shape, and the two ends of the backrest rod 2 are inclined downward; the two sides and rear side of the bottom frame 1, the backrest rod 2 and the two handrail rods 3 are covered with an anti-slip layer, and a plurality of connecting cloth belts are connected between the two sides of the bottom frame 1 and the two handrail rods 3, and between the rear side of the bottom frame 5 and the backrest rod 2; the anti-slip layer and the connecting cloth belt are both composed of flexible straps.

[0031] Working principle: when it is needed, move the backrest rod 2 upward. At this time, the two armrest rods 3 integrally connected to the backrest rod 2 are driven synchronously, and the bottom ends of the upper and lower bent sections 4 of the two armrest rods 3 will rotate upward relative to the two ends of the front side of the bottom frame 1; then the support rods 6 at both ends of the backrest rod 2 are rotated downward to a vertical state, and the connecting groove 7 at the bottom end of the support rod 6 is aligned with the screw hole 8 on the rear side of the bottom frame 1, and then the screw rod of the positioning screw 9 is extended upward from the screw hole 8 and fits into the connecting groove 7 (the length of the screw rod of the positioning screw 9 inserted into the connecting groove 7 is about 5 cm, and the stability is better), so that the support rod 6 is fixed on the bottom frame 1 in an upright state, and the backrest rod 2 and the two armrest rods 3 are positioned and fixed on the bottom frame to form a chair frame.

[0032] When it is necessary to fold and store, it is only necessary to screw the positioning screw 9 to move the positioning screw 9 downward relative to the screw hole 8 and separate the screw rod on the positioning screw 9 from the connecting groove 7 on the support rod 6. Then the support rod can be rotated to a horizontal position, and the two upright handrail rods 3 and the backrest rod 2 can be rotated downward relative to the two ends of the front side of the bottom frame 1 and close to the bottom frame 1.

[0033] After placing the stool under the cushion frame 10, multiple screws are passed through the multiple screw connection holes 11 on both sides of the cushion frame 10 to fix the stool under the cushion frame 10, and the seat can be installed. The user can directly sit on the multiple stop bars 12 in the cushion frame 10 or place the cushion on the cushion frame 10 and then sit on the cushion.

[0034] The backrest rod 2, the two handrail rods 3 and the round tube 14 are integrally arranged, and the overall structure has high stability; the round tube 14 is located on the front side of the bottom frame 1, and its curved outer side surface is not easy to rest on the user's legs, and the comfort is good; the two handrail rods 3 are arranged to be open outward relative to the two ends of the round tube 14, which is more convenient for the user to sit between the two handrail rods 3, and the user's hands can be placed on the handrail rods 3 more comfortably; the appearance of the backrest rod 2 and the two handrail rods 3 is similar to the appearance of the corresponding positions on the round chair, and the shape is beautiful and comfortable to use. An anti-slip layer is formed by wrapping the flexible strap around the two sides and the back of the base frame 1, the backrest rod 2 and the two handrail rods 3; and during the wrapping process, the flexible strap is alternately wrapped between the top of the two handrail rods 3 and the two sides of the base frame 1, and alternately wrapped between the backrest rod 2 and the back of the base frame 1, thereby forming a connecting cloth tape (i.e., the flexible strap is wrapped around the top of the handrail rod 3 for one or more turns and then led downward to the base frame 1, and wrapped around the base frame 1 for one turn and then led upward to the top of the handrail rod 3, and continues to be wrapped at a side position where the flexible strap has been wrapped, and then the flexible strap is led to the base frame 1, and then continues to be wrapped at a side position where the flexible strap has been wrapped).

Claims

1. A foldable chair frame, comprising a bottom frame (1), a backrest rod (2), and two armrest rods (3) respectively fixedly connected to both ends of the backrest rod (2); characterized in that: The two handrail rods (3) are each provided with a downwardly bent section (4), and the bottom ends of the two downwardly bent sections (4) are respectively hinged to the two end positions of the front side of the bottom frame (1); one or more support rods (6) are hinged to the backrest rod (2), and a connecting groove (7) that penetrates into the support rod (6) is provided on the bottom end surface of each support rod (6); a screw hole (8) is provided at a position corresponding to the bottom of each support rod (6) on the rear side of the bottom frame (1), and a screw rod is threadedly connected in each screw hole (8) and extends upward and cooperates with a positioning screw (9) that is clamped in the connecting groove (7).

2. The foldable chair frame according to claim 1, characterized in that: Two support rods (6) are hinged on the backrest rod (2), and the two support rods (6) are respectively hinged on the two ends of the backrest rod (2).

3. The foldable chair frame according to claim 1, characterized in that: The top of the screw rod in the positioning screw (9) is arranged in a frustum shape with a larger bottom and a smaller top.

4. The foldable chair frame according to claim 1, characterized in that: A horizontal seat surface is fixedly connected to the bottom frame (1).

5. The foldable chair frame according to claim 4, characterized in that: The seat surface is a cushion frame (10) located inside the bottom frame (1), and a plurality of parallel and spaced baffles (12) are fixedly connected inside the cushion frame (10), the top surface of the baffles (12) is arranged horizontally, and both ends of the baffles (12) are fixedly connected to the cushion frame (10); and a plurality of screw connection holes (11) for screws to pass through and connect to the chair are provided on both sides of the cushion frame (10).

6. The foldable chair frame according to claim 1, characterized in that: A circular tube (14) is arranged horizontally and transversely on the front side of the bottom frame (1), and the two ends of the circular tube (14) are integrally connected to the bottom ends of the two downward curved sections (4); the connecting parts between the two ends of the circular tube (14) and the bottom ends of the downward curved sections (4) are arranged in an arc shape, and the two downward curved sections (4) are arranged in an outwardly open shape.

7. The foldable chair frame according to claim 1, characterized in that: The backrest rod (2) and the two handrail rods (3) are both arranged in a cylindrical shape, and the backrest rod (2) and the two handrail rods (3) are integrally formed.

8. The foldable chair frame according to claim 1, characterized in that: The top position of the corresponding lower curved section (4) on the handrail rod (3) is arranged in an arc shape; the backrest rod (2) is in an open U-shape, and the two ends of the backrest rod (2) are inclined downward.

9. The foldable chair frame according to claim 1, characterized in that: The sides and rear side of the bottom frame (1), the backrest rod (2) and the two handrail rods (3) are all covered with an anti-slip layer, and a plurality of connecting cloth belts are connected between the sides of the bottom frame (1) and the two handrail rods (3) and between the rear side of the bottom frame (5) and the backrest rod (2).

10. The foldable chair frame according to claim 9, characterized in that: The anti-slip layer and the connecting cloth belt are both composed of flexible binding belts.

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