Foldable plastic chair

Abstract

The utility model provides a foldable plastic chair which comprises two front chair legs, a chair back is jointly installed between the tops of the opposite sides of the two front chair legs, and rear chair legs are rotationally connected to the opposite sides of the two front chair legs and located below the chair back through pin shafts. A seat plate is rotatably connected between the middle portions of the opposite sides of the two front chair legs through pin shafts, sliding blocks are installed on the two sides of the seat plate, and sliding grooves are formed in the opposite sides of the two rear chair legs. Due to the limiting effect of the limiting rods, the limiting area is large, stress concentration is reduced, the rear side of the top of the seat plate cannot be excessively lifted, the connecting positions of the seat plate and the rear chair legs cannot deform, the phenomenon that the plastic chair is stuck in the folding process is avoided, and the service life of the folding plastic chair is effectively prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to a foldable plastic chair and belongs to the field of foldable plastic chair equipment. BACKGROUND

[0002] The foldable plastic chair is a kind of furniture that is light and easy to store, commonly used in outdoor activities, family gatherings, camping and other occasions, usually made of plastic, light in weight, easy to carry and can be easily folded to save storage space.

[0003] In the prior art, the two sides of the seat plate of the plastic chair are connected with the two rear chair legs through sliding blocks, when the plastic chair is unfolded for use, the front side of the seat plate is stressed, the rear side is raised and pulls the sliding block upward, since the connecting part of the sliding block and the plastic chair is only connected through a shaft rod, long-term reverse stress can easily cause the shaft rod to bend and deform, thus causing the plastic chair to be easily stuck during folding and storage, reducing the service life of the foldable plastic chair.

[0004] Therefore, the utility model provides a foldable plastic chair to solve the above problems. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies in the prior art, the utility model aims to provide a foldable plastic chair to solve the problem that the pin shaft of the sliding connection part of the foldable plastic chair is easily bent and deformed due to excessive stress, reducing the service life of the foldable plastic chair.

[0006] To achieve the above purpose, the utility model is implemented by the following technical scheme: a foldable plastic chair, comprising two front chair legs, a chair back is commonly installed between the top of the opposite sides of the two front chair legs, a rear chair leg is rotatably connected to the lower part of the opposite sides of the two front chair legs through a pin shaft, a seat plate is rotatably connected between the middle part of the opposite sides of the two front chair legs through a pin shaft, a sliding block is installed on both sides of the seat plate, a sliding groove is formed on the opposite sides of the two rear chair legs, the opposite sides of the two rear chair legs are slidably connected with the sliding grooves on the opposite sides of the two rear chair legs through the sliding blocks on both sides of the seat plate, and a limiting rod is fixedly connected between the top of the seat plate and the opposite sides of the two rear chair legs.

[0007] Further, a rear cross rod is commonly installed between the bottom of the opposite sides of the two rear chair legs, and a front cross rod is commonly installed between the bottom of the opposite sides of the two front chair legs.

[0008] Further, the seat plate comprises a seat frame, pin shafts are mounted on both sides of the seat frame, the seat frame is rotationally connected to the opposite sides of the two front chair legs below the limiting rods, the rear ends of the seat frame on both sides are slidably connected to the sliding grooves on the opposite sides of the two rear chair legs through the sliding blocks, a load-bearing shaft is rotationally connected between the two sides of the seat frame through a bearing, a hollow plate is fixedly mounted on the outside of the load-bearing shaft, a cushion is fixedly mounted on the top of the hollow plate, rattan net is embedded in the bottom of the hollow plate, two recesses are formed in the two sides of the seat frame, and a fastening bolt is embedded in each recess.

[0009] Further, the end of the fastening bolt is fixedly mounted with a rotating block, and the top of the seat frame is in contact with the bottom of the limiting rod.

[0010] Further, the end of the rotating block extends to the outside of the recess, and the fastening bolt is threadedly connected with the seat frame.

[0011] Further, the fastening bolt is threadedly connected with the hollow plate, and the top and the bottom of the seat frame are both open.

[0012] The utility model discloses the beneficial effects of:

[0013] Through the force on the top front side of the seat plate, the top rear side of the seat plate will be raised, and due to the limiting effect of the limiting rod, the limiting area is large, the stress concentration is reduced, the top rear side of the seat plate will not be excessively lifted, the connection between the seat plate and the rear chair leg will not be deformed, the phenomenon of jamming during folding of the plastic chair is avoided, and the service life of the folding plastic chair is effectively prolonged.

[0014] By rotating the fastening bolt through the rotating block, the four fastening bolts can be detached from between the seat frame and the hollow plate, after detachment, the hollow plate can rotate in the seat frame, when the hollow plate rotates 180°, the threaded holes on the hollow plate can be aligned with the threaded holes on the seat frame, then the hollow plate and the seat frame can be fixedly connected again through the fastening bolt, the fixation of the seat frame is completed, the plastic chair cushion can be replaced according to different requirements of seasons without disassembly, the structure is simple, the operation is convenient, and the use comfort of the folding plastic chair is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Other features, objects and advantages of the utility model will become more apparent through reading the following detailed description of the non-limiting embodiments with reference to the accompanying drawings:

[0016] Figure 1 It is a perspective view of the utility model of a foldable plastic chair;

[0017] Figure 2It is a rear view of the foldable plastic chair of the utility model.

[0018] Figure 3 It is a front view of the foldable plastic chair of the utility model.

[0019] Figure 4 It is Figure 3 It is the main sectional view of the seat plate.

[0020] In the figure: 1, front chair leg; 2, chair back; 3, rear chair leg; 4, rear cross bar; 5, front cross bar; 6, limiting rod; 7, seat plate; 71, seat frame; 72, bearing shaft; 73, hollow plate; 74, rattan net; 75, cushion; 76, groove; 77, fastening bolt; 78, rotating block. Specific implementation

[0021] In order to make the technical means, creative features, purposes and effects of the utility model easy to understand, the utility model is further described below in combination with specific implementation modes.

[0022] Please refer to Figures 1-4 The utility model provides a technical scheme: a foldable plastic chair, including two front chair legs 1, the top between the opposite sides of two front chair legs 1 is jointly installed with chair back 2, the opposite side of two front chair legs 1 and below chair back 2 are all connected with rear chair leg 3 through pin shaft rotation, the middle part between the opposite sides of two front chair legs 1 is all connected with seat plate 7 through pin shaft rotation, both sides of seat plate 7 are all installed with sliding block, the opposite side of two rear chair legs 3 is all set up with sliding slot, both sides of seat plate 7 are all connected with the sliding slot on the opposite side of two rear chair legs 3 through sliding block respectively, the opposite side between two rear chair legs 3 and the top of seat plate 7 are fixedly connected with limiting rod 6, limiting rod 6 has the limiting effect to seat plate 7, when the plastic chair is unfolded and used, the top front side of seat plate 7 is stressed, so that the top rear side of seat plate 7 is lifted, and because of the limiting effect of limiting rod 6, the limiting area is large, stress concentration is reduced, so that the top rear side of seat plate 7 is not excessively lifted, the connecting place of seat plate 7 and rear chair leg 3 is not deformed, the bottom between the opposite sides of two rear chair legs 3 is jointly installed with rear cross bar 4, the bottom between the opposite sides of two front chair legs 1 is jointly installed with front cross bar 5, rear cross bar 4 can increase the stability between two rear chair legs 3, and front cross bar 5 can increase the stability between two front chair legs 1.

[0023] Please refer to the drawings, the seat plate 7 comprises a seat frame 71, the seat frame 71 is rotatably connected to the opposite side between the two front chair legs 1 below the limiting rod 6 by installing the pin shaft on both sides of the seat frame 71, the rear end of both sides of the seat frame 71 is slidably connected to the sliding groove on the opposite side of the two rear chair legs 3 through the sliding block, the load-bearing shaft 72 is rotatably connected between both sides of the seat frame 71 through the bearing, the hollow plate 73 is fixedly installed on the outside of the load-bearing shaft 72, the seat cushion 75 is fixedly installed on the top of the hollow plate 73, the rattan net 74 is fixedly embedded on the bottom of the hollow plate 73, the inside of the seat cushion 75 is made of sponge, which is soft and suitable for cold seasons, the rattan net 74 is hollow and has strong air permeability, which is suitable for hot seasons, two recesses 76 are formed on both sides of the seat frame 71, the fastening bolt 77 is embedded in each recess 76, one end of the fastening bolt 77 penetrates the seat frame 71 and the hollow plate 73 in sequence and extends into the inside of the hollow plate 73, there is a gap between the seat frame 71 and the hollow plate 73, which facilitates the rotation of the hollow plate 73 by 180° in the inside of the seat frame 71 through the load-bearing shaft 72, the rotating block 78 is fixedly installed on one end of the fastening bolt 77, and the top of the seat frame 71 is in contact with the bottom of the limiting rod 6.

[0024] Please refer to Figures 2-4 , one end of the rotating block 78 extends to the outside of the recess 76, the fastening bolt 77 is threadedly connected with the seat frame 71, the gap between the front chair leg 1, the rear chair leg 3 and the seat frame 71 is used for the movement of the rotating block 78, the fastening bolt 77 is conveniently rotated through the rotating block 78, when the fastening bolt 77 is rotated and detached, the hollow plate 73 can rotate in the inside of the seat frame 71, the threaded holes for threadedly connecting with the fastening bolt 77 are formed in the seat frame 71 and the hollow plate 73, the fastening bolt 77 is threadedly connected with the hollow plate 73, and the top and the bottom of the seat frame 71 are open.

[0025] Specific embodiments: when the plastic chair is unfolded and used, the top front side of the seat plate 7 is stressed, so that the top rear side of the seat plate 7 is lifted up, and because of the limiting effect of the limiting rod 6, the limiting area is large, the stress concentration is reduced, so that the top rear side of the seat plate 7 is not excessively lifted up, and the connection between the seat plate 7 and the rear chair leg 3 is not deformed, avoiding the phenomenon of jamming in the folding process of the plastic chair, effectively prolonging the service life of the folding plastic chair, the rear cross rod 4 is jointly installed between the bottoms of the opposite sides of the two rear chair legs 3, and the front cross rod 5 is jointly installed between the bottoms of the opposite sides of the two front chair legs 1, the rear cross rod 4 can increase the stability between the two rear chair legs 3, and the front cross rod 5 can increase the stability between the two front chair legs 1.

[0026] The inner part of the cushion 75 is made of sponge, which is soft and suitable for cold seasons, and the rattan net 74 is hollow, which is breathable and suitable for hot seasons. When it is necessary to change the positions of the cushion 75 and the rattan net 74 according to the temperature, the four fastening bolts 77 are detached from the seat frame 71 and the hollow plate 73 by rotating the fastening bolt 77 quickly through the rotating block 78. After the detachment, the hollow plate 73 can rotate in the interior of the seat frame 71. When the hollow plate 73 rotates 180°, the threaded holes on the hollow plate 73 can be aligned with the threaded holes on the seat frame 71, and then the hollow plate 73 and the seat frame 71 can be fixedly connected again through the fastening bolts 77, the fixation of the seat frame 71 is completed, the plastic chair cushion can be changed according to the different needs of different seasons, and it is not necessary to disassemble, the structure is simple, the operation is convenient, and the use comfort of the folding plastic chair is improved.

[0027] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. A foldable plastic chair comprising two front chair legs (1), characterized in that: The chair back (2) is installed between the top of the opposite sides of the two front chair legs (1), the rear chair leg (3) is rotatably connected to the opposite side of the two front chair legs (1) below the chair back (2), the slide block (7) is rotatably connected between the middle of the opposite sides of the two front chair legs (1), the slide blocks are installed on the two sides of the slide block (7), the slide grooves are arranged on the opposite sides of the two rear chair legs (3), the slide blocks are slidably connected with the slide grooves on the opposite sides of the two rear chair legs (3), and the limiting rod (6) is fixedly connected between the opposite sides of the two rear chair legs (3) above the slide block (7).

2. A foldable plastic chair as claimed in claim 1, wherein: The rear cross rod (4) is installed between the bottom of the opposite sides of the two rear chair legs (3), and the front cross rod (5) is installed between the bottom of the opposite sides of the two front chair legs (1).

3. A foldable plastic chair as claimed in claim 1, wherein: The slide block (7) comprises the seat frame (71), the slide blocks are installed on the two sides of the seat frame (71), the seat frame (71) is rotatably connected between the opposite sides of the two front chair legs (1) below the limiting rod (6), the slide blocks on the two sides of the seat frame (71) are slidably connected with the slide grooves on the opposite sides of the two rear chair legs (3), the load-bearing shaft (72) is rotatably connected between the two sides of the seat frame (71) through the bearing, the hollow plate (73) is fixedly arranged on the outer portion of the load-bearing shaft (72), the cushion (75) is fixedly installed on the top of the hollow plate (73), the rattan net (74) is fixedly embedded on the bottom of the hollow plate (73), the two recesses (76) are arranged on the two sides of the seat frame (71), the fastening bolt (77) is embedded in each recess (76), and one end of the fastening bolt (77) penetrates the seat frame (71) and the hollow plate (73) in sequence and extends into the hollow plate (73).

4. A foldable plastic chair as claimed in claim 3, wherein: One end of the fastening bolt (77) is fixedly installed with the rotating block (78), and the top of the seat frame (71) is in contact with the bottom of the limiting rod (6).

5. A foldable plastic chair as claimed in claim 4, wherein: One end of the rotating block (78) extends to the outside of the recess (76), and the fastening bolt (77) is threadedly connected with the seat frame (71).

6. A foldable plastic chair as claimed in claim 3, wherein: The fastening bolt (77) is threadedly connected with the hollow plate (73), and the top and the bottom of the seat frame (71) are both in an open shape. The fastening bolt (77) is threadedly connected with the hollow plate (73), and the top and the bottom of the seat frame (71) are both in an open shape.

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