Integrally-formed high-strength plastic chair

Abstract

Chair legs comprise a front chair leg and a rear chair leg, the front chair leg comprises two symmetrical first supporting columns, and each first supporting column spirally penetrates through a first connecting piece, a second connecting piece and the other opposite first connecting piece. The chair rear leg comprises two symmetrical second supporting columns, the second supporting columns spirally penetrate through a third connecting piece to be spirally connected with the bottom of the chair seat, and one sides of the two first connecting pieces are fixedly connected with the third connecting piece through first connecting rods; three isosceles triangles with different sizes are formed among the first connecting rod, the second connecting rod and the first supporting column, so that the supporting strength of the rear legs of the chair is improved, and meanwhile, the chair seat and the chair back can be mounted at proper positions according to the sitting posture habit of a customer, so that the sitting posture of the customer can be adjusted, and the sitting posture of the customer can be adjusted. The service life of the chair is prevented from being shortened due to the sitting posture problem.

Description

Technical Field

[0001] This utility model relates to the field of furniture technology, and in particular to a one-piece molded high-strength plastic chair. Background Technology

[0002] Plastic chairs are furniture made through processes such as injection molding and blow molding, and their core material is polymer (such as polypropylene, polyethylene, etc.).

[0003] A search revealed Chinese patent CN216569132U, which discloses a chair seat, a chair back, and chair legs disposed on the bottom surface of the chair seat. Both the chair seat and the chair back are injection molded from a mixture of color masterbatch, polyethylene, polypropylene, plastic particles, long glass fiber, recycled particles, high-gloss masterbatch, and talc filler masterbatch. The chair legs include a mounting frame, a front support leg disposed on the bottom of the mounting frame, and a rear support leg disposed on the bottom of the mounting frame. The mounting frame has several mounting holes. A rotating groove is provided at the bottom of the chair seat corresponding to the mounting holes. A connector is rotatably connected to the rotating groove. A fixing hole is provided on the side wall of the connector near the mounting hole. A fixing screw is threadedly connected to the corresponding fixing hole and the mounting hole. A positioning groove is provided in the rotating groove. A positioning block is provided on the connector and rotatably connected to the positioning groove. This design has the advantage of connecting and fixing the chair seat and chair legs through the connector, avoiding damage to the chair seat caused by the screws that continue to be screwed in.

[0004] However, the above technical solution cannot adjust the support structure according to the customer's sitting posture. Since customers have different sitting postures, some like to lean forward and some like to lean back, which will cause great damage to the front or back legs of the chair and seriously affect the service life of the plastic chair.

[0005] Therefore, the present invention proposes a one-piece molded high-strength plastic chair. Utility Model Content

[0006] Technical problem to be solved: The support structure cannot be adjusted according to the customer's sitting posture. Since customers have different sitting postures, some like to lean forward and some like to lean back, this will cause great damage to the front or back legs of the chair and seriously affect the service life of the plastic chair.

[0007] To achieve the above objectives, this utility model proposes an integrally molded high-strength plastic chair, including a seat, a backrest integrally molded with the seat, and legs disposed on the bottom surface of the seat. The chair legs are characterized by comprising front legs and rear legs. The front legs include two symmetrical first support columns, which spirally pass through a first connector, a second connector, and another opposite first connector from bottom to top, and are spirally connected to the bottom of the seat. The rear legs include two symmetrical second support columns, which spirally pass through a third connector and are spirally connected to the bottom of the seat. One side of each of the two first connectors is fixedly connected to one side of the third connector via a first connecting rod, and one side of each second connector is spirally connected to the third connector via a second connecting rod.

[0008] In one example, the first connector includes a first bearing, a connecting sleeve fixedly mounted on the top of the inner layer of the first bearing, the inner wall of the connecting sleeve having a spiral pattern, a first support column passing through the inner layer of the first bearing and spirally passing through the connecting sleeve, and the first connecting column fixedly mounted on one side of the outer layer of the first bearing. The third connector includes a third bearing, a connecting sleeve fixedly mounted on the top of the inner layer of the third bearing, the inner wall of the connecting sleeve having a spiral pattern, a second support column passing through the inner layer of the third bearing and spirally passing through the connecting sleeve, and the third connecting column fixedly mounted on the outer layer of the third bearing. The top of the first connecting column is fixedly connected to one end of a first connecting rod, the other end of the first connecting rod is fixedly connected to the bottom of the third connecting column, and the bottom of another first connecting column is fixedly connected to the top of the third connecting column via a first connecting rod.

[0009] In one example, the second connector includes a second bearing, a connecting sleeve fixedly mounted on the top of the inner layer of the second bearing, the inner wall of the connecting sleeve having a spiral pattern, a first support column passing through the inner layer of the second bearing and spirally passing through the connecting sleeve, one end of a second connecting rod being spirally connected to the outer wall of the second bearing, and the other end of the second connecting rod being spirally connected to a third connecting column.

[0010] In one example, three triangles of different sizes are formed between the two first connecting rods and the second connecting rod, and the triangles are isosceles triangles.

[0011] In one example, nylon anti-loosening pads are added at the connection between the first support column, the second support column and the bottom of the seat.

[0012] In one example, armrests are symmetrically installed on the top of the chair seat.

[0013] In one example, multiple ventilation holes are arranged in an orderly manner on the chair back.

[0014] The one-piece molded high-strength plastic chair proposed in this utility model has the following beneficial effects:

[0015] 1. In this utility model, three triangles of different sizes are formed between the first connecting rod, the second connecting rod, and the first support column. These triangles are isosceles triangles, which improves the support strength for the rear legs of the chair, thereby reducing the deformation force of the rear legs, extending the service life of the rear legs, and improving the service life of the chair.

[0016] 2. In this utility model, the seat and backrest can be installed in a suitable position according to the different sitting habits of customers, thereby avoiding the reduction of the service life of plastic chairs due to sitting posture problems. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the chair leg structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the first connector, the second connector, and the third connector of this utility model;

[0020] Figure 4 This is a schematic diagram of the overall structure of the chair seat and backrest of this utility model, which are arranged in opposite directions.

[0021] The attached figures are labeled as follows:

[0022] 1. Seat; 2. Backrest; 3. Legs; 31. Front leg; 311. First support column; 32. Rear leg; 321. Second support column; 4. First connector; 41. First bearing; 42. First connecting column; 5. Second connector; 51. Second bearing; 6. Third connector; 61. Third bearing; 62. Third connecting column; 7. First connecting rod; 8. Second connecting rod; 9. Armrest. Detailed Implementation

[0023] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0024] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0027] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "a solution," "some solutions," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that solution or example is included in at least one solution or example of this invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same solution or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more solutions or examples.

[0028] like Figures 1-3 As shown, an embodiment of this utility model proposes an integrally molded high-strength plastic chair suitable for customers who prefer to lean back. It includes a seat 1, a backrest 2 integrally molded with the seat 1, and chair legs 3 disposed on the bottom surface of the seat 1. The chair legs 3 include front legs 31 and rear legs 32. Considering that customers who prefer to lean back will shift their center of gravity backward when sitting down, most of the customer's weight will be borne by the rear legs 32. This will cause the rear legs 32 to deform. Over time, the rear legs 32 will undergo irreversible bending, resulting in the rear legs 32 and the front legs 31 not being at the same height. This will cause the seat 1 to tilt, causing inconvenience to the customer and reducing the service life of the plastic chair.

[0029] Therefore, during the design process, it is necessary to consider that the front leg 31 should support the bent part of the rear leg 32 to extend the service life of the rear leg 32. The designers have configured the front leg 31 as two symmetrical first support columns 311. The first support columns 311 spirally pass through the first connector 4, the second connector 5, and another opposite first connector 4 from bottom to top, and are spirally connected to the bottom of the seat 1. The rear leg 32 is configured as including two symmetrical second support columns 321. The second support columns 321 spirally pass through a third connector 6 and are spirally connected to the bottom of the seat 1. One side of each of the two first connectors 4 is fixedly connected to one side of the third connector 6 via a first connecting rod 7. The second connector 5... One side is connected to the third connector 6 by a second connecting rod 8. When the second support column 321 on the back leg 32 bears most of the customer's weight, it will start to bend from the middle part of the second support column 321. At this time, the third connector 6, which is spirally installed in the middle position of the second support column 321, will protect and strengthen the middle part of the second support column 321. The first support column 311 will support the middle part of the second support column 321 through the first connecting rod 7 and the second connecting rod 8 to prevent the second support column 321 from deforming significantly. At the same time, the two first connecting rods 7 and the second connecting rod 8 form three triangles of different sizes, which are isosceles triangles, to improve the strength of the support.

[0030] Considering that the positions of the first connector 4, the second connector 5, and the first support column 311 need to be relatively defined, a spiral connection is used. The designer designed the first connector 4 to include a first bearing 41, with a connecting sleeve fixedly installed on the top of the inner layer of the first bearing 41. The inner wall of the connecting sleeve has spiral patterns. The first support column 311 passes through the inner layer of the first bearing 41 and spirally passes through the connecting sleeve. A first connecting column 42 is fixedly installed on one side of the outer layer of the first bearing 41. The third connector 6 includes a third bearing 61, with a connecting sleeve fixedly installed on the top of the inner layer of the third bearing 61. The inner wall of the connecting sleeve has spiral patterns. The second support column 321 passes through the inner layer of the third bearing 61 and spirally passes through the connecting sleeve. When the first support column 311 and the second support column 311... When the support column 321 spirals through the connecting sleeve, the operator needs to hold the connecting sleeve to prevent the connecting sleeve from rotating together with the first support column 311. When the first support column 311 passes through another opposite first connecting piece 4, it first spirals through the connecting sleeve and then through the first bearing 41. At the same time, considering the need to support the middle part of the second support column 321, the third connecting column 62 is fixedly installed on the outer layer of the third bearing 61. The top of the first connecting column 42 is fixedly connected to one end of the first connecting rod 7, and the other end of the first connecting rod 7 is fixedly connected to the bottom of the third connecting column 62. The bottom of the other first connecting column 42 is fixedly connected to the top of the third connecting column 62 through the first connecting rod 7, so that the two first connecting rods 7 and the first support column 311 form a triangle to improve the support strength.

[0031] To further enhance the support strength of the middle part of the second support column 321, the designers designed the second connecting piece 5 to include a second bearing 51. A connecting sleeve is fixedly installed on the top of the inner layer of the second bearing 51. The inner wall of the connecting sleeve is provided with a spiral pattern. The first support column 311 passes through the inner layer of the second bearing 51 and spirally passes through the connecting sleeve. The outer wall of the second bearing 51 is spirally connected to one end of the second connecting rod 8, and the other end of the second connecting rod 8 is spirally connected to the third connecting column 62. By forming three triangles of different sizes with the second connecting rod 8, the two first connecting rods 7, and the first support column 311, the support strength is further improved. The first bearing 41, the second bearing 51, and the third bearing 61 are bearings of the same size, and the connecting sleeves used are also of the same size.

[0032] Considering that customers will move on the seat 1 from time to time after sitting down, which will cause vibration, in order to prevent the connection between the first support column 311 and the second support column 321 and the seat 1 from loosening due to vibration, nylon anti-loosening gaskets are added at the connection between the first support column 311, the second support column 321 and the bottom of the seat 1. Nylon anti-loosening gaskets are anti-loosening fastening elements designed based on nylon material, mainly used to prevent bolts, nuts and other connecting parts from loosening under vibration or impact.

[0033] To improve customer comfort, armrests 9 are symmetrically installed on the top of the seat 1. When customers sit back in the chair for a long time, their backs will be pressed against the backrest 2, and their backs will easily sweat. Therefore, multiple ventilation holes are arranged in an orderly manner on the backrest 2.

[0034] Working principle: When a customer sits in a leaning posture on the chair, the center of gravity shifts backward. At this time, the rear leg 32 will bear most of the weight, causing the middle part of the rear leg 32 to bend and deform. The third connector 6 installed on the second support column 321 provides support and protection. At the same time, the first connecting rod 7, the second connecting rod 8 and the first support column 311 form three isosceles triangles of different sizes, which improves the support strength of the rear leg 32 and thus improves the service life of the plastic chair.

[0035] like Figure 4 As shown, when the customer's sitting posture is forward-leaning, the position of the chair leg 3 remains unchanged. The chair seat 1 and the chair back 2, which is integrally formed with the chair seat 1, are rotated 180° and installed on the chair leg 3. When the customer sits on the chair in a forward-leaning posture, the center of gravity shifts forward. At this time, the second support column 321 will bear most of the weight. The third connector 6 installed on the second support column 321 provides support and protection. At the same time, the first connecting rod 7, the second connecting rod 8 and the first support column 311 form three isosceles triangles of different sizes, which improves the support strength of the chair back leg 32 and thus improves the service life of the plastic chair.

[0036] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0037] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A one-piece high-strength plastic chair comprising a seat (1), a back (2) integral with the seat (1), and legs (3) provided on the bottom face of the seat (1), characterized in that, The chair legs (3) include front legs (31) and rear legs (32). The front legs (31) include two symmetrical first support columns (311). The first support columns (311) spirally pass through the first connector (4), the second connector (5) and another opposite first connector (4) from bottom to top, and are spirally connected to the bottom of the seat (1). The rear legs (32) include two symmetrical second support columns (321). The second support columns (321) spirally pass through a third connector (6) and are spirally connected to the bottom of the seat (1). One side of the two first connectors (4) is fixedly connected to one side of the third connector (6) by a first connecting rod (7). One side of the second connector (5) is spirally connected to the third connector (6) by a second connecting rod (8).

2. The one-piece high-strength plastic chair according to claim 1, wherein The first connector (4) includes a first bearing (41), a connecting sleeve is fixedly installed on the top of the inner layer of the first bearing (41), the inner wall of the connecting sleeve is provided with a spiral pattern, the first support column (311) passes through the inner layer of the first bearing (41) and spirally passes through the connecting sleeve, the first connecting column (42) is fixedly installed on one side of the outer layer of the first bearing (41), the third connector (6) includes a third bearing (61), a connecting sleeve is fixedly installed on the top of the inner layer of the third bearing (61), the inner wall of the connecting sleeve is provided with a spiral pattern, the second support column (321) passes through the inner layer of the third bearing (61) and spirally passes through the connecting sleeve, the third connecting column (62) is fixedly installed on the outer layer of the third bearing (61), the top of the first connecting column (42) is fixedly connected to one end of the first connecting rod (7), the other end of the first connecting rod (7) is fixedly connected to the bottom of the third connecting column (62), and the bottom of another first connecting column (42) is fixedly connected to the top of the third connecting column (62) through the first connecting rod (7).

3. The one-piece high-strength plastic chair according to claim 2, wherein The second connector (5) includes a second bearing (51), a connecting sleeve is fixedly installed on the top of the inner layer of the second bearing (51), the inner wall of the connecting sleeve is provided with a spiral pattern, the first support column (311) passes through the inner layer of the second bearing (51) and spirally passes through the connecting sleeve, the outer wall of the second bearing (51) is spirally connected to one end of the second connecting rod (8), and the other end of the second connecting rod (8) is spirally connected to the third connecting column (62).

4. The one-piece high-strength plastic chair of claim 1, wherein, Three triangles of different sizes are formed between the two first connecting rods (7) and the second connecting rod (8), and the triangles are isosceles triangles.

5. The one-piece high-strength plastic chair of claim 1, wherein, A nylon anti-loosening pad is added at the connection between the first support column (311), the second support column (321) and the bottom of the chair seat (1).

6. The one-piece high-strength plastic chair of claim 1, wherein, Armrests (9) are symmetrically installed on the top of the seat (1).

7. The one-piece high-strength plastic chair of claim 1, wherein, The chair back (2) is provided with multiple ventilation holes in an orderly manner.

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