Auditorium chair with turnover backrest

Abstract

The utility model relates to the technical field of auditorium chairs, and discloses an auditorium chair with a folding backrest, which comprises a chair back, standing legs, armrests and a chair seat, the standing legs are connected with the bottom end of the chair back, two ends of the front side of the chair back are respectively connected with side plates, the top ends of the side plates are connected with the armrests, the chair seat is arranged between the opposite side plates, and the folding backrest is arranged on the chair seat. The chair seat is hinged between the side plates through a torsion spring, the top end of the chair back is connected with a hinge shaft, the chair back is hinged with a top plate capable of supporting the head through the hinge shaft, the top plate can be folded to the free end to abut against the end of the chair seat, and the hinge shaft is connected with an angle positioning assembly capable of positioning the angle of the top plate. Compared with the prior art, the chair has the advantages that the chair back is arranged in a two-section manner, so that the chair back and the chair seat are conveniently shielded by matching with the side plates, dust is prevented from falling off to increase cleaning burden, and the bottom of the chair is conveniently cleaned.

Description

Technical Field

[0001] This utility model relates to the field of auditorium chair technology, specifically to an auditorium chair with a folding backrest. Background Technology

[0002] Auditorium chairs mainly consist of a backrest and armrests fixedly connected to form a frame, which is integrated into one unit, while the seat can be fixed between the armrests. The space under the seat is small, making it inconvenient to clean; when not in use, the backrest and seat are exposed to the external environment, causing dust to settle on the backrest and seat, increasing the cleaning workload. Utility Model Content

[0003] I. Technical problems to be solved

[0004] The technical problem this invention aims to solve is that the space under the seat is too small, making it inconvenient to clean; the backrest and seat are exposed to the external environment, making them prone to dust accumulation and increasing the cleaning burden.

[0005] II. Technical Solution

[0006] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: an auditorium chair with a folding backrest, including a backrest, legs, armrests, and a seat. The legs are connected to the bottom end of the backrest. Side panels are respectively connected to the two ends of the front side of the backrest. Armrests are connected to the top of the side panels. The seat is located between the opposite side panels and is hinged between the side panels by a torsion spring. A hinge shaft is connected to the top of the backrest. A top plate that can support the head is hinged to the backrest by the hinge shaft. The top plate can be folded up to abut the end of the seat. An angle positioning component that can position the angle of the top plate is connected to the hinge shaft.

[0007] Furthermore, a limiting rod is provided between the bottom of the side panel and the bottom of the seat away from the backrest, and the limiting rod can be set to abut against the bottom of the seat.

[0008] Furthermore, the angle positioning component includes a sliding cavity disposed within the hinge shaft, one end of the sliding cavity being connected to a through-hole, a sliding rod being slidably connected within the sliding cavity, the sliding rod being slidably connected to the sliding cavity, the hinge shaft being provided with a plurality of through holes circumferentially around the sliding cavity, a limiting bead being disposed within the through holes, and a limiting groove being provided opposite to the top plate, the limiting bead being able to engage with the limiting groove for limiting when the sliding rod is lifted from the side wall.

[0009] Furthermore, the slide rod is provided with an annular groove, and the limiting bead passes through the through hole to cooperate with the annular groove. A connecting rod is connected to one end of the slide rod near the sliding hole, and a pull plate is connected to the other end of the connecting rod. A spring is provided between the pull plate and the hinge shaft, and the spring is sleeved on the outside of the connecting rod.

[0010] Furthermore, the distance between the end of the slide rod near the connecting rod and the end wall of the slide cavity matches the distance between the limiting bead and the annular groove.

[0011] Furthermore, the distance between the hinge point of the chair back and the side panel and the chair back is less than the width of the top panel.

[0012] III. Beneficial Effects

[0013] The advantages of this utility model compared with the prior art are as follows:

[0014] The hinged design of the seat allows it to automatically fold down to be parallel to the backrest when not in use, making it easier to clean the space under the auditorium chairs. The two-section design of the backrest and top panel allows for individual adjustment of the top panel angle. The combination of the angle positioning component and the hinge shaft facilitates positioning after the hinge angle of the top panel is adjusted, so as to provide support for the head as needed. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of an auditorium chair with a folding backrest according to the present invention.

[0016] Figure 2 This is a schematic diagram of the main cross-sectional structure of an auditorium chair with a folding backrest according to the present invention.

[0017] Figure 3 This is a side sectional view of an auditorium chair with a folding backrest, according to the present invention.

[0018] Figure 4 yes Figure 3 A magnified structural diagram of A in the diagram.

[0019] As shown in the figure: 1. Chair back, 2. Chair seat, 3. Side panel, 4. Hinge shaft, 5. Top panel, 6. Limiting rod, 7. Sliding cavity, 8. Sliding rod, 9. Through hole, 10. Limiting bead, 11. Limiting groove, 12. Circular groove, 13. Pull plate, 14. Spring. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0021] Example 1

[0022] To allow the top plate 5 to rotate around its hinge point with the backrest 1, a two-section design is adopted for the top plate 5 and the backrest 1, thus enabling independent angle adjustment of the top plate 5. This is combined with the attached... Figure 1 An auditorium chair with a folding backrest includes a backrest 1, legs, armrests, and a seat 2. The legs are connected to the bottom of the backrest 1. Side panels 3 are connected to the front two ends of the backrest 1, and armrests are connected to the top of the side panels 3. The seat 2 is located between the opposite side panels 3. A hinge shaft 4 is connected to the top of the backrest 1. A top plate 5 that can support the head is hinged to the backrest 1 through the hinge shaft 4. The top plate 5 can be folded down to its free end and abut against the end of the seat 2. The distance between the hinge point of the backrest 1 and the side panels 3 and the backrest 1 is less than the width of the top plate 5.

[0023] To achieve the desired hinge angle between the top plate 5 and the backrest 1, and to provide stable head support, in conjunction with the attached... Figure 2 , Figure 3 and Figure 4 The hinge shaft 4 is connected to an angle positioning component for positioning the top plate 5. The angle positioning component includes a sliding cavity 7 within the hinge shaft 4, one end of which is connected to a through-hole. A sliding rod 8 is slidably connected within the sliding cavity 7. The hinge shaft 4 has several through holes 9 circumferentially around the sliding cavity 7. Limiting beads 10 are located within the through holes 9. A limiting groove 11 is provided on the top plate 5. The limiting beads 10 can engage with the limiting groove 11 when the sliding rod 8 is lifted from the side wall. The slide rod 8 is provided with an annular groove 12. The limiting bead 10 passes through the through hole 9 and can cooperate with the annular groove 12. The distance between the end of the slide rod 8 near the connecting rod and the end wall of the sliding cavity 7 is the same as the distance between the limiting bead 10 and the annular groove 12. The end of the slide rod 8 near the sliding hole is connected to a connecting rod that slides and cooperates with the sliding hole. The diameter of the connecting rod is smaller than the diameter of the slide rod 8. The other end of the connecting rod is connected to a pull plate 13. A spring 14 is provided between the pull plate 13 and the hinge shaft 4. The spring 14 is sleeved on the outside of the connecting rod.

[0024] Example 2

[0025] Based on Embodiment 1, in order to achieve stable support for the seat 2, combined with the attached... Figure 2 The seat 2 is hinged to the side plate 3 by a torsion spring. The side plate 3 is connected to the bottom of the seat 2 away from the backrest 1 by a limiting rod 6. The limiting rod 6 can be set to limit and abut against the bottom of the seat 2. The seat 2 can be rotated counterclockwise around the hinge point with the side plate 3. When the seat 2 is rotated to the bottom and abuts against the limiting rod 6, the seat 2 can be stably supported.

[0026] The specific usage method is as follows:

[0027] In its natural state, the pull plate 13 drives the connecting rod under the action of the spring 14 to move the slide rod 8 to the periphery of the slide rod 8 and abut against the limiting bead 10. The limiting bead 10 is lifted by the periphery of the slide rod 8, passes through the through hole 9 and cooperates with the limiting groove 11 on the top plate 5, thereby positioning the top plate 5.

[0028] If the angle of the top plate 5 needs to be adjusted, the pull plate 13 can be pulled. The pull plate 13 drives the slide rod 8 to slide along the slide cavity 7 through the connecting rod. The distance between the end of the slide rod 8 near the connecting rod and the end wall of the slide cavity 7 is the same as the distance between the limiting bead 10 and the annular groove 12. When the pull plate 13 drives the slide rod 8 to slide until it can no longer move, the limiting bead 10 can pass through the through hole 9 and cooperate with the annular groove 12. At this time, the top plate 5 can be rotated to the required angle at will. The top plate 5 can abut against the end of the seat 2, which facilitates the protection of the backrest 1, the seat 2 and the inner side of the top plate 5, and reduces the possibility of dust falling.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0031] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. An auditorium chair with a folding backrest, comprising a backrest (1), legs, armrests, and a seat (2), wherein the legs are connected to the bottom end of the backrest (1), side panels (3) are respectively connected to the two ends of the front side of the backrest (1), armrests are connected to the top of the side panels (3), and the seat (2) is disposed between the opposite side panels (3), characterized in that: The seat (2) is hinged to the side plates (3) by a torsion spring. The top of the backrest (1) is connected to a hinge shaft (4). The backrest (1) is hinged to a top plate (5) that can support the head by the hinge shaft (4). The top plate (5) can be folded up to abut the end of the seat (2). An angle positioning component that can position the angle of the top plate (5) is connected to the hinge shaft (4).

2. An auditorium chair with a folding backrest according to claim 1, characterized in that: The side plate (3) is connected to the bottom of the seat (2) on the side away from the backrest (1) by a limiting rod (6), which can be positioned to abut against the bottom of the seat (2).

3. An auditorium chair with a folding backrest according to claim 1, characterized in that: The angle positioning component includes a sliding cavity (7) located within the hinge shaft (4). One end of the sliding cavity (7) is connected to a through-hole. A sliding rod (8) is slidably connected within the sliding cavity (7). The hinge shaft (4) has several through holes (9) circumferentially located around the sliding cavity (7). A limiting bead (10) is located within each through hole (9). A limiting groove (11) is located opposite to the top plate (5). The limiting bead (10) can be positioned and engaged with the limiting groove (11) when the sliding rod (8) is lifted from the side wall.

4. An auditorium chair with a folding backrest according to claim 3, characterized in that: The slide rod (8) is provided with an annular groove (12). The limiting bead (10) passes through the through hole (9) and can cooperate with the annular groove (12). The slide rod (8) is connected to a connecting rod that slides with the sliding hole at one end. The other end of the connecting rod is connected to a pull plate (13). A spring (14) is provided between the pull plate (13) and the hinge shaft (4). The spring (14) is sleeved on the outside of the connecting rod.

5. An auditorium chair with a folding backrest according to claim 4, characterized in that: The distance between the end of the slide rod (8) near the connecting rod and the end wall of the slide cavity (7) is the same as the distance between the limiting bead (10) and the annular groove (12).

6. An auditorium chair with a folding backrest according to claim 5, characterized in that: The distance between the hinge point of the chair back (1) and the side panel (3) and the chair back (1) is less than the width of the top panel (5).

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