Cinema chair with detachable cover

Abstract

The invention relates to the technical field of cinema chairs, and discloses a cinema chair with a detachable surface cover, which comprises two symmetrically arranged seat armrests, and a seat backrest and a seat bag which are arranged between the two seat armrests, the seat backrest comprises a backrest frame body, a sponge supporting body arranged on the front side of the backrest frame body and a backrest face sleeve arranged on the sponge supporting body and the backrest frame body in a sleeving mode, and the back face of the backrest frame body is provided with a plurality of first bent hooks close to the edge of the back face. The seat bag comprises a seat plate, a sponge cushion arranged on the top of the seat plate, a seat bag surface sleeve arranged on the sponge cushion and the seat plate in a sleeving manner, and a metal plate frame arranged on the bottom surface of the seat plate, a plurality of second hooks are arranged on the metal plate frame, and the first hooks are matched with the first buckle holes of the first outer positioning sheet body; and through the design that a second hook is matched with a second buckle hole of a second outer positioning sheet body, the seat bag surface sleeve and the backrest surface sleeve are more convenient to mount and dismount, and the backrest surface sleeve and the seat bag surface sleeve can be easily dismounted to be cleaned or replaced.

Description

Technical Field

[0001] The invention relates to the technical field of cinema chairs, and in particular to a cinema chair with a detachable cover. Background Art

[0002] Cinema chairs are covered with covers. The cover material can not only improve the overall durability of the seat, protect the internal filling from wear and tear, and extend the service life of the seat, but also provide a soft touch, increase the comfort of the seat, and make the audience feel more comfortable when watching movies or attending events for a long time. In addition, the cover can be designed into various colors, patterns and textures according to different venues to match the overall interior decoration style and enhance the beauty of the space.

[0003] However, the covers on the backrests and seats of most theater chairs are not removable or inconvenient to remove. After long-term use, dust and stains will accumulate on the covers, and the colors of the covers may even fade or become worn. It is necessary to regularly remove and clean the covers on the backrests and seats, or replace them with new covers.

[0004] It can be seen that the existing technology still needs to be improved and enhanced. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a cinema chair with a detachable cover, so as to facilitate the disassembly and installation of a backrest cover and a seat cover.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A cinema chair with a detachable cover, comprising two symmetrically arranged seat armrests, a seat back and a seat bag arranged between the two seat armrests, characterized in that the seat back comprises a backrest frame, a sponge support body arranged at the front side of the backrest frame, and a backrest back cover sleeved on the sponge support body and the backrest frame, the back of the backrest frame is provided with a plurality of first hooks arranged adjacent to the back edge, the backrest back cover comprises a backrest portion, a first surrounding edge portion integrally connected to the edge of the backrest portion, and a plurality of first outer positioning sheets connected to the rear edge of the first surrounding edge portion, The first outer positioning sheet is provided with a first buckle hole matching with the corresponding first hook; the seat bag includes a seat plate, a sponge pad arranged on the top of the seat plate, a seat bag surface cover arranged on the sponge pad and the seat plate, and a sheet metal frame arranged on the bottom surface of the seat plate, the sheet metal frame is provided with a plurality of second hooks, the seat bag surface cover includes a cushion portion, a second surrounding edge portion integrally connected to the edge of the cushion portion, and a plurality of second outer positioning sheets connected to the lower edge of the second surrounding edge portion, and the second outer positioning sheet is provided with a second buckle hole matching with the corresponding second hook.

[0008] As a further improvement of the above technical solution, the backrest cover also includes a plurality of first inner positioning sheets arranged inside the backrest part, the first inner positioning sheets can penetrate the sponge support body and the part passing through the sponge support body is provided with a plurality of third buckle holes, the backrest frame is provided with a plurality of third hooks matching with the third buckle holes, and the first inner positioning sheets pull the middle area of ​​the backrest part to fit tightly against the sponge support body.

[0009] As a further improvement of the above technical solution, the first inner positioning sheet is provided with three pieces which are arranged in a door shape and are arranged in the middle of the backrest.

[0010] As a further improvement of the above technical solution, the seat cover also includes a plurality of second inner positioning sheets arranged inside the seat cushion part, the second inner positioning sheets can pass through the sponge pad and the part passing through the sponge pad is provided with a plurality of fourth buckle holes, the sheet metal frame is provided with a plurality of fourth hooks matching with the fourth buckle holes, and the second inner positioning sheets pull the middle area of ​​the seat cushion part to fit tightly against the sponge pad.

[0011] As a further improvement of the above technical solution, four first outer positioning sheets are provided and arranged in a square, the first hooks are arranged in a square at intervals, four second outer positioning sheets are provided and arranged in a square, and the second hooks are arranged in a square at intervals.

[0012] As a further improvement of the above technical solution, a back shell is installed on the back of the backrest frame by means of a snap connection.

[0013] As a further improvement of the above technical solution, a mounting hole is provided on the back of the back shell, and a locking threaded hole corresponding to the mounting hole is provided on the backrest frame, and the mounting screw passes through the mounting hole of the back shell and then connects with the locking threaded hole.

[0014] As a further improvement of the above technical solution, a bottom shell is installed on the bottom of the sheet metal frame by means of a snap connection.

[0015] As a further improvement of the above technical solution, a transversely extending flip rod is provided on the sheet metal frame, the flip rod is rotatably connected to the two seat armrests, and a reset structure for driving the seat to flip and reset is provided on the seat.

[0016] As a further improvement of the above technical solution, a rocking mechanism is provided on the inner sides of the two seat armrests, and the two sides of the backrest frame are connected to the corresponding rocking mechanisms.

[0017] The beneficial effects of the present invention are as follows: compared with the prior art, the backrest cover and seat cover of the theater chair provided by the present invention can be easily removed for cleaning or replacement, which helps to keep the seat clean and hygienic and extend the overall service life of the seat. The first curved hook is designed to cooperate with the first buckle hole of the first outer positioning sheet, so that the installation and removal of the backrest cover becomes more convenient. The second curved hook is designed to cooperate with the second buckle hole of the second outer positioning sheet, so that the installation and removal of the seat cover becomes more convenient, and the operation can be completed without professional tools. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The three-dimensional structure of the theater chair provided by the present invention Figure 1 .

[0019] Figure 2 The three-dimensional structure of the theater chair provided by the present invention Figure 2 .

[0020] Figure 3 It is a schematic diagram of the cooperation between the first outer positioning sheet and the first hook in the seat back.

[0021] Figure 4 It is a structural schematic diagram of the backrest cover.

[0022] Figure 5 It is a three-dimensional diagram of a sponge support.

[0023] Figure 6 It is a schematic diagram of the cooperation between the first inner positioning sheet and the third hook in the seat back.

[0024] Figure 7 It is a schematic diagram of the cooperation between the second outer positioning sheet and the second hook in the seat bag.

[0025] Figure 8 It is a structural schematic diagram of a seat cover.

[0026] Fig. 9 It is a three-dimensional picture of the sponge pad.

[0027] Fig.10 A three-dimensional image of a sheet metal frame.

[0028] Fig.11 It is a schematic diagram of the cooperation between the second inner positioning sheet and the fourth hook in the seat bag.

[0029] Main component symbol description: 5-seat backrest, 51-backrest frame, 511-first hook, 512-third hook, 513-locking threaded hole, 514-operating window, 52-sponge support, 521-first perforation, 53-backrest cover, 531-backrest, 532-first surrounding edge, 533-first outer positioning sheet, 5331-first buckle hole, 534-first inner positioning sheet, 5341-third buckle hole, 54-back shell, 6-seat bag, 611- Seat plate, 6111-avoidance hole, 612-sponge pad, 6121-second perforation, 613-bottom shell, 62-seat cover, 621-cushion part, 622-second surrounding edge part, 623-second outer positioning sheet, 6231-second buckle hole, 624-second inner positioning sheet, 6241-fourth buckle hole, 631-sheet metal frame, 632-second hook, 633-fourth hook, 641-flip rod, 642-reset structure, 7-seat armrest, 8-swing mechanism. DETAILED DESCRIPTION

[0030] The present invention provides a theater chair with a detachable cover. In order to make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention and are not used to limit the scope of protection of the present invention.

[0031] See also Figure 1-Figure 11 The present invention provides a cinema chair with a detachable cover, comprising two symmetrically arranged seat armrests 7, a seat back 5 and a seat bag 6 arranged between the two seat armrests 7, the seat back 5 comprising a back frame 51, a sponge support body 52 arranged on the front side of the back frame 51, and a back cover 53 sleeved on the sponge support body 52 and the back frame 51, the back of the back frame 51 is provided with a plurality of first hooks 511 arranged adjacent to the back edge, the back cover 53 comprises a backrest portion 531, a first surrounding edge portion 532 integrally connected to the edge of the backrest portion 531, and a plurality of first outer positioning sheets 533 connected to the rear edge of the first surrounding edge portion 532, the first outer positioning sheets 533 are opened A first buckle hole 5331 is provided to match the corresponding first hook 511; the seat bag 6 includes a seat plate 611, a sponge pad 612 arranged on the top of the seat plate 611, a seat bag cover 62 mounted on the sponge pad 612 and the seat plate 611, and a sheet metal frame 631 arranged on the bottom surface of the seat plate 611, and a plurality of second hooks 632 are provided on the sheet metal frame 631, and the seat bag cover 62 includes a cushion portion 621, a second surrounding edge portion 622 integrally connected to the edge of the cushion portion 621, and a plurality of second outer positioning sheets 623 connected to the lower edge of the second surrounding edge portion 622, and the second outer positioning sheet 623 is provided with second buckle holes 6231 to match the corresponding second hooks 632.

[0032] Compared with the prior art, the backrest cover 53 and the seat cover 62 of the theater chair provided by the present invention can be easily removed for cleaning or replacement, which helps to keep the seat clean and hygienic and extend the overall service life of the seat. The first curved hook 511 is designed to cooperate with the first buckle hole 5331 of the first outer positioning sheet 533, so that the installation and removal of the backrest cover 53 becomes more convenient. The second curved hook 632 is designed to cooperate with the second buckle hole 6231 of the second outer positioning sheet 623, so that the installation and removal of the seat cover 62 becomes more convenient and the operation can be completed without professional tools.

[0033] The backrest cover 53 is designed to cooperate with the first buckle hole 5331 of the outer positioning plate body through the first hook 511, which not only makes the installation and removal of the backrest cover 53 more convenient, the backrest cover 53 can be easily removed for cleaning or replacement, and the stability of the backrest cover 53 during use is ensured, and it is not easy to loosen or fall off. Similarly, the seat cover 62 is designed to cooperate with the second buckle hole 6231 of the second outer positioning plate body 623 through the second hook 632, which not only makes the installation and removal of the seat cover 62 more convenient, the seat cover 62 can be easily removed for cleaning or replacement, and the stability of the seat cover 62 during use is ensured, and it is not easy to loosen or fall off, which helps to keep the seat clean and hygienic and extend the overall service life of the seat.

[0034] In one embodiment, the backrest portion 531 and the first surrounding edge portion 532 of the backrest back cover 53 are made of cloth, the cushion portion 621 and the second surrounding edge portion 622 of the seat cover 62 are made of cloth, and the first outer positioning piece 533 and the second outer positioning piece 623 are made of plastic. The plastic first outer positioning piece 533 and the second outer positioning piece 623 have good toughness and can withstand a certain tensile force without being easily broken, thereby improving the durability of the entire cover structure, especially the first outer positioning piece 533 and the second outer positioning piece 623 are not easily damaged during repeated disassembly and assembly. The first outer positioning piece 533 is connected to the first surrounding edge portion 532 by sewing, and the second outer positioning piece 623 is connected to the second surrounding edge portion 622 by sewing, which not only ensures the firmness of the connection part, but also simplifies the manufacturing process and reduces the difficulty of production.

[0035] In another embodiment, see Figure 4As shown, the backrest portion 531 and the first surrounding edge portion 532 of the backrest cover 53 are made of leather, and the cushion portion 621 and the second surrounding edge portion 622 of the seat cover 62 are made of leather, so there are obvious leather stitching lines on the backrest cover 53 and the seat cover 62, and the first outer positioning piece 533 and the second outer positioning piece 623 are made of plastic. The plastic first outer positioning piece 533 and the second outer positioning piece 623 have good toughness and can withstand a certain tensile force without being easily broken, thereby improving the durability of the entire cover structure, especially the first outer positioning piece 533 and the second outer positioning piece 623 are not easily damaged during repeated disassembly and assembly. The first outer positioning piece 533 is connected to the first surrounding edge portion 532 by sewing, and the second outer positioning piece 623 is connected to the second surrounding edge portion 622 by sewing, which not only ensures the firmness of the connection part, but also simplifies the manufacturing process and reduces the difficulty of production.

[0036] It should be noted that the backrest frame 51 is provided with an operation window 514 for a worker to pull the first inner positioning piece 534 .

[0037] In order to provide reliable and comfortable support for the user's back and reduce back fatigue, the sponge support body 52 is designed according to ergonomics. In order to ensure that the backrest portion 531 of the backrest cover 53 can be closely attached to the surface of the sponge support body 52, Figure 3-Figure 6 As shown, the backrest cover 53 also includes a plurality of first inner positioning sheets 534 arranged inside the backrest portion 531, the first inner positioning sheets 534 can penetrate the sponge support body 52 and the portion passing through the sponge support body 52 is provided with a plurality of third buckle holes 5341, the backrest frame 51 is provided with a plurality of third hooks 512 matched with the third buckle holes 5341, the matching design of the third buckle holes 5341 and the third hooks 512 simplifies the installation process of the backrest cover 53, making the installation more convenient without the need for complicated tools, the first inner positioning sheets 534 pull the middle area of ​​the backrest portion 531 to be close to the sponge support body 52, and avoids the backrest cover 53 from wrinkling or loosening during use. It can be understood that the sponge support body 52 is provided with a first through hole 521 for the first inner positioning sheet 534 to pass through and a back groove for the third hook 512 to be movably installed, and the back groove is connected to the first through hole 521.

[0038] If the backrest portion 531 of the backrest cover 53 is made of leather, Figure 4 As shown, the backrest portion 531 will form a shaped stitching line, and the first inner positioning sheet 534 is provided with three arranged side by side in a door shape and arranged in the middle of the backrest portion 531 to provide evenly distributed traction.

[0039] Similarly, the first inner positioning sheet 534 is connected to the backrest portion 531 by sewing, and the sewing connection method ensures a firm connection between the first inner positioning sheet 534 and the backrest portion 531, thereby improving the stability of the entire backrest back cover 53 structure, especially being able to effectively resist the stress generated by the backrest during use.

[0040] In order to improve the riding comfort and reduce the discomfort caused by sitting for a long time, the sponge pad 612 is designed according to ergonomics. In order to ensure that the cushion part 621 of the seat cover 62 can be closely attached to the surface of the cushion part 621, see Figure 8 and Fig.11 As shown, the seat cover 62 also includes a plurality of second inner positioning sheets 624 arranged inside the cushion portion 621, the second inner positioning sheets 624 can penetrate the sponge pad 612 and the portion passing through the sponge pad 612 is provided with a plurality of fourth buckle holes 6241, the sheet metal frame 631 is provided with a plurality of fourth hooks 633 matching with the fourth buckle holes 6241, the matching design of the fourth buckle holes 6241 and the fourth hooks 633 simplifies the installation process of the seat cover 62, making the installation more convenient without the need for complicated tools, the second inner positioning sheets 624 pull the middle area of ​​the cushion portion 621 to fit tightly against the sponge pad 612, thereby preventing the seat cover 62 from wrinkling or loosening during use. It can be understood that the sponge pad 612 is provided with a second through hole 6121 for the second inner positioning sheet 624 to pass through and a lower groove for the fourth hook 633 to be movably installed, the lower groove is connected to the second through hole 6121, and the seat plate 611 is provided with an avoidance hole 6111 for the fourth hook 633 to pass through.

[0041] In this embodiment, see Figure 8 As shown, there are four first outer positioning sheets 533 and they are arranged in a square shape, and the first hooks 511 are arranged at intervals in a square shape, and the four first outer positioning sheets 533 correspond to the positioning of the first surrounding edge portion 532 of the backrest cover 53 in four directions of up, down, left and right respectively, and each first outer positioning sheet 533 has a plurality of first buckle holes 5331 arranged at intervals along its length direction, and the backrest frame 51 is provided with the same number of first buckle holes 5331 and one-to-one corresponding to the first buckle holes 5331, so as to evenly distribute the tension of the backrest cover 53, improve the stability of the backrest cover 53 on the backrest frame 51 and the sponge support body 52, and prevent the backrest cover 53 from becoming loose or deformed during use.

[0042] In this embodiment, see Figure 8As shown, there are four second outer positioning pieces 623 arranged in a square shape, and the second hooks 632 are arranged at intervals in a square shape. In other words, the four second outer positioning pieces 623 correspond to the positioning of the four directions of the front, back, left, and right of the surrounding edge of the seat cover 62, respectively, and each second outer positioning piece 623 is provided with a plurality of second buckle holes 6231 arranged at intervals along its length direction, and the sheet metal frame 631 is provided with the same number of second buckle holes 6231 and one-to-one corresponding second hooks 632, which evenly distribute the tension of the seat cover 62, improve the stability of the seat cover 62 on the seat, and prevent the seat cover 62 from being loosened or deformed during use.

[0043] A back shell 54 is installed on the back of the back frame 51 by a snap-fit ​​connection, and the back shell 54 covers the back of the back frame 51, that is, the first outer positioning sheet 533 is located between the back frame 51 and the back shell 54, and the back shell 54 can cover the first outer positioning sheet 533, which is more beautiful and durable.

[0044] Furthermore, in order to prevent the back shell body 54 from being removed by mistake and to improve the reliability of the connection, a mounting hole is provided on the back side of the back shell body 54, and a locking threaded hole 513 corresponding to the mounting hole is provided on the backrest frame 51. The mounting screw passes through the mounting hole of the back shell body 54 and is then connected to the locking threaded hole 513 for locking. A screwdriver is required to tighten the mounting screw to fix or remove the back shell body 54.

[0045] In this embodiment, the backrest frame 51 is an injection-molded part, that is, the backrest frame 51, the first hook 511, and the second hook 632 are all integrally formed by injection molding.

[0046] The disassembly process of the backrest cover 53 is as follows: the staff first uses a screwdriver to remove the mounting screws on the back shell 54, and then releases the snap connection to remove the back shell 54, and then pulls the first inner positioning sheet 534 to separate the third buckle hole 5341 on the first inner positioning sheet 534 from the third hook 512, and then pulls the first outer positioning sheet 533 to separate the third buckle hole 5341 on the first outer positioning sheet 533 from the third hook 512, thereby releasing the fixation of the backrest cover 53, and finally pulls the backrest cover 53 and the sponge support body 52 to remove them.

[0047] On the contrary, the installation process of the backrest cover 53 is as follows: the first inner positioning piece 534 on the backrest cover 53 passes through the first through hole 521 of the sponge support body 52, the first surrounding edge portion 532 of the backrest cover 53 first covers the sponge support body 52 and then covers the backrest frame 51, and then the first buckle hole 5331 on the first outer positioning piece 533 is buckled on the first hook 511 of the backrest frame 51, and then the third buckle hole 5341 on the first inner positioning piece 534 is buckled on the third hook 512 of the backrest frame 51, and finally the back shell 54 is installed and fixed.

[0048] In order to cover the second hook 632 and the second outer positioning sheet 623 to prevent the user from scratching the second hook 632 when passing through the aisle and to increase the aesthetics, the bottom of the sheet metal frame 631 is installed with a bottom shell 613 by a snap-on connection.

[0049] The disassembly process of the seat cover 62 is as follows: first release the snap connection to remove the bottom shell 613, then pull the second inner positioning sheet 624 to separate the fourth buckle hole 6241 on the second inner positioning sheet 624 from the fourth hook 633, then pull the second outer positioning sheet 623 to separate the second buckle hole 6231 on the second outer positioning sheet 623 from the second hook 632, release the fixation of the seat cover 62, and finally pull the seat cover 62 and the sponge pad 612 to remove them.

[0050] On the contrary, the installation process of the seat cover 62 is as follows: the second inner positioning sheet 624 on the seat cover 62 passes through the second through hole 6121 of the sponge pad 612, the second surrounding edge 622 of the seat cover 62 first covers the sponge pad 612 and then covers the seat plate 611, and then the second buckle hole 6231 on the second outer positioning sheet 623 is buckled on the second hook 632 of the sheet metal frame 631, and then the fourth buckle hole 6241 on the second inner positioning sheet 624 is buckled on the fourth hook 633 of the sheet metal frame 631, and finally the bottom shell 613 is installed.

[0051] In actual applications, the seat bag 6 of the theater chair has an automatic flipping function, that is, when the seat is not in use, the automatic flipping function can make the seat bag 6 stand upright, providing more space for pedestrians walking in the aisle, reducing the risk of collision and tripping; therefore, a laterally extending flip rod 641 is provided on the sheet metal frame 631, and the flip rod 641 is rotatably connected to the two seat armrests 7, and a reset structure 642 is provided on the seat plate 611 for driving the seat plate 611 to flip and reset. The reset structure 642 can be a counterweight positioning structure 642, a tension spring reset structure 642, etc., and the specific structure will not be elaborated.

[0052] The inner sides of the two seat armrests 7 are provided with a rocking mechanism 8, and the two sides of the backrest frame 51 are connected to the corresponding rocking mechanism 8. The rocking mechanism 8 includes a vertical plate and a coil spring arranged on the vertical plate; the central end of the coil spring is fixed on the vertical plate, and the other end of the coil spring is provided with a side arm, and the side arm is connected to the backrest frame 51, and the vertical plate is provided with a cover body covering the coil spring. When the audience's body lies on the seat back 5, the seat back 5 will swing backward, so that the coil spring will stretch and deform; when the audience leaves the seat back 5 or the force on the seat back 5 is reduced, the elastic force of the deformation recovery of the coil spring drives the seat back 5 to form a forward swinging trend, and the audience changes the pressure on the seat back 5 frequently in a short time, so that the seat back 5 forms a reciprocating forward and backward swinging posture, so that the audience and the seat back 5 interact, and the riding interest is improved.

[0053] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0054] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present invention, and all these changes or substitutions should fall within the protection scope of the present invention.

Claims

1. A cinema chair with a detachable cover, comprising two symmetrically arranged seat armrests, a seat back and a seat cushion arranged between the two seat armrests, characterized in that: The seat back comprises a backrest frame, a sponge supporting body arranged on the front side of the backrest frame, and a backrest surface cover sleeved on the sponge supporting body and the backrest frame, the back of the backrest frame is provided with a plurality of first hooks arranged adjacent to the back edge, the back of the backrest frame is provided with a plurality of first hooks, the backrest surface cover comprises a backrest portion, a first surrounding edge portion integrally connected to the edge of the backrest portion, and a plurality of first outer positioning sheets connected to the rear edge of the first surrounding edge portion, the first outer positioning sheet body is provided with a first buckle hole matching the corresponding first hook; the seat bag comprises a seat plate, a sponge pad arranged on the top of the seat plate, a seat bag surface cover sleeved on the sponge pad and the seat plate, and a sheet metal frame arranged on the bottom surface of the seat plate, the sheet metal frame is provided with a plurality of second hooks, the seat bag surface cover comprises a cushion portion, a second surrounding edge portion integrally connected to the edge of the seat cushion portion, and a plurality of second outer positioning sheets connected to the lower edge of the second surrounding edge portion, the second outer positioning sheet body is provided with a second buckle hole matching the corresponding second hook.

2. The theater chair with a detachable cover according to claim 1, characterized in that: The backrest cover also includes a plurality of first inner positioning sheets arranged inside the backrest portion, the first inner positioning sheets can penetrate the sponge support body and the portion passing through the sponge support body is provided with a plurality of third buckle holes, the backrest frame is provided with a plurality of third hooks matching with the third buckle holes, the first inner positioning sheets pull the middle area of ​​the backrest portion to fit tightly against the sponge support body.

3. The theater chair with a detachable cover according to claim 2, characterized in that: The first inner positioning sheets are provided with three and arranged in a door shape in the middle of the backrest.

4. The theater chair with a detachable cover according to claim 1, characterized in that: The seat cover also includes a plurality of second inner positioning sheets arranged inside the seat cushion portion, the second inner positioning sheets can penetrate the sponge pad and the portion passing through the sponge pad is provided with a plurality of fourth buckle holes, the sheet metal frame is provided with a plurality of fourth hooks matching with the fourth buckle holes, the second inner positioning sheets pull the middle area of ​​the seat cushion portion to fit tightly against the sponge pad.

5. The theater chair with a detachable cover according to claim 1, characterized in that: The four first outer positioning sheets are provided and arranged in a square shape, the first hooks are arranged in a square shape at intervals, the four second outer positioning sheets are provided and arranged in a square shape, the second hooks are arranged in a square shape at intervals.

6. The theater chair with a detachable cover according to claim 1, characterized in that: A back shell is installed behind the backrest frame by means of a snap connection.

7. The theater chair with a detachable cover according to claim 6, characterized in that: The back side of the back shell is provided with a mounting hole, and the backrest frame is provided with a locking threaded hole corresponding to the mounting hole. The mounting screw passes through the mounting hole of the back shell and is then connected with the locking threaded hole.

8. The theater chair with a detachable cover according to claim 1, characterized in that: The bottom of the sheet metal frame is mounted with a bottom shell by means of a snap connection.

9. The theater chair with a detachable cover according to claim 1, characterized in that: The sheet metal frame is provided with a transversely extending flip rod, the flip rod is rotatably connected to two seat armrests, and the seat plate is provided with a reset structure for driving the seat plate to flip and reset.

10. The theater chair with a detachable cover according to claim 1, characterized in that: The inner sides of the two seat armrests are provided with rocking mechanisms, and the two sides of the backrest frame are connected to the corresponding rocking mechanisms.

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