A seat plate rotating structure of an auditorium chair

Abstract

The present invention provides a seat plate rotating structure of an auditorium chair, which belongs to the technical field of auditorium chairs. The seat plate rotating structure of the auditorium chair includes two seat plate frames, a mounting part, and a rotating part. The two seat plate frames in the present invention are respectively connected to the two ends of a seat plate body, and the two rotating parts are respectively rotatably connected to the two ends of the seat plate frames, so as to improve the supporting strength of the seat plate frames. The seat plate frames are eccentrically installed on the rotating parts, and then after the seat plate body is swung to the horizontal, the pressure on the seat plate body is released, and the seat plate frame will move in the vertical direction around the connection between it and the rotating part under the action of its own center of gravity, so as to realize that the seat plate body automatically rebounds without the need for a spring, and the structure is simple and the operation is easy.

Description

Technical Field

[0001] The invention relates to the technical field of auditorium chairs, and in particular to a seat plate rotating structure of an auditorium chair. Background Art

[0002] Auditorium chairs are mostly composed of four parts: a seat, a backrest, an armrest and a footrest, and are suitable for auditoriums, theater halls, lecture halls and other places. However, the two mounting seats at both ends of the existing auditorium chairs are provided with a rotating shaft that runs through the seat plate, a spring is provided on the rotating shaft to make the seat plate rebound, and a damper is provided on the rotating shaft to reduce the speed of the spring rebound. However, the damper of this auditorium chair is easy to break after long-term use, making the seat plate rebound faster and easily pinching the user. At the same time, the spring is easy to be damaged after long-term use, so the seat plate cannot rebound normally, affecting the user's use.

[0003] Chinese patent CN211354404U, published on August 28, 2020, discloses a hydraulic buffer noise reduction row seat, including a base assembly, a flap assembly, and a buffer assembly. The buffer assembly includes a rebound mechanism arranged along the rotating shaft of the row seat seat plate, and a damping mechanism fixed on both sides of the row seat seat plate. The damping mechanism is a bidirectional rotary damper fixed on both sides of the shell, and the center of the bidirectional rotary damper is located on the same reference line as the second square axis. The present invention modifies the technical solution of supporting the traditional row chair with two simple metal brackets on both sides under the seat plate to extend the lower part of the seat plate and use a bidirectional rotary damper to connect with the back of the seat, which plays a role in noise reduction when the seat is retracted and released; and a force-bearing part is installed on the lower plate surface of the row seat plate to strengthen the rigidity of the seat plate. When the seat is put down, the force-bearing part can be pressed together with the hinge, and at the same time play a supporting role, avoiding the noise caused by the deformation of the seat plate. In the above patent, the spring drives the seat plate to rebound, and the spring is easily damaged after long-term use, so the seat plate cannot rebound normally, affecting user use. Summary of the invention

[0004] The purpose of the present invention is to provide a seat plate rotating structure for an auditorium chair in view of the above-mentioned deficiencies in the prior art.

[0005] The present invention proposes a seat rotation structure for an auditorium chair, comprising two seat plate frames respectively connected to the two ends of a seat plate body, a mounting member arranged on one side of the seat plate frame, and a rotating member having one end connected to the mounting member and the other end rotatably connected to one end of the seat plate frame. The mounting members are two respectively arranged on one side of the seat plate frame, the rotating members are two, and the seat plate frame is eccentrically mounted on the rotating member so that the seat plate frame can move to a vertical state under the action of gravity when it is in a horizontal state.

[0006] Furthermore, the two rotating members are arranged in parallel, the center lines of the two rotating members coincide with each other, and the two rotating members are arranged symmetrically.

[0007] Furthermore, the mounting member includes a mounting plate, a fixing structure fixed on the mounting plate, a first mounting groove arranged on the fixing structure, a limiting groove arranged on the first mounting groove, a second mounting groove is arranged on the seat plate frame, and the rotating member includes a rotating rod, a first stop plate arranged at the other end of the rotating rod, and a clamping block arranged on the rotating rod for clamping in the limiting groove when one end of the rotating rod passes through the second mounting groove and is inserted into the first mounting groove.

[0008] Furthermore, the fixing structure includes a first base fixed on the mounting plate, a first fixing groove arranged at the top of the first base, a second base clamped in the first fixing groove, and the first mounting groove is arranged on the second base.

[0009] Furthermore, the fixing structure also includes a first support plate for supporting one end of the second base when the fixing structure abuts against one end of the first base, and a second support plate for supporting the other end of the second base when the fixing structure abuts against the other end of the first base.

[0010] Furthermore, the fixing structure also includes a first limit block, which is respectively connected to the first support plate and the second support plate at both ends to stop the rotating rod from moving in a direction perpendicular to the center line of the first mounting groove when the rotating rod is inserted into the first mounting groove and the clamping block is clamped into the limiting groove. One end of the first limit block is provided with a second stop plate for stopping one end of the clamping block, and the other end is provided with a third stop plate for stopping the other end of the clamping block.

[0011] Furthermore, a first threaded hole is provided at one end of the first base and a second threaded hole is provided at the other end, a first fixing hole is provided on the first support plate, a second fixing hole is provided on the second support plate, a third fixing hole is provided at one end of the first limit block and a fourth fixing hole is provided at the other end, and also includes a first bolt that sequentially passes through the third fixing hole and the first fixing hole and is screwed to the first threaded hole, and a second bolt that sequentially passes through the fourth fixing hole and the second fixing hole and is screwed to the second threaded hole.

[0012] Furthermore, an anti-collision block is provided at one end of the seat plate frame, and a second limiting block is provided at the bottom end of the first base for stopping the anti-collision block when one end of the seat plate frame moves toward a horizontal direction to limit the seat plate frame.

[0013] Furthermore, the mounting plate is provided with a third limiting block for stopping the anti-collision block when one end of the seat plate frame moves in a vertical direction to limit the seat plate frame.

[0014] Furthermore, the second mounting groove is arranged on one side of the center line of the seat frame, and the seat frame includes a balancing end close to the second mounting groove and a pulling end away from the second mounting groove, and also includes a counterweight block detachably mounted on the seat frame, which is used to be arranged at the pulling end when the seat frame is in a horizontal state to drive the pulling end to move downward to make the seat frame in a vertical state, and is arranged at the balancing end when the seat frame is in a horizontal state to increase the weight of one end of the seat frame so that the seat frame remains horizontal.

[0015] The seat plate rotating structure of an auditorium chair of the present invention has the following beneficial effects:

[0016] 1. Two seat frame are respectively connected to the two ends of the seat plate body, and two rotating parts are respectively connected to the two ends of the seat plate frame, so as to improve the support strength of the seat plate frame. The seat plate frame is eccentrically installed on the rotating part. After the seat plate body is swung to the horizontal, the pressure on the seat plate body is released. Then, the seat plate frame will move in the vertical direction around the connection between it and the rotating part under the action of its own center of gravity, so that the seat plate body can automatically rebound without the need for a spring, with a simple structure and easy operation.

[0017] 2. The first base is fixed on the mounting plate, the second base is clamped in the first fixing groove on the first base, one end of the rotating rod passes through the second mounting groove and is plugged into the first mounting groove, and the clamping block is clamped in the limiting groove. When the first support plate abuts against one end of the first base, it supports one end of the second base, and when the second support plate abuts against the other end of the first base, it supports the other end of the second base. The installation is simple and the stability of the rotating rod rotating and connecting the seat plate frame is improved;

[0018] 3. The two ends of the first limit block are respectively connected to the first support plate and the second support plate to stop the rotating rod to prevent the rotating rod from moving in a direction perpendicular to the center line of the first mounting groove. The second stop plate and the third stop plate respectively stop the two ends of the clamping block to improve the stability of the clamping block in the limit groove;

[0019] 4. When the seat frame moves from the vertical direction to the horizontal direction under the action of external force, the second limit block can limit the seat frame to prevent the seat frame from moving beyond the horizontal direction, which is not conducive to the user's use of the seat body. At the same time, the second limit block applies a force opposite to the movement of the seat frame to the seat frame through the anti-collision block, thereby improving the stability of the seat body when in use;

[0020] 5. When the seat frame is in a horizontal setting under the action of external force, after the external force is removed, the seat frame automatically rebounds under the action of its own center of gravity and moves in the vertical direction. The third limit block can apply a force opposite to the movement of the seat frame to the seat frame through the anti-collision block to prevent the seat frame from moving beyond the vertical direction and hitting the user, which is not conducive to the user's use;

[0021] 6. The second mounting groove is arranged on one side of the center line of the seat frame, the balancing end is close to the second mounting groove and the pulling end is far from the second mounting groove. The weight of the part of the seat frame close to the pulling end with the second mounting groove as the dividing line is greater than the weight of the part of the seat frame close to the balancing end. When the seat frame is in a horizontal state and is not subjected to external force, the pulling end and the balancing end of the seat frame cannot maintain balance on the rotating rod, and the pulling end drives the seat frame to move downward. At this time, the counterweight block is installed at the pulling end, which can accelerate the pulling end to drive the seat frame to move downward until the seat frame is in a vertical state. When the seat frame is in a horizontal state, the counterweight block is installed at the balancing end to increase the weight of the balancing end, so that the pulling end and the balancing end of the seat frame are balanced, thereby keeping the seat frame horizontal and the seat body horizontal, which is convenient for users to use the seat body. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated into the specification and constitute a part of the specification, illustrate embodiments of the present invention and are used together with the description to explain the principles of the present invention. In these drawings, similar reference numerals are used to represent similar elements. The drawings described below are some embodiments of the present invention, but not all embodiments. For those of ordinary skill in the art, other drawings can be obtained from these drawings without paying creative work.

[0023] Figure 1 It is a structural schematic diagram of a first limit block in a seat plate rotating structure of an auditorium chair according to an embodiment of the present invention when both ends of the first limit block are not connected to the first support plate and the second support plate;

[0024] Figure 2 It is a structural schematic diagram of a seat plate rotating structure of an auditorium chair in an embodiment of the present invention, in which a first base is arranged on a mounting plate, a second base is arranged on the first base, and a first limit block is arranged on the second base;

[0025] Figure 3 It is a structural schematic diagram of a first base in a seat plate rotating structure of an auditorium chair according to an embodiment of the present invention when it is arranged on a mounting plate;

[0026] Figure 4 It is a structural schematic diagram of a seat plate rotating structure of an auditorium chair in an embodiment of the present invention, in which a first base is arranged on a mounting plate and a second base is arranged on the first base;

[0027] Figure 5 It is a structural schematic diagram of a seat plate rotating structure of an auditorium chair according to an embodiment of the present invention;

[0028] Figure 6 The present invention is a side view of a seat frame in a seat rotation structure of an auditorium chair according to an embodiment of the present invention.

[0029] In the figure: 1-seat plate frame, 11-anti-collision block, 12-second mounting groove, 13-pulling end, 14-balancing end, 2-mounting plate, 21-third limiting block, 31-first base, 311-first fixing groove, 312-first threaded hole, 313-second threaded hole, 32-second base, 321-first mounting groove, 322-limiting groove, 33-first support plate, 331-first fixing hole, 34-second support plate, 341-second fixing hole, 35-first limiting block, 351-second stop plate, 352-third fixing hole, 353-fourth fixing hole, 36-second limiting block, 41-rotating rod, 42-first stop plate, 43-clamping block, 51-first magnet, 52-second magnet, 53-third magnet. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other arbitrarily without conflict.

[0031] See also Figures 1 to 6 The seat rotation structure of the auditorium chair in the embodiment of the present invention comprises two seat frame 1 respectively connected to the two ends of the seat body, a mounting member arranged on one side of the seat frame 1, a rotating member having one end connected to the mounting member and the other end rotatably connected to one end of the seat frame 1, two mounting members respectively arranged on one side of the seat frame 1, two rotating members, and the center of gravity of the seat frame 1 is located at the lower end of the rotating member when the seat frame 1 is arranged vertically.

[0032] Here, two seat frame 1 are respectively connected to the two ends of the seat plate body, and two rotating parts are respectively connected to the two ends of the seat plate frame 1 in rotation, so as to improve the support strength of the seat plate frame 1. When the seat plate is set vertically, the center of gravity of the seat plate body is located at the lower end of the rotating part. After the seat plate body is swung to the horizontal, the pressure on the seat plate body is released, and the seat plate frame 1 will move in the vertical direction around the connection with the rotating part under the action of its own center of gravity, so that the seat plate body can automatically rebound without the need for a spring, with a simple structure and easy operation. The two ends of the seat plate body can be fixed to the two seat plate frames 1 by screws, and a seat cushion can be sleeved on the periphery of the seat plate body.

[0033] The two rotating members can be arranged in parallel, the center lines of the two rotating members coincide, and the two rotating members are arranged symmetrically, so as to facilitate the stable installation of the seat frame 1.

[0034] The mounting member may include a mounting plate 2, a fixing structure fixed on the mounting plate 2, a first mounting groove 321 provided on the fixing structure, a limiting groove 322 provided on the first mounting groove 321, a second mounting groove 12 provided on the seat plate frame 1, and a rotating member including a rotating rod 41, a first stop plate 42 provided at the other end of the rotating rod 41, and a clamping block 43 provided on the rotating rod 41 for clamping in the limiting groove 322 when one end of the rotating rod 41 passes through the second mounting groove 12 and is inserted into the first mounting groove 321. The mounting plate 2 may be perpendicular to the rotating rod 41.

[0035] The fixing structure may include a first base 31 fixed on the mounting plate 2, a first fixing groove 311 arranged at the top of the first base 31, a second base 32 clamped to the first fixing groove 311, and a first mounting groove 321 arranged on the second base 32, which is easy to install and improves the stability of the rotating rod 41 rotating and connecting the seat frame 1. The first base 31 can be fixed to the rear end of the mounting plate 2 by screws, so that the rotating rod 41 is located at the rear end of the mounting plate 2, and the center of gravity of the seat body is located at the rear end of the seat body. When the user presses the front end of the seat body, the seat body is horizontally arranged, which is convenient for the user to sit on the seat body. After the user's force is removed from the seat body, the seat body moves in the vertical direction under the action of its own center of gravity.

[0036] The fixing structure may further include a first support plate 33 for supporting one end of the second base 32 when the first support plate 33 abuts against one end of the first base 31 , and a second support plate 34 for supporting the other end of the second base 32 when the second support plate 34 abuts against the other end of the first base 31 .

[0037] The fixing structure may also include a first limit block 35 which is respectively connected to the first support plate 33 and the second support plate 34 at both ends to stop the rotating rod 41 from moving in a direction perpendicular to the center line of the first mounting groove 321 when the rotating rod 41 is inserted into the first mounting groove 321 and the clamping block 43 is clamped into the limiting groove 322. The rotating rod 41 can be a cylindrical rotating rod 41, the clamping block 43 can be an annular clamping block 43, the first mounting groove 321 can be a semi-cylindrical mounting groove, the first fixing groove 311 can be a semi-cylindrical fixing groove, the limiting groove 322 can be a semi-cylindrical limiting groove 322, the first base 31 can include a first cylindrical base, a first bottom plate fixed to one end of the first cylindrical base, and a second bottom plate fixed to the other end of the second cylindrical base. The second base 32 is a cylindrical base. The first support plate 33 and the second support plate 34 can be symmetrically arranged. The first support plate 33, the second base 32, and the second support plate 34 are integrally formed. The first support plate 33 can be arranged on the first bottom plate, and the second support plate 34 can be arranged on the second bottom plate. The area of ​​the first support plate 33 is equal to the area of ​​the first bottom plate, and the area of ​​the second support plate 34 is equal to the area of ​​the second bottom plate.

[0038] One end of the first limiting block 35 may be provided with a second stopping plate 351 for stopping one end of the clamping block 43 , and the other end may be provided with a third stopping plate for stopping the other end of the clamping block 43 , thereby improving the stability of the clamping block 43 being clamped in the limiting groove 322 .

[0039] The first base 31 may be provided with a first threaded hole 312 at one end and a second threaded hole 313 at the other end, the first support plate 33 may be provided with a first fixing hole 331, and the second support plate 34 may be provided with a second fixing hole 341. The first limit block 35 may be provided with a third fixing hole 352 at one end and a fourth fixing hole 353 at the other end, and further include a first bolt which sequentially passes through the third fixing hole 352 and the first fixing hole 331 and is screwed to the first threaded hole 312, and a second bolt which sequentially passes through the fourth fixing hole 353 and the second fixing hole 341 and is screwed to the second threaded hole 313, so as to improve the installation stability of the first base 31 and the second base 32.

[0040] An anti-collision block 11 is provided at one end of the seat frame 1, and a second limit block 36 is provided at the bottom end of the first base 31 to stop the anti-collision block 11 when one end of the seat frame 1 moves toward the horizontal direction to limit the seat frame 1. When the seat frame 1 is subjected to an external force, the seat frame 1 moves from the vertical direction to the horizontal direction, and the second limit block 36 can limit the seat frame 1, thereby preventing the seat frame 1 from moving beyond the horizontal direction, which is not conducive to the user's use of the seat body. At the same time, the second limit block 36 applies a force opposite to the movement of the seat frame 1 to the seat frame 1 through the anti-collision block 11, thereby improving the stability of the seat body when in use. The anti-collision block 11 can be set in the middle of one end of the seat frame 1.

[0041] The mounting plate 2 is provided with a third limit block 21 for stopping the anti-collision block 11 when one end of the seat frame 1 moves in the vertical direction to limit the seat frame 1. When the seat frame 1 is in a horizontal setting under the action of an external force, after the external force is removed, the seat frame 1 automatically rebounds under the action of its own center of gravity and moves in the vertical direction. The third limit block 21 can apply a force opposite to the movement of the seat frame 1 to the seat frame 1 through the anti-collision block 11, so as to prevent the seat frame 1 from moving beyond the vertical direction and hitting the user, which is not conducive to the user's use. The anti-collision block 11 can be a rubber anti-collision block 11.

[0042] The second mounting groove 12 can be arranged on one side of the center line of the seat frame 1. The seat frame 1 includes a balancing end 14 close to the second mounting groove 12 and a pulling end 13 away from the second mounting groove 12. It also includes a counterweight block detachably mounted on the seat frame 1, which is arranged on the pulling end 13 when the seat frame 1 is in a horizontal state to drive the pulling end 13 to move downward to make the seat frame in a vertical state, and is arranged on the balancing end 14 when the seat frame 1 is in a horizontal state to increase the weight of one end of the seat frame 1 so that the seat frame 1 remains horizontal. The second mounting groove 12 is arranged on one side of the center line of the seat plate frame, the balancing end 14 is close to the second mounting groove 12, and the pulling end 13 is far away from the second mounting groove 12. Then, the weight of the part of the seat plate frame close to the pulling end 13 with the second mounting groove 12 as the dividing line is greater than the weight of the seat plate frame close to the balancing end 14. Then, when the seat plate frame is in a horizontal state and is not subjected to external force, the pulling end 13 and the balancing end 14 of the seat plate frame cannot maintain balance on the rotating rod, and the pulling end 13 drives the seat plate frame to move downward. At this time, the counterweight block is installed on the pulling end 13, which can accelerate the pulling end 13 to drive the seat plate frame to move downward until the seat plate frame is in a vertical state. When the seat plate frame is in a horizontal state, the counterweight block is installed on the balancing end 14 to increase the weight of the balancing end 14, so that the pulling end 13 and the balancing end 14 of the seat plate frame are balanced, thereby keeping the seat plate frame horizontal and the seat plate body horizontal, which is convenient for users to use the seat plate body. The counterweight block may include a first magnet 51 arranged on the pulling end 13 of the seat plate frame 1, a second magnet 52 arranged on the balancing end 14 of the seat plate frame 1, and a third magnet 53 for increasing the weight of the pulling end 13 when adsorbed on the first magnet 51 and increasing the weight of the balancing end 14 when adsorbed on the second magnet 52. The weights of the first magnet 51 and the second magnet 52 are equal. The third magnet 53 may be a plurality of permanent magnets. The descending speed of the seat plate frame 1 is controlled according to actual needs to adjust the number of the third magnets 53 respectively installed at the bottom ends of the first magnet 51 and the second magnet 52. When it is necessary to speed up the descending speed of the seat plate frame 1, the number of the third magnets 53 at the bottom end of the first magnet 51 can be much larger than the number of the third magnets 53 at the bottom end of the second magnet 52. When it is necessary to slow down the descending speed of the seat plate frame 1, the number of the third magnets 53 at the bottom end of the first magnet 51 can be less than or equal to the number of the third magnets 53 at the bottom end of the second magnet 52.

[0043] The contents described above may be implemented individually or in combination in various ways, and these variations are all within the protection scope of the present invention.

[0044] It should be noted that in the description of the present application, it should be noted that the terms "upper end", "lower end" and "bottom end" indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device comprising the elements.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A seat plate rotating structure of an auditorium chair, characterized in that: The invention comprises two seat plate frames (1) respectively connected to the two ends of the seat plate body, a mounting member arranged on one side of the seat plate frame (1), and a rotating member having one end connected to the mounting member and the other end rotatably connected to one end of the seat plate frame (1), wherein the mounting members are two respectively arranged on one side of the seat plate frame (1), the rotating members are two, the seat plate frame (1) is eccentrically mounted on the rotating member so that the seat plate frame (1) can move to a vertical state under the action of gravity when it is in a horizontal state; the mounting member comprises a mounting plate (2), a fixing structure fixed on the mounting plate (2), a first mounting groove (321) arranged on the fixing structure, and a limiting groove (322) arranged on the first mounting groove (321). ), the seat plate frame (1) is provided with a second mounting groove (12), the rotating member comprises a rotating rod (41), a first stop plate (42) arranged at the other end of the rotating rod (41), and a clamping block (43) arranged on the rotating rod (41) and used to be clamped in the limiting groove (322) when one end of the rotating rod (41) passes through the second mounting groove (12) and is inserted into the first mounting groove (321); the fixing structure comprises a first base (31) fixed on the mounting plate (2), a first fixing groove (311) arranged at the top end of the first base (31), and a second base (32) clamped in the first fixing groove (311), the first mounting groove (321) being arranged at The fixing structure further comprises a first support plate (33) for supporting one end of the second base (32) when the first support plate (33) abuts against one end of the first base (31), and a second support plate (34) for supporting the other end of the second base (32) when the first support plate (34) abuts against the other end of the first base (31); the fixing structure further comprises a first stop block (35) for connecting the first support plate (33) and the second support plate (34) at both ends to prevent the rotating rod (41) from moving in a direction perpendicular to the center line of the first mounting groove (321) when the rotating rod (41) is inserted into the first mounting groove (321) and the clamping block (43) is clamped into the stop groove (322). ), a second stop plate (351) for stopping one end of the clamping block (43) is provided at one end of the first limit block (35), and a third stop plate for stopping the other end of the clamping block (43) is provided at the other end; an anti-collision block (11) is provided at one end of the seat plate frame (1), and a second stop block (36) is provided at the bottom end of the first base (31) for stopping the anti-collision block (11) when one end of the seat plate frame (1) moves toward a horizontal direction to limit the seat plate frame (1); a third stop block (21) is provided on the mounting plate (2) for stopping the anti-collision block (11) when one end of the seat plate frame (1) moves toward a vertical direction to limit the seat plate frame (1);The second mounting groove (12) is arranged on one side of the center line of the seat plate frame (1), and the seat plate frame (1) comprises a balancing end (14) close to the first mounting groove (321), a pulling end (13) away from the second mounting groove (12), and also comprises a counterweight block which is detachably mounted on the seat plate frame (1), and is arranged on the pulling end (13) when the seat plate frame (1) is in a horizontal state to drive the pulling end (13) to move downward to make the seat plate frame in a vertical state, and is arranged on the balancing end (14) when the seat plate frame (1) is in a horizontal state to increase the weight of one end of the seat plate frame (1) so that the seat plate frame (1) remains horizontal. ; 2. The seat plate rotating structure of an auditorium chair as claimed in claim 1, characterized in that: The two rotating members are arranged in parallel, the center lines of the two rotating members coincide with each other, and the two rotating members are arranged symmetrically.

3. The seat plate rotating structure of an auditorium chair as claimed in claim 1, characterized in that: The first base (31) is provided with a first threaded hole (312) at one end and a second threaded hole (313) at the other end; the first support plate (33) is provided with a first fixing hole (331); the second support plate (34) is provided with a second fixing hole (341); the first limit block (35) is provided with a third fixing hole (352) at one end and a fourth fixing hole (353) at the other end; and further comprises a first bolt which is sequentially passed through the third fixing hole (352) and the first fixing hole (331) and is screwed to the first threaded hole (312); and a second bolt which is sequentially passed through the fourth fixing hole (353) and the second fixing hole (341) and is screwed to the second threaded hole (313).

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