Angle-adjustable multimedia projection interaction device

Abstract

The invention provides an angle-adjustable multimedia projection interaction device, and relates to the field of multimedia projection.The angle-adjustable multimedia projection interaction device is characterized in that through a limiting sliding block, the installation position of projection interaction equipment can be detected under the cooperation of the limiting sliding block, and in the fixing process of the projection interaction equipment, when the phenomenon that the fixing position is not accurate occurs, the angle of the projection interaction equipment is adjusted; the rear end of the projection interaction equipment cannot completely touch the limiting sliding block, so that the limiting sliding block cannot completely move backwards, the projection interaction equipment cannot be stably fixed on the mounting base possibly, and the problem that the projection interaction equipment cannot be stably fixed on the mounting base due to the fact that part of operators cannot skillfully master a correct operation process is solved. Or, negligence is caused in the operation process, so that errors are likely to occur in the installation link of the matching mechanism and the device. Once the error occurs, the problem that the fixation between the matching mechanism and the device cannot reach the due standard and the phenomenon that the fixation is not in place occurs is further caused.

Description

Technical Field

[0001] The invention relates to the technical field of multimedia projection, and in particular to a multimedia projection interactive device with adjustable angle. Background Art

[0002] Multimedia projection interactive device is a device that combines projection technology and interactive technology. It is widely used in education, exhibition, entertainment and other fields. In today's era of rapid digital development, multimedia projection interactive device has been widely used in many fields, bringing people a very interesting and interactive experience. In its actual use, in order to ensure that the multimedia projection interactive device can achieve perfect and good interaction with the user, it is often equipped with a special matching mechanism to provide strong auxiliary support.

[0003] However, when connecting the multimedia projection interactive device to the matching mechanism, some unsatisfactory conditions often occur. Since some operators are not proficient in the correct operating procedures, or are careless during the operation, it is very likely that errors will occur in the installation of the matching mechanism and the device. Once this error occurs, it will further lead to the failure of the fixation between the matching mechanism and the device to meet the required standards, resulting in inadequate fixation. In this way, during the subsequent normal use of the device, it is very easy to cause a series of worrying situations such as accidental falling of the device, which will not only cause damage to the device itself, but may even endanger the safety of surrounding personnel, bringing many inconveniences and potential risks to the entire use scenario. Summary of the invention

[0004] The present invention discloses an angle-adjustable multimedia projection interactive device to solve the problem mentioned in the background art that some operators fail to master the correct operation process or are careless during the operation, which may cause errors in the installation of the matching mechanism and the device. Once such an error occurs, it will further lead to the failure of the fixing between the matching mechanism and the device to meet the required standards, resulting in the phenomenon of inadequate fixing.

[0005] The present invention application discloses a multimedia projection interactive device with adjustable angle. Through the cooperation of a limiting slider and a limiting slider, the installation position of the projection interactive device can be detected. In the process of fixing the projection interactive device, if some unexpected situations occur. For example, when the fixed position is inaccurate, the situation becomes more complicated. Due to the inaccurate fixed position, the rear end of the projection interactive device will not completely touch the limiting slider, which makes it impossible for the limiting slider to move completely backward, which may cause the projection interactive device to be unable to be firmly fixed on the mounting base, thereby affecting its subsequent normal use and the presentation of the projection interactive effect.

[0006] The first aspect of the present disclosure provides the purpose and function of an angle-adjustable multimedia projection interactive device, which specifically includes: a fixed base, the fixed base is shaped like a long strip seat structure design, and an adjustment seat in the shape of a rectangular seat is slidably arranged at the bottom of the fixed base; a mounting base is fixedly arranged at the bottom of the adjustment seat; the fixed base includes: a connecting side seat, the connecting side seat is shaped like a rectangular seat structure design, and the number of the connecting side seats is set to six, and the connecting side seats are symmetrically and integrally arranged on both sides of the fixed base; a fixed joint, the fixed joint is shaped like an arc head structure design, and the fixed joint is integrally arranged on the top of the connecting side seat; a fixed side frame, the fixed side frame is integrally arranged on one side of the connecting side seat located at one end of the fixed base; an adjustment motor A, and the adjustment motor A is installed and fixedly arranged inside the fixed side frame.

[0007] As a further solution of the present invention, the fixed base also includes: an adjusting screw, which is rotatably arranged inside the fixed base, and one end of the adjusting screw is transmission-connected to the rotating shaft of the adjusting motor A; a transmission base, which is shaped like a T-shaped structure, and is slidably arranged inside the fixed base; a transmission joint, which is shaped like an arc-shaped head structure, and is integrally arranged on the top of the transmission base; and a threaded connection between the transmission joint and the adjusting screw.

[0008] As a further solution of the present invention, the fixed base also includes: a connecting base, which is shaped like a circular seat structure and is integrally arranged at the bottom of the transmission base; a limit bar, which is integrally arranged on the outside of the connecting base; and an adjustment motor B, which is installed and arranged at the bottom of the transmission base.

[0009] As a further solution of the present invention, the adjustment seat includes: a connecting top seat, which is shaped like a circular seat structure and is fixedly installed on the top of the adjustment seat; a limiting groove, which is shaped like a circular groove structure and is opened on the inner side of the connecting top seat; the limiting groove is rotatably connected to the limiting bar; a transmission seat, which is shaped like a circular seat structure and is fixedly installed in the middle of the top of the adjustment seat; and a fixed connection between the middle of the top of the transmission seat and the bottom of the rotating shaft of the adjustment motor B.

[0010] As a further solution of the present invention, the adjustment seat also includes: a fixed pillar, which is shaped like a circular column structure design, and the number of the fixed pillars is six, and the fixed pillars are arranged in a circular array and are integrally arranged at the bottom of the connecting top seat; the bottom of the fixed pillar is fixedly connected to the top of the adjustment seat; a supporting pillar, which is shaped like a rectangular column structure design, and the number of the supporting pillars is set to four, and the supporting pillars are symmetrically arranged in an integral manner at the bottom of the adjustment seat.

[0011] As a further solution of the present invention, the mounting base includes: a projection interactive device, which is installed on the top of the mounting base; a fixed side seat, which is shaped like a long strip seat structure, and the number of the fixed side seats is set to two, and the fixed side seats are symmetrically fixed on the top of the mounting base; a fixed connection between the top of the fixed side seat and the bottom of the supporting pillar; a limiting slider, which is shaped like a rectangular block structure, and the limiting slider is slidably set at the front end of the fixed side seat; a spring is installed between the fixed side seat and the limiting slider.

[0012] As a further solution of the present invention, the mounting base also includes: a limit head A, which is shaped like a rectangular head structure design, and the limit head A is integrally arranged at the rear end of one side of the limit slider; a connecting head A, which is shaped like an arc-shaped head structure design, and the number of connecting heads A is set to two, and the connecting heads A are symmetrically arranged in an integrated manner at the upper and lower ends of the rear end.

[0013] As a further solution of the present invention, the mounting base also includes: a limiting slider, which is shaped like an L-shaped block structure, and the limiting slider is slidably arranged inside the fixed side seat; a connecting head B, which is shaped like an arc-shaped head structure, and the connecting head B is integrally arranged on one side of the limiting slider; a spring is installed between the connecting head B and the mounting base; a limit head B, which is shaped like a rectangular head structure, and the number of limit heads B is set to two, and the limit heads B are symmetrically arranged in one piece at the rear end of the mounting base.

[0014] The angle-adjustable multimedia projection interactive device provided by the present invention has the following beneficial effects:

[0015] Through the cooperation of the limiting slider and the limiting slider, the installation position of the projection interactive device can be detected, and some unexpected situations may occur during the fixing process of the projection interactive device. For example, when the fixing position is inaccurate. Due to the inaccurate fixing position, the rear end of the projection interactive device will not completely touch the limiting slider, which makes the limiting slider unable to move completely backward. Correspondingly, one end of the limiting slider will not completely break away from the side of the limit head A, but will continue to maintain a certain degree of engagement with the limit head A. In this case, the limiting slider cannot fix the projection interactive device according to the normal process, which may cause the projection interactive device to be unable to be firmly fixed on the mounting base, thereby affecting its subsequent normal use and the presentation of the projection interactive effect.

[0016] By setting the adjustment seat and the mounting base, the angle adjustment operation of the projection interactive device can be facilitated. In order to further meet the specific requirements for the projection angle in different scenes, when the projection interactive device needs to be adjusted, the adjustment motor A can be started, and the transmission base will drive the projection interactive device to move through the adjustment seat and the mounting base, so that the projection interactive device moves to a suitable position. Then, by starting the adjustment motor B, the adjustment motor B will drive the projection interactive device to rotate through the adjustment seat and the mounting base, so that the projection angle of the projection interactive device changes, and then the projection interactive angle of the projection interactive device can be adjusted as needed, so that it can meet different projection angles and meet the needs of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0018] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0019] In the attached picture:

[0020] Figure 1 It is a schematic diagram of the overall axial stereoscopic structure of the angle-adjustable multimedia projection interactive device according to an embodiment of the present invention.

[0021] Figure 2 It is a schematic diagram of the fixed base structure of the angle-adjustable multimedia projection interactive device according to an embodiment of the present invention.

[0022] Figure 3 It is a schematic diagram of the disassembled structure of a fixed base of an angle-adjustable multimedia projection interactive device according to an embodiment of the present invention.

[0023] Figure 4 It is a schematic diagram of the structure of an adjustment base of an angle-adjustable multimedia projection interactive device according to an embodiment of the present invention.

[0024] Figure 5 It is a schematic diagram of the structure of the mounting base of the multimedia projection interactive device with adjustable angle according to an embodiment of the present invention.

[0025] Figure 6 It is a schematic diagram of the disassembled structure of the fixed side seat of the angle-adjustable multimedia projection interaction device of an embodiment of the present invention when the projection interaction device is not fixed.

[0026] Figure 7 It is a schematic diagram of the structure of a limiting slider of an angle-adjustable multimedia projection interactive device according to an embodiment of the present invention.

[0027] Figure 8It is a schematic diagram of the structure of a limiting slider of an angle-adjustable multimedia projection interactive device according to an embodiment of the present invention.

[0028] Reference numerals list

[0029] 1. Fix the base; 101. Connect the side seat; 102. Fix the joint; 103. Fix the side frame; 104. Adjust the motor A; 105. Adjust the screw; 106. Drive base; 107. Drive joint; 108. Connect the base; 109. Limit strip; 110. Adjust the motor B; 2. Adjust the seat; 201. Connect the top seat; 202. Limit groove; 203. Drive seat; 204. Fix the pillar; 205. Support pillar; 3. Install the base; 301. Projection interactive device; 302. Fix the side seat; 303. Limit slider; 304. Limit head A; 305. Connector A; 306. Limit slider; 307. Connector B; 308. Limit head B. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Unless otherwise defined, all terms (including technical and scientific terms) used in the embodiments of the present invention have the same meanings as commonly understood by those of ordinary skill in the art to which the present invention belongs. It should also be understood that terms such as those defined in common dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless the embodiments of the present invention are clearly defined in this way.

[0032] The words "first", "second" and similar words used in the embodiments of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. The words "one", "one" or "the" and similar words do not indicate a quantity limitation, but indicate the existence of at least one. Similarly, the words "include" or "comprise" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. In the following description, the spatial and directional terms such as "upper", "lower", "front", "back", "top", "bottom", "vertical" and "horizontal" may be used to describe the embodiments of the present invention, but it should be understood that these terms are only for the convenience of describing the embodiments shown in the figures, and do not require the actual device to be constructed or operated in a specific orientation. In the following description, the use of terms such as "connect", "couple", "fix" and "attach" may refer to the direct connection between two elements or structures without other elements or structures, or may refer to the indirect connection between two elements or structures through an intermediate element or structure, unless otherwise clearly stated in this article.

[0033] As attached Figure 1 To Attachment Figure 8 As shown:

[0034] Embodiment 1: The present invention proposes an angle-adjustable multimedia projection interactive device, comprising: a fixed base 1, the fixed base 1 is shaped like a long strip seat structure design, and an adjustment seat 2 in the shape of a rectangular seat is slidably arranged at the bottom of the fixed base 1; a mounting base 3 is fixedly arranged at the bottom of the adjustment seat 2; the fixed base 1 comprises: a connecting side seat 101, the connecting side seat 101 is shaped like a rectangular seat structure design, and the number of the connecting side seats 101 is set to six, and the connecting side seats 101 are symmetrically arranged on both sides of the fixed base 1; a fixed joint 102, the fixed joint 102 is shaped like an arc head structure design, and the fixed joint 102 is integrally arranged on the top of the connecting side seat 101; a fixed side frame 103, the fixed side frame 103 is integrally arranged on one side of the connecting side seat 101 located at one end of the fixed base 1; an adjustment motor A104, the adjustment motor A104 is installed and fixedly arranged on the fixed side frame 103 inside; adjusting screw 105, the adjusting screw 105 is rotatably set inside the fixed base 1, and one end of the adjusting screw 105 is transmission-connected with the rotating shaft of the adjusting motor A104; transmission base 106, the transmission base 106 is shaped in a T-shaped structure design, and the transmission base 106 is slidably set inside the fixed base 1; transmission joint 107, the transmission joint 107 is shaped in an arc-shaped head structure design, and the transmission joint 107 is integrally set on the top of the transmission base 106; the transmission joint 107 is threadedly connected to the adjusting screw 105; connecting base 108, the connecting base 108 is shaped in a circular seat structure design, and the connecting base 108 is integrally set at the bottom of the connecting base 106; limiting strip 109, the limiting strip 109 is integrally set on the outside of the connecting base 108; adjusting motor B110, the adjustment motor B110 is installed and set at the bottom of the transmission base 106.

[0035] The adjustment seat 2 includes: a connecting top seat 201, which is designed in the shape of a circular seat structure, and the connecting top seat 201 is fixedly installed on the top of the adjustment seat 2; a limiting groove 202, which is designed in the shape of a circular groove structure, and the limiting groove 202 is opened on the inner side of the connecting top seat 201; the limiting groove 202 is rotatably connected to the limiting strip 109; a transmission seat 203, which is designed in the shape of a circular seat structure, and the transmission seat 203 is fixedly installed in the middle of the top of the adjustment seat 2; the middle of the top of the transmission seat 203 It is fixedly connected to the bottom of the rotating shaft of the adjustment motor B110; the fixed pillar 204 is shaped like a circular column structure, and the number of the fixed pillars 204 is six, and the fixed pillars 204 are arranged in a circular array at the bottom of the connecting top seat 201; the bottom of the fixed pillar 204 is fixedly connected to the top of the adjustment seat 2; the supporting pillar 205 is shaped like a rectangular column structure, and the number of the supporting pillars 205 is set to four, and the supporting pillars 205 are symmetrically arranged at the bottom of the adjustment seat 2.

[0036] Specific usage and function of this embodiment: When the multimedia projection interaction device is used, first, the fixed base 1 is fixed to a suitable position for projection interaction by inserting the fixing screw through the fixing joint 102, and then the projection interaction device 301 is placed inside the mounting base 3. The limiting slider 303 will be moved to the front end of the projection interaction device 301 driven by the spring to fix and restrict the projection interaction device 301, and then projection interaction is performed through the projection interaction device 301.

[0037] When the projection interactive device 301 needs to be adjusted, the adjustment motor A104 can be started, and the adjustment motor A104 will drive the transmission base 106 to move through the adjustment screw 105 and the transmission joint 107, and the transmission base 106 will drive the projection interactive device 301 to move through the adjustment seat 2 and the installation base 3, so that the projection interactive device 301 moves to a suitable position. At this time, the adjustment motor B110 is started, and the adjustment motor B110 will drive the projection interactive device 301 to rotate through the adjustment seat 2 and the installation base 3, so that the projection angle of the projection interactive device 301 changes, and the projection interaction angle of the projection interactive device 301 can be adjusted as needed.

[0038] Embodiment 2, based on embodiment 2, as Figure 5 - Figure 8As shown; this angle-adjustable multimedia projection interactive device includes: a mounting base 3 including: a projection interactive device 301, and the projection interactive device 301 is installed on the top of the mounting base 3; the projection interactive device 301 is an existing mature technology, and can be used by people to perform projection interaction. It is also equipped with highly sensitive interactive sensing devices, which can accurately capture various actions, gestures and other behavioral information of the user. When the user approaches the device and makes corresponding actions, the device can respond quickly and adjust the projected content or effect in real time according to the captured action information, thereby realizing real projection interaction; fixed side seat 302, the shape of the fixed side seat 302 is a long strip seat structure design, and the number of fixed side seats 302 is set to two, and the fixed side seats 302 are symmetrically fixed on the top of the mounting base 3; the top of the fixed side seat 302 is fixedly connected to the bottom of the supporting pillar 205; the limiting slider 303, the shape of the limiting slider 303 is a rectangular block structure design, and the limiting slider 303 is slidably set at the front end of the fixed side seat 302; a spring is installed between the fixed side seat 302 and the limiting slider 303; the limiting head A304, the shape of the limiting head A304 is a rectangular head structure design, and the limiting head A304 It is integrally arranged at the rear end of one side of the limit slider 303; the connecting head A305, the connecting head A305 is shaped like an arc-shaped head structure design, and the number of the connecting head A305 is set to two, and the connecting head A305 is symmetrically arranged at the upper and lower ends of the rear end; the limiting slider 306, the limiting slider 306 is shaped like an L-shaped block structure design, and the limiting slider 306 is slidably arranged inside the fixed side seat 302; the connecting head B307, the connecting head B307 is shaped like an arc-shaped head structure design, and the connecting head B307 is integrally arranged at one side of the limiting slider 306; a spring is installed between the connecting head B307 and the mounting base 3; the limiting head B308, the limiting head B308 is shaped like a rectangular head structure design, and the number of the limiting head B308 is set to two, and the limiting head B308 is symmetrically arranged at the rear end of the mounting base 3.

[0039] The working principle of this embodiment is as follows: when the projection interactive device 301 is fixed to the mounting base 3, the rear end of the projection interactive device 301 will touch the rear end of the limiting slider 306, the limiting slider 306 will move backward, and one end of the limiting slider 306 will be separated from the limiting head A304 on one side of the limiting slider 303. At this time, the restriction of the limiting slider 303 will be released, and the limiting slider 303 will move outward under the drive of the spring, and one end of the limiting slider 303 will move to the front end of the projection interactive device 301 to fix and restrict the projection interactive device 301, thereby completing the fixing operation of the projection interactive device 301. If the fixing position is inaccurate during the fixing process of the projection interactive device 301, the rear end of the projection interactive device 301 will not completely touch the limiting slider 306, resulting in the limiting slider 306 not completely moving backward, one end of the limiting slider 306 not completely separating from the side of the limiting head A304, and one end of the limiting slider 306 will continue to engage with the limiting head A304, so that the limiting slider 303 will not fix the projection interactive device 301.

[0040] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the protection scope of the present invention. The protection scope of the present invention is determined by the appended claims.

Claims

1. An angle-adjustable multimedia projection interactive device, characterized in that: include: A fixed base (1), wherein the fixed base (1) is shaped like a long strip seat structure, and an adjustment base (2) in the shape of a rectangular seat is slidably arranged at the bottom of the fixed base (1); a mounting base (3) is fixedly arranged at the bottom of the adjustment base (2); the fixed base (1) comprises: a connecting side seat (101), wherein the connecting side seat (101) is shaped like a rectangular seat structure, and the number of the connecting side seats (101) is set to six, and the connecting side seats (101) are symmetrically arranged on both sides of the fixed base (1); a fixed joint (102), wherein the fixing joint (102) is shaped like an arc head structure, and the fixing joint (102) is arranged on the top of the connecting side seat (101); a fixed side frame (103), wherein the fixed side frame (103) is arranged on one side of the connecting side seat (101) located at one end of the fixed base (1); and an adjustment motor A (104), wherein the adjustment motor A (104) is installed and fixedly arranged inside the fixed side frame (103).

2. The angle-adjustable multimedia projection interactive device according to claim 1, characterized in that: The fixed base (1) further comprises: an adjusting screw (105), the adjusting screw (105) being rotatably arranged inside the fixed base (1), one end of the adjusting screw (105) being transmission-connected to a rotating shaft of an adjusting motor A (104); a transmission base (106), the transmission base (106) being in a T-shaped structural design, and the transmission base (106) being slidably arranged inside the fixed base (1); a transmission joint (107), the transmission joint (107) being in an arc-shaped head structural design, and the transmission joint (107) being integrally arranged on the top of the transmission base (106); and the transmission joint (107) being threadedly connected to the adjusting screw (105).

3. The angle-adjustable multimedia projection interactive device according to claim 2, characterized in that: The fixed base (1) further comprises: a connecting base (108), the connecting base (108) is designed in a circular seat structure, and the connecting base (108) is integrally arranged at the bottom of the transmission base (106); a limit bar (109), the limit bar (109) is integrally arranged outside the connecting base (108); and an adjustment motor B (110), the adjustment motor B (110) is installed at the lower part of the transmission base (106).

4. The angle-adjustable multimedia projection interactive device according to claim 1, characterized in that: The adjustment seat (2) comprises: a connecting top seat (201), the connecting top seat (201) is designed in the shape of a circular seat structure, and the connecting top seat (201) is fixedly arranged on the top of the adjustment seat (2); a limiting groove (202), the limiting groove (202) is designed in the shape of a circular groove structure, and the limiting groove (202) is arranged on the inner side of the connecting top seat (201); the limiting groove (202) is rotatably connected to the limiting bar (109); a transmission seat (203), the transmission seat (203) is designed in the shape of a circular seat structure, and the transmission seat (203) is fixedly arranged in the middle of the top of the adjustment seat (2); the middle of the top of the transmission seat (203) is fixedly connected to the bottom of the rotating shaft of the adjustment motor B (110).

5. The angle-adjustable multimedia projection interactive device according to claim 4, characterized in that: The adjustment seat (2) further comprises: a fixed support (204), the fixed support (204) being in the shape of a circular column structure, the number of the fixed support (204) being six, the fixed support (204) being in the shape of a ring array and being integrally arranged at the bottom of the connection top seat (201); a fixed connection between the bottom of the fixed support (204) and the top of the adjustment seat (2); and a supporting support (205), the support support (205) being in the shape of a rectangular column structure, the number of the supporting support (205) being four, the supporting support (205) being symmetrically integrally arranged at the bottom of the adjustment seat (2).

6. The angle-adjustable multimedia projection interactive device according to claim 1, characterized in that: The mounting base (3) comprises: a projection interactive device (301), the projection interactive device (301) being mounted on the top of the mounting base (3); a fixed side seat (302), the fixed side seat (302) being shaped like a long strip seat structure, and the number of the fixed side seats (302) is set to two, and the fixed side seats (302) are symmetrically fixedly mounted on the top of the mounting base (3); a fixed connection between the top of the fixed side seat (302) and the bottom of the support pillar (205); a limiting slider (303), the limiting slider (303) being shaped like a rectangular block structure, and the limiting slider (303) being slidably mounted on the front end of the fixed side seat (302); and a spring being mounted between the fixed side seat (302) and the limiting slider (303).

7. The angle-adjustable multimedia projection interactive device according to claim 6, characterized in that: The mounting base (3) further comprises: a limit head A (304), the limit head A (304) is shaped like a rectangular head structure design, and the limit head A (304) is integrally arranged at the rear end of one side of the limit slider (303); a connecting head A (305), the connection head A (305) is shaped like an arc head structure design, and the number of the connecting heads A (305) is set to two, and the connecting heads A (305) are symmetrically integrally arranged at the upper and lower ends of the rear end.

8. The angle-adjustable multimedia projection interactive device according to claim 7, characterized in that: The mounting base (3) further comprises: a limiting slider (306), the limiting slider (306) is shaped like an L-shaped block structure, and the limiting slider (306) is slidably arranged inside the fixed side seat (302); a connecting head B (307), the connecting head B (307) is shaped like an arc-shaped head structure, and the connecting head B (307) is integrally arranged on one side of the limiting slider (306); a spring is installed between the connecting head B (307) and the mounting base (3); a limiting head B (308), the limiting head B (308) is shaped like a rectangular head structure, and the number of the limiting heads B (308) is set to two, and the limiting heads B (308) are symmetrically integrally arranged at the rear end of the mounting base (3).

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