Movable canopy unit

Abstract

The utility model relates to the technical field of canopies, in particular to a movable canopy unit which comprises a fixing frame, the fixing frame is installed on one side of a wall, an installation column is installed on the outer side of the wall, one end of the bottom face of the fixing frame is installed on the top face of the installation column, and the end, close to the installation column, of the fixing frame is rotationally connected with a movable frame. A supporting frame is installed at the top of the fixed frame, a telescopic driving piece is hinged to the bottom of the supporting frame, the bottom of the telescopic driving piece is hinged to the middle of the movable frame, and the situation that the canopy occupies much outdoor space when not used can be reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of rain sheds, in particular to a movable rain shed unit. BACKGROUND

[0002] When a door is opened on an outer wall of a building, a rain shed is usually arranged above the door. The rain shed is a common building facility and is mainly used for shielding rain and sunlight and protecting the area of a building entrance, a window or a balcony. The main function of the rain shed is to shield wind and rain and reduce the situation that rain is blown into the room by the wind, so as to avoid the rain from floating into the building.

[0003] At present, a large-span hard rain shed arranged at the entrance of a factory has a large overhanging span and strong wind resistance. The rain shed is usually fixedly connected with the building, so that the connection stability between the rain shed and the building is stronger. However, the overhanging length of the rain shed is large, and a large outdoor space is occupied. When products need to be transported, the rain shed blocks the vehicle for transportation at the outer end, so that the distance of transporting the products from the door to the vehicle is long, and the product carrying is inconvenient. SUMMARY

[0004] In order to reduce the situation that the rain shed occupies a large outdoor space when not in use, the application provides a movable rain shed unit.

[0005] The application provides a movable rain shed unit, which adopts the following technical scheme:

[0006] The movable rain shed unit comprises a fixing frame, the fixing frame is installed on one side of a wall, an installation column is installed on the outer side of the wall, one end of the bottom surface of the fixing frame is installed on the top surface of the installation column, one end of the fixing frame close to the installation column is rotationally connected with a moving frame, a support frame is installed on the top of the fixing frame, a telescopic driving piece is hingedly connected to the bottom of the support frame, and the bottom of the telescopic driving piece is hingedly connected to the middle of the moving frame.

[0007] When the moving frame has an influence on the occupied outdoor space, the telescopic driving piece is started, the telescopic driving piece exerts an upward force on the moving frame, so that the moving frame rotates upward along the rotating shaft, the user can determine the angle of rotation of the moving frame according to the specific situation, the moving frame is rotated to the top of the fixing frame, the moving frame occupies the space of the upward part of the fixing frame, so that the situation that the moving frame extends outward for a long time and occupies a large outdoor space is reduced, and the situation that the moving frame has an influence on the occupied outdoor space is reduced.

[0008] Preferably, a first connecting seat is arranged on the top surface of the fixed frame near one end of the moving frame, a second connecting seat is arranged on the top surface of the moving frame near one end of the fixed frame, one end of the second connecting seat is movably inserted into the first connecting seat, a rotating shaft is arranged at one end of the first connecting seat, and the rotating shaft is movably arranged through the side wall of the first connecting seat and the side wall of the second connecting seat.

[0009] By adopting the above technical scheme, the first connecting seat is arranged on the top surface of the fixed frame, the second connecting seat is arranged on the top surface of the moving frame, and the first connecting seat and the second connecting seat are rotationally connected through the rotating shaft, so that the fixed frame and the moving frame are rotationally connected, and the moving frame can rotate along the rotating shaft.

[0010] Preferably, a cross beam is arranged on the top surface of the mounting column, the fixed frame comprises a fixed column and a stabilizing column, one end of the bottom surface of the fixed column is connected to the top surface of the cross beam, the other end of the fixed column is fixed to the outer side of the wall, the fixed column has a plurality of fixed columns, and the plurality of fixed columns are arranged along the length direction of the cross beam, and the stabilizing column is fixed between the plurality of fixed columns.

[0011] By adopting the above technical scheme, under the action of the stabilizing column, the stabilizing column can support the plurality of fixed columns, and the structural stability of the plurality of fixed columns is improved. When the fixed column is subjected to an external force, the stabilizing column uniformly transmits the external force to other fixed columns. Compared with the case that the external force is applied to one fixed column, the application can reduce the deformation and instability of the fixed column under stress.

[0012] Preferably, the moving frame comprises a rotating column and a connecting column, the length extension direction of the rotating column is parallel to the length extension direction of the fixed column, the rotating column has a plurality of rotating columns, the plurality of rotating columns correspond to the plurality of fixed columns one by one, one side of the rotating column abuts against the outer side of the fixed column, and the connecting column is connected between the plurality of rotating columns.

[0013] By adopting the above technical scheme, under the action of the connecting column, the connecting column supports the plurality of rotating columns, and the deformation and instability of the rotating column under stress can be reduced.

[0014] Preferably, a support assembly is arranged between the fixed frame and the moving frame, and the support assembly is used for supporting the moving frame.

[0015] By adopting the above technical scheme, under the action of the support assembly, the moving frame can be supported, so that the damage and fracture of the connecting assembly caused by the large load borne by the connecting assembly can be reduced.

[0016] Preferably, the support assembly comprises a support rod and a pressure driving element, the pressure driving element is installed on the top surface of the fixed column, the output end of the pressure driving element is movably inserted into the cavity of the fixed column, one end of the support rod is slidably connected in the cavity of the fixed column, a moving groove is formed on the side of the rotating column close to the fixed column, the moving groove is arranged along the vertical direction of the rotating column, a connecting rod is slidably connected in the rotating column, the connecting rod is located in the moving groove, and the end of the support rod away from the fixed column is hingedly connected with the connecting rod.

[0017] By using the above technical scheme, when the moving frame is rotated upwards, the connecting rod pulls the support rod to move outward, at the same time, the connecting rod moves downward along the moving groove, so that during the outward movement of the support rod, the other end of the support rod is located in the moving groove, and the rotation is linear motion, so that the end of the support rod moves downward along the moving groove, when the moving frame is rotated to a corresponding angle and the part of the moving frame extending outside the room does not affect the use of the outdoor space, the moving frame stops rotating, at this time, the pressure driving element is started, the output end of the pressure driving element abuts against the top surface of the support rod, so that the support rod can support the moving frame.

[0018] Preferably, the top surface of the support rod is provided with abutting holes, the output end of the pressure driving element is aligned with the abutting holes, the abutting holes are a plurality of, and the plurality of abutting holes are distributed along the long side direction of the support rod.

[0019] By using the above technical scheme, under the action of the abutting holes, the pressure driving element is started, the output end of the pressure driving element is inserted into the abutting hole, the abutting hole limits the output end of the pressure driving element, and the sliding of the output end of the pressure driving element is reduced, so that the support rod is better abutted.

[0020] Preferably, the support rod comprises a moving part and a rotating part, the moving part is movably inserted into the cavity of the fixed column, one end of the rotating part is rotatably connected with the moving part close to the end of the rotating column, and the other end of the rotating part is hingedly connected with the connecting rod.

[0021] By using the above technical scheme, when the moving frame needs to be rotated by a large angle, the moving frame continues to rotate, the rotating part moves to the bottom end of the moving groove, at this time, the moving part moves to the outside of the fixed column, so that the connecting part of the rotating part and the moving part is located outside the fixed column, then during the continuous rotation of the moving frame, the rotating part is driven to rotate upwards, at the same time, the top end of the rotating part moves along the upper side of the moving groove until the rotation of the moving frame stops, so that when the moving frame is rotated by a large angle, the support assembly can continuously support the moving frame.

[0022] In summary, the present application has at least one of the following beneficial technical effects:

[0023] 1、When the mobile frame affects the occupied outdoor space, the telescopic drive is started, the telescopic drive exerts an upward force on the mobile frame, so that the mobile frame rotates upward along the rotating shaft, the user can determine the angle of rotation of the mobile frame according to the specific situation, and rotate the mobile frame to the top of the fixed frame, so that the mobile frame occupies the upward part of the fixed frame, thereby reducing the case that the mobile frame extends out of the outdoor space for a long time and occupies more outdoor space, and further reducing the case that the mobile frame affects the occupied outdoor space.

[0024] 2、When the mobile frame rotates upward, the connecting rod pulls the support rod to move outward, at the same time, the connecting rod moves downward along the moving groove, so that the support rod moves outward, and the other end of the support rod is located in the moving groove during the movement of the support rod, the rotation is linear motion, so that one end of the support rod moves downward along the moving groove, when the mobile frame is rotated to a corresponding angle, the part of the mobile frame extending out of the outdoor space can not affect the use of the outdoor space, the mobile frame stops rotating, at this time, the pressure drive is started, the output end of the pressure drive abuts against the top surface of the support rod, so that the support rod can support the mobile frame. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a schematic diagram of the overall structure of the embodiment of the application.

[0026] Figure 2 is a schematic diagram of the mobile frame rotating upward in the embodiment of the application.

[0027] Figure 3 is Figure 2 partial cross-sectional view of the state.

[0028] Figure 4 is a schematic diagram of the mobile frame rotating 90° in the embodiment of the application.

[0029] BRIEF DESCRIPTION OF DRAWINGS 11, wall; 12, mounting column; 13, cross beam; 14, first reinforcing rib; 2, fixed frame; 21, fixed column; 22, stabilizing column; 3, mobile frame; 31, rotating column; 32, connecting column; 4, connecting assembly; 41, first connecting seat; 42, second connecting seat; 43, rotating shaft; 5, support frame; 51, mounting frame; 52, support column; 53, second reinforcing rib; 6, hydraulic telescopic rod; 7, support assembly; 71, moving part; 72, rotating part; 73, sliding block; 74, moving groove; 75, connecting rod; 76, hydraulic cylinder. DETAILED DESCRIPTION

[0030] The following will be described in detail in combination with the accompanying Figures 1-4 The application will be further described in detail.

[0031] The embodiment of the application discloses a movable rain shelter unit.

[0032] Refer toFigure 1 A movable canopy unit includes mounting columns 12, which are located on the outer side of a wall 11. The number of mounting columns 12 depends on the specific situation. In this embodiment, there are two mounting columns 12, which are arranged parallel to each other and located at both ends of the wall 11. A crossbeam 13 is welded between the top surfaces of the two mounting columns 12. The crossbeam 13 is an I-beam, and its long side is parallel to the wide side of the wall 11. A frame assembly is provided on the top surface of the crossbeam 13, and a canopy (not shown in the attached drawings) is provided on the frame assembly. The canopy is used to block rain, and the frame assembly can support the canopy.

[0033] The frame assembly includes a fixing frame 2, which includes fixing columns 21 and stabilizing columns 22. One end of the bottom surface of the fixing column 21 is welded to the top surface of the crossbeam 13, and the other end of the fixing column 21 is fixed to the outer side of the wall 11. The long side of the fixing column 21 is perpendicular to the long side of the crossbeam 13. There are multiple fixing columns 21, which are evenly distributed along the long side of the crossbeam 13. The stabilizing columns 22 are fixed between the multiple fixing columns 21 and pass through multiple fixing columns 21. The long side of the stabilizing column 22 is perpendicular to the long side of the fixing column 21. The number of stabilizing columns 22 is... Depending on the specific circumstances, in this embodiment of the application, there are two stabilizing columns 22, which are distributed at both ends of the fixed column 21. Under the action of the stabilizing columns 22, the stabilizing columns 22 can support multiple fixed columns 21, thereby improving the structural stability of multiple fixed columns 21. When a fixed column 21 is subjected to a force on one side, the stabilizing column 22 will evenly transfer the force to the other fixed columns 21. Compared with the case where the force is applied to a fixed column 21, this application can reduce the situation where the fixed column 21 is more prone to deformation and swaying.

[0034] Reference Figure 1 and Figure 2 Multiple mounting brackets 2 are respectively fixed with first reinforcing ribs 14 on the bottom surface near the wall 11. The side wall of the first reinforcing rib 14 is fixed to the wall 11 by bolts. Under the action of the first reinforcing rib 14, the first reinforcing rib 14 can support the mounting bracket 2, increase the contact area between it and the wall 11, improve the connection stability between the mounting bracket 2 and the wall 11, and reduce the possibility of breakage in the connection between the mounting bracket 2 and the stabilizer.

[0035] The skeleton assembly further comprises a moving frame 3 arranged at the end of the fixed frame 2 away from the wall 11, the moving frame 3 comprises rotating columns 31 and connecting columns 32, the long edge extension direction of the rotating columns 31 is parallel to the long edge extension direction of the fixed columns 21, the number of the rotating columns 31 is adapted to the number of the fixed columns 21, a one-to-one correspondence exists between the rotating columns 31 and the fixed columns 21, the rotating columns 31 abut the outer side of the fixed columns 21 on one side, the side surface of the rotating columns 31 is in the shape of a right trapezoid, the top surface of the rotating columns 31 is on the same horizontal plane as the top surface of the fixed columns 21, the bottom surface of the rotating columns 31 is arranged obliquely, the bottom surface of the rotating columns 31 is inclined upward away from the end of the fixed columns 21, the thickness of the end of the rotating columns 31 close to the fixed columns 21 is greater than the thickness of the end of the rotating columns 31 away from the fixed columns 21, so that the contact area between the rotating columns 31 and the fixed columns 21 is large, the connection stability between the rotating columns 31 and the fixed columns 21 is improved, and the thickness of the outer end of the rotating columns 31 is small, thereby reducing the overall weight.

[0036] The connecting columns 32 are fixed between the rotating columns 31, the connecting mode between the connecting columns 32 and the rotating columns 31 is consistent with the connecting mode between the fixed columns 21 and the stabilizing columns 22, in the embodiment of the application, the connecting mode is not described in detail, the connecting columns 32 are multiple, the multiple connecting columns 32 are uniformly distributed along the long edge direction of the rotating columns 31, and the stabilizing columns 22 close to each other abut the side walls of the connecting columns 32.

[0037] Referring to Figure 2 and Figure 3 , the fixed frame 2 and the moving frame 3 are provided with connecting assemblies 4, the fixed frame 2 and the moving frame 3 are connected through the connecting assemblies 4, the connecting assemblies 4 comprise first connecting seats 41, second connecting seats 42 and rotating shafts 43, the bottom surface of the first connecting seats 41 is fixed on the top surface of the stabilizing columns 22 close to the rotating columns 31, the bottom surface of the second connecting seats 42 is fixed on the top surface of the connecting seats close to the fixed seats, one end of the second connecting seats 42 is movably inserted into the first connecting seats 41, one end of the rotating shafts 43 is movably inserted through the side walls of the first connecting seats 41 and the second connecting seats 42, the first connecting seats 41 and the second connecting seats 42 are rotatably connected through the rotating shafts 43, so that the fixed frame 2 and the moving frame 3 are rotatably connected, the connecting assemblies 4 are multiple, the multiple connecting assemblies 4 are distributed along the long edge direction of the stabilizing seats, so that the connection stability between the fixed frame 2 and the moving frame 3 can be further improved.

[0038] The top of the fixing frame 2 is provided with a support frame 5, which comprises a mounting frame 51 and a support column 52. One end of the top of the mounting frame 51 is fixed to the outer side of the wall 11, and the mounting frame 51 and the outer side of the wall 11 form a "L" shaped structure after assembly. An installation cavity is formed between the mounting frame 51 and the wall 11, and the support column 52 is located in the installation cavity. One end of the support column 52 is fixed to the outer side of the wall 11, and the other end of the support column 52 is welded with a mounting plate. One side of the mounting plate abuts against the inner wall of the mounting frame 51, and the mounting plate and the mounting frame 51 are fixed by bolts. There are a plurality of support columns 52, which are evenly distributed along the long side direction of the mounting frame 51. The bottom surface of each support column 52 is fixed with a second reinforcing rib 53, and the other side of the second reinforcing rib 53 is fixed to the wall 11 by bolts. Under the action of the second reinforcing rib 53, the structural stability of the support column 52 can be improved, the contact area between the support column 52 and the wall 11 can be increased, the connection stability between the support column 52 and the wall 11 can be improved, and the deformation of the support column 52 caused by the large force borne by the support column 52 can be reduced.

[0039] Referring to Figure 1 and Figure 2 The bottom surface of the support column 52 is provided with a telescopic driving member. In the embodiment of the application, the telescopic driving member is a hydraulic telescopic rod 6. The top of the hydraulic telescopic rod 6 is hinged to the bottom surface of the support column 52, and the bottom of the hydraulic telescopic rod 6 is hinged to the top surface of the connecting column 32 located in the middle. There are a plurality of hydraulic telescopic rods 6, which are respectively arranged at the bottom of the plurality of support columns 52.

[0040] When the moving frame 3 affects the occupied outdoor space, the plurality of hydraulic telescopic rods 6 are started to simultaneously exert an upward force on the moving frame 3, so that the moving frame 3 rotates upward along the rotating shaft 43. The user can determine the angle of rotation of the moving frame 3 according to the specific situation, and rotate the moving frame 3 to the top of the fixing frame 2, so that the moving frame 3 occupies the space of the upper part of the fixing frame 2, thereby reducing the case that the moving frame 3 extends out of the outdoor space for a long time and occupies a large outdoor space, and further reducing the case that the moving frame 3 affects the occupied outdoor space.

[0041] Referring to Figure 2 and Figure 3The support assembly 7 is arranged between the fixed frame 2 and the moving frame 3, and comprises a support rod, which comprises a moving part 71 and a rotating part 72. The moving part 71 is movably inserted into a cavity at one end of the fixed column 21 close to the rotating column 31. The long side of the moving part 71 is parallel to the long side of the fixed column 21, and the moving part 71 can move along the long side direction of the fixed column 21. The moving part 71 is provided with a sliding block 73 on each side. Correspondingly, the inner wall of the fixed frame 2 is provided with a sliding groove on each side, and the long side of the sliding groove is parallel to the long side of the fixed column 21. The two sliding blocks 73 are movably inserted into the sliding grooves close to them. The sliding block 73 can move along the long side direction of the sliding groove. Under the action of the sliding block 73 and the sliding groove, the moving part 71 can be guided to move, so that the movement of the moving part 71 is more stable, and the shaking of the moving part 71 during movement is reduced. The rotating part 72 is rotatably connected to one end of the moving part 71 close to the rotating column 31, and the rotating part 72 is movably inserted into the cavity of the fixed frame 2.

[0042] The rotating column 31 is provided with a moving groove 74 on the side close to the fixed column 21. The moving groove 74 is arranged along the vertical direction of the rotating column 31. The rotating column 31 is slidably connected with a connecting rod 75. The connecting rod 75 is located in the moving groove 74. The long side of the connecting rod 75 is perpendicular to the long side of the moving groove 74. The connecting rod 75 can move along the vertical direction of the rotating column 31. The end of the rotating part 72 away from the moving part 71 is rotatably connected with the connecting rod 75.

[0043] The support assembly 7 further comprises a pressure driving piece. In the embodiment of the application, the pressure driving piece is a hydraulic cylinder 76. The hydraulic cylinder 76 is installed on the top surface of the fixed column 21. The output end of the hydraulic cylinder 76 is movably inserted into the top of the fixed column 21. The output end of the hydraulic cylinder 76 extends into the cavity of the fixed column 21. Correspondingly, the top surface of the support rod is provided with a pressing hole. The output end of the hydraulic cylinder 76 is aligned with the pressing hole. When the hydraulic cylinder 76 is started, the output end of the hydraulic cylinder 76 is movably inserted into the pressing hole. There are a plurality of pressing holes, which are distributed along the long side direction of the support rod. There are a plurality of support assemblies 7, which are distributed in a plurality of fixed columns 21.

[0044] When the moving frame 3 rotates upward, the connecting rod 75 pulls the rotating part 72 to move outward, at the same time, the connecting rod 75 moves downward along the moving groove 74, so that the rotating part 72 moves outward, and one end of the rotating part 72 is located in the cavity of the fixed column 21, and the other end of the rotating part 72 is located in the moving groove 74, and the rotating part 72 rotates as a linear motion, so that one end of the rotating part 72 moves downward along the moving groove 74, when the moving frame 3 rotates to a corresponding angle, the part of the moving frame 3 extending outside the room can not affect the use of the outdoor space, the moving frame 3 stops rotating, at this time, the hydraulic cylinder 76 is started, and the output end of the hydraulic cylinder 76 is movably inserted into the pressing hole, so that the supporting rod can support the moving frame 3, and the supporting assembly 7 can share the load borne by the connecting assembly 4, thereby reducing the damage and fracture of the connecting assembly 4 caused by the large load borne by the connecting assembly 4.

[0045] With reference to Figure 3 and Figure 4 When the moving frame 3 needs to rotate by a large angle, the moving frame 3 continues to rotate, and the rotating part 72 moves to the bottom end of the moving groove 74, at this time, the moving part 71 moves to the outside of the fixed column 21, so that the connecting part of the rotating part 72 and the moving part 71 is located outside the fixed column 21, then, in the process that the moving frame 3 continues to rotate, the rotating part 72 is driven to rotate upward, at the same time, the top end of the rotating part 72 moves along the top of the moving groove 74, until the rotation of the moving frame 3 stops, so that when the moving frame 3 rotates by a large angle, the supporting assembly 7 can continuously support the moving frame 3.

[0046] The above are preferred embodiments of the present application, and the embodiments are only an explanation of the present application, and do not limit the protection scope of the present application, therefore: equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A mobile canopy unit, characterized in that, The utility model provides a kind of fixed frame (2), the fixed frame (2) is installed in wall (11) one side, wall (11) is installed with mounting column (12) on the outside, the bottom of the fixed frame (2) one end is installed in the top of the mounting column (12), the fixed frame (2) is rotatably connected with moving frame (3) near mounting column (12) one end, the top of the fixed frame (2) is installed with support frame (5), the bottom of the support frame (5) is hingedly connected with telescopic drive, the bottom of the telescopic drive is hingedly connected with the middle part of the moving frame (3).

2. A mobile canopy unit according to claim 1, wherein The top of the fixed frame (2) is installed with first connecting seat (41) near the one end of the moving frame (3), the top of the moving frame (3) is installed with second connecting seat (42) near the one end of the fixed frame (2), the one end of the second connecting seat (42) is movably inserted into the first connecting seat (41), the one end of the first connecting seat (41) is provided with rotating shaft (43), the one end of the rotating shaft (43) is movably inserted into the side wall of the first connecting seat (41) and the side wall of the second connecting seat (42), and the first connecting seat (41) and the second connecting seat (42) are rotatably connected through the rotating shaft (43).

3. A mobile canopy unit according to claim 1, wherein The top of the mounting column (12) is provided with crossbeam (13), the fixed frame (2) includes fixed column (21) and stabilizing column (22), the bottom of the fixed column (21) one end is connected with the top of the crossbeam (13), the other end of the fixed column (21) is fixed with the outside of wall (11), the fixed column (21) has a plurality of, and the plurality of fixed columns (21) are distributed along the length direction of the crossbeam (13), and the stabilizing column (22) is fixed between the plurality of fixed columns (21).

4. A mobile canopy unit according to claim 3, wherein The moving frame (3) includes rotating column (31) and connecting column (32), the length direction of the rotating column (31) is parallel to the length direction of the fixed column (21), the rotating column (31) has a plurality of, and the plurality of rotating columns (31) and the plurality of fixed columns (21) are one-to-one corresponding, one side of the rotating column (31) is abutted with the outside of the fixed column (21), and the connecting column (32) is connected between the plurality of rotating columns (31).

5. A mobile canopy unit according to claim 4, wherein The fixed frame (2) and the moving frame (3) are provided with support assembly (7), and the support assembly (7) is used to support the moving frame (3).

6. A mobile canopy unit according to claim 5, wherein, The support assembly (7) includes support rod and pressure drive, the pressure drive is installed on the top of the fixed column (21), the output end of the pressure drive is movably inserted into the cavity of the fixed column (21), one end of the support rod is slidably connected in the cavity of the fixed column (21), the rotating column (31) is provided with moving groove (74) near one side of the fixed column (21), the moving groove (74) is arranged along the vertical direction of the rotating column (31), the connecting rod (75) is slidably connected in the rotating column (31), the connecting rod (75) is located in the moving groove (74), and one end of the support rod away from the fixed column (21) is hingedly connected with the connecting rod (75).

7. A mobile canopy unit according to claim 6, wherein The support rod top surface is provided with abutting pressure holes, the pressure driving element output end is aligned with the abutting pressure holes, the abutting pressure holes are multiple, and the multiple abutting pressure holes are distributed along the long side direction of the support rod.

8. A mobile canopy unit according to claim 7, wherein, The support rod comprises a moving part (71) and a rotating part (72), the moving part (71) is movably inserted into the fixed column (21) cavity, one end of the rotating part (72) is rotatably connected with the moving part (71) close to one end of the rotating column (31), and the other end of the rotating part (72) is hingedly connected with the connecting rod (75).

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