Mounting structure convenient to move for LED display screen

Abstract

The utility model provides a convenient-to-move mounting structure for an LED display screen. The convenient-to-move mounting structure comprises a base, a fixed column, a movable column, a connecting seat, a mounting frame, a lifting assembly and an adjusting assembly, the fixed column is fixedly connected to the center of the top end of the base; the movable column is connected to the interior of the fixed column in a sliding mode, the connecting base is connected to the outer side of the movable column in a sleeving mode, and one end of the connecting base is rotationally connected with one end of a bent arm; the outer side wall of the mounting frame is fixedly connected to the other end of the bent arm; the lifting assembly is arranged between the fixed column and the movable column; and the adjusting assembly is mounted between the mounting frame and the movable column. According to the mounting structure convenient to move for the LED display screen, through the structural design of the base, the fixed column, the movable column, the connecting base, the mounting frame, the lifting assembly, the adjusting assembly and the positioning assembly, the LED display screen can be conveniently driven to move for use, the height and the inclination angle of the LED display screen can be conveniently adjusted, and the LED display screen and the mounting frame can be conveniently and rapidly disassembled and assembled.

Description

Technical Field

[0001] The utility model relates to a mounting structure for an LED display screen which is easy to move. Background Art

[0002] LED displays can transform between various information presentation modes and can be used both indoors and outdoors, offering unparalleled advantages over other displays. Their high light intensity, low power consumption, low voltage requirements, compact size, long service life, impact resistance, and strong resistance to external interference have led to their rapid development and widespread application in various fields.

[0003] For example, publication number CN209445011U discloses a full-color LED display installation structure, including a concrete base, a mounting plate, fixing bolts, a tilting link, a buffer link, a screen fixing frame, an upper groove, an LED screen, a lower groove, and a trapezoidal fixing groove. The screen fixing frame is vertically installed on the concrete base, one end of the buffer link is welded to the screen fixing frame body, and the other end of the buffer link is connected and installed with the tilting link pin. The mounting plate is fixed to the concrete base with fixing bolts, and upper and lower ends of the screen fixing frame are welded with upper and lower grooves, and LED screens are installed in the grooves of the upper and lower grooves. A trapezoidal fixing groove is welded and installed at the lower end of the lower groove. A full-color LED display installation structure, a tilting link connects the screen fixing frame and the concrete base, the buffer link has excellent buffering performance, which avoids the impact of strong winds on the LED screen, and the LED screen itself is pressed on the trapezoidal fixing groove. The trapezoidal fixing groove has good stability under the pressure of gravity, and the structure is stable and safe.

[0004] The above-mentioned LED display screen installation structure is not convenient for moving the LED display screen, and is not convenient for adjusting the height and tilt angle of the LED display screen through the installation structure. The LED display screen and the installation frame are not convenient for quick disassembly and assembly. Utility Model Content

[0005] In order to solve the technical problems that the existing LED display screen installation structure is not convenient for moving the LED display screen for use, it is not convenient to adjust the height and tilt angle of the LED display screen through the installation structure, and it is not convenient to quickly disassemble and assemble the LED display screen and the installation frame, the utility model provides a mobile installation structure for the LED display screen.

[0006] The utility model solves the above technical problems through the following technical solutions:

[0007] The utility model provides a mobile mounting structure for an LED display screen, comprising a base and a fixing column, wherein the fixing column is fixedly connected to the top center of the base, and further comprising:

[0008] A movable column, the movable column being slidably connected to the interior of the fixed column:

[0009] A connecting seat, the connecting seat is sleeved on the outer side of the movable column, and one end of the connecting seat is rotatably connected to one end of the bent arm;

[0010] A mounting frame, wherein an outer side wall of the mounting frame is fixedly connected to the other end of the bent arm;

[0011] A lifting assembly, the lifting assembly being arranged between the fixed column and the movable column;

[0012] An adjusting component is installed between the installation frame and the movable column.

[0013] In this technical solution, the lifting component is set up to facilitate the adjustment of the overall length of the fixed column and the movable column, thereby facilitating the adjustment of the display height of the LED display screen. The adjustment component is set up to facilitate the adjustment of the inclination angle of the installation frame, thereby facilitating the adjustment of the inclination angle of the LED display screen, and facilitating the display use.

[0014] Preferably, four universal wheels are installed around the bottom end of the base, and the four universal wheels are symmetrically distributed around the bottom end of the base.

[0015] In this technical solution, four universal wheels are provided at the bottom end of the base to facilitate rapid movement of the device.

[0016] Preferably, the lifting assembly includes a motor, an inner groove, a movable block, a connecting plate, a first screw rod and a support rod, the motor is installed at the bottom of the fixed column, the inner groove is opened inside the fixed column, the first screw rod is rotatably connected to the inner wall of the inner groove and the output end of the motor, the movable block is threadedly connected to the first screw rod, the connecting plate is fixedly connected to the outer wall of the movable block, and the support rod is fixedly connected to the connecting plate and the bottom end of the movable column.

[0017] In this technical solution, by starting the motor, the motor drives the first screw to rotate, the first screw and the movable block thread rotate, the movable block drives the connecting plate to move up, and the connecting plate pushes the movable column up through the support rod, thereby adjusting the position of the movable column and the fixed column, and then adjusting the height of the installation frame for convenient display and use.

[0018] Preferably, the movable column is slidably connected to the inner groove inside the fixed column, the inner groove is slidably connected to a connecting plate, the inner groove is a rectangular groove, and the support rod at the top of the connecting plate is slidably connected to the top of the fixed column.

[0019] In this technical solution, a support rod is provided that is slidably connected to the top of the fixed column, so that the support rod can be easily moved up and down.

[0020] Preferably, the adjustment assembly includes a movable sleeve, an adjustment bolt, an adjustment hole, a connecting block, a first connecting rod and a fixed block. The movable sleeve is slidably connected to the outer wall of the movable column, the adjustment holes are equidistantly arranged on the outer side wall of the movable column, the adjusting bolt is threadedly connected to the movable sleeve and the adjustment hole, the connecting block is fixedly connected to the outer wall of the movable sleeve, the fixed block is fixedly connected to the outer wall of one end of the mounting frame, and the first connecting rod is rotatably connected between the fixed block and the connecting block.

[0021] In this technical solution, when the inclination angle of the mounting frame needs to be adjusted, the movable sleeve is pushed to slide up and down along the movable column. The movable sleeve pushes the fixed block and the bottom of the mounting frame to move through the connecting block and the first connecting rod. The top of the mounting frame rotates through the bent arm and the connecting seat. The movable sleeve is threadedly connected to the adjustment hole by adjusting the bolt to fix the position of the movable sleeve, and then the inclination angle of the mounting frame is fixed, which is convenient for display and use.

[0022] Preferably, the inner diameter of the movable sleeve is larger than the outer diameter of the movable column, and the movable sleeve is located at the bottom of the connecting seat. The inner diameter of the movable sleeve is larger than the outer diameter of the movable column, and the movable sleeve is located at the bottom of the connecting seat.

[0023] In this technical solution, the movable sleeve and the movable column are provided to facilitate the sliding of the movable sleeve along the movable column.

[0024] Preferably, a mounting groove is provided inside the mounting frame, two support plates are installed inside the mounting groove, and a guide groove is provided on a side wall at one end of the mounting frame.

[0025] In this technical solution, the two support plates are provided to facilitate support for the second screw rod, and the guide grooves are provided to facilitate movement of the positioning seat.

[0026] Preferably, the LED display screen has a mounting structure that is easy to move and further includes a positioning assembly, which includes a second screw rod, a movable seat, a handle, a groove, a guide block, a second connecting rod, a U-shaped plate, a movable rod and a positioning seat, the second screw rod is rotatably connected to the two support plates, the movable seat is threadedly connected to the second screw rod, the guide block is fixedly connected to one end of the movable seat, the U-shaped plate is slidably connected to the inside of the mounting groove, the second connecting rod is rotatably connected between the U-shaped plate and the movable seat, the handle is fixedly connected to one end of the second screw rod, the movable rod is fixedly connected to one end of the U-shaped plate, and the positioning seat is fixedly connected to both ends of the movable rod.

[0027] In this technical solution, when installing the LED display screen, the LED display screen to be installed is placed in the center of the placement slot, and then the handle is rotated. The handle drives the second screw rod to rotate, and the second screw rod and the two movable seats are threaded to rotate respectively. The movable seat drives the guide block to slide along the groove, and the movable seat drives the second connecting rods on both sides to move. The second connecting rod pulls the movable rod through the U-shaped plate to move inside the inner groove. The movable rod drives the positioning seats on both sides to slide along the guide groove and press against the two sides of the LED display screen, thereby fixing the display screen in the placement slot, and then facilitating the rapid installation and disassembly of the LED display screen.

[0028] Preferably, the second screw rod is a bidirectional screw rod, both ends of the second screw rod are threadedly connected to a movable seat, and the guide block at the bottom end of the movable seat is slidably connected to the inside of the groove.

[0029] In this technical solution, by providing a second screw rod and a movable seat that are threadedly connected, the movable seat can be easily moved under the action of the second screw rod.

[0030] Preferably, a placement groove is opened on a side wall of one end of the installation frame, one side of the placement groove is connected to the guide groove, and a positioning seat is slidably connected inside the guide groove, and the positioning seat is an L-shaped plate.

[0031] In this technical solution, the placement groove is provided to facilitate the accommodation of the LED display screen, and the positioning seat is provided to facilitate pressing against the outer wall of the LED display screen.

[0032] On the basis of conforming to the common sense in this field, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present utility model.

[0033] The positive progress effect of this utility model is:

[0034] The above-mentioned LED display screen uses an easy-to-move installation structure through the structural design of the base, fixed column, movable column, connecting seat, installation frame, lifting assembly, adjustment assembly and positioning assembly, which makes it easy to move the LED display screen for use, easy to adjust the height and tilt angle of the LED display screen through the installation structure, and convenient and quick disassembly and assembly between the LED display screen and the installation frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the three-dimensional structure of the conveniently movable installation structure for the LED display screen of the present invention.

[0036] Figure 2 This is a schematic diagram of the internal structure of the conveniently movable installation structure for the LED display screen of the present invention.

[0037] Figure 3 This is a schematic diagram of the internal structure of the installation frame in the conveniently movable installation structure for the LED display screen of the present invention.

[0038] Figure 4 This is a structural schematic diagram of the installation frame in the conveniently movable installation structure for the LED display screen of the present invention.

[0039] Description of Reference Numerals

[0040] 1. Base; 11. Universal wheel; 2. Fixed column; 3. Movable column; 4. Connecting seat; 41. Bending arm; 5. Mounting frame; 51. Placement slot; 6. Lifting assembly; 61. Motor; 62. Inner slot; 63. Movable block; 64. Connecting plate; 65. First screw rod; 66. Support rod; 7. Adjusting assembly; 71. Movable sleeve; 72. Adjusting bolt; 73. Adjusting hole; 74. Connecting block; 75. First connecting rod; 76. Fixed block; 8. Mounting slot; 81. Guide slot; 82. Support plate; 9. Positioning assembly; 91. Second screw rod; 92. Movable seat; 93. Handle; 94. Groove; 95. Guide block; 96. Second connecting rod; 97. U-shaped plate; 98. Movable rod; 99. Positioning seat. DETAILED DESCRIPTION

[0041] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0042] Figures 1 to 4 As shown, an embodiment of the present invention provides a mobile mounting structure for an LED display screen, comprising a base 1 and a fixing column 2, wherein the fixing column 2 is fixedly connected to the top center of the base 1, and further comprising:

[0043] The movable column 3 is slidably connected to the interior of the fixed column 2:

[0044] A connecting seat 4 is sleeved on the outer side of the movable column 3, and one end of the connecting seat 4 is rotatably connected to one end of a curved arm 41;

[0045] An installation frame 5, the outer side wall of which is fixedly connected to the other end of the bent arm 41;

[0046] A lifting assembly 6, the lifting assembly 6 is arranged between the fixed column 2 and the movable column 3;

[0047] The adjusting component 7 is installed between the mounting frame 5 and the movable column 3 .

[0048] Specifically, by setting the lifting component 6, it is convenient to adjust the overall length of the fixed column 2 and the movable column 3, thereby facilitating the adjustment of the display height of the LED display screen. By setting the adjustment component 7, it is convenient to adjust the inclination angle of the mounting frame 5, thereby facilitating the adjustment of the inclination angle of the LED display screen, making it convenient to use the display.

[0049] like Figures 1 to 4 As shown, four universal wheels 11 are installed around the bottom end of the base 1, and the four universal wheels 11 are symmetrically distributed around the bottom end of the base 1.

[0050] Specifically, the four universal wheels 11 provided at the bottom of the base facilitate rapid movement of the device.

[0051] like Figures 1 to 4 As shown, the lifting assembly 6 includes a motor 61, an inner groove 62, a movable block 63, a connecting plate 64, a first screw rod 65 and a support rod 66. The motor 61 is installed at the bottom of the fixed column 2, and the inner groove 62 is opened inside the fixed column 2. The first screw rod 65 is rotatably connected to the inner wall of the inner groove 62 and the output end of the motor 61. The movable block 63 is threadedly connected to the first screw rod 65. The connecting plate 64 is fixedly connected to the outer wall of the movable block 63. The support rod 66 is fixedly connected to the connecting plate 64 and the bottom end of the movable column 3.

[0052] Specifically, by starting the motor 61, the motor 61 drives the first screw rod 65 to rotate, the first screw rod 65 and the movable block 63 rotate in a threaded manner, the movable block 63 drives the connecting plate 64 to move upward, and the connecting plate 64 pushes the movable column 3 upward through the support rod 66, thereby adjusting the position of the movable column 3 and the fixed column 2, and then adjusting the height of the mounting frame 5 for convenient display and use.

[0053] like Figures 1 to 4 As shown, the movable column 3 is slidably connected in the inner groove 62 inside the fixed column 2, and the inner groove 62 is slidably connected with a connecting plate 64. The inner groove 62 is a rectangular groove, and the support rod 66 at the top of the connecting plate 64 is slidably connected to the top of the fixed column 2.

[0054] Specifically, by providing a support rod 66 that is slidably connected to the top of the fixed column 2, the up and down movement of the support rod 66 is facilitated.

[0055] like Figures 1 to 4 As shown, the adjustment assembly 7 includes a movable sleeve 71, an adjusting bolt 72, an adjusting hole 73, a connecting block 74, a first connecting rod 75 and a fixed block 76. The movable sleeve 71 is slidably connected to the outer wall of the movable column 3, and the adjusting holes 73 are equidistantly arranged on the outer wall of the movable column 3. The adjusting bolt 72 is threadedly connected to the movable sleeve 71 and the adjusting hole 73. The connecting block 74 is fixedly connected to the outer wall of the movable sleeve 71. The fixed block 76 is fixedly connected to the outer wall of one end of the mounting frame 5. The first connecting rod 75 is rotatably connected between the fixed block 76 and the connecting block 74.

[0056] Specifically, when the inclination angle of the mounting frame 5 needs to be adjusted, the movable sleeve 71 is pushed to slide up and down along the movable column 3. The movable sleeve 71 pushes the fixed block 76 and the bottom of the mounting frame 5 to move through the connecting block 74 and the first connecting rod 75. The top of the mounting frame 5 rotates with the connecting seat 4 through the bent arm 41. The movable sleeve 71 is threadedly connected to the adjustment hole 73 by the adjusting bolt 72, thereby fixing the position of the movable sleeve 71 and then fixing the inclination angle of the mounting frame 5 for convenient display and use.

[0057] like Figures 1 to 3 As shown, the inner diameter of the movable sleeve 71 is larger than the outer diameter of the movable column 3 , and the movable sleeve 71 is located at the bottom of the connecting seat 4 .

[0058] Specifically, the movable sleeve 71 and the movable column 3 are provided to facilitate the sliding of the movable sleeve 71 along the movable column 3 .

[0059] like Figures 1 to 4 As shown, a mounting groove 8 is provided inside the mounting frame 5 , two support plates 82 are installed inside the mounting groove 8 , and a guide groove 81 is provided on one end side wall of the mounting frame 5 .

[0060] Specifically, the two support plates 82 are provided to facilitate support for the second screw rod 91 , and the guide groove 81 is provided to facilitate movement of the positioning seat 99 .

[0061] like Figures 1 to 4 As shown, the LED display screen has a mounting structure that is easy to move and also includes a positioning assembly 9, which includes a second screw rod 91, a movable seat 92, a handle 93, a groove 94, a guide block 95, a second connecting rod 96, a U-shaped plate 97, a movable rod 98 and a positioning seat 99. The second screw rod 91 is rotatably connected to the two support plates 82, the movable seat 92 is threadedly connected to the second screw rod 91, the guide block 95 is fixedly connected to one end of the movable seat 92, the U-shaped plate 97 is slidably connected to the inside of the mounting groove 8, the second connecting rod 96 is rotatably connected between the U-shaped plate 97 and the movable seat 92, the handle 93 is fixedly connected to one end of the second screw rod 91, the movable rod 98 is fixedly connected to one end of the U-shaped plate 97, and the positioning seat 99 is fixedly connected to both ends of the movable rod 98.

[0062] Specifically, when installing the LED display screen, the LED display screen to be installed is placed in the center of the placement groove 51, and then the handle 93 is rotated. The handle 93 drives the second screw rod 91 to rotate, and the second screw rod 91 and the two movable seats 92 are threaded and rotated respectively. The movable seat 92 drives the guide block 95 to slide along the groove 94, and the movable seat 92 drives the second connecting rod 96 on both sides to move. The second connecting rod 96 pulls the movable rod 98 to move inside the inner groove 62 through the U-shaped plate 97. The movable rod 98 drives the positioning seats 99 on both sides to slide along the guide groove 81 and press against the two sides of the LED display screen, thereby fixing the display screen in the placement groove 51, and then facilitating the rapid installation and disassembly of the LED display screen.

[0063] like Figures 1 to 4 As shown, the second screw rod 91 is a bidirectional screw rod, and both ends of the second screw rod 91 are threadedly connected to a movable seat 92 , and a guide block 95 at the bottom end of the movable seat 92 is slidably connected to the inside of the groove 94 .

[0064] Specifically, by providing the second screw rod 91 and the movable seat 92 that are threadedly connected, the movable seat 92 can be easily moved under the action of the second screw rod 91.

[0065] like Figures 1 to 4 As shown, a placement groove 51 is opened on one side wall of the installation frame 5, and one side of the placement groove 51 is connected to the guide groove 81. A positioning seat 99 is slidably connected inside the guide groove 81, and the positioning seat 99 is an L-shaped plate.

[0066] Specifically, the placement groove 51 is provided to facilitate the accommodation of the LED display screen, and the positioning seat 99 is provided to facilitate pressing against the outer wall of the LED display screen.

[0067] When the locking cam 75 is in the unlock position, the locking cam 76 is unlocked, and the locking cam 76 is unlocked, so that the locking cam 76 can be unlocked. The plate 64 pushes the movable column 3 upward through the support rod 66, thereby adjusting the position of the movable column 3 and the fixed column 2, and then adjusting the height of the installation frame 5 for convenient display and use. When installing the LED display screen, the LED display screen to be installed is placed in the center of the placement groove 51, and then the handle 93 is rotated. The handle 93 drives the second screw rod 91 to rotate, and the second screw rod 91 and the two movable seats 92 are threaded and rotated respectively. The movable seat 92 drives the guide block 95 to slide along the groove 94, and the movable seat 92 drives the second connecting rod 96 on both sides to move. The second connecting rod 96 pulls the movable rod 98 to move inside the inner groove 62 through the U-shaped plate 97. The movable rod 98 drives the positioning seats 99 on both sides to slide along the guide groove 81 and press against the two sides of the LED display screen, thereby fixing the display screen in the placement groove 51, thereby facilitating the rapid installation and disassembly of the LED display screen.

[0068] The present invention is not limited to the above-described embodiments. Any changes in shape or structure fall within the scope of protection of the present invention. The scope of protection of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications shall fall within the scope of protection of the present invention.

Claims

1. A mobile mounting structure for an LED display screen, comprising a base (1) and a fixing column (2), wherein the fixing column (2) is fixedly connected to the top center of the base (1), characterized in that: Also includes: A movable column (3) is slidably connected to the interior of the fixed column (2): A connecting seat (4), wherein the connecting seat (4) is sleeved on the outer side of the movable column (3), and one end of the connecting seat (4) is rotatably connected to one end of a curved arm (41); A mounting frame (5), wherein the outer side wall of the mounting frame (5) is fixedly connected to the other end of the bent arm (41); A lifting assembly (6), the lifting assembly (6) being arranged between the fixed column (2) and the movable column (3); An adjusting component (7) is installed between the installation frame (5) and the movable column (3).

2. The portable mounting structure for an LED display screen according to claim 1, wherein: Four universal wheels (11) are installed around the bottom end of the base (1), and the four universal wheels (11) are symmetrically distributed around the bottom end of the base (1).

3. The portable mounting structure for an LED display screen according to claim 1, wherein: The lifting assembly (6) comprises a motor (61), an inner groove (62), a movable block (63), a connecting plate (64), a first screw rod (65) and a support rod (66); the motor (61) is mounted on the bottom of the fixed column (2); the inner groove (62) is opened inside the fixed column (2); the first screw rod (65) is rotatably connected to the inner wall of the inner groove (62) and the output end of the motor (61); the movable block (63) is threadedly connected to the first screw rod (65); the connecting plate (64) is fixedly connected to the outer wall of the movable block (63); and the support rod (66) is fixedly connected to the connecting plate (64) and the bottom end of the movable column (3).

4. The portable mounting structure for an LED display screen according to claim 1, wherein: The movable column (3) is slidably connected to the inner groove (62) inside the fixed column (2), and the inner groove (62) is slidably connected to a connecting plate (64). The inner groove (62) is a rectangular groove, and the support rod (66) at the top of the connecting plate (64) is slidably connected to the top of the fixed column (2).

5. The portable mounting structure for an LED display screen according to claim 1, wherein: The adjustment assembly (7) comprises a movable sleeve (71), an adjustment bolt (72), an adjustment hole (73), a connecting block (74), a first connecting rod (75) and a fixed block (76); the movable sleeve (71) is slidably connected to the outer wall of the movable column (3); the adjustment hole (73) is equidistantly arranged on the outer wall of the movable column (3); the adjustment bolt (72) is threadedly connected to the movable sleeve (71) and the adjustment hole (73); the connecting block (74) is fixedly connected to the outer wall of the movable sleeve (71); the fixed block (76) is fixedly connected to the outer wall of one end of the mounting frame (5); and the first connecting rod (75) is rotatably connected between the fixed block (76) and the connecting block (74).

6. The portable mounting structure for an LED display screen according to claim 5, characterized in that: The inner diameter of the movable sleeve (71) is greater than the outer diameter of the movable column (3), and the movable sleeve (71) is located at the bottom of the connecting seat (4).

7. The portable mounting structure for an LED display screen according to claim 1, wherein: A mounting groove (8) is provided inside the mounting frame (5), two support plates (82) are installed inside the mounting groove (8), and a guide groove (81) is provided on a side wall at one end of the mounting frame (5).

8. The portable mounting structure for an LED display screen according to claim 7, wherein: The LED display screen is provided with a mounting structure that is easy to move and further includes a positioning assembly (9), wherein the positioning assembly (9) includes a second screw rod (91), a movable seat (92), a handle (93), a groove (94), a guide block (95), a second connecting rod (96), a U-shaped plate (97), a movable rod (98) and a positioning seat (99), wherein the second screw rod (91) is rotatably connected to the two support plates (82), the movable seat (92) is threadedly connected to the second screw rod (91), the guide block (95) is fixedly connected to one end of the movable seat (92), the U-shaped plate (97) is slidably connected to the inside of the mounting groove (8), the second connecting rod (96) is rotatably connected between the U-shaped plate (97) and the movable seat (92), the handle (93) is fixedly connected to one end of the second screw rod (91), the movable rod (98) is fixedly connected to one end of the U-shaped plate (97), and the positioning seat (99) is fixedly connected to both ends of the movable rod (98).

9. The portable mounting structure for an LED display screen according to claim 8, wherein: The second screw rod (91) is a bidirectional screw rod. Both ends of the second screw rod (91) are threadedly connected to a movable seat (92). The guide block (95) at the bottom end of the movable seat (92) is slidably connected to the inside of the groove (94).

10. The portable mounting structure for an LED display screen according to claim 1, wherein: A placement groove (51) is provided on one side wall of the installation frame (5), one side of the placement groove (51) is connected to the guide groove (81), and a positioning seat (99) is slidably connected inside the guide groove (81), and the positioning seat (99) is an L-shaped plate.

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