A structure for facilitating disassembly and assembly of automobile navigation system

Abstract

The invention discloses a structure for facilitating the disassembly and assembly of a car navigator, and relates to the technical field of car accessories. The structure comprises a feeding barrel and a motor, a navigator, a protective rear seat, an installation rear seat and a protective shell, wherein the protective rear seat is arranged at the rear side of the navigator, the installation rear seat is arranged at the rear side of the protective rear seat, a display screen is arranged at the front side of the navigator, the protective shell is arranged at the outer side of the display screen, a fixing pin is welded on the installation rear seat, a fixing groove is arranged at one side of the protective rear seat, the fixing pin is clamped in the fixing groove, a receiving cavity is arranged in the protective rear seat, a micro-oil cylinder is installed on the inner wall of the receiving cavity by screws, a through hole is arranged between the receiving cavity and the fixing groove, a positioning hole is arranged at one side of the fixing pin, one end of the micro-oil cylinder passes through the through hole and is clamped in the positioning hole, a rotating block is welded on the rear side of the navigator, a connecting groove is arranged on the protective rear seat, and the rotating block is installed in the connecting groove through a rotating shaft. The structure has the characteristics of convenient maintenance and flexible use.

Description

Technical Field

[0001] The invention relates to the technical field of automobile accessories, and in particular to a structure that facilitates the disassembly and assembly of an automobile navigator. Background Art

[0002] Cars are one of the most commonly used means of transportation. Cars are divided into passenger cars and commercial vehicles. Passenger cars are mainly used to carry passengers, their carry-on luggage and temporary items in terms of their design and technical characteristics. Including the driver's seat, a passenger car has no more than 9 seats. Passenger cars mainly include: ordinary passenger cars, convertible passenger cars, high-end passenger cars, small passenger cars, convertibles, hatchback passenger cars, station wagons, multi-purpose passenger cars, short-head passenger cars, off-road passenger cars, and special passenger cars. Most cars nowadays are passenger cars. Navigators are important auto parts. Navigators are used for positioning, navigation and entertainment. With the popularization of cars and the construction of roads, economic exchanges between cities have become more frequent. Car-mounted GPS navigators are very important. Navigation that integrates accurate positioning, navigation and entertainment functions can better meet the needs of car owners and become basic equipment on the car. Navigators are new technology application devices developed on the basis of the global satellite positioning system GPS. Its principle is that GPS is a device that can receive positioning satellite signals, calculate the precise longitude and latitude of the car, as well as the speed and direction of the car through a microprocessor, and display them on a monitor. However, most of the current navigators have certain shortcomings when used. Most ordinary navigators are fixedly installed, which is very laborious to disassemble and repair. In addition, ordinary navigators generally cannot adjust the use angle according to user habits, so they are not flexible enough to use. Therefore, a structure that is easy to disassemble and assemble the car navigator is needed to help solve the above problems. Summary of the invention

[0003] The object of the present invention is to provide a structure for facilitating the disassembly and assembly of a car navigation system, so as to solve the problems of being difficult to maintain and inflexible in use proposed in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a structure for facilitating the disassembly and assembly of a car navigation system, comprising a navigation system, a protective rear seat, an installation rear seat and a protective shell, wherein the protective rear seat is arranged at the rear side of the navigation system, the installation rear seat is arranged at the rear side of the protective rear seat, a display screen is arranged at the front side of the navigation system, the protective shell is arranged at the outer side of the display screen, a fixing pin is fused to the installation rear seat, a fixing groove is arranged at one side of the protective rear seat, the fixing pin is clamped in the fixing groove, a receiving chamber is arranged in the protective rear seat, a micro-cylinder is installed on the inner wall of the receiving chamber by screws, a through hole is arranged between the receiving chamber and the fixing groove, a positioning hole is arranged at one side of the fixing pin, and one end of the micro-cylinder passes through the through hole and is clamped in the positioning hole.

[0005] A rotating block is welded to the rear side of the navigator, a connecting groove is provided on the protective rear seat, the rotating block is installed in the connecting groove through a rotating shaft, an installation cavity and a receiving groove are provided in the protective rear seat, a micro motor is installed on the inner wall of the installation cavity through bolts, a brake ring is installed in the receiving groove through a rotating shaft, the brake ring is installed on the output shaft of the micro motor, a protruding tooth is welded on one side of the brake ring, an arc-shaped tooth groove is provided on the rear side of the navigator, and the protruding tooth is meshed with the arc-shaped tooth groove.

[0006] The protective rear seat is provided with a vehicle-mounted power supply, the display screen is provided with a switch group, the vehicle-mounted power supply is connected to the switch group through wires, and the switch group is respectively connected to the micro motor and the micro cylinder through wires.

[0007] Preferably, an auxiliary groove is provided on one side of the inner wall of the fixing groove, a protrusion is welded on one side of the fixing pin, and the protrusion is clamped in the auxiliary groove.

[0008] Preferably, a push piece is welded on the inner wall of the auxiliary groove via a spring, and the protrusion is tightly attached to one side of the push piece.

[0009] Preferably, a card slot is provided in the protective shell, and the display screen is card-mounted in the card slot.

[0010] Preferably, a card-connecting piece is welded on the rear side of the protective shell, and card-connecting grooves are arranged on both sides of the navigator, and the card-connecting piece is clamped in the card-connecting grooves.

[0011] Preferably, a control cavity is provided on the inner side of the inner wall of the clamping slot, an electromagnetic suction block is installed on the inner wall of the control cavity, and the electromagnetic suction block is connected to the switch group through an electric wire.

[0012] Preferably, a metal sheet is welded to the inner wall of the control cavity via spring 2, and the metal sheet is clamped in the control cavity.

[0013] Preferably, a mounting block is welded on one side of the metal sheet, a slot hole is provided between the control cavity and the clamping slot, a mounting hole is provided on the clamping sheet, and one end of the mounting block passes through the slot hole and is clamped in the mounting hole.

[0014] Technical effects and advantages of the present invention:

[0015] 1. When the present invention is in use, the protective rear seat and the navigator can be quickly disassembled through simple operations, thereby saving time and labor and facilitating the maintenance and inspection of the navigator.

[0016] 2. When the present invention is in use, the protective shell can be quickly separated from the navigator and the display screen through simple operations, so the display screen can be easily cleaned and the occurrence of incomplete cleaning can be prevented.

[0017] 3. When the present invention is in use, the use angle of the navigator can be adjusted through simple operations, so it is very flexible and convenient to use. In addition, only one side of the brake ring is provided with raised teeth, so the rotation angle of the navigator is limited, thereby preventing excessive rotation from occurring. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of the structure of the present invention.

[0019] Figure 2 The figure is a top view of a protective rear seat of the structure of the present invention.

[0020] Figure 3 The figure is a side sectional view of the protective rear seat of the structure of the present invention.

[0021] Figure 4 The figure is a top view of a navigator according to the structure of the present invention.

[0022] Figure 5 The structure of the present invention Figure 4 Partial structure view.

[0023] In the figure: 1. Navigator; 2. Protect the back seat; 3. Install the back seat; 4. Protect the shell; 5. Display screen; 6. Fixing pin; 7. Micro cylinder; 8. Positioning hole; 9. Rotating block; 10. Micro motor; 11. Brake ring; 12. Raised teeth; 13. Arc-shaped tooth groove; 14. On-board power supply; 15. Switch group; 16. Bump; 17. Spring 1; 18. Push piece; 19. Snap-on piece; 20. Snap-on groove; 21. Electromagnetic suction block; 22. Spring 2; 23. Metal sheet; 24. Assembly block; 25. Assembly hole. DETAILED DESCRIPTION

[0024] 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.

[0025] The present invention provides Figure 1-5The structure shown is convenient for disassembling and assembling a car navigation system, comprising a navigation system 1, a protective rear seat 2, an installation rear seat 3 and a protective shell 4. The protective rear seat 2 is arranged at the rear side of the navigation system 1, the installation rear seat 3 is arranged at the rear side of the protective rear seat 2, a display screen 5 is arranged at the front side of the navigation system 1, the protective shell 4 is arranged at the outside of the display screen 5, a fixing pin 6 is welded on the installation rear seat 3, a fixing groove is arranged at one side of the protective rear seat 2, the fixing pin 6 is clamped in the fixing groove, a receiving cavity is arranged in the protective rear seat 2, a micro-cylinder 7 is installed on the inner wall of the receiving cavity by screws, a through hole is arranged between the receiving cavity and the fixing groove, a positioning hole 8 is arranged at one side of the fixing pin 6, and one end of the micro-cylinder 7 passes through the through hole and is clamped in the positioning hole 8.

[0026] A rotating block 9 is welded to the rear side of the navigator 1, and a connecting groove is provided on the protective rear seat 2. The rotating block 9 is installed in the connecting groove through a rotating shaft. An installation cavity and a receiving groove are provided in the protective rear seat 2. A micro motor 10 is installed on the inner wall of the installation cavity through bolts. A brake ring 11 is installed in the receiving groove through a rotating shaft. The brake ring 11 is installed on the output shaft of the micro motor 10. A protruding tooth 12 is welded on one side of the brake ring 11. An arc-shaped tooth groove 13 is provided on the rear side of the navigator 1, and the protruding tooth 12 is meshed with the arc-shaped tooth groove 13.

[0027] An on-board power supply 14 is arranged in the protective rear seat 2, and a switch group 15 is arranged on the display screen 5. The on-board power supply 14 is connected to the switch group 15 through wires, and the switch group 15 is respectively connected to the micro motor 10 and the micro cylinder 7 through wires.

[0028] An auxiliary groove is provided on one side of the inner wall of the fixing groove, a protrusion 16 is welded on one side of the fixing pin 6, the protrusion 16 is clamped in the auxiliary groove, a push piece 18 is welded on the inner wall of the auxiliary groove through a spring 17, and the protrusion 16 is tightly attached to one side of the push piece 18.

[0029] A card slot is provided in the protective shell 4, and the display screen 5 is carded in the card slot. A card connecting piece 19 is welded on the rear side of the protective shell 4. Card connecting slots 20 are provided on both sides of the navigator 1. The card connecting piece 19 is carded in the card connecting slot 20. A control cavity is provided on the inner side of the inner wall of the card connecting slot 20. An electromagnetic suction block 21 is installed on the inner wall of the control cavity. The electromagnetic suction block 21 is connected to the switch group 15 through an electric wire. A metal sheet 23 is welded on the inner wall of the control cavity through a spring 22. The metal sheet 23 is carded in the control cavity. A mounting block 24 is welded on one side of the metal sheet 23. A slot hole is provided between the control cavity and the card connecting slot 20. A mounting hole 25 is provided on the card connecting piece 19. One end of the mounting block 24 passes through the slot hole and is carded in the mounting hole 25.

[0030] Embodiment 1: Quick separation of the protective rear seat 2 and the mounting rear seat 3

[0031] The utility model comprises a navigator 1, a protective rear seat 2, an installation rear seat 3 and a protective shell 4, wherein the protective rear seat 2 is arranged at the rear side of the navigator 1, the installation rear seat 3 is arranged at the rear side of the protective rear seat 2, a display screen 5 is arranged at the front side of the navigator 1, the protective shell 4 is arranged at the outer side of the display screen 5, a fixing pin 6 is welded on the installation rear seat 3, a fixing groove is arranged at one side of the protective rear seat 2, the fixing pin 6 is clamped in the fixing groove, a containing cavity is arranged in the protective rear seat 2, a micro-cylinder 7 is installed on the inner wall of the containing cavity by screws, a through hole is arranged between the containing cavity and the fixing groove, a positioning hole 8 is arranged at one side of the fixing pin 6, and one end of the micro-cylinder 7 passes through the through hole and is clamped in the positioning hole 8.

[0032] An on-board power supply 14 is arranged in the protective rear seat 2, and a switch group 15 is arranged on the display screen 5. The on-board power supply 14 is connected to the switch group 15 through wires, and the switch group 15 is respectively connected to the micro motor 10 and the micro cylinder 7 through wires.

[0033] When the present invention is used, the protective rear seat 2 and the navigator 1 can be quickly disassembled by simple operation. Figure 2 As shown, the protective rear seat 2 and the installed rear seat 3 are fixedly connected by clamping one end of the micro-cylinder 7 in the positioning hole 8 on one side of the fixing pin 6. When the protective rear seat 2 and the navigator 1 need to be disassembled, the micro-cylinder 7 is controlled to retract by the switch group 15, so that one end of the micro-cylinder 7 can be retracted from the positioning hole 8. When one end of the micro-cylinder 7 is completely retracted, there is no fixed connection relationship between the fixing pin 6 and the protective rear seat 2. Therefore, the push piece 18 can be pushed outward under the elastic force of the spring 17. The push piece 18 can apply an elastic force to the protrusion 16 and the fixing pin 6 toward the outside, and then the protective rear seat 2 and the navigator 1 can be popped outward under the action of the elastic force, so the protective rear seat 2 and the navigator 1 can be quickly disassembled.

[0034] Embodiment 2: Quick disassembly of the protective housing 4

[0035] The protective back seat 2 is arranged on the rear side of the navigator 1, the installation back seat 3 is arranged on the rear side of the protective back seat 2, a display screen 5 is arranged on the front side of the navigator 1, the protective shell 4 is arranged on the outside of the display screen 5, a fixing pin 6 is welded on the installation back seat 3, a fixing groove is arranged on one side of the protective back seat 2, the fixing pin 6 is clamped in the fixing groove, a accommodating cavity is arranged in the protective back seat 2, a micro-cylinder 7 is installed on the inner wall of the accommodating cavity by screws, a through hole is arranged between the accommodating cavity and the fixing groove, a positioning hole 8 is arranged on one side of the fixing pin 6, and one end of the micro-cylinder 7 passes through the through hole and is clamped in the positioning hole 8.

[0036] A card slot is provided in the protective shell 4, and the display screen 5 is carded in the card slot. A card connecting piece 19 is welded on the rear side of the protective shell 4. Card connecting slots 20 are provided on both sides of the navigator 1. The card connecting piece 19 is carded in the card connecting slot 20. A control cavity is provided on the inner side of the inner wall of the card connecting slot 20. An electromagnetic suction block 21 is installed on the inner wall of the control cavity. The electromagnetic suction block 21 is connected to the switch group 15 through an electric wire. A metal sheet 23 is welded on the inner wall of the control cavity through a spring 22. The metal sheet 23 is carded in the control cavity. A mounting block 24 is welded on one side of the metal sheet 23. A slot hole is provided between the control cavity and the card connecting slot 20. A mounting hole 25 is provided on the card connecting piece 19. One end of the mounting block 24 passes through the slot hole and is carded in the mounting hole 25.

[0037] When the present invention is used, the protective shell 4 can be quickly separated from the navigator 1 and the display screen 5 by simple operation, so that the display screen 5 can be easily cleaned. Figure 4 and Figure 5 As shown, the protective shell 4 and the navigator 1 are fixedly connected by an assembly block 24 which is clamped in the assembly hole 25. When the protective shell 4 needs to be removed, the electromagnetic suction block 21 is started by the switch group 15, so that the electromagnetic suction block 21 can generate magnetism and attract the metal sheet 23, and then the metal sheet 23 can drive the assembly block 24 to squeeze the spring 22 and move into the control cavity. When the assembly block 24 is completely removed from the assembly hole 25, there is no fixed connection relationship between the clamping piece 19 and the navigator 1, so the protective shell can be directly and quickly removed.

[0038] Embodiment 3: Angle adjustment of the navigator 1

[0039] The protective back seat 2 is arranged on the rear side of the navigator 1, the installation back seat 3 is arranged on the rear side of the protective back seat 2, a display screen 5 is arranged on the front side of the navigator 1, the protective shell 4 is arranged on the outside of the display screen 5, a fixing pin 6 is welded on the installation back seat 3, a fixing groove is arranged on one side of the protective back seat 2, the fixing pin 6 is clamped in the fixing groove, a accommodating cavity is arranged in the protective back seat 2, a micro-cylinder 7 is installed on the inner wall of the accommodating cavity by screws, a through hole is arranged between the accommodating cavity and the fixing groove, a positioning hole 8 is arranged on one side of the fixing pin 6, and one end of the micro-cylinder 7 passes through the through hole and is clamped in the positioning hole 8.

[0040] A rotating block 9 is welded to the rear side of the navigator 1, and a connecting groove is provided on the protective rear seat 2. The rotating block 9 is installed in the connecting groove through a rotating shaft. An installation cavity and a receiving groove are provided in the protective rear seat 2. A micro motor 10 is installed on the inner wall of the installation cavity through bolts. A brake ring 11 is installed in the receiving groove through a rotating shaft. The brake ring 11 is installed on the output shaft of the micro motor 10. A protruding tooth 12 is welded on one side of the brake ring 11. An arc-shaped tooth groove 13 is provided on the rear side of the navigator 1, and the protruding tooth 12 is meshed with the arc-shaped tooth groove 13.

[0041] An on-board power supply 14 is arranged in the protective rear seat 2, and a switch group 15 is arranged on the display screen 5. The on-board power supply 14 is connected to the switch group 15 through wires, and the switch group 15 is respectively connected to the micro motor 10 and the micro cylinder 7 through wires.

[0042] When the present invention is used, the use angle of the navigator 1 can be adjusted, such as Figure 2 and Figure 3 As shown, the contact surface between the navigator 1 and the protective rear seat 2 is an arc surface, and the rotating block 9 on the rear side of the navigator 1 is connected to the protective rear seat 2 through a rotating shaft. The micro motor 10 is controlled to rotate by the switch group 15, so the micro motor 10 can drive the brake ring 11 to rotate slowly. Under the action of the raised teeth 12 and the arc-shaped tooth grooves 13, the brake ring 11 can drive the navigator 1 to rotate with the rotating shaft as the center, so that the use angle of the navigator 1 can be adjusted. The angle adjustment of the navigator 1 can be controlled by controlling the forward and reverse rotation of the micro motor 10, and the brake ring 11 is only provided with raised teeth 12 on one side, so the rotation angle of the navigator 1 is limited, thereby preventing excessive rotation from occurring.

[0043] Working principle of the present invention: When the present invention is used, the rear seat 3 can be installed in the car, and the protective rear seat 2 and the navigator 1 can be quickly disassembled by simple operation. Figure 2 As shown, the protective rear seat 2 and the installed rear seat 3 are fixedly connected by clamping one end of the micro-cylinder 7 in the positioning hole 8 on one side of the fixing pin 6. When the protective rear seat 2 and the navigator 1 need to be disassembled, the micro-cylinder 7 is controlled to retract by the switch group 15, so that one end of the micro-cylinder 7 can be retracted from the positioning hole 8. When one end of the micro-cylinder 7 is completely retracted, there is no fixed connection relationship between the fixing pin 6 and the protective rear seat 2. Therefore, the push piece 18 can be pushed outward under the elastic force of the spring 17. The push piece 18 can apply an elastic force to the protrusion 16 and the fixing pin 6 toward the outside, and then the protective rear seat 2 and the navigator 1 can be popped outward under the action of the elastic force, so the protective rear seat 2 and the navigator 1 can be quickly disassembled.

[0044] When the present invention is used, the protective shell 4 can be quickly separated from the navigator 1 and the display screen 5 by simple operation, so that the display screen 5 can be easily cleaned. Figure 4 and Figure 5 As shown, the protective shell 4 and the navigator 1 are fixedly connected by an assembly block 24 which is clamped in the assembly hole 25. When the protective shell 4 needs to be removed, the electromagnetic suction block 21 is started by the switch group 15, so that the electromagnetic suction block 21 can generate magnetism and attract the metal sheet 23, and then the metal sheet 23 can drive the assembly block 24 to squeeze the spring 22 and move into the control cavity. When the assembly block 24 is completely removed from the assembly hole 25, there is no fixed connection relationship between the clamping piece 19 and the navigator 1, so the protective shell can be directly and quickly removed.

[0045] When the present invention is used, the use angle of the navigator 1 can be adjusted, such as Figure 2 and Figure 3 As shown, the contact surface between the navigator 1 and the protective rear seat 2 is an arc surface, and the rotating block 9 on the rear side of the navigator 1 is connected to the protective rear seat 2 through a rotating shaft. The micro motor 10 is controlled to rotate by the switch group 15, so the micro motor 10 can drive the brake ring 11 to rotate slowly. Under the action of the raised teeth 12 and the arc-shaped tooth grooves 13, the brake ring 11 can drive the navigator 1 to rotate with the rotating shaft as the center, so that the use angle of the navigator 1 can be adjusted. The angle adjustment of the navigator 1 can be controlled by controlling the forward and reverse rotation of the micro motor 10, and the brake ring 11 is only provided with raised teeth 12 on one side, so the rotation angle of the navigator 1 is limited, thereby preventing excessive rotation from occurring.

[0046] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A structure for facilitating the disassembly and assembly of a car navigation system, comprising a navigation system (1), a protective rear seat (2), an installation rear seat (3) and a protective housing (4), characterized in that: The protective back seat (2) is arranged at the rear side of the navigator (1), the mounting back seat (3) is arranged at the rear side of the protective back seat (2), a display screen (5) is arranged at the front side of the navigator (1), the protective shell (4) is arranged at the outside of the display screen (5), a fixing pin (6) is welded on the mounting back seat (3), a fixing groove is arranged on one side of the protective back seat (2), the fixing pin (6) is clamped in the fixing groove, a receiving cavity is arranged in the protective back seat (2), a micro-cylinder (7) is installed on the inner wall of the receiving cavity by screws, a through hole is arranged between the receiving cavity and the fixing groove, a positioning hole (8) is arranged on one side of the fixing pin (6), one end of the micro-cylinder (7) passes through the through hole and is clamped in the positioning hole (8); A rotating block (9) is welded to the rear side of the navigator (1); a connecting groove is provided on the protective rear seat (2); the rotating block (9) is mounted in the connecting groove via a rotating shaft; a mounting cavity and a receiving groove are provided in the protective rear seat (2); a micro motor (10) is mounted on the inner wall of the mounting cavity via bolts; a brake ring (11) is mounted in the receiving groove via a rotating shaft; the brake ring (11) is mounted on the output shaft of the micro motor (10); a protruding tooth (12) is welded to one side of the brake ring (11); an arc-shaped tooth groove (13) is provided on the rear side of the navigator (1); the protruding tooth (12) meshes with the arc-shaped tooth groove (13); The protective rear seat (2) is provided with a vehicle-mounted power supply (14), the display screen (5) is provided with a switch group (15), the vehicle-mounted power supply (14) is connected to the switch group (15) via wires, and the switch group (15) is respectively connected to the micro motor (10) and the micro cylinder (7) via wires; An auxiliary groove is provided on one side of the inner wall of the fixing groove, a protrusion (16) is welded on one side of the fixing pin (6), and the protrusion (16) is locked in the auxiliary groove; a card slot is provided in the protective shell (4), and the display screen (5) is locked in the card slot; a card connection sheet (19) is welded on the rear side of the protective shell (4), and card slots (20) are provided on both sides of the navigator (1), and the card connection sheet (19) is locked in the card slot (20); a control cavity is provided on the inner side of the inner wall of the card slot (20), and an electromagnetic suction block (21) is installed on the inner wall of the control cavity, and the electromagnetic suction block (21) is connected to the switch group (15) through an electric wire.

2. The structure for facilitating assembly and disassembly of a car navigation system according to claim 1, characterized in that: A push piece (18) is welded to the inner wall of the auxiliary groove via a spring (17), and the protrusion (16) is tightly attached to one side of the push piece (18).

3. The structure for facilitating assembly and disassembly of a car navigation system according to claim 1, characterized in that: A metal sheet (23) is welded to the inner wall of the control cavity via a second spring (22), and the metal sheet (23) is clamped in the control cavity.

4. The structure for facilitating assembly and disassembly of a car navigation system according to claim 3, characterized in that: A mounting block (24) is welded to one side of the metal sheet (23), a slot hole is provided between the control cavity and the clamping slot (20), a mounting hole (25) is provided on the clamping sheet (19), and one end of the mounting block (24) passes through the slot hole and is clamped in the mounting hole (25).

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