Remote control equipment for building central air conditioner

Abstract

The invention discloses building central air conditioner remote control equipment which comprises a host, a plurality of control buttons are arranged in the lower side of the front end of the host, a display screen is arranged in the upper side of the front end of the host, heat dissipation grooves are formed in the upper end and the lower end of the host, and a fixing support is connected to the rear end of the host. A wiring board is rotationally connected to the lower side of the interior of the fixing support, the host integrates a signal unit, a control unit, a distribution unit and a display unit, signal receiving and sending, remote and manual control of an air conditioner, circuit distribution and real-time information display are achieved, and the equipment supports remote control achieved through a wireless network and a cloud end. Meanwhile, a manual control button is reserved, and the manual control button is automatically locked during remote control through the cooperation of the electromagnetic coil group and the magnetic linkage head, so that the conflict between remote control and manual operation is avoided, the stability and safety of the system are improved, and the control flexibility is ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of related central air-conditioning systems, and in particular relates to a remote control device for a central air-conditioning in a building. Background Art

[0002] With the rapid development of smart home technology, central air conditioning systems, as key facilities in home and commercial environments, have become important indicators of quality of life in terms of control convenience and intelligence. Traditional central air conditioning control systems often rely on physical buttons or remote controls, which have obvious limitations in operational flexibility and remote control capabilities.

[0003] With the popularization of Internet of Things technology, users have an increasingly urgent demand for central air-conditioning control systems that can achieve remote control, automatic adjustment, and seamless collaboration with other smart devices. This has promoted the research and development and innovation of a new generation of central air-conditioning remote control equipment.

[0004] The shortcomings of the existing technology mainly include operational limitations, single functions, inconvenient interactions, difficult maintenance and potential safety hazards. To this end, this patent proposes a new type of central air-conditioning remote control device, which overcomes the shortcomings of traditional technology, provides an efficient, stable and safe solution, significantly improves the user experience, and meets the comprehensive needs of modern smart homes for convenience, intelligence and safety. Summary of the invention

[0005] The purpose of the present invention is to provide a remote control device for building central air conditioning to solve the problems of limited operation, single function, inconvenient interaction and difficult maintenance of traditional central air conditioning control systems proposed in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a remote control device for a building central air conditioner, comprising a host, a plurality of control buttons are arranged inside the lower side of the front end of the host, a display screen is arranged inside the upper side of the front end of the host, heat dissipation grooves are arranged inside the upper and lower ends of the host, a fixed bracket is connected to the rear end of the host, a terminal block is rotatably connected to the lower side of the fixed bracket, a terminal slot is opened inside the rear end of the terminal block, a plurality of terminal bolts are arranged on the upper side of the terminal slot, and the plurality of terminal bolts are threadedly connected inside the rear end of the terminal block.

[0007] Preferably, a control room is provided inside the lower side of the main engine, a control circuit board is penetrated downwardly through the front side of the inner wall at the upper end of the control room, and a plurality of control buttons are connected to the lower side of the front end of the control circuit board, a limit baffle is provided on the front side of the control circuit board, and the limit baffle is fixedly connected to the inner wall at the upper end of the control room, a locking card is provided on the lower side of the front end of the limit baffle, and the locking card is slidably connected between the outer wall at the front end of the limit baffle and the inner wall at the front end of the control room.

[0008] Preferably, a plurality of locking slots are penetrated from front to back inside the upper end of the locking card plate, and the plurality of locking slots are respectively located on the lower side of a plurality of control buttons, a linkage plate is fixedly connected to the lower side of the rear end of the locking card plate, and the linkage plate is fitted to the inner wall of the lower end of the control chamber, and a magnetic linkage head is fixedly connected to the center of the upper end of the linkage plate.

[0009] Preferably, the upper side of the magnetic linkage head is magnetically connected to a magnetic attraction plate, the center of the upper end of the magnetic attraction plate is fixedly connected to an electromagnetic coil group, and the upper end of the electromagnetic coil group is fixedly connected to the center of the upper inner wall of the control room, and is connected to the inside of the host through a wiring harness.

[0010] Preferably, unlocking springs are provided on both sides of the upper end of the linkage plate, and the upper ends of the two unlocking springs are in contact with the upper inner wall of the control chamber. The linkage plate, magnetic linkage head, magnetic suction plate, electromagnetic coil group and two unlocking springs are all located at the rear end of the control circuit board, and the magnetic linkage head is slidably connected between the rear end outer wall of the control circuit board and the rear end inner wall of the control chamber.

[0011] Preferably, a plurality of connecting plugs are penetrated backward from the interior of the upper rear end of the host, a plurality of adapters are arranged inside the upper front end of the terminal block, and the plurality of connecting plugs are respectively plugged into the interior of the front ends of the plurality of adapters, and the host is circuit-connected to the terminal block via the plurality of connecting plugs and the plurality of adapters.

[0012] Preferably, the lower ends of the multiple adapters are all passed through the inner wall of the upper end of the wiring slot, and connection holes are opened inside the lower ends of the multiple adapters. The connection bolts are threadedly connected to the inside of the adapters and pass through the inside of the connection holes. The lower side of the front end of the fixed bracket is fixedly connected to the limiting support plate, and the main unit is located at the upper end of the limiting support plate.

[0013] Preferably, the upper side of the terminal board is clamped with the fixed bracket through two limit slots and two limit blocks, the two limit slots are respectively opened inside the two corners of the upper side of the front end of the fixed bracket, the two limit blocks are respectively fixedly connected to the upper front corners of the left and right ends of the terminal board, and the lower side of the terminal board is rotatably connected to the inside of the fixed bracket through two rotating columns and two rotating grooves, the two rotating columns are respectively fixedly connected to the lower sides of the left and right ends of the terminal board, and the two rotating grooves are respectively opened inside the lower sides of the inner walls of the left and right ends of the fixed bracket.

[0014] Preferably, fixed slide grooves are provided inside the rear sides of the left and right ends of the main unit, connecting clips are provided inside the two fixed slide grooves, locking clips are fixedly connected to the rear sides of the two connecting clips close to the center of the main unit, and the two locking clips are respectively clamped at the left and right ends of the fixed bracket, the main unit is clamped at the front end of the fixed bracket through the two connecting clips and the two locking clips, and hand grooves are provided inside the rear sides of the two connecting clips away from the center of the main unit.

[0015] Preferably, the connecting card is elastically connected to the inside of the fixed slide groove through multiple telescopic slides and locking springs, the multiple telescopic slides are fixedly connected to the front side of one end of the connecting card close to the center of the main machine, and the multiple telescopic slides pass through the inner wall of one end of the fixed slide groove close to the center of the main machine at one end close to the center of the main machine, and the multiple locking springs are respectively sleeved on the outside of the multiple locking springs and elastically connected to the inside of the main machine.

[0016] Compared with the prior art, the present invention provides a remote control device for building central air conditioning, which has the following beneficial effects:

[0017] 1. Multifunctional integrated host design: The host integrates the signal unit, control unit, distribution unit and display unit, realizing the reception and transmission of signals, remote and manual control of air conditioners, circuit distribution and real-time display of information.

[0018] 2. Innovative control button locking mechanism: The device supports remote control through wireless networks and the cloud, while retaining manual control buttons. The two are coordinated through the electromagnetic coil group and the magnetic linkage head to automatically lock the manual control button during remote control, avoiding conflicts between remote control and manual operation, improving the stability and safety of the system, and ensuring control flexibility.

[0019] 3. Integrated solution for heat dissipation and fixation: The heat dissipation slots at the upper and lower ends of the host effectively solve the heat dissipation problem of the equipment, while the design of the fixed bracket ensures the stable installation of the equipment on the wall.

[0020] 4. Convenient circuit connection and maintenance: The wiring slot and wiring bolt design on the wiring board simplifies the circuit connection process. At the same time, the detachable design of the host and the fixed bracket, as well as the rotatable design of the wiring board, greatly facilitate the maintenance of the equipment and the change of the circuit.

[0021] 5. Elastic connection design of connecting card plate and locking card head: The host is stably connected to the fixed bracket through the connecting card plate and locking card head. At the same time, a finger groove is designed for easy disassembly and maintenance, ensuring the installation stability and maintenance convenience of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the remote control device of the present invention.

[0023] Figure 2 It is a schematic diagram of the fixing bracket connection structure of the present invention.

[0024] Figure 3 It is a schematic diagram of the three-dimensional cross-sectional structure of the remote control device of the present invention.

[0025] Figure 4 For the present invention Figure 3 Enlarged schematic diagram at point A in the middle.

[0026] Figure 5 It is a schematic diagram of the linkage plate connection structure of the present invention.

[0027] Figure 6 It is a schematic diagram of the host connection structure of the present invention.

[0028] Figure 7 It is a schematic diagram of the connection structure of the wiring board of the present invention.

[0029] Figure 8 For the present invention Figure 7 Enlarged schematic diagram of point B in the middle.

[0030] Fig. 9 For the present invention Figure 6 Enlarged schematic diagram at point C in the middle.

[0031] In the figure: 1. host; 2. control button; 3. display screen; 4. heat sink; 5. fixed bracket; 6. terminal block; 7. terminal slot; 8. terminal bolt; 9. control circuit board; 10. limit baffle; 11. locking card plate; 12. locking card slot; 13. linkage plate; 14. magnetic linkage head; 15. magnetic suction plate; 16. electromagnetic coil group; 17. unlocking spring; 18. connecting plug; 19. adapter; 20. limit support plate; 21. limit card slot; 22. limit card block; 23. fixed slide slot; 24. connecting card plate; 25. locking card head; 26. finger groove; 27. telescopic slide column; 28. locking spring. DETAILED DESCRIPTION

[0032] 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.

[0033] The present invention provides Figure 1-Figure 9The remote control device for a central air conditioner in a building shown in the figure comprises a host 1, a plurality of control buttons 2 are arranged inside the lower side of the front end of the host 1, a display screen 3 is arranged inside the upper side of the front end of the host 1, heat dissipation slots 4 are arranged inside the upper and lower ends of the host 1, a fixed bracket 5 is connected to the rear end of the host 1, a wiring board 6 is rotatably connected to the lower side of the fixed bracket 5, a wiring slot 7 is opened inside the rear end of the wiring board 6, a plurality of wiring bolts 8 are arranged on the upper side of the wiring slot 7, and a plurality of wiring bolts 8 are threadedly connected inside the rear end of the wiring board 6, the central air conditioner is connected to the remote control device through a wiring harness, and the remote control device is connected to the cloud through a wireless network, and the customer can The cloud is connected through the client, and the remote control device is connected through the cloud and the wireless network. At the same time, the remote control device can be controlled through the client, and the central air conditioner can be controlled. Among them, the host 1 is internally provided with a signal unit, a control unit, a distribution unit and a display unit. The remote control device is connected to the wireless network and the cloud through the signal unit, and receives and sends signals through the signal unit. At the same time, the switch, mode, temperature, air volume, and swing air outlet of the central air conditioner are controlled through the control unit, and both remote control and manual control can be performed, and the information of the central air conditioner can be displayed through the display unit.

[0034] Preferably, a plurality of connection plugs 18 are penetrated backward from the upper side of the rear end of the host 1, a plurality of adapters 19 are arranged inside the upper side of the front end of the terminal block 6, and the plurality of connection plugs 18 are respectively plugged into the front ends of the plurality of adapters 19, the lower ends of the plurality of adapters 19 are all penetrated inside the inner wall of the upper end of the wiring slot 7, and the lower ends of the plurality of adapters 19 are all provided with connection holes, the wiring bolts 8 are threadedly connected inside the adapter 19, the lower side of the front end of the fixed bracket 5 is fixedly connected to the limited support plate 20, the host 1 can perform internal heat dissipation through the two heat dissipation slots 4 arranged inside the upper and lower ends, and can be fixed on the wall through the fixed bracket 5, and the host 1 is fixed to the wall through the limit The support plate 20 is placed at the front end of the fixed bracket 5 and the terminal board 6. The fixed bracket 5 is fixed to the wall by screws and fixed in front of the through-tube in the wall. The control unit manually controls the central air conditioner through multiple control buttons 2, and the distribution unit is connected to the circuit through multiple wiring bolts 8. The connecting wiring harness enters the wiring groove 7 through the through-tube in the wall and is connected to the wiring bolts 8 through the wiring groove 7. Multiple wiring bolts 8 fix the connecting wiring harness in the connection hole at the lower end of the adapter 19, and are connected to the host 1 by plugging the connecting plug 18 and the adapter 19. The display unit displays the information of the central air conditioner through the display screen 3.

[0035] Preferably, a control room is provided inside the lower side of the host 1, a control circuit board 9 is penetrated downwardly inside the front side of the inner wall at the upper end of the control room, and a plurality of control buttons 2 are connected to the lower side of the front end of the control circuit board 9, a limit baffle 10 is provided on the front side of the control circuit board 9, and the limit baffle 10 is fixedly connected to the inner wall at the upper end of the control room, a locking card plate 11 is provided on the lower side of the front end of the limit baffle 10, and the locking card plate 11 is slidably connected between the front end outer wall of the limit baffle 10 and the front end inner wall of the control room, a plurality of locking card slots 12 are penetrated front and back inside the upper end of the locking card plate 11, and the plurality of locking card slots 12 are respectively located at a plurality of On the lower side of the control button 2, when the signal unit receives the remote control signal, the locking card plate 11 slides upward, allowing the multiple locking card slots 12 to engage the lower ends of the multiple control buttons 2, thereby locking the multiple control buttons 2, so that the remote control device can lock the multiple control buttons 2 when performing remote control, making it impossible for the remote control device to perform manual control, thereby preventing the conflict between remote control and manual control and causing damage to the central air conditioner. After the remote control is ended, the locking card plate 11 returns to its original position again, unlocking the multiple control buttons 2, so that the remote control device can perform manual control again.

[0036] Preferably, a linkage plate 13 is fixedly connected to the lower side of the rear end of the locking card 11, a magnetic linkage head 14 is fixedly connected to the center of the upper end of the linkage plate 13, a magnetic attraction plate 15 is magnetically connected to the upper side of the magnetic linkage head 14, an electromagnetic coil group 16 is fixedly connected to the center of the upper end of the magnetic attraction plate 15, and the electromagnetic coil group 16 is connected to the inside of the host 1 through a wiring harness, unlocking springs 17 are provided on the left and right sides of the upper end of the linkage plate 13, and the upper ends of the two unlocking springs 17 are both in contact with the inner wall of the upper end of the control room, the magnetic linkage head 14 is slidably connected between the outer wall of the rear end of the control circuit board 9 and the inner wall of the rear end of the control room, wherein the electromagnetic coil group 16 is connected to the signal unit inside the host 1, and when the signal unit receives a remote control signal, the electromagnetic The coil group 16 is energized to generate magnetism, and the magnetic linkage head 14 on the lower side is sucked up through the magnetic attraction plate 15. The magnetic linkage head 14 drives the locking card plate 11 to slide upward through the linkage plate 13, so that the multiple locking slots 12 inside the locking card plate 11 are connected to the lower ends of the multiple control buttons 2, and the multiple control buttons 2 are locked. When the remote control is over, the signal unit cannot receive the remote control signal, the electromagnetic coil group 16 is powered off and loses its magnetism, and the linkage plate 13 and the magnetic linkage head 14 rebound downward under the action of the two unlocking springs 17 on both sides, and at the same time drive the locking card plate 11 and the multiple locking slots 12 to slide downward, thereby releasing the lock on the multiple control buttons 2.

[0037] Preferably, fixed grooves 23 are provided inside the rear sides of the left and right ends of the main unit 1, and connecting cards 24 are provided inside the two fixed grooves 23. The two connecting cards 24 are fixedly connected to the rear sides of one end of the center of the main unit 1 with locking cards 25, and the two locking cards 25 are respectively clamped at the left and right ends of the fixed bracket 5, so that the main unit 1 can be clamped at the front end of the fixed bracket 5 through the connecting cards 24 and the locking cards 25 on both sides, and can be positioned through the limiting support plate 20, the two connecting cards 24 and the two locking cards 25, so that multiple connecting plugs 18 can be smoothly plugged with the corresponding multiple adapters 19.

[0038] Preferably, the two connecting card plates 24 are provided with a hand-gripping groove 26 at the rear side of the end away from the center of the host 1, and the connecting card plates 24 are elastically connected to the inside of the fixed slide groove 23 through multiple telescopic slides 27 and locking springs 28. Multiple telescopic slides 27 are fixedly connected to the front side of the end of the connecting card plate 24 close to the center of the host 1, and multiple telescopic slides 27 are close to the center of the host 1. The end of the fixed slide groove 23 close to the center of the host 1 passes through the inner wall of the fixed slide groove 23, and the multiple locking springs 28 are respectively sleeved on the outside of the multiple locking springs 28 and elastically connected to the inside of the host 1. , so that the two connecting cards 24 and the two locking cards 25 can be elastically connected to the two sides of the fixed bracket 5 through the telescopic slide column 27 and the locking spring 28, so that the connecting card plate 24 and the locking card head 25 can be stably connected to the fixed bracket 5, and the connecting card plate 24 and the locking card head 25 can be pulled to both sides through the finger groove 26 to release the connection between the connecting card plate 24 and the locking card head 25 and the fixed bracket 5, so that the host 1 can be firmly fixed to the front end of the fixed bracket 5 for normal operation, and can also be easily removed from the front end of the fixed bracket 5 for maintenance.

[0039] Preferably, the upper side of the wiring board 6 is connected to the fixed bracket 5 through two limiting card slots 21 and two limiting card blocks 22, the two limiting card slots 21 are respectively opened inside the two corners of the upper side of the front end of the fixed bracket 5, and the two limiting card blocks 22 are respectively fixedly connected to the upper front corners of the left and right ends of the wiring board 6, and the lower side of the wiring board 6 is rotatably connected to the inside of the fixed bracket 5 through two rotating columns and two rotating grooves, the two rotating columns are respectively fixedly connected to the lower sides of the left and right ends of the wiring board 6, and the two rotating grooves are respectively opened inside the lower sides of the inner walls of the left and right ends of the fixed bracket 5. In the process of circuit connection of the remote control device, the host 1 can be removed from the front end of the fixed bracket 5 by releasing the connection between the connecting card plate 24 and the locking card head 25 and the fixed bracket 5, and the wiring board 6 is rotated by the rotating column and the two rotating grooves, so that the wiring slot 7 and multiple wiring bolts 8 at the rear end of the wiring board 6 are exposed, and the connection harness inside the wiring slot 7 is exposed, which can make circuit connection and change more convenient, and the host 1 can be disassembled and assembled with the fixed bracket 5, so that the remote control device is more convenient to install and maintain.

[0040] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is 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 remote control device for a building central air conditioner, characterized in that: The invention comprises a host (1), wherein a plurality of control buttons (2) are arranged inside the lower front side of the host (1), a display screen (3) is arranged inside the upper front side of the host (1), heat dissipation grooves (4) are arranged inside the upper and lower ends of the host (1), a fixed bracket (5) is connected to the rear end of the host (1), a wiring board (6) is rotatably connected to the lower side of the fixed bracket (5), a wiring groove (7) is provided inside the rear end of the wiring board (6), a plurality of wiring bolts (8) are arranged on the upper side of the wiring groove (7), and the plurality of wiring bolts (8) are threadedly connected inside the rear end of the wiring board (6).

2. A building central air conditioning remote control device according to claim 1, characterized in that: A control room is provided inside the lower side of the host (1); a control circuit board (9) is downwardly penetrated through the front side of the inner wall at the upper end of the control room, and a plurality of control buttons (2) are connected to the lower side of the front end of the control circuit board (9); a limit baffle (10) is provided on the front side of the control circuit board (9), and the limit baffle (10) is fixedly connected to the inner wall at the upper end of the control room; a locking card (11) is provided on the lower side of the front end of the limit baffle (10), and the locking card (11) is slidably connected between the outer wall at the front end of the limit baffle (10) and the inner wall at the front end of the control room.

3. A building central air conditioning remote control device according to claim 2, characterized in that: A plurality of locking slots (12) are formed inside the upper end of the locking card plate (11) and penetrate the inner portion thereof from front to back, and the plurality of locking slots (12) are respectively located below the plurality of control buttons (2); a linkage plate (13) is fixedly connected to the lower side of the rear end of the locking card plate (11), and the linkage plate (13) is in contact with the inner wall of the lower end of the control chamber; a magnetic linkage head (14) is fixedly connected to the center of the upper end of the linkage plate (13).

4. A building central air conditioning remote control device according to claim 3, characterized in that: The upper side of the magnetic linkage head (14) is magnetically connected to a magnetic attraction plate (15), the center of the upper end of the magnetic attraction plate (15) is fixedly connected to an electromagnetic coil group (16), and the upper end of the electromagnetic coil group (16) is fixedly connected to the center of the upper inner wall of the control room and is connected to the inside of the host (1) through a wiring harness.

5. A building central air conditioning remote control device according to claim 4, characterized in that: Unlocking springs (17) are arranged on both left and right sides of the upper end of the linkage plate (13), and the upper ends of the two unlocking springs (17) are in contact with the inner wall of the upper end of the control chamber. The linkage plate (13), the magnetic linkage head (14), the magnetic attraction plate (15), the electromagnetic coil group (16) and the two unlocking springs (17) are all located at the rear end of the control circuit board (9), and the magnetic linkage head (14) is slidably connected between the rear end outer wall of the control circuit board (9) and the rear end inner wall of the control chamber.

6. A building central air conditioning remote control device according to claim 1, characterized in that: A plurality of connection plugs (18) are inserted backwards through the interior of the upper rear side of the main unit (1), a plurality of adapters (19) are arranged inside the upper front side of the wiring board (6), and the plurality of connection plugs (18) are respectively plugged into the interior of the front ends of the plurality of adapters (19), and the main unit (1) is connected to the wiring board (6) in a circuit via the plurality of connection plugs (18) and the plurality of adapters (19).

7. A building central air conditioning remote control device according to claim 6, characterized in that: The lower ends of the plurality of adapters (19) are all inserted into the inner wall of the upper end of the wiring slot (7), and a wiring hole is opened in the lower ends of the plurality of adapters (19). The wiring bolt (8) is threadedly connected to the inside of the adapter (19) and is inserted into the inside of the wiring hole. The lower side of the front end of the fixed bracket (5) is fixedly connected to a limit support plate (20), and the main unit (1) is located at the upper end of the limit support plate (20).

8. A building central air conditioning remote control device according to claim 1, characterized in that: The upper side of the wiring board (6) is connected to the fixed bracket (5) through two limit slots (21) and two limit blocks (22), the two limit slots (21) are respectively arranged inside the two corners of the upper side of the front end of the fixed bracket (5), the two limit blocks (22) are respectively fixedly connected to the upper front corners of the left and right ends of the wiring board (6), and the lower side of the wiring board (6) is rotatably connected to the inside of the fixed bracket (5) through two rotating columns and two rotating slots, the two rotating columns are respectively fixedly connected to the lower sides of the left and right ends of the wiring board (6), and the two rotating slots are respectively arranged inside the lower sides of the inner walls of the left and right ends of the fixed bracket (5).

9. A building central air conditioning remote control device according to claim 1, characterized in that: The host (1) is provided with a fixed slide groove (23) at the rear sides of both left and right ends, and a connecting card plate (24) is provided inside the two fixed slide grooves (23). The two connecting card plates (24) are fixedly connected to a locking card head (25) at the rear sides of the ends close to the center of the host (1), and the two locking card heads (25) are respectively clamped at the left and right ends of the fixed bracket (5). The host (1) is clamped at the front end of the fixed bracket (5) through the two connecting card plates (24) and the two locking card heads (25), and a hand-gripping groove (26) is provided inside the rear sides of the ends of the two connecting card plates (24) away from the center of the host (1).

10. A building central air conditioning remote control device according to claim 9, characterized in that: The connecting card plate (24) is elastically connected to the inside of the fixed slide groove (23) through a plurality of telescopic slides (27) and locking springs (28); the plurality of telescopic slides (27) are fixedly connected to the front side of one end of the connecting card plate (24) close to the center of the host (1); and the ends of the plurality of telescopic slides (27) close to the center of the host (1) penetrate the inner wall of the fixed slide groove (23) close to the center of the host (1); the plurality of locking springs (28) are respectively sleeved on the outside of the plurality of locking springs (28) and elastically connected to the inside of the host (1).

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