Color image receiving anti-interference multi-channel plug

Abstract

The invention discloses a color image receiving anti-interference multi-channel plug, and relates to the technical field of plugs, the color image receiving anti-interference multi-channel plug comprises a first connecting piece and a second connecting piece, an insertion core is slidably connected with the inner wall of an insertion cylinder to realize signal transmission, and a shielding assembly and a protection assembly are arranged to improve the anti-interference capability and protect the whole device. A first shielding cylinder, a moving shielding cylinder and a second shielding cylinder are arranged in the shielding assembly and are connected to the surfaces of the insertion cylinder and the insertion core in a sleeving mode to jointly form a shielding structure, the first shielding cylinder is connected with the second shielding cylinder through a telescopic spring, it is guaranteed that the insertion core and the insertion cylinder are effectively wrapped by a shielding layer in the using process, and the anti-interference capacity of signals is enhanced; the protection assembly comprises a first fixing sleeve and a second fixing sleeve which are fixed outside the shielding layer and the insertion core and are fixed through cooperation of the assembly plate and the assembly groove, and the design not only protects the shielding layer from corrosion, but also prevents poor contact caused by pulling of the plug, and ensures stable transmission of electric signals.

Description

Technical Field

[0001] The invention relates to the technical field of plugs, in particular to a multi-channel plug for color image reception and anti-interference. Background Art

[0002] Color image receiving multi-channel plug usually refers to the input interface of video equipment or TV, which is used to receive signals from multiple color channels. Color image receiving can use metal plugs. Metal interfaces are usually used for connecting digital devices, such as cameras, camcorders or some video acquisition devices. These devices can transmit video data through metal plug interfaces, and modern cameras or camcorders support multi-channel data transmission, including different channels of color images;

[0003] At present, most metal plugs are used to prevent interference, and the direct contact between the metal plug and the socket can achieve the effect of electromagnetic shielding and anti-interference. The socket and plug shells are made of metal, and they are well grounded while ensuring good contact with each other to achieve anti-interference.

[0004] However, the plug will be pulled back and forth when in use, and there will be corrosive gases in the environment where it is used, and the material of the plug shell is mostly copper. After a period of use, due to corrosion and wear between metals, the matching gap between the plug and the socket becomes larger, resulting in poor contact and sparking, which affects the transmission of electrical signals inside the plug. It is necessary to improve the existing technology. To this end, we propose a multi-channel plug for color image reception with anti-interference to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a multi-channel plug for color image reception and anti-interference, so as to solve the problems raised in the above background technology.

[0006] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme:

[0007] A multi-channel plug for color image reception and anti-interference, provided by the present invention, comprises a first connector, a second connector is provided at one end of the first connector, the first connector comprises a first fixed disk, the second connector comprises a second fixed disk, the ends of the first fixed disk and the second fixed disk away from each other are electrically connected with connecting wires, a core and a sleeve are fixedly connected on the sides of the first fixed disk and the second fixed disk close to each other, the outer diameter of the core matches the inner diameter of the sleeve, the core is slidably connected to the inner wall of the sleeve, the axes of the core, the sleeve, the first fixed disk and the second fixed disk coincide, a shielding component for enhancing the overall anti-interference ability is provided on the outer surfaces of the core and the sleeve, a protective component for ensuring the overall device is sleeved on the surface of the shielding component, the shielding component comprises a first shielding cylinder, one end of the first shielding cylinder is fixedly connected to the second fixed disk, a plurality of mounting grooves are opened on the surface of one end of the first shielding cylinder close to the first fixed disk, a telescopic spring is built in the mounting groove, connecting cylinders are sleeved on both ends of the telescopic spring, and one end of the connecting cylinder away from the telescopic spring is fixedly connected to the bottom of the inner cavity of the mounting groove , another end of the connecting tube away from the telescopic spring is fixedly connected to a connecting seat, and the end of the connecting seat away from the axis of the first shielding tube is fixedly connected to a moving shielding tube, and the outer surface of the moving shielding tube is sleeved with a second shielding tube, and the outer surface of the moving shielding tube is slidably connected to the inner wall of the second shielding tube, and the protection component includes a first fixed sleeve, one end of the first fixed sleeve is fixedly connected to the second fixed disk, and a plurality of assembly grooves are opened around the end of the first fixed sleeve close to the plug core, and an assembly chamber is opened on both sides of the end of the assembly slot close to the first fixed sleeve, and fixed cylinders are fixedly connected on both sides of the inner wall of the assembly chamber, and the fixed cylinders on both sides are symmetrically distributed along the axis of the assembly chamber, and a rotating roller is built in the fixed cylinder, and a coil spring is sleeved at both ends of the rotating roller, and a toggle plate and a moving plate are sleeved on the surface of the rotating roller, and the ends of the toggle plate and the moving plate close to each other are fixedly connected to the rotating roller, and the toggle plate and the moving plate surround the rotating roller to form a seesaw structure, and the end of the moving plate away from the toggle plate is fixedly connected to a card seat, and an assembly plate is built in the assembly slot, and the assembly plate is provided with card slots matching the card seat on both sides of the assembly plate near the bottom of the assembly slot.

[0008] Preferably, the first shielding tube is sleeved on the surface of the inserting tube, the plurality of mounting grooves are evenly distributed around the axis of the first shielding tube, and the connecting tubes at both ends are symmetrically distributed along the axis of the telescopic spring.

[0009] Preferably, the movable shielding cylinder is sleeved on the surface of the first shielding cylinder, the first shielding cylinder is slidably connected to the inner wall of the movable shielding cylinder, and a plurality of guide strips are fixedly connected to the outer surface of the movable shielding cylinder, and the plurality of guide strips are evenly distributed around the axis of the movable shielding cylinder.

[0010] Preferably, a plurality of guide grooves matching the guide bars are formed on the inner wall of the second shielding tube, the guide bars are placed in the guide grooves, and the guide bars are slidably connected to the guide groove walls.

[0011] Preferably, one end of the second shielding cylinder away from the first shielding cylinder is fixedly connected to the first fixed disk, the second shielding cylinder is sleeved on the surface of the insert, and the axes of the second shielding cylinder, the first shielding cylinder and the moving shielding cylinder coincide.

[0012] Preferably, the first fixing sleeve is sleeved on the surface of the first shielding cylinder, the first fixing sleeve coincides with the axis of the first shielding cylinder, and the plurality of assembly grooves are evenly distributed around the axis of the first fixing sleeve.

[0013] Preferably, the assembly chambers on both sides are symmetrically distributed along the axis of the assembly groove, and both ends of the rotating roller are rotatably connected to the bottom of the inner cavity of the fixed cylinder.

[0014] Preferably, the coil springs at both ends are symmetrically distributed along the axis of the rotating roller, the coil spring is placed in a fixed cylinder, one end of the coil spring is fixedly connected to the inner wall of the fixed cylinder, and the other end of the coil spring is fixedly connected to the surface of the rotating roller.

[0015] Preferably, the assembly plate is slidably connected to the wall of the assembly groove, and the clamping grooves on both sides are symmetrically distributed along the axis of the assembly plate.

[0016] Preferably, one end of the assembly plate away from the assembly groove is fixedly connected to a second fixing sleeve, the second fixing sleeve is sleeved on the surface of the second shielding cylinder, and one end of the second fixing sleeve away from the first fixing sleeve is fixedly connected to the first fixing plate.

[0017] Compared with the prior art, one or more of the above technical solutions have the following beneficial effects:

[0018] The plug of the present invention includes a first connecting member and a second connecting member, which are connected by a series of fixed disks, a core and a sleeve, the axes of the core and the sleeve coincide, and the core is slidably connected to the inner wall of the sleeve to realize signal transmission. A shielding component and a protection component are provided to improve the anti-interference ability and protect the overall device. The shielding component is provided with a first shielding cylinder, a movable shielding cylinder and a second shielding cylinder, which are sleeved on the surface of the sleeve and the core to form a shielding structure together. The first shielding cylinder is connected to the second shielding cylinder by a telescopic spring to ensure that the shielding layer effectively covers the core and the sleeve during use, thereby enhancing the anti-interference ability of the signal.

[0019] The protection component includes a first fixing sleeve and a second fixing sleeve, which are fixed to the outside of the shielding layer and the core, and are fixed by the cooperation of the assembly plate and the assembly groove. This design not only protects the shielding layer from corrosion, but also prevents poor contact of the plug due to pulling, thereby ensuring stable transmission of electrical signals. When the plug is in use, the shielding layer can effectively prevent electromagnetic interference, ensure stable transmission of signals, and extend the service life. The multi-layer shielding design and fixed protection mechanism enable the plug to work stably in complex environments, reduce failure rates, and improve reliability. The multi-channel plug for color image reception and anti-interference has effectively improved its anti-interference ability and service life through the multi-layer design of the shielding layer and the protection component, and is suitable for signal transmission applications that require high stability and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the overall internal structure of the present invention;

[0023] Figure 3 is a schematic structural diagram of a first connecting member of the present invention;

[0024] Figure 4 is a schematic structural diagram of a second connecting member of the present invention;

[0025] Figure 5 It is a schematic diagram of the assembly structure of the moving cylinder and the first shielding cylinder of the present invention;

[0026] Figure 6 It is a schematic diagram of the structure of the shielding assembly of the present invention;

[0027] Figure 7 The present invention Figure 3 The enlarged structural diagram at A in the middle;

[0028] Figure 8 It is a schematic diagram of the protection component structure of the present invention.

[0029] In the figure:

[0030] 1. First connecting member; 101. First fixed disk; 102. Connecting wire; 103. Insert core; 2. Second connecting member; 201. Second fixed disk; 202. Insert tube; 3. Shielding assembly; 301. First shielding tube; 302. Mounting groove; 303. Telescopic spring; 304. Connecting tube; 305. Connecting seat; 306. Moving shielding tube; 307. Guide strip; 308. Second shielding tube; 309. Guide groove; 4. Protective assembly; 401. First fixed sleeve; 402. Assembly groove; 403. Assembly chamber; 404. Fixed sleeve; 405. Rotating roller; 406. Coil spring; 407. Toggle plate; 408. Moving plate; 409. Holder; 410. Assembly plate; 411. Slot; 412. Second fixed sleeve. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0032] See also Figure 1-Figure 8 The present invention provides a multi-channel plug for color image reception and anti-interference, comprising a first connector 1, a second connector 2 is arranged at one end of the first connector 1, the first connector 1 comprises a first fixed disk 101, the second connector 2 comprises a second fixed disk 201, the ends of the first fixed disk 101 and the second fixed disk 201 that are away from each other are both electrically connected with a connecting wire 102, the surfaces of the first fixed disk 101 and the second fixed disk 201 that are close to each other are respectively fixedly connected with a core plug 103 and a plug sleeve 202, the outer diameter of the core plug 103 matches the inner diameter of the plug sleeve 202, the core plug 103 is slidably connected to the inner wall of the plug sleeve 202, the axes of the core plug 103, the plug sleeve 202, the first fixed disk 101 and the second fixed disk 201 coincide, the outer surfaces of the core plug 103 and the plug sleeve 202 are arranged with a shielding component 3 for enhancing the overall anti-interference ability, the surface of the shielding component 3 is sleeved with a protective component 4 for ensuring the overall device, the core plug 103 and the plug sleeve 202 provided with a signal transmission connection can be connected, and signal transmission is realized under the cooperation and protection of multiple components.

[0033] In order to improve the anti-interference performance of the plug, and to ensure that the shielding layer can still cover the plug core 103 and the plug tube 202 well during daily use, a first shielding cylinder 301 is provided in the shielding component 3, one end of the first shielding cylinder 301 is fixedly connected to the second fixed disk 201, the first shielding cylinder 301 is sleeved on the surface of the plug tube 202, and a plurality of mounting grooves 302 are provided on the surface of one end of the first shielding cylinder 301 close to the first fixed disk 101, and the plurality of mounting grooves 302 are evenly distributed around the axis of the first shielding cylinder 301, and the mounting grooves 302 are built-in The telescopic spring 303 has connecting tubes 304 sleeved at both ends of the telescopic spring 303. The connecting tubes 304 at both ends are symmetrically distributed along the axis of the telescopic spring 303. One end of the connecting tube 304 away from the telescopic spring 303 is fixedly connected to the bottom of the inner cavity of the mounting groove 302. The other end of the connecting tube 304 away from the telescopic spring 303 is fixedly connected to a connecting seat 305. The end of the connecting seat 305 away from the axis of the first shielding tube 301 is fixedly connected to a moving shielding tube 306. The moving shielding tube 306 is sleeved on the surface of the first shielding tube 301. The first shielding tube 30 1 is slidably connected to the inner wall of the moving shielding cylinder 306, a plurality of guide strips 307 are fixedly connected to the outer surface of the moving shielding cylinder 306, and the plurality of guide strips 307 are evenly distributed around the axis of the moving shielding cylinder 306, a second shielding cylinder 308 is sleeved on the outer surface of the moving shielding cylinder 306, the outer surface of the moving shielding cylinder 306 is slidably connected to the inner wall of the second shielding cylinder 308, a plurality of guide grooves 309 matching the guide strips 307 are opened on the inner wall of the second shielding cylinder 308, the guide strips 307 are placed in the guide grooves 309, and the guide strips 307 and the groove walls of the guide grooves 309 are slidably connected. Dynamic connection, one end of the second shielding tube 308 away from the first shielding tube 301 is fixedly connected to the first fixed disk 101, the second shielding tube 308 is sleeved on the surface of the core 103, the axes of the second shielding tube 308, the first shielding tube 301 and the movable shielding tube 306 coincide, and the movable shielding tube 306 on the surface of the first shielding tube 301 is sleeved on the surface of the second shielding tube 308 under the action of the telescopic spring 303, so that there is a margin between the shielding layers. In subsequent use, the shielding layer can completely cover the core 103 and the insert tube 202 to perform signal interference protection.

[0034] In order to protect the overall device, prevent the shielding layer from being corroded, and prevent the ferrule 103 and the ferrule 202 from being pulled to cause poor contact, a first fixing sleeve 401 is provided in the protection component 4, one end of the first fixing sleeve 401 is fixedly connected to the second fixing disk 201, the first fixing sleeve 401 is sleeved on the surface of the first shielding tube 301, the first fixing sleeve 401 coincides with the axis of the first shielding tube 301, a plurality of assembly grooves 402 are provided around one end of the first fixing sleeve 401 close to the ferrule 103, the plurality of assembly grooves 402 are evenly distributed around the axis of the first fixing sleeve 401, assembly chambers 403 are provided on both sides of one end of the assembly groove 402 close to the first fixing sleeve 401, the assembly chambers 403 on both sides are symmetrically distributed along the axis of the assembly groove 402, and the assembly chambers 403 Fixed cylinders 404 are fixedly connected to both sides of the inner wall, and the fixed cylinders 404 on both sides are symmetrically distributed along the axis of the assembly chamber 403. A rotating roller 405 is built into the fixed cylinder 404, and both ends of the rotating roller 405 are rotatably connected to the bottom of the inner cavity of the fixed cylinder 404. Coil springs 406 are sleeved at both ends of the rotating roller 405, and the coil springs 406 at both ends are symmetrically distributed along the axis of the rotating roller 405. The coil spring 406 is placed in the fixed cylinder 404, and one end of the coil spring 406 is fixedly connected to the inner wall of the fixed cylinder 404, and the other end of the coil spring 406 is fixedly connected to the surface of the rotating roller 405. A toggle plate 407 and a moving plate 408 are sleeved on the surface of the rotating roller 405, and the end of the toggle plate 407 and the moving plate 408 that are close to each other is fixedly connected to the rotating roller 405, and the toggle plate 407 and the moving plate 408 are surrounded by The rotating roller 405 forms a seesaw structure, and the end of the moving plate 408 away from the toggle plate 407 is fixedly connected to the card seat 409, and the assembly groove 402 is built with an assembly plate 410, and the assembly plate 410 is slidably connected to the groove wall of the assembly groove 402. The assembly plate 410 is provided with card slots 411 matching the card seat 409 on both sides of the groove bottom of the assembly groove 402, and the card slots 411 on both sides are symmetrically distributed along the axis of the assembly plate 410. The end of the assembly plate 410 away from the assembly groove 402 is fixedly connected to the second fixing sleeve 412, and the second fixing sleeve 412 is sleeved on the surface of the second shielding cylinder 308. The end of the second fixing sleeve 412 away from the first fixing sleeve 401 is fixedly connected to the first fixing disk 101. In the anti-interference plug, the first fixing sleeve 401 and the second fixing sleeve The sleeve 412 is arranged on the outside of the shielding layer and the plug core 103, and the two fixing sleeves can cooperate with the assembly groove 402 through the assembly plate 410. When the assembly plate 410 enters the assembly groove 402, the toggle plate 407 is squeezed so that the holder 409 on the surface of the moving plate 408 enters the slots 411 on both sides of the assembly plate 410 and is fixed. The two fixing sleeves are effectively connected so that the ends of the two are against each other. The fixing sleeve can play a role of reinforcement and protection. On the one hand, it prevents corrosive gas from directly contacting the shielding layer and preventing the shielding layer from being corroded. On the other hand, it makes the two connectors contact more closely and play a better shielding role. At the same time, it can also prevent the poor contact caused by the plug being pulled off, thereby ensuring the stable transmission of the internal electrical signal.The first shielding tube 301 and the second shielding tube 308 and the moving shielding tube 306 outside the two can play the role of electromagnetic shielding and anti-interference. Compared with the prior art, the above-mentioned plug can transmit signals more stably and has a longer service life.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A multi-channel plug for color image reception and anti-interference, characterized in that: The invention comprises a first connecting member (1), wherein a second connecting member (2) is arranged at one end of the first connecting member (1), wherein the first connecting member (1) comprises a first fixed disk (101), and the second connecting member (2) comprises a second fixed disk (201), and ends of the first fixed disk (101) and the second fixed disk (201) which are far from each other are both electrically connected to a connecting wire (102), and surfaces of the first fixed disk (101) and the second fixed disk (201) which are close to each other are respectively fixedly connected to an insert core (103) and an insert tube (202), wherein the outer diameter of the insert core (103) matches the inner diameter of the insert tube (202), the insert core (103) is slidably connected to the inner wall of the insert tube (202), and the insert core (103), the insert tube (202), and the insert core (103) are connected to each other in a manner that is close to each other. The axes of the first fixed disk (101) and the second fixed disk (201) coincide with each other; the outer surfaces of the insert core (103) and the insert tube (202) are provided with a shielding component (3) for enhancing the overall anti-interference capability; the surface of the shielding component (3) is sleeved with a protection component (4) for ensuring the overall device; the shielding component (3) comprises a first shielding tube (301); one end of the first shielding tube (301) is fixedly connected to the second fixed disk (201); a plurality of mounting grooves (302) are provided on the surface of one end of the first shielding tube (301) close to the first fixed disk (101); a telescopic spring (303) is built in the mounting groove (302); both ends of the telescopic spring (303) are sleeved with a connecting tube (304); and one of the first shielding tubes (301) is provided with a plurality of mounting grooves (302); One end of the connecting tube (304) away from the telescopic spring (303) is fixedly connected to the bottom of the inner cavity of the installation groove (302); another end of the connecting tube (304) away from the telescopic spring (303) is fixedly connected to a connecting seat (305); one end of the connecting seat (305) away from the axis of the first shielding tube (301) is fixedly connected to a movable shielding tube (306); the outer surface of the movable shielding tube (306) is sleeved with a second shielding tube (308); the outer surface of the movable shielding tube (306) is slidably connected to the inner wall of the second shielding tube (308); the protection component (4) comprises a first fixed sleeve (401); one end of the first fixed sleeve (401) is fixedly connected to the second fixed disk (201); the first fixed sleeve (401) 01) A plurality of assembly grooves (402) are provided around one end close to the insert core (103), and assembly chambers (403) are provided on both sides of one end of the assembly groove (402) close to the first fixed sleeve (401), and fixed cylinders (404) are fixedly connected to both sides of the inner wall of the assembly chamber (403), and the fixed cylinders (404) on both sides are symmetrically distributed along the axis of the assembly chamber (403), and a rotating roller (405) is built in the fixed cylinder (404), and coil springs (406) are sleeved at both ends of the rotating roller (405), and a toggle plate (407) and a moving plate (408) are sleeved on the surface of the rotating roller (405), and the ends of the toggle plate (407) and the moving plate (408) close to each other are fixedly connected to the rotating roller (405),The toggle plate (407) and the moving plate (408) surround the rotating roller (405) to form a seesaw structure, and the end of the moving plate (408) away from the toggle plate (407) is fixedly connected to a holder (409), and the assembly groove (402) is built with an assembly plate (410), and the assembly plate (410) is provided with a card slot (411) matching the holder (409) on both sides of the groove near the bottom of the assembly groove (402).

2. The multi-channel plug for color image reception and anti-interference according to claim 1, characterized in that: The first shielding tube (301) is sleeved on the surface of the inserting tube (202), the plurality of mounting grooves (302) are evenly distributed around the axis of the first shielding tube (301), and the connecting tubes (304) at both ends are symmetrically distributed along the axis of the telescopic spring (303).

3. The multi-channel plug for color image reception and anti-interference according to claim 1, characterized in that: The movable shielding cylinder (306) is sleeved on the surface of the first shielding cylinder (301), the first shielding cylinder (301) is slidably connected to the inner wall of the movable shielding cylinder (306), and a plurality of guide strips (307) are fixedly connected to the outer surface of the movable shielding cylinder (306), and the plurality of guide strips (307) are evenly distributed around the axis of the movable shielding cylinder (306).

4. The multi-channel plug for color image reception and anti-interference according to claim 3, characterized in that: The inner wall of the second shielding cylinder (308) is provided with a plurality of guide grooves (309) matching the guide strips (307), the guide strips (307) are placed in the guide grooves (309), and the guide strips (307) are slidably connected to the groove walls of the guide grooves (309).

5. The multi-channel plug for color image reception and anti-interference according to claim 1, characterized in that: One end of the second shielding cylinder (308) away from the first shielding cylinder (301) is fixedly connected to the first fixed disk (101), the second shielding cylinder (308) is sleeved on the surface of the insert (103), and the axes of the second shielding cylinder (308), the first shielding cylinder (301) and the movable shielding cylinder (306) coincide.

6. The multi-channel plug for color image reception and anti-interference according to claim 1, characterized in that: The first fixing sleeve (401) is sleeved on the surface of the first shielding cylinder (301), the first fixing sleeve (401) coincides with the axis of the first shielding cylinder (301), and the plurality of assembly grooves (402) are evenly distributed around the axis of the first fixing sleeve (401).

7. The multi-channel plug for color image reception and anti-interference according to claim 1, characterized in that: The assembly chambers (403) on both sides are symmetrically distributed along the axis of the assembly groove (402), and the two ends of the rotating roller (405) are rotatably connected to the bottom of the inner cavity of the fixed cylinder (404).

8. The multi-channel plug for color image reception and anti-interference according to claim 1, characterized in that: The coil springs (406) at both ends are symmetrically distributed along the axis of the rotating roller (405), the coil spring (406) is placed in the fixed cylinder (404), one end of the coil spring (406) is fixedly connected to the inner wall of the fixed cylinder (404), and the other end of the coil spring (406) is fixedly connected to the surface of the rotating roller (405).

9. The multi-channel plug for color image reception and anti-interference according to claim 1, characterized in that: The assembly plate (410) is slidably connected to the groove wall of the assembly groove (402), and the clamping grooves (411) on both sides are symmetrically distributed along the axis of the assembly plate (410).

10. The multi-channel plug for color image reception and anti-interference according to claim 1, characterized in that: One end of the assembly plate (410) away from the assembly groove (402) is fixedly connected to a second fixing sleeve (412), the second fixing sleeve (412) is sleeved on the surface of the second shielding cylinder (308), and one end of the second fixing sleeve (412) away from the first fixing sleeve (401) is fixedly connected to the first fixing plate (101).

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