A waterproof tail cable with good waterproof effect

Abstract

The present invention discloses a waterproof tail cable with good waterproof effect, which relates to the technical field of waterproof tail cables. The waterproof tail cable with good waterproof effect includes a tail cable body and a connector, the left end of the connector is connected to the backbone optical cable line, the tail cable body can be connected to the right end of the connector, and the right end of the connector is provided with a seal, and the seal includes a screw-in nut and a sealing plate. The waterproof tail cable with good waterproof effect can be used to fix the tail cable body by providing a screw-in nut, a sealing plate and a sealing through-hole. By providing a shielding circular plate, the sealing effect of other sealing through-holes can be ensured when a small number of tail cable bodies are installed. At the same time, the driving plate, the hollow rubber ring and the piston are provided to reduce the friction between the tail cable body and the sealing through-hole during installation, and achieve a contact sealing effect between the sealing through-hole and the tail cable body after installation, thereby preventing external moisture and water from entering the connector through the sealing through-hole.

Description

Technical Field

[0001] The present invention relates to the technical field of waterproof pigtail cables, in particular to a waterproof pigtail cable with good waterproof effect. Background Art

[0002] A waterproof pigtail cable refers to a cable used to connect a backbone optical cable line and an optical receiver. It is generally made of waterproof material and is used in conjunction with a connector. The connector can be used to connect the backbone optical cable line and the pigtail cable body. The utility model patent with patent announcement number CN210742570U discloses a waterproof pigtail cable with good waterproof effect, comprising a polyethylene outer sheath, an inner cavity of the polyethylene outer sheath being provided with a steel wire armor, an inner sheath being provided on the side of the steel wire armor away from the polyethylene outer sheath, a waterproof filler being provided on the side of the inner sheath away from the steel wire armor, and an optical fiber conductor body being provided in the inner cavity of the waterproof filler. The utility model achieves the advantages of good waterproof effect and high temperature resistance by arranging the mutual cooperation of polyethylene outer sheath, steel wire armor, inner sheath, waterproof filler, optical fiber conductor body, insulation layer, polyvinyl chloride inner layer and central reinforcement, and solves the problems of poor waterproof effect and poor high temperature resistance of existing waterproof tail cables. The waterproof tail cable will not be damaged by high and low temperature differences when used for a long time, and water vapor will not enter the interior of the waterproof tail cable, which will not reduce the service life and can perform normal data transmission.

[0003] Although the above-mentioned utility model patent can achieve a waterproof effect on the tail cable body, since the number of tail cables required to be connected to the connector may change, in actual use, a certain gap is generally provided at the connection between the connector and the tail cable to accommodate the installation of different numbers of tail cable bodies. However, this will cause external moisture or water to enter the interior of the connector through the gap, thereby causing damage to the connection between the connector and the tail cable body, which has certain defects. Summary of the Invention

[0004] (1) Technical problems solved

[0005] In response to the deficiencies in the prior art, the present invention provides a waterproof pigtail cable with good waterproof effect, which solves the problem raised in the above background technology that since the number of pigtail cables required to be connected to the connector may change, a certain gap is generally provided at the connection between the connector and the pigtail cable during actual use to accommodate the installation of different numbers of pigtail cable bodies. However, this will cause external moisture or water to enter the interior of the connector through the gap, thereby causing damage to the connection between the connector and the pigtail cable body.

[0006] (2) Technical solution

[0007] To achieve the above purpose, the present invention is implemented through the following technical solutions: a waterproof tail cable with good waterproof effect, including a tail cable body and a connector, the left end of the connector is connected to the backbone optical cable line, the tail cable body can be connected to the right end of the connector, the right end of the connector is provided with a seal, the seal includes a screw-in nut and a sealing plate, the inner side of the screw-in nut is threadedly connected to the surface of the right end of the connector, the screw-in nut and the threaded fit of the right end of the connector can achieve the installation effect of the screw-in nut, the sealing plate is fixedly connected to the right side of the screw-in nut by a connecting rod, and a through-hole is opened between the two sides of the sealing plate. There are multiple sealing through holes, which can be used to seal the tail cable body. A driving plate is provided in contact with the left side of the sealing plate, and multiple return springs are provided between the sealing plate and the driving plate. The driving plate is provided with a hollow rubber ring at the sealing through hole. The interior of the hollow rubber ring is connected with one end of the air cavity, and a piston is provided in seamless contact with the inner wall of the other end of the air cavity. When the hollow rubber ring expands, a sealing effect is formed between the tail cable body and the sealing through hole. The piston contacts the left side of the sealing plate. During the rightward movement of the driving plate, the piston squeezes the air inside the air cavity so that the air enters the hollow rubber ring.

[0008] Preferably, in order to prevent the sealing through hole from being open when not in use and causing external moisture and water to enter the inside of the joint, a shielding circular plate is provided on the left side of the driving plate in contact with the sealing through hole, and the shielding circular plate is hinged with a hinge seat near the center of the left side of the driving plate, and the hinge seat is fixed to the driving plate.

[0009] Preferably, in order to increase the mutual pressure between the driving plate and the sealing plate, thereby ensuring the expansion sealing effect of the hollow rubber ring, a limited pressure mechanism is provided inside the connecting rod, and the limited pressure mechanism includes an L-shaped connecting rod, a pressure spring, a straight connecting rod and a driving ring. One end of the L-shaped connecting rod is fixed on the left side of the driving plate, and the other end is slidably installed in the connecting rod and fixed to one end of the pressure spring. The other end of the pressure spring is fixed to the right end of the straight connecting rod. The left end of the straight connecting rod is movable through the screw-in nut and is fixed to the driving ring. The driving ring is contact-arranged on the left side of the screw-in nut.

[0010] Preferably, in order to avoid the connecting rod affecting the effect of the tail cable body being inserted into the sealing through-hole, four groups of connecting rods and sealing through-holes are provided, and each connecting rod is located between two sealing through-holes. In order to improve the connection stability between the driving ring and the joint, the left side of the driving ring is wrapped with a rubber resistance-enhancing layer.

[0011] Preferably, in order to achieve further elastic support and blocking effect on the L-shaped connecting rod, thereby further increasing the mutual pressure between the driving plate and the sealing plate, a blocking mechanism is provided between the L-shaped connecting rod and the straight connecting rod, and the blocking mechanism includes a pressure rod, a pressure plate and an elastic capsule. One end of the pressure rod is fixed to the left end of the L-shaped connecting rod, and the other end is fixed to one side of the pressure plate. The other side of the pressure plate is fixed to the elastic capsule, and the side of the elastic capsule away from the pressure plate is fixed inside the connecting rod.

[0012] Preferably, in order to block the movement of the driving plate when the tail cable body quickly hits the driving plate and prevent the spring between the driving plate and the sealing plate from being overstretched and damaged when the tail cable body quickly hits the driving plate, the elastic sac is configured as a hollow rubber, and the interior of the elastic sac is filled with non-Newtonian fluid, and the pressure rod is arranged inside the pressure spring.

[0013] Preferably, in order to improve the stability of other shielding circular plates when the shielding circular plate is pushed open, thereby preventing the shielding circular plate from opening and causing external moisture and water to enter the joint, an elastic support mechanism is provided at the center of the left side of the driving plate. The elastic support mechanism includes an elastic ring, a pressure block and a mounting column. The elastic ring is octagonal, and there are four pressure blocks. One end of the pressure block is fixed to the outside of the elastic ring, and the other end is located on the left side of the shielding circular plate. The mounting column is fixed at the center of the left side of the driving plate, and a slide rail is installed on the surface of the mounting column for sliding left and right. The inner side of the elastic ring is slidably connected to the slide rail, and the pressure block is slidably installed on the left side of the driving plate.

[0014] Preferably, in order to reduce the pressure of the shielding circular plates on the tail cable body when all the shielding circular plates are pushed open, thereby preventing the tail cable body from being subjected to long-term strong pressure and causing deformation and damage to the tail cable body, a trapezoidal block is installed on the left side of the mounting column for left and right sliding. The inclined surface of the trapezoidal block contacts the left side of the elastic ring, and a support spring 1 is provided between the trapezoidal block and the mounting column, and a support spring 2 is provided between the slide rail and the mounting column. The elastic force of the support spring 2 is greater than the sum of the elastic forces of the three support springs and less than the sum of the elastic forces of the four support springs.

[0015] (3) Beneficial effects

[0016] The present invention provides a waterproof tail cable with good waterproof effect. It has the following beneficial effects:

[0017] (1) The waterproof tail cable with good waterproof effect can be used to fix the tail cable body by setting a screw-in nut, a sealing plate and a sealing through hole. By setting a shielding circular plate, the sealing effect of other sealing through holes can be ensured when a small number of tail cable bodies are installed. At the same time, the driving plate, the hollow rubber ring and the piston can be set to reduce the friction between the tail cable body and the sealing through hole during installation, and achieve a contact sealing effect between the sealing through hole and the tail cable body after installation, thereby preventing external moisture and water from entering the inside of the joint through the sealing through hole.

[0018] (2) The waterproof tail cable with good waterproof effect can increase the mutual pressure between the drive plate and the sealing plate during the process of screwing in the nut and rotating the installation by arranging an L-shaped connecting rod, a pressure spring, a straight connecting rod and a driving ring, thereby increasing the contact sealing strength between the hollow rubber ring and the tail cable body, and further improving the waterproof effect.

[0019] (3) The waterproof tail cable with good waterproof effect can further improve the contact force between the driving plate and the sealing plate by setting a pressure rod, a pressure plate and an elastic sac. At the same time, the non-Newtonian fluid inside the elastic sac can block the driving plate when the driving plate is rapidly impacted by the tail cable body, preventing the spring between the driving plate and the sealing plate from being excessively stretched and damaged due to excessive force during the installation of the tail cable body.

[0020] (4) The waterproof tail cable with good waterproof effect can improve the stability of other shielding circular plates when the shielding circular plates are pushed by the tail cable body by arranging elastic rings, pressure blocks and installation columns, thereby preventing other shielding circular plates from being in an open state and causing external moisture and water to enter the inside of the joint; at the same time, the sliding rails and trapezoidal blocks can reduce the pressure of the pressure blocks on the shielding circular plates when all the shielding circular plates are pushed by the tail cable body, thereby preventing all the tail cable bodies from being squeezed, deformed and damaged by the shielding circular plates for a long time and affecting signal transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the disassembly of the tail cable body and the connector of the present invention;

[0022] Figure 2 Schematic diagram of the sealing structure of the present invention;

[0023] Figure 3 This is a multi-angle structural diagram of the position limiting and pressing mechanism of the present invention;

[0024] Figure 4 Schematic diagram of the driving plate structure in the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of the position limiting and pressure applying mechanism in the present invention;

[0026] Figure 6 Schematic diagram of the blocking mechanism structure of the present invention;

[0027] Figure 7 This is a schematic diagram of the multi-angle structure of the driving plate in the present invention;

[0028] Figure 8 For the present invention Figure 7 A schematic diagram of the enlarged structure of part A.

[0029] In the figure: 1. Tail cable body; 2. Connector; 3. Seal; 31. Screw-in nut; 32. Sealing plate; 4. Connecting rod; 5. Drive plate; 51. Hollow rubber ring; 52. Piston; 53. Shielding circular plate; 6. Position limiting pressure mechanism; 61. L-shaped connecting rod; 62. Pressure spring; 63. Straight connecting rod; 64. Drive ring; 7. Blocking mechanism; 71. Pressure rod; 72. Pressure plate; 73. Elastic capsule; 8. Elastic supporting mechanism; 81. Elastic ring; 82. Pressure block; 83. Mounting column; 831. Slide rail; 832. Trapezoidal block. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0031] See also Figure 1-8 The present invention provides a technical solution: a waterproof pigtail cable with good waterproof effect, comprising a pigtail cable body 1 and a connector 2. The left end of the connector 2 is connected to the backbone optical cable line. The pigtail cable body 1 can be connected to the right end of the connector 2. The right end of the connector 2 is provided with a seal 3. The seal 3 includes a screw-in nut 31 and a sealing plate 32. The inner side of the screw-in nut 31 is threadedly connected to the surface of the right end of the connector 2. The screw-in nut 31 and the threaded fit of the right end of the connector 2 can achieve the installation effect of the screw-in nut 31. The sealing plate 32 is fixedly connected to the right side of the screw-in nut 31 by a connecting rod 4. A plurality of sealing through holes are opened between the two sides of the sealing plate 32. The sealing through hole can be used to seal the tail cable body 1. A driving plate 5 is provided in contact with the left side of the sealing plate 32, and a plurality of return springs are provided between the sealing plate 32 and the driving plate 5. A hollow rubber ring 51 is provided on the driving plate 5 at the sealing through hole. The interior of the hollow rubber ring 51 is connected with one end of the air cavity, and a piston 52 is provided in seamless contact with the inner wall of the other end of the air cavity. When the hollow rubber ring 51 expands, a sealing effect is formed between the tail cable body 1 and the sealing through hole. The piston 52 contacts the left side of the sealing plate 32. When the driving plate 5 moves right, the piston 52 squeezes the air inside the air cavity so that the air enters the hollow rubber ring 51.

[0032] In this embodiment, in order to prevent the sealing through hole from being open when not in use, causing external moisture and water to enter the interior of the joint 2, a shielding circular plate 53 is provided on the left side of the driving plate 5 in contact with the sealing through hole, and the shielding circular plate 53 is hinged with a hinge seat near the center of the left side of the driving plate 5, and the hinge seat is fixed to the driving plate 5.

[0033] In this embodiment, in order to increase the mutual pressure between the drive plate 5 and the sealing plate 32, thereby ensuring the expansion sealing effect of the hollow rubber ring 51, a limited pressure mechanism 6 is provided inside the connecting rod 4. The limited pressure mechanism 6 includes an L-shaped connecting rod 61, a pressure spring 62, a straight connecting rod 63 and a driving ring 64. One end of the L-shaped connecting rod 61 is fixed on the left side of the driving plate 5, and the other end is slidably installed in the inside of the connecting rod 4 and fixed to one end of the pressure spring 62. The other end of the pressure spring 62 is fixed to the right end of the straight connecting rod 63. The left end of the straight connecting rod 63 is movable through the screw-in nut 31 and is fixed to the driving ring 64. The driving ring 64 is contacted and arranged on the left side of the screw-in nut 31.

[0034] In this embodiment, in order to prevent the connecting rod 4 from affecting the effect of the tail cable body 1 being inserted into the sealing through-hole, four groups of connecting rods 4 and sealing through-holes are provided, and each connecting rod 4 is located between two sealing through-holes. In order to improve the connection stability between the driving ring 64 and the connector 2, the left side of the driving ring 64 is wrapped with a rubber resistance-enhancing layer.

[0035] In this embodiment, in order to achieve further elastic support and blocking effect on the L-shaped connecting rod 61, thereby further increasing the mutual pressure between the driving plate 5 and the sealing plate 32, a blocking mechanism 7 is arranged between the L-shaped connecting rod 61 and the straight connecting rod 63. The blocking mechanism 7 includes a pressure rod 71, a pressure plate 72 and an elastic capsule 73. One end of the pressure rod 71 is fixed to the left end of the L-shaped connecting rod 61, and the other end is fixed to one side of the pressure plate 72. The other side of the pressure plate 72 is fixed to the elastic capsule 73, and the side of the elastic capsule 73 away from the pressure plate 72 is fixed inside the connecting rod 4.

[0036] In this embodiment, in order to prevent the driving plate 5 from moving when the tail cable body 1 quickly hits the driving plate 5 and prevent the spring between the driving plate 5 and the sealing plate 32 from being overstretched and damaged when the tail cable body 1 quickly hits the driving plate 5, the elastic bladder 73 is configured as a hollow rubber, and the interior of the elastic bladder 73 is filled with non-Newtonian fluid, and the pressure rod 71 is arranged inside the pressure spring 62.

[0037] In this embodiment, in order to improve the stability of other shielding circular plates 53 when the shielding circular plate 53 is pushed open, thereby preventing the shielding circular plate 53 from opening and causing external moisture and water to enter the interior of the joint 2, an elastic support mechanism 8 is provided at the center of the left side of the driving plate 5. The elastic support mechanism 8 includes an elastic ring 81, a pressure block 82 and a mounting column 83. The elastic ring 81 is octagonal, and there are four pressure blocks 82. One end of the pressure block 82 is fixed to the outside of the elastic ring 81, and the other end is located on the left side of the shielding circular plate 53. The mounting column 83 is fixed at the center of the left side of the driving plate 5, and a slide rail 831 is installed on the surface of the mounting column 83 for sliding left and right. The inner side of the elastic ring 81 is slidably connected to the slide rail 831, and the pressure block 82 is slidably installed on the left side of the driving plate 5.

[0038] In this embodiment, in order to reduce the pressure of the shielding circular plates 53 on the tail cable body 1 when all the shielding circular plates 53 are pushed open, thereby preventing the tail cable body 1 from being subjected to long-term strong pressure and causing deformation and damage to the tail cable body 1, a trapezoidal block 832 is installed on the left side of the mounting column 83 for left and right sliding. The inclined surface of the trapezoidal block 832 contacts the left side of the elastic ring 81, and a support spring 1 is provided between the trapezoidal block 832 and the mounting column 83, and a support spring 2 is provided between the slide rail 831 and the mounting column 83. The elastic force of the support spring 2 is greater than the sum of the elastic forces of the three support springs 1 and less than the sum of the elastic forces of the four support springs 1.

[0039] During the specific implementation of this embodiment, its working principle is as follows: when connecting the sealing member 3 and the tail cable body 1, the left end of the tail cable body 1 is pressed against the center of the right side of the driving plate 5 and the tail cable body 1 is moved to the left. The tail cable body 1 pushes the driving plate 5 to the left, and the return spring connecting the driving plate 5 and the sealing plate 32 is stretched. At this time, the piston 52 is separated from the sealing plate 32. The air pressure inside the hollow rubber ring 51 causes the air to flow into the air cavity and push the piston 52 to move right inside the air cavity. Then, the left end of the tail cable body 1 is pressed against the right side of the driving plate 5 and moved to a certain sealing through-hole. At this time, the driving plate 5 is reset under the elastic force of the return spring and pressed against the sealing plate 32. The sealing plate 32 contacts the piston 52 and blocks the movement of the piston 52. At this time, the driving plate 5 continues to move to the right, and the tail cable body 1 passes through the sealing through-hole and pushes the shield on the left side of the sealing through-hole. As the circular plate 53 rotates, the air inside the air cavity is compressed, so that the air inside the air cavity is injected into the hollow rubber ring 51. The hollow rubber ring 51 expands and the inner side is tightly attached to the left end of the pigtail main body 1, thereby forming a sealing effect between the pigtail main body 1 and the sealing through-hole. At this time, the left end of the pigtail main body 1 passing through the sealing through-hole is inserted into the pigtail socket on the right side of the connector 2, and the screw-in nut 31 is then rotated and installed on the right end of the connector 2 until the left side of the sealing plate 32 contacts the right side of the connector 2. The connection effect of the connector 2 and the pigtail main body 1 is achieved. The tight contact between the inner side of the hollow rubber ring 51 and the pigtail main body 1 prevents external moisture from entering the interior of the connector 2. At the same time, the blocking effect of the shielding circular plate 53 also closes the sealing through-hole where the pigtail main body 1 is not inserted, and moisture cannot enter, thereby achieving a sealing effect.

[0040] When the driving plate 5 is pushed and moved by the tail cable body 1, the driving plate 5 drives the L-shaped connecting rod 61 to move, and the L-shaped connecting rod 61 compresses the pressure spring 62. At this time, the pressure spring 62 can also play a certain elastic supporting effect. At the same time, when the nut 31 is screwed in and rotated to be installed at the right end of the joint 2, the joint 2 will contact the left side of the driving ring 64 and block the driving ring 64, so that the driving ring 64 drives the straight connecting rod 63 to move right, and the straight connecting rod 63 applies pressure to the L-shaped connecting rod 61 through the pressure spring 62, and the L-shaped connecting rod 61 applies pressure to the driving plate 5, thereby improving the stability of the driving plate 5 on the sealing plate 32, thereby ensuring that the inside of the hollow rubber ring 51 can be filled with air and fully contact and fit with the tail cable body 1; when the driving plate 5 is normally pushed by the tail cable body 1, the thrust of the tail cable body 1 on the driving plate 5 is relatively slow, and the thrust of the driving plate 5 on the L-shaped connecting rod 61 is also relatively slow, so that the L-shaped connecting rod 61 exerts pressure on the elastic bag 73 through the pressure rod 71 and the pressure plate 72 The pressure is also relatively slow, so that the non-Newtonian fluid inside the elastic capsule 73 is in a liquid state. The elastic capsule 73 can be deformed under the pressure of the pressure plate 72 without affecting the normal installation of the tail cable body 1. When the driving plate 5 is subjected to the rapid thrust of the tail cable body 1, the driving plate 5 pushes the L-shaped connecting rod 61 relatively quickly. At this time, the pressure applied by the L-shaped connecting rod 61 to the elastic capsule 73 through the pressure rod 71 and the pressure plate 72 is also relatively fast, thereby causing the non-Newtonian fluid inside the elastic capsule 73 to solidify instantly and block the movement of the L-shaped connecting rod 61 through the pressure plate 72 and the pressure rod 71. At this time, the driving plate 5 cannot move relative to the sealing plate 32, so as to slow down the pushing speed of the tail cable body 1 on the driving plate 5, thereby preventing the spring on the driving plate 5 from being overstretched and damaged when the user quickly inserts the tail cable body 1. At the same time, the blocking effect of the driving plate 5 can also provide feedback to the installer, prompting that the installation force and speed are too large, thereby reducing the damage rate during installation;

[0041] When a certain shielding circular plate 53 is pushed and rotated by the tail cable body 1, the shielding circular plate 53 rotates a certain distance first, and then the shielding circular plate 53 pushes the pressure block 82 to move, and the pressure block 82 squeezes the elastic ring 81 to deform the elastic ring 81, thereby causing the other parts of the elastic ring 81 to expand outward, so that the pressure block 82 applies pressure to other elastic rings 81, thereby increasing the length of the part of the elastic ring 81 blocking the rear side of the shielding circular plate 53, thereby increasing the thrust required to stop the shielding circular plate 53 from rotating, thereby improving the stability of the shielding circular plate 53, and preventing the shielding circular plate 53 from opening and causing external moisture to enter the interior of the joint 2. When the pressure block 82 pushes the elastic ring 81 to deform, the elastic ring 81 will pass through The inclined surface of the trapezoidal block 832 pushes the trapezoidal block 832 to move left, and due to the elastic force setting of the support spring 1 and the support spring 2, when less than four pressure blocks 82 are pushed to move by the shielding circular plate 53, the trapezoidal block 832 will move and compress the support spring 1. When the four pressure blocks 82 are pushed to move by the shielding circular plate 53 at the same time, the slide rail 831 moves to the right and drives the pressure block 82 to move. At this time, the pressure block 82 moves from one side of the hinge point between the shielding circular plate 53 and the driving plate 5 to the other side, so the pressure of the pressure block 82 on the shielding circular plate 53 disappears, thereby avoiding that all the shielding circular plates 53 always exert a large pressure on the tail cable body 1, causing the tail cable body 1 to be deformed for a long time and affecting the signal transmission effect.

[0042] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A waterproof tail cable with good waterproof effect, comprising a tail cable body (1) and a connector (2), wherein the left end of the connector (2) is connected to a backbone optical cable line, characterized in that: The right end of the joint (2) is provided with a sealing member (3), and the sealing member (3) includes a screw-in nut (31) and a sealing plate (32). The inner side of the screw-in nut (31) is threadedly connected to the right end surface of the joint (2). The sealing plate (32) is fixedly connected to the right side of the screw-in nut (31) through a connecting rod (4). A plurality of sealing through holes are provided between the two sides of the sealing plate (32). The left side of the sealing plate (32) is in contact with a driving plate (5), and a seal is formed between the sealing plate (32) and the driving plate (5). A plurality of return springs are provided, and a hollow rubber ring (51) is provided on the driving plate (5) at the sealing through hole, the interior of the hollow rubber ring (51) is communicated with one end of the air cavity, and a piston (52) is provided on the inner wall of the other end of the air cavity in seamless contact, and the piston (52) contacts the left side of the sealing plate (32); a shielding circular plate (53) is provided on the left side of the driving plate (5) in contact with the sealing through hole, and the shielding circular plate (53) is hinged to a hinge seat near the center of the left side of the driving plate (5), and the hinge seat is fixed to the driving plate (5); A limited pressure mechanism (6) is provided inside the connecting rod (4), and the limited pressure mechanism (6) includes an L-shaped connecting rod (61), a pressure spring (62), a straight connecting rod (63) and a driving ring (64). One end of the L-shaped connecting rod (61) is fixed to the left side of the driving plate (5), and the other end is slidably installed inside the connecting rod (4) and fixed to one end of the pressure spring (62). The other end of the pressure spring (62) is fixed to the right end of the straight connecting rod (63). The left end of the straight connecting rod (63) is movable through the screw-in nut (31) and fixed to the driving ring (64). The driving ring (64) is contact-arranged on the left side of the screw-in nut (31). An elastic support mechanism (8) is provided at the center of the left side of the driving plate (5), and the elastic support mechanism (8) includes an elastic ring (81), a pressure block (82) and a mounting column (83). The elastic ring (81) is octagonal, and four pressure blocks (82) are provided. One end of the pressure block (82) is fixed to the outside of the elastic ring (81), and the other end is located on the left side of the shielding circular plate (53). The mounting column (83) is fixed at the center of the left side of the driving plate (5), and a slide rail (831) is installed on the surface of the mounting column (83) for sliding left and right. The inner side of the elastic ring (81) is slidably connected to the slide rail (831), and the pressure block (82) is slidably installed on the left side of the driving plate (5).

2. The waterproof tail cable with good waterproof effect according to claim 1, characterized in that: Four groups of connecting rods (4) and sealing through holes are provided, and each connecting rod (4) is located between two sealing through holes. The left side of the driving ring (64) is wrapped with a rubber resistance-enhancing layer.

3. The waterproof tail cable with good waterproof effect according to claim 1, characterized in that: A blocking mechanism (7) is provided between the L-shaped connecting rod (61) and the straight connecting rod (63), and the blocking mechanism (7) comprises a pressure rod (71), a pressure plate (72) and an elastic capsule (73). One end of the pressure rod (71) is fixed to the left end of the L-shaped connecting rod (61), and the other end is fixed to one side of the pressure plate (72). The other side of the pressure plate (72) is fixed to the elastic capsule (73). The side of the elastic capsule (73) away from the pressure plate (72) is fixed inside the connecting rod (4).

4. The waterproof tail cable with good waterproof effect according to claim 3, characterized in that: The elastic capsule (73) is a hollow rubber configuration, and the interior of the elastic capsule (73) is filled with a non-Newtonian fluid. The pressure rod (71) is disposed inside the pressure spring (62).

5. The waterproof tail cable with good waterproof effect according to claim 1, characterized in that: A trapezoidal block (832) is installed on the left side of the mounting column (83) for sliding leftward and rightward movement. The inclined surface of the trapezoidal block (832) contacts the left side of the elastic ring (81). A support spring 1 is provided between the trapezoidal block (832) and the mounting column (83). A support spring 2 is provided between the slide rail (831) and the mounting column (83). The elastic force of the support spring 2 is greater than the sum of the elastic forces of the three support springs 1 and less than the sum of the elastic forces of the four support springs 1.

6. A method for connecting a waterproof pigtail cable with good waterproof effect, using the waterproof pigtail cable with good waterproof effect according to any one of claims 1 to 5, characterized in that: include: S1. Place the left end of the tail cable body (1) against the center of the right side of the driving plate (5) and move the tail cable body (1) to the left. The tail cable body (1) pushes the driving plate (5) to move to the left, and the piston (52) separates from the sealing plate (32). The air inside the hollow rubber ring (51) flows into the air cavity and pushes the piston (52) to move to the right inside the air cavity. S2. The left end of the tail cable body (1) is pressed against the right side of the driving plate (5) and moved to a certain sealing through hole, so that the driving plate (5) is pressed against the sealing plate (32), and the sealing plate (32) is in contact with the piston (52) and blocks the movement of the piston (52); S3, the driving plate (5) continues to move rightward, the tail cable body (1) passes through the sealing through hole and pushes the shielding circular plate (53) to rotate, so that the air inside the air cavity is compressed, and the air inside the air cavity is injected into the hollow rubber ring (51), and the hollow rubber ring (51) expands and the inner side is tightly attached to the left end of the tail cable body (1); S4. Insert the left end of the tail cable body (1) that passes through the sealing through hole into the tail cable socket on the right side of the connector (2), and then rotate the screw-in nut (31) to install it on the right end of the connector (2) until the left side of the sealing plate (32) contacts the right side of the connector (2). This will achieve the connection between the connector (2) and the tail cable body (1), and the close contact between the inner side of the hollow rubber ring (51) and the tail cable body (1) prevents external moisture from entering the interior of the connector (2).

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