A waterproof cable joint

Abstract

The application belongs to the technical field of communication equipment, and discloses a waterproof cable joint, which comprises an upper joint and a lower joint, a first water-tight cable is arranged in the upper joint, a second water-tight cable is arranged in the lower joint, the core wire of the first water-tight cable and the core wire of the second water-tight cable protrude from the shielding layer, and the shielding layers of the two are grounded; the shape of the lower end of the upper joint can be sealingly matched with the shape of the outer part of the upper end of the lower joint, so as to make the upper and lower core wires conductive and isolate the core wire from the shielding layer; a mounting groove is arranged in the lower joint, a through hole is arranged in the side of the lower joint and communicates with the mounting groove, and a water-tight mechanism is arranged in the mounting groove; when working, the upper joint and the lower joint are in contact, a closed cavity is formed between the two, the cavity is filled with water, the water pressure in the cavity increases with the approach of the two joints, the water-tight mechanism is driven to move downward in the mounting groove, the through hole is outwardly relieved to reduce the water pressure in the cavity, and the upper joint and the lower joint are continuously approached and docked.

Description

Technical Field

[0001] This invention belongs to the field of communication equipment technology, and more specifically, relates to a waterproof cable connector. Background Technology

[0002] Cable connectors are primarily used for internal connections in various optoelectronic transmission equipment, such as communication devices used to transmit data and audio. Currently, many cable connectors and plugs have high environmental requirements. General connectors cannot be used in high humidity environments, or even if they can, they lack the capability for repeated insertion and removal. Waterproof cable joints that can be repeatedly disconnected and connected in high humidity environments, even underwater, are extremely rare. Currently used cable joints, because their design did not consider waterproofing, often exhibit excessively low insulation resistance, affecting transmission and reception and leading to frequent communication failures. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a waterproof cable connector to solve the problems of frequent plugging and unplugging of existing cable connectors and frequent communication failures caused by poor waterproof performance.

[0004] To achieve the above objectives, the present invention provides a waterproof cable connector, comprising an upper connector and a lower connector. A first watertight cable is disposed within the upper connector, and a second watertight cable is disposed within the lower connector. The core wires of both the first and second watertight cables protrude from their shielding layers, and both shielding layers are grounded. The internal shape of the lower end of the upper connector can seal and fit with the external shape of the upper end of the lower connector, thereby enabling the upper and lower core wires to conduct and isolating the core wires from the shielding layers. An installation groove is provided within the lower connector, and a through hole communicating with the installation groove is provided on its side. A watertight mechanism is disposed within the installation groove.

[0005] During operation, the upper connector and the lower connector come into contact, forming a sealed cavity filled with water. As the two connectors approach each other, the water pressure inside the cavity increases, pushing the watertight mechanism downward within the mounting groove. The through hole releases pressure outward to reduce the water pressure inside the cavity, thereby causing the upper connector and the lower connector to continuously approach and connect.

[0006] Furthermore, the watertight mechanism includes a slider and an elastic element. One end of the elastic element contacts the bottom surface of the mounting groove, and the other end abuts against the bottom surface of the slider. The slider is sealed and fitted against the side wall of the mounting groove, thus limiting the elastic element in the mounting groove.

[0007] Furthermore, the lower connector joint end is provided with a stepped structure, the mounting groove is formed on the end face of the stepped structure, and the end face of the stepped structure is also provided with a stop member, which is used to limit the watertight mechanism within the mounting groove.

[0008] Furthermore, the upper connector includes an upper connector insulating cylinder, a first pressure cap, and an upper metal sleeve; the upper end face of the upper connector insulating cylinder contacts and fits with the lower end face of the first pressure cap, and the upper metal sleeve is sleeved on the outside of the assembled upper connector insulating cylinder and the first pressure cap, and the second watertight cable passes through the side of the upper metal sleeve into the upper connector insulating cylinder; preferably, a first sealing element is also provided on the inner wall of the upper connector insulating cylinder to form a sealed cavity when the lower connector contacts the upper connector.

[0009] Furthermore, the upper connector insulating cylinder and the upper metal sleeve are assembled as one unit; preferably, the upper connector insulating cylinder and the upper metal sleeve are fixed by a threaded connection.

[0010] Furthermore, an upper connector core rod is provided inside the upper connector insulating cylinder, the core wire of the first watertight cable passes through the upper connector core rod, and the shielding layer of the first watertight cable is confined outside the connector core rod; after the upper connector and the lower connector are assembled, the core wire of the second watertight cable is inserted into the upper connector core rod, and the shielding layer of the second watertight cable is also confined outside the connector core rod; preferably, a third sealing element is provided between the contact surface of the shielding layer of the first watertight cable and the upper connector insulating cylinder.

[0011] Furthermore, an insulating cap is provided between the connector core rod and the first pressure cap; preferably, a second sealing element is provided between the insulating cap and the contact surface of the upper connector insulating cylinder.

[0012] Furthermore, an installation cylinder is provided on the side of the upper metal sleeve, and a through hole is opened on the bottom surface of the installation cylinder. The first watertight cable passes through the through hole and is installed in the upper connector core rod. Preferably, a first pressure ring and a rubber stuffing box are provided between the first watertight cable and the inner wall of the installation cylinder. A second pressure cap is provided on the end face of the installation cylinder. The second pressure cap is assembled with the installation cylinder to press the first pressure ring and the rubber stuffing box into the installation cylinder to achieve watertightness.

[0013] Furthermore, the lower connector is also provided with a lower connector core rod, the core wire of the second watertight cable passes through the lower connector core rod, its shielding layer is isolated outside the lower connector core rod, and the lower connector core rod can contact and conduct with the first watertight cable.

[0014] Furthermore, the lower connector includes a lower connector insulating frame, a lower metal sleeve, and a third pressure cap. The lower connector insulating frame is installed inside the upper end of the lower metal sleeve. The mounting groove is formed in the lower connector insulating frame. The lower connector core rod is vertically arranged in the center of the lower connector insulating frame, and the second watertight cable passes through it. A second pressure ring is provided in the lower metal sleeve. The second pressure ring is sleeved on the outside of the second watertight cable to compress the shielding layer of the second watertight cable, and its upper end face abuts against the bottom surface of the lower connector insulating frame. The third pressure cap is sleeved on the outside of the second watertight cable and is threadedly connected to the lower end of the lower metal sleeve to restrict the second pressure ring inside the lower metal sleeve. The through hole is formed on the side wall where the lower connector insulating frame and the lower metal sleeve overlap. Preferably, a boss is also provided inside the lower metal sleeve, and the bottom surface of the lower connector insulating frame abuts against the boss.

[0015] Compared with the prior art, the above technical solutions conceived by this invention have the following main advantages:

[0016] The cable connector of the present invention consists of two main parts: an upper connector and a lower connector. The internal shape of the upper connector can be sealed and matched with the external shape of the lower connector, so that the core wires of the first watertight cable and the second watertight cable can be connected. Since the core wires protrude from the shielding layer, the core wires can be isolated from the shielding layer after being connected, ensuring that the cable connector can achieve normal communication function after the cable is connected, even in high humidity or under partial water pressure.

[0017] The lower connector of this invention also has an installation groove, and its side has a through hole communicating with the installation groove. The watertight mechanism is set in the installation groove. When communication is required, the upper connector and the lower connector come into contact, forming a sealed cavity filled with water. As the two connectors approach each other, the water pressure inside the cavity increases, pushing the watertight mechanism downward in the installation groove. At the same time, water or gas in the installation groove is discharged from the through hole, thereby reducing the water pressure inside the cavity, allowing the upper connector and the lower connector to approach further and connect. After communication ends, the elevator can be driven to move in the opposite direction to disconnect the cable connection, thus easily realizing the repeated disconnection and connection of the cable connector without affecting its communication function. The watertight mechanism includes a slider and an elastic element installed in the installation groove. The slider can compress the elastic element to release pressure, and the elastic element can push the slider to return to its original position. Through simple cooperation, the cable connector can smoothly contact or disconnect in a watery environment.

[0018] The present invention includes an upper connector core rod inside the upper connector insulating cylinder. After the core wires of the first watertight cable and the second watertight cable are connected, since the core wires are respectively located in the upper connector core rod and the lower connector core rod, they can be isolated from their respective shielding layers, thus enabling the core rods and shielding layers to conduct electricity separately. Furthermore, an insulating cap is provided between the connector core rod and the first pressure cap, and a second sealing element is provided between the insulating cap and the contact surface of the upper connector insulating cylinder. A first sealing element is provided on the inner wall of the upper connector insulating cylinder, and a third sealing element is provided between the shielding layer of the first watertight cable and the contact surface of the upper connector insulating cylinder. A first pressure ring and a rubber stuffing box are provided between the first watertight cable and the inner wall of the mounting cylinder. These sealing elements form a tight sealing structure, providing an insulated and sealed working space for the connected core wires, ensuring the watertightness between the core wires and the shielding layer. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the upper connector structure according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the lower connector structure according to an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the assembly of the upper and lower connectors according to an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the upper connector insulating cylinder according to an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the first pressure cap according to an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the upper metal sleeve according to an embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram of the upper connector core rod according to an embodiment of the present invention;

[0026] Figure 8 This is a schematic diagram of the insulating cap according to an embodiment of the present invention;

[0027] Figure 9 This is a schematic diagram of the lower connector core rod according to an embodiment of the present invention;

[0028] Figure 10 This is a schematic diagram of the lower connector insulation frame according to an embodiment of the present invention;

[0029] Figure 11 This is a schematic diagram of the lower metal sleeve according to an embodiment of the present invention;

[0030] Figure 12 This is a schematic diagram of the third pressure cap according to an embodiment of the present invention;

[0031] Figure 13This is a schematic diagram of the watertight cable structure according to an embodiment of the present invention.

[0032] Reference numerals: 1-First pressure cap, 2-Upper metal sleeve, 3-First watertight cable, 4-Second pressure cap, 5-First pressure ring, 6-Rubber stuffing box, 7-Sealing gasket, 8-Upper connector insulating cylinder, 9-First sealing element, 10-Upper connector core rod, 11-Insulating cap, 12-Second sealing element, 13-Lower connector core rod, 14-Sealing ring, 15-Stop element, 16-Sealing gasket, 17-Slider, 18-Elastic element, 19-Lower metal sleeve, 20-Annular rubber stuffing box, 21-Second watertight cable, 22-Third pressure cap, 23-Second pressure ring, 24-O-ring seal, 25-Through hole, 26-Lower connector insulating skeleton. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0034] Example 1

[0035] This embodiment provides a waterproof cable connector including, as follows: Figure 1 The upper connector shown and as Figure 2 The lower connector shown has a first watertight cable 3 inside the upper connector and a second watertight cable 21 inside the lower connector. A section of the core wire of both the first watertight cable 3 and the second watertight cable 21 protrudes from their shielding layers. The shape inside the upper connector's joint end seals with the shape outside the lower connector's joint end, allowing the core wires of the first watertight cable 3 and the second watertight cable 21 to conduct. An annular mounting groove is provided inside the lower connector, coaxially arranged with the upper and lower connectors and surrounding the second watertight cable 21. A through hole 25 communicating with the mounting groove is provided on the side of the lower connector. A watertight mechanism is provided inside the mounting groove. The watertight mechanism includes a coaxially arranged annular slider 17 and an elastic element 18. The elastic element 18 is a spring, with one end contacting the bottom surface of the mounting groove and the other end abutting against the bottom surface of the slider 17. The slider 17 is sealed against the side wall of the mounting groove, limiting the elastic element 18 within the mounting groove. The structures of the two aforementioned watertight cables are as follows: Figure 13 As shown, A is the core wire of the watertight cable, B is the insulation layer between the core wire and the shielding layer of the watertight cable, C is the outer watertight layer of the watertight cable, and D is the shielding layer of the watertight cable.

[0036] In a preferred embodiment, the aforementioned mounting groove can also be a cylindrical groove symmetrically arranged next to the second watertight cable 21 and vertically opened, and the slider 17 is a frustum-shaped slider, with the outer wall of the frustum in contact with the inner wall of the cylindrical groove, which can compress the spring arranged below the slider 17.

[0037] In a preferred embodiment, when the cable joints need to be joined in water, an external elevator drives the lower joint to approach the upper joint. After the inner wall of the upper joint contacts the outer wall of the lower joint, a sealed cavity is formed between them. The cavity is filled with water. As the two joints approach each other, the water pressure inside the cavity increases, pushing the slider 17 downward to compress the elastic element 18 and move it downward in the mounting groove. The water or air in the mounting groove is discharged through the through hole 25, thereby reducing the water pressure inside the cavity and enabling the upper and lower joints to be connected. After the two are connected, the core wires of the first watertight cable 3 and the second watertight cable 21 are connected and insulated from their respective shielding layers.

[0038] In a preferred embodiment, the lower connector joint end has a stepped structure, and the mounting groove is opened on the stepped end face. The stepped end face is also provided with a stop 15, which is used to limit the watertight mechanism in the mounting groove to ensure that the cable connector can still work normally after repeated assembly or disassembly.

[0039] In a preferred embodiment, the upper connector includes an upper connector insulating cylinder 8, a first pressure cap 1, and an upper metal sleeve 2. The upper end face of the upper connector insulating cylinder 8 abuts against the lower end face of the first pressure cap 1. The upper metal sleeve 2 is sleeved on the outside of the assembled upper connector insulating cylinder 8 and the first pressure cap 1, and the inner wall of the upper metal sleeve 2 is tightly fitted with the outer wall of the upper connector insulating cylinder 8 and the first pressure cap 1. The second watertight cable 21 passes through the side of the upper metal sleeve 2 into the upper connector insulating cylinder 8, which can realize that the core rod and the cable shielding layers of the upper and lower connectors are in an insulating state.

[0040] In a preferred embodiment, an upper connector core rod 10 is provided inside the upper connector insulating cylinder 8. The upper connector core rod 10 is a vertically arranged column with a horizontal insertion hole in its center. The core wire of the first watertight cable 3 passes horizontally from the side of the upper connector into the horizontal insertion hole in the upper connector core rod 10, and the shielding layer of the first watertight cable 3 is just confined outside the horizontal insertion hole of the connector core rod 10. A vertical insertion hole is also provided at the lower end of the upper connector core rod 10. When the upper connector and the lower connector are assembled, the core wire of the second watertight cable 21 is vertically inserted into the vertical insertion hole in the upper connector core rod 10, and the shielding layer of the second watertight cable 21 is also confined outside the connector core rod 10.

[0041] In a preferred embodiment, an insulating cap 11 is provided between the connector core rod 10 and the first pressure cap 1 to ensure that the connector core rod is insulated from the first pressure cap 1; a second sealing element 12 is provided between the contact surface of the insulating cap 11 and the upper connector insulating cylinder 8 to ensure that water in the sealed cavity will not seep into the insulating cap 11 from the gap between the connector core rod 10 and the upper connector insulating cylinder 8 and continue to overflow.

[0042] In a preferred embodiment, a first sealing element 9 is also provided on the lower inner wall of the upper connector insulating cylinder 8, which is used to form a sealed cavity when the lower connector and the upper connector are in contact. The first sealing element 9 is selected as an insulating rubber pad or rubber ring, etc., and its position can be set on the upper side of the upper connector insulating cylinder 8.

[0043] In a preferred embodiment, both the upper connector insulating cylinder 8 and the upper metal sleeve 2 are provided with mating threads, which connect them together for easy disassembly and replacement.

[0044] In a preferred embodiment, an installation cylinder is provided on the side of the upper metal sleeve 2. The installation cylinder is perpendicular to the side wall of the upper metal sleeve and has a through hole on its bottom surface. The first watertight cable 3 passes through the through hole and enters the upper connector core rod 10. A first pressure ring 5 and a rubber stuffing box 6 are also provided between the first watertight cable 3 and the inner wall of the installation cylinder to ensure the watertightness between the core wire and the shielding layer. A second pressure cap 4 is also provided on the end face of the installation cylinder. The second pressure cap 4 is assembled with the installation cylinder to press the first pressure ring 5 and the rubber stuffing box 6 into the installation cylinder to achieve the watertightness of the first watertight cable 3 in the installation cylinder.

[0045] In a preferred embodiment, the lower connector is further provided with a lower connector core rod 13, the core wire of the second watertight cable 21 is passed through the lower connector core rod 13, its shielding layer is isolated outside the lower connector core rod 13, and the lower connector core rod 13 can contact and conduct with the first watertight cable 3.

[0046] In a preferred embodiment, the aforementioned lower connector includes a lower connector insulating frame 26, a lower metal sleeve 19, and a third pressure cap 22. A mounting groove is formed in the lower connector insulating frame 26. The lower connector insulating frame 26 is installed inside the upper end of the lower metal sleeve 19, and a boss is also provided inside the lower metal sleeve 19. The bottom surface of the lower connector insulating frame 26 abuts against the boss, and a second watertight cable 21 passes through the center of the lower connector insulating frame 26. A second pressure ring 23 is provided in the lower metal sleeve 19. The second pressure ring 23 is fitted outside the second watertight cable 21 to compress the shielding layer of the second watertight cable 21, and its upper end face abuts against the bottom surface of the lower connector insulating frame 26. The third pressure cap 22 is fitted outside the second watertight cable 21 and cooperates with the lower end of the lower metal sleeve 19 to restrict the second pressure ring 23 within the lower metal sleeve 19. A through hole 25 is formed on the overlapping sidewall of the lower connector insulating frame 26 and the lower metal sleeve 19.

[0047] Example 2

[0048] Combination Figure 3As shown, this embodiment provides a waterproof cable connector including an upper connector and a lower connector. The upper and lower connectors are equipped with multi-stage sealing structures to achieve a watertight seal after assembly. The upper connector has a stepped cavity inside, and the lower connector has a stepped shape that is smaller at the top and larger at the bottom. The upper connector can be inserted into the cavity of the lower connector, and the sidewalls of the two connectors can fit tightly together to achieve a sealed assembly, and ensure that the watertight seal between them is achieved. Figure 13 The core wires of the two watertight cable sections shown are connected. At least one mounting groove is provided on the lower connector in a direction perpendicular to the stepped end face. A through hole 25 communicating with the mounting groove is provided on the side of the lower connector. A watertight mechanism is provided in each mounting groove. The watertight mechanism includes a frustum-shaped slider 17 and an elastic element 18 that fit tightly against the side wall of the mounting groove. In this embodiment, the elastic element is a spring, with one end of the spring contacting the bottom surface of the mounting groove and the other end abutting against the bottom surface of the slider 17. A sealing washer 16 is provided on the slider 17, allowing the slider 17 to seal tightly against the side wall of the mounting groove, thus limiting the elastic element 18 within the mounting groove. An O-ring stop 15 is also provided at the mounting groove opening. The stop 15 is made of rubber and is used to limit the watertight mechanism within the mounting groove, ensuring that the cable connector can still function normally after repeated assembly or disassembly.

[0049] The aforementioned upper connector includes an upper connector insulating cylinder 8, a first pressure cap 1, and an upper metal sleeve 2; the upper connector insulating cylinder 8 is as follows: Figure 4 The device shown is hollow, and its upper end face is arc-shaped to match the lower end face of the first pressure cap 1. The shape of the first pressure cap 1 is as follows: Figure 5 As shown; the shape of the upper metal sleeve 2 is as follows Figure 6 As shown, it is sleeved on the outside of the assembled upper connector insulating cylinder 8 and the first pressure cap 1. The contact surface gap between the upper connector insulating cylinder 8 and the first pressure cap 1 is located in the middle of the upper metal sleeve 2, and the inner wall of the upper metal sleeve 2 is tightly fitted with the outer wall of the upper connector insulating cylinder 8 and the first pressure cap 1. The second watertight cable 21 is vertically inserted into the upper connector insulating cylinder 8 from the side of the upper metal sleeve 2.

[0050] The upper connector insulating cylinder 8 is also equipped with such as Figure 7The upper connector core rod 10 shown is a vertically arranged column with a spherical upper end and a cylindrical lower end. A horizontal insertion hole is provided in the center of the spherical part, and a vertical insertion hole is provided in the cylindrical part. The core wire of the first watertight cable 3 passes horizontally from the side of the upper connector into the horizontal insertion hole in the upper connector core rod 10, and the shielding layer of the first watertight cable 3 is just confined outside the horizontal insertion hole of the connector core rod 10. A second pressure cap 4 is also provided on the end face of the mounting cylinder. The second pressure cap 4 is connected to the mounting cylinder by threads to press the first pressure ring 5 and the rubber stuffing box 6 into the mounting cylinder to achieve watertightness of the first watertight cable 3 in the mounting cylinder. When the upper connector and the lower connector are assembled, the core wire of the second watertight cable 21 is vertically inserted into the vertical insertion hole in the upper connector core rod 10, and the shielding layer of the second watertight cable 21 is also confined outside the connector core rod 10.

[0051] The lower inner wall of the upper connector insulating cylinder 8 is also provided with a first sealing element 9, which is an O-ring. When the lower connector is inserted into the upper connector and its outer wall contacts the O-ring, a closed cavity with a smaller upper part and a larger lower part is formed between the upper connector and the lower connector. The upper connector insulating cylinder 8 and the upper metal sleeve 2 are fixed by a threaded connection, which facilitates disassembly and replacement.

[0052] The aforementioned upper metal sleeve 2 has an installation cylinder on its side, which is perpendicular to the side wall of the upper metal sleeve. The bottom surface of the installation cylinder has a through hole, which is coaxial with and connected to the transverse insertion hole at the center of the sphere. The first watertight cable 3 passes through the through hole and is vertically inserted into the upper connector core rod 10. A first pressure ring 5 and a rubber stuffing box 6 are also provided between the first watertight cable 3 and the inner wall of the installation cylinder to ensure the watertightness between the core wire and the shielding layer. A sealing gasket 7 is provided between the contact surface of the first watertight cable 3 and the upper connector insulating cylinder 8 to achieve a seal between the two.

[0053] A joint such as the upper connector core rod 10 and the first pressure cap 1 is also provided between them. Figure 8 The insulating cap 11 shown has its upper end tightly fitted to the lower end face of the first pressure cap 1, and its lower end face tightly fitted to the upper spherical surface of the upper connector core rod 10, ensuring that the upper connector core rod 10 is insulated from the first pressure cap 1. A second sealing element 12 is provided between the contact surfaces of the insulating cap 11 and the upper connector insulating cylinder 8. The second sealing element 12 is a rubber sealing gasket embedded in the outside of the insulating cap, which is used to ensure that water in the sealed cavity will not seep into the insulating cap 11 from the gap between the connector core rod 10 and the upper connector insulating cylinder 8 and overflow. It is a sealing structure in the entire cable joint.

[0054] The lower connector includes hollow and coaxially arranged connectors, such as... Figure 10 The lower connector insulating frame 26 shown is as follows: Figure 11 The lower metal sleeve 19 shown and as Figure 12The third pressure cap 22 shown has a mounting groove formed in the lower connector insulating frame 26. The lower connector insulating frame 26 is installed inside the upper end of the lower metal sleeve 19, and a boss is also provided inside the lower metal sleeve 19. The bottom surface of the lower connector insulating frame 26 abuts against the boss. A second watertight cable 21 passes through the center of the lower connector insulating frame 26, and an O-ring seal 24 is provided between the contact surface of the lower connector insulating frame 26 and the second watertight cable 21 for sealing. The lower connector insulating frame 26 also has... Figure 9 The lower connector core rod 13 shown is in which the core wire of the second watertight cable 21 passes, and its shielding layer is isolated outside the lower connector core rod 13. The lower connector core rod 13 can make contact and conduct electricity with the first watertight cable 3. Two sealing rings 14 are also provided between the contact surface of the lower connector core rod 13 and the lower connector insulation skeleton 26 for sealing. A second pressure ring 23 is provided in the lower metal sleeve 19. The second pressure ring 23 is sleeved on the outside of the second watertight cable 21 to compress the shielding layer of the second watertight cable 21, and its upper end face is in contact with the lower connector insulation skeleton 26. The bottom surface of the insulating skeleton 26 abuts against the third pressure cap 22, and a second rubber stuffing box 20 is provided between its lower end face and the third pressure cap 22 for sealing; the third pressure cap 22 is sleeved on the second watertight cable 21 and is threadedly connected to the lower end of the lower metal sleeve 19. The external thread of the third pressure cap 22 is provided on its outer side wall, and the internal thread of the lower metal sleeve 19 is provided on its outer side wall. The external thread and the internal thread cooperate to restrict the second pressure ring 23 inside the lower metal sleeve 19; the through hole 25 is opened on the side wall where the lower connector insulating skeleton 26 and the lower metal sleeve 19 overlap.

[0055] The working principle of the cable connector in this embodiment is as follows: When the cable connector needs to be joined in water, the external elevator drives the lower connector to approach the upper connector. After the inner wall of the upper connector contacts the outer wall of the lower connector, a sealed cavity is formed between them. The cavity is filled with water. As the two connectors approach each other, the water pressure inside the cavity increases, and pushes the slider 17 downward to compress the elastic element 18 and move it downward in the mounting groove. The water or air in the mounting groove is discharged through the through hole 25, thereby reducing the water pressure inside the cavity and enabling the upper connector and the lower connector to be connected. After the two are connected, the core wires of the first watertight cable 3 and the second watertight cable 21 are connected and insulated from their respective shielding layers.

[0056] Compared to conventional communication equipment cable connectors that are difficult to disconnect once connected, the cable connector of this invention, through the design of multiple sealing structures, isolates the cable core from the outer conductor, enabling repeated connection and disconnection even in high humidity environments or underwater. That is, the upper and lower connectors are connected when communication is needed and disconnected when not needed, and repeated connection and disconnection will not affect the communication quality of the cable, resulting in high durability.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A waterproof cable connector, characterized in that, The cable connector includes an upper connector and a lower connector. The upper connector contains a first watertight cable (3), and the lower connector contains a second watertight cable (21). The core wires of both the first watertight cable (3) and the second watertight cable (21) protrude from their shielding layers, and both shielding layers are grounded. The internal shape of the lower end of the upper connector can seal and fit with the external shape of the upper end of the lower connector to allow the upper and lower core wires to conduct and to isolate the core wires from the shielding layer. The lower connector has an installation groove, and a watertight mechanism is provided in the installation groove. A through hole (25) communicating with the installation groove is provided on the side of the installation groove. During operation, the lower connector contacts the upper connector, forming a sealed cavity between them. The cavity is filled with water. As the two connectors approach each other, the water pressure inside the cavity increases, pushing the watertight mechanism to move downward in the mounting groove. The through hole (25) releases pressure to reduce the water pressure inside the cavity, thereby causing the upper connector and the lower connector to continuously approach and connect. The watertight mechanism includes a slider (17) and an elastic element (18). One end of the elastic element (18) contacts the bottom surface of the mounting groove, and the other end abuts against the bottom surface of the slider (17). The slider (17) is sealed and fitted against the side wall of the mounting groove, thus limiting the elastic element (18) in the mounting groove. The upper connector includes an upper connector insulating cylinder (8), a first pressure cap (1), and an upper metal sleeve (2); the upper end face of the upper connector insulating cylinder (8) is in contact with the lower end face of the first pressure cap (1), the upper metal sleeve (2) is sleeved on the outside of the assembled upper connector insulating cylinder (8) and the first pressure cap (1), and the second watertight cable (21) passes through the side of the upper metal sleeve (2) into the upper connector insulating cylinder (8).

2. A waterproof cable connector as described in claim 1, characterized in that, The upper end of the lower connector is a stepped structure, and the mounting groove is opened on the end face of the step. A stop (15) is also provided on the end face of the step. The stop (15) is used to limit the watertight mechanism in the mounting groove.

3. A waterproof cable connector as described in claim 1 or 2, characterized in that, The inner wall of the upper connector insulating cylinder (8) is also provided with a first sealing element (9) to form a sealed cavity when the lower connector comes into contact with the upper connector.

4. A waterproof cable connector as described in claim 1, characterized in that, The upper connector insulating cylinder (8) is assembled and connected with the upper metal sleeve (2).

5. A waterproof cable connector as described in claim 4, characterized in that, The upper connector insulating cylinder (8) and the upper metal sleeve (2) are fixed by a threaded connection.

6. A waterproof cable connector as described in claim 1, characterized in that, The upper connector insulating cylinder (8) is provided with an upper connector core rod (10); the core wire of the first watertight cable (3) is inserted into the upper connector core rod (10), and the shielding layer of the first watertight cable (3) is restricted outside the connector core rod (10); after the upper connector and the lower connector are assembled, the core wire of the second watertight cable (21) is inserted into the upper connector core rod (10), and the shielding layer of the second watertight cable (21) is also restricted outside the connector core rod (10).

7. A waterproof cable connector as described in claim 6, characterized in that, A third sealing element (7) is provided between the shielding layer of the first watertight cable (3) and the contact surface of the upper connector insulating cylinder (8).

8. A waterproof cable connector as described in claim 6, characterized in that, An insulating cap (11) is provided between the connector core rod (10) and the first pressure cap (1).

9. A waterproof cable connector as described in claim 8, characterized in that, A second sealing element (12) is provided between the contact surface of the insulating cap (11) and the upper connector insulating cylinder (8).

10. A waterproof cable connector as described in claim 6, characterized in that, The upper metal sleeve (2) has an installation cylinder on its side, and the bottom surface of the installation cylinder has a through hole. The first watertight cable (3) passes through the through hole and is installed in the upper connector core rod (10).

11. A waterproof cable connector as described in claim 10, characterized in that, A first pressure ring (5) and a rubber stuffing box (6) are provided between the first watertight cable (3) and the inner wall of the mounting cylinder. A second pressure cap (4) is provided on the end face of the mounting cylinder. The second pressure cap (4) is assembled with the mounting cylinder to press the first pressure ring (5) and the rubber stuffing box (6) into the mounting cylinder to achieve watertightness.

12. A waterproof cable connector as described in claim 1, characterized in that, The lower connector is also provided with a lower connector core rod (13), the core wire of the second watertight cable (21) is passed through the lower connector core rod (13), its shielding layer is isolated outside the lower connector core rod (13), and the lower connector core rod (13) can contact and conduct with the first watertight cable (3).

13. A waterproof cable connector as described in claim 12, characterized in that, The lower connector includes a lower connector insulating frame (26), a lower metal sleeve (19), and a third pressure cap (22), wherein: The lower connector insulating frame (26) is installed inside the upper end of the lower metal sleeve (19), the mounting groove is opened in the lower connector insulating frame (26), the lower connector core rod (13) is vertically arranged in the center of the lower connector insulating frame (26), and the second watertight cable (21) is passed through its center. The lower metal sleeve (19) is provided with a second pressure ring (23), which is sleeved on the outside of the second watertight cable (21) to press the shielding layer of the second watertight cable (21) tightly, and its upper end face abuts against the bottom surface of the lower connector insulation skeleton (26). The third pressure cap (22) is sleeved on the outside of the second watertight cable (21) and is assembled with the lower end of the lower metal sleeve (19) to restrict the second pressure ring (23) inside the lower metal sleeve (19); the through hole (25) is opened on the side wall where the lower connector insulating skeleton (26) and the lower metal sleeve (19) overlap.

14. A waterproof cable connector as described in claim 13, characterized in that, The lower metal sleeve (19) is also provided with a boss inside, and the bottom surface of the lower connector insulating skeleton (26) abuts against the boss.

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