An electrical connection device

Abstract

The present invention relates to an electrical connection device, specifically to an underwater connector with excellent sealing performance and good pressure balance, which includes a first connection component and a second connection component that can be inserted into each other. The first connection component and the second connection component respectively have at least one set of insertion rods for realizing electrical connection and channels that match their outer shapes. An insulating sealing rod is movably assembled in the channel in the front-rear direction. A chamber communicating with the outside is provided behind the channel. The rear end of the insulating sealing rod is located in the chamber. A sealing plug is provided at the rear end of the insulating sealing rod to block and seal the water passage chamber, and an outer seal is formed at the front end of the channel, establishing a multiple sealing structure, enabling reliable seals to be formed both in front of and behind the contacts of the first connection component and the second connection component. A water passage chamber is provided behind the channel formed by the combination of a groove cover and a groove, greatly improving the reliability of the connector when used in special environments such as underwater and the flexibility of the design and installation of the electrical connection device.

Description

Technical Field

[0001] The present invention relates to an electrical connection device, and more particularly to an underwater connector with excellent sealing performance and good pressure balance. Background Art

[0002] Underwater connectors are usually applied in special environments such as deep water. An underwater connector with underwater plugging and unplugging functions must ensure that the male and female plug contacts of the connector are sealed from the external medium during the plugging and unplugging processes to avoid short circuits. A conventional sealing solution is to install a sealing rod inside the female pin, and the male pin pushes the sealing rod to move, so as to gradually insert into the female pin without gaps until it contacts the female pin contact; in order to ensure the pressure balance inside and outside the female pin, one solution is to form a water passage cavity communicating with the outside behind the female pin. For example, a Chinese patent with the patent number 201310369867.X discloses a contact body cable assembly for underwater plugging and unplugging, including an insulating housing, in which a plugging channel is formed, an electrical contact body (female pin) is embedded in the plugging channel, a jack sealing rod is assembled in the plugging channel, and a water passage cavity is behind the plugging channel. A return spring is assembled in the water passage cavity. The sealing of the plugging channel (further speaking, that is, the sealing of the electrical contact body contact) is only achieved by the front and rear sealing ring structures in the plugging channel, and the front and rear ends of the plugging channel still remain in communication with the external medium (such as water). When this structure is applied in a deep water environment, due to the large water pressure, its simple sealing structure cannot meet the sealing requirements, and it is easy to cause medium leakage and short circuit. Therefore, the current underwater connectors generally have the problem of unreliable sealing. Summary of the Invention

[0003] Therefore, in view of the above problems, the present invention provides an underwater connector with excellent sealing performance and good pressure balance.

[0004] The present invention is implemented by the following technical solutions:

[0005] The present invention provides an electrical connection device, including a first connection component and a second connection component that can be plugged into each other. The first connection component and the second connection component respectively have at least one set of insertion rods for realizing electrical connection and channels matching their shapes. Taking the plugging ends of the first connection component and the second connection component as their respective front ends, an insulating sealing rod is movably assembled in the channel in the front-rear direction. A chamber communicating with the outside is provided behind the channel, and the rear end of the insulating sealing rod is located in the chamber. When the insertion rod is inserted into the channel and pushes the insulating sealing rod to slide backward along the channel, the insertion rod and the channel achieve electrical connection.

[0006] The chamber is a substantially enclosed space, only having a medium channel for communicating with the outside world. The rear end of the insulating sealing rod has a sealing plug. When the first connection component and the second connection component are inserted into each other, the sealing plug can block the medium channel as the insulating sealing rod moves backward, thereby completely enclosing the chamber.

[0007] Wherein, in order to improve the sealing effect in front of the pore channel, in one embodiment, the rear of the plug rod has a sealing surface, and a sealing ring is arranged around the plug rod on the sealing surface. When the first connection component and the second connection component are inserted into each other, the opening surface at the front end of the pore channel is sealed by the sealing surface and the sealing ring.

[0008] Wherein, considering manufacturing and installation, in one embodiment, the second connection component includes a second housing and a second installation body made of insulating material embedded in the second housing. The pore channel is arranged at the front end of the second installation body. The first connection component includes a first housing and a first installation body made of insulating material embedded in the first housing. The rear end of the plug rod is embedded in the first installation body. A sealing ring surrounding the plug rod is arranged on the front end surface of the first installation body. When the first connection component and the second connection component are inserted into each other, the opening surface at the front end of the pore channel is sealed by the contact action between the front end surface of the first installation body and the sealing ring and the front end of the second installation body.

[0009] Wherein, in order to facilitate the installation of the insulating sealing rod and to improve the flexibility of design and manufacturing, in one embodiment, the second connection component includes a second housing and a second installation body made of insulating material embedded in the second housing. The pore channel is arranged at the front end of the second installation body. The second installation body is provided with a groove in the front-back direction at the rear end of the pore channel. A groove cover is further included. The groove cover tightly covers the groove to substantially seal the groove. The groove cover has an overflow hole serving as the medium channel. The groove cover and the groove form the chamber.

[0010] Wherein, in order to improve the sealing effect, a sealing ring surrounding the protrusion is arranged on the side of the groove cover in contact with the groove.

[0011] Wherein, in order to realize the reset of the insulating sealing rod and to make the medium remaining in the chamber less, in one embodiment, a reset spring for resetting the insulating sealing rod is further included. The reset spring is installed in the chamber. The groove cover has a first spring seat for installing the reset spring on its inner side located in the chamber. The rear end of the insulating sealing rod has a second spring seat for installing the reset spring. The shape of the front end of the first spring seat is substantially matched with the shape of the rear end of the second spring seat.

[0012] Among them, in order to improve the stability of the installation of the return spring, in one embodiment, the slot cover has a step extending in the front-to-back direction on its inner side, and the overflow hole is opened obliquely from the front step surface of the step to the outer side of the slot cover. The slot cover also has a first extension portion extending in the front-to-back direction on its inner side, and the first extension portion and the step together form a space for accommodating the return spring, and a first spring sleeve column for installing the return spring is provided between the first extension portion and the step.

[0013] In order to improve the stability of the installation of the return spring, in one embodiment, the second spring seat includes a base that forms a resistance with the return spring, and a second spring sleeve column extending backward from the base for installing the return spring, and the sealing plug is arranged on the base.

[0014] Among them, in order to improve the sealing performance, in one embodiment, the step and the first extension portion are located on the rearward movement path of the sealing plug and the base, and can respectively form a stop for the backward movement of the sealing plug and the base. The sealing plug is made of elastic material, and the length of the sealing plug in the front-to-back direction is greater than the distance between the front end faces of the step and the first extension portion in the front-to-back direction.

[0015] In order to discharge as much medium as possible from the chamber, in one embodiment, the medium channel is arranged at a rear position in the chamber.

[0016] Among them, in order to ensure good electrical contact between the first connecting component and the second connecting component, in one embodiment, a spring sheet that extends roughly forward and backward in a sheet shape and is tilted at the rear end is fixedly connected to the outer surface of the second mounting body, and a clamping piece is provided on the first connecting component. When the first connecting component and the second connecting component are plugged together, the clamping piece can cooperate with the spring sheet and push the tilted end of the spring sheet roughly in the radial inward direction of the channel.

[0017] Among them, in order to improve the sealing performance, in one embodiment, the channel of the second connecting component extends backward from its front end to form a first insulating sealing section, a first conductive connecting section and a second insulating sealing section respectively. The length of the insulating sealing rod is sufficient to be able to seal and cooperate with the first insulating sealing section and the second insulating sealing section of the channel at the same time. The first insulating sealing section and the second insulating sealing section respectively have at least one convex ring protruding radially inward toward the channel for forming a radial abutment seal with the insulating sealing rod or the plug rod. The convex ring is integrally formed with the first insulating sealing section or the second insulating sealing section and is made of an elastomeric material; the insulating sealing rod is a rod-shaped member coated with an elastomeric material.

[0018] Among them, in order to improve the sealing performance, in one embodiment, the plug rod extends backward from its front end with a second conductive connection section and is wrapped with a third insulating sealing section made of an elastomeric material. When the first connection component and the second connection component are plugged together, the plug rod pushes the insulating sealing rod to slide backward along the hole, and its first conductive connection section contacts the second conductive connection section to achieve electrical connection. Its third insulating sealing section replaces the insulating sealing rod to seal with the convex ring on the first insulating sealing section.

[0019] Among them, in order to achieve the unlocking function, in one embodiment, the second connection component further includes an unlocking ring slidably sleeved on the second housing in the front-back direction, and a control ring for driving the unlocking ring to slide backward. An elastic reset element is provided at the rear end of the unlocking ring, and the elastic reset element provides a forward elastic restoring force for the unlocking ring.

[0020] Among them, in order to improve the user experience and the reliability of unlocking, in one embodiment, the unlocking ring is generally in an annular structure. An unlocking groove is provided on the outer periphery of the unlocking ring, and the unlocking groove is generally in a hooked shape. The unlocking groove is formed by connecting a first unlocking part that is concave in the axial direction of the unlocking ring and a second unlocking part that is generally in a slope shape in the circumferential direction of the unlocking ring; the control ring is generally in an annular structure. An unlocking roller is provided inside the control ring corresponding to the unlocking groove. The control ring is rotatably sleeved on the unlocking ring. The unlocking roller falls into the unlocking groove and is limited backward by the first unlocking part. When the control ring rotates along its circumferential direction, the unlocking roller can roll on the slope of the second unlocking groove through the oblique guidance of the second unlocking part, so that the unlocking ring slides backward relatively.

[0021] The present invention has the following beneficial effects: The present invention provides a sealing plug at the rear end of the insulating sealing rod to seal the water passing cavity, and forms an outer seal at the front end of the hole, establishing a multiple sealing structure, so that reliable seals are formed before and after the contact point between the first connection component and the second connection component. A water passing cavity is provided at the rear of the hole formed by the combination of the groove cover and the groove. Such a design can facilitate the installation of the insulating sealing rod and also facilitate the structural design of the first spring seat and the second spring seat to meet the requirements of sealing performance, and has greater flexibility in installation and design, greatly improving the reliability of the connector used in special environments such as underwater. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram (stereogram) of the male plug and the female plug in the embodiment;

[0023] Figure 2 is a schematic diagram of the male plug in the embodiment;

[0024] Figure 3 is a schematic diagram of the male plug and the female plug in the embodiment (top view, angle one);

[0025] Figure 4 is Figure 3 The sectional view at A-A in

[0026] Figure 5 a schematic diagram of the insertion channel at the front end of the male plug in the embodiment;

[0027] Figure 6 a schematic diagram of the position where the convex ring is arranged in the embodiment;

[0028] Figure 7 a schematic diagram of the water passing groove on the male plug colloid in the embodiment;

[0029] Figure 8 a schematic diagram of the female pin in the embodiment;

[0030] Figure 9 a schematic diagram of the insulating sealing rod in the embodiment;

[0031] Figure 10 the sectional view of the groove cover in the embodiment;

[0032] Figure 11 the three-dimensional view of the groove cover in the embodiment;

[0033] Figure 12 a schematic diagram of the overflow hole and the water passing hole in the embodiment;

[0034] Figure 13 a schematic diagram of the male pin in the embodiment;

[0035] Figure 14 a schematic diagram of the state when the male and female plugs are inserted and combined in the embodiment;

[0036] Figure 15 a schematic diagram of the overflow hole being blocked by the sealing plug in the embodiment;

[0037] Figure 16 a schematic diagram of the male and female plugs in the embodiment (top view, angle two);

[0038] Figure 17 is Figure 16 the sectional view at B-B in

[0039] Figure 18 the three-dimensional view of the unlocking ring in the embodiment;

[0040] Figure 19 the three-dimensional view of the operating ring in the embodiment;

[0041] Figure 20 the three-dimensional view of the split operating ring in the embodiment. Detailed implementation manners

[0042] To further illustrate the embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention, mainly used to illustrate the embodiments, and can be combined with the relevant descriptions in the specification to explain the operating principle of the embodiments. With reference to these contents, those of ordinary skill in the art should be able to understand other possible implementation manners and the advantages of the present invention. The components in the drawings are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0043] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation manners.

[0044] Referring to Figure 1 Figure 4 As shown, as a preferred embodiment of the present invention, a connector is provided, which includes a male plug 2 and a female plug 1 that can be docked and mated together. The male plug 2 has several female pins 20, and the female plug 1 has several male pins 10. When the male plug 2 and the female plug 1 are docked together, the male pins 10 can be inserted into the female pins 20 and cooperate with the female pins 20 in contact to complete the electrical connection between the male plug 2 and the female plug 1. At the same time, referring to Figure 2 and Figure 4 , the male plug 2 includes a male plug housing 22, and an insulating male plug encapsulating colloid 21 is embedded in the male plug housing 22 as the installation body for the female pins 20. Taking the respective plugging ends of the male plug 2 and the female plug 1 as the front ends, and at the same time referring to Figure 2 , Figure 5 and Figure 8 , a guiding hole 211 is opened at the front end of the male plug encapsulating colloid 21. The female pins 20 are embedded in the male plug encapsulating colloid 21. The female pins 20 include a wiring end 202 (connected to wires, signal lines, etc.) at the rear end, and a contact and cooperation end at the front end. The contact and cooperation end has a female pin jack 201 for cooperating with the male pins 10 in contact to achieve electrical connection. The contact and cooperation end of the female pins 20 is embedded in the middle section of the guiding hole 211 of the male plug encapsulating colloid 21. The female pin jack 201 and the guiding holes 211 (211') at its front and rear ends together form a plugging hole channel 300 that matches the outer shape of the male pins 10. Referring to Figure 4 and Figure 5 , an insulating sealing rod 25 with a size matching the plugging hole channel 300 is inserted into the plugging hole channel 300, so as to fill and seal the female pin jack 201; referring to Figure 6 , in the guiding holes 211 and 211' in front of and behind the female pin jack 201, two groups of convex rings protruding radially inward towards the guiding hole 211 are respectively provided. Each group of convex rings includes four convex rings 212 with the same structure. The convex rings 212 and the male plug encapsulating colloid 21 are integrally formed of plastic material, with good mechanical elasticity. The convex rings 212 press the insulating sealing rod 25 or the male pins 10 in the radial direction to form a sealing ring structure, improving the sealing effect in front of and behind the female pin jack 201.

[0045] Referring to Figure 4and Figure 7 , a water channel 400 is formed in the rear end of the male plug-in colloid 21 along the front-back direction in the plug-in channel 300. Corresponding to each water channel 400, a channel cover 26 is provided to cover the water channel 400. A substantially closed water cavity is formed by the combination of the channel cover 26 and the water channel 400. Refer to Figure 10 and Figure 11 , the channel cover 26 is made of an elastic material and is generally in the shape of a combined cover, including a cavity cover 261 that matches the shape of the water channel 400. A sealing ring 262 that surrounds and protrudes is provided on the cavity cover 261. When the channel cover 26 is covered in the installation groove 400, the sealing ring 262, which is also made of an elastic material, is in close contact with the male plug-in colloid 21 to form a more reliable seal; a step 266 extending in the front-back direction is provided inside the cavity cover 261. An overflow hole 263 is obliquely penetrated from the front step surface of the step 266 to the outside of the cavity cover 261 to form the only medium channel for the water cavity to communicate with the outside; continue to refer to Figure 10 , the cavity cover 261 has a first spring seat 500 for installing a return spring 28 on its inner side. The first spring seat 500 includes a step 266, a first spring base 267 that extends substantially radially along the male plug 2 from the step 266, a first spring sleeve column 264 that extends forward from the first spring base 267, and a first extension 265 that extends forward from the end of the first spring base 267. The first extension 265 and the step 266 surround and form a space for accommodating the return spring 28. The first extension 265 and the step 266 are also respectively used to block the sealing plug 253 of the insulating sealing rod 25 and the second spring base 251. Refer to Figure 4 , the rear end of the return spring 28 is sleeved on the first spring sleeve column 264 and is in the surrounded space of the first extension 265 and the step 266 to increase the stability of the return spring 28. The forward extension length of the first spring sleeve column 264 is slightly less than the forward extension lengths of the step 266 and the first extension 265, so as to form a recessed space into which the second spring sleeve column 252 of the insulating sealing rod 25 can extend. The outer shape of the front end of the first spring seat 500 generally matches the outer shape of the rear end of the insulating sealing rod 25.

[0046] As Figure 9 shown, the insulating sealing rod 25 is generally a rod-shaped member with rubber coating to ensure the insulating effect and sealing performance. At the same time, refer to Figure 4, the front end of the male needle 10 is a convex surface, and the front end of the insulating sealing rod 25 is a concave surface matching the convex surface of the male needle 10; the rear end of the insulating sealing rod 25 has a second spring seat 600, and the second spring seat 600 includes a second spring base 251 that forms a conflict with the return spring 28 and a second spring sleeve column 252 extending backward from the second spring base 251, and the front end of the return spring 28 is sleeved on the second spring sleeve column 252; corresponding to the overflow hole 263 on the slot cover 26, a sealing plug 253 is fixedly connected to the second spring base 251, and the rear end shape of the insulating sealing rod 25 formed by the combination of the sealing plug 253 and the second spring seat 600 roughly matches the shape of the front end of the first spring seat 500, so that when the male and female needles are plugged in, the remaining space between the insulating sealing rod 25 and the slot cover 26 is smaller, preventing too much medium (such as water) from remaining in the water passage cavity (reference Figure 14 or Figure 15 ).

[0047] The groove cover 26 and the water groove 400 are combined to form a water cavity behind the plug-in channel 300, and the second spring seat 600 at the rear end of the insulating sealing rod 25 is located in the water cavity, and the water cavity is connected to the outside through the overflow hole 263, see Figure 12 The male plug colloid 21 and the slot cover 26 are tightly embedded in the male plug housing 22, and the male plug housing 22, the male plug colloid 21 and the slot cover 26 are tightly sealed (at least at the position of the water passage cavity) from the male plug housing 22 radially inward by several set screws 200 (two in this embodiment). A water passage hole 220 is provided on the male plug housing 22 at a position corresponding to the overflow hole 263. The water passage hole 220 and the overflow hole 263 together form a water passage circuit of the water passage cavity, and the external structure of the male plug housing 22, such as the unlocking ring 23 and the operating ring 24, has a gap with the male plug housing 22 to allow the medium (such as water) to flow.

[0048] See also Figure 13 The female plug 1 has a male pin 10, and the rear end of the male pin 10 is embedded in the female plug package colloid 14. The male pin 10 has four male pins 10 that match the number and position of the female pin 20. The male pin 10 includes a metal part 101 at the front section and a plastic part 102 at the rear section. The plastic part 102 is wrapped with plastic at the rear section of the male pin 10. A secondary sealing ring 13 surrounding the male pin 10 is provided at the front end of the female plug package colloid 14 behind the male pin 10. When the male and female pins are connected, the secondary sealing ring 13 can be attached to the front end of the male plug package colloid 21 and surround the entrance of the guide hole 211, and together with the female plug package colloid 14, form a sealing structure for the entrance of the guide hole 211.

[0049] Sequence reference Figure 4 and Figure 14, during the mating process of the male and female connectors, the male pin 10 gradually approaches the guiding hole 211, and then the front convex surface of the male pin 10 comes into contact with the front concave surface of the insulating sealing rod 25. Since the two are mating spherical surfaces, during the insertion of the male pin 10, the medium such as liquid or gas in the concave surface of the insulating sealing rod 25 is gradually extruded from the bottom end to the front end of the concave surface, ensuring that there is a seal between the male pin 10 and the insulating sealing rod 25 without any residual medium. As the male connector 2 is inserted, the male pin 10 pushes the insulating sealing rod 25 to move backward, and finally inserts into the female pin socket 201 to contact the contact of the female pin 20, achieving electrical connection. During the entire process of the male pin 10 inserting into the female pin 20, due to the presence of the insulating sealing rod 25, the female pin 20 socket is always sealed, and there are no gaps between the male pin 10, the insulating sealing rod 25, and the insertion channel 300. When the male pin 10 inserts into the female pin 20, the plastic part 102 of the male pin 10 contacts and mates with the convex ring 212 in front of the female pin socket 201, replacing the original metal male pin 10. Compared with the contact between the hard metal material and the flexible plastic material, the contact between the plastic materials, which are both elastomers, can better improve the sealing performance. The contact seal between the convex ring 212 and the insulating sealing rod 25 or the male pin 10 forms the first sealing structure; at the same time, during the mating process of the male and female connectors, the second spring seat 600 at the rear end of the insulating sealing rod 25 gradually approaches the first spring seat 500, causing the medium in the water passing cavity to be discharged from the overflow hole 263. Finally, the sealing plug 253 on the second spring seat 600 is blocked by the step 266, and the sealing plug 253 abuts against the step 266, thereby blocking the overflow hole 263 to form the second sealing structure; moreover, when the mating of the male and female connectors is completed, the secondary sealing ring 13 abuts against the front end of the male connector package colloid 21 and surrounds the entrance of the guiding hole 211, jointly forming the third sealing structure for the entrance of the guiding hole 211 with the female connector package colloid 14.

[0050] Refer to Figure 15 , preferably in this embodiment, the sealing plug 253 is made of an elastic material, and the length L1 of the sealing plug 253 in the front-rear direction is greater than the distance L2 between the front end faces of the step 266 and the first extension 265 in the front-rear direction. This enables the sealing plug 253 to abut against the step 266 to block the overflow hole 263 before the second spring base 251 is blocked by the first extension 265 during the backward movement of the insulating sealing rod 25. When the insulating sealing rod 25 continues to move backward, the sealing plug 253 is pressed against the step 266, further improving the sealing performance.

[0051] In addition, it is worth noting that in order to discharge as much medium in the water passing cavity from the overflow hole 263 as possible, the overflow hole 263 is arranged at a position closer to the rear in the water passing cavity.

[0052] When the male and female plugs are connected, the insulating sealing rod 25 compresses the reset spring 28 to store energy. When the male and female plugs are unlocked, the reset spring 28 releases energy to reset the insulating sealing rod 25. Under the elastic restoring force of the reset spring 28, the front end of the insulating sealing rod 25 and the front end of the male needle 10 maintain a tight fit, thereby achieving sealing when the male needle 10 is pulled out.

[0053] See also Figure 4 In order to further improve the good contact between the male pin 10 and the female pin 20, a compression spring 27 is provided on the outer surface of the male plug colloid 21 near the front end, corresponding to the position of the female pin plug hole 201. The compression spring 27 is an elastic member, which extends roughly from front to back in a sheet shape and is slightly tilted at the rear end. Figure 3 Correspondingly, the female plug 1 has a pressing block 12, which is roughly a block-shaped structure. Figure 14 When the male plug 2 is docked with the female plug 1, the clamping block 12 can cooperate with the clamping spring 27. Since the clamping spring 27 is a structure with a raised rear end, the clamping block 12 pushes the clamping spring 27 roughly radially inward toward the male plug 2. Since the clamping spring 27 is arranged at a position corresponding to the female pin socket 201, and the male plug colloid 21 is made of elastic material, the female pin socket 201 will be pushed radially inward toward the male plug 2 by the male plug colloid 21, so that the female pin 20 socket and the male pin 10 are in further close contact, ensuring good electrical connection of the contacts.

[0054] This embodiment is provided with a water-passing cavity behind the plug-in channel 300 formed by the groove cover 26 and the water-passing groove 400. Such a design can facilitate the installation of the insulating sealing rod 25, and also facilitate the structural design of the first spring seat 500 and the second spring seat 600 to meet the sealing requirements, and has more flexibility in installation and design. At the same time, multiple sealing structures are established on top of this, so that the male and female plug contacts form reliable seals in front and behind them, greatly improving the reliability of the connector in special environments such as underwater.

[0055] Next, the specific locking and unlocking principles when plugging and unplugging female plug 1 and male plug 2 are introduced.

[0056] See also Figure 16 and Figure 17, the male plug 2 further includes an unlocking ring 23 in a cylindrical structure. The unlocking ring 23 is sleeved on the male plug housing 22 and can slide back and forth along the axial direction of the male plug housing 22. A buckle 31 is fixedly arranged on the male plug housing 22. A through hole for the hook-shaped head of the buckle 31 to expose is provided on the unlocking ring 23. Inside the female plug 1 housing, there is a buckle locking groove 32. When the male plug 2 and the female plug 1 are docked, the buckle locking groove 32 is engaged with the buckle 31 on the male plug 2 to form a lock; when unlocking, the unlocking ring 23 is slid backward, then the unlocking ring 23 touches the inclined surface of the hook-shaped head of the buckle 31, squeezing the buckle 31 inward to unlock it from the buckle locking groove 32.

[0057] As can be seen from the above, when unlocking the male and female plugs, it is necessary to drive the unlocking ring 23 to slide backward. In order to facilitate the application of force, in this embodiment, a manipulation mechanism for facilitating the driving of the unlocking ring 23 is provided, including a manipulation ring 24. Refer to Figure 17 and 18 , which show the specific structures of the unlocking ring 23 and the manipulation ring 24. The unlocking ring 23 has a card slot 232 arranged along its circumferential direction. Inside the manipulation ring 24, there is a first step 242. Referring to Figure 16 together, the first step 242 is clamped in the card slot 232. The manipulation ring 24 has a second step 243 at its rear end. The second step 243 forms a reduced diameter part to form a forward limit for the manipulation ring 24. At the rear end of the unlocking ring 23, there is a compression spring 29. The compression spring 29 is in a compressed state, so as to always give the unlocking ring 23 a forward driving force, and at the same time, when the unlocking ring 23 is moved backward, it provides a restoring force for the unlocking ring 23 to reset. In order to facilitate the installation of the manipulation ring 24, refer to Figure 19 , the manipulation ring 24 can be set into an upper and lower split structure. When installing, the two split parts are joined and assembled on the male plug 2 from the radial two sides of the male plug 2.

[0058] The unlocking ring 23 has an unlocking groove 231. Continuing to refer to Figure 17 , the unlocking groove 231 is a groove type arranged on the outer circumference of the unlocking ring 23 and in a hook shape, formed by connecting a first unlocking groove 2311 that is roughly concave in the axial direction and a second unlocking groove 2312 that is roughly sloped in the circumferential direction; the manipulation ring 24 is a cylindrical structure. Referring to Figure 4 and Figure 18 together, the front end of the manipulation ring 24 is sleeved on the unlocking ring 23. An unlocking roller 241 is arranged in the inner cavity of the manipulation ring 24 corresponding to the unlocking groove 231. When the manipulation ring 24 and the unlocking ring 23 are assembled together, the unlocking roller 241 is in the unlocking groove 231. Under the forward elastic restoring force of the compression spring 29, the unlocking ring 23 is pushed forward, and the unlocking roller 241 closely abuts in the concave first unlocking groove 2311 to form a locking position. Then:

[0059] 1. Since the unlocking roller 241 is closely attached to the first unlocking groove 2311, when the operating ring 24 is pulled backward, the operating ring 24 can drive the unlocking ring 23 to slide backward through the contact action between the unlocking roller 241 and the first unlocking groove 2311, thereby unlocking the male and female plugs.

[0060] Or:

[0061] 2. When the operating ring 24 is twisted circumferentially, the unlocking roller 241 can relatively roll to the top of the slope of the second unlocking groove 2312 (it may not reach the top of the slope) through the oblique guidance of the slope-shaped second unlocking groove 2312, and then the unlocking ring 23 slides backward relatively, thereby unlocking the male and female plugs.

[0062] During reset, the unlocking ring 23 is driven to reset by the elastic restoring force of the compression spring 29 forward. In case 1, the operating ring 24 and the unlocking ring 23 are synchronously pushed forward to reset; in case 2, the unlocking ring 23 is pushed forward to reset, while the operating ring 24 is reset through the rolling guidance of the second unlocking groove 2312.

[0063] In order to improve the reliability and stability of unlocking, two sets of unlocking rollers 241 and unlocking grooves 231 are symmetrically arranged at 180°. The matching structure between the operating ring 24 and the unlocking ring 23 in this embodiment provides two unlocking methods for driving the unlocking ring 23 to slide backward in the circumferential and axial directions. In specific applications, an appropriate operation plan can be selected according to the situation.

[0064] In this embodiment, a circumferential unlocking mechanism is formed through the rolling cooperation between the unlocking roller 241 and the inclined guide surface of the second unlocking groove 2312. However, the cooperation between the unlocking roller 241 and the second unlocking groove 2312 can also be replaced from rolling cooperation to sliding cooperation. For example, the unlocking roller 241 is replaced with a fixed cylindrical structure. When the operating ring 24 is twisted, the cylindrical structure is guided by the second unlocking groove 2312 to slide obliquely to the top of the slope of the second unlocking groove 2312 to achieve the same technical effect. However, the movement smoothness of this solution is not as good as the preferred solution of this embodiment.

[0065] In order to facilitate applying force to the operating ring 24, a handle can also be connected to the operating ring 24 to form a force application part for convenient operation.

[0066] In the description of this embodiment, the underwater environment of the connector is mostly used as an example for illustration. However, the connection provided by this embodiment can also be applied to fields such as waterproof connectors.

[0067] Although the present invention is specifically shown and introduced in combination with the preferred implementation, those skilled in the art should understand that various changes made to the present invention in form and detail without departing from the spirit and scope of the present invention defined by the appended claims all fall within the protection scope of the present invention.

Claims

1. An electrical connection device includes a first connection component and a second connection component that can be plugged into each other. The first connection component and the second connection component respectively have at least one set of insertion rods for achieving electrical connection and channels with a matching shape therewith. Taking the plugging ends of the first connection component and the second connection component as their respective front ends, an insulating sealing rod is movably assembled in the channel in the front-rear direction. A chamber communicating with the outside is provided behind the channel, and the rear end of the insulating sealing rod is located in the chamber. When the insertion rod is inserted into the channel and pushes the insulating sealing rod to slide backward along the channel, the insertion rod and the channel achieve electrical connection. It is characterized in that: The chamber is a substantially closed space and only has a medium channel for communicating with the outside. The rear end of the insulating sealing rod has a sealing plug. When the first connection component and the second connection component are plugged into each other, the sealing plug can block the medium channel as the insulating sealing rod moves backward, thereby completely closing the chamber. The channels of the second connection component extend backward from its front end to be a first insulating sealing section, a first conductive connection section, and a second insulating sealing section respectively. The length of the insulating sealing rod is such that it can be simultaneously sealingly fitted with the first insulating sealing section and the second insulating sealing section of the channel. At least one convex ring protruding radially inward toward the channel is respectively provided in the first insulating sealing section and the second insulating sealing section for forming a radially resisting seal with the insulating sealing rod or the insertion rod.

2. The electrical connection device according to claim 1, wherein: A sealing surface is provided behind the insertion rod, and a sealing ring is arranged around the insertion rod on the sealing surface. When the first connection component and the second connection component are plugged into each other, the opening surface at the front end of the channel is sealed by means of the sealing surface and the sealing ring.

3. The electrical connection device according to claim 2, wherein: The second connection component includes a second housing and a second mounting body made of insulating material embedded in the second housing. The channel is provided at the front end of the second mounting body. The first connection component includes a first housing and a first mounting body made of insulating material embedded in the first housing. The rear end of the insertion rod is embedded in the first mounting body, and a sealing ring surrounding the insertion rod is provided on the front end surface of the first mounting body. When the first connection component and the second connection component are plugged into each other, the opening surface at the front end of the channel is sealed by the abutting action of the front end surface of the first mounting body and the sealing ring against the front end of the second mounting body.

4. The electrical connection device according to claim 1, characterized in that: The second connection component includes a second housing and a second mounting body made of insulating material embedded in the second housing. The channel is provided at the front end of the second mounting body. The second mounting body is provided with a groove in the front-rear direction at the rear end of the channel, and further includes a groove cover. The groove cover is tightly closed on the groove to substantially seal the groove. The groove cover has an overflow hole serving as the medium channel, and the groove cover and the groove form the chamber.

5. The electrical connection device according to claim 4, characterized in that: A sealing ring protruding in a circular shape is provided on the side of the groove cover in contact with the groove.

6. The electrical connection device according to claim 4, characterized in that: It further includes a return spring for resetting the insulating sealing rod. The return spring is installed in the chamber. The groove cover has a first spring seat for installing the return spring on its inner side located in the chamber. The rear end of the insulating sealing rod has a second spring seat for installing the return spring. The shape of the front end of the first spring seat is substantially matched with the shape of the rear end of the second spring seat.

7. The electrical connection device according to claim 6, wherein: The slot cover has a step extending in the front-to-back direction on its inner side, and the overflow hole is opened obliquely from the front step surface of the step to the outer side of the slot cover. The slot cover also has a first extension portion extending in the front-to-back direction on its inner side. The first extension portion and the step together form a space for accommodating the return spring, and a first spring sleeve column for installing the return spring is provided between the first extension portion and the step.

8. The electrical connection device according to claim 7, wherein: The second spring seat includes a base that forms a counteracting effect with the return spring, and a second spring sleeve column extending backward from the base for mounting the return spring, and the sealing plug is arranged on the base.

9. The electrical connection device according to claim 8, characterized in that: The step and the first extension portion are located on the rearward movement path of the sealing plug and the base, and can respectively form a stop for the sealing plug and the base to move backward. The sealing plug is made of elastic material, and the length of the sealing plug in the front-to-back direction is greater than the distance between the front end faces of the step and the first extension portion in the front-to-back direction.

10. The electrical connection device according to claim 1, characterized in that: The medium channel is arranged at a rear position in the chamber.

11. The electrical connection device according to claim 3, characterized in that: A spring sheet is fixedly connected to the outer surface of the second mounting body, which is roughly extended forward and backward in a sheet shape and is tilted at the rear end. A clamping piece is provided on the first connecting component. When the first connecting component and the second connecting component are plugged together, the clamping piece can cooperate with the spring sheet and push the tilted end of the spring sheet roughly inward in the radial direction of the channel.

12. The electrical connection device according to claim 1, characterized in that: The convex ring and the first insulating sealing section or the second insulating sealing section are integrally formed and made of an elastomeric material; the insulating sealing rod is a rod-shaped member coated with rubber from an elastomeric material.

13. The electrical connection device according to claim 12, wherein: The plug rod extends backward from its front end to have a second conductive connection section and a third insulating sealing section wrapped with an elastomeric material. When the first connecting component and the second connecting component are plugged in, the plug rod pushes the insulating sealing rod to slide backward along the channel, and its first conductive connection section contacts the second conductive connection section to achieve electrical connection, and its third insulating sealing section replaces the insulating sealing rod and seals with the convex ring on the first insulating sealing section.

14. The electrical connection device according to claim 3, characterized in that: The second connecting assembly also includes an unlocking ring slidably mounted on the second shell body, and an operating ring for driving the unlocking ring to slide backward. An elastic reset element is provided at the rear end of the unlocking ring, and the elastic reset element provides a forward elastic restoring force for the unlocking ring.

15. The electrical connection device according to claim 14, characterized in that: The unlocking ring is roughly an annular structure, and an unlocking groove is provided on the outer circumference of the unlocking ring. The unlocking groove is roughly hook-shaped, and the unlocking groove is formed by connecting a first unlocking portion that is concave in the axial direction of the unlocking ring and a second unlocking portion that is roughly sloped in the circumferential direction of the unlocking ring; the operating ring is roughly an annular structure, and an unlocking roller is provided inside the operating ring corresponding to the unlocking groove. The operating ring can be rotatably mounted on the unlocking ring, and the unlocking roller falls into the unlocking groove and is limited backward by the first unlocking portion. When the operating ring rotates along its circumference, the unlocking roller can roll on the slope of the second unlocking portion through the oblique guidance of the second unlocking portion, thereby causing the unlocking ring to slide relatively backward.

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