Male end connector, female end connector and plug-in cable connector

Abstract

The utility model relates to the field of electric connectors, and discloses a male end connector, a female end connector and a plug-in cable connector, which comprise a plug body, a first terminal inserted in the plug body and a first connecting cylinder connected to the plug body, the first connecting cylinder comprises a cylinder body, a nut screwed at one end of the cylinder body and a sealing ring, an inner cavity at one end of the barrel is configured to be a mounting cavity, an abutting part is formed in the mounting cavity, and a pressing part is formed in the nut. The abutting portion is arranged in the mounting cavity, the pressing portion matched with the abutting portion is formed in the nut, and after the sealing ring is arranged in the mounting cavity, the nut is arranged on the barrel in a screwed mode, so that the pressing portion presses the sealing ring on the abutting portion, and the abutting portion and the pressing portion block the two ends of the sealing ring respectively. And in addition, the triple sealing effect is achieved through sealing of the nut, water and the like cannot permeate into the mounting cavity from the connecting position of the cylinder body and the sealing ring, and therefore the sealing effect of the sealing ring is better guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of electrical connectors, and in particular to a male connector, a female connector, and a pluggable cable connector. Background Technology

[0002] A cable connector is a device used to connect cables. It connects the conductors and insulation of a cable to other cables or devices to transmit power or signals.

[0003] Cable connectors consist of male and female connectors that connect via a plug-in interface. Power transmission is achieved through the mating of the male and female connectors. Both male and female connectors are typically made of conductors and insulation materials to ensure they can withstand current and voltage and maintain a stable connection. The insulation material of the male and / or female connectors is assembled from multiple components, and one end has a hole for the cable to pass through and connect to its internal first terminal. Because cable connectors are used in diverse environments, the presence of moisture can cause short circuits if it enters the connector through the hole. Therefore, a sealing ring is usually installed within the hole, working in conjunction with a nut and fastening mechanism to tightly encircle the cable and prevent moisture from entering the connector. However, the sealing ring's sealing of the cable mainly relies on the clamping of the fastening structure to reduce the gap. The empty structure through which the cable passes will be sealed, but the fastening structure is affected by the nut and can only be tightened to a state that matches the shape of the nut's inner cavity. If the gap between the outer diameter of the sealing ring and the inner diameter of the fastening structure is too large, it is difficult to achieve a sealing effect on the gap between the fastening structure and the nut by relying solely on the traditional fit between the nut and the fastening structure. Utility Model Content

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a male connector, a female connector and a pluggable cable connector to solve the problem of limited sealing effect between the fastening structure, nut and sealing ring.

[0005] To solve the above-mentioned technical problems, the present invention provides a male connector comprising a plug body having a mating slot, a first terminal inserted into the plug body and extending one end into the mating slot, and a first connecting cylinder connected to one end of the plug body. The first connecting cylinder comprises a cylinder body connected to one end of the plug body, a nut screwed onto the cylinder body at the end away from the plug body, and a sealing ring. The inner cavity at the end of the cylinder body away from the plug body is configured as a mounting cavity for mounting the sealing ring therein. A holding portion is formed in the mounting cavity that abuts against the inner end of the sealing ring axially. A pressing portion is formed in the nut that presses the sealing ring into the mounting cavity.

[0006] Furthermore, the abutment portion includes annular steps distributed circumferentially on the inner wall of the mounting cavity and abutment ribs protruding from the annular steps toward one side facing the sealing ring; the abutment ribs form an annular groove with their inner wall along the radial direction of the mounting cavity.

[0007] Furthermore, the cavity wall at the end of the mounting cavity away from the plug body is configured to have an elastic cavity wall that contracts or expands radially, and the nut is provided with a constraint portion for inwardly restraining the elastic cavity wall at the location corresponding to the elastic cavity wall; when the nut is screwed onto the cylinder, the constraint portion causes the elastic cavity wall to tilt towards the center to press the sealing ring.

[0008] Furthermore, the elastic cavity wall is provided with a plurality of slits, which are distributed circumferentially around the mounting cavity, and each slit penetrates the elastic cavity wall in the direction of the nut and also in the radial direction; the pressing part is configured to protrude from the inner wall of the end of the nut away from the plug body, the pressing part has an annular structure, and its inner wall surface is a guide slope that is inclined inward and away from the plug body, the guide slope such that the inner diameter of the pressing part near the plug body is larger than the outer diameter of the elastic cavity wall, and the inner diameter of the end away from the plug body is smaller than the outer diameter of the sealing ring; the guide slope is used to squeeze the elastic cavity wall during the process of the nut being screwed into the cylinder to deform it inward and press the outer wall surface and end face of the sealing ring.

[0009] Furthermore, the outer wall of the cylindrical body at the end away from the plug body is provided with an external thread, and the external thread is distributed on the mounting cavity at the end near the plug body; the inner wall of the nut is provided with an internal thread that mates with the external thread, and the internal thread and the pressing part are distributed sequentially along the axial direction away from the plug body.

[0010] Furthermore, the cylindrical body includes a first tube with a supporting portion, a second tube for connecting to the plug body, and a third tube integrally connected at both ends to the first tube and the second tube respectively. The mounting cavity is formed in the first tube, and the nut is screwed onto the first tube.

[0011] Furthermore, the plug body is detachably connected to a dustproof part for blocking the slot, the dustproof part including a protective cover for being detachably connected to the plug body to block the slot and a connecting part with one end connected to the protective cover.

[0012] Furthermore, a first collar is formed on one end of the connecting part for fitting onto the cable connected to the male connector, and a second collar is formed on the other end of the connecting part for connecting onto the protective cover; the first collar has a circular first inner hole, and an auxiliary hole is formed on the wall of the first inner hole that extends axially along the first inner hole to facilitate the cable passing through the first inner hole.

[0013] Furthermore, the protective cover has a connecting groove and a recessed surface on both sides for screwing into the plug body. The connecting groove is provided with a first sealing gasket for sealing the slot when the protective cover is screwed onto the plug body. The second collar is connected to the dust cover by a screw.

[0014] This utility model also provides a female connector including a socket body, a second terminal inserted into the socket body, a second connecting tube connected to one end of the socket body with the same structure as the first connecting tube of the male connector, and a connecting sleeve connected to the other end of the socket body. The plug body has a mating portion for insertion into the mating slot of the male connector, and the connecting sleeve is spaced around the mating portion.

[0015] This utility model also provides a pluggable cable connector including a male connector and a female connector for mating with the male connector.

[0016] The male connector, female connector, and pluggable cable connector of this utility model have at least the following beneficial effects: by providing an abutment part in the mounting cavity and forming a pressing part that cooperates with the abutment part in the nut, after the sealing ring is set in the mounting cavity, the pressing part presses the sealing ring against the abutment part by screwing the nut onto the cylinder, so that the abutment part and the pressing part respectively block both ends of the sealing ring. In addition, the sealing of the nut achieves a triple sealing effect, preventing water and other substances from penetrating into the mounting cavity from the connection between the cylinder and the sealing ring, thereby better ensuring the sealing effect of the sealing ring. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0018] Figure 1 This is a schematic diagram of the male connector of this utility model;

[0019] Figure 2 This is an exploded view of the male connector of this utility model;

[0020] Figure 3 This is an exploded view of the male connector of this utility model from another angle;

[0021] Figure 4 This is a side sectional view of the male connector of this utility model;

[0022] Figure 5 This is a partial side cross-sectional view of the male connector of this utility model, showing that the supporting part and the pressing part are not mated.

[0023] Figure 6 This is a schematic diagram of the structure of the female connector of this utility model;

[0024] Figure 7 This is an exploded view of the female connector of this utility model;

[0025] Figure 8 This is an exploded view of the female connector of this utility model from another angle;

[0026] Figure 9 This is a side sectional view of the female connector of this utility model.

[0027] The meanings of the labels in the attached diagram are as follows:

[0028] Plug body 11, first section 111, second section 112, third section 113, stepped surface 114, first groove 115, first partition 116, first cavity structure 117, anti-foolproof protrusion 118, second groove 119, second partition 121, second cavity structure 122, first socket 123, first terminal 13, mating section 131, first insertion section 132, first wiring section 133, tight-fitting protrusion 134, slot 135, slot 136, mating slot 14, wiring groove 15, dustproof part 2, connecting part 21, first collar 211, first inner hole 212, auxiliary hole 213, second collar 214, second inner hole 215, protective cover 22, first connecting groove 221, recessed surface 222, connecting block 223, thread Hole 224, screw 225, first sealing gasket 226, first connecting cylinder 3, cylinder body 31, first tube body 311, second tube body 312, third tube body 313, fastening strip 314, elastic cavity wall 315, slit 316, nut 32, sealing ring 33, supporting part 34, annular step 341, supporting rib 342, annular groove 343, pressing part 35, guide slope 351, mounting cavity 36, socket body 4, fourth section 41, interlocking part 4a, plug block 411, insertion hole 412, fifth section 42, second insertion hole 421, sixth section 43, Y-shaped groove 44, second terminal 5, plug section 51, mating groove 511, second insertion section 52, second wiring section 53, second connecting cylinder 6, connecting sleeve 7, inner ring 71. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings.

[0030] The pluggable cable connector of this utility model includes a male connector and a female connector, which are plugged into each other to enable the conduction of electrical signals after power is applied.

[0031] Please refer to Figures 1 to 5 The male connector of this utility model includes a plug body 11 with a mating slot 14, a first terminal 13 inserted into the plug body 11 and extending one end into the mating slot 14, a dustproof part 2, and a first connecting tube 3 connected to one end of the plug body 11. The plug body 11 connects or disconnects from the female connector by mating with the mating slot 14. The first terminal 13 extends into the mating slot 14 and transmits electrical signals with the female connector when the female connector is mated with the mating slot 14. The dustproof part 2 is connected to the plug body 11 when the mating slot 14 is not in use to seal the mating slot 14 and prevent moisture from entering. The first connecting tube 3 facilitates the connection between the cable and the plug body 11 and protects the cable.

[0032] In this embodiment, the plug body 11 has, along the axial direction, a first segment 111, a second segment 112, and a third segment 113, all of which are cylindrical. The second segment 112 is located between the first segment 111 and the third segment 113 and has a diameter larger than the diameters of the first segment 111 and the third segment 113, so that the second segment 112 protrudes outward relative to the first segment 111 and the third segment 113 to form an annular stepped surface 114. To facilitate the arrangement of subsequent structures, the diameter of the first segment 111 is larger than the diameter of the third segment 113. A first groove 115 is recessed from the second segment 112 on one end of the plug body 11, that is, on the end face of the first segment 111 facing away from the third segment 113. The first groove 115 has a cylindrical structure. A Y-shaped first partition 116 is integrally formed within the first groove 115. The three forked ends of the first partition 116 extend from the center of the first groove 115 to the groove wall of the first groove 115 in different directions, dividing the first groove 115 into three first cavity structures 117. These three first cavity structures 117 are collectively defined as slots 14, and each slot 14 is adapted to a corresponding structure of the female connector so that the corresponding structure can be inserted into the slot 14. Preferably, the end of the first partition 116 furthest from the third segment 113 is substantially flush with one side of the groove opening of the first groove 115. To ensure greater stability of the female connector's corresponding structure when inserted into the slot 14, anti-fooling protrusions 118 are provided on the sidewall of the first groove 115 containing at least one first cavity structure 117. The anti-fooling protrusions 118 extend uniformly along the axial direction of the first segment 111, allowing the female connector's corresponding structure, after having a groove structure adapted to the anti-fooling protrusion 118, to be inserted into the slot 14 along the axial direction of the first segment 111. This increases the tightness of the connection between the female connector and the plug assembly, improving stability. In one embodiment, two anti-fooling protrusions 118 are provided and disposed within two of the first cavity structures 117, with each anti-fooling protrusion 118 spaced apart from the first partition 116. In another embodiment, three anti-fooling protrusions 118 are provided and disposed within three first cavity structures 117. It should be noted that each anti-fooling protrusion 118 must not obstruct the position and use of the first terminal 13 in the axial direction. In order to facilitate connection and mating with the female connector, a second connecting part is formed on the outer wall of the first segment 111. The second connecting part is a helical external thread wrapped around the outer wall of the first segment 111 for connection with the female connector.

[0033] In this embodiment, three first insertion holes 123 are provided on the second segment 112 along the axial direction, which pass through the third segment 113. One end of the three first insertion holes 123 is connected to the three first cavity structures 117 along the axial direction.

[0034] In this embodiment, a second groove 119 is recessed into the end face of the third segment 113 on the other end of the plug body 11, extending to the second segment 112. The second groove 119 has a cylindrical structure. A Y-shaped second partition 121 is integrally formed within the second groove 119. The three mutually distant forked ends of the second partition 121 extend backward from the center of the second groove 119 in different directions, and the three forked ends of the second partition 121 are spaced apart from the sidewalls of the second groove 119, so that the second partition 121 divides the second groove 119 into three interconnected second cavity structures 122. The three interconnected second cavity structures 122 are collectively defined as the wiring groove 15. The other end of the first socket 123 is axially connected to the three second cavity structures 122. A first connecting part is formed on the outer wall of the third segment 113. The first connecting part is an external thread wrapped around the outer wall of the third segment 113. When the third segment 113 is connected to the plastic structure, the external thread can increase the bonding force with the plastic structure and improve the tightness and stability.

[0035] In this embodiment, the first terminals 13 are made of conductive metal such as copper. Three first terminals 13 are respectively inserted into three first sockets 123, and both ends of the three first terminals 13 extend axially into the slot 14 and the wiring groove 15, respectively. Each first terminal 13 is spaced apart from the first partition 116 and the second partition 121. Each first terminal 13 has a cylindrical insertion section 131, a second insertion section 52 connected to the insertion section 131 and used for insertion into the first socket 123, and a first wiring section 133 connected to the second insertion section 52. The insertion section 131 extends into the slot 14 but is shorter than the depth of the slot 14. The end of the insertion section 131 has a hemispherical arc surface to facilitate insertion into the corresponding structure of the female connector. Both the second insertion section 52 and the first socket 123 are cylindrical with a diameter slightly larger than that of the connecting section 131, so that the first terminal 13 can be installed on the plug body 11 via the connecting section 131 during installation. Several tight-fitting protrusions 134 are provided on the outer wall of the second insertion section 52, surrounding the outer wall of the second insertion section 52. When the second insertion section 52 is inserted into the first socket 123, the tight-fitting protrusions 134 abut against the inner wall of the first socket 123. The first wiring section 133 is also cylindrical with a diameter larger than that of the first socket 123, so as to limit the insertion depth of the connecting section 131 and prevent the first wiring section 133 from penetrating into the first socket 123. An annular groove is recessed on the outer wall of the first wiring section 133, and a slot 135 for inserting a cable is provided at the end of the first wiring section 133, with the slot 135 open at one end facing away from the insertion section 51. To facilitate cable installation within the slot 135, the first terminal segment 133 is halved axially towards the second insertion segment 52 at the end furthest from the insertion segment 131. Then, on the side near the annular groove, it is further bent and divided into an arc to the side wall of the first terminal segment 133, forming a slot 136 that connects to the slot 135. The cable passes through the slot 136 more easily for installation. The cable can then be welded into the slot 135, achieving electrical connection between the first terminal 13 and the cable. This specific structure is existing technology and will not be described in detail here.

[0036] In this embodiment, the dustproof part 2 includes a connecting part 21 detachably connected to the plug assembly and a protective cover 22 connected to the end of the connecting part 21 away from the plug assembly. The connecting part 21 is used to connect the protective cover 22 to the plug body 11 so that the protective cover 22 can be used at any time when needed. The protective cover 22 covers the slot 14 by being detachably connected to the plug assembly, thereby preventing dust and other substances from entering the covered slot 14. Since the third segment 113 of the plug body 11 will be connected to the injection molding structure in actual use, one end of the third segment 113 of the plug body 11 usually does not need to be dustproofed. As a precaution, the protective cover 22 can be placed on the first segment 111 through the first connecting part.

[0037] In this embodiment, the connecting part 21 is made of a material with a certain degree of toughness and flexibility, such as nylon. A first collar 211 for fitting onto the cable is formed at one end of the connecting part 21. The first collar 211 is annular and has a first inner hole 212. The diameter of the first inner hole 212 is circular and matches the outer diameter of the corresponding cable. Preferably, the diameter of the first inner hole 212 is slightly smaller than the diameter of the cable, so that the first collar 211 can be tightly fitted onto the cable through the first inner hole 212. It should be noted that the first collar 211 should be fitted onto the cable before the cable is inserted into the nut 32 and the cylinder 31. Because the diameter of the first inner hole 212 is smaller than the diameter of the external thread on the cable, an auxiliary hole 213 is provided on the wall of the first inner hole 212 to facilitate the insertion of the first connecting part into the first inner hole 212 and prevent damage to the first collar 211 caused by compression of the first inner hole 212. The auxiliary hole 213 includes a strip-shaped hole that is closer to the first inner hole 212 in the radial direction and a circular hole that is further away from the first inner hole 212. One end of the strip-shaped hole is close to and communicates with the first inner hole 212, and the other end of the strip-shaped hole communicates with the circular hole. In use, the auxiliary hole 213 can enlarge the first inner hole 212 when it is compressed by the first section 111, so that the first collar 211 can be fitted onto the cable without damage. A second ring 214 for connecting to the protective cover 22 is formed on the other end of the connecting part 21. The second ring 214 has a circular structure and its inner and outer diameters are both smaller than the diameter of the first inner hole 212 of the first ring 211. The second ring 214 has a second inner hole 215.

[0038] The protective cover 22 is injection molded from rigid plastic and has a cylindrical structure. The protective cover 22 has a first connecting groove 221 and a recessed surface 222 on its two axially oriented sides, both of which are cylindrical groove structures. The depth of the recessed surface 222 is less than the depth of the first connecting groove 221. The inner wall of the first connecting groove 221 has a first internal thread adapted to the external thread of the second connecting part. In another embodiment, the first internal thread also adapts to the external thread on the first connecting part, so that the first connecting groove 221 can be threadedly connected to one of the first and second connecting parts through the first internal thread, thereby blocking the slot 14 or the wiring groove 15. A first sealing gasket 226 is inserted into the first connecting groove 221. The first sealing gasket 226 is used to seal the slot 14 when connected to the second connecting part to cover the first section 111. A connecting block 223 is provided on the recessed surface 222. The connecting block 223 has a cylindrical structure and protrudes from the center of the recessed surface 222. A threaded hole 224 is provided on the connecting block 223, extending axially away from the first connecting groove 221. A screw 225 is screwed into the threaded hole 224. The diameter of the head of the screw 225 is larger than the diameter of the second collar 214. The diameter of the first inner hole 212 of the second collar 214 is larger than the diameter of the portion of the screw 225 other than the head. During assembly, the screw 225 is screwed into the threaded hole 224 after passing through the first inner hole 212, thus completing the connection between the second collar 214 and the protective cover 22.

[0039] In this embodiment, the first connecting cylinder 3 includes a cylinder 31 connected to one end of the plug body 11, a nut 32 screwed onto the cylinder 31 away from the end of the plug body 11, a sealing ring 33, a supporting portion 34 formed within the cylinder 31, and a pressing portion 35 formed within the nut 32. The hollow interior of the cylinder 31, away from the end of the plug body 11, is configured as a mounting cavity 36. The sealing ring 33 is mounted within the mounting cavity 36. The supporting portion 34 is formed within the mounting cavity 36 and abuts against the inner end of the sealing ring 33 along the axial direction of the cylinder 31, i.e., against the end of the sealing ring 33 near the plug body 11. The cylinder 31 is used for the cable to pass through and connect to the plug body 11, thereby facilitating the connection of the cable inside the cylinder 31 to the first terminal 13 and then connecting the cylinder 31 to the plug body 11 to protect the cable and the first terminal 13. Nut 32 facilitates the passage of all cables in a bundle. After nut 32 is connected to cylinder 31, the pressing part 35 on nut 32 presses the sealing ring 33 into the mounting cavity 36 and abuts against the supporting part 34, so that the two ends of the sealing ring 33 abut against the supporting part 34 and the pressing part 35 respectively to form a sealing state, thereby preventing external moisture from entering the mounting cavity 36 from the gap at the connection between nut 32 and cylinder 31 and causing short circuits.

[0040] In this embodiment, the cylindrical body 31 is typically made of plastic. The cylindrical body 31 includes a first tube 311, a second tube 312 for connection to the plug body 11, and a third tube 313 integrally connected to the first tube 311 and the second tube 312 at both ends. The first tube 311, the third tube 313, and the second tube 312 are sequentially integrally formed and coaxial. The first tube 311 is located at the end of the cylindrical body 31 away from the plug body 11, and the second tube 312 is located at the end of the cylindrical body 31 closer to the plug body 11. A mounting cavity 36 is formed within the first tube 311, allowing a supporting portion 34 to be formed within the first tube 311. A nut 32 is screwed onto the first tube 311. The first tube 311 has a cylindrical structure and external threads formed on its outer wall to facilitate connection with the nut 32. To facilitate the fastening of the sealing ring 33, a fastening ring is formed on the end of the first tube 311 away from the plug body 11. The fastening ring includes several fastening strips 314 with quadrilateral cross sections. Each fastening strip 314 is arranged in a ring array along the circumference of the first tube 311 on the end face of the first tube 311 away from the plug body 11, and each fastening strip 314 extends in a direction parallel to the axial direction of the tube 31. The cavity portion enclosed by the inner side of each fastening strip 314 is part of the mounting cavity 36. The cavity wall of the mounting cavity 36 away from the plug body 11, that is, the portion of the mounting cavity 36 enclosed by the inner side of each fastening strip 314, is configured as an elastic cavity wall 315. Each fastening strip 314 is integrally connected to the first tube 311 and has a certain elasticity due to being a plastic support. Therefore, when each fastening strip 314 is compressed, the elastic cavity wall 315 will contract radially or open after the applied force is removed. Since the fastening strips 314 are spaced apart, a number of slits 316 are formed on the elastic cavity wall 315. These slits 316 are spaced apart axially around the mounting cavity 36. Each slit 316 penetrates the elastic cavity wall 315 towards the nut 32 and also penetrates the elastic cavity wall 315 radially, so that the fastening strips 314 can contract or expand after being compressed or uncompressed, allowing them to be used to fix or loosen the sealing ring 33. The inner and outer diameters of the second tube 312 are both larger than the inner diameter of the third tube 313. An internal thread for threaded connection with the first connecting part is formed on the inner wall of the second tube 312. During assembly, the third section 113 is screwed into the second tube 312 through the first connecting part, and the end face of the second tube 312 away from the first tube 311 abuts against the stepped surface 114. The third tube 313 is located between the first tube 311 and the second tube 312, and its inner cavity is connected to the inner cavities of the first tube 311 and the second tube 312, respectively. To facilitate assembly, the outer wall of the second tube 312 is polygonal prism-shaped to increase friction when manually or mechanically connecting the cylinder 31 and the plug body 11.

[0041] In this embodiment, the nut 32 is typically made of plastic. Both the nut 32 and the first tube 311 are cylindrical. The nut 32 is hollow and extends through both ends axially. An internal thread, compatible with the external thread on the first tube 311, is provided on the inner wall of the nut 32. The axial length or height of the inner cavity of the nut 32 is greater than the axial length of the fastening strip 314, allowing the nut 32 to be threadedly connected to the first tube 311 even after the fastening strip 314 is inserted. After assembly, the inner wall of the nut 32 abuts against the fastening strips 314 to a certain extent, and the threaded engagement between the first tube 311 and the nut 32 achieves a preliminary seal.

[0042] In this embodiment, the sealing ring 33 has a cylindrical structure and its outer diameter is adapted to the diameter of the mounting cavity 36 so that it can be inserted into it. The sealing ring 33 and the mounting cavity 36 have the same length or height in the axial direction. The cavity wall portion of the mounting cavity 36 corresponding to the first tube 311 provides support and constraint for the sealing ring 33, while the elastic cavity wall 315 is used to fasten the sealing ring 33.

[0043] In this embodiment, the supporting portion 34 includes an annular step 341 distributed circumferentially on the inner wall of the mounting cavity 36 and a supporting rib 342 protruding from the annular step 341 toward the side of the sealing ring 33. The annular step 341 provides support for the supporting rib 342 and the sealing ring 33 and limits the penetration depth of the sealing ring 33. The supporting rib 342 reduces interference with the sealing ring 33 while making less contact with the end face of the sealing ring 33 and sealing it. When the sealing ring 33 is supported on the supporting rib 342, an annular groove 343 is formed between the supporting rib 342 and the inner wall of the mounting cavity 36 in the radial direction of the mounting cavity 36, so that air is blocked in the annular groove 343. The inner wall of the third tube 313 protrudes inward in an annular shape relative to the wall of the mounting cavity 36. This inward protrusion of the inner wall of the third tube 313 forms an annular step 341 on one side of the mounting cavity 36, axially close to the inner wall of the third tube 313. The supporting ribs 342 are distributed annularly along the circumference of the annular step 341, and protrude axially away from the plug body 11, forming the annular groove 343 between the supporting ribs 342 and the inner wall of the mounting cavity 36. To facilitate the installation of the sealing ring 33, the outer diameter of the sealing ring 33 is slightly smaller than the diameter of the mounting cavity 36, creating a gap between the sealing ring 33 and the mounting cavity 36 after installation. This gap is axially aligned with the annular groove 343. Therefore, even though the threaded engagement of the first tube body 311 and the nut 32 seals the gap, the setting of the supporting rib 342 further enhances the sealing effect.

[0044] In this embodiment, the retaining portion 35 is configured to protrude from the inner wall of the end of the nut 32 away from the plug body 11. The internal thread and the retaining portion 35 are distributed sequentially along the axial direction away from the plug body 11. The retaining portion 35 has an annular structure and protrudes radially from the inner wall of the nut 32. The inner wall surface of the retaining portion 35 has an inwardly inclined guide slope 351 that is inclined away from the plug body 11. That is, the side of the guide slope 351 away from the plug body 11 is inclined inwardly relative to the side closer to the plug body 11. The guide slope 351 causes the inner diameter of the end of the pressing part 35 near the plug body 11 to be larger than the outer diameter of the elastic cavity wall 315, and the inner diameter of the end of the pressing part 35 away from the plug body 11 to be smaller than the outer diameter of the sealing ring 33. Therefore, during assembly, the guide slope 351 is used to compress the elastic cavity wall 315 as the nut 32 is screwed onto the cylinder 31, causing it to deform inward and press against the outer wall surface and end face of the sealing ring 33. Thus, the elastic cavity wall 315 abuts against the sealing ring 33, securing the sealing ring 33. The abutment between the guide slope 351 and the sealing ring 33 further seals the other side of the gap, achieving multiple seals in conjunction with the supporting rib 342. The guide slope 351 formed on the nut 32 is further defined as a constraint part, which is provided corresponding to the elastic cavity wall 315 and is used to compress and constrain the elastic cavity wall 315 inward. When the nut 32 is screwed onto the cylinder 31, the restraint causes the elastic cavity wall 315 to tilt inward to press the sealing ring 33.

[0045] Please refer to Figures 6 to 9 The female connector of this utility model includes a socket body 4, a second terminal 5 inserted into the socket body 4, a second connecting cylinder 6 connected to one end of the socket body 4 with the same structure as the first connecting cylinder 3, and a connecting sleeve 7 connected to the other end of the socket body 4. The plug body 11 has a mating part 4a for being inserted into the mating slot 14. The connecting sleeve 7 is spaced around the mating part 4a so that after the mating part 4a is inserted into the mating slot 14, the connecting sleeve 7 can be threadedly connected to the first section 111 of the plug body 11 to realize the connection between the male connector and the female connector and prevent it from falling off. The second terminal 5 is used to connect with the first terminal 13 when the mating part 4a is inserted into the mating slot 14, thereby realizing the electrical connection.

[0046] In this embodiment, the socket body 4 has a fourth segment 41, a fifth segment 42 and a sixth segment 43, all of which are cylindrical in shape, along the axial direction. The fifth segment 42 is located between the fourth segment 41 and the sixth segment 43 and has a diameter larger than the diameters of the fourth segment 41 and the sixth segment 43, so that the fifth segment 42 protrudes outward relative to the fourth segment 41 and the sixth segment 43 and also forms a circular stepped surface 114. The fourth segment 41 is a solid cylindrical structure with a diameter that matches the first groove 115. At the end face of the fourth segment 41 of the socket body 4, away from the sixth segment 43, a Y-shaped groove 44 is formed corresponding to the first partition 116 of the plug body 11. Each side of the Y-shaped groove 44 away from the center connects radially to the fourth segment 41 to form a three-way connection, thus dividing the fourth segment 41 into three spaced-apart plugs 411 that interlock with the three first cavity structures 117. Each plug 411 has a recessed insertion hole 412 corresponding to the insertion segment 131 of the first terminal 13, allowing the insertion segment 131 to pass through. The first partition 116 is inserted into the Y-shaped groove 44 during insertion. A foolproof groove is also provided on the plug 411 corresponding to the foolproof protrusion 118. The fifth segment 42 has three second insertion holes 421 that are axially connected to the three insertion holes 412, where the second terminal 5 is installed.

[0047] In this embodiment, a second groove 119 and a second partition 121 are recessed on the other end of the socket body 4, i.e., the sixth segment 43, facing away from the fourth segment 41, extending to the fifth segment 42. The second groove 119 and the second partition 121 on the sixth segment 43 have the same structure as the second groove 119 and the second partition 121 on the plug body 11, thus forming a wiring groove 15 on the sixth segment 43. An external thread is formed on the outer wall of the sixth segment 43, which is threaded to the second tube 312 of the second connecting cylinder 6 (since the structure of the second connecting cylinder 6 is completely identical to that of the first connecting cylinder 3, the second connecting cylinder 6 also has a cylinder 31, a nut 32, a sealing ring 33, a supporting part 34, and a pressing part 35).

[0048] In this embodiment, the second terminals 5 are made of conductive metal such as copper. Three second terminals 5 are respectively inserted into three second sockets 421, and both ends of the three second terminals 5 extend axially into the insertion hole 412 and the wiring groove 15, respectively. Each second terminal 5 has a cylindrical insertion section 51, a second insertion section 52 connected to the insertion section 51 and used for insertion into the second socket 421, and a second wiring section 53 connected to the second insertion section 52. The insertion section 51 extends into the insertion hole 412 but is shorter than the depth of the insertion hole 412. A mating groove 511 is formed on the insertion section 51 for the insertion segment 131 to pass through. Both the second insertion section 52 and the second socket 421 have a cylindrical structure with a diameter slightly larger than the insertion section 51, so that the first terminal 13 can be installed on the socket body 4 via the insertion segment 131 during installation. On the outer wall of the second insertion section 52, several tight-fitting protrusions 134 are also provided, which surround the outer wall of the second insertion section 52. When the second insertion section 52 is inserted into the second socket 421, the tight-fitting protrusions 134 abut against the inner wall of the second socket 421. The second wiring section 53 is also cylindrical and its diameter is larger than that of the second socket 421, so as to limit the insertion depth of the insertion section 51 and prevent the second wiring section 53 from penetrating into the second socket 421. The structure of the second wiring section 53 is completely the same as that of the first wiring section 133 and has the same function, so it will not be described again here.

[0049] In this embodiment, the connecting sleeve 7 is also made of plastic. The connecting sleeve 7 is hollow inside, and an internal thread is formed on the inner wall for threaded connection with the first segment 111. An inner ring 71 is circumferentially protruding inward on the inner wall of one end of the connecting sleeve 7, which is adapted to the stepped surface 114. The sixth segment 43 can pass through the inner ring 71. During assembly, after the connecting sleeve 7 is fitted through the sixth segment 43, the inner ring 71 abuts against the stepped surface 114. The end of the connecting sleeve 7 away from the inner ring 71 surrounds the fourth segment 41 and forms a gap between the fourth segments 41 for the first segment 111 to pass through, thereby facilitating the mating connection between the slot 14 and the insert 411. To ensure the sealing of the connecting sleeve 7, a sealing ring is fitted on the fourth segment 41 for abutting between the connecting sleeve 7 and the outer wall of the fourth segment 41.

[0050] The working method of one embodiment of the male connector, female connector and pluggable cable connector of this utility model is as follows: During assembly, after aligning the slot 14 and the plug 411, the slot 14 is moved toward the plug 411 in the axial direction. During the movement of the male connector, the connecting sleeve 7 is rotated so that the connecting sleeve 7 is gradually screwed onto the fourth segment 41 until each plug 411 is inserted into each first cavity structure 117 and the plug segment 131 is inserted into the mating groove 511. The connection between the connecting sleeve 7 and the fourth segment 41 is completed, thereby completing the connection between the male connector and the female connector.

Claims

1. A male connector, comprising a plug body having a mating slot, a first terminal inserted into the plug body and extending one end into the mating slot, and a first connecting sleeve connected to one end of the plug body, the first connecting sleeve comprising a cylindrical body connected to one end of the plug body, a nut screwed onto the cylindrical body at the end away from the plug body, and a sealing ring, characterized in that: The inner cavity at one end of the cylindrical body away from the plug body is configured as a mounting cavity for the sealing ring to be installed therein. A retaining portion is formed in the mounting cavity that abuts against the inner end of the sealing ring along the axial direction. A pressing portion is formed in the nut that presses the sealing ring into the mounting cavity.

2. The male connector as described in claim 1, characterized in that: The abutting portion includes annular steps distributed circumferentially on the inner wall of the mounting cavity and abutting rib protruding from the annular steps toward one side facing the sealing ring; the abutting rib forms an annular groove with its inner wall in the radial direction of the mounting cavity.

3. The male connector as described in claim 1, characterized in that: The cavity wall at the end of the mounting cavity away from the plug body is configured to have an elastic cavity wall that contracts or expands radially. The nut is provided with a constraint portion corresponding to the elastic cavity wall for inwardly restraining the elastic cavity wall. When the nut is screwed onto the cylinder, the constraint portion causes the elastic cavity wall to tilt toward the center to press the sealing ring.

4. The male connector as described in claim 3, characterized in that: The elastic cavity wall is provided with a plurality of slits, which are distributed circumferentially around the mounting cavity. Each slit penetrates the elastic cavity wall in the direction of the nut and also in the radial direction. The pressing part is configured to protrude from the inner wall of the end of the nut away from the plug body. The pressing part has an annular structure, and its inner wall surface is a guide slope that is inclined inward and away from the plug body. The guide slope makes the inner diameter of the pressing part near the plug body larger than the outer diameter of the elastic cavity wall, and the inner diameter of the end away from the plug body smaller than the outer diameter of the sealing ring. The guide slope is used to squeeze the elastic cavity wall during the process of screwing the nut into the cylinder to deform it inward and press the outer wall surface and end face of the sealing ring.

5. The male connector as described in claim 4, characterized in that: The outer wall of the cylindrical body at the end away from the plug body is provided with an external thread, and the external thread is distributed on the mounting cavity at the end near the plug body; the inner wall of the nut is provided with an internal thread that mates with the external thread, and the internal thread and the pressing part are distributed sequentially along the axial direction away from the plug body.

6. The male connector as described in claim 1, characterized in that: The plug body is detachably connected to a dustproof part for blocking the slot. The dustproof part includes a protective cover for being detachably connected to the plug body to block the slot and a connecting part with one end connected to the protective cover.

7. The male connector as described in claim 6, characterized in that: One end of the connecting part has a first collar for fitting onto the cable connected to the male connector, and the other end of the connecting part has a second collar for connecting onto the protective cover; the first collar has a circular first inner hole, and an auxiliary hole is formed on the wall of the first inner hole, which extends axially along the first inner hole to facilitate the cable to pass into the first inner hole.

8. The male connector as described in claim 7, characterized in that: The protective cover has a connecting groove and a recessed surface on both sides for screwing into the plug body. The connecting groove is provided with a first sealing gasket for sealing the slot when the protective cover is screwed onto the plug body. The second collar is connected to the dust cover by a screw.

9. A female connector, characterized in that: The device includes a socket body, a second terminal inserted into the socket body, a second connecting tube connected to one end of the socket body with the same structure as the first connecting tube of the male connector as claimed in any one of claims 1 to 8, and a connecting sleeve connected to the other end of the socket body. The plug body has a mating portion for insertion into a mating slot of the male connector as claimed in any one of claims 1 to 8, and the connecting sleeve is spaced around the mating portion.

10. A pluggable cable connector, characterized in that: Includes the male connector as described in any one of claims 1 to 8 and the female connector as described in claim 9 for mating with the male connector.

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