Waterproof radio frequency connector and method of assembling the same

Abstract

The application discloses a waterproof radio frequency connector and an assembling method thereof. The waterproof radio frequency connector comprises an outer conductor, a front end of which is provided with a socket part, and a sealing ring is arranged on the periphery of the socket part; an inner insulator is arranged in the outer conductor; a center conductor is arranged in the inner insulator; a cable is stripped at the end to expose the conductor, and the rear end of the center conductor is electrically connected with the conductor of the cable; and the cable extends out of the outer conductor; a primary sleeve is sleeved between the outer conductor and the cable and is fixed by riveting; and a heat-shrinkable tape and glue double-wall pipe is wrapped between the outer conductor and the cable and forms a sealed connection, and the heat-shrinkable tape and glue double-wall pipe also wraps the primary sleeve. The socket part is inserted into a counter-plug hole of a counter-plug end, the sealing ring is tightly attached to the inner wall of the counter-plug hole, the socket part and the counter-plug hole form a counter-plug sealing, the manufacturing cost is low, the waterproof effect is good, and the insulating seat has sufficient space outside the same to set a lock catch, so that the conductor assembly is prevented from being pulled off.

Description

Technical fields:

[0001] This invention relates to the field of connector product technology, and specifically to a waterproof radio frequency connector and its assembly method. Background technology:

[0002] In the current fields of electronic communications and new energy vehicle technology, such as communication transmission, voice transmission, data transmission, and image transmission, the required signal propagation speed is increasing, the frequency is rising, and the degree of systematization and integration is also increasing. RF connectors, due to their small size, light weight, good shock resistance, wide operating bandwidth, and tolerance for certain axial and radial misalignment, are widely used in integrated modular applications. RF connectors can be used for interconnection between circuit boards, RF modules, and circuit boards and RF modules. In the electronic communications and new energy vehicle industries, miniaturization and cost reduction are particularly important for market considerations, leading to increasingly higher levels of modularity in electronic communication products.

[0003] See Figure 1 This is a prior art radio frequency connector, which generally includes a housing 101, an outer conductor 102 passing through the housing 101, an inner insulator 103 disposed inside the outer conductor 102, and a center conductor 104 passing through the inner insulator 103. The center conductor 104 is coaxially arranged with the outer conductor 102, and the center conductor 104 is also connected to a coaxial cable 107, which extends out of the housing 101. A protruding ring 105 is formed inside the housing 101 and is placed in a socket 106. A groove is formed on the outside of the housing 101 corresponding to the position of the protruding ring 105, and the protruding ring 105 is also sleeved on the outer periphery of the front end of the outer conductor 102 to form a mating part for insertion with the mating end. To improve waterproof performance, the RF connector has a sealing ring 108 formed by injection molding around the front end of the convex ring 105. The sealing ring 108 makes a sealing contact with the mating end to achieve waterproofing. In addition, a sealing plug 109 is sleeved on the outside of the coaxial cable 107. The sealing plug 109 is inserted into the rear end of the housing 101, and a back cover 100 is installed at the rear end of the outer conductor 102. The back cover 100 confines the sealing plug 109 in the housing 101, thereby achieving a seal between the coaxial cable 107 and the housing 101 to achieve waterproofing.

[0004] However, the aforementioned RF connector has a convex ring 105 formed on the housing 101, and a sealing ring 108 is formed around the convex ring 105 by injection molding to serve as a waterproof structure. This waterproof structure is costly to manufacture, and the housing 101 has a groove on the outside corresponding to the convex ring 105, so there is not enough space on the outside of the housing 101 to make a locking mechanism. This results in a risk of pull-out of the conductor assembly consisting of the center conductor 104, inner insulator 103, and outer conductor 102 inside the housing 101 after the mating ends are inserted, making it impossible to guarantee the stability of the mating end's conduction in real time. In addition, the sealing plug 109 is inserted into the rear end of the housing 101 and secured with a rear cover 100 to achieve a seal between the coaxial cable 107 and the housing 101. This structure is complex and the sealing effect is not ideal. Furthermore, the sealing plug 109 is at risk of falling out during use, which would lead to the failure of the waterproof performance.

[0005] In view of the above, the inventors propose the following technical solution. Summary of the Invention:

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a waterproof radio frequency connector and its assembly method.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following first technical solution: The waterproof RF connector includes: an outer conductor with a socket at its front end for mating with a mating end, the socket being surrounded by a sealing ring; an inner insulator passing through the outer conductor; a center conductor passing through the inner insulator; the front end of the inner insulator covering the front end of the center conductor and extending into the inner cavity of the socket; a cable with its end stripped to expose the conductor, and electrically connecting the rear end of the center conductor to the conductor of the cable; the cable extending outside the outer conductor; a primary sleeve fitted between the outer conductor and the cable and riveted to fix them, thus fixing the outer conductor and the cable together; a heat-shrinkable adhesive double-walled tube fitted between the outer conductor and the cable to form a sealed connection, and the heat-shrinkable adhesive double-walled tube also wrapping the primary sleeve; after the socket is inserted into the mating end's mating hole, the sealing ring fits tightly against the inner wall of the mating hole, thus forming a mating seal between the socket and the mating hole.

[0008] Furthermore, in the above technical solution, at least one outwardly protruding retaining ring is formed on the outer surface of the sealing ring, and the retaining ring is deformed by the inner wall of the insertion hole to form a sealing contact; a groove is provided on the outside of the insertion part; the sealing ring is assembled in the groove by sleeve; or, the sealing ring is integrally fixed in the groove by in-mold injection molding.

[0009] Furthermore, in the above technical solution, the front end of the heat-shrinkable double-walled tube is sleeved on the rear end of the outer conductor and fixed by heating and shrinking, and the inner wall of the front end of the heat-shrinkable double-walled tube is bonded to the outer wall of the rear end of the outer conductor to form a seal; the rear end of the heat-shrinkable double-walled tube is sleeved on the periphery of the cable and fixed by heating and shrinking, and the inner wall of the rear end of the heat-shrinkable double-walled tube is bonded to the periphery of the cable to form a seal.

[0010] Furthermore, in the above technical solution, the shielding metal braided mesh of the cable is sleeved around the rear end of the outer conductor; the primary sleeve simultaneously presses the outer conductor, the cable, and the outer shielding metal braided mesh, and presses the shielding metal braided mesh firmly around the rear end of the outer conductor; the outer conductor is provided with several annular grooves, and the inner wall of the heat-shrinkable adhesive double-wall tube is also formed with annular protrusions that fit into the annular grooves and are sealed in contact by adhesive.

[0011] Furthermore, in the above technical solution, the outer conductor passes through the insulating base, and a first annular slot is formed between the outer periphery of the socket and the inner wall of the insulating base; a second annular slot is formed between the inner wall of the socket and the front end of the inner insulator, and the spring ring provided on the inner wall of the socket is exposed in the second annular slot; a mating interface size X' is formed between the bottom surface of the first annular slot and the bottom surface of the second annular slot; when the outer surface of the sealing ring has two outwardly protruding retaining rings, the mating interface size X of the mating end is smaller than the mating interface size X', and the waterproof RF connector is mated with the mating end. Afterwards, a gap C is formed between the front end of the outer conductor in the mating end and the bottom surface of the second annular slot; when the outer surface of the sealing ring protrudes outwards with 3 retaining rings, the width of the sealing ring increases, and is limited by the spring ring set on the inner wall of the socket, resulting in the socket being insufficient to widen the width of the groove that accommodates the sealing ring. Therefore, the spring ring is translated towards the port of the socket or the axial dimension of the spring ring is shortened, and a hole D is drilled inwards at the bottom of the second annular slot to make up for the space of the spring ring translation, ensuring that the size of the mating interface dimension X' is greater than or equal to the size of the mating interface dimension X of the mating end.

[0012] Furthermore, in the above technical solution, the outer conductor is provided with a first convex ring and a second convex ring distributed at intervals; the inner wall of the insulating seat is provided with a first stepped groove along its rear end; the front end face of the second convex ring abuts against the inner wall of the first stepped groove; a locking spring is formed inside the insulating seat, and the end of the locking spring abuts against the rear end face of the first convex ring.

[0013] Furthermore, in the above technical solution, a locking seat is also provided on the outer wall of the insulating seat. The front end of the locking seat is engaged with the rear side of the first convex ring to block the first convex ring. The insulating seat is provided with an insertion port that penetrates its inner cavity. The insertion port is provided with a first initial slot and a second locking slot that are spaced apart. The locking seat is formed with a locking claw that is adapted to the first initial slot and the second locking slot. The locking claw engages in the first initial slot or the second locking slot.

[0014] Furthermore, in the above technical solution, a secondary sleeve is fixed around the part of the heat-shrinkable double-walled tube that contacts the cable at the rear end, so as to fasten the heat-shrinkable double-walled tube and the cable together.

[0015] Furthermore, in the above technical solution, the outer conductor is bent, and an opening is provided at the corner of the outer conductor. A rear plug is also embedded and fixed in the opening, and a waterproof ring is provided around the rear plug. The outer edge of the waterproof ring contacts the inner wall of the opening to form a sealed assembly.

[0016] To solve the above-mentioned technical problems, the present invention adopts the following second technical solution: The assembly method of the waterproof RF connector is as follows: a sealing ring is set around the socket at the front end of the outer conductor; the cable end is stripped to expose the conductor; and the rear end of the center conductor is riveted to the conductor of the cable; then the center conductor is inserted into the inner insulator set in the inner hole of the outer conductor, while the outer shielding metal braided mesh of the cable is wrapped around the rear end of the outer conductor; then a primary sleeve is inserted, which simultaneously presses the outer conductor, the cable, and the outer shielding metal braided mesh; then a heat-shrinkable adhesive double-walled tube is inserted, which is fitted around the rear end of the outer conductor and the outer perimeter of the cable, and the heat-shrinkable adhesive double-walled tube is tightened together with the outer conductor and the cable by heating to form a sealed contact, thereby forming a conductor assembly; finally, the conductor assembly is inserted into the insulating base; the locking spring in the insulating base locks the outer conductor once, and the locking seat in the insulating base locks the outer conductor a second time, thereby forming a waterproof RF connector.

[0017] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: Since the sealing ring in the present invention is directly set on the periphery of the outer conductor's socket as a waterproof structure at the front end of the outer conductor, the manufacturing cost of this waterproof structure is relatively low. Furthermore, after the socket is inserted into the mating end's mating hole, the sealing ring fits tightly against the inner wall of the mating hole, forming a mating seal between the socket and the mating end, resulting in a good sealing effect. Moreover, the sealing ring is not associated with the insulating base, allowing sufficient space on the outside of the insulating base to install a locking buckle. This buckle locks the insulating base to the mating end, ensuring a stable connection between the conductor assembly inside the insulating base and the conductor structure inside the mating end, greatly reducing the risk of conductor assembly pull-out and ensuring the stability of the mating connection between the present invention and the mating end. In addition, the heat-shrinkable adhesive double-walled tube is wrapped between the outer conductor and the cable, forming a sealed connection, thus serving as a waterproof structure at the rear end of the outer conductor. Compared with the prior art's method of using a sealing plug, its assembly structure is simpler and more stable, achieving a complete seal and precise waterproofing with an extremely ideal waterproofing effect. Attached image description:

[0018] Figure 1 This is a cross-sectional view of an existing radio frequency connector;

[0019] Figure 2 This is a perspective view of Embodiment 1 of the present invention without an insulating base;

[0020] Figure 3 This is a front view of Embodiment 1 of the present invention;

[0021] Figure 4 This is an exploded perspective view of Embodiment 1 of the present invention;

[0022] Figure 5 This is a cross-sectional view from another perspective of Embodiment 1 of the present invention;

[0023] Figure 6 This is an assembly state diagram of the lock seat in Embodiment 1 of the present invention;

[0024] Figure 7 This is a cross-sectional view of the first embodiment of the present invention without the insulating base;

[0025] Figure 8 This is a cross-sectional view of the mating end adapted to this invention;

[0026] Figure 9 This is a cross-sectional view of Embodiment 1 of the present invention (the sealing ring has two retaining rings);

[0027] Figure 10 This is a cross-sectional view of Embodiment 1 of the present invention (the sealing ring has 3 retaining rings);

[0028] Figure 11This is an assembly diagram of the mating end of Embodiment 1 of the present invention (the sealing ring has 2 retaining rings);

[0029] Figure 12 This is an assembly diagram of the mating end of Embodiment 1 of the present invention (the sealing ring has 3 retaining rings);

[0030] Figure 13 This is an assembly diagram of the first embodiment of the present invention with the addition of a secondary sleeve;

[0031] Figure 14 This is a structural diagram of Embodiment 2 of the present invention. Detailed implementation method:

[0032] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0033] Example 1:

[0034] See Figure 2-13 The diagram shows a waterproof radio frequency connector, comprising: an outer conductor 1, an inner insulator 2, a center conductor 3, a cable 4, a heat-shrinkable adhesive double-walled tube 5, and an insulating base 6. The inner insulator 2 passes through the outer conductor 1; the center conductor 3 passes through the inner insulator 2, making the outer conductor 1, inner insulator 2, and center conductor 3 coaxially arranged. The outer conductor 1, inner insulator 2, center conductor 3, cable 4, and heat-shrinkable adhesive double-walled tube 5 form a conductor assembly, which passes through the insulating base 6. The rear end of the center conductor 3 is electrically connected to the cable 4, which extends beyond the outer conductor 1. The heat-shrinkable adhesive double-walled tube 5 encases the outer conductor 1 and the cable 4, and the cable 4 also extends beyond the insulating base 6.

[0035] Both the outer conductor 1 and the center conductor 3 are metallic conductors.

[0036] Combination Figure 7-12As shown, the outer conductor 1 has a socket 11 at its front end for insertion into the mating end 9; the front end of the inner insulator 2 covers the front end of the center conductor 3 and extends into the inner cavity of the socket 11; a sealing ring 12 is provided around the socket 11. After the socket 11 is inserted into the mating hole 91 of the mating end 9, the sealing ring 12 fits tightly against the inner wall of the mating hole 91, so that the socket 11 and the mating hole 91 of the mating end 9 form a mating seal. Since the sealing ring 12 in this invention is directly set on the periphery of the socket portion 11 of the outer conductor 1 as a waterproof structure at the front end of the outer conductor 1, the manufacturing cost of this waterproof structure is relatively low. After the socket portion 11 is inserted into the mating hole 91 of the mating end 9, the sealing ring 12 fits tightly with the inner wall of the mating hole 91 to form a mating seal with good sealing effect. Furthermore, the sealing ring 12 is not related to the insulating base 6, so that the insulating base 6 has enough space on its outside to set the latch 60, and locks it with the mating end 9 through the latch 60, ensuring that the conductor assembly in the insulating base 6 and the conductor structure in the mating end 9 form a stable connection, greatly reducing the risk of the conductor assembly being pulled out, and ensuring the stability of the mating connection between the present invention and the mating end.

[0037] As shown in Figures 9-12, a second annular slot 21 is formed between the inner wall of the socket portion 11 and the front end of the inner insulator 2; the inner wall of the socket portion 11 is also provided with an annular groove 112, in which a spring coil 113 is provided. The spring coil 113 is exposed in the second annular slot 21 and is used to contact the outer wall of the outer conductor 92 of the mating end 9 to form a stable conduction. The outer conductor 1 passes through the insulating base 6, and a first annular slot 61 is formed between the outer periphery of the insertion portion 11 and the inner wall of the insulating base 6. When the present invention is inserted into the mating end 9, the insertion portion 11 is inserted into the mating hole 91 formed between the outer conductor 92 and the plastic shell 93 in the mating end 9, and the front end of the plastic shell 93 is inserted into the first annular slot 61, the front end of the outer conductor 92 is inserted into the second annular slot 21, and contacts the spring coil 113 to form an electrical connection. At the same time, the central conductor 3 is inserted into the central guide pin 94 in the mating end 9 and forms an electrical connection, so that the present invention and the mating end 9 can form a stable communication. Since the sealing ring 12 is located on the periphery of the socket portion 11 in the outer conductor 1, after the present invention is inserted with the mating end 9, the front end of the plastic shell 93 with the mating hole 91 is directly fitted onto the outside of the sealing ring 12, thereby squeezing the sealing ring 12 and making the outer diameter of the sealing ring 12 spring-loaded into the inner wall of the mating hole 91. The pressure is transmitted through the spring-loaded fit of the outer diameter of the sealing ring 12, so that the inner hole of the sealing ring 12 is tightly fitted with the outer surface of the socket portion 11 in the outer conductor 1, thereby forming a mating seal between the socket portion 11 and the mating hole 91 of the mating end 9, and achieving a sealing assembly with an extremely ideal waterproof effect.

[0038] Combination Figure 8-12In the mating end 9, the front end face of the plastic shell 93 is surface A, and the front end face of the outer conductor 92 is surface B. The axial dimension between surface A and surface B is X, which is the mating interface dimension X. In this invention, the rear end face (i.e., the bottom face) of the first annular slot 61 is surface A', and the rear end face (i.e., the bottom face) of the second annular slot 21 is surface B'. The axial dimension between surface A' and surface B' is X', which is the mating interface dimension X'.

[0039] The assembly methods of the sealing ring 12 include at least the following two:

[0040] The first assembly method: A groove 111 is provided on the outside of the socket 11, and the sealing ring 12 is assembled in the groove 111 by means of sleeve; wherein, the width of the sealing ring 12 is the same as the width of the groove 111, so that the sealing ring 12 will not slip after being sleeved in the groove 111, thereby ensuring sealing performance and waterproof effect.

[0041] The second assembly method: A groove 111 is provided on the outside of the socket 11, and the sealing ring 12 is integrally fixed in the groove 111 by in-mold injection molding. The assembly structure is more stable, so that the sealing ring 12 is firmly assembled in the groove 111, thereby ensuring sealing performance and waterproof effect.

[0042] The outer surface of the sealing ring 12 is formed with at least one outwardly protruding retaining ring 121. The retaining ring 121 is squeezed and deformed by the inner wall of the insertion hole 91 to form a sealing contact to enhance the waterproof capability. The more retaining rings 121 there are, the higher the waterproof capability.

[0043] Specifically, when the outer surface of the sealing ring 12 has two outwardly protruding retaining rings 121, the mating interface size X of the mating end 9 is smaller than the mating interface size X'. Furthermore, after the present invention is mated with the mating end 9, the A' surface of the present invention makes mating contact with the A surface of the mating end 9. At this time, the B' surface and the B surface have corresponding positions and form a certain gap C, such as... Figure 11 As shown.

[0044] When the outer surface of the sealing ring 12 has three protruding retaining rings 121, the width of the sealing ring 12 is increased, which means the groove 111 for accommodating the sealing ring 12 must also be widened accordingly. However, because the socket portion 11 in the outer conductor 1 has a spring ring 113 inside, this limitation prevents the socket portion 11 from widening the groove 111 for accommodating the sealing ring 12. Therefore, the spring ring 113 is either shifted towards the opening, i.e., towards the port of the socket portion 11, or the axial dimension of the spring ring 113 is shortened (using a spring ring with a shorter axial dimension). Simultaneously, to ensure the size of the mating interface dimension X', a hole is drilled inward at the bottom of the second annular slot 21 to form a slot D, thereby compensating for the space occupied by the shifting spring ring 113 and ensuring that the size of the mating interface dimension X' is greater than or equal to the size of the mating interface dimension X of the mating end 9. Figure 12 As shown.

[0045] The following describes the specific assembly method of the heat-shrinkable adhesive double-walled tube 5:

[0046] The outer layer of the heat-shrinkable double-walled tube is made of high-quality, soft cross-linked polyolefin material, while the inner layer is made of hot melt adhesive. The outer layer material has advantages such as insulation, corrosion resistance, and wear resistance, while the inner layer has advantages such as low melting point, waterproofing, sealing, and high adhesion.

[0047] The heat-shrinkable adhesive double-walled tube 5 is wrapped between the outer conductor 1 and the cable 4 to form a sealed connection, thus serving as a waterproof structure at the rear end of the outer conductor 1. Compared with the existing technology that uses a sealing plug, its assembly structure is simpler and more stable, and it can achieve a complete seal, achieving precise waterproofing with an extremely ideal waterproofing effect.

[0048] Specifically, as shown in Figures 7 and 9-12, the front end of the heat-shrinkable adhesive double-walled tube 5 is fitted onto the rear end of the outer conductor 1 and fixed by heating and shrinking. The inner wall of the front end of the heat-shrinkable adhesive double-walled tube is adhered to the outer wall of the rear end of the outer conductor 1 to form a seal. Since the inner layer of the heat-shrinkable adhesive double-walled tube is hot melt adhesive, this hot melt adhesive can be adhered and fixed to the outer wall of the rear end of the outer conductor 1 after heating. This not only ensures the stability of the assembly structure but also provides a good sealing effect and improves waterproof performance. Similarly, the rear end of the heat-shrinkable adhesive double-walled tube 5 is fitted onto the periphery of the cable 4 and fixed by heating and shrinking. The inner wall of the rear end of the heat-shrinkable adhesive double-walled tube 5 is adhered to the periphery of the cable 4 to form a seal. Since the inner layer of the heat-shrinkable adhesive double-walled tube is hot melt adhesive, this hot melt adhesive can be adhered and fixed to the periphery of the cable 4 after heating. This not only ensures the stability of the assembly structure but also provides a good sealing effect and improves waterproof performance.

[0049] Combination Figure 5 , 7As shown, the conductor 40 at the center of the cable 4 is fixed to the rear end of the center conductor 3 by riveting. Alternatively, the conductor 40 and the rear end of the center conductor 3 can be fixed by welding. The insulating outer sheath of the cable 4 contacts the inner wall of the outer conductor 1. The shielding metal braided mesh 41 of the cable 4 is fitted around the rear end of the outer conductor 1 to achieve grounding. A primary sleeve 13 is also riveted between the outer conductor 1 and the cable 4. This primary sleeve 13 simultaneously presses the outer conductor 1, the cable 4, and the outer shielding metal braided mesh together, securing the outer conductor 1 and the cable 4 together, and pressing the shielding metal braided mesh 41 around the rear end of the outer conductor 1 to ensure the stability of the assembly structure. Furthermore, the heat-shrinkable adhesive double-walled tube 5 is fitted around the primary sleeve 13 to ensure a sealing effect and improve waterproof performance.

[0050] To improve the stability of the assembly between the outer conductor 1 and the heat-shrinkable double-walled tube 5, and to prevent the heat-shrinkable double-walled tube 5 from accidentally detaching from the outer conductor 1, the following design was implemented: [Combined with...] Figure 5 , 7 As shown, the outer conductor 1 is provided with several annular grooves 14 around its periphery. The inner wall of the heat-shrinkable double-walled tube 5 is also formed with annular protrusions 51 that fit into the annular grooves 14 and are sealed in contact by adhesive. That is, after the heat-shrinkable double-walled tube 5 is heated and shrunk, the inner wall of the heat-shrinkable double-walled tube 5 will fill the annular grooves 14, thus forming annular protrusions 51. The annular protrusions 51 are held and positioned by the annular grooves 14, which can effectively prevent the heat-shrinkable double-walled tube 5 from accidentally detaching from the outer conductor 1. In addition, the hot melt adhesive on the inner layer of the heat-shrinkable double-walled tube 5 will also stick and fix the annular protrusions 51 to the annular grooves 14, thereby further ensuring the stability of the assembly structure.

[0051] The following provides a further explanation of the assembly structure between the outer conductor 1 and the insulating base 6.

[0052] As shown in Figures 5, 9, and 10, the outer conductor 1 is provided with a first convex ring 15 and a second convex ring 16 spaced apart at the front and rear ends; the inner wall of the insulating base 6 is provided with a first stepped groove 62 along its rear end; the front end face of the second convex ring 16 abuts against the inner wall of the first stepped groove 62 to achieve front end limiting; a locking spring piece 63 is formed inside the insulating base 6, the end of which abuts against the rear end face of the first convex ring 15 to achieve rear end limiting and to achieve the purpose of locking at one time, thereby limiting the outer conductor 1 to the insulating base 6 and preventing the outer conductor 1 from accidentally detaching from the insulating base 6.

[0053] The outer diameter of the first convex ring 15 is smaller than the outer diameter of the second convex ring 16.

[0054] The groove 111 extends to the front end face of the first convex ring 15 on one side, and the rear end of the sealing ring 12 abuts against the front end face of the first convex ring 15. Specifically, the outer diameter of the sealing ring 12 is slightly smaller than the outer diameter of the first convex ring 15 in the outer conductor 1, so that both the sealing ring 12 and the first convex ring 15 in the outer conductor 1 can pass smoothly through the central mounting hole of the insulating seat.

[0055] To further limit the outer conductor 1 and ensure its stable installation in the insulating base 6, a locking seat 7 is also provided on the outer wall of the insulating base 6. Figure 6 As shown, the front end of the locking seat 7 is engaged with the rear side of the first protrusion ring 15 to block the first protrusion ring 15, thereby further confining the outer conductor 1 to the insulating seat 6 and achieving the purpose of secondary locking, which can more effectively prevent the outer conductor 1 from accidentally detaching from the insulating seat 6.

[0056] The inner side of the lock seat 7 is provided with an arc-shaped stop, which contacts the outer wall of the outer conductor 1 and blocks the first convex ring 15.

[0057] Specifically, combined Figure 4 , 6 As shown, the insulating base 6 is provided with an insertion port 64 penetrating its inner cavity. The insertion port 64 contains a first initial slot 641 and a second locking slot 642 spaced apart. The locking base 7 has locking claws 71 formed around its periphery that are adapted to the first initial slot 641 and the second locking slot 642. The locking claws 71 engage with either the first initial slot 641 or the second locking slot 642. When the locking claws 71 engage with the first initial slot 641, the locking base 7 is installed in the insertion port 64 but does not block the first protruding ring 15, thus achieving the purpose of pre-installation. After the outer conductor 1 is inserted into the insulating base 6, the locking base 7 is pressed in, causing the locking claws 71 to engage with the second locking slot 642, thus blocking the first protruding ring 15. This further confines the outer conductor 1 to the insulating base 6, achieving a secondary locking purpose and more effectively preventing the outer conductor 1 from accidentally detaching from the insulating base 6.

[0058] To enhance the waterproof performance of the cable 4 under bending conditions, a secondary sleeve 8 is fixed to the outer periphery of the portion of the heat-shrinkable double-walled tube 5 that contacts the cable 4 at its rear end. This secures the heat-shrinkable double-walled tube 5 to the cable 4, ensuring that no gaps form between the cable 4 and the heat-shrinkable double-walled tube 5 even after bending, thus maintaining a constant seal and guaranteeing waterproof performance. The secondary sleeve 8 can be a metal crimped sleeve or a secondary heat-shrinkable sleeve, both of which aim to prevent bending gaps at the root of the bend, as shown in Figure 13.

[0059] In the assembly of the conductor assembly of the present invention, a sealing ring 12 is provided around the socket 11 at the front end of the outer conductor 1, the end of the cable 4 is stripped to expose the conductor 40, and the rear end of the center conductor 3 is riveted to the conductor 40 at the center of the cable 4; the center conductor 3 is inserted into the inner insulator 2 provided in the inner hole of the outer conductor 1, and the outer shielding metal braided mesh of the cable 4 is wrapped around the rear end of the outer conductor 1; then a primary sleeve 13 is inserted, which simultaneously presses the outer conductor 1, the cable 4 and the outer shielding metal braided mesh; finally, a heat-shrinkable double-walled tube 5 is inserted, which is placed around the rear end of the outer conductor 1 and the outer periphery of the cable 4, and is tightened together with the outer conductor 1 and the cable 4 by heating to form a sealed contact, thereby forming a conductor assembly, so that it can be directly inserted into the insulating base 6 later.

[0060] Furthermore, the assembly method of the waterproof RF connector is as follows: a sealing ring 12 is set around the socket 11 at the front end of the outer conductor 1; the end of the cable 4 is stripped to expose the conductor 40; and the rear end of the center conductor 3 is riveted to the conductor 40 of the cable 4; then the center conductor 3 is inserted into the inner insulator 2 in the inner hole of the outer conductor 1, while the outer shielding metal braid of the cable 4 is wrapped around the rear end of the outer conductor 1; then a primary sleeve 13 is inserted, which simultaneously presses the outer conductor 1, the cable 4, and the outer shielding metal braid 41; then a heat-shrinkable double-walled tube 5 is inserted, which is placed around the rear end of the outer conductor 1 and the outer periphery of the cable 4, and is tightened together with the outer conductor 1 and the cable 4 by heating to form a sealed contact, thus forming a conductor assembly; finally, the conductor assembly is inserted into the insulating base 6; the locking spring 63 in the insulating base 6 locks the outer conductor 1 once, and the locking seat 7 in the insulating base 6 locks the outer conductor 1 a second time, thus forming a waterproof RF connector.

[0061] The waterproof RF connector described above is a straight connector, that is, the outer conductor 1 is cylindrical, and the cable 4 also extends horizontally and straight out of the outer conductor 1.

[0062] In summary, this invention can be applied to the field of new energy vehicles. Since the sealing ring 12 in this invention is directly set on the periphery of the socket 11 of the outer conductor 1 as a waterproof structure at the front end of the outer conductor 1, the manufacturing cost of this waterproof structure is relatively low. After the socket 11 is inserted into the mating hole 91 of the mating end 9, the sealing ring 12 fits tightly with the inner wall of the mating hole 91, so that the socket 11 and the mating hole 91 of the mating end 9 form a mating seal with good sealing effect. Moreover, the sealing ring 12 is not related to the insulating seat 6, so that the insulating seat 6 has enough space on its outside to set the latch 60, and locks it with the mating end 9 through the latch 60, ensuring that the conductor assembly in the insulating seat 6 and the conductor structure in the mating end 9 form a stable connection, greatly reducing the risk of the conductor assembly being pulled out, and ensuring the stability of the mating connection between the invention and the mating end. In addition, the heat-shrinkable double-walled tube 5 is wrapped between the outer conductor 1 and the cable 4 to form a sealed connection, thus serving as a waterproof structure at the rear end of the outer conductor 1. Compared with the existing technology that uses a sealing plug, its assembly structure is simpler and more stable, and it can achieve a complete seal, achieving precise waterproofing with an extremely ideal waterproofing effect.

[0063] Example 2:

[0064] Combination Figure 14 As shown, the waterproof RF connector in this second embodiment is a right-angle connector, which differs from the above embodiments in that:

[0065] In Embodiment 2, the outer conductor 1 is elbow-shaped, for example, it can be bent at 90°, allowing the cable 4 to be assembled at a 90° angle with the socket 11. An opening 10 is also provided at the corner of the outer conductor 1. This opening 10 facilitates the later insertion of the center conductor 3 and also facilitates the riveting of the rear end of the center conductor 3 to the center conductor of the cable 4. For waterproofing, a back plug 17 is embedded and fixed inside the opening 10, and a waterproof ring 18 is provided around the back plug 17. The outer edge of the waterproof ring 18 contacts the inner wall of the opening 10 to form a sealed assembly. Since the cable 4 does not extend through the back plug 17, the back plug 17 is not affected by the bending of the cable 4, ensuring that the back plug 17 is always sealed to the outer conductor 1, guaranteeing waterproof performance.

[0066] Apart from the above, the other structures of this embodiment two are the same as the other structures of the above embodiment one, and the functional effects are also the same, so they will not be described in detail here.

[0067] Of course, the above description is only a specific embodiment of the present invention and is not intended to limit the scope of the present invention. All equivalent changes or modifications made to the structure, features and principles described in the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A waterproof radio frequency connector, characterized by: It includes: The front end of the outer conductor (1) is provided with a socket part (11) for plugging with the opposite end (9), and the socket part (11) is provided with a sealing ring (12) on the periphery; The inner insulator (2) is provided in the outer conductor (1); The center conductor (3) is provided in the inner insulator (2); the front end of the inner insulator (2) covers the front end of the center conductor (3) and extends into the inner cavity of the socket part (11); The cable (4) is stripped at the end to expose the conductor (40), and the rear end of the center conductor (3) is electrically connected with the conductor (40) of the cable (4); and the cable (4) extends out of the outer conductor (1); The primary sleeve (13) is sleeved between the outer conductor (1) and the cable (4) and is riveted and fixed, so that the outer conductor (1) and the cable (4) are fixedly connected; The heat shrinkable tape adhesive double-wall pipe (5) is sleeved between the outer conductor (1) and the cable (4) and forms a sealed connection, and the heat shrinkable tape adhesive double-wall pipe (5) also wraps the primary sleeve (13); After the socket part (11) is inserted into the plug hole (91) of the opposite end (9), the sealing ring (12) tightly fits with the inner wall of the plug hole (91), so that the socket part (11) and the plug hole (91) form a plug-in sealing; The outer shielding metal braid (41) of the cable (4) is sleeved on the periphery of the rear end of the outer conductor (1); the primary sleeve (13) simultaneously presses the outer conductor (1) and the cable (4) and the outer shielding metal braid, and the outer shielding metal braid (41) is pressed and fixed on the periphery of the rear end of the outer conductor (1); the outer conductor (1) is provided with a plurality of annular grooves (14), and the inner wall of the heat shrinkable tape adhesive double-wall pipe (5) is also formed with an annular protrusion (51) which is clamped into the annular groove (14) and is in sealed contact by pasting; The outer conductor (1) is provided in the insulating seat (6), and a first annular insertion groove (61) is formed between the periphery of the socket part (11) and the inner wall of the insulating seat (6); a second annular insertion groove (21) is formed between the inner wall of the socket part (11) and the front end of the inner insulator (2), and a spring ring (113) provided on the inner wall of the socket part (11) is exposed in the second annular insertion groove (21); the bottom surface of the first annular insertion groove (61) and the bottom surface of the second annular insertion groove (21) form a plug-in interface size X'; When the two protruding rings (121) on the outer surface of the sealing ring (12) are two rings, the plug-in interface size X of the opposite end (9) is smaller than the plug-in interface size X', and after the waterproof radio frequency connector is plugged with the opposite end (9), a gap C is formed between the front end of the outer conductor (92) in the opposite end (9) and the bottom surface of the second annular insertion groove (21). When the three outwardly protruding retaining rings (121) on the outer surface of the sealing ring (12) are three rings, the width of the sealing ring (12) is increased and is limited by the spring ring (113) arranged on the inner wall of the spigot portion (11), which causes the spigot portion (11) to be insufficient to widen the width of the groove (111) for accommodating the sealing ring (12) externally, so the spring ring (113) is translated or the axial dimension of the spring ring is shortened in the direction of the port of the spigot portion (11), and a hole D is dug in the bottom of the second annular insertion groove (21) inwardly, so as to compensate for the space of the translation of the spring ring (113) and ensure that the size X' of the interface for plugging is greater than or equal to the size X of the interface for plugging of the mating end (9). The outer periphery of the part of the heat-shrinkable tape-glue double-wall pipe (5) in contact with the cable (4) is further fixed with a secondary sleeve (8) to fasten the heat-shrinkable tape-glue double-wall pipe (5) and the cable (4) together, so that after the cable (4) is bent, no gap is formed between the cable (4) and the heat-shrinkable tape-glue double-wall pipe (5), so as to ensure the sealing performance and waterproof ability at all times.

2. The waterproof RF connector of claim 1, wherein: The retaining ring (121) is extruded and deformed by the inner wall of the counter-plug hole (91) to form a sealing contact; the spigot portion (11) is externally provided with a groove (111); the sealing ring (12) is assembled in the groove (111) in a sleeved manner; or the sealing ring (12) is integrally fixed in the groove (111) by in-mold injection molding.

3. The waterproof RF connector of claim 1, wherein: The front end of the heat-shrinkable tape-glue double-wall pipe (5) is sleeved on the rear end of the outer conductor (1) and is fixed by heating and shrinking, and the inner wall of the front end of the heat-shrinkable tape-glue double-wall pipe (5) is pasted to the outer wall of the rear end of the outer conductor (1) to form a seal; the rear end of the heat-shrinkable tape-glue double-wall pipe (5) is sleeved on the outer periphery of the cable (4) and is fixed by heating and shrinking, and the inner wall of the rear end of the heat-shrinkable tape-glue double-wall pipe (5) is pasted to the outer periphery of the cable (4) to form a seal.

4. The waterproof radio frequency connector of claim 1, wherein: The outer periphery of the outer conductor (1) is provided with a first protruding ring (15) and a second protruding ring (16) distributed at intervals front and rear; a first stepped groove (62) is formed in the inner wall of the insulating seat (6) along the rear end thereof forward; the front end surface of the second protruding ring (16) abuts against the inner wall of the first stepped groove (62), and a lock spring (63) is formed in the inner wall of the insulating seat (6), and the end portion of the lock spring (63) abuts against the rear end surface of the first protruding ring (15).

5. The waterproof RF connector of claim 4, wherein: The outer wall of the insulating seat (6) is further provided with a lock seat (7), and the front end of the lock seat (7) is clamped on the rear side of the first protruding ring (15) to block the first protruding ring (15); wherein the insulating seat (6) is provided with a plug insertion port (64) penetrating through the inner cavity thereof, and the plug insertion port (64) is internally provided with first initial clamping grooves (641) and second locking clamping grooves (642) distributed at intervals; the outer periphery of the lock seat (7) is formed with locking claws (71) matched with the first initial clamping grooves (641) and the second locking clamping grooves (642), and the locking claws (71) are clamped into the first initial clamping grooves (641) or the second locking clamping grooves (642).

6. The waterproof RF connector according to any one of claims 1-3, wherein: The outer conductor (1) is in the shape of an elbow, and an opening (10) is arranged at the corner of the outer conductor (1), and a rear plug (17) is embedded and fixed in the opening (10), and a waterproof ring (18) is further arranged around the rear plug (17), and the waterproof ring (18) is in contact with the inner wall of the opening (10) to form a sealed assembly.

7. A method of assembling a water-resistant RF connector as claimed in any one of claims 1 to 3, wherein: The assembly method is as follows: a sealing ring (12) is arranged around the socket part (11) at the front end of the outer conductor (1), the cable (4) is stripped at the end to expose the conductor (40), and the rear end of the center conductor (3) is riveted and pressed onto the conductor (40) of the cable (4); then the center conductor (3) is arranged in the inner insulation (2) arranged in the inner hole of the outer conductor (1), and the outer shielding metal braid (41) of the cable (4) is wrapped around the rear end of the outer conductor (1); then a primary sleeve (13) is sleeved, which simultaneously presses the outer conductor (1), the cable (4) and the outer shielding metal braid (41); then a heat-shrinkable tape and glue double-wall pipe (5) is sleeved, which is sleeved around the rear end of the outer conductor (1) and the cable (4), and is tightly fixed with the outer conductor (1) and the cable (4) by heating, and forms a sealed contact to form a conductor assembly, and finally the conductor assembly is inserted into the insulating seat (6); the lock spring (63) in the insulating seat (6) locks the outer conductor (1) once, and the lock seat (7) in the insulating seat (6) locks the outer conductor (1) twice to form a waterproof radio frequency connector; The insulating seat (6) is provided with an insertion port (64) penetrating the inner cavity thereof, and the insertion port (64) is provided with first initial clamping grooves (641) and second locking clamping grooves (642) arranged at intervals; the lock seat (7) is formed with locking claws (71) matched with the first initial clamping grooves (641) and the second locking clamping grooves (642) around the lock seat (7), and the locking claws (71) are clamped into the first initial clamping grooves (641) or the second locking clamping grooves (642); when the locking claws (71) are clamped into the first initial clamping grooves (641), the lock seat (7) is installed in the insertion port (64), but does not block the first protruding ring (15) on the outer conductor (1), which achieves the purpose of preliminary installation, and after the outer conductor (1) is inserted into the insulating seat (6), the lock seat (7) is pressed in, so that the locking claws (71) are clamped into the second locking clamping grooves (642), and the lock seat (7) blocks the first protruding ring (15), so as to further limit the outer conductor (1) in the insulating seat (6), and achieve the purpose of secondary locking, which can more effectively prevent the outer conductor (1) from accidentally separating from the insulating seat (6); in order to enhance the waterproof performance of the cable (4) in the bent state, a secondary sleeve (8) is further fixed around the part of the heat-shrinkable tape and glue double-wall pipe (5) contacting the cable (4) at the rear end, so as to tightly fix the heat-shrinkable tape and glue double-wall pipe (5) with the cable (4), so that after the cable (4) is bent, no gap is formed between the cable (4) and the heat-shrinkable tape and glue double-wall pipe (5), so as to always ensure the sealing performance and waterproof ability.

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