Coaxial female end connector and assembling method

Abstract

The invention discloses a coaxial female end connector and an assembling method, and relates to the technical field of connectors, the coaxial female end connector comprises a shell assembly and a terminal assembly, one end of the terminal assembly can be inserted into the shell assembly and is detachably connected with the shell assembly; the terminal assembly comprises a shielding metal shell structure and a signal transmission structure, the shielding metal shell structure comprises a first shielding shell and a second shielding shell, the first shielding shell is internally provided with a first cavity penetrating through the two ends of the first shielding shell, and the second shielding shell is internally provided with a second cavity penetrating through the two ends of the second shielding shell; one end of the first shielding shell is inserted into the second cavity and is fixedly connected with the second shielding shell, and the first shielding shell and the second shielding shell are metal pieces formed by stamping; the signal transmission structure comprises an insulating core, a central conductor and a coaxial cable, and solves the problems of more signal abrupt changes and unstable signal transmission when the existing coaxial female end connector is used.

Description

Technical Field

[0001] The present invention relates to the technical field of connectors, and in particular to a coaxial female connector and an assembly method thereof. Background Art

[0002] With the rapid development of the automotive industry, the requirements for automobile technologies such as intelligence and autonomous driving are becoming increasingly stringent, and the requirements for data transmission and stability of high-speed automotive connectors are also becoming higher and higher. As an important component and solution in the field of automotive RF, coaxial female connectors play an important role in automotive navigation systems, car phones, audio equipment, electronic radars, cameras, etc.

[0003] In the existing coaxial female connector technology, the shielded metal shell structure is usually machined. Although it has high performance and stable signal transmission, its manufacturing cost is high. In order to reduce manufacturing costs, the existing technology mostly uses stamping technology to process the shielded metal shell structure. However, due to process reasons, the stamped shielded metal shell structure has many overall structural mutations, which will cause the signal to jump during the transmission process when used, and the transmission is unstable. In addition, the stamped shielded metal shell will form seams and gaps during the forming process, which will inevitably cause more signal leakage and interference.

[0004] Therefore, we are in urgent need of a coaxial female connector to solve the problems of frequent signal mutations and unstable signal transmission when the current coaxial female connector is in use. Summary of the invention

[0005] Based on this, in order to solve the above problems, the present invention proposes a coaxial female connector and an assembly method, which solves the problems of frequent signal mutations and unstable signal transmission when the current coaxial female connector is in use.

[0006] The technical solution of the present invention is: A coaxial female connector comprises a housing assembly and a terminal assembly, wherein one end of the terminal assembly can be inserted into the housing assembly and is detachably connected to the housing assembly; The terminal assembly includes a shielded metal shell structure and a signal transmission structure, the shielded metal shell structure includes a first shielding shell and a second shielding shell, the first shielding shell is provided with a first cavity penetrating through both ends of the first shielding shell, the second shielding shell is provided with a second cavity penetrating through both ends of the second shielding shell, one end of the first shielding shell is inserted into the second cavity and is fixedly connected to the second shielding shell, wherein the first shielding shell and the second shielding shell are stamped metal parts; The signal transmission structure includes an insulating core, a center conductor and a coaxial cable. The center conductor is inserted into the insulating core and is detachably connected to the insulating core. The center conductor and the insulating core are arranged in a first cavity and are detachably connected to a first shielding shell. One end of the coaxial cable passes through the second cavity and extends into the first cavity to be fixedly connected to one end of the center conductor.

[0007] Preferably, the first shielding shell includes an integrally formed first shell body and a connecting part, the second shielding shell includes an integrally formed second shell body and a U-shaped crimping wing, the first shell body is inserted into the second shell body and fixedly connected to the second shell body, the connecting part is located on the outside of the second shell body and is used to connect to the board-end connector, and one end of the coaxial cable is fixedly connected to the second shielding shell through the U-shaped crimping wing.

[0008] Preferably, the connecting portion and the first shell body have a first stamped seam, wherein at least one first dovetail connection structure is provided at the first stamped seam on the first shell body, the first dovetail connection structure includes a first dovetail groove and a first dovetail block, the first dovetail groove is matched with the first dovetail block, and the second shell body and the U-shaped crimping wing have a second stamped seam, wherein at least one second dovetail connection structure is provided at the second stamped seam on the second shell body, the second dovetail connection structure includes a second dovetail groove and a second dovetail block, the second dovetail groove is matched with the second dovetail block, and the first stamped seam and the second stamped seam are staggered.

[0009] Preferably, a plurality of fixed card points are provided on the inner side wall of the first shell body, and the plurality of fixed card points are located on the inner side wall of the first cavity. An annular stop groove cooperating with the plurality of fixed card points is provided on the insulating core. When the insulating core is inserted into the first cavity, the plurality of fixed card points are located in the annular stop groove and cooperate with the annular stop groove to form a limit.

[0010] Preferably, at least one pair of interference ribs is provided on the insulating core, and the at least one pair of interference ribs is cooperatively arranged on the insulating core and fixedly connected to the insulating core. When the insulating core is inserted into the first cavity, the at least one pair of interference ribs interferes with the inner wall of the first cavity.

[0011] Preferably, the shell assembly includes a plastic shell body and a secondary lock. The plastic shell body is provided with an installation cavity that runs through both ends of the plastic shell body. The terminal assembly can be plugged into the installation cavity and is detachably connected to the plastic shell body. The plastic shell body is provided with an installation slot. A positioning window is provided in the installation slot. The positioning window is connected to the installation cavity. A primary lock spring arm is provided at the positioning window. One end of the primary lock spring arm is fixedly connected to the plastic shell body. Pre-locking hanging platforms and final locking hanging platforms are provided on both sides of the installation slot. The secondary lock is arranged at the installation slot. Locking windows are provided on both sides of the secondary lock. The locking windows are arranged in cooperation with the pre-locking hanging platforms and the final locking hanging platforms. The secondary lock can be detachably connected to the pre-locking hanging platforms and the final locking hanging platforms through the locking window. A retaining wall is provided on one side of the bottom of the secondary lock, and one end of the retaining wall can be inserted into the installation cavity through the positioning window.

[0012] Preferably, the second shell body is provided with a primary locking rib and a secondary locking rib which are arranged in sequence, and a locking groove is provided between the primary locking rib and the secondary locking rib. The primary locking rib can contact and cooperate with the primary locking spring arm to form a limit, and the end of the retaining wall can be inserted into the locking groove and cooperate with the locking groove to form a limit.

[0013] Preferably, a shell stop rib is provided on the second shell body, and the shell stop rib is located at one end of the second shell body close to the U-shaped crimping wing. A shell guide surface and a shell stop surface which are arranged in coordination with the shell stop rib are provided on the inner wall of the installation cavity. The shell stop rib can contact and cooperate with the shell stop surface to form a limit.

[0014] Preferably, a support rib is provided on one side of the retaining wall, and the support rib is fixedly connected to the retaining wall and the secondary lock.

[0015] A coaxial female connector assembly method, applied to the coaxial female connector described above, comprises the following steps: Step S1: assembling terminal components; Step S11: assembling a shielding metal shell structure; Step S12: assembling a signal transmission structure; Step S13: Assembling the assembled signal transmission structure with the assembled shielding metal housing structure to complete the assembly of the terminal assembly; Step S2: Assemble the assembled terminal assembly with the housing assembly to complete the assembly of the coaxial female connector.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention realizes the functions of signal transmission, shielding and mechanical anti-retraction of the shielded metal shell structure by setting the shielded metal shell structure in the coaxial female connector as a first shielding shell and a second shielding shell, using the first shielding shell for signal transmission and shielding, and using the second shielding shell for stopping. At the same time, by setting one end of the first shielding shell in the second shielding shell, the signal transmission structure is installed in the first cavity and the second cavity, so that the signal transmission path does not need to pass through the second shielding shell, but only needs to pass through the first shielding shell, which effectively reduces signal interference and mutation, and improves the stability of signal transmission. The problem of many signal mutations and unstable signal transmission when the current coaxial female connector is in use is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of an exploded structure of a coaxial female connector described in an embodiment of the present invention; Figure 2 is a schematic cross-sectional structure diagram of the shielding metal shell structure described in an embodiment of the present invention; Figure 3 is a schematic diagram of an exploded structure of a signal transmission structure described in an embodiment of the present invention; Figure 4 is a schematic diagram of the exploded structure of the shielding metal shell structure described in an embodiment of the present invention; Figure 5 is a schematic structural diagram of a first shielding shell described in an embodiment of the present invention; Figure 6 is a schematic structural diagram of a second shielding shell described in an embodiment of the present invention; Figure 7 is a schematic structural diagram of the insulating core described in an embodiment of the present invention; Figure 8 is a schematic diagram of an exploded structure of a housing assembly described in an embodiment of the present invention; Fig. 9 The structure of the plastic shell body described in the embodiment of the present invention is schematically shown in FIG. Figure 1 ; Fig.10 The structure of the plastic shell body described in the embodiment of the present invention is schematically shown in FIG. Figure 2 ; Fig.11 The structure of the plastic shell body described in the embodiment of the present invention is schematically shown in FIG. Figure 3 ; Fig.12 is a schematic structural diagram of a central conductor described in an embodiment of the present invention; Fig.13 is a schematic diagram of an enlarged cross-section structure of a central conductor described in an embodiment of the present invention; Fig.14is a schematic structural diagram of a coaxial cable according to an embodiment of the present invention; Fig.15 is a schematic diagram of a partial structure of a coaxial cable described in an embodiment of the present invention; Fig.16 is a schematic diagram of a partial cross-sectional structure of a coaxial cable described in an embodiment of the present invention; Description of reference numerals: 10-shell assembly, 100-molded shell body, 101-secondary lock, 102-installation cavity, 103-installation slot, 104-positioning window, 105-primary lock spring arm, 106-pre-locking hanging platform, 107-final locking hanging platform, 108-locking window, 109-retaining wall, 110-shell guide surface, 111-shell stop surface, 112-support rib, 113-lever elastic lock body, 114-elastic lock protection bridge, 115-elastic lock protection wall, 116-plate end buckle release port , 117-elastic lock reinforcement rib, 118-elastic lock unlocking area, 119-elastic lock fulcrum, 120-plug auxiliary support wall, 20-terminal assembly, 200-shielded metal shell structure, 201-signal transmission structure, 202-first shielding shell, 203-second shielding shell, 204-first cavity, 205-second cavity, 206-insulating core, 207-center conductor, 208-coaxial cable, 209-first shell body, 210-connecting part, 211-second shell body , 212-U-shaped crimping wing, 213-first stamping seam, 214-first dovetail connection structure, 215-second stamping seam, 216-second dovetail connection structure, 217-fixed card point, 218-annular stop groove, 219-interference rib, 220-first locking rib, 221-secondary locking rib, 222-locking groove, 223-shell stop rib, 224-welding point, 225-installation window, 226-contact spring, 227-contact contact, 228-anti-retraction thorn, 2 29-stop skylight, 230-spring part, 231-conductor body, 232-cable crimping wing, 233-arc-shaped spring, 234-arc-shaped part, 235-guide part, 236-flanged stop block, 237-conductor stop surface, 238-spring avoidance hole, 239-cable copper core, 240-cable insulation layer, 241-cable shielding aluminum foil layer, 242-cable shielding copper wire layer, 243-cable insulation outer jacket, 244-crimping ring, 245-triangular crimping wing, 246-triangular crimping groove. DETAILED DESCRIPTION

[0018] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0019] Example: like Figures 1 to 3As shown, this embodiment discloses a coaxial female connector, including a housing assembly 10 and a terminal assembly 20, one end of the terminal assembly 20 can be inserted into the housing assembly 10, and is detachably connected to the housing assembly 10; The terminal assembly 20 includes a shielding metal shell structure 200 and a signal transmission structure 201. The shielding metal shell structure 200 includes a first shielding shell 202 and a second shielding shell 203. The first shielding shell 202 is provided with a first cavity 204 that passes through both ends of the first shielding shell 202. The second shielding shell 203 is provided with a second cavity 205 that passes through both ends of the second shielding shell 203. One end of the first shielding shell 202 is inserted into the second cavity 205 and is fixedly connected to the second shielding shell 203. The first shielding shell 202 and the second shielding shell 203 are stamped metal parts. The signal transmission structure 201 includes an insulating core 206, a center conductor 207 and a coaxial cable 208. The center conductor 207 is inserted into the insulating core 206 and is detachably connected to the insulating core 206. The center conductor 207 and the insulating core 206 are arranged in the first cavity 204 and are detachably connected to the first shielding shell 202. One end of the coaxial cable 208 passes through the second cavity 205 and extends into the first cavity 204 to be fixedly connected to one end of the center conductor 207.

[0020] The present invention realizes the functions of signal transmission, shielding and mechanical anti-retraction of the shielded metal shell structure 200 by setting the shielded metal shell structure 200 in the coaxial female connector as the first shielding shell 202 and the second shielding shell 203, using the first shielding shell 202 for signal transmission and shielding, and using the second shielding shell 203 for stopping. At the same time, by setting one end of the first shielding shell 202 in the second shielding shell 203, the signal transmission structure 201 is installed in the first cavity 204 and the second cavity 205, so that the signal transmission path does not need to pass through the second shielding shell 203, but only needs to pass through the first shielding shell 202, which effectively reduces the interference and mutation of the signal and improves the stability of the signal transmission. The problem of many signal mutations and unstable signal transmission when the current coaxial female connector is in use is solved.

[0021] like Figure 4As shown, in order to connect the coaxial female connector described in the present invention with the board-end connector and facilitate the assembly of the coaxial female connector described in the present invention, this embodiment is improved on the basis of the above embodiment, and the difference from the above embodiment is that the first shielding shell 202 includes an integrally formed first shell body 209 and a connecting portion 210, the second shielding shell 203 includes an integrally formed second shell body 211 and a U-shaped crimping wing 212, the first shell body 209 is inserted into the second shell body 211 and fixedly connected to the second shell body 211, the connecting portion 210 is located on the outside of the second shell body 211, and is used to connect to the board-end connector, and one end of the coaxial cable 208 is fixedly connected to the second shielding shell 203 through the U-shaped crimping wing 212.

[0022] The first shielding shell 202 is configured as an integrally formed first shell body 209 and a connecting portion 210, and the second shielding shell 203 is configured as an integrally formed second shell body 211 and a U-shaped crimping wing 212. During assembly, one end of the first shell body 209 is inserted into the second shell body 211, and then the first shell body 209 and the second shell body 211 are fixed to complete the assembly of the shielding metal shell structure 200. At the same time, the configuration of the connecting portion 210 can facilitate connection with the board-end connector, and the configuration of the U-shaped crimping wing 212 can facilitate crimping and fixing the coaxial cable 208.

[0023] like Figure 6 As shown, in one preferred embodiment, a plurality of welding points 224 are provided on the second shell body 211, and the first shell body 209 and the second shell body 211 are fixedly connected by welding.

[0024] The overall stability of the shielding metal shell structure 200 can be greatly improved by connecting in a welding manner.

[0025] like Figure 5 As shown, in one of the preferred embodiments, a plurality of installation windows 225 are provided on the connecting portion 210, each installation window 225 is provided with a contact spring 226, a contact point 227 is provided between two adjacent installation windows 225, and the contact point 227 is arranged on the inner side wall of the connecting portion 210 and is located on the inner side wall of the first cavity 204.

[0026] When in use, the arrangement of the contact spring 226 and the contact point 227 can facilitate a more stable connection between the connecting portion 210 and the board-end connector.

[0027] In one embodiment, as further preferred, the number of the mounting window 225 , the number of the contact spring 226 , and the number of the contact points 227 are all four.

[0028] like Figures 5 and 6As shown, in order to facilitate enhancing the overall structural strength of the first shielding shell 202 and the second shielding shell 203, this embodiment is modified on the basis of the above embodiment, and the difference from the above embodiment is that a first stamping seam 213 is provided on the connecting portion 210 and the first shell body 209, wherein at least one first dovetail connection structure 214 is provided at the first stamping seam 213 on the first shell body 209, and the first dovetail connection structure 214 includes a first dovetail groove and a first dovetail block, and the first dovetail groove is matched with the first dovetail block, and a second stamping seam 215 is provided on the second shell body 211 and the U-shaped crimping wing 212, wherein at least one second dovetail connection structure 216 is provided at the second stamping seam 215 on the second shell body 211, and the second dovetail connection structure 216 includes a second dovetail groove and a second dovetail block, and the second dovetail groove is matched with the second dovetail block, and the first stamping seam 213 and the second stamping seam 215 are staggered.

[0029] When in use, the provision of at least one first dovetail connection structure 214 can effectively enhance the overall structural strength of the first shielding shell 202 , and the provision of at least one second dovetail connection structure 216 can effectively enhance the overall structural strength of the second shielding shell 203 .

[0030] In one embodiment, as further preferred, the number of the first dovetail connection structures 214 is two, and the number of the second dovetail connection structures 216 is also two.

[0031] The first stamping seam 213 and the second stamping seam 215 are staggered in that when the first shielding shell 202 and the second shielding shell 203 are assembled, the first stamping seam 213 and the second stamping seam 215 need to be staggered so that the signal transmission structure 201 can be completely wrapped to enhance the shielding effect and anti-interference ability.

[0032] like Figure 2 , Figure 7 As shown, in order to facilitate the stable connection between the signal transmission structure 201 and the shielding metal shell structure 200, a plurality of fixed card points 217 are provided on the inner wall of the first shell body 209, and the plurality of fixed card points 217 are located on the inner wall of the first cavity 204. An annular stop groove 218 is provided on the insulating core 206 to cooperate with the plurality of fixed card points 217. When the insulating core 206 is inserted into the first cavity 204, the plurality of fixed card points 217 are located in the annular stop groove 218 and cooperate with the annular stop groove 218 to form a limit.

[0033] The provision of a plurality of fixed points 217 and annular stop grooves 218 can effectively achieve a stable connection between the signal transmission structure 201 and the shielding metal shell structure 200, while providing anti-retraction and stop functions.

[0034] like Figure 7 As shown, in order to further improve the stability of the connection between the signal transmission structure 201 and the shielding metal shell structure 200, it is further preferred that at least one pair of interference ribs 219 is provided on the insulating core 206, and the at least one pair of interference ribs 219 is cooperatively arranged on the insulating core 206 and fixedly connected to the insulating core 206. When the insulating core 206 is inserted into the first cavity 204, the at least one pair of interference ribs 219 forms interference with the inner wall of the first cavity 204.

[0035] The provision of the interference ribs 219 can effectively improve the stability of the connection between the signal transmission structure 201 and the shielding metal shell structure 200 .

[0036] like Figures 8 to 9 As shown, in order to facilitate the assembly of the housing assembly 10 and the terminal assembly 20, this embodiment is improved on the basis of the above embodiment. The difference from the above embodiment is that the housing assembly 10 includes a plastic shell body 100 and a secondary lock 101. The plastic shell body 100 is provided with an installation cavity 102 that runs through both ends of the plastic shell body 100. The terminal assembly 20 can be plugged into the installation cavity 102 and is detachably connected to the plastic shell body 100. The plastic shell body 100 is provided with an installation notch 103, and a positioning window 104 is provided in the installation notch 103. The positioning window 104 is connected to the installation cavity 102, and a positioning window 104 is provided at the positioning window 104. There is a primary locking spring arm 105, one end of which is fixedly connected to the plastic shell body 100, pre-locking hanging platforms 106 and final locking hanging platforms 107 are provided on both sides of the installation slot 103, and the secondary lock 101 is arranged at the installation slot 103, and locking windows 108 are provided on both sides of the secondary lock 101, and the locking windows 108 are coordinated with the pre-locking hanging platform 106 and the final locking hanging platform 107. The secondary lock 101 can be detachably connected to the pre-locking hanging platform 106 and the final locking hanging platform 107 through the locking window 108, and a retaining wall 109 is provided on one side of the bottom of the secondary lock 101, and one end of the retaining wall 109 can be inserted into the installation cavity 102 through the positioning window 104.

[0037] like Figure 6 , Fig.10 As shown, a primary locking rib 220 and a secondary locking rib 221 are provided in sequence on the second shell body 211, and a locking groove 222 is provided between the primary locking rib 220 and the secondary locking rib 221. The primary locking rib 220 can contact and cooperate with the primary locking spring arm 105 to form a limit, and the end of the retaining wall 109 can be inserted into the locking groove 222 and cooperate with the locking groove 222 to form a limit.

[0038] The second shell body 211 is provided with a shell stop rib 223, and the shell stop rib 223 is located at one end of the second shell body 211 close to the U-shaped crimping wing 212. The inner wall of the installation cavity 102 is provided with a shell guide surface 110 and a shell stop surface 111 which are arranged to cooperate with the shell stop rib 223. The shell stop rib 223 can contact and cooperate with the shell stop surface 111 to form a limit.

[0039] During assembly, the locking windows 108 on both sides of the secondary lock 101 are pressed into the pre-locking hanging platform 106 to complete the pre-locking, and then the terminal assembly 20 is installed in the installation cavity 102 in the plastic shell body 100, so that the primary locking position rib 220 contacts and cooperates with the primary locking spring arm 105 to form a limit. At this time, the primary locking position rib 220 contacts the primary locking spring arm 105 to play an anti-return and limit role. Then the secondary lock 101 is pressed into the final locking hanging platform 107, so that the end of the retaining wall 109 is inserted into the locking groove 222, and cooperates with the locking groove 222 to form a limit. At this time, the retaining wall 109 and the locking groove 222 play an anti-return and limit role.

[0040] like Figure 8 As shown, in order to enhance the structural strength of the retaining wall 109 , a support rib 112 is provided on one side of the retaining wall 109 , and the support rib 112 is fixedly connected to the retaining wall 109 and the secondary lock 101 .

[0041] like Figure 10 to Figure 11 As shown, in order to facilitate the provision of the main holding force for the coaxial female connector and the board-end connector described in the present invention to be mated with each other, it is further preferred that the plastic shell body 100 is provided with a lever elastic lock body 113, an elastic lock protection bridge 114 and an elastic lock protection wall 115, the lever elastic lock body 113, the elastic lock protection bridge 114 and the elastic lock protection wall 115 are arranged in coordination, the lever elastic lock body 113 is provided with a board-end buckle release port 116, the board-end buckle release port 116 is arranged at one end of the lever elastic lock body 113, the lever elastic lock body 113 is provided with an elastic lock reinforcement rib 117, the other end of the lever elastic lock body 113 is provided with an elastic lock unlocking area 118, and the lever elastic lock body 113 is connected to the plastic shell body 100 through an elastic lock fulcrum 119.

[0042] When in use, the male and female connectors can be mated or unlocked by pressing the elastic lock unlocking area 118.

[0043] Among them, a plugging and unplugging auxiliary support wall 120 is provided above the plastic shell body 100. The main function of the plugging and unplugging auxiliary support wall 120 is to provide a force point during the male-female interfitting process, so as to facilitate the interfitting operation. Generally, when the connector operator is performing male-female interfitting, the human fingers cannot have a good force point on the connector. The design of the plugging and unplugging auxiliary support wall 120 is in line with ergonomics and increases the convenience of use.

[0044] like Figure 7 , Fig.12 As shown, in order to facilitate the stable connection between the central conductor 207 and the insulating core 206, this embodiment is improved on the basis of the above embodiment, and the difference from the above embodiment is that three anti-retraction thorns 228 are provided on the central conductor 207, and the three anti-retraction thorns 228 are arranged in cooperation and fixedly connected to the central conductor 207, and a pair of stop skylights 229 are provided on the insulating core 206, and the pair of stop skylights 229 are arranged in cooperation on the insulating core 206; When the center conductor 207 is inserted into the insulating core 206 , one of the anti-backward thorns 228 can be matched with one of the stop windows 229 .

[0045] The present invention provides three anti-retraction thorns 228 on the center conductor 207 and a pair of stop windows 229 on the insulating core 206. When in use, when the center conductor 207 is inserted into the insulating core 206, the anti-retraction thorns 228 cooperate with the stop windows 229 to achieve an anti-retraction effect. Compared with the traditional center conductor 207 that only relies on two thorns to prevent retreat, the present invention has a stronger anti-retraction effect. At the same time, the three anti-retraction thorns 228 can ignore the assembly direction. When in use, when the center conductor 207 is inserted into the insulating core 206, no matter in which direction it is assembled, it can be ensured that there is an anti-retraction thorn 228 that cooperates with one of the stop windows 229, effectively preventing the center conductor 207 from retreating from the insulating core 206, significantly improving the stability of the connection between the center conductor 207 and the insulating core 206, and thus ensuring the stability of the signal transmission of the coaxial female connector. The problem of unstable connection between the center conductor 207 and the insulating core 206 and unstable signal transmission of the coaxial female connector due to poor anti-retraction effect of the center conductor 207 when the current coaxial female connector signal transmission structure 201 is in use is solved.

[0046] like Fig.12 As shown, in order to improve the reliability of the connection between the coaxial cable 208 and the center conductor 207, this embodiment is modified on the basis of the above embodiment. The difference from the above embodiment is that the center conductor 207 includes a spring piece portion 230, a conductor body 231 and a cable crimping wing 232, the spring piece portion 230 is fixedly arranged on one side of the conductor body 231, the cable crimping wing 232 is fixedly arranged on the other side of the conductor body 231, and three anti-retraction spikes 228 are cooperatively arranged on the conductor body 231 and fixedly connected to the conductor body 231.

[0047] One end of the coaxial cable 208 is fixedly connected to the central conductor 207 via the cable crimping wing 232 , and one end of the cable crimping wing 232 that contacts the coaxial cable 208 is provided with a plurality of anti-slip grooves.

[0048] When in use, the center conductor 207 adopts a combination design of a spring piece portion 230, a conductor body 231 and a cable crimping wing 232, and the cable crimping wing 232 is fixedly connected to the coaxial cable 208. The plurality of anti-slip grooves provided at the contact end increase the friction and bite force with the coaxial cable 208, prevent the cable from falling off, ensure the electrical connection is stable, and improve the reliability of the connection between the coaxial cable 208 and the center conductor 207. This structure can effectively avoid signal interruption caused by loose cables in a vibration environment.

[0049] like Fig.12 As shown, in order to facilitate the connection with the board-end connector, this embodiment is modified on the basis of the above embodiment. The difference from the above embodiment is that the spring piece portion 230 includes a pair of arc-shaped spring pieces 233 that are arranged in a matching manner, and one end of the pair of arc-shaped spring pieces 233 is respectively fixedly connected to the conductor body 231, and the other end is respectively provided with an arc-shaped portion 234, and the arc-shaped portions 234 on the pair of arc-shaped spring pieces 233 can cooperate to form a trumpet-shaped guide portion 235.

[0050] When in use, a pair of arc-shaped spring pieces 233 of the spring piece portion 230 form a trumpet-shaped guide portion 235, which is convenient for connection with other components and can ensure good electrical contact, reduce contact resistance, reduce signal transmission loss, and improve signal transmission efficiency and quality. It is suitable for scenarios with high requirements on signal quality, such as high-speed data transmission.

[0051] like Figure 12 to Figure 13 As shown, in order to further improve the reliability of the connection between the center conductor 207 and the insulating core 206, this embodiment is modified on the basis of the above embodiment. The difference from the above embodiment is that a flange stop block 236 is provided on the conductor body 231, and a conductor stop surface 237 which is arranged in cooperation with the flange stop block 236 is provided in the insulating core 206. When the center conductor 207 is inserted into the insulating core 206, the flange stop block 236 contacts and limits the conductor stop surface 237.

[0052] When in use, the flanged stop block 236 on the conductor body 231 cooperates with the conductor stop surface 237 in the insulating core 206 to form precise limiting and positioning. At the same time, when the center conductor 207 is inserted into the insulating core 206, the flanged stop block 236 contacts and limits the conductor stop surface 237, which not only ensures the correct position of the center conductor 207 in the insulating core 206, but also further enhances the stability of the connection.

[0053] like Fig.13 As shown, in order to conveniently avoid interference caused by deformation of the arc-shaped spring piece 233, this embodiment is modified on the basis of the above embodiment. The difference from the above embodiment is that a spring piece avoidance hole 238 is provided in the insulating core 206, and the spring piece avoidance hole 238 is arranged in conjunction with a pair of arc-shaped spring pieces 233.

[0054] When in use, the arrangement of the spring piece avoiding hole 238 can effectively prevent the arc spring piece 233 from interfering with the insulating core 206 during operation, thereby ensuring the normal operation of the arc spring piece 233 and maintaining a good electrical connection, which is conducive to stable signal transmission.

[0055] like Figure 14 to Figure 15 As shown, as a further preferred embodiment, the coaxial cable 208 includes a cable copper core 239, a cable insulation layer 240, a cable shielding aluminum foil layer 241, a cable shielding copper wire layer 242 and a cable insulation outer jacket 243 which are arranged in sequence from the inside to the outside, one end of the cable copper core 239 is fixedly connected to the center conductor 207 through a cable crimping wing 232, and a plurality of anti-slip rib grooves are arranged in conjunction with the cable copper core 239.

[0056] A crimping ring 244 is provided at one end of the cable shielding copper wire layer 242, a triangular crimping wing 245 is provided at one end of the crimping ring 244, and a triangular crimping groove 246 is provided at the other end to cooperate with the triangular crimping wing 245. When the crimping ring 244 is crimped onto the cable shielding copper wire layer 242, the triangular crimping wing 245 is located in the triangular crimping groove 246.

[0057] like Fig.15 As shown, the triangular crimping wings 245 and the triangular crimping grooves 246 are respectively located at the two ends of the seam of the crimping ring 244.

[0058] like Fig.16 As shown, after the crimping ring 244 is crimped onto one end of the cable shielding copper wire layer 242 , it is necessary to fold back one end of the cable shielding copper wire layer 242 to cover the crimping ring 244 .

[0059] The cable shielding aluminum foil layer 241 and the cable shielding copper wire layer 242 of the coaxial cable 208 can effectively shield external electromagnetic interference and ensure that internal signal transmission is not affected. The crimping ring 244 design at one end of the cable shielding copper wire layer 242 cooperates with the triangular crimping wing 245 and the triangular crimping groove 246 to ensure that the crimping ring 244 is firmly crimped on the cable shielding copper wire layer 242, which can enhance the stability of the connection and further improve the stability of signal transmission. The cable insulation layer 240 and the cable insulation jacket 243 provide insulation protection for the internal structure of the cable, prevent leakage and short circuit, and ensure the normal operation of the connector.

[0060] A coaxial female connector assembly method, applied to the coaxial female connector described above, comprises the following steps: Step S1: assembling the terminal assembly 20; Step S11: assembling the shielding metal shell structure 200; Specifically, one end of the first shell body 209 is inserted into the second shell body 211, and then the first shell body 209 and the second shell body 211 are fixed by laser welding, so that the shielding metal shell structure 200 can be assembled; Step S12: assembling the signal transmission structure 201; Specifically, one end of the coaxial cable 208 is cut to expose a portion of the cable copper core 239, the cable insulation layer 240, the cable shielding aluminum foil layer 241 and the cable shielding copper wire layer 242, and then the cable copper core 239 is crimped and fixed on the center conductor 207 through the cable crimping wing 232, and then the center conductor 207 is inserted into the insulating core 206, so that one of the anti-retraction thorns 228 and one of the stop windows 229 form a matching limit, and at the same time, the flange stop block 236 is contacted and limited with the conductor stop surface 237, and the assembly of the signal transmission structure 201 is completed; Step S13: Assembling the assembled signal transmission structure 201 with the assembled shielding metal housing structure 200 to complete the assembly of the terminal assembly 20; Specifically, the assembled signal transmission structure 201 is inserted into the assembled shielding metal shell structure 200, so that the plurality of fixed points 217 are located in the annular stop groove 218, and the assembly of the terminal assembly 20 is completed; Step S2: Assembling the assembled terminal assembly 20 and the housing assembly 10 to complete the assembly of the coaxial female connector; Specifically, the locking windows 108 on both sides of the secondary lock 101 are pressed into the pre-locking hanging platform 106 to complete the pre-locking, and then the assembled terminal assembly 20 is installed in the installation cavity 102 in the plastic shell body 100, so that the primary locking position rib 220 contacts and cooperates with the primary locking spring arm 105 to form a limit, and then the secondary lock 101 is pressed into the final locking hanging platform 107, so that the end of the retaining wall 109 is inserted into the locking groove 222, and cooperates with the locking groove 222 to form a limit, and the assembly of the coaxial female connector is completed.

[0061] The method of the present invention can quickly complete the assembly of the coaxial female connector.

[0062] Working principle of the present invention: The present invention realizes the signal transmission, shielding and mechanical anti-retraction functions of the shielded metal shell structure 200 by setting the shielded metal shell structure 200 in the coaxial female connector as the first shielding shell 202 and the second shielding shell 203, using the first shielding shell 202 for signal transmission and shielding, and using the second shielding shell 203 for stopping. At the same time, by setting one end of the first shielding shell 202 in the second shielding shell 203, the signal transmission structure 201 is installed in the first cavity 204 and the second cavity 205, so that the signal transmission path does not need to pass through the second shielding shell 203, but only needs to pass through the first shielding shell 202, which effectively reduces the interference and mutation of the signal and improves the stability of the signal transmission.

[0063] The above-mentioned embodiments only express the specific implementation of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A coaxial female connector, characterized in that: It comprises a housing assembly (10) and a terminal assembly (20), wherein one end of the terminal assembly (20) can be inserted into the housing assembly (10) and is detachably connected to the housing assembly (10); The terminal assembly (20) comprises a shielding metal shell structure (200) and a signal transmission structure (201); the shielding metal shell structure (200) comprises a first shielding shell (202) and a second shielding shell (203); a first cavity (204) penetrating two ends of the first shielding shell (202) is provided in the first shielding shell (202); a second cavity (205) penetrating two ends of the second shielding shell (203) is provided in the second shielding shell (203); one end of the first shielding shell (202) is plugged into the second cavity (205) and is fixedly connected to the second shielding shell (203); wherein the first shielding shell (202) and the second shielding shell (203) are stamped metal parts; The signal transmission structure (201) comprises an insulating core (206), a center conductor (207) and a coaxial cable (208); the center conductor (207) is inserted into the insulating core (206) and is detachably connected to the insulating core (206); the center conductor (207) and the insulating core (206) are arranged in a first cavity (204) and are detachably connected to a first shielding shell (202); one end of the coaxial cable (208) passes through the second cavity (205) and extends into the first cavity (204) to be fixedly connected to one end of the center conductor (207).

2. A coaxial female connector according to claim 1, characterized in that: The first shielding shell (202) comprises an integrally formed first shell body (209) and a connecting portion (210), and the second shielding shell (203) comprises an integrally formed second shell body (211) and a U-shaped crimping wing (212); the first shell body (209) is inserted into the second shell body (211) and fixedly connected to the second shell body (211); the connecting portion (210) is located outside the second shell body (211) and is used to connect to a board-end connector; one end of the coaxial cable (208) is fixedly connected to the second shielding shell (203) via the U-shaped crimping wing (212).

3. A coaxial female connector according to claim 2, characterized in that: The connecting portion (210) and the first shell body (209) are provided with a first stamped seam (213), wherein at least one first dovetail connection structure (214) is provided at the first stamped seam (213) on the first shell body (209), the first dovetail connection structure (214) includes a first dovetail groove and a first dovetail block, the first dovetail groove and the first dovetail block are arranged in cooperation, and the second shell body (211) and the U-shaped crimping wing (212) are provided with a second stamped seam (215), wherein at least one second dovetail connection structure (216) is provided at the second stamped seam (215) on the second shell body (211), the second dovetail connection structure (216) includes a second dovetail groove and a second dovetail block, the second dovetail groove and the second dovetail block are arranged in cooperation, and the first stamped seam (213) and the second stamped seam (215) are arranged in an offset manner.

4. A coaxial female connector according to claim 3, characterized in that: A plurality of fixing points (217) are provided on the inner side wall of the first shell body (209), and the plurality of fixing points (217) are located on the inner side wall of the first cavity (204). An annular stop groove (218) is provided on the insulating core (206) and is arranged in cooperation with the plurality of fixing points (217). When the insulating core (206) is inserted into the first cavity (204), the plurality of fixing points (217) are located in the annular stop groove (218) and cooperate with the annular stop groove (218) to form a limit.

5. A coaxial female connector according to claim 4, characterized in that: At least one pair of interference ribs (219) is provided on the insulating core (206); the at least one pair of interference ribs (219) is cooperatively arranged on the insulating core (206) and fixedly connected to the insulating core (206); when the insulating core (206) is inserted into the first cavity (204), the at least one pair of interference ribs (219) interferes with the inner wall of the first cavity (204).

6. A coaxial female connector according to claim 5, characterized in that: The housing assembly (10) comprises a plastic housing body (100) and a secondary lock (101); a mounting cavity (102) penetrating through both ends of the plastic housing body (100) is provided in the plastic housing body (100); the terminal assembly (20) can be plugged into the mounting cavity (102) and is detachably connected to the plastic housing body (100); a mounting notch (103) is provided on the plastic housing body (100); a positioning window (104) is provided in the mounting notch (103); the positioning window (104) is communicated with the mounting cavity (102); a primary lock spring arm (105) is provided at the positioning window (104); one end of the primary lock spring arm (105) is connected to the plastic housing body (100); The secondary lock (101) is fixedly connected, and a pre-locking hanging platform (106) and a final locking hanging platform (107) are provided on both sides of the installation slot (103). The secondary lock (101) is arranged at the installation slot (103). Locking windows (108) are provided on both sides of the secondary lock (101). The locking windows (108) are arranged in coordination with the pre-locking hanging platform (106) and the final locking hanging platform (107). The secondary lock (101) can be detachably connected to the pre-locking hanging platform (106) and the final locking hanging platform (107) through the locking windows (108). A retaining wall (109) is provided on one side of the bottom of the secondary lock (101), and one end of the retaining wall (109) can be inserted into the installation cavity (102) through the positioning window (104).

7. A coaxial female connector according to claim 6, characterized in that: The second shell body (211) is provided with a primary locking rib (220) and a secondary locking rib (221) which are arranged in sequence, and a locking groove (222) is provided between the primary locking rib (220) and the secondary locking rib (221). The primary locking rib (220) can be in contact with the primary locking spring arm (105) to form a limit, and the end of the retaining wall (109) can be inserted into the locking groove (222) and cooperate with the locking groove (222) to form a limit.

8. A coaxial female connector according to claim 7, characterized in that: The second shell body (211) is provided with a shell stop rib (223), and the shell stop rib (223) is located at one end of the second shell body (211) close to the U-shaped crimping wing (212). The inner wall of the installation cavity (102) is provided with a shell guide surface (110) and a shell stop surface (111) that are arranged in cooperation with the shell stop rib (223). The shell stop rib (223) can contact and cooperate with the shell stop surface (111) to form a limit.

9. A coaxial female connector according to claim 8, characterized in that: A support rib (112) is provided on one side of the retaining wall (109), and the support rib (112) is fixedly connected to the retaining wall (109) and the secondary lock (101).

10. A method for assembling a coaxial female connector, characterized in that: A coaxial female connector used in any one of claims 1 to 9, comprising the following steps: Step S1: assembling the terminal assembly (20); Step S11: assembling the shielding metal shell structure (200); Step S12: assembling a signal transmission structure (201); Step S13: Assembling the assembled signal transmission structure (201) and the assembled shielding metal shell structure (200) to complete the assembly of the terminal assembly (20); Step S2: Assembling the assembled terminal assembly (20) and the housing assembly (10) to complete the assembly of the coaxial female connector.

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