Radio frequency plugTechnical Field
The application relates to the field of radio frequency connectors, in particular to a radio frequency plug.
Background
A radio frequency connector is usually connected with a coaxial cable on a PCB of the existing mobile phone to transmit radio frequency signals, such as antenna signals, high frequency signals between different boards, and the like; in the 5G communication era, transmission in a multi-antenna mode is required, and the traditional single-channel radio frequency connector cannot meet the requirement; in the existing alternatives, the technical solution of realizing the multichannel transmission of antenna signals by adopting a board-to-board connector is presented.
The patent application No. 201910206829.X discloses a cable connector device for transmitting multi-channel antenna signals by coaxial line combination. The cable assembly comprises an insulating body, conductive terminals, metal sheets, a shielding shell and a cable assembly, wherein the conductive terminals, the metal sheets, the shielding shell and the cable assembly are integrally formed in the insulating body, each grounding terminal comprises a plurality of signal terminals and grounding terminals which are spaced apart from each other, welding feet of the signal terminals and the grounding terminals extend to the rear end of the insulating body to form a row, and the grounding terminals still need welding cables, so that the problem of extremely high welding precision requirement caused by small welding foot spacing is caused.
Disclosure of Invention
In view of the above, it is necessary to provide a radio frequency plug to solve the problem that the soldering precision requirement is very high due to the minimum pitch of the soldering legs because the soldering legs of the signal terminal and the grounding terminal of the conductive terminal are both required to be soldered with the cable.
In order to solve the technical problems, the application provides a radio frequency plug, which comprises a metal insert provided with a front plate part and a rear plate part, a plurality of conductive terminals, an insulating base for fixing the metal insert and the conductive terminals into a whole, and a shielding shell coated outside the insulating base, wherein the insulating base comprises a butt joint end provided with a plurality of terminal grooves and an internal inserting space in the vertical direction, a rear extension part formed by extending backwards from the butt joint end and extension arms formed by extending backwards from two lateral sides of the rear extension part, the conductive terminals comprise fixing parts fixed on the rear extension part, welding feet formed at the tail parts of the fixing parts, and elastic contact arms extending forwards from the fixing parts into the terminal grooves, the conductive terminals comprise a plurality of signal terminals and grounding terminals for separating the signal terminals, the front plate part of the plate part is formed in the rear extension part, and welding bosses electrically connected with the grounding terminals are integrally formed at the welding feet positions corresponding to the grounding terminals.
Preferably, the boss includes a bending connection portion formed by bending backward from the front end of the front plate portion, a contact mesa formed by extending horizontally backward from the bending connection portion, and a support end portion formed by bending from the rear end of the contact mesa toward the upper surface of the front plate portion, wherein the support end portion is supported on the upper surface of the front plate portion.
Preferably, the boss is formed by tearing and punching from the front plate portion, and the boss includes a contact land for tearing the front plate portion and projecting to be electrically connected with the solder leg of the ground terminal.
Preferably, the radio frequency plug further comprises a cable assembly, the metal insert further comprises an embedded portion formed by bending and extending from two lateral sides of the rear plate portion upwards, the embedded portion is formed in the extension arm, and a clamping space for assembling and positioning the cable assembly is formed between the pair of extension arms on the upper surface of the rear plate portion.
Preferably, the butt joint end includes the roof and follows the roof downward bulge forms the bulge, the terminal groove runs through the roof with the bulge forms, the butt joint end is equipped with a plurality of with terminal groove spaced apart barrier in longitudinal direction, the butt joint end is close to rear portion one side has seted up interior grafting space, the shield shell including cover in the upper cover plate of insulating pedestal top surface and enclose and locate the front side and the lateral outside of insulating pedestal shield frame, shield frame with form outer grafting space between the bulge.
Preferably, the elastic contact arm extends forward from the holding portion, and includes a first spring arm extending obliquely forward and downward, a second spring arm extending downward from a front end of the first spring arm, a third spring arm extending obliquely backward and upward from a distal end of the second spring arm, a bent end portion bending forward and upward from a distal end of the third spring arm, and a contact formed at a bent position of the third spring arm and the bent end portion.
Preferably, a part of the first spring arm, a part of the second spring arm and a part of the third spring arm of the elastic contact arm are respectively located in the terminal groove and separated by the barrier, and the contact portion is exposed back into the inner insertion space.
Preferably, a terminal limiting groove corresponding to the terminal groove is formed in the rear extension part of the insulating base in the longitudinal direction, the fixing part of the conductive terminal is assembled and fixed in the terminal limiting groove, a filling hole which penetrates up and down is formed in one side, close to the butt joint end, of the rear extension part, and a plurality of welding platforms for accommodating welding pins of the conductive terminal and protrusions for spacing the welding platforms are formed in one side, far away from the butt joint end, of the rear extension part; and a molding block for fixing the conductive terminal is formed in the filling hole by injection molding.
Preferably, two ends of the filling hole in the longitudinal direction are respectively provided with a plurality of clamping blocks protruding from two lateral sides of the terminal limiting groove so as to fix the conductive terminal.
Preferably, the molding block includes a covering portion that covers an upper surface of the leg of the ground terminal.
According to the radio frequency plug, the boss is integrally formed above the front plate part of the metal insert, so that the welding leg of the grounding terminal extends to the upper part of the boss and is in electrical contact with the boss, and a cable is not required to be welded on the welding leg of the grounding terminal; meanwhile, the welding leg of the grounding terminal and the welding leg of the signal terminal are connected to each other on the same horizontal plane, so that the material belt with the terminal can be broken at one time, and the process flow is simplified.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
FIG. 1 is a perspective view of a radio frequency plug according to the present application;
FIG. 2 is a perspective view of another angle of the RF plug of the present application;
FIG. 3 is an exploded perspective view of the RF plug of the present application;
fig. 4 is a perspective view of a conductive terminal of the rf plug of the present application;
FIG. 5 is a perspective view of a metal insert of the RF plug of the present application;
FIG. 6 is a perspective view of a metal insert and an insulating housing of a radio frequency plug according to the present application;
FIG. 7 is a perspective view of a metal insert and an insulating housing of a radio frequency plug according to another embodiment of the present application;
FIG. 8 is a perspective view of another angle of the metal insert, conductive terminal and insulating housing of the RF plug of the present application;
fig. 9 is a perspective view of the rf plug of the present application with the shield housing removed;
FIG. 10 is a cross-sectional view taken along the line A-A of FIG. 1;
FIG. 11 is a perspective view of a cable assembly of the RF plug of the present application;
Fig. 12 is a perspective view of a cable assembly of the rf plug of the present application with solder removed.
Description of the main reference numerals
A shielding shell-10; an upper cover plate-11; a shielding frame-12; an insulating base body-20; a butt joint end-21; a bottom wall-211; a projection-212; a barrier-213; terminal slot-214; an extension arm-22; an interpolation space-23; a rear extension-24; a welding stage 241; a protrusion-242; filling holes-243; a cartridge-244; cladding part-245; terminal limit grooves-246; metal insert-30; a plate body part-31; front plate portion-311; a back plate portion-312; an embedded part-32; boss-33; bending the connecting part-331; contact mesa-332; a support end-333; a conductive terminal-40; a signal terminal-40 a; a ground terminal-40 b; a holding portion (41); a fillet-42; a resilient contact arm-43; a first elastic arm-431; a second elastic arm-432; a third elastic arm-433; bending the end part to 434; a contact portion-435; a sink-44; a cable holder-50; lower lug-51; clamping the bottom wall-511; vertical section-512; lower convex hull-513; upper lug-52; clamping the top wall-521; upper convex hull-522; solder or conductive paste-53; forming a block-60; a cable-C; a center conductor-C1; an inner insulating layer-C2; braid-C3; and an outer insulating layer-C4.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be clearly and completely described below with reference to specific embodiments of the present application and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the application.
The definition of the directions in the present application is based on fig. 1, and the definition is based on the front of the front-back direction (longitudinal direction) in the X direction, the right of the left-right direction (transverse direction) in the Y direction, and the upper of the up-down direction (left-right direction) in the Z direction.
Referring to fig. 1 to 3, the rf plug of the present application includes an insulating base 20, a metal insert 30 and a plurality of conductive terminals 40 integrated with the insulating base 20, a cable assembly connected to the conductive terminals 40, and a shielding shell 10 covering the insulating base 20.
Referring to fig. 4 to 10, the metal insert 30 includes a plate body 31 having a front plate 311 and a rear plate 312, an embedded portion 32 formed by bending and extending upward from two lateral sides of the rear plate 312, and a plurality of bosses 33 integrally formed above the front plate 311. The boss 33 is a strip extending from the front end of the front plate 311 to the rear and is formed above the front plate 311, and the boss 33 includes a bent connection portion 331 formed by bending the front end of the front plate 311, a contact mesa 332 formed by extending from the bent connection portion 331 to the rear, and a supporting end 333 formed by bending the rear end of the contact mesa 332 to the rear and supported on the upper surface of the front plate 311.
In another embodiment, the boss 33 may be formed by punching and tearing the front plate 311 upward from the front plate 311.
Referring to fig. 5, 6 and 10, the insulating base 20 includes a butt end 21, a rear extension 24 extending rearward from the butt end 21, and a pair of extension arms 22 extending rearward from two lateral sides of the rear extension 24. The abutting end 21 includes a top wall 211, a protruding portion 212 formed to extend downward from the top wall 211, a plurality of terminal grooves 214 formed through the top wall 211 and the protruding portion 212, a plurality of barrier ribs 213 partitioning the terminal grooves 214 in the longitudinal direction, and an inner insertion space 23 formed through the top wall 211 and the protruding portion 212 and located behind the barrier ribs 213. The upper surface of the rear extension 24 is provided with a plurality of terminal limiting grooves 246 corresponding to the terminal grooves 214 in the longitudinal direction, and the terminal limiting grooves 246 are used for limiting and fixing the conductive terminals 40. The rear end of the rear extension 24 is provided with a plurality of welding tables 241 corresponding to the terminal limiting groove 246, and a plurality of protrusions 242 formed between the welding tables 241. A filling hole 243 penetrating up and down is formed at the front end of the rear extension 24 near the butt end 21. The two lateral sides of the terminal limiting groove 246 are respectively protruded upwards to form a plurality of clamping blocks 244 for limiting and clamping the conductive terminal 40.
The extension arm 22 extends from two lateral sides of the rear extension 24, and the metal insert 30 is integrally formed in the rear extension 24 of the insulating base 20 and the extension arm 22. The metal insert 30 has two lateral embedded portions 32 formed in the extension arms 22, the plate body 31 is formed on the rear extension portion 24 and the lower sides of the two extension arms 22, the front plate 311 is formed in the rear extension portion 24, and the rear extension portion 24 further includes a covering portion 245 covering the front plate 311 at the bottom. The rear plate portion 312 is located above the two extension arms 22 to form a clamping space S3 for assembling and positioning the cable assembly. In practice, the embedded portion 32 of the metal insert 30 may be exposed in the clamping space S3 and electrically contacted with the cable assembly. The lateral width of the rear extension 24 is less than the width between the two extension arms 22. The contact lands 332 of the bosses 33 above the front plate portion 311 are upwardly exposed in the terminal-limiting grooves 246 at the positions of the lands 241.
Referring to fig. 4 with emphasis, the conductive terminals 40 include a plurality of signal terminals 40a and a ground terminal 40b that spaces the signal terminals 40a apart. Each conductive terminal 40 includes a holding portion 41 defined in a terminal-limiting groove 246 of the rear extension 24, a solder leg 42 formed at the rear end of the holding portion 41 and located at the position of the solder land 241, and a resilient contact arm 43 extending forward from the holding portion 41 into the terminal groove 214. The elastic contact arm 43 is suspended in the terminal slot 214, and the elastic contact arm 43 includes a first elastic arm 431 extending obliquely downward and forward, a second elastic arm 432 extending downward and bent from the front end of the first elastic arm 431, a third elastic arm 433 extending obliquely upward and rearward from the end of the second elastic arm 432, a bent end 434 bending upward and forward from the end of the third elastic arm 433, and a contact part 435 formed at the bent position of the third elastic arm 433 and the bent end 434. The rear end of the holding portion 41 extends obliquely downward to form a sinking portion 44. A part of the first spring arm 431, a part of the second spring arm 432, and a part of the third spring arm 433 of the elastic contact arm 43 are separated by the barrier 213, and the contact portion 435 is exposed rearward in the internal insertion space 23.
Referring to fig. 8 to 10, when the metal insert 30 and the insulating base 20 are molded, the conductive terminal 40 with the material strip connected thereto is mounted downward in the terminal limiting groove 246, the soldering leg 42 of the grounding terminal 40b extends to the position of the soldering stand 241 and is overlapped on the contact mesa 332 of the metal insert 30, and the soldering leg 42 of the grounding terminal 40b is in electrical contact with the contact mesa 332. After fixing, the molding block 60 is formed by injection molding again, the molding block 60 fills the filling hole 243 and covers the conductive terminal 40 therein, and the sinking portion 44 of the conductive terminal 40 is located above the filling hole 243 and is covered by the molding block 60. The number of bosses 33 of the metal insert 30 corresponds to the number of ground terminals 40 b.
In yet another embodiment, the metal insert 30 and the conductive terminal 40 may be injection molded in one piece, and the molding block 60 is only a part of the insulating base 20.
The shielding shell 10 comprises an upper cover plate 11 covering the upper part of the insulating base 20 and a shielding frame 12 which is bent downwards from the front end of the upper cover plate 11 and then wraps the periphery of the insulating base 20. An external plugging space S1 is formed between the protruding portion 212 of the insulating base 20 and the shielding housing 12, and a top surface of the external plugging space S1 is the top wall 211.
The signal terminal 40a of the conductive terminal 40 and the solder leg 42 of the ground terminal 40b are on the same horizontal plane, and the material strip is connected to the rear end of the solder leg 42, and after the molding block 60 is injection molded, the material strip can be broken at one time. In injection molding the molding block 60, the insulating block 60 may be extended backward to form a covering portion (not shown) covering the upper portion of the soldering leg 42 of the ground terminal 40b, so that the soldering leg 42 of the ground terminal 40b is not exposed to the upper surface of the soldering stand 241, the pitch of the soldering leg 42 of the signal terminal 40a is widened, the cable is conveniently soldered, and the soldering leg of the ground terminal 40b is prevented from being polluted by soldering tin or soldering flux.
Referring to fig. 11 and 12, the cable assembly includes a cable support 50 and a plurality of cables C fixed in the cable support 50, wherein the cables C are coaxial wires, and each cable C includes a central conductor C1, an inner insulating layer C2 coated outside the central conductor C1, a braid C3 coated on the periphery of the inner insulating layer C2, and an outer insulating layer C4 coated outside the braid C3. The cable holder 50 includes a lower tab 51 and an upper tab 52 which sandwich the braid C3 of the cable C therein, and solder 53 filled between the lower tab 51 and the upper tab 52 and covering the braid C3. The solder 53 firmly welds the lower tab 51, the upper tab 52 and the braid C3 into a whole.
The lower soldering lug 51 comprises a clamping bottom plate 511, vertical parts 512 formed by bending and extending upwards from two transverse ends of the clamping bottom plate 511, and lower convex hulls 513 formed by punching upwards from the clamping bottom plate 511 and spaced from the woven layer C3. The upper lug 52 is a clamping top plate 521, and the clamping top plate 521 is punched downward to form upper convex hulls 522 that space the braid C3 apart. The lateral ends of the clamping top plate 521 are clamped between the vertical portions 512 of the lower lug 51. The upper convex hull 522 is spaced apart from the lower convex hull 513 by the braid C3 to facilitate positioning of the cable C.
After the cable C is fixed by the cable bracket 50, the cable bracket 50 is inserted into the clamping space S3 above the plate body 31, so that the vertical portion 512 is clamped between and electrically contacted with the pair of embedded portions 32 of the metal insert 30.
The center conductor C1 of the cable C extends above the solder leg 42 of the signal terminal 40a and is soldered. Subsequently, the shielding shell 10 is covered outside the insulating base 20, the upper soldering lug 52 is fixed with the upper cover plate 11 of the shielding shell 10 by spot welding, and the lower soldering lug 51 is fixed with the upper surface of the plate body 31 of the metal insert 30 by spot welding.
The radio frequency plug of the application integrally forms the boss 33 above the front plate part 311 of the metal insert 30, so that the welding leg 42 of the grounding terminal 40b extends above the boss 33 and is in electrical contact, and the cable C does not need to be welded on the welding leg 42 of the grounding terminal 40 b; meanwhile, the solder leg 42 of the grounding terminal 40b and the solder leg 42 of the signal terminal 40a are connected to each other on the same horizontal plane, so that the material belt with the terminal can be broken at one time, and the process flow is simplified.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.