CN111293516A - Board-to-board plug - Google Patents

Abstract

The board-to-board plug comprises a plurality of signal terminals and ground terminals which are arranged at intervals, a plug body which fixes the signal terminals and the ground terminals into a whole, a cable which is connected with the signal terminals and a shielding shell which covers the plug body, wherein the plug body comprises a base part and an extension part which is formed by extending the base part backwards, the shielding shell comprises a covering top plate which covers the top surface of the plug body, the front end of the ground terminal is connected with a material bridge which is formed on the base part, and at least part of the upper surface of the material bridge is in contact with the covering top plate and is welded and fixed together. This application board is convenient for welding cable and plug body intensity better to the board plug.

Description

Board-to-board plug

Technical Field

The present application relates to the field of electrical connectors, and more particularly, to a board-to-board plug.

Background

Because the traditional single-channel coaxial connector can not meet the communication requirements of consumer electronic equipment such as smart phones, a multi-channel high-frequency transmission connector in a plate-to-plate form appears. CN110474201A discloses a board-to-board plug, which includes a plug body formed with a plurality of conductive terminals, a cable assembled at the tail of the plug body and welded with the conductive terminals, and a shielding shell covering the plug body. The plug terminal comprises a plurality of signal terminals and a plurality of grounding terminals which are arranged at intervals, each signal terminal and each grounding terminal comprise a contact part and a welding leg which is formed by extending the contact part backwards, the welding leg of each signal terminal is welded with the central conductor of the cable, the welding leg of each grounding terminal needs to be welded with the central conductor of the cable used as grounding, the welding legs of the signal terminals and the grounding terminals are limited to the size of a product, the transverse distance between the welding legs is small, tin-climbing short circuit is easily caused during welding, and the requirement on welding precision is extremely high.

Disclosure of Invention

Therefore, there is a need for a board-to-board plug that directly connects a ground terminal to a shield housing without soldering the solder tails of the ground terminal, thereby improving the soldering yield.

In order to solve the technical problem, the application provides a board to board plug, including a plurality of mutual intervals set up signal terminal and ground terminal, incite somebody to action signal terminal and ground terminal fixing plug body as an organic whole, connect signal terminal's cable and cladding in this external shield shell of plug, the plug body includes the basal portion and certainly the extension that the basal portion back-extension formed, shield shell is including covering the cover roof of plug body top surface, the ground terminal front end be connected with the shaping in material bridge on the basal portion, the upper surface of material bridge at least part with cover the roof contact and by welded fastening together.

Preferably, at least one of the two transverse sides of the material bridge is bent upwards to form a welding plate in contact with the covering top plate, and the welding plate and the covering top plate are welded into a whole.

Preferably, the two transverse sides of the material bridge are both bent upwards to form welding plates in contact with the covering top plate, when the plug body is subjected to injection molding, the front end of the signal terminal is connected with the material bridge into a whole, and after the plug body is subjected to injection molding, the connection between the signal terminal and the material bridge is cut off.

Preferably, the connection between the signal terminal and the material bridge is cut by laser cutting, and a notch is formed at a position corresponding to the base.

Preferably, the board-to-board plug further includes a metal reinforcement, the metal reinforcement includes a main body portion formed in the base and a protruding strip formed by extending upward from the main body portion, and a slot for the protruding strip to be inserted is formed in the cover top plate.

Preferably, the main body portion is at least partially exposed to an upper surface of the cover top plate, and the main body portion is in contact with the cover top plate and is welded and fixed together.

Preferably, the slot and the protruding strip both extend in the front-rear direction, the length of the slot in the front-rear direction is equal to the length of the protruding strip, and a guide inclined surface is formed on the outer periphery of the slot facing one side of the plug body in a punching mode.

Preferably, the transverse width of the slot is greater than the thickness of the convex strip, a pair of elastic convex parts are formed on two transverse sides of the slot in a protruding manner, and the distance between the pair of elastic convex parts is equal to the thickness of the convex strip.

Preferably, the sand grip is blocked in the slot, and the slot is in four directions of front, back, left and right sides to the sand grip is spacing, prevents to be with the plug body of metal reinforcement shaping in is rocked.

Preferably, the plug body further includes an island portion formed by downwardly protruding from the base portion and a pair of extension arms formed by rearwardly extending from rear ends of both lateral sides of the extension portion, the island portion includes an island main body and reinforcing end portions located at both lateral ends of the island main body, the metal reinforcing member is formed on the reinforcing end portions to reinforce strength of the reinforcing end portions, the metal reinforcing member further includes a first reinforcing wall bent and extended downwardly from the main body and covering lateral outer side surfaces of the reinforcing end portions, a second reinforcing wall bent from a bottom end of the first reinforcing wall and covering a bottom surface of the reinforcing end portions, and a pair of third reinforcing walls bent from front and rear sides of the second reinforcing wall and covering front and rear end surfaces of the reinforcing end portions.

Preferably, the bottom of the extension portion protrudes downward to form a protruding portion, the rear end of the extension portion is recessed downward from the top to form a soldering station, the soldering station includes a plurality of soldering grooves corresponding to the signal terminals, each of the signal terminals and the ground terminals includes a U-shaped contact portion formed outside the island portion, a holding portion formed by extending rearward from the U-shaped contact portion, and a soldering foot extending rearward from the holding portion to the soldering station, the soldering foot of each signal terminal extends into the soldering groove to be soldered to the cable, the upper portion of the soldering foot of the ground terminal is covered by the plug body to form a covering portion, the U-shaped contact portion includes a first contact arm formed on the front end surface of the island portion, a second contact arm formed on the rear end surface of the island portion, and a connecting portion formed on the bottom surface of the island portion and connecting the first and second contact arms, the signal terminal and the ground terminal are connected to the solder bridge after being bent through the bottom of the first contact arm .

This application board is in to the board plug ground terminal front end body coupling material bridge makes material bridge integrated into one piece in the basal portion, simultaneously the horizontal both sides of material bridge upwards bend form with cover the welding plate of roof contact, make through spot welding the welding plate with cover roof welded fastening together, realize ground terminal's ground connection and strengthen the intensity of plug body.

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 application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a perspective view of a board-to-board plug of the present application;

FIG. 2 is a perspective view of another angle of the plate-to-plate plug of the present application;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 4 is a cross-sectional view taken along the line B-B of FIG. 1;

fig. 5 is a combination view of the plug body, plug terminals and metal reinforcement of the board-to-board plug of the present application;

fig. 6 is a combination view of the plug body, plug terminals and metal reinforcement of the board-to-board plug of the present application at another angle;

fig. 7 is a perspective view of the plug terminal of the plate-to-plate plug of the present application;

FIG. 8 is a perspective view of a metal reinforcement member of the plate-to-plate plug of the present application;

fig. 9 is a perspective view of the shield housing of the board-to-board plug of the present application;

FIG. 10 is a perspective view of the cable assembly of the plate-to-plate plug of the present application;

figure 11 is a perspective view of the shield housing of the board-to-board plug of the present application during assembly;

fig. 12 is a combination diagram of the board-to-board plug of the present application, before the plug body is injection molded, the plug terminal and the metal reinforcement are connected with the material strap.

Description of the main component symbols:

a shielding shell-10; a cover top plate-11; slotting-111; a guide bevel-112; an elastic projection-113; covering the front wall-12; covering the side wall-13; a first cover sidewall-131; an inner fold-132; a second cover sidewall-133; a protection portion-14; a first protection portion-141; a second protection portion-142; a support portion-143; a tightening part-144; a plug body-20; a base-21; a top wall-211; cutting a hole-212; positioning hole-213; an island portion-22; an island body-221; a reinforced end-portion-222; an extension-23; a projection-231; an interior recess-232; a welding table-233; weld chamber-2331; cover-2332; an extension arm-24; a limiting step-241; an escape portion-25; a plug terminal-30; a U-shaped contact portion-31; a first contact arm-311; a second contact arm-312; a connecting portion-313; a holding portion-32; a fillet-33; a material bridge-35; a welding plate-36; a metal reinforcement-40; a main body portion-41; a first reinforcing wall-42; a second reinforcing wall-43; a third reinforcing wall-44; convex strips-45; notch-46; cable assembly-50; a cable-51; a center conductor-511; an inner insulating layer-512; a braid-513; an outer insulating layer-514; a cable holder-52; solder pad-521; solder or conductive paste-522; a clamping bar-523.

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 described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments.

In the present application, the X direction shown in fig. 1 is the front in the left-right direction (lateral direction), the Y direction is the front in the front-rear direction (longitudinal direction), and the Z direction is the upper side in the up-down direction (vertical direction).

Referring to fig. 1 and 2, the plate-to-plate plug of the present application includes a plug body 20, a plurality of plug terminals 30 and metal reinforcements 40 integrally formed in the plug body 20, a cable assembly 50 connected to the plug terminals 30, and a shielding shell 10 covering the plug body 20.

Referring to fig. 3 to 6, the plug body 20 includes a base 21, an island 22 formed to protrude downward from the middle of the base 21, an extension 23 formed to extend rearward from the base 21, extension arms 24 formed to extend rearward from both lateral sides of the extension 23, and a relief portion 25 formed between a pair of the extension arms 24. The base 21 includes a top wall 211, and a positioning hole 213 is formed on the top surface of the top wall 211 corresponding to the island 22. The island portion 22 includes an island portion main body 221 and reinforcing end portions 222 formed at both lateral ends of the island portion main body 22. The island 22 is formed to protrude downward from the top plate 211.

The extension portion 23 includes a protrusion 231 protruding downward, inner recesses 232 formed at both lateral sides of the extension portion 23, and a land 233 recessed downward from a top surface of the extension portion 23. The lower surface of the protrusion 231 is lower than the lower surface of the extension arm 24 to form a limit step 241 on the rear end surface of the protrusion 231.

As shown in fig. 7, the plug terminal 30 includes a U-shaped contact portion 31 integrally formed on the island 22, a holding portion 32 extending backward from the U-shaped contact portion 31, and a solder tail 33 extending backward from the holding portion to the solder stage 233.

The plug terminal 30 includes a plurality of signal terminals 30a and ground terminals 30b arranged at intervals, the soldering station 233 includes a plurality of soldering grooves 2331 corresponding to the soldering legs of the signal terminals 30a, and the soldering portion of the ground terminal 30b is located on the soldering station 233 and is filled with plastic to form a covering portion 2332 when the plug body 20 is injection molded. The width of the solder leg 33 of the signal terminal 30a is widened, and the solder leg 33 of the ground terminal 30b beside is covered without soldering.

The U-shaped contact portion 31 includes a first contact arm 311 attached to the front end surface of the island 22, a second contact arm 312 attached to the rear end surface of the island 22, and a connecting portion 313 crossing the bottom surface of the island 22 and connecting the first and second contact arms 311, 312. The holding portion 32 is integrally formed in the top wall 211 of the base portion 21 and extends rearward into the extending portion 23, a positioning hole 213 formed in the top wall 211 passes through a space between the first and second contact arms 311, 312 of the U-shaped contact portion 31, so that when the plug body 20 is injection molded, an injection mold needle can conveniently clamp the connecting portion 313 from above through the positioning hole 213 to position the plug terminal 30. The solder leg 33 is formed by bending downward from the connecting portion 32 and then bending and extending backward, so that a relatively thick plastic layer (i.e., a solder stage 233) is provided between the solder leg 33 and the shield case 10.

As shown in fig. 3, 4, 5, 7 and 12, the front end of the plug terminal 30 is further connected with a material bridge 35 during injection molding, and two lateral sides of the material bridge 35 are bent upward to form welding plates 36. When the plug body 20 is injection molded, the front end and the rear end of the plug terminal 30 are respectively connected with a first terminal material belt 30c and a second terminal material belt 30d, the transverse outer side of the metal reinforcing part 40 is connected with a reinforcing part material belt 40a, the left metal reinforcing part 40 and the right metal reinforcing part 40 are connected through the same reinforcing part 40a, and the reinforcing part material belt 40a is superposed and positioned with the first terminal material belt 30c or the second terminal material belt 30 d. Meanwhile, the positioning pin of the injection mold vertically clamps the connection portion 313 of the plug terminal 30 through the positioning hole 213 for positioning. After injection molding, the second terminal tape 30d connected to the rear end of the solder fillet 33 and the reinforcement tape 40a connected to the metal reinforcement 40 are cut off, and the first terminal tape 30c connected to the bridge 35 in front of the plug terminal 30 is left. The first terminal strip 30c is left to be cut after the cable assembly 50 is automatically assembled. After the cable assembly 50 is soldered by the first terminal tape 30c, the connection of the ground terminal 30b to the material bridge 35 is maintained after cutting the first terminal tape 30c while cutting off the connection between the signal terminals 30a and the material bridge 25 and forming the cut holes 212 at the corresponding positions of the base 21. And the connection between the signal terminal 30a and the material bridge 25 can be cut off by laser cutting.

As shown in fig. 8, the metal reinforcing member 40 includes a main body 41 formed on the top wall 211, a first reinforcing wall 42 bent downward from the main body 41 and formed over the lateral outer side of the reinforcing end 222 of the island 22, a second reinforcing wall 43 bent inward from the bottom of the first reinforcing wall 42 and covering the bottom surface of the reinforcing end 222, a pair of third reinforcing walls 44 bent upward from the front and rear sides of the second reinforcing wall 43 and covering the front and rear end surfaces of the reinforcing end 222, and a protruding strip 45 bent upward from the lateral outer side of the main body 41. The upper surface of the main body portion 41 is exposed to the top surface of the top wall 211. The protruding strips 45 extend in the front-rear direction and have a certain length. The main body 41 has a notch 46 near the extending position of the protruding strip 45 for filling plastic material to make the combination of the plug body 20 and the metal reinforcement 40 more firm. The protruding strip 45 is formed by bending and extending upward from the rear end portion of the body 41.

As shown in fig. 10, the cable assembly 50 includes a plurality of cables 51 and a cable holder 52 for integrally combining the plurality of cables 51. The cable 51 is a coaxial cable, and the cable 51 includes a central conductor 511 welded to the fillet 33 of the signal terminal 30a, an inner insulating layer 512 coated outside the central conductor 511, a braid 513 coated outside the inner insulating layer 512, and an outer insulating layer 514 coated outside the braid 513. The cable holder 52 comprises a soldering lug 521, a clamping bar 523 for clamping the braided layers 513 of the coaxial cables 51 with the soldering lug 521, and soldering tin or conductive adhesive 522 for fixing the braided layers 513 of the coaxial cables 51 between the soldering lug 521 and the welding bar 523, wherein the soldering tin or conductive adhesive 522 is used for bonding and fixing the braided layers 513 of the coaxial cables 51 together and is integrally fixed with the soldering lug 521 and the clamping bar 523.

The cable assembly 50 is assembled behind the soldering station 233, the inner insulating layers 512 of the plurality of coaxial cables 51 are clamped into the avoiding portion 25 between the pair of extension arms 24, the cable holder 52 is located behind the pair of extension arms 24, and the central conductor 511 extends forward to the soldering leg 33 of the signal terminal 30a in the soldering groove 2331 and is soldered and fixed.

In one embodiment, the cable holder 52 can be eliminated by directly soldering the cable 51 to the solder leg of the signal terminal 30a in the solder recess 2331.

As shown in fig. 7 and 9, the shielding shell 10 includes a top cover plate 11 covering the top wall 211 of the plug body 20 and the cable support 52, a front cover wall 12 formed by bending the front end of the top cover plate 11 downward, a side cover wall 13 formed by bending and extending the two lateral ends of the front cover wall 12 backward, and a protection portion 14 formed by bending the two lateral sides of the top cover plate 11 downward and surrounding the side cover wall 13. The position of the top cover plate 11 corresponding to the protruding strip 45 is provided with a slot 111, and the outer periphery of the slot 111 facing one side of the plug body 20 is formed with a guiding inclined plane 112 by stamping. The transverse width of the slot 111 is greater than the thickness of the convex strip 45, two transverse sides of the slot 111 respectively extend oppositely to form a pair of elastic convex blocks 113, the distance between the elastic convex blocks 113 is consistent with the thickness of the convex strip 45 so as to clamp the convex strip 45 in the left-right direction, and the length of the slot 111 in the front-back direction is equal to the length of the convex strip 45 so as to limit the convex strip 45 in the front-back direction. The elastic protrusions 113 have certain elasticity.

The covering sidewall 13 includes a first covering sidewall 131 located on the lateral outer side of the base 21, an inward folded portion 132 formed by oppositely folding the rear end of the first covering sidewall 131 and located on the lateral two sides of the extending portion 23, and a second covering sidewall 133 formed by extending the rear end of the inward folded portion 132 backward and clamped between the extending arm 23 and the lateral outer side of the cable holder 52. The protection part 14 includes a first protection part 141 located outside the first covering sidewall 131 and the inward folding part 132, a second protection part 142 extending from the back of the first protection part 141 and located outside the second covering sidewall 133, a support part 143 bent reversely from the tail of the second protection part 142 and extending to the inner side of the second covering sidewall 133, and a tightening part 144 bent from the bottom of the second protection part 142 to the cable bracket 52 and covering the lower surface of the cable bracket 52. The gripping portion 144 is supported below a pair of the extension arms 24.

Simultaneously, the part 144 of cramping still receives supporting part 143 is the ascending support in upper and lower direction, avoids cramping part 144 only to support in on the extension arm 24 of plastic material, and the holding power is not enough and lead to yielding defect, and directly certainly the inside reverse bending of protection part 14 rear end forms supporting part 143 can not cause the product size grow, the advantage of saving space.

The shielding shell 10 is directly bent inward at the rear end of the protection portion 14 to form a support portion 143 located inside the second covering sidewall 133 to support the tightening portion 144 bent from the bottom of the second protection portion 142, so as to avoid the problem that the conventional tightening portion 144 is only supported by the extension arm 24 made of plastic material to cause bending deformation, and the external dimension of the product is not changed, thereby saving space. The upper surface of the main body portion 41 of the metal reinforcing member 40 is in contact with the cover top plate 11.

When the board-to-board plug is assembled, the cable assembly 50 is assembled and welded on the welding table 23 at the rear end of the plug body 20 according to the above manner, the plug body 20 is installed into the space enclosed by the covering top plate 11 and the covering side wall 13 of the shielding shell 10 from bottom to top, and at the moment, the convex strip 45 is clamped into the groove 111 on the covering top plate 11 to limit the position in the front, back, left and right directions; then, the tightening portion 144 is bent to make the tightening portion 144 abut against the limiting step 241 at the rear end edge of the protruding portion 231 to prevent the plug body 20 from withdrawing backwards. Finally, the upper surface of the main body portion 41 of the metal reinforcing member 40 and the cover top plate 11 are welded and fixed together by spot welding on the cover top plate 11 to reinforce the coupling force between the header body 20 and the shield shell 10. The welding plates 36 formed by bending the two lateral sides of the material bridge 35 are located in front of the main body 41, the welding plates 36 are in contact with the cover top plate 11, and the welding plates 36 are welded and fixed with the cover top plate 11 by spot welding at corresponding positions of the cover top plate 11, so that the grounding terminal 30b is grounded and the bonding force between the plug body 20 and the shield shell 10 is strengthened.

This application board is in to the board plug ground terminal 30b front end body coupling material bridge 35 makes material bridge integrated into one piece in basal portion 21, simultaneously material bridge 35 horizontal both sides upwards bend form with cover the welded plate 36 of roof 11 contact, make through spot welding welded plate 36 with cover roof 11 welded fastening together, realize ground terminal 30 b's ground connection and strengthen plug body 20's intensity.

This application board is to the board plug through set up fluting 111 on shield shell 10's cover roof 11 form on the metal reinforcement 40 and insert spacing sand grip 45 in the fluting 111 to limit on the direction about the front in the front the plug body, at last with metal reinforcement 40 the main part 41 with shield shell 10's cover roof 11 spot welding is fixed together, realizes accurate location, prevents to appear rocking and shifting between plug body 20 and shield shell 10.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims (10)

1. A board-to-board plug comprises a plurality of signal terminals and ground terminals which are arranged at intervals, a plug body which fixes the signal terminals and the ground terminals into a whole, a cable which is connected with the signal terminals and a shielding shell which covers the plug body, wherein the plug body comprises a base part and an extension part which is formed by extending the base part backwards, the shielding shell comprises a covering top plate which covers the top surface of the plug body, the board-to-board plug is characterized in that the front end of the ground terminal is connected with a material bridge which is formed on the base part, and at least part of the upper surface of the material bridge is in contact with the covering top plate and is welded and fixed together.

2. The board-to-board plug according to claim 1, wherein at least one of the two lateral sides of the material bridge is bent upward to form a welded plate in contact with the cover top board, and the welded plate is welded to the cover top board.

3. The board-to-board plug of claim 2, wherein both lateral sides of the material bridge are bent upward to form welded plates contacting with the top cover plate, the front ends of the signal terminals are integrally connected with the material bridge when the plug body is injection molded, and the connection between the signal terminals and the material bridge is cut off after the plug body is injection molded.

4. The board-to-board plug of claim 3, wherein the connection between the signal terminals and the material bridge is cut by laser cutting and a cut is formed at a corresponding position of the base.

5. The board-to-board plug of claim 1, further comprising a metal reinforcement member, wherein the metal reinforcement member comprises a main body portion formed in the base portion and a rib extending upward from the main body portion, and the cover top board is provided with a slot into which the rib is inserted.

6. The board-to-board plug of claim 5, wherein the main body portion is at least partially exposed on an upper surface of the cover top board, the main body portion is in contact with the cover top board and is welded and fixed together, the slot and the rib each extend in a front-rear direction, a length of the slot in the front-rear direction is equal to a length of the rib, and a guide slope is punched on an outer peripheral edge of a side of the slot facing the plug body.

7. The board-to-board plug of claim 6, wherein the transverse width of said slot is greater than the thickness of said rib, and a pair of resilient protrusions are formed on each of the two transverse sides of said slot and protrude therefrom, respectively, the distance between said pair of resilient protrusions being equal to the thickness of said rib.

8. The board-to-board plug according to claim 7, wherein after the protrusion is engaged in the slot, the slot limits the protrusion in four directions, i.e., front, back, left, and right, to prevent the plug body in which the metal reinforcement is formed from shaking.

9. The board-to-board plug of claim 8, wherein said plug body further includes an island portion formed to project downward from said base portion and a pair of extension arms formed to extend rearward from rear ends of both lateral sides of said extension portion, said island portion includes an island portion main body and reinforcing end portions at both lateral ends of said island portion main body, said metal reinforcing member is formed on said reinforcing end portions to reinforce the strength of said reinforcing end portions, said metal reinforcing member further includes a first reinforcing wall bent downward from said main body portion and covering lateral outer side surfaces of said reinforcing end portions, a second reinforcing wall bent from a bottom end of said first reinforcing wall and covering a bottom surface of said reinforcing end portions, and a pair of third reinforcing walls bent from front and rear sides of said second reinforcing wall and covering front and rear end surfaces of said reinforcing end portions.

10. The board-to-board plug of claim 9, wherein the bottom of the extension protrudes downward to form a protrusion, the rear end of the extension is recessed downward from the top to form a soldering land, the soldering land includes a plurality of soldering grooves corresponding to the signal terminals, the signal terminals and the ground terminals each include a U-shaped contact portion formed outside the island, a holding portion formed by extending rearward from the U-shaped contact portion, and a soldering foot extending rearward from the holding portion to the soldering land, the soldering feet of the signal terminals extend into the soldering grooves to be soldered to the cable, the soldering feet of the ground terminals are covered by the plug body above and form a covering portion, the U-shaped contact portion includes a first contact arm formed on the front end surface of the island, a second contact arm formed on the rear end surface of the island, and a connecting portion connecting the first and second contact arms and formed on the bottom surface of the island, and the signal terminal and the grounding terminal are connected with the material bridge after being bent through the bottom of the first contact arm.

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