CN111585074A - Plug terminal and line pair board plug - Google Patents

Abstract

A plug terminal comprises a connecting part and a plugging part formed by bending the connecting part, wherein the connecting part comprises a substrate, a pair of coating side walls formed by bending the two transverse sides of the substrate downwards and a pair of coating end walls formed by oppositely bending the front end and the rear end of the pair of coating side walls, the substrate, the coating side walls and the coating end walls are enclosed to form a tin containing space, and at least one wire clamp groove is formed in the coating end walls. The application is suitable for connection of extremely small conductive wires.

Description

Plug terminal and line pair board plug

Technical Field

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

Background

According to part of customer reactions, in some application fields, the connection between the line boards is directly connected in a mode that an enameled wire (the wire diameter is about 0.2-0.3mm) is directly welded on a printed circuit board, and the technical problems that plugging and unplugging cannot be achieved and the assembly efficiency is low exist in the scheme. Aiming at the technology, firstly, a wire-to-board connector which can be plugged and pulled and improves the assembly efficiency is urgently needed, and the wire distance is required to be not more than 0.8mm, and the height is required to be less than 1.8 mm.

Disclosure of Invention

Accordingly, there is a need for a plug terminal and a wire-to-board plug that can solve the problems of low manufacturing efficiency, inability to be attached and detached, and easy mis-soldering caused by directly soldering a very small conductive wire to a printed circuit board.

In order to solve the technical problem, the application provides a plug terminal, including the line portion and certainly the grafting portion that line portion bent the formation, line portion includes the base plate, certainly a pair of cladding lateral wall that the horizontal both sides of base plate bent the formation downwards and from a pair of the cladding end wall that both ends bent the formation relatively around the cladding lateral wall, base plate, cladding lateral wall and cladding end wall enclose to establish one and hold the tin space, be equipped with at least one wire clamp groove on the cladding end wall.

Preferably, the front end and the rear end of each of the pair of coated side walls are bent oppositely, and the two coated end walls formed by bending the corresponding coated side walls are butted with each other to form a complete coated end wall.

Preferably, the wire clamp groove comprises a wire clamping opening close to one side of the substrate and a limiting protrusion located below the wire clamping opening, and the transverse width of the wire clamping opening is greater than the width of the wire clamping opening.

Preferably, the wire clamp groove is formed by splicing a concave part and a convex part which are respectively arranged at corresponding positions of a pair of mutually butted cladding end walls.

Preferably, the connecting portion is used for electrically connecting a conductive wire, the conductive wire includes a core wire and an insulating layer coated outside the core wire, and the core wire is clamped into the wire clamping opening of the wire clamp groove and is limited by the limiting protrusion.

Preferably, the wire clamp grooves are formed in the coated end walls at the front end and the rear end, at least two core wires are clamped into the wire clamp grooves, and the core wires are partially positioned in the tin containing space and are welded and fixed in the tin containing space through soldering tin.

Preferably, the insertion part includes a main body portion formed by bending downward from the front end of the substrate, a pair of extension arms formed by bending forward from two lateral sides of the main body portion, and a pair of contact arms formed by bending and extending in opposite directions from the top of the extension arms, a gap is formed between the pair of contact arms, and the gap between the front ends of the pair of contact arms is greater than the gap between the rear ends of the pair of contact arms.

Preferably, the pair of contact arms includes elastic arm portions bent from the top of the extension arm toward each other, guide end portions bent from the top of the elastic arm portions toward the lateral outer side, and contact portions formed at the junctions of the guide end portions and the elastic arm portions, and a gap between the front ends of the pair of guide end portions is larger than a gap between the rear ends of the pair of guide end portions.

In order to solve the technical problem, the present application further provides a wire-to-board plug, which comprises a plug body, a plug terminal assembled in the plug body, and a conductive wire connected to the plug terminal, wherein the plug body comprises a top plate, a pair of side plates, an insertion end portion, a tail portion and a plug terminal groove, the plug terminal groove comprises a first terminal groove located at the front end, a second terminal groove located at the rear end of the first terminal groove, a limiting block located between the first terminal groove and the second terminal groove, and a through groove formed by the top plate and extending backwards from the front end of the insertion end portion, the through groove is located above the first terminal groove and is formed with an avoiding opening, the width of the avoiding opening is greater than that of the through groove, the plug terminal comprises a connecting wire portion fixed in the second terminal groove and a plugging portion fixed in the first terminal groove and formed by bending the connecting wire portion, the connecting portion comprises a wire clamp groove for clamping the conductive wire and a tin containing space, the inserting portion comprises a pair of extension arms and a pair of contact arms formed by extending the tops of the extension arms in opposite directions, and the front side of the top ends of the contact arms is located in the avoiding opening and staggered in the front-back direction to penetrate the groove.

Preferably, an abutting convex portion is formed on an insertion end portion of the front side of the first terminal groove, a limiting groove is formed between the abutting convex portion and two lateral walls of the first terminal groove, and a limiting end portion inserted into the limiting groove is formed at the front end of the pair of extending arms.

Preferably, the pair of contact arms includes elastic arm portions respectively formed by bending the top portions of the extension arms toward each other, guide end portions formed by bending the top portions of the elastic arm portions toward the lateral outer side, and contact portions formed at joints between the guide end portions and the elastic arm portions, a gap between front ends of the pair of guide end portions is larger than a gap between rear ends of the pair of guide end portions, and the pair of guide end portions are located in the escape openings and are displaced from the insertion grooves in the front-rear direction.

Preferably, the connecting portion further comprises a substrate, a pair of cladding side walls formed by downwards bending two transverse sides of the substrate and a pair of cladding end walls formed by oppositely bending the front ends and the rear ends of the cladding side walls, the tin containing space is formed by surrounding the substrate, the cladding side walls and the cladding end walls, the wire clamp groove is formed in the cladding end walls, and the conductive wire is clamped into the wire clamp groove and is partially located in the tin containing space and is welded and fixed.

According to the plug terminal, the connection part and the insertion part of the plug terminal are designed, so that the extremely small conductive wire can be easily welded and fixed in the plug terminal and can be electrically butted with a wire-to-board socket attached to a factor circuit board, and the technical problems that the existing extremely small conductive wire cannot be directly welded on a printed circuit board to cause plugging and unplugging and low manufacturing efficiency are solved.

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.

Fig. 1 is a perspective view of a wire-to-board connector assembly of the present application;

FIG. 2 is a perspective view of the wire-to-board socket of the present application;

FIG. 3 is an exploded perspective view of the wire-to-board socket of the present application;

FIG. 4 is a perspective view of a socket body of the wire-to-board socket of the present application;

FIG. 5 is a perspective view of the receptacle terminal of the wire-to-board receptacle of the present application;

FIG. 6 is a perspective view of a wire-to-plate plug of the present application;

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

FIG. 8 is a perspective view of another angle of the wire-to-plate plug of the present application;

fig. 9 is a perspective view of a plug terminal of the present application;

figure 10 is a perspective view of another angle of the plug terminal of the present application;

FIG. 11 is a combination view of a plug terminal and a conductive wire of the present application;

fig. 12 is a sectional view taken along the broken line a-a shown in fig. 1.

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.

The direction of the present application defines the X direction shown in fig. 1 as the front (or longitudinal direction) in the front-rear direction, the Y direction as the right (or lateral direction) in the left-right direction, and the Z direction as the up-down direction (or vertical direction).

Referring to fig. 1, the wire-to-board connector assembly of the present application includes a socket a and a plug B inserted into the socket a.

Referring to fig. 2 to 5, the wire-to-board socket a includes a socket body 10, a socket terminal 20 inserted into the socket body 10, and a fixing member 30 fixed in the socket body 10.

The socket body 10 includes a top wall 11, a bottom wall 12, a rear wall 14, a pair of side walls 13 connecting the top wall 11 and the bottom wall 12, and a plug cavity 15. The rear end of the plugging cavity 15 is opened to form an insertion opening, the rear wall 14 is formed with a socket terminal groove 16 penetrating from front to rear, and the socket terminal groove 16 includes an upper groove 161, a lower groove 162, and a beam 163 located between the upper groove 161 and the lower groove 162 and connected to two lateral walls of the socket terminal groove 16. The upper groove 161 extends from the upper portion of the rear wall 14 to a portion of the lower surface of the top wall 11, and forms a groove structure on the lower surface of the top wall 11 (the upper surface of the plug cavity 15).

The inner sides of the two lateral side walls 13 of the inserting cavity 15 are provided with a clamping groove 17, and the clamping groove 17 comprises a guide portion 171, a protruding portion 172 located in front of the guide portion 171, and a buckling portion 173 located at the front end of the protruding portion 172. The sidewall 13 is further opened with a fixing groove 18, the fixing groove 18 includes an upper fixing groove 181, a lower fixing groove 182, and a partition 183 separating the upper fixing groove 181 and the lower fixing groove 182, and a lower end of the lower fixing groove 182 is opened to face a printed circuit board (not shown).

The receptacle terminal 20 includes a base portion 21, a blade contact portion 22 formed to extend rearward from the top of the base portion 21, a solder tail 23 formed at the bottom of the base portion 21, and a fixing tail 24 formed to extend rearward from the middle of the base portion 21. The free end lower portion of the blade contact portion 22 is provided with an inclined portion 25. The blade contact portion 22 is inserted into the upper groove 161 and the top of the blade contact portion 22 is at least partially retained in the groove structure of the lower surface of the top wall 11. The fixing leg 24 is inserted into the lower groove 162 to fix the socket terminal 20, and a supporting space 26 supported by the front end of the beam 163 is formed between the fixing leg 24 and the blade contact portion 22. The fixing feet 24 are located in the rear wall 14 and do not extend back into the plug cavity 15.

The fixing member 30 includes a fixing arm 32 inserted into the upper fixing groove 181, a welding arm 33 inserted into the lower fixing groove 182, and a connecting arm 31 connecting the fixing arm 32 and the welding arm 33. A holding space 34 for holding the partition 183 is formed between the fixing arm 32 and the welding arm 33. The soldering arm 33 is soldered to the printed circuit board.

Referring to fig. 6 to 11, the wire-to-plate plug B of the present application includes a plug body 40, a plug terminal 50 assembled in the plug body 40, and a conductive wire 60 connected to the plug terminal 50.

Referring to fig. 6 and 7, the plug body 40 includes a top plate 41, a pair of side plates 43, an insertion end 42, a tail 45, and a plug terminal groove 46. A pair of latch blocks 44 are formed at lateral outer sides of the pair of side plates 43, fixing grooves 441 are formed at bottom surfaces of the latch blocks 44, and arc-shaped end surfaces 442 are formed at front ends of the latch blocks 44.

The plug terminal groove 46 has an opening at a lower end, and the plug terminal groove 46 includes a first terminal groove 461 located at a front end, a second terminal groove 462 located at a rear end of the first terminal groove 461, a stopper 464 located between the first terminal groove 461 and the second terminal groove 462, and a through groove 466 opened rearward on a front end of the insertion end 42. The through groove 466 penetrates through the top plate 41 in the vertical direction to communicate with the first and second terminal grooves 461, 462, and forms an avoiding opening 467 at a position corresponding to the first terminal groove 461, wherein the avoiding opening 467 is formed by widening at a position of the top plate 41 above the first terminal groove 461. A plurality of conductive wire grooves 47 corresponding to the plug terminal grooves 46 one to one are formed on the bottom surface of the tail portion 45.

Referring to fig. 9 to 11, the plug terminal 50 includes a connecting portion 51 fixed in the second terminal groove 462 and a mating portion 52 extending forward from the connecting portion 51. The connecting portion 51 includes a substrate 511, a pair of coated sidewalls 512 bent downward from both lateral sides of the substrate 511, a coated end wall 513 bent from front and rear ends of the coated sidewall 512, and a tin containing space 53 surrounded by the substrate 511, the coated sidewalls 512, and the coated end wall 513. Two coated end walls 513 formed by bending the coated side walls 512 on the left and right sides are butted with each other, a wire clip groove 54 is formed above the joint of the pair of coated end walls 512, and the wire clip groove 54 is formed at both the front and rear ends of the tin containing space 53. The wire clip groove 54 includes a wire clamping opening 541 and a limiting protrusion 542 located at an opening at a lower end of the wire clamping opening 541. The wire clamp groove 54 is formed by splicing a pair of mutually butted cladding end walls 512 at corresponding positions with a concave part and a convex part.

The socket 52 includes a main body 521 formed by bending the front end of the substrate 511 downward, a pair of extension arms 522 formed by bending and extending forward from two lateral sides of the main body 521, and a pair of contact arms 523 formed by extending upward and obliquely from the top of the pair of extension arms 522. The contact arm 523 includes an elastic arm portion 5231 extending obliquely from the top of the extension arm 522, a guide end portion 5233 bent laterally outward from the top of the elastic arm portion 5231, and a contact portion 5232 formed at the junction between the elastic arm portion 5231 and the guide end portion 5233. The width between the front ends of the pair of contact arms 523 is greater than the width between the rear ends of the pair of contact arms 523 to facilitate insertion of the blade contact portions 22 of the receptacle a from the front ends.

The conductive wire 60 includes a core wire 61 and an insulating varnish or insulating plastic 62 coated outside the core wire 61. The core wire 61 of the conductive wire 60 is pressed into the wire clamping groove 54 of the coated end wall 513 from bottom to top, the core wire 61 is accommodated in the wire clamping opening 541 and limited by the limiting protrusion 542, and the wire clamping grooves 54 at the front side and the rear side fix the conductive wire 60, so that the situation that one end of the conductive wire 60 is tilted can be prevented. Then, solder is soldered in the solder receiving space 53 to solder and fix the core wire 61 in the solder receiving space 53.

As shown in fig. 6 and 8, the plug terminal 50 is installed into the plug terminal slot 46 from bottom to top, wherein the connecting portion 52 is fixed in the second terminal slot 462, the inserting portion 51 is fixed in the first terminal slot 461, and top portions of the pair of contact arms 523 abut against two lateral sides of the avoiding opening 467 and do not exceed a surface of the top plate 41. The leading ends of the leading ends 5233 of the pair of contact arms 523 are located within the escape aperture 467 and do not extend beyond the through slots 466 located at the insertion end 42 to avoid damaging the leading ends 5233 when the blade contact 22 is inserted. Meanwhile, as shown in fig. 7 and fig. 9, the insertion end 42 is located in the middle of the side surface of the first terminal groove 461 and protrudes toward the first terminal groove 461 to form a supporting protrusion 465, and a limiting groove 469 is formed between the supporting protrusion 465 and the lateral side wall of the first terminal groove 461; the front ends of the pair of extension arms 522 of the plug terminal 50 are protruded to form limit end portions 5221 inserted into the limit grooves 469 for limiting. The front end of the contact arm 523 can be further limited by the limit end 5221 to be located in the avoiding port 467 and not enter the through groove 466 in the front-back direction to avoid being damaged by the blade contact portion 22.

After the plug terminal 50 is installed in the plug body 40, the conductive wire 60 is clamped into the connecting portion 51 of the plug terminal 50 for welding and fixing, and the conductive wire 60 is clamped into the conductive wire groove 47 at the tail portion for limiting.

As shown in fig. 1, fig. 2 and fig. 12, the plug B is inserted into the insertion cavity 15 of the socket a, the blade contact portion 22 of the socket terminal 20 is inserted between the pair of contact arms 523 along the through groove 466 and is clamped by the pair of contact portions 5232 to generate electrical contact, the latch 44 of the plug body 40 moves along the slot 17 of the socket body 10, and finally the fixing groove 441 is clamped on the protrusion 172 to achieve locking.

According to the design of the connecting portion 51 and the inserting portion 52 of the plug terminal 50, the conducting wire 60 can be easily welded and fixed in the plug terminal 50 and can be electrically butted with the socket terminal 20, and the technical problems that the existing tiny conducting wire cannot be plugged and pulled out and is low in manufacturing efficiency due to the fact that the tiny conducting wire is directly welded on a printed circuit board are solved.

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 (12)

1. The plug terminal is characterized in that the connecting part comprises a substrate, a pair of coating side walls formed by bending downwards from two transverse sides of the substrate and coating end walls formed by oppositely bending the front ends and the rear ends of the pair of coating side walls, a tin containing space is formed by enclosing the substrate, the coating side walls and the coating end walls, and at least one wire clamp groove is formed in the coating end walls.

2. The plug terminal of claim 1, wherein the front and rear ends of a pair of said coated sidewalls are bent toward each other, and the two coated end walls formed by bending the corresponding coated sidewalls are butted against each other to form a complete coated end wall.

3. The plug terminal of claim 2, wherein the wire trap groove comprises a wire trap opening near one side of the substrate and a limit protrusion below the wire trap opening, and the transverse width of the wire trap opening is greater than the width of the wire trap opening.

4. The plug terminal of claim 3, wherein the wire trap grooves are formed by mating recesses and projections at positions corresponding to the pair of opposite coated end walls.

5. The plug terminal according to claim 3 or 4, wherein the connecting portion is used for electrically connecting a conductive wire, the conductive wire includes a core wire and an insulating layer coated outside the core wire, and the core wire is clamped into the wire clamping opening of the wire clamp groove and is limited by the limiting protrusion.

6. The plug terminal according to claim 5, wherein the coated end walls at the front and rear ends are provided with the wire clamp grooves, the core wire is clamped into the wire clamp grooves at least at two positions, and the core wire is partially positioned in the tin accommodating space and is fixed in the tin accommodating space by soldering tin.

7. The plug terminal of claim 1, wherein the mating portion includes a body portion bent downward from the front end of the substrate, a pair of extension arms bent forward from two lateral sides of the body portion, and a pair of contact arms bent in opposite directions from the top of the extension arms, a gap is formed between the pair of contact arms, and the gap between the front ends of the pair of contact arms is larger than the gap between the rear ends of the pair of contact arms.

8. The plug terminal according to claim 7, wherein the pair of contact arms include elastic arm portions bent toward each other from a top of the extension arm, guide end portions bent laterally outward from a top of the elastic arm portions, and contact portions formed at junctions of the guide end portions and the elastic arm portions, respectively, and a gap between front ends of the pair of guide end portions is larger than a gap between rear ends of the pair of guide end portions.

9. A wire-to-board plug comprises a plug body, a plug terminal assembled in the plug body and a conductive wire connected to the plug terminal, and is characterized in that the plug body comprises a top plate, a pair of side plates, an insertion end part, a tail part and a plug terminal groove, the plug terminal groove comprises a first terminal groove positioned at the front end, a second terminal groove positioned at the rear end of the first terminal groove, a limiting block positioned between the first terminal groove and the second terminal groove, and a through groove formed along the top plate from the upper side of the front end of the insertion end part to the rear side, an avoiding opening is formed above the first terminal groove, the width of the avoiding opening is larger than that of the through groove, the plug terminal comprises a connecting wire part fixed in the second terminal groove and a plugging part formed by bending the connecting wire part and fixed in the first terminal groove, the connecting portion comprises a wire clamp groove for clamping the conductive wire and a tin containing space, the inserting portion comprises a pair of extension arms and a pair of contact arms formed by extending the tops of the extension arms in opposite directions, and the front side of the top ends of the contact arms is located in the avoiding opening and staggered in the front-back direction to penetrate the groove.

10. The wire-to-board plug according to claim 9, wherein an abutting protrusion is formed on an insertion end portion of a front side of the first terminal groove, a stopper groove is formed between the abutting protrusion and both lateral walls of the first terminal groove, and a stopper end portion inserted into the stopper groove is formed at a front end of the pair of extension arms.

11. The pair of board-to-board plugs according to claim 10, wherein the pair of contact arms includes an elastic arm portion formed by bending the top of the extension arm toward each other, a leading end portion formed by bending the top of the elastic arm portion toward the laterally outer side, and a contact portion formed at a junction of the leading end portion and the elastic arm portion, a gap between front ends of the pair of leading end portions is larger than a gap between rear ends of the pair of leading end portions, and the pair of leading end portions are located in the relief opening and are offset from the through groove in the front-rear direction.

12. The pair of wire board plugs according to claim 11, wherein the connecting portion further includes a substrate, a pair of cladding sidewalls bent downward from two lateral sides of the substrate, and cladding end walls bent from two front and rear ends of the pair of cladding sidewalls, the tin accommodating space is defined by the substrate, the cladding sidewalls, and the cladding end walls, the wire clamp groove is formed on the cladding end walls, and the conductive wire is clamped into the wire clamp groove and partially positioned in the tin accommodating space and is welded and fixed.

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