CN209880907U

CN209880907U - Positive reverse plug USB socket

Info

Publication number: CN209880907U
Application number: CN201920382330.XU
Authority: CN
Inventors: 张秀华
Original assignee: Shenzhen Everwin Precision Technology Co Ltd
Current assignee: Shenzhen Everwin Precision Technology Co Ltd
Priority date: 2019-03-25
Filing date: 2019-03-25
Publication date: 2019-12-31
Anticipated expiration: 2029-03-25

Abstract

A positive and negative plug USB socket comprises an upper row terminal group, a lower row terminal group, a metal piece arranged between the upper row terminal group and the lower row terminal group, and an insulating body which integrates the upper row terminal group, the lower row terminal group and the metal piece, the insulating body comprises a base part and a butt joint tongue part formed by extending forwards from the base part, each conductive terminal of the upper row and the lower row of terminal sets comprises a holding part formed in the insulating body, a contact part extending forwards from the holding part and exposed out of the upper surface and the lower surface of the butt joint tongue part, and a welding foot extending backwards from the holding part out of the insulating body, the upper and lower rows of terminal sets respectively comprise a first terminal set and a second terminal set which are connected through different material belts, the outer surface of the first terminal group is electroplated with rhodium or rhodium alloy, and the outer surface of the second terminal group is electroplated with copper or copper alloy; the application can reduce the cost.

Description

Positive reverse plug USB socket

Technical Field

The present application relates to the field of electrical connectors, and more particularly, to a USB socket with a positive and negative plug.

Background

The Type C USB connector has been widely used in the electronic field, and due to its small size and complex structure, there are many problems in manufacturing and manufacturing, and the manufacturing cost is also high. A conventional conductive terminal generally includes a holding portion, a contact portion extending forward from the holding portion, and a solder tail extending from another end of the holding portion. In order to prevent the tilting of the end edge of the contact of the terminal from being separated from the insulating body during plugging, the end edge of the contact is generally embedded into the plastic, so that the front part of the terminal is provided with a bending part for embedding into the plastic, but when the bending part is embedded into the plastic, the sealing glue needs the R angle of the bending part matched with the mold for sealing glue during injection molding, the glue easily overflows and easily damages the terminal or causes displacement.

In practical application, some customers have high requirements on the resistance to electrolytic corrosion of the conductive terminals, and usually require electroplating noble metals such as rhodium, ruthenium and the like, and the electroplating cost of the noble metals such as rhodium, ruthenium and the like is very high; the electroplating cost of one terminal is up to the expense of 2 hair, and there are 24 terminals in whole Type C. The customer may not require such high performance for all of the terminals, and only some of the terminals may be required to have such high performance.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a reversible USB socket that can be plated with different metal layers for different terminals.

In order to solve the above technical problem, the present application provides a USB socket with a front-back plug, which includes an upper row terminal set, a lower row terminal set, a metal member disposed between the upper row terminal set and the lower row terminal set, and an insulating body integrally molding the upper row terminal set, the lower row terminal set and the metal member, the insulating body comprises a base part and a butt joint tongue part formed by extending forwards from the base part, each conductive terminal of the upper row and the lower row of terminal sets comprises a holding part formed in the insulating body, a contact part extending forwards from the holding part and exposed out of the upper surface and the lower surface of the butt joint tongue part, and a welding foot extending backwards from the holding part out of the insulating body, the upper and lower rows of terminal sets respectively comprise a first terminal set and a second terminal set which are connected through different material belts, the outer surface of the first terminal set is plated with rhodium or a rhodium alloy, and the outer surface of the second terminal set is plated with copper or a copper alloy.

Preferably, the solder leg of the first terminal group is connected with a first rear material belt, the front end of the contact part of the first terminal group is connected with a first front material belt, the solder leg of the second terminal group is connected with a second rear material belt, and the front end of the contact part of the second terminal group is connected with a second front material belt.

Preferably, the first front material belt and the first rear material belt are bent upward, when the first terminal group is superposed on the second terminal group, the first front material belt is superposed above the second front material belt, the first rear material belt is superposed above the second rear material belt, and at this time, projections of the first terminal group and the second terminal group in the transverse direction are mutually superposed.

Preferably, the first and second terminal sets are stacked and fixed and then injection-molded to form the insulating body, each of the conductive terminals of the first and second terminal sets further includes a front end portion formed at a front end of the contact portion, and the front end portion is bent and extended to form an embedded portion.

Preferably, the insulating body includes a first insulator integrally formed with the upper row of terminal groups, a second insulator integrally formed with the lower row of terminal groups and a metal member, and a third insulator integrally formed with the first and second insulators, the contact portion and the front end portion of the upper row of terminal groups are not embedded in the first insulator, and the front end portion of the lower row of terminal groups is embedded in the second insulator.

Preferably, the second insulator protrudes upward to form a plurality of first bosses and a plurality of second bosses at positions corresponding to the contact portions and the embedding portions of the upper row of terminal sets on one side of the second insulator facing the first insulator, and a plurality of flow gaps are formed between the first bosses and between the second bosses to facilitate the flow of the molten plastic.

Preferably, the upper row terminal set and the first insulator are stacked on the second insulator and then the third insulator is injection molded, lower surfaces of the contact portion and the insertion portion of the upper row terminal set abut against the first boss and the second boss of the second insulator, respectively, and the insertion portion of the upper row terminal set is inserted into the third insulator.

Preferably, the thickness of the front end portion is smaller than that of the contact portion, the front end portion comprises a thinning portion and an embedding portion formed by bending and extending the front end of the thinning portion, a horizontal glue sealing surface is formed above the thinning portion, and during injection molding of the insulation body, the die core assembly is pressed on the glue sealing surface in a forward direction to seal glue.

Preferably, the horizontal position of the glue sealing surface is lower than the upper surface of the contact part, and an inclined surface is formed between the glue sealing surface and the upper surface of the contact part so as to facilitate the plugging and unplugging of the plug terminal.

Preferably, the thickness of the front end portion is between 1/2 and 2/3 of the thickness of the contact portion.

The utility model provides a first terminal group of last lower row terminal group and second terminal group punch respectively and form and connect and stack the back remolding through different material areas, from this, can be respectively right first, second terminal group electroplate different metal levels in order to accord with the customer to the high performance requirement of part terminal, have avoided the high cost of electroplating noble metal to all terminals.

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 front-to-back USB socket according to the present application;

FIG. 2 is an exploded perspective view of the front-to-back USB socket of the present application and a partially enlarged view thereof;

FIG. 3 is an exploded perspective view of the USB socket of the present application with the USB socket inserted in the front and back direction at another angle and a partially enlarged view thereof;

fig. 4 is a perspective view of the conductive terminal connecting to the carrier tape according to the present application;

FIG. 5 is a combination diagram of the first and second terminal sets of the upper row of terminal sets;

fig. 6 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.

Referring to fig. 1 to 3, the front-back-plug USB socket of the present application includes a plurality of conductive terminals, a metal member 40, and an insulating body integrally molding the conductive terminals and the metal member 40;

the conductive terminal comprises an upper row terminal group 20 and a lower row terminal group 30, and the metal piece 40 is arranged between the upper row terminal group 20 and the lower row terminal group 30. The insulating body includes a first insulator 50 formed on the upper row terminal set 20, a second insulator 60 formed on the lower row terminal set 30 and the metal member 40, and a third insulator 10 formed by integrally forming the first and second insulators 50, 60.

The third insulator 10 includes a base 11, a docking tongue 12 extending forward from the base 11, a thickened portion 13 between the docking tongue 12 and the base 11, and a locking groove 14 provided on both lateral sides of the docking tongue 12.

As shown in fig. 4, each of the conductive terminals 20, 30 includes a holding portion 21, a contact portion 22 extending forward from the holding portion 21 and exposed to the upper and lower surfaces of the mating tongue 12, and a solder tail 23 extending backward from the holding portion 21. The upper row terminal set 20 and the lower row terminal set 30 respectively include a first terminal set 201 and a second terminal set 202, the outer surface of the first terminal set 201 is plated with rhodium or a rhodium alloy layer, and the outer surface of the second terminal set 202 is plated with a copper or a copper alloy layer. The soldering foot 23 of the first terminal group 201 is connected with a first rear material strip 2011, the front end edge of the contact portion 22 of the first terminal group 201 is connected with a first front material strip 2012, the first terminal group 201 at least comprises two power terminals 203, and the first terminal group 201 further comprises a pair of signal terminals 204. The solder tails 23 of the second terminal set 202 are connected to a second rear tape 2021, the front end edge of the contact portion 22 of the second terminal set 202 is connected to a second front tape 2022, and the second terminal set 202 at least includes a pair of ground terminals 205 and a plurality of signal terminals (not numbered).

The first terminal group 201 and the second terminal group 202 do not overlap in the vertical direction, and the signal terminals of the first terminal group 201 are preferably a pair of signal terminals 204 between two power supply terminals 203. During injection molding, the first rear material belt 2011 is overlapped above the second rear material belt 2021, the first front material belt 2012 is overlapped above the second front material belt 2022, and the first rear material belt 2011 and the first front material belt 2012 are bent towards the direction far away from the second terminal group 202, so that after the material belts are mutually overlapped, the upper surfaces and the lower surfaces of the first terminal group 201 and the second terminal group 202 are still kept on the same horizontal plane. Injection molding is then performed to form the first insulator 50.

The first and second terminal sets 201, 202 of the lower terminal set 30 have the same structure as the upper terminal set 20, but before injection molding, the first and second terminal sets 201, 202 of the lower terminal set 30 need to be fixed in a mold in cooperation with the metal fitting 40 after being stacked, and then injection molding is performed to form the second insulator 60. Finally, the first insulator 50 and the second insulator 60 are fixed and then injection molded again to form the third insulator 10.

Referring to fig. 2 and 6, the contact portion 22 of each terminal of the upper terminal set 20 and the lower terminal set 30 includes a front end 25. The tip portion 25 is thinned to have a thickness smaller than that of the contact portion 25, and the tip portion 25 includes a thinned portion 252, an insertion portion 251 formed by bending the tip of the thinned portion 252 toward the metal member 40 and extending therefrom, and a bent portion 255 connecting the thinned portion 252 and the insertion portion 251. The upper surface of the embedding portion 251 is an embedding plane 253, the upper surface of the thinning portion 252 forms a horizontal sealing surface 256, an inclined surface 254 is formed between the rear end of the sealing surface 256 and the contact portion 22, and the inclined surface 254 can facilitate plugging and unplugging of the plug terminal and prevent the plugging and unplugging from damaging the terminal. The thickness of the front end portion 25 is between 1/2-2/3 of the thickness of the contact portion 22.

During injection molding, when the lower row terminal set 30 and the metal member 40 are fixed in relative positions to perform injection molding on the second insulator 60, the front end 25 of the lower row terminal set 30 and the second insulator 60 are sealed with glue, and the front end is pressed against the glue sealing surface 256 through a mold core to perform glue sealing. The embedded portion 251 and the bent portion 255 are embedded in the second insulator 60. The second insulator 60 is provided with a plurality of first bosses 61 and second bosses 62 protruding upward at the position of the mating tongue 12 at one side of the metal member 40, the first bosses 61 correspond to the contact portions 22 of each terminal of the upper row of terminal sets 20, and the second bosses 62 correspond to the embedding portions 251 of each terminal of the upper row of terminal sets 20. A plurality of flow gaps are formed between the first bosses 61 and the second bosses 62, each first boss 61 and each second boss 62 corresponds to one conductive terminal, and the flow gaps are convenient for the flow of the molten plastic.

When the upper row terminal set 20 is injection molded into the first insulator 50, the contact portion 22 side of the upper row terminal set 20 is embedded into the first insulator 50 and suspended; when the upper row terminal set 20 is stacked on the second insulator 60, one side of the contact portion of the upper row terminal set 20 abuts against the boss 61 of the second insulator 60, so that the upper row terminal set 20 is prevented from being displaced in the vertical direction to cause product defects when the third insulator 10 is press-molded by high-pressure plastic. When the third insulator 10 is formed, the front end 25 of the upper row terminal set 20 is sealed by glue, and the sealing principle is the same as that of the lower row terminal set 30, which is not described herein again.

The reason why the contact portions 22 of the upper row terminal set 20 are in a suspended state without being sealed is that, in order to facilitate molding of the third insulator 10, the third insulator 10 covers the docking tongue 12 more, preventing the outermost third insulator 10 from failing to hold the first and second insulators 50, 60 stably. The lower row terminal set 30 is molded integrally with the metal member 40 during the first injection molding, and the lower row terminal set 30 needs to be molded in order to fix the relative position between the metal member 40 and the lower row terminal set 30.

In actual production, the metal part 40 may be injection molded, and bosses may be formed at the upper and lower sides of the metal part 40 to abut against the upper and lower rows of terminal sets, respectively.

The utility model provides a bend again and extend and form embedding portion 251 after positive plug USB socket's conductive terminal's front end portion 25 claps thinly the portion 25 top of clapping forms horizontally and seals gluey face 256, through the direct positive crimping of mould benevolence subassembly seal gluey face 256 and glue, avoid crushing the terminal. Meanwhile, the first terminal group 201 and the second terminal group 202 of the upper and lower terminal groups 20 and 30 of the present application are respectively formed by stamping and are connected through different material strips and are formed by stacking, so that different metal layers can be electroplated on the first and second terminal groups 201 and 202 respectively to meet the high performance requirements of customers on part of terminals, and the high cost of electroplating precious metals on all terminals is avoided.

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

1. A positive and negative plug USB socket comprises an upper row terminal group, a lower row terminal group, a metal piece arranged between the upper row terminal group and the lower row terminal group, and an insulating body which integrates the upper row terminal group, the lower row terminal group and the metal piece, the insulating body comprises a base part and a butt joint tongue part formed by extending forwards from the base part, each conductive terminal of the upper row and the lower row of terminal sets comprises a holding part formed in the insulating body, a contact part extending forwards from the holding part and exposed out of the upper surface and the lower surface of the butt joint tongue part, and a welding foot extending backwards from the holding part out of the insulating body, it is characterized in that the upper row terminal group and the lower row terminal group respectively comprise a first terminal group and a second terminal group which are connected through different material belts, the outer surface of the first terminal set is plated with rhodium or a rhodium alloy, and the outer surface of the second terminal set is plated with copper or a copper alloy.

2. The reversible USB socket of claim 1, wherein the solder tails of the first terminal set are connected to a first rear tape, the front ends of the contact portions of the first terminal set are connected to a first front tape, the solder tails of the second terminal set are connected to a second rear tape, and the front ends of the contact portions of the second terminal set are connected to a second front tape.

3. The reversible USB socket according to claim 2, wherein the first front tape and the first rear tape are bent upward, and when the first terminal set is superimposed on the second terminal set, the first front tape is superimposed on the second front tape, and the first rear tape is superimposed on the second rear tape, and when the first terminal set and the second terminal set are projected in the transverse direction, the first terminal set and the second terminal set overlap each other.

4. The reversible USB socket of claim 3, wherein the first and second terminal sets are stacked and fixed and then injection molded to form the insulating body, each of the conductive terminals of the first and second terminal sets further includes a front end portion formed at a front end of the contact portion, and the front end portion is bent and extended to form the insertion portion.

5. The reversible USB socket of claim 4, wherein the insulating body comprises a first insulator integrally formed with the upper row of terminal sets, a second insulator integrally formed with the lower row of terminal sets and a metal member, and a third insulator integrally formed with the first and second insulators, wherein the contact portions and the front end portions of the upper row of terminal sets are not embedded in the first insulator, and the front end portions of the lower row of terminal sets are embedded in the second insulator.

6. The reversible USB socket of claim 5, wherein the second insulator has a plurality of first bosses and second bosses protruding upward from the first insulator at positions corresponding to the contact portions and the insertion portions of the upper row of terminal sets, and a plurality of flow gaps are formed between the first bosses and between the second bosses to facilitate the flow of the molten plastic.

7. The reversible USB socket according to claim 6, wherein the upper row terminal set and the first insulator are stacked on the second insulator and then the third insulator is injection molded, the lower surfaces of the contact portion and the insertion portion of the upper row terminal set abut against the first boss and the second boss of the second insulator, respectively, and the insertion portion of the upper row terminal set is inserted into the third insulator.

8. The USB socket as claimed in claim 7, wherein the front portion has a thickness smaller than the contact portion, the front portion includes a thinning portion and an embedding portion formed by bending and extending the front end of the thinning portion, a horizontal sealing surface is formed above the thinning portion, and the mold insert assembly is pressed against the sealing surface by a forward pressure to seal the insulation body during injection molding.

9. The positive-reverse-plugging USB socket according to claim 8, wherein the glue sealing surface has a horizontal position lower than the upper surface of the contact portion, and an inclined surface is formed between the glue sealing surface and the upper surface of the contact portion to facilitate plugging and unplugging of the plug terminal.

10. The reversible USB socket of claim 5, wherein the thickness of the front end is between 1/2 and 2/3 of the thickness of the contact.