CN111384626A - Electrical connector - Google Patents

Abstract

The invention provides an electric connector, comprising a conductive terminal group; the insulating body is provided with a butt joint groove, the conductive terminal group is at least partially accommodated in the insulating body, and the conductive terminal group is provided with a contact part positioned in the butt joint groove; the metal inner shell is sleeved outside the insulating main body; the metal outer shell is sleeved outside the metal inner shell; the metal inner shell comprises an upper shell, a lower shell located below the upper shell and two side shells connected with the upper shell and the lower shell, and the upper shell and the lower shell are of hollow structures. The electric connector is simple to assemble, saves cost, can effectively prevent short circuit between the conductive terminal and the metal inner shell, and improves the reliability of products.

Description

Electrical connector

Technical Field

The present invention relates to an electrical connector, and more particularly, to an electrical connector with high reliability.

Background

With the wide application of electronic devices and the demand of people for fast data transmission, the electrical connector on the electronic device needs to stably operate at high frequency, and therefore, how to realize simple assembly of the electrical connector and reliably transmit high-frequency signals is one of the problems that needs to be solved urgently.

Chinese patent CN104362459B discloses an electrical connector. As shown in fig. 1, the electrical connector 100 includes an insulating body 10, a metal sheet 20, two terminal modules 30, two insulating sheets 40 (mylar sheets), an internal circuit board 50, an internal metal housing 60, an external metal housing 70 and cables (not shown); the insulating body 10 includes a top portion and a bottom portion, and a first concave portion and a second concave portion 132 are respectively disposed on the top and bottom surfaces; the top and the bottom are respectively provided with a plurality of through holes and terminal grooves, and the terminal grooves are respectively communicated with the second concave part 132; the two insulation sheets 40 are accommodated in the second concave portion 132 of the insulation body 10 one by one, and cover the outside of the terminal slot, so as to limit the moving range of the contact portion of the conductive terminal. As can be seen, in order to prevent short circuit between the conductive terminals and the inner metal housing 60, the insulation sheet 40 needs to be mounted on the insulation body 10.

However, the internal structure space of the electric connector is narrow, so that the operation is complex in the assembling process; moreover, after assembly, the insulating sheet of the electrical connector is easy to loosen or fall off during plugging, resulting in short circuit between the conductive terminal and the inner metal shell or the outer metal shell.

Disclosure of Invention

In order to solve the above technical problems, the present invention provides an electrical connector, which is simple to assemble and cost-effective, and can effectively prevent short circuit between a conductive terminal and a metal inner housing, thereby improving reliability of the product.

In order to achieve the above object, the present invention provides an electrical connector comprising:

a conductive terminal set;

the insulating body is provided with a butt joint groove, the conductive terminal group is at least partially accommodated in the insulating body, and the conductive terminal group is provided with a contact part positioned in the butt joint groove;

the metal inner shell is sleeved outside the insulating main body;

the metal outer shell is sleeved outside the metal inner shell;

the metal inner shell comprises an upper shell, a lower shell located below the upper shell and two side shells connected with the upper shell and the lower shell, and the upper shell and the lower shell are of hollow structures.

The electrical connector is characterized in that the hollow structure is a closed annular structure or a U-shaped structure with one open side.

The electrical connector further comprises a built-in circuit board connected with the conductive terminal set, the built-in circuit board is provided with a protruding portion, one end of the left end and the right end of the protruding portion is provided with a chamfer, the other end of the protruding portion is provided with a right angle, the rear end of the insulating main body is provided with an accommodating groove into which the protruding portion is inserted, and the accommodating groove and the protruding portion are in the same shape.

In the above electrical connector, the conductive terminal group is manufactured by a blanking process and includes the power terminal, the ground terminal and the signal terminal, and the thicknesses of the power terminal and the ground terminal are greater than the thickness of the signal terminal.

In the above electrical connector, each of the power terminal, the ground terminal and the signal terminal includes a contact portion, a fixing portion and a welding portion, and a thickness of the contact portion of the power terminal and the ground terminal is smaller than a thickness of the fixing portion and/or the welding portion of the power terminal and the ground terminal.

In the above electrical connector, the insulating body further includes an upper wall and a lower wall, the hollow structure has a pair of side arms spaced apart from each other in the left-right direction and a front arm connecting front ends of the side arms, and the upper wall and the lower wall of the insulating body are provided with grooves for accommodating the side arms and the front arm.

In the above electrical connector, the hollow structure further has a rear arm connecting rear ends of the pair of side arms.

In the electrical connector, the two side shells of the metal inner shell further include a latch arm disconnected from the upper shell and the lower shell, the front end of the latch arm has a hook part located in the butt-joint groove, and slots for accommodating the latch arm are formed in two sides of the insulating main body.

In the electrical connector, the latch arm and the two side housings are integrally formed.

In the electrical connector, the metal inner shell further comprises extension clamping plates, the extension clamping plates are arranged on two sides of the rear end of the metal inner shell, and the extension clamping plates are provided with openings.

In the electrical connector, the metal inner shell further includes a contact spring, the contact spring extends forward from the front arm, and a thickness of the contact spring is smaller than a thickness of the upper shell and a thickness of the lower shell.

In the electrical connector, the metal inner shell is of an integrated structure or formed by splicing two half shells left and right.

The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.

Drawings

Fig. 1 is a schematic structural diagram of a conventional electrical connector;

FIG. 2 is a schematic structural diagram of an electrical connector according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a printed circuit board according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a conductive terminal set according to an embodiment of the invention;

FIG. 5A is a schematic structural diagram of an insulating body according to an embodiment of the present invention;

FIG. 5B is a schematic view of another perspective of an insulating body according to an embodiment of the present invention;

FIG. 6A is a schematic structural diagram of a metal inner shell according to an embodiment of the present invention;

FIG. 6B is a schematic structural diagram of a metal inner shell according to another embodiment of the present invention;

fig. 6C is a schematic structural diagram of a metal inner shell according to another embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a metal housing according to an embodiment of the invention.

Wherein, the reference numbers:

100. 200: electrical connector

10: the insulating body 20: metal sheet

30: the terminal module 40: insulating sheet

50: built-in circuit board 60: inner metal shell

70: outer metal housing 132: second concave part

210: built-in circuit board 211: plate body

212: conductive sheet 213: projection part

214: chamfering

220: conductive terminal group 221: power supply terminal

222: the ground terminal 223: signal terminal

224: contact portion 225: fixing part

226: welding part 227: gap

230: insulating body 231: upper wall

232: lower wall 233: side wall

234: positioning buckle 235: terminal groove

236: housing groove 237: narrow slot

238: butt joint groove 239: groove

240: inner metal shell 2401: first half shell

2402: second case half 241: upper shell

242: the lower case 243: side casing

244: positioning hole 245: contact spring

246: latch arm 247: extension splint

248: opening 249: hollow structure

2491: side arm 2492: front arm

2493: rear arm

250: the metal housing 251: locating slot

252: tail 253: opening of the container

Detailed Description

The invention will be described in detail with reference to the following drawings, which are provided for illustration purposes and the like:

fig. 2 is a schematic structural diagram of an electrical connector according to an embodiment of the invention. As shown in fig. 2, the electrical connector 200 is a usb type-C plug connector, which includes a built-in circuit board 210, a conductive terminal set 220, an insulating body 230, an inner metal shell 240, and an outer metal shell 250. The internal circuit board 210 is electrically connected to the conductive terminal set 220 and is accommodated in the insulating main body 230, the metal inner shell 240 is disposed outside the insulating main body 230, and the metal outer shell 250 is disposed outside the metal inner shell 240. The electrical connector 200 further includes a cable electrically connected to the built-in circuit board 210, which is not shown for convenience of illustration.

Fig. 3 is a schematic structural diagram of a built-in circuit board according to an embodiment of the invention. As shown in fig. 2 to 3, the built-in circuit board 210 includes a board body 211 and conductive sheets 212 horizontally arranged, wherein the conductive sheets 212 are disposed on the upper and lower surfaces of the board body 211 and are welded to the conductive terminal group 220; the rear end of the built-in circuit board 210 is used for connecting a cable (not shown) so that the cable is electrically connected with the conductive terminal set 220, the front end of the built-in circuit board 210 is further formed with a protrusion 213, one of the left and right ends of the front end of the protrusion 213 is formed with a chamfer 214, and the other end is formed with a right angle 215, so that the left and right ends of the protrusion 213 are asymmetrical, thereby preventing the built-in circuit board 210 from being reversely inserted into the insulating main body 230. The right angle 215 may be another angle different from the angle of the chamfer 214, so that the left and right ends of the protrusion 213 are not symmetrical, which is not limited in the present invention.

Fig. 4 is a schematic structural diagram of a conductive terminal set according to an embodiment of the invention. As shown in fig. 2 to 4, the conductive terminal group 220 includes at least one power terminal 221, at least one ground terminal 222, and a plurality of signal terminals 223, the power terminal 221 and the ground terminal 222 are respectively disposed at both sides of the conductive terminal group 220, and the signal terminals 223 are disposed between the power terminal 221 and the ground terminal 222. Of course, the power terminal 221 and/or the ground terminal 222 may be disposed in the middle of the conductive terminal group 220, and the power terminal 221 and/or the ground terminal 222 may be disposed in parallel and crossed with the signal terminal 223.

As shown in fig. 4, each terminal of the conductive terminal set 222 of the present invention is a vertical sheet, and is formed by a blanking process, so as to reduce elastic deformation and increase a mating force. Each terminal includes a contact portion 224, a fixing portion 225, and a soldering portion 226. The contact portion 224 is an arc-shaped structure, and the thickness of the contact portion 224 is smaller than the thickness of the fixing portion 225 and the welding portion 226; the inner side of the fixing part 225 of the signal terminal 223 is provided with a notch for improving the integrity of the signal transmitted by the signal terminal 223; the rear end of the soldering portion 226 is formed with a notch 227, the notch 227 is used for allowing the built-in circuit board 210 to be inserted, i.e. the conductive terminal set 220 clamps the built-in circuit board 210, and the soldering portion 226 is soldered to the corresponding conductive sheet 212 on the built-in circuit board 210. In addition, in the present embodiment, the thickness of the power terminal 221 and the ground terminal 222 is greater than that of the signal terminal 223, so as to transmit a larger current.

FIG. 5A is a schematic structural diagram of an insulating body according to an embodiment of the present invention; fig. 5B is a schematic structural diagram of an insulating body according to another view of the embodiment of the invention. As shown in fig. 2 to 5A and 5B, the insulative body 230 includes an upper wall 231, a lower wall 232, two sidewalls 233 connecting the upper wall 231 and the lower wall 232, and a docking slot 238 formed between the upper wall 231, the lower wall 232 and the sidewalls 231, the docking slot 238 is used for inserting a docking connector, and the insulative body 230 is manufactured by an integral molding process. The outer surfaces of the upper wall 231 and the lower wall 232 are formed with one or more positioning buckles 234, and the invention is exemplified by the positioning buckles 234 formed on both the upper wall 231 and the lower wall 232, but not limited thereto. A plurality of terminal grooves 235 communicating with the mating grooves 238 are formed in the inner side surfaces of the upper wall 231 and the lower wall 232, the terminal grooves 235 are concave grooves, and the terminal grooves 235 correspond to the power supply terminal 221, the ground terminal 222, and the signal terminal 223; the side walls 233 are formed with slots 237, respectively. The rear end of the insulating body 230 is further provided with a receiving groove 236 for receiving the built-in circuit board 210 and the conductive terminal set 220 to be inserted, and the receiving groove 236 is matched with the chamfer 214 of the built-in circuit board 210 for use, so that the built-in circuit board 210 can be prevented from being reversely inserted; after the built-in circuit board 210 and the conductive terminal group 220 are inserted into the insulating body 240, the power terminal 221, the ground terminal 222, and the signal terminal 223 of the conductive terminal group 220 are inserted into the corresponding terminal grooves 235, respectively. The contact portion 224 of each terminal is inserted into the corresponding terminal groove 235, the fixing portion 225, the soldering portion 226 and the protrusion 213 of the built-in circuit board 210 are inserted into the corresponding receiving groove 236, and the shape of the receiving groove 236 is matched with that of the protrusion 213.

Fig. 6A is a schematic structural diagram of a metal inner shell according to an embodiment of the invention. As shown in fig. 2 to 6A, the metal inner shell 240 includes an upper shell 241, a lower shell 242, and two side shells 243 connecting the upper shell 241 and the lower shell 242, and the metal inner shell 240 is manufactured by an integral molding process and is sleeved outside the insulation main body 230. The upper shell 241 and the lower shell 242 are formed with positioning holes 244 corresponding to the positioning buckles 234, the positioning buckles 234 are used in cooperation with the positioning holes 244, and the positioning buckles 234 are buckled in the positioning holes 244.

A plurality of contact springs 245 are formed at the front ends of the upper casing 241 and the lower casing 242, the thickness of the contact springs 245 is smaller than the wall thickness of the upper casing 241 and the lower casing 242, the contact springs 245 are located in front of the contact portion 224 of the conductive terminal set 220, and pass through the through holes formed in the upper wall 231 and the lower wall 232 of the insulating main body 230 and extend into the docking slot 238; extension clamping plates 247 are formed on two sides of the rear end of the metal inner shell 240, an opening 248 is formed in the extension clamping plates 247, and the opening 248 is used for accommodating the built-in circuit board 210 to be inserted and preventing the built-in circuit board 210 from shaking; a latch arm (latch)246 is formed on each of the two side casings 243, the latch arm 246 has a bent structure, a hook portion protruding into the mating groove 238 is formed at the front end, and the rear end is connected to the two side casings 243. Latch arms 246 are positioned within slots 237 when inner metal shell 240 is positioned over the exterior of insulative body 230.

In this embodiment, the upper casing 241 and the lower casing 242 are hollowed to form a hollow structure 249, and the hollow structure 249 in this embodiment is a closed structure. The hollow structure 249 includes a pair of side arms 2491, a front arm 2492 connecting front ends of the pair of side arms 2491, and a rear arm 2493 connecting rear ends of the pair of side arms 2491, the upper wall 231 and the lower wall 232 of the insulating body 230 have U-shaped grooves 239 on left and right sides for accommodating the side arms 2491 and the front arm 2492, and the contact spring 245 extends forward and inward from the front arm 2492. Latch arm 246 is spaced above and below side arms 2491 and disconnected from upper and lower housings 241, 242, with latch arm 246 tending to align with the rear ends of side arms 2491.

Specifically, as shown by the oval shaped area in the figure. Since the hollow structure 249 is formed between the upper case 241 and the lower case 242, when the metal inner case 240 is mounted on the insulating body 230, the upper wall 231 and the lower wall 232 of the insulating body 230 are exposed by the hollow structure 249, so that the thickness of the exposed portion of the upper wall 231 and the lower wall 232 of the insulating body 230 by the hollow structure 249 can be increased, and the thickness of the corresponding portion of the upper wall 231 and the lower wall 232 and the hollow structure 249 is increased compared with the thickness of the other portion. On the one hand, the structural strength of the insulating main body 230 can be enhanced, and on the other hand, a short circuit between the portion of the conductive terminal group 220 located in the terminal groove 235 and the metal inner case 240 can be prevented; moreover, the insulation body 230 is integrally formed, and an insulation sheet (mylar sheet) does not need to be additionally mounted on the insulation body 230, so that the assembly is simpler, and the production cost is saved.

Fig. 6B is a schematic structural diagram of a metal inner shell according to another embodiment of the present invention. As shown in fig. 6B, the metal inner housing 240 of the present embodiment may also be made of a split structure, the metal inner housing 240 is divided into two housing halves, namely, a first housing half 2401 and a second housing half 2402, and the first housing half 2401 and the second housing half 2402 are butt-assembled in the left-right direction to form the metal inner housing 240.

Fig. 6C is a schematic structural diagram of a metal inner shell according to another embodiment of the present invention. As shown in fig. 6C, the inner metal shell 240 of the present embodiment has a U shape with one open end in the vertical direction, and compared with the embodiment shown in fig. 6A, the inner metal shell 240 of the present embodiment does not form a rear arm 2493 connecting the rear ends of the side arms 2491, wherein the latch arms 246 are integrally formed with the two side shells 243. The metal inner shell 240 of the embodiment can simplify the part processing technology, save the production cost, increase the strength of the metal inner shell 240, realize better grounding of the latch arm 246 and the metal inner shell 240, and increase the reliability of the product.

Fig. 7 is a schematic structural diagram of a metal housing according to an embodiment of the invention. As shown in fig. 2 to 7, the metal outer shell 250 is manufactured by two-section integral stretching process and is sleeved outside the metal inner shell 240, and the thickness and width of the former section of metal outer shell 250 are smaller than those of the latter section of metal outer shell 250. The metal shell 250 further has a positioning groove 251, the positioning groove 251 is used in cooperation with the positioning buckle 234 and the positioning hole 244, and the positioning buckle 234 is fastened in the positioning hole 244 and the positioning groove 251. In addition, the metal shell 250 has tail portions 252 at both sides of the rear end, the tail portions 252 correspond to and abut against the extension clamping plates 247, and an opening 253 is formed for accommodating the insertion of the internal circuit board 210 and preventing the internal circuit board 210 from shaking. Although the metal inner housing 240 has the hollow structure 249, since the metal outer housing 250 of the electrical connector 200 of the present invention is manufactured by an integral drawing process, it is possible to completely secure a shielding effect together with the metal inner housing 240.

The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (12)

1. An electrical connector, comprising:

a conductive terminal set;

the insulating body is provided with a butt joint groove, the conductive terminal group is at least partially accommodated in the insulating body, and the conductive terminal group is provided with a contact part positioned in the butt joint groove;

the metal inner shell is sleeved outside the insulating main body;

the metal outer shell is sleeved outside the metal inner shell;

the metal inner shell comprises an upper shell, a lower shell located below the upper shell and two side shells connected with the upper shell and the lower shell, and the upper shell and the lower shell are of hollow structures.

2. The electrical connector of claim 1, wherein: the hollow structure is set to be a closed annular structure or a U-shaped structure with one open side.

3. The electrical connector of claim 1, wherein: the conductive terminal group is arranged on the insulating main body, the conductive terminal group is connected with the conductive terminal group, the built-in circuit.

4. The electrical connector of claim 1, wherein: the conductive terminal group is manufactured by adopting a blanking process and comprises a power terminal, a grounding terminal and a signal terminal, wherein the thicknesses of the power terminal and the grounding terminal are greater than that of the signal terminal.

5. The electrical connector of claim 4, wherein: each of the power terminals, the ground terminals and the signal terminals includes a contact portion, a fixing portion and a welding portion, and the thickness of the contact portion in the power terminal and the ground terminal is smaller than the thickness of the fixing portion and/or the welding portion in the power terminal and the ground terminal.

6. The electrical connector of claim 1, wherein: the insulating main body further comprises an upper wall and a lower wall, the hollow structure is provided with a pair of side arms spaced left and right and a front arm connected with the front ends of the side arms, and the upper wall and the lower wall of the insulating main body are provided with grooves for accommodating the side arms and the front arm.

7. The electrical connector of claim 6, wherein: the hollow structure also has a rear arm connecting rear ends of the pair of side arms.

8. The electrical connector of claim 1, wherein: the two side shells of the metal inner shell further comprise lock catch arms which are disconnected from the upper shell and the lower shell, and the front ends of the lock catch arms are provided with hook parts located in the butt joint grooves.

9. The electrical connector of claim 8, wherein: the rear end of the latch arm is integrally connected with the two side shells.

10. The electrical connector of claim 1, wherein: the metal inner shell still includes extension splint, extension splint set up metal inner shell rear end both sides, just extension splint are provided with the opening.

11. The electrical connector of claim 6, wherein: the metal inner shell further comprises a contact elastic sheet, the contact elastic sheet is formed by extending forwards from the front arm, and the thickness of the contact elastic sheet is smaller than the wall thickness of the upper shell and the lower shell.

12. The electrical connector of claim 1, wherein: the metal inner shell is of an integrated structure or is formed by splicing two half shells left and right.

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