TWI689145B - Electrical connector and method of making the same - Google Patents

Abstract

An electrical connector includes an insulative housing, a number of contacts retained in the housing, a shielding shell attached to the housing, and a metal shell connected to a printed circuit board. The housing includes a base portion and tongue portion. The electrical connector further has an insulative shell insert-molded with the metal shell. The insulative shell encloses the shielding shell to fix the metal shell to the shielding shell.

Description

Electric connector and its manufacturing method

The invention relates to an electrical connector, in particular to an electrical connector that can be inserted forward and reverse and a manufacturing method thereof.

For related prior art, please refer to a waterproof socket electrical connector disclosed in Chinese Patent No. CN104538782A. The waterproof socket electrical connector includes a rubber core shell, a shield shell, an insulating body and a sealing body. The rubber core shell includes a hollow opening, and a plug-in side and a sealing side on both sides of the hollow opening, respectively. The shield shell is arranged in the hollow opening. The sealing body is formed when the sealing side fills the gap between the rubber core shell and the shield shell. Refer to a waterproof electrical connector disclosed in Patent No. CN104752888A of Mainland China Invention. The electrical connector includes an insulating body, terminals, a shielding shell and a waterproof shell. The waterproof shell is sleeved on the shield shell. The waterproof shell is covered with a waterproof rubber ring. A sleeve portion is provided at the rear end of the waterproof casing, and the sleeve portion wraps the rear baffle at the rear end of the shield casing. The rear end of the insulating body and the fitting portion of the waterproof shell together surround a glue filling cavity for pouring the waterproof glue. Reference is made to a waterproof electrical connector disclosed in the Chinese utility model patent No. CN204289872U. The waterproof electrical connector includes an outer shield shell, a fixing element, a composite module and an insulating shell. The top plate of the fixing element and the outer shield shell are fixed together. The outer shield shell and the fixing element are insert-molded inside the insulating shell. In the prior art, this type of waterproof design cannot completely fit the metal shell of the electrical connector, which may easily cause water leakage, liquid leakage, etc., thereby damaging the internal structure of the electrical connector. At the same time, the above-mentioned waterproof casing cannot guarantee the correct position of the product, and the auxiliary casing is easily connected to the main casing loosely and cannot be stably held. In addition, when used in certain occasions, it is often necessary to install protective rings and dust rings, and even add lubricating oil to prevent wear and tear, which is time-consuming and labor-intensive.

Refer to a waterproof electrical connector disclosed in Patent No. CN103208698B of Mainland China Invention. The electrical connector includes a metal shell, an insulating body installed in the metal shell, a terminal fixed on the insulating body, and an insulating shell wrapped around the metal shell. A metal holder connected to the circuit board is injection molded on the outside of the insulating shell. In this type of design, the outer shape of the insulating housing is formed with a holding member and is fitted on the metal housing, which may easily cause the insulating housing and the metal housing to not fit tightly and may slip off.

Therefore, an improved electrical connector is needed to make up for the above-mentioned defects in the prior art.

The main purpose of the present invention is to provide an electrical connector and a manufacturing method thereof, which can waterproof and enhance the strength of the electrical connector.

The object of the present invention is achieved by the following technical solution: an electrical connector, including an insulating body with a base and a tongue plate, a plurality of conductive terminals held on the insulating body, sleeved outside the insulating body Shielding shell and a metal shell connected to the circuit board, the electrical connector further includes a waterproof shell integrally formed with the metal shell, the waterproof shell is sleeved outside the shielding shell and allows the metal The casing is fixedly connected to the shielding shell.

The purpose of the present invention is achieved by the following technical solution two: a method of manufacturing an electrical connector, comprising: a. forming a terminal module, which includes an insulating body with a tongue plate and conductive terminals held on the insulating body and Reinforcement; b. Provide a shielding shell, sleeve the shielding shell outside the terminal module; c. Provide a metal shell, integrally forming a waterproof shell outside the metal shell; d. Set the metal The outer shell and the waterproof shell are outside the shielding shell, and the metal shell is fixedly connected to the shielding shell.

The purpose of the present invention is achieved by the following technical solution three: an electrical connector including an insulating body with a tongue plate, a plurality of conductive terminals held on the insulating body, and a shielding shell sleeved around the insulating body Body and a waterproof shell wrapped around the shielding shell, the waterproof shell is formed with a receiving cavity, the tongue plate extends forward from the shielding shell and is received in the receiving cavity, the waterproof shell is provided inside There is a stepped portion to divide the inner wall of the waterproof casing into a front inner wall and a rear inner wall, and the outside of the shielding shell is fitted to the rear inner wall so that the front port of the shielding shell abuts the stepped portion.

Compared with the conventional technology, the present invention has the following effect: when the metal sheet is mounted on the second insulating body, the hook hooks the side of the notch of the metal sheet to make the metal sheet vertical square Stable upwardly to the second insulating body. After the metal sheet is mounted on the second insulating body, the first insulating body is fixed to the second insulating body and the metal sheet, so that the first insulating body, the second insulating body, and the metal sheet have been stably held before the third insulating body is formed It is integrated to ensure the stability of the first insulating body, the metal sheet and the second insulating body, which is convenient for mass production.

100: electrical connector

1: Insulation body

11: Dock

111: Piercing

112: groove

113: Place slot

12: tongue plate

121: Terminal slot

122: Cutout

123: empty gap

124: Platform

125: holding slot

13: rear end

131: Press groove

14: Insulation block

2: conductive terminal

20: convex hull

21: First terminal

211: The first contact

212: The first holding part

213: The first welding department

22: Second terminal

221: second contact

222: Second holding part

223: Second Welding Department

3: Reinforcement

31: Main body

32: Bending section

33: Welding feet

4: Shielding the shell

40: inner edge

41: top wall

411: First resistance

42: bottom wall

421: First abutment arm

422: Second resistance

423: Convex hull

43: Side wall

44: tail

441: Second abutment arm

45: connecting arm

450: opening

5: Metal casing

50: overflow hole

51: vent

52: The first bending foot

53: The first fixed foot

54: second fixed foot

55: Second bending foot

6: waterproof shell

60: containment cavity

61: convex column

62: Step

63: front inner wall

64: rear inner wall

7: Sealing part

200: circuit board

The first figure is a perspective assembled view of the electrical connector of the present invention connected to a circuit board.

The second figure is a perspective assembled view of the electrical connector of the present invention separated from the circuit board.

The third figure is a perspective view of the electrical connector of the present invention taken out of the waterproof housing.

The fourth figure is a perspective view of the electrical connector of the present invention with the waterproof housing and the sealing ring removed and the metal housing removed.

The fifth figure is a schematic perspective view of the fourth figure viewed from another direction.

The sixth figure is a perspective view of the fourth figure with the metal shell removed and the shielding shell removed.

The seventh figure is a schematic perspective view of the sixth figure viewed from another direction.

The eighth figure is a further exploded perspective view of the sixth figure.

The ninth figure is a schematic perspective view of the eighth figure seen from another direction.

Fig. 10 is a perspective schematic view of the insulating body of the electrical connector of the present invention when no insulating block is formed.

Figure 11 is a cross-sectional view of the electrical connector of the present invention taken along line XI-XI in the second figure.

Hereinafter, specific embodiments of the electrical connector 100 of the present invention will be described with reference to the first to eleventh figures. The port where the electrical connector 100 is mated with the mating connector is defined as a mating end. Define the docking direction, the transverse direction perpendicular to the docking direction, and the vertical direction perpendicular to both the docking direction and the transverse direction.

Referring to the first to third figures, the electrical connector 100 of the present invention is fixedly connected to the circuit board 200, and includes an insulating body 1, conductive terminals 2 held in the insulating body 1, and an insulating connector. The reinforcement 3 in the body 1, the shielding shell 4 wrapped around the insulating body 1, the metal shell 5 wrapped around the shield shell 4, and the waterproof shell 6 wrapped around the outside.

Referring to the sixth to tenth figures, the insulating body 1 includes a base 11 and a tongue plate 12 extending forward from the base 11. A rear end portion 13 is horizontally extended from the top end of the base 11. Referring to the first figure, a plurality of pressing grooves 131 are provided on the upper and lower surfaces of the rear end portion 13. The base 11 is provided with a plurality of through holes 111 penetrating up and down near the rear end portion 13. The through holes 111 are used for positioning the conductive terminals 2 while accommodating glue circulation. The top of the base 11 is provided with a groove 112. A pair of placement slots 113 are provided at the rear end of the base 11. The tongue plate 12 has a plurality of terminal grooves 121 and hollow portions 122 provided around the terminal grooves 121 on the upper and lower surfaces. The terminal grooves 121 located on the upper and lower surfaces of the tongue plate 12 are arranged in a partially offset manner, which is convenient for the mold core to press and position the conductive terminal 2. There are empty gaps 123 on both sides of the tongue plate 12, so that the outermost conductive terminals 2 are exposed from the empty gaps 123, which facilitates positioning of the mold core and prevents skew during filling. The insulating body 1 further includes an insulating block 14 integrally formed on the tongue plate 12. Referring to the tenth figure, the tongue plate 12 is provided with a horizontally extending platform 124 close to the base 11, so that the mold core can be pressed when the insulating block 14 is formed, and the glue is prevented. The upper and lower surfaces of the tongue plate 12 are provided with accommodating grooves 125 penetrating through the terminal grooves 121. The accommodating groove 125 is provided on both sides of the terminal groove 121 for easy placement.

Referring to the seventh to ninth figures, the conductive terminal 2 is formed integrally with the insulating body 1 and includes a first terminal 21 and a second terminal 22. The first terminal 21 includes a first contact portion 211 exposing the upper surface of the tongue plate 12, a first holding portion 212 accommodated in the base 11, and a first welding portion 213 extending outside the insulating body 1. The second terminal 22 includes a second contact portion 221 exposing the lower surface of the tongue plate 12, a second holding portion 222 accommodated in the base 11, and a second welding portion 223 extending outside the insulating body 1. The first welding portion 213 and the second welding portion 223 are arranged on the same plane in a row. The first terminals 21 and the second terminals 22 are respectively eight and are symmetrically distributed along the central axis extending forward and backward. The first contact portion 211 of the first terminal 21 and the second contact portion 221 of the second terminal 22 are correspondingly arranged up and down, and the first end The first welding portion 213 of the sub 21 and the second welding portion 223 of the second terminal 22 are located in the same plane. Therefore, regardless of whether the docking connector is inserted in the forward or reverse direction, the first and second contact portions 211 and 221 of the electrical connector 100 and the corresponding contact portion of the docking connector can be correctly and correctly positioned in electrical connection.

As shown in FIG. 6, the first contact portion 211 of the first terminal 21 and the second contact portion 221 of the second terminal 22 are provided with protrusions 20 protruding to both sides. The convex hull 20 is accommodated in the accommodating groove 125, and the convex hull 20 on each conductive terminal 2 is disposed in a misaligned manner, so that the mold core can be pressed on the convex hull 20.

The reinforcing member 3 is provided in two pieces with a hollow in the middle. Each reinforcing member 3 includes a main body portion 31 held in the base 11, a bent portion 32 bent and extended from a tail end of the main body portion 31, and a welding leg formed by bending and extending downward from the bent portion 32 33. The front end of the main body 31 of the reinforcing member 3 exposes the tongue plate 12 of the insulating body 1 and is covered in the insulating block 14.

As shown in the first to ninth figures, the shielding shell 4 includes a top wall 41 and a bottom wall 42 with inner edges 40 disposed opposite each other, and a pair of side walls 43 connecting the top wall 41 and the bottom wall 42 . As shown in the seventh figure, the rear end of the top wall 41 is provided with a first resisting portion 411 protruding inwards, and the rear end edge of the bottom wall 42 is provided with a first contact arm formed by bending downward and extending 421. The first resisting portion 411 is received in the groove 112 of the insulating body 1, and the first contacting arm 421 is received in the placement groove 113 of the insulating body 1, thereby strengthening the shielding shell 4 Fixing with the insulating body 1. The bottom wall 42 is further provided with a pair of second resisting portions 422 protruding inward, and the second resisting portions 422 resist the front end surface of the base 11 of the insulating body 1. Referring to the sixth to ninth figures, the first resisting portion 411 and the pair of second resisting portions 422 are provided at three points to prevent damage to the electrical connector 100 when the mating connector is excessively inserted. The shielding shell 4 further has a tail portion 44 extending backward and horizontally extending from the top wall 41 and a connecting arm 45 connecting the tail portion 44 and the top wall 41. The tail portion 44 is higher than the top wall 41 in the up-down direction. A second abutment arm 441 formed by bending and extending downward is provided on both sides of the tail 44, the second abutment arm 441 bears against the rear end surface of the rear end portion 13 of the insulating body 1. Referring to the fourth and fifth figures, the tail 44 is attached to the upper surface of the rear end 13 of the insulating body 1. An opening 450 is provided in the connecting arm 45. Referring to the fourth figure, the connecting arm 45 corresponds to the through hole 111, so that part of the through hole 111 exposes the opening 450. The front end of the tongue plate 12 exposes the frame opening of the shielding shell 4. The base 11 of the insulating body 1 covers the rear port of the shielding shell 4 to enhance the sealing of the electrical connector 100. The top wall 41 and the bottom wall 42 of the shielding shell 4 are provided with a plurality of convex bulges 423 protruding inward, and the convex bulges 423 interfere with the mating connector for grounding.

As shown in the first to fifth figures, the metal shell 5 is substantially flat and covered on the shielding shell 4. Referring to the fourth and fifth figures, the metal casing 5 has a plurality of overflow holes 50 and exhaust holes 51 provided behind the overflow holes 50. The vent hole 51 corresponds to the opening 450 of the shielding case 4. The front end of the metal shell 5 is provided with a plurality of first bending legs 52. The first bending legs 52 bear against the upper end surface of the top wall 41 of the shielding shell 4. A pair of first fixing legs 53 and a pair of second fixing legs 54 formed on both sides of the metal shell 5 are formed to extend to both sides and bend downward, and the first fixing legs 53 and the first The second bent leg 55 between the two fixed feet 54. Referring to the third to fifth figures, the second bending leg 55 is clamped on both sides of the base 11 of the insulating body 1. The first fixing foot 53 is lower than the second fixing foot 54 in the up-down direction. Referring to the third figure, the rear end of the metal shell 5 is welded to the tail 44 of the shielding shell 4. The second fixing leg 54 is suspended and disposed outside the tail portion 44 of the shielding shell 4.

The waterproof casing 6 is integrally formed with the metal casing 5 and forms a receiving cavity 60. The accommodating cavity 60 accommodates the tongue plate 12 to expose the portion where the shielding case 4 is exposed. Referring to the first and second figures, the rear end surface of the waterproof casing 6 is located at the rear end portion 13 of the insulating body 1 and the front end of the tail portion 44 of the shielding case 4. On both sides of the waterproof housing 6, convex posts 61 protruding outward are provided to enhance the strength of the electrical connector 100. The waterproof casing 6 fills the overflow hole 50 to enhance the holding force between the waterproof casing 6 and the metal casing 5. The first fixing leg 53 of the metal shell 5 is partially wrapped in the waterproof shell 6, and the waterproof shell 6 and the circuit board 200 are supported to reduce There is a risk that the size of the first fixing leg 53 is unstable due to the integral molding of the waterproof casing 6 and the metal casing 5.

Referring to the eleventh figure, the waterproof casing 6 has a stepped portion 62 inside, so that the upper and lower inner walls of the waterproof casing 6 are divided into a pair of front inner walls 63 at the front end of the stepped portion 62 and A pair of rear inner walls 64 at the rear end of the step portion 62. The distance between the pair of front inner walls 63 is smaller than the distance between the pair of rear inner walls 64. The top wall 41 and the bottom wall 42 of the shielding shell 4 conform to the rear inner wall 64, so that the front end of the shielding shell 4 abuts the step portion 62 of the waterproof housing 6 and the shielding shell The inner edge 40 of the body 4 is flush with the front inner wall 63 of the waterproof casing 6. The ports of the waterproof casing 6 are inclined up and down, and the lower port protrudes above the upper port.

Referring to the second figure, the electrical connector 100 further includes a sealing portion 7 sealed at the rear end of the insulating body 1. The sealing portion 7 is filled with glue through the opening 450 of the shielding case 4 and the perforation 111 of the insulating body 1 so as to fill the space between the base 11 and the rear end 13 of the insulating body 1 and the waterproof housing 6 The gap is fully waterproof. When pouring the glue, the vent hole 51 on the metal shell 5 can be used to remove the air in the glue circulation channel.

The manufacturing method of the present invention is as follows: the conductive terminal 2 and the reinforcing member 3 are made of a metal plate, the insulating body 1 is integrally formed outside the conductive terminal 2 and the reinforcing member 3, and then the insulating block 14 is over-molded to block The gap on the insulating body 1; the metal plate is made of a shielding shell 4 and a metal shell 5, the shielding shell 4 is sleeved outside the insulating body 1, the metal shell 5 is integrally formed with the waterproof shell 6; The waterproof shell 6 and the metal shell 5 are sleeved outside the shielding shell 4, and the metal shell 5 and the shielding shell 4 are fixed by laser welding; the opening 450 of the shielding shell 4 is filled with glue Sealing part 7.

In summary, the present invention meets the requirements of the invention patent, and the patent application is filed in accordance with the law. However, the above is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-mentioned embodiment. Any equivalent modifications or changes made by those skilled in the art with the spirit of the present invention should be Covered in the following patent applications.

100: electrical connector

41: top wall

5: Metal casing

50: overflow hole

52: The first bending foot

54: second fixed foot

6: waterproof shell

60: containment cavity

61: convex column

Claims (9)

An electrical connector includes an insulating body having a base and a tongue plate, a plurality of conductive terminals held on the insulating body, a shielding shell sleeved around the insulating body, and a metal shell connected to the circuit board, Wherein, the electrical connector further includes a waterproof shell integrally formed with the metal shell, the waterproof shell is sleeved outside the shielding shell, and the metal shell is provided to extend to both sides and bend downward A pair of first fixing feet located on the front side and a pair of second fixing feet located on the rear side are formed. The first fixing feet and the second fixing feet are held on the circuit board. The tail portion of the shielding shell is fixedly connected to the metal shell. The electrical connector as described in item 1 of the patent application scope, wherein the metal shell is provided with a plurality of overflow holes, and the waterproof shell fills the overflow holes when the waterproof shell and the metal shell are integrally formed. The electrical connector as described in item 1 of the patent application range, wherein the waterproof housing is formed with a receiving cavity, and the tongue plate extends forward from the shielding housing to be received in the receiving cavity. The electrical connector as described in item 3 of the patent application scope, wherein the waterproof housing is provided with a stepped portion up and down to divide the inner wall of the waterproof housing into a front inner wall and a rear inner wall, and the shielding shell is attached outside The rear inner wall is closed so that the front port of the shielding shell abuts the stepped portion, so that the upper and lower inner edges of the shielding shell are flush with the front inner wall. The electrical connector as described in item 1 of the patent application range, wherein the rear end of the base is provided with a pair of placement slots, and the rear end edge of the bottom of the shielding shell is provided with a plurality of first abutting arms formed by bending upwardly and extending , The first abutment arm is accommodated and held in the placement groove of the insulating body. The electrical connector as described in item 1 of the patent application range, wherein the first fixing foot is lower than the second fixing foot in the up-down direction, and the first fixing foot is partially covered in the waterproof case. A method of manufacturing an electrical connector, including: a. forming a terminal module, which includes an insulating body with a tongue plate and conductive terminals and reinforcing members held on the insulating body; b. providing a shielding shell, the shielding shell The body includes a top wall and a tail portion connected to the rear side of the top wall, and the shielding shell is sheathed outside the terminal module; c. A metal shell is provided, a waterproof shell is integrally formed outside the metal shell, the metal The casing is provided with a pair of first fixing feet located on the front side and a pair of second fixing feet located on the rear side which extend to both sides and bend downward to extend, and the first fixing feet and the second fixing feet are held in the circuit On the board; d. sleeve the metal shell and waterproof shell on the outside of the shielding shell, the rear end of the metal shell is welded to the tail of the shielding shell to make the metal shell fixedly connected to the The shielding shell is described. An electrical connector includes an insulating body with a tongue plate, a plurality of conductive terminals held on the insulating body, a shielding shell sleeved around the insulating body, and a waterproof shell wrapped around the shielding shell, wherein , The waterproof shell is provided with a stepped portion to divide the inner wall of the waterproof shell into a front inner wall and a rear inner wall, the waterproof shell is wrapped outside the shielding shell and extends forward from the front end of the shielding shell And a receiving cavity is formed, the outer portion of the shielding shell is in close contact with the rear inner wall, so that the front port of the shielding shell abuts the stepped portion, and the tongue plate extends forward from the front end of the shielding shell It is accommodated in the accommodating cavity, the port of the waterproof casing is inclined up and down, and the lower port protrudes above the upper port. The electrical connector as described in item 8 of the patent application range, wherein the shielding shell is provided with a plurality of convex hulls protruding inward, the convex hull interferes with the mating connector, and the inner edge of the shielding hull is The front inner wall is flush.

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