TWM546034U - Electrical connector - Google Patents

Description

Electrical connector

The present invention relates to an electrical connector, and more particularly to a waterproof electrical connector.

The Chinese patent CN201620261795.6 discloses a connector comprising: a terminal module comprising an insulating body and a plurality of terminals disposed on the insulating body; a main housing, the terminal module being mounted in the main housing Forming protrusions protruding inwardly for positioning the terminal module, and an outer support housing, the main housing being mounted on the top side and the bottom side of the main housing, respectively An inner portion of the outer support housing, which are welded to each other; wherein: a positioning protrusion on one of a top side and a bottom side of the main housing is a crack protrusion having a fracture hole; the main housing The positioning protrusion on the other of the top side and the bottom side is an intact protrusion without cracking; and a waterproof film is attached only on the one side of the main casing to seal the cracked convex Thereby, the external water vapor is prevented from entering the inside of the main casing via the rupture hole on the rupture projection. In the existing waterproof structure, since the main casing is formed by a stamping process, there is a joint slit extending in the front-rear direction, and the front end of the main casing and the outer support shell are not provided with a corresponding waterproof structure, so that water droplets exist from the joint The front end of the device enters, and the gap between the joint seam and the main housing and the outer support housing penetrates into the interior of the electronic device (such as a mobile phone) in which the connector is installed, and it is necessary to improve the waterproof performance of the electronic device. .

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art described above, and to provide an electrical connector that can achieve a better waterproof sealing effect.

Thus, in some embodiments, the novel device includes a terminal block, a metal inner casing, a metal outer casing, a seal ring, a waterproof rubber, and a waterproof membrane. The terminal block includes an insulating body and upper row of conductive terminals and lower row of conductive terminals fixed on the insulating body; the metal inner casing is a hollow annular structure integrally formed without a joint seam, the metal inner casing A receiving cavity for receiving the terminal block is formed in the front and rear. The metal inner casing is formed with a plurality of holding protrusions for holding the terminal block inwardly, and one for each holding protrusion is formed. Opening a hole; the metal casing is disposed on an outer circumference of the metal inner casing, the metal casing extending downwardly from the plurality of welding legs; the sealing ring is circumferentially disposed at a front end of the outer periphery of the metal inner casing; the waterproof rubber is applied to the outer casing The rear end of the receiving cavity and correspondingly sealing the joint of the insulating body and the metal inner casing; the waterproofing membrane covering the metal inner casing and correspondingly sealing the opening of the metal inner casing.

In some embodiments, the insulative housing includes a base, a tongue extending forwardly from the base, and a protrusion extending rearwardly from the base, wherein the base and the metal inner casing The inner wall is grounded and mated together, and the protruding portion protrudes rearwardly from the receiving cavity.

In some embodiments, the metal casing includes a body and an extension extending rearwardly from the body, the body being welded to the metal inner casing, the extension surrounding the outer periphery of the projection of the insulating body.

In some embodiments, the main body of the metal casing includes a top wall, two side walls respectively bent downwardly from two sides of the top wall, and a welding further extending downward from the two side walls respectively. a foot portion; the extension portion of the metal casing comprises: a first vertical extension portion bent downwardly from a rear end of the top wall of the main body, and a horizontal extension end from the bottom end of the first vertical extension portion And an extension portion, and a second vertical extension further extending downwardly at a rear end of the horizontal extension.

In some embodiments, the protruding portion of the insulating body is provided with a glue filling channel at a position close to the base, and the upper row of conductive terminals and the lower row of conductive terminals are embedded in the insulating body. And partially exposed to the glue filling channel, the waterproof glue is filled in the glue filling channel.

In some implementations, the terminal block further includes a shielding piece disposed between the upper row of conductive terminals and the lower row of conductive terminals; the shielding piece is bent upward or downward to extend a plurality of grounding elastic arms, The grounding elastic arms are respectively in contact with the grounding terminals of the upper row of conductive terminals and the lower row of conductive terminals.

In some embodiments, both sides of the shielding piece extend laterally outwardly from the two grounding spring arms, wherein one of the grounding spring arms is bent upward to contact the grounding terminal of the upper row of conductive terminals, and the other The grounding spring arm is bent downward to contact the ground terminal in the lower row of conductive terminals.

In some embodiments, the shielding piece is provided with a hollow portion inside the grounding elastic arm, and the insulating body is filled in the hollow portion.

In some embodiments, the metal inner casing includes a top wall, two side walls respectively located on two sides of the top wall, and a bottom wall; wherein the top wall and the bottom wall are provided with the aforementioned holding protrusions And the opening, the outer sides of the top wall and the bottom wall are respectively covered with one of the aforementioned waterproof films.

In some embodiments, the front end of the metal inner casing is circumferentially formed with an outwardly raised flange, the front end of which is resisted by the flange, and the rear end of the sealing ring is abutted by the metal casing.

The present invention has at least the following effects: Compared with the prior art, the metal inner casing formed by the metal drawing process of the present invention can remove the joint seam on the metal inner shell, and then seal the metal inner shell and the electronic device through the sealing ring. The joint gap between the joints is sealed by the waterproof glue to seal the joint gap between the rear end of the metal inner shell and the terminal seat, and the opening on the metal inner shell is sealed by the waterproof membrane to achieve a better waterproof sealing effect.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

Although the present invention can be readily embodied in various forms, the specific embodiments shown in the drawings and described in detail in the specification are only The exemplary description of the novel principles is not intended to limit the invention to what is described herein.

Thus, a feature indicated in this specification will be used to illustrate one of the features of one embodiment of the present invention, and is not intended to suggest that each embodiment of the present invention must have the features described. Moreover, it should be noted that this specification describes a number of features. Although certain features may be combined together to illustrate possible system designs, these features are also applicable to other combinations not explicitly illustrated. Accordingly, the illustrated combinations are not intended to be limiting, unless otherwise indicated.

In the embodiments shown in the figures, the indications of the directions (such as up, down, left, right, front and back) are used to explain that the structure and motion of the various elements of the present invention are not absolute but relative. These descriptions are suitable when the elements are in the positions shown in the figures. If the description of the position of these elements changes, the indications of these directions also change accordingly.

The preferred embodiments of the present invention are further elaborated below in conjunction with the drawings of the specification.

Referring to Figures 1, 2 and 3, the present invention provides a waterproof USB type-C electrical connector 10 that is mounted on the circuit board 20 in an on-board mounting manner.

Referring to FIG. 4 to FIG. 8 , the electrical connector 10 includes a terminal housing 1 , a metal inner casing 2 sleeved on the outer periphery of the terminal block 1 , and a metal casing 3 fixed on the metal inner casing 2 . a sealing ring 4 disposed at the front end of the outer periphery of the metal inner casing 2 and located in front of the metal casing 3, and a waterproof rubber 5 applied to the joint of the terminal housing 1 and the rear end of the metal inner casing 2, And two waterproof films 6, 7 attached to the outside of the metal inner casing 2.

Referring to FIG. 3, FIG. 7, and FIG. 8, the terminal block 1 includes an insulative housing 11, and upper row of conductive terminals 12, lower row of conductive terminals 13 embedded in the insulative housing 11, and spaced apart from the upper row of conductive terminals. A shielding sheet 14 between the 12 and the lower row of conductive terminals 13. In this embodiment, the terminal block 1 is preferably a first terminal module, a second terminal module, a shielding sheet 14 sandwiched between the first terminal module and the second terminal module, and further Injection molding is formed by combining a third insulating member on the outer circumference thereof.

The insulative housing 11 includes a base 112, a tongue 114 extending forwardly from the base 112, and a protrusion 116 extending rearwardly from the base 112. The protruding portion 116 is disposed at a position close to the pedestal 112 with a potting channel 115 penetrating up and down, wherein the upper row of conductive terminals 12 and the lower row of conductive terminals 13 are embedded in the insulating body 11 and partially exposed to Filling the channel 115.

The shielding sheet 14 is formed by integrally stamping and bending a metal sheet. Two sides of the shielding piece 14 extend laterally outwardly from the two grounding elastic arms 142, 143, and the grounding elastic arms 142, 143 are bent upward or downward, respectively, and the upper row of conductive terminals 12 and the lower row of conductive terminals 13 The ground terminals on both sides are electrically contacted, thereby improving the ground shielding capability of the shielding sheet 14 and reducing crosstalk of high frequency signals.

Specifically, in the preferred embodiment, one grounding elastic arm 142 is bent upward to contact the grounding terminal of the upper row of conductive terminals 12, and the other grounding elastic arm 143 is bent downward and the grounding terminal of the lower row of conductive terminals 13 contact. In addition, the shielding piece 14 is provided with a hollow portion 144 inside the grounding elastic arms 142, 143. The insulating body 11 is filled in the hollow portion 144 so as to be able to reinforce the insulating body 11 and the shielding sheet 14. The bonding strength increases the structural strength of the terminal block 1.

Referring to FIG. 3, FIG. 7 and FIG. 8, the metal inner casing 2 has a hollow annular structure which is integrally stretched by a metal drawing process, and does not have a joint seam extending in the front-rear direction which is inevitable in the stamping process. Therefore, the waterproof performance of the metal inner casing 2 can be improved. The metal inner casing 2 is internally formed with a receiving cavity 29 for receiving the terminal block 1 in a front-rear direction. The inner wall of the inner metal shell 2 is grounded and mated with the base 112 of the insulative housing 11. The metal inner casing 2 is formed with a plurality of holding protrusions 28 for holding the terminal block 1 inwardly, and an opening 27 is formed correspondingly at each of the holding protrusions 28.

Specifically, the metal inner casing 2 includes a top wall 21, two side walls 22 respectively located at two sides of the top wall 21, and a bottom wall 23. The top wall 21 is provided with two holding protrusions 28 and two opening holes 27. The bottom wall 23 is provided with a holding projection 28 and an opening 27.

In addition, the front end of the metal inner casing 2 is circumferentially formed with an outwardly raised flange 25 for facilitating positioning and protection of the sealing ring 4. The rear end of the metal inner casing 2 substantially coincides with the position of the glue filling channel 115 of the insulating body 11 in the front-rear direction. In other words, the glue filling channel 115 is located at the rear end position of the receiving cavity 29.

Referring to FIG. 3 and FIG. 5 to FIG. 8, the metal casing 3 is integrally stamped and bent from a metal plate. The metal casing 3 has a lid structure that is open at the lower side. The metal casing 3 integrally surrounds the rearward projecting portion 116 of the terminal block 1 to prevent leakage of electromagnetic radiation. The metal casing 3 is attached and fixed to the outer periphery of the metal inner casing 2. In the present embodiment, the metal casing 3 is laser welded to the metal inner casing 2. The metal casing 3 includes a body 31 and an extension 32 extending from the body 31.

The main body 31 includes a top wall 311, two side walls 312 which are respectively bent downwardly from two sides of the top wall 311, and soldering legs 313 and 315 which are further extended downward from the two side walls 312, respectively. Referring to FIG. 1, these soldering legs 313, 315 can be soldered to the grounding holes on the circuit board 20 to achieve grounding of the metal casing 3 and the metal inner casing 2.

The extending portion 32 includes a first vertical extending portion 321 which is bent downwardly from a rear end of the top wall 311 of the main body 31, and a horizontal extension extending rearward from a bottom end of the first vertical extending portion 321 a portion 322, and a second vertical extension 323 further bent downwardly at a rear end of the horizontal extension portion 322.

Referring to Figure 3, the front end of the seal ring 4 is resisted by a flange 25 on the inner metal casing 2. The rear end of the seal ring 4 is abutted by the front end of the metal casing 3, so that the seal ring 4 can be prevented from sliding back and forth. The sealing ring 4 is matched with the outer casing of the electronic device (not shown, such as a mobile phone casing). This structure can well prevent the external water droplets from penetrating backward along the bonding gap between the metal inner casing 2 and the outer casing of the electronic device. Go to the electronic device. In this embodiment, the sealing ring 4 is made of a relatively elastic insulating material such as silicone rubber. This can enhance the elastic deformation ability of the sealing ring 4 when combined with the outer casing of the electronic device, thereby achieving a better waterproof sealing effect.

Referring to FIG. 3, the waterproof adhesive 5 is applied to the rear end surface of the base 112 of the terminal block 1 for sealing the matching gap between the base 112 of the terminal block 1 and the rear end of the metal inner casing 2, thereby improving The purpose of the waterproof performance of the electrical connector. Preferably, the waterproof adhesive 5 is further filled in the front half of the glue filling channel 115 for sealing between the upper row of the conductive terminals 12 and the lower row of the conductive terminals 13 and the insulating body 11 due to different materials under thermal expansion and contraction. The tiny cracks can meet the higher level of waterproofing requirements.

Referring to FIGS. 3 and 6, the waterproofing membranes 6, 7 are covered at the opening 27 of the metal inner casing 2 for sealing the opening 27, thereby preventing external water droplets from penetrating into the electrons from the receiving cavity 29 through the opening 27. The inside of the device (not shown) adversely affects the circuit board 20 and peripheral components. In the present embodiment, the waterproof film 6, 7 is preferably an insulating polyester film (Mylar). Specifically, the waterproof film 6 covers the top side of the metal inner casing 2, and the waterproof film 7 covers the bottom side of the metal inner casing 2. The waterproof film 6 is pressed against the top side of the metal inner casing 2 by the metal casing 3, and the waterproof film 7 is pressed against the bottom side of the metal inner casing 2 by the circuit board 20.

The manufacturing and assembly process of the electrical connector 10 generally includes the steps of: combining the insulative housing 11, the upper row of conductive terminals 12, the lower row of conductive terminals 13 and the shielding sheet 14 by insert molding to obtain the terminal block 1; The casing 2 is sleeved and fixed to the outer periphery of the terminal block 1; the waterproof films 6, 7 are respectively covered to the outer sides of the top and bottom walls of the metal inner casing 2; the waterproof rubber 5 is applied to the base 112 of the terminal block 1 The end surface is filled into the glue filling channel 115; the metal outer casing 3 is mounted on the metal inner casing 2, and the metal outer casing 3 and the metal inner casing 2 are laser welded together; finally, the sealing ring 4 is mounted to The front end of the metal inner casing 2.

In summary, compared with the prior art, the metal inner casing 2 formed by the metal drawing process of the present invention can remove the joint seam on the metal inner casing 2, and then seal the metal inner casing 2 through the sealing ring 4. a joint gap with the electronic device, sealing the joint gap between the rear end of the metal inner shell 2 and the joint of the terminal block 1 through the waterproof rubber 5, and sealing the opening 27 of the metal inner shell 2 through the waterproof membranes 6, 7 A good waterproof sealing effect can be achieved, so the purpose of the novel can be achieved.

However, the above is only the embodiment of the present invention, and when it is not possible to limit the scope of the present invention, all the simple equivalent changes and modifications according to the scope of the patent application and the contents of the patent specification are still This new patent covers the scope.

10‧‧‧Electrical connector
20‧‧‧ boards
1‧‧‧ terminal block
11‧‧‧Insulation body
112‧‧‧Base
114‧‧‧ tongue plate
115‧‧‧Glue channel
116‧‧‧diffuse
12‧‧‧Upper row of conductive terminals
13‧‧‧Bottom row of conductive terminals
14‧‧‧Shield
142‧‧‧ Grounding arm
143‧‧‧ Grounding arm
144‧‧‧镂空部
2‧‧‧Metal inner shell
21‧‧‧ top wall
22‧‧‧ side wall
23‧‧‧ bottom wall
25‧‧‧Flange
27‧‧‧Opening
28‧‧‧ holding bulge
29‧‧‧ docking chamber
3‧‧‧Metal casing
31‧‧‧ Subject
311‧‧‧ top wall
312‧‧‧ side wall
313‧‧‧ soldering feet
315‧‧‧ soldering feet
32‧‧‧Extension
321‧‧‧First vertical extension
322‧‧‧ horizontal extension
323‧‧‧Second vertical extension
4‧‧‧Seal ring
5‧‧‧Waterproof glue
6‧‧‧Waterproof membrane
7‧‧‧Waterproof membrane

Other features and advantages of the present invention will be apparent from the following description of the drawings, wherein: Figure 1 is a perspective view of a preferred embodiment of the present invention. Figure 2 is a front elevational view of Figure 1. Figure 3 is a cross-sectional view taken along line A-A of Figure 2 . 4 is a perspective view of a preferred embodiment of the novel electrical connector. Figure 5 is an exploded perspective view of a preferred embodiment of the electrical connector of the present invention. Fig. 6 is a further exploded perspective view of Fig. 5; Fig. 7 is a further exploded perspective view of Fig. 6; Fig. 8 is a further exploded perspective view of Fig. 7; ;

10‧‧‧Electrical connector

20‧‧‧ boards

1‧‧‧ terminal block

11‧‧‧Insulation body

112‧‧‧Base

114‧‧‧ tongue plate

116‧‧‧diffuse

12‧‧‧Upper row of conductive terminals

13‧‧‧Bottom row of conductive terminals

14‧‧‧Shield

2‧‧‧Metal inner shell

25‧‧‧Flange

28‧‧‧ holding bulge

29‧‧‧ docking chamber

3‧‧‧Metal casing

313‧‧‧ soldering feet

315‧‧‧ soldering feet

4‧‧‧Seal ring

5‧‧‧Waterproof glue

6‧‧‧Waterproof membrane

7‧‧‧Waterproof membrane

Claims (10)

An electrical connector includes: a terminal block including an insulative housing and upper row of conductive terminals and lower row of conductive terminals fixed to the insulative housing; a metal inner casing that is integrally stretched and does not have a hollow annular structure of the joint, the inside of the metal inner casing is formed with a front and a rear receiving cavity for receiving the terminal block, and the metal inner casing is formed with a plurality of holding protrusions for holding the terminal seat inwardly protrudingly And an opening is formed corresponding to each of the holding protrusions; a metal casing is disposed on an outer circumference of the metal inner casing, the metal casing extends downwardly from the plurality of welding legs; and a sealing ring is circumferentially disposed on the a front end of the outer periphery of the metal inner casing; a waterproof rubber applied to the rear end of the receiving cavity and correspondingly sealing the joint of the insulating body and the metal inner casing; and a waterproof film covering the inner metal casing And corresponding to the opening of the metal inner casing. The electrical connector of claim 1, wherein the insulative housing comprises a base, a tongue extending forwardly from the base, and a protrusion extending rearwardly from the base, wherein the base The seat is mated to the inner wall of the inner metal shell, and the protruding portion protrudes rearwardly from the receiving cavity. The electrical connector of claim 2, wherein the metal casing comprises a body and an extension extending rearwardly from the body, the body being welded to the metal inner casing, the extension surrounding the insulating body The periphery of the protrusion. The electrical connector of claim 3, wherein the main body of the metal casing comprises: a top wall, two side walls respectively bent downwardly from two sides of the top wall, and the two side walls respectively a further extending downwardly extending solder joint; the extension of the metal outer casing comprising: a first vertical extension extending downwardly from a rear end of the top wall of the main body, the bottom end of the first vertical extension A horizontal extension extending further rearward, and a second vertical extension further extending downwardly at a rear end of the horizontal extension. The electrical connector of claim 2, wherein the protruding portion of the insulating body is provided with a glue filling channel at a position close to the base, and the upper row of conductive terminals and the lower row of conductive terminals are Embedded in the insulating body and partially exposed to the potting channel, the waterproof glue is filled in the potting channel. The electrical connector of claim 1, wherein the terminal block further comprises a shielding piece disposed between the upper row of conductive terminals and the lower row of conductive terminals; the shielding piece is bent upward or downward to extend a plurality of grounding elastic arms that are in contact with the grounding terminals of the upper row of conductive terminals and the lower row of conductive terminals, respectively. The electrical connector of claim 6, wherein both sides of the shielding piece extend laterally outwardly from the two grounding elastic arms, wherein one of the grounding elastic arms is bent upward and the grounding of the upper row of conductive terminals The terminals are in contact while the other grounded spring arm is bent downward to contact the ground terminal in the lower row of conductive terminals. The electrical connector of claim 6, wherein the shielding piece is provided with a hollow portion inside the grounding elastic arm, and the insulating body is filled in the hollow portion. The electrical connector of any one of claims 1 to 8, wherein the metal inner casing comprises a top wall, two side walls respectively located on opposite sides of the top wall, and a bottom wall; wherein the top wall and the The bottom wall is provided with the aforementioned holding protrusions and openings, and the outer sides of the top and bottom walls are respectively covered with a waterproof film as described above. The electrical connector of any one of claims 1 to 8, wherein the front end of the metal inner casing is circumferentially formed with an outwardly rising flange, the front end of the sealing ring being resisted by the flange, the sealing ring The rear end is abutted by the metal casing.