TWM547199U - 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, preventing external moisture 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 have no corresponding waterproof structure, so that the external water droplets exist from the connection. The front end of the device enters, and the penetration gap between the butt joint and the connector and the outer casing of the electronic device (such as a mobile phone) penetrates into the interior of the electronic device in which the connector is mounted, and it is necessary to improve the waterproofing of the electronic device. performance.

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 implementations, the novel electrical connector includes:

a terminal block includes an insulative housing and a plurality of conductive terminals fixed on the insulative housing;

a metal inner casing formed by a punching and bending forming a receiving cavity for receiving the terminal block, the metal inner casing is formed with a joint seam and a receiving gap at the rear end of the joint seam, the joint seam Sealed by welding;

a metal casing mounted on an outer circumference of the metal inner casing, the metal casing extending downwardly from the plurality of welding legs;

a sealing ring circumferentially disposed at a front end of the metal inner casing;

A waterproof glue is applied to the rear end of the receiving cavity, wherein the waterproof glue is filled in the receiving notch and penetrates forward along the joint seam, and the metal inner casing is sealingly joined to the insulating body.

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 a reinforcing shield structure, the body is welded to the metal inner casing, the reinforcing shielding structure surrounding an outer circumference of the protruding portion of the insulating body; the main body of the metal casing The utility model comprises: a top wall, two side walls respectively bent downwardly from two sides of the top wall, and welding legs extending further downward from the two side walls respectively.

In some embodiments, the reinforcing shield structure of the metal casing comprises: a first vertical extension extending downward from a rear end of the top wall of the main body, and the bottom end of the first vertical extension a horizontal extension extending rearward, and a second vertical extension further extending downwardly at a rear end of the horizontal extension.

In some embodiments, the body and the reinforcing shield structure are independent of each other, and the two are joined together by welding; wherein the body correspondingly covers the receiving recess on the metal inner casing from the outside.

In some embodiments, the two sides of the reinforcing shield structure are bent downward to extend two soldering legs, and the two soldering legs are correspondingly attached to both sides of the body and joined together by soldering.

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 plurality of conductive terminals are embedded and fixed to the insulating body and partially exposed to the glue filling. In the channel, the waterproof glue is filled in the glue filling channel.

In some embodiments, the method further includes: a waterproof film attached to the outer side of the metal inner casing and correspondingly covering the receiving recess on the metal inner casing.

In some embodiments, the metal inner casing includes a bottom wall, two side walls respectively bent upwardly from two sides of the bottom wall, and a top wall formed by the opposite ends of the two side walls extending and engaging. The joint is located at the joint of the top wall and extends in the front-rear direction, wherein a part of the joint is formed by a wedge-shaped protrusion and a wedge-shaped groove correspondingly corresponding to the wedge-shaped protrusion.

In some embodiments, the receiving notch is located at a rear end of the top wall of the metal inner casing, which is a square notch that is recessed forward from both sides of the joint.

Compared with the prior art, the electrical connector of the present invention is sealed by welding the joint seam on the metal inner casing, and forms a receiving gap at the rear end of the joint seam, and then seals the rear end of the metal inner shell with the waterproof rubber. a fitting gap at the joint of the terminal block fills the receiving recess and penetrates forward along the joint to fully close the joint; on the other hand, seals the joint gap between the metal inner shell and the outer casing of the electronic device through the sealing ring , can achieve a better waterproof sealing effect.

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 a circuit board 20 in an on-board mounting.

Referring to FIG. 4 to FIG. 7 , 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 seal ring 4 disposed at a 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 block 1 and the rear end of the metal inner casing 2 And a waterproof film 6 attached to the outside of the metal inner casing 2.

Referring to FIGS. 3 and 7, the terminal block 1 includes an insulative housing 11 and a plurality of conductive terminals 12 embedded in the insulative housing 11. The insulative housing 11 includes a base 112, a tongue 114 extending forwardly from the base 112, and a protrusion 116 extending rearward from the base 112. The protruding portion 116 is disposed at a position close to the pedestal 112, and a potting channel 115 is formed. The conductive terminals 12 are embedded in the insulating body 11 and partially exposed to the potting channel 115.

Referring to Figures 3, 6, and 7, the metal inner casing 2 is made of a metal stamping process. Inside the metal inner casing 2, a receiving cavity 29 for accommodating the terminal block 1 is formed in the front and rear. The inner wall of the inner metal shell 2 is grounded and mated with the base 112 of the insulative housing 11. The protruding portion 116 of the insulative housing 11 projects rearwardly from the receiving cavity 29.

The metal inner casing 2 protrudes inwardly to form a plurality of holding projections 28 for holding the terminal block 1. The metal inner casing 2 is formed with a joint slit 231, and a receiving recess 233 is formed at the rear end of the joint seam 231. It is worth mentioning that since the metal inner casing 2 is made of a thicker plate material, cracking can be prevented at each of the holding projections 28, so that the waterproof sealing property of the metal inner casing 2 can be improved.

Further, the joint seam 231 is preferably hermetically sealed by welding. In the preferred embodiment, the joint seam 231 is welded by laser, and the metal plates on both sides of the joint seam 231 can be integrally connected, thereby increasing the structural strength of the metal inner shell 2 and preventing the electrical connector from being electrically connected. The external water droplets entering the receiving chamber 29 in the front of the casing 10 ooze out through the joint slit 231 to affect the normal operation of the electronic device (not shown, such as a mobile phone), which adversely affects the waterproof capability of the electronic device. It is worth mentioning that a part of the joint seam 231 is formed by a wedge-shaped convex portion 235 and a wedge-shaped groove correspondingly engaged with the wedge-shaped convex portion 235, so that the joint strength at the joint seam 231 can be increased.

Specifically, the metal inner casing 2 includes a bottom wall 21, two side walls 22 respectively bent upwardly on two sides of the bottom wall 21, and two end walls 22 extending from the top ends of the side walls 22 and joined together. A top wall 23. The joint seam 231 and the receiving recess 233 are formed on the top wall 23 . The receiving recess 233 is located at the rear end of the top wall 23, which is a square notch recessed forward from both sides of the joint slit 231. Two fixing protrusions 28 are provided on the bottom wall 21. Two fixing protrusions 28 are provided on the top wall 23.

When the terminal block 1 and the metal inner casing 2 are mounted in position, the rear end of the metal inner casing 2 substantially coincides with the position of the potting 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 of the receiving cavity 29.

Referring to Figures 3, 6, and 7, 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 can integrally surround the protruding portion 116 of the terminal block 1 projecting rearwardly from the metal inner casing 2, thereby preventing 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 preferably laser welded to the metal inner casing 2. The metal casing 3 includes a body 31 and a reinforcing shield structure 32 extending from the body 31.

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

The reinforcing shield structure 32 includes a first vertical extending portion 321 which is bent downwardly from the rear end of the top wall 311 of the main body 31, and a horizontal end extending from the bottom end of the first vertical extending portion 321 An extension portion 322, and a second vertical extension portion 323 further bent downwardly at a rear end of the horizontal extension portion 322. The reinforcing shield structure 32 can matingly surround the projection 116 therein, thereby preventing leakage of electromagnetic radiation from the conductive terminal 12.

Referring to Fig. 3, 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 backward. The sealing ring 4 is matched with an outer casing of the electronic device (not shown, such as a mobile phone case), and the structure can well prevent the external water droplets from penetrating backward along the bonding gap between the electrical connector 10 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 insulative housing 11 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 achieving the purpose of improving the waterproof performance of the connector. The waterproof rubber 5 is preferably further filled in the front half of the glue filling channel 115 for sealing the micro cracks formed between the conductive terminals 12 and the insulating body 11 due to different materials, under thermal expansion and contraction, and preventing seepage. Leakage can meet higher levels of waterproofing requirements.

Specifically, the waterproof rubber 5 can also correspond to the receiving notch 233 on the metal inner casing 2 and penetrate forward along the joint slit 231 on the metal inner casing 2 to seal the metal inner casing 2 and the insulating body 11 in a sealed manner. Together. It can be understood that, on the one hand, the receiving recess 233 on the metal inner casing 2 functions as a glue pool, and can accumulate a sufficient amount of glue to meet the need of the forward penetration sealing joint 231; on the other hand, through the waterproof rubber 5 The concave-convex fitting structure of the correspondingly formed protrusion 52 and the receiving notch 233 can also enhance the bonding strength between the waterproof rubber 5 and the metal inner casing 2.

Referring to FIG. 3 and FIG. 5, the waterproof film 6 covers the outer side of the receiving recess 233 on the metal inner casing 2 for preventing the waterproof rubber 5 from flowing outward from the receiving recess 233, thereby ensuring that the waterproof rubber 5 can penetrate forward. The joint seam 231 is closed to prevent water droplets in the receiving chamber 29 from penetrating into the inside of the electronic device (not shown) via the receiving recess 233, thereby adversely affecting the circuit board 20 and peripheral components. In the present embodiment, the waterproof film 6 is preferably an insulating polyester film (Mylar). The waterproof film 6 covers the outside of the top wall 21 of the metal inner casing 2, and is pressed against the top side of the metal inner casing 2 by the metal casing 3.

The manufacturing and assembly process of the electrical connector 10 generally includes the following steps: combining the insulating body 11 and the conductive terminal 12 by a method of embedding the mold to obtain the terminal block 1; the metal inner casing 2 is sleeved and fixed to the terminal block The outer periphery of the first embodiment; the waterproof film 6 is covered on the outer side of the top wall 23 of the metal inner casing 2, and the receiving recess 233 is covered from above; the waterproof rubber 5 is applied to the rear end surface of the base 112 of the terminal block 1, and filled to the filling The glue channel 115; the metal casing 3 is mounted on the metal inner casing 2; the metal casing 3 and the metal inner casing 2 are laser welded together; finally, the sealing ring 4 is attached to the front end of the metal inner casing 2.

Compared with the prior art, the electrical connector 10 of the present invention is sealed by welding on the joint slit 231 of the metal inner casing 2, and a receiving recess 233 is formed at the rear end of the joint slit 231, and the metal is sealed by the waterproof rubber 5. a matching gap between the rear end of the inner casing 2 and the joint of the terminal block 1 fills the receiving recess 233 and penetrates forward along the joint slit 231, thereby sufficiently sealing the joint slit 231 to prevent leakage; The sealing ring 4 seals the joint gap between the electrical connector 10 and the electronic device, so that a better waterproof sealing effect can be achieved.

Referring to FIG. 8 to FIG. 11, the present invention also proposes another waterproof USB type-C electrical connector 10a, which differs from the foregoing electrical connector 10 mainly in the structure of the metal casing 3a and the metal casing 3. Differences. Specifically, in the metal casing 3, the main body 31 and the reinforcing shield structure 32 are integrally formed; and in the metal casing 3a, the main body 31a and the reinforcing shield structure 32a are two independent structures, and the reinforcing shield structure 32a and the main body are reinforced. 31a is integrated into one by welding.

In the present embodiment, the main body 31a is similar in structure to the main body 31 except that a relief groove 318a is formed on the upper side of the central portion of the side wall 312a of the main body 31a. The reinforcing shielding structure 32a is similar to the structure of the reinforcing shielding structure 32, except that the two sides of the horizontal extending portion 322a on the reinforcing shielding structure 32a are respectively bent downward to extend the two welding legs 324a. The two soldering legs 324a are respectively disposed on the outer side of the two side walls 312a after passing through the two relief grooves 318a of the main body 31a, and then the corresponding soldering legs 324a and the side walls 312a are fixedly coupled together by laser welding.

It should be noted that, in this embodiment, since the main body 31a and the reinforcing shielding structure 32a are separated structures, there is no case where the reinforcing shielding structure 32a hinders the application of the waterproof rubber 5, and the main body 31a can be welded to the metal. The inner casing 2a directly covers the outer side of the receiving recess 233a of the inner metal shell 2a by the main body 31a of the metal outer casing 3, and then applies the waterproof rubber 5, and then the reinforcing shield structure 32a is welded, thereby eliminating the aforementioned The waterproof membrane 6 in the electrical connector 10.

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, 10a‧‧‧ electrical connectors
20‧‧‧ boards
2‧‧‧ terminal block
11‧‧‧Insulation body
112‧‧‧Base
114‧‧‧ tongue plate
115‧‧‧Glue channel
116‧‧‧diffuse
12‧‧‧Electrical terminals
2, 2a‧‧‧ metal inner shell
21‧‧‧ bottom wall
22‧‧‧ side wall
23‧‧‧ top wall
231‧‧‧ joint seam
233, 233a‧‧‧ containment gap
235‧‧‧Wedges
28‧‧‧ holding bulge
29‧‧‧ containment chamber
3, 3a‧‧‧ metal casing
31, 31a‧‧‧ subjects
311‧‧‧ top wall
312‧‧‧ side wall
313, 315‧ ‧ welding feet
318a‧‧‧ escaping slot
32, 32a‧‧‧ Strengthen the shielding structure
321‧‧‧First vertical extension
322, 322a‧‧‧ horizontal extension
323‧‧‧Second vertical extension
324a‧‧‧ soldering feet
4‧‧‧Seal ring
5‧‧‧Waterproof glue
52‧‧‧Bumps
6‧‧‧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 B-B 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; Figure 8 is a perspective view of another preferred embodiment of the electrical connector and circuit board of the present invention. Figure 9 is an exploded perspective view of the electrical connector of Figure 8. Fig. 10 is a further exploded perspective view of Fig. 9; Figure 11 is a further exploded perspective view of Figure 10.

10‧‧‧Electrical connector

20‧‧‧ boards

1‧‧‧ terminal block

11‧‧‧Insulation body

112‧‧‧Base

114‧‧‧ tongue plate

116‧‧‧diffuse

12‧‧‧Electrical terminals

2‧‧‧Metal inner shell

29‧‧‧ containment chamber

3‧‧‧Metal casing

313, 315‧ ‧ welding feet

4‧‧‧Seal ring

5‧‧‧Waterproof glue

6‧‧‧Waterproof membrane

Claims (10)

An electrical connector includes: a terminal block including an insulative housing and a plurality of conductive terminals fixed to the insulative housing; a metal inner casing formed by punching and bending to form a front and rear through for receiving the terminal block a receiving cavity, the metal inner casing is formed with a joint seam and a receiving gap at the rear end of the joint seam, the joint seam is sealed by welding; a metal shell is mounted on the outer circumference of the metal inner shell, the metal The outer casing extends downwardly from the plurality of welding legs; a sealing ring circumferentially disposed at the front end of the metal inner casing; and a waterproof rubber applied to the rear end of the receiving cavity, wherein the waterproof rubber is filled in the receiving gap Internally, and infiltrated forward along the joint seam, the metal inner casing is sealingly joined to the insulating body. 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 inner wall of the inner metal shell is fitted to the ground, and the protruding portion protrudes rearward from the receiving cavity. The electrical connector of claim 2, wherein the metal casing comprises a body and a reinforcing shield structure, the body is welded to the metal inner casing, the reinforcing shielding structure surrounding the outer periphery of the protruding portion of the insulating body; 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 a welding leg extending further downward from the two side walls. The electrical connector of claim 3, wherein the reinforcing shield structure of the metal casing comprises: a first vertical extension extending downwardly from a rear end of the top wall of the main body, the first vertical extension being extended a horizontal extension extending further rearward of the portion, and a second vertical extension further extending downwardly at a rear end of the horizontal extension. The electrical connector of claim 3, wherein the body and the reinforcing shield structure are independent of each other, and the two are joined together by welding; wherein the body correspondingly covers the receiving recess on the metal inner casing from the outside. The electrical connector of claim 5, wherein both sides of the reinforcing shield structure are bent downward to extend two soldering legs, and the two soldering legs are correspondingly attached to both sides of the body and joined together by soldering. . 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 plurality of conductive terminals are embedded and fixed to the insulating body. Partially exposed to the potting channel, the waterproof glue is filled in the potting channel. The electrical connector of claim 1, further comprising: a waterproof film attached to the outer side of the metal inner casing and correspondingly covering the receiving recess on the metal inner casing. The electrical connector of any one of claims 1 to 8, wherein the metal inner casing comprises a bottom wall, two side walls respectively bent upwardly from two sides of the bottom wall, and the two side walls a top wall extending and engaging to form a top wall; the joint seam is located at the joint of the top wall and extends in the front-rear direction, wherein a portion of the joint is formed by a wedge-shaped protrusion and a corresponding fit with the wedge-shaped protrusion The wedge-shaped groove is formed by the joint. The electrical connector of claim 9, wherein the receiving notch is located at a rear end of the top wall of the metal inner casing, which is a square notch that is recessed forward from both sides of the joint.