CN107248637B

CN107248637B - Electric connector

Info

Publication number: CN107248637B
Application number: CN201710630273.8A
Authority: CN
Inventors: 胡兵波; 茆玉龙
Original assignee: Smart Chip Microelectronic Co ltd
Current assignee: Smart Chip Microelectronic Co ltd
Priority date: 2017-07-28
Filing date: 2017-07-28
Publication date: 2023-12-22
Anticipated expiration: 2037-07-28
Also published as: CN107248637A

Abstract

The invention provides an electric connector, which comprises an insulating body, a plurality of conductive terminals fixed in the insulating body, a locking piece capable of locking a butt joint connector and a shielding shell covered outside the insulating body, wherein the insulating body is provided with an accommodating space for inserting the butt joint socket connector, the conductive terminals comprise a first terminal group and a second terminal group which are arranged in two rows along the height direction, the first terminal group and the second terminal group are correspondingly and reversely arranged, each conductive terminal is provided with an elastic contact arm protruding into the accommodating space, a fixing part fixed in a terminal groove of the insulating body and a tail part extending backwards from the fixing part and protruding out of the rear end face of the insulating body, and the rear end face of the insulating body is positioned in front of the rear surface of the shielding shell in the front-rear direction so as to form an accommodating groove for entering waterproof glue between the rear end face and the rear surface. The electric connector has good waterproof effect.

Description

Electric connector

Technical Field

The present invention relates to the field of connectors, and more particularly, to a reversible electrical connector.

Background

With the rapid development of science and technology in the electronic industry, the volume of electronic products is developed along the trend of being lighter, thinner and smaller, and the component sizes of the electronic products are required to be smaller, and the connector industry is the first place.

This results in better mechanical performance requirements and higher product design difficulties due to the smaller size of the new generation USB Type-C connector. In order to face lighter, thinner and finer equipment and ensure the reliability of the product structure, various manufacturers put forward corresponding structural designs in a dispute.

An existing USB Type-C plug connector includes an insulating body, two rows of conductive terminals fixed in the insulating body and a locking member located between the two rows of conductive terminals along a height direction, however, when the inserted locking member and the conductive terminals are assembled in the insulating body, and when the insulating body and the shielding shell are assembled, an assembly gap exists, so that the waterproof performance of the USB Type-C connector is a big problem to be solved in design.

Accordingly, there is a need to provide an improved electrical connector that overcomes the above-described problems.

Disclosure of Invention

The invention aims to provide an electric connector which can be effectively waterproof.

In order to achieve the above object, the present invention provides an electrical connector, which includes an insulating body, a plurality of conductive terminals fixed in the insulating body, a latch member capable of latching the mating connector, and a shielding housing wrapped outside the insulating body, wherein the insulating body has a receiving space into which the mating socket connector is inserted, the conductive terminals are mounted from the rear to the front and include a first terminal group and a second terminal group disposed in two rows along a height direction, the first terminal group corresponds to the second terminal group and are oppositely arranged, each of the conductive terminals has an elastic contact arm protruding into the receiving space, a holding portion fixed in a terminal groove of the insulating body, and a tail portion extending rearward from the holding portion and protruding out of a rear end surface of the insulating body, the rear end surface of the insulating body is located in front of a rear surface of the shielding housing so as to form a receiving groove into which a waterproof adhesive enters between the rear end surface and the rear surface, the front end of the tail portion is connected with a corresponding holding portion of the terminal group in a height direction, the latch member is disposed in a pair of the receiving groove and is disposed in a height direction opposite to the receiving groove, and the latch member is disposed in a mating manner to the two sides of the receiving groove are respectively.

As a further improvement of the present invention, the insulating body has a main body portion, a butt joint portion provided in front of the main body portion, and an installation portion located behind the main body portion and protruding outward, and the top and bottom surfaces of the installation portion are respectively provided with at least one bump so as to form a gap between the top and bottom surfaces of the installation portion and corresponding upper and lower inner wall surfaces of the shielding case.

As a further improvement of the present invention, the shielding housing includes a frame portion and an extension portion extending rearward from the frame portion, and the extension portion is an enlarged structure integrally formed by expanding outward from the frame portion.

As a further improvement of the invention, the frame body part is sleeved outside the main body part and the butt joint part, the extension part is sleeved outside the installation part, and a certain interval space is arranged between the front end of the installation part and the front inner wall surface of the extension part.

As a further improvement of the invention, the latching members are a pair of oppositely arranged, and the pair of latching members are transversely arranged at two sides of the conductive terminal, wherein each latching member is provided with a base part, a latching arm positioned at the front end of the base part, a fixing part fixedly matched with the insulating body and a connecting part positioned at the rear end of the insulating body, the latching arm extends forwards from the front end of the base part, and the latching arms and the connecting parts are oppositely arranged at two ends of the latching members in the front-rear direction.

As a further improvement of the present invention, the connecting portion has at least one grounding portion extending rearward beyond the rear end face of the insulating body and at least one mating portion extending in the height direction, the mating portion being located in front of the grounding portion in the front-rear direction.

As a further improvement of the present invention, the fixing portion is provided near the connecting portion and has a convex portion protruding from an inner surface thereof toward the other locking piece, and a front side of the convex portion is locked to a corner portion provided inside the mounting portion.

As a further improvement of the invention, through grooves extending along the front-rear direction are respectively arranged on two sides of the insulating body, the locking piece is inserted into the corresponding through groove of the insulating body from rear to front, and the convex part seals the corresponding through groove at the rear end of the corresponding side through groove.

The beneficial effects of the invention are as follows: the rear part of the electric connector is provided with the containing groove for the waterproof glue to enter and wrap the tail part of the terminal and the locking piece, so that the waterproof effect and the waterproof grade of the electric connector are improved.

Drawings

FIG. 1 is a perspective assembly view of an electrical connector of the present invention;

FIG. 2 is another view of the electrical connector of FIG. 1;

fig. 3 is an exploded perspective view of the electrical connector of fig. 1;

FIG. 4 is another view of the electrical connector of FIG. 3;

FIG. 5 is a perspective assembly view of the electrical connector of FIG. 4 with the shielding housing removed;

fig. 6 is a rear view of the electrical connector of fig. 1;

fig. 7-8 are schematic cross-sectional views of the electrical connector of fig. 2 taken along line A-A;

fig. 9 is a schematic cross-sectional view of the electrical connector of fig. 2 taken along line B-B.

Detailed Description

The present invention will be described in detail below with reference to the embodiments shown in the drawings. These embodiments are not intended to limit the invention and structural, methodological, or functional modifications of these embodiments that may be made by one of ordinary skill in the art are included within the scope of the invention.

Referring to fig. 1 to 9, an electrical connector 100 according to a preferred embodiment of the invention is shown, wherein the electrical connector 100 includes an insulative housing 1, a plurality of conductive terminals 2 fixed in the insulative housing 1, a locking member 3, a shielding housing 4 covering the insulative housing 1, and a circuit board (not shown) disposed behind the insulative housing 1 and electrically connected to the conductive terminals 2.

Referring to fig. 3 to 8, the insulating body 1 includes a main body 11, a mating portion 12 disposed in front of the main body 11, and an installation portion 13 disposed behind the main body 11 and protruding outward, wherein the main body 11, the mating portion 12, and the installation portion 13 are all configured in an elliptical column shape as a whole, and an accommodating space 120 disposed in a forward open manner is formed on an inner side of the mating portion 12 for forward or reverse insertion of the mating socket connector. A plurality of terminal grooves 10 are respectively arranged on the inner sides of the top wall and the bottom wall of the insulating body 1, and the terminal grooves 10 extend forwards from the rear end surface 130 of the insulating body 1 to the inner side of the abutting part 12 and are communicated with the accommodating space 120; meanwhile, the terminal groove 10 does not penetrate the insulating body 1 in the height direction. In this embodiment, the terminal receiving grooves 10 provided on the top wall of the insulating body 1 correspond to the corresponding terminal grooves 10 on the bottom wall in the height direction but are not in communication, i.e., are independent of each other.

The front side of the mounting portion 13 is connected to the main body portion 11, and the top and bottom surfaces thereof are located outside the corresponding top and bottom surfaces of the main body portion 11, respectively, so that the front end surface of the mounting portion 13 is exposed forward. At least one protruding block 131 protruding outwards is respectively disposed on the top surface and the bottom surface of the mounting portion 13, and in this embodiment, a pair of protruding blocks 131 are respectively disposed on the top surface and the bottom surface. The mounting portion 13 is recessed forward from the rear end face 130 thereof to form a pair of grooves 132, the grooves 132 being disposed opposite to both sides in the lateral direction of the mounting portion 13 and disposed near the side end portions of the mounting portion 13, while the grooves 132 extend in the height direction and penetrate the mounting portion 13.

The two sides of the insulating body 1 are respectively provided with a through groove 14 extending in the front-rear direction and a notch 15 located in front of the corresponding through groove 14, the through groove 14 extends forward from the rear end surface 130 of the mounting portion 13 to be communicated with the notch 15, the through groove 14 is located at the corresponding positions of the two sides of the main body 11 and the mounting portion 13 in the transverse direction, and in addition, the through groove 14 is communicated with the corresponding groove 132 located at the rear side thereof.

Referring to fig. 2 to 6, the conductive terminals 2 include a first terminal set 21 and a second terminal set 22 arranged in two rows along the height direction, and the first terminal set 21 and the second terminal set 22 are correspondingly and reversely arranged. The first terminal set 21 includes a pair of ground terminals 20a, a pair of power terminals 20b, a detection terminal 20c (CC 1 for detecting the function of positive and negative insertion and identifying the function of CABLE) and a pair of signal terminals 20d, and the detection terminal 20c and the pair of signal terminals 20d are located in the middle of the first terminal set 21, i.e. between the pair of power terminals 20b, the pair of ground terminals 20a are located at the outermost side, and the pair of power terminals 20b are located at the outer side of the detection terminal 20c or the signal terminal 20 d. In the present embodiment, the second terminal group 22 is different from the first terminal group 21 in that the second terminal group 22 is provided with less one pair of signal terminals 20d (as shown in fig. 6).

Each of the conductive terminals 2 has an elastic contact arm 201 protruding into the accommodating space 120, a holding portion 202 fixed in the terminal slot 10 of the insulating body 1, and a tail portion 203 extending backward from the holding portion 202 and protruding out of the insulating body 1, wherein the contact arms 201 are disposed on the upper side and the lower side of the accommodating space 120 in two rows.

In this embodiment, the contact arm 201 protrudes upward or downward into the accommodating space 120, and has a contact portion 2011 at a free end thereof, and the contact portion 2011 protrudes toward the corresponding contact arm 201 in the other row to clamp a tongue piece (not shown) of a mating connector between the contact portions 2011. The top or bottom of the tail portions 203 protrude toward the opposite tail portions 203 to form a holding portion 2031, and the holding portion 2031 is disposed near the rear end of the conductive terminal 2, so that the holding portions 2031 of the tail portions 203 of the upper and lower rows protrude toward each other to sandwich a circuit board (not shown) therebetween.

Meanwhile, the terminal groove 10 corresponds to the contact portion 2011 of the conductive terminal 2 up and down, so as to provide a space for the contact portion 2011 of the conductive terminal 2 to float outwards, which is convenient for plugging the mating connector. The contact portions 2011 of the first terminal set 21 and the second terminal set 22 are arranged at the same positions on the insulating body 1 as the butt joint portions of the corresponding terminals on the standard USB Type-C plug connector.

In the present embodiment, each conductive terminal in the first terminal group 21 is provided separately from each conductive terminal in the second terminal group 22 to constitute conductive terminals independent of each other. In other embodiments, the holding portions 202 of the ground terminal 20a and the power terminal 20b in the first terminal set 21 may be integrally connected with the holding portions 202 of the corresponding conductive terminals in the second terminal set 22 in the height direction, so as to form a conjoined terminal.

When assembled, the first terminal set 21 and the second terminal set 22 are assembled and fixed in the corresponding terminal groove 10 of the insulating body 1 from back to front, respectively. The front ends of the contact arms 201 of the ground terminal 20a and the power terminal 20c are flush with the front ends of the detection terminals 20d in the same row of terminal groups in the transverse direction, and the distances between the contact portions 2011 of the two opposite conductive terminals 2 in the two rows of terminal groups are the same.

The locking members 3 are made of metal, in this embodiment, the locking members 3 are a pair of opposite locking members 3, and the pair of locking members 3 are laterally disposed on two sides of the conductive terminal 2, where each locking member 3 has a base 31, a locking arm 32 at a front end thereof, a fixing portion 33 in interference fit with the mounting portion 13 of the insulating body 1, and a connecting portion 34 at a rear end thereof. The latch arms 32 extend forward from the front end of the base 31, and are disposed at both ends of the latch 3 in the front-rear direction opposite to the connecting portions 34.

In the present embodiment, the fixing portion 33 is provided close to the connecting portion 34, and has a convex portion 331 protruding from an inner surface thereof toward the other catch piece 3 and interference portions 332 protruding outward from both sides thereof in the height direction; the convex portion 331 extends obliquely forward and inward to be interference-fitted with the mounting portion 13 at the inner side thereof, and is interference-fitted with the mounting portion 13 through both sides of the interference portion 332 in the height direction thereof.

The connecting portion 34 has at least one grounding portion 341 extending rearward beyond the rear end face 130 of the insulating body 1 and at least one mating portion 342 extending in the height direction, the mating portion 342 being located forward of the grounding portion 341 in the front-rear direction. In this embodiment, each locking member 3 has a vertically symmetrical structure, a pair of grounding portions 341 disposed opposite to each other in the height direction are disposed at the rear end of the locking member, and each locking member has a pair of mating portions 342 disposed opposite to each other and extending in opposite directions on the upper and lower sides of the locking member, and an abutment surface 3421 is formed at the front end of each mating portion 342. In other embodiments, the engaging portion 342 may also extend outward in other directions, such as outward in a lateral direction, so long as the contact surface 3421 at the front end of the engaging portion 342 contacts the rear surface of the shielding housing 4. In this embodiment, the extending direction of the groove 132 coincides with the extending direction of the mating portion 342.

In addition, the free end of the mating portion 342 in the height direction is provided with a chamfer 3422, and the chamfer 3422 is located outside the free end of the mating portion 342, so that the front projection of the outer side of the mating portion 342 when viewed from the back to the front is located inside the front projection of the shielding shell 4 (as shown in fig. 6), in other embodiments, the outer side of the free end of the mating portion 342 in the height direction may not be a chamfer, but may be any type of notch, so long as the front projection of the mating portion 342 when viewed from the back to the front falls completely inside the front projection of the shielding shell 4, and does not exceed the outline (i.e. the outer edge) of the extension portion 42 of the shielding shell 4, so that no metal convex hull exists when the insulating shell (not shown) is formed outside the electrical connector 100, and the insulating shell is formed more easily and the yield is higher.

When the locking member 3 is assembled into the insulating body 1, the locking member 3 is inserted into the corresponding through slot 14 of the insulating body 1 from the back to the front, wherein the locking arms 32 pass through the corresponding through slot 14 and are exposed in the notches 15 on two sides of the insulating body 1 in the transverse direction so as to be locked and held with the mating connector. The base 31 is limited in the portion of the through groove 14 located inside the main body 11, and the fixing portion 33 is accommodated in the portion of the through groove 14 located inside the mounting portion 13 and is in interference fit with the mounting portion 13, wherein the front side of the protruding portion 331 is locked in a corner portion 133 (as shown in fig. 9) provided inside the mounting portion 13, and is sealed at the rear end of the corresponding side through groove 14.

The grounding portion 341 is exposed at the rear side of the rear end surface 130 of the mounting portion 13 to be mechanically and electrically connected to the circuit board (not shown), so that the locking member 3 not only can lock the mating connector, but also has a grounding effect.

The front end of the shielding shell 4 is provided with an oval butt joint frame opening which is consistent with the butt joint frame opening of the standard USB Type-C plug connector and is used for being matched with the positive and negative insertion of the butt joint socket connector, and the shielding shell has the advantage of convenience in use, wherein both positive and negative insertion is applicable. The shielding shell 4 is a seamless structure formed by drawing, and comprises a frame 41 and the extension portion 42 extending rearward from the frame 41, in this embodiment, the extension portion 42 is an expanded structure formed by integrally expanding outward from the frame 41, wherein the height of the extension portion 42 is greater than the height of the frame 41, and the distance of the extension portion 42 expanding outward in the height direction is greater than the distance of the extension portion expanding outward in the transverse direction.

The shielding shell 4 is sleeved outside the insulating body 1 from front to back, wherein the frame body 41 is sleeved outside the main body 11 and the butt joint part 12, the extension part 42 is sleeved outside the mounting part 13, and a certain interval space is formed between the front end of the mounting part 13 and the front inner wall surface of the extension part 42; meanwhile, the rear end surface 130 of the insulating body 1 is located in front of the rear surface 420 of the extension 42 in the front-rear direction, so that a receiving groove 421 is formed inside the extension 42 and between the rear end surface 130 and the rear surface 420. The front end of the tail portion 203 of the conductive terminal 2 forms a step portion 2032 connected to its corresponding holding portion 202, and the step portion 2032 is located in the accommodation groove 421. Since the top and bottom surfaces of the mounting portion 13 are provided with the protrusions 131, respectively, gaps are also formed between the top and bottom surfaces of the mounting portion 13 and the corresponding upper and lower inner wall surfaces of the extension portion 420.

The abutting surface 3421 of the front side of the mating part 342 of the latch 3 is abutted forward against the rear surface 420 of the extension part 42, so that the mating part 342 is overlapped with the rear surface of the shielding shell 4, and the latch 3 is prevented from being inserted too deeply or not in place when the insulating body 1 is inserted by the limiting action of the rear surface 420 of the shielding shell 4; in addition, the overlapping manner of the abutting joint between the abutting surface 3421 and the rear surface 420 may be mechanical connection, or may be laser welding or the like, so as to further ensure effective contact between the locking member 3 and the shielding shell 4.

When the rear side of the electric connector 100 is subjected to waterproof treatment, waterproof glue is filled into the accommodating groove 421 and the groove 132 inside the extension part 42 so as to wrap the rear end of the holding part 202, the step part 2032 of the tail part 203 and the side part of the rear section of the locking piece 3, thereby realizing the sealing and waterproof of the rear parts of the conductive terminal 2, the locking piece 3, the insulating body 1 and the shielding shell 4 and enhancing the reliable combination between the conductive terminal 2 and the locking piece 3; meanwhile, the waterproof glue injected from the rear side of the housing is permeated forward into the gaps between the top and bottom surfaces of the mounting portion 13 and the upper and lower inner wall surfaces of the extension portion 420 and the space in front of the mounting portion 13, so as to realize the waterproof effect of the corresponding assembly gap position of the shielding housing 4 and the insulating body 1, and improve the waterproof effect and waterproof grade of the electrical connector 100.

It should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is for clarity only, and that the skilled artisan should recognize that the embodiments may be combined as appropriate to form other embodiments that will be understood by those skilled in the art.

The above list of detailed descriptions is only specific to practical embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the spirit of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides an electric connector, its includes the insulator, be fixed in a plurality of conductive terminal in the insulator, but locking piece of hasp butt joint connector and cladding in the outer shielding shell of insulator, the insulator has the accommodation space that can supply butt joint socket connector to insert, conductive terminal is from backward forward packing into the insulator and including the first terminal group and the second terminal group that are two rows of setting along the direction of height, first terminal group is corresponding and the reverse arrangement of second terminal group, each conductive terminal has the elasticity contact arm that stretches into accommodation space, the retainer in the terminal groove of insulator and the afterbody that extends backward and stretch out the rear end face of insulator outward from the retainer, its characterized in that: in the front-back direction, the rear end face of the insulating body is located in front of the rear surface of the shielding shell, so that an accommodating groove for the entry of waterproof glue is formed inside the shielding shell and between the rear end face and the rear surface, the front end of the tail part forms a step part connected with a corresponding fixing part, the step part is located in the accommodating groove, so that the waterproof glue is filled into the accommodating groove and wraps the step part, the locking piece is provided with a pair of matching parts extending along the height direction, the matching parts are located at the upper side and the lower side of the locking piece respectively and oppositely arranged and reversely extend, and the front end of the matching part is provided with an abutting surface abutting against the rear surface of the shielding shell.

2. The electrical connector of claim 1, wherein: the insulating body is provided with a main body part, a butt joint part arranged in front of the main body part and an installation part which is positioned behind the main body part and protrudes outwards, wherein the top and the bottom of the installation part are respectively provided with at least one lug so as to form a gap between the top and the bottom of the installation part and the corresponding upper and lower inner wall surfaces of the shielding shell.

3. The electrical connector of claim 2, wherein: the shielding shell comprises a frame body and an extension part extending backwards from the frame body, and the extension part is of an expansion structure formed by integrally expanding the frame body outwards.

4. The electrical connector of claim 3, wherein: the frame body part is sleeved outside the main body part and the butt joint part, the extension part is sleeved outside the installation part, and a certain interval space is formed between the front end of the installation part and the front inner wall surface of the extension part.

5. The electrical connector of claim 4, wherein: the locking pieces are a pair of oppositely arranged, and the pair of locking pieces are transversely arranged on two sides of the conductive terminal, wherein each locking piece is provided with a base part, a locking arm arranged at the front end of the base part, a fixing part fixedly matched with the insulating body and a connecting part arranged at the rear end of the base part, the locking arm extends forwards from the front end of the base part, and the locking arms and the connecting parts are oppositely arranged at two ends of the locking pieces in the front-rear direction.

6. The electrical connector of claim 5, wherein: the connecting part is provided with at least one grounding part extending backwards beyond the rear end face of the insulating body and at least one matching part extending along the height direction, and the matching part is positioned in front of the grounding part in the front-back direction.

7. The electrical connector of claim 5, wherein: the fixing part is arranged close to the connecting part and is provided with a convex part protruding from the inner surface of the fixing part towards the other locking piece, and the front side of the convex part is blocked at a corner part arranged inside the mounting part.

8. The electrical connector of claim 7, wherein: the insulation body is characterized in that through grooves extending along the front-back direction are respectively formed in two sides of the insulation body, the locking piece is inserted into the corresponding through groove of the insulation body from back to front, and the protruding part seals the corresponding through groove at the rear end of the corresponding side through groove.