CN110311243A - electrical connector - Google Patents

Abstract

The invention provides an electrical connector, which includes an insulating body, a plurality of conductive terminals fixed in the insulating body, and a shielding shell covered outside the insulating body, and the conductive terminals include two The first terminal group and the second terminal group arranged in rows, the insulating body includes a base, an upper body and a lower body assembled to the base, and the first terminal group and the second terminal group are respectively embedded and fixed on the In the upper body and the lower body to form an upper terminal assembly and a lower terminal assembly, the upper terminal assembly and the lower terminal assembly are inserted into the base after being assembled in the height direction, and the base has oppositely arranged A top wall and a bottom wall, the top and bottom walls extend backward beyond the rear end surfaces of the upper and lower bodies. The electrical connector of the invention has good structural reliability.

Description

electrical connector

technical field

The invention relates to an electrical connector.

Background technique

With the rapid development of science and technology in the electronics industry, the volume of electronic products is developing along the trend of becoming thinner and shorter, which requires the components of electronic products to be smaller and smaller, and the connector industry is the first to bear the brunt .

Due to the requirement for a smaller size of the new generation of USB Type-C connectors, this leads to better mechanical performance requirements and more difficult product design. In order to face thinner and thinner equipment and ensure the reliability of product structure, major manufacturers have launched corresponding structural designs.

The existing USB Type-C plug connector usually includes an upper terminal module, a central shield, a lower terminal module, an insulating body, a lower shielding plate, an upper shielding plate and a shielding shell, and the lower terminal module includes a lower insulating member and a plurality of lower conductive terminals embedded with the lower insulating part, the upper terminal module includes an upper insulating part and a plurality of upper conductive terminals embedded with the upper insulating part, and the central shielding part is sandwiched between the lower terminal module and the upper terminal Between the modules, the lower terminal module and the upper terminal module are installed in the insulating body, the lower shielding plate and the upper shielding plate are respectively arranged on the bottom surface and the surface of the insulating body, and the shielding shell covers the insulating body.

Wherein, the central shielding part is clamped and positioned between the upper and lower terminal modules, and the three are then installed into the insulating body. The structure is complex and there are many assembly parts, which leads to a decrease in the strength of the inserted component. At the same time, the three-layer structure is also easy to cause Accumulated tolerances and poor structural stability reduce product reliability.

In view of this, it is necessary to improve the existing electrical connectors to solve the above problems.

Contents of the invention

The purpose of the present invention is to provide an electrical connector with higher reliability.

In order to achieve the purpose of the above invention, the present invention provides an electrical connector, which has an insulating body, a number of conductive terminals fixed in the insulating body and a shielding shell covered outside the insulating body, the conductive terminals It includes a first terminal group and a second terminal group arranged in two rows along the height direction, the insulating body includes a base, an upper body and a lower body assembled to the base, the first terminal group and the second terminal The groups are respectively embedded and fixed in the upper body and the lower body to form an upper terminal assembly and a lower terminal assembly. The upper terminal assembly and the lower terminal assembly are inserted into the base after being assembled along the height direction, and the base has A top wall and a bottom wall oppositely arranged along the height direction, and the top and bottom walls extend backward beyond the rear end surfaces of the upper and lower bodies.

As a further improvement of the present invention, the electrical connector also has a locking member assembled on the insulating body. When the upper and lower terminal assemblies are assembled in the height direction and inserted into the base, the lock The fastener is inserted into the base from back to front.

As a further improvement of the present invention, the base has an installation space formed by being recessed from the back to the front and a pair of slots separated on both sides of the base in the transverse direction, and the pair of slots are respectively lateral It is open to the outside and communicates with the installation space. The locking member is clamped between the upper terminal assembly and the lower terminal assembly and a pair of locking arms on both sides thereof are accommodated in corresponding slots.

As a further improvement of the present invention, the upper body and the lower body are respectively provided with at least one positioning portion on the sides facing away from each other in the height direction, and the top wall and the bottom wall are respectively provided with at least one positioning hole, and the positioning portion Cooperate with corresponding positioning holes to fix the upper and lower bodies in the base.

As a further improvement of the present invention, the top and bottom walls respectively have guide surfaces at least partially protruding from the rear side of the rear end surface.

As a further improvement of the present invention, each of the guide surfaces extends obliquely to the rear surface of the top/bottom wall along a direction arranged at an angle to the horizontal direction, and a pair of guide surfaces are oppositely arranged to form a larger rear opening Trumpet-shaped guide cavity.

As a further improvement of the present invention, the upper and lower bodies each have a joint section located on the front side and an extension section located on the rear side, the joint sections of the upper and lower bodies are stacked along the height direction, and the upper and lower bodies The extension sections are arranged at intervals along the height direction to form a receiving space between them.

As a further improvement of the present invention, the locking member includes a crossbeam, the pair of locking arms extending forward from the crossbeam, and a rear surface extending backward from the crossbeam beyond the insulating body for soldering to the circuit board The welding leg on the upper body, the beam is sandwiched between the extensions of the upper and lower bodies to be positioned in the receiving space.

As a further improvement of the present invention, in the lateral direction, the upper and lower bodies are sandwiched between the pair of locking arms, and the two sides of the coupling section in the lateral direction respectively protrude outward to form a protrusion. The platform protrudes into the slot.

As a further improvement of the present invention, each of the locking arms has a locking protrusion and a protrusion protruding toward the other locking arm, and in the front-rear direction, the protrusion is located between the locking protrusion and the between the beams and abuts against the base inwardly.

Beneficial effects of the present invention: the electrical connector of the present invention assembles and stacks the upper and lower terminal assemblies along the height direction and then puts them into the base together, and the base forms a fully enclosed structure on the upper and lower bodies, thereby ensuring electrical Structural stability of the connector.

Description of drawings

FIG. 1 is a three-dimensional assembled view of the electrical connector of the present invention.

FIG. 2 is a view from another perspective of the electrical connector shown in FIG. 1 .

FIG. 3 is a partially exploded view of the electrical connector shown in FIG. 1 .

FIG. 4 is a further exploded view of the electrical connector shown in FIG. 3 .

FIG. 5 is a partial assembly view of the electrical connector shown in FIG. 4 with the shielding shell removed.

FIG. 6 is a further assembled view of the electrical connector shown in FIG. 5 .

FIG. 7 is a top view of a row of conductive terminals in the electrical connector shown in FIG. 3 .

FIG. 8 is a cross-sectional view of the base of the electrical connector shown in FIG. 3 .

FIG. 9 is a rear view of the electrical connector shown in FIG. 1 with the shielding shell and the locking member removed.

FIG. 10 is a cross-sectional view of the electrical connector shown in FIG. 1 .

FIG. 11 is a cross-sectional view of the electrical connector shown in FIG. 1 with the shielding shell removed.

Detailed ways

The present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings. However, this embodiment does not limit the present invention, and any structural, method, or functional changes made by those skilled in the art according to this embodiment are included in the protection scope of the present invention.

Please refer to FIG. 1 to FIG. 11, which is a preferred embodiment of the electrical connector 100 of the present invention, the electrical connector 100 includes an insulating body 1, a number of conductive terminals 2 fixed in the insulating body 1, assembled on The locking member 3 inside the insulating body 1 , the shielding case 4 covering the insulating body 1 , and a pair of metal elastic pieces 5 arranged between the insulating body 1 and the shielding case 4 .

As shown in Figures 3 to 11, the insulating body 1 has a base 11 arranged in an elliptical column shape, and an insertion space 110 is formed inside the base 11 for forward or reverse insertion of a docking socket connector. , the front part of the base 11 is provided with several terminal grooves 111 . In this embodiment, the insulating body 1 includes an upper body 12 and a lower body 13 assembled into the base 11 , and the upper body 12 and the lower body 13 are stacked and assembled along the height direction of the electrical connector 100 Inserted into the base 11 after being put together, the base 11 has a top wall 112 and a bottom wall 113 oppositely arranged along the height direction, and the top and bottom walls 112, 113 extend backward beyond the upper and lower The rear end surface 130 of the body 12 , 13 .

The outer surfaces of the top wall 112 and the bottom wall 113 are respectively provided with a receiving area 114 recessed toward the insertion space 110 and a plurality of receiving holes 115 formed therethrough. For the metal dome 5 , the receiving holes 115 communicate with the receiving areas 114 on the same side respectively. The top wall 112 and the bottom wall 113 define a pair of coupling holes 116 opposite to each other and located on two sides of the corresponding receiving area 114 .

In addition, the top and bottom walls 112 , 113 respectively have guiding surfaces 1121 , 1131 at least partially protruding from the rear side of the rear end surface 130 . Each of the guide surfaces 1121, 1131 extends obliquely to the rear surface of the top wall 112 or the bottom wall 113 along a direction arranged at an angle to the horizontal direction, and a pair of the guide surfaces 1121, 1131 are arranged opposite to each other along the height direction And form a trumpet-shaped guide cavity with an enlarged rear opening, so that the upper and lower bodies 12, 13 can be smoothly assembled into the base 11.

The top and bottom walls 112, 113 respectively have at least one protruding strip 1122 protruding from their outer surfaces, and each of the protruding strips 1122 extends along the front-to-back direction, so as to be installed in the shielding case on the base 11 Strengthen the tightness between the two after the body 4.

The base 11 also has a pair of side walls 117 connecting the top wall 112 and the bottom wall 113, and the terminal groove 111 does not penetrate the top wall 112 and the bottom wall 113 along the height direction, that is, Viewed from the upper side or the lower side, the conductive terminals 2 are not exposed outside the top wall 112 or the bottom wall 113, so there is no need to use insulating mylars on the upper and lower sides of the base 11, reducing the number of parts , the production cost of the product is reduced, and the assembly process of the electrical connector 100 is also reduced, which makes the assembly of the electrical connector 100 easier and effectively improves the production efficiency of the product.

Both sides of the base 11 are respectively provided with slots 1171 formed through the corresponding side walls 117 , and a pair of the slots 1171 are respectively opened laterally outward and recessed forward from the rear surface of the base 11 It is extended and communicated with the insertion space 110 on both sides of the base 11 laterally. The base 11 has an installation space 1103 recessed from back to front, and the pair of slots 1171 are located on two sides of the base 11 in the transverse direction and communicate with the installation space 1103 .

The upper and lower bodies 12, 13 each have a joint section 121, 131 located at the front side and an extension section 122, 132 located at the rear side, and the joint sections 121, 131 of the upper and lower bodies 12, 13 are stacked along the height direction It is provided that the extension sections 122 , 132 of the upper and lower bodies 12 , 13 are arranged at intervals along the height direction to form a receiving space 120 between them.

The upper body 12 and the lower body 13 are respectively provided with at least one positioning part 1201, 1301 on the sides facing away from each other in the height direction, and the top wall 112 and the bottom wall 113 are respectively provided with at least one positioning hole 1102. The parts 1201 , 1301 cooperate with the corresponding positioning holes 1102 to fix the upper and lower bodies 12 , 13 in the base 11 . In this embodiment, the sides of the upper body 12 and the lower body 13 facing away from each other are respectively provided with a pair of positioning portions 1201 , 1301 arranged at intervals along the transverse direction.

At the same time, the upper and lower bodies 12, 13 also have perforations 1202, 1302 through which the corresponding conductive terminals 2 can be exposed to the outside, so as to provide support for the conductive terminals 2 when molding the upper and lower bodies 12, 13. To support the positioning function, in this embodiment, at least one perforation 1202 , 1302 is provided on the upper and lower sides of the upper and lower bodies 12 , 13 .

The upper and lower bodies 12, 13 also have a pair of slots 133 recessed forward from the rear surfaces of their joining sections 121, 131, and the pair of slots (not shown in the figure) of the upper body 12 ) is aligned with and communicated with the corresponding slot 133 of the lower body 13 along the height direction.

In addition, the upper and lower bodies 12, 13 also have a fixed structure that is assembled and fixed to each other, and the fixed structure includes at least one positioning protrusion 124, 134 and a positioning groove 135 that interferes with the positioning protrusion 124, 134 . In this embodiment, each of the upper body 12 and the lower body 13 is provided with one positioning protrusion 124 , 134 and one positioning groove 135 .

The joint sections 121, 131 of the upper and lower bodies 12, 13 protrude outward on both sides in the transverse direction to form bosses 1211, 1311, and the bosses 1211, 1311 protrude into the corresponding sides of the Slot 1171 inside. Further, as shown in FIG. 10 , the bosses 1211 , 1311 located on different sides in the transverse direction have a tendency to move toward each other while extending backward.

The conductive terminal 2 includes a first terminal group 21 and a second terminal group 22 arranged in two rows along the height direction. The first terminal group 21 corresponds to the second terminal group 22 and is arranged in reverse, and is consistent with the The terminal arrangement of the USB Type C is consistent. The first terminal group 21 and the second terminal group 22 are respectively embedded and fixed in the upper body 12 and the lower body 13 to form an upper terminal assembly and a lower terminal assembly, and the upper terminal assembly and the lower terminal assembly are assembled along the height direction Afterwards, the base 11 is inserted into the base 11 . Therefore, the base 11 forms a fully enclosed structure on the upper and lower bodies 12 , 13 , thereby ensuring the structural stability of the electrical connector 100 .

The conductive terminals 2 in the first terminal group 21 are mirror images of the corresponding conductive terminals 2 in the second terminal group 22 . Each of the conductive terminals 2 has an elastic contact arm 201 protruding into the insertion space 110, a holding portion 202 fixed in the upper body 12 or the lower body 13, and extending backward and protruding from the holding portion 202. Out of the tail portion 203 of the insulating body 1 , the contact arms 201 are arranged in two rows opposite to each other on the upper side and the lower side of the plugging space 110 . In this embodiment, the contact arm 201 protrudes upward or downward into the insertion space 110, and has a contact portion 2011 at its free end, and the contact portion 2011 protrudes toward the corresponding contact arm 201 in another row. stretch.

When the upper and lower bodies 12, 13 are not loaded into the base 11, the holding portion 202 of the conductive terminal 2 is exposed to the In the outside air; when the upper and lower bodies 12 , 13 are loaded into the base 11 , the perforations 1202 , 1302 are blocked by the top wall 112 or bottom wall 113 of the base 11 .

Please refer to FIG. 7 and FIG. 10 , the conductive terminals in the first and second terminal groups 21 and 22 all include the first-type terminal with the holding portion 202 having a first width in the lateral direction and the holding portion 202 in the lateral direction. A second type of terminal having a second width in a direction, wherein the first width is larger than the second width; preferably, the first width is 1.2 to 1.4 times the second width.

In this embodiment, the width of the holding portion 202 of each conductive terminal 2 in the lateral direction is always consistent from the back to the front, and the width extends to the contact arm 201 without change, so that the contact arm The width of other parts except the front section is the same as that of the holding portion 202; Compared with the width of the corresponding part of the second-type terminal, it only needs to meet the above conditions, so that not only a large current can be transmitted, but also good high-frequency characteristics can be ensured.

At the same time, the first and second terminal groups 21, 22 each include a pair of ground terminals 20a located on the outermost side and a pair of power terminals 20b located inside the ground terminals 20a, wherein the ground terminals are the first type of terminals, so The power supply terminal 20b is a first type terminal.

Both the first and second terminal groups 21 and 22 also include a plurality of signal terminals located inside the pair of power terminals 20b, and the signal terminals are second-type terminals.

The first and second terminal groups 21, 22 also have high-speed signal terminals 20c located between the ground terminal 20a and the adjacent power supply terminal 20b, the high-speed signal terminals 20c are arranged in pairs, and each A pair of high-speed signal terminals 20c are arranged between the ground terminal 20a and its adjacent power supply terminal 20b, and the high-speed signal terminals 20c are the second type terminals.

Specifically, in this embodiment, the first terminal group 21 and the second terminal group 22 each have twelve conductive terminals, which are respectively: the first ground terminal (Gnd) 20a, the first pair of high-speed signal Terminal (TX1+-, differential signal terminal, used to transmit high-speed signals) 20c, the first power supply terminal (Power/VBUS) 20b, a function detection terminal (CC1, used to detect the function of positive and negative insertion and identify CABLE function), a pair of low-speed signal terminals (D+-, differential signal terminals, used to transmit low-speed signals), an expansion terminal (SBU1, which can be added and defined for other purposes), the second power supply terminal (Power/VBUS) , the second pair of high-speed signal terminals (RX2+-, differential signal terminals, used to transmit high-speed signals) and the second ground terminal (Gnd), and the signal terminals between the two power supply terminals 20b (function detection terminals, low-speed Signal terminals and expansion terminals) can be set according to application needs.

The locking member 3 is made of metal. In this embodiment, the locking member 3 has a pair of locking arms 31 located on both sides of the conductive terminal 2 in the lateral direction and extending along the lateral direction and The cross beam 32 connected to the pair of locking arms 31, further, the locking member 3 also has a pair of protrusions 33 extending forward from the front end of the cross beam 31, and the pair of protrusions 33 extend along the transverse direction The directions are arranged at intervals and protrude forward into the slots formed in the upper and lower bodies 12 and 13 . The locking member 3 is sandwiched between the upper terminal assembly and the lower terminal assembly in the height direction, and the pair of locking arms 31 on both sides thereof are accommodated in the corresponding slots 1171 .

After the upper terminal assembly and the lower terminal assembly are assembled and inserted into the base 11, the locking member 3 is inserted into the base 11 from the rear to the front. At this time, in the lateral direction, the The upper and lower bodies 12 , 13 are clamped between the pair of locking arms 31 .

The pair of slots 123 of the upper body 12 communicate with the corresponding slots 133 of the lower body 13 to jointly accommodate the corresponding protrusions 33, and the positioning structures of the upper and lower bodies 12, 13 are along the transverse direction It is located between the pair of protrusions 33 . Specifically, in the present invention, the width of each protrusion 33 in the transverse direction is between 0.7 mm and 1.27 mm, so that the electrical connector 100 has good high-frequency performance. The length of each protrusion 33 along the front-rear direction is less than 1.5 times the width along the transverse direction.

In addition, in the lateral direction, the orthographic projection of a pair of adjacent high-speed signal terminals 20c in the first and second terminal groups 21, 22 on the horizontal plane falls into the corresponding convex portion 33 on the horizontal plane. The interior of the orthographic projection, that is, the sum of the widths of the adjacent pair of high-speed signal terminals 20c in each row of conductive terminals 2 and the gap between the two is not greater than the width of each of the protrusions 33; preferably, the The width of the protrusion 33 is greater than the sum of the width of the pair of high-speed signal terminals 20c and the gap between them, so that the height direction between the first and second terminal groups 21, 22 The convex portion 33 can effectively shield the high-frequency interference between the high-speed signal terminals, thereby improving the high-frequency performance of the electrical connector 100 .

Each locking arm 31 has a locking protrusion 311 and a protruding portion 312 protruding toward the other locking arm 31 , and the protruding portion 312 is located between the locking protrusion 311 and the cross beam in the front-rear direction. 32, and abut against the base 11 inwardly.

The beam 32 is sandwiched between the extension sections 122, 132 of the upper and lower bodies 12, 13 to be positioned in the receiving space 120, and the connection section 121, 131 and the extension section 122, 132 A stop surface 1310 is formed between them to resist the cross beam 32 at the front side.

The extensions 122, 132 of the upper and lower bodies 12, 13 have receiving portions 1221, 1321 at their rear ends, and the thickness of the receiving portions 1221, 1321 in the height direction is smaller than that of the extensions 122, 132 on the front side. Thickness in height direction.

The locking member 3 also has a welding leg 34 extending backward from the beam 32 beyond the rear surface of the insulating body 1 for soldering to a circuit board (not shown), so that the locking member 3 also has a grounding effect . In other embodiments of the present invention, according to the requirements of the application environment, the electrical connector 100 may not have the locking member.

The front end of the shielding shell 4 has an oval docking frame opening, which is consistent with the docking frame opening of a standard USB Type-C plug connector, and is used for front and back insertion of the docking socket connector. Ease of use benefits apply to both.

In the present invention, each of the metal elastic pieces 5 has a substrate 51 attached to the outside of the insulating body 1, an inner resisting elastic piece 53 that is folded forward from the rear end of the substrate 51 and extends backward. Extending to abut against the outer abutting elastic piece 54 of the shielding shell 4, the inner abutting elastic piece 53 arches toward the inside of the insertion space 110, the rear end of the outer abutting elastic piece 54 is a free end, and thereafter The ends have a tendency to move closer to the shielding shell 4 .

The above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced. Without departing from the spirit and scope of the technical solution of the present invention.

Claims (10)

1. An electrical connector, which has an insulating body, a number of conductive terminals fixed in the insulating body and a shielding shell covered outside the insulating body, and the conductive terminals are arranged in two rows along the height direction The first terminal group and the second terminal group, the insulating body includes a base, an upper body and a lower body assembled to the base, and the first terminal group and the second terminal group are respectively embedded and fixed on the upper body and the lower body to form an upper terminal assembly and a lower terminal assembly, characterized in that: the upper terminal assembly and the lower terminal assembly are inserted into the base after being assembled in the height direction, and the base has opposite A top wall and a bottom wall are provided, and the top and bottom walls extend backward beyond the rear end surfaces of the upper and lower bodies. 2. The electrical connector according to claim 1, characterized in that: the electrical connector also has a locking member assembled on the insulating body, when the upper and lower terminal assemblies are assembled along the height direction, they are inserted into the After being inside the base, the locking member is inserted into the base from back to front. 3. The electrical connector according to claim 2, wherein the base has an installation space recessed from the rear to the front and a pair of slots arranged on both sides of the base in the transverse direction , the pair of slots open laterally and outwardly respectively and communicate with the installation space, and the locking piece is sandwiched between the upper terminal assembly and the lower terminal assembly and makes the pair of locking arms on both sides housed in the corresponding slot. 4. The electrical connector according to claim 1, wherein the upper body and the lower body are respectively provided with at least one positioning portion on the sides facing away from each other in the height direction, and the top wall and the bottom wall are respectively provided with There is at least one positioning hole, and the positioning part cooperates with the corresponding positioning hole to fix the upper and lower bodies in the base. 5 . The electrical connector as claimed in claim 4 , wherein the top and bottom walls respectively have guiding surfaces at least partially protruding from the rear side of the rear end surface. 5 . 6. The electrical connector according to claim 5, wherein each said guide surface extends obliquely to the rear surface of said top/bottom wall along a direction angled to the horizontal direction, and a pair of guide surfaces The faces are oppositely arranged to form a trumpet-shaped guide cavity with an enlarged rear opening. 7. The electrical connector according to claim 3, wherein the upper and lower bodies each have a joint section located at the front side and an extension section located at the rear side, and the joint sections of the upper and lower bodies are along the height The extension sections of the upper and lower bodies are arranged at intervals along the height direction to form an accommodating space between them. 8. The electrical connector according to claim 7, wherein the locking member comprises a beam, the pair of locking arms extending forward from the beam, and extending backward from the beam beyond the insulation The rear surface of the main body is used for soldering on the circuit board, and the beam is sandwiched between the extensions of the upper and lower main bodies so as to be positioned in the receiving space. 9. The electrical connector according to claim 8, characterized in that: in the lateral direction, the upper and lower bodies are sandwiched between the pair of locking arms, and the joint section is in the lateral direction The two sides protrude outward respectively to form a boss, and the boss protrudes into the slot. 10. The electrical connector as claimed in claim 9, wherein each of the locking arms has a locking protrusion and a protrusion protruding toward the other locking arm, and in the front-rear direction, the protrusion The part is located between the locking protrusion and the beam, and abuts against the base inwardly.