CN107240801B - Electrical connector with improved contact arrangement - Google Patents

Abstract

An electric connector comprises an insulating body, an upper row terminal group and a lower row terminal group which are fixed in the insulating body and composed of a plurality of terminals, a shielding piece fixed in the insulating body and a metal shell fixed outside the insulating body, wherein the insulating body and the metal shell jointly enclose a butt joint space for inserting a butt joint connector with one open end, the insulating body comprises a base part and a tongue plate formed by forward extension of the front end surface of the base part, the metal shell is sleeved outside the insulating body and comprises a front shell and a rear shell which are both in a cuboid tubular shape, and the width of the front shell in the transverse direction is smaller than that of the rear shell in the transverse direction and/or the height of the front shell in the height direction is smaller than that of the rear shell in the height direction. Through the two-section structure of the metal shell, the surrounding waterproof glue can be formed outside the metal shell when glue filling treatment is carried out, so that the integral waterproof effect of the electric connector is realized.

Description

Electrical connector with improved contact arrangement

Technical Field

The present invention relates to an electrical connector, and more particularly to an electrical connector formed by multiple injection molding.

Background

In the past, universal Serial Bus (USB) was used by the general public, and developed from USB2.0 transmission specification to USB3.0 transmission specification with faster transmission speed.

However, the shape, structure, contact manner of terminals, number of terminals, distance (Pitch) between terminals, and Pin Assignment (Pin Assignment) of the latest generation of USB Type-C electrical connector are different from those of the current USB electrical connector. The USB Type-C socket electric connector comprises an upper row of flat plate terminals and a lower row of flat plate terminals which are arranged on a rubber core, and the outer part of the rubber core is covered with structures such as an outer iron shell. The rubber core of the general USB Type-C socket electric connector is formed by assembling, combining and injection molding a plurality of rubber bodies, and each rubber body is respectively combined with a row of upper-row flat terminals and a row of lower-row flat terminals.

However, in the age of electronic products with their functions being changed day by day, the waterproof function is inevitably a trend of development of electronic products. The existing USB Type-C socket electric connector is usually completed by a process of combining multiple times of injection molding and assembling due to the characteristics of large number of terminals, small distance between each terminal, mirror symmetry between an upper row of terminals and a lower row of terminals and the like. However, multiple molding and multiple assembling will inevitably generate more joint seams between the modules, so the waterproof design difficulty for the USB Type-C is not equal to that of the traditional connector. Waterproof design consideration to USBType-C is actually more complicated, and is more difficult. Especially in the rear position of the USB Type-C socket electric connector. Therefore, how to design a USB Type-C product with excellent waterproof performance and stable structure is a problem that the relevant industry must think now.

In view of the above, it is necessary to improve the structure of the conventional electrical connector to solve the above problems.

Disclosure of Invention

The invention aims to provide an electric connector which has waterproof performance, stable integral structure, good integral strength and simple manufacture procedure.

In order to achieve the above object, the present invention provides an electrical connector, including an insulating body, an upper row terminal set and a lower row terminal set composed of a plurality of terminals and fixed in the insulating body, a shielding member fixed in the insulating body, and a metal shell fixed outside the insulating body, wherein the insulating body and the metal shell together enclose a docking space for inserting a docking connector with an opening at one end, the insulating body includes a base portion and a tongue plate formed by extending a front end surface of the base portion forward, the metal shell is sleeved outside the insulating body and includes a front shell and a rear shell both in a shape of a rectangular parallelepiped tube, a width of the front shell in a transverse direction is smaller than a width of the rear shell in the transverse direction and/or a height of the front shell in a height direction is smaller than a height of the rear shell in the height direction, the front shell and the rear shell are spaced apart in the front-rear direction to form a gap, a coupling portion is connected between the front shell and the rear shell to form an integral body, the electrical connector further includes an insulating shell arranged outside the metal shell, a waterproof section difference is formed on at least one side of the front shell and the rear shell in the transverse direction, and a peripheral glue groove is formed between the front shell and the rear shell, and the front shell and the waterproof glue groove is formed on one side of the insulating shell.

As a further improvement of the present invention, the step difference formed between the rear case and the front case is larger than the thickness of the rear case.

As a further improvement of the present invention, the front section of the base portion has a width in the lateral direction smaller than that of the rear section thereof, so that an abutment surface provided frontward is formed on the front surface of the rear section thereof, and the rear end surface of the front housing abuts against the abutment surface, so that the front section of the rear section of the base portion is caulked into the notch.

As a further improvement of the present invention, the top wall of the front housing is flush with the top wall of the rear housing, and the engaging portion connects the top wall of the front housing with the top wall of the rear housing to form a flat top wall.

As a further improvement of the present invention, the insulating body further has an extending portion extending rearward from the rear end of the base portion, the rear housing has an annular body portion sleeved on the base portion, and the front housing surrounds the periphery of the tongue plate.

As a further improvement of the present invention, a rear end surface of the body portion abuts against a front end surface of the extension portion.

As a further improvement of the present invention, the top wall of the metal shell is slightly lower than the upper surface of the extension.

As a further improvement of the present invention, the rear housing further has buckling portions respectively bent and extended backward and inward from rear end edges of the two side walls of the main body, the buckling portions on the two side walls protrude in opposite directions, and two sides of the extending portion are respectively recessed inward to form a limiting groove for the corresponding buckling portion to be inserted into, so as to perform surrounding positioning on the rear side of the insulating body.

The beneficial effects of the invention are: through the two-section structure of the metal shell, the surrounding waterproof glue can be formed outside the metal shell when glue filling treatment is carried out, so that the integral waterproof effect of the electric connector is realized.

Drawings

Fig. 1 is a perspective view of the electrical connector of the present invention mounted on a circuit board.

Fig. 2 is a perspective assembly view of the electrical connector of the present invention.

Fig. 3 is an exploded perspective view of the electrical connector shown in fig. 2.

Fig. 4 is an exploded perspective view of a first terminal module and a second terminal module of the electrical connector shown in fig. 3.

Fig. 5 is a perspective assembly view of the first terminal module and the second terminal module of the electrical connector shown in fig. 4.

Fig. 6 is a perspective view of the upper row terminal set, the lower row terminal set and the shielding member in the first terminal module and the second terminal module shown in fig. 5.

Fig. 7 is a perspective view of the first terminal module and the second terminal module of the electrical connector shown in fig. 5 after the inner insulating member is molded.

Fig. 8 is a perspective view of the electrically connected insulating body of fig. 3 after the metal housing is assembled outside.

Fig. 9 is a view of the electrical connector of fig. 8 from another perspective.

Fig. 10 is a partial assembly view of the electrical connector shown in fig. 3.

Fig. 11 is a view of the electrical connector of fig. 2 from another perspective.

Fig. 12 is a rear view of the electrical connector of fig. 2.

Fig. 13 is a schematic cross-sectional view of the electrical connector of fig. 2 with the seal ring removed.

Fig. 14 is a cross-sectional view of the electrical connector shown in fig. 2 with the first and second terminal modules and the sealing ring removed.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present invention clearer, the following detailed description of the present invention is made with reference to the accompanying drawings and specific embodiments, and for convenience and accuracy of description, all directions involved herein refer to fig. 1, in which the end of the mating connector (mating plug, not shown) is a front end and the other end is a rear end.

Referring to fig. 1 to 14, the electrical connector 100 of the present invention can be installed on a circuit board 200 in a sink-type manner and can be mated with a mating connector. The electrical connector 100 includes an insulating body 10, an upper row terminal set 21 and a lower row terminal set 22 embedded in the insulating body 10, a shielding member 30 embedded in the insulating body 10, a metal shell 40 fixed outside the insulating body 10, an insulating shell 50 sleeved outside the metal shell 40, a fixing member 60 fixed on the insulating shell 50, and a sealing ring 70 fixed on the periphery of the front end of the insulating shell 50. The insulation body 10, the metal shell 40 and the insulation casing 50 together enclose a docking space 1000 forming a front end opening for inserting a docking connector.

Referring to fig. 4 to 7, the insulation body 10 includes an upper insulation body 11 injection-molded on the upper row terminal set 21, a lower insulation body 12 injection-molded on the lower row terminal set 22 and the shielding member 30, and an inner insulation member 13. The upper terminal group 21 and the upper insulator 11 form an upper terminal module 110, and the lower terminal group 22, the shield 30 and the lower insulator 12 together form a lower terminal module 120. After the upper terminal module 110 and the lower terminal module 120 are assembled, the inner insulator 13 is overmolded on the upper terminal module 110 and the lower terminal module 120 (as shown in fig. 5 and 7).

The inner insulator 13 of the insulating housing 10 includes a base 131 and a tongue plate 132 formed by extending a front end of the base 131 forward. The front section of the base 131 has a smaller width in the lateral direction than the rear section thereof, and thus, U-shaped abutment surfaces 1311 disposed forward are formed on both sides and the bottom of the front surface of the rear section thereof. The tongue plate 132 includes a base tongue plate 1321 near the front end of the base 131 and an end tongue plate 1322 connected to the base tongue plate 1321. The front sections of the terminals in the upper and lower terminal groups 21 and 22 are respectively exposed on the upper and lower sides of the end tongue plate 1322.

The inner insulator 13 further has an extension 133 extending rearward from the rear end of the base 131, and the bottom surface of the extension 133 is higher than the bottom surface of the base 131, so that a stepped structure is formed at the intersection of the extension 133 and the base 131, that is, the rear end surface 1310 of the base 131 is exposed below the extension 133. In the height direction, the upper surface 1330 of the extension 133 is located above the top surface of the base 131.

The extension 133 is formed with a pair of protrusions 1331 protruding upwards from the upper surface 1330, and the protrusions 1331 are spaced apart from each other in the transverse direction and located at two ends of the extension 133 in the transverse direction. A certain distance is left between the protruding portion 1331 and the front end surface of the extending portion 133 to form a guide passage 1332 in front of the protruding portion 1331, and the guide passage 1332 extends in the transverse direction and communicates with a channel 1333 formed at an interval between the pair of protruding portions 1331. The bottom surface of the extending portion 133 is recessed upward to form a pair of limiting grooves 1334, and the limiting grooves 1334 are disposed at two sides of the bottom of the extending portion 133 and are both opened downward and outward.

Referring to fig. 3 to 5, in the present embodiment, the upper insulator 11 is a one-piece structure, and the upper row terminal set 21 is embedded therein to form the upper row terminal module 110. The upper insulator 11 includes a front section 111 and a rear section 112, the front section 111 is at least partially located at the position of the tongue end plate 1322, and the rear section 112 is at least partially located at the position of the base tongue plate 1321. The front section 111 and the rear section 112 support and fix the upper row terminal group 21 from front to rear. The rear section 112 protrudes downwards to form a positioning block 1121, and in this embodiment, the positioning block 1121 is rectangular.

The lower insulator 12 is also formed in a unitary (i.e., one-piece) shape, and the lower insulator 12 is embedded with the lower terminal group 22 and the shield 30. The lower insulator 12 has a main body 121 and a plurality of barriers 122 extending upward from the rear end of the main body 121, the main body 121 is provided with a positioning groove 1211 penetrating through the main body in the height direction, and when the upper row terminal module 110 and the lower row terminal module 120 are assembled vertically, the positioning block 1121 provided at the bottom of the upper insulator 11 is inserted downward and fixed into the positioning groove 1211 to fix the upper and lower insulators 11 and 12 together.

The plurality of barriers 122 are arranged side by side along the transverse direction, and a spacing groove 123 is formed between every two adjacent barriers 122 at intervals, that is, the barriers 122 and the spacing grooves 123 are alternately arranged, so that after the upper row terminal module 110 and the lower row terminal module 120 are assembled up and down, the combination degree of the inner insulator 103, the upper row terminal module 110 and the lower row terminal module 120 when the inner insulator 103 is formed by injection molding can be ensured, and meanwhile, the fluidity of hot melt for forming the inner insulator 103 can be improved.

Referring to fig. 3 to 6, in the present embodiment, the upper row terminal set 21 has eight terminals in total, and the arrangement of the eight terminals is consistent with the arrangement of the corresponding terminals on the standard USB Type-C socket connector, specifically, the upper row terminal set 21 includes an upper row signal terminal 211, at least one upper row power terminal 212, and at least one upper row ground terminal 213, in the present embodiment, the upper row signal terminal 211 is a pair of upper row low speed signal terminals. From the front view of the electrical connector 100, the left-side to the right-side terminals are sequentially arranged as a first upper row ground terminal 213 (Gnd), a first upper row Power terminal 212 (Power/VBUS), an upper row function detection terminal 214 (CC 1, for detecting the function of forward/reverse insertion and recognizing the function of CABLE), a pair of upper row low-speed signal terminals 211 (D + -, differential signal terminals for transmitting low-speed signals), an upper row expansion terminal 215 (SBU 1, which can be defined as other purposes), a second upper row Power terminal 212 (Power/VBUS), and a second upper row ground terminal 213 (Gnd). The head of the upper ground terminal 213 extends forward beyond the head of the upper power terminal 212, and the head of the upper power terminal 212 extends forward beyond the heads of the upper function detection terminal 214, the upper low-speed signal terminal 211 and the upper expansion terminal 215.

In this embodiment, the number of terminals of the lower row terminal set 22 is the same as that of the upper row terminal set 21, the lower row terminal set 22 also includes a lower row signal terminal 221, at least a lower row power terminal 222 and at least a lower row ground terminal 223, and the lower row signal terminal 221 is a pair of lower row low speed signal terminals. The lower row of terminals from right to left is arranged in the order of a first lower row of ground terminals 223, a first lower row of power terminals 222, a lower row of function detection terminals 224, a pair of lower row of low speed signal terminals 221, a lower row of expansion terminals 225, a second lower row of power terminals 222 and a second lower row of ground terminals 223 from the front view of the electrical connector 100. From the front view of the electrical connector 100, the lower row terminal set 22 and the upper row terminal set 22 are arranged oppositely and arranged oppositely, that is, the lower row terminal set 22 and the upper row terminal set 22 are point-symmetric, so as to realize the function of forward and backward insertion.

Referring to fig. 3 to 7, each terminal of the upper row terminal set 21 and each terminal of the lower row terminal set 22 have substantially the same basic configuration, wherein each terminal includes a contact section 201 exposed out of the surface of the end tongue 1322 of the insulating body 10, a tail section 203 extending rearward beyond the insulating body 10, and a connecting section 202 connecting the contact section 201 and the tail section 203 and at least partially embedded in the base 131 and the base tongue 1321 of the insulating body 10. The contact section 201 is configured to mate with a mating connector, and the tail section 203 is mechanically and electrically connected to the circuit board 200.

The connecting section 202 comprises a first connecting section 2021 extending from the rear end of the contact section 201 to the rear, and a second connecting section 2022 extending from the rear end of the first connecting section 2021 to the upper and rear directions, wherein the first connecting section 2021 extends from the rear end of the contact section 201 to the rear horizontally, and the upper and lower surfaces of the first connecting section 2021 are respectively flush with the upper and lower surfaces of the contact section 201; meanwhile, in the present embodiment, except that the longitudinal axis of the first connecting section 2021 of the two terminals in the middle of the lower row of terminal set 22 is aligned with the longitudinal axis of the corresponding contact section 201 in the front-rear direction (i.e., parallel to the longitudinal axis of the electrical connector 100), the first connecting sections 2021 of the other terminals extend from the rear ends of the contact sections 201 in the direction away from the longitudinal axis of the electrical connector 100, so that the lateral distance between the adjacent second connecting sections 2022 of the other terminals is increased, and since the tail portions 203 are formed by extending rearwards from the rear ends of the second connecting sections 2022, the lateral distance between the adjacent tail portions 203 of the other terminals can be increased, i.e., the lateral distance between the adjacent tail portions 203 of the other terminals is greater than the lateral distance between the two terminals in the middle of the lower row of terminal set 22.

The tail portion 203 includes a reinforcing portion 2031 embedded in the extending portion 133 and a soldering portion 2032 extending backward from the reinforcing portion 2031 to be connected to the circuit board 200, the reinforcing portion 2031 is L-shaped, and one end thereof is connected to the second connection section 2022 and the other end thereof is connected to the soldering portion 2032. In addition, after the upper row terminal module 110 and the lower row terminal module 120 are assembled vertically, the second connecting sections 2022 of the terminals in the upper row terminal group 21 respectively fall into the corresponding partition grooves 123, and besides the two terminals at the center of the lower row terminal group 22, the tail portions 203 of the upper row terminal group 21 and the tail portions 203 of the other terminals in the lower row terminal group 22 are alternately arranged (as shown in fig. 6), and the soldering portions 2032 of the terminals in the upper row terminal group 21 and the soldering portions 2032 of the terminals in the lower row terminal group 22 are at the same height and are arranged in a row along the transverse direction.

The connecting section 202 of each terminal in the lower row terminal group 22 is embedded in the lower insulator 12, wherein the lower sections of the first connecting section 2021 and the second connecting section 2022 are embedded in the rear portion of the main body 121, the upper section of the second connecting section 2022 and the front section of the reinforcing portion 2031 are embedded in the corresponding partition 122, and meanwhile, each reinforcing portion 2031 in the two rows terminal groups 21 and 22 is embedded in the extending portion 133, so as to shorten the suspended length of each tail portion 203 in the two rows terminal group 22, enhance the strength of the connecting section 202 of the lower row terminal group 22 and the joint between the connecting section 202 and the tail portion 203, prevent the tail portion 203 and the corresponding material tape from deforming when being disconnected, and ensure the flatness of the welding portion 2032.

The terminals in the upper row terminal group 21 are different from the terminals in the lower row terminal group 22 in that the extension length of the connecting sections 202 of the terminals in the upper row terminal group 21 is shorter than that of the connecting sections 202 of the terminals in the lower row terminal group 22, so that the corresponding portions of the tail portions 203 of the upper row terminal group 21 are flush with the corresponding portions of the tail portions 203 of the lower row terminal group 22, respectively.

Referring to fig. 3 to 9, the shielding members 30 include a pair of shielding members 30 disposed opposite to each other along the transverse direction, each shielding member 30 includes a flat plate portion 31 disposed horizontally, a soldering foot 32 extending backward from the insulating body 10 to be fixed to the circuit board 200, and a connecting portion 33 connecting the flat plate portion 31 and the soldering foot 32, and the soldering foot 32 is located on two sides of the tail portion 203 of the two rows of terminal sets 21 and 22 along the transverse direction. The shielding element 30 is embedded in the insulating body 10 and the flat plate portion 31 thereof is located between the upper row terminal set 21 and the lower row terminal set 22 along the height direction to achieve the shielding and grounding function. The connecting portion 33 is at least partially embedded in the outermost rail 122.

Referring to fig. 3, 8 to 10 and 13, the metal shell 40 is disposed outside the insulating body 10 and includes a front shell 41 and a rear shell 42, the front shell 41 and the rear shell 42 are substantially rectangular tubes and spaced apart from each other in a front-rear direction to form a gap 43, and the front shell 41 and the rear shell 42 are connected by a connecting portion 44 to form a whole. In this embodiment, the top wall of the front housing 41 is flush with the top wall of the rear housing 42, and the engaging portion 44 connects the top wall of the front housing 41 and the top wall of the rear housing 42 to form a flat top wall. In the present embodiment, the width of the front case 41 in the lateral direction and the height in the height direction are both smaller than the corresponding width and height of the rear case 42; in other embodiments, it is also possible to make only the width of the front case 41 in the lateral direction smaller than the width of the rear case 42 in the lateral direction or the height of the front case 41 in the height direction smaller than the height of the rear case 42 in the height direction. Specifically, the longitudinal axis of the front case 41 coincides with the longitudinal axis of the rear case 42, and the width of the front case 41 in the lateral direction is smaller than the width of the rear case 42 and/or the height of the front case 41 in the height direction is smaller than the height of the rear case 42 in the height direction, so that a step difference is formed on at least one side of the front case 41 in the lateral direction and/or a step difference is formed on one side of the front case 41 and the rear case 42 in the height direction, and a glue accommodating groove 45 into which waterproof glue enters and surrounds is formed between the outer periphery of the front case 41 at the step difference position (both sides and/or the bottom in the lateral direction) and the inner surface of the insulating housing 50, and the step difference is larger than the thickness of the rear case 42 (as shown in fig. 13).

The rear housing 42 has a ring-shaped main body 421, a latching portion 422 bent and extended backward and inward from the rear end edges of the two side walls of the main body 421, and at least one abutting portion 423 bent and extended upward from the rear end edge of the bottom wall of the main body 421, wherein the latching portions 422 on the two side walls protrude in opposite directions and are inserted into the corresponding limiting grooves 1334 to surround and position the rear side of the insulating body 10. In this embodiment, the number of the abutting portions 423 is one pair, and in other embodiments, one or more abutting portions 423 may be provided. The rear housing 42 and the rear end of the front housing 41 are assembled outside the base 131 of the insulating body 10, and the abutting portion 423 abuts forward against the rear end surface 1310 of the base 131 to further position the insulating body 10 below.

The main body 421 of the rear housing 42 is sleeved outside the rear end of the base 131, the rear end surface of the main body 421 abuts against the front end surface 1335 of the extension 133, the front housing 41 surrounds the periphery of the tongue plate 1321, the rear portion of the front housing 41 is sleeved outside the front section of the base 131, and the rear end surface of the front housing 41 abuts against the abutting surface 1311 of the base 131, so that the front portion of the rear section of the base 131 is filled into the notch 43, and waterproof glue is prevented from entering the abutting space 1000. In the present invention, the tongue plate 132 protrudes forward out of the metal shell 40, in other words, the length of the metal shell 40 in the mating space 1000 is smaller than the insertion depth of the mating connector.

Referring to fig. 3, 10 to 12 and 14, in the present invention, the insulating housing 50 is substantially in the shape of a rectangular parallelepiped, and a receiving space 500 is formed therebetween. The insulating housing 50 includes an upper plate 51 and a lower plate 52 which are disposed opposite to each other, and two side plates 53 which connect both side edges of the upper plate 51 and the lower plate 52, respectively. The inner wall surface of the insulating housing 50 is formed with a stepped portion 54 and a stopper surface 541, and the front end portion of each of the upper plate portion 51, the lower plate portion 52, and the side plate portion 53 of the insulating housing 50 is thicker than the rear end portion in the front-rear direction. The stop surface 541 is correspondingly abutted against the front end edge of the metal shell 40, so that the assembly limit of the insulating shell 50 and the metal shell 40 is realized.

In the invention, the insulating housing 50 is designed to be short and small, and is assembled and positioned by matching with the step part 54 structure of the insulating housing 50, and the insulating housing 50 with a thicker plate surface is reserved on the front side of the metal shell 40 to form the mounting groove 55 for matching with the sealing ring 70, so that the whole width and thickness of the whole electric connector 100 are ensured to be smaller, the structure matching design is reasonable, exquisite and stable, and the manufacturing process is simple.

The insulating shell 50 is sleeved on the outer side of the metal shell 40 to play a waterproof role, wherein, in the plugging direction, the front end edge of the insulating shell 50 is basically flush with the front end edge of the tongue plate 132, the front end edge of the insulating shell 50 protrudes to the front end of the front end edge of the metal shell 40, the front end edge of each terminal protrudes to the front end of the front end edge of the metal shell 40, and the front end edge of each terminal is located between the front end edge of the insulating shell 50 and the front end edge of the metal shell 40. The metal shell 40 is designed to be short and small to facilitate the fitting and holding with the insulating housing 50 and to ensure the bonding strength, and to ensure the overall width and thickness of the electrical connector 100 to be small.

The outer diameter of the front periphery of the insulating housing 50 is smaller than that of the rear portion, so that the mounting groove 55 is formed on the front periphery thereof, and the mounting groove 55 is substantially U-shaped and located in front of the stop surface 541 of the step portion 54 (i.e. located at a position where the plastic thickness of the front end of the insulating housing 50 is thicker). The sealing ring 70 is fixed in the mounting groove 55 at the periphery of the front end of the insulating housing 50 to play a waterproof role.

Referring to fig. 3, 10 to 12 and 14, the fixing element 60 is formed in the insulating housing 50, is made of a metal plate by stamping and bending, and is fixed with the circuit board 200 to implement a grounding shielding function. The fixing element 60 includes a fixing plate 61 and two welding feet 62 respectively bent and extended downward from two sides of the fixing plate 61 in the transverse direction, the rear side of the fixing plate 61 is arched upward to form a convex portion 611, the front side of the convex portion 611 is closely adjacent to a slit 612, and the extending direction of the convex portion 611 is the same as the extending direction of the slit 612. The front of the fixing plate 61 protrudes downward to form a contact portion 613, and the contact portion 613 abuts against the top wall of the metal housing 40 to achieve conduction. In the present embodiment, the contact portion 613 is a convex structure formed by pressing downward from the front portion of the fixing plate 61, such as a rectangular bump structure (as shown in fig. 2 and 14) or a plurality of ribs or protruding strips, or a downwardly protruding elastic strip formed by tearing from the front portion of the fixing plate 61.

The front portion of the fixing plate 61 is embedded in the upper plate 51 of the insulating housing 50, and the contact portion 613 is exposed on the lower surface of the upper plate 51 so as to contact the top wall of the metal shell 40 inside the upper plate 51. The protruding portion 611 is exposed in the notch 511 provided at the rear end of the upper plate portion 51 and is flush with the rear end edge of the top wall of the upper plate portion 51 (as shown in fig. 14), the channel 1333 provided on the extending portion 133 of the insulating body 10 is covered by the protruding portion 611 and the rear end of the top wall of the upper plate portion 51, a flow passage 1336 is formed between the lower surface of the protruding portion 611 and the upper surface 1330 of the extending portion 133 at a distance in the height direction, and the flow passage 1336 is formed by overlapping the channel 1333 and the gap between the lower surface of the protruding portion 611 and the upper surface of the protruding portion 1331. The width of the slit 612 in the transverse direction is larger than that of the joint part 44, so as to enlarge the glue containing space above the joint part 44 of the metal shell 40. Since the protrusion 611 is upwardly arched, the distance between the lower surface of the protrusion and the upper surface 1330 of the extension 133 (i.e., the height of the flow passage 1336) is increased, thereby facilitating the filling of the waterproof adhesive.

Referring to fig. 11 to 14, the top wall of the metal housing 40 is slightly lower than the upper surface 1330 of the extension 133, the flow channel 1336, the flow guide channel 1332 and the gap 43 form a communicated glue filling space, and since an assembly gap exists between the inner wall surface of the metal housing 40 and the outer wall surface of the base 131, by performing glue filling treatment (filling waterproof glue) in the rear side flow channel 1336 of the electrical connector 100, the waterproof glue can surround and cover the periphery of the metal housing 40 and permeate into the assembly gap to achieve waterproof at the corresponding position, and enter the gap 43 to achieve thickening surrounding, so as to achieve better air tightness. Meanwhile, the waterproof glue poured into the flow channel 1336 can smoothly flow forward under the guidance of the flow channel 1332, so as to achieve the waterproof of the joints between the insulation body 10 at the rear part of the electrical connector 100 and the two rows of terminal groups 21 and 22 and the metal shell 40.

Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.

Claims (8)

1. An electric connector comprises an insulating body, an upper row terminal group and a lower row terminal group which are fixed in the insulating body and composed of a plurality of terminals, a shielding piece fixed in the insulating body and a metal shell fixed outside the insulating body, wherein the insulating body and the metal shell jointly enclose a butt joint space with one end opened for inserting a butt joint connector, the insulating body comprises a base part and a tongue plate formed by forward extending of the front end surface of the base part, and the electric connector is characterized in that: the metal casing cover is established the insulator outside, and it is including all being cuboid pipy procapsid and back casing, the procapsid is less than along the width of transverse direction the back casing along the width of transverse direction and/or the procapsid is less than along the ascending height of direction of height the back casing along the ascending height of direction of height, the procapsid separates in order to form a breach with the back casing along preceding rear direction, link to each other in order to constitute both wholly by an linking portion between procapsid and the back casing, electric connector still have set up in the insulating casing in the metal casing outside, the procapsid is formed with the section difference with at least one side of back casing on transverse direction and/or the procapsid is formed with the section difference with one of them side of back casing on the direction of height, and the periphery of procapsid in the section difference position department with form between the internal surface of insulating casing and supply the waterproof glue to get into and the glue containing groove that encircles.

2. The electrical connector of claim 1, wherein: the step formed between the rear case and the front case is greater than the thickness of the rear case.

3. The electrical connector of claim 2, wherein: the front section of the base part is smaller than the rear section of the base part in width along the transverse direction, so that a forward-arranged abutting surface is formed on the front surface of the rear section of the base part, and the rear end surface of the front shell abuts against the abutting surface, so that the front part of the rear section of the base part is stuffed in the gap.

4. The electrical connector of any one of claims 1 to 3, wherein: the roof of procapsid and the roof of back casing are parallel and level, linking portion links to each other the roof of procapsid with the roof of back casing in order to constitute a smooth roof.

5. The electrical connector of claim 1, wherein: the insulating body is also provided with an extension part formed by extending backwards from the rear end of the base part, the rear shell is provided with an annular body part sleeved on the base part, and the front shell surrounds the periphery of the tongue plate.

6. The electrical connector of claim 5, wherein: the rear end surface of the main body part abuts against the front end surface of the extension part.

7. The electrical connector of claim 6, wherein: the top wall of the metal shell is slightly lower than the upper surface of the extension part.

8. The electrical connector of claim 5, wherein: the rear shell is also provided with buckling parts which are bent and extended backwards and inwards from the rear end edges of the two side walls of the body part, the buckling parts on the two side walls are extended outwards, and the two sides of the extending parts are respectively sunken inwards to form limiting grooves for the corresponding buckling parts to be inserted into so as to surround and position the rear side of the insulating body.

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