TWM477691U - Electrical connector - Google Patents

Description

Electrical connector

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

With the continuous development of electronic products, the connection between various electronic products and their peripheral devices is more and more frequent, and the connection between electronic products and their peripheral devices through electrical connectors is a common way, so the electrical connection The frequency of use of the device also increases. Electrical connectors are so widely used in the electronics field, so manufacturers' production of electrical connectors has gradually changed from small-scale production to large-scale mass production to meet market demand.

However, the conventional electrical connectors are mostly inserted in one direction, which requires the user to first determine the direction and then insert in the process of plugging, which is extremely inconvenient for the user, so various manufacturers have adopted various The method improves the structure of the electrical connector to facilitate the user.

The purpose of this creation is to provide an electrical connector with the advantages and disadvantages of the prior art, which has a positive and negative insertion function and can improve crosstalk interference of high frequency signal transmission.

To achieve the above object, the present electrical connector includes an insulative housing, a plurality of conductive terminals, a metal piece, and a metal inner case. The insulative housing comprises a base portion and a tongue plate projecting forwardly from a central portion of the front surface of the base portion. The lower surface of the insulative body is recessed downwardly and upwardly and extends rearwardly through the base rear surface of the insulative housing to form a plurality of terminal slots, and the insulation is insulated. The main body can be divided into an upper body and a lower body. The opposite sides of the upper body and the lower body respectively form a groove, and the two grooves are closed to form a receiving space, and the plurality of conductive terminals are integrally formed in the terminal groove of the insulating body, and the metal The metal inner casing comprises a top wall, a bottom wall and two side walls, and the top wall, the bottom wall and the two side walls of the metal inner casing are respectively arranged in the receiving space of the upper body of the insulating body and the recess of the lower body. The insertion body is formed into a slot, and the insulative housing is received in the insertion slot of the metal inner casing, and the top end of the metal inner casing and the front end of the bottom wall are recessed backward with a pair of slots to expose the conductive terminals.

As described above, the upper body and the lower body of the present invention have a symmetrical structure in the horizontal direction, so that they have a positive and negative insertion function, and the metal piece is fixed between the upper body and the lower body to improve high frequency signal transmission. Crosstalk interference.

10‧‧‧Insulating body 11‧‧‧ Base 111‧‧‧Clamping groove 112‧‧‧Clamping block 113‧‧‧ Reception slot 12‧‧‧ tongue plate 121‧‧‧ Terminal slot 13‧‧‧ Upper body 14 ‧‧‧Lower body 15‧‧‧ Groove 151‧‧ ‧ recessed hole 152‧‧ ‧ post 16‧‧‧ fixing groove 17‧‧‧ slotted 18‧‧ ‧ engaging slot 19‧‧ ‧ hook groove 20 ‧‧‧Electrical terminal 30‧‧‧Metal sheet 31‧‧‧ Opening 32‧‧‧Boom arm 40‧‧‧Metal inner shell 41‧‧‧Top wall 42‧‧‧Bottom wall 43‧‧‧ Side wall 431‧‧ ‧Ping hole 432‧‧‧Cut hook 44‧‧‧Match slot 45‧‧‧ Missing slot 46‧‧‧Clamping piece 461‧‧‧Clamping port 462‧‧‧Clamping piece 50‧‧‧ Back cover 51‧‧‧Clamping groove 52‧‧‧Fixed hook 53‧‧‧Bump 60‧‧‧Metal casing 61‧‧‧Upper casing 611‧‧‧Upper wall 612‧‧‧Upper side wall 6121‧‧‧ bayonet 613‧‧‧First contact 6 ‧‧‧ Lower case 621‧‧‧ Lower wall 622‧‧‧ Lower side wall 6221‧‧ 卡 623‧‧‧Second contact part 63‧‧‧ Stop piece 70‧‧‧Insulated casing 80‧‧‧Printing Circuit board

The first figure is a perspective view of an embodiment of the present electrical connector.
The second figure is a perspective view of the electrical connector shown in the first figure with the insulating housing removed.
The third figure is an exploded perspective view of the metal casing of the electrical connector shown in the first figure.
The fourth figure is a perspective view of the internal structure of the electrical connector shown in the first figure.
The fifth figure is an exploded perspective view of the electrical connector shown in the fourth figure.
Figure 6 is a cross-sectional view of the electrical connector shown in Figure 2.
Figure 7 is a perspective view of the internal structure of another embodiment of the present electrical connector.
The eighth figure is an exploded perspective view of the electrical connector shown in the seventh figure.
The ninth drawing is a cross-sectional view of another embodiment of the present invention in which the insulating housing is removed.

To clarify the technical content, structural features, objectives, and effects of the present invention, the embodiments are described in detail below with reference to the drawings.

Please refer to the first to sixth figures, which are an electrical connector provided by the first preferred embodiment of the present invention, including an insulative housing 10, a plurality of conductive terminals 20, a metal piece 30, and a metal inner casing. 40. A rear cover 50, a set of metal outer casings 60 and an insulative outer casing 70.

Referring to FIG. 5, the insulating body 10 is vertically symmetric with a horizontal plane as a plane of symmetry, and includes a base portion 11 and a tongue plate 12 projecting forward from a central portion of the front surface of the base portion 11. Upper and lower surfaces of the base portion 11 of the insulating body 10 A pair of latching slots 111 are recessed downwardly and upwardly, and a pair of latching blocks 112 are respectively protruded upwardly and downwardly in the middle of the latching slots 111. The rear ends of the upper and lower surfaces of the base 11 are respectively downwardly and upwardly recessed. The receiving groove 113 is provided. The upper and lower surfaces of the tongue plate 12 of the insulative housing 10 are respectively recessed downward and upward and extend rearwardly through the rear surface of the base portion 11 of the insulative housing 10 to form a plurality of terminal slots 121.

Further, the insulative housing 10 can be divided into an upper body 13 and a lower body 14 along the plane of symmetry, and the upper body 13 and the lower body 14 have a symmetrical structure. A recess 15 is formed on the opposite side of the upper body 13 and the lower body 14, and the two recesses 15 are closed to form a receiving space (not shown). The upper body 13 and the lower body 14 are provided with at least a pair of concave holes 151 and protrusions 152 on the bottom wall of the groove 15 and cooperate with each other. The upper body 13 and the lower body 14 are respectively recessed inwardly on both sides of the rear end of the base portion 11 and form a pair of fixing grooves 16 through the upper body 13 and the lower body 14 downwardly and upwardly, and the front end of the fixing groove 16 has a recessed depth greater than the rear end. The upper body 13 and the lower body 14 are respectively provided with a pair of slots 17 in the groove wall of the groove 15 of the tongue plate 12 at the rear end. The upper body 13 and the lower body 14 are respectively recessed inwardly on both sides of the front end of the tongue plate 12, and a pair of engaging grooves 18 are formed through the upper body 13 and the lower body 14 , and are respectively recessed inwardly on both sides of the front end of the engaging groove 18 . A pair of hook grooves 19 are formed through the upper and upper surfaces of the upper body 13 and the lower body 14 downward and upward.

The plurality of conductive terminals 20 are integrally formed in the terminal groove 121 of the insulative housing 10.

The metal piece 30 is correspondingly disposed in the receiving space of the upper body 13 and the lower body 14 of the insulating body 10, and the metal piece 30 is provided with at least one opening 31 corresponding to the upper body 13 and the lower body 14 of the lower body 14. The front end of the metal piece 30 extends outwardly and then extends rearwardly and arches outwardly at the end to form a pair of elastic arms 32.

The metal inner casing 40 has a top wall 41, a bottom wall 42 and two side walls 43. The top wall 41, the bottom wall 42 and the two side walls 43 of the metal inner casing 40 collectively define a socket groove 44. A pair of notches 45 are recessed in the front end of the top wall 41 and the bottom wall 42 of the metal inner casing 40. The top wall 41 of the inner metal shell 40 and the rear end of the bottom wall 42 are respectively bent upward and downward and then bent back to form a pair of clamping pieces 46. The middle portion of the clamping piece 46 corresponds to the holding block 112 of the insulating body 10. A clamping opening 461 is defined, wherein the clamping piece 46 of the top wall 41 extends outwardly and then extends upwardly to form a pair of holding pieces 462. A pair of engaging holes 431 are defined in the engaging groove 18 of the insulative housing 10 at the front end of the two side walls 43 of the metal inner casing 40. The front end of the two side walls 43 of the metal inner casing 40 is bent inwardly corresponding to the hook groove 19 of the insulative housing 10 to form a pair of hooks 432.

The rear cover 50 is a long block-shaped integrally formed member, and the upper and lower surfaces of the rear cover 50 are recessed with a plurality of clamping slots 51 corresponding to the terminal slots 121 of the insulative housing 10, and the front ends of the rear cover 50 correspond to the fixing slots 16 of the insulative housing 10. A pair of fixing hooks 52 are formed to extend forward and extend inwardly at the ends. A rear portion of the rear surface of the rear cover 50 extends rearward to form a bump 53.

The metal casing 60 includes an upper casing 61 and a lower casing 62. The upper casing 61 has an upper wall 611 and two upper side walls 612 which are bent downwardly from both sides of the upper wall 611. The rear side of the upper wall 611 extends rearward to form a first contact portion 613. The upper side walls 612 of the upper casing 61 are provided with a plurality of bayonet openings 6121. The lower casing 62 has a lower wall 621 and two lower side walls 622 that are bent upwardly from both sides of the lower wall 621. The rear side of the lower wall 621 extends rearward and is curled upwardly on both sides of the end to form a circular second contact portion 623. The lower side walls 622 of the lower casing 62 are outwardly punched with a plurality of tabs 6221 corresponding to the bayonet 6121 of the upper side wall 612. The front end of the upper wall 611 of the upper casing 61 of the metal casing 60 and the front end of the lower wall 621 of the lower casing 62 respectively extend downward and upward and continue to extend on both sides of the extending portion to form a groove-shaped stopper piece 63.

The insulating case 70 is integrally formed on the outer and rear portions of the metal inner case 40 and the metal case 50.

Referring to the first figure, the third figure to the sixth figure, when the electrical connector is assembled, the plurality of conductive terminals 20 are placed in a mold, and the upper body 13 and the lower body 14 are integrally formed on the outside of the plurality of conductive terminals 20, respectively. The conductive terminal 20 is correspondingly disposed in the terminal groove 121 of the tongue plate 12 of the insulative housing 10.

The metal piece 30 is disposed in the recess 15 of the lower body 14. The protrusion 152 protruding in the groove 15 is correspondingly engaged with the opening 31 of the metal piece 30. The upper body 13 is covered from the top to the bottom. On the main body 14, the protrusions 152 protruding from the recesses 15 of the upper body 13 and the lower body 14 respectively pass through the openings 31 of the metal piece 30 and are engaged in the recesses 151 of the recesses 15. The metal piece 30 is mounted on the two holes 30. The accommodating space formed by the recess 15 is closed to improve the crosstalk of the high-frequency signal transmission. The arches of the elastic arms 312 on both sides of the metal piece 30 are accommodated in the slots 17 of the upper body 13 and the lower body 14 and extend outward. Due to the two side walls of the tongue plate 12 of the insulative body 10.

The metal inner casing 40 is sleeved from the front to the rear of the insulative housing 10 to receive the insulative housing 10 in the insertion slot 44 of the metal inner casing 40. The top wall 41 of the inner metal casing 40 and the bottom wall 42 protrude rearwardly from the clamping piece 46. The holding block 112 protruding from the holding groove 111 is engaged with the clamping opening 461 formed in the clamping piece 46 to prevent the metal inner casing 40 from sliding forward. The de-insulation body 10, the holding piece 462 on both sides of the clamping piece 46 of the top wall 41 protrudes upward from the upper surface of the base portion 11 of the insulative housing 10, and the top wall 41 and the bottom wall 42 of the metal inner casing 40 are recessed at the front end. The slot 45 is exposed to the mating connector (not shown) for electrical connection, and the engaging hole 431 of the two side walls 43 of the metal inner casing 40 is fixed to the outside of the engaging slot 18 of the insulative housing 10 . The hook 432 of the two side walls 43 of the metal inner casing 40 is correspondingly engaged with the hook groove 19 of the insulative housing 10 to further fix the metal inner casing 40 to prevent it from being detached. The body 10, the elastic arm 32 of the metal piece 30 arches against the two side walls 43 of the metal inner casing 40 to enhance the EMI shielding effect, and the holding piece 462 of the metal inner casing 40 is upwardly abutted against the upper surface of the metal casing 60. The upper wall 611 of the body 61.

The rear cover 50 is engaged with the insulative housing 10 from the rear to the front. The fixing hooks 52 of the rear cover 50 are hooked into the fixing slots 16 of the insulative housing 10, and the clamping slots 51 of the rear cover 50 are correspondingly arranged in the insulative housing 10. The rear end of the receiving slot 113 is in one-to-one correspondence with the terminal slot 121.

The metal casing 60 is wrapped around the insulating body 10, the metal inner casing 40 and the rear cover 50, and the combination of the insulating body 10, the metal inner casing 40 and the rear cover 50 is fixed to the lower wall of the lower casing 62 of the metal inner casing 60. In the concave space of the 621 and the lower side wall 622, the stopper piece 63 of the lower wall 621 of the metal casing 60 is fixed to the front end of the base portion 11 of the insulative housing 10 to prevent the insulative body 10 from sliding during the insertion and removal of the mating connector. The metal outer casing 40 is engaged in the concave groove of the stopper piece 63 of the lower casing 62, and the upper casing 61 of the metal casing 60 is closed downwardly of the lower casing 62, and the metal casing 60 is The stopper piece 63 of the upper wall 611 is fixed to the front end of the base portion 11 of the insulative housing 10, the metal inner casing 40 is engaged in the concave groove of the stopper piece 63 of the upper casing 61, and the card of the lower side wall 622 of the lower casing 62 The tongue 6221 is correspondingly engaged with the bayonet 6121 of the upper side wall 612 of the upper casing 61, and the first contact portion 613 of the upper casing 61 is fixed to the lower casing. A circular second contact end portion 6232 is enclosed and connected to a second electrical contact portion 623.

The insulating case 70 is integrally formed on the outside of the metal inner case 40 and the metal case 60.

Referring to the first to third and seventh to ninth drawings, an electrical connector is provided for the second preferred embodiment of the present invention, the structure of which is substantially the same as that of the first preferred embodiment. The electrical connector includes an insulative housing 10, a plurality of conductive terminals 20, a metal sheet 30, a metal inner casing 40, a printed circuit board 80, a set of metal housings 60, and an insulative housing 70.

Referring to FIG. 5, the insulating body 10 is vertically symmetric with a horizontal plane as a plane of symmetry, and includes a base portion 11 and a tongue plate 12 projecting forward from a central portion of the front surface of the base portion 11. Upper and lower surfaces of the base portion 11 of the insulating body 10 A pair of latching slots 111 are recessed downwardly and upwardly, and a pair of latching blocks 112 are respectively protruded upward and downward in the middle of the latching slots 111. The upper and lower surfaces of the tongue plate 12 of the insulative housing 10 are respectively recessed downward and upward and extend rearwardly through the rear surface of the base portion 11 of the insulative housing 10 to form a plurality of terminal slots 121.

Further, the insulative housing 10 can be divided into an upper body 13 and a lower body 14 along the plane of symmetry, and the upper body 13 and the lower body 14 have a symmetrical structure. A recess 15 is formed on the opposite side of the upper body 13 and the lower body 14, and the two recesses 15 are closed to form a receiving space (not shown). The upper body 13 and the lower body 14 are provided with a pair of concave holes 151 and protrusions 152 on the lower surface of the groove bottom wall of the groove 15 and the lower surface of the base portion 11 of the upper body 13 and the upper portion 14 of the upper body 14 and are fitted to each other. The upper body 13 and the lower body 14 are respectively provided with a pair of slots 17 in the groove wall of the groove 15 of the tongue plate 12 at the rear end. The upper body 13 and the lower body 14 are respectively recessed inwardly on both sides of the front end of the tongue plate 12, and a pair of engaging grooves 18 are formed through the upper body 13 and the lower body 14 , and are respectively recessed inwardly on both sides of the front end of the engaging groove 18 . A pair of hook grooves 19 are formed through the upper and upper surfaces of the upper body 13 and the lower body 14 downward and upward.

The plurality of conductive terminals 20 are integrally formed in the terminal slots 121 of the insulative housing 10 and the ends of the conductive terminals 20 project rearward from the rear surface of the insulative housing 10.

The metal piece 30 is correspondingly disposed in the receiving space of the upper body 13 and the lower body 14 of the insulating body 10, and the metal piece 30 is provided with at least one opening 31 corresponding to the upper body 13 and the lower body 14 of the lower body 14. The front end of the metal piece 30 extends outwardly and then extends rearwardly and arches outwardly at the end to form a pair of elastic arms 32.

The metal inner casing 40 has a top wall 41, a bottom wall 42 and two side walls 43. The top wall 41, the bottom wall 42 and the two side walls 43 of the metal inner casing 40 collectively define a socket groove 44. A pair of notches 45 are recessed in the front end of the top wall 41 and the bottom wall 42 of the metal inner casing 40. The top wall 41 of the inner metal shell 40 and the rear end of the bottom wall 42 are respectively bent upward and downward and then bent back to form a pair of clamping pieces 46. The middle portion of the clamping piece 46 corresponds to the holding block 112 of the insulating body 10. A clamping opening 461 is defined, wherein the clamping piece 46 of the top wall 41 extends outwardly and then extends upwardly to form a pair of holding pieces 462. A pair of engaging holes 431 are defined in the engaging groove 18 of the insulative housing 10 at the front end of the two side walls 43 of the metal inner casing 40. The front end of the two side walls 43 of the metal inner casing 40 is bent inwardly corresponding to the hook groove 19 of the insulative housing 10 to form a pair of hooks 432.

The printed circuit board 80 is soldered and fixed between the two rows of conductive terminals 20 projecting rearward from the insulative housing 10.

The metal casing 60 includes an upper casing 61 and a lower casing 62. The upper casing 61 has an upper wall 611 and two upper side walls 612 which are bent downwardly from both sides of the upper wall 611. The rear side of the upper wall 611 extends rearward to form a first contact portion 613. The upper side walls 612 of the upper casing 61 are provided with a plurality of bayonet openings 6121. The lower casing 62 has a lower wall 621 and two lower side walls 622 that are bent upwardly from both sides of the lower wall 621. The rear side of the lower wall 621 extends rearward and is curled upwardly on both sides of the end to form a circular second contact portion 623. The lower side walls 622 of the lower casing 62 are outwardly punched with a plurality of tabs 6221 corresponding to the bayonet 6121 of the upper side wall 612. The front end of the upper wall 611 of the upper casing 61 of the metal casing 60 and the front end of the lower wall 621 of the lower casing 62 respectively extend downward and upward and continue to extend on both sides of the extending portion to form a groove-shaped stopper piece 63.

The insulating case 70 is integrally formed on the outer and rear portions of the metal inner case 40 and the metal case 50.

Referring to FIG. 1 to FIG. 3 and FIG. 7 to FIG. 9 , when the electrical connector is assembled, the plurality of conductive terminals 20 are placed in a mold, and the upper body 13 and the lower body 14 are integrally formed on the plurality of conductive materials. Outside the terminal 20, the conductive terminal 20 is disposed in the terminal groove 121 of the tongue plate 12 of the insulative housing 10 and protrudes rearward from the rear surface of the base portion 11 of the insulative housing 10.

The metal piece 30 is disposed in the recess 15 of the lower body 14. The protrusion 152 protruding in the groove 15 is correspondingly engaged with the opening 31 of the metal piece 30. The upper body 13 is covered from the top to the bottom. On the main body 14, the protrusions 152 protruding from the grooves of the upper body 13 and the lower body 14 are respectively engaged in the recesses 151 of the recesses 15 through the openings 31 of the metal piece 30, and the metal piece 30 is mounted on the two recesses. The accommodating space formed by the closing of the slot 15 is used to improve the crosstalk of the high frequency signal transmission. The arches of the elastic arms 312 on both sides of the metal piece 30 are placed in the slots 17 of the upper body 13 and the lower body 14 and extend outward. The two sides of the tongue plate 12 of the insulating body 10.

The metal inner casing 40 is sleeved from the front to the rear of the insulative housing 10 to receive the insulative housing 10 in the insertion slot 44 of the metal inner casing 40. The top wall 41 of the inner metal casing 40 and the bottom wall 42 protrude rearwardly from the clamping piece 46. The holding block 112 protruding from the holding groove 111 is engaged with the clamping opening 461 formed in the clamping piece 46 to prevent the metal inner casing 40 from sliding forward. The de-insulation body 10, the holding piece 462 on both sides of the clamping piece 46 of the top wall 41 protrudes upward from the upper surface of the base portion 11 of the insulative housing 10, and the top wall 41 and the bottom wall 42 of the metal inner casing 40 are recessed at the front end. The slot 45 exposes the conductive terminal 20 and is electrically connected to the mating connector. The engaging hole 431 of the two side walls 43 of the metal inner casing 40 is fixed to the outside of the engaging groove 18 of the insulative housing 10, and the metal inner casing 40 The hooks 432 of the two side walls 43 are correspondingly engaged with the hook grooves 19 of the insulative housing 10 to further fix the metal inner casing 40 from the insulating body 10 . The elastic arms 32 of the metal piece 30 are arched against the two side walls 43 of the metal inner casing 40 to enhance the EMI shielding effect, and the holding piece 462 of the metal inner casing 40 is upwardly abutted against the upper casing 61 of the metal casing 60. Upper wall 611.

The printed circuit board 80 is soldered and fixed between the two rows of conductive terminals 20 projecting rearward from the insulative housing 10.

The metal casing 60 is wrapped around the insulating body 10, the metal inner casing 40 and the rear cover 50, and the combination of the insulating body 10, the metal inner casing 40 and the rear cover 50 is fixed to the lower wall of the lower casing 62 of the metal inner casing 60. In the concave space of the 621 and the lower side wall 622, the stopper piece 63 of the lower wall 621 of the metal casing 60 is fixed to the front end of the base portion 11 of the insulative housing 10 to prevent the insulative body 10 from sliding during the insertion and removal of the mating connector. The metal outer casing 40 is engaged in the concave groove of the stopper piece 63 of the lower casing 62, and the upper casing 61 of the metal casing 60 is closed downwardly of the lower casing 62, and the metal casing 60 is The stopper piece 63 of the upper wall 611 is fixed to the front end of the base portion 11 of the insulative housing 10, the metal inner casing 40 is engaged in the concave groove of the stopper piece 63 of the upper casing 61, and the card of the lower side wall 622 of the lower casing 62 The tongue 6221 is correspondingly engaged with the bayonet 6121 of the upper side wall 612 of the upper casing 61, and the first contact portion 613 of the upper casing 61 is fixed to the lower casing. A circular second contact end portion 6232 is enclosed and connected to a second electrical contact portion 623.

The insulating case 70 is integrally formed on the outside of the metal inner case 40 and the metal case 60.

As described above, the upper body 13 and the lower body 14 of the present invention have a symmetrical structure in the horizontal direction, so that they have a forward and reverse insertion function, and the metal piece 30 is fixed between the upper body 13 and the lower body 14. Improve high frequency signal transmission crosstalk interference.

112‧‧‧Card block

13‧‧‧Upper ontology

14‧‧‧ Lower ontology

20‧‧‧Electrical terminals

30‧‧‧metal pieces

41‧‧‧ top wall

42‧‧‧ bottom wall

46‧‧‧Clamping piece

50‧‧‧ Back cover

53‧‧‧Bumps

61‧‧‧Upper casing

6121‧‧‧ bayonet

613‧‧‧First contact

62‧‧‧ Lower case

6221‧‧ ‧ tongue

623‧‧‧Second contact

Claims (12)

An electrical connector comprising:
An insulative housing includes a base portion and a tongue plate projecting forwardly from a central portion of the front surface of the base portion. The lower surface of the insulative body is recessed downwardly and upwardly and extends rearwardly through the base rear surface of the insulative housing to form a plurality of terminal slots. The insulating body can be divided into an upper body and a lower body. The opposite sides of the upper body and the lower body respectively form a groove, and the two grooves are closed to form a receiving space;
a plurality of conductive terminals integrally formed in the terminal slots of the insulative housing;
a metal piece corresponding to the receiving space that is mounted on the upper body of the insulating body and the recess of the lower body; and a metal inner casing including a top wall, a bottom wall and two side walls, a top wall and a bottom of the metal inner shell The wall and the two side walls are collectively formed into a socket, and the insulative housing is received in the insertion slot of the metal inner casing. The top end of the metal inner casing and the front end of the bottom wall are recessed backward with a pair of slots to expose the conductive terminals.
The electrical connector of claim 1, wherein the front end of the upper and lower surfaces of the base of the insulating body are respectively provided with a pair of holding grooves downwardly and upwardly, and are respectively protruded upward and downward in the middle of the holding groove. There is a pair of holding blocks, and the top wall and the bottom end of the inner metal shell are bent upward and downward respectively and then bent backward to form a pair of clamping pieces, wherein the middle of the clamping piece corresponds to the holding of the insulating body The block is provided with a clamping opening, and the two sides of the clamping plate of the top wall extend outwardly and then extend upward to form a pair of holding pieces, and the clamping piece of the top wall and the bottom wall of the metal inner casing is protruded backward. In the holding groove of the base of the insulating body, the engaging block protruding from the holding groove is engaged in the clamping opening formed in the clamping piece, and the holding piece protrudes upward from the upper surface of the base of the insulating body. The electrical connector of claim 1, wherein the upper body and the lower body of the insulative housing are provided with at least one pair of recessed holes and protrusions on the bottom wall of the groove and cooperate with each other, the metal piece The protrusions corresponding to the upper body and the lower body are provided with at least one opening, and the protrusions protruding from the grooves of the upper body and the lower body are respectively engaged into the concave holes of the groove through the openings of the metal piece. The electrical connector of claim 1, wherein the upper body and the lower body of the insulating body are respectively provided with a pair of slots in the groove wall of the groove rear end of the tongue plate. The front end of the metal piece extends outwardly and then extends backward and arches outwardly at the end to form a pair of elastic arms, and the arches of the elastic arms on both sides of the metal piece are placed in the slots of the upper body and the lower body and Extending outwardly from the two side walls of the tongue of the insulative body. The electrical connector of claim 1, wherein the upper body and the lower body of the insulative housing are respectively recessed inwardly on both sides of the front end of the tongue plate, and a pair of engaging grooves are formed through the upper body and the lower body. The front end of the two side walls of the metal inner casing is provided with a pair of engaging holes corresponding to the engaging grooves of the insulating body, and the engaging holes of the two side walls of the metal inner shell are correspondingly fixed to the outside of the engaging grooves of the insulating body. The electrical connector of claim 5, wherein the upper body and the lower body of the insulative housing are respectively recessed inwardly on both sides of the front end of the engaging groove and penetrate the lower surface of the upper body and the lower body downwardly and upwardly. Forming a pair of hook grooves on the upper surface, wherein the front end portions of the two side walls of the metal inner shell are bent inwardly corresponding to the hook grooves of the insulating body to form a pair of hooks, and the hooks of the two side walls of the metal inner shell are correspondingly engaged In the hook groove of the insulating body. The electrical connector of claim 1, further comprising a metal outer casing covering the insulating body and the metal inner casing, the metal casing comprising an upper casing and a lower casing, the upper casing having a The upper wall and the two upper side walls are formed by bending downwardly from the two sides of the upper wall. The rear side of the upper wall extends rearward to form a first contact portion, and the lower casing has a lower wall and is bent upward from both sides of the lower wall. Extending the two lower side walls, the rear side of the lower wall extends rearward and is bent to form a second contact portion, wherein the insulating body is fixed in the concave space of the lower wall and the lower side wall of the lower inner casing of the metal inner casing, the metal shell The upper housing is downwardly closed to the outside of the lower housing, and the first contact portion of the upper housing is electrically connected to the second contact portion of the lower housing. The electrical connector of claim 7, wherein the upper side walls of the upper casing are provided with a plurality of bayonet ports, and the two lower sidewalls of the lower casing are outwardly flushed corresponding to the bayonet of the upper side wall. There are a plurality of tabs, and the tabs on the lower side wall of the lower casing are correspondingly engaged in the bayonet of the upper side wall of the upper casing. The electrical connector of claim 7, wherein the upper end wall of the upper casing of the metal casing and the front end of the lower wall of the lower casing respectively extend to form a groove-shaped stopper piece on the metal casing. The stopper plates of the wall and the lower wall are fixed to the front end of the base of the insulating body, and the metal inner casing is engaged in the concave groove of the stopper piece of the upper casing and the lower casing. The electrical connector of claim 1, wherein the upper body and the lower body of the insulative housing are respectively recessed inwardly on both sides of the rear end of the base and form a pair of the upper body and the lower body downwardly and upwardly. a fixing slot, wherein the front end of the fixing slot has a recessed depth greater than a rear end, and the electrical connector further comprises a rear cover, wherein the upper and lower surfaces of the fixing body are recessed with a plurality of clamping slots corresponding to the terminal slots of the insulating body, and the front ends of the rear cover correspond to the two sides The fixing groove of the insulating body extends forward and extends inwardly at the end to form a pair of fixing hooks, and the fixing hook of the back cover is hooked into the fixing groove of the insulating body. The electrical connector of claim 7, further comprising an insulative housing integrally formed on the outer and rear portions of the metal inner and outer metal housings. The electrical connector of claim 1, wherein the end of the conductive terminal protrudes rearward from the rear surface of the insulating body, the electrical connector further comprises a printed circuit board, and the printed circuit board is soldered and fixed to the slave. The body extends between the two rows of conductive terminals.