CN203617476U - electrical connector - Google Patents

Abstract

The utility model provides an electric connector, which is characterized in that a terminal group is positioned on the butt joint part at the front side of a base of a seat body, a limit groove is cut forwards at both sides at the back of the base, and an elastic buckling piece with a buckling part outwards turned towards the front is arranged on a side plate at both sides of a first shell body covered and positioned at the outside of the seat body, so that a base part of a second shell body is supported on the surface of a top plate of the first shell body by sliding backwards and forwards, and the elastic buckling piece is buckled in a buckling hole of the buckling part arranged on the side plate at both sides of the base part after a second shell body is pushed to the position, and is buckled in the limit groove forwards by the buckling piece inwards turned at the inner wall surface at the back of the buckling part on the side plate, the second shell body is positioned at the outside of the first shell body by utilizing a sliding buckling mode and is matched to present the positioning state of the laser three-axis directions of XYZ, and can be firmly combined without using a spot welding mode, thereby achieving the effects of stable structure, easy assembly and low cost.

Description

electrical connector

technical field

The utility model relates to an electrical connector, especially refers to a first housing covered and positioned on the outside of a seat, so that the second housing can be positioned outside the first housing by means of sliding and buckling, and the seat body presents a The positioning state in the XYZ three-axis direction can be firmly combined without using laser spot welding to achieve the effects of stable structure, easy assembly and low cost.

Background technique

Nowadays, with the rapid development of electronic technology, multimedia information and the Internet, electronic devices such as computers, notebook computers, ultra-thin notebook computers, tablet computers, and smart phones have been ubiquitous in every corner of society. The design of all kinds of electronic devices tends to be light, thin, short, and small. In order to reduce the volume of electronic devices, the components on the circuit board inside the electronic device must be small and precise, and the overall structural strength must be strengthened accordingly. In response to current development trends.

Furthermore, most of the electronic devices currently on the market use connectors to achieve connection with the circuit board, and most of the connectors can be connected to the cable inside, and are connected to a plurality of signal terminals or power terminals inside the connector. After one connection, another connector can transmit the signal or power to the control circuit through the circuit board for signal or power transmission. No matter the signal or power connector is provided with a terminal group on the base , and the terminal group is mostly positioned on the base body by means of plug-in assembly. However, as electronic devices become more and more miniaturized, the space for terminal group assembly on the base body becomes narrower and smaller, which causes the terminal The coplanarity of the group is not easy to maintain and it is easy to affect the quality and pass rate of welding. When the external plug is plugged in, the connector is often easily lifted up or shaken left and right due to plugging or collision force, and the overall structure is quite unstable. The welding portion of the terminal group and the solder structure between the soldering feet of the metal shell covered on the outside of the seat body and the circuit board are also prone to damage or peeling off, resulting in a high failure rate and high cost of the connector manufacturing process. Problems, even poor signal or loss of disconnection occur.

Therefore, there are manufacturers who further set up positioning pieces on the outside of the metal shell covered by the seat body to strengthen the overall structure. Please refer to Figure 9, which is a top view of the existing electrical connector, in which the body A is The terminal group A1 is positioned, and the inner casing B is positioned on the outside of the body A, and a docking space is formed between the inner casing B and the inside of the body A, and an outer casing C is positioned outside the inner casing B. Although the outer shell C can be combined with the circuit board by screw locking, and the outer shell C can be used to restrain the inner shell B to strengthen the overall structure, but the inner shell B and the outer shell C are welded by laser welding. After high-temperature melting and cooling process, solder joint C1 is formed to form a whole. However, in today's meager profit era, due to fierce competition among connector manufacturers, it is necessary to control production costs in order to obtain more profits. This laser welding method is used. The laser welding machine is very expensive, and it takes a lot of time to set up different connector processing steps. Considering the profit and production cost of connector products, not all manufacturers use laser welding machines for production. Therefore, how to carry out production without using laser welding machines and still achieve the structural strength of laser welding is the key to redesign for those engaged in this industry.

Contents of the invention

Therefore, in view of the above-mentioned existing problems and deficiencies, the designer of the new utility model began to design this kind of utility model by collecting relevant information, evaluating and considering it in many ways, and making use of years of experience in research and development in this industry for continuous trial production and modification. A new type of electrical connector was born.

For realizing above-mentioned object, the technical scheme that the utility model adopts is:

An electrical connector, characterized in that it comprises:

The base body has a base, and a pair of docking parts is provided at the front side of the base, and a terminal group is positioned on the docking part, and a limiting groove is respectively cut forward on both sides of the rear of the base;

A first shell cover is positioned outside the seat body, and has a top plate on the first shell, and the side plates provided on both sides of the top plate are provided with opposite buckling parts, and the buckling parts have at least one elastic buckle that turns outward toward the front;

A second housing has a base that slides from back to front against the surface of the top plate of the first housing, and buckles are provided on the side plates at both sides of the base, and the buckle has at least A buckle hole for the elastic buckle to be buckled inside, and a buckle piece that is turned inward and buckled forward in the limiting groove is provided on the inner wall behind the buckle part, and then The bottom side of the side plate extends outwards and is provided with a positioning foot.

In a preferred technical solution, the following technical features can also be added:

The buckle portion of the second housing is turned inwardly from the front edge of the button hole to form a limit stop that is against the side plate of the first housing and can be buckled by the elastic buckle thereon. piece, and cut grooves are formed at the upper and lower sides of the limit stopper.

A step-shaped abutment surface is formed on the inner side of the limiting groove of the seat body, and on the side plate of the first housing, at the rear side of the buckle part, there is a front section corresponding to the limiting groove. lack of groove, the periphery of the fastening piece of the second housing is cut with a sectional groove, and the end of the fastening piece is formed with an abutting end against the abutting surface of the limiting groove, the The abutting end is adjacent to the slit and is formed with a bent portion passing through and located at the notch.

A step-shaped abutment surface is formed on the inner side of the limiting groove of the seat body, and on the side plate of the first housing, at the rear side of the buckle part, there is a front section corresponding to the limiting groove. lack of groove, the periphery of the fastening piece of the second housing is cut with a sectional groove, and the end of the fastening piece is formed with an abutting end against the abutting surface of the limiting groove, the The abutting end is adjacent to the slit and is formed with a bent portion passing through and located at the notch.

The side plate of the first housing is located below the notch and is provided with a vertical welding leg extending outward, and a sectional groove is cut at the periphery of the elastic buckle on the side plate.

The top of the base of the seat body is provided with a protruding stopper, and there are protruding buckles on both sides of the stopper, and the two sides of the top plate of the first housing are provided with the protruding buckles in which the protruding buckles can be fastened. There is a buckle slot on the rear side of the top plate, and a slot for the stopper to be embedded in it is cut forward at the rear side of the top plate, and a slot on both sides of the slot is bent downward and is held against the base. Blocking sheet at the rear side of the seat.

The docking part of the seat body has a tongue plate, and a terminal group with a contact portion at one side is positioned on the tongue plate, and a welding hole passing through the outside of the seat body is provided at the other side opposite to the contact portion. part, and a docking space for the docking part to extend into is formed inside the first housing.

There is a bottom plate under the docking space of the first housing, and a plurality of resisting elastic pieces are arranged on the inner wall of the bottom plate, and slits are formed on the periphery of the resisting elastic pieces.

A horizontal extension sheet is provided at the end of the positioning leg of the second housing, and a perforation is provided on the surface of the extension sheet, and an upwardly bent bent portion is formed on the extension sheet adjacent to the side plate.

A fixing element is pierced in the through hole of the positioning foot.

Compared with the prior art, the utility model adopting the above-mentioned technical solution has the advantages of:

The terminal group is positioned on the docking part at the front side of the base of the seat body, and limit grooves are cut forward on both sides of the rear of the base, and the two sides of the first housing positioned outside the seat body are covered. The side plate at the side is provided with an elastic buckle that the buckle part turns outwards toward the front, so that the base part of the second housing can be slid from back to front and resisted on the surface of the top plate of the first housing, and When the second housing is pushed into position, the elastic buckle can be buckled in the buckle hole of the buckle part provided on the side plate on both sides of the base, and is placed by the inner wall surface behind the buckle part on the side plate. The inward-turning buckle is buckled forward in the limiting groove. This second housing is positioned outside the first housing by means of sliding buckle, and cooperates with the seat body to present a total of six free spaces in the XYZ three-axis direction. The high-degree positioning state can be firmly combined without laser spot welding, thereby achieving the effects of stable structure, easy assembly and low cost.

The bottom sides of the two side plates of the second housing are provided with positioning feet extending outwards, and perforations are provided on the surface of the extension pieces of the positioning feet, and fixing elements combined with the circuit board are pierced in each perforation. , when the external electrical connector plug is plugged into the first housing and electrically connected with the terminal group of the seat body, the positioning feet of the second housing can be combined and positioned on the circuit board to restrain the first housing Body, so that when the seat body is subjected to the force of plugging or collision, the first shell is restricted by the reaction force of the second shell without causing upward lifting, left and right shaking or structural damage, and at the same time prevents the welding part of the terminal group The solder structure on the circuit board is damaged, making the overall signal transmission quality more stable and reliable.

Description of drawings

Fig. 1 is the three-dimensional exterior view of the utility model;

Fig. 2 is a three-dimensional exploded view of the utility model;

Fig. 3 is a three-dimensional exploded view of another viewing angle of the utility model;

Fig. 4 is a three-dimensional exploded view of a preferred embodiment of the present invention before assembly;

Fig. 5 is a perspective view of a preferred embodiment of the present invention when assembled;

Fig. 6 is a top sectional view of a preferred embodiment of the present invention when assembled;

Fig. 7 is a three-dimensional top view sectional view of a preferred embodiment of the present invention after assembly;

Fig. 8 is a perspective view of another preferred embodiment of the utility model;

Fig. 9 is a top view of a conventional electrical connector.

Explanation of reference signs: 1-seat body; 11-base; 111-block; 112-convex buckle; 113-embedding groove; 114-positioning column; ;1212-recessed part; 122-terminal slot; 13-terminal group; 131-contact part; 132-welding part; 14-limiting groove; -top plate; 211-through hole; 212-buckle groove; 213-card groove; 214-blocking piece; 22-side plate; 221-missing groove; 232-cut groove; 24-bottom plate; 241-resist shrapnel; 242-cut groove; 3-second shell; 31-base; 311-through hole; 32-side plate; Hole; 332-limit block; 333-cut groove; 34-buckle tab; 341-cut groove; 342-resisting end; 343-bending part; 35-positioning foot; Perforation; 353-bending part; 36-fixing element; 4-circuit board; A-body; A1-terminal group; B-inner shell; C-outer shell; C1-welding spot.

Detailed ways

In order to achieve the above-mentioned purpose and effect, the technical means and the structure adopted by the utility model are hereby illustrated in detail with respect to the preferred embodiment of the utility model and its structure and function are as follows to facilitate a complete understanding.

Please refer to Fig. 1, Fig. 2, and Fig. 3, which are respectively the three-dimensional appearance diagram, the three-dimensional exploded view and the three-dimensional exploded view of another perspective of the utility model. It can be clearly seen from the figure that the utility model includes a seat Body 1, first housing 2 and second housing 3, wherein:

The seat body 1 has a base 11, and a docking portion 12 is provided at the front side of the base 11, and the base 11 and the docking portion 12 can be integrally formed or formed separately, and the docking portion 12 is relatively The preferred implementation has a tongue plate 121, and a downwardly turning blocking portion 1211 is formed on both sides of the tongue plate 121, and a concave portion 1212 is formed upwardly between the tongue plate 121 and the blocking portion 1211, but in actual application, the docking The part 12 can also be in the form of a slot (not shown in the figure), and a plurality of terminal slots 122 for the positioning of the terminal group 13 are recessed on the surface of the tongue plate 121, and a flat plate shape is provided on one side of the terminal group 13. The contact portion 131 of the contact portion 131 is provided on the other side of the contact portion 131 with a welded portion 132 passing through the rear of the base 11 to form a coplanar plane; The positioning groove 14 and a step-shaped resisting surface 141 are formed on the inner side of the limiting groove 14 .

Furthermore, a protruding block 111 is provided at the center of the top of the base 11 of the seat body 1 , and convex buckles 112 are provided at both sides of the block 111 , and the front side of the base 11 is located at the bottom of the docking portion 12 in the lateral direction. An embedding groove 113 is provided in the section, and positioning columns 114 are provided on both sides of the bottom of the base 11, but this part is related to the shape and shape of the base 11 and the docking part 12 (such as tongue plate or slot) of the seat body 1. There are many structural design methods, and the contact portion 131 of the terminal group 13 can also be bent in multiple stages according to actual needs or different structural designs, so as to form different types of electrical connectors for use. The equivalent changes and modification changes completed under the technical spirit of the invention should be included in the scope of patents covered by the utility model.

The first housing 2 is positioned outside the base 11 of the seat body 1, and a docking space 20 is formed inside the first housing 2 for the docking portion 12 to extend into it, and the first housing 2 There is a top board 21 above the docking space 20, and the side boards 22 provided on both sides of the top board 21 are provided with opposite buckling parts 23, and the buckling parts 23 have at least one elastic buckle 231 that is turned outward in the forward direction , and the periphery of each elastic buckle 231 is cut with a cut groove 232, and the side plate 22 of the first housing 2 is located at the rear side of the buckle part 23 and cut forward with a limit groove 14 corresponding to the seat body 1 There is a slot 221 at the bottom of the slot 221 , and a vertical welding foot 222 is provided extending outward from the bottom of the slot 221 .

However, both sides of the top plate 21 of the above-mentioned first housing 2 are provided with a plurality of through holes 211 and a buckle groove 212 behind the through holes 211, and a locking groove 213 is cut forward at the center of the back side of the top plate 21, and is located at Both sides of the card slot 213 are provided with downwardly bent blocking pieces 214; in addition, there is a bottom plate 24 below the docking space 20 of the first housing 2, and a through hole 211 is provided on the inner wall of the bottom plate 24. There are a plurality of resisting elastic pieces 241 , and each of the resisting elastic pieces 241 is also provided with a slot 242 around its periphery.

The second housing 3 has a base portion 31, and on the side plates 32 provided on both sides of the base portion 31, opposite buckle portions 33 are provided, and the buckle portion 33 has at least one buckle hole 331 and a buckle hole 331 The front edge of the stopper 332 is turned inwardly towards the rear, and a cutaway 333 is formed on the upper and lower sides of the stopper 332 , and the side plate 32 of the second housing 3 is located behind the buckle part 33 The inner wall surface of the buckle piece 34 is provided with a buckle piece 34 that turns inward in the forward direction, and a sectional groove 341 is cut at the periphery of the buckle piece 34, and a resisting end 342 is formed at the end of the buckle piece 34, and it resists The end 342 is adjacent to the slit 341 to form a bent portion 343; in addition, a plurality of through holes 311 are provided on both sides of the surface of the base portion 31 of the second housing 3, and a plurality of through holes 311 are formed extending outward from the bottom side of the side plate 32. The positioning foot portion 35 of continuous segment difference shape has a horizontal extension piece 351 at the end of the positioning foot portion 35, and each extension piece 351 is provided with a perforation 352 on the surface. The inclined bent portion 353 bent upward.

Please refer to Fig. 4, Fig. 5, Fig. 6, and Fig. 7, which are the three-dimensional exploded view of the preferred embodiment of the present invention before assembly, the three-dimensional appearance view during assembly, the top sectional view, and the three-dimensional top view after assembly. It can be clearly seen from the sectional view that when the utility model is assembled, the seat body 1 is first pushed into the docking space 20 from the rear opening of the first housing 2, and its docking portion 12 will extend into the docking space. A suspended state is formed in the docking space 20, and the block 111 of the base 11 is embedded in the slot 213 of the top plate 21, and after the base 11 is pushed into position, the convex buckle 112 of the base 11 can be Buckled in the buckle groove 212 of the top plate 21, and the blocking piece 214 of the top plate 21 is held against the rear side of the base 11 to form a stop position, and the rear side of the bottom plate 24 of the first housing 2 is embedded in the base The inside of the buckle groove 113 of 11 is positioned so that the first casing 2 is covered and positioned outside the seat body 1 and integrated into one body.

Continue to press the inner wall surface of the base 31 of the second housing 3 downward against the surface of the top plate 21 of the first housing 2, and then push the base 31 from the back to the front to make a sliding displacement on the second housing 3 , the front side of the side plate 32 will be pushed against the elastic buckle 231 of the buckle part 23 of the side plate 22, and the elastic buckle 231 will be elastically deformed inward by the pushing effect, and the second housing 3 Push it into position, so that the elastic buckle 231 can be buckled in the corresponding buckle hole 331 on the buckle part 33 of the side plate 32 after the process of elastic deformation and reset, and the end of the stopper 332 is held by the elastic buckle The blocking of 231 prevents the second housing 3 from sliding backwards and presents a limit position in the X-axis direction and the Z-axis direction, while the buckle piece 34 on the side plate 32 behind the buckle part 33 is buckled from the back to the front In the corresponding limit groove 14 on the base 11, and the bent part 343 of the buckle piece 34 passes through and is located at the slot 221 of the first shell 2 to present a position limit in the Z-axis direction, and then is held against The end 342 abuts against the abutting surface 141 at the inner side of the limiting groove 14 so that the second housing 3 will not slide forward to present a limit in the X-axis direction and the Z-axis direction, and the abutting end 342 can be received by the side plate 22 The blocking at the inner wall surface makes the second housing 3 present a limit position in the Y-axis direction. This second housing 3 is assembled and positioned outside the first housing 2 by means of sliding and snap-fitting, and is combined into one body and matched with the seat body. 1. It can present the positioning state of interlocking in the XYZ three-axis direction, and the first shell 2 and the second shell 3 can be firmly combined without using laser spot welding, providing manufacturers with another production method. The choice is not limited to the laser spot welding method, and it has the effect of stable blocking positioning and anti-retraction.

In the process of sliding displacement of the second housing 3, the rear side of the side plate 22 of the first housing 2 can be pushed back against the limit block 332 of the buckle portion 33 of the side plate 32, and the limit stop The piece 332 will be elastically deformed outward when it is pushed to the top, and when the second housing 3 is pushed into position, the elastic buckle 231 of the buckle part 23 can be buckled in the elastic buckle 23 after the process of elastic deformation and reset. In the buckle hole 331 of the buckle part 33, or the elastic buckle 231 is buckled at the end of the limit stopper 332 to form a position, and can be held against the side plate 22 by the limit stopper 332 to have appropriate elasticity The pre-force makes it difficult for the second housing 3 to shift or shake when sliding and fastening, so as to ensure the stability of the overall structure, thereby achieving the effects of stable structure, easy assembly and low cost.

Please refer to Fig. 2, Fig. 7 and Fig. 8 at the same time, which are respectively the three-dimensional exploded view of the utility model, the three-dimensional top view sectional view after the assembly of the preferred embodiment and the three-dimensional appearance view of another preferred embodiment, from the figure It can be clearly seen that the electrical connector of the present invention can be applied to the circuit board 4 inside the host computer, notebook computer, tablet computer or other electronic devices, so that the seat body 1 can be positioned on the circuit board 4, and The positioning column 114 at the bottom of the base 11 is embedded in the joint hole of the circuit board 4 downward, and the welding parts 132 of the terminal group 13 are respectively positioned at the corresponding contacts (not shown in the figure) on the circuit board 4, and at the same time After the soldering pins 222 at the lower sides of the side plates 22 of the first housing 2 are passed through the sockets of the circuit board 4 respectively, then the soldering pins 222 are firmly soldered by means of surface mount technology (SMT) or plug-in (DIP) soldering. It is arranged on the circuit board 4 and forms a good electrical connection.

When the seat body 1 and the first housing 2 are positioned on the circuit board 4, the positioning feet 35 on both sides of the second housing 3 can be supported on the circuit board 4 by the extension piece 351, and then the through hole 352 can be used. The fixed element 36 that passes through inside makes the second housing 3 be combined and positioned on the circuit board 4 or the casing, and the preferred implementation of the fixed element 36 can be a screw, but in actual application, it can also be a rivet, fixed Bolts or other elements with a fixing function are equivalently implemented. If screws are used as an example, the fixing element 36 can be inserted into the through hole 352 of the positioning foot 35, and then screwed into the corresponding lock on the circuit board 4 or the casing. The holes or nuts are combined into one by locking and fixing, and the overall structure is more stable.

When the plug of the external electrical connector (not shown in the figure) is plugged into the docking space 20 of the first housing 2 and forms an electrical connection with the contact portion 131 of the terminal group 13 on the docking portion 12 of the seat body 1 Because the seat body 1 is subjected to plugging or collision force, it will be transmitted to the welding part 132 of the terminal group 13 and the welding foot 222 of the first housing 2, which will cause displacement deformation or structural damage, and at the same time make the electrical connector It may be easy to lift up or shake left and right, so the first housing 2 can be restrained by means of the positioning feet 35 on both sides of the second housing 3 combined with positioning on the circuit board 4 or the casing, so that the seat body 1 When subjected to plug-in or collision force, the first shell 2 is restricted by the reaction force of the second shell 3 so as not to lift up, shake left and right or have structural damage. The welding feet 222 of the body 2 and the solder structure on the circuit board 4 are damaged, and because the first casing 2 and the second casing 3 are integrally formed of metal materials, the first casing 2 and the second casing can pass through 3 It has double shielding function to effectively suppress or filter out electromagnetic wave interference (EMI) and crosstalk interference generated during signal transmission, making the overall signal transmission quality more stable and reliable.

The above description is only illustrative, rather than restrictive, of the present utility model. Those of ordinary skill in the art understand that many modifications, changes or equivalents can be made without departing from the spirit and scope defined in the claims. But all will fall within the protection scope of the present utility model.

Claims (10)

1. An electrical connector, characterized in that, comprising: The seat body has a base, and a pair of docking parts is provided at the front side of the base, and a terminal group is positioned on the docking part, and a limiting groove is respectively cut forward on both sides of the rear of the base; A first shell cover is positioned outside the seat body, and has a top plate on the first shell, and the side plates provided on both sides of the top plate are provided with opposite buckling parts, and the buckling parts have At least one elastic buckle that turns outward toward the front; A second housing has a base that slides from back to front against the surface of the top plate of the first housing, and buckles are provided on the side plates at both sides of the base, and the buckle has at least A buckle hole for the elastic buckle to be buckled inside, and a buckle piece that is turned inward and buckled forward in the limiting groove is provided on the inner wall behind the buckle part, and then The bottom side of the side plate extends outwards and is provided with a positioning foot. the 2. The electrical connector according to claim 1, characterized in that: the buckle portion of the second housing is turned inwardly from the front edge of the button hole to a side plate against the first housing There is a limit block on which the elastic buckle can be buckled, and slots are formed on the upper and lower sides of the limit block. the 3. The electrical connector according to claim 2, characterized in that: a step-shaped resisting surface is formed on the inner side of the limiting groove of the seat body, and the buckling surface is located on the side plate of the first housing. There is a slot corresponding to the limit slot on the rear side of the front part, and a slot is formed on the periphery of the buckle piece of the second housing, and a resisting groove is formed at the end of the buckle piece. The abutting end is held on the abutting surface of the limiting groove, and the abutting end is adjacent to the sectional groove and is formed with a bent portion passing through and located at the notch. the 4. The electrical connector according to claim 1, characterized in that: a step-shaped abutment surface is formed on the inner side of the limiting groove of the seat body, and the buckling surface is located on the side plate of the first housing. There is a slot corresponding to the limit slot on the rear side of the front part, and a slot is formed on the periphery of the buckle piece of the second housing, and a resisting groove is formed at the end of the buckle piece. The abutting end is held on the abutting surface of the limiting groove, and the abutting end is adjacent to the sectional groove and is formed with a bent portion passing through and located at the notch. the 5. The electrical connector according to any one of claims 3 to 4, characterized in that: the side plate of the first housing is located below the notch and is provided with a vertical welding leg extending outward, and The periphery of the elastic buckle on the side plate is provided with a sectional groove. the 6. The electrical connector according to any one of claims 1 to 4, characterized in that: a protruding stop is provided on the top of the base of the seat body, and convex buckles are provided on both sides of the stop , the two sides of the top plate of the first housing are provided with buckle grooves for the buckle to be fastened therein, and a forward section is provided on the rear side of the top plate for the stopper to be embedded in it A card slot, and a blocking piece bent downwards and held against the rear side of the base is arranged on both sides of the card slot. the 7. The electrical connector according to any one of claims 1 to 4, wherein the butt joint portion of the base body has a tongue plate, and a terminal group with a contact portion at one side is positioned on the tongue plate , and the other side of the contact portion is provided with a welding portion passing through the outside of the seat body, and a docking space for the docking portion to extend into is formed inside the first housing. the 8. The electrical connector according to any one of claims 1 to 4, characterized in that there is a bottom plate below the docking space of the first housing, and a plurality of resisting elastic pieces are provided on the inner wall of the bottom plate , and the peripheral parts of these resisting shrapnels are provided with sectional grooves. the 9. The electrical connector according to any one of claims 1 to 4, wherein a horizontal extension piece is provided at the end of the positioning leg of the second housing, and a surface of the extension piece is provided with perforated, and an upwardly bent bent portion is formed adjacent to the side plate on the extension piece. the 10 . The electrical connector according to claim 9 , wherein a fixing element passes through the through hole of the positioning leg. 11 . the

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