Electric connector
Technical Field
The present invention relates to an electrical connector, and more particularly, to an electrical connector with a metal protective bracket.
Background
Electrical connectors are necessary for making electrical connections and signal transfer between devices, assemblies and components, systems and systems, and form a fundamental component of a complete system. At present, the electric connector is widely applied to various electronic products. Board-to-board connectors (Board to Board Connector, BTB for short) are used to electrically connect two mutually parallel circuit boards, which typically include a plug connector and a receptacle connector that mate with each other. The plug connector and the socket connector respectively comprise an insulating body and a conductive terminal, wherein the insulating body mainly plays a role in insulating and positioning the conductive terminal, and the conductive terminal mainly plays a role in conducting. In general, the plug connector and the socket connector of the board-to-board connector further have a protection bracket to improve their strength, and the protection bracket of the plug connector further has a sidewall shielding portion covering the outer wall surface of the sidewall of the insulating body and a welding leg bent directly from the bottom edge of the sidewall shielding portion. The side wall shielding part is used for improving the strength of the side wall, and the welding pin is used for welding the protection bracket on the circuit board. However, when the connector is soldered to the circuit board, the solder acting on the solder leg extends to the side wall shielding portion via the solder leg, so as to generate a solder climbing phenomenon. Therefore, the protection support of the existing plug connector is easy to generate the phenomenon of tin climbing during welding under the condition of improving the strength of the plug connector.
It is therefore desirable to provide a new electrical connector that overcomes the above-mentioned drawbacks.
Disclosure of Invention
The invention aims to provide an electric connector with a protective bracket, which effectively solves the problem of tin climbing while ensuring the strength of the electric connector.
In order to achieve the above purpose, the invention adopts the following technical scheme: an electric connector comprises an insulating body extending along the longitudinal direction, conductive terminals fixed on the insulating body and protective brackets positioned at two longitudinal ends of the insulating body, wherein the insulating body is provided with two side walls extending along the longitudinal direction and two end walls connected with the two side walls. The protective bracket is fixed on the end wall and comprises an end wall reinforcing sheet covered on the end wall and a side wall reinforcing sheet at least partially covered on the side wall, wherein the side wall reinforcing sheet is connected with two transverse ends of the end wall reinforcing sheet. The side wall reinforcing sheet comprises a side wall outer wall shielding part, a bending part and a welding pin, wherein the side wall outer wall shielding part is covered on the side wall outer wall surface, the bending part is bent inwards from the side wall outer wall shielding part, and the welding pin extends out of the insulating body from the tail end of the bending part. The bending part is buried in the side wall of the insulating body, and a space exists between the lower side of the shielding part of the outer wall of the side wall and the welding pin and is filled with plastic of the insulating body.
In a preferred embodiment, the end wall reinforcing sheet has an end wall outer wall shielding portion and a welded portion bent outward from a bottom end of the end wall outer wall shielding portion, and the welded portion of the end wall outer wall shielding portion is disposed between a pair of outer ends of the welding pins.
In a preferred embodiment, the side wall outer wall shielding portions of the side wall reinforcing pieces are connected to both lateral ends of the end wall outer wall shielding portions, and the side wall outer wall shielding portions do not protrude beyond the outer wall surface of the side wall.
In a preferred embodiment, the bending portion is formed by bending inward and extending downward from the front end of the shielding portion of the outer wall of the side wall, and the bending portion is buried in the side wall of the insulating body.
In a preferred embodiment, the welding pins are exposed to the bottom surface of the insulating body and are positioned in front of the side wall outer wall shielding parts, and a space exists between the front ends and the lower sides of the side wall outer wall shielding parts and the welding pins.
In a preferred embodiment, the end wall reinforcing sheet has an end wall top surface shielding portion that covers the top surface of the end wall, the end wall outer wall shielding portion extending by bending downward from the longitudinal outside of the end wall top surface shielding portion; the side wall reinforcing sheet is further provided with a side wall top surface shielding part which is at least partially covered on the side wall top surface, the side wall top surface shielding part is connected to the two transverse ends of the end wall top surface shielding part, the side wall outer wall shielding part is formed by downwards bending and extending from the transverse outer side of the side wall top surface shielding part, and the side wall outer wall shielding part and the end wall outer wall shielding part are arranged at intervals.
In a preferred embodiment, the bending portion is formed by bending inward and extending downward from the lower side of the front end of the side wall outer wall shielding portion, and the bending portion is buried in the side wall of the insulating body.
In a preferred embodiment, the welding pins are exposed to the bottom surface of the insulating body and extend out of the insulating body from the tail ends of the bending parts in the transverse direction, the side wall outer wall shielding parts are located above the welding pins, and a space exists between the lower sides of the side wall outer wall shielding parts and the welding pins. In a preferred embodiment, the end wall reinforcing sheet has a bent portion connecting between the end wall outer wall shielding portion and the welded portion, and the bent portion is buried in the end wall of the insulating body.
In a preferred embodiment, the protection support is formed by punching and bending a metal piece, and the protection support is integrally injection-molded on two longitudinal ends of the insulating body.
Compared with the prior art, the invention has the following beneficial effects: the side wall reinforcing sheet comprises a side wall outer wall shielding part, a bending part and a welding pin, wherein the side wall outer wall shielding part is covered on the side wall outer wall surface, the bending part is bent inwards from the side wall outer wall shielding part, and the welding pin extends out of the insulating body from the tail end of the bending part. The bending part is buried in the side wall of the insulating body, and a space exists between the shielding part lower side of the outer wall of the side wall and the welding pin and is filled with plastic of the insulating body, so that the insulating body has the effects of sealing and isolating nickel and preventing tin from climbing, and the problem of tin climbing is effectively solved when the strength of the electric connector is ensured by the protective bracket. Meanwhile, the shielding part of the outer wall of the side wall shields the outer wall surface of the side wall, so that the protection support has enough contact allowance when the electric connector is inserted, and the contact stability when the electric connector is matched is further ensured.
Drawings
Fig. 1 is a schematic perspective view of an electrical connector according to a first embodiment of the present invention.
Fig. 2 is another angular perspective view of the electrical connector shown in fig. 1.
Fig. 3 is a perspective view of an insulative housing of the electrical connector of fig. 1.
Fig. 4 is a perspective view of the protective bracket of the electrical connector shown in fig. 1.
Fig. 5 is another angular perspective view of the protective bracket shown in fig. 4.
Fig. 6 is a schematic perspective view of an electrical connector according to a second embodiment of the present invention.
Fig. 7 is another angular perspective view of the electrical connector shown in fig. 6.
Fig. 8 is a perspective view of the dielectric body of the electrical connector of fig. 6.
Fig. 9 is a perspective view of the protective bracket of the electrical connector shown in fig. 6.
Fig. 10 is another angular perspective view of the protective bracket shown in fig. 9.
Detailed Description
Referring to fig. 1 to 5, a first embodiment of the present invention discloses an electrical connector 100, wherein the electrical connector 100 comprises an insulative housing 10 extending along a longitudinal direction, conductive terminals 20 fixed on the insulative housing 10, and protective brackets 30 disposed at two longitudinal ends of the insulative housing 10. The insulating body 10 is provided with two side walls 11 extending in the longitudinal direction and two end walls 12 connected to the two side walls 11. The side walls 11, the end walls 12 and the bottom wall of the insulating body 10 together define a central slot 13, and the slot 13 is used for plugging a mating connector (not shown).
Referring to fig. 4 and 5, the protection bracket 30 is formed by punching and bending a metal piece and is fixed on the end wall 12 of the insulation body 10, so as to improve the overall strength of the electrical connector 100. Meanwhile, the protection brackets 30 are integrally injection molded on the two longitudinal ends of the insulating body 10, so that the strength of the insulating body 10 is improved and the damage to the insulating body 10 during the insertion and extraction of the electric connector 100 is avoided. The protective bracket 30 includes an end wall reinforcing sheet 40 covering the end wall 12 and a side wall reinforcing sheet 50 covering at least partially the side wall 11, the side wall reinforcing sheet 50 being connected to both lateral ends of the end wall reinforcing sheet 40.
The end wall reinforcing sheet 40 includes an end wall top surface shielding portion 41 covering the top surface of the end wall 12, an end wall outer wall shielding portion 42 extending from the outer side of the end wall top surface shielding portion 41 in the longitudinal direction and bending downward, and a welding portion 43 bending outward from the bottom end of the end wall outer wall shielding portion 42, and the end wall outer wall shielding portion 42 shields the outer wall surface of the end wall 11. The top shielding part 41 of the end wall does not exceed the top surface of the end wall 12 and the outer shielding part 42 of the end wall does not exceed the outer wall surface of the end wall 12, i.e. the top shielding part 41 of the end wall and the outer shielding part 42 of the end wall do not increase the whole volume of the electric connector 100 while improving the strength of the end wall 12 of the insulating body 10. The solder feet 43 may be fixedly mounted on a circuit board (not shown) that is electrically connected to the electrical connector 100.
The side wall reinforcing sheet 50 is integrally injection molded on the insulating body 10 and comprises a side wall outer wall shielding portion 51 shielding the outer wall surface of the side wall 11, a bending portion 52 bending inwards from the side wall outer wall shielding portion 51, and a welding leg 53 extending out of the insulating body 10 from the tail end of the bending portion 52. The bending portion 52 is formed by bending inward and extending downward from the front end of the side wall outer wall shielding portion 51, and the bending portion 52 is buried in the side wall 11 of the insulating body 10. The welding pins 53 are exposed on the bottom surface of the bottom wall of the insulating body 10 and located in front of the side wall outer wall shielding portion 51, that is, a space exists between the front end and the lower side of the side wall outer wall shielding portion 51 and the welding pins 53, and the plastic of the insulating body 10 is filled.
In the present embodiment, the side wall outer wall shielding portions 51 of the side wall reinforcing sheet 50 are connected to both lateral ends of the end wall outer wall shielding portion 42, so that the end wall reinforcing sheet 40 is integrally connected to the side wall reinforcing sheet 50. The side wall outer wall shielding portion 51 does not exceed the outer wall surface of the side wall 11, i.e. the side wall outer wall shielding portion 51 does not increase the overall volume of the electrical connector 100 while enhancing the strength of the side wall 11 of the insulating body 10. Meanwhile, the bending portion 52 is buried in the side wall 11 of the insulating body 10, and the welding pin 53 is exposed to the bottom surface of the bottom wall of the insulating body 10 and extends out of the insulating body 10 along the lateral direction; namely, the plastic sealing of the insulation body 10 is used between the shielding portion 51 of the outer wall of the side wall and the solder pins 53, so as to have the effects of sealing and isolating nickel and preventing tin from creeping, and also to increase the bonding strength between the insulation body 10 and the protection bracket 30, and to increase the stability of the electrical connector 100 and the circuit board, and to provide stable electrical connection.
The soldering pins 53 of the protection bracket 30 may be fixedly soldered to a circuit board (not shown) electrically connected to the electrical connector 100. When the electrical connector 100 is mounted on a circuit board, the soldering pins 53 of the protective bracket 30 are soldered to the circuit board by solder. Meanwhile, because the space exists between the lower side of the shielding part 51 of the outer wall of the side wall and the welding pins 53 and the plastic of the insulating body 10 is filled, the shielding part has the effect of sealing and isolating nickel so as to achieve the effect of preventing tin from creeping, and the protection bracket 30 effectively solves the problem of tin creeping while ensuring the strength of the electric connector 100. Meanwhile, the shielding part 51 of the outer wall of the side wall covers the outer wall surface of the side wall 11, so that the protection bracket 30 has enough contact margin when the electric connector 100 is plugged, and further, the contact stability when the electric connector 100 is matched is ensured.
Referring to fig. 6 to 10, the electrical connector according to the second embodiment of the present invention has substantially the same structure as the electrical connector according to the second embodiment, and the electrical connector 100 includes an insulative housing 10 extending in a longitudinal direction, conductive terminals 20 held on the insulative housing 10, and protective brackets 30 disposed at two longitudinal ends of the insulative housing 10. The insulating body 10 is provided with two side walls 11 extending in the longitudinal direction and two end walls 12 connected to the two side walls 11. The side walls 11, the end walls 12 and the bottom wall of the insulating body 10 together define a central slot 13, and the slot 13 is used for plugging a mating connector (not shown).
The protection bracket 30 is formed by punching and bending a metal piece and is fixed on the end wall 12 of the insulation body 10, so as to improve the overall strength of the electrical connector 100. Meanwhile, the protection brackets 30 are integrally injection molded on the two longitudinal ends of the insulating body 10, so that the strength of the insulating body 10 is improved and the damage to the insulating body 10 during the insertion and extraction of the electric connector 100 is avoided. As shown in fig. 9 and 10, the electrical connector according to the second embodiment of the present invention is different from the electrical connector according to the second embodiment in that: the protective bracket 30 of the second embodiment includes an end wall reinforcing sheet 60 covering the end wall 12 and a side wall reinforcing sheet 70 covering the side wall 11 at least partially, the side wall reinforcing sheet 70 being connected to both lateral ends of the end wall reinforcing sheet 60.
The end wall reinforcing sheet 60 includes an end wall top surface shielding portion 61 that covers the top surface of the end wall 12, and an end wall outer wall shielding portion 62 that extends by bending downward from the outer side in the longitudinal direction of the end wall top surface shielding portion 61, and the end wall outer wall shielding portion 62 shields the outer wall surface of the end wall 11. The top shielding portion 61 of the end wall does not exceed the top surface of the end wall 12 and the outer shielding portion 62 of the end wall does not exceed the outer wall surface of the end wall 12, i.e. the top shielding portion 61 of the end wall and the outer shielding portion 62 of the end wall do not increase the overall volume of the electrical connector 100 while improving the strength of the end wall 12 of the insulating body 10.
The end wall reinforcing sheet 60 further includes a bending portion 63 bent inward and extending downward from the bottom edge of the end wall outer wall shielding portion 62, and a soldering portion 64 extending from the end of the bending portion 63 to the insulating body 10, wherein the soldering portion 64 can be fixedly mounted on a circuit board (not shown) electrically connected to the electrical connector 100. The bending part 63 is embedded in the end wall 12 of the insulating body 10, and the welding part 64 extends out of the end wall 12 of the insulating body 10 along the longitudinal direction, that is, a space exists between the lower side of the end wall outer wall shielding part 62 and the welding part 64 and is filled with plastic of the insulating body 10, so that the insulating body has the effects of sealing and isolating nickel and preventing tin from creeping; when the mating connector is pulled out obliquely, the welding leg on one side is usually the other side as the fulcrum, and in the present invention, the welding portion 43 of the end wall outer wall shielding portion 42 is disposed between the outer ends of the pair of welding legs 54, so as to increase the strength of the mating connector and the mating connector, and prevent the loosening phenomenon of the welding leg on the one side.
The side wall reinforcing sheet 70 is integrally injection molded on the insulating body 10 and includes a side wall top surface shielding portion 71 at least partially shielding the top surface of the side wall 11, a side wall outer wall shielding portion 72 shielding the outer wall surface of the side wall 11, a bending portion 73 bending inwards from the side wall outer wall shielding portion 72, and a welding leg 74 extending out of the insulating body 10 from the end of the bending portion 73. The side wall outer wall shielding portion 72 is formed by bending and extending downwards from the lateral outer side of the side wall top surface shielding portion 71, the bending portion 73 is formed by bending and extending downwards from the front end lower side of the side wall outer wall shielding portion 72, and the bending portion 73 is buried in the side wall 11 of the insulating body 10. The welding pins 74 are exposed on the bottom surface of the bottom wall of the insulating body 10 and extend out of the insulating body 10 along the transverse direction, the side wall outer wall shielding part 72 is located above the welding pins 74, that is, a space exists between the lower side of the side wall outer wall shielding part 72 and the welding pins 74 and is filled with plastic of the insulating body 10, so that the insulating body has the effects of sealing, isolating nickel and preventing tin from creeping.
In this embodiment, the side wall top surface shielding portion 71 is connected to both lateral ends of the end wall top surface shielding portion 61, and the side wall outer wall shielding portion 72 and the end wall outer wall shielding portion 62 are disposed at a distance from each other, so that the end wall reinforcing sheet 60 and the side wall reinforcing sheet 70 are integrally connected. The top shielding portion 71 of the side wall does not exceed the top surface of the side wall 11, and the outer shielding portion 72 of the side wall does not exceed the outer wall surface of the side wall 11, that is, the top shielding portion 71 of the side wall and the outer shielding portion 72 of the side wall do not increase the overall volume of the electrical connector 100 while enhancing the strength of the side wall 11 of the insulating body 10.
The solder feet 74 of the protective bracket 30 may be fixedly soldered to a circuit board (not shown) that is electrically connected to the electrical connector 100. When the electrical connector 100 is mounted on a circuit board, the solder feet 74 of the protective bracket 30 are soldered to the circuit board by solder. Meanwhile, because the space exists between the bottom edge of the shielding part 72 of the outer wall of the side wall and the welding pin 74 and the plastic of the insulating body 10 is filled, the shielding part has the effect of sealing and isolating nickel so as to achieve the effect of preventing tin from creeping, and the protection bracket 30 effectively solves the problem of tin creeping while ensuring the strength of the electric connector 100. Meanwhile, the shielding part 74 of the outer wall of the side wall covers the outer wall surface of the side wall 11, so that the protection bracket 30 has enough contact margin when the electric connector 100 is plugged, and further, the contact stability when the electric connector 100 is matched is ensured.
In summary, the above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the invention, i.e. all simple and equivalent changes and modifications that are defined by the claims and the specification shall fall within the scope of the invention.