1. Field of the Invention
The present invention relates to a connector, and particularly to a USB (Universal Serial Bus) connector mounted on a printed circuit board by means of soldering.
2. The Related Art
A conventional USB connector includes a dielectric housing, a plurality of signal terminals. The dielectric housing has a substantial rectangular base portion. One end of the base portion extends outward along an extending direction of the base portion to form an inserting portion. The other end of the base portion opposite to the inserting portion caves toward inside of the base portion to form a receiving cavity which penetrates through a side surface of the base portion. The inserting portion defines a plurality of terminal grooves communicating with the receiving cavity. Each signal terminal has a soldering foot. In assembly, the signal terminal passes through the receiving cavity and is secured in the terminal groove, with a part of the soldering foot received in the receiving cavity and a distal end of the soldering foot exposing beyond the side surface of the base portion to solder with a printed circuit board.
However, the receiving cavity must be designed to penetrate the side surface of the base portion to make the distal end of the soldering foot expose beyond the base portion, so the soldering foot is apt to deform and then excessively bias towards a side when an external force acts on the distal end of the soldering foot. Furthermore, as the USB connector is mounted on the printed circuit board by means of soldering the soldering foot with the printed circuit board, so the soldering temperature will be so high that may cause the base portion deform under the condition of the receiving cavity penetrating the side surface of the dielectric housing.
Accordingly, an object of the present invention is to provide a USB connector mounted on a printed circuit board. The USB connector includes an insulating housing which has a base portion. A rear surface of the base portion extends rearward to form an extending portion. Two sides of a rear surface of the extending portion define two receiving cavities, respectively, and penetrating a bottom of the extending portion. Two opposite sides of a front surface of the base portion respectively extend frontward to form an inserting portion. A separating wall is formed between two receiving cavities. Two side walls are formed outside the respective receiving cavities. A side surface of each inserting portion respectively defines a plurality of terminal grooves passing through the base portion and communicating with the corresponding receiving cavity. A shell encloses outside of the insulating housing. A plurality of signal terminals respectively have a fixing portion fixed in the terminal groove, a contacting portion extended from a front edge of the fixing portion and exposing out of the side surface of the inserting portion, and a soldering foot extended rearward and then bent downward from a rear edge of the fixing portion and received in the receiving cavity, with a distal end of the soldering foot extending beyond the bottom of the extending portion for being soldered to the printed circuit board. The soldering feet received in the same receiving cavity are substantially in alignment with each other along the extending direction of the extending portion. A fixing board is inserted in bottoms of the receiving cavities of the extending portion. The fixing board has a base board which defines a clipping slot penetrating a front edge thereof and clipping on the separating wall and two restraining slots at two sides of the clipping slot for constraining the soldering feet of the corresponding signal terminals therein.
As described above, the USB connector further has the fixing board with two restraining slots being inserted in the bottoms of the receiving cavities to make the soldering foot be restrained in the restraining slot of the fixing board, so the deformation of excessive biasing of the soldering foot will be avoided when an external force acts on the distal end of the soldering foot. Furthermore, since the fixing board is secured in the bottoms of the receiving cavities and abuts against the side wall, the deformation of the side walls toward insides of the receiving cavity will be avoided even when the USB connector solders on the printed circuit board with much higher temperature which induces the side walls deform toward insides of the receiving cavity.
The present invention will be apparent to those skilled in the art by reading the following description thereof, with reference to the attached drawings, in which:
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As described above, the USB connector 100 further has the fixing board 40 with two restraining slots 412 being inserted in the bottoms of the receiving cavities 12 to make the soldering foot 23 be restrained in the restraining slot 412 of the fixing board 40, so the deformation of excessive biasing of the soldering foot 23 will be avoided when an external force acts on the distal end of the soldering foot 23. Furthermore, since the fixing board 40 is secured in the bottoms of the receiving cavities 121 and abuts against the side wall 1210, the deformation of the side walls 1210 toward insides of the receiving cavity 121 will be avoided even when the USB connector 100 solders on the printed circuit board 60 with much higher temperature which induces the side walls 1210 deform toward insides of the receiving cavity 121.
The foregoing description of the present invention has been presented for the purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. Such modifications and variations that may be apparent to those skilled in the art are intended to be included within the scope of this invention as defined by the accompanying claims.
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