Abstract: A mouse includes a bottom casing, a PCB with a controller fixed thereon and a roller unit assembled to the bottom casing, and a top casing coupled with the bottom casing. The bottom casing has a retainer plate and a backing plate in rear of the retainer plate. The retainer plate and the backing plate respectively define a location hole and a receiving recess thereon. The PCB defines an opening in front of the controller and a slit positioned between the controller and the opening. The backing plate passes through the slit while the retainer plate locates in front of the opening. The roller unit includes a roller bearing which has a location post extended forward from a front thereof to be inserted into the location hole, and a contact post extended rearward from a rear thereof to be received in the receiving recess so as to movably activate the controller.

Abstract: A receptacle for receiving a plug-in module with at least one depression at a side surface thereof includes a main body, an elastic element, a first resilient strip and a control element. The main body has a receiving chamber penetrating a bottom thereof for engaging the plug-in module and a first slot extending up and down defined in a front surface thereof and connecting the receiving chamber. The elastic element has an elastic portion received in an upper portion of the receiving chamber. The first resilient strip is received in the first slot, and defines a locking portion extending rearward at a lower portion thereof and penetrating into the receiving chamber for buckling to the depression of the plug-in module. The control element is for driving the locking portion to depart from the depression of the plug-in module for allowing the plug-in module to move outward due to the pulling of the elastic element.

Abstract: An USB application device includes a casing and a printed circuit board received in the casing. The printed circuit board includes a top surface disposed a plurality of contacts, and a bottom surface disposed a plurality of electrical elements. A first supporting portion is received in the casing and located between the bottom surface of the printed circuit board and the casing, which supports the printed circuit board and is in front of all the electrical elements and abuts against up front one of the electrical elements disposed on the bottom surface of the printed circuit board. Therefore, the first supporting portion supports a central portion of the printed circuit board to resist an external pressing force in order to prevent the printed circuit board from damage. Furthermore, the first supporting portion positions the printed circuit board during the fabricating procedure of the USB application device.

Abstract: An USB application device includes a casing and a printed circuit board received in the casing. The printed circuit board includes a top surface disposed a plurality of contacts, and a bottom surface disposed a plurality of electrical elements. A first supporting portion is received in the casing and located between the bottom surface of the printed circuit board and the casing, which supports the printed circuit board and is in front of all the electrical elements and abuts against up front one of the electrical elements disposed on the bottom surface of the printed circuit board. Therefore, the first supporting portion supports a central portion of the printed circuit board to resist an external pressing force in order to prevent the printed circuit board from damage. Furthermore, the first supporting portion positions the printed circuit board during the fabricating procedure of the USB application device.

Abstract: An USB application device includes a housing having a received room therein and a front opening connected to the received room, a PCB having opposite a rear end portion completely received in the receiving room and a front end portion completely extended outside the housing from the front opening and opposite a top surface and a bottom surface, contacts disposed on the top surface of the front end portion of the PCB and exposed outside of the housing, a shell engaged with the housing and completely covers the front end portion of the PCB and the contacts, and a protection element received in the shell and covering the bottom surface of the front end portion of the PCB. The contacts are exposed outside the protection element. The shell is made of metal material for improving ESD protection in order to comply with the USB standard specification.

Abstract: A USB application device includes a casing, a printed circuit board and a flexible supporter. The casing has a receiving space therein. The printed circuit board is completely receiving the printed circuit board and includes a top surface and a bottom surface opposite to the top surface. A plurality of contacts is disposed on the top surface of the printed circuit board. The flexible supporter is arranged in the casing and between the casing and the bottom surface of the printed circuit board. If the USB application device couples with a mating connector, the mating connector press the printed circuit board to urge the printed circuit board to press the flexible supporter. The flexible supporter is urged to be deformed by the press of the printed circuit board and to disperse the pressing force from the mating connector.

Abstract: An USB application device includes a casing having a top wall, a bottom wall, a fixing wall extended from the top wall and towards the bottom wall and an opening formed between the bottom wall and a bottom edge of the fixing wall, a PCB having a top surface, a bottom surface, a front end portion and a rear end portion, contacts disposed on the top surface of the front end portion, and an IC having a printed surface, and fixed on the second surface of a portion of the PCB and between the front and rear end portions. The IC and the portion of the PCB are sandwiched in the opening of the casing. The printed surface of the IC contacts an inner surface of the bottom wall of the casing. The bottom edge of the fixing wall contacts the top surface of the portion of the PCB.