Abstract: A kickstand includes a holder, a bar, a shaft assembly, a cam assembly, and at least one spring washer. The bar is pivotally connected to the holder by the shaft assembly. The cam assembly is engaged with the holder and the bar and pivotally connected to the shaft assembly, so as to allow the bar to rotate relative to the holder to a closing position or an opening position selectively. The spring washer is engaged with the shaft assembly and abuts against the cam assembly.

Abstract: A kickstand includes a holder, a bar, a shaft assembly, a cam assembly, and at least one spring washer. The bar is pivotally connected to the holder by the shaft assembly. The cam assembly is engaged with the holder and the bar and pivotally connected to the shaft assembly, so as to allow the bar to rotate relative to the holder to a closing position or an opening position selectively. The spring washer is engaged with the shaft assembly and abuts against the cam assembly.

Abstract: A battery holder (210) for mounting a button-type battery (200) on a printed circuit board (220) is provided. The battery holder comprises a resilient electrode plate (212), a ring (214) and a battery cap (216). The resilient electrode plate is soldered to positive contacts (222) of the printed circuit board. A positive electrode of the battery is put on and electrically connects with the resilient electrode plate to thereby connect electrically with the positive contacts on the printed circuit board. The ring is soldered to negative contacts (224) of the printed circuit board and surrounds the resilient electrode plate. The battery is accommodated within the ring. The battery cap is fixed and electrically connected to the ring and covers the battery. The battery cap also electrically contacts with a negative electrode (202) on a top of the battery. The negative electrode and positive electrode of the battery are separated by an insulation (206).

Abstract: A dust-proof structure (200) for an electronic device is disclosed. The electronic device includes a case (208) having a slot (208a) aligned with a card connector (204) in the electronic device. The dust-proof structure includes a frame (212) formed on the case and around the slot, and a dust-proof gate (210) made of resilient material. The dust-proof gate is attached to the case at a position surrounded by the frame and covering the slot. The dust-proof gate has a slit (210a) positioned communicating with the slot, wherein the slit extends along a direction parallel to a longitudinal length of the slot. To insert an electronic card (202) into the electrical device to electrically connect with the card connector, the card is moved first through the slot of the case and then the slit of the dust-proof gate.

Abstract: A battery holder (210) for mounting a button-type battery (200) on a printed circuit board (220) is provided. The battery holder comprises a resilient electrode plate (212), a ring (214) and a battery cap (216). The resilient electrode plate is soldered to positive contacts (222) of the printed circuit board. An anode of the battery is put on and electrically connects with the resilient electrode plate to thereby connect electrically with the positive contacts on the printed circuit board. The ring is soldered to negative contacts (224) of the printed circuit board and surrounds the resilient electrode plate. The battery is accommodated within the ring. The battery cap is fixed and electrically connected to the ring and covers the battery. The battery cap also electrically contacts with a cathode (202) on a top of the battery. The cathode and anode of the battery are separated by an insulation (206).

Abstract: A dust-proof structure (200) for an electronic device is disclosed. The electronic device includes a case (208) having a slot (208a) aligned with a card connector (204) in the electronic device. The dust-proof structure includes a frame (212) formed on the case and around the slot, and a dust-proof gate (210) made of resilient material. The dust-proof gate is attached to the case at a position surrounded by the frame and covering the slot. The dust-proof gate has a slit (210a) positioned communicating with the slot, wherein the slit extends along a direction parallel to a longitudinal length of the slot. To insert an electronic card (202) into the electrical device to electrically connect with the card connector, the card is moved first through the slot of the case and then the slit of the dust-proof gate.