Abstract: A bridgeless interleaved power factor corrector is used to convert an AC power source into a DC power source. The bridgeless interleaved power factor corrector includes a first conversion circuit, a second conversion circuit, a first power switch, a second power switch, a positive-half control switch, and a negative-half control switch. The first power switch is coupled to one of two positive-half operation units of the first conversion circuit and one of two negative-half operation units of the second conversion circuit. The second power switch is coupled to the other one of two positive-half operation units and the other one of two negative-half operation units. The positive-half control switch is coupled between a neutral end and a ground end, and the negative-half control switch is coupled between a line end and the ground end.

Abstract: A tire pressure sensor device setting method includes the steps of: providing a setting tool and selecting a control program to be downloaded, providing a tire pressure sensor device, driving an infrared transmitter of the setting tool to encode the selected control program into an infrared signal and to transmit the infrared signal to an infrared receiver of the tire pressure sensor device, enabling the tire pressure sensor device to transmit a feedback signal to the setting tool wirelessly to stop the setting tool from transmitting the infrared signal, and enabling a processor and memory unit of the tire pressure sensor to decode the received infrared signal into a decoded control program and to store the decoded control program in a memory thereof.

Abstract: A terminal encapsulated tire monitoring device electrically connectable with at least one contact of a read-write tool is disclosed to include a housing, a sensor unit mounted in the housing and consisting of a circuit board and a plurality of terminal connection portions, a plurality of conducting terminals partially embedded in the housing each having a first contact end electrically connectable by one contact of the read-write tool and a second contact end electrically connected to one terminal connection portion of the sensor unit.

Abstract: A terminal encapsulated tire monitoring device electrically connectable with at least one contact of a read-write tool is disclosed to include a housing, a sensor unit mounted in the housing and consisting of a circuit board and a plurality of terminal connection portions, a plurality of conducting terminals partially embedded in the housing each having a first contact end electrically connectable by one contact of the read-write tool and a second contact end electrically connected to one terminal connection portion of the sensor unit.

Abstract: A key mechanism includes a key body, a circuit board, and a elastic metal frame. The elastic metal frame comprising a main body, a first latching portion, and a second latching portion. The first latching portion and the second latching portion protrude from the main body. The main body is positioned between the key body and the circuit board. The elastic metal frame supporting the circuit board by the first latching portion and the second latching portion.

Abstract: A key mechanism includes a key body, a circuit board, and a elastic metal frame. The elastic metal frame comprising a main body, a first latching portion, and a second latching portion. The first latching portion and the second latching portion protrude from the main body. The main body is positioned between the key body and the circuit board. The elastic metal frame supporting the circuit board by the first latching portion and the second latching portion.