Abstract: Provided is a connector including a first connector having a first terminal and a first mating guide portion, and a second connector having a second terminal engaging the first terminal and a second mating guide portion fitted with the first mating guide portion, in which the first mating guide portion includes a fixed terminal for detecting the mating of the first connector and the second connector, the second mating guide portion includes a resilient terminal for detecting the mating of the first connector and the second connector, and the fixed terminal or the resilient terminal has a piezoelectric electric element.

Abstract: The present invention provides a phenol resin having, as a unit in its main-chain skeleton, a structure represented by the following general formula (I), as well as a resin composition using the same. According to the phenol resin of the invention, epoxylation thereof, chemical modification thereof, reaction thereof with an epoxy resin, and the like are facilitated. Phenol resins ranging from low-molecular-weight resins rich in fluidity to high-melting resins can be synthesized, and these phenol resins are industrially useful. When the phenol resin of the present invention is used as a hardening agent for epoxy resin etc., its resin composition can give a cured product of high Tg without deteriorating adhesiveness.

Abstract: An FPC plug, which fits with another connector, comprises a substrate part, a conductive pattern on the surface of the substrate part, a cable part and a connecting part connected to an end of the cable part. The connecting part includes a protruding terminal engaging a terminal of the other connector. The terminal is formed integrally with, and protrudes from a surface of, the conductive pattern; and includes a base end part connected to the surface of the conductive pattern, an upper end part having a width at most equal to the width of the base end part, and a side surface part between the upper end and base end parts. The side surface part recedes toward the inner side in the width direction more than the base end and upper end parts, and includes a minimal point at which the width is at a minimum.

Abstract: Provided is a connector including a first connector having a first terminal and a first mating guide portion, and a second connector having a second terminal engaging the first terminal and a second mating guide portion fitted with the first mating guide portion, in which the first mating guide portion includes a fixed terminal for detecting the mating of the first connector and the second connector, the second mating guide portion includes a resilient terminal for detecting the mating of the first connector and the second connector, and the fixed terminal or the resilient terminal has a piezoelectric electric element.

Abstract: An FPC plug, which fits with another connector, comprises a substrate part, a conductive pattern on the surface of the substrate part, a cable part and a connecting part connected to an end of the cable part. The connecting part includes a protruding terminal engaging a terminal of the other connector. The terminal is formed integrally with, and protrudes from a surface of, the conductive pattern; and includes a base end part connected to the surface of the conductive pattern, an upper end part having a width at most equal to the width of the base end part, and a side surface part between the upper end and base end parts. The side surface part recedes toward the inner side in the width direction more than the base end and upper end parts, and includes a minimal point at which the width is at a minimum.

Abstract: The present invention provides a phenol resin having, as a unit in its main-chain skeleton, a structure represented by the following general formula (I), as well as a resin composition using the same. According to the phenol resin of the invention, epoxylation thereof, chemical modification thereof, reaction thereof with an epoxy resin, and the like are facilitated. Phenol resins ranging from low-molecular-weight resins rich in fluidity to high-melting resins can be synthesized, and these phenol resins are industrially useful. When the phenol resin of the present invention is used as a hardening agent for epoxy resin etc., its resin composition can give a cured product of high Tg without deteriorating adhesiveness.