Abstract: A ground conducting layer and an antenna element conducting layer are set at a predetermined position in a cavity of a molding die, and molten resin is injected into the cavity, thereby molding a resin-formed member in which said ground conducting layer and said antenna element conducting layer are integrated. As a result of this, there can provided an antenna module comprising a resin member formed by molding to be a predetermined shape, a sheet-like ground conducting layer adhered to one surface of the resin member, a sheet-like antenna element conducting layer adhered to another surface opposing to the one surface of said resin member, and a feeder for feeding electricity to the antenna element conducting layer.

Abstract: A paste-like composition containing a lead salt of an organic acid and tin powder is applied on a pad array portion of a circuit board. Then, the paste-like compsition is heated so as to cause precipitation, thereby forming a solder layer formed of a Sn-Pb alloy substantially only on the pads. This precipitation is performed in a state that a liquid pool is formed on the pad array portion when the paste-like composition is liquefied by heating, and the tin powder is settled in the liquid pool. When an electronic part is mounted on the pads, first, preparatory solder layers are formed on the pads by the above-mentioned precipitation process. After a paste-like composition is applied on the preparatory solder layers, the electronic part is put on the paste-like composition. Then, the paste-like composition is heated, thereby soldering leads of the electronic part to the pads.

Abstract: An electronic connector which has a plurality of contacts associated in one or more rows in a connector housing, a shape memory spring associated in the connector housing for driving the contacts, the shape memory spring transmitting a recovery force generated when the shape memory spring reaches its transformation temperature or higher to the contacts while recovering the shape stored when the shape memory spring reaches its transformation temperature or higher and returning to the shape before the shape memory recovery by the spring force of the contact when the shape memory spring reaches below its transformation temperature. Thus, the electronic connector can mount or dismount contacts at each other without inserting or removing force or substantially without inserting or removing force in a simple structure with less number of parts.

Abstract: An electronic connector which has a plurality of contacts associated in one or more rows in a connector housing, a shape memory spring associated in the connector housing for driving the contacts, the shape memory spring having a beginning shape and transmitting a recovery force to the contacts generated when the shape memory spring reaches a transformation temperature or higher while recovering a stored shape when the shape memory spring reaches the transformation temperature or higher and returning to the beginning shape by the spring force of the contact when the shape memory spring reaches below its transformation temperature. Thus, the electronic connector can mount or dismount contacts to each other without an inserting or removing force or substantially without an inserting or removing force in a simple structure with a reduced number of parts.

Abstract: An electronic connector which has a plurality of contacts associated in one or more rows in a connector housing, a shape memory spring associated in the connector housing for driving the contacts, the shape memory spring having a beginning shape and transmitting a recovery force to the contacts generated when the shape memory spring reaches a transformation temperature or higher while recovering a stored shape when the shape memory spring reaches the transformation temperature or higher and returning to the beginning shape by the spring force of the contact when the shape memory spring reaches below its transformation temperature. Thus, the electronic connector can mount or dismount contacts to each other without an inserting or removing force or substantially without an inserting or removing force in a simple structure with a reduced number of parts.

Abstract: An optical switch having a pair of optical fibers which has a stopper projected on the inner surface of a housing, the paired large diameter optical fibers being formed at the ends thereof, inserted into the housing and contacted with the ends thereof opposed on the same axis with both ends of the stopper at a predetermined interval between relative end faces thereof, and a light shielding plate disposed telescopically in or out between the end faces of the optical fibers in the housing for conducting or interrupting an optical path over both the optical fibers, and an optical keyboard utilizing the optical switch.

Abstract: There is disclosed a coated optical fiber having a buffer layer around the outer periphery of an optical fiber. A curable resin reinforced coated layer made of reinforced fiber materials is disposed around the outer periphery of the buffer layer and a heatcurable resin is impregnated to the materials and cured. A curable resin layer having no fiber material is interposed between the buffer layer and the reinforced coated layer. The reinforced layer includes therein a multiplicity of elongated fiber materials.

Abstract: A method of exfoliating the coating of a coated optical fiber is described. A crack in the coating layer of the optical fiber is produced by bending means, cleaving the coating into a plurality of cleaved strip pieces while longitudinally enlarging the crack, and then cutting the strip pieces with an advantageous exfoliating tool. The exfoliating tool thus used is constructed to conveniently cleave the coating layer of the optical fiber and to cut the cleaved strip pieces. It does not damage the optical fiber upon exfoliating of the coating layer from the coated optical fiber, and can efficiently exfoliate the coating of the optical fiber.