Abstract: In a power and data transmission method which can transmit power and information (data) simultaneously and contactlessly, and an apparatus therefor, a pair of coil units are magnetically coupled to each other. Each of the coil units has: a power transmission coil configured by a coil which is wound in a plane, and a magnetic shield member which is placed on a rear surface of the coil; and an information transmission coil configured by a coil which is wound in a plane, and a magnetic shield member which is placed on a rear surface of the coil, the coil diameter of the information transmission coil is made different from that of the power transmission coil, and the information transmission coil and the power transmission coil are stacked. Data are transmitted while power is transmitted.

Abstract: In accordance with a method of producing a ferrule with an optical fiber, a reinforcing pipe is adhered to a single-core fiber to form an adhesive portion that protrudes and tapers from a pipe end surface portion of the reinforcing pipe toward a front end of the single-core fiber. The single-core fiber includes an optical fiber and a coating. The coating is stripped from the front end of the single-core fiber to provide an exposed optical fiber portion and a coated optical fiber portion. The coated optical fiber portion has a coating end surface portion. The single-core-fiber is inserted in a ferrule provided with a first tapered hole and a second tapered hole until the coating end surface portion abuts against the first tapered hole and until the pipe end surface portion abuts against the second tapered hole. Thereafter, the single-core fiber is secured in the ferrule.

Abstract: In a power and data transmission method which can transmit power and information (data) simultaneously and contactlessly, and an apparatus therefor, a pair of coil units are magnetically coupled to each other. Each of the coil units has: a power transmission coil configured by a coil which is wound in a plane, and a magnetic shield member which is placed on a rear surface of the coil; and an information transmission coil configured by a coil which is wound in a plane, and a magnetic shield member which is placed on a rear surface of the coil, the coil diameter of the information transmission coil is made different from that of the power transmission coil, and the information transmission coil and the power transmission coil are stacked. Data are transmitted while power is transmitted.

Abstract: In a power and data transmission method which can transmit power and information (data) simultaneously and contactlessly to a USB device using a USB interface, and an apparatus therefor, a pair of coil units are magnetically coupled to each other. Each of the coil units has: a power transmission coil configured by a coil which is wound in a plane, and a magnetic shield member which is placed on a rear surface of the coil; and an information transmission coil configured by a coil which is wound in a plane, and a magnetic shield member which is placed on a rear surface of the coil, the coil diameter of the information transmission coil is made different from that of the power transmission coil, and the information transmission coil and the power transmission coil are stacked. Data are transmitted while power is transmitted to the USB device.

Abstract: Provided are a sheathed wire that can be processed without being covered with a protective material, a sheathed wire with a terminal, and a method of producing a sheathed wire with a terminal. In a sheathed wire (10) including: a core (16) made of a conductor (12) covered with an insulator (14); and a sheath (18) covering the circumferential surface of the core (16), at least a part of the sheath (18) is provided slidably with respect to the core (16) in the axial direction of the core (16), and the slidable part of the sheath (18) has a slit (20) from the outer surface thereof to the inner surface thereof in a manner that the slit (20) extends in the axial direction.

Abstract: In a state in which a front end of a single-core fiber is passed through an end surface portion of a reinforcing pipe, an inner surface of the reinforcing pipe and an outer peripheral surface of the single-core fiber are glued together by means of adhesive. By using the same adhesive, an adhesive portion is formed by curing it so as to protrude and taper from the end surface portion of the reinforcing pipe toward the front end of the single-core fiber. Thereafter, a coated optical fiber formed with the adhesive portion is inserted in a ferrule until an end surface portion of the coating of the single-core fiber abuts against the first tapered hole and until the end surface portion of the reinforcing pipe abuts against the second tapered hole. Then, the optical fiber is glued in the ferrule by means of adhesive.

Abstract: In accordance with a method of producing a ferrule with an optical fiber, a reinforcing pipe is adhered to a single-core fiber to form an adhesive portion that protrudes and tapers from a pipe end surface portion of the reinforcing pipe toward a front end of the single-core fiber. The single-core fiber includes an optical fiber and a coating. The coating is stripped from the front end of the single-core fiber to provide an exposed optical fiber portion and a coated optical fiber portion. The coated optical fiber portion has a coating end surface portion. The single-core-fiber is inserted in a ferrule provided with a first tapered hole and a second tapered hole until the coating end surface portion abuts against the first tapered hole and until the pipe end surface portion abuts against the second tapered hole. Thereafter, the single-core fiber is secured in the ferrule.

Abstract: A polygonal coil having a substantially square shape is manufactured by winding a conductive wire in the diameter direction of the core on the core in an overlapping manner by the use of a winding jig in which a first collar portion and a second collar portion are disposed at both ends of a core so as to be opposed to each other and four rod-shaped protrusions are disposed on a surface of the first collar portion opposed to the second collar portion so as to protrude in a radial shape centered on an end of the core,. As a result, it is possible to obtain a polygonal coil with high precision.

Abstract: An inductance device has a hollow center coil around which a conducting wire is wound so that a hollow portion is formed along a center axis line of the hollow center coil, a filler which is filled into the hollow portion of the hollow center coil, and includes magnetic powder or a compound including the magnetic powder, and an accommodation case which accommodates the hollow core coil and has a bottom, wherein the filler is filled into the accommodation case.

Abstract: An antenna coil has a simple structure and a high sensitivity and can be thinner. The antenna coil includes an X Y coil unit having an X axis coil and a Y axis coil wound around a core, a Z axis coil wound around the X Y coil unit, and a resin portion insert molded around the X Y coil unit and the Z axis coil. In the antenna coil, the X axis coil, the Y axis coil, and the Z axis coil are arranged so that the three coils have an axis in a direction orthogonal to each other, and the X Y coil unit and the Z axis are integrated by the resin portion.

Abstract: An antenna coil has a simple structure and a high sensitivity and can be thinner. The antenna coil includes an X Y coil unit having an X axis coil and a Y axis coil wound around a core, a Z axis coil wound around the X Y coil unit, and a resin portion insert molded around the X Y coil unit and the Z axis coil. In the antenna coil, the X axis coil, the Y axis coil, and the Z axis coil are arranged so that the three coils have an axis in a direction orthogonal to each other, and the X Y coil unit and the Z axis are integrated by the resin portion.

Abstract: When connecting an optical connector to an optical connector adaptor, there is a demand to position the optical connector with high precision with maintaining connection workability. In the optical connector of this invention has a key for positioning the optical connector around an axis of the optical connector adaptor by inserting the key into a key groove of the optical connector adaptor, and a spring structure which can elastically deform in the groove width direction of the key groove. Therefore, unsteadiness of the key can be prevented by pressingly inserting the key into the key groove, increasing the precision of the positioning. Furthermore, since a difference in the groove width of the key groove can be absorbed by the range of elastic deformation of the key, the optical connector is universally applicable for differences in groove widths depend on the type of the optical connector adaptor.

Abstract: When connecting an optical connector to an optical connector adaptor, there is a demand to position the optical connector with high precision with maintaining connection workability. In the optical connector of this invention has a key for positioning the optical connector around an axis of the optical connector adaptor by inserting the key into a key groove of the optical connector adaptor, and a spring structure which can elastically deform in the groove width direction of the key groove. Therefore, unsteadiness of the key can be prevented by pressingly inserting the key into the key groove, increasing the precision of the positioning. Furthermore, since a difference in the groove width of the key groove can be absorbed by the range of elastic deformation of the key, the optical connector is universally applicable for differences in groove widths depend on the type of the optical connector adaptor.