Abstract: An antenna module includes: a radiating element and a filter device including a plurality of resonators. The plurality of resonators include a first resonator and a second resonator, the second resonator being disposed at a final stage. The first resonator and the second resonator are each electrically coupled to the radiating element. A degree of a coupling of the resonator and the radiating element is weaker than a degree of a coupling of the resonator and the radiating element.

Abstract: A microphone holder includes a casing made of soft synthetic resin and formed with a recess and a sound hole open to the recess and a connector unit having conductive elastic strips partially embedded in a solid insulating lid made of hard synthetic resin; a microphone is snugly received in the recess, and the recess is closed with the solid insulating lid in such a manner that the conductive elastic strips are held in contact at inner contact portions to electrodes of the microphone and at the outer contact portions to a circuit board; the conductive elastic strips are embedded in the solid insulating lid during a molding for the solid insulating lid so that the assembling work is speeded up.

Abstract: In order to provide a microphone holder which can hold a microphone tightly and the holding operation can be performed easily, a microphone holder 10 comprises a holder casing 13 having an opening section 12 in one end of which a microphone 11 can be inserted and a connecting terminal 15 supported by the holder casing 13 so as to connect electrically the microphone 11 inside the holder casing and an outer section, the holder casing 13 comprises a side wall 20 and a bottom wall 21 communicating the side wall 20, an undercut sections 24 are provided on the upper edge of the side wall 20, the inside edge section 20 of the connecting terminal 15 is usually in the position having a space between the inside surface of the holder casing 13 and the inside edge section 20; thus, when the microphone 11 is inserted in the holder casing 13, the microphone 11 is held by being put between the undercut sections 24 and the inside edge section 29.

Abstract: A microphone holder includes a casing made of soft synthetic resin and formed with a recess and a sound hole open to the recess and a connector unit having conductive elastic strips partially embedded in a solid insulating lid made of hard synthetic resin; a microphone is snugly received in the recess, and the recess is closed with the solid insulating lid in such a manner that the conductive elastic strips are held in contact at inner contact portions to electrodes of the microphone and at the outer contact portions to a circuit board; the conductive elastic strips are embedded in the solid insulating lid during a molding for the solid insulating lid so that the assembling work is speeded up.

Abstract: The present invention relates to a method of manufacturing a sensor rotor with a minimum waste of material. The sensor rotor is manufactured by forming a plurality of ring pieces having outer and inner edges that are identical in curvature to each other, arranging the ring pieces in the shape of a ring, magnetizing the ring pieces to create opposite magnetic poles alternately in the circumferential direction of the ring pieces to form a magnetized ring, and fixing the magnetized ring to the inside of a press-in ring. Since the outer edge of each ring piece substantially coincides with the inner edge of the adjacent ring piece, it is possible to eliminate the waste of material between the adjacent ring pieces.

Abstract: In an injection mold for molding an article having an undercut at at least one end portion, the movable mold half has a slide core which defines the inner surfaces of the end portion and the undercut, and a main body which defines the inner surface of the other portion of the article. The slide core is divided, at the portion defining the inner surfaces of the end portion and the undercut, into a plurality of pieces in the direction perpendicular to both the ejecting direction and the direction in which the slide core is moved in perpendicular to the ejecting direction when the molded article is ejected from the mold. At least one of the pieces is adapted to be slid along an inclined surface which is at an angle to the ejecting direction larger than the angle at which the inclined surface or surfaces for the other piece or pieces are to the ejecting direction.