Abstract: By integrating plural condenser microphone constituting bodies in an array state, a condenser microphone array is obtained. The condenser microphone array is formed by dicing a laminate of a circuit board forming member, a housing forming member, a spacer forming member, diaphragm sheet, diaphragm plate forming member and a cover forming member which form a part of the plural condenser microphone constituting bodies respectively. In an air chamber of each condenser microphone constituting body constituted in the laminate, a back plate and a contact spring are built.

Abstract: A circuit board forming member, a case forming member, a spacer forming member, a diaphragm sheet and a diaphragm plate forming member are laminated to form a portion, as excepting a back plate and a contact spring, of a condenser microphone, in plurality in a laminate. Moreover, the back plate and the contact spring are arranged in the air chamber, which is defined by the individual forming members, to form a plurality of condenser microphone constituents in the laminate. Next, the laminate is cut to separate the individual condenser microphone constituents thereby to manufacture the condenser microphones.

Abstract: A condenser microphone includes: a condenser portion including a vibration film and a plate disposed opposed to each other; an impedance conversion unit that converts the variations of the electrostatic capacity of the condenser portion to electric impedances; and a box member that stores the condenser portion and the impedance conversion unit therein, and includes a heat insulating portion.

Abstract: A microphone element having a diaphragm and a fixed electrode disposed opposite to each other on a silicon board having a central opening portion is mounted and fixed onto a base board having a sound hole. A perimeter-shaped side board and a cover board are mounted and fixed onto the board, thereby forming a back cavity on an upper side of the microphone element. The diaphragm and the fixed electrode are conducted to conductive layers of the cover board through conductive layers of the base board, and a conductive layer and a coiled spring in the side board respectively, and mounting on a surface of a printed board of an external apparatus can be carried out in a conductive layer on an upper surface thereof.

Abstract: A condenser microphone includes a condenser part in which a diaphragm is arranged opposed to a back plate, an impedance transformation element which transforms change in electrostatic capacitance of the condenser part into electric impedance, and a circuit which connects the condenser part and the impedance transformation element electrically. Further, the condenser microphone includes a casing which houses therein the condenser part, the impedance transformation element and the circuit, and is formed of an electric insulator. Herein, a conductive layer is provided on the periphery of the casing thereby to give electromagnetic shield ability to the casing.

Abstract: By integrating plural condenser microphone constituting bodies in an array state, a condenser microphone array is obtained. The condenser microphone array is formed by dicing a laminate of a circuit board forming member, a housing forming member, a spacer forming member, diaphragm sheet, diaphragm plate forming member and a cover forming member which form a part of the plural condenser microphone constituting bodies respectively. In an air chamber of each condenser microphone constituting body constituted in the laminate, a back plate and a contact spring are built.

Abstract: A circuit board forming member, a case forming member, a spacer forming member, a diaphragm sheet and a diaphragm plate forming member are laminated to form a portion, as excepting a back plate and a contact spring, of a condenser microphone, in plurality in a laminate. Moreover, the back plate and the contact spring are arranged in the air chamber, which is defined by the individual forming members, to form a plurality of condenser microphone constituents in the laminate. Next, the laminate is cut to separate the individual condenser microphone constituents thereby to manufacture the condenser microphones.

Abstract: To provide an electret capacitor microphone in which change of sensitivity characteristic caused by thermal deformation of an electret layer can be prevented even in the case where a reflow process is carried out. An electret capacitor microphone includes: an electret capacitor portion including a diaphragm, and a back electrode plate disposed opposite to the diaphragm through a spacer; an electrically insulating bush for electrically insulating/supporting an outer circumferential edge portion of the back electrode plate; a metal cover in which the electret capacitor portion and the electrically insulating bush are stored; and a gate spring having a pressing function for elastically pressing the back electrode plate toward the diaphragm to form a predetermined gap between the electrically insulating bush and an inner surface of a rear wall of the metal cover. Consequently, collapse of a spacer-abutting portion of an electret layer is prevented from being caused by thermal expansion.

Abstract: To provide an electret capacitor microphone in which change of sensitivity characteristic caused by thermal deformation of an electret layer can be prevented even in the case where a reflow process is carried out. An electret capacitor microphone includes: an electret capacitor portion including a diaphragm, and a back electrode plate disposed opposite to the diaphragm through a spacer; an electrically insulating bush for electrically insulating/supporting an outer circumferential edge portion of the back electrode plate; a metal cover in which the electret capacitor portion and the electrically insulating bush are stored; and a gate spring having a pressing function for elastically pressing the back electrode plate toward the diaphragm to form a predetermined gap between the electrically insulating bush and an inner surface of a rear wall of the metal cover. Consequently, collapse of a spacer-abutting portion of an electret layer is prevented from being caused by thermal expansion.

Abstract: An electroacoustic transducer adapted to be mounted on a printed circuit board in which a coil spring is accommodated and supported in a cylindrical recess of a frame while it is fixed to neither a terminal plate nor the frame. Particularly, a protruding pin of the coil spring is passed through a though hole of the terminal plate to allow a leading portion of the protruding pin to be hooked thereon. When the electroacoustic transducer is mounted on the printed circuit board, any horizontal displacement between the compressed spring and the printed circuit board would not cause stress concentration on the coil spring since the coil spring is onlly horizontally shifted in the cylindrical recess until a coil portion of the coil spring hits against the wall of the cylindrical recess.

Abstract: An electroacoustic transducer adapted to be mounted on a printed circuit board in which a coil spring is accommodated and supported in a cylindrical recess of a frame while it is fixed to neither a terminal plate nor the frame. Particularly, a protruding pin of the coil spring is passed through a though hole of the terminal plate to allow a leading portion of the protruding pin to be hooked thereon. When the electroacoustic transducer is mounted on the printed circuit board, any horizontal displacement between the compressed spring and the printed circuit board would not cause stress concentration on the coil spring since the coil spring is onlly horizontally shifted in the cylindrical recess until a coil portion of the coil spring hits against the wall of the cylindrical recess.

Abstract: A method of ultrasonic welding for a resin case in which an ultrasonic vibration is applied to the resin case in a direction parallel to the welding surface.

Abstract: An electronic map display system for use on a vehicle comprises a display unit for displaying one of a map or a menu of the names of a plurality of particular regions, a map data storage medium for storing map data on the particular regions and name information on the particular regions, a manual controller having a name retrieval key, a setting key, and cursor keys, and an electronic control unit for controlling the display on the display unit in response to instructions from the manual controller. Upon reception of an instruction produced by the name retrieval key of the manual controller, the electronic control unit reads the name information on the particular regions from the map data storage medium, displays the region names as the menu on the display unit, and selects one of the displayed region names through operation of the cursor keys.

Abstract: An electronic map display system for use on a vehicle comprises a display unit for displaying one of a map or a menu of the names of a plurality of particular regions, a map data storage medium for storing map data on the particular regions and name information on the particular regions, a manual controller having a name retrieval key, a setting key, and cursor keys, and an electronic control unit for controlling the display on the display unit in response to instructions from the manual controller. Upon reception of an instruction produced by the name retrieval key of the manual controller, the electronic control unit reads the name information on the particular regions from the map data storage medium, displays the region names as the menu on the display unit, and selects one of the display region names through operation of the cursor keys.

Abstract: A hydraulic pressure control device in a vehicle anti-skid braking system includes a brake master cylinder, a wheel brake actuating cylinder for braking a wheel in response to a fluid pressure from the brake master cylinder, a directional control valve actuatable in response to a signal from a control unit which detects a wheel condition such as wheel skidding, and a pressure control valve for disconnecting the brake master cylinder from a fluid pressure supply passage when a fluid pressure is supplied from the wheel brake actuating cylinder into a fluid pressure return passage connected to the pressure control valve when the directional control valve is actuated.