Abstract: A substrate, a diaphragm, and a piezoelectric actuator are laminated in this order in a first direction, the diaphragm includes a first layer containing silicon as a constituent element, a second layer disposed between the first layer and the piezoelectric actuator, and containing any one or both of at least one metal element selected from the group made of chromium, titanium, aluminum, tantalum, hafnium, and iridium, and silicon nitride, as a constituent element, and a third layer disposed between the second layer and the piezoelectric actuator and containing zirconium as a constituent element, and a fourth layer containing any one or both of at least one metal element selected from the group made of chromium, titanium, aluminum, tantalum, hafnium, and iridium, and silicon nitride, as a constituent element is provided on the third layer on a piezoelectric actuator side.

Abstract: A magnet fixing implement for fixing a magnet for rotation angle detection, attached to a rotation center portion of an indicator needle of an analog meter, includes a main body, a magnet holder provided on an upper surface of the main body, and configured to hold the magnet at a rotation center of the indicator needle, a slit formed in the main body in a flat shape perpendicular to the rotation center, and configured to accommodate the rotation center portion of the indicator needle, a rotation shaft holder provided below the slit of the main body, and configured to hold a rotation shaft of the indicator needle, and an indicator needle restricting portion protruding toward an outer side from an outer peripheral edge of the main body, and configured to restrict a rotation of the indicator needle with respect to the main body.

Abstract: An electrostatic capacitance-type input device includes a first member made of a non-conductive resin, a second member formed together with the first member and made of a conductive resin, a determination unit configured to determine the presence or absence of an input operation of an operator for the second member, based on a change in electrostatic capacitance of the second member, a circuit substrate in which the determination unit is mounted, the circuit substrate being fixed to an inner side portion of a cover member, and a conductive elastic member configured to lie between the second member and the circuit substrate and maintain an electrical connection between the second member and the circuit substrate using an elastic force.

Abstract: An electrostatic capacitance-type input device includes a first member made of a non-conductive resin, a second member formed together with the first member and made of a conductive resin, a determination unit configured to determine the presence or absence of an input operation of an operator for the second member, based on a change in electrostatic capacitance of the second member, a circuit substrate in which the determination unit is mounted, the circuit substrate being fixed to an inner side portion of a cover member, and a conductive elastic member configured to lie between the second member and the circuit substrate and maintain an electrical connection between the second member and the circuit substrate using an elastic force.

Abstract: A power drive unit is configured to comprise a heat sink, a power module pressed by a press member to the heat sink to be fastened thereto and a spring member that has a substantially circular shape and is installed between the power module and the press member. With this, the power module can be fastened to the heat sink without incurring layout limitation, degradation of heat release performance and the like. Also, since the power drive unit further includes a projection that protrudes from the press member to be engaged with an engagement hole bored at the center of the spring member, engagement of the projection of the press member with the engagement hole of the spring member functions to prevent displacement of the press member relative to the spring member, thereby making loads acting on the power modules uniform.

Abstract: A power drive unit is configured to comprise a heat sink, a power module pressed by a press member to the heat sink to be fastened thereto and a spring member that has a substantially circular shape and is installed between the power module and the press member. With this, the power module can be fastened to the heat sink without incurring layout limitation, degradation of heat release performance and the like. Also, since the power drive unit further includes a projection that protrudes from the press member to be engaged with an engagement hole bored at the center of the spring member, engagement of the projection of the press member with the engagement hole of the spring member functions to prevent displacement of the press member relative to the spring member, thereby making loads acting on the power modules uniform.

Abstract: The improved microphone with the removable connection to the phantom power supply facilitates the setting and provides elimination of the forgetful operation of switch-off, in e.g. convention center. The microphone provides both of manual and automatic operations of its indicator lamp having indication of the power supply, and has a manual switch which provides a common mode for operation of, and an automatic operation of both of its audio signal output and the indicator lamp. It also has a first circuit by which the indicator lamp automatically lights up, separately from the manual switch, in response to the connection to the power supply; and a second circuit by which the indicator lights out and the audio signal output is turned to off after the elapse of a predetermined time from the connection. The first and second circuits comprise respective integration circuits.

Abstract: In a case for housing an electronic circuit board, the opening edge of the case body is formed with a prescribed distance below the board mounting surface. The board is fastened on the mount of the case body with the fastening means. The case body is then inverted and is placed over a rising coating bath, and then the coating bath is raised close to the opening edge such that the board is dipped in the coating liquid and is coated. By this, application of the coating liquid to prescribed regions constituting coating-prohibited regions of the case body can be prevented. Cost can therefore be kept down and complication of the processing steps prevented because no masking of the case body is necessary. Moreover, the reliability of the electronic circuit unit can be enhanced and the need for a jib is eliminated. This helps to avoid complication of the fabrication process and makes another contribution to cost control.

Abstract: The present invention provides a low noise phantom powered capacitor microphone and a method of using a vacuum tube as an impedance converter of the microphone capsule in the capacitor microphone with no exclusive power supply.

Abstract: A fastening member for an electronic circuit board having an elastically deformable leg formed in a case for housing the electronic circuit board and a projection formed continuous with the leg to be engaged with the electronic circuit board so as to fasten the electronic circuit board on a prescribed mounting surface in the case. In the member, the projection is engaged with the electronic circuit board such that a prescribed angle is formed between a surface of the projection contacting the electronic circuit board, when the electronic circuit board is fastened on the mounting surface in the case. With this, since the tangent between the board contact surface and the electronic circuit board is variable within the range of the board contact surface, molding error can be tolerated (absorbed) and volumetric variation produced by temperature change can be readily coped with.

Abstract: A case for housing an electronic circuit board having a case body formed with an opening and a sealing member for sealing the opening, wherein one of the case body and the sealing member is formed with one fastening member composed of an elastically deformable leg and a projection continuous therewith for enabling attachment of the sealing member to the case body by engagement of the fastening member with a prescribed region of the other. The projection is continuous with the leg and has a first surface formed to contact the prescribed region at a prescribe angle and a second surface continuous with the first surface and formed parallel to the prescribed region. With this, molding error can be tolerated and stress owing to volumetric variation produced by temperature change or to vibration can be readily coped with. Moreover, it is possible to prevent release of the engagement of the projection with the prescribed region, and thus to prevent separation of the sealing member from the case body.

Abstract: A fastening member for an electronic circuit board having an elastically deformable leg formed in a case for housing the electronic circuit board and a projection formed continuous with the leg to be engaged with the electronic circuit board so as to fasten the electronic circuit board on a prescribed mounting surface in the case. In the member, the projection is engaged with the electronic circuit board such that a prescribed angle is formed between a surface of the projection contacting the electronic circuit board, when the electronic circuit board is fastened on the mounting surface in the case. With this, since the tangent between the board contact surface and the electronic circuit board is variable within the range of the board contact surface, molding error can be tolerated (absorbed) and volumetric variation produced by temperature change can be readily coped with.

Abstract: A case for housing an electronic circuit board having a case body formed with an opening and a sealing member for sealing the opening, wherein one of the case body and the sealing member is formed with one fastening member composed of an elastically deformable leg and a projection continuous therewith for enabling attachment of the sealing member to the case body by engagement of the fastening member with a prescribed region of the other. The projection is continuous with the leg and has a first surface formed to contact the prescribed region at a prescribe angle and a second surface continuous with the first surface and formed parallel to the prescribed region. With this, molding error can be tolerated and stress owing to volumetric variation produced by temperature change or to vibration can be readily coped with. Moreover, it is possible to prevent release of the engagement of the projection with the prescribed region, and thus to prevent separation of the sealing member from the case body.

Abstract: In a case for housing an electronic circuit board, the opening edge of the case body is formed with a prescribed distance below the board mounting surface. The board is fastened on the mount of the case body with the fastening means. The case body is then inverted and is placed over a rising coating bath, and then the coating bath is raised close to the opening edge such that the board is dipped in the coating liquid and is coated. By this, application of the coating liquid to prescribed regions constituting coating-prohibited regions of the case body can be prevented. Cost can therefore be kept down and complication of the processing steps prevented because no masking of the case body is necessary. Moreover, the reliability of the electronic circuit unit can be enhanced and the need for a jib is eliminated. This helps to avoid complication of the fabrication process and makes another contribution to cost control.

Abstract: An electronic control unit (10) mounted in a vehicle engine compartment, having a plastic case body (14), metal collars (32) each molded into the plastic case body, a metal base (12) having bolt through-holes (28) prepared in the same number of the metal collars such that a bolt passes through each metal collar and one of the holes corresponding thereto, and a heat-generating component (18) mounted on the base.

Abstract: The improved microphone with the removable connection to the phantom power supply facilitates the setting and provides elimination of the forgetful operation of switch-off, in e.g. convention center. The microphone provides both of manual and automatic operations of its indicator lamp having indication of the power supply, and has a manual switch which provides a common mode for operation of, and an automatic operation of both of its audio signal output and the indicator lamp. It also has a first circuit by which the indicator lamp automatically lights up, separately from the manual switch, in response to the connection to the power supply; and a second circuit by which the indicator lights out and the audio signal output is turned to off after the elapse of a predetermined time from the connection. The first and second circuits comprise respective integration circuits.

Abstract: An electronic control unit (10) mounted in a vehicle engine compartment, having a plastic case body (14), metal collars (32) each molded into the plastic case body, a metal base (12) having bolt through-holes (28) prepared in the same number of the metal collars such that a bolt passes through each metal collar and one of the holes corresponding thereto, and a heat-generating component (18) mounted on the base.