摘要:
An electro-acoustic transducer has a magnetic circuit, a frame, a diaphragm, a voice coil, a terminal, and a stopper. The frame is joined to a magnetic circuit. The diaphragm is joined to a circumferential edge of the frame. The voice coil is joined to the diaphragm and is partially provided at a magnetic gap of the magnetic circuit. The terminal is composed of a metal plate having spring property and conductivity, is partially fixed to the frame, and is electrically connected to the voice coil. The stopper is provided at an outer periphery of the metal plate of the terminal and extends from a main section of the terminal to the frame. The stopper restricts a bending range of the metal plate constituting the terminal to a level equal to or lower than a reversibility limit value of a metal material constituting the terminal.
摘要:
In an electro-acoustic converter, a frame is bonded to the magnetic circuit, and the diaphragm is bonded to a circumferential edge of the frame. The voice coil is attached to the diaphragm and a part thereof is located in a magnetic gap of the magnetic circuit. The terminal is made of a sheet metal having spring property and electrical conductivity, and a part thereof is fixed to the frame. The terminal has a bent portion and a contact portion, and is electrically connected to the voice coil. The stopper is provided around a portion of the terminal at one side nearer to the frame than the bent portion, and protrudes from a surface of the frame where the contact portion of the terminal protrudes. The stopper restricts bending of the terminal to an extent within a threshold value of reversibility of a material the sheet metal.
摘要:
To provide a connector that enables change in the arrangement of signal connections ‘S’ and grounding connections ‘G’, merely by putting short-circuit pins in the housing of the connector, but without needing any change made in the circuit pattern on printed circuit boards that are stacked one on another to be electrically connected one to another.The connector has a housing (2) and a number of vertical holes (7) pierced in and extending between a top and a bottom of the housing so as to penetrate it, the holes being for insertion of terminal pins (57). A front and rear walls (3, 4) of the housing respectively have horizontal slots (8a, 8b) arranged to form an upper row and a lower row to receive contacts (20, 21, 22), with each slot extending to intersect the corresponding vertical hole (7) at a right angle. One of the printed boards (40) is connected to the contacts held in the slots, and the terminal pins (57) surface mounted on the other printed circuit board are fitted in the vertical holes (7) so as to be electrically connected to the contacts (20, 21, 22). The connector further has short-circuit pins (30) and canalled apertures (9) that are formed in the front and rear walls (3, 4) each in communication with the two adjacent slots (8a, 8b), such that each short-circuit pin (30) fitted in the chosen one of the canalled apertures (9) is kept in touch with the two contacts (21, 22) held in the two adjacent slots, thereby establishing electrical engagement of the one contact (21) with the other (22), thus changing arrangement of signal connections ‘S’ and grounding connections ‘G’ on the printed circuit board (40).
摘要:
An electrodynamic electroacoustic transducer comprises: a first magnetic pole; a second magnetic pole that forms a magnetic gap between itself and the first magnetic pole and is arranged in a space excluding spaces in upper and lower face directions of the first magnetic pole; a yoke; a diaphragm; and a voice coil. The yoke magnetically couples one magnetic pole face of the first magnetic pole with one magnetic pole face of the second magnetic pole so as to support them. The diaphragm is arranged in a space in an upper face direction of the first magnetic pole and in a space in a lower face direction of the second magnetic pole, while its outer periphery is supported by the yoke. The voice coil is arranged in the magnetic gap and adhered to the diaphragm. At least one of the first magnetic pole part and the second magnetic pole part includes a magnet.
摘要:
A portable communication terminal employs an electro-acoustic transducer having openings on the housing. The openings of the transducer are coupled to a housing of the terminal or acoustic pipes unitarily formed with the housing of the transducer. An opening of the acoustic pipe faces an opening provided in the housing of the terminal. The terminal uses a transducer including a diaphragm, a cover closely jointed to an outer periphery of the diaphragm and facing a front face of the diaphragm, and a frame provided at a rear face of the diaphragm. The terminal and the transducer consume less power and yet radiate greater output sound pressure with smaller bodies. They can deliver sound from a display section, so that a user accepts the sound normally.
摘要:
An electrostatic micro switch includes a fixed electrode disposed on a fixed substrate; a movable substrate elastically supported by the fixed substrate, the movable substrate including a movable electrode facing the fixed electrode. The movable substrate includes a semiconductor including a plurality of regions having different values of resistivity and a region of high resistivity is disposed near the movable electrode.
摘要:
The vehicle occupant protection system can significantly reduce the peak deceleration of the vehicle occupant even with a small vehicle body. The system comprises a seat fitted with a seat belt which is supported on a vehicle body so as to be slidable in a direction of an input crash load, a first actuator for applying an acceleration of a same direction as the crash load upon detection of the vehicle crash to the seat, and a second actuator for applying an acceleration of an opposite direction from the crash load with a prescribed time delay following the detection of the vehicle crash to the seat. Thus, in case of a vehicle crash or other high deceleration situations, the seat is accelerated rearward upon the occurrence of a vehicle crash by the first actuator so that the restraining capability of the seat belt is enhanced by applying to the seat a deceleration higher than the vehicle body deceleration during an early phase of the vehicle crash. Thereafter, an acceleration in the opposite direction is applied to the seat by the second actuator so that the forward inertial force acting on the vehicle occupant at the time of the vehicle crash is canceled, and the equalization of the decelerations of the vehicle body, the seat and the vehicle occupant is achieved in an early stage of the crash.
摘要:
A seat back structure for a vehicle according to one aspect of the present invention including a headrest, a seat back frame, a pad disposed in front of a surface of the seat back frame, a backrest surface of the pad, and right and left side supports each provided on either side of the backrest surface in a seat width direction, in which a right slit portion and a left slit portion are provided between the backrest surface and the right and the left side supports, respectively, each of the right slit portion and the left slit portion penetrating the pad in the thickness direction of the pad and extending in a vertical direction of the pad, and the right and the left slit portions are spaced apart from each other in the seat width direction.
摘要:
A vehicle seat is provided comprising a seat back frame having right and left side frames, a headrest for supporting a head of a seat occupant, and a back-and-forth movable body provided inside a backrest that is positioned at a rear of the seat occupant, wherein a backward movement of the back-and-forth movable body forwardly moves the headrest to support the head of the seat occupant. The back-and-forth movable body is attached to each side frame through a link member and is provided with a backward protrusion protruding backward, and the backward protrusion extends laterally.