摘要:
There is provided a composite material for a heat dissipating plate which achieves both a high thermal conductivity and a low coefficient of thermal expansion and has a performance satisfactory as a heat dissipating plate and a method of production of a composite material which can produce the composite material at a low cost. For this reason, powder metallurgy is used to produce the composite material for a heat dissipating plate. The composite material for a heat dissipating plate which is fabricated by this method of production contains an aluminum alloy and silicon carbide. The particles of silicon carbide are in contact with each other.
摘要:
An electro-dynamic exciter includes a magnetic circuit assembly composed of an outer yoke having a cylindrical peripheral wall, and a bottom wall connected to one end of the peripheral wall, a flat magnet located within the outer yoke and placed on the bottom wall of the outer yoke, and a flat inner yoke placed on the magnet. A magnet gap is defined between the outer yoke and the inner yoke. The magnetic circuit assembly is vibrationally supported on a support panel by means of a flexible carrier. The support panel is located in a face-to-face relation to the other end of the peripheral wall of the outer yoke. The flexible carrier is made from a flexible sheet material. The flexible carrier includes an annular anchor section secured to the support panel, a cylindrical section connected to the anchor section and coaxially extending into the magnetic gap, a flexible section extending radially inwardly from the anchor section toward the inner yoke and secured to the inner yoke. The magnetic coil is wound around the cylindrical section.
摘要:
A sound producing device has an electroacoustic transducer mounted in a case. A sound discharging nozzle is projected from the case and communicated with an upper chamber above the electroacoustic transducer.
摘要:
There is provided a composite material for a heat dissipating plate which achieves both a high thermal conductivity and a low coefficient of thermal expansion and has a performance satisfactory as a heat dissipating plate and a method of production of a composite material which can produce the composite material at a low cost. For this reason, powder metallurgy is used to produce the composite material for a heat dissipating plate. The composite material for a heat dissipating plate which is fabricated by this method of production contains an aluminum alloy and silicon carbide. The particles of silicon carbide are in contact with each other.
摘要:
The purpose of the present invention is to reduce the size and thickness of an LED module in which a plurality of LED dies along with other electronic components are mounted on a circuit board, and at the same time to stabilize the operation of the module with respect to source voltage fluctuation. The LED module includes: a circuit board; a plurality of LED dies that are mounted on one surface of a circuit board as bare chips and constitute a series circuit; an FET die that is mounted on the one surface of a circuit board as bare chips and controls a current flowing through the plurality of LED dies; and a constant current circuit that is mounted on the one surface of a circuit board and is series-connected to the series circuit. The constant current circuit includes the FET die.
摘要:
An actuator, comprising at least one beam capable of generating flexural oscillations, at least one pair of electric supply terminals (23, 24) which supply oscillation-inducing electric power to the beam(s), and a holding mechanism which holds the beam(s), the holding mechanism including at least one holding member (12) to hold one portion of the beam(s) and a case (13) jointed to the holding member and configured to contain the beam(s) therein.
摘要:
An actuator, comprising at least one beam capable of generating flexural oscillations, at least one pair of electric supply terminals (23, 24) which supply oscillation-inducing electric power to the beam(s), and a holding mechanism which holds the beam(s), the holding mechanism including at least one holding member (12) to hold one portion of the beam(s) and a case (13) jointed to the holding member and configured to contain the beam(s) therein.
摘要:
A casing is provided to be mounted on a printed circuit. The casing has a lower casing and an upper casing. An actuator is provided in the casing, and an armature is supported in the casing so as to be vibrated by the actuator. A sound emanating hole is formed in a peripheral side wall of the upper casing, and a pressure releasing hole is formed in a peripheral side wall of the lower casing.