132results about How to "Small-sized" patented technology

There is provided a piezoelectric device for generating an acoustic signal in which an expansion mechanism expands a disposition of a laminated piezoelectric actuator by the principle of leverage. The mass of a base member placed in the expansion mechanism is larger than the mass of a vibration output member. An overall device size is small. The piezoelectric device has a pressurization structure for reducing a tractive force acting on the laminated piezoelectric actuator which is generated by the amplification. This enables provision of a piezoelectric device for generating an acoustic signal that is a small size, highly resistant to dropping impact, and has god acoustic performance with less sound leakage.

An electromagnetic vibrational diaphragm pump comprising an electromagnet portion having an electromagnet arranged in a frame, a vibrator which is supported in the electromagnet portion and equipped with a magnet, diaphragms with a large diameter and diaphragms with a small diameter which are successively connected with both ends of the vibrator, and the pump casing portions of the diaphragms with a large diameter and diaphragms with a small diameter which are fixed on the both end portions of the electromagnet portion, wherein the left and right pump casing portions have pump chambers respectively corresponding to the diaphragms with a large diameter and diaphragms with a small diameter. Medium pressure (about 50 to 200 kPa) can be generated.

A solid oxide fuel cell stack in which first and second cell plates are alternately stacked. The first cell plates comprises a substrate having a plurality of opening portions, a groove which extends through the plurality of opening portions formed on a lower surface of the substrate, a solid electrolyte layer which covers the opening portion formed on an upper surface of the substrate, a fuel electrode layer which covers the opening portions formed on the solid electrolyte layer, and an air electrode layer formed on the lower surface of the substrate so as to extend along the opening portions and the groove. The second cell plates has a structure in which the air electrode layer is replaced with the fuel electrode layer in the first cell plate. In this fuel cell stack, the air electrode layer of the first cell plate faces the air electrode layer of the second cell plate, and the fuel electrode layer of the first cell plate faces the fuel electrode layer of the second cell plate. A method of manufacturing the solid oxide fuel cell stack comprises preparing the first cell plate, preparing the second cell plate, alternately stacking the first and second cell plates, and collectively sintering the stacked first and second cell plates.

Provided are a cooling device coated with carbon nanotubes and method of manufacturing the same. Carbon nanotubes are dispersively coated on a surface of the cooling device that radiates generated by a predetermined apparatus or component through thermal exchange. Thus, a carbon nanotube structure is formed so that the cooling device can improve in a thermal radiation characteristic and become small-sized. As a result, electronic devices can be downscaled and heat generated by a highly integrated electronic circuit chip can be effectively radiated, thus increasing lifetime and performance of an operating circuit.

A switching device which can be small-sized by improving a shielding performance and can improve the reliability of switching characteristics. A permanent magnet disposed near stationary contacts is arranged in its pole-face perpendicularly of the axis of a moving contact member.

The present invention aims to provide a motor-mounted internal gear pump that is small-sized, less expensive and has high reliability, while utilizing a function of an internal gear pump that is suitable for high head. A motor-mounted internal gear pump has a pump section for sucking and discharging a liquid and a motor section for driving the same. The pump section has an internal rotor having teeth formed around its outer periphery, an external rotor having teeth formed around its inner periphery and a pump casing that accommodates both rotors and has a suction port for sucking a liquid and a discharge port for discharging a liquid. The motor section has a can that composes a part of the pump casing and formed of anon-magnetic material into a thin plate, a rotator arranged at the inside of the can for driving the external rotor or the internal rotor; and a stator arranged at the outside of the can for rotating the rotator.

A 3D display apparatus (2) is provided with: a plurality of displaying devices (11, 12) which are arranged on a visual line of a viewer (10) in series at a predetermined interval; and a controlling device (31–39) for controlling the displaying devices to respectively display images, so as to show a three dimensional image for the viewer. At least one (11) of the displaying devices except for a displaying device (12) which is positioned farthest from the viewer has an image displaying surface having both of a self-emitting property and a light transparency property.

A small-sized filter unit of a simple structure, as well as an X-ray tube unit and an X-ray imaging system both having the filter unit, are implemented, A filter unit in a first aspect of the present invention comprises a filter plate, the filter plate having a first filter, a second filter disposed in a first direction with respect to the first filter and a third filter disposed in a second direction having a predetermined angle from the first direction with respect to the first filter, a guide plate having a guide frame for movement of the filter plate in the first and second directions, and a drive device for moving the filter plate.

A portable measurement apparatus is presented for inducing and measuring fluorescent X-ray radiation. It comprises an X-ray source (303, 902, 1005, 1105) adapted to controllably irradiate a sample (301, 803) with X-rays, and a detector (305, 406, 1006, 1106) adapted to detect fluorescent radiation emitted by said sample (301, 803). The X-ray source (303, 902, 1005, 1105) is an X-ray tube, an anode of which comprises at least one of silver, rhodium and molybdenium. Consequently said X-ray tube is adapted to controllably emit L-line radiation of at least one of silver, rhodium and molybdenium.

The present invention relates to a static magnetic field applying structure for use in an atomic oscillator in which plural sets of magnetic field generating means are provided with spacing interposed among them, and a resonance cell is disposed in a space between the magnetic field generating means. The object of the present invention is to realize the static magnetic field applying structure which can be small-sized and produced at a low cost.

A fruit and vegetable peeler which is suitably used in general homes for peeling a small amount of fruits and vegetables, which is small-sized and light-weight, and which is further convenient in carrying and storage. A pair of clamp members are supported by a housing to lie in opposed relation, and a handle is fixed to a handle shaft extended externally of the housing. The housing accommodates a speed increasing gear mechanism for transmitting rotation of the handle shaft to a cup-shaped rotating blade, a transmission gear mechanism for transmitting the rotation of the handle shaft to the rotary shaft of the clamp member, and a rotating-blade swinging mechanism for converting the rotation of the handle shaft into a swing motion of the rotating blade along the circumference of a fruit/vegetable. The housing, a support frame for supporting the speed increasing gear mechanism, the transmission gear mechanism, and the rotating-blade swinging mechanism, and gears constituting those mechanisms are made of synthetic resin.

According to the present invention, an electromagnetic encoder includes a number of scale coils arranged on a scale along a measuring direction; and transmitting coils and receiving coils arranged on a grid to be movable relative to the scale in the measuring direction, in which a relative movement amount between the scale and the grid is detected based on variation in magnetic flux detected by the receiving coils via the scale coils at the time of exciting the transmitting coils, and the receiving coils are provided in the measuring direction to be a plurality of sets, one of the sets of the receiving coils being displaced by a ½ phase of a scale pitch relative to the other set of the receiving coils.