Seiko Epson Corporation

Kabushiki Kaisha Suwa Seikosha

Mamoru Miyasaka

Hajime Miyazaki

Kazuo Kawasumi

Osamu Miyazawa

Osamu Takahashi

Nobuhiro Koike

Tomio Ota

Imao Hiraga

Nobuo Ishikawa

Kenichi Hirota

A micropump of peristaltic drive system of pressing a tube having elasticity to transport a fluid is disclosed. The micropump includes: a pump module including the tube, a cam that presses the tube, and a cam shaft on which the cam is pivotally mounted; a drive module including a drive force transmission mechanism that transmits a drive force from a motor to the cam shaft; a coupling member that detachably couples the pump module and the drive module; and a linkage mechanism provided between the motor and the cam shaft to link the drive force.

Micropump, pump module, and drive module

A fluid transportation system includes: an elastic tube; a tube frame having a tube guide groove to which the tube is attached in a circular arc; a cam driving wheel interior of the tube and having a rotational center coinciding with the center of the circular arc of the tube guide groove; a first cam fixed to a center shaft of the cam driving wheel; a second cam rotatably supported by the center shaft; and a plurality of fingers radially extending from the rotation center between the tube and the first and second cams and pressing the tube by the rotation of the first and second cams, wherein when the fluid transportation system starts to operate, the first and second cams produce a state in which the second cam is attached to the first cam and at least one of the plural fingers closes the tube.

Fluid transport system with elastic tube and detaching cam arrangement

A micropump includes: a tube unit including a tube which has elasticity, and one portion of which is disposed in an arc shape, a plurality of fingers, which are disposed radiating from a direction of a center of the arc shape of the tube, and a guide frame, which holds the tube and the plurality of fingers; and a control unit including a cam, which sequentially presses the plurality of fingers in a direction in which a liquid flows, a drive force transmission mechanism, which transmits a torque to the cam, and a control circuitry, which carries out a control of a motor which drives the drive force transmission mechanism, wherein the tube unit and the control unit are attached stacked one on the other, and are detachable.

Tube unit, control unit, and micropump

A fluid transportation system includes an elastic tube, a tube frame to which the tube is attached such that the tube forms a circular arc, a first cam and a second cam disposed inside the tube, and fingers which radially extend from a rotation center in the space between the tube and the first and second cams. The first and second cams produce a first condition where the fingers are all released and a second condition where at least one of the fingers constantly closes the tube. The first and second cams sequentially press the fingers, and the fingers sequentially repeat closure and release of the tube so that fluid can continuously flow.

Fluid transportation system with elastic tube and detaching cam arrangement

In a generatorin an electronic-controlled mechanical timepiece, the winding coreof a coilarranged nearer to the perimeter of a base plateis made shorter than the winding coreof a coilarranged more inside. Accordingly, it is possible to make the area of an openingcan be made smaller in comparison with the prior art, and make the timepiece more small-sized by making smaller the outer diameter of the base plateas keeping the distance Dbetween the corner part of the openingand the perimeter of the base plateto the same degree as the prior art and thereby securing the strength of the base plate

Timepiece device

In magnetic read/write apparatus having a media hub (2) made of magnetic material provided with a magnetic disk (1) and a package so as to cover the magnetic disk with a shell, to position the media hub (2) in the axial direction is performed by attaching an end of a spindle hub (17) to a media hub (2), and to position the media hub in the radial direction is performed by attaching the inner side of a center core (4) integrally formed with the media hub (2) to the periphery of the spindle hub (17). Furthermore, a driving pin (21) for contacting the media hub (2) with the spindle hub (17) is provided at the end of the media hub (2) and in the inner side of the center core (4), thereby, making it possible to provide a small-sized spindle hub and an excellent head contact.

Magnetic read/write apparatus

A precision, reliable, analog timepiece uses plastic frame elements reinforced with metal, and plastic wheel and pinions pivoting in holes formed in the plastic of the frame elements. The plastic frame elements are separated into portions corresponding to the functional timepiece portions. Exposed areas of the reinforcing metal provide reference locations in molding the frame elements and for component mounting. The entire timepiece is assembled from one side of a base frame element.

Timepiece construction

An electronic analog calendar timepiece includes a mechanism for automatically correcting the date indication at the ends of months having less than 31 days. A second motor activates the month correction-mechanism in short months to advance the date dial by additional indicated days. Such irregular advancements occur in accordance with the condition of switches associated with the 29th, 30th, and 31st day positions of the date dial, and in accordance with data stored in memory to correlate with the displayed month of the year. A conventional driving mechanism associates with conventional time keeping circuitry to advance the hands and the day, date, and month indicators for all days occurring in the month. The month-end correcting mechanism is linked to the conventional driving mechanism by actuation of the second motor.

Growing community of inventors

Shiojiri, Japan

Mamoru Miyasaka