摘要:
A driving mechanism using shape memory alloys comprises a first and a second shape memory alloys coils (1, 2), a pin-like drive member (3) connected to each of the shape memory alloys coils (1, 2) extending in the axis direction, a substrate (4) having a wiring pattern (11) and a drive circuit (4a) to supply current to the shape memory alloys coils (1, 2), and a magnetic latch part (9) to hold the drive member (3), and the magnetic latch part (9) has a latch position in the axis direction of the drive member (3), the drive circuit (4a) selectively current-drives the first and the second shape memory alloys coils (1, 2), the driven first or second shape memory alloys coils (1, 2) is heated and compressed to move the drive member (3) in the axis direction, and magnetic bodies (9a, 9b) provided to the drive member (3) is magnetically fixed at the latch position, thereby fixed and held in the axis direction.
摘要:
An active tube and its system are offered which can be directed by bending its tip, controlling the degree of bend, thereby easily capable of insertion into difficult positions, and which can be driven at low temperature at which it can be used for inspection and medical treatment. A bending mechanism (21) is constructed by wiring an SMA coil (21e) along an outer side of a working channel tube (21a). The bending mechanism (21) is inserted into an outer skin tube (25) with a plurality of built-in weights (22). A front tip (23) is attached to the front end side of the bending mechanism (21) as a tip (2) of an active tube (1). A main tube (4) is connected through the working channel tube (21a) at the tip (2). A wire (21g) is connected to the SMA coil (21e). Said wire (21g) is inserted to the behind end side (41) of the main tube (4) in a wiring channel (4B9 of the main tube, thereby makes it possible to drive the bending mechanism (21) from outside.
摘要:
A driving mechanism using shape memory alloys comprises a first and a second shape memory alloys coils (1, 2), a pin-like drive member (3) connected to each of the shape memory alloys coils (1, 2) extending in the axis direction, a substrate (4) having a wiring pattern (11) and a drive circuit (4a) to supply current to the shape memory alloys coils (1, 2), and a magnetic latch part (9) to hold the drive member (3), and the magnetic latch part (9) has a latch position in the axis direction of the drive member (3), the drive circuit (4a) selectively current-drives the first and the second shape memory alloys coils (1, 2), the driven first or second shape memory alloys coils (1, 2) is heated and compressed to move the drive member (3) in the axis direction, and magnetic bodies (9a, 9b) provided to the drive member (3) is magnetically fixed at the latch position, thereby fixed and held in the axis direction.
摘要:
The invention provides a semiconductor acceleration sensor which is small in size, light in weight, simple in manufacture, low in manufacturing cost, and high in accuracy, and which, with a switch-on time set to a predetermined value, is stable in operation. In a semiconductor acceleration sensor in which a central board 1 having a central contact section 11, and outside boards 2 at least one of which has an outside contact section 21 are stacked; the central board 1 has a weight 12 near the central contact section 11, and the outside board 2 having the outside contact section 21 has a weight confronting section 11 which confronts with the weight 12, for squeezed damping effect.
摘要:
A semiconductor acceleration sensor including a central board having a movable electrode section, an outside board having a stationary electrode section, and a sealing insulating section for joining the central board and the outside board which are laminated on each other, wherein the sealing insulating section has a conductive layer, and the conductive layer is a sealing member or an anodic bonding electrode.
摘要:
A method of making an active slender tube as implemented as a catheter, guide wire, or any other medical or non-medical micro-mechanical or -system or system's active micro-component is disclosed, comprising preparing an actuator made from a shape memory alloy (SMA) and forming at least a portion of a tubular body; disposing outside of SMA made actuator an elastically deformable outer skeleton coaxially therewith; and fastening together SMA made actuator and outer skeleton wire adjacent to non-insulated portions, step of fastening includes a step of passing an electric current through a lead wire while in an electroplating liquid to deposit a metal on lead wire and non-insulated portions from said liquid and thereby to electrically join SMA made actuator and outer skeleton together at corresponding areas.
摘要:
A reflective movable diaphragm unit 2 having diaphragm portions 25 formed by a circular SiO2 film, a mesa portion 22 and light-reflecting mirror portion 23 of the SiO2 film disposed in the center, and a ring-shaped spacer 24a and bonding layer 24b formed of metal layers in the circumferential edge portion of the diaphragm portion 25, whereby a pressure sensor is formed.
摘要:
Catheter of such a structure that Ti—Ni superelastic allow (SEA) tube has its outside covered with thin-film silicone rubber tube. The SEA tube at part whose flexion is desired is wrought to cut off multiple grooves (crenas) with thin joints left. The covering with the silicone rubber tube is effected without the use of its front end portion in the covering. When a negative pressure is applied to physiological saline placed therein, the front end portion works as a valve, and the silicone rubber tube at the wrought part yields inward so that flexion of the catheter occurs at that part.
摘要:
A scanning mirror unit for scanning a beam comprises: at least one cantilever which is formed by bonding an elastic material and a piezoelectric material together and supported by a base at its one end; and a movable mirror which is supported at least by a free end of the cantilever at its peripheral part. When voltage is applied to the piezoelectric material, the free end of the cantilever moves in a prescribed direction to press and move the peripheral part of the movable mirror while leaving a central part of the movable mirror at substantially the same position to cause a tilt to the movable mirror. With such composition of the scanning mirror unit, a reflecting member having a sufficient thickness (e.g. some hundreds of microns) can be employed for the movable mirror, by which a high power laser beam effective for treatment of affected parts, etc. can be reflected finely and durably.
摘要:
An active slender tube as implemented as a catheter, guide wire, or any other medical or non-medical micro-mechanical or -system or system's active micro-component is disclosed that has a simple structure which facilitates the active slender tube to be reduced in diameter and with the capability of being multi-functionalized. The slender tube is provided in its distal, active end portion in the form of “J” with a bending, a torsionally rotating, an extending and retracting and/or a stiffness control mechanism. These mechanisms are adapted to bend, torsionally rotate, extend/retract and adjust stiffness of, the active end portion, respectively, with precision. Each mechanism comprises an outer skeleton including a liner coil spring, and an SMA (shape memory alloy) made coil actuator disposed inside of the liner coil coaxially therewith and fastened thereto. In the extending and retracting mechanism, the SMA made actuator is fastened to the liner coil spring upon deformation to have a length varied from a length of the SMA made actuator in its natural state. In the torsionally rotating mechanism, the SMA made actuator is fastened to the liner coil spring upon deformation to have a coil diameter torsionally varied from a coil diameter of the SMA made actuator in its natural shape memory step. The stiffness control mechanism has an SMA made actuator in its natural shape memory state.