Abstract: An advance and retreat assist tool includes a base unit, a fixing unit and a first tubular member. The advance and retreat assist tool further includes a fixing portion which fixes the treatment instrument to the first tubular member, a rotary portion which provided in the first tubular member and an advance and retreat mechanism which advances and retreats the first tubular member on the basis of the a rotation force of the rotary portion.

Abstract: An advance and retreat assist tool includes a base unit, an attachment portion which attaches the base unit to a treatment instrument insertion portion, a tubular member provided to advance and retreat relative to the base unit coaxially with a central axis of a hole portion and a fixing portion which fixes an endoscopic treatment instrument to the tubular member. The advance and retreat assist tool further includes a rotary portion which has an axis different from an axis of the tubular member and which rotates around the axis, and an advance and retreat mechanism.

Abstract: An advance and retreat assist tool includes a base unit, a first tubular member, a rotary portion and an advance and retreat mechanism. The advance and retreat assist tool further includes a hinge mechanism which switches to either a coaxial condition or a slanted condition.

Abstract: An advance and retreat assist tool includes a base unit, an attachment portion which attaches the base unit to a treatment instrument insertion portion so that the base unit is rotatable around a central axis of a treatment instrument insertion hole portion, and a first tubular member. The advance and retreat assist tool further includes a rotary portion and an advance and retreat mechanism.

Abstract: A shake correcting device can correct a shake occurring on a target device. The shake correcting device includes an angular velocity detector, a DC component detector, a controller, a panning detector, and a storage unit. When the panning detector changes from a state in which the panning is detected to a state in which the panning is not detected, the controller controls the DC component detector to output the value of a DC component of angular velocity of the target device stored in the storage unit when the panning detector does not detect panning, and then controls the DC component detector to output a DC component based on angular velocity of the target device detected by the angular velocity detector.

Abstract: An advance and retreat assist tool includes a base unit, a fixing unit and a first tubular member. The advance and retreat assist tool further includes a fixing portion which fixes the treatment instrument to the first tubular member, a rotary portion which provided in the first tubular member and an advance and retreat mechanism which advances and retreats the first tubular member on the basis of the a rotation force of the rotary portion.

Abstract: Provided is a recording medium playback device intended to achieve a reduction in power consumption by stopping disk rotation during a period in which no content data is being read, while improving playability and responsiveness to external key inputs or the like. A system control section 106 instructs a servo control section 105 to stop rotating a spindle motor 102 after an optical pickup 103 completely reads the content data that is being reproduced, and to forcibly rotate the spindle motor 102 in order to start reading the next content data to be reproduced when the remaining amount of data accumulated in a buffer memory 113 falls to a threshold n or lower, the threshold n being calculated based on (a) a stabilization time of the spindle motor 102, (b) a moving time of the optical pickup 103, and (c) a speed at which data is read from the buffer memory 113.

Abstract: In a wire-dot print head which comprises print elements arranged in a ring, each having an electromagnet formed of a core and a coil, and in which the electromagnets are divided into a plurality of blocks so that each block has a plurality of electromagnets, and a common current conduction control element is provided for each block and used to control current through the coils of the electromagnets in the block, the electromagnets of each of at least some of the blocks are disposed so as not to be physically adjacent to each other. Because of the above arrangement, currents through the coils due to magnetic interference between the adjacent electromagnets is reduced and power consumption is reduced.

Abstract: A wire dot printing head includes armatures each of which is coupled to a printing wire, a felt guide for reducing the friction between the printing wires and a printing wire guide, a residual sheet disposed over a magnetic core frame, a biasing leaf spring, and a oil leakage preventing member. Such member is disposed over the armatures to intercept oil flowing from the felt guide. An erroneous dot printing operation due to the arms of the leaf spring sticking to the residual sheet is prevented.

Abstract: In a method of fabricating a biasing plate spring for a wire dot print head having an annular part and a plurality of projections extending radially inward from the inner periphery of the annular part, a biasing plate spring intermediate product having two of the projections substantially opposite to each other and connected by an arm, is first formed. The intermediate product is then barrel-polished, and then the arm is removed by cutting. Because of the arm, entry of one intermediate product into the gap between adjacent projections of another intermediate product is prevented, and damage to the intermediate product is thereby avoided.

Abstract: A wire-type print head comprises an armature to which a rear end of a printing wire is fixed, a core having its forward end adjacent to a rear surface of the armature, a leaf spring having a first end fixed near a permanent magnet and a second end fixed to the armature, and an auxiliary core positioned between the permanent magnet and the core, and having a forward end adjacent to the rear surface of the armature. An electric current is made to flow through a coil wound on the core for generating a magnetic flux through the core in a direction to cancel the magnetic flux due to the permanent magnet. When the coil is not energized the armature is attracted toward the core to resiliently deform the leaf spring. When the coil is energized the armature is released and moved forward by the action of the leaf spring. The rear surface of the armature is kept in contact with the front end of the auxiliary core so that the front end of the auxiliary core forms a fulcrum point for swinging of the armature.

Abstract: A wire-type print head comprises an armature to which a rear end of a printing wire is fixed, a core having its forward end adjacent to a rear surface of the armature, a leaf spring having a first end fixed near a permanent magnet and a second end fixed to the armature, and an auxiliary core positioned between the permanent magnet and the core, and having a forward end adjacent to the rear surface of the armature. An electric current is made to flow through a coil wound on the core for generating a magnetic flux through the core in a direction to cancel the magnetic flux due to the permanent magnet. When the coil is not energized the armature is attracted toward the core to resiliently deform the leaf spring. When the coil is energized the armature is released and moved forward by the action of the leaf spring. The rear surface of the armature is kept in contact with the front end of the auxiliary core so that the front end of the auxiliary core forms a fulcrum point for swinging of the armature.