Abstract: An infusion pump includes: a main body unit including a tube attachment unit to which an infusion tube is attachable substantially horizontally; and a door unit that is openable and closable with respect to the main body unit and covers the tube attachment unit in a state of being closed with respect to the main body unit. The tube attachment unit includes: an indwelling portion configured to place the infusion tube on an upper side of the main body unit in a height direction, and a first protruding portion that extends from the indwelling portion toward a lower side in the height direction of the main body unit, and includes a slope in which a degree of protrusion from the main body unit is larger at a position closer to the lower side in the height direction.

Abstract: An infusion pump includes: a displacement sensor including: a groove portion to which an infusion tube is attachable, a detection surface exposed to the groove portion, the displacement sensor being configured to detect a pressure applied to the detection surface, a first mask portion that covers a first end of the detection surface in a width direction of the groove portion, and a second mask portion that covers a second end of the detection surface in the width direction of the groove portion.

Abstract: A method for restoring the head to the track 0 in a disk drive unit which utilizes a stepping motor to position the head, the method comprising positioning the head to a position outside track 0 by exciting the stepping motor; returning the head thereafter toward an inner side to detect a position where the track 0 is found wihin a cycle of an excitation phase of the stepping motor; positioning the head at a position separated from the outer-most track 0 by a preset number of steps; and then controlling a current ratio to effect an excitation on a preset excitation phase, thereby positioning the head to the position over the track 0.

Abstract: A magnetic disk drive device includes a rotatable disk. The disk has at least data tracks and guard band tracks. The data is previously recorded on the data tracks in the reversed magnetization form, whereas no data is recorded on the guard band track. While the magnetic head seeks the data from the tracks, the data is detected at first from the data track. This position where the first data is detected is recognized as a zero track. The magnetic head data seeking is performed based upon this zero track which is electronically detectable.

Abstract: A method of re-correcting the position of a head is used in a disk driving device including a zero track restoring arrangement for electrically detecting the zero track position on a magnetic disk, and including a track counter indicating the track position of the magnetic head. The method is configured to monitor the track number of the track counter and never fails to effect re-correction of the position of the head when the track number is "0" or "1".

Abstract: An information recording disk includes detection regions used to confirm presence or absence of written signals, read/write regions available for signal writing and write-project regions which reject signal writing. Regions where the detection regions and read/write regions overlap each other are originally provided with discriminating signals to distinguish these regions from at least the other regions. The write protect regions are distinguished from the read/write regions, referring to information detected by a head assembly.