Abstract: A toggle type fastener to releaseably couple a fixed object and a movable object to each other includes a pedestal that is structured to be fixed to the movable object, a toggle lever pivotally coupled to the pedestal, a latching arm pivotally coupled to the toggle lever, a looseness prevention element that prevents movement of the movable object. The looseness prevention element is attached to the latching arm and sized to be hooked to a hooked member that is structured to be fixed to the fixed object.

Abstract: Provided is a door opening and closing system capable of returning to a return state where a catch and a retractable arm are engaged with each other even if the retractable arm is closed completely as a result of incorrect usage such as a prank. A catch has a catch base which is mounted on either one of the door and a frame and a catch shaft which is installed in the catch base slidable in an axial direction and engaged with a retractable arm. At a tip end of the catch shaft, a small-diameter part is provided as a step part. The step part of the catch shaft and the retractable arm are engaged with each other in a state where the retractable arm is further rotated in the closing direction after a main body part of the catch shaft and the retractable arm are engaged with each other.

Abstract: Provided is a door opening and closing device wherein the device width can be made small and wherein the movement of a retraction arm can be stabilized. In a body case (102) which is slender and extends in one direction, there is provided an arm block (121) for a retraction arm (104) which rotates from the open state to the closed state. On one side of the body case (102), there is provided a first slider (134) which, being interlocked with the rotation of the arm block (121), makes linear movements in one direction. In the body case (102), there is provided an arm shaft (105) which serves as the center of rotation of the arm block (121). A second slider (131) which, being interlocked with the rotation of the arm block (121), makes linear movements in one direction, is provided opposite the first slider (134), in such a way as to have the arm shaft (105) held between the first and second sliders (134, 131).

Abstract: Provided is a door opening and closing system capable of returning to a return state where a catch and a retractable arm are engaged with each other even if the retractable arm is closed completely as a result of incorrect usage such as a prank. A catch has a catch base which is mounted on either one of the door and a frame and a catch shaft which is installed in the catch base slidable in an axial direction and engaged with a retractable arm. At a tip end of the catch shaft, a small-diameter part is provided as a step part. The step part of the catch shaft and the retractable arm are engaged with each other in a state where the retractable arm is further rotated in the closing direction after a main body part of the catch shaft and the retractable arm are engaged with each other.

Abstract: Provided is a damper position adjusting device capable of adjusting a damping force over a wide adjustment range and facilitating the adjustment work of the position of the damper. The damper position adjusting device has a damper base 38 for storing a plurality of dampers 32 in parallel to each other, each of the dampers 32 having a rod 32a that moves relative to a cylinder 32b; and a damper adjusting shaft 40 which is mounted rotatable in the damper base 38 and has a side wall 44 in contact with ends of the dampers 32 in a moving direction. By rotating the damper adjusting shaft 40, the side wall of the damper adjusting shaft 40 pushes at least one of the dampers 32 out in the moving direction of the rod 32a to change a position of the damper 32 relative to the damper base.

Abstract: A telescopic stay comprises a stay body including an inner arm and an outer arm into which the inner arm is slidably fitted. In order to lock the inner and outer arms in a pre-determined superposed position, a locking rod engages a locking hole in the inner arm by a locking spring disposed in a guide member attached onto the outer arm, but the guide member has a base portion passing through a flat board of the outer arm and a locking spring urges the guide member so that the base portion is forced against the inner face of the flat board portion. This requires no specific operation for securing the guide member and therefore the telescopic stay can be assembled with a reduced number of parts.

Abstract: A hazardous substance treatment agent has a retainer and a transition metal oxide. The retainer has the specificity of retaining only a specific hazardous substance, such as a virus, a bacterium or a toxin, that has become mixed in or has the possibility of becoming mixed in a treatment subject, such as blood, that is in at least either a liquid or gaseous phase. By a photocatalytic action, the transition metal oxide inactivates said hazardous substance retained by the retainer.

Abstract: A telescopic stay comprises a stay body (16) including an inner arm (1w2) and an outer arm (14) into which the inner arm '(12) is slidably fitted. In order to lock the inner and outer arms (12, 14) in a predetermined superposed position, a locking rod (54) is engaged with a locking hole (56) provided in the inner arm by a locking spring 52 disposed in a guide member (50) attached onto the outer arm (14), but the guide member (50) has a base portion (62) provided on a cylindrical portion (60) passing through a flat board portion (14AW) of the outer arm (14) and a locking spring (52) urges the guide member (50) so that the base portion (62) of the guide member (50) is forced against the inner face of the flat board portion (14AW). In this manner, there is required no specific operation for securing the guide member (50) guiding the locking rod (54) of the telescopic stay and therefore the telescopic stay can be assembled with a reduced number of parts.

Abstract: The present invention relates to a material that is able to selectively inactivate a specific biologically harmful substance through photocatalysis, and uses thereof.

Abstract: A hazardous substance treatment agent has a retainer and a transition metal oxide. The retainer has the specificity of retaining only a specific hazardous substance, such as a virus, a bacterium or a toxin, that has become mixed in or has the possibility of becoming mixed in a treatment subject, such as blood, that is in at least either a liquid or gaseous phase. By a photocatalytic action, the transition metal oxide inactivates said hazardous substance retained by the retainer.

Abstract: A magnetic tape cassette includes means comprising a translucent, rough surface formed on the upper flange. The rough surface has a roughness on a scale of 5 to 20 .mu.m, and preferably 5 to 10 .mu.m.

Abstract: An information record disc for use in a magnetic recording and reproducing apparatus to provide a plurality of still pictures in a plurality of spiral tracks on a magnetic disc thereof, includes an annular magnetic plate having an aperture therein; and a cylindrical central core made of plastic and formed with the magnetic plate by an outsert molding process in which the central core includes an upper section extending above the magnetic plate, a lower section extending below the magnetic plate and a connecting section connecting the upper and lower sections through the aperture, the upper and lower sections being offset from the aperture, so that an integral structure is provided with the central core and the magnetic plate, and with the magnetic plate thereby having an outwardly extending radial flange which extends radially outward from the central core and to which the magnetic disc is secured and an inwardly extending radial section which extends inwardly of the central core and which is attracted by a m