Abstract: In a finger attaching instrument turnably coupled to a finger attaching tool attached between a second joint and a root joint of an index finger and used while alternatively changing it in a writing posture and a holding posture, the finger attaching writing instrument having excellent functionality is provided. The tail portion of the writing instrument is provided to be short so as not to protrude from the root joint of the index finger in the writing posture. When changing the posture, the tail portion is pressed with the thumb to turn it in the opposite direction, and then it is used. In the holding posture, the tail portion is closer to the second joint of the index finger, and the shaft body is placed on the web between the index finger and the thumb.

Abstract: The part for mounting on the finger is provided so as to be integral with a linking member; by means of building-in, folding, inserting and removing, and winding, the holder is made deformable to a carried condition when not in use; a necessary shortest dimension of the writing tool in the written condition is divided into at least two sections, i.e., an axis body 1 and a cap 2; and then, the axis body 1 and the cap 2 are overlapped with each other by means of folding or storing to thereby shorten the writing tool in a retained condition, and the writing tool in the written condition is reversibly movable in a predetermined range to thereby make an angle of the writing tool adjustable.

Abstract: The part for mounting on the finger is provided so as to be integral with a linking member; by means of building-in, folding, inserting and removing, and winding, the holder is made deformable to a carried condition when not in use; a necessary shortest dimension of the writing tool in the written condition is divided into at least two sections, i.e., an axis body 1 and a cap 2; and then, the axis body 1 and the cap 2 are overlapped with each other by means of folding or storing to thereby shorten the writing tool in a retained condition, and the writing tool in the written condition is reversibly movable in a predetermined range to thereby make an angle of the writing tool adjustable.

Abstract: Provided is a novel technology for determining the cause of a faulty insertion of a block body into a plug blade insertion hole, and for solving that problem fundamentally. The externally extending shapes of a ceiling plate and a rotary frame are made circular by using the novel technology as the core technology, to thereby make improvements including the integration of a locking function and a power supply connection function. A selection is made which of a rotary frame (4) or a ceiling plate (22) is used as a reference, and a rotary track is set for the selected reference with the intersection of a longitudinal center line and a lateral center line used as the center of a circle. A new rotary track is provided for the other with the intersection of a lateral center line before rotation and a lateral center line after rotation used as the center of a circle in a state where the longitudinal center line is always aligned with the longitudinal center line of the selected reference.

Abstract: Provided is a novel technology for determining the cause of a faulty insertion of a block body into a plug blade insertion hole, and for solving that problem fundamentally. The externally extending shapes of a ceiling plate and a rotary frame are made circular by using the novel technology as the core technology, to thereby make improvements including the integration of a locking function and a power supply connection function. A selection is made which of a rotary frame (4) or a ceiling plate (22) is used as a reference, and a rotary track is set for the selected reference with the intersection of a longitudinal center line and a lateral center line used as the center of a circle. A new rotary track is provided for the other with the intersection of a lateral center line before rotation and a lateral center line after rotation used as the center of a circle in a state where the longitudinal center line is always aligned with the longitudinal center line of the selected reference.