JPS63191079U - - Google Patents

Description

[Brief explanation of the drawing]

The figures show an embodiment of the present invention. Fig. 1 is a longitudinal sectional view with the axial length extended, Fig. 2 is a longitudinal sectional view with the axial length shortened, and Fig. 3 is a longitudinal sectional view of the cam cylinder. The developed plan view and FIG. 4 are half-longitudinal cross-sectional views of the cursive writing. 1... Cap, 2... Rotation stop ring A, 3... Stop ring, 4... Tip shaft, 5... Clip receiving ring, 6... Crown, 7... Clip, 8... Mounting ring part, 9... Rotation stop ring B, 10... Decorative ring, 11... Rear shaft, 12... Chuck mechanism, 13
...Tube, 14... Core case, 15... Inner edge of opening, 16... Step, 17... Cursive, 18...
... Rear end cylinder part, 19 ... Followed cam protrusion A, 20 ...
Inner step part, 21... Coil spring A, 22... Cursive holder, 23... Followed cam protrusion B, 24...
Tsuba, 25...Eraser, 26...Eraser stopper, 2
7... Knot cover, 28... Front end cylinder section, 29...
...Coil spring B, 30...Eraser holder, 31
... Vertical groove part, 32 ... Diagonal groove part A, 33 ... Horizontal groove part A, 34 ... Diagonal groove part B, 35 ... Horizontal groove part B, 36
...Cam guide groove, 37...Coil spring C, 38
...Cam tube.

Claims (1)

[Scope of utility model registration request] A front shaft, a rear shaft that is movable in the axial direction with respect to the front shaft and rotatable in the circumferential direction, and a rear shaft that is housed inside the front shaft so as to be movable in the axial direction and whose rear end portion moves in the axial direction. It has a writing body whose lead is drawn out and a driven cam protrusion A, which fits into the rear end of the writing body and is pushed backward by a spring, and is further movable in the axial direction with respect to the tip shaft and rotates in the circumferential direction. It has a writing body holder that is assembled in a fixed manner and a driven cam protrusion B, which is movable in the axial direction with respect to the rear shaft, and is elastically pushed forward by a spring so that it can freely move in the axial direction with respect to the writing body holder and in the circumferential direction. An eraser holder assembled in a non-rotatable manner, a longitudinal groove in the axial direction, a diagonal groove A extending obliquely forward from its front end, a lateral groove A extending substantially perpendicular to the axial direction from its tip, and a rear longitudinal groove. The cam guide groove has a cam guide groove consisting of a diagonal groove B extending diagonally backward from the end and a lateral groove B extending substantially perpendicular to the axial direction from the tip. It is fitted into the guide groove and assembled to the writing holder and eraser holder so that it can move freely in the axial direction and freely rotate in the circumferential direction, and it can move freely in the axial direction with respect to the rear shaft, but the rotation is integrated. The cam barrel is assembled in such a manner that it is pushed backward by a spring, and the driven cam protrusion A of the writing holder and the driven cam protrusion B of the eraser holder are positioned in the vertical groove of the guide groove of the cam barrel. The front shaft and the rear shaft are relatively movable back and forth, and the tip of the cursive writing brush and the notch provided at the rear end of the eraser holder both maintain a state recessed into the shaft, and the rear shaft is relative to the front shaft. When the rear shaft rotates with respect to the front shaft in the backward state, the driven cam protrusion A and the driven cam protrusion B are guided by the diagonal grooves A and B, respectively, and are positioned and locked in the lateral grooves A and B. A retractable sharp pencil characterized in that the dimensions are set so that both the tip and the notch protrude outside the axis when the brush is in the state.