Feeding pencil
AssigneeTokiwa Corporation
InventorYoshikazu Tani
Life of this patent
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Abstract
A feeding pencil includes a pipe member, a leading tube, a tubular main body, a movable body, and a holding member. The pipe member is disposed inside the leading tube and loads a drawing material. The movable body extends in an axial direction includes a male screw formed across an entire outer periphery thereof in the axial direction. The holding member holds the movable body. The pipe member includes a female screw on an inner surface thereof. The female screw screws with the male screw. A relative rotation between the leading tube and the main body relatively rotates the pipe member and the holding member and acts a screwing action between the male screw and the female screw. The screwing action moves the movable body forward to extrude the drawing material from the pipe member.
Claims20
A feeding pencil that includes
- a tubular main body;
- a leading tube engaged with the main body to be relatively rotatable;
- at least one pipe member disposed inside the leading tube, the at least one pipe member being configured to load a respective drawing material;
- at least one movable body extending in an axial direction at a rear of the respective drawing material inside the at least one pipe member, the at least one movable body wholly forming a male screw on an outer periphery thereof in the axial direction;
- and
- at least one tubular holding member disposed rearward with respect to the at least one pipe member, the at least one holding member holding the at least one movable body, wherein:
- the at least one pipe member includes a female screw on an inner surface thereof, the female screw being configured to screw with the male screw,
- the at least one holding member has at least one protrusion on an inner surface thereof, the at least one protrusion being brought into abutment with the male screw from outside and engaged with the at least one movable body in the axial direction so as to prevent the at least one movable body from dropping out of the at least one holding member, and
- the leading tube and the main body are relatively rotated in one direction such that the at least one pipe member and the at least one holding member are relatively rotated, and the at least one movable body moves forward by the screwing action caused by the male screw and the female screw such that the drawing material is extruded from the at least one pipe member.
Dependencies are inferred from the claim text.