Abstract: A double-chuck mechanical pencil comprises: a barrel; a barrel cap attached to the barrel; a lead tank axially slidably inserted in the barrel; a back chuck fixedly joined to the front end of the lead tank; a chuck ring loosely fitted on the chucking head of the back chuck; a tubular member disposed so as to surround the front portion of the lead tank; a back elastic member placed in the tubular member so as to bias the lead tank backward; a coupling member combined with the tubular member, and provided in its inner circumference with stopping portions with which the tubular member and the chuck ring come into contact, respectively; a front chuck fixedly joined to the front portion of the coupling member; and a front elastic member interposed between the barrel cap and the coupling member so as to bias the coupling member backward. A rotation prohibitor permits the axial movement of the coupling member and prohibits the rotation of the same relative to the tubular member.

Abstract: A bar extruding implement extrudes a bar, such as a lead, a lipstick or the like, gradually and is capable of automatically ejecting a marginal portion of the bar. A projection formed on a sliding member inserted in an inner tube slides along a helical groove formed in the inner circumference of a barrel to advance the sliding member when a rotational operating head is turned to turn the inner tube in one direction, whereby a bar holder holding a bar is advanced gradually toward the front end of the barrel to extrude the bar from the front end of the barrel. Upon the arrival of the bar holder at a disengaging position, the sliding member is disengaged from the bar holder and advances forward through the bar holder when the inner tube is turned further after the bar holder has arrived at the disengaging position to eject a marginal portion of the bar remaining on the bar holder.

Abstract: A side knock type mechanical pencil including a cylindrical shell having a ferrule; a slide member disposed axially movably within the cylindrical shell; a chuck disposed in front of the slide member, with a chuck ring being loosely fitted on the chuck; a chuck spring for urging the chuck backward; and a side knock mechanism provided in the cylindrical shell, the said side knock mechanism comprising a side knock member provided in the cylindrical shell and the slide member, the slide member being movable axially against the backward bias of the chuck spring and having a slant portion for abutment with the side knock member when the side knock member is depressed radially.

Abstract: A stick-shaped material propelling container is comprised of a tubular body provided with a spiral groove in the inside thereof a guide sleeve inserted into the tubular body that is not movable in an axial direction but rotatable relative to the tubular body, and which is provided with guide grooves extending in the axial direction. A holder for holding stick-shaped material, is provided with projections to engage the spiral groove, so that a stick-shaped material held in the holder can be selectively extended from or retracted into the stick-shaped material propelling container. The stick-shaped material propelling container further includes a slit formed in the axial direction through a side wall portion of the holder where there are no projections.

Abstract: A side knock type mechanical pencil including a cylindrical shell having a ferrule; a slide member disposed axially movably within the cylindrical shell; a chuck disposed in front of the slide member, with a chuck ring being loosely fitted on the chuck; a chuck spring for urging the chuck backward; and a side knock mechanism provided in the cylindrical shell, the side knock mechanism comprising a side knock member provided in the cylindrical shell and the slide member, the slide member being movable axially against the backward bias of the chuck spring and having a slant portion for abutment with the side knock member when the side knock member is depressed radially.

Abstract: A lead dispensing storage container that can be opened or closed by a single hand. The container body has a lead case formed therein, and a lead outlet allowing release of leads one by one. A gate member mounted in the container body can be moved to open or close lead paths between the lead case and lead outlet. An elastic arm portion forces the gate member to move in direction to close the lead paths. The number of parts is reduced, and supplying leads can be made easier by a case that has a lead supply opening projecting from the tip thereof. A leading end of the case has an inclined slope toward the lead supply opening therein, and a chuck containing leads having a knocking portion that is pressed into the case so that it can be opened by the knocking portion being pushed to press an opening actuator toward the inclined slope or is closed by an elastic force as the opening actuator is released.

Abstract: A lead dispensing storage container that can be opened or closed by a single hand. The container body has a lead case formed therein, and a lead outlet allowing release of leads one by one. A gate member mounted in the container body can be moved to open or close lead paths between the lead case and lead outlet. An elastic arm portion forces the gate member to move in direction to close the lead paths. The number of parts is reduced, and supplying leads can be made easier by a case that has a lead supply opening projecting from the tip thereof. A leading end of the case has an inclined slope toward the lead supply opening therein, and a chuck containing leads having a knocking portion that is pressed into the case so that it can be opened by the knocking portion being pushed to press an opening actuator toward the inclined slope or is closed by an elastic force as the opening actuator is released.

Abstract: A combined writing tool comprises a cylindrical casing; a push button extended from the top end of said cylindrical casing by force of a spring; a plurality of writing cartridges arranged in the casing and adapted to be alternatively extended from the bottom end of the casing through a small aperture formed therein; and a cam arranged in the casing and adapted to cause a tip of either one of the writing cartridges to be alternatively extended from and retracted in the casing through the small aperture in response to the pushing operation of the push button. The combined writing tool makes it possible to extend or retract either one of the writing cartridges from or into the casing through the small aperture only by a pushing operation of the push button. Thus easy operation can be obtained and unwanted extension of the writing cartridge can be prevented.

Abstract: A side knock type mechanical pencil including a cylindrical shell having a ferrule; a slide member disposed axially movably within the cylindrical shell; a chuck disposed in front of the slide member, with a chuck ring being loosely fitted on the chuck; a chuck spring for urging the chuck backward; and a side knock mechanism provided in the cylindrical shell, the said side knock mechanism comprising a side knock member provided in the cylindrical shell and the slide member, the slide member being movable axially against the backward bias of the chuck spring and having a slant portion for abutment with the side knock member when the side knock member is depressed radially.

Abstract: This invention is to a writing tool such as mechanical pencil or a ballpoint pen in which a writing shaft having a head member is inserted in an outer sleeve in such a manner that the head member projects from the outer sleeve. A stair or step and a spiral groove are provided on the forward inner surface and the rearward inner surface of a tubular cap, respectively, with an inside diameter of the rear part of the spiral groove being larger. A bearing part is brought into contact with a lead tank provided inside a forward art of the tubular part so that the forward part of the outer sleeve is movable in the axial direction and is locked in the turning direction against a rearward inner surface of the outer sleeve. The rearward part of the tubular body is provided with a slit, holding pieces of a stick-shaped object holder slidably inserted in said slit. A stick-shaped object is held by the holding pieces, and the projection is provided on each holder engaged with the spiral groove of the tubular cap.

Abstract: This invention is to a writing tool such as mechanical pencil or a ballpoint pen in which a writing shaft having a head member is inserted in an outer sleeve in such a manner that the head member projects from the outer sleeve. A stair or step and a spiral groove are provided on the forward inner surface and the rearward inner surface of a tubular cap, respectively, with an inside diameter of the rear part of the spiral groove being larger. A bearing part is brought into contact with a lead tank provided inside a forward art of the tubular part so that the forward part of the outer sleeve is movable in the axial direction and is locked in the turning direction against a rearward inner surface of the outer sleeve. The rearward part of the tubular body is provided with a slit, holding pieces of a stick-shaped object holder slidably inserted in said slit. A stick-shaped object is held by the holding pieces, and the projection is provided on each holder engaged with the spiral groove of the tubular cap.

Abstract: A stick-shaped material propelling container is comprised of a tubular body provided with a spiral groove in the inside thereof, a guide sleeve inserted into the tubular body that is not movable in an axial direction, but rotatable relative to the tubular body, and which is provided with guide grooves extending in the axial direction. A holder for holding stick-shaped material, is provided with projections to engage the spiral groove, so that a stick-shaped material held in the holder can be selectively extended from or retracted into the stick-shaped material propelling container. The stick-shaped material propelling container further includes a slit formed in the axial direction through a side wall portion of the holder where there are no projections.

Abstract: A stick-shaped material propelling device is comprised of a first tubular body and a spiral shaft inserted in the first tubular body. The spiral shaft has a spiral groove on the circumference of spiral shaft and an integral guide portion at a rear portion of the spiral shaft. The guide portion engages an inside portion of the first tubular body so that the guide portion is unturnable, but is movable in the axial direction relative to the first tubular body. A holder for holding a stick-shaped material is provided at a front portion of the spiral shaft. A second tubular body is turnably mounted on the first tubular body. The second tubular body has a projection on the inside of a rear portion of second tubular body. The spiral shaft and the holder are inserted into the second tubular body so as to be able to slide in the second tubular body with the projection engaging the spiral groove. At least one slit is formed around the projection on the second tubular body or in an end portion of the spiral shaft.

Abstract: A stick-shaped piece drive container capable of preventing a stick-shaped piece from drying out by evaporating moisture is provided. A stick-shaped piece supplying cassette capable of supplying a stick-shaped piece to the stick-shaped piece drive container in a simple way is also provided. The stick-shaped piece drive container is comprised of an outer cylinder and a screw shaft having a helical groove provided on a circumference thereof and a non-rotatable connecting portion provided on a front end thereof, inserted in the outer cylinder movable in an axial direction thereof. An inner cylinder has a projection provided on a rear inside thereof that fits the helical groove, and is immovably mounted in the outer cylinder but is rotatable in an axial direction thereof to extend out of it forwardly. A stick-shaped piece holder is detachably coupled with the connecting portion of the screw shaft and slidably provided in the inner cylinder for holding a stick-shaped piece.

Abstract: A lead dispensing storage container that can be opened or closed by a single hand. The container body has a lead case formed therein, and a lead outlet allowing release of leads one by one. A gate member mounted in the container body can be moved to open or close lead paths between the lead case and lead outlet. An elastic arm portion forces the gate member to move in direction to close the lead paths. The number of parts is reduced, and supplying leads can be made easier by a case that has a lead supply opening projecting from the tip thereof. A leading end of the case has an inclined slope toward the lead supply opening therein, and a chuck containing leads having a knocking portion that is pressed into the case so that it can be opened by the knocking portion being pushed to press an opening actuator toward the inclined slope or is closed by an elastic force as the opening actuator is released.

Abstract: A slider mechanism of a mechanical pencil is capable of fixing its lead guide at positions of its projection and withdrawal. The slider mechanism comprises a slider fixing the lead guide, the slider being provided with a sliding member sliding on the internal peripheral surface of a point member, a projection provided on the rear end of the external peripheral surface of the sliding member, and grooves provided on the internal peripheral surface of the point member, the grooves being engaged with the projection at positions of the lead guide's projection from and withdrawal into an aperture on the tip of the point member. The projecting position of the lead guide in a writing state and the withdrawal position in a housing state are securely maintained.

Abstract: This invention is to a writing tool such as mechanical pencil or a ballpoint pen in which a writing shaft having a head member is inserted in an outer sleeve in such a manner that the head member projects from the outer sleeve. A stair or step and a spiral groove are provided on the forward inner surface and the rearward inner surface of a tubular cap, respectively, with an inside diameter of the rear part of the spiral groove being larger. A bearing part is brought into contact with a lead tank provided inside a forward art of the tubular part so that the forward part of the outer sleeve is movable in the axial direction and is locked in the turning direction against a rearward inner surface of the outer sleeve. The rearward part of the tubular body is provided with a slit, holding pieces of a stick-shaped object holder slidably inserted in said slit. A stick-shaped object is held by the holding pieces, and the projection is provided on each holder engaged with the spiral groove of the tubular cap.

Abstract: A twin type stick-shaped material extending container comprised of a base sleeve having first and second concave inner end portions at both ends of the base sleeve. First and second rotary guide sleeves are inserted into the concave inner end portions of the base sleeve. First and second traveling bodies have first and second stick-shaped material receiving bases respectively, slidably fitting in first and second rotary guide sleeves. The first traveling body is inserted in the second traveling body and inserted in the base sleeve. First and second spiral threaded grooves are formed on circumferences of the first and second traveling bodies into which first and second raised portions engage. First and second rotation prevention means regulate the direction of rotation of the first rotary guide sleeve provided on the first and second traveling bodies. The first and second rotary guide sleeves are capped with first and second inner caps respectively detachably attached to outer caps.

Abstract: This invention is to a writing tool such as mechanical pencil or a ballpoint pen in which a writing shaft having a head member is inserted in an outer sleeve in such a manner that the head member projects from the outer sleeve. A stair or step and a spiral groove are provided on the forward inner surface and the rearward inner surface of a tubular cap, respectively, with an inside diameter of the rear part of the spiral groove being larger. A bearing part is brought into contact with a lead tank provided inside a forward art of the tubular part so that the forward part of the outer sleeve is movable in the axial direction and is locked in the turning direction against a rearward inner surface of the outer sleeve. The rearward part of the tubular body is provided with a slit, holding pieces of a stick-shaped object holder slidably inserted in said slit. A stick-shaped object is held by the holding pieces, and the projection is provided on each holder engaged with the spiral groove of the tubular cap.

Abstract: This invention is to a writing tool such as mechanical pencil or a ballpoint pen in which a writing shaft having a head member is inserted in an outer sleeve in such a manner that the head member projects from the outer sleeve. A stair or step and a spiral groove are provided on the forward inner surface and the rearward inner surface of a tubular cap, respectively, with an inside diameter of the rear part of the spiral groove being larger. A bearing part is brought into contact with a lead tank provided inside a forward art of the tubular part so that the forward part of the outer sleeve is movable in the axial direction and is locked in the turning direction against a rearward inner surface of the outer sleeve. The rearward part of the tubular body is provided with a slit, holding pieces of a stick-shaped object holder slidably inserted in said slit. A stick-shaped object is held by the holding pieces, and the projection is provided on each holder engaged with the spiral groove of the tubular cap.