Abstract: A writing instrument is provided in which assembling thereof can be finished by inserting a writing medium advancing mechanism into an outer barrel from the rear end side thereof, in which the outer appearance thereof is not injured and the assembling thereof is easy.A lead advancing mechanism 10 has a chuck 13 connected with a front portion of a front tank member 12a, a chuck ring 14 surrounding an outer surface of the chuck 13, a sleeve 15 disposed so as to be able to contact a rear end of the chuck ring 14, a chuck spring 16 interposed between the sleeve 15 and a front end of the front tank member 12b to force the front tank member 12b backward. The sleeve 15 is formed with engaging projections 15a and with slits 15b each of which surrounds three sides of each engaging projection 15a, respectively, in such a manner that a resilient engaging means 15c is constructed, which can be resilient in radial directions of the sleeve.

Abstract: A dispenser for selectively extending and retracting a substantially stick-shaped object, comprising an outer tubular casing having an opened end, a closed end, a first chamber adjacent the opened end, and a second chamber adjacent the closed end for storing at least one spare stick-shaped object therein, the first and second chambers communicating with each other, a dispenser structure removably received in the first chamber, and a retaining mechanism for retaining the dispenser structure in the first chamber. A writing instrument of side-knock-type or side-slide-type provided with a dispenser for selectively extending and retracting a substantially stick-shaped object is also disclosed.

Abstract: The present invention provides writing instruments having a mechanism for extending and retracting a writing tip and advancing a lead by rotational operation. The writing instrument is comprised of a front tubular member (1); a front inner tubular member (2) disposed within the front tubular member (1); a refill (3) inserted into the front inner tubular member (2); and a driver (10) mounted in the front tubular member (1) and the front inner tubular member (2). The driver (10) is allowed to rotate but not be axial displaced relative to the front tubular member (1) and the front inner tubular member (2). A rear tubular member (5) is detachably connected to the driver (10) so as not to allow rotation relative to the driver (10). A rear inner tubular member (4) is inserted in the driver (10). The rear inner tubular member (4) and the driver (10) interengage with each other by engagement between at least one axial groove (11) and corresponding projections (12).

Abstract: A dispenser for selectively extending and retracting a substantially stick-shaped object, comprising an outer tubular casing having an opened end, a closed end, a first chamber adjacent the opened end, and a second chamber adjacent the closed end for storing at least one spare stick-shaped object therein, the first and second chambers communicating with each other, a dispenser structure removably received in the first chamber, and a retaining mechanism for retaining the dispenser structure in the first chamber. A writing instrument of side-knock-type or side-slide-type provided with a dispenser for selectively extending and retracting a substantially stick-shaped object is also disclosed.

Abstract: A mechanical pencil providing a cushioning action by the action of a sleeve disposed inside of an outer barrel. The mechanical pencil comprises an outer barrel, and a lead pipe disposed inside the outer barrel. The lead pipe has a chuck mounted in the end thereof. The pencil further comprises a chuck ring mounted on the outside of the chuck, a sleeve contacting a rear end of the chuck ring slidable relative to the outer barrel, and a spring interposed between the sleeve and the lead pipe. The sleeve has a plurality of flexible pieces that spread outwardly in a radial direction. A part of each flexible piece 24a is inserted into a stopper hole formed on an inner wall of the outer barrel. An inclined portion contacting the rear end of the stopper hole is formed on an outer surface of each of the flexible pieces.

Abstract: The present invention provides writing instruments having a mechanism for extending and retracting a writing tip and advancing a lead by rotational operation. The writing instrument is comprised of a front tubular member (1); a front inner tubular member (2) disposed within the front tubular member (1); a refill (3) inserted into the front inner tubular member (2); and a driver (10) mounted in the front tubular member (1) and the front inner tubular member (2). The driver (10 ) is allowed to rotate but not be axial displaced relative to the front tubular member (1) and the front inner tubular member (2). A rear tubular member (5) is detachably connected to the driver (10) so as not to allow rotation relative to the driver (10). A rear inner tubular member (4) is inserted in the driver (10). The rear inner tubular member (4) and the driver (10) interengage with each other by engagement between at least one axial groove (11) and corresponding projections (12).

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: 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 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: The present invention provides writing instruments having a mechanism for extending and retracting a writing tip and advancing a lead by rotational operation. The writing instrument is comprised of a front tubular member (1); a front inner tubular member (2) disposed within the front tubular member (1); a refill (3) inserted into the front inner tubular member (2); and a driver (10) mounted in the front tubular member (1) and the front inner tubular member (2). The driver (10) is allowed to rotate but not be axial displaced relative to the front tubular member (1) and the front inner tubular member (2). A rear tubular member (5) is detachably connected to the driver (10) so as not to allow rotation relative to the driver (10). A rear inner tubular member (4) is inserted in the driver (10). The rear inner tubular member (4) and the driver (10) interengage with each other by engagement between at least one axial groove (11) and corresponding projections (12).

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 writing instrument including; a front casing having a throughhole extending longitudinally therethrough; a refill extending in the throughhole; and a cam body located in the throughhole. The cam body has at least one cam groove formed on the inner periphery thereof, at least one cam surface provided at the end thereof, and a shoulder portion connecting the cam grooves. A rotating cam engages the edge of the cam grooves and receives an end of the refill. A cam bar having at least one projection is adapted to be inserted in the cam grooves so as to slide along the cam grooves to a shoulder portion. The cam bar is able to push the rotating cam forwardly to cause the rotating cam to rotate. An elastic body pushes the refill toward the rotating cam. rear casing is aligned with the front casing and is fixed at the cam bar.

Abstract: A stick-shaped material propelling container comprised of a flat-shaped outer sleeve, a chuck in the form of tweezers having a pair of opposing flat arms inserted into the outer sleeve and having a base in the rear portion thereof, and a chuck ring connected to the front portion of the outer sleeve and positioned around the front portion of the chuck. A through hole is formed through the base of the chuck in a direction perpendicular to a longitudinal direction thereof, and a retaining portion is formed on an inner surface of the outer sleeve. An elastic member is mounted between the rear inner surface of the through hole and the retaining portion of the chuck.

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: A rotary-cam ball-point pen having an outer sleeve, a rotary-cam mechanism comprised of a cam body provided on the inside of the outer sleeve, a rotary-cam engaging the cam body, and a cam bar engaging the rotary-cam, and a refill. The rear portion of the refill is loaded backward by an elastic body inserted into the rotary-cam. The cam bar has a structure with flexibility in which the cam bar can be distorted inward by applying a radial force. Since the cam bar is inserted into the outer sleeve from the rear side of the outer sleeve, it is possible to form a clip of an integral part of the cam bar, or a decoration having dimensions larger than the outside diameter, or a knocking 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: 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 writing tool comprised of a head member, a refill, a return spring, and a cam mechanism for projecting the top of the refill out of or retracting it into the head member comprised of cam body, a rotation cam, and cam bar. The cam body is attached to the head member, and the rotation cam is located near the head member. Since the cam mechanism is located near the head member, the length of the writing tools may be short, therefore compact small writing tools can be formed.