Abstract: A bolt-action pen body is adapted as a universal receiver of an ink cartridge refill. The bolt action pen includes a hollow cylindrical pen body. A tip is removably coupled with an outer barrel at the distal end of the pen body. A refill cartridge is selectively extensible and retractable from the tip by a lever action movement of a bolt and a bolt carrier within a slot defined through a sidewall of the pen body. The bolt action pen provides for universal adjustment to various shapes of refill cartridges. An inner barrel is coupled with the pen body and is configured to adjust the pen body to a longitudinal length of the refill cartridge. A collet carried within the tip is configured for compressive adjustment to a diameter of writing end of the refill cartridge.

Abstract: A mechanical pencil includes a writing lead, a chuck that chucks the writing lead and feeds the writing lead forward, and a shaft tube for housing the writing lead and the chuck. When a click operation for feeding the chuck forward is performed, a jet stream flowing forward is generated inside the shaft tube.

Abstract: A side-knock type mechanical pencil comprising a body with a side-mounted knock button coupled to the body of the mechanical pencil and adapted to slidingly engage with a lead tube with a frustoconical hub for translating the motion of the knock button actuation to linear extension of the lead.

Abstract: A mechanical pencil includes a barrel extending in a longitudinal direction, a lead-propelling mechanism, a lead reservoir, a side button, and an eraser-propelling mechanism having a helical cam. The lead-propelling mechanism, the lead reservoir, the eraser-propelling mechanism, and the side button are at least partly housed inside the barrel. The lead-propelling mechanism, the lead reservoir, and the eraser-propelling mechanism are prevented from rotating about the longitudinal direction relative to one another and relative to the side button, and the side button is prevented from rotating about the longitudinal direction relative to the barrel.

Abstract: A side-knock type mechanical pencil comprising a body with a side-mounted knock button coupled to the body of the mechanical pencil and adapted to slidingly engage with a lead tube with a frustoconical hub for translating the motion of the knock button actuation to linear extension of the lead.

Abstract: A mechanical pencil unit is provided which includes: a holding tube; a holder which is inserted into a front side opening portion of the holding tube and which protrudes forward from a front end of the holding tube, and moreover which is supported so as to be back and forth movable relative to the holding tube; a pencil lead delivering mechanism which delivers forward a pencil lead x inserted into the holder; and a movement direction conversion mechanism which causes the holder to go forward relative to the holding tube and the pencil lead x by using a force applied in a radial direction from the pencil lead x to the holder, wherein the pencil lead delivering mechanism is provided at a position further toward a rearward side than the holder and the movement direction conversion mechanism.

Abstract: The present invention is a chuck body (13) provided with: a hollow, substantially cylindrical fastener (11) having a tapered inner surface (13) in which the diameter of the hole gradually changes along the axial direction; and a chuck (21) having a divided end part (23) divided into two or three, the divided end part (23) having a tapered outer surface (24) that can enter or exit from the fastener (11) and that comes into contact with the tapered inner surface (13) of the fastener (11) when entering the fastener (11). When the divided end part (23) of the chuck (21) closes in the fastener (11) and holds the core (10), the angle of the tapered outer surface (24) of the chuck (21) relative to the center axis line of the chuck (21) is substantially identical to the angle of the tapered inner surface (13) of the fastener (11).

Abstract: To protect a writing core, a writing utensil includes: a shaft tube; a holder which is inserted through a front opening of a shaft tube and protrudes forward from a front end of the shaft tube; a writing core which is inserted through the holder while coming into contact with an inner peripheral surface of the holder and is supported by the shaft tube so as to protrude forward from a front end of the holder; and a movement direction conversion mechanism which is provided between the shaft tube and the holder and moves the holder forward relative to the shaft tube and the writing core by a force applied to the holder in the shaft tube outward radial direction.

Abstract: Disclosed herein are personal care compositions having at least one oligopeptide self-assembled into nanofibers or macrostructures, wherein the oligopeptide is 2-20 amino acids in length, and wherein the oligopeptide has at least one 0- to 10-amino-acid block of hydrophobic amino acids alternating with at least one 1- to 10-amino-acid block of hydrophilic amino acid residues. The composition may further include a dermatologically acceptable carrier and at least one cosmetic skin care agent.

Abstract: Cam faces 24a and 24b are continuously formed in a circle on upper and lower faces which are perpendicular to an axial direction of a rotatable cam 24 which constitutes a rotational drive mechanism 21. Elastic members 23b are formed integrally with a holder member 23 for rotatably supporting the rotatable cam 24 to extend in the axial direction, and the first fixed cam and second fixed cam 23c and 23d having a small number of cam faces at butts and tips of the elastic members are arranged to face each other via the upper and lower cam faces 24a and 24b of the rotatable cam 24. The rotatable cam 24 is retreated and moved forward in the axial direction by writing pressure applied to a writing lead to be rotationally driven in one direction and rotational motion of the rotatable cam 24 is transmitted to the writing lead.

Abstract: A mechanical pencil has a main body inserted into a tubular main body cover to undergo forward and rearward movement and rotational movement within the main body cover. The main body feeds a lead and holds the lead during writing. A gear mechanism incrementally rotates the main body based on the presence or absence of writing pressure occurring during writing to thereby incrementally rotate the lead. Protection collars are rotatably mounted on the outer periphery of the main body at locations where the main body is exposed from the main body cover. The protection collars rotatably idle on the main body to prevent a person from gripping and rotating the main body thereby preventing damage to the gear mechanism.

Abstract: A mechanical pencil is provided which does not require operation of removing or re-fitting a cap but allows writing immediately after supplying a writing lead. A lead fixing chuck 4 which is moved back and forth in conjunction with knock operation of a knock bar 22 to release and grip the writing lead L, and a holder chuck 9 which is provided in front of the lead fixing chuck and holds the writing lead frictionally are arranged such that the writing lead can be gradually inched out by repeating the knock operation. An open/close mechanism having an open/close valve 27 is provided in which a writing lead feeding unit is opened in a situation where the grip of the lead fixing chuck 4 on the writing lead is released by the knock operation, and the holder chuck 9 is disposed proximate to a writing lead outlet.

Abstract: A mechanical pencil comprises a shaft cylinder (1), a lead pipe (3) axially movably inserted into the shaft cylinder (1) and biased in a retract direction, and a chuck body (45) provided within the shaft cylinder (1) in front of the lead pipe (3) for releasably griping a writing lead (S). The lead pipe (3) and the chuck body (45) are separated, the lead pipe (3) is inserted into the shaft cylinder (1) with axial movement thereof being permitted and circumferential rotation thereof being restricted, and the chuck body (45) is positioned within the shaft cylinder (1) in front of the lead pipe (3) so as to be movable in an axial direction and circumferentially rotatable. A lead rotation mechanism (5) is provided between a back part of the chuck body (45) and a front part of the lead pipe (3).

Abstract: A device for application of a self-adhesive product, wherein the device operates with at least a first step and a second step. The first step and second step being temporally separate. A device for application of a flowable product includes a first section and a second section, the first section being sized such that at least a portion of the first section fits within the second section, the first section being slidable relative to the second section. A device includes a first section having a protrusion extending from its outer surface that fits through a slot in the second section.

Abstract: A mechanical pencil incrementally rotates a lead by operation of a touch button. The pencil has a barrel in which is disposed a holder. A rotatable pipe having a writing mechanism assembly incorporated therein is attached rotatably to the holder. Around the periphery of the holder, a slide member is disposed to undergo forward and rearward movement, and the slide member is moved forward by pressing the touch button disposed on the barrel. The holder houses a sleeve which is moved forward by the slide member and which turns in a circumferential direction. A rotation-transmitting cam face is provided on each of a front end face of the sleeve and a rear end face of the rotatable pipe. By the forward movement of the sleeve, the cam faces are engaged with each other to incrementally rotate the rotatable pipe, whereby the lead is incrementally rotated.

Abstract: A mechanical pencil comprises a shaft cylinder (1), a lead pipe (3) axially movably inserted into the shaft cylinder (1) and biased in a retract direction, and a chuck body (45) provided within the shaft cylinder (1) in front of the lead pipe (3) for releasably griping a writing lead (S). The lead pipe (3) and the chuck body (45) are separated, the lead pipe (3) is inserted into the shaft cylinder (1) with axial movement thereof being permitted and circumferential rotation thereof being restricted, and the chuck body (45) is positioned within the shaft cylinder (1) in front of the lead pipe (3) so as to be movable in an axial direction and circumferentially rotatable. A lead rotation mechanism (5) is provided between a back part of the chuck body (45) and a front part of the lead pipe (3).

Abstract: A side knock type mechanical pencil includes a knock button, a barrel, an intermediate lead tube, and a clip. A fixed hole is formed in the side wall of the front end of the barrel, and a rib groove is formed in the inner front side of the fixed hole. At least one button groove is formed in the front end of the knock button, and at least one protrusion or bump with an inclined plane is formed at the lower side of the rear end of the side button. A shaft is formed by the engagement of the button groove of the front end of the button with the rib groove of the fixed hole. At least one circular bulge which is adapted to engage with the protrusion or bump with the inclined plane is disposed on the side of the intermediate lead tube.

Abstract: Variations in the size of a stick-like object are accommodated, and abutments are urged to contact with the stick-like object with an appropriate pressure. A stick-like object feeding container is provided with: an outer sleeve 11 having a front spring shoe 11a formed on the internal circumference of the front portion of the outer sleeve; an inner sleeve 12 slidably inserted into the outer sleeve and having a rear spring shoe 12a provided on the outer circumference of the inner sleeve; a spring 13 abutting at its front and rear ends against the front spring shoe and the rear spring shoe, respectively, to bias the inner sleeve backward; a chuck 17 adapted to be capable of gripping, by its front end portion, the stick-like object inserted into the inner sleeve; and a chuck ring 18.

Abstract: A mechanical pencil has a hollow longitudinal main body and a slider slidably mounted in a front end of the main body. The slider has a through-hole through which a lead is fed and a front end face formed into a spherical surface centering around the through-hole for contacting a writing surface during a writing operation of the mechanical pencil.

Abstract: A knock-type writing instrument is provided, which allows an easy refill exchange with a simple operation while inhibiting deformation of slits, breakage of a shaft tube, etc., during the refill exchange.

Abstract: A stick cosmetic advancing container has a stick type cosmetic, an interior plate, a tubular sleeve having an application opening at its tip portion from which the stick type cosmetic is advanced, and a moving mechanism for moving the interior plate within the sleeve. A user holds the stick cosmetic advancing container to apply the stick type cosmetic. The sleeve is arranged to have a uniform internal cross-sectional shape throughout the moving range of the stick type cosmetic. Further, the surface of the application opening is inclined at an angle of ?1 with respect to the central axis A of the sleeve. Also, an outer side wall thickness W1 of an outer side wall portion 18 is arranged to be less than an inner side wall thickness W2 of an inner side wall portion 19.

Abstract: It is arranged that a writing lead (10) is grasped and released by reciprocation of a chuck (3) provided in a body cylinder (1) so as to inch the above-mentioned writing lead forward and a rotational drive mechanism is provided for rotationally driving a rotor (5) in one direction in conjunction with retreat operation by the writing pressure applied to the above-mentioned writing lead and forward movement by releasing the writing pressure. A pipe support member (8) for supporting a pipe end (7) is accommodated in a base (1A) which constitutes a front end portion of the above-mentioned body cylinder, and a retreat drive mechanism is provided for gradually retreating the pipe end supported by the above-mentioned pipe support member towards the above-mentioned body cylinder in conjunction with rotational drive operation of the above-mentioned rotor which constitutes the above-mentioned rotational drive mechanism.

Abstract: A chuck (4) for grasping a writing lead and a rotor (6) arranged to be movable in a direction of rotation and an axial direction within a body cylinder (1) are provided. A rotational drive mechanism for the writing lead is formed such that first and second cam faces (6a) and (6b) are respectively formed at one end face and another end face of the rotor in the axial direction, and first and second fixed cam faces (13a) and (14a) are arranged on the body cylinder side to face the above-mentioned first and second cam faces respectively. An indicator (6c) of a wedge-shaped notch is formed at a part of the rotor. The indicator can be observed through the body cylinder made of a transparent material. By this structure, a mechanical pencil is provided in which operation of the writing lead that is gradually rotated by way of writing pressure can be known certainly.

Abstract: A container used for holding one or more product sticks. The container comprises a body and a sleeve. The container further comprises lifting means to independently propel and retract the product sticks. The container may further comprise a cover which engages the body.

Abstract: The present invention generally is a delivery system for dispensing product(s) in adjustable quantities comprising a body, said body having at least one cavity for housing the product(s) and a plunger or a piston and rod assembly, an actuator being in communication with the cavity in the body, said actuator having an inclined profile at one of its ends which is in communication with the body, and a means for changing the position of the incline of the actuator with respect to the body wherein changing the position of the inclined profile of the actuator with respect to the body delivers different quantities of the product(s).

Abstract: Au automatic pencil comprising an outer pencil tube, a pencil head, a clipping device, a guiding tube and a pencil lead cylinder, characterized in that a resilient element is mounted between the guiding tube and the clipping device allowing the guiding tube to reciprocate upward and downward within the stopper. The resilient element urges the guiding tube to rise upward if the pencil lead cylinder is not depressed, and to keep a distance from the pencil lead, and to allow another pencil lead to be inserted. The pencil lead cylinder can adapt a plurality of pencil lead.

Abstract: A cosmetic stick has a stick housing, a refill extendable therefrom out of a refill opening as well as a feed device for extending the refill. The refill is in push connection with a piston guided in the housing. The feed device has a piston push rod and an actuating push rod. The actuating push rod is in push connection with an actuating element. The actuating push rod is in push connection with the piston push rod via a pair of stops. A stop alternating device allows alternation between the first stop and one of a plurality of second stops. The stop alternating device has a driver body fixed to the actuating push rod. A ramp cooperates with the driver body. The ramp incline is such that the first stop disengages from the instantaneous second stop as soon as the driver body has covered an advance path which is at least identical to the distance between two adjacent second stops. A pretensioning spring biases the actuating push rod in an unactuated rest position.

Abstract: A mechanical pencil includes an advancing mechanism and a slider both incorporated in a main body. The advancing mechanism has a chuck and a chuck ring (collar for fastening the chuck) for holding a lead, so as to advance the lead. The slider is slidable relative to the main body and has a lead guide and a lead friction member. The lead friction member is to friction with the lead and is made of thermoplastic elastomer.

Abstract: A natural mineral deodorant stick applicator includes a holder having at least one holder tab extending radially outwardly; an elongated outer tubular member having a longitudinal slot; an elongated inner tubular member rotatably held within the outer tubular member and having a notched helical groove. The tab of the holder is configured for projection through the helical groove and into the elongated slot. The holder is movable relative to the inner and outer tubular members as the inner tubular member is rotated relative to the outer tubular member. The notched helical groove includes a notched lower edge and a smooth upper edge. Each one of the plurality of adjacent inclined sections is set off from another adjacent inclined section by a step. The step forms a backstop which prevents the holder tab from retreating downwardly past the backstop. The step defines an increment of advancement. The holder tab is adapted to glide along the notched lower edge.

Abstract: A writing instrument that includes a tubular body extending along a longitudinal axis between a rear end and a front end provided with an opening through which a writing tip is capable of protruding, a lateral button having at least one actuation face oriented radially outward and at least one first cam arranged inside the body, and a writing tip advancing mechanism that include a movable member movable in a longitudinal direction in the body. The movable member includes at least a first ramp inclined relative to the longitudinal axis, the lateral button is capable of remaining in a rest position in which the first cam is facing the first ramp, and the lateral button is capable of making a first tilting movement toward the inside of the body during which the first cam interacts with the first ramp and the movable member makes a first movement.

Abstract: A writing instrument is capable of functioning both as an automatic mechanical pencil and as a shaking-type mechanical pencil. The writing instrument has a barrel cylinder constituted by a front cylinder detachably connected to a rear cylinder. A slider is disposed at the front end of the barrel cylinder, and a lead chuck, such as a ball chuck, is disposed rearwardly of the slider. A slider spring urges the slider forward and urges the lead chuck rearward. A lead reservoir is movably disposed rearwardly of the lead chuck. Around the outer periphery of the lead reservoir, a weight is disposed to undergo back-and-forth movement in an axial direction. On the outer periphery of the lead reservoir is disposed a weight-receiving cylinder against which the rear end of the weight abuts when the writing instrument is shaken. A knocking spring urges the weight-receiving cylinder forward and urges the lead reservoir rearward.

Abstract: A mechanical pencil is described. The mechanical pencil includes a grip barrel with a slide member to hold a piece of lead. A wheel is rotatably mounted in the grip barrel around a wheel axis, such that a portion of the wheel extends through and beyond an opening in the grip barrel. A gear is attached with the wheel for sliding the slide member that is slide-ably disposed within the grip barrel. A chuck is connected with the slide member such that a user may roll the wheel to force the chuck to push lead from the lead chamber and out of the grip barrel, thereby allowing the user to control advancement of the lead from the mechanical pencil.

Abstract: A pencil with buffering effect for prevent a pencil lead from breaking comprises a head tube; a stepped element installed within the head tube and resisting against a front end of the spring; a spring; the spring having two sections, a front section and a rear section; the front section being denser than the rear section; a positioning tube; a plug resisting against the positioning tube; an inner tube enclosed by the spring and a rear end of the spring being in contact with the positioning tube; the inner tube passing through the positioning tube; a distal end of the inner tube being connected to a plug; a sleeve enclosing the inner tube and the positioning tube; the sleeve being connected to the head tube; and a pencil lead received within the stepped element.

Abstract: A mechanical pencil assembly including an eraser detachably secured to the writing end thereof, said eraser defining a bore therethrough, diameter of said bore larger than the diameter of the writing tip of said mechanical pencil such that said writing tip can be projected therethrough when writing is desired and retracted therefrom when erasure is desired. The need for a user to adjust his or her grip of the mechanical pencil assembly to transition from writing to erasure or from erasure to writing is completely eliminated, making both transitions nearly immediate and nearly effortless. A further feature of the present invention is a first storage compartment disposed within said barrel wherein additional pencil leads can be stored and a second storage compartment disposed within said barrel wherein additional erasers can be stored.

Abstract: The lead propelling device of the invention is a lead propelling device having a structure for gripping and releasing the lead by a lead gripping mechanism by knocking operation, not transmitting the knocking force to the lead gripping mechanism in knock forward operation, wherein a stopper not allowing the lead to pass by its own weight interlocks with the knock operation, the lead abuts against the stopper rear end upon release of the lead, the lead is inserted into the stopper after gripping the lead in knock backward operation, thereby propelling the lead, and therefore after the knock operation part advances by a predetermined distance, the lead gripping mechanism clears gripping of the lead, and when the lead gripping mechanism grips the lead in the backward stroke of the knock operation part, the knock operation part is set to be movable backward further by a predetermined distance.

Abstract: A double-chuck mechanical pencil comprises a barrel, a barrel cap detachably attached to a front end of the barrel, a lead tank inserted in the barrel, a feed chuck for feeding leads, combined with the lead tank, a sleeve bolster disposed on the front side of the feed chuck, and a holding chuck combined with the sleeve bolster. A holding chuck unit including the holding chuck and the sleeve bolster, and a feed chuck unit including the feed chuck and a sleeve can come into contact with each other in the barrel cap.

Abstract: A dispenser for dispensing a material and a method of use thereof. The dispenser includes a chamber with a discharge opening for holding and dispensing a material, a spindle located in the chamber, capable of being rotated, a rotatable toothed wheel located outside the chamber that is connected to the spindle to permit rotation of the spindle, and a moveable piston, connected to the spindle, for supporting and dispensing the material. The dispenser also includes at least one actuating button located on the dispenser, having a pusher element for rotating the toothed wheel, and at least one pusher deflector for deflecting the pusher element out of engagement with the toothed wheel. The pusher deflector permits the material to be pushed back into the dispenser after use by disengaging the pusher element with the toothed wheel. The dispenser is particularly useful for dispensing a deodorant, gel, or cream.

Abstract: A pencil has a fixed non-replaceable eraser and a moveable sleeve. The fixed non-replaceable eraser is elongated to provide a larger eraser to pencil ratio in order to have more erase cycles per write cycles. The moveable sleeve can be moved to selectively expose a portion of the eraser. A ferrule couples the pencil body and the eraser together and provides an outer surface to engage an inner surface of the moveable sleeve. In one embodiment, a threaded female slot in the outer surface of the ferrule engages a male threaded tab in the inner surface of the sleeve. In another embodiment, a plurality of concentric slots in the outer surface of the ferrule engage a tab in the inner surface of the sleeve.

Abstract: Disclosed is a double chuck type mechanical pencil and an internal writing mechanism thereof comprising a feed chuck for feeding a normal lead, and a tip chuck for holding the tip of a lead for reducing a residual lead. The double chuck type mechanical pencil comprises a lead tank provided movably in a longitudinal direction within a barrel, a feed chuck connected to the lead tank to feed leads, a chuck ring loosely fitted in the feed chuck, a sleeve provided externally of the feed chuck, a chuck spring provided between the sleeve and the lead tank, an inner tube provided externally of the sleeve and movable integrally with the sleeve, a cushion spring provided between the inner tube and the barrel, a tip chuck provided on the end part of the inner tube, a tip ring provided externally of the tip chuck, and a tip spring provided between the tip chuck and the inner tube.

Abstract: A double-chuck mechanical pencil has an outer tube, a tip fitting provided in the front of the outer tube, a tip chuck located at the tip of the tip fitting for holding a writing substance (e.g., a lead) and urged rearward in the axial directed, and a delivery chuck for delivering the lead. At least one of the tip chuck and the delivery chuck is formed of a synthetic resin material including polyoxymethylene.

Abstract: A cap fixing construction for mounting a cap on a barrel, includes a slit formed in the cap and extending in an axial direction from an end of the cap, and a longitudinal rib formed on the barrel and extending in the axial direction, so that the cap is fixed on the barrel by fitting the longitudinal rib in the slit.

Abstract: A double-chuck mechanical pencil has an outer tube, a tip fitting provided in the front of the outer tube, a tip chuck located at the tip of the tip fitting for holding a writing substance (e.g., a lead) and urged rearward in the axial directed, and a delivery chuck for delivering the lead. At least one of the tip chuck and the delivery chuck is formed of a synthetic resin material including polyoxymethylene.

Abstract: A writing utensil includes an external cylinder, a lead feeding mechanism housed in the external cylinder and propelling a lead forward, and a rear-end knocking member movable in conjunction with the lead feeding mechanism in an axial direction. The rear-end knocking member is integrally formed and includes a cylindrical section, a clip section, and a connecting section. The cylindrical section has a central hole into which the rear end of a lead case of the lead feeding mechanism is inserted and in which the rear of the cylindrical section protrudes from the rear end of the external cylinder. A clip section extends outside and along the external cylinder in an axial direction and a connecting section passing through a stem hole formed in the rear side face of the external cylinder for connecting the cylindrical section and the clip section together.

Abstract: A press type mechanical pencil includes an upper barrel, a press device, a refill tube, an abutting rod, a clamp/release device and a lower barrel. An insert post of the clamp/release device has a top portion connected to the abutting rod which is centrally provided with a refill hole for passage of refills. A refill tube is disposed between the abutting rod and the press device. A storage tube has a tube chamber for receiving a plurality of refills, and an open end connected to a tube plug. The tube plug is adapted to guide the refills and for connection with the abutting rod. A neck hole therein provides passage for only one refill through the refill hole into the clamp/release device.

Abstract: A double chuck type mechanical pencil comprising a lead tank 4 slidably provided within an axial tube 1, a rear chuck 5 for drawing out a lead fixedly mounted on the front end of the lead tank 4, a chuck ring 6 loosely fitted in the rear chuck 5, a rear resilient component 8 for biasing rearward the tank 4 and the rear chuck 5, a front chuck 11 for holding a lead connected to the rear chuck 5 through a connecting means 7, 9, a front resilient 10 component for biasing rearward the front chuck 11 disposed within a tip member 2 provided in the front of the axial tube 1, and a loosely fitted tube 12 at least having a stopper portion 12b at the rear end provided in an opening portion of the tip member 2, and thereby preventing abrasion around an opening at the extreme end of the tip member 2 caused by impingement of the front chuck 11, and not giving rise to twisting of the lead caused by rotation of the chucks 5, 11.

Abstract: A side-knock type mechanical pencil comprising a barrel having an opening in a side wall, a chuck mechanism housed in the forepart of the barrel, a slider moved back and forth within the barrel to open and close the chuck mechanism, a knock lever which is inserted into the opening with an upper front end pivotally mounted with respect to the barrel, a lower front end thereof being placed in contact with the slider, and a resilient member for holding the knock lever in an initial position.

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: An installation structure for a writing instrument includes an outer cylinder and a lead advancing mechanism, which is housed in the outer cylinder and has a sleeve provided with a protruding portion protruding in the outward direction, for advancing a lead by a predetermined amount. The lead advancing mechanism is installed in the outer cylinder so as to prevent the lead advancing mechanism from coming off (e.g., decoupling from) the outer cylinder by making the front end of the sleeve abut a step portion formed on the inner peripheral surface of the outer cylinder and fixing the protruding portion provided on the sleeve to a second step portion formed on the inner peripheral surface of the outer cylinder.

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 slider type mechanical pencil has an outer tubular member having a front end and a rear end. An inner tubular member is disposed in the outer tubular member for axial movement therein and has a lead advancement mechanism for axial movement within the outer tubular member to advance a pencil lead toward the front end of the outer tubular member. A slider has a first end portion projecting from the rear end of the outer tubular member and a second end portion. The slider extends into the outer tubular member so that the first end portion of the slider can be pressed in the axial direction relative to the outer tubular member to move the inner tubular member and the lead advancement mechanism in the axial direction toward the front end of the outer tubular member. A pusher member extends into the outer tubular member for axial movement therein and has a first end portion projecting from the rear end of the outer tubular member and a second end portion.