Abstract: The components of a push button comprise a plunger, a retainer, a spring and an end cap. The plunger has a button at the top, a middle section with an enlarged square cross-section, and a pin of reduced diameter at the bottom end. The plunger slidably strokes up and down within a retainer which has an upper portion that closely holds the button on the top of the plunger and also includes a rectilinear recess sized to receive the square midsection of the plunger. A middle portion of the retainer comprises an enlarged cylindrical cavity bounded above and below by opposing roof and floor surfaces. The roof and the floor have cams that engage the corners of the plunger midsection which cause it to rotate during plunger strokes. A spring within the retainer biases the plunger upward. The assembly of parts is captivated by a retainer end cap.

Abstract: A push button consists of component parts including a plunger, a retainer, a spring and an end cap. The plunger reciprocates within the retainer which has three main portions: an upper portion closely holds the button on the top of the plunger and includes a rectilinear recess that can receive a square midsection of the plunger. A middle portion of the retainer comprises an enlarged cavity that provides the side clearance for the plunger pin's enlarged square midsection to rotate. The cavity is bounded above and below by opposing roof and floor camming structures which engage the corners of the plunger midsection that causes it to rotate. A spring within the retainer biases the plunger upward. An end cap affixed to the bottom of the retainer captivates the plunger and spring assembly and provides attachment means to affix the push button assembly to a supporting structure.

Abstract: A multi-function writing instrument comprises a body extending in an axial direction and a radial direction, and having at least two writing elements arranged inside the body, each writing element comprising a writing head and a button, at least one button extending in the radial direction through a window and allowing the writing element to be moved between a retracted position in which the writing head is retracted into the body and a writing position in which the writing head projects from the body, and one of the writing elements being a leadholder system comprising a leadholder mechanism and a lead container, the button of the leadholder system comprising a lead-insertion channel extending in the axial direction.

Abstract: A cutting device is disclosed. The cutting device has a housing assembly, a cutting assembly that is movably disposed in the housing assembly, the cutting assembly being movable in a first axis, between a retracted position and an extended position, and an urging member disposed between the housing assembly and the cutting assembly. The cutting assembly includes a cutting member. The cutting assembly includes an end assembly, which is actuatable in the first axis, and a movable member that is movable relative to the cutting assembly. When the end assembly is actuated, the urging member biases the cutting assembly in the first axis toward the retracted position. When the end assembly is actuated, the end assembly moves the movable member in a second axis that is different from the first axis.

Abstract: An axial-to-rotary movement configuration including a sleeve having a sleeve angulated castellation and a lug receptacle, a lug disposed in the lug receptacle, and a mandrel disposed in part within the sleeve, the mandrel having a mandrel angulated castellation nestable with the sleeve angulated castellation and further including an extension cam surface and a ramp, the ramp having a limit surface and configured to allow rotational motion of the sleeve relative to the mandrel in one direction only.

Abstract: A combination writing utensil and handcuff tool including a writing utensil having a slotted interior chamber and a plurality of spring-loaded buttons. A pair of writing tips is disposed within the slotted interior chamber, with each of a first of the pair of writing tips and a second of the pair of writing tips engaged with each of a first of the plurality of spring-loaded buttons and a second of the plurality of spring-loaded buttons, respectively, and lockably extended through an opening of the writing utensil. Additionally, each of a handcuff key and a handcuff lock is disposed within the slotted interior chamber of the writing utensil. Each of the handcuff key and the handcuff lock is engaged with each of a third of the plurality of spring-loaded buttons and a fourth of the plurality of spring-loaded buttons, respectively, and lockably extended through the opening of the writing utensil.

Abstract: A press structure for a press type stationery, having mounting board (1), a button (400) and a resilient piece. The mounting board has a recess (11). A position limiting block (12) is provided at the front surface of the mounting board in this recess. A closed loop sliding track is formed between outer walls of the position limiting block and inner walls of the recess. The resilient piece has a spring (2) and a resilient rod (3). The position limiting block has a first inclined surface (122) and a second inclined surface (123). End portions of the first and second inclined surfaces are at one side of the resilient rod; upper ends of the first and second inclined surfaces are at another opposite side of the resilient rod. A contact part (4) positioned within the sliding track is provided at an upper end portion of the resilient rod.

Abstract: A retractable pen includes a barrel, an ink cartridge, a limiting member, a shifting member and a deformable member. When the shifting member is moved relative to the limiting member between a first position and a third position, the ink cartridge can be moved from a retracted position to an extended position or from the extended position to the retracted position. When the ink cartridge is located at the extended position, the deformable member can be further compressed by between the shifting member and the ink cartridge, allowing the shifting member to be moved further from the third position to a second position closer to the ink cartridge. When the shifting member is located at the second position, the ink cartridge is continuously held to the extended position and pressed against a lead-out opening of the barrel without the risk of swaying when a user writes with the retractable pen.

Abstract: A writing implement comprises first to n-th members (n is a natural number), an inner tube and a device of mechanism for projecting or retracting a writing tip connected to the first member, and the first to n-th members are stacked around the inner tube. Each of the first to n-th members is able to transmit rotational motion to the adjacent member. With such a structure, design quality can be improved. Also, it can provide a writing implement which attracts people even when they are not writing.

Abstract: The invention relates to a system for treating blood, which includes a single cassette capable of carrying out the various CRRT treatments.

Abstract: A medical connector system including a first connector and a second connector. The first connector has a housing, a biasing member, and at least one projection. The second connector has at least one groove for receiving the at least one projection. The proximal end of the second connector is configured to be at least partially disposed within the distal end of the housing of the first connector. Upon application and release of a first set of opposing axial forces applied to the connector system, the first connector is locked to the second connector and, upon application and release of a second set of opposing axial forces, the first connector is released from the second connector. The connectors may include indicators to show when the connector system is in the locked position.

Abstract: A stationery tool has a body, a pushbutton, a working element, and a push-proof device. The pushbutton is pushably and rotatably mounted on an end of the body. The working element is mounted in the body and is connected to and driven by the pushbutton. The push-proof device is mounted between the body and the pushbutton and has a blocking protrusion and a blocking segment. The blocking protrusion is disposed on the pushbutton. The blocking segment is disposed on the body, selectively abuts the blocking protrusion and has a passage defined in the blocking segment to allow the blocking protrusion to pass the blocking segment. Accordingly, a push-proof capability is provided to the pushbutton to prevent the working element from extending out of the body unintentionally.

Abstract: An automatic rotation type correction tape structure comprises an outer casing, an inner casing and a tape delivery module. The outer casing has an opening and a circular top abutting surface formed inside the outer casing and proximate to the opening. The inner casing is movably installed in the outer casing and has an engaging structure corresponding to the inner casing, such that the inner casing can be rotated axially with respect to the outer casing. The tape delivery module is installed in the inner casing and has a tape guiding spout at an end of the tape deliver module. When use, the tape guiding spout is pressed to drive the inner casing to rotate axially in the outer casing in order to adjust an operating angle and improve the convenience of the use.

Abstract: A retractable writing instrument that includes a barrel, a writing tip, an actuating mechanism that includes a plurality of parts for extending and retracting the writing tip upon actuation of the actuation member, and a cushioning device enabling a retraction of the writing tip when an excessive pressure is exerted by a user. The cushioning device includes a spring member elastically deformable, which is integrally formed with a movable part of the actuating mechanism, the part being movable relative to the barrel. The spring member has a free end abutting the barrel toward its rear end and has a through hole. A stem extends within the spring member's hole and connects the actuating member to the actuating mechanism.

Abstract: An adhesive tape dispenser has a body, an adhesive tap dispensing unit, a knob, a pushing element and a resilient element. The adhesive tape dispensing unit is mounted in the body. The knob is mounted rotatably on the body and has a guiding structure formed obliquely on the knob and having two ends each having a limiting capability to restrict a rotating range of the knob relative to the body between the ends of the guiding structure. The pushing element is mounted slidably in the body, is connected between the knob and the adhesive tape dispensing unit and has a guided structure connected slidably to slide along the guiding structure on the knob when the knob is rotated. The resilient element is mounted in the body to provide a recoil force to the adhesive tape dispensing unit.

Abstract: A slide body (6) is arranged in a cut-away portion of a holder (1) under a clip (2a) so as to not hinder writing or portability, and a safety mechanism is constituted so as to be engaged with the clip (2a). Due to functions of a knock rod cam (4a) of a knock rod (4) and a knock cam (3a) of a rotor (3), further, the rotor (3) is rotated and moved forward responsive to each knocking operation, a refill (7) is brought to a writing position and a holding position alternately responsive to each knocking operation due to a cam mechanism provided in the inner wall of an inner cylinder (2) and a reactive force of a spring (5). A slide body cam (6a) provided on the slide body (6) is incorporated in a portion of the cam mechanism so that the knock type writing instrument thrusts the pen point out, by one knock even after the safety operation.

Abstract: A lamp pen includes a pen body, a refill, a conductive rotating slide, a lamp, and a cartridge holding a battery. The rotating slide is electrically connected to the battery. A conductive bar on a surface of the slide abuts an end of the cartridge, which comprises a helical surface forming higher and auxiliary higher slots disposed at a highest point of the surface. A first lead of the lamp is connected to the battery, and a second lead is affixed within the higher slot. Rotating the slide causes the conductive bar to engage either the higher slot or auxiliary higher slot, pushing the cartridge downward so that the refill extends out of the pen tip. When the higher slot is engaged, the second lead of the lamp connects to the conductive bar, the electric circuit completes, and the lamp illuminates.

Abstract: A writing instrument includes a travel multiplier mechanism that includes a cam member that pivots about a pivot axis in response to motion of a push button member. The cam member engages a sliding piston member in order to provide a travel multiplying effect such that a distance of travel of the sliding piston member exceeds a distance traveled by the push button member.

Abstract: Upon depressing a knock rod in a state of writing of FIG. 8A, a cam protuberance 3b of a rotor turns rightward to assume a position shown in FIG. 8B. Upon removing a finger, the cam protuberance 3b turns sliding on a tilted surface, arrives at a position shown in FIG. 8C through a first vertical motion (distance d) and, further, arrives at a position shown in FIG. 8D through a second vertical motion (distance e). Here, a tilted surface of cam protuberance 3b comes in collision with a tilted surface of an inner cylinder cam 2b twice, and shocks are transmitted to a refill 7. By forming a step between the front half and the rear half of the tilted surface of the inner cylinder cam 2b, however, a distance of vertical motion of the cam protuberance 3b each time is shortened to decrease the shock of collision imparted to the refill each time.

Abstract: A writing instrument includes a travel multiplier mechanism that includes a cam member that pivots about a pivot axis in response to motion of a push button member. The cam member engages a sliding piston member in order to provide a travel multiplying effect such that a distance of travel of the sliding piston member exceeds a distance traveled by the push button member. The cam member may be configured to rotate about an axis that is located in a plane perpendicular to a primary axis of a barrel of the writing instrument.

Abstract: A lamp pen includes a pen body, a refill, a conductive rotating slide, a lamp, and a cartridge holding a battery. The rotating slide is electrically connected to the battery. A conductive bar on a surface of the slide abuts an end of the cartridge, which comprises a helical surface forming higher and auxiliary higher slots disposed at a highest point of the surface. A first lead of the lamp is connected to the battery, and a second lead is affixed within the higher slot. Rotating the slide causes the conductive bar to engage either the higher slot or auxiliary higher slot, pushing the cartridge downward so that the refill extends out of the pen tip. When the higher slot is engaged, the second lead of the lamp connects to the conductive bar, the electric circuit completes, and the lamp illuminates.

Abstract: A writing instrument has a writing refill slidably disposed in a tubular casing. A rotary cam mechanism extends and retracts the writing refill in response to knocking of a knocking member at a rear end of the casing. The rotary cam mechanism includes a cam cylinder inserted axially into the rear end of the casing, and projections on the cam cylinder engage with apertures in the casing to prevent axial movement of the cam cylinder inside the casing. Rotational movement of the knocking member rotates the cam cylinder and disengages the projections from the apertures, thereby permitting withdrawal of the cam cylinder from the casing and replenishment of the writing refill.

Abstract: A writing utensil having a distal end and a proximal end and extending generally along a longitudinal axis includes a casing having a slot extending generally along the longitudinal axis adjacent the proximal end, an eraser disposed on the proximal end of the casing, a valve coupled to the casing adjacent the distal end and including a valve door, a writing tip movable between a stored position in which the tip is stored within the valve and a writing position in which the tip extends out of the valve, and an actuator disposed in and slidable in the slot and operatively coupled to the writing tip such that movement of the actuator in the slot moves the writing tip between the stored position and the writing position.

Abstract: An advancing/retracting mechanism having a pair of cams is disclosed. The advancing/retracting mechanism includes a first cam, a second cam, and a barrel. The first cam includes an angled surface and a shoe, and the second cam includes an angled surface and a slider. The shoe engages with a helical surface in the barrel, and the slider engages with a straight surface in the barrel. The first cam travels a first distance along the longitudinal axis of the barrel from a first to a second state, and the second cam travels a second distance that is greater then the first distance along the longitudinal axis of the barrel from the first to the second state.

Abstract: A capless holding device which does not use any removable caps but which can reliably move a medium between a projected position and a housed position is provided. The capless holding device includes a cylinder holding a refill that is movable between a projected position and a housed position. The cylinder includes a tip opening out of which a pen tip of the refill located at the projected position is projected and a housing section that seals the pen tip of the refill located at the housed position. A rotating cylinder is connected to the axial cylinder so as to relatively rotatively movable, an engaging projection integrally provided on the refill, a cam groove formed in the rotating cylinder to guide the engaging projection forward and backward in unison with rotation of the rotating cylinder, and a guide groove formed in the axial cylinder to guide the engaging projection in a rotating direction.

Abstract: The present invention provides a capless holding device which does not use any removable caps but which can reliably move a medium between a projected position and a housed position. The capless holding device includes a cylinder holding a refill that is movable between a projected position and a housed position. The cylinder includes a tip opening out of which a pen tip of the refill located at the projected position is projected and a housing section that seals the pen tip of the refill located at the housed position. A rotating cylinder is connected to the axial cylinder so as to relatively rotatively movable, an engaging projection integrally provided on the refill, a cam groove formed in the rotating cylinder to guide the engaging projection forward and backward in unison with rotation of the rotating cylinder, and a guide groove formed in the axial cylinder to guide the engaging projection in a rotating direction.

Abstract: A writing implement comprising a housing (2), a writing cartridge (4) arranged in the housing in a movable manner, and a control unit that displaces the writing cartridge between a first position in which the cartridge tip (6) protrudes from the housing for writing, and a second position in which the cartridge is retracted into the housing. In the first position the writing implement has a total length suitable for writing, and in the second position the writing implement is contracted. The writing implement exhibits improved handling without major structural modification, so that the writing implement can be brought into the writing position and also extended in a single hand movement. To achieve this the implement is provided with a depressor (8) which is configured as an extension of the housing and can be actuated to move the writing cartridge between the first and second positions, and which in the first position extends out from the rear end of the housing.

Abstract: There is suggested a writing instrument having a shaft (9) and a push member (K,L;10) especially formed in one piece, which push member comprises a push portion (L), a body portion (K,50) and a switch rod portion (S) extending from the body portion in the axial direction and comprising a switch tooth (Z) protruding radially therefrom, which switch tooth (Z) is displaced within shaft (9) by at least one small segment (A,B) of shaft (9), being reshaped in the radial direction, upon actuation of the push member (10) in particular in the circumferential, tangential and/or radial directions; or which comprises two axially spaced apart stable positions corresponding to the writing position and the retracted position of the writing instrument, wherein switch tooth (Z), in both positions, assumes the same at least circumferential (tangential) position only axially displaced; or which is arranged on the switch rod portion in such a manner and has such a circumferential (tangential) extension (z6,z2) and shape that a c

Abstract: A stylized writing instrument shaped like a proprietary or familiar object. Embodiments of the invention include a housing shaped like the proprietary or familiar object, a writing implement, and internal mechanisms provided within the housing for extending the writing implement from, and retracting the writing implement into, the housing. The internal mechanisms may comprise a wide variety of actuation systems for extending and retracting the writing implement, including a cam actuation assembly, an edge slide actuation assembly, a gravity actuation assembly, a pressure actuation assembly and a push button actuation assembly.

Abstract: A writing instrument with a retraction device includes a hollow barrel, a grip attached to a lower end of the hollow barrel, a writing implement mounted in the hollow barrel and the grip, and an elastic member mounted around a lower portion of the writing implement. The grip has a rigid sleeve mounted in a lower end of the grip opposite to the hollow barrel. The writing implement has a writing tip formed on a lower end of the writing implement, which selectively extends through the rigid sleeve in the grip. The elastic member abuts the rigid sleeve and is driven by the rigid sleeve. The user only needs to press the writing tip or the rigid sleeve to retract or extend the writing tip.

Abstract: A combination tool capable of being clipped into a pocket which incorporates an outwardly biased writing implement, e.g., pen, into a tip of a removable Phillips-head screwdriver tip at one end of a hexagonal tube while having a removable second tip, e.g., regular screwdriver tip at an opposed end. The handle, an inwardly biased clip affixed thereto for fastening into a shirt or pant pocket, is used for facilitating rotational movement of the hexagonal tube with screw tips attached, and is insertable over either tip and at least partially onto the hexagonal tube, an interior hole within the handle being dimensioned so as to permit sliding frictional engagement between the handle and the tube. In a preferred embodiment, the pen has a selectively retractable tip, retracting effected by converting inward radial force into compressive longitudinal movement.

Abstract: A safety knock-type writing utensil capable of maintaining an outer shell in a relatively thin thickness and making a length of a writing lead substantially long by the change of the locking position, thereby allowing a large amount of ink to be stored therein.

Abstract: A ball-point pen is so configured that an elastic body is installed in a state that it cannot be pulled out such that it can push a ball at the point at all times directly or indirectly via a movable member, satisfying a relation 20·W<P<75·W between a projection area W (mm2) of a diameter of a writing ball and a pushing force P (g) of an elastic body. Moreover, the effect can be increased by restricting a return load and materials.

Abstract: A knocking writing utensil for use with a writing medium includes an external cylinder for receiving the writing medium located inside the external cylinder, the medium being urged rearwardly, a rotational cam mechanism including a cam cylinder capable of rotating and moving rearwardly and forwardly inside the external cylinder and regulating rearwardly movement of the writing medium, a cam body for rotating the cam cylinder at a predetermined angle each time the cam cylinder is propelled forwardly so that the cam cylinder moves alternately to a forward position and a withdrawal position, and a cam bar capable of pushing the cam cylinder forward. A knock body is connected with the cam bar so that a knock operation is feasible, the knock body undergoing a knock operation so that the cam cylinder rotates as well as moves rearwardly and forwardly in the axial direction to drive the writing medium.

Abstract: A rotary locator with differential position in a pen comprises an adapter head, a follower stem, and a cam. The adapter head is fixed at the top of the pen, an upper forked portion with a pivot device at the top thereof to form a groove seat, and a lower portion thereof has a central through hole. The follower stem is disposed in the central through hole and extends inward the pen. The cam is disposed in the groove seat, has two opposite flat planes on the contour thereof, an eccentric device between said two flat planes, and the eccentric device to align with the pivot device so as to rotate in the groove seat eccentrically. While the cam is turned, the follower stem displaces by way of a top thereof keeping contact with the contour of the cam. The follower stem can be located at one of two specific positions respectively because of the pivot device having different distances apart said two opposite flat planes respectively.

Abstract: A pressing device for a pen and the pen further comprises a spring, and a center stick fitting with the spring and having a nib part. The pressing device further comprises a penholder, a movable tube, a bounce device, a press cap, and a clipping part. While the clamping piece on the clipping part touches a clipped article, the pen clip is urged to move outward and the clamping piece disengages with the engaging piece. The engaging piece moves upward along the guide slot because of the stretching of the spring and the pressing of the center stick till the stop ring has pressed against the upper opening. Accordingly, the nib part of the center stick may be received in the penholder automatically.

Abstract: A knocking writing utensil which automatically returns a writing medium to a withdrawn position when a clip is used, includes an engagingly-locking protrusion formed on an engagement body that moves inside an external cylinder together with a refill. An engaging-lock receiving protruding portion including an engaging-lock receiving portion at its front end is formed on the rear surface of a non-proximal end of a clip with its proximal and fixed to the external cylinder. A guide hole is formed in the external cylinder so as to correspond to the engaging-lock receiving protruding portion. A cam portion for abutting on the engagingly-locking protrusion is formed on a knock bar integrated with a known body.

Abstract: A side knock-type ball point pen includes a barrel having a front end portion and a rear end portion, a refill-receiver member axially movably incorporated within the barrel, a refill removably received in the refill-receiver member, the refill including an ink container-tube, a writing tip attached to a front end of the ink container-tube, and ink contained in the ink container-tube, a first cooperating mechanism provided in an interior of the rear end portion of the barrel for preventing the refill-receiver member from rotating relative to the barrel, a second cooperating mechanism provided in an interior of the rear end portion of the barrel for keeping the writing tip of the refill projected out of the barrel in use of the ball point pen, the refill-receiver member coupled to the second cooperating mechanism, and an actuator member provided at a portion of a peripheral wall of the barrel for causing the refill-receiver member to be advanced.

Abstract: A writing instrument operated by a finger at a holding position comprising a hollow body for containing at least one refill, in which each refill is always forced toward a retracted position in the hollow body, and is moved between the writing position and a resting position by means of a cam mechanism which is operated by an actuating knob provided at a position near the portion of the hollow body to be grasped by a user's finger-tips.

Abstract: An operating mechanism of a retractable ball-point pen including a ring mounted over a pin. The pin has at one end thereof a push button and at the other end thereof a portion having a greater diameter. Additionally, the pin has at least one pair of ribs which interact with grooves and saw-toothings on at least one end of the ring. The ends of the ribs are preferably provided with inclined lifting surfaces. To facilitate assembly, the saw-toothings may be symmetrically formed such that the direction of insertion into a pen housing is not critical. Preferably, the saw-toothings of the ring extend only over an inner partial portion of the wall thickness of the ring and the outer partial portion of the wall thickness of the ring forms a plane end face. A pen housing in which the operating mechanism may be positioned has axially extending supports configured to support the ring, preferably by engaging the plane end face of the ring.

Abstract: A clicking-type writing implement includes a writing element having a writing portion at its distal end, a spring for urging the writing element toward the end, and a clicking rod loosely fitted interlocked with the writing element so as to project from a barrel cylinder. Upon depression of the clicking rod, the engaging rib of a rotor in the barrel cylinder and the engaging bead in the inner cylinder engage with each other, so that the writing element projects and stays projected from a front portion of the barrel cylinder. This clicking-type writing implement also has a so-called double clicking mechanism and a safety mechanism. According to the double clicking mechanism, the clicking rod is projected upon depression and is retracted upon further depression.

Abstract: A writing instrument with an advance-retract mechanism is operable by rotation of a knob opposite the writing tip. The knob rotates a shaft disposed in, and extending rearwardly from, the instrument body to advance and retract the writing tip when rotated. A retainer member has a first cylindrical portion with a plurality of inwardly extending tangs into which the shaft is received and a larger cylindrical portion having a surface directed toward the instrument body.

Abstract: A refill unit (1) for a writing instrument has a writing tip (5) at one end and a ratchet mechanism (7) at the other end through the use of which the unit (1) can be turned and selectively extended from and retracted into the writing instrument. The ratchet mechanism (7) is rotatable about the longitudinal axis of the unit with respect to the writing tip (5). Each time the refill unit (1) is extended from or retracted into the writing instrument, the tip (5) rotates by a substantially random amount which ensures a more even distribution of wear on the writing tip (5).

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 voice pen comprises: a housing, an applying ink part, a part for retracting and extending the ink applying part; and an audio module for reproducing an audible message in response to extension of ink applying part. More specifically, extension and retraction of the ink applying part is provided by a function shaft and holder. This function shaft also activates a switch of the voice module that initiates the reproduction of the audible message.

Abstract: A writing instrument includes an advance-retract mechanism for projecting the writing tip from within the barrel for employment of the writing instrument, and retracting the tip to a point within the barrel, when the writing instrument is not in use. A plunger assembly includes a rotatable knob which is disposed at the top of the barrel and is interconnected to a finger which contacts the cam surface of a slidable actuator. Rotation of the knob in one direction advances the writing tip from within the barrel and opposite rotation of the knob is effective to retract the writing tip into the barrel.

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.

Abstract: A writing instrument includes a reservoir, a barrel in which the reservoir is received for a longitudinal displacement between a retracted position and a writing position, a push button for actuating the reservoir, and a shift device for moving the reservoir between the positions in which the reservoir is latchable with spring biasing. The shift device has a controlling curved portion arranged fixedly in the barrel and a movable actuating device, the actuating device including the push button and at least one elastically deflectable shift rod arranged to latch with the insert and unlatch from the latter so that latching and unlatching movements of the shift rod are associated with different planes.

Abstract: A refillable ballpoint pen structure in which the refill can be extended or retracted by relative rotation of the parts of the pen structure through 360.degree.. A driving casing tube is fixed in the upper end of a body tube and an external casing tube is fitted over the driving casing tube for relative rotation but not axial movement. A driving axial tube is rotatable within the driving casing tube and is axially slidable and non-rotatably engaged with the interior of the external casing tube. The driving casing tube has a sinuously curved groove therearound, in which an inwardly projecting projection on the driving casing tube is engaged for causing longitudinal movement of the driving axial tube upon relative rotational movement between the driving axial tube and the driving casing tube. A spring is fitted between the driving axial tube and the driving casing tube and a cap is fitted over the external casing tube and in which the external casing tube is relatively axially slidable and non-rotatable.

Abstract: An advancing/retracting mechanism having a pair of cams is disclosed. The advancing/retracting mechanism includes a first cam, a second cam, and a barrel. The first cam includes an angled surface and a shoe, and the second cam includes an angled surface and a slider. The shoe engages with a helical surface in the barrel, and the slider engages with a straight surface in the barrel. The first cam travels a first distance along the longitudinal axis of the barrel from a first to a second state, and the second cam travels a second distance that is greater then the first distance along the longitudinal axis of the barrel from the first to the second state.