WO2011067913A1 - Porte-mine - Google Patents

Porte-mine Download PDF

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Publication number
WO2011067913A1
WO2011067913A1 PCT/JP2010/006939 JP2010006939W WO2011067913A1 WO 2011067913 A1 WO2011067913 A1 WO 2011067913A1 JP 2010006939 W JP2010006939 W JP 2010006939W WO 2011067913 A1 WO2011067913 A1 WO 2011067913A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
cam surface
writing
chuck
mechanical pencil
Prior art date
Application number
PCT/JP2010/006939
Other languages
English (en)
Japanese (ja)
Inventor
中山協
小林武
井澤弘壮
Original Assignee
三菱鉛筆株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2009275429A external-priority patent/JP5215283B2/ja
Priority claimed from JP2009275428A external-priority patent/JP5215282B2/ja
Application filed by 三菱鉛筆株式会社 filed Critical 三菱鉛筆株式会社
Priority to CN201080053881.3A priority Critical patent/CN102648098B/zh
Publication of WO2011067913A1 publication Critical patent/WO2011067913A1/fr
Priority to HK13101791.4A priority patent/HK1174591A1/xx

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K21/00—Propelling pencils
    • B43K21/02—Writing-core feeding mechanisms
    • B43K21/22—Writing-cores gripping means, e.g. chucks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K21/00—Propelling pencils
    • B43K21/006—Pencil-barrels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K21/00—Propelling pencils
    • B43K21/02—Writing-core feeding mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K21/00—Propelling pencils
    • B43K21/02—Writing-core feeding mechanisms
    • B43K21/16—Writing-core feeding mechanisms with stepwise feed of writing-cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K23/00—Holders or connectors for writing implements; Means for protecting the writing-points
    • B43K23/008—Holders comprising finger grips

Definitions

  • This invention relates to a mechanical pencil capable of rotating a writing core (replacement core) using writing pressure.
  • the chuck that grips the writing core is configured to retract by receiving the writing pressure, and the writing core is rotated together with the chuck by using the retracting operation.
  • a mechanical pencil having a mechanism is disclosed in the following prior art documents.
  • the vertical protrusions and the vertical grooves are alternately arranged in the shaft cylinder, and the cam portion having the inclined surface is formed in an annular shape so as to straddle them.
  • a rotor in which protrusions are intermittently formed in the circumferential direction is accommodated in the shaft cylinder.
  • the rotor is pushed up by largely retreating the writing core, and the protrusion of the rotor rides on the vertical protrusion formed on the cam portion in the shaft cylinder, and falls into the adjacent vertical groove through the inclined surface.
  • the rotator is rotated by use, and the rotational movement of the rotator is transmitted to the lead case to rotate the writing lead.
  • This utilizes a known karn knock mechanism that is frequently used in knock type ballpoint pens and the like.
  • first and second cam surfaces are formed on each end surface of the rotor formed in a cylindrical shape, and the first cam surface is caused by a retreating operation of the rotor by writing pressure. Are brought into contact with and meshed with the first fixed cam surface. The second cam surface is brought into contact with and meshed with the second fixed cam surface by the forward movement of the rotor by releasing the writing pressure.
  • the reciprocal meshing of the cams causes the rotor to rotate sequentially in one direction, and this rotational motion is transmitted to the writing core via a chuck that grips the writing core. Yes.
  • the lead is accompanied by the cushioning action described above, so that the feel of the "sticky” is attached in the retracting action of the writing lead, and the writing action of the writing lead by the cushion spring is "Kachikacha". The feeling to do also occurs.
  • an adhesive medium (adhesive medium) is formed between the movable member that moves in the axial direction together with the writing core and the fixed member that faces the moving surface of the movable member.
  • the present applicant has already proposed a mechanical pencil in which a damper function is added to the cushioning motion of the writing core by interposing an adhesive grease. This is disclosed in the aforementioned Japanese Patent Application No. 2007-339075 (International Publication WO2009 / 84446).
  • the present invention has been made paying attention to the above-mentioned specific problems in the mechanical pencil equipped with the rotation driving mechanism of the writing core, and even if a rotary relay pipe having a long dimension is used, the various factors described above are used. It is a first object to provide a mechanical pencil that can overcome the obstacles arising from the above and can guarantee a normal rotational driving operation of the writing core.
  • adhesive grease that provides a damper function for the cushioning operation of the writing core is applied to the peripheral surface of the torque canceller as the movable member described above, and the torque canceller in this state is attached to the cylindrical stopper member that is a fixed member. It is assembled by mounting along the inner peripheral surface.
  • the torque canceller is mounted along the inner peripheral surface of the stopper member even if the same amount of adhesive grease is always adhered to the peripheral surface of the torque canceller. In such a case, there is a problem that the amount of grease filled between the two changes due to a slight difference in how they are assembled.
  • the amount of adhesive grease filled in the gap between the torque canceller and the stopper member is not stable, and there is no guarantee that the adhesive grease is filled over the entire area of the gap between the two. Therefore, there is a problem that the damper function is likely to vary and the function is not stable.
  • the present invention has been made by paying attention to the above-mentioned problem of the damper function in a mechanical pencil equipped with a rotation driving mechanism for a writing core, and it is easy to perform the filling operation of adhesive grease without requiring any skill. It is a second object to provide a mechanical pencil that can stably and reliably fill the gap between the two with no stickiness and does not cause variations in the damper function.
  • the mechanical pencil according to the present invention which has been made to solve the first problem described above, releases and grips the writing core by moving the chuck back and forth based on the knocking operation of the knocking member, and feeds the writing core forward.
  • a mechanical pencil housed in the shaft cylinder so that the chuck can move back and forth and rotate around the axis while holding the writing core A rotational drive mechanism capable of converting a reciprocating motion in a direction into a rotational motion is housed in the shaft tube, and the rotational drive mechanism and the chuck are connected via a relay member formed of a flexible material.
  • the relay member When the relay member is connected and the back-and-forth motion based on the writing pressure applied to the writing core held by the chuck is transmitted to the rotary drive mechanism as a reciprocating motion by the relay member.
  • the rotary motion generated by the rotation driving mechanism so as to transmit to the chuck.
  • the relay member is coaxially disposed outside the core case connected to the rear end of the chuck.
  • a rotor to which the relay member is connected is provided, and the rotor is formed in an annular shape with first and second end surfaces in the axial direction thereof being connected to the first and second end surfaces.
  • Second cam surfaces are respectively formed, and first and second fixed cam surfaces are provided so as to face the first and second cam surfaces, respectively, and the chuck is retracted by the writing pressure.
  • the first cam surface of the annular rotor is brought into contact with and meshed with the first fixed cam surface, and the second cam surface of the rotor becomes the second fixed by releasing the writing pressure.
  • the first cam surface on the rotor side is engaged with the first fixed cam surface and the second cam surface on the rotor side and the second cam surface on the rotor side in a state where the first cam surface on the rotor side is engaged with the first fixed cam surface.
  • the second fixed cam surface is the shaft In the state where the phase is shifted with respect to one tooth of the cam in the direction, and the second cam surface on the rotor side is engaged with the second fixed cam surface, the first on the rotor side is set.
  • the cam surface and the first fixed cam surface are set so as to be out of phase with respect to one tooth of the cam in the axial direction.
  • the rotary drive mechanism has a cushion that urges the second cam surface of the rotor to abutment with the second fixed cam surface when the writing pressure is released.
  • a spring is provided.
  • a torque canceller that generates a slip between the rear end portion of the rotor and the rear end portion of the rotor is interposed between the rear end portion of the rotor and the cushion spring in the rotation drive mechanism.
  • the rotor is configured to prevent the rotational motion of the rotor from being transmitted to the cushion spring.
  • the mechanical pencil according to the present invention releases and grips the writing core by moving the chuck back and forth based on the knocking operation of the knocking member, and moves the writing core forward.
  • the writing core is housed in a shaft cylinder so as to be able to move forward and backward and rotate around the shaft core in a state where the chuck grips the writing core, and the writing pressure of the writing core
  • the mechanical pencil includes a rotation drive mechanism that rotationally drives the writing core held by the chuck, and based on the back-and-forth movement of the chuck by the writing pressure of the writing core,
  • An adhesive medium is interposed between a movable member moving in the axial direction and a fixed member facing the moving surface of the movable member, and the writing is performed by the adhesive medium.
  • a damper function is provided for the backward and forward movements of the fixed member, and the fixed member and the side wall of the fixed member have the movable member at a first relative position with respect to the fixed member.
  • a space portion communicating with the injection hole is formed between the movable member and the injection member by the movable member in a state where the movable member is at a second relative position with respect to the fixed member. In the state where the hole and the space are blocked, the space is substantially sealed, and the movable member is at the third relative position with respect to the fixed member, the volume of the space that is substantially sealed is It is configured to be reduced.
  • the fixed member is configured by a cylindrical member that slidably supports the movable member by arranging the movable member on the inside, and the movable member has a groove portion continuous along an outer peripheral surface.
  • the adhesive medium stored in the space portion is interposed between the movable member and the fixed member via the groove portion. It is configured to be able to enter the gap.
  • the groove portion formed in the movable member is formed between the fixed member and the movable member. It is desirable that the two spaces be communicated with each other.
  • the torque canceller can be used as the movable member that moves in the axial direction together with the chuck, and the torque canceller can be configured to also serve as a part of the damper function.
  • a rotation drive mechanism for rotating the rotor by receiving the writing pressure, and the rotational movement of the rotor is transmitted to the writing core via the chuck. Therefore, since the writing core is gradually rotated with the writing operation, it is possible to prevent the writing core from being unevenly worn as the writing progresses, and the thickness of the drawn line and the density of the drawn line greatly change. Can be eliminated.
  • the rotation driving mechanism and the chuck that grips the writing core are connected by a relay pipe that functions as a relay member formed of a flexible material. Since the configuration is adopted, even if a relay pipe having a long dimension is used, the flexible characteristic of the relay pipe can be utilized to ensure the normal rotational driving operation of the writing core.
  • the damper function by the adhesive medium is applied to the back and forth movement of the chuck by receiving the writing pressure, and the damper function is the first of the movable member with respect to the fixed member.
  • a series of operations are performed in which the adhesive medium is uniformly filled into the gap between the adhesive medium injection into the injection hole.
  • FIG. 10 is a cross-sectional view as viewed in the direction of the arrow from the aa, bb, and cc lines in FIG. It is the perspective view of the rotor which changed the angle and showed the structural example of the display part which displays the rotation state of a rotor. It is an external view of the mechanical pencil concerning this invention which shows the rotation state of a rotor. It is sectional drawing explaining the final assembly process of a rotational drive mechanism. It is sectional drawing explaining the assembly process following FIG. It is sectional drawing explaining the assembly process following FIG.
  • FIG. 1 and FIG. 2 are sectional views showing the entire configuration.
  • FIG. 1 shows the first half of the mechanical pencil
  • FIG. 2 shows the second half.
  • the same portions are denoted by the same reference numerals, but in the overall views shown in FIGS. 1 and 2, the representative portions are denoted by the reference numerals.
  • a mouth end portion (cutipula) indicated by reference numeral 1 is detachably attached by being screwed to a tip end portion of a tip shaft 2 constituting a shaft cylinder formed of a metal material.
  • the cylindrical core case 3 is coaxially accommodated along the center part of the front axis
  • a short shaft core case joint 4 is attached to the tip of the core case 3, and a brass chuck 5 is connected through the core case joint 4.
  • a writing core hole (not shown) is formed along the axis of the chuck 5, the tip is divided into a plurality of pieces, and the divided tip is formed into a ring shape by brass. It is loosely fitted in the tool 6.
  • the ring-shaped fastener 6 is mounted on the inner surface of a pipe joint 7 arranged so as to cover the periphery of the chuck 5.
  • a cylindrical slider 8 is attached to the front end portion of the pipe joint 7 so that the front end portion of the pipe joint 7 is accommodated in the front end portion 1 and protrudes from the front end portion.
  • the tip pipe 9 which guides is attached.
  • a rubber holding chuck 10 having a through hole formed in the shaft core portion as shown in FIG. 3 is accommodated on the inner surface of the slider 8.
  • a linear core insertion hole reaching the tip pipe 9 is formed through a through hole formed in the chuck 5 from the core case 3 and a through hole formed in the shaft core of the holding chuck 10.
  • a writing core (not shown) is inserted into the linear core insertion hole.
  • a coiled chuck spring 11 is disposed between the pipe joint 7 and the core case joint 4.
  • the rear end portion of the chuck spring 11 is accommodated in the state of contact with the front end surface of the core case joint 4, and the front end portion of the chuck spring 11 is in contact with an annular member formed on the inner peripheral surface of the pipe joint 7. Has been. Therefore, the chuck 5 is urged by the action of the chuck spring 11 in the retreating direction, that is, in the direction of gripping the writing core.
  • the lead case 4 moves forward in the shaft cylinder by knocking a knock member (knock bar) described later.
  • knock bar knock member
  • the large diameter portion formed on the slider 8 abuts against the inner surface of the lip portion 1 to prevent the forward movement, so that the tip portion of the chuck 5 protrudes relatively from the fastener 6, and writing by the chuck 5 is performed.
  • the gripping state of the lead is released.
  • the knocking operation is released, the lead case 3 and the chuck 5 are retracted in the shaft cylinder by the action of the chuck spring 11.
  • the writing core is held by friction in a through hole formed in the holding chuck 10, and in this state, the chuck 5 is retracted and its tip is accommodated in the fastener 6.
  • the core is again held. That is, the chuck 5 is moved back and forth by repeated knocking operation of a knock bar, which will be described later, whereby the writing core is released and gripped, and the writing core acts so as to be sequentially advanced forward from the chuck 5.
  • a grip member 13 is mounted on the front shaft 2 constituting the shaft cylinder so as to surround the front shaft 2. As shown in detail in FIG. 4, the grip member 13 is mounted between the metal shaft coupling 14 fitted to the rear end portion of the front shaft 2 and the above-described mouth portion 1.
  • the grip member 13 is composed of an inner layer 13b formed of a rubber material and a coating layer 13a formed of the same rubber material, and a gel-like substance is filled between the two as necessary. Has been made.
  • a synthetic resin shaft ornament 15 is fitted so as to cover the flange 14 a formed at the front end portion of the shaft coupling 14, and the rear end portion of the grip member 13 is covered with the shaft ornament 15. It is installed as shown.
  • a helical screw is formed on the outer peripheral surface of the shaft coupling 14, and the rear shaft 17 constituting the shaft cylinder is screwed and attached using this screw as shown in FIG.
  • An outer shaft 18 in which a clip portion 18a is integrally formed is attached so as to cover the outer side of the rear shaft 17.
  • the outer shaft 18 is a retaining ring screwed to the rear end portion of the rear shaft 17. 19 is attached so as to be sandwiched between the shaft decoration 15 and the shaft decoration 15.
  • the relatively thick grip member 13 is mounted on the front shaft 2 side, so that the rotation driving mechanism 21 of the writing core has the grip member 13 as shown in FIG. It is arranged between the rear shaft 17 and the core case 3 which are behind the mounting position.
  • the rotation drive mechanism 21 will be described in detail later, it is configured by a single unit independent of the mechanical pencil body and is accommodated in the shaft cylinder.
  • the rotary drive mechanism 21 unitized so that it can be used as a general-purpose product has a pipe member (hereinafter also referred to as a relay pipe) that functions as a relay member formed of a flexible material as shown in FIG. .) 22 is connected to the rear end, and the front end of the relay pipe 22 is connected to the pipe joint 7 that supports the chuck 5.
  • a pipe member hereinafter also referred to as a relay pipe
  • a relay pipe that functions as a relay member formed of a flexible material as shown in FIG. .
  • the relay pipe 22 is coaxially arranged so as to cover the core case 3, and the relay pipe 22 performs a retraction and forward movement (cushion movement) of the writing core based on the writing movement. And the rotational motion by the rotational drive mechanism 21 generated by the cushion operation is transmitted to the pipe joint 7 and the chuck 5 via the relay pipe 22.
  • the rotary drive mechanism 21 is urged rearward by a shaft spring 24 interposed between the shaft coupling 14 and the front end portion thereof.
  • the rear end portion of the rotary drive mechanism 21 is in contact with the stepped portion 17 a formed by the reduced diameter in the rear shaft 17 by the urging force of the shaft spring 24.
  • the rotation drive mechanism 21 that is unitized is restricted from rotating by friction due to contact with the stepped portion 17a in the rear shaft 17, and the rotation drive mechanism generated by the cushion operation described above. It acts to transmit the rotational motion by 21 to the chuck 5 side.
  • the mounting of the rotation drive mechanism 21 in the shaft tube is not limited to the above-described configuration, and the rotation drive mechanism 21 may be mounted on a part of the shaft tube by, for example, fitting means.
  • FIG. 5 is an enlarged view of the structure of the rotary drive mechanism 21.
  • the rotary drive mechanism 21 includes a rotor 26 formed in a cylindrical shape, and the relay pipe 22 is fitted to the inner peripheral surface of the rotor 26 at the front end portion of the rotary drive mechanism 21. Are combined.
  • the rotor 26 has a large-diameter portion with a slightly larger diameter near the front end, and a first cam surface 26a is formed on one end surface (rear end surface) of the large-diameter portion.
  • a second cam surface 26b is formed on the other end surface (front end surface).
  • a cylindrical upper cam forming member 27 is disposed so as to be rotatable with respect to the rotor 26 so as to cover the rear end side of the rotor 26.
  • a cylindrical lower cam forming member 28 is fitted and attached to the outer periphery of the front end.
  • a fixed cam surface (also referred to as a first fixed cam surface) 27a is formed on the front end surface of the upper cam forming member 27 facing the first cam surface 26a of the rotor 26.
  • a fixed cam surface (also referred to as a second fixed cam surface) 28a is formed on the inner surface of the front end portion of the lower cam forming member 28 facing the second cam surface 26b of the rotor 26.
  • the cylinder member 30 is fitted on the rear end portion side of the upper cam forming member 27 described above, and the insertion hole 30 a into which the core case 3 can be inserted into the rear end portion of the cylinder member 30. Is formed.
  • a torque canceller 31 that is formed in a cylindrical shape and is movable in the axial direction is disposed in the cylinder member 30. Between the front end of the inner peripheral surface of the torque canceller 31 and the rear end of the inner peripheral surface of the cylinder member 30.
  • a coiled cushion spring 32 is attached to the.
  • the cushion spring 32 acts to urge the torque canceller 31 forward, and is pushed by the torque canceller 31 receiving the urging force, so that the rotor 26 acts forward.
  • the rotational drive mechanism 21 in this embodiment has a central portion that is a space portion through which the lead case 3 passes and is isolated from the lead case 3, and is constituted by the members 26 to 32 described above. It is united as a unit.
  • the rotor 26 can rotate around the shaft core together with the chuck 5 via the relay pipe 22 in a state where the chuck 5 holds the writing core.
  • the rotor 26 is biased forward via the torque canceller 31 by the action of the cushion spring 32.
  • FIGS. 7 (D) and (E) explain the basic operation of the rotation drive mechanism 21 that rotates the rotor 26 by the above-described operation in order.
  • reference numeral 26 schematically shows the above-described rotor, and one end surface (the upper surface in the drawing) is continuously serrated along the circumferential direction.
  • the first cam surface 26a is formed in an annular shape.
  • a second cam surface 26b that is continuously serrated along the circumferential direction is formed in an annular shape on the other end surface (the lower surface in the drawing) of the rotor 26.
  • the first fixed cam surface 27a continuously formed in a sawtooth shape along the circumferential direction is also formed on the annular end surface of the upper cam forming member 27,
  • a second fixed cam surface 28 a that is continuously serrated along the circumferential direction is also formed on the annular end surface of the lower cam forming member 28.
  • the cam surfaces formed in a sawtooth shape along the circumferential direction of the two fixed cam surfaces 28a are formed so that their pitches are substantially the same. 6 and 7, the circles drawn at the center of the rotor 26 indicate the rotational movement state of the rotor 26.
  • FIG. 6A shows the relationship among the upper cam forming member 27, the rotor 26, and the lower cam forming member 28 when the mechanical pencil is not used (in the case other than the writing state).
  • the second cam surface 26b formed on the rotor 26 is brought into contact with the second fixed cam surface 28a side of the lower cam forming member 28 by the urging force of the cushion spring 32 shown in FIG. Has been.
  • the first cam surface 26a on the rotor 26 side and the first fixed cam surface 27a are set so as to have a half-phase (half-pitch) offset from one cam tooth in the axial direction. ing.
  • FIG. 6B shows an initial state in which the writing pressure is applied to the writing core by using the mechanical pencil.
  • the rotor 26 retracts in the axial direction by contracting the cushion spring 32 via the chuck 5 and the relay pipe 22. Thereby, the rotor 26 moves to the upper cam forming member 27 side.
  • FIG. 6C shows a state in which the writing pressure is applied to the writing core by using the mechanical pencil, and the rotor 26 is in contact with the upper cam forming member 27 side.
  • the rotor 26 is formed on the rotor 26.
  • the first cam surface 26a meshes with the first fixed cam surface 27a on the upper cam forming member 27 side.
  • the rotor 26 receives a rotational drive corresponding to a half phase (half pitch) of one tooth of the first cam surface 26a.
  • the second cam surface 26b on the rotor 26 side and the second fixed cam surface 28a are half phase (half pitch) with respect to one tooth of the cam in the axial direction. It is set to be in a shifted relationship.
  • FIG. 7D shows an initial state in which the writing with the mechanical pencil is finished and the writing pressure on the writing core is released.
  • the rotor 26 is moved by the action of the cushion spring 32 described above. Advance in the axial direction. Thereby, the rotor 26 moves to the lower cam forming member 28 side.
  • FIG. 7E shows a state in which the rotor 26 is in contact with the lower cam forming member 28 side by the action of the cushion spring 32 described above.
  • the second formed on the rotor 26 is shown.
  • the cam surface 26b meshes with the second fixed cam surface 28a on the lower cam forming member 28 side.
  • the rotor 26 again receives a rotational drive corresponding to a half phase (half pitch) of one tooth of the second cam surface 26b.
  • the rotor 26 has the first and second cam surfaces 26a,
  • the writing core held by this via the relay pipe 22, the pipe joint 7 and the chuck 5 is also rotationally driven in the same manner by receiving rotational driving corresponding to one tooth (1 pitch) of 26 b.
  • the rotor 26 receives the rotational motion corresponding to one tooth of the cam each time by the reciprocating motion of the rotor 26 in the axial direction by writing, and this rotation is sequentially rotated in one direction.
  • the Accordingly, the writing core is also sequentially rotated. Therefore, it is possible to prevent the writing core from being unevenly worn as the writing progresses, and it is possible to solve the problem that the thickness of the drawn line and the darkness of the drawn line change greatly.
  • the tip pipe 9 and the slider 8 for guiding the writing core operate integrally with the rotor 26 via the pipe joint 7 and the relay pipe 22.
  • the tip pipe 9 and the slider 8 move in the same direction via the relay pipe 22.
  • the tip pipe 9 that guides the writing core also moves in the same direction, so that the axial direction between the tip pipe 9 and the writing core is axial. Relative movement does not occur, and the lead-out dimension of the writing core from the tip pipe 9 can be kept constant.
  • the tip pipe 9 and the slider 8 are coupled to the rotor 26 via the relay pipe 22, the tip pipe 9 and the slider 8 are similarly subjected to rotational movement when the writing core is subjected to rotational movement. As a result, the tip pipe 9 and the writing core rotate together.
  • the mechanical pencil having the above-described configuration it is possible to solve the problem that the writing dimension of the writing core from the tip pipe 9 changes each time during writing and gives a sense of incongruity. Furthermore, the change in the protruding dimension of the writing core from the tip pipe 9 can prevent the core from being broken by cutting the core with the tip pipe, and also eliminates the problem of contaminating the writing surface by scraping the core. be able to.
  • the cylindrical torque canceller 31 that pushes the rotor 26 forward by receiving the biasing force of the coiled cushion spring 32 is between the front end face of the torque canceller 31 and the rear end face of the rotor 26. By causing slipping, it acts to prevent the rotational movement of the rotor 26 caused by repeated writing action from being transmitted to the cushion spring 32.
  • the torque canceller 31 is interposed between the rotor 26 and the cushion spring 32, thereby preventing the rotational motion of the rotor 26 from being transmitted to the spring 32 due to the sliding action described above.
  • the problem that the rotating operation of the rotor 26 is obstructed can be solved by generating the twisting return (spring torque) of the spring 32.
  • an adhesive medium preferably adhesive grease (not shown) is interposed between the peripheral side surface of the torque canceller 31 and the inner peripheral surface of the cylinder member 30, so that the cylinder member 30. It is desirable that the torque canceller 31 that moves in the axial direction has a damper effect.
  • adhesive grease injection holes 30b are formed at positions facing the 180 degrees of the side wall of the cylinder member 30, respectively. And when the adhesive grease is injected into the torque canceller 31 side through the injection hole 30b, the convex member 31a which seals the grease and spreads the grease over the entire peripheral side surface of the torque canceller 31 and A groove 31b is formed.
  • FIGS. 8A and 8C are cross-sectional views of the torque canceller 31 cut at positions orthogonal to each other in the circumferential direction. is there.
  • a convex member 31 a is formed at approximately the center position of the torque canceller 31 that faces 180 degrees on the peripheral side surface. Further, immediately after the axial direction adjacent to the convex member 31a of the torque canceller 31, a groove portion 31b that is continuous along the circumferential direction is formed. Further, a circumferential side surface orthogonal to the convex member 31a of the torque canceller 31 is formed with a face-grooving portion 31c processed into a flat shape in the axial direction.
  • FIG. 9 illustrates the order in which the torque canceller 31 having the above-described configuration is inserted into the cylinder member 30 and the adhesive grease is injected using the injection hole 30b of the cylinder member 30. That is, on the inner peripheral surface of the cylinder member 30, a concave portion 30c that accommodates the pair of convex members 31a in the torque canceller 31 is formed so as to communicate with the injection hole 30b along the axial direction. Has been.
  • FIG. 9A shows the positional relationship between the two when the adhesive grease is injected using the injection hole 30 b of the cylinder member 30.
  • FIG. 10A shows a cross-sectional view taken along line aa in FIG. That is, in this state, the convex member 31 a in the torque canceller 31 is positioned in front of the injection hole 30 b formed in the cylinder member 30. In this state, the tip of the nozzle (not shown) is inserted into the injection hole 30b, and the adhesive grease is injected. Thereby, the grease is stored in the concave portion 30 c of the cylinder member 30.
  • FIG. 9B shows a state where the torque canceller 31 is slightly pushed into the cylinder member 30 after the adhesive grease is injected, and is a cross-sectional view taken in the direction of the arrow from the line bb in FIG. 9B. Is shown in FIG. In this state, since the convex member 31a in the torque canceller 31 moves rearward from the injection hole 30b of the cylinder member 30, the injection hole 30B formed in the cylinder member 30 and the concave portion 30c in the cylinder member 30 are provided. Is blocked by the convex member 31a of the torque canceller 31, and the concave portion 30c is hermetically sealed. Thereby, the inside of the concave part 30c is made into a grease reservoir of adhesive grease.
  • FIG. 9C shows a state where the torque canceller 31 is further pushed into the cylinder member 30, and a cross-sectional view taken in the direction of the arrow from the line cc in FIG. 9C is shown in FIG. C).
  • the adhesive grease in the concave portion 30c enclosed in the grease reservoir receives the pressing pressure by the torque canceller 31, and the volume is reduced. Therefore, the adhesive grease enters the groove portion 31b formed in the torque canceller 31. .
  • the adhesive grease enters the circumferential side surface of the torque canceller 31 through the groove portion 31b, that is, a slight gap between the torque canceller 31 and the cylinder member 30, and spreads evenly between the two.
  • the adhesive grease preferably has a consistency of 100 to 400.
  • Examples of the adhesive grease include the product name “Shin-Etsu Silicone Grease” manufactured by Shin-Etsu Chemical Co., Ltd., product number: G330. To 334, G340 to 342, G351 to 353, G631 to 633, etc. can be suitably used.
  • the damper function when the torque canceller moves forward by releasing the writing pressure, the damper function can be effectively provided, and the poor feeling of writing caused by the cushion operation described above can be effectively performed. Can be corrected.
  • it is possible to easily inject and apply the adhesive grease that performs the damper function and it is also possible to make the amount of adhesive grease applied to the portion that performs the damper function uniform. Therefore, it is possible to extremely reduce the variation in the damper characteristics.
  • the cylinder member 30 is formed with a pair of injection holes 30b and a concave portion 30c, while the torque canceller 31 is formed with a pair of convex members 31a. This is a pair for the convenience of the adhesive grease injection and coating operation, and each of these can be formed to perform its function.
  • a knock bar 35 as a knock member is slidably attached to the rear shaft 17 in the rear end portion of the inner shaft 17 described above, and between the rear shaft 17 and the knock bar 35.
  • a return spring 36 of a knock bar is disposed in the space portion.
  • An abutting portion 35 a having a writing core replenishing hole is formed slightly closer to the rear end than the center of the knock bar 35.
  • An eraser 37 is detachably attached to the rear end portion of the knock bar 35, and a knock cover 38 covering the eraser 37 is detachably attached to the peripheral surface of the rear end portion of the knock bar 35.
  • the abutting portion 35a of the knock bar 35 and the rear end portion of the core case 3 are opposed to each other with a predetermined distance. That is, the core case 3 is separated from the knock bar 35 at the interval without being mechanically connected to the knock bar 35.
  • the abutting portion 35a formed on the knock bar 35 and the rear end portion of the core case 3 are opposed to each other with a predetermined interval. Even if the shaft slightly retracts, the rear end portion of the lead case 3 does not collide with the contact portion 35a of the knock bar 35, and it is possible to prevent the rotation operation by the rotation drive mechanism 21 from being obstructed. .
  • FIG. 11 and FIG. 12 show an example in which it is possible to display a state in which the rotor 26 in the rotary drive mechanism 21 is rotating in accordance with the writing operation. That is, FIGS. 11A and 11B are perspective views showing the configuration of the rotor 26 described above at different angles.
  • the rotor 26 is preferably formed of a white resin material.
  • the large-diameter portion of the rotor 26 on which the first cam surface 26a and the second cam surface 26b are formed has a periphery thereof.
  • a black display portion 26c is formed at a position opposite to the side surface. That is, white and black display portions 26c are formed at intervals of 90 degrees along the circumferential direction of the large diameter portion.
  • FIGS. 12A and 12B show the appearance of a mechanical pencil so that the black and white display portion 26c applied to the rotor 26 can be seen through from the outside.
  • the configuration is shown.
  • the display portion 26c in black and white is displayed through the window portion 20 formed in a round shape
  • (A) shows the state in the display portion 26c as the rotor 26 rotates.
  • a state where the boundary between white and black is displayed on the window 20 is shown.
  • (B) has shown a mode that the black part in the display part 26c was displayed on the window part 20 with the further rotation of the rotor 26.
  • the configuration described above includes the lower cam forming member 28 of the rotation drive mechanism 21 shown in FIG. 5 that covers the outside of the rotor 26, the rear shaft 17 shown in FIG. 2 located outside the rotation drive mechanism 21, and the rear shaft 17.
  • Each of the outer shafts 18 covering the outer side of each of the outer shafts 18 is formed of a light-transmitting resin, and for example, the peripheral side surface of the rear shaft 17 is subjected to a coating process while leaving the round-shaped window portion 20 described above. Can do.
  • the first and second cams formed on the rotor 26 by receiving the writing pressure and reciprocating in the axial direction (cushion operation) as described above.
  • the surfaces 26a and 26b are alternately meshed with the first and second fixed cam surfaces 27a and 28a, and the writing core is rotationally driven.
  • the first on the rotor side is in the middle of the backward movement of the rotor 26 by the writing pressure and in the middle of the forward movement of the rotor 26 by the release of the writing pressure.
  • the second cam surfaces 26a and 26b are separated from the first and second fixed cam surfaces 27a and 28a, respectively, and the moment when the rotor 26 becomes free in the rotational direction occurs.
  • the rotor 26 may fall into a defective rotating operation due to a slight external force or vibration. That is, it has been confirmed in the inventors' trial production and verification results that the rotor-side cam teeth do not get on the fixed-side next cam teeth shifted by a half pitch. Therefore, it is expected that the writing core becomes non-rotatable by the above-described phenomenon continuing.
  • FIGS. 13 to 15 illustrate examples of countermeasures, and as shown in FIGS. 8 to 10, a damper function using adhesive grease is formed between the cylinder member 30 and the torque canceller 31. FIG. After that, it is executed when the rotary drive mechanism 21 is assembled.
  • FIG. 13 shows a final assembly process of the rotary drive mechanism 21 in which the upper cam forming member 27 is fitted into the cylinder member 30, and the cylinder of the rotor 26 accommodated in the upper cam forming member 27.
  • Adhesive grease G is applied to the body part along the circumferential direction.
  • the adhesive grease G is applied to the opening of the cylinder member 30 and the upper cam forming member. 27 is confined in a space formed between the two ends.
  • the adhesive grease G can be obtained by assembling the rotary drive mechanism 21 by fitting the end circumferential surface of the upper cam forming member 27 to the inner surface of the opening of the cylinder member 30. It enters between the forming member 27 and the cylindrical portion of the rotor 26. Thereby, viscous resistance is provided to the rotor 26 in the rotation direction by the adhesive grease G.
  • the rotor 26 is given a slight viscous resistance in the rotation direction by the adhesive grease G. Therefore, as described above, the rotor 26 receives vibration or the like at the moment when the rotor 26 becomes free in the rotation direction. Also, the rotor 26 is held by the adhesive grease G. Further, when the first or second cam surface of the rotor 26 meshes with the first or second fixed cam surface, the rotation is not affected.
  • the relatively thick grip member is attached to the shaft cylinder, so that the rotation driving mechanism 21 of the writing core is located in the rear shaft 17 that is behind the attachment position of the grip member.
  • the rotation drive mechanism 21 is connected to the chuck 5 via a relay pipe 22.
  • the relay pipe 22 having a relatively long dimension is employed as in this example, the relay pipe 22 is preferably formed of a flexible material such as polypropylene as described above together with the core case 3.
  • the mechanical pencil according to the present invention exhibits a particularly remarkable effect when a relatively long relay pipe is employed as shown in the embodiment. Even when it is adopted, the same effects can be enjoyed although the degree is small.

Landscapes

  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)

Abstract

L'invention concerne un porte-mine configuré de manière à permettre la sortie vers l'avant d'une mine d'écriture, la libération et la retenue de ladite mine d'écriture étant assurées par des déplacements avant / arrière d'un mandrin (5) sur la base de mouvements par à-coups d'un élément à à-coups, et ledit mandrin est logé à l'intérieur d'un tube d'axe dans un état dans lequel ladite mine d'écriture est retenue et de manière à permettre un déplacement avant / arrière et une rotation ayant pour centre une mine axiale. Un mécanisme d'entraînement rotatif (21) permettant de modifier une action de va-et-vient dans la direction de l'axe en action de rotation, est logé à l'intérieur du tube d'axe. Ledit mécanisme d'entraînement rotatif (21) et ledit mandrin (5) sont raccordés par un cylindre intermédiaire (22) formé à partir d'un matériau souple tel qu'un polypropylène, ou similaire. Ainsi, même si certaines erreurs d'assemblage se produisent dans la partie d'entraînement rotatif de la mine d'écriture qui inclut le mécanisme d'entraînement rotatif, il est possible de garantir une bonne opération d'entraînement rotatif de la mine d'écriture.
PCT/JP2010/006939 2009-12-03 2010-11-29 Porte-mine WO2011067913A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201080053881.3A CN102648098B (zh) 2009-12-03 2010-11-29 自动铅笔
HK13101791.4A HK1174591A1 (en) 2009-12-03 2013-02-08 Mechanical pencil

Applications Claiming Priority (4)

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JP2009275429A JP5215283B2 (ja) 2009-12-03 2009-12-03 シャープペンシル
JP2009-275429 2009-12-03
JP2009275428A JP5215282B2 (ja) 2009-12-03 2009-12-03 シャープペンシル
JP2009-275428 2009-12-03

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WO2011067913A1 true WO2011067913A1 (fr) 2011-06-09

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CN (1) CN102648098B (fr)
HK (1) HK1174591A1 (fr)
TW (1) TWI516383B (fr)
WO (1) WO2011067913A1 (fr)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
JP2014030916A (ja) * 2012-08-01 2014-02-20 Mitsubishi Pencil Co Ltd シャープペンシル
EP3988322A4 (fr) * 2019-06-20 2023-07-26 Kabushiki Kaisha Pilot Corporation (also trading as Pilot Corporation) Portemine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI598778B (zh) * 2017-01-06 2017-09-11 立邁科技股份有限公司 主動式電容墨水觸控筆、雙頭筆裝置及電容式觸控筆操作系統

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JPS59107286U (ja) * 1983-01-11 1984-07-19 日本電気株式会社 自動芯回転機構付シヤ−プペンシル
WO2007142135A1 (fr) * 2006-06-05 2007-12-13 Mitsubishi Pencil Co., Ltd. Crayon mécanique
JP2009233921A (ja) * 2008-03-26 2009-10-15 Mitsubishi Pencil Co Ltd シャープペンシル

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JP3882272B2 (ja) * 1997-05-30 2007-02-14 ぺんてる株式会社 シャ−プペンシル
JP3885315B2 (ja) * 1997-09-29 2007-02-21 ぺんてる株式会社 シャ−プペンシル
CN101835626B (zh) * 2007-10-26 2012-02-01 三菱铅笔株式会社 自动铅笔
JP4847946B2 (ja) * 2007-12-28 2011-12-28 三菱鉛筆株式会社 シャープペンシル

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
JPS59107286U (ja) * 1983-01-11 1984-07-19 日本電気株式会社 自動芯回転機構付シヤ−プペンシル
WO2007142135A1 (fr) * 2006-06-05 2007-12-13 Mitsubishi Pencil Co., Ltd. Crayon mécanique
JP2009233921A (ja) * 2008-03-26 2009-10-15 Mitsubishi Pencil Co Ltd シャープペンシル

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014030916A (ja) * 2012-08-01 2014-02-20 Mitsubishi Pencil Co Ltd シャープペンシル
EP3988322A4 (fr) * 2019-06-20 2023-07-26 Kabushiki Kaisha Pilot Corporation (also trading as Pilot Corporation) Portemine
US11993097B2 (en) 2019-06-20 2024-05-28 Kabushiki Kaisha Pilot Corporation Mechanical pencil

Also Published As

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CN102648098A (zh) 2012-08-22
HK1174591A1 (en) 2013-06-14
TW201139161A (en) 2011-11-16
TWI516383B (zh) 2016-01-11
CN102648098B (zh) 2014-12-31

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