WO2017188353A1 - シャープペンシル - Google Patents
シャープペンシル Download PDFInfo
- Publication number
- WO2017188353A1 WO2017188353A1 PCT/JP2017/016650 JP2017016650W WO2017188353A1 WO 2017188353 A1 WO2017188353 A1 WO 2017188353A1 JP 2017016650 W JP2017016650 W JP 2017016650W WO 2017188353 A1 WO2017188353 A1 WO 2017188353A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sleeve
- chuck
- shaft cylinder
- mechanical pencil
- writing core
- Prior art date
- Legal status (The legal status 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 status listed.)
- Ceased
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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
- B43K21/16—Writing-core feeding mechanisms with stepwise feed of writing-cores
- B43K21/20—Writing-core feeding mechanisms with stepwise feed of writing-cores with writing-cores automatically replaced from magazines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K21/00—Propelling pencils
-
- 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
- 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
- B43K21/00—Propelling pencils
- B43K21/02—Writing-core feeding mechanisms
- B43K21/22—Writing-cores gripping means, e.g. chucks
Definitions
- the present invention relates to a mechanical pencil provided with a chuck for gripping a writing core and capable of feeding out the writing core by a knocking operation.
- a mechanical pencil that is configured to be housed in a substantially cylindrical sleeve and held in a shaft cylinder with respect to a chuck mechanism that includes a chuck and feeds a writing core by a knock operation.
- a cushion spring is disposed behind the sleeve. The sleeve is urged forward in the axial direction by the cushion spring. Then, when an excessive writing pressure is applied to the writing core during writing of the mechanical pencil, the sleeve moves rearward in the axial direction against the urging force of the cushion spring. In this way, the bending of the writing core during writing is reduced.
- JP-A-50-138932 see, for example, page 2, lower right column, lines 1-8, page 3, left column, lines 16-18.
- Patent Document 1 can prevent the core breakage of the writing core due to excessive writing pressure at the time of writing.
- a broken core may occur when an external impact is applied to the mechanical pencil. Therefore, it has been desired to provide a mechanical pencil having impact resistance.
- An object of the present invention is to provide a mechanical pencil capable of preventing the writing core from breaking when an external impact is applied to the mechanical pencil.
- a shaft tube a cushion spring housed in the shaft tube, a cushion spring having a rear end supported by the shaft tube, and a sleeve housed in the shaft tube
- the axial direction of the axial cylinder is urged toward the axial direction forward by the cushion spring and elastically supported by the cushion spring from the outside of the axial cylinder.
- a writing core pipe for storing a writing core stored in the shaft cylinder the chuck being fitted to the chuck and the chuck
- FIG. 1 is a view showing the appearance of the mechanical pencil 1.
- the mechanical pencil 1 is a knock type mechanical pencil in which the writing core T is drawn out by knocking the knock button 5.
- the mechanical pencil 1 includes a shaft cylinder 2 formed in a substantially cylindrical shape.
- the front side of the shaft tube 2 is formed by two-color molding of a recess 2a and a projection 2b formed of a relatively hard primary molding material and a grip 3 formed of a relatively soft secondary molding material.
- a convex portion 2b formed of a relatively hard primary molding material is exposed from a substantially long rectangular hole portion 3a extending in the front-rear direction of the grip 3 formed of a relatively soft secondary molding material.
- a front end 4 is fixed to the front end of the shaft tube 2. From the front end of the front end 4, a tip pipe 30 from which the writing core T projects from the tip opening projects so as to be housed.
- a tail plug 6 is inserted into the rear end of the shaft tube 2 and fixed.
- a knock button 5 is disposed at the rear end of the tail plug 6. When the knock button 5 is knocked, the writing core T is fed out from the tip opening of the tip pipe 30.
- a clip 7 is attached to the outer peripheral surface of the tail plug 6.
- FIG. 2 is a longitudinal sectional view showing the mechanical pencil 1 cut in the longitudinal direction.
- FIG. 3 is a partially enlarged longitudinal sectional view showing the mechanical pencil 1 in a longitudinal direction by enlarging the front side portion and the rear side portion thereof.
- a writing core pipe 21 extending in the front-rear direction is accommodated in the shaft cylinder 2.
- a knock button 5 is detachably attached to the rear end of the writing core pipe 21.
- the knock button 5 is attached to the knock button main body 5a so as to cover the knock button main body 5a fitted to the outer peripheral surface of the rear end of the writing core pipe 21, the eraser 5b held by the knock button main body 5a, and the eraser 5b.
- Knock cap 5c Knock cap 5c.
- the knock cap 5c and the eraser 5b are removed from the knock button body 5a. Then, the writing core T is replenished into the writing core pipe 21 from behind through the core insertion hole 5a1 formed in the knock button body 5a.
- the knock button 5 is guided by the tail plug 6 so as to be movable in the direction of the axis L, and is attached in a restricted state so as not to move in the direction perpendicular to the direction of the axis L.
- the rear end of the chuck 22 is fitted and fixed to the front end of the writing core pipe 21.
- Three slits are formed at the tip of the chuck 22 in three circumferential directions, and the three chuck pieces are elastically deformed and restored, respectively, so that the writing core T can be grasped and released.
- a chuck ring 23 is assembled to the outer periphery of the tip portion of the chuck 22 so as to be detachable from the rear.
- a substantially cylindrical sleeve 24 moves in the direction of the axis L and in the direction perpendicular to the direction of the axis L, as will be described in detail later. Can be assembled as possible.
- the sleeve 24 prevents an impact applied from the outside of the mechanical pencil 1 from being transmitted to the chuck 22 and the writing core T, and at least part of the energy of the impact is a contact sliding portion. It is comprised so that it may lose
- the mechanical pencil 1 and the chuck mechanism 20 of the present embodiment will be described in detail with reference mainly to FIG.
- the inner peripheral surface of the sleeve 24 is separated from the outer peripheral surface of the writing core pipe 21 with a slight clearance as shown in the figure, and is configured to be relatively movable in the axis L direction and the direction orthogonal to the axis L direction. Is done.
- the inner peripheral surface of the rear end portion of the sleeve 24 comes into contact with and slides on the outer peripheral surface of the writing core pipe 21.
- the sleeve 24 is movable in a direction perpendicular to the axis L direction, and a direction perpendicular to the axis L direction by a portion (first contact sliding portion) where the writing core pipe 21 and the sleeve 24 slide in contact with each other.
- the movement of the sleeve 24 is suppressed by contact sliding (friction sliding).
- the rear end of the sleeve 24 comes into contact with the outer periphery of the writing core pipe 21 more strongly than the other parts. Therefore, in the present embodiment, the rear end of the sleeve 24 comes into contact with the outer periphery of the writing core pipe 21 at a position rearward in the axis L direction from the rear end of the chuck 22 fitted in the writing core pipe 21. Projecting backward. If comprised in this way, it can prevent that the impact applied to the mechanical pencil 1 from the outside is transmitted to the chuck
- the energy of the impact transmitted to the writing core pipe 21 is a relatively long writing that is sandwiched between both supporting ends of the front end that contacts the sleeve 24 of the writing core pipe 21 and the rear end that is fitted to the knock button 5. Since it is consumed (disappears) due to vibrations in the middle part of the core pipe 21, it is difficult to transmit to the chuck 22.
- the intermediate portion of the writing core pipe 21 is vibrated by, for example, a vibration mode that is deformed like a bow, and the impact applied to the mechanical pencil 1 from the outside disappears.
- an annular protruding portion 24b is formed to protrude radially inward.
- the rear surface of the chuck ring 23 is brought into contact with the front surface of the protruding portion 24b.
- the tip of the protruding portion 24 b (the inner peripheral surface of the sleeve 24) is sufficiently separated in the radial direction of the sleeve 24 so as not to contact the outer peripheral surface of the chuck 22.
- the front end of the chuck spring 26 is supported while being in contact with the rear surface of the protruding portion 24 b of the sleeve 24.
- the rear end of the chuck spring 26 is supported while being in contact with the front end surface of the writing core pipe 21.
- the chuck spring 26 urges the writing core pipe 21, the chuck 22 fixed to the writing core pipe 21, and the chuck ring 23 fitted to and detached from the chuck 22 toward the sleeve 24 toward the rear in the axis L direction.
- the outer periphery of the chuck spring 26 is in contact with the inner peripheral surface of the sleeve 24 to constitute a part of the contact sliding portion (second contact sliding portion).
- the sleeve 24 moves in a direction perpendicular to the direction of the axis L
- the sleeve 24 slides in a state where the outer periphery of the chuck spring 26 and the inner peripheral surface of the sleeve 24 are in contact with each other.
- annular projecting portion 24a On the outer peripheral surface of the front portion of the sleeve 24, an annular projecting portion 24a is formed to project radially outward.
- annular projecting portion 2 c On the inner peripheral surface of the shaft tube 2, an annular projecting portion 2 c is formed projecting radially inward so as to face the projecting portion 24 a of the sleeve in the axial direction.
- the cushion spring 25 is supported with its front end in the axis L direction in contact with the projecting portion 24a of the sleeve, and its rear end is supported in contact with the projecting portion 2c of the shaft cylinder. In this way, the cushion spring 25 is disposed so as to extend in the direction of the axis L between the sleeve 24 and the shaft tube 2. The sleeve 24 is urged forward by the cushion spring 25.
- the tip (in other words, the inner peripheral end) protruding radially inward of the protruding portion 2c of the shaft cylinder 2 and the outer peripheral surface of the sleeve 24 are configured to be separated from each other with a predetermined clearance in the radial direction. Further, the tip (in other words, the outer peripheral end) protruding outward in the radial direction of the protruding portion 24a of the sleeve 24 and the inner peripheral surface of the shaft cylinder 2 are configured to be separated from each other with a predetermined clearance in the radial direction. . Further, the outer periphery of the cushion spring 25 and the inner peripheral surface of the shaft cylinder 2 are configured to be separated from each other with a predetermined clearance in the radial direction.
- the sleeve 24 accommodated in the shaft cylinder 2 is urged toward the front in the direction of the axis L by the cushion spring 25 and is elastically supported, and an impact is applied from the outside of the shaft cylinder 2.
- it can move by a predetermined movement amount (movement distance) in a direction orthogonal to the direction of the axis L.
- the sleeve 24 is elastically supported by the cushion spring 25 with respect to the shaft cylinder 2, at least a part of the energy of impact applied from the outside of the shaft cylinder 2 is used. It can be absorbed by the elasticity of the cushion spring 25.
- the rear end of the sleeve 24 is disposed so as to protrude to a position behind the protruding portion 2c of the shaft tube 2 in the axis L direction.
- the radial clearance between the tip of the protrusion 2c and the outer peripheral surface of the sleeve 24 can be preferably configured as a predetermined interval.
- the predetermined clearance preferably allows the sleeve 24 to be greatly moved in a direction perpendicular to the direction of the axis L with a movement amount (movement distance) as large as possible.
- the predetermined clearance in the radial direction between the tip of the protruding portion 2c of the shaft cylinder and the outer peripheral surface of the sleeve 24 is preferably a clearance of 10% or more of the wire diameter of the cushion spring 25, more preferably 30% or more. Most preferably, the clearance is 50% or more.
- the inner periphery of the cushion spring 25 of the present embodiment is in contact with the outer peripheral surface of the sleeve 24 and constitutes another part of the contact sliding portion (third contact sliding portion).
- third contact sliding portion By suppressing the movement of the sleeve 24 in the direction orthogonal to the direction of the axis L by the third contact sliding portion by contact sliding (friction sliding), at least one of the energy of the impact applied from the outside of the mechanical pencil 1 is obtained. Part can be lost. For this reason, the broken core of the writing core T can be prevented.
- the writing core T of the mechanical pencil is a brittle material that easily breaks.
- the configuration in which the movement of the sleeve 24 by the predetermined allowable movement amount in the direction orthogonal to the axis L direction is suppressed by contact sliding is the core of the writing core T. It is important to prevent breakage.
- the rear part of the tip 4 is formed in a double cylinder shape having an inner cylinder 4a.
- the outer peripheral surface of the inner cylinder 4a and the inner peripheral surface of the shaft cylinder 2 are sufficiently separated so as not to directly contact each other.
- a predetermined clearance is provided between the inner peripheral surface of the inner cylinder 4a and the outer peripheral surface of the sleeve 24.
- the sleeve 24 is in the direction of the axis L. It is comprised so that it can move to the orthogonal direction.
- the writing core T of the mechanical pencil 1 is most likely to break the core at the tip portion (position near the tip surface) of the chuck 22 that holds the writing core T.
- the sleeve 24 moves in the direction orthogonal to the direction of the axis L, the allowable amount of movement of the sleeve 24 approaches the tip of the chuck 22 so that the writing core T is not broken. It is preferable to configure the movement amount to be small.
- the predetermined clearance is preferably configured to increase in proportion to the distance from the tip of the chuck 22 in the axis L direction.
- the predetermined clearance between the inner peripheral surface of the inner cylinder 4 a at the front end and the outer peripheral surface of the sleeve 24 is configured to be smaller than the predetermined clearance between the shaft cylinder 2 and the sleeve 24 described above. .
- a plurality of ribs 4a1 extending in the direction of the axis L are formed on the inner peripheral surface of the inner cylinder 4a of the tip 4 in the circumferential direction.
- the front end surface of the sleeve 24 abuts against the rear end surface of the rib 4a1 while being urged forward by the cushion spring 25.
- the front end surface of the sleeve 24 and the rear end surface of the rib 4a1 are in contact with each other to form another part of the contact sliding portion (fourth contact sliding portion).
- “suppression” means that the sleeve 24 is allowed to move, while acting to give a load (resistance) to the movement of the sleeve 24.
- a step portion 4a2 that can contact when the front end surface of the chuck ring 23 moves forward is formed at a substantially central position in the axis L direction of the rib 4a1.
- the chuck ring 23 comes into contact with the step portion 4a2 of the rib 4a1 formed in the inner cylinder of the tip 4, the chuck ring 23 is detached from the chuck 22 and the writing core T is released from gripping by the chuck 22. Is done.
- a series of feeding operations of the mechanical pencil 1 will be described in detail later.
- a female screw portion 4b1 is formed on the inner peripheral surface of the outer cylinder 4b formed in a double cylinder shape at the rear end portion of the front end 4. Further, a male screw portion 2 d corresponding to the female screw portion 4 b 1 of the tip 4 is formed on the outer peripheral surface of the tip portion of the shaft tube 2. The female screw portion 4b1 and the male screw portion 2d are screwed together, and the tip 4 is fixed to the shaft tube 2.
- a guide pipe 31 is disposed at a position in front of the front end face of the chuck 22 so as to be movable in the direction of the axis L.
- the guide pipe 31 includes a disc-shaped base end portion 31b, a center hole through which the writing core T is inserted in the direction of the axis L, and a plurality of insertions formed to protrude forward from the base end portion 31b around the center hole.
- Leg 31a The distal end of the insertion leg 31a is formed in a bowl shape as shown in the figure, and is engaged with a slit 32a formed in the core holder 32, which will be described in detail later. It is movably locked.
- a step portion is formed on the outer peripheral edge of the base end portion 31 b of the guide pipe 31.
- a step portion on the inner periphery of the front end 4 is formed on the inner peripheral surface of the front end 4 that faces the step portion of the base end portion 31 b of the guide pipe 31 in the axis L direction.
- a return that is a compression coil spring that urges the guide pipe 31 toward the rear in the direction of the axis L with respect to the front end 4 between the proximal end portion 31b of the guide pipe 31 and the step portion on the inner periphery of the front end 4.
- a spring 36 is arranged.
- the rear end surface of the base end portion 31 b of the guide pipe 31 approaches the front end surface of the chuck 22 from the front.
- the rear end surface of the guide pipe 31 comes into contact with the front end surface of the chuck 22 from the front.
- the rear end surface of the guide pipe 31 supports the writing core T protruding from the front end surface of the chuck 22 in a direction perpendicular to the direction of the axis L while being in proximity to or in contact with the front end surface of the chuck 22.
- a core holder 32 is disposed at a position in front of the guide pipe 31 so as to be movable in the direction of the axis L.
- the lead holder 32 is formed with a plurality of slits 32a extending in the front-rear direction.
- the tip of the insertion leg 31a of the guide pipe 31 described above is slidably engaged with the slit 32a.
- the guide pipe 31 is locked to the lead holder 32 so as to be relatively movable in the front-rear direction.
- the core holder 32 is formed with a central hole through which the writing core T is inserted in the direction of the axis L.
- a holding portion that holds the writing core T sandwiched radially inward is formed at the tip of the center hole of the core holder 32.
- the lead holder 32 is inserted into the above-described tip pipe 30 from the rear and assembled to the tip pipe 30.
- a flange is formed at the rear end of the tip pipe 30.
- An O-ring 38 that elastically supports the tip pipe 30 and the core holder 32 in a direction orthogonal to the direction of the axis L is assembled to the outer periphery of the collar portion.
- the O-ring 38 is configured to provide appropriate sliding resistance against the movement of the tip pipe 30 and the core holder 32 in the front-rear direction.
- the appropriate sliding resistance refers to sliding resistance that can hold the tip pipe 30 and the core holder 32 so that the drawn writing core T can be held in the direction of the axis L.
- the tip pipe 30 protrudes from the tip 4 or the tip pipe 30 is stored in the tip 4.
- it refers to the sliding resistance that allows the movement of the tip pipe 30 and the core holder 32.
- the outer periphery of the O-ring 38 is pressed in an elastically deformed state on the inner peripheral surface of the opening 4 c of the tip 4.
- the guide pipe 31 is retracted by the urging force of the return spring 36.
- the chuck 22 grips the portion at a position behind the writing core T again. In this way, the writing core T is drawn out from the mechanical pencil 1 and protrudes from the tip pipe 30 to be in the state shown in FIGS.
- the mechanical pencil 1 of the present embodiment can absorb excessive writing pressure and prevent core breakage.
- the mechanical pencil 1 of the present embodiment has the writing core T in front of the front end surface of the chuck 22 in the direction orthogonal to the axis L direction by the guide pipe 31, the core holder 32, and the tip pipe 30. By supporting, core breakage can be prevented.
- the mechanical pencil 1 of the present embodiment can protect the writing core T so that the writing core T is not easily broken, as described above, even against an impact from the outside of the mechanical pencil 1 due to dropping or the like. it can.
- the sleeve 24 moves in a direction orthogonal to the direction of the axis L.
- the movement amount that allows the sleeve 24 to move in the direction orthogonal to the axis L direction is a predetermined movement amount allowed by a predetermined clearance so that the writing core T does not break.
- the predetermined clearance is determined to increase as the distance from the front end surface of the chuck 22 in the direction of the axis L is increased. For this reason, the sleeve 24 is moved in the direction of the axis L so that the amount of movement in the direction perpendicular to the direction of the axis L in the rear end is larger than the amount of movement in the direction perpendicular to the direction of the axis L in the front end. The amount of movement in the orthogonal direction is allowed.
- the arrangement position of the protruding portion 24a of the sleeve 24 elastically supported by the cushion spring 25 is the front portion of the sleeve 24 in the axis L direction. It is preferable to arrange
- the protruding portion 24a of the sleeve 24 is preferably disposed in the front half portion of the sleeve 24, more preferably a position at a distance from the front end of the sleeve 24 to 40% of the total length in the axis L direction of the sleeve 24, most preferably It can be arranged at a distance of 30% of the total length of the sleeve 24 from the front end.
- the rear end portion of the sleeve 24 is larger than the front end portion of the sleeve 24 in the axis L direction, with the position where the protruding portion 24a of the sleeve 24 is disposed as the rotation center of rotation of the sleeve 24 in the pitching / yawing direction. It is permissible to move in a direction orthogonal to.
- the rear end portion of the sleeve 24 is preferably configured as a free end that is not supported by the cushion spring 25 or the like. With this configuration, the rear end portion of the sleeve 24 can be freely moved in a direction orthogonal to the direction of the axis L.
- the movement of the sleeve 24 in the direction perpendicular to the direction of the axis L in the range of the allowable movement amount is the contact sliding (first to fourth contact sliding portions) by the contact sliding portion (first to fourth contact sliding portions).
- (Friction sliding) is suppressed.
- at least a part of the energy of impact transmitted from the outside of the mechanical pencil 1 (shaft cylinder 2) to the chuck 22 (writing core T) is consumed by contact sliding (friction sliding) by the contact sliding portion.
- the impact applied from the outside of the mechanical pencil 1 in the direction orthogonal to the axis L direction can be suitably eliminated. For this reason, the broken core of the writing core T can be prevented.
- the friction coefficient in the contact sliding portion is It is good also as what is comprised so that it may become higher compared with another part. Or it is good also as what changes the size and shape of the parts which constitute a contact sliding part, and the pressing force by each spring so that the contact pressure in a contact sliding part may be raised further than showing in this embodiment. In this case, the impact applied to the mechanical pencil from the outside can be eliminated more efficiently.
- the concept of “movement” within the range of a predetermined allowable movement amount (movement distance) of the sleeve caused by receiving an external impact described above is that the elastically supported sleeve receives an external impact.
- This is a concept including the concept of “vibration” within the range of the allowable predetermined amplitude of the sleeve caused by
- the concept of “suppression” by the contact sliding part is a concept including the concept of “vibration attenuation” by the contact sliding part.
- the contact sliding portion may be configured using any one of the first to fourth contact sliding portions or a combination of any two or more.
- the contact sliding portion may be configured to be able to suppress the movement of the sleeve in the direction perpendicular to the axial direction. That's fine.
- the contact sliding portion can be arranged along an arbitrary extending direction. For example, a contact sliding portion extending in a direction having an arbitrary angle with respect to the axial direction of the mechanical pencil contacts the sleeve and slides. It is good also as what arrange
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- Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
Abstract
Description
2a 凹部 2b 凸部
2c 突出部 2d 雄螺子部
3 グリップ 3a 孔部
4 先口 4a 内筒
4a1 リブ 4a2 段部
4b 外筒 4b1 雌螺子部
4c 開口部 5 ノックボタン
5a ノックボタン本体 5a1 芯挿通孔
5b 消しゴム 5c ノックキャップ
6 尾栓 7 クリップ
20 チャック機構 21 筆記芯パイプ
22 チャック 23 チャックリング
24 スリーブ 24a 突出部
24b 突出部 25 クッションスプリング
26 チャックスプリング 30 先端パイプ
31 ガイドパイプ 31a 挿入脚
31b 基端部 32 芯保持具
36 リターンスプリング 38 Oリング
Claims (4)
- 軸筒と、
前記軸筒に収容されたクッションスプリングであって、後端が該軸筒に支持されたクッションスプリングと、
前記軸筒に収容されたスリーブであって、前記クッションスプリングによって該軸筒に対して軸線方向前方に向けて付勢され、該クッションスプリングによって弾性的に支持された状態で該軸筒の外側から加えられる衝撃によって該軸線方向と直交する方向に移動可能なスリーブと、
前記スリーブに収容されたチャックスプリングであって、前端が該スリーブに支持されたチャックスプリングと、
前記軸筒に収容されたチャックであって、筆記芯を把持するチャックと、
前記軸筒に収容された筆記芯を収容する筆記芯パイプであって、前記チャックと嵌合されて該チャックと共に前記チャックスプリングによって前記スリーブに対して軸線方向後方に向けて付勢された筆記芯パイプと、
前記スリーブの前記軸線方向と直交する方向への移動を抑制する接触摺動部と、
を備えたことを特徴とする、シャープペンシル。 - 前記スリーブの後端は、前記チャックの後端よりも前記軸線方向後方に突出し、該スリーブが前記軸筒の外側から加えられる衝撃によって該軸線方向と直交する方向に移動したとき、該スリーブの後端の内周と前記筆記芯パイプの外周とが接触して前記接触摺動部を構成する、請求項1に記載のシャープペンシル。
- 前記スリーブは該スリーブの外周面より径方向外側に突出する突出部を有し、
前記軸筒は該軸筒の内周面より径方向内側に突出する突出部を有し、
前記クッションスプリングは前記軸線方向において前記スリーブの突出部と前記軸筒の突出部との間に配置され、
前記スリーブの突出部の先端と前記軸筒の内周面および該軸筒の突出部の先端と該スリーブの外周面は径方向において各々所定のクリアランスを有して離間された、
請求項1または請求項2に記載のシャープペンシル。 - 前記チャックスプリングの外周は前記スリーブの内周面と接触して前記接触摺動部の一を構成し、
前記クッションスプリングの内周は前記スリーブの外周面と接触して前記接触摺動部の他を構成し、
前記クッションスプリングの外周と前記軸筒の内周面は径方向において所定のクリアランスを有して離間された、
請求項1乃至請求項3のいずれか一項に記載のシャープペンシル。
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020187027808A KR102174751B1 (ko) | 2016-04-27 | 2017-04-27 | 샤프펜슬 |
| EP17789635.4A EP3450197A4 (en) | 2016-04-27 | 2017-04-27 | MECHANICAL PIN |
| CN201780014399.0A CN108698433B (zh) | 2016-04-27 | 2017-04-27 | 活心铅笔 |
| JP2018514685A JP6700381B2 (ja) | 2016-04-27 | 2017-04-27 | シャープペンシル |
| US16/169,876 US10603948B2 (en) | 2016-04-27 | 2018-10-24 | Mechanical pencil |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016-088667 | 2016-04-27 | ||
| JP2016088667 | 2016-04-27 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US16/169,876 Continuation US10603948B2 (en) | 2016-04-27 | 2018-10-24 | Mechanical pencil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2017188353A1 true WO2017188353A1 (ja) | 2017-11-02 |
Family
ID=60160808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2017/016650 Ceased WO2017188353A1 (ja) | 2016-04-27 | 2017-04-27 | シャープペンシル |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US10603948B2 (ja) |
| EP (1) | EP3450197A4 (ja) |
| JP (1) | JP6700381B2 (ja) |
| KR (1) | KR102174751B1 (ja) |
| CN (1) | CN108698433B (ja) |
| WO (1) | WO2017188353A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2024030727A (ja) * | 2022-08-25 | 2024-03-07 | ミクロ株式会社 | クッション式筆記具 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12082674B2 (en) | 2020-05-29 | 2024-09-10 | Gloria M. Moore | Anchor point device for hygienic epilation by threading |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4106874A (en) * | 1976-11-29 | 1978-08-15 | Ancos Co., Ltd. | Mechanical pencil |
| JPS56156689U (ja) * | 1980-04-22 | 1981-11-21 | ||
| JPS6183980U (ja) * | 1984-11-07 | 1986-06-03 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5438930B2 (ja) | 1974-04-23 | 1979-11-24 | ||
| US4205924A (en) * | 1978-11-17 | 1980-06-03 | Pilot Precision Kabushiki Kaisha | Mechanical pencil with lead-feeding device operable by forward shake of pencil |
| US4386865A (en) * | 1979-12-28 | 1983-06-07 | Kotobuki & Co., Ltd. | Automatic sharp pencil |
| JPH0858284A (ja) * | 1994-08-29 | 1996-03-05 | Kotobuki:Kk | シャープペンシル |
| JPH08207489A (ja) * | 1994-12-07 | 1996-08-13 | Kotobuki:Kk | ダブルチャック式シャープペンシル |
| TW356768U (en) * | 1997-03-03 | 1999-04-21 | Kotobuki & Co Ltd | Double-chuck type mechanical pencil |
| JP2001270283A (ja) * | 2000-01-20 | 2001-10-02 | Kotobuki:Kk | ダブルチャック式シャープペンシル及びその内部筆記機構 |
| JP6106015B2 (ja) * | 2013-04-18 | 2017-03-29 | 株式会社パイロットコーポレーション | シャープペンシル |
| JP6236365B2 (ja) * | 2014-08-06 | 2017-11-22 | ゼブラ株式会社 | 鉛芯繰出し機構及びシャープペンシル |
| US9573410B2 (en) * | 2014-08-06 | 2017-02-21 | Zebra Co., Ltd. | Writing utensil |
-
2017
- 2017-04-27 KR KR1020187027808A patent/KR102174751B1/ko not_active Expired - Fee Related
- 2017-04-27 EP EP17789635.4A patent/EP3450197A4/en not_active Withdrawn
- 2017-04-27 WO PCT/JP2017/016650 patent/WO2017188353A1/ja not_active Ceased
- 2017-04-27 CN CN201780014399.0A patent/CN108698433B/zh active Active
- 2017-04-27 JP JP2018514685A patent/JP6700381B2/ja active Active
-
2018
- 2018-10-24 US US16/169,876 patent/US10603948B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4106874A (en) * | 1976-11-29 | 1978-08-15 | Ancos Co., Ltd. | Mechanical pencil |
| JPS56156689U (ja) * | 1980-04-22 | 1981-11-21 | ||
| JPS6183980U (ja) * | 1984-11-07 | 1986-06-03 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP3450197A4 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2024030727A (ja) * | 2022-08-25 | 2024-03-07 | ミクロ株式会社 | クッション式筆記具 |
| JP7792697B2 (ja) | 2022-08-25 | 2025-12-26 | ミクロ株式会社 | クッション式筆記具 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6700381B2 (ja) | 2020-05-27 |
| KR102174751B1 (ko) | 2020-11-05 |
| US10603948B2 (en) | 2020-03-31 |
| KR20180135443A (ko) | 2018-12-20 |
| JPWO2017188353A1 (ja) | 2019-03-22 |
| CN108698433B (zh) | 2020-05-22 |
| CN108698433A (zh) | 2018-10-23 |
| EP3450197A4 (en) | 2019-11-27 |
| US20190054756A1 (en) | 2019-02-21 |
| EP3450197A1 (en) | 2019-03-06 |
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