JP4339076B2 - Intrusive writing instrument - Google Patents

Intrusive writing instrument Download PDF

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JP4339076B2
JP4339076B2 JP2003370561A JP2003370561A JP4339076B2 JP 4339076 B2 JP4339076 B2 JP 4339076B2 JP 2003370561 A JP2003370561 A JP 2003370561A JP 2003370561 A JP2003370561 A JP 2003370561A JP 4339076 B2 JP4339076 B2 JP 4339076B2
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writing instrument
refill
air damper
air
cylinder
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JP2005131942A (en
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茂 大池
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Pilot Ink Co Ltd
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Pilot Ink Co Ltd
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Description

本発明は、出没式筆記具に関する。詳細には、弾発体の後方付勢に抗して前方へ押圧操作することにより筆記具レフィルを前方に移動させ、ペン先を軸筒の先端から突出させ、一方、ペン先突出状態の解除により、筆記具レフィルを後方移動させ、筆記具レフィルのペン先を軸筒内に没入させる出没式筆記具に関する。 The present invention relates to a retractable writing instrument. More specifically, the writing instrument refill is moved forward by pressing forward against the rear urging of the projectile, and the pen tip protrudes from the tip of the barrel, while the pen tip protruding state is released. The present invention relates to a retractable writing instrument that moves the writing instrument refill backward and immerses the pen tip of the writing instrument refill in the shaft cylinder.

従来、この種の出没式筆記具において、例えば、筆記具レフィルが軸筒内に没入する際の衝撃を吸収するものとして、例えば、特許文献１には、筆記具レフィルの後端が衝合するノック部の衝接部に弾性体を設ける構成が開示されている。また、特許文献２には、軸筒とノック体との間に摩擦発生体を設けることが開示されている。 Conventionally, in this kind of retractable writing instrument, for example, as a tool that absorbs the impact when the writing instrument refill is immersed in the shaft tube, for example, Patent Document 1 discloses a knock portion where the rear end of the writing instrument refill collides. The structure which provides an elastic body in the abutting part is disclosed. Further, Patent Document 2 discloses that a friction generating body is provided between the shaft cylinder and the knock body.

前記特許文献１の弾性体によるものは、筆記具レフィルが軸筒内に没入する際、十分に衝撃を吸収することができない。その結果、インキが逆流してペン先より空気が混入し、筆跡がかすれるおそれがある。また、特許文献２の摩擦発生体によるものは、製造時の寸法ばらつきや、筆記使用する環境（例えば温度や湿度）の変化により、一定の摩擦抵抗（即ち一定の衝撃吸収性能）を得ることが困難である。
特許第３１９７４４４号 特許第２５５１８１０号 According to the elastic body disclosed in Patent Document 1, when the writing instrument refill is immersed in the shaft tube, the impact cannot be sufficiently absorbed. As a result, the ink flows backward and air is mixed in from the pen tip, and the handwriting may be faded. Moreover, the thing by the friction generating body of patent document 2 can obtain fixed friction resistance (namely, fixed impact absorption performance) by the dimensional dispersion | variation at the time of manufacture, and the change of the environment (for example, temperature and humidity) used for writing. Have difficulty.
Japanese Patent No. 3197444 Japanese Patent No. 25551810

本発明は前記従来の問題点を解決するものであって、筆記具レフィルの没入時の衝撃を十分に吸収することができ、しかも、製造ばらつきや使用環境の変化によっても一定の衝撃吸収性能が得られる出没式筆記具を提供しようとするものである。 The present invention solves the above-mentioned conventional problems, can sufficiently absorb the impact when the writing instrument refill is immersed, and also obtains a certain shock absorption performance due to manufacturing variations and changes in the use environment. It is intended to provide an in / out type writing instrument.

〔１〕本発明は、軸筒２内に筆記具レフィル３を前後方向に移動可能に収容し、前記筆記具レフィル３を弾発体４により後方付勢し、軸筒２外面より突出する押圧部５１を前方へ押圧操作することにより、前記弾発体４の後方付勢に抗して筆記具レフィル３を前方に移動させ、筆記具レフィル３のペン先を軸筒２の先端から突出させ、一方、ペン先突出状態の解除により、筆記具レフィル３を後方移動させ、筆記具レフィル３のペン先を軸筒２内に没入させる出没式筆記具１であって、ペン先没入時の筆記具レフィル３の後方移動のスピードを抑えるエアダンパー機構６を軸筒２内に設け、前記エアダンパー機構６が、筆記具レフィル３後方の軸筒２内に設けられる容積可変のエアダンパー空間７と、前記エアダンパー空間７の内部と外部との間を空気流通させる空気孔８とからなり、筆記具レフィル３の後方移動に伴い前記エアダンパー空間７の容積が減少し、前記エアダンパー空間７の内圧が一時的に上昇してなること（請求項１）を要件とする。 [1] In the present invention, the writing instrument refill 3 is accommodated in the shaft cylinder 2 so as to be movable in the front-rear direction, and the writing instrument refill 3 is urged rearward by the projectile 4 to protrude from the outer surface of the shaft cylinder 2. Is pushed forward to move the writing instrument refill 3 forward against the rear urging of the projectile 4, and the pen tip of the writing instrument refill 3 projects from the tip of the shaft tube 2, while the pen The retractable writing instrument 1 that moves the writing instrument refill 3 backward by releasing the tip protruding state and immerses the pen tip of the writing instrument refill 3 into the shaft cylinder 2, and the speed of the backward movement of the writing instrument refill 3 when the pen tip is immersed. An air damper mechanism 6 is provided in the shaft cylinder 2, and the air damper mechanism 6 includes a variable volume air damper space 7 provided in the shaft cylinder 2 behind the writing instrument refill 3, and the interior of the air damper space 7. With outside During the consist air hole 8 which is an air flow, reduces the volume of the air damper space 7 with the rearward movement of the writing instrument refill 3, the internal pressure of the air damper space 7 is temporarily increased (claim 1) is a requirement.

〔２〕前記請求項１の出没式筆記具１において、軸筒２内に、筆記具レフィル３の後端に当接し且つ前記押圧部５１と連動する摺動部材５を収容し、前記エアダンパー空間７が、前記摺動部材５に形成されたピストン部７２と、前記軸筒２内に形成され、前記ピストン部７２が密接摺動するシリンダー部７１とからなること（請求項２）が好ましい。 [2] The slide type writing instrument 1 of the claims 1, into the barrel 2, to accommodate the sliding member 5 in conjunction with a contact and the pressing portion 51 to the rear end of the writing instrument refill 3, the air damper space 7 but with the slide member 5 a piston portion 72 formed on, formed in said barrel 2, wherein the piston section 72 consists of a cylinder unit 71. closely slide (claim 2) is preferred.

請求項１により、筆記具レフィルの没入時の衝撃を十分に吸収することができ、しかも、製造ばらつきや使用環境の変化によっても一定の衝撃吸収性能が得られる。 According to the first aspect, it is possible to sufficiently absorb the impact when the writing instrument refill is immersed, and a certain impact absorbing performance can be obtained due to manufacturing variations and changes in the use environment.

請求項１により、エアダンパー空間を軸筒内部に簡易な構造により容易に設けることができる。 According to the first aspect , the air damper space can be easily provided in the shaft cylinder with a simple structure.

請求項２により、エアダンパー空間を設けるための部品点数の増加を抑えることができる。 According to claim 2 , an increase in the number of parts for providing the air damper space can be suppressed.

本発明を実施するための最良の形態を、以下、図面に従って説明する。 The best mode for carrying out the present invention will be described below with reference to the drawings.

図１に本発明の第１実施例を示す。
本実施例の出没式筆記具１は、軸筒２と、軸筒２内に前後方向に移動可能に収容した筆記具レフィル３と、軸筒２内の前部に収容され、前記筆記具レフィル３を後方付勢する弾発体４と、軸筒２内の後部に収容され、前記筆記具レフィル３とともに前後方向に移動可能な摺動部材５とからなる。 FIG. 1 shows a first embodiment of the present invention.
The retractable writing instrument 1 of the present embodiment is housed in a shaft tube 2, a writing tool refill 3 movably accommodated in the shaft tube 2, and a front part in the shaft tube 2, and the writing tool refill 3 is rearward. It consists of a projecting body 4 to be urged and a sliding member 5 which is accommodated in the rear part of the shaft cylinder 2 and is movable in the front-rear direction together with the writing instrument refill 3.

軸筒２の先端には先端孔２１が貫設され、前記先端孔２１より筆記具レフィル３のペン先３１が突出される。また、前記軸筒２の後端には、後端孔２２が貫設され、前記後端孔２２より押圧部５１が突出される。また、軸筒２の側壁には、係止孔２３が貫設され、前記係止孔２３に、摺動部材５の係止部５２が係止される。 A tip hole 21 is provided at the tip of the shaft tube 2, and a pen tip 31 of the writing instrument refill 3 projects from the tip hole 21. In addition, a rear end hole 22 is provided at the rear end of the shaft cylinder 2, and a pressing portion 51 projects from the rear end hole 22. Further, a locking hole 23 is provided in the side wall of the shaft tube 2, and the locking portion 52 of the sliding member 5 is locked in the locking hole 23.

筆記具レフィル３は、ボールペンレフィル、マーキングペンレフィル等、いずれであってもよい。本実施例では、先端にボールを回転可能に抱持したボールペンチップよりなるペン先３１と、該ペン先３１が先端部に取り付けられ、内部にインキと該インキの消費に伴い前進する追従体とを収容したインキ収容筒とからなるボールペンレフィルが採用される。 The writing instrument refill 3 may be any of a ballpoint pen refill, a marking pen refill, and the like. In this embodiment, a pen nib 31 composed of a ballpoint pen tip that rotatably holds a ball at the tip, and a follower that is attached to the tip of the pen tip 31 and moves forward as the ink is consumed. A ballpoint pen refill consisting of an ink containing cylinder containing the ink is employed.

前記弾発体４は、圧縮コイルスプリングよりなる。前記弾発体４の先端は、軸筒２の先端部内壁に係止されるとともに、後端が筆記具レフィル３外面の段部に係止される。 The projectile 4 is composed of a compression coil spring. The front end of the elastic body 4 is locked to the inner wall of the front end of the shaft tube 2, and the rear end is locked to the stepped portion on the outer surface of the writing instrument refill 3.

前記摺動部材５は、軸方向に空気孔８が貫設された鍔状のピストン部７２と、前記ピストン部７２の後面より後方に突出する棒状の押圧部５１と、前記ピストン部７２前面より前方に突出する支持部５３と、該支持部５３より径方向外方に延設され、弾性変形可能な係止部５２とからなる樹脂成形体である。前記ピストン部７２の外周面は、軸筒２の内周面（シリンダー部７１の内周面）と軸方向に密接摺動される。前記係止部５２は、軸筒２の係止孔２３に係止されるとともに、前記係止孔２３より外部へ僅かに突出される。前記支持部５３は、筆記具レフィル３の後端と当接される。前記摺動部材５及び前記筆記具レフィル３は、軸筒２内において弾発体４により後方に付勢されている。 The sliding member 5 includes a rod-shaped piston portion 72 having an air hole 8 extending in the axial direction, a rod-shaped pressing portion 51 protruding rearward from the rear surface of the piston portion 72, and a front surface of the piston portion 72. This is a resin molded body including a support portion 53 protruding forward and a locking portion 52 that extends radially outward from the support portion 53 and is elastically deformable. The outer peripheral surface of the piston portion 72 is closely slid in the axial direction with the inner peripheral surface of the shaft tube 2 (the inner peripheral surface of the cylinder portion 71). The locking portion 52 is locked in the locking hole 23 of the shaft tube 2 and slightly protrudes outside from the locking hole 23. The support 53 is brought into contact with the rear end of the writing instrument refill 3. The sliding member 5 and the writing instrument refill 3 are urged backward by the projectile 4 in the shaft tube 2.

ペン先没入状態にある出没式筆記具１の押圧部５１を、弾発体４の後方付勢に抗して前方へ押圧操作すると、摺動部材５が前方に移動するとともに、筆記具レフィル３が前方に移動し、軸筒２の先端孔２１から筆記具レフィル３のペン先３１が外部に突出される。その時、摺動部材５の係止部５２が軸筒２の係止孔２３に係止されると同時に、前記係止部５２が外方に弾性変形して係止孔２３から外部に僅かに突出され、前記ペン先突出状態が維持される。 When the pressing portion 51 of the retractable writing instrument 1 in the pen tip immersion state is pressed forward against the rear urging of the projectile 4, the sliding member 5 moves forward and the writing instrument refill 3 moves forward. The pen tip 31 of the writing instrument refill 3 protrudes from the tip hole 21 of the shaft tube 2 to the outside. At that time, the locking portion 52 of the sliding member 5 is locked in the locking hole 23 of the shaft cylinder 2 and at the same time, the locking portion 52 is elastically deformed outward and slightly from the locking hole 23 to the outside. It protrudes and the pen tip protruding state is maintained.

ペン先突出状態にある出没式筆記具１の係止部５２を径方向内方へ押圧操作すると、係止部５２が内方に弾性変形して軸筒２内に没入し、係止孔２３と係止部５２との係止状態が解除される。それとともに、弾発体４の後方付勢により摺動部材５及び筆記具レフィル３が後方移動し、ペン先３１が先端孔２１より軸筒２内に没入される。 When the locking portion 52 of the retractable writing instrument 1 in the pen tip protruding state is pressed inward in the radial direction, the locking portion 52 is elastically deformed inward to be immersed in the shaft tube 2, and the locking hole 23 and The locked state with the locking portion 52 is released. At the same time, the sliding member 5 and the writing instrument refill 3 are moved backward by the rear urging of the projectile 4, and the pen tip 31 is immersed in the shaft tube 2 from the tip hole 21.

エアダンパー機構６は、筆記具レフィル３後方の軸筒２内に設けられる容積可変のエアダンパー空間７と、該エアダンパー空間７の内部と外部との間を空気流通させる空気孔８とからなる。前記エアダンパー空間７は、軸筒２内面と一体に形成されたシリンダー部７１（即ち軸筒２の後端部の周壁及び底壁とからなるシリンダー部７１）と、前記摺動部材５に形成されたピストン部７２とからなる。前記ピストン部７２の外周面は、シリンダー部７１の内周面と密接摺動される。 The air damper mechanism 6 includes a variable volume air damper space 7 provided in the shaft cylinder 2 behind the writing instrument refill 3 and an air hole 8 through which air flows between the inside and the outside of the air damper space 7. The air damper space 7 is formed in the sliding member 5 and the cylinder portion 71 (that is, the cylinder portion 71 including the peripheral wall and the bottom wall of the rear end portion of the shaft tube 2) formed integrally with the inner surface of the shaft tube 2. The piston portion 72 is formed. The outer peripheral surface of the piston portion 72 is in close contact with the inner peripheral surface of the cylinder portion 71.

ペン先没入時、筆記具レフィル３の後方移動に伴い、ピストン部７２が後方に移動し、前記エアダンパー空間７の容積が減少し、一時的にエアダンパー空間７の空気が圧縮され、その圧縮空気が空気孔８を介してエアダンパー空間７の外部へ放出される。前記空気孔８は、エアダンパー空間７の内部から外部への空気流通を抑制できるよう、その大きさが設定される。それにより、筆記具レフィル３の後方移動のスピードが弱められ、筆記具レフィル３のペン先没入時の衝撃を吸収することができる。 When the pen tip is immersed, the piston part 72 moves backward as the writing instrument refill 3 moves backward, the volume of the air damper space 7 decreases, and the air in the air damper space 7 is temporarily compressed. Is discharged to the outside of the air damper space 7 through the air holes 8. The size of the air hole 8 is set so that air flow from the inside of the air damper space 7 to the outside can be suppressed. Thereby, the speed of the backward movement of the writing instrument refill 3 is reduced, and the impact when the writing instrument refill 3 is immersed in the pen tip can be absorbed.

前記エアダンパー機構６により、製造ばらつきや使用環境に影響されないペン先没入時の十分な衝撃吸収性能を得る。また、前記エアダンパー空間７を筆記具レフィル３後方の軸筒２内に設けたことにより、エアダンパー空間７を簡易な構造により容易に設けることができる。もし、エアダンパー空間７を筆記具レフィル３の前方の軸筒２内に設ける場合、構造が複雑となり、製造が容易ではない。また、前記ピストン部７２が摺動部材５と一体に形成されるため、エアダンパー空間７を設けるための部品点数の増加を抑えることができる。さらに、本実施例では、摺動部材５に、押圧部５１及び係止部５２が一体に形成されているため、より一層、部品点数の増加を抑えることができる。 The air damper mechanism 6 provides a sufficient shock absorbing performance when the pen nib is immersed, which is not affected by manufacturing variations or the use environment. Further, by providing the air damper space 7 in the shaft cylinder 2 behind the writing instrument refill 3, the air damper space 7 can be easily provided with a simple structure. If the air damper space 7 is provided in the shaft cylinder 2 in front of the writing instrument refill 3, the structure becomes complicated and the manufacture is not easy. Further, since the piston portion 72 is formed integrally with the sliding member 5, an increase in the number of components for providing the air damper space 7 can be suppressed. Furthermore, in this embodiment, since the pressing portion 51 and the locking portion 52 are integrally formed on the sliding member 5, an increase in the number of parts can be further suppressed.

図２に本発明の第２実施例を示す。
本実施例の出没式筆記具１は、軸筒２と、軸筒２内に前後方向に移動可能に収容した筆記具レフィル３と、軸筒２内の前部に収容され、前記筆記具レフィル３を後方付勢する弾発体４と、軸筒２内の後部に収容され、前記筆記具レフィル３とともに前後方向に移動可能な摺動部材５とからなる。 FIG. 2 shows a second embodiment of the present invention.
The retractable writing instrument 1 of the present embodiment is housed in a shaft tube 2, a writing tool refill 3 movably accommodated in the shaft tube 2, and a front part in the shaft tube 2, and the writing tool refill 3 is rearward. It consists of a projecting body 4 to be urged and a sliding member 5 which is accommodated in the rear part of the shaft cylinder 2 and is movable in the front-rear direction together with the writing instrument refill 3.

軸筒２の先端には先端孔２１が貫設され、前記先端孔２１より筆記具レフィル３のペン先３１が突出される。また、前記軸筒２の後部側壁には、スライド孔２４が貫設され、前記スライド孔２４より径方向外方に押圧部５１が突出される。また、前記スライド孔２４より前方の軸筒２の側壁には、係止孔２３が貫設され、前記係止孔２３に、摺動部材５の係止部５２が係止される。 A tip hole 21 is provided at the tip of the shaft tube 2, and a pen tip 31 of the writing instrument refill 3 projects from the tip hole 21. Further, a slide hole 24 is provided in the rear side wall of the shaft cylinder 2, and a pressing portion 51 protrudes radially outward from the slide hole 24. Further, a locking hole 23 is provided in the side wall of the shaft cylinder 2 in front of the slide hole 24, and the locking portion 52 of the sliding member 5 is locked in the locking hole 23.

筆記具レフィル３は、ボールペンレフィル、マーキングペンレフィル等、いずれであってもよい。本実施例では、先端にボールを回転可能に抱持したボールペンチップよりなるペン先３１と、該ペン先３１が先端部に取り付けられ、内部にインキと該インキの消費に伴い前進する追従体とを収容したインキ収容筒とからなるボールペンレフィルが採用される。 The writing instrument refill 3 may be any of a ballpoint pen refill, a marking pen refill, and the like. In this embodiment, a pen nib 31 composed of a ballpoint pen tip that rotatably holds a ball at the tip, and a follower that is attached to the tip of the pen tip 31 and moves forward as the ink is consumed. A ballpoint pen refill consisting of an ink containing cylinder containing the ink is employed.

前記弾発体４は、圧縮コイルスプリングよりなる。前記弾発体４の先端は、軸筒２の先端部内壁に係止されるとともに、後端が筆記具レフィル３外面の段部に係止される。 The projectile 4 is composed of a compression coil spring. The front end of the elastic body 4 is locked to the inner wall of the front end of the shaft tube 2, and the rear end is locked to the stepped portion on the outer surface of the writing instrument refill 3.

前記摺動部材５は、軸方向に空気孔８が貫設された鍔状のピストン部７２と、前記ピストン部７２の前面より前方に延設される脚片５４と、該脚片５４より径方向外方に突出される押圧部５１と、該押圧部５１より前方の脚片５４より径方向外方に連設される係止部５２と、前記ピストン部７２の前面より前方に延設される支持部５３とからなる樹脂成形体である。前記ピストン部７２の外周面は、軸筒２の内周面（シリンダー部７１の内周面）と軸方向に密接摺動される。前記係止部５２は、軸筒２の係止孔２３に係止されるとともに、前記係止孔２３より外部へ僅かに突出される。前記支持部５３は、筆記具レフィル３の後端と当接される。前記摺動部材５及び前記筆記具レフィル３は、軸筒２内において弾発体４により後方に付勢されている。 The sliding member 5 includes a bowl-shaped piston portion 72 having an air hole 8 extending in the axial direction, a leg piece 54 extending forward from the front surface of the piston portion 72, and a diameter larger than the leg piece 54. A pressing portion 51 protruding outward in the direction, a locking portion 52 provided radially outward from the leg piece 54 in front of the pressing portion 51, and extending forward from the front surface of the piston portion 72. This is a resin molded body comprising the supporting portion 53. The outer peripheral surface of the piston portion 72 is closely slid in the axial direction with the inner peripheral surface of the shaft tube 2 (the inner peripheral surface of the cylinder portion 71). The locking portion 52 is locked in the locking hole 23 of the shaft tube 2 and slightly protrudes outside from the locking hole 23. The support 53 is brought into contact with the rear end of the writing instrument refill 3. The sliding member 5 and the writing instrument refill 3 are urged backward by the projectile 4 in the shaft tube 2.

ペン先没入状態にある出没式筆記具１の押圧部５１を、弾発体４の後方付勢に抗して前方へ押圧操作（スライド操作）すると、摺動部材５が前方に移動するとともに、筆記具レフィル３が前方に移動し、軸筒２の先端孔２１から筆記具レフィル３のペン先３１が外部に突出される。その時、摺動部材５の係止部５２が軸筒２の係止孔２３に係止されると同時に、前記係止部５２が外方に弾性変形して係止孔２３から外部に僅かに突出され、前記ペン先突出状態が維持される。 When the pressing portion 51 of the retractable writing instrument 1 in the pen tip immersion state is pressed forward (sliding operation) against the rear urging of the projectile 4, the sliding member 5 moves forward and the writing instrument The refill 3 moves forward, and the pen tip 31 of the writing instrument refill 3 protrudes from the tip hole 21 of the shaft tube 2 to the outside. At that time, the locking portion 52 of the sliding member 5 is locked in the locking hole 23 of the shaft cylinder 2 and at the same time, the locking portion 52 is elastically deformed outward and slightly from the locking hole 23 to the outside. It protrudes and the pen tip protruding state is maintained.

ペン先突出状態にある出没式筆記具１の係止部５２を径方向内方へ押圧操作すると、係止部５２が内方に弾性変形して軸筒２内に没入し、係止孔２３と係止部５２との係止状態が解除される。それとともに、弾発体４の後方付勢により摺動部材５及び筆記具レフィル３が後方移動し、ペン先３１が先端孔２１より軸筒２内に没入される。 When the locking portion 52 of the retractable writing instrument 1 in the pen tip protruding state is pressed inward in the radial direction, the locking portion 52 is elastically deformed inward to be immersed in the shaft tube 2, and the locking hole 23 and The locked state with the locking portion 52 is released. At the same time, the sliding member 5 and the writing instrument refill 3 are moved backward by the rear urging of the projectile 4, and the pen tip 31 is immersed in the shaft tube 2 from the tip hole 21.

エアダンパー機構６は、筆記具レフィル３後方の軸筒２内に設けられる容積可変のエアダンパー空間７と、該エアダンパー空間７の内部と外部との間を空気流通させる空気孔８とからなる。前記エアダンパー空間７は、軸筒２内面と一体に形成されたシリンダー部７１（即ち軸筒２の後端部の周壁及び底壁とからなるシリンダー部７１）と、前記摺動部材５に形成されたピストン部７２とからなる。前記ピストン部７２の外周面は、シリンダー部７１の内周面と密接摺動される。 The air damper mechanism 6 includes a variable volume air damper space 7 provided in the shaft cylinder 2 behind the writing instrument refill 3 and an air hole 8 through which air flows between the inside and the outside of the air damper space 7. The air damper space 7 is formed in the sliding member 5 and the cylinder portion 71 (that is, the cylinder portion 71 including the peripheral wall and the bottom wall of the rear end portion of the shaft tube 2) formed integrally with the inner surface of the shaft tube 2. The piston portion 72 is formed. The outer peripheral surface of the piston portion 72 is in close contact with the inner peripheral surface of the cylinder portion 71.

ペン先没入時、筆記具レフィル３の後方移動に伴い、ピストン部７２が後方に移動し、前記エアダンパー空間７の容積が減少し、一時的にエアダンパー空間７の空気が圧縮され、その圧縮空気が空気孔８を介してエアダンパー空間７の外部へ放出される。前記空気孔８は、エアダンパー空間７の内部から外部への空気流通を抑制できるよう、その大きさが設定される。それにより、筆記具レフィル３の後方移動のスピードが弱められ、筆記具レフィル３のペン先没入時の衝撃を吸収することができる。 When the pen tip is immersed, the piston part 72 moves backward as the writing instrument refill 3 moves backward, the volume of the air damper space 7 decreases, and the air in the air damper space 7 is temporarily compressed. Is discharged to the outside of the air damper space 7 through the air holes 8. The size of the air hole 8 is set so that air flow from the inside of the air damper space 7 to the outside can be suppressed. Thereby, the speed of the backward movement of the writing instrument refill 3 is reduced, and the impact when the writing instrument refill 3 is immersed in the pen tip can be absorbed.

前記エアダンパー機構６により、製造ばらつきや使用環境に影響されないペン先没入時の十分な衝撃吸収性能を得る。また、前記エアダンパー空間７を筆記具レフィル３後方の軸筒２内に設けたことにより、エアダンパー空間７を簡易な構造により容易に設けることができる。もし、エアダンパー空間７を筆記具レフィル３の前方の軸筒２内に設ける場合、構造が複雑となり、製造が容易ではない。また、前記ピストン部７２が摺動部材５と一体に形成されるため、エアダンパー空間７を設けるための部品点数の増加を抑えることができる。さらに、本実施例では、摺動部材５に、押圧部５１及び係止部５２が一体に形成されているため、より一層、部品点数の増加を抑えることができる。 The air damper mechanism 6 provides a sufficient shock absorbing performance when the pen nib is immersed, which is not affected by manufacturing variations or the use environment. Further, by providing the air damper space 7 in the shaft cylinder 2 behind the writing instrument refill 3, the air damper space 7 can be easily provided with a simple structure. If the air damper space 7 is provided in the shaft cylinder 2 in front of the writing instrument refill 3, the structure becomes complicated and the manufacture is not easy. Further, since the piston portion 72 is formed integrally with the sliding member 5, an increase in the number of components for providing the air damper space 7 can be suppressed. Furthermore, in this embodiment, since the pressing portion 51 and the locking portion 52 are integrally formed on the sliding member 5, an increase in the number of parts can be further suppressed.

尚、本発明で、空気孔８はピストン部７２に設ける構成（実施例１及び実施例２）の他にも、シリンダー部７１に設ける構成でもよいが、外部からエアダンパー空間７への埃の侵入を回避できる点から、ピストン部７２に設ける構成（実施例１及び実施例２）が好ましい。 In the present invention, the air hole 8 may be provided in the cylinder portion 71 in addition to the configuration provided in the piston portion 72 (Example 1 and Example 2), but dust from the outside to the air damper space 7 may be provided. From the viewpoint that intrusion can be avoided, a configuration (Example 1 and Example 2) provided in the piston portion 72 is preferable.

尚、本発明で、シリンダー部７１は、軸筒２と一体に形成する構成（実施例１及び実施例２）の他にも、軸筒２内に取り付けた筒状の別部材により形成する構成でもよい。 In the present invention, the cylinder portion 71 is formed by a separate cylindrical member attached to the shaft cylinder 2 in addition to the structure (the first embodiment and the second embodiment) formed integrally with the shaft cylinder 2. But you can.

尚、本発明で、ピストン部７２を備えた摺動部材５は、押圧部５１と一体に形成する構成（実施例１及び実施例２）の他にも、押圧部５１の前方に配置される、回転カム機構の回転子などの別部材でもよい。 In the present invention, the sliding member 5 including the piston portion 72 is disposed in front of the pressing portion 51 in addition to the configuration (the first embodiment and the second embodiment) formed integrally with the pressing portion 51. Another member such as a rotor of a rotating cam mechanism may be used.

尚、本発明で、軸筒２は、一つの部材で構成されたり、複数の部品（例えば先軸と後軸）により構成してもよい。 In the present invention, the shaft cylinder 2 may be composed of a single member or a plurality of parts (for example, a front shaft and a rear shaft).

本発明の第１実施例を示す縦断面図である。It is a longitudinal cross-sectional view which shows 1st Example of this invention. 本発明の第２実施例を示す縦断面図である。It is a longitudinal cross-sectional view which shows 2nd Example of this invention.

符号の説明Explanation of symbols

１ 出没式筆記具
２ 軸筒
２１ 先端孔
２２ 後端孔
２３ 係止孔
２４ スライド孔
３ 筆記具レフィル（ボールペンレフィル）
３１ ペン先
４ 弾発体
５ 摺動部材
５１ 押圧部
５２ 係止部
５３ 支持部
５４ 脚片
６ エアダンパー機構
７ エアダンパー空間
７１ シリンダー部
７２ ピストン部
８ 空気孔 DESCRIPTION OF SYMBOLS 1 Retractable writing instrument 2 Shaft cylinder 21 Front end hole 22 Rear end hole 23 Locking hole 24 Slide hole 3 Writing instrument refill (ball pen refill)
31 Nib 4 Bullet 5 Sliding member 51 Pressing part 52 Locking part 53 Supporting part 54 Leg piece 6 Air damper mechanism 7 Air damper space 71 Cylinder part 72 Piston part 8 Air hole

Claims (2)

軸筒内に筆記具レフィルを前後方向に移動可能に収容し、前記筆記具レフィルを弾発体により後方付勢し、軸筒外面より突出する押圧部を前方へ押圧操作することにより、前記弾発体の後方付勢に抗して筆記具レフィルを前方に移動させ、筆記具レフィルのペン先を軸筒の先端から突出させ、一方、ペン先突出状態の解除により、筆記具レフィルを後方移動させ、筆記具レフィルのペン先を軸筒内に没入させる出没式筆記具であって、
ペン先没入時の筆記具レフィルの後方移動のスピードを抑えるエアダンパー機構を軸筒内に設け、前記エアダンパー機構が、筆記具レフィル後方の軸筒内に設けられる容積可変のエアダンパー空間と、前記エアダンパー空間の内部と外部との間を空気流通させる空気孔とからなり、筆記具レフィルの後方移動に伴い前記エアダンパー空間の容積が減少し、前記エアダンパー空間の内圧が一時的に上昇してなることを特徴とする出没式筆記具。 The writing tool refill is accommodated in the shaft cylinder so as to be movable in the front-rear direction, the writing tool refill is urged rearward by an elastic body, and the pressing portion protruding from the outer surface of the axial cylinder is operated forward to thereby press the elastic body. The writing tool refill is moved forward against the rear bias of the writing tool, the pen tip of the writing tool refill is projected from the tip of the shaft tube, and the writing tool refill is moved backward by releasing the pen tip protruding state. A retractable writing instrument that immerses the nib into the shaft,
An air damper mechanism is provided in the shaft cylinder that suppresses the speed of rearward movement of the writing instrument refill when the pen tip is immersed , and the air damper mechanism includes a variable volume air damper space provided in the shaft cylinder behind the writing instrument refill, and the air It consists of air holes that allow air to flow between the inside and outside of the damper space, and the volume of the air damper space decreases as the writing instrument refill moves backward, and the internal pressure of the air damper space temporarily rises. An in / out type writing instrument characterized by that. 軸筒内に、筆記具レフィルの後端に当接し且つ前記押圧部と連動する摺動部材を収容し、前記エアダンパー空間が、前記摺動部材に形成されたピストン部と、前記軸筒内に形成され、前記ピストン部が密接摺動するシリンダー部とからなる請求項１記載の出没式筆記具。 A sliding member that contacts the rear end of the writing instrument refill and interlocks with the pressing portion is accommodated in the shaft cylinder, and the air damper space is formed in the piston portion formed in the sliding member, and in the shaft cylinder. The retractable writing instrument according to claim 1 , wherein the pendant is formed and a cylinder part in which the piston part slides closely .
JP2003370561A 2003-10-30 2003-10-30 Intrusive writing instrument Expired - Fee Related JP4339076B2 (en)

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KR101228001B1 (en) * 2006-01-19 2013-02-01 제브라 가부시키가이샤 Knock-type writing instruement
JP4716377B2 (en) * 2007-01-23 2011-07-06 三菱鉛筆株式会社 Writing instrument
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KR101538275B1 (en) * 2014-11-18 2015-07-22 천광주 Slide type writing tools having push lock system
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