JP2016172359A - Writing instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a writing instrument which can be easily and securely switched between a writing state and a non-writing state.SOLUTION: A writing instrument 1 includes: a barrel 2; a writing body 6 movably arranged in the barrel 2; a pressing member 10 arranged on a side surface of the barrel 2; an engagement part 35 which is engaged with the writing body 6 in an axial direction and restricts movement of the writing body 6; and an elastic member 50 arranged in the barrel 2 in a position opposite to the pressing member 10. When the pressing member 10 is pressed along a radial direction, engagement of the engagement part 35 is released and the writing body 6 can be moved by gravity, and also the elastic member 50 is compressed in the radial direction. When pressing force is released, the engagement part 35 engages with the writing body 6 by restoring force of the elastic member 50.SELECTED DRAWING: Figure 5

Description

本発明は、筆記具に関する。   The present invention relates to a writing instrument.

筆記体（リフィル）の自重を利用して、ペン先である筆記部が軸筒の先端から突出した筆記状態と筆記部が軸筒内に没入した非筆記状態とを切り替え可能な筆記具が公知である（特許文献１）。   A writing instrument that can switch between a writing state in which the writing part as a pen tip protrudes from the tip of the shaft cylinder and a non-writing state in which the writing part is immersed in the shaft cylinder by using the weight of the writing body (refill) is known. Yes (Patent Document 1).

特許文献１の第１実施形態及び第２実施形態による筆記具では、リフィルを包囲する板バネ等の弾性部材の弾性力を利用してリフィルを挟持している。したがって、弾性部材の弾性力に抗して押圧部材を軸筒の径方向内側に向かって押圧することによってリフィルの挟持を解除し、筆記状態と非筆記状態との切り替えが可能となる。押圧部材の押圧を解除すると、押圧部材は、弾性部材の弾性力によって元の位置に復帰する。   In the writing instrument according to the first embodiment and the second embodiment of Patent Document 1, the refill is sandwiched by utilizing the elastic force of an elastic member such as a leaf spring surrounding the refill. Therefore, the refill is released by pressing the pressing member against the elastic force of the elastic member toward the inside in the radial direction of the shaft cylinder, and switching between the writing state and the non-writing state is possible. When the pressing of the pressing member is released, the pressing member returns to the original position by the elastic force of the elastic member.

特許文献１の第３実施形態による筆記具では、押圧部材に取り付けられたリング状の係合部材が、リフィルに形成された２つの段部のいずれか一方と係合している。すなわち、第３実施形態による筆記具では、第１実施形態及び第２実施形態による筆記具と異なり、リフィルは挟持ではなく係合によって、筆記状態又は非筆記状態が維持される。軸筒内において、押圧部材の前方には、傾斜面を有し且つスプリングによって後方に付勢されたスライド片が配置されている。   In the writing instrument according to the third embodiment of Patent Document 1, the ring-shaped engaging member attached to the pressing member is engaged with one of the two step portions formed in the refill. That is, in the writing instrument according to the third embodiment, unlike the writing instrument according to the first embodiment and the second embodiment, the refill is maintained in the writing state or the non-writing state by the engagement rather than the pinching. In the shaft cylinder, a slide piece having an inclined surface and urged rearward by a spring is disposed in front of the pressing member.

したがって、スライド片の傾斜面を介したスプリングの付勢力に抗して押圧部材を軸筒の径方向内側に向かって押圧することによってリフィルとの係合を解除し、筆記状態と非筆記状態との切り替えが可能となる。押圧部材の押圧を解除すると、押圧部材は、スライド片の傾斜面を介したスプリングの付勢力によって元の位置に復帰する。   Therefore, the engagement with the refill is released by pressing the pressing member against the urging force of the spring via the inclined surface of the slide piece toward the radially inner side of the shaft tube, and the writing state and the non-writing state Can be switched. When the pressing of the pressing member is released, the pressing member returns to the original position by the biasing force of the spring via the inclined surface of the slide piece.

実開平４−５０２８３号公報Japanese Utility Model Publication No. 4-50283

特許文献１の第１実施形態及び第２実施形態による筆記具では、弾性部材の弾性力による挟持でリフィルの移動を制止する必要があることから、意図しない移動を防止するため強い弾性力が必要となる。その結果、筆記状態と非筆記状態との切り替え時には、挟持を解除するために押圧部材に大きな力を加えなければならない。   In the writing instrument according to the first embodiment and the second embodiment of Patent Document 1, since it is necessary to stop the movement of the refill by clamping by the elastic force of the elastic member, a strong elastic force is required to prevent unintended movement. Become. As a result, when switching between the writing state and the non-writing state, a large force must be applied to the pressing member in order to release the pinching.

特許文献１の第３実施形態による筆記具では、押圧部材が、その後端が軸筒に取り付けられて後端を中心に回動することから、係合部材は円弧状の軌道を描き、リフィルの段部との係合が解除されにくい。また、押圧部材の復帰の際に、スプリングの付勢方向と押圧部材の復帰方向とが直交していることから、押圧部材の前端がスライド片の傾斜面に沿って滑らかにスライドしない場合には、付勢力が押圧部材にうまく伝達せず、押圧部材が復帰の途中で停止してしまう場合がある。すなわち、押圧部材は、元の位置に復帰する直前の位置又は復帰した位置では、スプリングの付勢力が作用しない。その結果、係合部材とリフィルとが係合せず、筆記状態と非筆記状態とを切り替えることができない。   In the writing instrument according to the third embodiment of Patent Document 1, since the pressing member is attached at its rear end to the shaft cylinder and rotates around the rear end, the engaging member draws an arc-shaped track, and the step of refilling is performed. The engagement with the part is difficult to be released. Also, when the pressing member is returned, the spring biasing direction and the pressing member return direction are orthogonal to each other, so that the front end of the pressing member does not slide smoothly along the inclined surface of the slide piece. The urging force may not be transmitted well to the pressing member, and the pressing member may stop during the return. That is, the urging force of the spring does not act on the pressing member at the position immediately before returning to the original position or at the returned position. As a result, the engaging member and the refill are not engaged, and the writing state and the non-writing state cannot be switched.

本発明は、筆記状態と非筆記状態とを簡単且つ確実に切り替えることができる筆記具を提供する。   The present invention provides a writing instrument that can easily and reliably switch between a writing state and a non-writing state.

本発明の一態様によれば、軸筒と、該軸筒内に移動可能に配置された筆記体と、前記軸筒の側面に設けられた押圧部材と、前記筆記体と軸線方向に係合して該筆記体の移動を規制する係合部と、前記押圧部材と対向する位置の前記軸筒内に配置された弾性部材と、を具備する筆記具であって、前記押圧部材を径方向に沿って押圧すると、前記係合部の係合が解除されて前記筆記体が重力によって移動可能となると共に、前記弾性部材が径方向に圧縮され、前記押圧を解放すると、前記弾性部材の復元力によって前記係合部が前記筆記体と係合することを特徴とする筆記具が提供される。   According to one aspect of the present invention, a shaft tube, a writing body movably disposed in the shaft tube, a pressing member provided on a side surface of the shaft tube, and the writing body are engaged in the axial direction. A writing instrument comprising: an engaging portion that restricts the movement of the writing body; and an elastic member that is disposed in the shaft tube at a position facing the pressing member, wherein the pressing member is arranged in the radial direction. When pressed along, the engagement portion is disengaged and the writing body can be moved by gravity, and the elastic member is compressed in the radial direction. When the pressing is released, the restoring force of the elastic member A writing instrument is provided in which the engaging portion engages with the writing body.

また、別の態様によれば、筒状に形成された係合部材をさらに具備し、前記係合部が前記係合部材の内面に設けられていることを特徴とする筆記具が提供される。   Moreover, according to another aspect, the writing instrument characterized by further comprising the engaging member formed in the cylinder shape, and the said engaging part being provided in the inner surface of the said engaging member is provided.

また、別の態様によれば、前記弾性部材が、薄板平板からなるドーム状のスプリングであることを特徴とする筆記具が提供される。   According to another aspect, a writing instrument is provided in which the elastic member is a dome-shaped spring made of a thin flat plate.

本発明の態様によれば、筆記状態と非筆記状態とを簡単且つ確実に切り替えることができるという共通の効果を奏する。   According to the aspect of the present invention, there is a common effect that the writing state and the non-writing state can be easily and reliably switched.

本発明の実施形態による筆記具の斜視図である。It is a perspective view of the writing instrument by embodiment of this invention. 図１の筆記具において後軸を省略した斜視図である。It is the perspective view which abbreviate | omitted the rear axis | shaft in the writing instrument of FIG. 図１の筆記具の筆記状態の縦断面図である。It is a longitudinal cross-sectional view of the writing state of the writing instrument of FIG. 図１の筆記具の非筆記状態の縦断面図である。It is a longitudinal cross-sectional view of the writing instrument of FIG. 1 in a non-writing state. 図１の筆記具の拡大縦断面図である。It is an enlarged vertical sectional view of the writing instrument of FIG. 図５の線Ｘ−Ｘにおける断面図である。It is sectional drawing in line XX of FIG. 後軸の縦断面図である。It is a longitudinal cross-sectional view of a rear axis. スイッチの斜視図である。It is a perspective view of a switch. スイッチの縦断面図である。It is a longitudinal cross-sectional view of a switch. スイッチ保持部材の斜視図である。It is a perspective view of a switch holding member. スイッチ保持部材の縦断面図である。It is a longitudinal cross-sectional view of a switch holding member. 係合部材の斜視図である。It is a perspective view of an engaging member. 係合部材の縦断面図である。It is a longitudinal cross-sectional view of an engaging member. スプリング保持部材の斜視図である。It is a perspective view of a spring holding member. スプリング保持部材の縦断面図である。It is a longitudinal cross-sectional view of a spring holding member. 往復部材の斜視図である。It is a perspective view of a reciprocating member. 往復部材の縦断面図である。It is a longitudinal cross-sectional view of a reciprocating member. 図１の筆記具の筆記状態と非筆記状態との切り替えを説明する縦断面図である。It is a longitudinal cross-sectional view explaining switching of the writing state of the writing instrument of FIG. 1 and a non-writing state.

以下、図面を参照しながら本発明の実施の形態を詳細に説明する。全図面に渡り、対応する構成要素には共通の参照符号を付す。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Corresponding components are denoted by common reference symbols throughout the drawings.

図１は、本発明の実施形態による筆記具１の斜視図であり、図２は、図１の筆記具１において後軸５を省略した斜視図であり、図３は、図１の筆記具１の筆記状態の縦断面図であり、図４は、図１の筆記具１の非筆記状態の縦断面図である。   1 is a perspective view of a writing instrument 1 according to an embodiment of the present invention, FIG. 2 is a perspective view of the writing instrument 1 of FIG. 1 with the rear shaft 5 omitted, and FIG. 3 is a writing of the writing instrument 1 of FIG. FIG. 4 is a longitudinal sectional view of the writing instrument 1 of FIG. 1 in a non-writing state.

筆記具１は、軸筒２と、クリップ部材３とを有している。軸筒２は、円筒状の前軸４と、前軸４の後端部にその前端部が圧入される円筒状の後軸５とを有している。軸筒２内には、筆記体であるリフィル６が、前後に移動可能、すなわち往復動可能に収容されている。前軸４の先端には孔が形成され、リフィル６先端の筆記部６ａが出没可能である。すなわち、筆記具１は、筆記部６ａが軸筒２の先端から突出した筆記状態（図３）と、筆記部６ａが軸筒２内に没入した非筆記状態（図４）とを切り替え可能な、いわゆる出没式の筆記具である。なお、本明細書中では、筆記具１の軸線方向において、筆記部６ａ側を「前」側と規定し、筆記部６ａとは反対側を「後」側と規定する。   The writing instrument 1 includes a shaft cylinder 2 and a clip member 3. The shaft cylinder 2 has a cylindrical front shaft 4 and a cylindrical rear shaft 5 whose front end portion is press-fitted into the rear end portion of the front shaft 4. A refill 6, which is a writing body, is accommodated in the shaft cylinder 2 so as to be movable back and forth, that is, capable of reciprocating. A hole is formed at the tip of the front shaft 4, and the writing portion 6 a at the tip of the refill 6 can be projected and retracted. That is, the writing instrument 1 can switch between a writing state in which the writing unit 6a protrudes from the tip of the shaft tube 2 (FIG. 3) and a non-writing state in which the writing unit 6a is immersed in the shaft tube 2 (FIG. 4). This is a so-called haunting type writing instrument. In the present specification, in the axial direction of the writing instrument 1, the writing part 6a side is defined as the “front” side, and the opposite side of the writing part 6a is defined as the “rear” side.

図５は、図１の筆記具１の拡大縦断面図であり、図６は、図５の線Ｘ−Ｘにおける断面図である。筆記具１は、スイッチ１０と、スイッチ保持部材２０と、係合部材３０と、スプリング５０と、スプリング保持部材４０と、往復部材６０とを有している。以下、図５及び図６並びに対応する図面を参照しながら、各構成について詳述する。   5 is an enlarged longitudinal sectional view of the writing instrument 1 of FIG. 1, and FIG. 6 is a sectional view taken along line XX of FIG. The writing instrument 1 includes a switch 10, a switch holding member 20, an engagement member 30, a spring 50, a spring holding member 40, and a reciprocating member 60. Hereinafter, each configuration will be described in detail with reference to FIGS. 5 and 6 and the corresponding drawings.

図７は、後軸５の縦断面図である。図７において、左が筆記具１の前側で、右が筆記具１の後側である。後軸５の側面には、スイッチ１０及びスイッチ保持部材２０を受容する円形の取付穴５ａが形成されている。取付穴５ａの後方の後軸５の内部には、内部を前後に隔てる隔壁５ｂが設けられている。また隔壁５ｂの中央には、貫通孔５ｃが形成されている。隔壁５ｂより後方の後軸５の内部は、後述する往復部材６０の対応する部分を受容するように形成されている。   FIG. 7 is a longitudinal sectional view of the rear shaft 5. In FIG. 7, the left is the front side of the writing instrument 1, and the right is the rear side of the writing instrument 1. A circular mounting hole 5 a for receiving the switch 10 and the switch holding member 20 is formed on the side surface of the rear shaft 5. A partition wall 5b is provided in the rear shaft 5 behind the mounting hole 5a to separate the interior in the front-rear direction. A through hole 5c is formed at the center of the partition wall 5b. The interior of the rear shaft 5 behind the partition wall 5b is formed to receive a corresponding portion of a reciprocating member 60 described later.

図８は、スイッチ１０の斜視図であり、図９は、スイッチ１０の縦断面図である。スイッチ１０は、円柱状に形成されたスイッチ本体１１と、スイッチ本体１１の上面に位置して使用者が押圧する押圧面１２と、スイッチ本体１１の下面に位置してより小径の円柱状に形成された挿入部１３とを有する。押圧面１２は、筆記具１が組み立てられた状態で外部に露出し、円筒状の後軸５の外周面と面一となるように湾曲面状に形成されている。挿入部１３の外周面には、外方に向かって突出するキー１４が形成されている。キー１４は、直方体状に形成され、上面はスイッチ本体１１の下面にも接続している。言い換えると、キー１４は、スイッチ本体１１の下面から下方に向かって突出している。スイッチ１０は、例えばポリカーボネート樹脂等といった比較的硬質の樹脂材料から一体的に形成される。   FIG. 8 is a perspective view of the switch 10, and FIG. 9 is a longitudinal sectional view of the switch 10. The switch 10 includes a switch body 11 formed in a cylindrical shape, a pressing surface 12 that is positioned on the upper surface of the switch body 11 and pressed by a user, and is formed in a smaller diameter columnar shape that is positioned on the lower surface of the switch body 11. And the inserted portion 13. The pressing surface 12 is exposed to the outside in a state in which the writing instrument 1 is assembled, and is formed in a curved surface shape so as to be flush with the outer peripheral surface of the cylindrical rear shaft 5. A key 14 that protrudes outward is formed on the outer peripheral surface of the insertion portion 13. The key 14 is formed in a rectangular parallelepiped shape, and the upper surface is connected to the lower surface of the switch body 11. In other words, the key 14 protrudes downward from the lower surface of the switch body 11. The switch 10 is integrally formed from a relatively hard resin material such as polycarbonate resin.

図１０は、スイッチ保持部材２０の斜視図であり、図１１は、スイッチ保持部材２０の縦断面図である。スイッチ保持部材２０は、円筒状の嵌合部２１を有している。嵌合部２１は、後軸５の取付穴５ａに内側からの圧入によって後軸５と嵌合するように外径が設定される。また、嵌合部２１の内径は、挿入されるスイッチ１０が滑らかに摺動可能に設定される。嵌合部２１の一端の端面は、スイッチ保持部材２０が後軸５に取り付けられた状態で外部に露出し、円筒状の後軸５の外周面と面一となるように湾曲面状に形成されている。嵌合部２１の他端には、後軸５に取り付けられた状態で後軸５の内周面に当接しながら前後に延在するフランジ部２２が形成されている。スイッチ保持部材２０は、アルミニウムや真鍮等の金属材料から形成される。   FIG. 10 is a perspective view of the switch holding member 20, and FIG. 11 is a longitudinal sectional view of the switch holding member 20. The switch holding member 20 has a cylindrical fitting portion 21. The outer diameter of the fitting portion 21 is set so as to be fitted to the rear shaft 5 by press-fitting into the mounting hole 5a of the rear shaft 5 from the inside. Further, the inner diameter of the fitting portion 21 is set so that the inserted switch 10 can slide smoothly. The end surface of one end of the fitting portion 21 is exposed to the outside in a state where the switch holding member 20 is attached to the rear shaft 5 and is formed in a curved surface shape so as to be flush with the outer peripheral surface of the cylindrical rear shaft 5. Has been. A flange portion 22 is formed at the other end of the fitting portion 21 so as to extend in the front-rear direction while being in contact with the inner peripheral surface of the rear shaft 5 while being attached to the rear shaft 5. The switch holding member 20 is formed from a metal material such as aluminum or brass.

図１２は、係合部材３０の斜視図であり、図１３は、係合部材３０の縦断面図である。係合部材３０は、図１３において、左が筆記具１の前側で右が筆記具１の後側となるように軸筒２内に配置される。係合部材３０は、直方体の外形を有し、矩形断面の筒状に形成されている。係合部材３０の一面の中央部分には、円形の挿入口３１が形成されている。挿入口３１は、スイッチ１０の挿入部１３と圧入によって嵌合するように内径が設定される。挿入口３１の前側の縁には、係合部材３０の長手方向において前方に延び、スイッチ１０のキー１４に対応するキー溝３２が形成されている。係合部材３０の挿入口３１にスイッチ１０の挿入部１３を圧入する際、スイッチ１０のキー１４が係合部材３０のキー溝３２に受容されるように、スイッチ１０の向きが調整される。このとき、スイッチ本体１１の下面は、係合部材３０の対向する上面と接着剤等によって接合される。挿入口３１の左右を長手方向に延びる角は、大きく面取りがされている。   FIG. 12 is a perspective view of the engaging member 30, and FIG. 13 is a longitudinal sectional view of the engaging member 30. In FIG. 13, the engaging member 30 is disposed in the shaft tube 2 so that the left side is the front side of the writing instrument 1 and the right side is the rear side of the writing instrument 1. The engaging member 30 has a rectangular parallelepiped outer shape and is formed in a cylindrical shape having a rectangular cross section. A circular insertion port 31 is formed in the central portion of one surface of the engaging member 30. An inner diameter of the insertion port 31 is set so as to be fitted to the insertion portion 13 of the switch 10 by press-fitting. A key groove 32 that extends forward in the longitudinal direction of the engagement member 30 and that corresponds to the key 14 of the switch 10 is formed at the front edge of the insertion port 31. When the insertion portion 13 of the switch 10 is press-fitted into the insertion port 31 of the engagement member 30, the orientation of the switch 10 is adjusted so that the key 14 of the switch 10 is received in the key groove 32 of the engagement member 30. At this time, the lower surface of the switch body 11 is joined to the upper surface of the engaging member 30 facing the adhesive member by an adhesive or the like. The corners extending in the longitudinal direction on the left and right of the insertion port 31 are greatly chamfered.

挿入口３１が形成された面に対向する面の外面の中央部分には、外方へ突出する押圧突起３３が形成されている（図１３）。押圧突起３３が形成された面の内面には、長手方向に亘って、断面が円弧状の円弧溝３４が形成されている。円弧溝３４の円弧の曲率半径は、後軸５の貫通孔５ｃと略同一に設定される。円弧溝３４の後端近傍には、円弧溝３４の深さよりは低く且つ上面が平坦な突起状の係合部３５が形成されている。係合部材３０は、例えばポリカーボネート樹脂等といった比較的硬質の樹脂材料から一体的に形成される。   A pressing protrusion 33 protruding outward is formed at the center of the outer surface of the surface opposite to the surface where the insertion port 31 is formed (FIG. 13). On the inner surface of the surface on which the pressing protrusion 33 is formed, an arc groove 34 having a circular arc section is formed in the longitudinal direction. The radius of curvature of the arc of the arc groove 34 is set to be substantially the same as the through hole 5 c of the rear shaft 5. In the vicinity of the rear end of the arc groove 34, a protrusion-like engagement portion 35 having a flat upper surface lower than the depth of the arc groove 34 is formed. The engaging member 30 is integrally formed from a relatively hard resin material such as polycarbonate resin.

図１４は、スプリング保持部材４０の斜視図であり、図１５は、スプリング保持部材４０の縦断面図である。スプリング保持部材４０は、図１５において、左が筆記具１の前側で右が筆記具１の後側となるように軸筒２内に配置される。スプリング保持部材４０は、Ｕ字溝の外形を有し、Ｕ字の外側である外面４１は円筒面状に形成され、Ｕ字の内側である内面４２は矩形状に形成されている。円筒面状の外面４１の外径は、スプリング保持部材４０が配置される後軸５の内径よりも僅かばかり小さく設定される。スプリング保持部材４０の内面４２によって画成される受容溝４５には、直方体の外形を有する係合部材３０が配置される。言い換えると、受容溝４５の幅は、対応する係合部材３０の幅より僅かばかり大きく設定される。内面４２の平坦な底面の中央付近には、円形で浅い凹部４３が形成されている。凹部４３内には、階段状の段部４４が形成されている。スプリング保持部材４０は、例えばポリカーボネート樹脂等といった比較的硬質の樹脂材料から一体的に形成される。   FIG. 14 is a perspective view of the spring holding member 40, and FIG. 15 is a longitudinal sectional view of the spring holding member 40. In FIG. 15, the spring holding member 40 is disposed in the shaft tube 2 so that the left side is the front side of the writing instrument 1 and the right side is the rear side of the writing instrument 1. The spring holding member 40 has an outer shape of a U-shaped groove, and an outer surface 41 that is the outer side of the U shape is formed in a cylindrical surface shape, and an inner surface 42 that is an inner side of the U shape is formed in a rectangular shape. The outer diameter of the cylindrical outer surface 41 is set slightly smaller than the inner diameter of the rear shaft 5 on which the spring holding member 40 is disposed. In the receiving groove 45 defined by the inner surface 42 of the spring holding member 40, the engaging member 30 having a rectangular parallelepiped outer shape is arranged. In other words, the width of the receiving groove 45 is set slightly larger than the width of the corresponding engaging member 30. A circular and shallow recess 43 is formed near the center of the flat bottom surface of the inner surface 42. A stepped step 44 is formed in the recess 43. The spring holding member 40 is integrally formed from a relatively hard resin material such as polycarbonate resin.

スプリング５０は、スプリング保持部材４０の凹部４３内の段部４４上に配置される。ドームスプリングは、一枚の金属等の薄板平板からなる材料をドーム状に加工した弾性部材であり、ドームの頂点を押圧して弾性変形させると、それに応じた復元力が得られる。スプリング５０は、例えば、株式会社アキュレイト製の金属製のドームスプリングである。スプリング５０は、その他の弾性部材、例えばコイルスプリングや、シリコーンゴム等のゴム材質又はポリエステル系エラストマー等の熱可塑性エラストマーといった弾性材料を配置してもよい。   The spring 50 is disposed on the step 44 in the recess 43 of the spring holding member 40. The dome spring is an elastic member obtained by processing a material made of a thin plate such as a sheet of metal into a dome shape. When the top of the dome is pressed and elastically deformed, a restoring force corresponding to the elastic member is obtained. The spring 50 is, for example, a metal dome spring manufactured by Accurate Corporation. The spring 50 may be made of another elastic member, for example, an elastic material such as a coil spring, a rubber material such as silicone rubber, or a thermoplastic elastomer such as polyester elastomer.

図１６は、往復部材６０の斜視図であり、図１７は、往復部材６０の縦断面図である。往復部材６０は、図１７において、左が筆記具１の前側で右が筆記具１の後側となるように軸筒２内に配置される。往復部材６０は、後部に配置され且つ肉厚の円筒状に形成された大径の重量部６１と、前部に配置され且つ円筒状に形成された小径のリフィル嵌合部６３と、重量部６１とリフィル嵌合部６３とを連結する接続部６４とを有している。   FIG. 16 is a perspective view of the reciprocating member 60, and FIG. 17 is a longitudinal sectional view of the reciprocating member 60. In FIG. 17, the reciprocating member 60 is disposed in the shaft tube 2 so that the left side is the front side of the writing instrument 1 and the right side is the rear side of the writing instrument 1. The reciprocating member 60 includes a large-diameter weight portion 61 disposed in the rear portion and formed in a thick cylindrical shape, a small-diameter refill fitting portion 63 disposed in the front portion and formed in a cylindrical shape, and a weight portion. 61 and the connection part 64 which connects the refill fitting part 63.

重量部６１の外周面には、２つの環状の突起である摺動突起６２が形成されている。重量部６１は、後軸５の隔壁５ｂによって隔てられた後方の空間に配置され、筆記具１の姿勢に応じて、すなわち重力の作用する方向に向かって前後に移動する錘の役割を果たす。前後の移動の際、摺動突起６２が後軸５の内周面に当接して摺動し、軸筒２の中心軸線と往復部材６０の中心軸線とが一致する状態を維持するようにしている。   On the outer peripheral surface of the weight portion 61, two sliding protrusions 62 that are annular protrusions are formed. The weight portion 61 is disposed in a rear space separated by the partition wall 5b of the rear shaft 5, and functions as a weight that moves back and forth in accordance with the posture of the writing instrument 1, that is, in the direction in which gravity acts. During the back-and-forth movement, the sliding projection 62 contacts and slides against the inner peripheral surface of the rear shaft 5 so that the center axis of the shaft cylinder 2 and the center axis of the reciprocating member 60 are kept in agreement. Yes.

リフィル嵌合部６３は、リフィル６の後端部に挿入され、それによって、リフィル６と往復部材６０とが一体に接続される（図５）。リフィル嵌合部６３には、リフィル嵌合部６３がリフィル６に挿入された状態で、リフィル６と外部を連通する通気孔６５が形成されている。   The refill fitting portion 63 is inserted into the rear end portion of the refill 6, whereby the refill 6 and the reciprocating member 60 are integrally connected (FIG. 5). The refill fitting portion 63 is formed with a vent hole 65 that communicates the refill 6 with the outside in a state where the refill fitting portion 63 is inserted into the refill 6.

接続部６４は、リフィル嵌合部６３と略同じ外径に形成されている。また、リフィル嵌合部６３及び接続部６４は、後軸５の隔壁５ｂに形成された貫通孔５ｃよりも僅かばかり小さい外径に設定される。接続部６４には、軸線方向に沿って並列する２つの環状の凹部が形成されている。後述するように、後側に配置された凹部は、筆記状態を維持するように係合部材３０の係合部３５と係合する筆記維持凹部６６であり、前側に配置された凹部は、非筆記状態を維持するように係合部材３０の係合部３５と係合する非筆記維持凹部６７である。往復部材６０は、アルミニウムや真鍮等の金属材料から形成される。   The connection portion 64 is formed to have substantially the same outer diameter as the refill fitting portion 63. Further, the refill fitting portion 63 and the connection portion 64 are set to have an outer diameter slightly smaller than the through hole 5c formed in the partition wall 5b of the rear shaft 5. The connecting portion 64 is formed with two annular recesses arranged in parallel along the axial direction. As will be described later, the recessed portion disposed on the rear side is a writing maintaining recessed portion 66 that engages with the engaging portion 35 of the engaging member 30 so as to maintain the writing state, and the recessed portion disposed on the front side is not It is the non-writing maintenance recessed part 67 engaged with the engaging part 35 of the engaging member 30 so that a writing state may be maintained. The reciprocating member 60 is formed from a metal material such as aluminum or brass.

図３乃至図６を参照しながら、筆記具１の組み立てについて説明する。まず、スイッチ保持部材２０が、後軸５の前方から挿入され、後軸５の取付穴５ａに内側からの圧入によって取り付けられる。次いで、スプリング保持部材４０が、スプリング５０が凹部４３内に配置され且つ係合部材３０が受容溝４５内に配置された状態で、後軸５の前方から後軸５の隔壁５ｂに当接するまで挿入される。この状態では、係合部材３０の押圧突起３３が、スプリング５０のドーム状の頂点に配置されている。次いで、前軸４が、後軸５の前方から挿入され、前軸４の後端面と隔壁５ｂの前端面とで、スプリング保持部材４０が挟持される。次いで、スイッチ１０が、後軸５の外側からスイッチ保持部材２０の嵌合部２１内に挿入され、スイッチ１０の挿入部１３が、後軸５の内部に配置された係合部材３０の挿入口３１内に圧入によって取り付けられる。   The assembly of the writing instrument 1 will be described with reference to FIGS. 3 to 6. First, the switch holding member 20 is inserted from the front of the rear shaft 5 and attached to the mounting hole 5a of the rear shaft 5 by press-fitting from the inside. Next, the spring holding member 40 is in contact with the partition wall 5b of the rear shaft 5 from the front of the rear shaft 5 with the spring 50 disposed in the recess 43 and the engagement member 30 disposed in the receiving groove 45. Inserted. In this state, the pressing protrusion 33 of the engaging member 30 is disposed at the dome-shaped apex of the spring 50. Next, the front shaft 4 is inserted from the front of the rear shaft 5, and the spring holding member 40 is sandwiched between the rear end surface of the front shaft 4 and the front end surface of the partition wall 5b. Next, the switch 10 is inserted into the fitting portion 21 of the switch holding member 20 from the outside of the rear shaft 5, and the insertion portion 13 of the switch 10 is inserted into the engagement member 30 disposed inside the rear shaft 5. 31 is attached by press fitting.

次いで、往復部材６０と接続されたリフィル６が、後軸５の後方から挿入される。スイッチ１０が押圧されていない場合には、スプリング５０は弾性変形をしていないか、僅かに弾性変形をして、スイッチ１０を付勢するようにしてもよい。すなわち、係合部材３０は、筆記具１の径方向において、最もスイッチ１０の方に寄った位置にある。したがって、後軸５の貫通孔５ｃに挿入されたリフィル６は、係合部材３０の係合部３５に阻害されて奥まで挿入できない。   Next, the refill 6 connected to the reciprocating member 60 is inserted from the rear of the rear shaft 5. When the switch 10 is not pressed, the spring 50 may not be elastically deformed or may be slightly elastically deformed to bias the switch 10. That is, the engaging member 30 is at a position closest to the switch 10 in the radial direction of the writing instrument 1. Therefore, the refill 6 inserted into the through hole 5 c of the rear shaft 5 is blocked by the engagement portion 35 of the engagement member 30 and cannot be inserted all the way.

他方、スイッチ１０を押圧すると、係合部材３０が径方向に沿って移動することによって押圧突起３３がスプリング５０を押圧し、スプリング５０が径方向に弾性変形する。その結果、係合部材３０の係合部３５が径方向に沿って移動することによって、係合部３５によって阻害されていた経路が解放され、リフィル６及び往復部材６０が進入することが可能となる。   On the other hand, when the switch 10 is pressed, the engaging member 30 moves along the radial direction, whereby the pressing protrusion 33 presses the spring 50, and the spring 50 is elastically deformed in the radial direction. As a result, when the engagement portion 35 of the engagement member 30 moves along the radial direction, the path that has been hindered by the engagement portion 35 is released, and the refill 6 and the reciprocating member 60 can enter. Become.

よって、スイッチ１０を押圧しながら、往復部材６０の重量部６１が後軸５の隔壁５ｂに当接するまで挿入する。次いで、スイッチ１０を解放すると、スプリング５０の復元力によって、係合部材３０は再び径方向に沿って移動し、元の位置に復帰する。このとき、係合部材３０の係合部３５が、往復部材６０の接続部６４の筆記維持凹部６６内に配置される。最後に、クリップ部材３を後軸５の後端部に取り付け、筆記具１の組み立てが完了する。   Therefore, while pressing the switch 10, the weight portion 61 of the reciprocating member 60 is inserted until it contacts the partition wall 5 b of the rear shaft 5. Next, when the switch 10 is released, the engagement member 30 moves again along the radial direction by the restoring force of the spring 50 and returns to the original position. At this time, the engaging portion 35 of the engaging member 30 is disposed in the writing maintaining recess 66 of the connecting portion 64 of the reciprocating member 60. Finally, the clip member 3 is attached to the rear end portion of the rear shaft 5, and the assembly of the writing instrument 1 is completed.

係合部材３０の係合部３５が、筆記維持凹部６６内、又は、後述するように非筆記維持凹部６７内に配置されることによって、係合部材３０と往復部材６０とが軸線方向に係合し、軸筒２に対する往復部材６０の移動、すなわち往復部材６０に取り付けられたリフィル６の軸線方向の移動を規制し、筆記状態又は非筆記状態が維持される。   By engaging the engaging portion 35 of the engaging member 30 in the writing maintaining recess 66 or in the non-writing maintaining recess 67 as will be described later, the engaging member 30 and the reciprocating member 60 are engaged in the axial direction. The movement of the reciprocating member 60 relative to the shaft cylinder 2, that is, the movement of the refill 6 attached to the reciprocating member 60 in the axial direction is restricted, and the writing state or the non-writing state is maintained.

図１８は、図１の筆記具１の筆記状態と非筆記状態との切り替えを説明する縦断面図である。図１８（Ａ）は、筆記具１の筆記状態を示しており、図５に示された筆記具１と同じ状態を示している。すなわち、図１８（Ａ）では、係合部材３０の係合部３５が、筆記維持凹部６６内に配置されている。   FIG. 18 is a longitudinal sectional view for explaining switching between the writing state and the non-writing state of the writing instrument 1 of FIG. FIG. 18A shows the writing state of the writing instrument 1 and shows the same state as the writing instrument 1 shown in FIG. That is, in FIG. 18A, the engaging portion 35 of the engaging member 30 is disposed in the writing maintaining recess 66.

図１８（Ｂ）は、スイッチ１０を押下している状態を示している。すなわち、係合部材３０の径方向に沿った移動によって、係合部３５は、往復部材６０の筆記維持凹部６６又は非筆記維持凹部６７との係合が解除されるまで、径方向をスイッチ１０とは反対の方向に移動する。その結果、往復部材６０は、軸筒２内を前後方向に自由に移動可能となる。すなわち、スイッチ１０を押下しながら筆記具１の姿勢を変えると、往復部材６０及びこれに接続されたリフィル６に作用する重力、すなわち自重によって、往復部材６０が軸筒２内を前方又は後方へ移動する。   FIG. 18B shows a state where the switch 10 is pressed. That is, by the movement of the engaging member 30 along the radial direction, the engaging portion 35 switches the radial direction until the engagement of the reciprocating member 60 with the writing maintaining recess 66 or the non-writing maintaining recess 67 is released. Move in the opposite direction. As a result, the reciprocating member 60 can freely move in the front-rear direction within the shaft cylinder 2. That is, when the posture of the writing instrument 1 is changed while the switch 10 is pressed, the reciprocating member 60 moves forward or backward in the shaft tube 2 due to gravity acting on the reciprocating member 60 and the refill 6 connected thereto, that is, its own weight. To do.

使用者が、スイッチ１０を押下しながら前端が下方を向くように筆記具１を把持すると、往復部材６０は重力によって前方へ移動する。往復部材６０の前方への移動は、重量部６１と後軸５の隔壁５ｂとの当接によって規制される。このときにスイッチ１０の押圧を解放すると、スプリング５０の復元力によって係合部材３０が径方向に沿って移動し、図１８（Ａ）に示されるように、係合部３５が往復部材６０の筆記維持凹部６６内に配置される。その結果、係合部材３０と往復部材６０とが係合し、筆記状態が維持される。   When the user holds the writing instrument 1 so that the front end faces downward while pressing down the switch 10, the reciprocating member 60 moves forward by gravity. The forward movement of the reciprocating member 60 is restricted by the contact between the weight portion 61 and the partition wall 5 b of the rear shaft 5. When the pressing of the switch 10 is released at this time, the engaging member 30 moves along the radial direction by the restoring force of the spring 50, and the engaging portion 35 of the reciprocating member 60 is moved as shown in FIG. It is arranged in the writing maintenance recess 66. As a result, the engaging member 30 and the reciprocating member 60 are engaged, and the writing state is maintained.

他方、使用者が、スイッチ１０を押下しながら前端が上方を向くように筆記具１を把持すると、往復部材６０は重力によって後方へ移動する。往復部材６０の後方への移動は、重量部６１と後軸５の後端部に挿入されたクリップ部材３の部分との当接によって規制される。このときにスイッチ１０の押圧を解放すると、スプリング５０の復元力によって係合部材３０が径方向に沿って移動し、図１８（Ｃ）に示されるように、係合部３５が往復部材６０の非筆記維持凹部６７内に配置される。その結果、係合部材３０と往復部材６０とが係合し、非筆記状態が維持される。   On the other hand, when the user holds the writing instrument 1 so that the front end faces upward while pressing the switch 10, the reciprocating member 60 moves rearward due to gravity. The rearward movement of the reciprocating member 60 is restricted by contact between the weight portion 61 and the portion of the clip member 3 inserted into the rear end portion of the rear shaft 5. When the pressing of the switch 10 is released at this time, the engaging member 30 moves along the radial direction by the restoring force of the spring 50, and the engaging portion 35 of the reciprocating member 60 is moved as shown in FIG. Arranged in the non-writing maintaining recess 67. As a result, the engaging member 30 and the reciprocating member 60 are engaged, and the non-writing state is maintained.

本発明によれば、係合部材３０の係合部３５と往復部材６０の筆記維持凹部６６又は非筆記維持凹部６７との係合が、スイッチ１０の径方向に沿った移動に伴う係合部材３０の径方向に沿った移動によって解除されることから、筆記状態と非筆記状態とを簡単且つ確実に切り替えることができる。さらに、係合部材３０の係合部３５は、往復部材６０の筆記維持凹部６６内又は非筆記維持凹部６７内に配置された状態で、前後方向に適度なクリアランスがあることから、スイッチ１０を押圧する際に、押圧操作を阻害しない。また、リフィル６と往復部材６０と一体に接続されており、重量部６１が錘である重量部６１を有していることから、スムーズで安定的に動作し、筆記状態と非筆記状態とを確実に切り替えることができる。   According to the present invention, the engagement between the engagement portion 35 of the engagement member 30 and the writing maintaining recess 66 or the non-writing maintaining recess 67 of the reciprocating member 60 is caused by the movement of the switch 10 along the radial direction. Since it cancels | releases by the movement along 30 radial directions, it can switch easily and reliably between a writing state and a non-writing state. Further, since the engaging portion 35 of the engaging member 30 is disposed in the writing maintaining recess 66 or the non-writing maintaining recess 67 of the reciprocating member 60, there is an appropriate clearance in the front-rear direction. The pressing operation is not hindered when pressing. In addition, since the refill 6 and the reciprocating member 60 are integrally connected and the weight portion 61 includes the weight portion 61 that is a weight, the refill 6 and the reciprocating member 60 operate smoothly and stably, and the writing state and the non-writing state can be achieved. It can be switched reliably.

弾性部材としてドームスプリングを使用していることから、スイッチ１０の押下操作時に、使用者は、短い押圧ストロークで確実なクリック感を感じることができ、心地よい操作感を得ることができる。   Since the dome spring is used as the elastic member, when the switch 10 is pressed, the user can feel a certain click feeling with a short pressing stroke, and can obtain a comfortable operation feeling.

１ 筆記具
２ 軸筒
４ 前軸
５ 後軸
６ リフィル
１０ スイッチ
２０ スイッチ保持部材
３０ 係合部材
３５ 係合部
４０ スプリング保持部材
５０ スプリング
６０ 往復部材 DESCRIPTION OF SYMBOLS 1 Writing instrument 2 Shaft cylinder 4 Front shaft 5 Rear shaft 6 Refill 10 Switch 20 Switch holding member 30 Engagement member 35 Engagement part 40 Spring holding member 50 Spring 60 Reciprocating member

Claims (3)

軸筒と、該軸筒内に移動可能に配置された筆記体と、前記軸筒の側面に設けられた押圧部材と、前記筆記体と軸線方向に係合して該筆記体の移動を規制する係合部と、前記押圧部材と対向する位置の前記軸筒内に配置された弾性部材と、を具備する筆記具であって、
前記押圧部材を径方向に沿って押圧すると、前記係合部の係合が解除されて前記筆記体が重力によって移動可能となると共に、前記弾性部材が径方向に圧縮され、前記押圧を解放すると、前記弾性部材の復元力によって前記係合部が前記筆記体と係合することを特徴とする筆記具。 A shaft cylinder, a writing body movably disposed in the shaft cylinder, a pressing member provided on a side surface of the shaft cylinder, and the writing body engaging with the writing body in the axial direction to restrict movement of the writing body. A writing instrument comprising: an engaging portion to be engaged; and an elastic member disposed in the shaft tube at a position facing the pressing member,
When the pressing member is pressed along the radial direction, the engagement portion is disengaged and the writing body can be moved by gravity, and the elastic member is compressed in the radial direction to release the pressing. The writing instrument wherein the engaging portion engages with the writing body by a restoring force of the elastic member. 筒状に形成された係合部材をさらに具備し、前記係合部が前記係合部材の内面に設けられていることを特徴とする請求項１に記載の筆記具。   The writing instrument according to claim 1, further comprising an engagement member formed in a cylindrical shape, wherein the engagement portion is provided on an inner surface of the engagement member. 前記弾性部材が、薄板平板からなるドーム状のスプリングであることを特徴とする請求項１又は２に記載の筆記具。   The writing instrument according to claim 1, wherein the elastic member is a dome-shaped spring made of a thin flat plate.

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