JP4378464B2

JP4378464B2 - Writing instrument pressing member

Info

Publication number: JP4378464B2
Application number: JP2003187717A
Authority: JP
Inventors: 順一高橋
Original assignee: Pentel Co Ltd
Current assignee: Pentel Co Ltd
Priority date: 2003-06-30
Filing date: 2003-06-30
Publication date: 2009-12-09
Anticipated expiration: 2023-06-30
Also published as: JP2005022125A

Description

【０００１】
【発明の属する技術分野】
本発明は、軸筒の内部に筆記体を有し、その筆記体を押圧操作によって出没させた筆記具に関する。
【０００２】
【従来の技術】
１例として、ノック式ボールペンを挙げ説明する。軸筒内には、レフィルが摺動自在に挿入されており、そのレフィルはノックスプリングにより後方に付勢されている。又、レフィルの後方には、カム機構を介してノック部が軸筒後端から突出した状態で配置されている。即ち、ノック部を押圧することにより、レフィルのボールペンチップが軸筒先端から突出するのである（特許文献１参照）。
【０００３】
【特許文献１】
特開２００３−１３６８８０号公報（段落００１６、並びに、図１など）。
【０００４】
【発明が解決しようとする課題】
通常、レフィルの突出操作を行う場合には、親指などの腹部で前記ノック部の頂部を、ノックスプリングの弾撥力に抗して押圧する。しかし、そのノック部は、小さく、それ故に、レフィルの突出操作を行う際、ノック部が指の腹に食い込むような感じがして、違和感があるものとなっていしまっていた。
【０００５】
【課題を解決するための手段】
本発明は、軸筒の内部に筆記体を有し、その筆記体を押圧操作によって出没させた筆記具であって、前記押圧操作を行う押圧部材の表面に軟質部材を取り付けると共に、その軟質部材に貫通孔を形成し、また、その軟質部材の前端部に係合部を形成し、その係合部を前記押圧部材の係合受部に係合させ、さらに、前記押圧部材の頂部を軟質部材の貫通孔の中間部に位置させ、また、前記押圧部材に凸部を延設形成すると共に、その凸部に係合する凹部を前記軟質部材の前端部に形成したことを要旨とする。
【０００６】
【作用】
軟質部材の柔軟性が指への感触となる。
【０００７】
【実施例】
図１〜図７に本発明の第１例について説明する。リフィルを押圧操作によって出没させる、所謂、ノック式ボールペンである。軸筒１の内部には、コイルスプリングなどの弾撥部材２によって、常に後方に付勢されたリフィル３が前後動可能に挿着されている。そのリフィル３の後方には、カム部材や回転子、摺動子からなるカム機構４を介して押圧部材５が配置されている。その押圧部材５の上方部は、前記軸筒の後端から突出しており、その突出した部分には、シリコーンゴムやＮＢＲ、スチレン系やオレフィン系、ウレタン系、ポルエステル系などの熱可塑性エラストマーなどからなる軟質部材６が取り付けられている。
参照符号７は、前記軸筒１の把持する部分の設けられたゴム状部材からなるグリップであって、参照符号８は前記カム部材と一体成形されたクリップであるが、軸筒１と一体的に成型しても良い。
【０００８】
次ぎに、前記軟質部材６の押圧部材５への取り付け構造について説明する。押圧部材５の上部には、縮径部９が形成されており、その縮径部９には鍔部１０が形成されている。その鍔部１０には、上方に向けて縮径する円錐部１１が形成されており、その円錐部１１からは前記縮径部９よりも若干小径な筒状部１２が上方に向けて形成されている。又、前記縮径部９の下方には、押圧部材本体から延設形成された凸部１３が放射状に４箇所形成されているが、この形成数に限定されるものではない。そして、その凸部１３が形成されることによって、隣り合う凸部間には、凹部１４が形成される。
【０００９】
一方、押圧部材５に取り付けられる軟質部材６は、有底の筒状部材となっているが、その底部には貫通孔１５が形成されている。この貫通孔１５に前記押圧部材５の筒状部１２が嵌り込むが、筒状部１２の頂部は、貫通孔１５の中間部に位置している。つまり、押圧操作を行った際、指の腹が貫通孔１５に多少潜り込むが、筒状部１２の頂部には極力振れないようにしているのである。
又、軟質部材６の前端部には、凹部１６が放射状に４箇所形成されている。この凹部１６を形成することによって、その隣り合う凹部間には凸部１７が形成される。そして、この軟質部材５の凹部１６が前記押圧部材５の凸部１３に、軟質部材６の凸部１７が前記押圧部材５の凹部１４に係合し合うのである。これらの係合によって、軟質部材６の押圧部材５に対する相対的な回転が防止され、良好な押圧操作が可能となるのである。又、軟質部材６に貫通孔１５と凹部１６を形成することによって、その軟質部材６が押圧部材５から外れ、その軟質部材６を、万が一、飲み込んでしまったときには、貫通孔１５と凹部１６とから空気が流通し窒息死などを極力防止することができる。尚、本例における凹部１６は半円弧状（半楕円状）をなしているが、これに捕らわれず、例えば、コ型の凹部としても良い。
【００１０】
更に、その軟質部材６の内側には、前記鍔部１０の外径よりも若干小径の大径部１８が形成されているが、下方に向け縮径した円錐部１９も連続的に形成されている。そして、その大径部１８が前記押圧部材５の鍔部１０に係合することによって、軸線方向に対する脱落が防止されている。尚、軟質部材６を押圧部材５に取り付ける際には、押圧部材５に形成された円錐形状部１１によって案内・拡開され若干の圧入状態で容易に挿着することができるが、挿着後においては鍔部１０によって容易には脱落しないようになっている。
【００１１】
第２例を図８〜図９に示し説明する。押圧部材２０の上部には、前例と同様に凸部２１並びに、凹部２２、そして縮径部２３が形成されているが、その縮径部２３の外周面には螺旋突起２４が形成されている。所謂、雄螺子が形成されているのである。一方、軟質部材２５の内面には、前記螺旋突起に螺合する雌螺子２６が形成されている。そして、互いを螺合させることによって、互いの接触面積をより多くし、軟質部材の押圧部材に対する脱落防止効果を向上させているのである。尚、押圧部材に軟質部材を挿着にあたっては、軟質部材であるが故に、小径部の上端から若干の押圧力を付与し押し込むと容易に挿着する。参照符号２７は、前記押圧部材２０の凸部２１と係合する凹部であって、参照符号２８は押圧部材２０の凹部２２に係合する突部である。
【００１２】
【発明の効果】
本発明は、軸筒の内部に筆記体を有し、その筆記体を押圧操作によって出没させた筆記具であって、前記押圧操作を行う押圧部材の表面に軟質部材を取り付けると共に、その軟質部材に貫通孔を形成し、また、その軟質部材の前端部に係合部を形成し、その係合部を前記押圧部材の係合受部に係合させ、さらに、前記押圧部材の頂部を軟質部材の貫通孔の中間部に位置させ、また、前記押圧部材に凸部を延設形成すると共に、その凸部に係合する凹部を前記軟質部材の前端部に形成したので、違和感なく押圧操作を行うことができる。
【図面の簡単な説明】
【図１】本発明の第１例を示す外観図。
【図２】押圧部材を示す縦半断面図。
【図３】図２の上面図。
【図４】軟質部材を示す縦断面図。
【図５】図４の上方外観斜視図。
【図６】図４の下方外観斜視図。
【図７】第２例を示す押圧部材の縦半断面図。
【図８】図７の上面図。
【図９】第２例の軟質部材を示す縦断面図。
【符号の説明】
１軸筒
２後軸
３リフィル（筆記体）
４カム機構
５押圧部材
６軟質部材
９スリット
１３凸部
１４凹部
１６凹部
１７凸部
２１凸部
２２凹部
２７凹部
２８凸部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a writing instrument that has a writing body inside a shaft tube, and that has been made to appear and disappear by a pressing operation.
[0002]
[Prior art]
As an example, a knock type ballpoint pen will be described. A refill is slidably inserted into the shaft cylinder, and the refill is urged rearward by a knock spring. In addition, a knock portion is disposed behind the refill in a state of protruding from the rear end of the shaft cylinder via a cam mechanism. That is, when the knock portion is pressed, the refill ballpoint pen tip protrudes from the tip of the shaft cylinder (see Patent Document 1).
[0003]
[Patent Document 1]
JP2003-136880 (paragraph 0016, FIG. 1 etc.).
[0004]
[Problems to be solved by the invention]
Normally, when performing a refill projecting operation, the top of the knock part is pressed against the elastic force of the knock spring with an abdomen such as a thumb. However, the knock portion is small, and therefore, when the refill projecting operation is performed, the knock portion feels like biting into the belly of the finger, which makes the user feel uncomfortable.
[0005]
[Means for Solving the Problems]
The present invention is a writing instrument having a writing body inside a shaft cylinder, the writing body being projected and retracted by a pressing operation, and a soft member is attached to the surface of the pressing member that performs the pressing operation, and the soft member A through hole is formed, an engaging portion is formed at the front end of the soft member, the engaging portion is engaged with an engaging receiving portion of the pressing member, and the top of the pressing member is further connected to the soft member. It is located in the intermediate part of the through-hole of this, and also the convex part was extended and formed in the said press member, and the summary made it the recessed part engaged with the convex part formed in the front end part of the said soft member.
[0006]
[Action]
The softness of the soft member provides a feeling to the finger.
[0007]
【Example】
A first example of the present invention will be described with reference to FIGS. This is a so-called knock-type ballpoint pen that causes the refill to appear and disappear by a pressing operation. A refill 3 that is always urged rearward by a resilient member 2 such as a coil spring is inserted into the shaft cylinder 1 so as to be movable back and forth. A pressing member 5 is disposed behind the refill 3 via a cam mechanism 4 including a cam member, a rotor, and a slider. The upper part of the pressing member 5 protrudes from the rear end of the shaft cylinder, and the protruding part is made of a thermoplastic elastomer such as silicone rubber, NBR, styrene, olefin, urethane, or porester. A soft member 6 is attached.
Reference numeral 7 is a grip made of a rubber-like member provided with a portion to be gripped by the shaft cylinder 1, and reference numeral 8 is a clip formed integrally with the cam member, but is integrated with the shaft cylinder 1. It may be molded into.
[0008]
Next, a structure for attaching the soft member 6 to the pressing member 5 will be described. A reduced diameter portion 9 is formed on the upper portion of the pressing member 5, and a flange portion 10 is formed on the reduced diameter portion 9. The flange portion 10 is formed with a conical portion 11 whose diameter is reduced upward, and a cylindrical portion 12 slightly smaller in diameter than the reduced diameter portion 9 is formed upward from the conical portion 11. ing. Moreover, although the convex part 13 extended and formed from the press member main body is radially formed in the downward direction of the said diameter reducing part 9, it is not limited to this formation number. And the convex part 13 is formed, The recessed part 14 is formed between adjacent convex parts.
[0009]
On the other hand, the soft member 6 attached to the pressing member 5 is a bottomed cylindrical member, and a through hole 15 is formed at the bottom thereof. Although the cylindrical portion 12 of the pressing member 5 is fitted into the through hole 15, the top portion of the cylindrical portion 12 is located at the intermediate portion of the through hole 15. That is, when the pressing operation is performed, the belly of the finger is slightly submerged in the through hole 15, but the top of the tubular portion 12 is prevented from shaking as much as possible.
Further, four concave portions 16 are formed radially at the front end portion of the soft member 6. By forming the concave portion 16, a convex portion 17 is formed between the adjacent concave portions. The concave portion 16 of the soft member 5 engages with the convex portion 13 of the pressing member 5, and the convex portion 17 of the soft member 6 engages with the concave portion 14 of the pressing member 5. These engagements prevent the relative rotation of the soft member 6 with respect to the pressing member 5 and enables a favorable pressing operation. Further, by forming the through-hole 15 and the concave portion 16 in the soft member 6, when the soft member 6 comes off from the pressing member 5 and the soft member 6 is swallowed, the through-hole 15 and the concave portion 16 Air can flow through and prevent asphyxiation and death as much as possible. In addition, although the recessed part 16 in this example has comprised the semicircular arc shape (semi-ellipse shape), it is not caught by this, For example, it is good also as a U-shaped recessed part.
[0010]
Further, a large-diameter portion 18 having a slightly smaller diameter than the outer diameter of the flange portion 10 is formed inside the soft member 6, but a conical portion 19 having a diameter reduced downward is also continuously formed. Yes. The large-diameter portion 18 is engaged with the flange portion 10 of the pressing member 5 so that the axial direction is prevented from falling off. When the soft member 6 is attached to the pressing member 5, it can be guided and expanded by the conical portion 11 formed on the pressing member 5 and can be easily inserted in a slightly press-fitted state. In this case, the collar 10 does not easily fall off.
[0011]
A second example will be described with reference to FIGS. A convex portion 21, a concave portion 22, and a reduced diameter portion 23 are formed on the upper portion of the pressing member 20, as in the previous example, and a helical protrusion 24 is formed on the outer peripheral surface of the reduced diameter portion 23. . A so-called male screw is formed. On the other hand, on the inner surface of the soft member 25, a female screw 26 that is screwed into the spiral protrusion is formed. Then, by screwing each other, the mutual contact area is increased, and the effect of preventing the soft member from falling off the pressing member is improved. Since the soft member is inserted into the pressing member, since it is a soft member, it is easily inserted by applying a slight pressing force from the upper end of the small diameter portion. Reference numeral 27 is a concave portion that engages with the convex portion 21 of the pressing member 20, and reference numeral 28 is a protrusion that engages with the concave portion 22 of the pressing member 20.
[0012]
【The invention's effect】
The present invention is a writing instrument having a writing body inside a shaft cylinder, the writing body being projected and retracted by a pressing operation, and a soft member is attached to the surface of the pressing member that performs the pressing operation, and the soft member A through hole is formed, an engaging portion is formed at the front end of the soft member, the engaging portion is engaged with an engaging receiving portion of the pressing member, and the top of the pressing member is further connected to the soft member. In addition, a convex portion is formed to extend in the pressing member and a concave portion that engages with the convex portion is formed in the front end portion of the soft member. It can be carried out.
[Brief description of the drawings]
FIG. 1 is an external view showing a first example of the present invention.
FIG. 2 is a longitudinal half sectional view showing a pressing member.
FIG. 3 is a top view of FIG. 2;
FIG. 4 is a longitudinal sectional view showing a soft member.
5 is an upper external perspective view of FIG. 4. FIG.
6 is a perspective view of the lower appearance of FIG. 4. FIG.
FIG. 7 is a longitudinal half sectional view of a pressing member showing a second example.
FIG. 8 is a top view of FIG.
FIG. 9 is a longitudinal sectional view showing a soft member of a second example.
[Explanation of symbols]
1 Shaft cylinder 2 Rear axle 3 Refill (cursive)
4 Cam mechanism 5 Pressing member 6 Soft member 9 Slit 13 Convex part 14 Concave part 16 Concave part 17 Convex part 21 Convex part 22 Concave part 27 Concave part 28 Convex part

Claims

A writing instrument that has a writing body inside a shaft tube, and the writing body is projected and retracted by a pressing operation, and a soft member is attached to the surface of the pressing member that performs the pressing operation, and a through hole is formed in the soft member. In addition, an engaging portion is formed at the front end portion of the soft member, the engaging portion is engaged with the engaging receiving portion of the pressing member, and the top portion of the pressing member is inserted into the through hole of the soft member. A pressing member for a writing instrument, wherein the pressing member is positioned at an intermediate portion, and a convex portion is formed extending from the pressing member, and a concave portion engaging with the convex portion is formed at a front end portion of the soft member.

2. The pressing member for a writing instrument according to claim 1, wherein the engaging portion has a concave-convex shape, and the engagement receiving portion has a similar concave-convex shape.