JP3865902B2 - Writing instrument caps - Google Patents

Writing instrument caps Download PDF

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Publication number
JP3865902B2
JP3865902B2 JP31621497A JP31621497A JP3865902B2 JP 3865902 B2 JP3865902 B2 JP 3865902B2 JP 31621497 A JP31621497 A JP 31621497A JP 31621497 A JP31621497 A JP 31621497A JP 3865902 B2 JP3865902 B2 JP 3865902B2
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JP
Japan
Prior art keywords
peripheral surface
cylinder
cap
writing instrument
outer cylinder
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.)
Expired - Fee Related
Application number
JP31621497A
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Japanese (ja)
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JPH11129684A (en
Inventor
伸雄 関根
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pilot Ink Co Ltd
Original Assignee
Pilot Ink Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pilot Ink Co Ltd filed Critical Pilot Ink Co Ltd
Priority to JP31621497A priority Critical patent/JP3865902B2/en
Publication of JPH11129684A publication Critical patent/JPH11129684A/en
Application granted granted Critical
Publication of JP3865902B2 publication Critical patent/JP3865902B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Description

【0001】
【発明の属する技術分野】
本発明は筆記具等のキャップに関する。 さらに詳細には、万一、幼児等が誤って飲み込んだとしても空気流通を可能とし、窒息を回避する筆記具等のキャップに関する。
【0002】
【従来の技術】
従来、内筒と外筒とがリブにより一体に連結された通気キャップにおいて、例えば、実開平4−100895号公報には、キャップを飲み込んだ時に空気流通を可能にし、且つ、空気通路にペン先を挿入してペン先を損傷させることを防止する目的で、外キャップ(本願の外筒に相当)の内部に密閉部を有する内キャップ(本願の内筒に相当)をリブ(本願の縦リブに相当)によって一体に連結し、該リブ間に空気通路を形成すると共に、内筒の開口端より下方側に連続に鍔を設け、前記鍔がリブの軸線上に設けられたスリットにより分割されてなる構成が開示されている。
【0003】
しかし、前記従来のキャップは、外キャップと内キャップの間を空気流通可能に連結するためのリブの構成、及びペン先を内方へガイドするための鍔を設ける構成のため、金型構造を複雑にすると共に、内キャップ内面の筆記具本体とのシール嵌合部に、リブによってヒケ(即ち、不均一な肉厚による成形不良)を発生させ、筆記具本体のペン先の密封を不完全(即ち、気密不良)にするおそれがある。その上、ペン先をキャップ内へ挿入させる際、ペン先を内方へガイドするための鍔の存在によって空気の流通抵抗が増加し、スムーズな空気流通が阻害されるおそれもある。
【0004】
【発明が解決しようとする課題】
本発明は前記従来の問題点を解決するものであって、金型構造が簡単であり、気密不良を生じさせず、ペン先の損傷を抑え、しかも、スムーズな空気流通が可能な筆記具等のキャップを提供しようとするものである。尚、本願発明において、上とはキャップ閉塞側を示し、下とはキャップ開口側を示す。
【0005】
【課題を解決するための手段】
(概要)
本発明筆記具等のキャップ1は、筆記具本体とシール嵌合する環状シール部31を内周面に備えた有底筒体よりなる内筒3の外周面と、両端を開放した外筒2の内周面とを、軸方向に延びる縦リブ4によって空気流通可能に一体に連結した合成樹脂成形体よりなる筆記具等のキャップ1であって、外筒2の内周面に軸方向に延びる複数本の縦リブ4を一体に設け、前記縦リブ4によって、外筒2の内周面と、環状シール部31の上方の内筒3の外周面とを一体に連結し、前記縦リブ4間に空気通路6を形成し、前記内筒3の環状シール部31の外周面と前記外筒2の内周面との間に環状の隙間5を設け、前記縦リブ4の下端を内筒3の開口端より下方に延設し、前記縦リブ4の下端を上方に向かうに従い内方へ傾斜するテーパ形状にし、前記縦リブ4の下端に、ペン先を内方へガイドするガイド部41を形成したこと(請求項1)を要件とする。
【0006】
外筒2の内周面と、環状シール部31の上方の内筒3の外周面とを縦リブ4によって一体に連結し、前記内筒3の環状シール部31の外周面と前記外筒2の内周面との間に環状の隙間5を設けたことによって、環状シール部31の径方向の肉厚を均一にし、環状シール部31におけるヒケの発生を抑え、内筒3と筆記具本体とのシール性能を満足させ、内筒3によりペン先を確実に密封できる。
【0007】
また、前記縦リブ4の下端を、内筒3の開口端より下方に延設したことによって、内筒3の開口端近傍の外周面と、外筒2の内周面の間の環状の隙間5を小さくできる。それにより、ペン先をキャップ1内に挿入させる際、ペン先が、前記縦リブ4の下端に当接すると共に内方へガイドされるため、ペン先が前記環状の隙間5に挿入され破損することを回避できる。即ち、縦リブ4の下端に、ペン先を内方へガイドするガイド部41を構成できる。
【0008】
また、前記縦リブ4によって、内筒3の外周面と外筒2の内周面の間の縦リブ4相互間に軸方向の通気通路6を形成すると同時に、ペン先を内方へガイドするガイド部41を構成したため、ペン先の破損を抑えることは勿論、金型構造が簡易となると同時に、キャップ1内を軸方向に貫通する円滑な空気の流通が可能となる。
【0010】
ン先をキャップ1内に挿入させる際、ペン先を縦リブ4の下端に当接させたとしても、前記テーパ形状の下端(即ち、ガイド部41)に沿ってペン先をスムーズに内筒3内に挿入させることができ、ペン先の損傷を、より一層、回避する。
【0011】
【発明の実施の形態】
本発明の実施の形態を図面に従って説明する。(図1〜図5参照)
図1は本発明の一実施例を示す縦断面図であり、図2は図1のA−A線断面図であり、図3は図1のB−B線断面図であり、図4は図1の平面図であり、図5は図1の底面図である。
【0012】
キャップ1は合成樹脂(例えばポリプロピレン)の射出成形体からなり、両端が開口した外筒2の内周面と、有底筒体よりなる内筒3の外周面とが、複数の縦リブ4により一体に連結されてなる。前記縦リブ4間には、軸方向の通気通路6が形成されている。
【0013】
前記外筒2は、両端が軸方向に開口した円筒状体であり、その内周面に、軸方向に延びる複数本(具体的には16本)の縦リブ4が一体に突設されている。一方、前記内筒3は、一端が閉鎖され他端が開口した円筒状有底筒体であり、開口端近傍の内周面に、環状突起よりなる環状シール部31が一体に突設されている。
【0014】
前記縦リブ4は、内筒3の環状シール部31より上方位置(即ち、環状シール部31を避ける位置)の外周面と、外筒2の内周面とに接続している。即ち、前記環状シール部31の外周面には、縦リブ4は形成されず、環状の隙間5が形成されるため、環状シール部31の径方向の肉厚を均一にすることができ、環状シール部31に成形時のヒケを生じさせない。
【0015】
前記縦リブ4の下端は、軸方向下方に延設され、内筒3の開口端より下方位置(即ち、内筒3の開口端と外筒2の開口端の間)の外筒2の内周面に位置している。前記縦リブ4の全ての下端は、軸方向上方に向かうに従って径方向内方へ傾斜するテーパ状に形成され、ペン先が当接した際のペン先を内方へガイドするガイド部41となっている。また、前記縦リブ4と縦リブ4の間の隙間は、ペン先の外径より十分に小さく設定されているため、そこにペン先を突き入れて破損させてしまうことがない。
【0016】
また、前記外筒2の内周面の、前記縦リブ4の下方には、4個の面状突起21が一体に形成されている。前記面状突起21は、筆記具本体のペン先側と嵌合した際のキャップ1のぐらつきを防止したり、筆記具本体の尾端側に後ろ差し嵌合した際の嵌合部となる。
【0017】
尚、本発明のキャップ1を構成する合成樹脂材料としては、例えば、ポリプロピレン、ポリエチレン、ポリカーボネート、ポリエチレンテレフタレート等が挙げられる。
【0018】
尚、本発明のキャップ1は、例えば、マーキングペン、サインペン、ボールペン、パイプペン、万年筆等の筆記具、あるいは、修正液、化粧液、接着剤等の塗布具に適用可能である。
【0019】
【発明の効果】
本発明の筆記具等のキャップは、請求項1の構成にしたことにより、金型構造が簡単となり、気密不良を生じさせず、ペン先の損傷を抑え、しかもスムーズな空気流通が可能となる。
【0020】
本発明の筆記具等のキャップは、請求項の構成にしたことにより、より一層、ペン先の挿入性を向上させ、ペン先の損傷を回避できる。
【図面の簡単な説明】
【図1】本発明の筆記具等のキャップの一実施例を示す縦断面図である。
【図2】図1のA−A線に沿う断面図である。
【図3】図1のB−B線に沿う断面図である。
【図4】図1の平面図である。
【図5】図1の底面図である。
【符号の説明】
1 キャップ
2 外筒
21 面状突起
3 内筒
31 環状シール部
4 縦リブ
41 ガイド部
5 環状の隙間
6 空気通路
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cap such as a writing instrument. More specifically, the present invention relates to a cap such as a writing instrument that allows air to flow even if an infant or the like accidentally swallows it and avoids suffocation.
[0002]
[Prior art]
Conventionally, in a ventilation cap in which an inner cylinder and an outer cylinder are integrally connected by a rib, for example, Japanese Utility Model Laid-Open No. 4-100955 discloses air circulation when a cap is swallowed, and a pen nib is placed in an air passage. The inner cap (corresponding to the inner cylinder of the present application) having a sealing portion inside the outer cap (corresponding to the outer cylinder of the present application) is provided with a rib (vertical rib of the present application). And an air passage is formed between the ribs, and a flange is continuously provided below the open end of the inner cylinder, and the flange is divided by a slit provided on the axis of the rib. The structure which consists of is disclosed.
[0003]
However, the conventional cap has a mold structure because of the structure of the rib for connecting the outer cap and the inner cap so that air can flow, and the structure of providing the hook for guiding the pen tip inward. In addition, the ribs cause sink marks (that is, molding defects due to uneven thickness) in the seal fitting portion between the inner cap inner surface and the writing instrument body, and the pen tip of the writing instrument body is not completely sealed (that is, , Airtightness). In addition, when the pen tip is inserted into the cap, the air flow resistance is increased due to the presence of a ridge for guiding the pen tip inward, and smooth air flow may be hindered.
[0004]
[Problems to be solved by the invention]
The present invention solves the above-mentioned conventional problems, such as a writing instrument that has a simple mold structure, does not cause an airtight defect, suppresses damage to the nib, and allows smooth air circulation. Try to provide a cap. In the present invention, the upper side indicates the cap closing side, and the lower side indicates the cap opening side.
[0005]
[Means for Solving the Problems]
(Overview)
The cap 1 of the writing instrument of the present invention includes an outer peripheral surface of an inner cylinder 3 formed of a bottomed cylindrical body having an annular seal portion 31 on the inner peripheral surface, which is fitted to the writing instrument body, and an inner portion of the outer cylinder 2 having both ends opened. A cap 1 such as a writing instrument made of a synthetic resin molded body integrally connected to a peripheral surface by longitudinal ribs 4 extending in the axial direction so as to allow air flow, and a plurality of caps extending in the axial direction on the inner peripheral surface of the outer cylinder 2 The vertical rib 4 is integrally provided, and the vertical rib 4 integrally connects the inner peripheral surface of the outer cylinder 2 and the outer peripheral surface of the inner cylinder 3 above the annular seal portion 31. An air passage 6 is formed, an annular gap 5 is provided between the outer peripheral surface of the annular seal portion 31 of the inner cylinder 3 and the inner peripheral surface of the outer cylinder 2, and the lower end of the vertical rib 4 is connected to the inner cylinder 3. and extending downward from the open end, the lower end of the longitudinal ribs 4 in a tapered shape inclined inwardly toward the top, the The lower end of the rib 4, to the formation of the guide portion 41 for guiding the nib inward (claim 1) and the requirements.
[0006]
The inner peripheral surface of the outer cylinder 2 and the outer peripheral surface of the inner cylinder 3 above the annular seal portion 31 are integrally connected by the vertical rib 4, and the outer peripheral surface of the annular seal portion 31 of the inner cylinder 3 and the outer cylinder 2 are connected. By providing the annular gap 5 with the inner peripheral surface of the inner seal 3, the radial thickness of the annular seal portion 31 is made uniform, the occurrence of sink marks in the annular seal portion 31 is suppressed, and the inner cylinder 3 and the writing instrument body The pen tip can be reliably sealed by the inner cylinder 3.
[0007]
Further, the lower end of the vertical rib 4 extends downward from the opening end of the inner cylinder 3 so that an annular gap between the outer peripheral surface near the opening end of the inner cylinder 3 and the inner peripheral surface of the outer cylinder 2 is obtained. 5 can be reduced. Thereby, when the pen tip is inserted into the cap 1, the pen tip contacts the lower end of the vertical rib 4 and is guided inward, so that the pen tip is inserted into the annular gap 5 and is damaged. Can be avoided. That is, a guide portion 41 that guides the pen tip inward can be formed at the lower end of the vertical rib 4.
[0008]
Further, the longitudinal rib 4 forms an axial ventilation passage 6 between the longitudinal ribs 4 between the outer peripheral surface of the inner cylinder 3 and the inner peripheral surface of the outer cylinder 2, and at the same time guides the pen tip inward. Since the guide portion 41 is configured, not only the breakage of the pen tip is suppressed, but also the mold structure is simplified, and at the same time, a smooth air flow penetrating through the cap 1 in the axial direction is possible.
[0010]
When inserting the pen location within the cap 1, even abut a pen tip at the lower end of the vertical ribs 4, the lower end of the tapered (i.e., the guide portion 41) inside the pen tip smoothly along the cylinder Can be inserted into the pen 3, and damage to the pen tip is further avoided.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. (See Figs. 1-5)
1 is a longitudinal sectional view showing an embodiment of the present invention, FIG. 2 is a sectional view taken along line AA in FIG. 1, FIG. 3 is a sectional view taken along line BB in FIG. FIG. 5 is a plan view of FIG. 1, and FIG. 5 is a bottom view of FIG.
[0012]
The cap 1 is made of a synthetic resin (for example, polypropylene) injection-molded body, and the inner peripheral surface of the outer cylinder 2 having both ends opened and the outer peripheral surface of the inner cylinder 3 made of a bottomed cylinder are formed by a plurality of vertical ribs 4. Connected together. Between the vertical ribs 4, axial ventilation passages 6 are formed.
[0013]
The outer cylinder 2 is a cylindrical body having both ends opened in the axial direction, and a plurality of (specifically, 16) longitudinal ribs 4 extending in the axial direction are integrally projected on the inner peripheral surface thereof. Yes. On the other hand, the inner cylinder 3 is a cylindrical bottomed cylinder whose one end is closed and the other end is opened, and an annular seal portion 31 made of an annular protrusion is integrally projected on the inner peripheral surface near the opening end. Yes.
[0014]
The vertical rib 4 is connected to the outer peripheral surface at a position above the annular seal portion 31 of the inner cylinder 3 (that is, the position avoiding the annular seal portion 31) and the inner peripheral surface of the outer cylinder 2. That is, since the vertical rib 4 is not formed on the outer peripheral surface of the annular seal portion 31 and the annular gap 5 is formed, the radial thickness of the annular seal portion 31 can be made uniform. The seal part 31 does not cause sink marks during molding.
[0015]
The lower end of the vertical rib 4 extends downward in the axial direction, and is located inside the outer cylinder 2 at a position below the opening end of the inner cylinder 3 (that is, between the opening end of the inner cylinder 3 and the opening end of the outer cylinder 2). Located on the circumference. All the lower ends of the vertical ribs 4 are formed in a tapered shape that is inclined inward in the radial direction toward the upper side in the axial direction, and serve as a guide portion 41 that guides the pen tip inward when the pen tip contacts. ing. Further, the gap between the vertical rib 4 and the vertical rib 4 is set to be sufficiently smaller than the outer diameter of the pen tip, so that the pen tip is not pushed into the pen tip and damaged.
[0016]
Further, four planar protrusions 21 are integrally formed on the inner peripheral surface of the outer cylinder 2 below the vertical rib 4. The said planar protrusion 21 becomes a fitting part at the time of preventing the wobbling of the cap 1 when fitted to the pen tip side of the writing instrument body or backwardly fitting to the tail end side of the writing instrument body.
[0017]
In addition, as a synthetic resin material which comprises the cap 1 of this invention, a polypropylene, polyethylene, a polycarbonate, a polyethylene terephthalate etc. are mentioned, for example.
[0018]
The cap 1 of the present invention can be applied to, for example, a writing instrument such as a marking pen, a sign pen, a ballpoint pen, a pipe pen, and a fountain pen, or an applicator such as a correction liquid, a cosmetic liquid, and an adhesive.
[0019]
【The invention's effect】
The cap of the writing instrument or the like according to the present invention has the structure of the first aspect, so that the mold structure is simplified, the airtightness is not deteriorated, the nib is prevented from being damaged, and the smooth air circulation is enabled.
[0020]
The cap of the writing instrument or the like according to the present invention has the configuration of claim 1 , so that the pen tip insertion property can be further improved and damage to the pen tip can be avoided.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing an embodiment of a cap of a writing instrument or the like according to the present invention.
FIG. 2 is a cross-sectional view taken along line AA in FIG.
3 is a cross-sectional view taken along line BB in FIG.
4 is a plan view of FIG. 1. FIG.
FIG. 5 is a bottom view of FIG. 1;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cap 2 Outer cylinder 21 Planar protrusion 3 Inner cylinder 31 Annular seal part 4 Vertical rib 41 Guide part 5 Annular gap 6 Air passage

Claims (1)

筆記具本体とシール嵌合する環状シール部(31)を内周面に備えた有底筒体よりなる内筒(3)の外周面と、両端を開放した外筒(2)の内周面とを、軸方向に延びる縦リブ(4)によって空気流通可能に一体に連結した合成樹脂成形体よりなる筆記具等のキャップ(1)であって、外筒(2)の内周面に軸方向に延びる複数本の縦リブ(4)を一体に設け、前記縦リブ(4)によって、外筒(2)の内周面と、環状シール部(31)の上方の内筒(3)の外周面とを一体に連結し、前記縦リブ(4)間に空気通路(6)を形成し、前記内筒(3)の環状シール部(31)の外周面と前記外筒(2)の内周面との間に環状の隙間(5)を設け、前記縦リブ(4)の下端を内筒(3)の開口端より下方に延設し、前記縦リブ(4)の下端を上方に向かうに従い内方へ傾斜するテーパ形状にし、前記縦リブ(4)の下端に、ペン先を内方へガイドするガイド部(41)を形成したことを特徴とする筆記具等のキャップ。An outer peripheral surface of an inner cylinder (3) made of a bottomed cylindrical body having an annular seal portion (31) fitted to the writing instrument body on the inner peripheral surface, and an inner peripheral surface of an outer cylinder (2) having both ends opened; Is a cap (1) such as a writing instrument made of a synthetic resin molded body integrally connected so as to be able to flow air by a longitudinal rib (4) extending in the axial direction, and is axially formed on the inner peripheral surface of the outer cylinder (2). A plurality of extending vertical ribs (4) are integrally provided, and the vertical rib (4) allows the inner peripheral surface of the outer cylinder (2) and the outer peripheral surface of the inner cylinder (3) above the annular seal portion (31). Are integrally connected, an air passage (6) is formed between the vertical ribs (4), an outer peripheral surface of the annular seal portion (31) of the inner cylinder (3) and an inner periphery of the outer cylinder (2). an annular gap (5) between the surface provided, wherein the vertical lower end of the rib (4) extending downward from the open end of the inner cylinder (3), on the lower end of the longitudinal ribs (4) The tapered inclined inwardly toward the, the the lower end of the longitudinal ribs (4), a cap, such as writing instruments, characterized in that formed guide portion for guiding the pen tip inwardly (41).
JP31621497A 1997-10-31 1997-10-31 Writing instrument caps Expired - Fee Related JP3865902B2 (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
JP31621497A JP3865902B2 (en) 1997-10-31 1997-10-31 Writing instrument caps

Publications (2)

Publication Number Publication Date
JPH11129684A JPH11129684A (en) 1999-05-18
JP3865902B2 true JP3865902B2 (en) 2007-01-10

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JP4493802B2 (en) * 2000-05-25 2010-06-30 三菱鉛筆株式会社 Cap for writing instruments

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