JP2003220786A - Ball-point pen - Google Patents
Ball-point penInfo
- Publication number
- JP2003220786A JP2003220786A JP2002021926A JP2002021926A JP2003220786A JP 2003220786 A JP2003220786 A JP 2003220786A JP 2002021926 A JP2002021926 A JP 2002021926A JP 2002021926 A JP2002021926 A JP 2002021926A JP 2003220786 A JP2003220786 A JP 2003220786A
- Authority
- JP
- Japan
- Prior art keywords
- tip
- holder
- spring
- ball
- hole
- 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.)
- Pending
Links
Landscapes
- Pens And Brushes (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はボールペンに関す
る。詳細には、筆記先端部のボールを前方に押圧し且つ
該ボールを先端縁部の内面に密接させるスプリングを備
えたボールペンに関する。TECHNICAL FIELD The present invention relates to a ballpoint pen. More specifically, the present invention relates to a ballpoint pen including a spring that presses a ball at the tip of a writing part forward and brings the ball into close contact with the inner surface of the tip edge.
【０００２】[0002]
【従来の技術】従来、この種のボールペンにおいて、例
えば、実用新案登録第２５７７５４４号公報、特開平１
０−８６５８４号公報等には、スプリングをストレート
部とコイル部により一体に形成し、前記コイル部をチッ
プ本体後方に配置し、前記ストレート部をチップ本体内
に挿通し、前記ストレート部の先端によりボールを前方
に押圧し、さらに、前記ホルダーの内部に、チップ本体
外面が圧入固着される取付孔と、該取付孔と連通し且つ
該取付孔より小径の連通孔と、該連通孔と連通し且つ該
連通孔より大径のインキ流通孔とを備え、前記インキ流
通孔の先端に円錐面状のテーパ部を形成した構成が開示
されている。2. Description of the Related Art Conventionally, in this type of ball-point pen, for example, Utility Model Registration No. 2577744 and Japanese Patent Laid-Open No. 1-751 are available.
No. 0-86584 discloses that a spring is integrally formed by a straight portion and a coil portion, the coil portion is arranged at the rear of the chip body, the straight portion is inserted into the chip body, and the tip of the straight portion is formed. The ball is pressed forward, and further, the mounting hole into which the outer surface of the chip body is press-fitted and fixed in the holder, the communication hole with the mounting hole, and the communication hole having a diameter smaller than the mounting hole, and the communication hole Further, there is disclosed a configuration in which an ink circulation hole having a diameter larger than that of the communication hole is provided, and a conical tapered portion is formed at the tip of the ink circulation hole.
【０００３】ところが、前記従来のボールペンは、前記
テーパ部の角度が大きく、ホルダー後方から前方にスプ
リングを挿入する際、スプリングのストレート部の先端
が前記テーパ部に引っ掛かりやすく、スプリングの組立
不良が発生するおそれがある。However, in the conventional ball-point pen, the angle of the taper portion is large, and when the spring is inserted from the rear side of the holder to the front side, the tip of the straight portion of the spring is apt to be caught in the taper portion, resulting in defective spring assembly. May occur.
【０００４】特に、スプリングの線径が小さい場合、ス
プリング全体の重量が小さくなり、スプリングを落下に
よってホルダー内部に挿入する際、スプリングのストレ
ート部の先端がテーパ部に引っ掛かりることが、より一
層、発生しやすくなる。In particular, when the wire diameter of the spring is small, the weight of the spring as a whole becomes small, and when the spring is inserted into the holder by dropping, the tip of the straight portion of the spring may be caught by the taper portion. It tends to occur.
【０００５】[0005]
【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、ホルダー内にスプリング
を挿入する際、スプリングのストレート部がホルダー内
面に引っ掛かるおそれがなく、スプリングの組立不良の
発生を抑えることが可能なボールペンを提供しようとす
るものである。SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art. When inserting a spring into a holder, the straight portion of the spring does not get caught on the inner surface of the holder, and the spring is assembled. An object of the present invention is to provide a ballpoint pen capable of suppressing the occurrence of defects.
【０００６】[0006]
【課題を解決するための手段】〔１〕本発明のボールペ
ン１は、先端にボール２１が内向きの先端縁部２２によ
り回転可能に抱持されたチップ本体２と、該チップ本体
２の後部外面を保持するホルダー３と、該ボール２１を
前方に押圧し該ボール２１を先端縁部２２の内面に密接
させるスプリング４とを備え、前記スプリング４が、チ
ップ本体２の内部に挿通されるストレート部４１と、該
ストレート部４１の後端と一体に連設され且つチップ本
体２の後方に配置されるコイル部４２とを備えるボール
ペン１であって、前記ホルダー３の内部に、前記チップ
本体２の後部外面が圧入固着される取付孔３１と、該取
付孔３１の後端と連通し且つ該取付孔３１より小径の連
通孔３２と、該連通孔３２の後端と連通し且つ該連通孔
３２より大径のインキ流通孔３３とを備え、前記インキ
流通孔３３の先端に円錐面状のテーパ部３３ａを形成
し、前記テーパ部３３ａの角度αを５度〜９０度に設定
したこと（請求項１）を要件とする。[1] A ball-point pen 1 of the present invention comprises a tip body 2 having a ball 21 rotatably held at its tip by an inward tip edge portion 22, and a rear portion of the tip body 2. A holder 3 for holding the outer surface and a spring 4 for pressing the ball 21 forward to bring the ball 21 into close contact with the inner surface of the tip edge portion 22 are provided. The spring 4 is inserted into the chip body 2 in a straight shape. A ball-point pen (1) comprising a part (41) and a coil part (42) which is continuously provided integrally with the rear end of the straight part (41) and is arranged behind the tip body (2), wherein the tip body (2) is inside the holder (3). The rear outer surface of the rear portion is press-fitted and fixed, the mounting hole 31 communicates with the rear end of the mounting hole 31, and the communication hole 32 has a smaller diameter than the mounting hole 31, and the communication hole 32 communicates with the rear end of the communication hole 32. A larger than 32 The ink passage hole 33 is provided with a conical tapered portion 33a at the tip of the ink passage hole 33, and the angle α of the tapered portion 33a is set to 5 degrees to 90 degrees (claim 1). As a requirement.
【０００７】前記テーパ部３３ａの角度αを５度〜９０
度（好ましくは１０度〜６０度）の範囲に設定したこと
により、スプリング４をホルダー３の内部に後方から挿
入した際、前記テーパ部３３ａによりストレート部４１
の先端が連通孔３２に円滑にガイドされ、ストレート部
４１の先端がテーパ部３３ａに引っ掛かるおそれがな
く、スプリング４の組み立て不良の発生を抑えることが
でき、その上、インキ流通孔３３内部での十分なインキ
流通性を確保できる。The angle α of the tapered portion 33a is 5 degrees to 90 degrees.
When the spring 4 is inserted into the holder 3 from the rear side, the straight portion 41 is formed by the taper portion 33a by setting the degree in the range of 10 degrees (preferably 10 degrees to 60 degrees).
The tip of the spring 4 is smoothly guided to the communication hole 32, there is no risk of the tip of the straight portion 41 being caught in the taper portion 33a, the occurrence of assembly failure of the spring 4 can be suppressed, and furthermore, the inside of the ink circulation hole 33 can be prevented. Sufficient ink distribution can be secured.
【０００８】前記テーパ部３３ａの角度αが５度より小
さい場合、テーパ部３３の先端に、ストレート部４１の
先端が引っ掛かりやすい大きな段差が形成されがちであ
ったり、前記段差を小さく設定したとしても、連通孔３
２と接続されるインキ流通孔３３の内径を大きく設定で
きず、十分なインキ流通性が確保できないおそれがあ
る。また、前記テーパ部３３ａの角度αが９０度より大
きい場合、前記テーパ部３３ａにスプリング４のストレ
ート部４１が引っ掛かりやすい。ここで、「テーパ部」
とは、後方に向かうに従い拡径する円錐面状の内面を言
い、「テーパ部の角度」とは、テーパ部３３ａの対向面
のなす角度のことを言う。尚、前記ホルダー３は、別部
材のインキ収容管と接続されてもよいし、後部に筒状の
インキ収容部が一体に連設されてもよい。When the angle α of the taper portion 33a is smaller than 5 degrees, a large step is likely to be formed at the tip of the taper portion 33 so that the tip of the straight portion 41 is easily caught, or even if the step is set small. , Communication hole 3
There is a possibility that the inner diameter of the ink circulation hole 33 connected to 2 cannot be set large and sufficient ink circulation property cannot be secured. When the angle α of the tapered portion 33a is larger than 90 degrees, the straight portion 41 of the spring 4 is easily caught by the tapered portion 33a. Where "tapered part"
Refers to the inner surface of a conical surface that increases in diameter toward the rear, and the "angle of the tapered portion" refers to the angle formed by the facing surfaces of the tapered portion 33a. In addition, the holder 3 may be connected to an ink containing tube which is a separate member, or a cylindrical ink containing portion may be integrally connected to a rear portion of the holder 3.
【０００９】〔２〕前記請求項１において、ホルダー３
を合成樹脂の射出成形により構成し、テーパ部３３ａの
先端に段部３３ｂを形成し、前記段部３３ｂの径方向の
深さＤを０．１ｍｍ〜０．２ｍｍの範囲とすること（請
求項２）が好ましい。[2] In the above claim 1, the holder 3
Is formed by injection molding of synthetic resin, a step portion 33b is formed at the tip of the tapered portion 33a, and the radial depth D of the step portion 33b is set in the range of 0.1 mm to 0.2 mm. 2) is preferred.
【００１０】前記ホルダー３を合成樹脂の射出成形によ
り得る場合、図５に示すように、通常、ホルダー３の内
部を成形する金型のコアピンが、分離可能な第１のコア
ピン７と第２のコアピン８からなる。そして、前記第１
のコアピン７が、成形品のホルダー３の前方へ抜かれ、
取付孔３１及び連通孔３２を成形し、前記第２のコアピ
ン８が、前記第１のコアピン７の後端部と嵌合可能な挿
入孔８１を先端面に備えると共に、成形品のホルダー３
の後方へ抜かれ、テーパ部３３ａを有するインキ流通孔
３３を成形する。When the holder 3 is obtained by injection molding of synthetic resin, as shown in FIG. 5, the core pin of the mold for molding the inside of the holder 3 is usually divided into a separable first core pin 7 and a second core pin 7. It consists of core pins 8. And the first
Core pin 7 of is pulled out to the front of the molded product holder 3,
The mounting hole 31 and the communication hole 32 are molded, and the second core pin 8 has an insertion hole 81 which can be fitted to the rear end portion of the first core pin 7 at the front end surface thereof, and the holder 3 of the molded product.
To form an ink circulation hole 33 having a tapered portion 33a.
【００１１】その際、前記段部３３ｂの径方向の深さＤ
が、０．１ｍｍより小さい場合、第２のコアピン８の先
端が、テーパ部３３ａを成形するために先鋭化され、薄
肉となり、その強度が不十分となるため、第２のコアピ
ン８の耐久性が低下するおそれがある。一方、前記段部
３３ｂの径方向の深さＤが、０．２ｍｍより大きい場
合、ストレート部４１の先端が段部３３ｂに引っ掛かり
やすくなり、組立不良を発生させるおそれがある。At this time, the radial depth D of the stepped portion 33b.
Is less than 0.1 mm, the tip of the second core pin 8 is sharpened to form the tapered portion 33a, becomes thin, and its strength becomes insufficient, so that the durability of the second core pin 8 is reduced. May decrease. On the other hand, when the radial depth D of the step portion 33b is larger than 0.2 mm, the tip of the straight portion 41 is likely to be caught by the step portion 33b, which may cause assembly failure.
【００１２】即ち、テーパ部３３ａの先端に、径方向の
深さＤが０．１ｍｍ〜０．２ｍｍの段部３３ｂを形成し
たこと（請求項２）により、ストレート部４１の先端が
段部３３ｂに引っ掛かることを十分に防止できると共
に、金型の耐久性を低下させることがない。ここで、
「段部」とは、テーパ部３３の先端の内径が連通孔３２
の後端の内径より僅かに大きく設定されることにより、
連通孔３２の後端とテーパ部３３ａの先端との間に形成
される段差のことを言い、「段部の径方向の深さ」と
は、前記段差の片側の径方向の寸法を言う。That is, since the step portion 33b having a radial depth D of 0.1 mm to 0.2 mm is formed at the tip of the taper portion 33a (claim 2), the tip of the straight portion 41 is made to be the step portion 33b. It is possible to sufficiently prevent the metal mold from being caught in the mold, and the durability of the mold is not deteriorated. here,
“Step” means that the inner diameter of the tip of the tapered portion 33 is the communication hole 32.
By being set slightly larger than the inner diameter of the rear end,
It means a step formed between the rear end of the communication hole 32 and the tip of the tapered portion 33a, and the "radial depth of the step portion" means the radial dimension of one side of the step.
【００１３】〔３〕前記請求項１または２において、ス
プリング４の線径が０．２ｍｍ以下であること（請求項
３）が好ましい。[3] In claim 1 or 2, it is preferable that the wire diameter of the spring 4 is 0.2 mm or less (claim 3).
【００１４】スプリング４の線径が０．２ｍｍ以下であ
る場合（請求項３の場合）、スプリング４全体の重さが
軽量となり、スプリング４を落下によりホルダー３内に
挿入する際、ストレート部４１の先端がテーパ部３３ａ
や段部３３ｂに引っ掛かりやすい。しかし、請求項３
は、前記請求項１または請求項２の構成と相まって、ス
プリング４の線径が０．２ｍｍ以下であっても、前記引
っ掛かりを十分に回避できる。尚、前記スプリング４の
線径は、０．１ｍｍより大きいことが、スプリング４の
製造上、好ましい。When the wire diameter of the spring 4 is 0.2 mm or less (Claim 3), the weight of the spring 4 as a whole becomes light, and when the spring 4 is dropped and inserted into the holder 3, the straight portion 41 is used. The tip of the taper 33a
It is easy to get caught in the step 33b. However, claim 3
In combination with the structure of claim 1 or claim 2, the catching can be sufficiently avoided even if the wire diameter of the spring 4 is 0.2 mm or less. The wire diameter of the spring 4 is preferably larger than 0.1 mm in terms of manufacturing the spring 4.
【００１５】[0015]
【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。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings.
【００１６】図１乃至図４に本発明の一実施例を示す。
本実施例のボールペン１は、先端にボール２１を回転可
能に抱持したチップ本体２と、該チップ本体２の後部が
前部に圧入固着されたホルダー３と、該ホルダー３の後
部が先端開口部に圧入固着されたインキ収容管５と、前
記チップ本体２の内部及びホルダー３の内部に収容配置
されるスプリング４と、前記インキ収容管５の後端開口
部に圧入固着される尾栓６とからなる。1 to 4 show an embodiment of the present invention.
The ball-point pen 1 of the present embodiment has a tip body 2 rotatably holding a ball 21 at its tip, a holder 3 in which the rear portion of the tip body 2 is press-fitted and fixed in the front portion, and the rear portion of the holder 3 has a tip opening. Ink storage tube 5 press-fitted and fixed to the portion, spring 4 accommodated and arranged inside the tip body 2 and holder 3, and tail plug 6 press-fitted and fixed to the rear end opening of the ink storage tube 5. Consists of.
【００１７】前記インキ収容管５は、両端が開口された
円筒体であり、合成樹脂の押出成形により得られる。前
記インキ収容管５の先端開口部には、チップ本体２を有
するホルダー３の後部が圧入固着され、一方、前記イン
キ収容管５の後端開口部には、通気孔が貫設された尾栓
６が圧入固着される。前記インキ収容管５の内部には、
インキ５１（例えば、剪断減粘性が付与された水性ゲル
インキ、または中粘度の油性インキ）と、該インキ５１
の後端に配置され且つ該インキ５１の消費に伴って前進
するグリス状の追従体５２とが充填される。The ink containing tube 5 is a cylindrical body having both ends opened and is obtained by extrusion molding of synthetic resin. The rear portion of the holder 3 having the chip body 2 is press-fitted and fixed to the tip opening portion of the ink containing tube 5, while the tail plug having a vent hole penetrating the rear end opening portion of the ink containing tube 5. 6 is press-fitted and fixed. Inside the ink containing tube 5,
Ink 51 (for example, water-based gel ink imparted with shear thinning viscosity or medium viscosity oil-based ink), and the ink 51
It is filled with a grease-like follower 52 which is arranged at the rear end and which advances as the ink 51 is consumed.
【００１８】前記チップ本体２は、金属製（例えば、Ｓ
ＵＳ３０４、ＳＵＳ３２１等のオーステナイト系のステ
ンレス鋼製）の直円筒状の細管よりなる。前記チップ本
体２の先端部には、内方への押圧変形により環状の内向
きの先端縁部２２が形成される。さらに、前記先端縁部
２２の後方のチップ本体２の側壁内面には、内方への押
圧変形により３個の内方突出部２３（即ちボール受け
座）が周方向等間隔に形成される。前記先端縁部２２内
面と前記内方突出部２３前面との間（即ちボール抱持
部）にボール２１が回転可能に抱持される。The chip body 2 is made of metal (for example, S
It is made of a right cylindrical thin tube made of austenitic stainless steel such as US304 and SUS321. An annular inward tip edge portion 22 is formed at the tip portion of the tip body 2 by inward pressing deformation. Further, on the inner surface of the side wall of the chip body 2 behind the tip edge portion 22, three inward projecting portions 23 (that is, ball receiving seats) are formed at equal intervals in the circumferential direction by inward pressing deformation. The ball 21 is rotatably held between the inner surface of the tip edge portion 22 and the front surface of the inward protruding portion 23 (that is, the ball holding portion).
【００１９】前記ホルダー３は、合成樹脂（例えば、ポ
リプロピレン、ポリアセタール等）の射出成形により得
られる筒状体である。前記ホルダー３は、チップ本体２
が取付られる先細状の前部と、インキ収容管５の先端面
と当接する鍔部と、インキ収容管５の先端開口部に圧入
される後部とからなる。前記ホルダー３の内部には、チ
ップ本体２が圧入固着される取付孔３１と、該取付孔３
１後端と連通し且つ該取付孔３１後端より小径の連通孔
３２と、該連通孔３２後端と連通し且つ該連通孔３２よ
り小径のインキ流通孔３３とが形成される。また、前記
取付孔３１の後端と前記連通孔３２の先端との間には、
段部が形成され、該段部によりチップ本体２の後端が軸
方向に当接支持される。The holder 3 is a cylindrical body obtained by injection molding of synthetic resin (eg polypropylene, polyacetal, etc.). The holder 3 is a chip body 2
A front part having a tapered shape, a collar part that comes into contact with the front end surface of the ink containing tube 5, and a rear part that is press-fitted into the front end opening part of the ink containing tube 5. Inside the holder 3, a mounting hole 31 into which the chip body 2 is press-fitted and fixed, and the mounting hole 3
A communication hole 32 communicating with the rear end of the mounting hole 31 and having a diameter smaller than the rear end of the mounting hole 31 and an ink circulation hole 33 communicating with the rear end of the communication hole 32 and having a diameter smaller than the communication hole 32 are formed. Further, between the rear end of the mounting hole 31 and the front end of the communication hole 32,
A step portion is formed, and the rear end of the chip body 2 is axially abutted and supported by the step portion.
【００２０】前記インキ流通孔３３の先端には、円錐面
状のテーパ部３３ａが形成され、前記テーパ部３３ａの
角度αが、１５度に設定される。また、前記テーパ部３
３ａの先端と前記連通孔３２の後端との間には、段部３
３ｂが形成され、前記段部３３ｂの径方向の深さＤが、
０．１８５ｍｍに設定される。前記テーパ部３３ａ の
角度α及び段部３３ｂの径方向の深さＤにより、スプリ
ング４をホルダー３の内部に挿入組付する際、スプリン
グ４のストレート部４１の先端が、テーパ部３３ａまた
は段部３３ｂに引っ掛かることがなく、円滑な組立工程
が維持され、組立不良の発生を抑えることができる。A conical tapered portion 33a is formed at the tip of the ink circulation hole 33, and the angle α of the tapered portion 33a is set to 15 degrees. Also, the taper portion 3
Between the tip of 3a and the rear end of the communication hole 32, a stepped portion 3 is formed.
3b is formed, and the radial depth D of the stepped portion 33b is
It is set to 0.185 mm. Due to the angle α of the tapered portion 33a and the radial depth D of the stepped portion 33b, when the spring 4 is inserted and assembled in the holder 3, the tip of the straight portion 41 of the spring 4 may be the tapered portion 33a or the stepped portion. 33b is not caught, a smooth assembly process is maintained, and the occurrence of assembly failure can be suppressed.
【００２１】前記インキ流通孔３３の中間部内面には、
周状に分散配置される複数（例えば４個）のバネ係止用
の突起３３ｃが一体に形成される。On the inner surface of the intermediate portion of the ink circulation hole 33,
A plurality (for example, four) of spring-locking projections 33c that are dispersedly arranged in a circumferential shape are integrally formed.
【００２２】前記スプリング４は、線径０．１４ｍｍの
ステンレス鋼製線材により、前部のストレート部４１
と、後部のコイル部４２とが一体に連設されてなる。前
記コイル部４２の後端部には、前方のコイル部４２の外
径よりも大きい外径を有する密着巻部よりなる大径部４
２ａが形成される。さらに、前記大径部４２ａの後方に
は、密着巻部よりなる小径部４２ｂが一体に連設され
る。The spring 4 is made of a stainless steel wire material having a wire diameter of 0.14 mm and is made of a straight part 41 at the front.
And the rear coil portion 42 are integrally connected. At the rear end of the coil portion 42, a large-diameter portion 4 including a close-wound portion having an outer diameter larger than the outer diameter of the front coil portion 42.
2a is formed. Further, behind the large diameter portion 42a, a small diameter portion 42b composed of a tightly wound portion is integrally provided.
【００２３】前記スプリング４の大径部４２ａは、ホル
ダー３内面の突起３３ｃと乗り越え係止され、その前方
のコイル部４２を圧縮状態でホルダー３内に収容配置さ
れる。そして、前記スプリング４のストレート部４１
が、チップ本体２内に挿入され、その先端をボール２１
後面に当接させ、ボール２１を前方に押圧し、ボール２
１前面と先端縁部２２内面とを環状に密接させる。The large-diameter portion 42a of the spring 4 rides over and is engaged with the protrusion 33c on the inner surface of the holder 3, and the coil portion 42 in front of the large-diameter portion 42a is accommodated in the holder 3 in a compressed state. Then, the straight portion 41 of the spring 4
Is inserted into the chip body 2, and the tip of the ball 21
The ball 21 is brought into contact with the rear surface to press the ball 21 forward,
1 The front surface and the inner surface of the tip edge portion 22 are closely contacted in an annular shape.
【００２４】
本実施例のボールペン１は、非筆記
時、前記スプリング４のストレート部４１によりボール
２１が前方に押圧され、前記ボール２１と前記先端縁部
２２の内面とが密接され、それにより、ペン先がシール
される。それにより、ペン先を下向き状態で保管したと
しても、ペン先からのインキ漏出が防止され、また、ペ
ン先を上向き状態で保管したとしても、ペン先からの空
気混入が防止される。[0024]
In the ball-point pen 1 of the present embodiment, when not writing, the ball 21 is pressed forward by the straight portion 41 of the spring 4, and the ball 21 and the inner surface of the tip edge portion 22 are brought into close contact with each other. Sealed. This prevents ink from leaking from the pen tip even if the pen tip is stored facing downward, and prevents air from entering from the pen tip even when storing the pen tip facing upward.
【００２５】図５に、ホルダー３の内部を成形する金型
のコアピンを示す。前記コアピンは、成形品のホルダー
３の前方へ抜かれる第１のコアピン７と、成形品のホル
ダー３の後方へ抜かれる第２のコアピン８からなり、前
記第１のコアピン７により、取付孔３１及び連通孔３２
が成形され、前記第２のコアピン８により、テーパ部３
３ａを有するインキ流通孔３３が成形される。前記第２
のコアピン８の先端面には、前記第１のコアピン７の後
端部が嵌合可能な挿入孔８１が開口される。前記第２の
コアピン８の先端は、ホルダー３の段部３３ｂを成形す
るための肉厚を有し、金型の耐久性を低下させるおそれ
がない。FIG. 5 shows core pins of a mold for molding the inside of the holder 3. The core pin is composed of a first core pin 7 that is pulled out to the front of the molded product holder 3 and a second core pin 8 that is pulled out to the rear of the molded product holder 3. With the first core pin 7, the mounting hole 31 And communication hole 32
And the tapered portion 3 is formed by the second core pin 8.
The ink circulation hole 33 having 3a is formed. The second
An insertion hole 81 into which the rear end portion of the first core pin 7 can be fitted is opened in the tip end surface of the core pin 8. The tip of the second core pin 8 has a thickness for molding the stepped portion 33b of the holder 3, and there is no fear of lowering the durability of the mold.
【００２６】[0026]
【発明の効果】請求項１の発明により、ホルダー内にス
プリングを挿入する際、スプリングのストレート部の先
端がテーパ部に引っ掛かるおそれがなく、スプリングの
組立不良の発生を抑えることができ、その上、インキ流
通孔内での十分なインキ流通性を確保できる。According to the first aspect of the present invention, when the spring is inserted into the holder, the tip of the straight portion of the spring is not likely to be caught by the taper portion, and the occurrence of spring assembly failure can be suppressed. It is possible to secure sufficient ink flowability in the ink flow holes.
【００２７】請求項２の発明により、ストレート部の先
端が段部に引っ掛かることを十分に防止できると共に、
金型の耐久性を低下させることがない。According to the second aspect of the present invention, the tip of the straight portion can be sufficiently prevented from being caught by the step portion, and
Does not reduce the durability of the mold.
【００２８】請求項３の発明により、スプリングの線径
が０．２ｍｍ以下であっても、ストレート部の先端がテ
ーパ部や段部に引っ掛かることを十分に回避できる。According to the third aspect of the invention, even if the wire diameter of the spring is 0.2 mm or less, it is possible to sufficiently prevent the tip of the straight portion from being caught by the taper portion or the step portion.
【図１】本発明の一実施例を示す縦断面図である。FIG. 1 is a vertical sectional view showing an embodiment of the present invention.
【図２】図１のホルダーの拡大縦断面図である。FIG. 2 is an enlarged vertical sectional view of the holder shown in FIG.
【図３】図１のホルダー内にスプリングを挿入する際の
拡大縦断面図である。FIG. 3 is an enlarged vertical sectional view when inserting a spring into the holder of FIG.
【図４】図３のＡ部拡大図である。FIG. 4 is an enlarged view of part A of FIG.
【図５】図１のホルダー内部を成形するためのコアピン
を示す縦断面図である。5 is a longitudinal sectional view showing a core pin for molding the inside of the holder of FIG. 1. FIG.
１ ボールペン ２ チップ本体 ２１ ボール ２２ 先端縁部 ２３ 内方突出部 ３ ホルダー ３１ 取付孔 ３２ 連通孔 ３３ インキ流通孔 ３３ａ テーパ部 ３３ｂ 段部 ３３ｃ 突起 ４ スプリング ４１ ストレート部 ４２ コイル部 ４２ａ 大径部 ４２ｂ 小径部 ５ インキ収容管 ５１ インキ ５２ 追従体 ６ 尾栓 ７ 第１のコアピン ８ 第２のコアピン ８１ 挿入孔 α テーパ部の角度 Ｄ 段部の径方向の深さ 1 ballpoint pen 2 chip body 21 balls 22 Tip edge 23 Inward projection 3 holder 31 mounting holes 32 communication holes 33 Ink circulation hole 33a taper part 33b step 33c protrusion 4 spring 41 Straight part 42 coil 42a Large diameter part 42b Small diameter part 5 Ink storage tube 51 ink 52 Follower 6 tail plugs 7 First core pin 8 Second core pin 81 insertion hole α taper angle D step depth in the radial direction
Claims (3)
転可能に抱持されたチップ本体と、該チップ本体の後部
外面を保持するホルダーと、該ボールを前方に押圧し該
ボールを先端縁部の内面に密接させるスプリングとを備
え、前記スプリングが、チップ本体の内部に挿通される
ストレート部と、該ストレート部の後端と一体に連設さ
れ且つチップ本体の後方に配置されるコイル部とを備え
るボールペンであって、前記ホルダーの内部に、前記チ
ップ本体の後部外面が圧入固着される取付孔と、該取付
孔の後端と連通し且つ該取付孔より小径の連通孔と、該
連通孔の後端と連通し且つ該連通孔より大径のインキ流
通孔とを備え、前記インキ流通孔の先端に円錐面状のテ
ーパ部を形成し、前記テーパ部の角度を５度〜９０度に
設定したことを特徴とするボールペン。1. A tip body having a ball rotatably held at its tip by an inward tip edge portion, a holder for holding a rear outer surface of the tip body, and a tip for pushing the ball forward. A coil that is provided in close contact with the inner surface of the edge portion, the spring being a straight portion that is inserted into the inside of the chip body, and a coil that is integrally connected to the rear end of the straight portion and that is arranged behind the chip body. A ball-point pen having a portion, a mounting hole into which the rear outer surface of the chip body is press-fitted and fixed, and a communication hole communicating with the rear end of the mounting hole and having a diameter smaller than the mounting hole, inside the holder. An ink circulation hole that is in communication with the rear end of the communication hole and has a diameter larger than that of the communication hole is provided, and a conical tapered portion is formed at the tip of the ink circulation hole, and the angle of the tapered portion is 5 degrees to Specially set to 90 degrees Ballpoint pen to.
構成し、前記テーパ部の先端に段部を形成し、前記段部
の径方向の深さを０．１ｍｍ〜０．２ｍｍに設定した請
求項１記載のボールペン。2. The holder is formed by injection molding of synthetic resin, a step portion is formed at the tip of the tapered portion, and the radial depth of the step portion is set to 0.1 mm to 0.2 mm. Item 1. A ball-point pen according to item 1.
ある請求項１または２記載のボールペン。3. The ballpoint pen according to claim 1, wherein the wire diameter of the spring is 0.2 mm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002021926A JP2003220786A (en) | 2002-01-30 | 2002-01-30 | Ball-point pen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002021926A JP2003220786A (en) | 2002-01-30 | 2002-01-30 | Ball-point pen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003220786A true JP2003220786A (en) | 2003-08-05 |
Family
ID=27745032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002021926A Pending JP2003220786A (en) | 2002-01-30 | 2002-01-30 | Ball-point pen |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003220786A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009029057A (en) * | 2007-07-27 | 2009-02-12 | Pentel Corp | Ball-point pen |
| JP2010076411A (en) * | 2008-08-27 | 2010-04-08 | Pentel Corp | Method for manufacturing ballpoint pen tip |
| JP2013006273A (en) * | 2011-06-22 | 2013-01-10 | Pilot Corporation | Ballpoint pen refill |
-
2002
- 2002-01-30 JP JP2002021926A patent/JP2003220786A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009029057A (en) * | 2007-07-27 | 2009-02-12 | Pentel Corp | Ball-point pen |
| JP2010076411A (en) * | 2008-08-27 | 2010-04-08 | Pentel Corp | Method for manufacturing ballpoint pen tip |
| JP2013006273A (en) * | 2011-06-22 | 2013-01-10 | Pilot Corporation | Ballpoint pen refill |
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