JP5576759B2 - Ballpoint pen - Google Patents

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JP5576759B2
JP5576759B2 JP2010235970A JP2010235970A JP5576759B2 JP 5576759 B2 JP5576759 B2 JP 5576759B2 JP 2010235970 A JP2010235970 A JP 2010235970A JP 2010235970 A JP2010235970 A JP 2010235970A JP 5576759 B2 JP5576759 B2 JP 5576759B2
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inward
ink outflow
diameter
ballpoint pen
outflow gap
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JP2011245841A (en
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誠 大屋
橋本　　猛
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Pilot Ink Co Ltd
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Pilot Ink Co Ltd
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本発明は、ボールペンに関する。 The present invention relates to a ballpoint pen.

従来、特許文献１には、金属製のチップ本体の先端に内向きの先端縁部を設け、前記先端縁部の後方のチップ本体内面に複数の内方突出部を内方への押圧変形により設け、前記先端縁部と前記内方突出部との間にボールを回転可能に抱持し、前記内方突出部の相互間に、中心部から径方向外方に放射状に延びるインキ流出間隙を形成し、前記インキ流出間隙に、ボールを前方へ付勢し且つボールを先端縁部の内面に密接させるロッド部を挿通させてなるボールペンであって、前記インキ流出間隙の中心部の仮想内接円の直径を、前記ロッド部の外径より大きく設定するとともに、前記インキ流出間隙の最小寸法を、前記ロッド部の外径より小さく設定したことを特徴とするボールペンが記載されている。 Conventionally, in Patent Document 1, an inward tip edge is provided at the tip of a metal chip body, and a plurality of inward protrusions are formed on the inner surface of the chip body behind the tip edge by inward deformation. An ink outflow gap extending radially outward from a central portion between the inner projecting portions and rotatably holding a ball between the tip edge portion and the inner projecting portion. A ballpoint pen formed by inserting a rod portion for biasing the ball forward and intimately contacting the ball with the inner surface of the tip edge portion in the ink outflow gap. A ballpoint pen is described in which the diameter of a circle is set larger than the outer diameter of the rod portion, and the minimum dimension of the ink outflow gap is set smaller than the outer diameter of the rod portion.

特開２００３−１３６８７７号公報JP 2003-136877 A

前記特許文献１のボールペンは、ロッド部がインキ流出間隙の周縁端部の近傍に入り込むことを防止できるとしても、ボール受け座のインキ流出間隙が小さくなり、インキ流出性が低下するおそれがある。特に、前記特許文献１のボールペンは、比較的粒子径の大きい顔料を含有するインキを採用した場合、十分なインキ流出性が得られないおそれがある。 In the ballpoint pen of Patent Document 1, even though the rod portion can prevent the vicinity of the peripheral edge portion of the ink outflow gap, the ink outflow gap of the ball receiving seat becomes small and the ink outflow property may be reduced. In particular, the ballpoint pen disclosed in Patent Document 1 may not have sufficient ink outflow properties when an ink containing a pigment having a relatively large particle size is employed.

本発明は前記従来の問題点を解決するものであって、十分なインキ流出性が得られるとともに、ロッド部を確実にインキ流出間隙の中心部にガイドすることができるボールペンを提供しようとするものである。 The present invention solves the above-mentioned conventional problems, and provides a ballpoint pen that can provide sufficient ink outflow and can reliably guide the rod portion to the center of the ink outflow gap. It is.

＜１＞本願の第１の発明は、金属製のチップ本体２の前端に内向きの前端縁部４を設け、前記前端縁部４の後方のチップ本体２内面にボール受け座用の複数の内方突出部を内方への押圧変形により設け、前記前端縁部４と前記内方突出部との間で回転可能にボール３を抱持し、前記内方突出部の相互間に、中心部から径方向外方に放射状に延びるインキ流出間隙５１を形成し、前記インキ流出間隙５１に、ボール３を前方に付勢し且つボール３を前端縁部４の内面に密接させるロッド部７１を遊挿させてなるボールペンであって、前記ボール受け座用の複数の内方突出部を第１の内方突出部５とし、前記第１の内方突出部５より後方のチップ本体２内面に複数の第２の内方突出部６を設け、前記第２の内方突出部６の相互間に中心部から径方向外方に放射状に延びるインキ流出間隙６１を形成し、前記第２の内方突出部６の相互間のインキ流出間隙６１に前記ロッド部７１を遊挿させてなることを要件とする。 <1> In the first invention of the present application, an inward front end edge portion 4 is provided at the front end of the metal chip main body 2, and a plurality of ball receiving seats are provided on the inner surface of the chip main body 2 behind the front end edge portion 4. An inward projecting portion is provided by inward pressing deformation, and the ball 3 is held between the front end edge portion 4 and the inward projecting portion so as to be rotatable. An ink outflow gap 51 extending radially outward from the portion is formed, and a rod portion 71 is provided in the ink outflow gap 51 to urge the ball 3 forward and to bring the ball 3 into close contact with the inner surface of the front edge 4. A ball-point pen that is loosely inserted, wherein a plurality of inwardly projecting portions for the ball seat are defined as first inwardly projecting portions 5 on the inner surface of the chip body 2 behind the first inwardly projecting portion 5. A plurality of second inward projecting portions 6 are provided, and the second inward projecting portions 6 are provided between the second inward projecting portions 6 and radially Forming an ink outflow gap 61 extending radially outwardly, and the second requirement the by comprising a rod portion 71 is loosely inserted into the ink outflow gap 61 between the mutually inwardly projecting portion 6.

前記第１の発明のボールペン１は、前記第１の内方突出部５より後方のチップ本体２内面に複数の第２の内方突出部６を設け、前記第２の内方突出部６の相互間に中心部から径方向外方に放射状に延びるインキ流出間隙６１を形成し、前記第２の内方突出部６の相互間のインキ流出間隙６１に前記ロッド部７１を遊挿させてなることにより、従来のようなロッド部がインキ流出間隙の周縁端部の近傍に入り込むことを防止するためにボール受け座のインキ流出間隙を小さくする必要がなくなり、前記第１の内方突出部５の相互間のインキ流出間隙５１、及び前記第２の内方突出部６の相互間のインキ流出間隙６１を十分に大きく設定でき、チップ本体２の前端からの十分なインキ流出性が得られるとともに、ロッド部７１を確実にインキ流出間隙５１の中心部（即ちボール受け座の中心部）にガイドすることができる。 The ballpoint pen 1 of the first invention is provided with a plurality of second inward protrusions 6 on the inner surface of the chip body 2 behind the first inward protrusion 5, An ink outflow gap 61 extending radially outward from the central portion is formed between each other, and the rod portion 71 is loosely inserted into the ink outflow gap 61 between the second inward projecting portions 6. Thus, it is not necessary to reduce the ink outflow gap of the ball receiving seat in order to prevent the rod portion from entering the vicinity of the peripheral edge portion of the ink outflow gap as in the prior art, and the first inward protruding portion 5 is eliminated. And the ink outflow gap 61 between the second inward projecting portions 6 can be set sufficiently large, and sufficient ink outflow from the front end of the chip body 2 can be obtained. , Ensure that the rod part 71 flows out of the ink. It can be guided to the center of the gap 51 (i.e. the central portion of the ball seat).

＜２＞本願の第２の発明のボールペン１は、前記第１の発明のボールペン１において、前記第１の内方突出部５の頂点に接する仮想内接円の直径Ｙが、前記ロッド部７１の直径Ｘより大きく設定され、且つ、前記第２の内方突出部６の頂点に接する仮想内接円の直径Ｚが、前記ロッド部７１の直径Ｘより大きく設定されることを要件とする。 <2> In the ballpoint pen 1 of the second invention of the present application, in the ballpoint pen 1 of the first invention, the diameter Y of a virtual inscribed circle in contact with the apex of the first inward protruding portion 5 is the rod portion 71. The diameter Z of the virtual inscribed circle that is set to be larger than the diameter X of the second inward projecting portion 6 and is in contact with the apex of the second inward protruding portion 6 is set to be larger than the diameter X of the rod portion 71.

前記第２の発明のボールペン１は、前記第１の内方突出部５の頂点に接する仮想内接円の直径Ｙが、前記ロッド部７１の直径Ｘより大きく設定され、且つ、前記第２の内方突出部６の頂点に接する仮想内接円の直径Ｚが、前記ロッド部７１の直径Ｘより大きく設定されることにより、ロッド部７１を、第１の内方突出部５のインキ流出間隙５１の中心部と、第２の内方突出部６のインキ流出間隙６１の中心部とに確実に遊挿配置することができる。前記ロッド部７１の横断面形状は、円形状、楕円形状、多角形状等のいずれであってもよい。前記ロッド部７１の直径Ｘとは、ロッド部７１の外径の最大値をいう。前記ロッド部７１とは、それ自体が撓んだり圧縮変形したりしてもよいし、その後端にコイル部またはゴム等の弾性部材を配設してもよい。 In the ballpoint pen 1 of the second invention, the diameter Y of a virtual inscribed circle in contact with the apex of the first inward protruding portion 5 is set larger than the diameter X of the rod portion 71, and the second pen By setting the diameter Z of the virtual inscribed circle in contact with the apex of the inward projecting portion 6 to be larger than the diameter X of the rod portion 71, the rod portion 71 is made to pass through the ink outflow gap of the first inward projecting portion 5. It is possible to securely insert and arrange the central portion of 51 and the central portion of the ink outflow gap 61 of the second inward projecting portion 6. The cross-sectional shape of the rod portion 71 may be any of a circular shape, an elliptical shape, a polygonal shape, and the like. The diameter X of the rod portion 71 refers to the maximum outer diameter of the rod portion 71. The rod portion 71 itself may bend or compressively deform, or an elastic member such as a coil portion or rubber may be disposed at the rear end thereof.

＜３＞本願の第３の発明のボールペン１は、前記第１または第２の発明のボールペン１において、前記第１の内方突出部５の相互間の後方に前記第２の内方突出部６が位置してなることを要件とする。 <3> The ballpoint pen 1 according to a third aspect of the present invention is the ballpoint pen 1 according to the first or second aspect, wherein the second inward protrusion is disposed behind the first inward protrusion 5. It is a requirement that 6 is located.

前記第３の発明のボールペン１は、前記第１の内方突出部５の相互間の後方に前記第２の内方突出部６が位置してなることにより、より一層、前記第１の内方突出部５の相互間のインキ流出間隙５１、及び前記第２の内方突出部６の相互間のインキ流出間隙６１を十分に大きく設定でき、チップ本体２の前端からの十分なインキ流出性が得られるとともに、ロッド部７１を確実にインキ流出間隙５１の中心部にガイドすることができる。 In the ballpoint pen 1 of the third invention, the second inner projecting portion 6 is located behind the first inward projecting portions 5, so that the first inner projecting portion 6 is further enhanced. The ink outflow gap 51 between the side protrusions 5 and the ink outflow gap 61 between the second inward protrusions 6 can be set sufficiently large, and sufficient ink outflow from the front end of the chip body 2 can be achieved. And the rod portion 71 can be reliably guided to the central portion of the ink outflow gap 51.

＜４＞本願の第４の発明のボールペン１は、前記第１乃至第３の発明のボールペン１において、前記第１の内方突出部５と前記第２の内方突出部６とを近接して設けたことを要件とする。 <4> The ballpoint pen 1 according to the fourth aspect of the present invention is the ballpoint pen 1 according to the first to third aspects of the present invention, wherein the first inward protruding portion 5 and the second inward protruding portion 6 are brought close to each other. It is necessary to have established.

前記第４の発明のボールペン１は、第１の内方突出部５と第２の内方突出部６とを近接して設けたことにより、ロッド部７１を、より一層確実にインキ流出間隙５１の中心部にガイドすることができる。 In the ballpoint pen 1 according to the fourth aspect of the invention, the first inward projecting portion 5 and the second inward projecting portion 6 are provided close to each other, so that the rod portion 71 is more reliably provided with the ink outflow gap 51. Can be guided to the center of the.

＜５＞本願の第５の発明のボールペン１は、前記第１乃至第４の発明のボールペン１において、前記第１の内方突出部５の後端より後方に前記第２の内方突出部６の前端が位置することを要件とする。 <5> ballpoint pen 1 in the fifth invention of the present application, the in ballpoint pen 1 of the first to fourth invention, the first inner and the second inward protrusion rearward from the rear end of the projecting portion 5 It is a requirement that the front end of 6 is located.

前記第５の発明のボールペン１は、第１の内方突出部５の後端より後方に第２の内方突出部６の前端が位置することにより、第１の内方突出部５と第２の内方突出部６とが互いに影響し合うことがない。その結果、第１の内方突出部５及び第２の内方突出部６の各々の適正な形状を得る。もし、第１の内方突出部５の後端よりも前方に第２の突出部６の前端が位置する場合、第１の内方突出部５と第２の内方突出部６とが互いに影響し合い、第１の内方突出部５及び第２の内方突出部６の各々の適正な形状が得られないおそれがある。また、前記第５の発明のボールペン１は、第４の発明のように第１の内方突出部５と第２の内方突出部６とを近接して設けた場合でも、第２の突出部６のインキ流出間隙６１から第１の内方突出部５のインキ流出間隙５１へのインキ流通性が低下するおそれがない。 In the ballpoint pen 1 of the fifth invention, the front end of the second inward projecting portion 6 is positioned behind the rear end of the first inward projecting portion 5 so that the first inward projecting portion 5 and the The two inward projecting portions 6 do not affect each other. As a result, the appropriate shape of each of the first inward projecting portion 5 and the second inward projecting portion 6 is obtained. If the front end of the second projecting portion 6 is positioned ahead of the rear end of the first inward projecting portion 5, the first inward projecting portion 5 and the second inward projecting portion 6 are mutually connected. There is a possibility that the proper shapes of the first inward projecting portion 5 and the second inward projecting portion 6 cannot be obtained. Further, the ballpoint pen 1 of the fifth invention has the second protrusion even when the first inward protrusion 5 and the second inward protrusion 6 are provided close to each other as in the fourth invention. There is no possibility that the ink flowability from the ink outflow gap 61 of the portion 6 to the ink outflow gap 51 of the first inward projecting portion 5 is lowered.

＜６＞本願の第６の発明のボールペン１は、前記第１乃至第５の発明のボールペン１において、前記第２の内方突出部６の頂点に接する仮想内接円の直径が、前記第１の内方突出部５の頂点に接する仮想内接円の直径より小さく設定されることを要件とする。 <6> The ballpoint pen 1 of the sixth invention of the present application is the ballpoint pen 1 of the first to fifth inventions, wherein a diameter of a virtual inscribed circle that contacts the vertex of the second inward protruding portion 6 is It is required that the diameter is set to be smaller than the diameter of a virtual inscribed circle that is in contact with the apex of one inward projecting portion 5.

前記第６の発明のボールペン１は、第２の内方突出部６の頂点に接する仮想内接円の直径が、第１の内方突出部５の頂点に接する仮想内接円の直径より小さく設定されることにより、ロッド部７１を第２の内方突出部６によって、より一層確実に、第１の内方突出部５の相互間のインキ流出間隙５１の中心部にガイドすることができる。 In the ballpoint pen 1 of the sixth aspect of the invention, the diameter of the virtual inscribed circle in contact with the apex of the second inward protruding portion 6 is smaller than the diameter of the virtual inscribed circle in contact with the apex of the first inward protruding portion 5. By setting, the rod portion 71 can be more reliably guided to the center portion of the ink outflow gap 51 between the first inward protruding portions 5 by the second inward protruding portion 6. .

本発明のボールペンは、十分なインキ流出性が得られるとともに、ロッド部を確実にインキ流出間隙の中心部にガイドすることができる。 The ballpoint pen of the present invention can obtain sufficient ink outflow properties and can reliably guide the rod portion to the center portion of the ink outflow gap.

本発明の第１の実施の形態のボールペンの要部拡大縦断面図である。It is a principal part expansion longitudinal cross-sectional view of the ball-point pen of the 1st Embodiment of this invention. 図１のＡ−Ａ線断面図である。It is the sectional view on the AA line of FIG. 図１のＢ−Ｂ線断面図である。It is the BB sectional view taken on the line of FIG. 図１のＣ−Ｃ線矢視断面図である。It is CC sectional view taken on the line of FIG. 本発明の第１・第２の実施の形態のボールペンの縦断面図である。It is a longitudinal cross-sectional view of the ball-point pen of the 1st, 2nd embodiment of this invention. 図５の要部拡大断面図である。It is a principal part expanded sectional view of FIG. 本発明の第２の実施の形態のボールペンの要部拡大縦断面図である。It is a principal part expansion longitudinal cross-sectional view of the ball-point pen of the 2nd Embodiment of this invention. 図７のＤ−Ｄ線断面図である。It is the DD sectional view taken on the line of FIG. 図７のＥ−Ｅ線断面図である。It is the EE sectional view taken on the line of FIG. 図７のＦ−Ｆ線矢視断面図である。FIG. 8 is a cross-sectional view taken along line F-F in FIG. 7. 本発明の第３の実施の形態のボールペンの要部拡大縦断面図である。It is a principal part expansion longitudinal cross-sectional view of the ball-point pen of the 3rd Embodiment of this invention. 図１１のＧ−Ｇ線断面図である。It is the GG sectional view taken on the line of FIG. 図１１のＨ−Ｈ線断面図である。It is the HH sectional view taken on the line of FIG. 図１１のＩ−Ｉ線矢視断面図である。It is the II sectional view taken on the line of FIG. 本発明の第３の実施の形態のボールペンの縦断面図である。It is a longitudinal cross-sectional view of the ball-point pen of the 3rd Embodiment of this invention. 図１５の要部拡大断面図である。It is a principal part expanded sectional view of FIG.

＜第１の実施の形態＞
図１乃至図６に本発明の第１の実施の形態を示す。
本実施の形態のボールペン１は、チップ本体２と、該チップ本体２の後端部を保持するホルダー８と、該ホルダー８の後端部が圧入固着されるインキ収容管９と、該チップ本体２内及びホルダー８内に収容されるスプリング７と、インキ収容管９の後端開口部に取り付けられる尾栓１０とからなる。前記インキ収容管９内には、インキ９１と、該インキ９１の消費に伴い前進する追従体９２（例えば高粘度流体と固形物）とが収容される。 <First Embodiment>
1 to 6 show a first embodiment of the present invention.
The ballpoint pen 1 according to the present embodiment includes a chip body 2, a holder 8 that holds the rear end portion of the chip body 2, an ink containing tube 9 into which the rear end portion of the holder 8 is press-fitted and fixed, and the chip body. 2 and the spring 7 accommodated in the holder 8 and a tail plug 10 attached to the rear end opening of the ink accommodating tube 9. In the ink storage tube 9, ink 91 and a follower 92 (for example, a high-viscosity fluid and solid matter) that move forward as the ink 91 is consumed are stored.

前記スプリング７は、前部のロッド部７１と、後部のコイル部７２とが一体に連設されてなる。前記スプリング７は、ステンレス鋼製線材により形成される。 The spring 7 includes a front rod portion 71 and a rear coil portion 72 that are integrally connected. The spring 7 is formed of a stainless steel wire.

前記チップ本体２は、前端にボール３を回転可能に抱持した金属製（例えばステンレス鋼製）の筒体からなる。前記チップ本体２の前端部には、カシメ変形により内向きの前端縁部４と、内方への押圧変形により形成した複数の第１の内方突出部５よりなるボール受け座とが形成される。前記前端縁部４とボール受け座とによって、ボール３が回転可能且つ前後に移動可能に抱持される。 The chip body 2 is made of a metal (for example, stainless steel) cylinder having a ball 3 rotatably held at its front end. The front end portion of the chip body 2 is formed with a front end edge portion 4 facing inward by caulking deformation and a ball receiving seat made up of a plurality of first inward protruding portions 5 formed by inward pressing deformation. The The ball 3 is held by the front edge 4 and the ball receiving seat so as to be rotatable and movable back and forth.

前記第１の内方突出部５より後方のチップ本体２内面には、複数の第２の内方突出部６が内方への押圧変形により形成される。前記第１の内方突出部５の個数（例えば３個）と第２の内方突出部６の設ける個数（例えば３個）は同数である。 A plurality of second inward protrusions 6 are formed on the inner surface of the chip body 2 behind the first inward protrusion 5 by inward pressing deformation. The number (for example, three) of the first inward protrusions 5 and the number (for example, three) of the second inward protrusions 6 are the same.

前記スプリング７のロッド部７１が、チップ本体２の後端開口部より前方に挿入され、最初に、第２の内方突出部６の相互間のインキ流出間隙６１に挿通され、次に、第１の内方突出部５の相互間のインキ流出間隙５１に挿通される。 The rod portion 71 of the spring 7 is inserted in front of the rear end opening of the chip body 2, and is first inserted into the ink outflow gap 61 between the second inward projecting portions 6, and then the second One inward protrusion 5 is inserted into the ink outflow gap 51 between each other.

第１の内方突出部５の相互間の軸方向後方の延長線上のチップ本体２内面には、第２の内方突出部６が位置し、第２の内方突出部６の相互間の軸方向前方の延長線上のチップ本体２内面には、第１の内方突出部５が位置する。即ち、前記チップ本体２から仮想的にボール３を除いた状態でチップ本体２の前端開口部から第１の内方突出部５を視認したとき、第１の内方突出部５の相互間に第２の内方突出部６が位置する（図４参照）。それにより、前記第１の内方突出部５の相互間のインキ流出間隙５１、及び前記第２の内方突出部６の相互間のインキ流出間隙６１を十分に大きく設定でき、チップ本体２の前端からの十分なインキ流出性が得られるとともに、ロッド部７１を確実にインキ流出間隙５１の中心部にガイドすることができ、また、筆記時、ロッド部７１がインキ流出間隙５１の中心部に維持され、安定したボール３の回転が得られる。 On the inner surface of the chip body 2 on the axially rearward extension line between the first inward projecting portions 5, a second inward projecting portion 6 is located, and between the second inward projecting portions 6. A first inward projecting portion 5 is located on the inner surface of the chip body 2 on the extension line in the axially forward direction. That is, when the first inward projecting portion 5 is visually recognized from the front end opening of the chip body 2 with the ball 3 virtually removed from the chip body 2, the first inward projecting portion 5 is interposed between the first inward projecting portions 5. The 2nd inward protrusion part 6 is located (refer FIG. 4). Thereby, the ink outflow gap 51 between the first inward protrusions 5 and the ink outflow gap 61 between the second inward protrusions 6 can be set sufficiently large. Sufficient ink outflow from the front end can be obtained, and the rod portion 71 can be reliably guided to the center portion of the ink outflow gap 51. Further, the rod portion 71 can be placed at the center portion of the ink outflow gap 51 during writing. A stable and stable rotation of the ball 3 is obtained.

前記第１の内方突出部５の頂点に接する仮想内接円の直径Ｙが、前記ロッド部７１の直径Ｘより大きく設定される。さらに、前記第２の内方突出部６の頂点に接する仮想内接円の直径Ｚが、前記ロッド部７１の直径Ｘより大きく設定される。それにより、ロッド部７１を、第１の内方突出部５のインキ流出間隙５１の中心部と、第２の内方突出部６のインキ流出間隙６１の中心部とに確実に遊挿配置することができる。 A diameter Y of a virtual inscribed circle that contacts the apex of the first inward protruding portion 5 is set to be larger than the diameter X of the rod portion 71. Furthermore, a diameter Z of a virtual inscribed circle that contacts the vertex of the second inward projecting portion 6 is set to be larger than the diameter X of the rod portion 71. As a result, the rod portion 71 is reliably loosely inserted into the central portion of the ink outflow gap 51 of the first inward protruding portion 5 and the central portion of the ink outflow gap 61 of the second inward protruding portion 6. be able to.

第１の内方突出部５と第２の内方突出部６とが近接して設けられる。それにより、ロッド部７１を、より一層確実にインキ流出間隙５１の中心部にガイドすることができる。 The first inward projecting portion 5 and the second inward projecting portion 6 are provided close to each other. Thereby, the rod portion 71 can be guided to the central portion of the ink outflow gap 51 more reliably.

また、第１の内方突出部５の後端より後方に第２の突出部６の前端が位置する。それにより、第１の内方突出部５と第２の内方突出部６とが互いに影響し合うことがない。その結果、第１の内方突出部５及び第２の内方突出部６の各々の適正な形状を得る。さらに、第１の内方突出部５の後端より後方に第２の突出部６の前端が位置することにより、第１の内方突出部５と第２の内方突出部６とを近接して設けた場合でも、第２の突出部６のインキ流出間隙６１から第１の内方突出部５のインキ流出間隙５１へのインキ流通性が低下するおそれがない。 Further, the front end of the second protrusion 6 is located behind the rear end of the first inward protrusion 5. Thereby, the 1st inward protrusion part 5 and the 2nd inward protrusion part 6 do not mutually influence. As a result, the appropriate shape of each of the first inward projecting portion 5 and the second inward projecting portion 6 is obtained. Further, since the front end of the second protrusion 6 is positioned behind the rear end of the first inward protrusion 5, the first inward protrusion 5 and the second inward protrusion 6 are brought close to each other. Even if it is provided, there is no possibility that the ink flowability from the ink outflow gap 61 of the second protrusion 6 to the ink outflow gap 51 of the first inward protrusion 5 is lowered.

＜第２の実施の形態＞
図７乃至図１０、図５、図６に本発明の第２の実施の形態を示す。（図５及び図６は第１の実施の形態と共通） <Second Embodiment>
7 to 10, 5 and 6 show the second embodiment of the present invention. (FIGS. 5 and 6 are common to the first embodiment)

本実施の形態のボールペン１は、チップ本体２と、該チップ本体２の後端部を保持するホルダー８と、該ホルダー８の後端部が圧入固着されるインキ収容管９と、該チップ本体２内及びホルダー８内に収容されるスプリング７と、インキ収容管９の後端開口部に取り付けられる尾栓１０とからなる。前記インキ収容管９内には、インキ９１と、該インキ９１の消費に伴い前進する追従体９２（例えば高粘度流体と固形物）とが収容される。 The ballpoint pen 1 according to the present embodiment includes a chip body 2, a holder 8 that holds the rear end portion of the chip body 2, an ink containing tube 9 into which the rear end portion of the holder 8 is press-fitted and fixed, and the chip body. 2 and the spring 7 accommodated in the holder 8 and a tail plug 10 attached to the rear end opening of the ink accommodating tube 9. In the ink storage tube 9, ink 91 and a follower 92 (for example, a high-viscosity fluid and solid matter) that move forward as the ink 91 is consumed are stored.

前記スプリング７は、前部のロッド部７１と、後部のコイル部７２とが一体に連設されてなる。前記スプリング７は、ステンレス鋼製線材により形成される。 The spring 7 includes a front rod portion 71 and a rear coil portion 72 that are integrally connected. The spring 7 is formed of a stainless steel wire.

前記チップ本体２は、前端にボール３を回転可能に抱持した金属製（例えばステンレス鋼製）の筒体からなる。前記チップ本体２の前端部には、カシメ変形により内向きの前端縁部４と、内方への押圧変形により形成した複数の第１の内方突出部５よりなるボール受け座とが形成される。前記前端縁部４とボール受け座とによって、ボール３が回転可能且つ前後に移動可能に抱持される。 The chip body 2 is made of a metal (for example, stainless steel) cylinder having a ball 3 rotatably held at its front end. The front end portion of the chip body 2 is formed with a front end edge portion 4 facing inward by caulking deformation and a ball receiving seat made up of a plurality of first inward protruding portions 5 formed by inward pressing deformation. The The ball 3 is held by the front edge 4 and the ball receiving seat so as to be rotatable and movable back and forth.

前記第１の内方突出部５より後方のチップ本体２内面には、複数の第２の内方突出部６が内方への押圧変形により形成される。前記第１の内方突出部５の個数（例えば３個）と第２の内方突出部６の設ける個数（例えば３個）は同数である。 A plurality of second inward protrusions 6 are formed on the inner surface of the chip body 2 behind the first inward protrusion 5 by inward pressing deformation. The number (for example, three) of the first inward protrusions 5 and the number (for example, three) of the second inward protrusions 6 are the same.

前記スプリング７のロッド部７１が、チップ本体２の後端開口部より前方に挿入され、最初に、第２の内方突出部６の相互間のインキ流出間隙６１に挿通され、次に、第１の内方突出部５の相互間のインキ流出間隙５１に挿通される。 The rod portion 71 of the spring 7 is inserted in front of the rear end opening of the chip body 2, and is first inserted into the ink outflow gap 61 between the second inward projecting portions 6, and then the second One inward protrusion 5 is inserted into the ink outflow gap 51 between each other.

第１の内方突出部５の相互間の軸方向後方の延長線上のチップ本体２内面には、第２の内方突出部６が位置し、第２の内方突出部６の相互間の軸方向前方の延長線上のチップ本体２内面には、第１の内方突出部５が位置する。即ち、前記チップ本体２から仮想的にボール３を除いた状態でチップ本体２の前端開口部から第１の内方突出部５を視認したとき、第１の内方突出部５の相互間に第２の内方突出部６が位置する（図１０参照）。それにより、前記第１の内方突出部５の相互間のインキ流出間隙５１、及び前記第２の内方突出部６の相互間のインキ流出間隙６１を十分に大きく設定でき、チップ本体２の前端からの十分なインキ流出性が得られるとともに、ロッド部７１を確実にインキ流出間隙５１の中心部にガイドすることができ、また、筆記時、ロッド部７１がインキ流出間隙５１の中心部に維持され、安定したボール３の回転が得られる。 On the inner surface of the chip body 2 on the axially rearward extension line between the first inward projecting portions 5, a second inward projecting portion 6 is located, and between the second inward projecting portions 6. A first inward projecting portion 5 is located on the inner surface of the chip body 2 on the extension line in the axially forward direction. That is, when the first inward projecting portion 5 is visually recognized from the front end opening of the chip body 2 with the ball 3 virtually removed from the chip body 2, the first inward projecting portion 5 is interposed between the first inward projecting portions 5. The 2nd inward protrusion part 6 is located (refer FIG. 10). Thereby, the ink outflow gap 51 between the first inward protrusions 5 and the ink outflow gap 61 between the second inward protrusions 6 can be set sufficiently large. Sufficient ink outflow from the front end can be obtained, and the rod portion 71 can be reliably guided to the center portion of the ink outflow gap 51. Further, the rod portion 71 can be placed at the center portion of the ink outflow gap 51 during writing. A stable and stable rotation of the ball 3 is obtained.

前記第１の内方突出部５の頂点に接する仮想内接円の直径Ｙが、前記ロッド部７１の直径Ｘより大きく設定される（即ち、Ｘ＜Ｙの関係を示す）。さらに、前記第２の内方突出部６の頂点に接する仮想内接円の直径Ｚが、前記ロッド部７１の直径Ｘより大きく設定される（即ち、Ｘ＜Ｚの関係を示す）。それにより、ロッド部７１を、第１の内方突出部５のインキ流出間隙５１の中心部と、第２の内方突出部６のインキ流出間隙６１の中心部とに確実に遊挿配置することができる。 The diameter Y of the virtual inscribed circle that contacts the apex of the first inward protruding portion 5 is set to be larger than the diameter X of the rod portion 71 (that is, the relationship of X <Y is shown). Furthermore, the diameter Z of the virtual inscribed circle that contacts the vertex of the second inward projecting portion 6 is set to be larger than the diameter X of the rod portion 71 (that is, the relationship of X <Z is shown). As a result, the rod portion 71 is reliably loosely inserted into the central portion of the ink outflow gap 51 of the first inward protruding portion 5 and the central portion of the ink outflow gap 61 of the second inward protruding portion 6. be able to.

第１の内方突出部５と第２の内方突出部６とが近接して設けられる。それにより、ロッド部７１を、より一層確実にインキ流出間隙５１の中心部にガイドすることができる。 The first inward projecting portion 5 and the second inward projecting portion 6 are provided close to each other. Thereby, the rod portion 71 can be guided to the central portion of the ink outflow gap 51 more reliably.

また、第１の内方突出部５の後端より後方に第２の突出部６の前端が位置する。それにより、第１の内方突出部５と第２の内方突出部６とが互いに影響し合うことがない。その結果、第１の内方突出部５及び第２の内方突出部６の各々の適正な形状を得る。さらに、第１の内方突出部５の後端より後方に第２の突出部６の前端が位置することにより、第１の内方突出部５と第２の内方突出部６とを近接して設けた場合でも、第２の突出部６のインキ流出間隙６１から第１の内方突出部５のインキ流出間隙５１へのインキ流通性が低下するおそれがない。 Further, the front end of the second protrusion 6 is located behind the rear end of the first inward protrusion 5. Thereby, the 1st inward protrusion part 5 and the 2nd inward protrusion part 6 do not mutually influence. As a result, the appropriate shape of each of the first inward projecting portion 5 and the second inward projecting portion 6 is obtained. Further, since the front end of the second protrusion 6 is positioned behind the rear end of the first inward protrusion 5, the first inward protrusion 5 and the second inward protrusion 6 are brought close to each other. Even if it is provided, there is no possibility that the ink flowability from the ink outflow gap 61 of the second protrusion 6 to the ink outflow gap 51 of the first inward protrusion 5 is lowered.

前記第２の内方突出部６の頂点に接する仮想内接円の直径Ｚが、前記第１の内方突出部５の頂点に接する仮想内接円の直径Ｙより小さく設定される（即ち、Ｙ＞Ｚの関係を示す）。それにより、ロッド部７１を第２の内方突出部６によって、より一層確実に、第１の内方突出部５の相互間のインキ流出間隙５１の中心部にガイドすることができる。 The diameter Z of the virtual inscribed circle that contacts the vertex of the second inward protruding portion 6 is set smaller than the diameter Y of the virtual inscribed circle that contacts the vertex of the first inward protruding portion 5 (that is, Y> Z is shown). Accordingly, the rod portion 71 can be guided to the central portion of the ink outflow gap 51 between the first inward protruding portions 5 by the second inward protruding portion 6 more reliably.

＜第３の実施の形態＞
図１１乃至図１６に本発明の第３の実施の形態を示す。 <Third Embodiment>
11 to 16 show a third embodiment of the present invention.

本実施の形態のボールペン１は、チップ本体２と、該チップ本体２の後端部を保持するホルダー８と、該ホルダー８の後端部が圧入固着されるインキ収容管９と、該チップ本体２内及びホルダー８内に収容されるスプリング７と、インキ収容管９の後端開口部に取り付けられる尾栓１０とからなる。前記インキ収容管９内には、インキ９１と、該インキ９１の消費に伴い前進する追従体９２（例えば高粘度流体と固形物）とが収容される。 The ballpoint pen 1 according to the present embodiment includes a chip body 2, a holder 8 that holds the rear end portion of the chip body 2, an ink containing tube 9 into which the rear end portion of the holder 8 is press-fitted and fixed, and the chip body. 2 and the spring 7 accommodated in the holder 8 and a tail plug 10 attached to the rear end opening of the ink accommodating tube 9. In the ink storage tube 9, ink 91 and a follower 92 (for example, a high-viscosity fluid and solid matter) that move forward as the ink 91 is consumed are stored.

前記スプリング７は、前部のロッド部７１と、後部のコイル部７２とが一体に連設されてなる。前記スプリング７は、ステンレス鋼製線材により形成される。 The spring 7 includes a front rod portion 71 and a rear coil portion 72 that are integrally connected. The spring 7 is formed of a stainless steel wire.

前記チップ本体２は、前端にボール３を回転可能に抱持した金属製（例えばステンレス鋼製）の筒体からなる。前記チップ本体２の前端部には、カシメ変形により内向きの前端縁部４と、内方への押圧変形により形成した複数の第１の内方突出部５よりなるボール受け座とが形成される。前記前端縁部４とボール受け座とによって、ボール３が回転可能且つ前後に移動可能に抱持される。 The chip body 2 is made of a metal (for example, stainless steel) cylinder having a ball 3 rotatably held at its front end. The front end portion of the chip body 2 is formed with a front end edge portion 4 facing inward by caulking deformation and a ball receiving seat made up of a plurality of first inward protruding portions 5 formed by inward pressing deformation. The The ball 3 is held by the front edge 4 and the ball receiving seat so as to be rotatable and movable back and forth.

前記第１の内方突出部５より後方のチップ本体２内面には、複数の第２の内方突出部６が内方への押圧変形により形成される。前記第１の内方突出部５の個数（例えば４個）と第２の内方突出部６の設ける個数（例えば４個）は同数である。 A plurality of second inward protrusions 6 are formed on the inner surface of the chip body 2 behind the first inward protrusion 5 by inward pressing deformation. The number (for example, four) of the first inward protrusions 5 and the number (for example, four) of the second inward protrusions 6 are the same.

前記スプリング７のロッド部７１が、チップ本体２の後端開口部より前方に挿入され、最初に、第２の内方突出部６の相互間のインキ流出間隙６１に挿通され、次に、第１の内方突出部５の相互間のインキ流出間隙５１に挿通される。 The rod portion 71 of the spring 7 is inserted in front of the rear end opening of the chip body 2, and is first inserted into the ink outflow gap 61 between the second inward projecting portions 6, and then the second One inward protrusion 5 is inserted into the ink outflow gap 51 between each other.

第１の内方突出部５の相互間の軸方向後方の延長線上のチップ本体２内面には、第２の内方突出部６が位置し、第２の内方突出部６の相互間の軸方向前方の延長線上のチップ本体２内面には、第１の内方突出部５が位置する。即ち、前記チップ本体２から仮想的にボール３を除いた状態でチップ本体２の前端開口部から第１の内方突出部５を視認したとき、第１の内方突出部５の相互間に第２の内方突出部６が位置する（図１４参照）。それにより、前記第１の内方突出部５の相互間のインキ流出間隙５１、及び前記第２の内方突出部６の相互間のインキ流出間隙６１を十分に大きく設定でき、チップ本体２の前端からの十分なインキ流出性が得られるとともに、ロッド部７１を確実にインキ流出間隙５１の中心部にガイドすることができ、また、筆記時、ロッド部７１がインキ流出間隙５１の中心部に維持され、安定したボール３の回転が得られる。 On the inner surface of the chip body 2 on the axially rearward extension line between the first inward projecting portions 5, a second inward projecting portion 6 is located, and between the second inward projecting portions 6. A first inward projecting portion 5 is located on the inner surface of the chip body 2 on the extension line in the axially forward direction. That is, when the first inward projecting portion 5 is visually recognized from the front end opening of the chip body 2 with the ball 3 virtually removed from the chip body 2, the first inward projecting portion 5 is interposed between the first inward projecting portions 5. The 2nd inward protrusion part 6 is located (refer FIG. 14). Thereby, the ink outflow gap 51 between the first inward protrusions 5 and the ink outflow gap 61 between the second inward protrusions 6 can be set sufficiently large. Sufficient ink outflow from the front end can be obtained, and the rod portion 71 can be reliably guided to the center portion of the ink outflow gap 51. Further, the rod portion 71 can be placed at the center portion of the ink outflow gap 51 during writing. A stable and stable rotation of the ball 3 is obtained.

前記第１の内方突出部５の頂点に接する仮想内接円の直径Ｙが、前記ロッド部７１の直径Ｘより大きく設定される（即ち、Ｘ＜Ｙの関係を示す）。さらに、前記第２の内方突出部６の頂点に接する仮想内接円の直径Ｚが、前記ロッド部７１の直径Ｘより大きく設定される（即ち、Ｘ＜Ｚの関係を示す）。それにより、ロッド部７１を、第１の内方突出部５のインキ流出間隙５１の中心部と、第２の内方突出部６のインキ流出間隙６１の中心部とに確実に遊挿配置することができる。 The diameter Y of the virtual inscribed circle that contacts the apex of the first inward protruding portion 5 is set to be larger than the diameter X of the rod portion 71 (that is, the relationship of X <Y is shown). Furthermore, the diameter Z of the virtual inscribed circle that contacts the vertex of the second inward projecting portion 6 is set to be larger than the diameter X of the rod portion 71 (that is, the relationship of X <Z is shown). As a result, the rod portion 71 is reliably loosely inserted into the central portion of the ink outflow gap 51 of the first inward protruding portion 5 and the central portion of the ink outflow gap 61 of the second inward protruding portion 6. be able to.

第１の内方突出部５と第２の内方突出部６とが近接して設けられる。それにより、ロッド部７１を、より一層確実にインキ流出間隙５１の中心部にガイドすることができる。 The first inward projecting portion 5 and the second inward projecting portion 6 are provided close to each other. Thereby, the rod portion 71 can be guided to the central portion of the ink outflow gap 51 more reliably.

また、第１の内方突出部５の後端より後方に第２の突出部６の前端が位置する。それにより、第１の内方突出部５と第２の内方突出部６とが互いに影響し合うことがない。その結果、第１の内方突出部５及び第２の内方突出部６の各々の適正な形状を得る。さらに、第１の内方突出部５の後端より後方に第２の突出部６の前端が位置することにより、第１の内方突出部５と第２の内方突出部６とを近接して設けた場合でも、第２の突出部６のインキ流出間隙６１から第１の内方突出部５のインキ流出間隙５１へのインキ流通性が低下するおそれがない。 Further, the front end of the second protrusion 6 is located behind the rear end of the first inward protrusion 5. Thereby, the 1st inward protrusion part 5 and the 2nd inward protrusion part 6 do not mutually influence. As a result, the appropriate shape of each of the first inward projecting portion 5 and the second inward projecting portion 6 is obtained. Further, since the front end of the second protrusion 6 is positioned behind the rear end of the first inward protrusion 5, the first inward protrusion 5 and the second inward protrusion 6 are brought close to each other. Even if it is provided, there is no possibility that the ink flowability from the ink outflow gap 61 of the second protrusion 6 to the ink outflow gap 51 of the first inward protrusion 5 is lowered.

前記第２の内方突出部６の頂点に接する仮想内接円の直径Ｚが、前記第１の内方突出部５の頂点に接する仮想内接円の直径Ｙより小さく設定される（即ち、Ｙ＞Ｚの関係を示す）。それにより、ロッド部７１を第２の内方突出部６によって、より一層確実に、第１の内方突出部５の相互間のインキ流出間隙５１の中心部にガイドすることができる。 The diameter Z of the virtual inscribed circle that contacts the vertex of the second inward protruding portion 6 is set smaller than the diameter Y of the virtual inscribed circle that contacts the vertex of the first inward protruding portion 5 (that is, Y> Z is shown). Accordingly, the rod portion 71 can be guided to the central portion of the ink outflow gap 51 between the first inward protruding portions 5 by the second inward protruding portion 6 more reliably.

１ ボールペン
２ チップ本体
３ ボール
４ 前端縁部
５ 第１の内方突出部
５１ インキ流出間隙
６ 第２の内方突出部
６１ インキ流出間隙
７ スプリング
７１ ロッド部
７２ コイル部
８ ホルダー
９ インキ収容管
９１ インキ
９２ 追従体
１０ 尾栓
Ｘ ロッド部の直径
Ｙ 第１の内方突出部の頂点に接する仮想内接円の直径
Ｚ 第２の内方突出部の頂点に接する仮想内接円の直径 DESCRIPTION OF SYMBOLS 1 Ball-point pen 2 Tip body 3 Ball 4 Front edge 5 First inward protrusion 51 Ink outflow gap 6 Second inward protrusion 61 Ink outflow gap 7 Spring 71 Rod portion 72 Coil portion 8 Holder 9 Ink receiving tube 91 Ink 92 Follower 10 Tail plug X Diameter Y of rod portion Diameter Z of virtual inscribed circle in contact with the apex of first inward protruding portion Diameter of virtual inscribed circle in contact with the apex of second inward protruding portion

Claims (6)

金属製のチップ本体の前端に内向きの前端縁部を設け、前記前端縁部の後方のチップ本体内面にボール受け座用の複数の内方突出部を内方への押圧変形により設け、前記前端縁部と前記内方突出部との間で回転可能にボールを抱持し、前記内方突出部の相互間に、中心部から径方向外方に放射状に延びるインキ流出間隙を形成し、前記インキ流出間隙に、ボールを前方に付勢し且つボールを前端縁部の内面に密接させるロッド部を遊挿させてなるボールペンであって、
前記ボール受け座用の複数の内方突出部を第１の内方突出部とし、前記第１の内方突出部より後方のチップ本体内面に複数の第２の内方突出部を設け、前記第２の内方突出部の相互間に中心部から径方向外方に放射状に延びるインキ流出間隙を形成し、前記第２の内方突出部の相互間のインキ流出間隙に前記ロッド部を遊挿させてなることを特徴とするボールペン。 A front end edge portion facing inward is provided at the front end of the metal chip main body, and a plurality of inward protruding portions for ball receiving seats are provided on the inner surface of the chip main body behind the front end edge portion by inward pressing deformation, A ball is rotatably held between the front edge and the inward protruding portion, and an ink outflow gap extending radially outward from the center portion is formed between the inward protruding portions, A ballpoint pen in which a rod portion that urges the ball forward and closely contacts the inner surface of the front end edge portion is loosely inserted into the ink outflow gap,
The plurality of inward protrusions for the ball receiving seat are defined as first inward protrusions, and a plurality of second inward protrusions are provided on the inner surface of the chip body behind the first inward protrusion, An ink outflow gap extending radially outward from the central portion is formed between the second inward protrusions, and the rod portion is allowed to play in the ink outflow gap between the second inward protrusions. A ballpoint pen characterized by being inserted. 前記第１の内方突出部の頂点に接する仮想内接円の直径が、前記ロッド部の直径より大きく設定され、且つ、前記第２の内方突出部の頂点に接する仮想内接円の直径が、前記ロッド部の直径より大きく設定される請求項１記載のボールペン。 The diameter of a virtual inscribed circle that is set to be larger than the diameter of the rod portion and that is in contact with the vertex of the second inward protruding portion, and the diameter of the virtual inscribed circle that contacts the vertex of the first inward protruding portion is set Is set larger than the diameter of the rod portion. 前記第１の内方突出部の相互間の後方に前記第２の内方突出部が位置してなる請求項１または２記載のボールペン。 3. The ballpoint pen according to claim 1, wherein the second inward projecting portion is positioned behind the first inward projecting portion. 4. 前記第１の内方突出部と前記第２の内方突出部とを近接して設けた請求項１乃至３の何れかに記載のボールペン。 The ballpoint pen according to any one of claims 1 to 3, wherein the first inward projecting portion and the second inward projecting portion are provided close to each other. 前記第１の内方突出部の後端より後方に前記第２の内方突出部の前端が位置する請求項１乃至４の何れかに記載のボールペン。 The ballpoint pen according to any one of claims 1 to 4, wherein a front end of the second inward protruding portion is located behind a rear end of the first inward protruding portion. 前記第２の内方突出部の頂点に接する仮想内接円の直径が、前記第１の内方突出部の頂点に接する仮想内接円の直径より小さく設定される請求項１乃至５の何れかに記載のボールペン。 6. The diameter of a virtual inscribed circle in contact with the vertex of the second inward protruding portion is set smaller than the diameter of a virtual inscribed circle in contact with the vertex of the first inward protruding portion. The ballpoint pen described in Crab.
JP2010235970A 2010-04-30 2010-10-20 Ballpoint pen Expired - Fee Related JP5576759B2 (en)

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