JP2016112858A

JP2016112858A - Ball point pen

Info

Publication number: JP2016112858A
Application number: JP2014255620A
Authority: JP
Inventors: 大屋　誠; Makoto Oya; 誠大屋
Original assignee: Pilot Ink Co Ltd; Pilot Corp
Current assignee: Pilot Ink Co Ltd; Pilot Corp
Priority date: 2014-12-17
Filing date: 2014-12-17
Publication date: 2016-06-23

Abstract

PROBLEM TO BE SOLVED: To provide a ball point pen that can avoid a spring from moving forward accompanying forward movement of ink to sufficiently prevent a ball from falling off even when being applied with impact such as dropping.SOLUTION: A ball point pen tip 2 holds a ball 4 rotatably between an inward front edge part 31 and a ball receiving seat 32 formed behind the part. An ink storage tube 5 is configured to have the ball point pen tip 2 adhered to a front end part thereof and store ink 51 directly therein. A spring 6 is stored in an ink supply path behind the ball 4, energizes the ball 4 forward and pressure-contacts the ball 4 with an inner surface of the front edge part 31. A coil part 8 of the spring 6 comprises an annular 84 made of a tightly wound part protruding outward in a radial direction. In the ink supply path are provided a front lock wall part 3a to which is locked a front end of an annular flange part 84 and a rear lock wall part 9a to which is locked a rear end of the annular flange part 84. Between the front lock wall part 3a and the rear lock wall part 9a, the annular flange part 84 is held in a longitudinal direction.SELECTED DRAWING: Figure 1

Description

本発明は、ボールペンに関する。 The present invention relates to a ballpoint pen.

従来この種のボールペンにおいて、例えば、特許文献１には、チップを保持する先体の内面のスプリング保持部にスプリングの大径部の後端が当接する構成が開示されている。また、特許文献２には、チップの後端内壁によってスプリングの後端が係止される構成が開示されている。 Conventionally, in this type of ballpoint pen, for example, Patent Document 1 discloses a configuration in which a rear end of a large-diameter portion of a spring is in contact with a spring holding portion of an inner surface of a tip that holds a tip. Patent Document 2 discloses a configuration in which a rear end of a spring is locked by a rear end inner wall of a chip.

特開平８−１１４７８号公報JP-A-8-11478 特開平８−２４４３９５号公報JP-A-8-244395

前記特許文献１、２のボールペンは、何れも落下等で衝撃が加わった場合、インキの前方移動に伴ってスプリングが前方に移動し、該スプリングによってボールが強く前方押圧され、それにより、ボールが外部に脱落するおそれがある。 In any of the ballpoint pens of Patent Documents 1 and 2, when an impact is applied due to dropping or the like, the spring moves forward as the ink moves forward, and the ball is strongly pressed forward by the spring. There is a risk of falling outside.

本発明は前記従来の問題点解決するものであって、落下等の衝撃が加わった場合でも、インキの前方移動に伴うスプリングの前方移動を回避し、ボールの脱落を十分に防止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。
尚、本発明において、「前」とはペン先側を指し、「後」とはその反対側を指す。 The present invention solves the above-mentioned conventional problems, and even when an impact such as dropping is applied, the forward movement of the spring accompanying the forward movement of the ink can be avoided, and the drop of the ball can be sufficiently prevented. Try to provide a ballpoint pen.
In the present invention, “front” refers to the pen tip side, and “rear” refers to the opposite side.

本願の第１の発明は、内向きの前端縁部３１と、その後方に形成されたボール受け座３２との間で回転可能にボール４を抱持するボールペンチップ２と、該ボールペンチップ２が前端部に固着され且つ内部にインキ５１が直に収容されたインキ収容筒５と、前記ボール４後方のインキ供給路内に収容され、前記ボール４を前方に付勢し且つ前記ボール４を前記前端縁部３１の内面に圧接するスプリング６と、を備えたボールペンであって、前記スプリング６がコイル部８を備え、該コイル部８が、径方向外方に突出される密着巻部よりなる環状鍔部８４を備え、前記インキ供給路内に、前記環状鍔部８４の前端が係止される前側係止壁部３ａと、前記環状鍔部８４の後端が係止される後側係止壁部９ａとを設け、前記前側係止壁部３ａと前記後側係止壁部９ａとの間で前記環状鍔部８４が前後方向に挟持されてなることを要件とする。 1st invention of this application is the ball-point pen tip 2 holding the ball | bowl 4 rotatably between the inward front edge 31 and the ball | bowl receiving seat 32 formed in the back, An ink containing cylinder 5 fixed to the front end portion and containing ink 51 directly inside is housed in an ink supply path behind the ball 4 to urge the ball 4 forward and A ballpoint pen including a spring 6 that presses against the inner surface of the front edge 31, wherein the spring 6 includes a coil portion 8, and the coil portion 8 includes a tightly wound portion that protrudes radially outward. A front engaging wall portion 3a in which the front end of the annular flange 84 is locked in the ink supply path; and a rear engagement in which the rear end of the annular flange 84 is locked in the ink supply path. A stop wall portion 9a, and the front side locking wall portion 3a Wherein between the serial rear engaging wall portion 9a annular flange portion 84 and the requirements to become it is sandwiched in the longitudinal direction.

前記第１の発明のボールペンは、前記スプリング６がコイル部８を備え、該コイル部８が、径方向外方に突出される密着巻部よりなる環状鍔部８４を備え、前記インキ供給路内に、前記環状鍔部８４の前端が係止される前側係止壁部３ａと、前記環状鍔部８４の後端が係止される後側係止壁部９ａとを設け、前記前側係止壁部３ａと前記後側係止壁部９ａとの間で前記環状鍔部８４が前後方向に挟持されてなることにより、落下等に衝撃が加わった場合でも、インキの前方移動に伴うスプリングの前方移動を回避し、ボールの脱落を十分に防止することができる。 In the ballpoint pen of the first invention, the spring 6 includes a coil portion 8, and the coil portion 8 includes an annular collar portion 84 formed of a tightly wound portion protruding outward in the radial direction. Provided with a front locking wall portion 3a for locking the front end of the annular flange 84 and a rear locking wall portion 9a for locking the rear end of the annular flange 84. The annular flange 84 is sandwiched in the front-rear direction between the wall portion 3a and the rear locking wall portion 9a, so that even when an impact is applied to the fall or the like, It is possible to avoid the forward movement and sufficiently prevent the ball from falling off.

本願の第２の発明は、前記第１の発明のボールペンにおいて、前記前側係止壁部３ａがボールペンチップの後端により構成され，前記後側係止壁部９ａがインキ供給路内面に一体に形成されることを要件とする。 According to a second invention of the present application, in the ballpoint pen of the first invention, the front locking wall portion 3a is configured by a rear end of a ballpoint pen tip, and the rear locking wall portion 9a is integrated with an inner surface of the ink supply path. It must be formed.

前記第２の発明のボールペンは、前記前側係止壁部３ａがボールペンチップの後端により構成され，前記後側係止壁部９ａがインキ供給路内面に一体に形成されることによって、チップ本体３をインキ収容筒５の前端部に固着すると同時に環状鍔部８４を前記前側係止壁部３ａと前記後側係止壁部９ａとで挟持できる。 In the ballpoint pen of the second invention, the front locking wall portion 3a is constituted by the rear end of the ballpoint pen tip, and the rear locking wall portion 9a is integrally formed on the inner surface of the ink supply path, whereby the chip body 3 is fixed to the front end of the ink containing cylinder 5 and at the same time, the annular flange 84 can be sandwiched between the front locking wall 3a and the rear locking wall 9a.

尚、本発明で前記ボールペンチップ２が前記インキ収容筒５の前端部に固着される構成は、例えば、前記インキ収容筒５の前端部に直接固着される構成、またはインキ収容筒５の前端部にホルダー９等の別部材を介して固着される構成が挙げられる。 In the present invention, the configuration in which the ballpoint pen tip 2 is fixed to the front end portion of the ink storage cylinder 5 is, for example, a configuration in which the ball pen tip 2 is directly fixed to the front end section of the ink storage cylinder 5 or the front end portion of the ink storage cylinder 5. The structure fixed to another through another members, such as the holder 9, is mentioned.

本発明で前記インキ供給路は、インキ収容筒５内のインキがボール４に供給する通路である。前記インキ供給路は、例えば、前記ボールペンチップ２がインキ収容筒５の前端部に直接固着される構成の場合、前記ボールペンチップ２内部及び前記インキ収容筒５内部に形成され、あるいは、前記ボールペンチップ２がインキ収容筒５の前端部にホルダー９等の別部材を介して固着される構成の場合、前記ボールペンチップ２内部と前記インキ収容筒５内部と前記ホルダー９の内部に形成される。 In the present invention, the ink supply path is a path through which the ink in the ink containing cylinder 5 is supplied to the balls 4. For example, when the ball-point pen tip 2 is directly fixed to the front end portion of the ink storage cylinder 5, the ink supply path is formed inside the ball-point pen tip 2 and the ink storage cylinder 5, or the ball-point pen tip. 2 is fixed to the front end portion of the ink containing cylinder 5 via another member such as a holder 9, it is formed inside the ball-point pen tip 2, inside the ink containing cylinder 5, and inside the holder 9.

本発明で前記密着巻部は、線材が密着されて巻回される。前記密着巻部においてインキ流通は阻止される。 In the present invention, the tightly wound portion is wound with the wire being in close contact therewith. Ink circulation is prevented in the tightly wound portion.

本発明のボールペンによれば、落下等の衝撃が加わった場合でも、インキの前方移動に伴うスプリングの前方移動を回避し、ボールの脱落を十分に防止することができる。 According to the ballpoint pen of the present invention, even when an impact such as dropping is applied, the forward movement of the spring accompanying the forward movement of the ink can be avoided and the dropout of the ball can be sufficiently prevented.

本発明の第１の実施の形態の要部拡大縦断面図である。It is a principal part expanded longitudinal sectional view of the 1st Embodiment of this invention. 前記第1の実施の形態の全体を示す縦断面図である。FIG. 2 is a longitudinal sectional view showing the entirety of the first embodiment. 本発明の第２の実施の形態の要部拡大縦断面図である。It is a principal part expanded longitudinal cross-sectional view of the 2nd Embodiment of this invention. 本発明の第３の実施の形態の要部拡大縦断面図である。It is a principal part expanded longitudinal sectional view of the 3rd Embodiment of this invention. 本発明の第４の実施の形態の要部拡大縦断面図である。It is a principal part expanded longitudinal cross-sectional view of the 4th Embodiment of this invention.

＜第１の実施の形態＞
図１及び図２に本発明の第１の実施の形態を示す。図１の一点鎖線は、コイル部８の省略部分を示す。 <First Embodiment>
1 and 2 show a first embodiment of the present invention. A one-dot chain line in FIG.

・ボールペン
本実施の形態のボールペン１は、前端部にボール４を回転可能に抱持したボールペンチップ２と、該ボールペンチップ２の後部がその前部に圧入固着されたホルダー９と、該ホルダー９の後部がその前端開口部に圧入固着されたインキ収容筒５と、前記ボールペンチップ２の内部及びホルダー９の内部に収容配置されるスプリング６と、前記インキ収容筒５の後端開口部に圧入固着される尾栓１０とからなる。前記尾栓１０は、インキ収容筒５内と外気とを連通可能にする通気孔を有する Ballpoint pen The ballpoint pen 1 according to the present embodiment includes a ballpoint pen tip 2 that rotatably holds a ball 4 at a front end, a holder 9 in which a rear portion of the ballpoint pen tip 2 is press-fitted and fixed to the front portion, and the holder 9 An ink containing cylinder 5 whose rear part is press-fitted and fixed to the front end opening, a spring 6 accommodated and disposed inside the ball-point pen tip 2 and the holder 9, and a press fit into the rear end opening of the ink containing cylinder 5 The tail plug 10 is fixed. The tail plug 10 has a vent hole that allows the inside of the ink containing cylinder 5 to communicate with the outside air.

・ボールペンチップ
前記ボールペンチップ２は、チップ本体３とボール４とからなり、前記チップ本体３が前端にボール４を抱持する直円筒状の小径部３３と、該小径部３３より後方に連設されるテーパ部３４と、該テーパ部３４より後方に連設される直円筒状の大径部３５とからなる金属製筒体よりなる。前記金属製筒体は、例えば、ＳＵＳ３０４、ＳＵＳ３０５、ＳＵＳ３２１等のオーステナイト系ステンレス鋼により得られる。前記チップ本体３の小径部３３の前端近傍内面には、内方への押圧変形により、複数（例えば、４個）の内方突出部が周方向に等間隔に形成される。前記内方突出部によりボール受け座３２が形成される。また、チップ本体３の前端には、周状に内方に押圧変形されることにより、内向きの前端縁部３１が形成される。前記ボール受け座３２の前面と前記前端縁部３１の後面との間にはボール４が回転可能に抱持される。前記内方突出部の相互間には、中心部から径方向外方に延び且つ軸方向に貫通するインキ流通間隙が形成される。即ち、前記ボール受け座３２には、前記インキ流通間隙が形成される。前記ボールペンチップ２は、金属製チップ本体３の前端部にボール受け座３２を切削加工によって形成するタイプであってもよい。 Ballpoint pen tip The ballpoint pen tip 2 includes a tip body 3 and a ball 4, and the tip body 3 has a straight cylindrical small-diameter portion 33 that holds the ball 4 at the front end, and is connected to the rear of the small-diameter portion 33. And a large cylindrical portion 35 having a straight cylindrical shape connected to the rear of the tapered portion 34. The metal cylinder is obtained, for example, from austenitic stainless steel such as SUS304, SUS305, or SUS321. On the inner surface in the vicinity of the front end of the small-diameter portion 33 of the chip body 3, a plurality of (for example, four) inward protruding portions are formed at equal intervals in the circumferential direction by inward pressing deformation. A ball receiving seat 32 is formed by the inward protruding portion. Further, an inward front end edge 31 is formed at the front end of the chip body 3 by being pressed and deformed inwardly in a circumferential shape. A ball 4 is rotatably held between the front surface of the ball receiving seat 32 and the rear surface of the front end edge portion 31. Between the inward protruding portions, an ink circulation gap is formed that extends radially outward from the central portion and penetrates in the axial direction. That is, the ink circulation gap is formed in the ball receiving seat 32. The ballpoint pen tip 2 may be of a type in which a ball receiving seat 32 is formed by cutting at the front end of the metal tip body 3.

・ホルダー
前記ホルダー９は合成樹脂（例えば、ポリプロピレン）の射出成形によって得られる筒状体である。前記ホルダー９は、ボールペンチップ２が取り付けられる先細状の前部９１と、インキ収容筒５の先端面に当接する鍔部９２と、インキ収容筒５の前端開口部に圧入される後部９３とからなる。 Holder The holder 9 is a cylindrical body obtained by injection molding of a synthetic resin (for example, polypropylene). The holder 9 includes a tapered front portion 91 to which the ballpoint pen tip 2 is attached, a flange portion 92 that contacts the front end surface of the ink storage cylinder 5, and a rear portion 93 that is press-fitted into the front end opening of the ink storage cylinder 5. Become.

・インキ収容筒
前記インキ収容筒５は、合成樹脂（例えば、ポリプロピレン）の押出成形により得られる、両端が開口された円筒体である。前記インキ収容筒５の内部には、インキ５１と、該インキ５１の消費に伴って前進する高粘度流体からなる追従体５２が充填される。 Ink storage cylinder The ink storage cylinder 5 is a cylindrical body that is obtained by extrusion molding of a synthetic resin (for example, polypropylene) and is open at both ends. The ink containing cylinder 5 is filled with an ink 51 and a follower 52 made of a high-viscosity fluid that moves forward as the ink 51 is consumed.

・スプリング
前記スプリング６は、前部のロッド部７と、後部のコイル部８とが１本の金属線材（例えば、ステンレス鋼製線材）により一体に連設される。 Spring In the spring 6, a front rod portion 7 and a rear coil portion 8 are integrally connected by a single metal wire (for example, a stainless steel wire).

・ロッド部
前記ロッド部７は、軸方向に直線状に伸び、前記ボール受け座３２のインキ流通間隙に、挿通される。前記ロッド部７によって、直接、前記ボール４が前方に付勢され、それにより、前記ボール４が前記前端縁部３１の内周面に密接される。 Rod part The rod part 7 extends linearly in the axial direction and is inserted through the ink circulation gap of the ball receiving seat 32. The rod 4 directly biases the ball 4 forward, whereby the ball 4 is brought into close contact with the inner peripheral surface of the front edge 31.

・コイル部
前記コイル部８は、線材が螺旋状に巻回される。 -Coil part As for the said coil part 8, a wire is wound helically.

・閉鎖壁部
前記コイル部８の後端部には、軸心から拡径方向に平面状（円板状）に延設された密着巻部からなる閉鎖壁部８１が形成される。前記閉鎖壁部８１は、コイル部８の軸心から拡径方向に延設されるため、コイル部８の後端開口部を有効に閉鎖でき、落下等の衝撃が加わった際、前記インキ収容筒５内の大量のインキによる圧力が、コイル部８後端開口部を介してから直接ボール４に加わることを回避できる。前記閉鎖壁部８１は、後方より目視した際、渦巻き状に視認される。 Closed wall portion A closed wall portion 81 is formed at the rear end portion of the coil portion 8. The closed wall portion 81 is a tightly wound portion extending in a planar shape (disk shape) in the diameter increasing direction from the axis. Since the closing wall portion 81 extends from the axis of the coil portion 8 in the diameter increasing direction, the rear end opening portion of the coil portion 8 can be effectively closed, and when an impact such as dropping is applied, the ink storage It can be avoided that the pressure due to the large amount of ink in the cylinder 5 is applied directly to the ball 4 through the rear end opening of the coil portion 8. The closed wall portion 81 is visually recognized in a spiral shape when viewed from behind.

・流通壁部
前記閉鎖壁部８１の前方には、該閉鎖壁部８１の拡径側端部から軸方向前方に連設され且つ線材間に隙間を有する有効巻部からなる直円筒状の流通壁部８２が形成される。前記流通壁部８２の線材の隙間を介して筆記時、インキが流通可能となる。また、衝撃時、前記インキ収容筒５内のインキの前方移動により前記閉鎖壁部８１が前方に押圧されて、それにより、前記流通壁部８２が圧縮され、線材間の隙間が小さくなるため、一層、インキの前方移動を阻止することができる。なお、前記流通壁部８２の形状は、直円筒状以外にも、円錐状であってもよい。 -Circulation wall portion In front of the closed wall portion 81, a straight cylindrical flow consisting of an effective winding portion that is connected to the front side in the axial direction from the diameter-enlarged side end portion of the closed wall portion 81 and has a gap between the wires. A wall portion 82 is formed. Ink can be circulated at the time of writing through the gap between the wires of the flow wall portion 82. Further, at the time of impact, the closing wall portion 81 is pressed forward by the forward movement of the ink in the ink containing cylinder 5, thereby compressing the flow wall portion 82 and reducing the gap between the wire rods. Further, it is possible to prevent the ink from moving forward. The shape of the flow wall portion 82 may be a conical shape in addition to the right cylindrical shape.

・遮蔽壁部
前記流通壁部８２の前方には、該インキ流通壁部８２の前端より拡径方向に平面状に連設される密着巻部からなる環状の遮蔽壁部８３が形成される。前記遮蔽壁部８３は、軸線に対して垂直に形成されている。 -Shielding wall portion An annular shielding wall portion 83 is formed in front of the flow wall portion 82. The ring-shaped shielding wall portion 83 is formed of a tightly wound portion that is continuously provided in a planar shape in the diameter increasing direction from the front end of the ink flow wall portion 82. The shielding wall 83 is formed perpendicular to the axis.

・環状鍔部
前記遮蔽壁部８３の前方には、該遮蔽壁部８３の拡径側端部より軸方向前方に連設され且つ径方向外方に突出される密着巻部からなる環状鍔部８４が形成される。前記環状鍔部８４が、インキ供給路内に設けられる後側係止壁部９ａと、インキ供給路内に設けられる前側係止壁部３ａとにより、前後方向に挟持されて固定される。前記後側係止壁部９ａは、ホルダー９内面に一体に形成される。前記前側係止壁部３ａは、ボールペンチップ２のチップ本体３の後端面により構成される。即ち、前記ボールペンチップ２を前記ホルダー９の取付孔に圧入することにより、前記環状鍔部８４が前側係止壁部３ａと後側係止壁部９ａの間で前後に挟持される。環状鍔部８４が密着巻部よりなるため、前後に挟持した際、ボールペンチップ２がホルダー９から前方に浮き上がることがない。 -Annular collar part Annular collar part consisting of a tightly wound part that is provided in front of the shielding wall part 83 in an axially forward direction from the diameter-enlarged side end of the shielding wall part 83 and projects radially outward. 84 is formed. The annular collar 84 is sandwiched and fixed in the front-rear direction by a rear side locking wall portion 9a provided in the ink supply path and a front side locking wall part 3a provided in the ink supply path. The rear locking wall portion 9a is integrally formed on the inner surface of the holder 9. The front locking wall 3 a is constituted by the rear end surface of the tip body 3 of the ballpoint pen tip 2. That is, when the ball-point pen tip 2 is press-fitted into the mounting hole of the holder 9, the annular flange 84 is sandwiched forward and backward between the front locking wall 3a and the rear locking wall 9a. Since the annular collar portion 84 is formed of a tightly wound portion, the ball-point pen tip 2 does not float forward from the holder 9 when sandwiched forward and backward.

本実施の形態のボールペン１は、コイル部８の後端部に、軸心から拡径方向に延びる密着巻部からなる閉鎖壁部８１が形成されることにより、部品点数を増加させることなく、落下等の衝撃が加わった場合でもインキの前方移動によるボール脱落を防止することができる。 The ballpoint pen 1 of the present embodiment is formed with a closed wall portion 81 formed of a tightly wound portion extending in the diameter increasing direction from the axis at the rear end portion of the coil portion 8, without increasing the number of parts. Even when an impact such as dropping is applied, it is possible to prevent the ball from falling off due to the forward movement of the ink.

本実施の形態のボールペン１は、前記閉鎖壁部８１と遮蔽壁部８３とにより落下等の衝撃が加わった場合でもインキの前方移動によるボール脱落を防止でき、且つ、前記流通壁部８２により、インキ流通性を阻害せず筆記時にペン先からの十分なインキ吐出性が得られる。 The ballpoint pen 1 of the present embodiment can prevent the ball from falling off due to forward movement of ink even when an impact such as a drop is applied by the closed wall portion 81 and the shielding wall portion 83, and the circulation wall portion 82 Sufficient ink discharge from the pen tip can be obtained at the time of writing without impairing ink flowability.

本実施の形態のボールペン１は、前記閉鎖壁部８１が平面状の密着巻部からなるにより、落下等の衝撃時のボール４に加わるインキ圧力を一層緩和できる。 In the ballpoint pen 1 of the present embodiment, the closing wall portion 81 is formed of a flat tightly wound portion, so that the ink pressure applied to the ball 4 upon impact such as dropping can be further alleviated.

本実施の形態のボールペン１は、前記遮蔽壁部８３が平面状の密着巻部からなることにより、落下等の衝撃時のボール４に加わるインキ圧力を一層緩和できる。 In the ballpoint pen 1 according to the present embodiment, the ink pressure applied to the ball 4 at the time of impact such as dropping can be further relaxed because the shielding wall portion 83 is formed of a flat contact winding portion.

本実施の形態のボールペン１は、前記スプリング６がコイル部８を備え、該コイル部８が、径方向外方に突出される密着巻部よりなる環状鍔部８４を備え、前記インキ供給路内に、前記環状鍔部８４の前端が係止される前側係止壁部３ａと、前記環状鍔部８４の後端が係止される後側係止壁部９ａとを設け、前記前側係止壁部３ａと前記後側係止壁部９ａとの間で前記環状鍔部８４が前後方向に挟持されてなることにより、落下等に衝撃が加わった場合でも、インキの前方移動に伴うスプリング６の前方移動を回避し、ボールの脱落を十分に防止することができる。 In the ballpoint pen 1 of the present embodiment, the spring 6 includes a coil portion 8, and the coil portion 8 includes an annular collar portion 84 formed of a tightly wound portion protruding outward in the radial direction. Provided with a front locking wall portion 3a for locking the front end of the annular flange 84 and a rear locking wall portion 9a for locking the rear end of the annular flange 84. The annular flange 84 is sandwiched between the wall portion 3a and the rear locking wall portion 9a in the front-rear direction, so that even when an impact is applied to the fall or the like, the spring 6 accompanying the forward movement of the ink. It is possible to avoid the forward movement of the ball and sufficiently prevent the ball from falling off.

本実施の形態のボールペン１は、前記前側係止壁部３ａがボールペンチップ２の後端により構成され，前記後側係止壁部９ａがインキ供給路内面に一体に形成されることによって、チップ本体３をインキ収容筒５の前端部に固着すると同時に環状鍔部８４を前記前側係止壁部３ａと前記後側係止壁部９ａとで挟持できる。 In the ballpoint pen 1 of the present embodiment, the front side locking wall portion 3a is configured by the rear end of the ballpoint pen tip 2, and the rear side locking wall portion 9a is integrally formed on the inner surface of the ink supply path, thereby At the same time as fixing the main body 3 to the front end portion of the ink containing cylinder 5, the annular flange 84 can be held between the front locking wall portion 3a and the rear locking wall portion 9a.

＜第２の実施の形態＞
図３に本発明の第２の実施の形態を示す。図３の一点鎖線は、コイル部８の省略部分を示す。
本実施の形態のボールペン１は、第１の実施の形態の変形例であり、第１の実施の形態と異なる点は、閉鎖壁部８１が軸方向前方に向かうに従い次第に拡径する傾斜面状（円錐面状）の密着巻部からなる点と、遮蔽壁部８３が軸方向前方に向かうに従い次第に拡径する傾斜面状（円錐面状）の密着巻部からなる点である。 <Second Embodiment>
FIG. 3 shows a second embodiment of the present invention. A one-dot chain line in FIG. 3 indicates an omitted portion of the coil unit 8.
The ballpoint pen 1 of the present embodiment is a modification of the first embodiment, and is different from the first embodiment in that it has an inclined surface shape in which the diameter of the closing wall 81 gradually increases as it moves forward in the axial direction. This is a point composed of a (conical surface-shaped) tightly wound portion and a point composed of an inclined surface-shaped (conical surface-shaped) closely wound portion whose diameter gradually increases as the shielding wall portion 83 moves forward in the axial direction.

本実施の形態のボールペン１は、前記閉鎖壁部８１が、軸方向前方に向かうに従い次第に拡径する傾斜面状（円錐面状）の密着巻部からなることにより、筆記時、ボール４への円滑なインキ流通性が得られる。また、本実施の形態のボールペン１は、スプリング６をインキ収容筒５の前端開口部側から挿入する場合、傾斜面状（円錐面状）の密着巻部によりスムーズな挿入が可能となる。 The ballpoint pen 1 according to the present embodiment is configured such that the closing wall 81 is formed of an inclined surface-like (conical surface-shaped) tightly wound portion that gradually increases in diameter toward the front in the axial direction. Smooth ink distribution is obtained. In addition, when the spring 6 is inserted from the front end opening side of the ink containing cylinder 5, the ball-point pen 1 of the present embodiment can be smoothly inserted by the inclined surface (conical surface) closely wound portion.

本実施の形態のボールペン１は、前記遮蔽壁部８３が、軸方向前方に向かうに従い次第に拡径する傾斜面状（円錐面状）の密着巻部からなることにより、筆記時、ボール４への円滑なインキ流通性が得られる。また、本実施の形態のボールペン１は、スプリング６をインキ収容筒５の前端開口部側から挿入する場合、傾斜面状（円錐面状）の密着巻部によりスムーズな挿入が可能となる。 In the ballpoint pen 1 of the present embodiment, the shielding wall portion 83 is formed of an inclined surface-shaped (conical surface-shaped) tightly wound portion that gradually increases in diameter toward the front in the axial direction. Smooth ink distribution is obtained. In addition, when the spring 6 is inserted from the front end opening side of the ink containing cylinder 5, the ball-point pen 1 of the present embodiment can be smoothly inserted by the inclined surface (conical surface) closely wound portion.

尚、他の構成及び作用効果は第１の実施の形態と共通であるため、説明を省略する。 Since other configurations and operational effects are the same as those of the first embodiment, description thereof is omitted.

＜第３の実施の形態＞
図４に本発明の第３の実施の形態を示す。図４の一点鎖線は、コイル部８の省略部分を示す。
本実施の形態のボールペン１は、第１の実施の形態の変形例であり、第１の実施の形態と異なる点は、閉鎖壁部８１が軸方向前方に向かうに従い次第に拡径する傾斜面状（円錐面状）の密着巻部からなる点である。 <Third Embodiment>
FIG. 4 shows a third embodiment of the present invention. An alternate long and short dash line in FIG.
The ballpoint pen 1 of the present embodiment is a modification of the first embodiment, and is different from the first embodiment in that it has an inclined surface shape in which the diameter of the closing wall 81 gradually increases as it moves forward in the axial direction. This is a point composed of a conical winding portion.

＜第４の実施の形態＞
図５に本発明の第４の実施の形態を示す。図５の一点鎖線は、コイル部８の省略部分を示す。
本実施の形態のボールペン１は、第１の実施の形態の変形例であり、第１の実施の形態と異なる点は、遮蔽壁部８３が軸方向前方に向かうに従い次第に拡径する傾斜面状（円錐面状）の密着巻部からなる点である。 <Fourth embodiment>
FIG. 5 shows a fourth embodiment of the present invention. An alternate long and short dash line in FIG.
The ballpoint pen 1 according to the present embodiment is a modification of the first embodiment, and is different from the first embodiment in that the shielding wall portion 83 has an inclined surface shape that gradually increases in diameter toward the front in the axial direction. This is a point composed of a conical winding portion.

１ボールペン
２ボールペンチップ
３チップ本体
３ａ前側係止壁部（係止壁部）
３１前端縁部
３２ボール受け座
３３小径部
３４テーパ部
３５大径部
４ボール
５インキ収容筒
５１インキ
５２追従体
６スプリング
７ロッド部
８コイル部
８１閉鎖壁部
８２流通壁部
８３遮蔽壁部
８４環状鍔部
９ホルダー
９ａ後側係止壁部
９１前部
９２鍔部
９３後部
１０尾栓 1 Ballpoint pen 2 Ballpoint pen tip
3 Chip body 3a Front side locking wall (locking wall)
31 Front end edge portion 32 Ball receiving seat 33 Small diameter portion 34 Tapered portion 35 Large diameter portion 4 Ball 5 Ink receiving cylinder 51 Ink 52 Follower 6 Spring 7 Rod portion 8 Coil portion 81 Closing wall portion 82 Distribution wall portion 83 Shielding wall portion 84 Annular collar part 9 Holder 9a Rear locking wall part 91 Front part 92 Collar part 93 Rear part 10 Tail plug

Claims

A ball-point pen tip that rotatably holds a ball between an inward front end edge and a ball receiving seat formed at the rear thereof, the ball-point pen tip is fixed to the front end portion, and ink is directly stored in the inside. A ballpoint pen comprising: an ink storage cylinder formed therein; and a spring which is accommodated in an ink supply path behind the ball, urges the ball forward, and presses the ball against an inner surface of the front edge. ,
The spring includes a coil portion, and the coil portion includes an annular flange portion including a tightly wound portion protruding outward in the radial direction, and the front end of the annular flange portion is locked in the ink supply path. A front side locking wall part and a rear side locking wall part to which a rear end of the annular hook part is locked are provided, and the annular hook is provided between the front side locking wall part and the rear side locking wall part. A ballpoint pen characterized in that the portion is sandwiched in the front-rear direction.

2. The ballpoint pen according to claim 1, wherein the front side locking wall portion is configured by a rear end of a ballpoint pen tip, and the rear side locking wall portion is integrally formed on an inner surface of the ink supply path.