TWI300748B - Ball point pen tip and aqueous ball point pen using the same - Google Patents

Description

1300748 IX. DESCRIPTION OF THE INVENTION: TECHNICAL FIELD OF THE INVENTION The present invention relates to a ballpoint pen tip having a very small bead (ie, a bead having an outer diameter of less than 0.3 mm). [Prior Art] Conventionally, in the third aspect of Patent Document 1, the pen tip of the atomic pen is disclosed in the vicinity of one end of the metal thin tube, and equidistant from the end. Deformation toward the inner portion at a plurality of places to form an inwardly projecting support frame; and a bead inserted between the inward projection and the one end and having a diameter of less than 0.3 mm; and simultaneously performing the edge of the one end a crimping process toward the inner side to form a pen tip of the crimping portion; wherein the diameter of the ball is set to D, and the diameter of the inscribed circle of the inward protrusion is F, and the ball is pulled from the front end of the caulking portion When the protruding size is set to G, and the inner diameter of the caulking portion is set to Η, the following is satisfied: 0· 4$ F/DS 0· 6, , G/D ^ 0· 25 and 0. 005mm^ DH^ 0. 010mm relationship. (Patent Document 1) Japanese Patent Laid-Open Publication No. H03- 2 5 1 9 7 9 SUMMARY OF THE INVENTION (Problems to be Solved by the Invention) Generally, there are extremely small beads (that is, the outer diameter is not full. 3 mm Balls of the atom 6 312XP / invention manual (supplement) /94-05/94102999 1300748

In the case of the pen tip, as shown in Fig. 5, the pen beads will be buried in the paper during writing, and in almost all cases, the caulking portion will also be partially buried in the paper. In particular, when the writing pressure is large, the amount of embedding of the above-mentioned pen and the caulking portion in the paper will tend to be conspicuous. Therefore, the tip of the ballpoint pen with a very small pen will gradually wear along with the contact between the above-mentioned caulking portion and the paper during writing, resulting in a decrease in the holding force of the ball in the caulking portion, which may cause the pen bead to be in a short period of time. Falling off the outside. Further, in the above-described conventional ballpoint pen tip, in order to prevent the above-described ball off phenomenon, the thickness of the front end of the caulking portion is set to be thick. Therefore, from the beginning of writing, the outer peripheral edge of the front end of the caulking portion will come into contact with the paper, and a good writing feeling cannot be obtained. The pen tip of the above-mentioned Patent Document 1 attaches importance to the elimination of the stagnation feeling at the time of writing, suppresses the amount of caulking deformation of the caulking portion to a small state, and compares the ratio of the protruding size of the ball to the outer diameter of the bead, as in the general case. The ball (for example, the outer diameter of 0.5 mm) is set to a large state. As a result, the tip of the ballpoint pen of the above-mentioned Patent Document 1 is difficult to prevent the occurrence of the ball off phenomenon after a long period of time. Further, in the pen tip of the above-mentioned Patent Document 1, since the amount of inward protrusion of the pen holder is set to a small state, it is difficult to sufficiently prevent the wear of the bead holder. Therefore, as the writing causes the bead holder to be subjected to greater wear, the amount of movement of the ball in the ball-retaining hole in the axial direction (i.e., the gap between the cuff portion and the bead) is increased. Therefore, at the time of writing, the inner peripheral edge of the front end of the caulking portion pulls the paper, and not only a good writing feeling is not obtained, but also a phenomenon in which foreign matter such as paper lint is mixed into the ball holding portion (hereinafter referred to as "paper jam") may occur. Due to the above paper clogging, the ink effluent and the smooth rotation of the ball will be hindered, and the handwriting water will be broken, or in the 7 312XP/invention manual (supplement)/94-05/94102999 1300748 Although there is still ink remaining in the inside but it is impossible to write. Further, the above-described water-based ball pen having a very small pen can obtain a handwriting of a thin line width, and is most suitable for writing a note on a notepad or the like. However, the above-mentioned water-based ball pen with a very small pen will cause handwriting to bleed or the handwriting to fly white due to slight difference in ink effluent (error), and it is feared that an appropriate thin line width handwriting cannot be obtained. The present invention has been made to solve the above problems, and an object of the present invention is to provide a ballpoint pen tip which has a very small pen bead but which can prevent the pen ball from falling off and has no writing off water for a long period of time, and has sufficient writing performance; Very small pen, but still can not cause handwriting water, the pen tip with full writing performance; cum provides a pen tip that can prevent the ball from falling off even after a long period of time. Furthermore, the present invention has been made to solve the above-mentioned conventional problems, and provides a very small writing bead which has an outer diameter of less than 0.3 mm, but can obtain a good writing feeling from the beginning of writing. Even if you continue writing, you can maintain a good sense of writing when you start writing, and you can consume the filling ink to the last tip of the ballpoint pen without causing paper jam or pen drop. Furthermore, the present invention has been made in view of the above-mentioned conventional problems, and provides an aqueous ballpoint pen which can obtain a very thin line width handwriting without causing handwriting bleed or handwriting whitening. (Means for Solving the Problem) In order to solve the above problems, the inventors of the present invention have focused on the following a., b.: a. having a very small pen tip pen tip (especially a thin 312XP with a very small pen bead/invention manual (complement) Piece) /94-05/94102999 1300748 font tip pen tip) is pointed at the front end, as shown in Figure 5, in the ordinary writing pressure, regardless of the protruding size of the ball, the tapered front end of the crimped portion It is often buried deep in the paper, causing the paper to be temporarily recessed. Therefore, by setting the above-described projection size of the ball to a certain extent, the temporarily recessed paper can be sufficiently brought into contact with the pen to obtain sufficient writing performance without the occurrence of off-water.

b. In the case of a ballpoint pen with a very small pen, because it is written in fine words (for example, writing on a part of a notepad, a printed document, etc.), it is not required to have a general outer diameter pen (for example) Outer diameter 0.5mm Pen) A pen-like smooth writing feel. The inventors of the present invention have focused on the above matters, and have completed the present invention through intensive research. (1st invention) The first invention of the present invention is characterized in that the inner side of the front end of the metal body 2 is formed with a ball-receiving seat 3, and the outer side of the ball-receiving seat 3 is accommodated with an outer diameter of less than 0.3 mm. The ball 5 is formed by deforming the tapered front end portion 2 1 of the metal body 2 into a circumferential shape to form a crimping portion 4, and is rotatable between the ball receiving receptacle 3 and the crimping portion 4. Holding the pen 5 and causing a part of the pen 5 to protrude from the front end of the caulking portion 4 at the front of the ballpoint pen tip 1;

When the outer diameter of the ball 5 is set to A, the inner diameter of the crimping portion 4 is Η, and the protruding size of the ball 5 protruding from the front end of the caulking portion 4 is L, it satisfies: 0. 010 mm < A -H< 0. 035mm and 9 312XP/invention manual (supplement) /94-05/94102999

1300748 0. 1 5 < L / A < 0.30 relationship (application patent scope 1). The tip of the ballpoint pen 1 of the above-mentioned patent application scope 1 is the difference between the outer diameter A of the pen and the inner diameter of the inner diameter A by the diameter A of the pendulum when the outer diameter A is less than 0.3 mm (mm). When it is larger than 0.010 mm (millimeter) (i.e., 0 < A - Η), the beads can be prevented from falling off for a long period of time. The reason is that if the difference A - Η値 between the inner diameter and the inner diameter of the caulking portion 4 is less than 0. 0 1 0 mm (in the case of S 0 . 0 10 mm), the amount of caulking deformation will become smaller, with The writing piece, from the beginning of use, will be afraid of a bead situation in a short period of time. Furthermore, the tip of the ballpoint pen according to item 1 of the above-mentioned patent application scope is set to be larger than 0 by the ratio L / A of the outer diameter A of the bead protrusion ruler when the outer diameter A of the pen bead 5 is less than 0.3 mm. · 1 5 (ie, 0 · 1 5 < When writing, the contact between the pen 5 and the paper can be maintained under normal writing pressure, and the proper rotation of the pen 5 is maintained, and the problem of not writing off the water is maintained. The reason is that if the ratio L / A of the protrusion L of the pen to the diameter A is less than 0 · 1 5 (ie, L / AS 0 · 1 5 ), the pen 5 is written on the paper 9 The paper will be out of the paper 9 and the handwriting is broken. In addition, the tip of the ballpoint pen of the first application of the above patent scope has a difference A - Η値 between the outer diameter A of the ball and the inner diameter 敛 of the caulking portion 4, and is set to 0.035 mm ( Mm) (ie, A-H < 0.035mm), can easily fill the relationship of "0.15 < L / A", with the avoidance of handwriting water loss. The reason is that if the above A-Η値When it is 0.0 3 5mm or more, the 312XP/invention manual (supplement)/9屯05/94102999 is the outer diameter of the bead of the pen. The outer diameter of the bead is 010. The AH is stripped by the strip 1 and the length L is L/A). Zhang 9 There induced hair when the outer inclined beads pen 1 will occur, based preferably less than foot portion of the case toward the slit 10

1300748 Inwardly, the amount of deformation of the caulking will increase, and it is difficult to obtain sufficient pendulum protrusions. Further, the ballpoint pen of the first application of the above patent scope is by the pen-bead protruding dimension L to the outer diameter of the bead A. Compared with L/A値, set to 0. 3 0 (ie, L / A < 0 . 3 0 ), the gap between the caulking portion 4 and the ball 5 can be ensured, and sufficient ink efflux can be obtained at the time of writing. . The reason is that when the ratio L of the protruding bead L to the outer diameter A of the bead is L/A 値 0.30 or more 0. 3 0 $ L / A ), if it is satisfied, it can be prevented to prevent the above-mentioned ball from being fully caulked. However, the required requirement is "0. 01 Omm S A-Η", and the gap between the caulking portion 4 and the pen bead 5 must be reduced. As a result, there is a fear that the handwriting will be broken due to insufficient ink outflow. The ballpoint pen tip 1 of the above-mentioned patent application scope 1 is preferably 0. 010 mm < A-H < 0. 030 mm and 0. 15 < L/A < 0.25 (application patent item 2). The tip 1 of the ballpoint pen according to item 2 of the above patent application is set to 0.03 0111111 (i.e., 4-11 < 0.0 3 0111111) by the difference A-Η値 between the outer diameter A of the bead and the inner diameter 敛 of the caulking portion 4. It is easier to satisfy the above-mentioned "L/A" relationship, which is conducive to avoiding the occurrence of handwriting water cuts. In addition, the ratio L/A 笔 of the bead protrusion size L to the outer diameter 笔 of the bead is set to 0 · 2 5 (ie, L / A < 0 · 2 5 ), which will be used to properly hold the ball. It is easy to set the amount of the caulking deformation, and it is possible to further secure the gap between the caulking portion 4 and the bead, and sufficient ink outflow property can be obtained at the time of writing. 312XP / invention manual (supplement) / 9105 / 941 〇 2999 size is less than the difference between the two (ie, the falling system, when writing, the pen is less than 0.15 by less than the part of the convergence of 5 11 1300748 (the second invention) The second invention is characterized in that the ball-receiving seat 3 is formed at the inner surface of the front end of the metal body 2, and the ball 5 having an outer diameter of less than 0.3 mm is accommodated on the front side of the ball-receiving seat 3, The crimping portion 4 is formed by deforming the tapered front end portion 2 1 of the metal body 2 inwardly into a circumferential shape, and the ball 5 is rotatably held between the ball receiving receptacle 3 and the crimping portion 4 And causing a part of the ball 5 to protrude from the front end of the caulking portion 4 at the front of the ballpoint pen tip 1;

When the outer diameter of the ball 5 is set to A, and the protrusion size of the pen 5 protruding from the front end of the caulking portion 4 is set to L, it satisfies: 0. 15 < L/A < 0.25 relationship (patent pending) Item 3 of the scope). The tip of the ballpoint pen 1 according to item 3 of the above-mentioned patent application is when the outer diameter A of the pen 5 is less than 0.3 mm, by the ratio L of the protrusion L of the pen to the outer diameter A of the bead L It is set to be greater than 0.15 (ie, 0.15CL/A). When writing, the contact between the pen 5 and the paper 9 can be maintained under normal writing pressure, and the proper rotation of the pen 5 is maintained, so that the pen does not occur. Φ Traces of water cuts. The reason is that if the ratio L of the protruding bead L to the outer diameter A of the bead is less than 0 · 15 (ie, L / AS 0 · 1 5 ), when leaning on the paper 9 for writing, The pen 5 will leave the paper 9 and there is a fear that the handwriting will be broken. Furthermore, the pen tip 1 of the above-mentioned patent application scope 3, when the outer diameter A of the pen 5 is less than 0, 3 mm, by the ratio L of the pen-projecting dimension L to the outer diameter A of the bead L / A値 Set to less than 0 · 2 5 (ie, L / A < 0 . 2 5 ), the setting of the caulking deformation of the caulking portion that properly holds the pen ball can be changed to 12 312XP / invention manual (complement ()) /94-05/94102999 1300748 Easy to ensure the gap between the caulking portion 4 and the ball 5, and sufficient ink bleed when writing.

(Third Invention) The third invention of the present invention is characterized in that the ball-receiving seat 3 is formed on the inner surface near the front end of the metal body 2, and the outer diameter of the front side of the ball-receiving seat 3 is not more than 0. 3mni The ball 5 is formed by deforming the tapered front end portion 2 1 of the metal body 2 into a circumferential shape to form a caulking portion 4, and is rotatable between the ball receiving holder 3 and the caulking portion 4. Holding the ball 5 and causing a part of the ball 5 to protrude from the front end of the caulking portion 4 to the front of the ballpoint pen tip 1; wherein, when the outer diameter of the ball 5 is set to A, the caulking portion 4 is When the inner diameter is set to Η, it satisfies: 0. 010mm<A-H< 0. 035mm relationship (application patent item 4). The tip of the ballpoint pen 1 according to item 4 of the above patent application is when the outer diameter A of the pen 5 is less than 0.3 mm (mm), by the difference between the outer diameter A of the ball and the inner diameter of the caulked portion 4. A-Η値, set to be larger than 0.010 mm (ie, 0.010 mm < Φ A - Η ), can prevent the beads from falling off for a long period of time. The reason is that if the difference A - Η値 between the outer diameter A of the bead and the inner diameter 敛 of the caulking portion 4 is less than 0. 0 1 0 mm (that is, when A - Η $ 0 . 0 1 0 m πι), The amount of the caulking deformation of the caulked portion will be small, and the use of the writing conditions will cause the pen to fall off in a short period of time from the beginning of use. Furthermore, the tip 1 of the ballpoint pen according to item 4 of the above patent application is when the outer diameter A of the ball 5 is less than 0.3 mm, by the difference A between the outer diameter A of the ball and the inner diameter of the caulking portion 4. -Η値, set to less than 0.035mm (ie, A-H<13 312XP/invention manual (supplement)/94-05/94102999 1300748 0.0 3 5 mm), the needle protrusion size L can be easily set to Even if the writing is made oblique to the paper 9, the handwriting is not broken. If A-Η 値 is above 0 · 0 3 5 mm (ie 0. 0 3 5 mm $ A - Η ), the amount of caulking deformation of the caulking portion will become larger, and the protrusion size L of the bead will be freely set. The degree will be reduced, and it is quite difficult to set the protruding size L of the ball to be such that when the writing is made obliquely to the paper 9, the handwriting is not broken. Preferably, the above A-Η値 is less than 0.030 mm (i.e., Α -H < 0.030 mm), and it is easier to set the pen-projecting size L so that even if the writing is performed obliquely to the paper 9, the handwriting is not broken. The ballpoint pen tip 1 according to any one of the above-mentioned claims, wherein the diameter of the imaginary inscribed circle drawn at the center of the pen holder accommodating seat 3 is set to B, which satisfies: B/ A < 0.4 relationship (part 5 of the scope of patent application). The ratio B / A 对 of the imaginary inscribed circle diameter B (hereinafter referred to as "the inner circumference of the pen holder seat B") drawn by the center of the above-described pen holder holder 3 to the outer diameter A of the bead is set to Less than 0 · 4 (ie, B / A < 0 · 4 ), the wear of the pen holder can be fully suppressed. This makes it possible to avoid the occurrence of poor writing (writing off water or writing) due to paper jam, and to obtain smooth ink flowability and good writing feeling over a long period of time. Further, the above B / A 値 is preferably greater than 0.25 (i.e., 0·25 < Β / Α). If the B/A turns below 0.25, since the inner diameter Β of the bead holder 3 will become extremely small, it will be difficult to manufacture the pen accommodating seat 3 in manufacturing. The above B / Α値 is more effective than greater than 0.3 (ie, 0.3 < B / A). 14 312XP/Invention Manual (supplement)/94-05/94102999

1300748. The original body 1 according to any one of the first to fifth aspects of the above-mentioned patent application is provided with a shape portion 2 2 behind the tapered front end portion 2 1 of the metal body 2, and the long cylindrical portion 2 2 The diameter D is preferably less than 0. D < 0·5 mm) (item 6 of the patent application). When the outer diameter D of the long cylindrical portion 2 2 is less than 0 · 5 mm (mm), as shown in FIG. 5, the tip end portion of the pen tip 1 will form a needle-like tip, and the caulking portion 4 will be more easily buried in the sheet 9. Due to the contact with the joint, the caulked portion 4 is worn, and the seizing of the ball will occur from a short period of time. However, applying for the patent pen of the pen tip 1 will make the first to the first part of the above-mentioned patent application effective, and it will be fully preventable for a long period of time. That is, by the sixth item of the patent application, it is possible to obtain a ball-point pen having a very small type of pen which can stop the pen-bead falling off: In addition, the long cylindrical portion 2 2 is formed from the tapered front end portion 2 1 The rear side is formed at least from the rear end of the tapered front end portion 2 1 to the vicinity of the pen 3. Of course, the long cylindrical portion 22 may be formed from the rear end of the tapered shape 1 to the rear end of the metal body 2. With the above length 2 2, the tip of the ballpoint pen tip can be obtained. The OD of the pen tip 5 is preferably 0.15 mm to 0.29 mm, and the outer diameter D of the portion 22 is preferably 0.30 mm to 0. 49 ππη( The scope of the patent is as in the pen tip 1 of the above-mentioned patent application scope 7, the outer diameter of the bead 5 is preferably 0.25 mm to 0.28 mm, and the outer diameter D of the above portion 2 is preferably 0. 4 0 mm. ~0. 4 8 mm (Chongqing patent range 312XP/invention manual (supplement)/94-05/94102999 sub-pen tip long cylinder, 5 mm (ie, when, it will be like the state, use it in paper 9 In the fifth item and the fifth item, the anti-tip 10 is connected to the end of the bead-receiving end portion 2 1 in the cylindrical portion, and the upper long cylindrical shape is the seventh item). The stylus pen tip 1 of any one of the above-mentioned claims, wherein the tip of the tip of the metal body 2 is pressed and deformed inward by the side wall of the front end of the metal body 2, A pen holder accommodating seat 3 is formed on the inner surface of the front end of the metal body 2 (the ninth item of the patent application), whereby a fine-shaped atom having a very small pen can be easily obtained. Pen tip.

The ballpoint pen tip 1 according to any one of the above-mentioned claims, wherein the inner surface of the front end of the metal body 2 is preferably subjected to a cutting process, and the inner surface of the front end of the metal body 2 is formed into a pen accommodating. Block 3 (application for patent range 10). This makes it easy to get a cutting-point pen tip with a very small bead. Further, in the present invention, the "outer diameter 5 of the above-mentioned pen 5" means the diameter of the pen 5 . In the present invention, the above-mentioned "ball projection size L" refers to a length in which the ball 5 protrudes forward from the front end of the caulking portion 4 in the axial direction in a state where the ball 5 abuts against the ball holder 3. In the present invention, the "inner diameter Η" of the caulking portion 4 means an inner diameter which is formed in the radially inner side of the inner surface of the caulking portion 4 to form a circumferentially most protruding portion. (4th invention) The present inventors have found that even a pen tip having a small outer diameter of less than 0.3 mm has a positively inwardly deformed caulking portion during writing, even if the pen is accommodated. The seat is subject to wear and tear, and the amount of movement of the ball in the ball-retaining hole in the axial direction can be suppressed. That is, the element of the fourth invention of the present invention forms the ball-receiving seat 3 on the inner surface of the front end of the metal body, and the ball-shaped ball having an outer diameter of less than 0.3 mm (mm) is accommodated on the front side of the ball-receiving seat 3 5, the outer peripheral surface of the tapered front end portion 2 1 of the metal body is deformed into a circumferential shape, thereby forming the outer peripheral surface 16 312XP / invention manual (supplement) / 94-05 / 94102999 1300748 having a conical surface 4 The crimping portion 4 of the first embodiment is configured such that the ball 5 is rotatably held between the ball housing holder 3 and the crimping portion 4, and a part of the ball 5 is protruded forward from the front end of the caulking portion 4. The tip of the ballpoint pen 1; wherein the front end wall thickness T of the caulking portion 4 is set to be less than 2 //5 m (micrometers), and the caulking portion 4 can be inwardly deformed in accordance with the contact with the paper during writing (patent pending) Scope item 47).

With the above configuration (article 47 of the patent application), even if the bead holder 3 is subjected to abrasion, since the contact with the paper at the time of writing causes the caulking portion 4 to be deformed inward, the front end of the caulking portion 4 is caused. The inner diameter of the portion is reduced, so that an increase in the amount C of movement of the ball 5 in the axial direction can be suppressed. As a result, the good writing feeling at the beginning of writing can be maintained without causing paper jam or pen drop, and the filling ink can be consumed to the last drop. The front end wall thickness T of the above-mentioned caulking portion 4 is in the range of 〜25//m (best

l/zm~15//m) will be valid. If the front end wall thickness T of the caulking portion 4 is less than 1 // m, it is difficult to form the caulking portion 4 having an appropriate shape in manufacturing. On the other hand, if the front end wall thickness T of the caulking portion 4 exceeds 25/zm, the outer peripheral edge of the front end of the caulking portion 4 will strongly contact the paper, and it is not possible to obtain a good writing feeling at the beginning of writing, and it is impossible to use between the paper and the paper. When the contact is made, the caulking portion 4 is sufficiently deformed inward. If the writing is continued, the amount of movement C of the ball 5 in the axial direction is increased by the wear of the bead holder 3, and paper jam may occur. Further, as shown in FIG. 2, the front end wall thickness T of the caulking portion 4 is obtained by obtaining an imaginary line m extending forward from the conical surface 41 of the outer peripheral surface of the caulking portion 4 and a radial direction from the inner peripheral edge of the front end of the caulking portion 4. The intersection of the imaginary line η extending outside 17 312 ΧΡ / invention manual (supplement) / 9105/941 〇 2999 1300748 P, the distance between the intersection point P and the inner periphery of the front end of the caulking portion 4 is measured immediately before writing is started. Thereby, even if the outer peripheral edge of the front end of the caulking portion 4 has a curved shape (R shape), the front end wall thickness T of the caulking portion 4 can be specified. Further, the outer diameter A of the pen 5 of the present invention is 0.1 mm or more and 0.3 mm is not full (preferably in the range of 0.1 mm to 0·29πιηι, particularly preferably in the range of 0.2 mm to 0.29 mm). effective. Further, in the pen tip 1 of the above-described configuration (article 47 of the patent application), it is preferable to move the amount of the holding bead 5 between the pen accommodating seat 3 and the caulking portion 4 in the axial direction. C is set to 3#m~18//m (preferably 4 // m~1 5 // m ) (application patent item item 48). With the pen tip 1 of the above-described configuration (article 48 of the patent application), sufficient ink bleed and good writing feeling can be obtained from the beginning of writing. If the amount of movement of the ball 5 in the axial direction is less than 3 # m, the ink bleed will be insufficient, and the whitening of the handwriting may occur. On the other hand, when the axial movement amount C of the ball 5 exceeds 18/zm, the inner peripheral edge of the front end of the caulking portion 4 will pull the paper at the time of writing, and a smooth writing feeling cannot be obtained, and from the beginning of writing using I, Paper jams are prone to occur in a short period of time. Further, the axial direction movable amount C of the pen 5 of the second application of the above-mentioned patent application is measured immediately before writing is started. In the ballpoint pen tip 1 of the above-described configuration (article 47 of the patent application), it is preferable that the amount of protrusion L from the front end of the caulking portion 4 toward the axial direction is 15% or more of the outer diameter A of the bead A. % is not full (Article 49 of the patent application scope). With the pen tip 1 of the above configuration (Patent No. 49 of the patent application), the paper and the pen 18 312XP/invention specification (supplement)/94-05/ will be maintained during writing, even if the writing is inclined to the paper. 94102999 1300748 The contact between the beads 5 does not cause any whitening or writing failure. At the time of writing, the front end of the caulking portion 4 is in full contact with the paper, and the caulking portion 4 is appropriately deformed inward.

If the protruding amount L of the above-mentioned pen 5 is less than 15% of the outer diameter A of the pen, when writing, when the writing is inclined to the paper, only the caulking portion 4 contacts the paper and the pen 5 leaves the paper to cause writing. I am afraid that the handwriting will be white. On the other hand, when the amount of protrusion L of the above-mentioned pen 5 exceeds 25 % of the outer diameter A of the bead, only the pen 5 is in contact with the paper at the time of writing, and it is feared that the contact with the paper cannot be utilized, and the caulking portion 4 is appropriately oriented. Internal deformation. In addition, the penet 5 protrusion amount L of the above-mentioned application patent item No. 47 is measured immediately before writing is started. In the ballpoint pen tip 1 of the above-described configuration (article 4 of the patent application), when the imaginary line m extending from the conical surface 41 of the outer peripheral surface of the caulking portion 4 toward the front is drawn, it is preferable that the pen bead 5 does not protrude forward. Beyond the above imaginary line m (the 50th item of the patent application scope). According to the pen tip 1 of the above-mentioned structure (the 50th item of the patent application), the outer peripheral edge of the front end of the caulking portion 4 can be more strongly contacted with the paper at the rear end corner of the caulking portion 4, and the caulking portion 4 can be more easily performed. Deformed inward. (Fifth invention) The fifth invention of the present invention is characterized in that it is provided with a ballpoint pen tip in the tip end, and is rotatably held by a ballpoint pen tip having an outer diameter of less than 0.3 mm (millimeter) pen 5 1. The water-based ink 8 1 a is accommodated therein to constitute an aqueous ballpoint pen 6 capable of discharging the ink from the tip end of the pen tip 1; wherein the ball in the ball-retaining hole 2 3 is movable in the 5-axis direction The amount C is 1 8 // m (micrometer) or less (preferably 1 5 # m or less) (patent application scope 19 312XP / invention manual (supplement) / 94-05/94102999 1300748 51 item). The water-based ballpoint pen 6 of the above-mentioned patent application section 51 is set to be less than 1 8 // m (preferably 1 5) by moving the pen-axis 5-axis movable amount C in the pen-ball retaining hole 2 3 . Below m), the ink is excessively discharged from the tip end of the tip of the ballpoint pen, and the handwriting of the extremely thin line width can be obtained without causing the handwriting to bleed. If the amount of movement of the ball in the 5-axis direction of the ball-retaining hole 2 3 exceeds 18 mm, the ink will excessively flow out from the front end of the pen tip 1 of the ball, resulting in the occurrence of handwriting bleed, and the width of the thin line cannot be obtained. Handwriting. Further, it is preferable that the movable amount C of the above-mentioned ball in the 5-axis direction is 3//m or more, whereby sufficient ink bleed property can be obtained, and there is no fear of handwriting flying. In addition, the movable amount C of the pen-ball in the 5-axis direction is preferably in the range of 4 // m or more and 15 m or less, thereby further preventing the handwriting from being scattered, preventing the occurrence of the whitening of the handwriting, and obtaining appropriate Very thin line width handwriting. For the water-based ball pen of the above-mentioned patent application No. 51, the ink consumption in the writing distance I 0 m~1 0 m is preferably less than 60 mg (mg) (preferably less than 50 mg). Apply for patent coverage item 52). By the ink consumption within the writing distance of 0 m~1 0 0 m is less than 60 mg (preferably less than 50 mg), the ink can be prevented from excessively flowing out, and the handwriting is not caused to be obtained. Handwriting with a thin line width. If the ink consumption in the above writing distance is 0 m to 1 0 0 m is more than 60 m g, the ink will excessively flow out from the tip end of the pen tip 1, and the handwriting is scattered, and the handwriting of the extremely thin line width cannot be obtained. In addition, the above-mentioned writing distance 20 312XP / invention manual (supplement) / 94-05 / 94102999 1300748 0 m ~ 1 0 0 m ink consumption, from the point of view of preventing ink outflow and not causing handwriting whitening Preferably, it is 8 in g or more (preferably 1 0 mg or more). That is, the ink consumption amount in the writing distance of 0 m to 1 0 0 m is 8 m g or more and 60 mg is not full (preferably 10 mg or more and 50 mg is not full, and particularly preferably 20 mg or more and 50 m g is not full). With the ink consumption in the above range, it is possible to obtain a handwriting with a very thin line width without the presence of the handwriting and the absence of the handwriting.

The water-based ball pen 6 of the above-mentioned patent application, wherein the outer diameter of the ball 5 is 0.1 mm or more and 0.3 mm is not full (preferably 0.1 mm to 0.29 mm, particularly 0.2 mm to 0.29 mm). Preferably, the pen ball in the above-mentioned ball-retaining hole 23 can move 5 times in the direction of the C-axis 3//m~18//m (preferably 4 from m to 1 5 // m); the above writing distance is 0. The ink consumption in m~1 0 0 m is 8 mg or more and 60 mg is not full (preferably 10 mg or more and 50 mg is not full) (P.53 of the patent scope). With the water-based ballpoint pen 6 of the above-mentioned patent application, item 530, it is possible to obtain a handwriting with a very thin line width without a handwriting bleed condition and without a white hand. The water-based ball pen 6 of the above-mentioned patent application No. 51, wherein the axial direction protrusion amount L of the ball 5 is less than 15% or more than 25% of the outer diameter of the pen ball 5 (Patent No. 5 of the patent application) ). With the fifth item of the above-mentioned patent application, even if the writing is inclined to the paper, sufficient writing can be performed without the pen 5 moving away from the paper, and the above-mentioned extremely thin line width handwriting can be easily set. The appropriate amount of movement of the pen 5 in the direction of the axis C. If the axial direction of the ball 5 is 21 312XP/invention manual (supplement)/94-05/94102999 1300748, the amount L is less than 15% of the outer diameter of the pen 5, when the pen is inclined for writing, the pen Bead 5 will leave the paper and cannot write, and there will be a whitening of the handwriting. Further, when the amount L of the axial direction of the ball 5 exceeds 25% of the outer diameter of the ball 5, between the ball 5 for securing the proper ball holding force and the crimping portion 4 of the ball holding hole 2 3 The gap will be small, and the amount of movement of the ball 5 in the 5-axis direction in the above-described ball-holding hole 2 3 will be difficult to set appropriately. (effect of the invention)

By applying the first item of the patent scope, although it has a very small pen, it can still obtain a pen tip with a sufficient writing performance for preventing the occurrence of the ball off during a long period of time and without the handwriting being broken. With the second paragraph of the patent application, although it has a very small pen, it can still obtain a pen tip with a more sufficient writing performance, which can prevent the ball from falling off for a long period of time and has no fingerprints and water. With the third paragraph of the patent application, although it has a very small pen, it can still obtain a pen tip with sufficient writing performance without handwriting. With the fourth paragraph of the patent application, although it has a very small pen, it can still obtain a pen tip that can prevent the ball from falling off for a long period of time. By applying the fifth item of the patent scope, it is possible to sufficiently suppress the wear condition of the pen holder, and it is possible to avoid a writing failure due to paper jam, and to obtain smooth ink outflow and good writing feeling over a long period of time. By applying the sixth item of the patent scope, a fine-character ballpoint pen tip having the effect of the first item of the above-mentioned patent application range can be obtained. By applying the seventh item of the patent scope, it is possible to surely obtain the fine-character type ballpoint pen tip having the effect of the first item of the above-mentioned application patent range. 22 312XP/Invention Manual (Supplement)/94-05/94102999 1300748 By applying the eighth item of the patent scope, it is possible to more reliably obtain the fine-character type ballpoint pen tip having the effect of the first item of the above-mentioned patent application. By applying for the ninth item of the patent scope, it is easy to obtain a fine-shaped ballpoint pen tip with a very small bead. By applying for patent item 10, it is easy to obtain a cutting-point ballpoint pen tip with a very small ball.

By applying for the first item of the patent range, it is possible to sufficiently suppress the wear of the bead holder, avoiding the writing failure due to paper jam, and obtaining smooth ink outflow and good writing feeling over a long period of time. By applying the first item of the patent scope, the tip of the fine-character ballpoint pen having the effect of the third item of the above-mentioned patent application can be obtained. By applying the third item of the patent scope, the nib-type ballpoint pen tip having the effect of the third item of the above-mentioned patent application range can be obtained. By applying the 14th item of the patent scope, the nib-type ballpoint pen tip having the effect of the third item of the above-mentioned patent application can be obtained.

By applying for the fifteenth patent range, you can easily obtain a fine-grained ballpoint pen tip with a very small pen. By applying the patent scope item 16.6, it is easy to obtain a cutting-type ballpoint pen tip with a very small pen. By applying for the 17th item of the patent range, it is possible to sufficiently suppress the wear of the bead holder, avoiding the writing failure due to paper jam, and obtaining smooth ink outflow and good writing feeling over a long period of time. By applying for the 18th item of the patent scope, the nib-type ballpoint pen tip having the effect of the fourth item of the above-mentioned patent application can be obtained. 23 312XP/Inventive Manual (Replenishment)/94·05/94102999 1300748 By applying the 19th item of the patent scope, it is possible to obtain a fine-type ballpoint pen tip having the effect of the fourth application of the above-mentioned patent application. By applying for the 20th item of the patent scope, the nib-type pen tip with the effect of the fourth item of the above-mentioned patent application can be obtained more surely. By applying for the second paragraph of the patent scope, it is easy to obtain a fine-shaped ballpoint pen tip with a very small pen. By applying for the second item of patent scope, it is easy to obtain a cutting-type ballpoint pen tip with a very small pen.

By applying for the 23rd patent range, although it has a very small ball with an outer diameter of 0.3 mm, it can still get a good writing feeling from the beginning of writing, and can continue to use it even if it continues to write. The good writing feel when writing, while not causing paper jam or pen drop, the filling ink can be consumed to the last drop. By applying for the 24th item of the patent scope, sufficient ink effluent and good writing sensation can be obtained from the beginning of writing. By applying for the 25th item of the patent scope, even if it is inclined to write on the paper during writing, the contact between the paper and the pen can be maintained, and there is no concern that the handwriting may be white or impossible to write, and the front end of the caulking portion is written during writing. The paper will be sufficiently in contact with the paper, and the caulking portion can be appropriately deformed inward. By applying the 26th item of the patent range, it is possible to make the outer peripheral edge of the front end of the caulking portion more strongly contact and the paper at the rear end corner portion of the caulking portion, and the inward deformation of the caulking portion can be more easily performed. By applying for the 27th patent range, although there is a very small ball with an outer diameter of 0.3 mm, it is still good when using the writing. 24 312XP/invention manual (supplement)/94-05/ 94102999

1300748 The sense of writing, and even if you continue to write, you can maintain a good sense of writing at the beginning of the book, without causing paper jam or pendulum. The filling ink is consumed until the last drop. By applying for the 28th item of patents, sufficient ink effluent and good writing sensation can be obtained from the beginning of writing. By applying for the 29th item of the patent scope, even if the writing is performed obliquely during writing, the contact between the paper and the bead can be maintained, and there is no concern of flying white or writing, and the contact of the front portion of the caulking portion during writing is achieved. To the paper, the caulking portion can be appropriately deformed inward. By applying the 30th item of the patent scope, the front end of the caulking portion can be more strongly contacted with the paper at the rear end corner of the caulking portion, and the slit portion can be more easily deformed inward. With the application of the 31st patent range, although it has a very small bead with an outer diameter of 0.33, it can still get a sense of writing from the beginning of writing, and even if you continue writing, you can maintain a good sense of writing at the beginning of the book. At the same time, the paper will not be jammed or the ball will fall off and the ink will be consumed until the last drop. By applying for the third item of patent scope, sufficient ink effluent and good writing sensation can be obtained from the beginning of writing. By applying for the third paragraph of the patent scope, even if the writing is performed obliquely during writing, the contact between the paper and the bead can be maintained, and there is no concern of flying white or writing, and the contact of the front portion of the caulking portion during writing is achieved. To the paper, the caulking portion can be appropriately deformed inward. By applying for the third paragraph of the patent scope, the front end of the caulking section 312XP/invention manual (supplement)/94-05/94102999 can be written, and the outer circumference of the paper can be circulated at the beginning of the paper. When the m is not full of good writing time, the paper can be made to contact the paper at the end of the paper at the outer edge of the outer edge 25 1300748, which is more powerful than the rear end corner of the caulking portion, so that the arrogant portion can be more easily deformed inward. By applying for the 35th patent range, you can get a very thin line width handwriting without handwriting. By applying for the 36th patent range, you can get a very thin line width handwriting without handwriting. By applying for the third item of patent scope, it is possible to obtain a very thin line width handwriting without handwriting bleed and without the whitening of the handwriting.

By applying for the third item of the patent range, even if the writing is tilted on the paper, the pen does not leave the paper, the writing can be sufficiently performed, and the amount of movement of the ball axis direction for obtaining the above-mentioned extremely fine handwriting can be easily set. By applying for the ninth item of the patent scope, a very thin line width handwriting without handwriting bleed can be obtained. By applying for the 40th patent range, you can get a very thin line width handwriting without handwriting.

By applying for the 41st item of the patent scope, it is possible to obtain a very thin line width handwriting without handwriting bleed, and without the handwriting whitening condition. By applying for the fourth item of the patent range, even if the writing is inclined to the paper, the pen does not leave the paper, the writing can be sufficiently performed, and the amount of movement of the ball axis direction for obtaining the above-mentioned extremely thin handwriting can be easily set. By applying for the fourth paragraph of the patent scope, you can get a very thin line width handwriting without handwriting. By applying for the 4th item of the patent scope, it is possible to obtain a very thin line width handwriting without handwriting oozing. 26 312XP/Invention Manual (supplement)/94-05/94102999

1300748 By applying for the 45th patent range, you can get a very thin line width handwriting without handwriting and without the whitening of the handwriting. By applying for the 46th item of the patent range, even if the pen is not inclined to leave the paper, the writing can be sufficiently performed, and the amount of movement of the ball axis direction in which the above-described extremely thin handwriting is obtained can be easily determined. By applying for the 47th patent range, although it has a very small bead with an outer diameter of 0.3 mm, it can still get a good sense of writing from the beginning of writing, and even if it continues to write, it can still maintain the writing with good writing. Sense, while no paper jam or pen detachment occurs, the filling ink is consumed to the last drop. By applying for the 48th patent range, sufficient ink effluent and good writing sensation can be obtained from the beginning of writing. By applying for the 49th item of the patent scope, even if it is inclined to write, the contact between the paper and the pen can be maintained, and there is no concern that the hair is white or unable to be written, and at the time of writing, the front end of the caulking portion is divided. When the paper is touched, the caulking portion can be appropriately deformed inward. By applying for the 50th item of the patent range, the front end of the caulking portion can be more strongly contacted with the paper at the rear end corner of the caulking portion, and the more easily inserted portion can be deformed inward. By applying for the 51st patent range, you can get a very thin line width handwriting without handwriting. By applying for the 52nd item of the patent scope, you can get a very thin line width handwriting without handwriting. By applying for the fifth paragraph of the patent scope, you can get the handwriting-free etch 312XP/inventive manual (supplement)/94-05/94102999, write, the setting is not full, the paper can be produced The pen will fill the situation with the surrounding conditions, 1300748 and the handwriting of the ultra-fine lines with no handwriting. By applying the patent range No. 5, even if the writing is inclined to the paper, the pen does not leave the paper, the writing can be sufficiently performed, and the amount of movement of the ball axis direction for obtaining the above-mentioned extremely thin handwriting can be easily set. [Embodiment] A preferred embodiment for carrying out the invention will be described. The ballpoint pen tip 1 according to the embodiment of the present invention is formed of the following members: a metal body 2; a bead holder 3 formed on the inner surface of the metal body 2 near the front end; and the metal body 2 is gradually formed. The crimped portion 4 formed by deforming the tip end portion 2 1 inwardly into a circumferential shape, and the pendulum 5 rotatably held between the ball receiving receptacle 3 and the crimping portion 4 are rotatably formed. The metal body 2 is made of a cylindrical body of stainless steel (for example, Worstian iron-based stainless steel such as S U S 3 0 4 , S U S 3 0 5 or SUS321). The bead holder 3 is, for example, subjected to inward pressing deformation (pressing processing) to the side wall near the front end of the metal main body 2, or cutting the inner surface near the front end of the metal main body 2; or combining the above pressing The shape can be obtained by the above cutting process. The ball 5 is inserted into the front side of the bead holder 3, and then the front end of the tapered front end portion 2 1 of the metal main body 2 is pressed inwardly into a circumferential shape (curved processing) to form the caulking portion 4. Thereby, the ball 5 is held by rotation between the caulking portion 4 and the bead holder 3. The inner diameter of the caulking portion 4 is set to be smaller than the outer diameter A of the pen. The above-mentioned pen 5 is a very small ball with an outer diameter of less than 0.3 μm. In the present invention, the outer diameter A of the pen ball 5 is only required to be less than 0.3 mm, and the 28 312XP/invention specification (supplement)/94-05/94102999 1300748 is preferably in the range of 0.15 mm to 0.29 mm. Preferably, it is preferably in the range of 0.20 mm to 0.29 mm, and more preferably in the range of 0.25 mm to 0.28 mm. The difference A-Η値 between the inner diameter Η of the caulking portion 4 and the outer diameter A of the above-mentioned pen is set to a value larger than 0.010 mm and smaller than 0.035 mm (i.e., 0.010 mm < A - H < 0.035 mm). Preferably, the above A-Η値 is set to a value larger than O.OlOmm and smaller than 0.030 mm (i.e., 0.010 mm < A-H < 0.030 mm).

The ratio L/A of the above-mentioned ball-projection dimension L to the above-mentioned outer diameter A of the ball is set to a value larger than 0.15 and smaller than 0.30 (i.e., 0.15 < L/A < 0.30). Preferably, the value of L/A described above is set to a value greater than 0.15 and less than 0.25 (i.e., 0.15 < L/A < 0.25). The ratio B/A of the inner diameter B of the above-described ball-receiving seat 3 to the outer diameter A of the above-mentioned pen is set to be larger than 0.25, and is set to be less than 0.4 (i.e., 0·25 < Β / Α < 0.4). Preferably, the above Β/Α値 is set to be greater than 0.3 and set to be less than 0.4 (i.e., 0.3 < Β / Α < 0·4). Preferably, the ballpoint pen tip 1 is formed in a thin shape in which the long cylindrical portion 22 is connected behind the tapered front end portion 2 of the metal body 2. In the present invention, the outer diameter D of the long cylindrical portion 22 is less than 0.5 mm, and specifically, the outer diameter D of the long cylindrical portion 22 is in the range of 0.30 mm to 0.49 mm. Preferably, the outer diameter D of the long cylindrical portion 22 is in the range of 0.40 mm to 0.48 mm, and particularly the outer diameter D of the long cylindrical portion 22 is more effective in the range of 0.45 mm to 0.48 mm. In the above-described ballpoint pen tip 1, the amount C of the movement of the ball 5 held between the ball holder 3 and the caulking portion 4 is preferably set to 3/m to 18# m (best 4). //m~15//m). In the above-described ballpoint pen tip 1, when the imaginary line m extending from the outer circumference of the caulking portion 4 to the conical surface 29 312XP/invention specification (supplement)/94-05/94102999 1300748 surface 41 is drawn, it is preferable that the pen bead 5 Do not protrude beyond the above imaginary line m toward the front. In the water-based ball pen using the above-mentioned ballpoint pen tip, the ink consumption in the above writing distance of 0 m to 1 0 0 m is preferably less than 8 in g and 60 in g (not preferably 10 mg or more and 5 0). Mg is not full, especially 20 mg or more and 50 mg is not good. (Embodiment) An embodiment of the present invention will be described based on the drawings. <First Embodiment>

Fig. 1 shows a first embodiment of the ballpoint pen tip 1 of the present invention. The ballpoint pen tip 1 of the present embodiment is formed of a long cylindrical metal body 2 made of SUS 3 2 1 , and is deformed by inward pressing on the inner surface near the front end of the metal body 2 ( a plurality of (three in this case) formed by inwardly projecting the ball-receiving seat 3; the front end of the tapered front end portion 2 of the metal body 2 is deformed inwardly into a circumference a caulking portion 4 formed in a shape; and a ball 5 that is rotatably held between the pen holder housing 3 and the caulking portion 4. The above-mentioned pens 5 are two types of outer diameter A of 0. 25mm and 0. 28mm. The metal body 2 is formed from a rear end of the tapered front end portion 21 located in front of the bead housing 3 to a rear end of the metal main body 2, and a long cylindrical portion 22 having a substantially constant outer diameter is formed to form a needle. shape. When the outer diameter A of the ball 5 is 0.25 mm, the outer diameter D of the long cylindrical portion 22 is set to 0.45 mm, and when the outer diameter A of the ball 5 is 0.28 mm, the long cylindrical portion is formed. 2 2 The outer diameter D is set to 0.48 mm. Fig. 2 shows the original 30 312XP/invention specification (supplement)/94-05/94102999 1300748 sub-pen 6 of the ballpoint pen tip 1 of the embodiment shown in Fig. 1 described above. The ball pen 6 is composed of a pen holder 7 and a ball-core pen 8 housed in the pen holder 7. (Pen) The pen holder 7 is composed of a metal pen tip 7 1 , a synthetic resin tail 7 2 , and a synthetic resin tail plug 7 3 . (Pen) The above-mentioned pen tip 71 is obtained by cutting a metal material such as brass. The tip end portion of the tip end portion 7 1 is formed into a tapered shape by cutting. Further, a distal end hole is formed in the distal end of the pen tip 7 1 by cutting, and a push-out inner surface is formed on the inner surface of the pen tip 71 behind the distal end hole by a cutting process, and a pen tip behind the push-out inner surface is further formed. In the inner surface of the 71, the female thread portion is formed by cutting. (End of the pen) The above-mentioned pen tail 7 2 is obtained by injection molding of a synthetic resin. A male screw portion is formed on the outer peripheral surface of the tip end portion of the pen tail 723, and the male screw portion is detachably engaged with the female screw portion of the pen tip 71. Further, the tail plug 7 3 is press-fitted into the rear end opening portion of the above-described pen tail 72. (Atom Refill) The atomic refill 8 is composed of the pen tip 1 shown in FIG. 1 described above; the pen tip 1 is fixed to the synthetic resin support frame 82 at the front end portion; and is fixed to the front end portion of the support frame 82. And supporting the support cylinder 83 of the outer peripheral surface of the ballpoint pen tip 1; and the support frame 82 is fixed to the front end opening portion, and the rear end is an open-shaped ink receiving tube 8 1 ; (Ink accommodating tube) 31 312XP/Invention Manual (Supplement)/94-05/94102999 1300748 The above ink accommodating tube 8 1 is obtained by extrusion molding of a synthetic resin (for example, polypropylene). The ink storage tube 81 is filled with an ink 8 1 a (for example, aqueous ink); and a tracking body 8 1 b disposed at the rear end of the ink 8 1 a and advancing with the consumption of the ink 8 1 a (for example, High viscosity fluid). (Support frame) The above-described support frame 8 2 is obtained by injection molding of a synthetic resin (for example, polypropylene). The support frame 8 2 is integrally formed with a cylindrical front portion, a flange portion connected to the rear of the cylindrical front portion, and a cylindrical rear portion connected to the rear of the flange portion. The ballpoint pen tip 1 is press-fitted into the cylindrical front portion. The flange portion abuts on the front end surface of the ink containing tube 8 1 , the front end surface of the pen tail 7 2 , and the push-out inner surface of the pen tip 7 1 . The cylindrical rear portion is press-fitted into the front end opening of the ink containing tube 81. (Supporting cylinder) The metal supporting cylinder 83 is fixed to the outer peripheral surface of the cylindrical front portion of the above-mentioned support frame 8 2 . The support cylinder 83 supports the outer peripheral surface of the rear end portion of the tip end of the atomic pen tip 1 to prevent loosening of the pen tip 1 during writing. (Test Results) Tables 1 and 2 show the results of the ball drop test and the handwriting water cut test using the ball pen 6 shown in Fig. 2. Table 1 shows a sample of the ballpoint pen 1 of the structure shown in Fig. 1 in which the outer diameter A of the pen ball is 0. 2 5 mm, and five samples each having a different combination of A-Η値 and L/A値 are prepared. The results are used in the ball pen 6 shown in Fig. 2 and the test is performed. Table 2 shows the preparation of A- Η in the tip of the ballpoint pen 1 of the structure shown in Figure 1 with the outer diameter A of the ball being 0. 2 8 mm, 32 312XP/invention manual (supplement)/94-05/94102999 1300748. Each of the five samples of the combination of 値 and L / A値 was used in the ball pen 6 shown in Fig. 2 and the results of the test were performed. [Table 1]

A [mm ] A-Η [mm ] L/A Pen drop test result Handwriting water cut test result Example 1 0. 25 0. 026 0. 172 〇Δ Example 2 0. 25 0. 013 0. 238 〇 Example 3 0. 25 0.018 0. 184 〇 Δ Comparative Example 1 0. 25 0. 010 0. 296 X △ Comparative Example 2 0.25 0. 030 0.145 AX Comparative Example 3 0. 25 0. 023 0.126 - X Comparison Example 4 0. 25 0. 010 0. 192 X Δ Comparative Example 5 0. 25 0.012 0.130 - X

[Table 2]

A [mm] AH [mm] L/A Pen drop test result Handwriting water cut test result Example 1 0. 28 0. 012 0. 293 〇〇 Example 2 0. 28 0. 023 0. 220 实施 Implementation Example 3 0. 28 0. 030 0. 169 〇Δ Example 4 0. 28 0.018 0. 209 〇〇 Example 5 0. 28 0. Oil 0. 190 〇〇 Comparative Example 1 0. 28 0. 034 0. 142 - X Comparative Example 2 0. 28 0. 008 0. 246 X 〇 Comparative Example 3 0. 28 0.014 0. 128 - X (pen off test) The above-mentioned pen drop test is based on the writing angle (ie, paper 9 and The angle of the 1st axis of the tip of the ball pen is 50 degrees, and the writing load is 1 500 g (grams). The sawing movement is performed at 4 m/min while rotating with a smooth writing tester. Further, the writing paper was set to overlap five sheets of a 33 312 XP/invention manual (supplement)/94-05/94102999 1300748 mat made of a hard vinyl chloride resin sheet. The confirmation of the pen drop off is that the front end of the pen tip 1 abuts against the adhesive surface of the adhesive tape every writing distance of 200 m, and the presence or absence of the pen drop is investigated. When the evaluation result of the above-mentioned pen drop test is reached at a writing distance of 100 m, the case where no pen is peeled off is recorded as "〇", and when the pen is dropped, it is recorded as "X". In addition, the "X" in the handwriting water cut test was recorded as "-" because the pen drop test was not performed. (handwriting water test)

In the above-described handwriting water-breaking test, the ball-point pen 6 prepared as described above was confirmed by handwriting by three inspectors. The evaluation of the above-mentioned handwriting water test results is recorded as "〇" when there is no handwriting water cut, and the case where the writing angle is not extremely urinary and the handwriting is not broken is recorded as "△", when the handwriting is frequently broken The water condition is recorded as "X". 3 is a graph showing the results of Table 1. The vertical axis is L / A, and the horizontal axis is A - Η. The L / of Examples 1 to 3 of Table 1 and Comparative Example 1 to Comparative Example 5 are shown. Α値 and A - Η値, according to the black dot "·". The above description "·" below () refers to the pen drop off test result and the handwriting water cut test result corresponding to the trace, the left side is the result of the pen drop off test, and the right side is the handwriting cut test result. From the graph of Fig. 3, it is known that when A-Η値 is greater than 0 · 0 1 0 mm (ie, 0 · 0 1 0 mm < Α - Η), the ball drop will not occur. Further, it is understood from the graph of Fig. 3 that when L / Α値 is larger than 0.15 (i.e., when 0.15 < L/A), almost no handwriting water breakage occurs. 4 is a graph showing the results of Table 2, with the vertical axis being L / A and the horizontal axis being A - Η, and the L/ of Example 1 to Example 5 in Table 2 and Comparative Example 1 to Comparative Example 3 Α値 and A-Η値, according to the black dot "·". The above description "·" 34 312ΧΡ / invention manual (supplement) /94-05/94102999 1300748 The lower () inside refers to the pen drop off test result and the handwriting water cut test result corresponding to this drawing, the left side is the ball The result of the shedding test is the result of the handwriting water cut test on the right. From the graph of Fig. 4, it is known that when A-Η値 is greater than 0 · 0 1 0 mm (ie, 0 · 0 1 0 mm < A - Η), the ball drop will not occur. Further, it is understood from the graph of Fig. 4 that when L / Α値 is larger than 0.15 (i.e., when 0.15 < L / A), almost no handwriting is broken. In Tables 3 and 4, the results of the test for writing were carried out using the ball pen 6 shown in Fig. 2. Table 3 shows that in the pen tip 1 of the structure shown in Fig. 1 in which the outer diameter A of the pen ball is 0. 2 5 mm, 5 samples of different combinations of B/A値 are prepared, and these are used in Fig. 2 The results of the test were carried out in the atomic pen 6 shown. Table 4 shows that in the pen tip 1 of the structure shown in Fig. 1 in which the outer diameter A of the ball is 0·28 mm, five samples of different combinations of B/A値 are prepared, and the same is used in Fig. 2 The results of the test were carried out in the ball pen 6. [Table.3] A [mm ] A-Η [mm ] L/AB/A Pen holder seating wear [mm ] Number of writing defects is not good Example 1 0.25 0.016 0.235 0.324 0.006 0 Comparative Example 1 0.25 0.016 0.235 0. 448 0.011 1 Comparative Example 2 0.25 0.016 0.235 0.560 0.015 2 35 312XP/Invention Manual (supplement)/94-05/94102999 1300748 [Table 4] A [mm] A-Η [mm] L/AB/ A Pen holder seating wear [mm] The number of writing defects is poor. Example 1 0.28 0.018 0.235 0.329 0.003 0 Comparative Example 1 0.28 0.018 0.235 0.436 0.010 0* Comparative Example 2 0.28 0.018 0.235 0. 543 0.013 2 * : Although there was no poor writing, the handwriting was broken. (writing test)

The above-mentioned writing sputum test system uses the ink 8 1 a filled in the interior of the ink accommodating tube 8 1 as a filling amount of 0. 4 g of aqueous ink, the atomic pen 6 shown in Fig. 2, using a spiral writing writing test machine (writing angle) 70 degrees, writing load 100g, writing speed 4m / min) implementation. The wear of the ball-receiving seat of Table 3 and Table 4 was determined after writing 7000 οι by the above-mentioned writing test machine. In addition, the pen holders of Tables 3 and 4 wear the average enthalpy of each of the five branches. In addition, in Tables 3 and 4, "poor writing" means that the filling ink cannot be consumed to the last drop, and the numbers shown in Tables 3 and 4 refer to the number of writing defects in each of the five. . As shown in the results of Tables 3 and 4, the wear of the bead holder was larger (Comparative Example 1 and Comparative Example 2 of Table 3, Comparative Example 1 and Comparative Example 2 of Table 4), due to factors such as paper jam. And the writing is bad, or the handwriting is broken. On the other hand, in the case where the bead holder is less worn (Example 1 of Table 3, and Example 1 of Table 4), writing failure does not occur, and the filling ink can be consumed to the last drop. <Second Embodiment> Fig. 6 shows a second embodiment of the ballpoint pen tip 1 of the present invention. The present invention is directed to a ballpoint pen tip 1 of the example of the invention, which is formed by a member having a cylindrical SUS304 metal body 2 having a tapered front end portion 21; The inner side of the metal body 2 is formed on the inner surface of the metal body 2 by a cutting process, and the tapered front end portion 2 of the metal body 2 is deformed inwardly into a circumferential shape. a crimping portion 4; and a ball 5 that is rotatably held between the above-described ball-receiving seat 3 and the above-mentioned proud portion 4.

The tapered end portion 21 is formed on the outer surface of the front end portion of the metal main body 2, and is formed to extend rearward from the crimping portion 4 beyond the bead holder 3. In the above-described bead housing 3, a center hole 31 is disposed in the axial direction, and a plurality of (here, three) ink drainage grooves 32 radially communicating with the center hole 31 are formed. The above-mentioned pen 5 series adopts two types of outer diameter A of 0. 25 mm and 0·28 mm. Fig. 7 shows an example of a primary pen 6 using the pen tip 1 of the embodiment shown in Fig. 6 described above. The ball pen 6 is composed of a pen holder 7 and an atomic cartridge 8 housed in the pen holder 7. (Pen) The pen holder 7 is composed of a metal pen tip 71, a synthetic resin tail 7.2, and a synthetic resin tail plug 733. (Pen) The above-mentioned pen tip 7 1 is obtained by cutting a metal material such as brass. The tip end portion of the tip end portion 7 1 is formed into a tapered shape by cutting. Further, a distal end hole is formed in the distal end of the pen tip 7 1 by cutting, and a push-out inner surface is formed by cutting in the inner surface of the pen tip 7 1 behind the front end hole, and further behind the push-shaped inner surface Tip 7 1 37 312XP / Invention Manual (Repair) / 94-05/94102999 1300748 In the inner surface, the female thread portion is formed by cutting. (End of the pen) The above-mentioned pen tail 7 2 is obtained by injection molding of a synthetic resin. A male screw portion is formed on the outer peripheral surface of the tip end portion of the pen tail 723, and the male screw portion is detachably engaged with the female screw portion of the pen tip 71. Further, the tail plug 7 3 is press-fitted into the rear end opening portion of the above-described pen tail 72. (atomic refill)

The atomic pen core 8 is composed of the pen tip 1 shown in FIG. 6 described above; the pen tip 1 is fixed to the synthetic resin support frame 82 at the front end portion; and the support frame 8 2 is fixed to the front end opening portion, and The rear end is formed in an open ink storage tube 81. (Ink Storage Tube) The ink storage tube 8 1 is obtained by extrusion molding of a synthetic resin (for example, polypropylene). The ink storage tube 81 is filled with an ink 8 1 a (for example, aqueous ink); and a tracking body 8 1 b disposed at the rear end of the ink 8 1 a and advancing with the consumption of the ink 8 1 a (for example, High viscosity fluid). (Support frame) The above-described support frame 8 2 is obtained by injection molding of a synthetic resin (for example, polypropylene). The support frame 8 2 is integrally formed with a cylindrical front portion, a flange portion connected to the rear of the cylindrical front portion, and a cylindrical rear portion connected to the rear of the flange portion. The ballpoint pen tip 1 is press-fitted into the cylindrical front portion. The flange portion abuts on the front end surface of the ink containing tube 8 1 , the front end surface of the pen tail 7 2 , and the push-out inner surface of the pen tip 7 1 . The cylindrical rear portion is press-fitted into the front end opening of the ink containing tube 81. 38 312XP/Invention Manual (Supplement)/94-05/94102999 1300748 (Test Results) Table 5 and Table 6 use the ball pen 6 shown in Fig. 7 to perform the ball drop test and the handwriting water cut test.

Table 5 shows that in the pen tip 1 of the configuration shown in Fig. 6 in which the outer diameter A of the pen ball is 0 · 2 5 mm, five samples each having a different combination of A - Η値 and L / A , are prepared, and The results are used in the ball pen 6 shown in Fig. 7 and subjected to the test. Table 6 shows that in the pen tip 1 of the structure shown in Fig. 6 in which the outer diameter A of the pen ball is 0. 28 mm, five samples each having a different combination of A-Η値 and L/A値 are prepared, and The results are used in the ball pen 6 shown in Fig. 7 and subjected to the test. [Table 5] A [mm] A-Η [mm] L/A Pen drop test result Handwriting water cut test, 纟▲ table Example 1 0.25 0.015 0.216 〇〇 Example 2 0.25 0.022 0.161 〇〇 Example 3 0.25 0.015 0. 228 〇〇 Example 4 0.2 5 0.019 0.203 〇〇 Example 5 0.25 0.028 0.151 〇 △ Comparative Example 1 0. 25 0.008 0.267 X Δ

[Table 6] A [mm] A-Η [mm] L/A Pen-bee-off test & Results handwriting water-breaking test table Example 1 0.28 0.015 0.235 〇〇 Example 2 0. 28 0.027 0.154 〇Δ Example 3 0.28 0.024 0.196 〇〇Comparative Example 1 0. 28 0.008 0. 285 X 〇Comparative Example 2 0.28 0.010 0.269 X 〇Comparative Example 3 0.28 0.034 0.144 A X (needle shedding test) The above-mentioned pen drop test is based on the writing angle ( That is, the paper 9 and the ball pen 312XP / invention manual (supplement) / 94-05/94102999 39 1300748

The angle of the nib of the nib of the nib is 50 degrees, and the writing load is 150 g (g). The sawing movement is performed at 4 m/min while rotating with a smooth writing tester. Further, the writing paper was set to overlap five sheets on a mat composed of a plate made of a hard vinyl chloride resin. The confirmation of the pen drop off is that the front end of the pen tip 1 abuts against the adhesive surface of the adhesive tape every writing distance of 200 m, and the presence or absence of the pen drop is investigated. When the evaluation result of the above-mentioned pen drop test is reached at a writing distance of 100 m, the case where no pen is peeled off is recorded as "〇", and when the pen is dropped, it is recorded as "X". In addition, the "X" in the handwriting water cut test was recorded as "-" because the pen drop test was not performed. (Handwriting Water Cut Test) The above-described handwriting water cut test was performed by handwriting of three ball inspectors 6 prepared by the three inspectors. The evaluation of the above-mentioned handwriting water test results is recorded as "〇" when there is no handwriting water cut, and the case where the writing angle is not extremely urinary and the handwriting is not broken is recorded as "△", when the handwriting is frequently broken The water condition is recorded as "X". Fig. 8 is a graph showing the results of Table 5, with the vertical axis being L/A and the horizontal axis being A - Η. The L/A 値 and A of Examples 1 to 5 in Table 5 and Comparative Example 1 are shown. - Hey, look at the black point "瘫". The bottom of the above description "·" refers to the result of the pen drop test and the result of the handwriting water cut test. The left side is the result of the pen drop off test, and the right side is the result of the handwriting water cut test. From the graph of Fig. 8, it is known that when Α - Η値 is larger than O.OlOmm (i.e., when 0. 0 1 m m < A - Η), the ball off condition will not occur. Further, as is apparent from the graph of Fig. 8, when L/A 値 is larger than 0.15 (i.e., 0.15 < L / A), almost no handwriting water breakage occurs. 40 312XP/Invention Manual (supplement)/94-05/941〇2999 1300748

Fig. 9 is a graph showing the results of Table 6, with the vertical axis being L/A and the horizontal axis being A - Η. The L/ of Examples 1 to 3 of Table 6 and Comparative Example 1 to Comparative Example 3 were shown. Α値 and A - Η値, according to the black dot "·". The above description of the "call" below () refers to the pen drop off test result corresponding to the trace and the handwriting water cut test result 'left side is the result of the ball off test' and the right is the handwriting water cut test result. It can be seen from the graph of Fig. 9 that when A-Η値 is greater than 0 _ 0 1 0 m m (ie, 0 · 0 1 0 m m < A - Η), the ball drop will not occur. Further, it is understood from the graph of Fig. 9 that when L / Α値 is larger than 0.15 (i.e., when 0.15 < L/A), almost no handwriting water breakage occurs. In Tables 7 and 8, the results of the writing test were carried out using the ball pen 6 shown in Fig. 7. Table 7 shows that in the pen tip 1 of the structure shown in Fig. 6 in which the outer diameter A of the pen is 0.25 mm, five samples of B/A 値 different combinations are prepared, and the same is used for the atom shown in Fig. 7. The results after the test were carried out in the pen 6. Table 8 shows that in the pen tip 1 of the structure shown in Fig. 6 in which the outer diameter A of the ball is 0.28 mm, five samples of B/A 値 different combinations are prepared, and Φ is used as shown in Fig. 7. The results of the test were carried out in the ball pen 6. [Table 7] A [mm] A-Η [mm] L/AB/A Pen holder seating wear [mm] Number of cases where writing is poor. Example 1 0. 25 0.017 0.235 0.320 0.009 0 Comparative Example 1 0. 25 0.017 0.235 0. 444 0.015 2 Comparative Example 2 0. 25 0.017 0.235 0.564 0.027 4 41 312XP/Invention Manual (supplement)/94·05/94102999 1300748 [Table 8] A [mm] AH [mm] L /AB/A Pen bead holder wear [mm ] The number of writing defects is poor. Example 1 0. 28 0.018 0.235 0.329 0.008 0 Comparative Example 1 0. 28 0.018 0.235 0.432 0.013 1 Comparative Example 2 0. 28 0.018 0.235 0.546 0.024 3 (writing test)

The above-mentioned writing sputum test system uses the ink 8 1 a filled in the inside of the ink accommodating tube 8 1 as a filling amount of 0. 4 g of aqueous ink, the atomic pen 6 shown in Fig. 7, using a spiral writing writing test machine (book nest) The angle is 70 degrees, the writing load is 100 g, and the writing speed is 4 m/min. The wear of the ball-receiving seat of Tables 7 and 8 was measured after writing 700 mm through the above-mentioned writing test machine. In addition, the pen holders of Tables 7 and 8 wear the average enthalpy of each of the five branches. In addition, in Tables 7 and 8, the term "poor writing" means that the filling ink cannot be consumed to the last drop, and the numbers shown in Tables 7 and 8 refer to the number of writing defects in each of the five. . As shown in the results of Tables 7 and 8, the wear of the bead holder was larger (Comparative Example 1 and Comparative Example 2 of Table 7 and Comparative Example 1 and Comparative Example 2 of Table 8) were caused by paper jam or the like. The problem is that the writing is bad. On the contrary, the less wear of the bead holder (Example 1 of Table 7, Example 1 of Table 8) did not cause writing failure, and the filling ink was consumed to the last drop. <Third Embodiment> Figs. 10 to 12 show a third embodiment of the ballpoint pen tip 1 of the present invention. (Heart tip pen tip) The pen tip 1 is formed of a long cylindrical metal 42 312XP/invention specification (supplement) made of stainless steel (for example, WS321 stainless steel). 94-05/94102999 1300748 Main body 2; a beading capacity composed of a plurality of (here, three) inward projections formed by inward pressing deformation (pressing processing) on the inner surface near the front end of the metal body 2 a caulking portion 4 formed by the tip end of the tapered front end portion 2 1 of the metal body 2 and being deformed inwardly into a circumferential shape (caulking deformation); formed in the pen holder housing 3 and a ball holding hole 2 3 between the caulking portions 4; and a ball 5 that is rotatably held in the ball holding hole 2 3 . Further, the above-described bead holder 3 can also be formed by cutting the inner surface near the front end of the metal body 2.

25毫米。 The above-mentioned pen 5 is the outer diameter A is 0. 25mm. The metal body 2 is formed in a needle shape from the rear end of the tapered front end portion 21 to the rear end of the metal body 2, and the long cylindrical portion 22 is formed. When the outer diameter of the long cylindrical portion 22 is set to 0. 45 mm. The amount of movement of the ball 5 in the axial direction in the above-described ball-retaining hole 2 3 is set to 7/m. The amount L of the axial direction of the above-described ball 5 is set to be 23.5% of the outer diameter A of the ball. A conical surface 41 is formed on the outer circumferential surface of the caulking portion 4. When the imaginary line m extending forward from the conical surface 41 of the outer peripheral surface of the caulking portion 4 is drawn, the pen 5 does not protrude forward beyond the above-described state in which the ball 5 and the bead holder 3 are in contact with each other. Imaginary line m. Thereby, when writing, the outer peripheral edge of the front end of the caulking portion 4 (that is, the front end of the conical surface 41) can be more strongly contacted with the paper than the rear end corner portion of the caulking portion 4 (that is, the rear end of the conical surface 41). The inward deformation of the caulked portion 4 is easily performed. The front end wall thickness T of the caulking portion 4 is obtained from an imaginary line m extending forward from the conical surface 41 of the outer peripheral surface of the caulking portion 4 and from the front end of the caulking portion 4 43 312XP / invention manual (supplement) / 94- 05/94102999 1300748 The inner circumference is in the direction of the diameter 々L, the intersection of the imaginary line η extending outside the square b (the vertical direction of the axis), and measuring the concentric 丄~疋 the parent point ρ and the inner periphery of the front end of the caulking portion 4 The distance between them. In the present embodiment, Φ , ^ γ ', the front end wall thickness Τ of the caulking portion 4 is 6//πι. (Atom pen) Figure 2 shows the system of the ballpoint pen 1 of the ballpoint pen 1 shown in Figure 1. Further, the mast 7 and the atomic cartridge 8 structure of the above-mentioned atomic token & zero b are the same as those of the first embodiment, and therefore will not be described again. (Test results) Table 9 shows that the tip end wall thickness T of the caulking portion 4 is different in the ball pen 6 of the structure shown in Fig. 2 in which the outer diameter of the chapter is a 25 mm. Two samples, the results of the place where the writing test was performed. Further, the ink storage tube 81 of the above-described ball pen 6 is filled with a water-repellent ink of 秘 里 t. 4 g ^ The writing test described above is a writing test machine using a spiral writing (writing speed: 4 m / min, writing load) : 50g, writing angle: 70 degrees) implementation. [Table 9] Γ^- Pen bead 彳Φ A fm -~ Example comparison example just opened from #同ί < 0. 25 0. 25 初开始#Use book front wall thickness TU m) 6 30 H(mm ) The inner circumference of the front end of the caulking portion is 0. 234 0. 234 weeks, W diameter π (ππη) 0.226 0.240 C (//m) The direction of the glaze of the pen may be moved 7 7 after the end of writing. Spindle:...·ϋ"_·:Τ 7 22 Q Ο 〇/ ϋ Start 1 ,, --- Paper jam one——---- 1 U 1)3⁄4 Good 0 0/0 Poor off the ball' —- No None In the embodiment of Table 9, it is known that the inner circumference inner diameter H of the front end of the caulking portion 4 is from the beginning of writing to the end of writing (filling ink consumption 44 312 ΧΡ / invention manual (complement) Piece) /94-05/94102999 1300748

When it is exhausted, it will become smaller, and the writing will deform the caulking portion 4 inward. Further, in the embodiment of Table 9, regarding the axial direction movable amount C of the ball 5, although the pen holder housing 3 is subject to wear, there is no change from the beginning of writing to the end of writing, and the maintenance is constant. status. In the examples of Table 9, the writing feeling at the beginning of writing was good. That is, a good writing feeling can be obtained from the beginning of writing to the end of writing. In the embodiment of Table 9, the consumption of the ink 100% will be consumed in the case where no paper jam or pen drop occurs. Fig. 13 (a) shows the state in which the embodiment of the table 9 is used immediately before writing, and the embodiment of the table 9 shown in Fig. 13 (b) is in the state after writing. In the comparative example of Table 9, the inner peripheral edge inner diameter of the front end of the caulking portion 4 is only slightly increased from the beginning of use of writing to the end of writing (unable to be written due to paper jam). In the comparative example of Table 9, the axial movement amount C of the ball 5 is increased by the wear of the bead holder 3. In the comparative example of Table 9, the writing feeling at the beginning of writing was caused by hooking the paper, and the writing feeling was not good. Further, in the comparative example of Table 9, when the filling ink consumed 38%, the paper could not be written due to clogging of the paper. Fig. 14 (a) shows a state in which the comparative example of Table 9 is just before the use of writing, and Fig. 14 (b) shows the state of the comparative example of Table 9 after the writing is completed. <Fourth Embodiment> Figs. 2 and 15 show an embodiment of the aqueous ball pen 6 of the present invention. The water-based ball pen 6 of the present invention is composed of a pen holder 7 and an atomic cartridge 8 that can be exchanged in the pen holder 7. (Clip) 45 312XP/Invention Manual (Supplement)/9105/94102999 1300748 The pen holder 7 is composed of a metal pen tip 7 1 , a synthetic resin tail 7 2 , and a synthetic resin tail plug 7 3 . (written)

The above-described pen tip 71 is obtained by cutting a metal material such as brass. The tip end portion of the tip end 71 is formed into a tapered shape by cutting. Further, a distal end hole is formed in the distal end of the pen tip 7 1 by cutting, and a push-out inner surface is formed on the inner surface of the pen tip 71 behind the distal end hole by a cutting process, and a pen tip behind the push-out inner surface is further formed. In the inner surface of the 71, the female thread portion is formed by cutting. (End of the pen) The above-mentioned pen tail 7 2 is obtained by injection molding of a synthetic resin. A male screw portion is formed on the outer peripheral surface of the tip end portion of the pen tail 723, and the male screw portion is detachably engaged with the female screw portion of the pen tip 71. Further, the tail plug 73 is press-fitted into the rear end opening portion of the above-described pen tail 72. (Atom Refill) The above-mentioned atomic refill 8 is composed of a pen tip 1; the pen tip 1 is attached to a synthetic resin support frame 8 2 at the front end portion; and is fixed to the front end portion of the support frame 8 2 , and The support cylinder 83 supporting the outer peripheral surface of the tip of the atomic pen 1; and the support holder 8 2 fixed to the front end opening and having an open end of the ink storage tube 81; (Ink Storage Tube) The ink storage tube 8 1 is obtained by extrusion molding of a synthetic resin (for example, polypropylene). The ink storage tube 81 is filled with an ink 8 1 a (for example, aqueous ink); and is disposed at the rear end of the ink 8 1 a, and is accompanied by the oil 46 312XP/invention specification (supplement)/94-05/94102999 1300748 Tracking body 8 1 b (for example, high viscosity fluid) that is advanced by the consumption of ink 8 1 a. (support frame)

The support frame 8 2 is obtained by injection molding of a synthetic resin (e.g., polypropylene). The support frame 82 is integrally formed. The cylindrical front portion, the flange portion, and the cylindrical rear portion. The cylindrical front portion is pressed and fixed to the tip of the ballpoint pen 1. The flange portion is connected to the rear of the cylindrical front portion, and abuts against the front end surface of the ink containing tube 81, the front end surface of the pen tail 723, and the push-out inner surface of the pen head 71. The cylindrical rear portion is connected to the rear of the flange portion, and is press-fitted into the front end opening of the ink containing tube 81. (Heart pen tip) The above-described ballpoint pen tip 1 is formed of a long cylindrical metal body 2 made of stainless steel (for example, Wostian iron-based stainless steel such as SUS321), and the metal body 2 a bead housing 3 formed by inwardly projecting a plurality of (here, three) inwardly pressing deformations (pressing processing) on the inner surface near the front end; by tapping the metal body 2 a front end portion 2 1 front end, a caulking portion 4 formed by being deformed inwardly into a circumferential shape (curved deformation); a ball holding hole 2 3 formed between the pen holder receiving seat 3 and the caulking portion 4; The ball 5 that is rotatably held in the above-described ball holding hole 2 3 . The above-mentioned pen 5 is an outer diameter A of 0. 25 m m. The metal body 2 is formed in a needle shape from the rear end of the tapered front end portion 21 to the rear end of the metal body 2, and the long cylindrical portion 22 is formed. When the outer diameter A of the ball 5 is 0.25 m, the outer diameter of the long cylindrical portion 2 2 is set to 0 · 4 5 m m. The amount of movement of the ball 5 in the axial direction of the ball retaining hole 2 3 is set to 47 312 XP / invention manual (supplement) / 94-05 / 94102999 1300748 is 8 # m. The amount L of the axial direction of the above-described ball 5 is set to be 23.5% of the outer diameter A of the ball. The ink consumption amount of the water-based ball pen 6 of the present embodiment was measured in the interval of writing distance 0 m to 1 0 0 m, and the consumption was 4500 mg. By performing the handwriting test on the above-mentioned water-based ball pen 6, it is possible to obtain a handwriting having a very thin handwriting width (0·13 mm to 0.16 mm) without handwriting bleed or handwriting whitening. (support tube)

The metal support cylinder 83 is fixed to the outer peripheral surface of the cylindrical front portion of the support frame 82. The support cylinder 83 supports the outer peripheral surface of the rear end portion of the tip end of the atomic pen tip 1 to prevent loosening of the pen tip 1 during writing. (Test Results) In the water-based ballpoint pen 6 of the structure shown in Fig. 2 and Fig. 15 in which the outer diameter A of the ball is 0.25 mm, the amount of movement C and the amount of ink consumed in the axial direction of the ball 5 are different. Three kinds of samples (Example, Comparative Example 1, Comparative Example 2) were subjected to handwriting test results.

[Table 10] Example Comparative Example 1 Comparative Example 2 Penet outer diameter A (mm 丨) 0. 25 0· 25 0· 25 Ink consumption (in ig ) 45 65 27 Amount of movement of the ball in the axial direction C ( // m) 8 20 2 The handwriting is flying without any slight handwriting. The ink consumption is measured. The above ink consumption is measured by a spiral writing writing test machine (writing speed: 4m / min, writing Load: 50g, writing angle: 70 degrees) Enter 48 312XP / invention manual (supplement) / 94·05/94102999 1300748 line writing, and determine the ink consumption of writing distance from 0 m to 100 m. (Evaluation of Handwriting) The above-mentioned handwriting evaluation is performed by three inspectors on the water-based ballpoint pen 6 before the above-described ink consumption measurement, and it is confirmed whether or not there is "writing handwriting" and "handwriting oozing". BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1(a) is an enlarged longitudinal sectional view showing an essential part of a first embodiment of a ballpoint pen tip of the present invention, and Fig. 1(b) is a cross-sectional view taken along line X-X of the above (a).

Fig. 2 is a longitudinal sectional view showing an application example of the pen tip of the ball pen shown in Fig. 1. Figure 3 is a graph showing the results of Table 1. Figure 4 is a graph showing the results of Table 2. Fig. 5 is a magnified view showing a state in which the tip of the ballpoint pen of the present invention abuts on the paper at the time of writing. Fig. 6 (a) is an enlarged longitudinal sectional view showing an essential part of a second embodiment of the ballpoint pen tip of the present invention, and Fig. 6 (b) is a cross-sectional view taken along the line Y - Y of the above (a). Fig. 7 is a longitudinal sectional view showing an application example of the pen tip of the ball pen shown in Fig. 6. Figure 8 is a graph showing the results of Table 5. Figure 9 is a graph showing the results of Table 6. Figure 10 is a longitudinal cross-sectional view showing a third embodiment of the ballpoint pen tip of the present invention. Fig. 11 is an enlarged longitudinal sectional view of an important part of Fig. 1. Figure 12 is a cross-sectional view taken along line Z - Z of Figure 1. Fig. 13 is a longitudinal sectional view showing the tip of a ballpoint pen according to an embodiment of the present invention, wherein (a) is just before the use of the state before writing, and (b) is the state after the writing is completed. Figure 14 is a longitudinal section of the pen tip of the comparative example, (a) is just beginning to use 49 312XP / invention manual (supplement) /94-05/94102999 1300748 state before writing Figure 1 5 (a) Figure 1 5 ( b ) Department [main component 1 ball pen 2 metal 2 1 tapered 22 long cylinder

3 1 Pen buckle The bead volume Center hole 32 Ink lead, (b) The state after writing. An important part of the fourth embodiment of the present invention is an enlarged longitudinal sectional view, and a cross-sectional view taken along line W - W of (a). No. Description] The tip end part of the nib body is seated (inwardly protruding) The groove 4 The caulking part 41 Conical surface 5 Pen 6 Ball pen • 7 Pen 71 Tip 7 2 Pen tail 7 3 Tail plug 8 Ball pen 8 1 Ink Core volume tube 8 1a Ink 8 1b Tracking body 312XP / Invention manual (supplement) /94-05/94102999 50 1300748 82 Support frame 83 Support cylinder 9 The outer diameter of the radial movement of the paper

A Pen outer diameter B Pen bead holder C Pendulum axis D Long cylindrical part L Pen-bead protruding ruler Inside the cuffed part 敛 Folding part before m Imaginary line η Imaginary line P Intersection point (pencil Outer diameter in the axial direction (wall thickness at the inner end of the front end of the caulking portion)

312XP / invention manual (supplement) /94-05/94102999

Claims (1)

1300748 X. Patent application scope: 1. A ballpoint pen tip, which is attached to a pen holder on the front end of the metal body, and accommodates 0.3 mm of the ball on the front side of the pen holder. The tapered inner portion of the metal body is deformed into a circumferential shape to form a crimping portion, and the ball is rotatably held between the ball-capped slit portions, and the ball is protruded from the front end of the caulking portion to the front. When the outer diameter of the ball is set to A, the protruding size of the ball in the caulking portion from the front end of the caulking portion is set to a foot: 0. 010 mm < A-H < 0. 035 mm and 0. 1 5 < L/A < 0.30 relationship. 2. For the tip of a ballpoint pen according to item 1 of the patent application, the outer diameter A of the bead, the inner diameter of the caulking portion, and the protruding dimension L of the above-mentioned pen ball from the convergence are satisfied. · 0. 010 mm <A-H< 0. 030mm and 0. 1 5 < L / A < 0.25 relationship. 3. The pen tip of the atomic pen is attached to the bead holder at the front end of the metal body, and the ball bead of 0.3 mm is accommodated on the front side of the pen holder, by tapping the metal body 312ΧΡ/Invention Manual (Supplement)/94-05/94102999 The inner surface of the inner surface is not full, and the front end portion of the outer diameter is not fully formed, and one of the above-mentioned portions is set to Η, L, when it is full, the above-mentioned pen seam portion The front end is near the inner surface and the outer diameter is not full. 1300748 is deformed into a circumferential shape to form a crimping portion, and the ball is rotatably held between the crimping portions of the ball-receiving seat, and the ball is protruded from the front end of the crimping portion to the front, and is characterized by: When the outer diameter of the bead is set to A and the protruding dimension of the pen bead from the caulking portion is L, the relationship of 0. 15 < L/A < 0.25 is satisfied. 4. A ballpoint pen tip is formed in a pen holder in the vicinity of the front end of the metal body, and a 0.3 mm outer ball is received on the front side of the pen holder, by using the metal body The tapered front portion is deformed into a circumferential shape to form a crimping portion, and the ball is rotatably held between the crimping portions of the ball receiving portion, and the ball is protruded from the front end of the crimping portion to the front. In the case where the outer diameter of the bead is set to A, and the inner diameter of the caulking portion is satisfied, the relationship of: 0. 010 mm < A-H < 0. 035 mm is satisfied. 5. For the tip of a ballpoint pen in the first paragraph of the patent application, in which the diameter of the imaginary inscribed circle depicted by the center of the pen holder is satisfied, the relationship of B/A < 0.4 is satisfied. 6. The tip of a ballpoint pen according to claim 1, wherein the tapered front end portion of the body has a long cylindrical portion, and 312ΧΡ/invention specification (supplement)/94-05/94102999 and the above Part of the front end face is not full of the end portion and the above part is set to Η. When it is set to Β in the metal length 53 1300748, the cylindrical outer diameter D is less than 0·5 mm. 7. The tip of a ballpoint pen according to item 6 of the patent application, wherein the outer diameter A of the pen bead is 0.15 mm~0. 2 9 mm, and the outer diameter D of the long cylindrical portion is 0·30 mm to 49 mm. 〇8. The tip of the ballpoint pen according to item 7 of the patent application scope, wherein the outer diameter A of the pen ball is 0. 2 5 mm~0. 28 mm, and the outer diameter D of the long cylindrical portion is 0·40 mm to 48 mm. 〇 9. The tip of a ballpoint pen according to claim 1, wherein the inner side of the front end of the metal body is formed with a ball-receiving seat by pressing the side wall near the front end of the metal body inwardly. 10. The tip of a ballpoint pen according to claim 1, wherein the inner surface of the front end of the metal body is subjected to a cutting process, and a ball-receiving seat is formed on the inner surface of the front end of the metal body. 1 1. The tip of a ballpoint pen according to item 3 of the patent application, wherein when the diameter of the imaginary inscribed circle depicted in the center of the pen holder is set to B, it satisfies: B/A < 0 . 4 relationship. 1. The tip of a ballpoint pen according to claim 3, wherein a long cylindrical portion is provided behind the tapered front end portion of the metal body, and the outer diameter D of the long cylindrical portion is less than 0.5 mm. . 1 3. The tip of the ballpoint pen according to Item 12 of the patent application, wherein the outer diameter A of the ball is 0. 15 mm~0. 2 9 mm, and the outer diameter D of the long cylindrical portion is 0.30 mm~ 0.49mm 〇54 312XP/invention manual (supplement)/94-05/94102999 1300748 1 4 . The tip of the ballpoint pen of claim 13 of the patent application, wherein the outer diameter of the ball bead is 0. 2 5 mm~0. 28 mm, and the long cylindrical portion is 0.40 mm to 0.48 mm. 1 . The tip of a ballpoint pen according to claim 3, wherein the side wall near the front end of the metal body is pressed and deformed inward, and the inner surface of the metal body is formed with a pen holder. 16. The tip of a ballpoint pen according to item 3 of the patent application, wherein the inner surface near the front end of the metal body is subjected to cutting, and the inner surface of the metal body is formed with a pen holder. 1 7. The tip of the ballpoint pen of claim 4, wherein the diameter of the imaginary inscribed circle depicted in the center of the pen holder is satisfied: B/A <0.4. 1 8. The tip of a ballpoint pen according to item 4 of the patent application, wherein the tapered front end portion of the body is provided with a long cylindrical portion, and the outer diameter D of the long cylindrical portion is not full. Mm. 1 9 . The tip of the ballpoint pen of claim 18, wherein the outer diameter of the ball bead is 0.15 mm to 0. 29 mm, and the long cylindrical portion is 0.30 mm to 0.49 mm θ 2 0 . For example, the tip of the ballpoint pen of claim 19, wherein the outer diameter of the ball bead is 0.25 mm to 0.28 mm, and the outer length of the long cylindrical portion is 0.40 mm to 0.48 mm 〇 2 1 . The atomic pen nib of the item, wherein, 312XP/invention specification (supplement)/94-05/94102999, the above-mentioned path D is made by the method of B, and will be B in gold and above the diameter D, the above-mentioned path D is made by 55 1300748 The side wall near the front end of the metal body is pressed and deformed inward, and a ball-receiving seat is formed on the inner surface near the front end of the metal body. 2 2. The tip of a ballpoint pen according to item 4 of the patent application, wherein the inner surface of the front end of the metal body is subjected to a cutting process, and a ball-receiving seat is formed on the inner surface near the front end of the metal body. 2. The tip of the ballpoint pen according to the first aspect of the patent application, wherein the front end wall thickness of the caulking portion is set to 25/m or less, and the contact with the paper is made with writing, so that the caulking portion can be made to The structure of the inner deformation. 2 4. For the tip of the ballpoint pen of claim 23, wherein the amount of the ball that is held between the ball holder and the caulking portion is set to be 3//m~18" m. 2 5. The tip of the ballpoint pen according to item 23 of the patent application, wherein the amount of protrusion of the ball from the front end of the caulking portion toward the axial direction is less than 15% of the outer diameter of the bead. 2 6. The tip of a ballpoint pen according to item 23 of the patent application, wherein when the imaginary line extending from the conical surface of the outer peripheral surface of the caulking portion is drawn forward, the ball does not protrude forward from the imaginary line. 2 7. The tip of the ballpoint pen according to item 3 of the patent application, wherein the front end wall thickness of the caulking portion is set to be less than 2 //5 m, and the contact with the paper is made with writing, so that the caulking portion can be The structure in which the inward deformation is performed. 2 8. For the tip of the ballpoint pen of claim 27, the amount of the ball that is held between the ball holder and the caulking portion is set to 2 in the axial direction. The ballpoint pen tip of item 27, which is from the convergence of 56 312XP / invention manual (supplement) /94-05/94102999 1300748 The amount of protrusion of the front end of the slit toward the axial direction is 15% of the outer diameter of the bead The above 25% are not full. 30. The tip of a ballpoint pen according to claim 27, wherein when the imaginary line extending from the conical surface of the outer peripheral surface of the caulking portion is drawn forward, the pen ball does not protrude forward from the imaginary line. 31. The tip of a ballpoint pen according to claim 4, wherein the front end wall thickness of the caulking portion is set to 25/zm or less, and the contact between the paper and the paper is made to make the caulking portion inwardly deformable. Construction. 3 2. For the tip of the ballpoint pen of claim 31, the amount of the ball that is held between the ball holder and the caulking portion is set to be 3/m to 18/ /m. 3 3. For the tip of the ballpoint pen according to item 31 of the patent application, the amount of the ball protruding from the front end of the caulking portion toward the axial direction is less than 15% to 25% of the outer diameter of the bead. 3. The tip of the ballpoint pen according to the third aspect of the patent application, wherein when the imaginary line extending from the conical surface of the outer peripheral surface of the caulking portion is drawn forward, the ball Φ does not protrude forward from the imaginary line. 3 5. A water-based ball pen, which uses the tip of a ballpoint pen according to item 1 of the patent application, and contains water-based ink inside, and constitutes a person who can discharge the ink from the tip end of the pen tip of the above-mentioned ball pen, wherein the pen holder hole The amount of movement of the inner ball axis is 1 8 // m or less. 3 6. The water-based ballpoint pen of claim 35, wherein the ink consumption within the writing distance of 0 m to 1 0 0 m is less than 60 m g. 3 7. For example, the water-based ballpoint pen of claim 36, wherein the above 57 312XP/invention specification (supplement)/94-05/94102999 1300748 has an outer diameter of the ball bead of 0.1 mm or more and 0.3 mm. Full, and the axial direction of the ball in the above-mentioned pen holder hole can be moved by 3 // m~1 8 // m, and the writing distance is 0 m~1 Ο 油墨 πι The ink consumption is 8 mg or more 6 0 mg is not full. 3 8. The water-based ballpoint pen of claim 35, wherein the axial direction of the pen ball is less than 15% or more than 25% of the outer diameter of the ball. 3 9. A water-based ballpoint pen, which uses the original pen tip of the third application of the patent application, and contains an aqueous ink therein to form the ink which can be ejected from the front end of the pen tip of the above-mentioned atomic pen, wherein The direction of the axial direction of the ball in the pen holder hole is 1 8 // in. 4 0. The water-based ballpoint pen of claim 39, wherein the ink consumption within the writing distance of 0 m to 1 0 0 m is less than 60 m g. 4 1. The water-based ball pen of claim 40, wherein the outer diameter of the ball is 0. 1 mm or more and 0.3 mm is not full, and the axial direction of the ball in the ball holding hole is The movable amount is 3 // m~1 8 // m, and the ink consumption in the writing distance of 0 m~1 0 0 m is 8 mg or more and 60 mg is not full. 4 2. The water-based ballpoint pen of claim 39, wherein the axial direction of the pen ball is less than 15% to 25% of the outer diameter of the ball. 4 3. A water-based ball pen, which uses the tip of a ballpoint pen according to item 4 of the patent application, and contains water-based ink inside, and constitutes a person who can discharge the ink from the front end of the tip of the ball pen, wherein the pen holder hole The amount of movement of the inner direction of the ball is 1 8 // m or less. 4 4. For the water-based ballpoint pen of claim 4, wherein the ink consumption within the writing distance of 0 m to 1 0 0 m is less than 60 m g. 4 5. For example, the water-based ballpoint pen of claim 4, wherein the above 58 312XP/invention specification (supplement)/94-05/94102999 1300748 has an outer diameter of the bead of 0.1 mm or more and 0.3 mm. Full, and the axial direction of the ball in the above-mentioned pen holder hole can be moved by 3 // m~1 8 μ m, and the ink consumption in the writing distance of 0 m~1 0 0 m is 8 mg or more 6 0 Mg is not full. 4 6. The water-based ballpoint pen of claim 4, wherein the axial direction of the pen ball is less than 15% to 25% of the outer diameter of the ball. 4 7. A type of ballpoint pen tip, which is formed on the inner surface of the front end of the metal body to form a pen holder, and a ball bead having an outer diameter of less than 0.3 mm is accommodated on the front side of the pen holder. The tapered outer end surface of the metal body is deformed into a circumferential shape, and a crimping portion having a conical surface on the outer peripheral surface is formed, and the ball is rotatably held between the ball receiving seat and the crimping portion, and And a part of the bead protrudes forward from the front end of the caulking portion, wherein the thickness of the front end of the caulking portion is set to be less than 2 //5 m, and the contact with the paper during writing is made. The caulked portion can be configured to be deformed inward. 4 8. For the tip of the ballpoint pen of claim 47, the amount of the ball that is held between the pen holder and the caulking portion is set to be 4 9 in the axial direction. In the pen tip of the seventh item, the amount of protrusion of the ball from the front end of the caulking portion toward the axial direction is less than 15% or 25% of the outer diameter of the bead. 50. The tip of a ballpoint pen of claim 47, wherein when the imaginary line extending from the conical surface of the outer peripheral surface of the caulking portion is drawn forward, the ball does not protrude forward from the imaginary line. 5 1 . — A water-based ball pen with a pen holder hole 59 312XP/invention manual (supplement)/94-05/94102999 1300748 at the front end, rotatably holding the outer diameter less than 0. The tip of the ballpoint pen of the 3mm bead is filled with water-based ink inside, and the ink can be ejected from the tip end of the pen tip of the ballpoint pen, and the characteristic of the ball in the ball-retaining hole is movable in the axial direction. 1 8 // m or less. 5 2. For the water-based pen according to item 51 of the patent application, the ink consumption within the writing distance of 0 m~1 0 0 m is less than 6〇111. 5 3. The water-based ball pen according to item 52 of the patent application, wherein the outer diameter of the ball is 0. 1 mm or more and 0. 3 mm is not full, and the axial direction of the ball in the ball holding hole is The movable amount is 3//m~18//m, and the ink consumption in the writing distance of 0 m~1 0 0 m is 8 mg or more and 60 mg is not full. 5. The water-based ball pen according to claim 51, wherein the axial direction of the pen ball is less than 15% or more than 25% of the outer diameter of the ball. 312XP/Invention Manual (supplement)/94-05/94102999 60