CN1651262A

CN1651262A - Ball-pen point and water ball pen using same

Info

Publication number: CN1651262A
Application number: CNA2005100062812A
Authority: CN
Inventors: 井户干也; 山内治巳; 关根伸雄
Original assignee: Pilot Ink Co Ltd
Current assignee: Pilot Ink Co Ltd
Priority date: 2004-02-02
Filing date: 2005-02-02
Publication date: 2005-08-10
Anticipated expiration: 2025-02-02
Also published as: CN101239550A; TW200535015A; CN100421969C; KR20050078639A; CN101239550B; KR100859029B1; TWI300748B

Abstract

To obtain a ball-point pen tip capable of preventing a ball from falling down for a long period of time even though an extremely small ball is equipped, and having a sufficient writing performance without interruption of handwriting.A ball seat 3 is formed in the inner face near the tip of a metal cylinder 2. A ball 5 with an outer diameter of less than 0.3 mm is stored at the front side of the ball seat 3. A caulking part 4 is formed by deforming the tapered tip part 21 of the metal cylinder 2 inward into a circumferential shape. The ball 5 is rotatably held between the ball seat 3 and the caulking part 4. A part of the ball 5 is projected ahead of the tip of the caulking part 4. When the outer diameter of the ball 5 is A, the inner diameter of the caulking part 4 is H, and the projected dimension of the ball 5 from the tip of the caulking part 4 is L, relations of 0.010 mm<A-H<0.035 mm and 0.15<L/A<0.30 are satisfied.

Description

Ball-point pen tip and the aqueous ballpoint pen that uses this nib

Technical field

The present invention relates to a kind of ball-point pen tip (ボ one Le ペ Application チ Star プ) with minimum pearl body (being the pearl body of the not enough 0.3mm of external diameter).

Background technology

In the past, for this ball-point pen tip, a kind of ball-point pen tip is disclosed in the technical scheme 3 of patent documentation 1, it has near an end of metal thin tube, inwardly push distortion and the bearing of formation inner projection with leaving the equidistant many places of this end, and from the pearl body of the not enough 0.3mm of the diameter that inserts between an aforementioned inner projection and the aforementioned end, and the edge of an aforementioned end is by forming caulking part in inboard riveted joint processing, it is characterized in that, diameter at aforementioned pearl body is D, the inscribe diameter of a circle of aforementioned inner projection is F, be of a size of G from the stretching out of front end of the aforementioned caulking part of aforementioned pearl body, and the internal diameter of this caulking part is when being H, satisfy 0.4≤F/D≤0.6, G/D 〉=0.25, and the relation of 0.005mm≤D-H≤0.010mm.

Open communique 2003-251979 number of [patent documentation 1] Japan Patent

Usually, under the situation of the ball-point pen tip with minimum pearl body (being the pearl body of the not enough 0.3mm of external diameter), as shown in Figure 5, when writing Shi Zhuti and burying in paper, in most of the cases, caulking part also has suitable part to bury in paper.Particularly writing under the big situation of pressure, aforementioned pearl body and the bury amount of caulking part in paper are very remarkable.Therefore, the ball-point pen tip with minimum pearl body is when writing, and aforementioned caulking part is worn owing to contacting with paper, has the curable grip of caulking part to reduce, in a short time the pearl body to the outside come off may.In addition, aforementioned ball-point pen tip in the past is in order to prevent coming off of aforementioned pearl body, and the wall thickness with the front end of caulking part is set at thicker in advance.Therefore, when beginning from writing, the front end neighboring of caulking part contacts with paper, can not obtain the good sense of writing.

The structure of the ball-point pen tip of aforementioned patent document 1 is: pay attention to having or not colluding when writing to hang sense, the riveted joint deflection of caulking part is suppressed for smaller, and stretch out the ratio of size and general pearl body (for example pearl body of external diameter 0.5mm) similarly is set at bigger with respect to the pearl body of pearl body diameter.Its result, the ball-point pen tip of aforementioned patent document 1 is difficult to prevent chronically coming off of pearl body.

In addition, the ball-point pen tip of aforementioned patent document 1 is difficult to prevent fully the wearing and tearing of pearl body supporting base because that the inside overhang of pearl body supporting base is set is smaller.Therefore, owing to write, pearl body supporting base weares and teares significantly, and the axially-displaceable momentum (being the gap of caulking part and pearl body) that the pearl body grips the pearl body in the hole increases.Thus, the front end inner rim of caulking part can collude the extension paper when writing, and not only can not obtain the good sense of writing, and also may produce the foreign matters such as Soft flocks that make paper and sneak into phenomenon (hereinafter referred to as the paper plug) in the pearl body grip part.Because the generation of aforementioned paper plug, hindered the smooth and easy revolution that ink flows out property and pearl body, might produce the interrupted or filling ink of person's handwriting and remain in the possibility that can not write in the ball-point pen tip main body.

In addition, aforementioned aqueous ballpoint pen point with minimum pearl body can access the person's handwriting of thinner line width, is suitable for writing of thin portion such as notebook most.But aforementioned aqueous ballpoint pen point with minimum pearl body might produce person's handwriting and ooze profit owing to excurrent slightly different (dispersing), or produces person's handwriting skew, the person's handwriting of the thinner line width that might can't obtain suiting.

Summary of the invention

The objective of the invention is to solve aforementioned technical problem, a kind of ball-point pen tip is provided,, also can prevent coming off of pearl body chronically, and have and do not have person's handwriting sufficient writing quality intermittently although it has minimum pearl body; A kind of ball-point pen tip is provided,, also has and do not have person's handwriting sufficient writing quality intermittently although it has minimum pearl body; And a kind of ball-point pen tip is provided, although it has minimum pearl body, also can prevent coming off of pearl body chronically.

In addition, another object of the present invention is to solve aforementioned technical problem in the past, a kind of ball-point pen tip is provided, although it has the minimum pearl body of the not enough 0.3mm of external diameter, also can begin to obtain the good sense of writing from writing, write the good of beginning and write sense even continue in addition to write also can keep, and do not produce the paper plug or the pearl body comes off, the ink of filling can be used at last.

In addition, another object of the present invention is to solve aforementioned technical problem in the past, provide a kind of do not produce person's handwriting ooze profit or person's handwriting writes out the style of calligraphy characterized by hollow strokes (カスレ), can access the aqueous ballpoint pen of superfine line width.

The present inventor notices following a, b point in order to solve aforementioned technical problem.

A, the front end of ball-point pen tip (the pin type ball-point pen tip that particularly has minimum pearl body) with minimum pearl body are more sharp-pointed, as shown in Figure 5, common writing under the pressure, the size of stretching out regardless of the pearl body, apicule shape leading section with caulking part buries usually in paper more deeply, and paper is temporary transient recessed state.Therefore, be set although aforementioned pearl body stretches out size, the pearl body also can fully contact with aforementioned temporary transient recessed paper, obtains there is not intermittently good writing quality to a certain degree lessly.

B, under the situation of ball pen with minimum pearl body, since with thin portion to write (for example writing to notebook or printed book sector of breakdown) be main type of service, do not require the ball pen of pearl body (for example external diameter is the pearl body of 0.5mm) with general external diameter such write sense smoothly.

The present inventor be conceived to above some, repeatedly attentively research, finished the present invention.

(the 1st invention) the application's the 1st invention is, a kind of ball-point pen tip 1 is provided, it is formed with pearl body supporting base 3 near the inner face the front end of metal system main body 2, take in the pearl body 5 of the not enough 0.3mm of external diameter in the front side of aforementioned pearl body supporting base 3, by apicule shape leading section 21 internal modifications with aforementioned metal system main body 2 is the circle-shaped caulking part 4 that forms, between aforementioned pearl body supporting base 3 and aforementioned caulking part 4, grip pivotally pearl body 5 is arranged, and the part of pearl body 5 is forwards outstanding from the front end of aforementioned caulking part 4, it is characterized in that, external diameter at aforementioned pearl body 5 is A, the internal diameter of aforementioned caulking part 4 is H, aforementioned pearl body 5 stretches out when being of a size of L from the front end of caulking part 4, satisfies 0.010mm＜A-H＜0.035mm, and the relation of 0.15＜L/A＜0.30 (technical scheme 1).

The ball-point pen tip 1 of aforementioned techniques scheme 1 is because under the situation of the not enough 0.3mm of outer diameter A (millimeter) of pearl body 5, the value of pearl body diameter A and the poor A-H of the internal diameter H of caulking part 4 is bigger than 0.010mm (millimeter) (to be 0.010mm＜A-H), can prevent chronically that the pearl body from coming off.Because if in the value of the poor A-H of the internal diameter H of pearl body diameter A and caulking part 4 is under the situation below the 0.010mm (being under the situation of A-H≤0.010mm), the riveted joint deflection diminishes, according to the condition difference of writing use, have producing the possibility that the pearl body comes off in the short time from bringing into use.

In addition, the ball-point pen tip 1 of aforementioned techniques scheme 1 is because under the situation of the not enough 0.3mm of outer diameter A of pearl body 5, the pearl body stretches out size L and is set (promptly 0.15＜L/A) with respect to the value of the ratio L/A of pearl body diameter A than 0.15 the earth, keep the contact condition of pearl body 5 and paper 9 when writing under the pressure in common writing, and keep the suitable revolution of pearl body 5, can not produce the intermittence of person's handwriting.Because if stretching out size L at the pearl body is that when writing obliquely with respect to paper 9, pearl body 5 leaves from paper 9 under the situation of (being L/A≤0.15) below 0.15 with respect to the value of the ratio L/A of pearl body diameter A, have to produce person's handwriting possibility intermittently.

In addition, the value of the ball-point pen tip 1 of aforementioned techniques scheme 1 by pearl body diameter A and the poor A-H of the internal diameter H of caulking part 4 is littler than 0.035mm (millimeter) (to be A-H＜0.035mm), and can easily satisfy the relation of aforementioned " 0.15＜L/A ", intermittently favourable to avoiding person's handwriting.Because if under the value of aforementioned A-H is situation more than the 0.035mm, caulking part strengthens to the riveted joint deflection of inside, is difficult to obtain sufficient pearl body and stretches out size L.

In addition, the ball pen of aforementioned techniques scheme 1 is set at than 0.30 little (being L/A＜0.30) with respect to the value of the ratio L/A of pearl body diameter A by the pearl body being stretched out size L, and can guarantee the gap of caulking part 4 and pearl body 5 can when writing, obtain sufficient ink and flow out property.Because, if stretching out size L at the pearl body is more than 0.30 (promptly under 0.30≤L/A) the situation with respect to the value of the ratio L/A of pearl body diameter A, satisfy the relation that can be used in the necessary condition " 0.010mm≤A-H " that is prevented the sufficient riveted joint deflection that aforementioned pearl body comes off, caulking part 4 is streaky less with the gap of pearl body 5, its result might since when writing ink flow out deficiency and produce person's handwriting intermittence.

In the ball-point pen tip 1 of aforementioned techniques scheme 1, best 0.010mm＜A-H＜0.030mm, and 0.15＜L/A＜0.25 (technical scheme 2).

The value of the ball-point pen tip 1 of aforementioned techniques scheme 2 by making pearl body diameter A and the poor A-H of the internal diameter H of caulking part 4 than 0.030mm little (be A-H＜0.030mm), can further satisfy the relation of aforementioned " 0.15＜L/A " easily, intermittently favourable to avoiding person's handwriting.In addition, be set at than 0.25 little (being L/A＜0.25) with respect to the value of the ratio L/A of pearl body diameter A by the pearl body being stretched out size L, and can make the setting of riveted joint deflection of the caulking part that suitably grips the pearl body and function easy, further guarantee the gap of caulking part 4 and pearl body 5, can be when writing outflow property fully.

(the 2nd invention) the application's the 2nd invention is for providing a kind of ball-point pen tip 1, it is formed with pearl body supporting base 3 near the inner face the front end of metal system main body 2, take in the pearl body 5 of the not enough 0.3mm of external diameter in the front side of aforementioned pearl body supporting base 3, by apicule shape leading section 21 internal modifications with aforementioned metal system main body 2 is the circle-shaped caulking part 4 that forms, between 4 ones of aforementioned pearl body supporting base 3 and aforementioned riveted joints, grip pivotally pearl body 5 is arranged, and the part of pearl body 5 is forwards outstanding from the front end of aforementioned caulking part 4, it is characterized in that, external diameter at aforementioned pearl body 5 is A, aforementioned pearl body 5 stretches out when being of a size of L from the front end of caulking part 4, satisfies the relation (technical scheme 3) of 0.15＜L/A＜0.25.

Under the situation of the not enough 0.3mm of outer diameter A that the ball-point pen tip 1 of aforementioned techniques scheme 3 passes through at pearl body 5, the pearl body stretches out size L and is set (promptly 0.15＜L/A) with respect to the value of the ratio L/A of pearl body diameter A than 0.15 the earth, keep the contact condition of pearl body 5 and paper 9 when writing under the pressure in common writing, and keep the suitable revolution of pearl body 5, thus, can not produce the intermittence of person's handwriting.Because if stretching out size L at the pearl body is that when writing obliquely with respect to paper 9, pearl body 5 leaves from paper 9 under the situation of (being L/A≤0.15) below 0.15 with respect to the value of the ratio L/A of pearl body diameter A, have to produce person's handwriting possibility intermittently.

In addition, under the situation of the not enough 0.3mm of outer diameter A that the ball-point pen tip 1 of aforementioned techniques scheme 3 passes through at pearl body 5, the pearl body stretches out size L and is set to than 0.25 little (being L/A＜0.25) with respect to the value of the ratio L/A of pearl body diameter A, can make the setting of riveted joint deflection of the caulking part that suitably grips the pearl body and function easy, further guarantee the gap of caulking part 4 and pearl body 5, can be when writing outflow property fully.

(the 3rd invention) the application's the 3rd invention is for providing ball-point pen tip 1, it is formed with pearl body supporting base 3 near the inner face the front end of metal system main body 2, take in the pearl body 5 of the not enough 0.3mm of external diameter in the front side of aforementioned pearl body supporting base 3, by apicule shape leading section 21 internal modifications with aforementioned metal system main body 2 is the circle-shaped caulking part 4 that forms, between aforementioned pearl body supporting base 3 and aforementioned caulking part 4, grip pivotally pearl body 5 is arranged, and the part of pearl body 5 is forwards outstanding from the front end of aforementioned caulking part 4, it is characterized in that, external diameter at aforementioned pearl body 5 is A, when the internal diameter of aforementioned caulking part 4 is H, satisfy the relation (technical scheme 4) of 0.010mm＜A-H＜0.035mm.

The ball-point pen tip 1 of aforementioned techniques scheme 4 is by under the situation of the not enough 0.3mm of outer diameter A of pearl body 5, and the value of pearl body diameter A and the poor A-H of the internal diameter H of caulking part 4 (is 0.010mm＜A-H), and can prevents chronically that the pearl body from coming off than 0.010mm is big.Because if in the value of the poor A-H of the internal diameter H of pearl body diameter A and caulking part 4 is that the riveted joint deflection of (being under the situation of A-H≤0.010mm) caulking part under the situation below the 0.010mm is little, according to the condition difference of writing use, have producing the possibility that the pearl body comes off in the short time from bringing into use.

In addition, under the situation of the not enough 0.3mm of outer diameter A that the ball-point pen tip 1 of aforementioned techniques scheme 4 passes through at pearl body 5, the value of pearl body diameter A and the poor A-H of the internal diameter H of caulking part 4 is littler than 0.035mm (to be A-H＜0.035mm), even and set easily to write obliquely with respect to paper 9 and also do not have person's handwriting pearl body intermittently to stretch out size L.If that the value of A-H is 0.035mm is above (is under the situation of 0.035mm≤A-H), the riveted joint deflection of caulking part strengthens, the setting free degree that the pearl body stretches out size L reduces, and does not also have person's handwriting pearl body intermittently to stretch out size L even be difficult to set write obliquely with respect to paper 9.The value of aforementioned A-H (is A-H＜0.030mm), even also do not have person's handwriting pearl body intermittently to stretch out on the size L this point useful for further setting easily to write obliquely with respect to paper 9 less than 0.030mm.

The ball-point pen tip 1 of aforementioned techniques scheme 1 to 4 is characterized in that, when the diameter of the imaginary inscribed circle of drawing at the center of aforementioned pearl body supporting base 3 is B, satisfies the relation (technical scheme 5) of B/A＜0.4.

Diameter B (hereinafter referred to as the internal diameter B of pearl body supporting base) by the imaginary inscribed circle that will draw at the center of aforementioned pearl body supporting base 3 is set at less than 0.4 (being B/A＜0.4) with respect to the value of the ratio B/A of the outer diameter A of pearl body, and can fully suppress the abrasion of pearl body supporting base.Avoid thus by what the paper plug produced and write bad (person's handwriting intermittently maybe can not be write), obtain long-term writing property smoothly and good write sense.In addition, the value of best aforementioned B/A is greater than 0.25 (promptly 0.25＜B/A).If the value of B/A is below 0.25, because the internal diameter B of pearl body supporting base 3 is minimum, the difficulty that goes up change is made in being formed on of pearl body supporting base 3.(promptly 0.3＜B/A) is more effective greater than 0.3 for the value of aforementioned B/A.

In the ball-point pen tip 1 of aforementioned techniques scheme 1 to 5, the rear that is preferably in the apicule shape leading section 21 of metal system main body 2 has straight cylindrical portion 22, and the outer diameter D of aforementioned straight cylindrical portion 22 is that not enough 0.5mm (is D＜0.5mm) (technical scheme 6).

By under the situation of the not enough 0.5mm of outer diameter D (millimeter) of aforementioned straight cylindrical portion 22, as shown in Figure 5, the leading section of ball-point pen tip 1 becomes sharp-pointed as needle-like, caulking part 4 easier burying in paper 9 when writing, owing to, have producing the possibility that the pearl body comes off in the short time from bringing into use with the abrasion that contact the caulking part 4 that produces of paper 9.But the structure of aforementioned techniques scheme 1 to 5 acts on effectively in the ball-point pen tip 1 of technical scheme 6, can prevent fully chronically that the pearl body from coming off.That is,, can access the ball-point pen tip 1 of minimum pearl body with the pin type that can prevent chronically that the pearl body from coming off according to technical scheme 6.In addition, aforementioned straight-tube shape portion 22 connects the rear more, rear end that is arranged on apicule shape leading section 21, at least be formed at rear end from apicule shape leading section 21 near pearl body supporting base 3. certainly, aforementioned straight-tube shape portion 22 also can be formed at from the rear end of apicule shape leading section 21 to the rear end of metal system main body 2.By aforementioned cylindric 22, obtain the ball-point pen tip that front end is the aciculiform shape.

In the ball-point pen tip 1 of aforementioned techniques scheme 6, the outer diameter A of best aforementioned pearl body 5 is 0.1 5mm～0.29mm, and the outer diameter D of aforementioned straight cylindrical portion 22 is 0.30mm～0.49mm (technical scheme 7).

In the ball-point pen tip 1 of aforementioned techniques scheme 7, the outer diameter A of best aforementioned pearl body 5 is 0.25mm～0.28mm, and the outer diameter D of aforementioned straight cylindrical portion 22 is 0.40mm～0.48mm (technical scheme 8).

In the ball-point pen tip 1 of aforementioned techniques scheme 1 to 8, preferably be out of shape, and near the inner face the front end of metal system main body, be formed with pearl body supporting base 3 (technical scheme 9) by near the sidewall the front end of metal system main body 2 is pushed to inside.Thus, can easily obtain having the pin type ball-point pen tip of minimum pearl body.

In the ball-point pen tip 1 of aforementioned techniques scheme 1 to 8,, and near the inner face the front end of metal system main body 2, be formed with pearl body supporting base 3 (technical scheme 10) preferably by near the inner face the front end of metal system main body 2 is carried out machining.Thus, can easily obtain having the cutting type ball-point pen tip of minimum pearl body.

In addition, in the present invention, the outer diameter A of aforementioned pearl body 5 is the diameter of pearl body 5.In the present invention, aforementioned pearl body stretches out size L under pearl body 5 and pearl body supporting base 3 state of contact, the length that pearl body 5 is given prominence to axial the place ahead from the front end of caulking part 4.In the present invention, the internal diameter H of aforementioned caulking part 4 is the internal diameter of the ledge in circle-shaped ground on the inner radial of the inner face of caulking part 4.

(the 4th invention) in addition, the present inventor finds, although be the ball-point pen tip with minimum pearl body of the not enough 0.3mm of external diameter, by making caulking part energetically to internal modification by writing, even the abrasion of pearl body supporting base also can suppress the increase that the pearl body grips the axially-displaceable momentum of the pearl body in the hole.

Promptly, the application's the 4th invention is for providing ball-point pen tip, it is formed with pearl body supporting base 3 near the inner face the front end of metal system main body, take in the pearl body 5 of the not enough 0.3mm of external diameter (millimeter) in the front side of aforementioned pearl body supporting base 3, the outer peripheral face internal modification of the apicule shape leading section 21 by making aforementioned metal system main body is circle-shaped, and be formed on the caulking part 4 that has taper seat 41 on the outer peripheral face, between aforementioned pearl body supporting base 3 and aforementioned caulking part 4, grip pivotally pearl body 5 is arranged, the part of pearl body 5 is forwards outstanding from the front end of aforementioned caulking part 4, its main points are, its structure is that the wall thickness T of the front end of aforementioned caulking part 4 is set to below the 25 μ m (micron), can make caulking part internal modification (technical scheme 47) with contacting of paper when writing.

By aforementioned structure (technical scheme 47), even pearl body supporting base 3 abrasion, also can make caulking part 4 to internal modification with contacting of paper when writing, the internal diameter of the front-end edge portion of caulking part 4 diminishes, and therefore can suppress the increase of the axially-displaceable momentum C of pearl body 5.Its result can keep and write the good of when beginning and write sense, and can not produce the paper plug and the pearl body comes off, filling ink can be used last till.

The scope of the wall thickness T of the front end of aforementioned caulking part 4 is 1 μ m～25 μ m effectively (being preferably 1 μ m～15 μ m).If the wall thickness T deficiency of the front end of aforementioned caulking part 41 μ m, the caulking part 4 that forms suitable shape is difficult on making.On the other hand, wall thickness T at the front end of aforementioned caulking part 4 surpasses under the situation of 25 μ m, the front end neighboring of caulking part 4 contacts strongly with paper, have can not obtain from write when beginning good write sense, and can not when continuing to write, follow the abrasion of pearl body supporting base 3 by obtaining the sufficient internal modification of caulking part 4 with contacting of paper, the axially-displaceable momentum C of pearl body 5 increases, and the possibility that produces the paper plug is arranged.

In addition, the wall thickness T of the front end of aforementioned caulking part 4 as shown in Figure 2, be the intersection point P of the imaginary line n that obtains the imaginary line m that forwards prolongs from the taper seat 41 of the outer peripheral face of caulking part 4 and prolong from the front end inner rim radius vector direction foreign side of caulking part 4, the distance of the front end inner rim of mensuration this intersection point P and caulking part 4 before writing beginning.Thus, even the front end neighboring of caulking part 4 is curved surface shape (a R shape), also can determine the wall thickness T of the front end of caulking part 4.In addition, the outer diameter A of pearl body 5 of the present invention is that 0.1mm is above and not enough 0.3mm (being preferably the scope of 0.1mm～0.29mm, more preferably the scope of 0.2mm～0.29mm) is more effective.

In addition, in the ball-point pen tip 1 of aforementioned structure (technical scheme 47), the axially-displaceable momentum C that preferably is held in the pearl body 5 between pearl body supporting base 3 and the caulking part 4 is set to 3 μ m～18 μ m (being preferably 4 μ m～15 μ m) (technical scheme 48).

According to the ball-point pen tip 1 of aforementioned structure (technical scheme 48), can begin to obtain sufficient ink and flow out property and good write sense from writing.If under the situation of the axially-displaceable momentum C of pearl body 5 less than 3 μ m, ink outflow property is insufficient, might produce person's handwriting and write out the style of calligraphy characterized by hollow strokes.On the other hand, surpass under the situation of 18 μ m at the axially-displaceable momentum C of pearl body 5, the front end inner rim of caulking part 4 scratches paper when writing, and can not be write sense smoothly, and, in the short time of writing beginning, producing the paper plug easily.In addition, the axial removable amount C of the pearl body 5 of aforementioned techniques scheme 2 measures before writing beginning.

In the ball-point pen tip 1 of aforementioned structure (technical scheme 47), preferably from the front end of caulking part 4 to the pearl body 5 overhang L in axial the place ahead be pearl body diameter A more than 15% and less than 25% (technical scheme 49).

Ball-point pen tip 1 according to aforementioned structure (technical scheme 49), even write obliquely with respect to paper when writing, also can keep contacting of paper and pearl body 5, can not produce person's handwriting and write out the possibility that the style of calligraphy characterized by hollow strokes maybe can't be write, and, the front end of caulking part 4 contacts fully with paper when writing, and can produce the suitable internal modification of caulking part 4.

If under 15% the situation of the not enough pearl body diameter of the overhang L of aforementioned pearl body 5 A, when writing, when writing obliquely with respect to paper, only caulking part 4 contacts with paper, pearl body 5 leaves from paper, has and can not write or produce the possibility that person's handwriting writes out the style of calligraphy characterized by hollow strokes.On the other hand, surpass at the overhang L of aforementioned pearl body 5 under 25% the situation of pearl body diameter A, when writing, only pearl body 5 contact with paper, has to produce possible by with the suitable internal modification of the caulking part 4 that contacts generation of paper.In addition, the overhang L of the pearl body 5 of aforementioned techniques scheme 47 measures before pen is write beginning.

In the ball-point pen tip 1 of aforementioned structure (technical scheme 47), be preferably in when having drawn from imaginary line m that the taper seat 41 of the outer peripheral face of caulking part 4 forwards prolongs, pearl body 5 is unlike aforementioned imaginary line more outstanding (technical scheme 50).

According to the ball-point pen tip 1 of aforementioned structure (technical scheme 50), the front end neighboring that can make caulking part 4 contacts with paper more strongly than the back vertex angle part of caulking part 4, and the internal modification of caulking part 4 is more prone to.

(the 5th invention) the application the 5th invention is for providing a kind of aqueous ballpoint pen 6, its pearl body at front end grips has the ball-point pen tip 1 that grips the pearl body 5 that the not enough 0.3mm of external diameter (millimeter) is arranged pivotally in the hole 23, taken in water-base ink 81a in inside, front end by aforementioned ball-point pen tip 1 can be discharged aforementioned ink, it is characterized in that the axially-displaceable momentum C that aforementioned pearl body grips the pearl body 5 in the hole 23 is 18 μ m (micron) following (preferably 15 μ m are following) (technical schemes 51).

The aqueous ballpoint pen 6 of aforementioned techniques scheme 51 is 18 μ m (it is following to be preferably 15 μ m) by the axially-displaceable momentum C that aforementioned pearl body grips the pearl body 5 in the hole 23, and can suppress to flow out from the surplus of the ink of the front end of ball-point pen tip 1, can access and not produce the person's handwriting that person's handwriting oozes the superfine live width of profit.Surpass 18 μ m if aforementioned pearl body is held the axial removable amount C that holds the pearl body 5 in the hole 23, ink flows out from the front end of refill for ball-point pen 1 is superfluous, produces to write and oozes profit, can not obtain having the person's handwriting of superfine live width.

In addition, the axially-displaceable momentum C of aforementioned pearl body 5 is preferably in more than the 3 μ m, thus, can access sufficient ink outflow property, does not produce the possibility that person's handwriting writes out the style of calligraphy characterized by hollow strokes.Moreover the axially-displaceable momentum of aforementioned pearl body 5 is preferably in the following scope of the above 15 μ m of 4 μ m.Thus, can prevent further that person's handwriting from oozing profit, and prevent that person's handwriting from writing out the style of calligraphy characterized by hollow strokes, obtain having the person's handwriting of appropriate superfine live width.

In the aqueous ballpoint pen of aforementioned techniques scheme 51, preferably the exhausted amount of ink of Writing distance 0m～100m is not enough 60mg (milligram) (best not enough 50mg) (technical scheme 52).

The exhausted amount of ink of aforementioned Writing distance 0m～100m is not enough 60mg (best not enough 50mg), can suppress flowing out of ink thus superfluously, is not produced the person's handwriting with superfine live width that person's handwriting oozes profit.If under the exhausted amount of ink of aforementioned Writing distance 0m～100m was situation more than the 60mg, ink flowed out from the front end of ball-point pen tip 1, produces person's handwriting and oozes profit, can not obtain the person's handwriting of superfine live width superfluously.In addition, for prevent ink flow out not enough, do not produce person's handwriting and write out aspect the style of calligraphy characterized by hollow strokes, the exhausted amount of ink of aforementioned Writing distance 0m～100m is preferably in 8mg above (preferably more than the 10mg).The exhausted amount of ink that is aforementioned Writing distance 0m～100m be the above and not enough 60mg of 8mg (the best above and not enough 50mg of 10mg, more preferably 20mg and not enough 50mg) effectively.Because the exhausted amount of ink of aforementioned range, can further obtain not having person's handwriting to ooze profit and do not have person's handwriting to write out the person's handwriting style of calligraphy characterized by hollow strokes, that have superfine live width.

In the aqueous ballpoint pen 6 of aforementioned techniques scheme 52, the external diameter of best aforementioned pearl body 5 is the above and not enough 0.3mm of 0.1mm (preferably 0.1mm～0.29mm, 0.2mm～0.29mm) more preferably, the axially-displaceable momentum that aforementioned pearl body grips the pearl body 5 in the hole 32 is 3 μ m～18 μ m (best 4 μ m～15 μ m), and the exhausted amount of ink of Writing distance 0m～100m is the above and not enough 60mg of 8mg (preferably 10mmg above and not enough 50mg) (technical scheme 53).

According to the aqueous ballpoint pen 6 of aforementioned techniques scheme 53, can further obtain not having person's handwriting ooze the profit and do not have person's handwriting to write out the person's handwriting style of calligraphy characterized by hollow strokes, that have superfine live width.

In the aqueous ballpoint pen 6 of aforementioned techniques scheme 51, the axial overhang L of best aforementioned pearl body 5 be the pearl body external diameter more than 15% and less than 25% (technical scheme 54).

According to aforementioned techniques scheme 54, even tiltedly write with respect to paper, pearl body 5 does not leave from paper yet, can write fully, and can easily set the suitable axially-displaceable momentum C of the pearl body 5 of the person's handwriting that is used to obtain to have aforementioned superfine live width.If, under 15% situation of the external diameter of the not enough pearl body 5 of the axial overhang L of aforementioned pearl body 5, with respect to paper obliquely book and the time, pearl body 5 leaves and can not write from paper, might produce person's handwriting and write out the style of calligraphy characterized by hollow strokes.In addition, surpass at the axial overhang L of pearl body 5 under 25% the situation of external diameter of pearl body 5, in order to guarantee suitable pearl body curable grip, pearl body 5 diminishes easily with the gap that the pearl body grips the caulking part 4 in hole 23, is difficult to suitably set the axially-displaceable momentum C that aforementioned pearl body grips the pearl body 5 in the hole 32.

The present invention has following effect.

According to technical scheme 1, have minimum pearl body though can access, can prevent coming off of pearl body chronically, and possess the ball-point pen tip that does not have person's handwriting abundant writing quality intermittently.

According to technical scheme 2, have minimum pearl body though can access, can prevent coming off of pearl body chronically, possess the ball-point pen tip that does not have person's handwriting abundant writing quality intermittently more.

According to technical scheme 3, have minimum pearl body though can access, possess the ball-point pen tip that does not have person's handwriting abundant writing quality intermittently.

According to technical scheme 4, have minimum pearl body though can access, can prevent the ball-point pen tip that the pearl body comes off chronically.

According to technical scheme 5, can suppress the abrasion of pearl body supporting base fully, avoid by writing of producing of paper plug badly, obtain ink smoothly for a long time and flow out property and good write sense.

According to technical scheme 6, can access the ball-point pen tip of the pin type of effect with aforementioned techniques scheme 1.

According to technical scheme 7, can obtain having the ball-point pen tip of pin type of the effect of aforementioned techniques scheme 1 reliably.

According to technical scheme 8, can further obtain having the ball-point pen tip of pin type of the effect of aforementioned techniques scheme 1 reliably.

According to technical scheme 9, can easily obtain having the ball-point pen tip of the pin type of minimum pearl body.

According to technical scheme 10, can easily obtain having the ball-point pen tip of the cutting type of minimum pearl body.

According to technical scheme 11, can suppress the abrasion of pearl body supporting base fully, avoid by writing of producing of paper plug badly, obtain ink smoothly for a long time and flow out property and good write sense.

According to technical scheme 12, can access the ball-point pen tip of the pin type of effect with aforementioned techniques scheme 3.

According to technical scheme 13, can obtain having the ball-point pen tip of pin type of the effect of aforementioned techniques scheme 3 reliably.

According to technical scheme 14, can further obtain having the ball-point pen tip of pin type of the effect of aforementioned techniques scheme 3 reliably.

According to technical scheme 15, can easily obtain having the ball-point pen tip of the pin type of minimum pearl body.

According to technical scheme 16, can easily obtain having the ball-point pen tip of the cutting type of minimum pearl body.

According to technical scheme 17, can suppress the abrasion of pearl body supporting base fully, avoid by writing of producing of paper plug badly, obtain ink smoothly for a long time and flow out property and good write sense.

According to technical scheme 18, can access the ball-point pen tip of the pin type of effect with aforementioned techniques scheme 4.

According to technical scheme 19, can obtain having the ball-point pen tip of pin type of the effect of aforementioned techniques scheme 4 reliably.

According to technical scheme 20, can further obtain having the ball-point pen tip of pin type of the effect of aforementioned techniques scheme 4 reliably.

According to technical scheme 21, can easily obtain having the ball-point pen tip of the pin type of minimum pearl body.

According to technical scheme 22, can easily obtain having the ball-point pen tip of the cutting type of minimum pearl body.

According to technical scheme 23, although have the minimum pearl body of the not enough 0.3mm of external diameter, also can obtain the good sense of writing when beginning from writing, even and continue to write and also can keep write beginning good and write sense, and do not produce the paper plug or the pearl body comes off, filling ink can be used at last.

According to technical scheme 24, can access and begin sufficient ink from book and flow out property and good write sense.

According to technical scheme 25, even when writing, write obliquely, also can keep contacting of paper and pearl body with respect to paper, do not produce person's handwriting and write out the possibility that the style of calligraphy characterized by hollow strokes maybe can't be write.And the front end of pearl body contacts fully with paper when writing, and can carry out the suitable internal modification of caulking part.

According to technical scheme 26, the front end neighboring that can make caulking part contacts with paper more strongly than the back vertex angle part of caulking part, makes the internal modification of caulking part easier.

According to technical scheme 27, although have the minimum pearl body of the not enough 0.3mm of external diameter, also can begin to obtain the good sense of writing writing, also can keep write beginning good and write sense even continue in addition to write, and do not produce the paper plug or the pearl body comes off, filling ink can be used at last.

According to technical scheme 28, can the time obtain sufficient ink and flow out property and good write sense from writing beginning.

According to technical scheme 29, even when writing, write obliquely, also can keep contacting of paper and pearl body with respect to paper, do not produce person's handwriting and write out the possibility that the style of calligraphy characterized by hollow strokes maybe can't be write.And the front end of pearl body contacts fully with paper when writing, and can carry out the suitable internal modification of caulking part.

According to technical scheme 30, the front end neighboring that can make caulking part contacts with paper more strongly than the back vertex angle part of caulking part, makes the internal modification of caulking part easier.

According to technical scheme 31, although have the minimum pearl body of the not enough 0.3mm of external diameter, also can begin to obtain the good sense of writing from writing, also can keep write beginning good and write sense even continue in addition to write, and do not produce the paper plug or the pearl body comes off, filling ink can be used at last.

According to technical scheme 32, can the time obtain sufficient ink and flow out property and good write sense from writing beginning.

According to technical scheme 33, even when writing, write obliquely, also can keep contacting of paper and pearl body with respect to paper, do not produce person's handwriting and write out the possibility that the style of calligraphy characterized by hollow strokes maybe can't be write.And the front end of pearl body contacts fully with paper when writing, and can carry out the suitable internal modification of caulking part.

According to technical scheme 34, the front end neighboring that can make caulking part contacts with paper more strongly than the back vertex angle part of caulking part, makes the internal modification of caulking part easier.

According to technical scheme 35, can access does not have person's handwriting to ooze the person's handwriting of the superfine live width of profit.

According to technical scheme 36, can further obtain not having person's handwriting to ooze the person's handwriting of the superfine live width of profit.

According to technical scheme 37, can access do not have person's handwriting ooze the profit and do not have person's handwriting to write out the person's handwriting of the superfine live width of the style of calligraphy characterized by hollow strokes.

According to technical scheme 38, even write obliquely with respect to paper, the pearl body can not leave from paper yet, can write fully, and can easily set the axially-displaceable momentum of the pearl body that is used to obtain aforementioned superfine person's handwriting.

According to technical scheme 39, can access does not have person's handwriting to ooze the person's handwriting of the superfine live width of profit.

According to technical scheme 40, can further obtain not having person's handwriting to ooze the person's handwriting of the superfine live width of profit.

According to technical scheme 41, can access do not have person's handwriting ooze the profit and do not have person's handwriting to write out the person's handwriting of the superfine live width of the style of calligraphy characterized by hollow strokes.

According to technical scheme 42, even write obliquely with respect to paper, the pearl body can not leave from paper yet, can write fully, and can easily set the axially-displaceable momentum of the pearl body that is used to obtain aforementioned superfine person's handwriting.

According to technical scheme 43, can access does not have person's handwriting to ooze the person's handwriting of the superfine live width of profit.

According to technical scheme 44, can further obtain not having person's handwriting to ooze the person's handwriting of the superfine live width of profit.

According to technical scheme 45, can access do not have person's handwriting ooze the profit and do not have person's handwriting to write out the person's handwriting of the superfine live width of the style of calligraphy characterized by hollow strokes.

According to technical scheme 46, even write obliquely with respect to paper, the pearl body can not leave from paper yet, can write fully, and can easily set the axially-displaceable momentum of the pearl body that is used to obtain aforementioned superfine person's handwriting.

According to technical scheme 47, although have the minimum pearl body of the not enough 0.3mm of external diameter, also can obtain the good sense of writing when beginning from writing, also can keep write beginning good and write sense even continue in addition to write, and do not produce the paper plug or the pearl body comes off, filling ink can be used at last.

According to technical scheme 48, can the time obtain sufficient ink and flow out property and good write sense from writing beginning.

According to technical scheme 49, even when writing, write obliquely, also can keep contacting of paper and pearl body with respect to paper, do not produce person's handwriting and write out the possibility that the style of calligraphy characterized by hollow strokes maybe can't be write.And the front end of pearl body contacts fully with paper when writing, and can carry out the suitable internal modification of caulking part.

According to technical scheme 50, the front end neighboring that can make caulking part contacts with paper more strongly than the back vertex angle part of caulking part, makes the internal modification of caulking part easier.

According to technical scheme 51, can access does not have person's handwriting to ooze the person's handwriting of the superfine live width of profit.

According to technical scheme 52, can further obtain not having person's handwriting to ooze the person's handwriting of the superfine live width of profit.

According to technical scheme 53, can access do not have person's handwriting ooze the profit and do not have person's handwriting to write out the person's handwriting of the superfine live width of the style of calligraphy characterized by hollow strokes.

According to technical scheme 54, even write obliquely with respect to paper, the pearl body can not leave from paper yet, can write fully, and can easily set the axially-displaceable momentum of the pearl body that is used to obtain aforementioned superfine person's handwriting.

Description of drawings

Fig. 1 (a) (b) is the X-X line profile of aforementioned (a) for the amplification profilograph of the major part of the 1st embodiment of ball-point pen tip of the present invention.

Fig. 2 is the profilograph of suitable example of the ball-point pen tip of presentation graphs 1.

Fig. 3 is the result's of expression table 1 chart.

Fig. 4 is the result's of expression table 2 chart.

The ball-point pen tip of the present invention when Fig. 5 writes for expression and the enlarged drawing of paper contact condition.

Fig. 6 (a) (b) is the Y-Y line profile of aforementioned (a) for the amplification profilograph of the major part of the 2nd embodiment of expression ball-point pen tip of the present invention.

Fig. 7 is the profilograph of suitable example of the ball-point pen tip of presentation graphs 6.

Fig. 8 is the result's of expression table 5 chart.

Fig. 9 is the result's of expression table 6 chart

Figure 10 is the profilograph of the 3rd embodiment of expression ball-point pen tip of the present invention.

Figure 11 is the amplification profilograph of the major part of Fig. 1.

Figure 12 is the Z-Z line profile of Fig. 1.

Figure 13 is the profilograph of the ball-point pen tip of expression embodiments of the invention, before (a) beginning is write in expression, after (b) end is write in expression.

Figure 14 is the profilograph of the ball-point pen tip of expression comparative example, before (a) beginning is write in expression, after (b) end is write in expression.

Figure 15 (a) (b) is the W-W line profile of aforementioned (a) for the amplification profilograph of the major part of expression the 4th embodiment of the present invention.

The specific embodiment

The following describes and be used to implement preferred embodiment of the present invention.

The ball-point pen tip 1 of present embodiment comprises metal system main body 2, be formed at pearl body supporting base 3 near the inner face the front end of this metal system main body 2, be the circle-shaped caulking part that forms 4, be formed at the pearl body 5 that is held pivotally between aforementioned pearl body supporting base 3 and the aforementioned caulking part 4 by the front end internal modification with the apicule shape leading section 21 of aforementioned metal system main body 2.

Aforementioned metal system main body 2 is made of the cylinder of stainless steel (for example austenite stainless steels such as SUS304, SUS305, SUS321).

Aforementioned pearl body supporting base 3 for example by with near the sidewall the front end of metal system main body 2 to inside pushing distortion (punch process), the combination of near the inner face machining the front end of metal system main body 2 or aforementioned pushing distortion and aforementioned machining is obtained.

By the front side that pearl body 5 is inserted aforementioned pearl body supporting base 3, after this front end with the apicule shape leading section 21 of metal system main body 2 is the circle-shaped caulking part 4 that forms to inside pushing distortion (riveted joint processing).Thus, pearl body 5 is held between aforementioned caulking part 4 and the aforementioned pearl body supporting base 3 pivotally.The internal diameter H of aforementioned caulking part 4 is set to littler than pearl body diameter A.

Aforementioned pearl body 5 is suitable for the minimum pearl body of the not enough 0.3mm of outer diameter A.In the present invention, the outer diameter A of aforementioned pearl body 5 can not enough 0.3mm, but the scope of 0.15mm～0.29mm preferably is the scope of 0.20mm～0.29mm better, is better more effective in the scope of 0.25mm～0.28mm.

The value of the poor A-H of the internal diameter H of aforementioned caulking part 4 and aforementioned pearl body diameter A is set to greater than 0.010mm and less than the value of 0.035mm (that is 0.010mm＜A-H＜0.035mm).Preferably, the value of aforementioned A-H is set to greater than 0.010mm and less than the value of 0.030mm (that is 0.010mm＜A-H＜0.030mm).

The size that aforementioned pearl body stretches out the aforementioned relatively pearl body diameter of size L A is set to greater than 0.15 and less than 0.30 value (that is 0.15＜L/A＜0.30) than the value of L/A.Preferably, the value of aforementioned L/A is set to greater than 0.15 and less than 0.25 value (that is 0.15＜L/A＜0.25).

The size of the aforementioned relatively pearl body diameter of the internal diameter B A of aforementioned pearl body supporting base 3 is set to greater than 0.25 and less than 0.4 value (that is 0.25＜B/A＜0.4) than the value of B/A.Preferably, the value of aforementioned B/A is set to greater than 0.3 and less than 0.4 value (that is 0.3＜B/A＜0.4).

Aforementioned ball-point pen tip 1 preferably is connected with the pin type ball-point pen tip of straight-tube shape portion 22 at the rear of the apicule shape leading section 21 of metal system main body 2.In the present invention, the outer diameter D of aforementioned straight cylindrical portion 22 is less than 0.5mm, be specially, the outer diameter D of aforementioned straight cylindrical portion 22 is 0.30mm～0.49mm, preferably, the outer diameter D of aforementioned straight cylindrical portion 22 is 0.40mm～0.48mm, is more preferably, and the outer diameter D of aforementioned straight cylindrical portion 22 is that the scope of 0.45mm～0.48mm is more effective.

In aforementioned ball-point pen tip 1, the pearl body 5 that is held between pearl body supporting base 3 and the caulking part 4 preferably is set at 3 μ m～18 μ m (preferably 4 μ m～15 μ m) at axial removable amount C.

In aforementioned ball-point pen tip 1, when having drawn from illusion line m that the taper seat 41 of the outer peripheral face of caulking part 4 forwards prolongs, preferably pearl body 5 is forwards outstanding from aforementioned illusion line m.

Use in the aqueous ballpoint pen point of aforementioned ball-point pen tip, the exhausted amount of ink of aforementioned Writing distance 0m～100m is preferably the above but not enough 60mg of 8mg (being preferably the above but not enough 50mg of 10mg is better, the above but not enough 50mg of 20mg).

With reference to the accompanying drawings embodiments of the invention are described.

(the 1st embodiment)

Fig. 1 illustrates the 1st embodiment of ball-point pen tip 1 of the present invention.The ball-point pen tip 1 of present embodiment comprises: the metal system main body 2 of the straight cylindrical that constitutes with SUS321; Comprise pearl body supporting base 3 by a plurality of (is 3 at this) inner projection near the inner face of the front end that is formed at this metal system main body 2 to the pushing of inside distortion (punch process); By the front end internal modification with the apicule shape leading section 21 of aforementioned metal system main body 2 is the circle-shaped caulking part that forms 4; Be held in the pearl body 5 between aforementioned pearl body supporting base 3 and the aforementioned caulking part 4 pivotally.

It is these 2 kinds of 0.25mm and 0.28mm that aforementioned pearl body 5 adopts outer diameter A.Aforementioned metal system main body 2 forms the roughly certain straight cylindrical portion 22 of external diameter from apicule shape leading section 21 rear ends of the anterior position that is positioned at pearl body supporting base 3 till the rear end of metal system main body 2, become needle-like.Outer diameter A at aforementioned pearl body 5 is under the situation of 0.25mm, and the outer diameter D of aforementioned straight cylindrical portion 22 is set to 0.45mm, is under the situation of 0.28mm in the outer diameter A of aforementioned pearl body 5, and the outer diameter D of aforementioned straight cylindrical portion 22 is set to 0.48mm.

Among Fig. 2, show the example of the ball pen 6 that the ball-point pen tip 1 of the embodiment of earlier figures 1 is suitable for.Aforementioned ball pen 6 comprises beam barrel 7, is accommodated in the refill for ball-point pen (ボ one Le ペ Application レ Off イ Le) 8 in this beam barrel 7.

(beam barrel)

Aforementioned beam barrel 7 comprises metal front axle 71, plastic rear axle 72, plastic breechblock 73.

(front axle)

Aforementioned front axle 71 obtains by the machining of metal material (for example brass).The outer peripheral face of the leading section of aforementioned front axle 71 forms the apicule shape by machining.In addition, on the front end of aforementioned front axle 71, connect the front aperture that is provided with straight shape by machining, on the inner face of the front axle 71 at the rear of aforementioned front aperture, form coniform inner face by machining, on the inner face of the front axle 71 at the rear of aforementioned coniform inner face, form negative thread portion again by machining.

(rear axle)

Aforementioned rear axle 72 obtains by the injection molded of synthetic resin.Form outer screw section on the leading section outer peripheral face of aforementioned rear axle 72, the aforementioned male threaded portion can be threaded with the negative thread portion of aforementioned front axle 71 with freely loading and unloading.In addition, in the open rearward end portion of aforementioned rear axle 72, be pressed into and be fixed with breechblock 73.

(refill for ball-point pen)

Aforementioned refill for ball-point pen 8 comprise earlier figures 1 ball-point pen tip 1, be fixed with the plastic keeper 82 of this ball-point pen tip 1 on the leading section, be fixed on the leading section of this keeper 82 and support the outer peripheral face of ball-point pen tip 1 support tube 83, be fixed on aforementioned keeper 82 on the front end opening and the rear end by the ink containing tube 81 of opening.

(ink containing tube)

Aforementioned ink containing tube 81 obtains by the extrusion molding of synthetic resin (for example polypropylene).Be filled with ink 81a (for example aqueous gel ink) in the inside of aforementioned ink containing tube 81 and be arranged at this ink the rear end, be accompanied by the use of this ink 81a and advance follow body 81b (for example high viscosity fluid).

(keeper)

Aforementioned keeper 82 obtains by the injection molded of synthetic resin (for example polypropylene).Aforementioned keeper 82 is formed with the tubular rear portion that is connected the rear that is arranged on this blade of a sword portion by the blade of a sword portion that tubular front portion, connection are arranged on the rear of this tubular front portion.On aforementioned tubular front portion, be pressed into and be fixed with ball-point pen tip 1.Aforementioned blade of a sword portion contacts with the front end face of ink containing tube 81, the front end face of rear axle 72 and the taper inner face of front axle 71.Aforementioned tubular rear portion is pressed in the front end opening that is fixed on ink containing tube 81.

(support tube)

On the outer peripheral face of the tubular front portion of aforementioned keeper 82, be fixed with metal support tube 83.Aforementioned support tube 83 supports the outer peripheral face at the leading section rear of aforementioned ball-point pen tip, the rocking of the ball-point pen tip 1 when preventing to write.

(result of the test)

In table 1 and table 2, illustrate with ball pen shown in Figure 26 and carry out pearl body the come off test and the result of person's handwriting batch run.

Table 1 is illustrated in the ball-point pen tip 1 of structure shown in Figure 1 that pearl body diameter A is 0.25mm, and the value of preparing A-H and each 5 in the sample of the value various combination of the value of L/A are applicable to the result who tests in the ball pen shown in Figure 26 with them.Table 2 is illustrated in the ball-point pen tip 1 of structure shown in Figure 1 that pearl body diameter A is 0.28mm, and the value of preparing A-H and each 5 in the sample of the value various combination of the value of L/A are applicable to the result who tests in the ball pen shown in Figure 26 with them.

(table 1)

	????A ????(mm)	????A-H ????(mm)	????L/A	The pearl body result of the test that comes off	Person's handwriting batch run result
	????A ????(mm)	????A-H ????(mm)	????L/A	The pearl body result of the test that comes off	Person's handwriting batch run result	Embodiment
1	????0.25	????0.026	????0.172	??○	??△	Embodiment
1	????0.25	????0.026	????0.172	??○	??△	Embodiment 2	????0.25	????0.013	????0.238	??○	??○
Embodiment 3	????0.25	????0.018	????0.184	??○	??△	Embodiment 2	????0.25	????0.013	????0.238	??○	??○
Embodiment 3	????0.25	????0.018	????0.184	??○	??△	Comparative example 1	????0.25	????0.010	????0.296	??×	??△
Comparative example 2	????0.25	????0.030	????0.145	??-	??×	Comparative example 1	????0.25	????0.010	????0.296	??×	??△
Comparative example 2	????0.25	????0.030	????0.145	??-	??×	Comparative example 3	????0.25	????0.023	????0.126	??-	??×
Comparative example 4	????0.25	????0.010	????0.192	??×	??△	Comparative example 3	????0.25	????0.023	????0.126	??-	??×
Comparative example 4	????0.25	????0.010	????0.192	??×	??△	Comparative example 5	????0.25	????0.012	????0.130	??-	??×

(table 2)

	????A ????(mm)	????A-H ????(mm)	????L/A	The pearl body result of the test that comes off	Person's handwriting batch run result
	????A ????(mm)	????A-H ????(mm)	????L/A	The pearl body result of the test that comes off	Person's handwriting batch run result	Embodiment
1	????0.28	????0.012	????0.293	??○	??○	Embodiment
1	????0.28	????0.012	????0.293	??○	??○	Embodiment 2	????0.28	????0.023	????0.220	??○	??○
Embodiment 3	????0.28	????0.030	????0.169	??○	??△	Embodiment 2	????0.28	????0.023	????0.220	??○	??○
Embodiment 3	????0.28	????0.030	????0.169	??○	??△	Embodiment 4	????0.28	????0.018	????0.209	??○	??○
Embodiment 5	????0.28	????0.011	????0.190	??○	??○	Embodiment 4	????0.28	????0.018	????0.209	??○	??○
Embodiment 5	????0.28	????0.011	????0.190	??○	??○	Comparative example 1	????0.28	????0.034	????0.142	??-	??×
Comparative example 2	????0.28	????0.008	????0.246	??×	??○	Comparative example 1	????0.28	????0.034	????0.142	??-	??×
Comparative example 2	????0.28	????0.008	????0.246	??×	??○	Comparative example 3	????0.28	????0.014	????0.128	??-	??×

(pearl body come off test)

Aforementioned pearl body comes off test for to write angle (promptly, the angle that the axis of paper 9 and ball-point pen tip 1 constitutes) is 50 degree, writes under load 150g (gram) state in rotation, carry out with walking with 4m/ branch zigzag (ジザ ) by walking handwriting test machine.In addition, writing with paper is combination overlapping 5 on the backing plate that is formed by hard vinyl chloride resin making sheet.Every 200m Writing distance that is confirmed to be that the pearl body comes off contacts ball-point pen tip 1 front end with the bonding plane of adhesive tape, have or not and investigation pearl body comes off.Come off being evaluated as till the Writing distance 1000m of result of test of aforementioned pearl body do not finding to be " zero " under the situation that the pearl body comes off, and finding to be " * " under the situation that the pearl body comes off.Moreover the sample of " * " in the person's handwriting batch run is not owing to carry out the test that comes off of pearl body, so be recited as ".

(person's handwriting batch run)

Aforementioned mark batch run is that the ball pen 6 of aforementioned preparation is inspectorally hand-writtenly confirmed by 3.Being evaluated as not producing under the person's handwriting situation intermittently of the result of aforementioned person's handwriting batch run is " zero ", just do not produce under the person's handwriting situation intermittently when being minimum in the person's handwriting angle to be " △ ", and to produce under the person's handwriting situation intermittently be " * " frequent.

Fig. 3 presents in diagrammatic form the result of table 1, gets L/A on the longitudinal axis, gets A-H on transverse axis, and the value of the embodiment 1～embodiment 3 of table 1 and the L/A of comparative example 1～comparative example 5 and the value of A-H are by black circle " ● " mark.In following () of aforementioned mark " ● ", result and person's handwriting batch run result that the pearl body corresponding with this mark comes off and test are shown, the left side illustrates the result that the pearl body comes off and tests, and the right side illustrates person's handwriting batch run result.Can judge when the A-H value is bigger than 0.010mm (situation of 0.010mm＜A-H) from the chart of this Fig. 3 does not produce the pearl body and comes off.In addition, can judge from the chart of Fig. 3, (situation of 0.15＜L/A) produces person's handwriting intermittence hardly when the value of L/A is bigger than 0.15.

Fig. 4 presents in diagrammatic form the result of table 2, gets L/A on the longitudinal axis, gets A-H on transverse axis, and the value of the embodiment 1～embodiment 5 of table 2 and the L/A of comparative example 1～comparative example 3 and the value of A-H are by black circle " ● " mark.In following () of mark " ● ", result and person's handwriting batch run result that the pearl body corresponding with this mark comes off and test are shown, the left side illustrates the result that the pearl body comes off and tests, and the right side illustrates person's handwriting result of the test intermittently.Can judge when the A-H value is bigger than 0.010mm (situation of 0.010mm＜A-H) from the chart of this Fig. 4 does not produce the pearl body and comes off.In addition, can judge from the chart of Fig. 4, (situation of 0.15＜L/A) produces person's handwriting intermittence hardly when the value of L/A is bigger than 0.15.

Writing reliability (the Books I is cut り) result of the test with what ball pen shown in Figure 26 carried out shown in table 3 and the table 4.

Table 3 is used in the result after the test in the ball pen shown in Figure 26 for being that the sample that the value of B/A is different is respectively prepared 5 in the ball-point pen tip 1 of structure shown in Figure 1 of 0.25mm at pearl body diameter A with them.

Table 4 is used in the result after the test in the ball pen shown in Figure 26 for being that the sample that the value of B/A is different is respectively prepared 5 in the ball-point pen tip 1 of structure shown in Figure 1 of 0.28mm at pearl body diameter A with them.

(table 3)

	????A ????(mm)	????A-H ????(mm)	????L/A	????B/A	Pearl body supporting base abrasion (mm)	Write the bad generation radical of reliability
	????A ????(mm)	????A-H ????(mm)	????L/A	????B/A	Pearl body supporting base abrasion (mm)	Write the bad generation radical of reliability	Embodiment
1	????0.25	????0.016	????0.235	????0.324	??0.006	??0	Embodiment
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	Comparative example 1	????0.25	????0.016	????0.235	????0.448	??0.011	??1

(table 4)

	????A ????(mm)	????A-H ????(mm)	????L/A	????B/A	Pearl body supporting base abrasion (mm)	Write the bad generation radical of reliability
	????A ????(mm)	????A-H ????(mm)	????L/A	????B/A	Pearl body supporting base abrasion (mm)	Write the bad generation radical of reliability	Embodiment
1	????0.28	????0.018	????0.235	????0.329	??0.003	??0	Embodiment
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	Comparative example 1	????0.28	????0.018	????0.235	????0.436	??0.010	??0??????*

*: to write reliability bad though do not produce, and produced person's handwriting intermittently.

(writing reliability test)

Aforementioned writing in the reliability test, the ink 81a that is filled in the inside of ink containing tube 81 is the aqueous gel ink of loading 0.4g, use ball pen 6 shown in Figure 2, the handwriting test machine of being write by helically (write angle 70 degree, write load 100g, writing speed 4m/ branch) carries out.The abrasion of the pearl body supporting base of table 3 and table 4 are measured after writing 700m by aforementioned handwriting test machine.Moreover the value of the abrasion of the pearl body supporting base of table 3 and table 4 is each mean value of 5.In addition, the writing the bad filling ink that is meant of reliability and can not use at last of table 3 and table 4 write the bad generation radical of reliability in each 5 of the numeric representations shown in table 3 and the table 4.

As shown in the result of table 3 and table 4, the nib that the abrasion of pearl body supporting base are big (comparative example 1 of table 3 and comparative example 2, the comparative example 1 of table 4 and comparative example 2) is because the bad or person's handwriting of reliability intermittence is write in generation such as paper plug.On the other hand, the little nib (embodiment 1 of table 3, the embodiment 1 of table 4) of the abrasion of pearl body supporting base does not produce to be write badly, filling ink can be used at last.

(the 2nd embodiment)

Fig. 6 illustrates the 2nd embodiment of ball pen 1 of the present invention.Present embodiment ball-point pen tip 1 comprises: have the metal system main body 2 of the cylindric SUS304 system of apicule shape leading section 21, be formed at pearl body supporting base 3 near the inner face the front end of this metal system main body 2 by machining, be the circle-shaped caulking part that forms 4, be held in pearl body 5 between aforementioned pearl body supporting base 3 and the aforementioned caulking part portion 4 pivotally by the front end internal modification with the apicule shape leading section 21 of aforementioned metal system main body 2.

Aforementioned apicule shape leading section 21 is crossed aforementioned pearl body supporting base 3 from aforementioned caulking part 4 and rearward is formed extended at both sides on the leading section outside of metal system main body 2.On aforementioned pearl body supporting base 3, perforation is provided with centre bore 31 and induces groove 32 with a plurality of (is 3 at this) ink that this centre bore 31 radioactively is communicated with in the axial direction.It is these 2 kinds of 0.25mm and 0.28mm that aforementioned pearl body 5 adopts outer diameter A.

Among Fig. 7, the example of the ball pen 6 that the ball-point pen tip 1 of the embodiment of earlier figures 6 is suitable for is shown.Aforementioned ball pen 6 comprises beam barrel 7, is accommodated in the refill for ball-point pen 8 in this beam barrel 7.

(beam barrel)

(front axle)

Aforementioned front axle 71 obtains by the machining of metal material (for example brass).The outer peripheral face of the leading section of aforementioned front axle 71 forms the apicule shape by machining.In addition, on the front end of aforementioned front axle 71, be provided with straight shape front aperture by the machining perforation, on the inner face of the front axle 71 at the rear of aforementioned front aperture, form coniform inner face by machining, on the inner face of the front axle 71 at the rear of aforementioned coniform inner face, form negative thread portion again by machining.

(rear axle)

(refill for ball-point pen)

Aforementioned refill for ball-point pen 8 comprise earlier figures 6 ball-point pen tip 1, be fixed with the plastic keeper 82 of this ball-point pen tip 1 on the leading section, be fixed on aforementioned keeper 82 on the front end opening and the rear end by the ink containing tube 81 of opening.

(ink containing tube)

Aforementioned ink containing tube 81 obtains by the extrusion molding of synthetic resin (for example polypropylene).Be filled with ink 81a (for example aqueous gel ink) in the inside of aforementioned ink containing tube 81 and be arranged at the rear end of this ink 81a, be accompanied by the use of this ink and advance follow body 81b (for example high viscosity fluid).

(keeper)

Aforementioned keeper 82 obtains by the injection molded of synthetic resin (for example polypropylene).Aforementioned keeper 82 is formed with the tubular rear portion that is connected the rear that is arranged on this blade of a sword portion by the blade of a sword portion that tubular front portion, connection are arranged on the rear of this tubular front portion.On aforementioned tubular front portion, be pressed into and be fixed with ball-point pen tip 1.Aforementioned blade of a sword portion contacts with the front end face of ink receptacle 81, the front end face of rear axle 72 and the coniform inner face of front axle 71.Aforementioned tubular rear portion is pressed in the front end opening that is fixed on ink containing tube 81.

(result of the test)

In table 5 and table 6, illustrate with ball pen shown in Figure 76 and carry out pearl body the come off test and the result of person's handwriting batch run.

Table 5 is illustrated in the ball-point pen tip 1 of structure shown in Figure 6 that pearl body diameter A is 0.25mm, and the value of preparing A-H and each 5 in the sample of the value various combination of the value of L/A are applicable to the result who tests in the ball pen shown in Figure 76 with them.Table 6 is illustrated in the ball-point pen tip 1 of structure shown in Figure 6 of pearl body diameter 0.28mm, and the value of preparing A-H and each 5 in the sample of the value various combination of the value of L/A are applicable to the result who tests in the ball pen shown in Figure 76 with them.

(table 5)

	????A ????(mm)	????A-H ????(mm)	????L/A	The pearl body result of the test that comes off	Person's handwriting batch run result
	????A ????(mm)	????A-H ????(mm)	????L/A	The pearl body result of the test that comes off	Person's handwriting batch run result	Embodiment
1	????0.25	????0.015	????0.216	??○	??○	Embodiment
1	????0.25	????0.015	????0.216	??○	??○	Embodiment 2	????0.25	????0.022	????0.161	??○	??○
Embodiment 3	????0.25	????0.015	????0.228	??○	??○	Embodiment 2	????0.25	????0.022	????0.161	??○	??○
Embodiment 3	????0.25	????0.015	????0.228	??○	??○	Embodiment 4	????0.25	????0.019	????0.203	??○	??○
Embodiment 5	????0.25	????0.028	????0.151	??○	??△	Embodiment 4	????0.25	????0.019	????0.203	??○	??○
Embodiment 5	????0.25	????0.028	????0.151	??○	??△	Comparative example 1	????0.25	????0.008	????0.267	??×	??△

(table 6)

	????A ????(mm)	????A-H ????(mm)	????L/A	The pearl body result of the test that comes off	Person's handwriting batch run result
	????A ????(mm)	????A-H ????(mm)	????L/A	The pearl body result of the test that comes off	Person's handwriting batch run result	Embodiment
1	????0.28	????0.015	????0.235	??○	??○	Embodiment
1	????0.28	????0.015	????0.235	??○	??○	Embodiment 2	????0.28	????0.027	????0.154	??○	??△
Embodiment 3	????0.28	????0.024	????0.196	??○	??○	Embodiment 2	????0.28	????0.027	????0.154	??○	??△
Embodiment 3	????0.28	????0.024	????0.196	??○	??○	Comparative example 1	????0.28	????0.008	????0.285	??×	??○
Comparative example 2	????0.28	????0.010	????0.269	??×	??○	Comparative example 1	????0.28	????0.008	????0.285	??×	??○
Comparative example 2	????0.28	????0.010	????0.269	??×	??○	Comparative example 3	????0.28	????0.034	????0.144	??-	??×

(pearl body come off test)

Aforementioned pearl body comes off test for being 50 degree writing angle (promptly, the angle that constitutes of the axis of paper 9 and ball-point pen tip 1), writes under load 150g (gram) state and is carried out with 4m/ branch zigzag in rotation by walking handwriting test machine with walking.In addition, writing with paper is combination overlapping 5 on the backing plate that is formed by hard vinyl chloride resin making sheet.Every 200m Writing distance that is confirmed to be that the pearl body comes off contacts ball-point pen tip 1 front end with the bonding plane of adhesive tape, have or not and investigation pearl body comes off.Come off being evaluated as till the Writing distance 1000m of result of test of aforementioned pearl body do not finding to be " zero " under the situation that the pearl body comes off, and finding to be " * " under the situation that the pearl body comes off.Moreover the sample of " * " in the person's handwriting batch run is not owing to carry out the test that comes off of pearl body, so be recited as ".

(person's handwriting batch run)

Fig. 8 presents in diagrammatic form the result of table 5, gets L/A on the longitudinal axis, gets A-H on transverse axis, and the value of the embodiment 1～embodiment 5 of table 5 and the L/A of comparative example 1 and the value of A-H are by black circle " ● " mark.In following () of aforementioned mark " ● ", result and person's handwriting batch run result that the pearl body corresponding with this mark comes off and test are shown, the left side illustrates the result that the pearl body comes off and tests, and the right side illustrates person's handwriting batch run result.Can judge when the A-H value is bigger than 0.010mm (situation of 0.010mm＜A-H) from the chart of this Fig. 8 does not produce the pearl body and comes off.In addition, can judge from the chart of Fig. 8, (situation of 0.15＜L/A) produces person's handwriting intermittence hardly when the value of L/A is bigger than 0.15.

Fig. 9 presents in diagrammatic form the result of table 6, gets L/A on the longitudinal axis, gets A-H on transverse axis, and the value of the embodiment 1～embodiment 3 of table 6 and the L/A of comparative example 1～comparative example 3 and the value of A-H are by black circle " ● " mark.In following () of mark " ● ", result and person's handwriting batch run result that the pearl body corresponding with this mark comes off and test are shown, the left side illustrates the result that the pearl body comes off and tests, and the right side illustrates person's handwriting result of the test intermittently.Can judge when the A-H value is bigger than 0.010mm (situation of 0.010mm＜A-H) from the chart of this Fig. 9 does not produce the pearl body and comes off.In addition, can judge from the chart of Fig. 9, (situation of 0.15＜L/A) produces person's handwriting intermittence hardly when the value of L/A is bigger than 0.15.

Writing the reliability test result with what ball pen shown in Figure 76 carried out shown in table 7 and the table 8.

Table 7 is used in the result after the test in the ball pen shown in Figure 76 for being that the sample that the value of B/A is different is respectively prepared 5 in the ball-point pen tip 1 of structure shown in Figure 6 of 0.25mm at pearl body diameter A with them.

Table 8 is used in the result after the test in the ball pen shown in Figure 76 for being that the sample that the value of B/A is different is respectively prepared 5 in the ball-point pen tip 1 of structure shown in Figure 6 of 0.28mm at pearl body diameter A with them.

Table 7

	????A ????(mm)	????A-H ????(mm)	????L/A	????B/A	Pearl body supporting base abrasion (mm)	Write the bad generation radical of reliability
	????A ????(mm)	????A-H ????(mm)	????L/A	????B/A	Pearl body supporting base abrasion (mm)	Write the bad generation radical of reliability	Embodiment
1	????0.25	????0.017	????0.235	????0.320	??0.009	??0	Embodiment
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	Comparative example 1	????0.25	????0.017	????0.235	????0.444	??0.015	??2

Table 8

	????A ????(mm)	????A-H ????(mm)	????L/A	????B/A	Pearl body supporting base abrasion (mm)	Write the bad generation radical of reliability
	????A ????(mm)	????A-H ????(mm)	????L/A	????B/A	Pearl body supporting base abrasion (mm)	Write the bad generation radical of reliability	Embodiment
1	????0.28	????0.018	????0.235	????0.329	??0.008	??0	Embodiment
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	Comparative example 1	????0.28	????0.018	????0.235	????0.432	??0.013	??1

(writing reliability test)

Aforementioned writing in the reliability test, the ink 81a that is filled in the inside of ink containing tube 81 is the aqueous gel ink of loading 0.4g, use ball pen 6 shown in Figure 7, the handwriting test machine of being write by helically (write angle 70 degree, write load 100g, writing speed 4m/ branch) carries out.The abrasion of the pearl body supporting base of table 7 and table 8 are measured after writing 700m by aforementioned handwriting test machine.Moreover the value of the abrasion of the pearl body supporting base of table 7 and table 8 is each mean value of 5.In addition, the writing the bad filling ink that is meant of reliability and can not use at last of table 7 and table 8 write the bad generation radical of reliability in each 5 of the numeric representations shown in table 7 and the table 8.

As shown in the result of table 7 and table 8, the nib that the abrasion of pearl body supporting base are big (comparative example 1 of table 7 and comparative example 2, the comparative example 1 of table 8 and comparative example 2) is because the bad or person's handwriting of reliability intermittence is write in generation such as paper plug.On the other hand, the little nib (embodiment 1 of table 7, the embodiment 1 of table 8) of the abrasion of pearl body supporting base does not produce to be write badly, filling ink can be used at last.

(the 3rd embodiment)

Figure 10 to Figure 12 illustrates the 3rd embodiment of ball-point pen tip 1 of the present invention.

(ball-point pen tip)

Present embodiment ball-point pen tip 1 comprises: the metal system main body 2 of the straight cylindrical that constitutes with stainless steel austenite stainless steels such as (for example) SUS321, comprise pearl body supporting base 3 by a plurality of (is 3 at this) inner projection that near the inner face the front end of this metal system main body 2, forms to the pushing of inside distortion (punch process), be the circle-shaped caulking part that forms 4 by front end internal modification (riveted joint distortion) with the apicule shape leading section 21 of aforementioned metal system main body 2, the pearl body that is formed between aforementioned pearl body supporting base 3 and the aforementioned caulking part portion 4 grips hole 23, be held in the pearl body 5 in the aforementioned pearl body gripping hole 23 pivotally.

It is the pearl body of 0.25mm that aforementioned pearl body 5 adopts outer diameter A.Aforementioned metal system main body 2 begins to be formed with straight cylindrical portion 22 to the rear end to metal system main body 2 from the rear end of apicule shape leading section 21, constitutes needle-like.Outer diameter A at aforementioned pearl body 5 is under the situation of 0.25mm, and the external diameter of aforementioned straight cylindrical portion 22 is set to 0.45mm.The removable amount C that aforementioned pearl body grips the axial pearl body 5 in the hole 23 is set to 7 μ m.The axial overhang L of aforementioned pearl body 5 is set to 23.5% of pearl body diameter A.

On the outer peripheral face of aforementioned caulking part 4, form taper seat 41.When having drawn from imaginary line m that the taper seat 41 of the outer peripheral face of aforementioned caulking part 4 forwards extends, under pearl body 5 and pearl body supporting base 3 contact conditions, pearl body 5 can be more outstanding than aforementioned imaginary line m.Thus, when writing, the front end neighboring of caulking part (being the front end of taper seat 41) can contact with paper more strongly than the back vertex angle part (being the rear end of taper seat 41) of caulking part 4, and the internal modification of caulking part 4 can be easier.

The wall thickness T of the front end of aforementioned caulking part 4 is: obtain the intersection point P of the imaginary line m that forwards prolongs from the taper seat 41 of the outer peripheral face of aforementioned riveted joint 4 and the imaginary line n that prolongs to foreign side's (promptly for axis normal direction) from the front end inner rim radius vector of caulking part 4, measure the distance of the front end inner rim of this intersection point P and caulking part 4.In the present embodiment, the wall thickness T of the front end of aforementioned caulking part 4 is 6 μ m.

(ball pen)

The example of the ball pen 6 of the ball-point pen tip 1 of suitable Figure 10 shown in Fig. 2.In addition, because the structure of the beam barrel 7 of aforementioned ball pen 6 and refill for ball-point pen 8 is identical with the 1st embodiment, omit its explanation.

(result of the test)

Table 9 is illustrated in the ball pen of structure shown in Figure 2 that pearl body diameter A is 0.25mm, carries out the result of handwriting test for 2 kinds of different samples of wall thickness T of the front end of caulking part 4.In addition, in the ink containing tube 81 of aforementioned ball pen 6, be filled with aqueous gel ink 0.4g.The handwriting test machine that aforementioned handwriting test is write by helically (writing speed: the 4m/ branch, write load: 50g, is write angle: 70 degree) carry out.

Table 9

	Embodiment	Comparative example
	Embodiment	Comparative example	The outer diameter A of pearl body (mm)	????0.25	????0.25
Write the wall thickness T (μ m) of the front end of the preceding caulking part of beginning	????6	????30	The outer diameter A of pearl body (mm)	????0.25	????0.25
	????6	????30	Write the internal diameter H (mm) of the front end inner rim of the preceding caulking part of beginning	????0.234	????0.234
Write the internal diameter H (mm) of the front end inner rim of the caulking part after the end	????0.226	????0.240		????0.234	????0.234
	????0.226	????0.240	Write the axially-displaceable momentum C (μ m) of the preceding pearl body of beginning	????7	????7
Write the axially-displaceable momentum C (μ m) of the pearl body after the end	????7	????22		????7	????7
	????7	????22	The ink utilization rate	????100％	????38％
Write the sense of writing when beginning	Good	Bad	The ink utilization rate	????100％	????38％
Write the sense of writing when beginning	Good	Bad	The paper plug	Do not have	Have
The pearl body comes off	Do not have	Do not have	The paper plug	Do not have	Have

In the embodiment of table 9, the internal diameter H of the front end inner rim of caulking part 4 diminishes in finishing during the back (filling ink use last till) from writing before the beginning to writing, and can differentiate serves as reasons writes and make caulking part 4 to internal modification.In addition, in the embodiment of table 9, though pearl body supporting base 3 is worn away, the axially-displaceable momentum C of pearl body 5 finishes not change till the back to writing before writing beginning, is maintained certain.In the embodiment of table 9, writing when writing beginning feels good.That is, begin to access the good sense of writing to writing end from writing.In the embodiment of table 9, there are not paper plug and pearl body to come off, the ink of filling is used by 100%.The embodiment of table 9 shown in Figure 13 (a) write beginning before, Figure 13 (b) show table 9 embodiment write end after.

In the comparative example of table 9, change was big slightly in the internal diameter H of the front end inner rim of caulking part 4 finished during the back (to by the paper plug till can not writing) from writing before the beginning to writing.In the comparative example of table 9, the axially-displaceable momentum C of pearl body 5 is owing to the abrasion of pearl body supporting base 3 increase.In the comparative example of table 9, writing sense and the paper of writing when beginning collude and hang and bad.In addition, in the comparative example of table 9, filling ink used 38% o'clock because paper plug and can not writing.The comparative example of table 9 shown in Figure 14 (a) write beginning before, Figure 14 (b) show table 9 comparison write end after.

(the 4th embodiment)

Embodiment at aqueous ballpoint pen 6 of the present invention shown in Fig. 2 and Figure 15.

Aqueous ballpoint pen 6 of the present invention comprises beam barrel 7, is accommodated in refill for ball-point pen 8 in this beam barrel 7 convertibly.

(beam barrel)

(front axle)

Aforementioned front axle 71 obtains by the machining of metal material (for example brass).The outer peripheral face of the leading section of aforementioned front axle 71 forms the apicule shape by machining.In addition, on the front end of aforementioned front axle 71, connect by machining and to be provided with straight shape front aperture, on the inner face of the front axle 71 at the rear of aforementioned front aperture, form coniform inner face by machining, on the inner face of the front axle 71 at the rear of aforementioned coniform inner face, be formed with negative thread portion again by machining.

(rear axle)

Aforementioned rear axle 72 obtains by the injection molded of synthetic resin.Be formed with outer screw section on the leading section outer peripheral face of aforementioned rear axle 72, the aforementioned male threaded portion can be threaded with the negative thread portion of aforementioned front axle 71 with freely loading and unloading.In addition, in the open rearward end portion of aforementioned rear axle 72, be pressed into and be fixed with breechblock 73.

(refill for ball-point pen)

Aforementioned refill for ball-point pen 8 comprise ball-point pen tip 1, be fixed with the plastic keeper 82 of this ball-point pen tip 1 on the leading section, be fixed on the leading section of this keeper 82 and support the outer peripheral face of ball-point pen tip 1 support tube 83, be fixed on aforementioned keeper 82 on the front end opening and the rear end by the ink containing tube 81 of opening.

(ink containing tube)

Aforementioned ink containing tube 81 obtains by the extrusion molding of synthetic resin (for example polypropylene).Be filled with ink 81a (for example aqueous gel ink) in the inside of aforementioned ink containing tube 81 and be arranged at this ink 81a the rear end, be accompanied by the use of this ink 81a and advance follow body 81b (for example high viscosity fluid).

(keeper)

Aforementioned keeper 82 obtains by the injection molded of synthetic resin (for example polypropylene).Aforementioned keeper 82 is formed by tubular front portion, blade of a sword portion and tubular rear portion.On aforementioned tubular front portion, be pressed into and be fixed with ball-point pen tip 1.Aforementioned blade of a sword portion is connected in the rear of aforementioned tubular front portion, and contacts with the front end face of ink receptacle 81, the front end face of rear axle 72 and the taper inner face of front axle 71.Aforementioned tubular rear portion is connected on the rear of aforementioned blade of a sword portion, and is pressed in the front end opening that is fixed on ink containing tube 81.

(ball-point pen tip)

Aforementioned ball-point pen tip 1 comprises: the metal system main body 2 of the straight cylindrical that constitutes with stainless steel austenite stainless steels such as (for example) SUS321, comprise pearl body supporting base 3 by a plurality of (is 3 at this) inner projection near the inner face of the front end that is formed at this metal system main body 2 to the pushing of inside distortion (punch process), be the circle-shaped caulking part that forms 4 by front end internal modification (riveted joint distortion) with the apicule shape leading section 21 of aforementioned metal system main body 2, the pearl body that is formed between aforementioned pearl body supporting base 3 and the aforementioned caulking part 4 grips hole 23, the pearl body 5 that in aforementioned pearl body grips hole 23, is held pivotally.

It is the pearl body of 0.25mm that aforementioned pearl body 5 adopts external diameter.The rear end of aforementioned metal system main body 2 from the rear end of the leading section 21 of apicule shape to metal system main body 2 is formed with straight cylindrical portion 22, becomes needle-like.Outer diameter A at aforementioned pearl body 5 is under the situation of 0.25mm, and the external diameter of aforementioned straight cylindrical portion 22 is set to 0.45mm.The removable amount C that aforementioned pearl body grips the axial pearl body 5 in the hole 23 is set to 8 μ m.The axial overhang L of aforementioned pearl body 5 is set to 23.5% of pearl body diameter A.The exhausted amount of ink of the aqueous ballpoint pen 6 of present embodiment is a mensuration in Writing distance 0m～100m interval at this, is 45mg.In the hand-written test of aforementioned aqueous ballpoint pen 6, do not have person's handwriting ooze profit or person's handwriting write out the style of calligraphy characterized by hollow strokes, can access and have superfine person's handwriting width the (person's handwriting of 0.13mm～0.16mm).

(support tube)

On the outer peripheral face of the tubular front portion of aforementioned keeper 82, be fixed with metal support tube 83.Aforementioned support tube 83 is supporting the outer peripheral face at the leading section rear of aforementioned ball-point pen tip 1, and ball-point pen tip 1 rocks when preventing to write.

(result of the test)

Table 10 is illustrated in the aqueous ballpoint pen 6 of Fig. 2 that pearl body diameter A is 0.25mm and structure shown in Figure 15, the result that the 3 kind samples different to axially-displaceable momentum C, the exhausted amount of ink of pearl body 5 (embodiment, comparative example 1, comparative example 2) carry out hand-written test.

Table 10

	Embodiment	Comparative example 1	Comparative example 2
	Embodiment	Comparative example 1	Comparative example 2	Pearl body diameter A (mm)	????0.25	????0.25	????0.25
Exhausted amount of ink (mg)	????45	????65	????27	Pearl body diameter A (mm)	????0.25	????0.25	????0.25
Exhausted amount of ink (mg)	????45	????65	????27	The axially-displaceable momentum C (μ m) of pearl body	????8	????20	????2
Person's handwriting write out the style of calligraphy characterized by hollow strokes	Do not have	Do not have	Have slightly	The axially-displaceable momentum C (μ m) of pearl body	????8	????20	????2
	Do not have	Do not have	Have slightly	Person's handwriting oozes profit	Do not have	Have slightly	Do not have

(mensuration of exhausted amount of ink)

The mensuration of aforementioned exhausted amount of ink is to measure the handwriting test machine write with helical form (writing speed: the 4m/ branch, write load: 50g, to write angle: 70 degree) write the exhausted amount of ink of Writing distance from 0m to 100m.

(evaluation of person's handwriting)

Aforementioned person's handwriting be evaluated as by 3 inspectorally hand-writtenly to come to carry out " person's handwriting writes out the style of calligraphy characterized by hollow strokes " and reach the affirmation that " person's handwriting oozes profit " has or not to being used to measure aqueous ballpoint pen 6 before the aforementioned exhausted amount of ink.

Claims

1, a kind of ball-point pen tip, it is formed with pearl body supporting base near the inner face the front end of metal system main body, take in the pearl body of the not enough 0.3mm of external diameter in the front side of aforementioned pearl body supporting base, by the apicule shape leading section internal modification with aforementioned metal system main body is the circle-shaped caulking part that forms, between aforementioned pearl body supporting base and aforementioned caulking part, grip pivotally the pearl body is arranged, and the part of pearl body is forwards outstanding from the front end of aforementioned caulking part, it is characterized in that

The external diameter of aforementioned pearl body be the internal diameter of A, aforementioned caulking part to be H, aforementioned pearl body stretch out when being of a size of L from the front end of caulking part, satisfy the relation of 0.010mm＜A-H＜0.035mm and 0.15＜L/A＜0.30.

2, ball-point pen tip as claimed in claim 1, it is characterized in that, the external diameter of aforementioned pearl body be the internal diameter of A, aforementioned caulking part to be H, aforementioned pearl body stretch out when being of a size of L from the front end of caulking part, satisfy the relation of 0.010mm＜A-H＜0.030mm and 0.15＜L/A＜0.25.

3, a kind of ball-point pen tip, it is formed with pearl body supporting base near the inner face the front end of metal system main body, take in the pearl body of the not enough 0.3mm of external diameter in the front side of aforementioned pearl body supporting base, by the apicule shape leading section internal modification with aforementioned metal system main body is the circle-shaped caulking part that forms, between aforementioned pearl body supporting base and aforementioned caulking part, grip pivotally the pearl body is arranged, and the part of pearl body is forwards outstanding from the front end of aforementioned caulking part, it is characterized in that

Being A, aforementioned pearl body at the external diameter of aforementioned pearl body stretches out when being of a size of L from the front end of caulking part, satisfies the relation of 0.15＜L/A＜0.25.

4, a kind of ball-point pen tip, it is formed with pearl body supporting base near the inner face the front end of metal system main body, take in the pearl body of the not enough 0.3mm of external diameter in the front side of aforementioned pearl body supporting base, by the apicule shape leading section internal modification with aforementioned metal system main body is the circle-shaped caulking part that forms, between aforementioned pearl body supporting base and aforementioned caulking part, grip pivotally the pearl body is arranged, and a front end from aforementioned caulking part of pearl body is forwards outstanding, it is characterized in that

At the external diameter of aforementioned pearl body is the internal diameter of A, aforementioned caulking part when being H, satisfies the relation of 0.010mm＜A-H＜0.035mm.

5, ball-point pen tip as claimed in claim 1 is characterized in that, when the diameter of the imaginary inscribed circle of drawing at the center of aforementioned pearl body supporting base is B, satisfies the relation of B/A＜0.4.

6, ball-point pen tip as claimed in claim 1 is characterized in that, has straight cylindrical portion at the rear of the apicule shape leading section of metal system main body, and the outer diameter D of aforementioned straight cylindrical portion is not enough 0.5mm.

7, ball-point pen tip as claimed in claim 6 is characterized in that, the outer diameter A of aforementioned pearl body is 0.15mm～0.29mm, and the outer diameter D of aforementioned straight cylindrical portion is 0.30mm～0.49mm.

8, ball-point pen tip as claimed in claim 7 is characterized in that, the outer diameter A of aforementioned pearl body is 0.25mm～0.28mm, and the outer diameter D of aforementioned straight cylindrical portion is 0.40mm～0.48mm.

9, ball-point pen tip as claimed in claim 1 is characterized in that, is out of shape by near the sidewall the front end of metal system main body is pushed to inside, and is formed with pearl body supporting base near the inner face the front end of metal system main body.

10, ball-point pen tip as claimed in claim 1 is characterized in that, by with near the inner face machining the front end of metal system main body, and is formed with pearl body supporting base near the inner face the front end of metal system main body.

11, ball-point pen tip as claimed in claim 3 is characterized in that, when the diameter of the imaginary inscribed circle of drawing at the center of aforementioned pearl body supporting base is B, satisfies the relation of B/A＜0.4.

12, ball-point pen tip as claimed in claim 3 is characterized in that, has straight cylindrical portion at the rear of the apicule shape leading section of metal system main body, and the outer diameter D of aforementioned straight cylindrical portion is not enough 0.5mm.

13, ball-point pen tip as claimed in claim 12 is characterized in that, the outer diameter A of aforementioned pearl body is 0.15mm～0.29mm, and the outer diameter D of aforementioned straight cylindrical portion is 0.30mm～0.49mm.

14, ball-point pen tip as claimed in claim 13 is characterized in that, the outer diameter A of aforementioned pearl body is 0.25mm～0.28mm, and the outer diameter D of aforementioned straight cylindrical portion is 0.40mm～0.48mm.

15, ball-point pen tip as claimed in claim 3 is characterized in that, is out of shape by near the sidewall the front end of metal system main body is pushed to inside, and is formed with pearl body supporting base near the inner face the front end of metal system main body.

16, ball-point pen tip as claimed in claim 3 is characterized in that, by with near the inner face machining the front end of metal system main body, and is formed with pearl body supporting base near the inner face the front end of metal system main body.

17, ball-point pen tip as claimed in claim 4 is characterized in that, when the diameter of the imaginary inscribed circle of drawing at the center of aforementioned pearl body supporting base is B, satisfies the relation of B/A＜0.4.

18, ball-point pen tip as claimed in claim 4 is characterized in that, has straight cylindrical portion at the rear of the apicule shape leading section of metal system main body, and the outer diameter D of aforementioned straight cylindrical portion is not enough 0.5mm.

19, ball-point pen tip as claimed in claim 18 is characterized in that, the outer diameter A of aforementioned pearl body is 0.15mm～0.29mm, and the outer diameter D of aforementioned straight cylindrical portion is 0.30mm～0.49mm.

20, ball-point pen tip as claimed in claim 19 is characterized in that, the outer diameter A of aforementioned pearl body is 0.25mm～0.28mm, and the outer diameter D of aforementioned straight cylindrical portion is 0.40mm～0.48mm.

21, ball-point pen tip as claimed in claim 4 is characterized in that, is out of shape by near the sidewall the front end of metal system main body is pushed to inside, and is formed with pearl body supporting base near the inner face the front end of metal system main body.

22, ball-point pen tip as claimed in claim 4 is characterized in that, by with near the inner face machining the front end of metal system main body, and is formed with pearl body supporting base near the inner face the front end of metal system main body.

23, ball-point pen tip as claimed in claim 1 is characterized in that, its structure is that the wall thickness of the front end of aforementioned caulking part is set to below the 25 μ m, can make the caulking part internal modification with contacting of paper when writing.

24, ball-point pen tip as claimed in claim 23 is characterized in that, the axial removable amount that is held in the pearl body between pearl body supporting base and the caulking part is set to 3 μ m～18 μ m.

25, ball-point pen tip as claimed in claim 23 is characterized in that, from the front end of caulking part to the pearl body overhang in axial the place ahead be the pearl body diameter more than 15% and less than 25%.

26, ball-point pen tip as claimed in claim 23 is characterized in that, when having drawn from imaginary line that the taper seat of the outer peripheral face of caulking part forwards prolongs, the pearl body is more outstanding unlike aforementioned imaginary line.

27, ball-point pen tip as claimed in claim 3 is characterized in that, its structure is that the wall thickness of the front end of aforementioned caulking part is set to below the 25 μ m, can make the caulking part internal modification with contacting of paper when writing.

28, ball-point pen tip as claimed in claim 27 is characterized in that, the axial removable amount that is held in the pearl body between pearl body supporting base and the caulking part is set to 3 μ m～18 μ m.

29, ball-point pen tip as claimed in claim 27 is characterized in that, from the front end of caulking part to the pearl body overhang in axial the place ahead be the pearl body diameter more than 15% and less than 25%.

30, ball-point pen tip as claimed in claim 27 is characterized in that, when having drawn from imaginary line that the taper seat of the outer peripheral face of caulking part forwards prolongs, the pearl body is more outstanding unlike aforementioned imaginary line.

31, ball-point pen tip as claimed in claim 4 is characterized in that, its structure is that the wall thickness of the front end of aforementioned caulking part is set to below the 25 μ m, can make the caulking part internal modification with contacting of paper when writing.

32, ball-point pen tip as claimed in claim 31 is characterized in that, the axial removable amount that is held in the pearl body between pearl body supporting base and the caulking part is set to 3 μ m～18 μ m.

33, ball-point pen tip as claimed in claim 31 is characterized in that, from the front end of caulking part to the pearl body overhang in axial the place ahead be the pearl body diameter more than 15% and less than 25%.

34, ball-point pen tip as claimed in claim 31 is characterized in that, when having drawn from imaginary line that the taper seat of the outer peripheral face of caulking part forwards prolongs, the pearl body is more outstanding unlike aforementioned imaginary line.

35, a kind of aqueous ballpoint pen that uses the described ball-point pen tip of claim 1 for taking in water-base ink in inside, can discharging the structure of aforementioned ink by the front end of aforementioned ball-point pen tip, is characterized in that,

The axially-displaceable momentum that the pearl body grips the pearl body in the hole is below the 18 μ m.

36, aqueous ballpoint pen as claimed in claim 35 is characterized in that, the exhausted amount of ink of Writing distance 0m～100m is not enough 60mg.

37, aqueous ballpoint pen as claimed in claim 36, it is characterized in that, the external diameter of aforementioned pearl body is more than the 0.1mm and not enough 0.3mm, the axial removable amount that aforementioned pearl body grips the pearl body in the hole is 3 μ m～18 μ m, and the exhausted amount of ink of Writing distance 0m～100m is more than the 8mg and not enough 60mg.

38, aqueous ballpoint pen as claimed in claim 35 is characterized in that, the axial overhang of aforementioned pearl body be the pearl body external diameter more than 15% and less than 25%.

39, a kind of aqueous ballpoint pen that uses the described ball-point pen tip of claim 3 for taking in water-base ink in inside, can discharging the structure of aforementioned ink by the front end of aforementioned ball-point pen tip, is characterized in that,

40, aqueous ballpoint pen as claimed in claim 39 is characterized in that, the exhausted amount of ink of Writing distance 0m～100m is not enough 60mg.

41, aqueous ballpoint pen as claimed in claim 40, it is characterized in that, the external diameter of aforementioned pearl body is more than the 0.1mm and not enough 0.3mm, the axially-displaceable momentum that aforementioned pearl body grips the pearl body in the hole is 3 μ m～18 μ m, and the exhausted amount of ink of Writing distance 0m～100m is more than the 8mg and not enough 60mg.

42, aqueous ballpoint pen as claimed in claim 39 is characterized in that, the axial overhang of aforementioned pearl body be the pearl body external diameter more than 15% and less than 25%.

43, a kind of aqueous ballpoint pen that uses the described ball-point pen tip of claim 4 for taking in water-base ink in inside, can discharging the structure of aforementioned ink by the front end of aforementioned ball-point pen tip, is characterized in that,

44, aqueous ballpoint pen as claimed in claim 43 is characterized in that, the exhausted amount of ink of Writing distance 0m～100m is not enough 60mg.

45, aqueous ballpoint pen as claimed in claim 44, it is characterized in that, the external diameter of aforementioned pearl body is more than the 0.1mm and not enough 0.3mm, the axially-displaceable momentum that aforementioned pearl body grips the pearl body in the hole is 3 μ m～18 μ m, and the exhausted amount of ink of Writing distance 0m～100m is more than the 8mg and not enough 60mg.

46, aqueous ballpoint pen as claimed in claim 43 is characterized in that, the axial overhang of aforementioned pearl body be the pearl body external diameter more than 15% and less than 25%.

47, a kind of ball-point pen tip; Near the front end of metal-made main body inner face is formed with pearl body supporting base; Take in the pearl body of the not enough 0.3mm of external diameter in the front side of aforementioned pearl body supporting base; The outer peripheral face internal modification of the apicule shape leading section by making aforementioned metal main body processed is circle-shaped; And be formed on the caulking part that has taper seat on the outer peripheral face; Between aforementioned pearl body supporting base and aforementioned caulking part, grip pivotally the pearl body is arranged; The part of pearl body is forwards outstanding from the front end of aforementioned caulking part; It is characterized in that

Its structure is that the wall thickness of the front end of aforementioned caulking part is set to below the 25 μ m, can make the caulking part internal modification with contacting of paper when writing.

48, ball-point pen tip as claimed in claim 7 is characterized in that, the axially-displaceable momentum that is held in the pearl body between pearl body supporting base and the caulking part is set to 3 μ m～18 μ m.

49, ball-point pen tip as claimed in claim 47 is characterized in that, from the front end of caulking part to the pearl body overhang in axial the place ahead be the pearl body diameter more than 15% and less than 25%.

50, ball-point pen tip as claimed in claim 47 is characterized in that, when drawing from imaginary line that the taper seat of the outer peripheral face of caulking part forwards prolongs, the pearl body is more outstanding unlike aforementioned imaginary line.

51, a kind of aqueous ballpoint pen, for in the pearl body of front end grips the hole, having the ball-point pen tip that grips the pearl body that the not enough 0.3mm of external diameter is arranged pivotally, take in water-base ink in inside, can discharging the structure of aforementioned ink by the front end of aforementioned ball-point pen tip, it is characterized in that

The axially-displaceable momentum that aforementioned pearl body grips the pearl body in the hole is below the 18 μ m.

52, aqueous ballpoint pen as claimed in claim 51 is characterized in that, the exhausted amount of ink of Writing distance 0m～100m is not enough 60mg.

53, aqueous ballpoint pen as claimed in claim 52, it is characterized in that, the external diameter of aforementioned pearl body is more than the 0.1mm and not enough 0.3mm, the axially-displaceable momentum that aforementioned pearl body grips the pearl body in the hole is 3 μ m～18 μ m, and the exhausted amount of ink of Writing distance 0m～100m is more than the 8mg and not enough 60mg.

54, aqueous ballpoint pen as claimed in claim 51 is characterized in that, the axial overhang of aforementioned pearl body be the pearl body external diameter more than 15% and less than 25%.