TWI698356B

TWI698356B - Ballpoint pen chip and writing utensil equipped with the ballpoint pen chip

Info

Publication number: TWI698356B
Application number: TW106109145A
Authority: TW
Inventors: 中村奈緒子; 土屋俊晃
Original assignee: 日商斑馬股份有限公司
Priority date: 2015-12-01
Filing date: 2017-03-20
Publication date: 2020-07-11
Also published as: CN107487108B; JP6847595B2; JP2017105161A; CN107487108A; TW201742760A

Abstract

本發明的課題在於提供一種能夠輕鬆地改變書寫線寬的原子筆頭及具備該原子筆頭的書寫用具。本發明的原子筆頭從後方側使轉印球珠(20)與筆頭本體(10)的內向環狀突起(11a1)接觸，並藉由承托構件(30)承托轉印球珠(20)的後半部側，承托構件(30)具有朝向前方而截面積逐漸縮小的縮小部(31)，縮小部(31)的最前端部配置於轉印球珠(20)的後方，比縮小部(31)更靠後側的部分以不能後退之方式固定於筆頭本體(10)，在筆頭本體(10)的內壁設有與縮小部(31)接近或接觸的彎曲抑制突起(15)。 The subject of the present invention is to provide a ballpoint pen that can easily change the writing line width and a writing instrument provided with the ballpoint pen. The ballpoint pen of the present invention brings the transfer ball (20) into contact with the inward annular protrusion (11a1) of the pen body (10) from the rear side, and the transfer ball (20) is supported by the supporting member (30) The supporting member (30) has a reduced section (31) whose cross-sectional area gradually decreases toward the front. The front end of the reduced section (31) is arranged behind the transfer ball (20), and is larger than the reduced section (31) The more rear part is fixed to the pen body (10) so as not to retreat, and the inner wall of the pen body (10) is provided with a bending restraining protrusion (15) that is close to or in contact with the reduced portion (31).

Description

原子筆頭及具備該原子筆頭的書寫用具 Ballpoint pen tip and writing utensil provided with the ballpoint pen tip

本發明係有關一種使書寫線的寬度發生變化的原子筆頭及具備該原子筆頭的書寫用具。 The present invention relates to a ballpoint pen that changes the width of a writing line and a writing instrument provided with the ballpoint pen.

以往，在這種書寫用具中，例如，如專利文獻1中所記載，具有調節從後方側承托球珠的棒狀延伸構件的相對位置的構件。依據該書寫用具，若藉由調節筆頭或前述棒狀延伸構件的旋入量、移動控制構件的旋轉量等來改變前述棒狀延伸構件的相對位置，則球珠與筆頭的小口內緣部之間的間隙發生變化，因此吐墨量亦發生變化，其結果，書寫線的寬度亦發生變化。 Conventionally, such a writing instrument, for example, as described in Patent Document 1, has a member for adjusting the relative position of a rod-shaped extension member that supports a ball from the rear side. According to this writing instrument, if the relative position of the rod-shaped extension member is changed by adjusting the screwing amount of the pen tip or the rod-shaped extension member, the rotation amount of the movement control member, etc., the ball and the inner edge of the small mouth of the pen tip The gap between them changes, so the ink ejection volume also changes. As a result, the width of the writing line also changes.

並且，作為其他以往技術，亦有藉由調節相對於被書寫面的筆頭的傾斜角度來改變線寬的技術(參照專利文獻2)。 Furthermore, as another conventional technique, there is also a technique of changing the line width by adjusting the inclination angle of the pen tip with respect to the surface to be written (see Patent Document 2).

【先行技術文獻】【Advanced Technical Literature】

【專利文獻】【Patent Literature】

專利文獻1：日本專利公開2004-1246號公報 Patent Document 1: Japanese Patent Publication No. 2004-1246

專利文獻2：日本專利公開2013-252654號公報 Patent Document 2: Japanese Patent Publication No. 2013-252654

然而，在專利文獻1的以往技術中，為了改變書寫線的寬度而需要調節前述棒狀延伸構件的相對位置，在其調節操作中費了工夫。並且，在專利文獻2的以往技術中，存在為了改變書寫用具的傾斜角度而導致書寫姿勢走形的情況。 However, in the prior art of Patent Document 1, in order to change the width of the writing line, it is necessary to adjust the relative position of the aforementioned rod-shaped extension member, which requires time and effort in the adjustment operation. In addition, in the prior art of Patent Document 2, there is a case where the writing posture is out of shape in order to change the inclination angle of the writing instrument.

鑑於這種問題，本發明具備以下結構。 In view of this problem, the present invention has the following structure.

一種原子筆頭，具備：向前後方向貫穿內部的大致筒狀的筆頭本體；收容於該筆頭本體內的前端側，並且使外周面前端側從前述筆頭本體朝向前方突出之轉印球珠；以及配置於比筆頭本體內的前述轉印球珠更靠後方側的承托構件，前述原子筆頭藉由前述承托構件的前端部承托前述轉印球珠的後半部側，該原子筆頭的特徵為，前述承托構件構成為在其前端側具有朝向前方而截面積逐漸縮小的縮小部，該縮小部的最前端部配置於前述轉印球珠的後方，並且比該縮小部更靠後側的部分以不能後退之方式固定於前述筆頭本體，且承受來自前述轉印球珠的按壓力時彈性收縮，在前述筆頭本體的內壁設有與前述縮小部的側壁接近或接觸而抑制前述縮小部的彎曲的彎曲抑制突起。 A ballpoint pen, comprising: a substantially cylindrical pen body penetrating the inside in the front and back direction; a transfer ball that is housed on the front end side of the pen body and has the outer peripheral surface protruding forward from the pen body; and arrangement In the supporting member on the rear side of the transfer ball in the pen body, the ballpoint pen supports the rear half of the transfer ball by the front end of the supporting member. The feature of the ballpoint pen is The supporting member is configured to have a reduced portion on the front end side of which the cross-sectional area gradually decreases toward the front, and the foremost end portion of the reduced portion is arranged behind the transfer ball, and is more rearward than the reduced portion The part is fixed to the pen body in a way that cannot be retreated, and elastically shrinks when receiving the pressing force from the transfer ball. The inner wall of the pen body is provided with the side wall of the reduction part close to or contact to suppress the reduction part The curved bend restrains the protrusion.

本發明以如上說明的方式構成，因此能夠輕鬆地改變書寫線寬。 The present invention is constructed in the manner described above, so the writing line width can be easily changed.

1、2、3、4、5‧‧‧原子筆頭 1, 2, 3, 4, 5‧‧‧ballpoint pen

10、10’‧‧‧筆頭本體 10, 10’‧‧‧The pen body

11‧‧‧球珠室 11‧‧‧Ball Room

11a‧‧‧圓筒狀內周面 11a‧‧‧Cylindrical inner peripheral surface

11a1‧‧‧內向環狀突起 11a1‧‧‧Inward annular protrusion

11b‧‧‧角筒狀內壁面 11b‧‧‧Angular cylindrical inner wall

12‧‧‧收縮部 12‧‧‧Constriction

15‧‧‧彎曲抑制突起 15‧‧‧Bending suppression protrusion

15a‧‧‧前端面 15a‧‧‧Front face

15b‧‧‧導墨槽 15b‧‧‧Ink guide

15c‧‧‧後端面 15c‧‧‧Back

15d‧‧‧突端面 15d‧‧‧Protruding end face

20‧‧‧轉印球珠 20‧‧‧transfer ball

30、50、60‧‧‧承托構件 30、50、60‧‧‧Supporting member

31、51a、61a‧‧‧縮小部 31, 51a, 61a‧‧‧Reduced part

32、52b、62a‧‧‧支撐突起 32, 52b, 62a‧‧‧Support protrusion

51、61‧‧‧前側構件 51、61‧‧‧Front side member

52、62‧‧‧後側構件 52, 62‧‧‧ Rear side member

100‧‧‧書寫用具(原子筆) 100‧‧‧writing utensils (ball pen)

120‧‧‧原子筆替芯 120‧‧‧ball pen refill

s1、s2‧‧‧間隙 s1, s2‧‧‧clearance

s3‧‧‧儲墨空間 s3‧‧‧Ink storage space

第1圖係表示本發明之原子筆頭的第1實施形態的縱剖面圖。 Fig. 1 is a longitudinal sectional view showing the first embodiment of the ballpoint pen of the present invention.

第2圖表示承托構件的一例，第2圖(a)係從前方觀察的圖，第2圖(b)係半剖面圖，第2圖(c)係從後方觀察的圖。 Fig. 2 shows an example of the supporting member, Fig. 2(a) is a view seen from the front, Fig. 2(b) is a half sectional view, and Fig. 2(c) is a view seen from the rear.

第3圖係沿第1圖的(III)-(III)線的剖面圖。 Figure 3 is a cross-sectional view taken along the line (III)-(III) of Figure 1.

第4圖係未鉚接前端部的狀態的筆頭本體的主要部分縱剖面圖。 Fig. 4 is a longitudinal cross-sectional view of the main part of the pen body in a state where the tip portion is not riveted.

第5圖係從前方側觀察未鉚接前端部的狀態的筆頭本體的圖。 Fig. 5 is a view of the pen tip body in a state where the tip portion is not riveted viewed from the front side.

第6圖係表示未鉚接前端部的狀態的筆頭本體的主要部分縱剖面的立體圖。 Fig. 6 is a perspective view showing a longitudinal section of the main part of the pen tip body in a state where the tip portion is not riveted.

第7圖係本發明之具備原子筆頭的書寫用具的縱剖面圖。 Figure 7 is a longitudinal sectional view of the writing instrument equipped with a ballpoint pen according to the present invention.

第8圖係表示本發明之具備原子筆頭的書寫用具的使用狀態的主要部分剖面圖。 Fig. 8 is a cross-sectional view of the main part showing the state of use of the writing instrument with a ballpoint pen according to the present invention.

第9圖係表示本發明之原子筆頭的第2實施形態的縱剖面圖。 Fig. 9 is a longitudinal sectional view showing the second embodiment of the ballpoint pen of the present invention.

第10圖係表示本發明之原子筆頭的第3實施形態的縱剖面圖。 Fig. 10 is a longitudinal sectional view showing the third embodiment of the ballpoint pen of the present invention.

第11圖中，第11圖(a)係沿第10圖的(a)-(a)線的剖面圖，第11圖(b)係沿第10圖的(b)-(b)線的剖面圖。 In Figure 11, Figure 11(a) is a cross-sectional view taken along line (a)-(a) of Figure 10, and Figure 11(b) is taken along line (b)-(b) of Figure 10 Sectional view.

第12圖係沿第10圖的(c)-(c)線的剖面圖。 Figure 12 is a cross-sectional view taken along the line (c)-(c) of Figure 10.

第13圖係表示第3實施形態的承托構件的前側構件的立體圖。 Fig. 13 is a perspective view showing the front side member of the receiving member according to the third embodiment.

第14圖係表示第3實施形態的承托構件的後側構件的立體圖。 Fig. 14 is a perspective view showing the rear side member of the receiving member of the third embodiment.

第15圖係表示本發明之原子筆頭的第4實施形態的縱剖面圖。 Fig. 15 is a longitudinal sectional view showing the fourth embodiment of the ballpoint pen of the present invention.

第16圖係沿第15圖的(XV)-(XV)線的剖面圖。 Figure 16 is a cross-sectional view taken along the line (XV)-(XV) of Figure 15.

第17圖係表示第4實施形態的承托構件的立體圖。 Fig. 17 is a perspective view showing the supporting member of the fourth embodiment.

第18圖係表示本發明之原子筆頭的第5實施形態的縱剖面圖。 Fig. 18 is a longitudinal sectional view showing the fifth embodiment of the ballpoint pen of the present invention.

第19圖係對第5實施形態省略轉印球珠並從前方觀察的放大圖。 Fig. 19 is an enlarged view of the fifth embodiment viewed from the front while omitting the transfer ball.

第20圖係第5實施形態的主要部分放大圖。 Figure 20 is an enlarged view of the main part of the fifth embodiment.

第21圖係沿第20圖的(XXI)-(XXI)線的剖面圖，第21圖(a)表示通常狀態，第21圖(b)表示藉由彎曲抑制突起承托朝向徑向彎曲的縮小部的狀態。 Figure 21 is a cross-sectional view taken along the line (XXI)-(XXI) of Figure 20. Figure 21 (a) shows the normal state, and Figure 21 (b) shows the radial bending of the protrusion support by the bending suppression The state of the reduced part.

本實施形態的第一特徵為，一種原子筆頭，具備：向前後方向貫穿內部的大致筒狀的筆頭本體；收容於該筆頭本體內的前端側，並且使外周面前端側從前述筆頭本體朝向前方突出之轉印球珠；以及配置於比筆頭本體內的前述轉印球珠更靠後方側的承托構件，前述原子筆頭藉由前述承托構件的前端部承托前述轉印球珠的後半部側，其中，前述承托構件在其前端側具有朝向前方而截面積逐漸縮小的縮小部，該縮小部的最前端部配置於前述轉印球珠的後方，並且比該縮小部更靠後側的部分以不能後退之方式固定於前述筆頭本體，且承受來自前述轉印球珠的按壓力時彈性收縮。 The first feature of the present embodiment is that a ballpoint pen is provided with: a substantially cylindrical pen body penetrating the inside in the front and rear directions; and is housed in the tip side of the pen body, and the outer peripheral surface of the tip side faces the front of the pen body A protruding transfer ball; and a support member arranged on the rear side of the transfer ball inside the pen body, and the ballpoint pen head supports the rear half of the transfer ball by the front end of the support member Part side, wherein the front end side of the supporting member has a reduced part whose cross-sectional area gradually decreases toward the front, and the most front end part of the reduced part is arranged behind the transfer ball, and is further behind the reduced part The side part is fixed to the pen head body in a manner that cannot be retreated, and elastically contracts when receiving the pressing force from the transfer ball.

依據前述結構，藉由縮小部防止承托構件的前端側朝向徑向彎曲，能夠穩定地得到與按壓力相應的粗細的書寫線。 According to the aforementioned structure, the reduced portion prevents the front end side of the receiving member from bending in the radial direction, so that a writing line of a thickness corresponding to the pressing force can be stably obtained.

另外，前述“縮小部”不包含螺旋彈簧。 In addition, the aforementioned "reduced portion" does not include a coil spring.

作為第二特徵，為了更有效地抑制承托構件的前端側朝向徑向彎曲，將前述縮小部形成為從前述承托構件的最前端部朝向後方而截面積連續擴大的實心狀。 As a second feature, in order to more effectively suppress the front end side of the receiving member from bending in the radial direction, the reduced portion is formed in a solid shape whose cross-sectional area continuously expands from the most front end of the receiving member toward the rear.

在此，前述“實心狀”表示內部不具有中空部的形狀。 Here, the aforementioned “solid shape” means a shape that does not have a hollow portion inside.

並且，作為前述縮小部的具體例，可舉出圓錐台形狀的方式、棱錐台形狀的方式等。 In addition, as a specific example of the aforementioned reduced portion, a form of a truncated cone shape, a form of a pyramid shape, and the like can be given.

作為第三特徵，為了能夠在筆頭本體內充分確保墨水流通流路且設為製造性良好的方式，前述承托構件在比前述縮小部更後側，沿周向隔開間隔具有複數個朝向徑外方向突出之支撐突起，並使這些支撐突起壓接於筆頭本體的內壁面且以不能後退之方式被固定。 As a third feature, in order to be able to sufficiently ensure the ink flow path in the pen body and to provide a method with good manufacturability, the supporting member has a plurality of directional diameters at intervals in the circumferential direction on the rear side of the reduced portion. The supporting protrusions protruding in the outer direction are pressed against the inner wall surface of the pen body and fixed in a manner that cannot be retreated.

作為第四特徵，將前述承托構件由一種合成樹脂材料形成為一體，以得到柔軟的書寫感。(參照第1圖及第9圖)。 As a fourth feature, the aforementioned supporting member is integrally formed of a synthetic resin material to obtain a soft writing feeling. (Refer to Figure 1 and Figure 9).

作為第五特徵，為了使前述承托構件有效地彈性變形，並且提高生產率，由具有前述縮小部的前側構件及具有前述支撐突起的後側構件這兩個構件構成了前述承托構件。(參照第10圖及第15圖)。 As a fifth feature, in order to effectively elastically deform the receiving member and improve productivity, the receiving member is composed of two members, the front member having the reduced portion and the rear member having the supporting protrusion. (Refer to Figure 10 and Figure 15).

作為第六特徵，為了提高質量及生產率，由比前述前側構件耐磨性更高的材料形成了前述後側構件。 As a sixth feature, in order to improve quality and productivity, the rear side member is formed of a material with higher wear resistance than the front side member.

作為第七特徵，為了使前述承托構件更有效地彈性變形而輕鬆地調整線寬，由比前述後側構件更容易彈性變形的材料形成了前述前側構件。 As a seventh feature, in order to make the support member elastically deform more effectively and easily adjust the line width, the front side member is formed of a material that is easier to elastically deform than the rear side member.

作為第八特徵，為了使前述承托構件更有效地彈性變形，並且提高生產率，將前述前側構件在與前述筆頭本體的內周面鬆弛嵌合的狀態下設置在前述轉印球珠與前述後側構件之間。 As an eighth feature, in order to more effectively deform the supporting member and improve productivity, the front side member is provided on the transfer ball and the rear surface in a loosely fitted state with the inner peripheral surface of the pen body. Between the side members.

作為第九特徵，為了減輕筆頭本體內的墨水的流通阻力，前述前側構件中，在比前述縮小部更靠後側的外周部，沿周向隔開間隔設有複數個遍及前後方向的縱肋，且設為這些縱肋的數量與前述支撐突起的數量不同(參照第12圖)。 As a ninth feature, in order to reduce the flow resistance of the ink in the pen body, in the front side member, a plurality of longitudinal ribs extending in the front and rear directions are provided on the outer peripheral portion of the front side member on the rear side than the reduced portion in the circumferential direction. , And set the number of these longitudinal ribs to the number of the aforementioned supporting protrusions The amount is different (refer to Figure 12).

第十特徵為，作為生產率良好的較佳方式，連結前述前側構件和前述後側構件並一體化(參照第15圖)。 The tenth feature is that, as a preferred method for good productivity, the front side member and the rear side member are connected and integrated (refer to FIG. 15).

第十一特徵為，為了防止前述縮小部朝向徑外方向彎曲，在前述筆頭本體的內壁設置了與前述縮小部的側壁接近或接觸而抑制前述縮小部的彎曲的彎曲抑制突起(參照第18圖~第21圖)。 The eleventh feature is that in order to prevent the reduced portion from bending in the radially outward direction, the inner wall of the pen body is provided with a bend suppressing protrusion that is close to or in contact with the side wall of the reduced portion to suppress the bending of the reduced portion (refer to No. 18 Figure ~ Figure 21).

第十二特徵為，為了使墨水流量穩定，前述彎曲抑制突起沿周向隔開間隔設有複數個，沿周向相鄰的前述彎曲抑制突起之間成為向前後方向連通的導墨槽(參照第19圖及第20圖)。 The twelfth feature is that in order to stabilize the ink flow rate, the bending suppression protrusions are provided in plural at intervals in the circumferential direction, and the bending suppression protrusions adjacent in the circumferential direction are formed as ink guide grooves communicating in the forward and backward directions (see 19 Figure and Figure 20).

第十三特徵為，為了使墨水流量更穩定，在筆頭本體內的前端側設有藉由前端面承托後退時的前述轉印球珠的收縮部，前述彎曲抑制突起配置於比前述收縮部的前端面更靠後方側。 The thirteenth feature is that, in order to make the ink flow more stable, the tip side of the pen body is provided with a contraction portion of the transfer ball when the tip surface is supported and retracted. The front face is closer to the rear side.

作為第十四特徵，前述收縮部以使承托的前述轉印球珠從前述筆頭本體的前端朝向前方突出之方式，其前後位置被設定。(參照第20圖) As a fourteenth feature, the front-rear position of the contraction portion is set such that the transferred ball that is supported protrudes forward from the front end of the pen body. (Refer to Figure 20)

第十五特徵為，尤其為了有效地防止墨水泄露，在前述縮小部的周圍以環狀配置螺旋彈簧，使該螺旋彈簧的前端部抵接於前述轉印球珠，並且以不能後退之方式支撐該螺旋彈簧的後端部(參照第9圖)。 The fifteenth feature is that, especially in order to effectively prevent ink leakage, a coil spring is arranged in a ring around the reduced portion, and the front end of the coil spring is abutted against the transfer ball, and is supported so as not to retreat. The rear end of the coil spring (refer to Figure 9).

第十六特徵為，為了在筆頭本體內充分確保墨水流通流路且提高質量及生產率，在前述筆頭本體內的前端側形成角筒狀內壁面，且設成了使該角筒狀內壁面與前述轉印球珠的外周面接近或接觸(參照第3圖)。 The sixteenth feature is that, in order to fully ensure the ink flow path in the pen body and improve quality and productivity, a square cylindrical inner wall surface is formed on the tip side of the pen body, and the square cylindrical inner wall surface is arranged so that The outer peripheral surface of the transfer ball is close to or in contact (refer to Fig. 3).

第十七特徵為，具備上述原子筆頭而構成了書寫用具(參照第7圖)。 The seventeenth feature is that it is equipped with the above-mentioned ball pen tip to constitute a writing instrument (refer Figure 7).

接著，依據圖示對具有上述特徵的具體的實施形態進行詳細說明。 Next, specific embodiments having the above-mentioned characteristics will be described in detail based on the drawings.

另外，在本說明書中，“前方”表示原子筆頭的前端方向，“後方”表示其相反方向。並且，“徑外方向”表示在原子筆頭的徑向中，從中心部分開的方向，“徑內方向”表示其相反方向。 In addition, in this specification, "front" means the tip direction of the ballpoint pen tip, and "rear" means the opposite direction. In addition, the "diameter outer direction" means a direction away from the center part in the radial direction of the ballpoint pen tip, and the "diameter inner direction" means the opposite direction.

<第1實施形態> <First Embodiment>

第1圖表示本發明之原子筆頭1。 Figure 1 shows the ballpoint pen 1 of the present invention.

原子筆頭1具備：向前後方向貫穿內部的大致筒狀的筆頭本體10、收容於該筆頭本體10內的前端側，並且使外周面前端側從筆頭本體10的前端朝向前方突出之轉印球珠20以及配置於比筆頭本體10內的轉印球珠20更靠後方側的承托構件30。 The ballpoint pen 1 is provided with: a substantially cylindrical pen body 10 penetrating the inside in the front and rear directions, and a transfer ball that is housed in the tip of the pen body 10 and protrudes forward from the tip of the pen body 10 on the outer peripheral surface. 20 and a supporting member 30 arranged on the rear side of the transfer ball 20 in the pen body 10.

該原子筆頭1從其後方側使轉印球珠20的前半部側抵接於筆頭本體10內的前端側的內向環狀突起11a1，並且在初始狀態下不藉由筆頭本體10的內表面承托而藉由大致棒狀的承托構件30的前端部承托轉印球珠20的後半部側。 This ballpoint pen 1 has the front half side of the transfer ball 20 abutting the inward annular protrusion 11a1 on the tip side in the pen body 10 from its rear side, and does not support the inner surface of the pen body 10 in the initial state. The support member 30 supports the rear half side of the transfer ball 20 by the front end of the support member 30 having a substantially rod shape.

並且，該原子筆頭1將筆頭本體10的前端側的內壁面形成為角筒狀，使轉印球珠20的外周面與該角筒狀內壁面11b接近或接觸。 In addition, in the ballpoint pen 1, the inner wall surface on the tip side of the pen body 10 is formed into a rectangular tube shape, and the outer peripheral surface of the transfer ball 20 is close to or in contact with the rectangular tube inner wall surface 11 b.

筆頭本體10例如由不銹鋼、黃銅或鋅白銅等的合金或者合成樹脂形成為前端側具有尖細的圓錐狀的部分的大致筒狀。 The pen body 10 is formed of, for example, an alloy such as stainless steel, brass, zinc cupronickel, or a synthetic resin into a substantially cylindrical shape having a tapered conical portion on the tip side.

在該筆頭本體10內，從前端部側依次設有球珠室11、收縮部12、前窄孔13及大徑孔14，它們的內部空間沿前後方向連通。 In the pen body 10, a ball chamber 11, a constriction 12, a front narrow hole 13, and a large diameter hole 14 are sequentially provided from the front end side, and their internal spaces communicate in the front-rear direction.

球珠室11藉由偏靠最前端的內向環狀突起11a1、從該內向環狀突起11a1朝向後方延伸的角筒狀內壁面11b及收縮部12的前端面構成旋轉自如地收容轉印球珠20的空間。 The ball chamber 11 is composed of an inward annular protrusion 11a1 at the foremost end, an angular cylindrical inner wall surface 11b extending rearward from the inward annular protrusion 11a1, and a front end surface of the constriction 12 to rotatably accommodate the transfer balls 20 space.

在轉印球珠20被***於球珠室11內之後，筆頭本體10的前端部從外部被鉚接，從而形成內向環狀突起11a1。 After the transfer ball 20 is inserted into the ball chamber 11, the front end portion of the pen body 10 is riveted from the outside, thereby forming an inward annular protrusion 11a1.

亦即，如第4圖所示，在轉印球珠20被***之前的階段，在球珠室11的偏靠最前端形成圓筒狀內周面11a。在轉印球珠20被***於球珠室11之後，圓筒狀內周面11a的周壁從外部被鉚接，從而在圓筒狀內周面11a的前端側形成內向環狀突起11a1。內向環狀突起11a1以從圓筒狀內周面11a朝向徑內方向突出之方式，與轉印球珠20的前半部接觸。 That is, as shown in FIG. 4, at a stage before the transfer ball 20 is inserted, a cylindrical inner peripheral surface 11a is formed at the deviated foremost end of the ball chamber 11. After the transfer ball 20 is inserted into the ball chamber 11, the peripheral wall of the cylindrical inner peripheral surface 11a is riveted from the outside, thereby forming an inward annular protrusion 11a1 on the front end side of the cylindrical inner peripheral surface 11a. The inward annular protrusion 11a1 is in contact with the front half of the transfer ball 20 so as to protrude in the radial direction from the cylindrical inner peripheral surface 11a.

角筒狀內壁面11b為正多邊形筒狀(依據圖示例，為正九邊形筒狀)的內壁面。構成該角筒狀內壁面11b的各面形成為平坦面狀。並且，在構成角筒狀內壁面11b的複數個面中，沿周向相鄰的面之間形成有內角狀部分11c。 The angular cylindrical inner wall surface 11b is an inner wall surface of a regular polygonal cylindrical shape (a regular nine-sided cylindrical shape according to the illustrated example). Each surface constituting the angular cylindrical inner wall surface 11b is formed in a flat surface shape. In addition, among the plural surfaces constituting the angular cylindrical inner wall surface 11b, an inner angular portion 11c is formed between the surfaces adjacent in the circumferential direction.

並且，收縮部12為將比角筒狀內壁面11b更靠後側的部分縮徑為比角筒狀內壁面11b的最小徑更小的內徑，從而形成為大致收縮狀(或朝向徑內方向突出之環狀突起狀)的部分(參照第1圖及第4圖)。貫穿該收縮部12的孔的內周面為大致圓筒狀的面，在該面中，形成有向前後方向貫穿的導墨槽12a(參照第5圖)。導墨槽12a以適當地確保墨水流通量的方式，其流通截面積被設定。 In addition, the constricted portion 12 reduces the diameter of the portion on the rear side of the angular cylindrical inner wall surface 11b to an inner diameter smaller than the smallest diameter of the angular cylindrical inner wall surface 11b, and is formed into a substantially contracted shape (or toward the inner diameter). (See Fig. 1 and Fig. 4). The inner peripheral surface of the hole penetrating the constricted portion 12 is a substantially cylindrical surface, and the ink guide groove 12a (refer to FIG. 5) penetrating in the front and rear direction is formed on this surface. The flow cross-sectional area of the ink guide groove 12a is set to appropriately ensure the flow of ink.

前述結構的收縮部12以不朝向後方插通轉印球珠20的方式，被設定成比轉印球珠20的外徑更小的內徑。 The constricted portion 12 of the aforementioned structure is set to have an inner diameter smaller than the outer diameter of the transfer ball 20 so as not to penetrate the transfer ball 20 toward the rear.

另外，作為圖示例以外的其他例，亦可設為省略收縮部12而將角筒狀內壁面11b連接在前窄孔13的前端側的形狀。 In addition, as another example other than the illustrated example, a shape in which the constricted portion 12 is omitted and the angular cylindrical inner wall surface 11b is connected to the front end side of the front narrow hole 13 may be adopted.

在收縮部12的後方側設置有前窄孔13。 A front narrow hole 13 is provided on the rear side of the constriction 12.

前窄孔13為朝向前方連續縮徑的大致圓錐台狀的孔，且收容後述的承托構件30的縮小部31，並且將該縮小部31的周圍的空間作為墨水流通路徑。在該前窄孔13的後端側連續有大徑孔14。 The front narrow hole 13 is a substantially truncated cone-shaped hole continuously reduced in diameter toward the front, and accommodates the reduced portion 31 of the supporting member 30 described later, and the space around the reduced portion 31 serves as an ink flow path. A large diameter hole 14 is continuously formed on the rear end side of the front narrow hole 13.

大徑孔14形成為從前窄孔13的後端朝向後方連續的大致圓筒狀。在該大徑孔14中***有承托構件30，在大徑孔14的內壁面壓接固定有承托構件30的後部側的複數個支撐突起32。 The large-diameter hole 14 is formed in a substantially cylindrical shape continuous from the rear end of the front narrow hole 13 toward the rear. A supporting member 30 is inserted into the large-diameter hole 14, and a plurality of support protrusions 32 on the rear side of the supporting member 30 are crimped and fixed to the inner wall surface of the large-diameter hole 14.

該大徑孔14使用逐步縮徑的複數個鑽頭，形成朝向前方逐步縮徑的孔之後，藉由鉸刀加工等精加工被加工成向前後方向連續的同徑的孔。另外，作為圖示例以外的其他例，亦可設為省略前述精加工而使大徑孔14朝向前方逐步縮徑的孔。 The large-diameter hole 14 uses a plurality of drills that gradually reduce the diameter to form a hole that gradually reduces the diameter toward the front, and then is processed into a continuous hole of the same diameter in the forward and backward directions by finishing machining such as reamer processing. In addition, as an example other than the example shown in the figure, the aforementioned finishing process may be omitted, and the large-diameter hole 14 may be gradually reduced in diameter toward the front.

並且，轉印球珠20例如由以碳化鎢或碳化矽等為主要成分的燒結體等的硬質金屬材料、或者合成樹脂材料形成為球狀，並被收容於球珠室11內。 In addition, the transfer ball 20 is formed of a hard metal material such as a sintered body mainly composed of tungsten carbide, silicon carbide, or the like, or a synthetic resin material in a spherical shape, and is housed in the ball chamber 11.

該轉印球珠20的前半部側被按壓在球珠室11內前端側的內向環狀突起11a1。並且，轉印球珠20的後半部側沒有被作為筆頭本體10的內表面的收縮部12的前端面承托，而是僅藉由承托構件30的前端面被承托。亦即，在收縮部12的前端面與轉印球珠20的後半部側之間確保了間隙(參照第1圖)，承托構件30的前端面抵接於轉印球珠20的後端面。 The front half side of the transfer ball 20 is pressed against the inward annular protrusion 11a1 on the front end side in the ball chamber 11. In addition, the rear half side of the transfer ball 20 is not supported by the front end surface of the constricted portion 12 as the inner surface of the pen body 10, but is supported only by the front end surface of the supporting member 30. That is, a gap is ensured between the front end surface of the constriction 12 and the rear half side of the transfer ball 20 (refer to Figure 1), and the front end surface of the support member 30 abuts against the rear end surface of the transfer ball 20 .

另外，在以通常的筆壓進行書寫的情況下，轉印球珠20維持不被筆頭本體10的內表面承托而藉由大致棒狀的承托構件30的前端部承托的狀態(參照第8圖)，但在由於筆壓過強等，承受了朝向後方的較強的按壓力的情況下，亦有與筆頭本體10內表面的收縮部12接觸的情況。 In addition, in the case of writing with a normal pen pressure, the transfer ball 20 remains The state where the inner surface of the main body 10 is supported by the front end of the substantially rod-shaped supporting member 30 (refer to Figure 8), but due to excessive pen pressure, etc., it has received a strong pressing toward the rear In the case of pressure, it may come into contact with the constriction 12 on the inner surface of the pen body 10.

該轉印球珠20的外徑被設定為比與球珠室11的角筒狀內壁面11b接觸的假想的球體稍微小的外徑。因此，轉印球珠20的外周面接近構成角筒狀內壁面11b的各面(參照第3圖)。 The outer diameter of the transfer ball 20 is set to be slightly smaller than the outer diameter of the virtual ball contacting the angular cylindrical inner wall surface 11 b of the ball chamber 11. Therefore, the outer peripheral surface of the transfer ball 20 approaches each surface constituting the angular cylindrical inner wall surface 11b (see FIG. 3).

另外，因球珠室11內表面的尺寸精度的偏差等，亦有轉印球珠20相對於筆頭本體10的中心稍微偏心的情況，在這種情況下，該轉印球珠20的外周面與構成角筒狀內壁面11b的面接觸。 In addition, due to the deviation of the dimensional accuracy of the inner surface of the ball chamber 11, etc., the transfer ball 20 may be slightly eccentric with respect to the center of the pen body 10, in this case, the outer peripheral surface of the transfer ball 20 It is in contact with the surface constituting the angular cylindrical inner wall surface 11b.

並且，如第3圖所示，在轉印球珠20的周圍，角筒狀內壁面11b中相鄰的平坦面部之間形成有內角狀部分11c。該內角狀部分11c確保成為墨水流通路徑的間隙s1。 In addition, as shown in FIG. 3, around the transfer ball 20, an inner corner portion 11c is formed between adjacent flat surface portions of the corner cylindrical inner wall surface 11b. This inner corner portion 11c secures a gap s1 that becomes an ink flow path.

並且，承托構件30中，在其前端側具有朝向前方截面積逐漸縮小的縮小部31，將該縮小部31的最前端部配置在轉印球珠20的後方。並且，承托構件30在比縮小部31更後側，沿周向隔開間隔具有朝向徑外方向突出之複數個(依據圖示例，為三個)支撐突起32，藉由使這些支撐突起32壓接於筆頭本體10的內壁面而以不能進退的方式被固定。 In addition, the receiving member 30 has a reduced portion 31 whose cross-sectional area gradually decreases toward the front end side, and the most distal end portion of the reduced portion 31 is arranged behind the transfer ball 20. In addition, the supporting member 30 has a plurality of (three according to the example of the figure) supporting protrusions 32 protruding radially outward at intervals in the circumferential direction on the rear side than the reduced portion 31, and these supporting protrusions 32 is pressed against the inner wall surface of the pen body 10 to be fixed so as not to advance or retreat.

該承托構件30由POM(聚甲醛)、PE(聚乙烯)及PP(聚丙烯)等能夠彈性變形的一種硬質合成樹脂材料一體形成為棒狀，藉由從轉印球珠20承受的按壓力而彈性收縮。 The supporting member 30 is made of a rigid synthetic resin material that can be elastically deformed, such as POM (polyoxymethylene), PE (polyethylene), and PP (polypropylene), and is integrally formed into a rod shape, and is pressed by the transfer ball 20 Elastic contraction under pressure.

縮小部31形成為從與轉印球珠20的接觸面朝向後方而外徑連續擴大的圓錐台狀。 The reduced portion 31 is formed in a truncated cone shape whose outer diameter continuously expands from the contact surface with the transfer ball 20 toward the rear.

如第2圖所示，支撐突起32以大致放射狀突出並設有複數個(依據圖示例，為三個)。這些複數個支撐突起32在該原子筆頭1的製造階段，當承托構件30從筆頭本體10的後方側朝向筆頭本體10內***時，壓接於筆頭本體10的內周面。 As shown in FIG. 2, the supporting protrusions 32 protrude in a substantially radial shape and are provided with a plurality of (three according to the illustrated example). These plural supporting protrusions 32 are pressed against the inner peripheral surface of the pen body 10 when the supporting member 30 is inserted into the pen body 10 from the rear side of the pen body 10 in the manufacturing stage of the ball pen tip 1.

第2圖中，符號32a為使前述***作業變得容易的錐面，各錐面32a形成於各支撐突起32的前端側。 In FIG. 2, reference numeral 32 a denotes a tapered surface that facilitates the aforementioned insertion operation, and each tapered surface 32 a is formed on the tip side of each support protrusion 32.

並且，在沿周向相鄰的支撐突起32、32之間的空間作為墨水流通流路發揮作用。 In addition, the space between the support protrusions 32 and 32 adjacent in the circumferential direction functions as an ink flow path.

接著，對使用了上述結構的原子筆頭1的書寫用具100進行說明(參照第7圖)。 Next, the writing instrument 100 using the ballpoint pen 1 of the above-mentioned structure is demonstrated (refer FIG. 7).

書寫用具100為藉由頂出部140的按壓操作使原子筆替芯120前端的原子筆頭1從軸筒110前端突出，並藉由使卡子111朝向軸筒中心側彎曲的操作而解除該突出狀態的伸縮式的原子筆。 In the writing instrument 100, the ballpoint pen tip 1 at the tip of the ballpoint pen refill 120 protrudes from the tip of the barrel 110 by pressing the ejection portion 140, and the protruding state is released by the operation of bending the clip 111 toward the center of the barrel 110 Retractable ball pen.

原子筆替芯120將原子筆頭1連接在墨水收容管121的前端，並在它們的內部填充墨水而成。 The ballpoint pen refill 120 is formed by connecting the ballpoint pen tip 1 to the front end of the ink containing tube 121, and filling the inside of them with ink.

接著，對基於上述結構的原子筆頭1及書寫用具100(原子筆)的書寫時的作用效果進行說明。 Next, the effect of the ball pen tip 1 and writing instrument 100 (ball pen) based on the above-mentioned structure at the time of writing will be described.

如第8圖所示，若將轉印球珠20的前端側按壓在被書寫面等而朝向後方的按壓力施加於轉印球珠20，則承托構件30朝向軸向彈性收縮，轉印球珠20稍微後退。因此，轉印球珠20與內向環狀突起11a1之間形成間隙，墨水從該間隙吐出。並且，若前述按壓力變小，則承托構件30恢復原來的長度，轉印球珠20前進而前述間隙變窄。 As shown in Figure 8, if the front end side of the transfer ball 20 is pressed against the writing surface or the like and a pressing force toward the back is applied to the transfer ball 20, the support member 30 elastically contracts in the axial direction, and the transfer The ball 20 retreats slightly. Therefore, a gap is formed between the transfer ball 20 and the inward annular protrusion 11a1, and ink is ejected from the gap. In addition, if the pressing force becomes smaller, the receiving member 30 returns to its original length, the transfer ball 20 advances, and the gap becomes narrow.

因此，在前述按壓力比較大的情況下，承托構件30的收縮量及轉印球珠20的後退量變大，轉印球珠20與內向環狀突起11a1之間的間隙變寬，因此墨水吐出量增加而書寫線變粗。 Therefore, when the aforementioned pressing force is relatively large, the amount of contraction of the supporting member 30 and the amount of retreat of the transfer ball 20 become larger, and the gap between the transfer ball 20 and the inward annular protrusion 11a1 becomes wider, so the ink The discharge amount increases and the writing line becomes thicker.

並且，在前述按壓力比較小的情況下，承托構件30的收縮量及轉印球珠20的後退量變小，轉印球珠20與內向環狀突起11a1之間的間隙變窄，因此墨水吐出量減少而書寫線變細。 In addition, when the aforementioned pressing force is relatively small, the amount of contraction of the support member 30 and the amount of retreat of the transfer ball 20 become smaller, and the gap between the transfer ball 20 and the inward annular protrusion 11a1 becomes narrow, so the ink The discharge amount decreases and the writing line becomes thinner.

在通常的書寫姿勢下進行書寫的情況下，因其書寫時的書寫角度等，有時在承托構件30的前端側，相對於該承托構件30的中心線的方向承受傾斜的方向的按壓力(參照第8圖)。 In the case of writing in a normal writing posture, due to the writing angle during writing, etc., the tip side of the supporting member 30 may be pressed in an oblique direction with respect to the direction of the center line of the supporting member 30. Pressure (refer to Figure 8).

依據本實施例的原子筆頭1，在承托構件30的前端側具有朝向前方截面積逐漸縮小的縮小部31，因此即使在承受如上述傾斜的方向的按壓力的情況下，承托構件30的前端側亦不易朝向徑向彎曲而朝向軸向彈性收縮。 According to the ballpoint pen head 1 of the present embodiment, the front end side of the supporting member 30 has a reduced section 31 whose cross-sectional area gradually decreases toward the front. Therefore, even when the pressure of the supporting member 30 is The front end side is also hard to bend in the radial direction and elastically contract in the axial direction.

亦即，假設在將承托構件30的前端側形成為筆直的棒狀的情況下，該前端側部分朝向徑向彎曲而從轉印球珠20的中心偏移，從而有可能轉印球珠20的後退量變得不穩定，墨水吐出量及書寫線的粗細亦變得不穩定，但依據本發明，能夠防止這種情況而穩定地得到與按壓力相應的粗細的書寫線。 That is, assuming that the front end side of the receiving member 30 is formed into a straight rod shape, the front end side portion is bent in the radial direction and shifted from the center of the transfer ball 20, so that it is possible to transfer the ball The retreat amount of 20 becomes unstable, and the ink ejection amount and the thickness of the writing line also become unstable. However, according to the present invention, this can be prevented and a writing line of a thickness corresponding to the pressing force can be stably obtained.

並且，在轉印球珠20的周圍，藉由角筒狀內壁面11b中的內角狀部分11c而確保了間隙s1，因此該間隙s1成為墨水流通流路而穩定地維持墨水流量。 In addition, around the transfer ball 20, a gap s1 is secured by the inner corner portion 11c in the corner cylindrical inner wall surface 11b. Therefore, the gap s1 serves as an ink flow path to stably maintain the ink flow rate.

而且，轉印球珠20的外周面與構成角筒狀內壁面11b的平坦面點接觸，因此與設為例如使轉印球珠的外周面與圓筒狀的面接觸的以往技術等進行比較，能夠將轉印球珠20的旋轉阻力設為較小。 In addition, the outer peripheral surface of the transfer ball 20 is in point contact with the flat surface constituting the angular cylindrical inner wall surface 11b, so it is set to contact the outer peripheral surface of the transfer ball with the cylindrical surface, for example. In comparison with technology and the like, the rotation resistance of the transfer ball 20 can be made smaller.

接著，對本發明之原子筆頭的其他例進行說明。 Next, other examples of the ballpoint pen of the present invention will be described.

另外，由於以下所示之原子筆頭為對上述原子筆頭1進行了部分變更的原子筆頭，因此主要對其變更部分進行詳細說明，省略重複的詳細說明。 In addition, since the ballpoint pen tip shown below is a ballpoint pen tip that is partially modified from the above-mentioned ballpoint pen tip 1, the modified part will be mainly described in detail, and repeated detailed description will be omitted.

<第2實施形態> <Second Embodiment>

第9圖所示之原子筆頭2成為對上述原子筆頭1追加了螺旋彈簧40的結構。 The ballpoint pen 2 shown in FIG. 9 has a structure in which a coil spring 40 is added to the ballpoint pen 1 described above.

若進行詳細說明，則該原子筆頭2在承托構件30的縮小部31的周圍以環狀配置螺旋彈簧40，且使該螺旋彈簧40的前端部抵接於轉印球珠20，並且藉由縮小部31後端側的階梯部以不能後退之方式支撐該螺旋彈簧40的後端部，在轉印球珠20的後端與縮小部31的前端之間確保了間隙s2。 In detail, the ballpoint pen tip 2 is provided with a coil spring 40 in a ring shape around the reduced portion 31 of the supporting member 30, and the tip portion of the coil spring 40 is brought into contact with the transfer ball 20, and The stepped portion on the rear end side of the reduced portion 31 supports the rear end of the coil spring 40 so as not to retreat, and a gap s2 is secured between the rear end of the transfer ball 20 and the front end of the reduced portion 31.

依據前述結構的原子筆頭2，在朝向後方的按壓力未施加於轉印球珠20的未使用狀態下，藉由螺旋彈簧40的彈性力將轉印球珠20壓接於內向環狀突起11a1，從而能夠有效地防止墨水從轉印球珠20與內向環狀突起11a1之間泄露。 According to the ballpoint pen head 2 of the foregoing structure, in the unused state where the pressing force toward the rear is not applied to the transfer ball 20, the transfer ball 20 is pressed against the inward annular protrusion 11a1 by the elastic force of the coil spring 40 Therefore, it is possible to effectively prevent the ink from leaking between the transfer ball 20 and the inward annular protrusion 11a1.

並且，在將轉印球珠20按壓在被書寫面時，由於轉印球珠20稍微後退，因此在轉印球珠20與內向環狀突起11a1之間產生間隙，墨水從該間隙吐出。 In addition, when the transfer ball 20 is pressed against the writing surface, the transfer ball 20 recedes slightly, so a gap is generated between the transfer ball 20 and the inward annular protrusion 11a1, and ink is ejected from the gap.

並且，在對轉印球珠20的按壓力比較大的情況下，由於轉印球珠20的後端面抵接於承托構件30前端面而承托構件30彈性收縮，因此轉印球珠20與內向環狀突起11a1之間的間隙變大，基於該間隙的墨水流量增加，書寫線變粗。另外，在由合成樹脂材料形成了轉印球珠20的情況下，不僅承托構件30收縮，該轉印球珠20亦容易收縮，因此能夠進一步增加墨水流量。 In addition, when the pressing force against the transfer ball 20 is relatively large, since the rear end surface of the transfer ball 20 abuts on the front end surface of the receiving member 30 and the receiving member 30 elastically contracts, the transfer ball 20 The gap with the inward annular protrusion 11a1 becomes larger, the ink flow rate based on the gap increases, and the writing line becomes thicker. In addition, when the transfer ball 20 is formed of a synthetic resin material, not only the supporting member 30 shrinks, but the transfer ball 20 easily shrinks, so that the ink flow rate can be further increased.

藉此，在該原子筆頭2中亦與上述原子筆頭1同樣地、可用作書寫用具100(原子筆)的組件，並能夠在書寫時穩定地得到與按壓力相應的粗細的書寫線。 Thereby, the ballpoint pen 2 can also be used as a component of the writing instrument 100 (ballpoint pen) similarly to the ballpoint pen 1 described above, and it is possible to stably obtain a writing line having a thickness corresponding to the pressing force during writing.

該原子筆頭2與上述原子筆頭1同樣地、可用作書寫用具100(原子筆)的組件。 This ballpoint pen 2 can be used as a component of the writing instrument 100 (ballpoint pen) in the same way as the ballpoint pen 1 described above.

<第3實施形態> <The third embodiment>

第10圖所示之原子筆頭3為對上述原子筆頭1將承托構件30替換為承托構件50的原子筆頭。 The ballpoint pen tip 3 shown in FIG. 10 is a ballpoint pen tip obtained by replacing the supporting member 30 with the supporting member 50 for the above-mentioned ballpoint pen tip 1.

承托構件50使具有縮小部51a的前側構件51及具有支撐突起52b的後側構件52這兩個構件沿前後方向抵接。 The receiving member 50 abuts two members of the front side member 51 having the reduced portion 51a and the rear side member 52 having the supporting protrusion 52b in the front-rear direction.

前側構件51在其前端側具有與上述縮小部31大致相同形狀的圓錐台形狀的縮小部51a，並使該縮小部51a的最前端部與轉印球珠20的後端接觸。 The front-side member 51 has a truncated cone-shaped reduced portion 51 a approximately the same shape as the aforementioned reduced portion 31 on its front end side, and the foremost portion of the reduced portion 51 a is brought into contact with the rear end of the transfer ball 20.

並且，前側構件51在比縮小部51a更靠後側的軸狀部分的外周部，沿周向隔開等間隔配設複數個(依據圖示例，為三個)遍及前後方向的縱肋51b。 In addition, in the front side member 51, a plurality of (three according to the example in the figure) longitudinal ribs 51b in the front-rear direction are arranged at equal intervals in the circumferential direction on the outer peripheral portion of the shaft-shaped portion on the rear side than the reduced portion 51a. .

縱肋51b在比前側構件51中的縮小部51a更後側，在與筆頭本體10的內周面鬆弛嵌合的狀態下，以向前後方向連續的方式形成。在該縱肋51b的前端側形成朝向軸芯側傾斜的錐面51b1。 The longitudinal rib 51b is formed on the rear side of the reduced portion 51a in the front side member 51 in a state of loosely fitting with the inner peripheral surface of the pen body 10, and is formed to be continuous in the front and rear directions. A tapered surface 51b1 inclined toward the shaft core side is formed on the front end side of the vertical rib 51b.

另外，第10圖~第12圖中，在縱肋51b與筆頭本體10的內周面之間圖示出了間隙，但實際上，縱肋51b以與筆頭本體10的內周面接觸或接近並鬆弛嵌合的方式形成。依據該結構，不僅能夠使向筆頭本體10內***前側構件51的作業變得容易，而且能夠使前側構件51整體的軸向彈性伸縮性變得良好。 In addition, in Figures 10 to 12, a gap is shown between the longitudinal rib 51b and the inner peripheral surface of the pen body 10, but in reality, the longitudinal rib 51b is in contact with or close to the inner peripheral surface of the pen body 10. And it is formed by loose fit. According to this structure, not only can it be inserted into the pen body 10 The work of the side member 51 becomes easy, and the axial elasticity and stretchability of the entire front side member 51 can be improved.

縱肋51b作為承受筆壓等而抑制前側構件51彎曲的加強肋而發揮作用。 The longitudinal rib 51b functions as a reinforcing rib that receives pen pressure or the like and suppresses the bending of the front side member 51.

並且，錐面51b1作為將承托構件50***筆頭本體10內時的引導面而發揮作用。 In addition, the tapered surface 51b1 functions as a guide surface when the receiving member 50 is inserted into the pen body 10.

在前側構件51內的中心部的後端側設有對後方進行了開口的圓筒狀的夾具***孔51c。 A cylindrical jig insertion hole 51c that opens to the rear is provided on the rear end side of the center portion in the front side member 51.

並且，如第14圖所示，後側構件52在圓柱狀的軸部52a的外周，沿周向隔開等間隔具有複數個(依據圖示例，為四個)朝向徑外方向突出之支撐突起52b。該後側構件52承托前側構件51的後端面，並且使前述複數個支撐突起52b遍及前後方向壓接於筆頭本體10的內壁面，從而以不能進退的方式被固定。 Furthermore, as shown in Figure 14, the rear member 52 has a plurality of (four according to the example of the figure) supports projecting radially outwardly at equal intervals along the circumferential direction on the outer periphery of the cylindrical shaft portion 52a The protrusion 52b. The rear side member 52 supports the rear end surface of the front side member 51, and the plurality of support protrusions 52b are pressed against the inner wall surface of the pen body 10 in the front-rear direction to be fixed so as not to advance or retreat.

後側構件52的支撐突起52b的數量設定為比前側構件51的縱肋51b的數量多。(參照第12圖)。 The number of support protrusions 52 b of the rear side member 52 is set to be greater than the number of the longitudinal ribs 51 b of the front side member 51. (Refer to Figure 12).

上述結構的前側構件51由比後側構件52更容易彈性變形的材料形成。並且，後側構件52由比前側構件51耐磨性更高的材料形成。 The front side member 51 of the above-mentioned structure is formed of a material that is easier to elastically deform than the rear side member 52. In addition, the rear side member 52 is formed of a material having higher wear resistance than the front side member 51.

在本實施形態的較佳一例中，前側構件51由PE(聚乙烯樹脂)形成，後側構件52由POM(聚甲醛樹脂)形成。 In a preferable example of this embodiment, the front side member 51 is formed of PE (polyethylene resin), and the rear side member 52 is formed of POM (polyoxymethylene resin).

前述PE可使用彈性係數(彈性率)為4~17[10^3kg/cm^2]、摩擦係數為0.3~0.5、硬度為HDD45~75的聚乙烯樹脂。 The aforementioned PE can use a polyethylene resin with a coefficient of elasticity (elasticity) of 4-17 [10^3kg/cm^2], a coefficient of friction of 0.3-0.5, and a hardness of HDD45-75.

前述POM可使用彈性係數為24~31[10^3kg/cm^2]、摩擦係數為約0.18、硬度為約HRR118的聚甲醛樹脂。 The aforementioned POM can be used with a coefficient of elasticity of 24 to 31 [10^3kg/cm^2], a coefficient of friction of about 0.18, A polyoxymethylene resin with a hardness of about HRR118.

接著，在第10圖所示之原子筆頭3中，對在筆頭本體10內組裝轉印球珠20及承托構件50的步驟進行詳細敘述。 Next, in the ballpoint pen 3 shown in FIG. 10, the steps of assembling the transfer ball 20 and the supporting member 50 in the pen body 10 will be described in detail.

首先，轉印球珠20從前方***於筆頭本體10，藉由球珠室11周壁的前端側被鉚接加工而形成內向環狀突起11a1。 First, the transfer ball 20 is inserted into the pen body 10 from the front, and the front end side of the peripheral wall of the ball chamber 11 is riveted to form an inward annular protrusion 11a1.

接著，前側構件51從後方***於筆頭本體10，該前側構件51(詳細而言為縮小部51a)的前端面抵接於轉印球珠20的後端部。 Next, the front side member 51 is inserted into the pen body 10 from the rear, and the front end surface of the front side member 51 (specifically, the reduced portion 51 a) abuts against the rear end of the transfer ball 20.

另外，在筆頭本體10中***前側構件51的作業中，作為一例，在前側構件51的夾具***孔51c中***棒狀的夾具(未圖示)來進行。前述夾具在前述***作業後被拔出。作為其他例，亦可不使用夾具***孔51c及前述夾具而在筆頭本體10內***前側構件51。 In addition, in the work of inserting the front side member 51 into the pen body 10, as an example, a rod-shaped jig (not shown) is inserted into the jig insertion hole 51c of the front side member 51. The clamp is pulled out after the insertion operation. As another example, the front side member 51 may be inserted into the pen body 10 without using the jig insertion hole 51c and the aforementioned jig.

接著，後側構件52從後方壓入於筆頭本體10。被壓入的後側構件52將前端部抵接於前側構件51的後端部。因此，前側構件51成為被轉印球珠20及後側構件52從前後方向被夾住的狀態。 Next, the rear side member 52 is pressed into the pen body 10 from behind. The pushed-in rear side member 52 abuts the front end portion against the rear end portion of the front side member 51. Therefore, the front side member 51 is in a state in which the transferred ball 20 and the rear side member 52 are sandwiched from the front-rear direction.

前述壓入時的按壓力被適當地設定成轉印球珠20被承托構件50推壓而被按壓在內向環狀突起11a1，從而防止墨水泄露，並且可使轉印球珠20順暢地旋轉且以適度、合適的筆壓輕鬆地進行書寫。 The pressing force during the aforementioned pressing is appropriately set so that the transfer ball 20 is pressed by the supporting member 50 and pressed against the inward annular protrusion 11a1, thereby preventing ink leakage and allowing the transfer ball 20 to rotate smoothly And write easily with moderate and appropriate pen pressure.

藉此，在上述結構的原子筆頭3中，亦與上述原子筆頭1同樣地、可用作書寫用具100(原子筆)的組件，並能夠在書寫時穩定地得到與按壓力相應的粗細的書寫線。 Thereby, the ballpoint pen 3 of the above structure can be used as a component of the writing instrument 100 (ballpoint pen) in the same way as the ballpoint pen 1 described above, and it is possible to stably obtain writing with a thickness corresponding to the pressing force during writing. line.

而且，後側構件52由比前側構件51耐磨性更高的材料形成，因此在被壓入於筆頭本體10時，後側構件52的支撐突起52b不易切削，而且能夠防止筆頭本體10內殘留切屑等異物，並且使承托構件50與筆頭本體10的嵌合力穩定而不使其降低，並且，能夠提高前述壓入時的作業性。 Moreover, the rear member 52 is formed of a material with higher wear resistance than the front member 51, so when it is pressed into the pen body 10, the supporting protrusion 52b of the rear member 52 is not easy to cut, and can prevent It is possible to prevent foreign matter such as chips from remaining in the pen head body 10 and stabilize the fitting force of the receiving member 50 and the pen head body 10 without reducing it, and it is possible to improve the workability at the time of pressing.

並且，前側構件51由比後側構件52更容易彈性變形的材料形成，因此能夠藉由筆壓使前側構件51的部分、尤其使縮小部51a有效地收縮，並能夠使基於筆壓調整的線寬調整變得容易。 In addition, the front side member 51 is formed of a material that is easier to elastically deform than the rear side member 52. Therefore, the part of the front side member 51, especially the reduced portion 51a, can be effectively contracted by the pen pressure, and the line width adjusted based on the pen pressure can be adjusted. Adjustment becomes easy.

並且，在該原子筆頭3中，設為藉由使承托構件50的縱肋51b數量與後側構件52的支撐突起52b的數量不同而減少墨水流通路徑的阻力。 In addition, in the ballpoint pen 3, the resistance of the ink flow path is reduced by making the number of the longitudinal ribs 51b of the supporting member 50 and the number of the supporting protrusions 52b of the rear side member 52 different.

亦即，前側構件51在組裝作業等中有旋轉的可能性，但假設將縱肋51b設為與支撐突起52b數量相同的情況下，若縱肋51b的後端部位於相鄰的各支撐突起52b、52b之間的前方，則朝向前方流通的墨水從各縱肋51b的後端面承受較大的阻力。 That is, the front side member 51 may be rotated during assembly work, etc., but assuming that the number of vertical ribs 51b is the same as the number of support protrusions 52b, if the rear end of the vertical rib 51b is located at each adjacent support protrusion In the front between 52b and 52b, the ink flowing forward receives a large resistance from the rear end surface of each vertical rib 51b.

然而，依據本實施形態的原子筆頭3，如第12圖所示，相鄰的縱肋51b、51b之間與相鄰的支撐突起52b、52b之間容易確保朝向軸向連通的部分，因此能夠減輕墨水流通阻力。 However, according to the ballpoint pen tip 3 of this embodiment, as shown in Fig. 12, it is easy to secure the portion communicating in the axial direction between the adjacent longitudinal ribs 51b, 51b and the adjacent supporting protrusions 52b, 52b. Reduce the resistance of ink circulation.

<第4實施形態> <Fourth Embodiment>

第15圖所示之原子筆頭4為對上述原子筆頭1將承托構件30替換為承托構件60的原子筆頭。 The ballpoint pen tip 4 shown in FIG. 15 is a ballpoint pen tip obtained by replacing the supporting member 30 with the supporting member 60 for the above-mentioned ballpoint pen tip 1.

承托構件60由具有縮小部61a的前側構件61及具有支撐突起62a的後側構件62這兩個構件一體構成。 The receiving member 60 is integrally constituted by two members of a front side member 61 having a reduced portion 61a and a rear side member 62 having a supporting protrusion 62a.

前側構件61僅由與上述原子筆頭1中的縮小部31(參照第1圖)大致相同形狀的縮小部61a形成。 The front-side member 61 is formed only by a reduced portion 61a having substantially the same shape as the reduced portion 31 (refer to FIG. 1) in the ballpoint pen head 1 described above.

後側構件62形成為與比上述原子筆頭1中的縮小部31更靠後側的部分大致相同形狀，並具有沿周向隔開等間隔的複數個(依據圖示例，為三個)支撐突起62a。 The rear member 62 is formed in substantially the same shape as the part on the rear side than the reduced portion 31 in the ballpoint pen head 1, and has a plurality of supports (three according to the example in the figure) at equal intervals in the circumferential direction. The protrusion 62a.

前側構件61與上述原子筆頭3的前側構件51為相同材質(PE)，後側構件62與上述原子筆頭3的後側構件52為相同材質(POM)。 The front side member 61 and the front side member 51 of the ballpoint pen head 3 are made of the same material (PE), and the rear side member 62 and the rear side member 52 of the ballpoint pen head 3 are made of the same material (POM).

亦即，前側構件61由比後側構件62更容易彈性變形的材料形成，後側構件62由比前側構件61耐磨性更高的材料形成。 That is, the front side member 61 is formed of a material that is easier to elastically deform than the rear side member 62, and the rear side member 62 is formed of a material having higher wear resistance than the front side member 61.

這些前側構件61與後側構件62藉由雙色成型(雙成型)連結成一體，構成承托構件60。 These front-side members 61 and rear-side members 62 are integrated by two-color molding (two-molding) to form a supporting member 60.

另外，作為其他例，亦可設為在後側構件62的前端部設置凹部，並將前側構件61嵌合或螺合在該凹部的方式。 In addition, as another example, it is also possible to provide a recessed portion at the front end portion of the rear side member 62, and to fit or screw the front side member 61 into the recessed portion.

另外，第15圖中，符號62a1為使對筆頭本體10的***作業變得容易的錐面。並且，符號62c為用於***夾具的夾具***孔，可依據需要使用。 In addition, in FIG. 15, reference numeral 62a1 is a tapered surface that facilitates the insertion operation into the pen body 10. In addition, the symbol 62c is a jig insertion hole for inserting the jig, which can be used as needed.

若對原子筆頭4的製造步驟進行說明，則在筆頭本體10的前端側***有轉印球珠20，筆頭本體10的前端側被鉚接之後，承托構件60從後方側被壓入於筆頭本體10。該作業藉由將棒狀的夾具(未圖示)***承托構件60後端側的夾具***孔62c來進行。 If the manufacturing steps of the ballpoint pen 4 are described, the transfer ball 20 is inserted into the tip of the pen body 10, and after the tip of the pen body 10 is riveted, the support member 60 is pressed into the pen body from the rear side 10. This operation is performed by inserting a rod-shaped clamp (not shown) into the clamp insertion hole 62c on the rear end side of the supporting member 60.

前述壓入時的按壓力被適當地設定成轉印球珠20被承托構件60推壓而被按壓在內向環狀突起11a1，從而防止墨水泄露，並且可使轉印球珠20順暢地旋轉且以適度、合適的筆壓輕鬆地進行書寫。 The pressing force during the aforementioned pressing is appropriately set so that the transfer ball 20 is pressed by the supporting member 60 to be pressed against the inward annular protrusion 11a1, thereby preventing ink leakage and allowing the transfer ball 20 to rotate smoothly And write easily with moderate and appropriate pen pressure.

藉此，在上述結構的原子筆頭4中，亦與上述原子筆頭1 同樣地、可用作書寫用具100(原子筆)的組件，並能夠在書寫時穩定地得到與按壓力相應的粗細的書寫線。 Thereby, in the ballpoint pen tip 4 of the above structure, it is also compatible with the ballpoint pen tip 1 Similarly, it can be used as a component of the writing instrument 100 (ball pen), and can stably obtain a writing line of thickness corresponding to the pressing force during writing.

而且，後側構件62由比前側構件61耐磨性更高的材料形成，因此被壓入於筆頭本體10時，後側構件62的支撐突起62a不易切削，而且能夠防止筆頭本體10內殘留切屑等異物，並且能夠提高前述壓入時的作業性。 Furthermore, the rear member 62 is formed of a material with higher wear resistance than the front member 61, so when it is pressed into the pen body 10, the support protrusion 62a of the rear member 62 is not easy to cut, and it is possible to prevent chips and the like remaining in the pen body 10. Foreign matter, and can improve the workability at the time of pressing.

並且，前側構件61(縮小部61a)由比後側構件62更容易彈性變形的材料形成，因此能夠藉由筆壓使前側構件61(縮小部61a)有效地收縮，並能夠使基於筆壓調整的線寬調整變得容易。 In addition, the front member 61 (reduced portion 61a) is formed of a material that is easier to elastically deform than the rear member 62. Therefore, the front member 61 (reduced portion 61a) can be effectively contracted by the pressure of the pen, and the pressure-based adjustment Line width adjustment becomes easy.

<第5實施形態> <Fifth Embodiment>

第18圖所示之原子筆頭5為對上述原子筆頭4(參照第15圖)將筆頭本體10替換為筆頭本體10’的原子筆頭。 The ballpoint pen tip 5 shown in Fig. 18 is a ballpoint pen tip obtained by replacing the pen tip body 10 with a pen tip body 10' for the aforementioned ballpoint pen tip 4 (refer to Fig. 15).

筆頭本體10’為對先前說明的筆頭本體10設置彎曲抑制突起15及導墨槽15b，並且對收縮部12進行了偏靠前的位置變更的筆頭本體。 The tip body 10' is a tip body in which the bending suppression protrusion 15 and the ink guide groove 15b are provided to the tip body 10 described earlier, and the constriction 12 is changed to the front position.

若進行詳細說明，則在筆頭本體10’內的前端側的球珠室11內設有以藉由前端面12b承托後退時的轉印球珠20的方式縮徑的收縮部12(參照第20圖)。 To explain in detail, the ball chamber 11 on the tip side in the pen body 10' is provided with a constriction 12 (refer to the section) that is reduced in diameter so that the transfer ball 20 is received by the tip surface 12b when retreating. 20 pictures).

筆頭本體10’在比收縮部12的前端面12b更靠後方側的內壁具有抑制縮小部61a朝向徑向的彎曲的彎曲抑制突起15。 The pen body 10' has on the inner wall on the rear side of the front end surface 12b of the constricted portion 12 a bending suppression protrusion 15 that suppresses the bending of the constricted portion 61a in the radial direction.

收縮部12的前端面12b為隨著靠近中心部而朝向後方傾斜的大致鉢狀的面。 The front end surface 12b of the constricted part 12 is a substantially bowl-shaped surface which inclines toward the back as it approaches the center part.

該收縮部12在承托後退時的轉印球珠20的狀態下，以使該轉印球珠20從筆頭本體10’的前端朝向前方突出尺寸P的方式，其前後位置被設定。 The constricted portion 12 is in a state of supporting the transfer ball 20 at the time of retreat, and its front and rear positions are set so that the transfer ball 20 protrudes from the tip of the pen body 10' forward by a dimension P.

尺寸P以如下方式被設定，亦即，使轉印球珠20的前端側外周面與被書寫面接觸，並以通常的書寫角度(60~90度)進行了書寫時，筆頭本體10’前端緣不易與被書寫面摩擦，從而被書寫面與筆頭本體10’前端緣的摩擦變小而進行順暢的書寫。 The size P is set in the following manner, that is, when the outer peripheral surface of the tip side of the transfer ball 20 is in contact with the surface to be written, and writing is performed at a normal writing angle (60 to 90 degrees), the tip of the pen body 10' The edge is not easy to rub against the surface to be written, so the friction between the surface to be written and the tip edge of the pen body 10' becomes smaller, and writing can be performed smoothly.

彎曲抑制突起15在縮小部61a的周圍，沿周向隔開規定間隔設有複數個。沿周向相鄰的彎曲抑制突起15之間的部分成為向前後方向連續的導墨槽15b。 The bending suppression protrusion 15 is provided in plural at predetermined intervals in the circumferential direction around the reduced portion 61a. The portion between the bending restraining protrusions 15 adjacent in the circumferential direction becomes the ink guide groove 15 b continuous in the front and back direction.

各彎曲抑制突起15相對於收縮部12的內徑而縮徑為階梯狀。 Each bending suppression protrusion 15 is reduced in diameter stepwise with respect to the inner diameter of the constricted portion 12.

關於彎曲抑制突起15的前端面15a的位置，如第20圖中以雙點鏈線所示，在藉由來自前方的按壓力而轉印球珠20後退並抵接於收縮部12的前端面12b(詳細而言為角部)的情況下，以在該後退的轉印球珠20的後部側部分與彎曲抑制突起15的前端面15a之間確保儲墨空間s3的方式適當地被設定。 Regarding the position of the front end surface 15a of the bending restraining projection 15, as shown by the double-dot chain line in FIG. 20, the transfer ball 20 retreats and abuts against the front end surface of the constriction 12 by the pressing force from the front. In the case of 12b (more specifically, a corner portion), it is appropriately set so that the ink storage space s3 is secured between the rear portion of the transferred transfer ball 20 and the front end surface 15a of the bending restraining protrusion 15.

並且，如第20圖所示，各彎曲抑制突起15具有隨著靠近中心部而朝向後方傾斜的前端面15a及隨著靠近中心部而朝向前方傾斜的後端面15c，並使朝向徑內方向突出之突端面15d與縮小部61a的外周面接近或接觸。 And, as shown in FIG. 20, each of the bending suppression protrusions 15 has a front end surface 15a that is inclined rearward as it approaches the center portion, and a rear end surface 15c that is inclined forward as it approaches the center portion, and protrudes in the radial direction. The protruding end surface 15d is close to or in contact with the outer peripheral surface of the reduced portion 61a.

突端面15d不與縮小部61a的外周面接觸而以接近的方式被設定尺寸，但由於承托構件60的尺寸偏差、伴隨製造的傾斜等而亦有與縮小部61a接觸的情況。 The protruding end surface 15d is not in contact with the outer peripheral surface of the reduced portion 61a and is dimensioned so as to be close to each other. However, due to dimensional deviation of the receiving member 60, inclination accompanying manufacturing, etc., it may come into contact with the reduced portion 61a.

並且，導墨槽15b在彎曲抑制突起15及收縮部12的內周側，沿周向隔開規定間隔配設有複數個。各導墨槽15b以貫穿彎曲抑制突起15及收縮部12的方式向前後方向連續。各導墨槽15b中，其底部(徑外方向的內表面)位於比收縮部12的內徑更靠徑外方向的一側(參照第19圖)。 In addition, a plurality of ink guide grooves 15b are arranged on the inner peripheral side of the bending suppression protrusion 15 and the contraction portion 12 at predetermined intervals in the circumferential direction. Each ink guiding groove 15b penetrates through bending to suppress protrusion The way of the rise 15 and the constriction 12 is continuous in the forward and backward direction. In each ink channel 15b, the bottom (inner surface in the radial direction) is located on the radially outer side than the inner diameter of the constricted portion 12 (refer to FIG. 19).

該導墨槽15b使比彎曲抑制突起15更靠後側的墨水朝向比該彎曲抑制突起15及收縮部12更靠前側流通。 The ink guide groove 15 b circulates the ink on the rear side of the bending restraining protrusion 15 toward the front side of the bending restraining protrusion 15 and the constricted portion 12.

藉此，依據原子筆頭5，如第20圖~第21圖所示，在初始狀態下轉印球珠20從收縮部12朝向前方分開，該轉印球珠20的後端部與縮小部61a的前端部接近或接觸。 Thus, according to the ballpoint pen head 5, as shown in Figs. 20 to 21, in the initial state, the transfer ball 20 is separated from the constriction 12 toward the front, and the rear end of the transfer ball 20 and the constriction 61a The front end is close to or touching.

在該狀態下朝向後方的比較強的按壓力施加於轉印球珠20，縮小部61a藉由該按壓力欲朝向徑向彎曲時，縮小部61a的外周面被彎曲抑制突起15的內周面承托，從而其彎曲得到抑制。 In this state, a relatively strong pressing force toward the rear is applied to the transfer ball 20, and when the reduced portion 61a is bent in the radial direction by this pressing force, the outer peripheral surface of the reduced portion 61a is bent by the inner peripheral surface of the restraining protrusion 15 Support, so that its bending is suppressed.

因此，縮小部61a幾乎不朝向徑向彎曲而朝向後方彈性收縮。因此，能夠防止因前述彎曲而在特定方向的書寫中發生墨水飛白或線寬變得不穩定。 Therefore, the reduced portion 61a hardly bends in the radial direction but elastically contracts toward the rear. Therefore, it is possible to prevent the occurrence of ink whitening or unstable line width during writing in a specific direction due to the aforementioned bending.

亦即，藉由前述彎曲，能夠防止突端面15d與縮小部61a之間的間隙不均而墨水流量變得不穩定的現象，並能夠消除因這種現象而引起的不良情況。 That is, by the aforementioned bending, it is possible to prevent the phenomenon that the gap between the protruding end surface 15d and the reduced portion 61a becomes uneven and the ink flow rate becomes unstable, and it is possible to eliminate defects caused by this phenomenon.

而且，依據本實施形態的較佳一例，設置遍及彎曲抑制突起15及收縮部12的導墨槽15b，而且，由於在比前端面15a更前側確保了儲墨空間s3，因此能夠穩定地確保墨水流通量，尤其，在施加較強的筆壓而轉印球珠20較大幅度地後退的情況下，不會丟失墨水的流通流路及儲留空間而能夠書寫與其筆壓相應的粗線。 Furthermore, according to a preferred example of the present embodiment, the ink guide groove 15b is provided throughout the bending restraining protrusion 15 and the constriction 12, and since the ink storage space s3 is secured on the front side of the front end surface 15a, the ink can be stably secured In particular, when a strong pen pressure is applied and the transfer ball 20 retreats largely, the flow volume can write thick lines corresponding to the pen pressure without losing the ink flow path and storage space.

而且，如第20圖中以雙點鏈線所示，在由於較強的按壓力而轉印球珠20的後退量比較大的情況下，該轉印球珠20亦藉由收縮部12被承托，且後退狀態的轉印球珠20的前端側位於比筆頭本體10’的前端更前方，因此能夠防止筆頭本體10’的前端緣與被書寫面摩擦等而無法書寫的情況。 Moreover, as shown by the double-dot chain line in FIG. 20, when the retreat amount of the transfer ball 20 is relatively large due to the strong pressing force, the transfer ball 20 is also blocked by the contraction portion 12 The tip side of the transfer ball 20 that is supported and retracted is located forward of the tip of the pen body 10'. Therefore, it is possible to prevent the tip edge of the pen body 10' from rubbing against the surface to be written and making it impossible to write.

<其他變形例> <Other Modifications>

另外，上述實施形態中，並未特別限定收縮部12的導墨槽12a(參照第5圖)與角筒狀內壁面11b的內角狀部分11c的位置關係，但作為進一步減輕墨水的流通阻力的方式，亦可以將複數個導墨槽12a分別配置成與內角狀部分11c對應。 In addition, in the above-mentioned embodiment, the positional relationship between the ink channel 12a of the constricted portion 12 (refer to FIG. 5) and the inner corner portion 11c of the corner cylindrical inner wall surface 11b is not particularly limited, but it serves to further reduce the flow resistance of ink. In this way, a plurality of ink guiding grooves 12a may be respectively arranged to correspond to the inner corner portion 11c.

並且，第9圖所示之原子筆頭2中，在承托構件30的前端與轉印球珠20的後端之間設置了間隙s2，但作為其他例，亦可省略間隙s2而設為使承托構件30的前端抵接於轉印球珠20的後端的方式。 In addition, in the ballpoint pen 2 shown in FIG. 9, a gap s2 is provided between the front end of the supporting member 30 and the rear end of the transfer ball 20, but as another example, the gap s2 may be omitted and set to The front end of the supporting member 30 abuts against the rear end of the transfer ball 20.

並且，圖示例中，作為尤其較佳的方式，在球珠室11內設置了角筒狀內壁面11b(參照第3圖)，但作為其他例，亦可設為代替角筒狀內壁面11b而設置了圓筒狀內壁面等圖示以外的形狀的內壁面的方式，在該其他例中，亦藉由來自前方的按壓力而使承托構件30(50或60)伸縮，並且使轉印球珠20進退，從而能夠得到與該按壓力相應的線寬的書寫線。 In addition, in the example shown in the figure, as a particularly preferable method, a square cylindrical inner wall surface 11b is provided in the ball chamber 11 (refer to FIG. 3), but as another example, it may be used instead of the square cylindrical inner wall surface. 11b is a method in which an inner wall surface of a shape other than the one shown in the figure, such as a cylindrical inner wall surface, is provided. In this other example, the support member 30 (50 or 60) is expanded and contracted by the pressing force from the front, and the The transfer ball 20 advances and retreats, so that a writing line with a line width corresponding to the pressing force can be obtained.

並且，依據圖示例，對設為藉由承托構件30等而能夠調整線寬的原子筆頭1(2、3或4)，在球珠室11內設置了角筒狀內壁面11b(參照第3圖)，但角筒狀內壁面11b可代替不具備承托構件30(50或60)的原子筆頭、承托構件30(50或60)而對具有反彈轉印球珠20的螺旋彈簧的原子筆頭等，適用於其球珠室的內壁面，在設為如此的情況下，亦能夠藉由角筒狀內壁面11b中的內角狀部分11c內側的間隙s1確保穩定的墨水流量。 In addition, according to the example shown in the figure, for the ball pen tip 1 (2, 3, or 4) whose line width can be adjusted by the supporting member 30 and the like, a square cylindrical inner wall surface 11b is provided in the ball chamber 11 (refer to Figure 3), but the angular cylindrical inner wall surface 11b can replace the ballpoint pen without the supporting member 30 (50 or 60), the supporting member 30 (50 or 60), and the coil spring with the rebound transfer ball 20 The ball-point pen tip of, etc., is suitable for the inner wall surface of the ball chamber. In this case, the gap s1 inside the inner corner portion 11c of the corner cylindrical inner wall surface 11b can ensure a stable ink flow.

並且，依據上述原子筆頭1(2、3或4)，作為尤其較佳的方式，由能夠彈性變形的硬質合成樹脂材料形成了承托構件30(50或60)，但作為其他例，亦可由金屬材料(作為具體例，為不銹鋼、黃銅等)形成承托構件30(50或60)的一部分或全部。在設為如此的情況下，由能夠彈性變形的合成樹脂材料形成轉印球珠20為較佳。 In addition, according to the above-mentioned ballpoint pen 1 (2, 3, or 4), as a particularly preferable method, the supporting member 30 (50 or 60) is formed of a hard synthetic resin material that can be elastically deformed, but as another example, it may be made of metal The material (as a specific example, stainless steel, brass, etc.) forms part or all of the supporting member 30 (50 or 60). In such a case, it is preferable to form the transfer ball 20 of a synthetic resin material that can be elastically deformed.

並且，依據圖示例，作為具備原子筆頭1的書寫用具100的一例而構成了單色的原子筆，但作為書寫用具100的其他例，亦可構成具備複數種顏色的原子筆替芯的多色書寫用具、具備原子筆替芯和自動鉛筆替芯等複數種替芯的多功能書寫用具。另外，對原子筆頭2、3或4，亦能夠同樣地構成書寫用具100是理所當然的。 In addition, according to the example shown in the figure, a single-color ball pen is constituted as an example of the writing instrument 100 provided with a ball pen tip 1, but as another example of the writing instrument 100, there may be many ball pen refills provided with plural colors. Color writing utensils, multifunctional writing utensils with multiple types of refills such as ballpoint pen refills and mechanical pencil refills. In addition, it is a matter of course that the writing instrument 100 can be configured in the same manner for the ball pen tips 2, 3, or 4.

並且，在上述原子筆頭3(參照第10圖)中，設為使分體的前側構件51與後側構件52抵接，但作為其他例，亦可設為藉由嵌合或螺合將前側構件51和後側構件52進行了一體化的方式、藉由雙成型將前側構件51和後側構件52進行了一體化的方式等。 In addition, in the above-mentioned ballpoint pen 3 (refer to FIG. 10), it is assumed that the front side member 51 and the rear side member 52 are separated into contact with each other. However, as another example, the front side member 51 may be fitted or screwed. The method in which the member 51 and the rear member 52 are integrated, the method in which the front member 51 and the rear member 52 are integrated by double molding, and the like.

並且，在原子筆頭4(參照第15圖)中，一體連結了前側構件61和後側構件62，但作為其他例，可設為在後側構件62的前端設置凹部，並且在該凹部以能夠進退的方式嵌合前側構件61的方式。 In addition, in the ballpoint pen tip 4 (refer to FIG. 15), the front member 61 and the rear member 62 are integrally connected, but as another example, a recess may be provided at the tip of the rear member 62, and the recess may be The way of advancing and retreating is fitted into the way of the front side member 61.

並且，依據圖示例，僅在原子筆頭2設置了螺旋彈簧40，但亦可對原子筆頭3、原子筆頭4適用大致相同的結構而設置螺旋彈簧40。 In addition, according to the illustrated example, only the ballpoint pen 2 is provided with the coil spring 40, but the ballpoint pen head 3 and the ballpoint pen 4 may be provided with the coil spring 40 by applying substantially the same structure.

並且，在原子筆頭1、4(參照第1圖及第15圖)中，將承托構件30(或60)以不能進退的方式嵌合於筆頭本體10，但作為其他例，亦可設為將承托構件30(或60)以不能後退且能夠前進的方式卡合於筆頭本體10的方式。該情況下，藉由與轉印球珠20抵接而限制承托構件30(或60)朝向前方的移動。 In addition, in the ballpoint pen heads 1, 4 (refer to Figures 1 and 15), the supporting member 30 (or 60) is fitted to the pen body 10 in a manner that cannot advance or retreat, but as another example, it can also be set as The supporting member 30 (or 60) is engaged with the pen head body 10 in a manner that cannot move backward and can move forward. In this case, the forward movement of the receiving member 30 (or 60) is restricted by contacting the transfer ball 20.

並且，在原子筆頭5(第18圖~第21圖)中，彎曲抑制突起15不與縮小部61a的側壁接觸而以接近的方式進行了尺寸設定，但作為其他例，亦可設為以彎曲抑制突起15與縮小部61a的側壁接觸的方式進行尺寸設定，並藉由朝向後方的按壓力而縮小部61a與彎曲抑制突起15摩擦而收縮的方式。 In addition, in the ballpoint pen tip 5 (FIGS. 18-21), the bending suppression protrusion 15 is not in contact with the side wall of the reduced portion 61a and is sized so as to be close to each other. However, as another example, it may be set to be bent The size is set to prevent the protrusion 15 from contacting the side wall of the reduced portion 61a, and the reduced portion 61a rubs against the curvature inhibiting protrusion 15 and shrinks by pressing force toward the rear.

並且，原子筆頭5(第18圖~第21圖)設為對原子筆頭4(參照第15圖)追加了彎曲抑制突起15的結構，但作為其他例，亦可以為對原子筆頭1(第1圖)、原子筆頭2(第9圖)或原子筆頭3(第10圖)追加彎曲抑制突起15。 In addition, the ballpoint pen tip 5 (Figures 18 to 21) has a structure in which the bend suppressing protrusion 15 is added to the ballpoint pen tip 4 (see Figure 15), but as another example, the ballpoint pen tip 1 (the first Figure), ballpoint pen tip 2 (Figure 9) or ballpoint pen tip 3 (Figure 10) add a bending restraining protrusion 15.

並且，本發明並不限定於上述實施形態，在不改變本發明的主旨的範圍內可進行適當變更。 In addition, the present invention is not limited to the above-mentioned embodiment, and can be appropriately modified within a range that does not change the gist of the present invention.

5‧‧‧原子筆頭 5‧‧‧ballpoint pen

10’‧‧‧筆頭本體 10’‧‧‧The pen body

11‧‧‧球珠室 11‧‧‧Ball Room

11a1‧‧‧內向環狀突起 11a1‧‧‧Inward annular protrusion

11b‧‧‧角筒狀內壁面 11b‧‧‧Angular cylindrical inner wall

12(12b)‧‧‧收縮部的前端面 12(12b)‧‧‧Front end face of contraction

15‧‧‧彎曲抑制突起 15‧‧‧Bending suppression protrusion

15a‧‧‧前端面 15a‧‧‧Front face

15b‧‧‧導墨槽 15b‧‧‧Ink guide

15c‧‧‧後端面 15c‧‧‧Back

15d‧‧‧突端面 15d‧‧‧Protruding end face

20‧‧‧轉印球珠 20‧‧‧transfer ball

60‧‧‧承托構件 60‧‧‧Supporting member

61a‧‧‧縮小部 61a‧‧‧Reduced part

61‧‧‧前側構件 61‧‧‧Front side member

62‧‧‧後側構件 62‧‧‧Back side member

s3‧‧‧儲墨空間 s3‧‧‧Ink storage space

P‧‧‧尺寸 P‧‧‧Size

(XXI)-(XXI)‧‧‧線 (XXI)-(XXI)‧‧‧line

Claims

一種原子筆頭，具備：向前後方向貫穿內部的大致筒狀的筆頭本體；收容於該筆頭本體內的前端側，並且使外周面前端側從前述筆頭本體朝向前方突出之轉印球珠；以及配置於比筆頭本體內的前述轉印球珠更靠後方側的承托構件，前述原子筆頭藉由前述承托構件的前端部承托前述轉印球珠的後半部側，該原子筆頭的特徵為，前述承托構件構成為在其前端側具有朝向前方而截面積逐漸縮小的縮小部，形成為棒狀，該縮小部的最前端部配置於前述轉印球珠的後方，並且比該縮小部更靠後側的部分以不能後退之方式固定於前述筆頭本體，且承受來自前述轉印球珠的按壓力時彈性收縮，在前述筆頭本體的內壁設有與前述縮小部的側壁接近或接觸而抑制前述縮小部的彎曲的彎曲抑制突起。 A ballpoint pen, comprising: a substantially cylindrical pen body penetrating the inside in the front and back direction; a transfer ball that is housed on the front end side of the pen body and has the outer peripheral surface protruding forward from the pen body; and arrangement In the supporting member on the rear side of the transfer ball in the pen body, the ballpoint pen supports the rear half of the transfer ball by the front end of the supporting member. The feature of the ballpoint pen is The supporting member is configured to have a reduced portion on the front end side of which the cross-sectional area gradually decreases toward the front, and is formed in a rod shape. The foremost end portion of the reduced portion is arranged behind the transfer ball and is larger than the reduced portion. The more rear part is fixed to the pen body in a manner that cannot be retreated, and elastically shrinks when receiving the pressing force from the transfer ball. The inner wall of the pen body is provided with the side wall of the reduced part close to or contact On the other hand, the bending suppression protrusion suppresses the bending of the aforementioned reduced portion.

如申請專利範圍第1項所述之原子筆頭，其中前述彎曲抑制突起沿周向隔開間隔設有複數個，沿周向相鄰的前述彎曲抑制突起之間成為向前後方向連通的導墨槽。 The ballpoint pen head described in the first item of the scope of the patent application, wherein the bending restraining protrusions are provided in plural at intervals in the circumferential direction, and the bending restraining protrusions adjacent in the circumferential direction are formed as ink guide grooves communicating in the front and rear directions.

如申請專利範圍第1項所述之原子筆頭，其中在筆頭本體內的前端側設有藉由前端面承托後退時的前述轉印球珠的收縮部，前述彎曲抑制突起配置於比前述收縮部的前端面更靠後方側。 The ballpoint pen head described in claim 1, wherein the tip side of the pen body body is provided with a contraction portion of the transfer ball when the tip surface is supported and retracted, and the bending suppression protrusion is arranged to be more contracted than the aforementioned The front end surface of the part is closer to the rear side.

如申請專利範圍第3項所述之原子筆頭，其中前述收縮部以使承托的前述轉印球珠從前述筆頭本體的前端朝向前方突出之方式，其前後位置被設定。 As for the ballpoint pen head described in claim 3, the front and back positions of the constricted portion are set such that the supporting transfer ball protrudes forward from the front end of the pen head body.

如申請專利範圍第1項所述之原子筆頭，其中前述承托構件在比前述縮小部更後側，沿周向隔開間隔具有複數個朝向徑外方向突出之支撐突起，並使這些支撐突起壓接於筆頭本體的內壁面且以不能後退之方式被固定、該承托構件由具有前述縮小部的前側構件及具有前述支撐突起的後側構件這兩個構件構成。 The ball pen tip as described in item 1 of the scope of patent application, where The supporting member has a plurality of supporting protrusions protruding in the radially outward direction at intervals in the circumferential direction on the rear side than the reduced portion, and the supporting protrusions are pressed against the inner wall surface of the pen body and cannot be retreated. The receiving member that is fixed is composed of two members of the front side member having the reduced portion and the rear side member having the support protrusion.

如申請專利範圍第5項所述之原子筆頭，其中前述後側構件由比前述前側構件耐磨性更高的材料形成。 The ballpoint pen head as described in item 5 of the scope of patent application, wherein the rear member is formed of a material with higher wear resistance than the front member.

如申請專利範圍第5項所述之原子筆頭，其中前述前側構件由比前述後側構件更容易彈性變形的材料形成。 As for the ballpoint pen head described in item 5 of the scope of the patent application, the front side member is formed of a material that is easier to elastically deform than the back side member.

如申請專利範圍第5項所述之原子筆頭，其中前述前側構件在與前述筆頭本體的內周面鬆弛嵌合的狀態下設置於前述轉印球珠與前述後側構件之間。 The ballpoint pen head according to the fifth item of the scope of patent application, wherein the front side member is provided between the transfer ball and the back side member in a loosely fitted state with the inner peripheral surface of the pen head body.

如申請專利範圍第5項所述之原子筆頭，其中前述前側構件中，在比前述縮小部更靠後側的外周部，沿周向隔開間隔設有複數個遍及前後方向的縱肋，這些縱肋的數量與前述支撐突起的數量不同。 In the ballpoint pen head described in claim 5, in the front-side member, a plurality of longitudinal ribs extending in the front-rear direction are provided at intervals in the circumferential direction on the outer peripheral portion of the front side member that is more rearward than the aforementioned reduced portion. The number of longitudinal ribs is different from the number of the aforementioned supporting protrusions.

如申請專利範圍第5項所述之原子筆頭，其中前述前側構件與前述後側構件連結並一體化。 The ballpoint pen head described in the 5th item of the scope of patent application, wherein the front side member and the rear side member are connected and integrated.

一種書寫用具，其具備申請專利範圍第1至10項中任一項之原子筆頭。 A writing instrument provided with a ballpoint pen tip of any one of items 1 to 10 in the scope of patent application.