JP4636653B2 - Nib - Google Patents

Description

【００２０】
表１が示す通り、傾斜角θが２０゜以下では、傾斜角が小さくなるに従って評価が下がった。これは、傾斜角が小さくなるに伴って、傾斜角の視認性が悪くなるためであった。
また、傾斜角θが４０゜以上では、傾斜角が大きくなるに従って評価が下がった。これは、傾斜角が大きくなるに伴って、作業者が先端縁の鋭角部分で怪我する事を警戒するためであった。
また、傾斜角θが２０゜〜４０゜では、どれも最も高い評価となった。これは、この間の傾斜角が視認性が良く、作業者が鋭角部分を警戒しないためであった。
【００２１】
次に、本発明のペン先２における傾斜角θの大きさと筆記操作性との関係を検討するために、本発明の発明者が行った試験（試験２）を説明する。
試験２では、傾斜角θを５゜〜５０゜まで５゜刻みに変化させた１０種類のペン先２を設けた筆記具１を試験体として用意し、用意した１０種類の筆記具１と紙を試験１で試験者となった従業員５０人に手渡し、試験者が様々な文字や模様を筆記する時に、試験者が各々の傾斜角の大きさについて筆記感および操作性を評価するというものである。試験２の結果を表２に示す。
【００２２】
【表２】

【００２３】
表２が示す通り、傾斜角θが１５゜以下では、傾斜角が小さくなるに従って評価が下がった。これは、傾斜角が小さくなるに伴って、ペン先の筆圧やインキの吐出具合が良くなるものの、先端縁の傾斜方向の見極めが困難となり、書き始めに紙面に当接させるペン先の方向が判断しづらくなるためであった。
また、傾斜角θが３５゜以上では、傾斜角が大きくなるに従って評価が下がった。これは、傾斜角が大きくなるに伴って、ペン芯から先端縁までの距離が左右で大きく違ってくるのでインキの吐出量が左右で異なってしまったり、ペン先の弾力性が左右で大きく異なってしまい筆圧がばらついくためであった。
また、傾斜角θが１５゜〜３５゜では、どれも最も高い評価となった。これは、この間の傾斜角が、筆記時に先端縁を紙面へ接触させる時の筆記角度が良好な事や、インキの吐出量が左右で安定しており、ペン先の弾力性が左右共に良好であるため筆圧が安定すると共に、双方の薄板金属部材が良好に弾性変形してズレる事によって、インキ流路内に付着したインキかすを流路内から排出できるためであった。
【００２４】
以上の試験結果を鑑みて、本実施例のペン先２は、組立作業時の作業性および筆記時の筆記操作性を共に考慮すると、薄板金属部材２ａ，２ｂの先端縁２ｃ，２ｄの傾斜角θは１５゜〜４０゜の範囲で選定する事が好ましく、２０゜〜３５゜の範囲で選定する事はさらに好ましい事であると発明者が判断するに至った。
【００２５】
図６は本発明の他の実施例におけるペン先の組立作業時の概略姿図を示す。
図６に示す様に、他の実施例では、薄板金属部材２ａ，２ｂを互いに重ね合わす前に傾斜角θをペン先２の先端縁２ｃ、２ｄへ成形し、中間部に先端縁と平行な湾曲部２ｅ，２ｆを外方へ膨出する様に成形した。その他の形態は前述の実施例と同様のペン先である。尚、他の実施例のペン先にて前述同様に試験１と試験２を行ったところ、同様の評価結果であった。ただし、前述の実施例との違いとして、組立時において、薄板金属部材２ａ，２ｂを互いに重ね合わす際に、先端縁の傾斜角θの方向と湾曲部２ｅ，２ｆの向きの両方で、表裏の判別ができるという違いがあった。これは、他の実施例の薄板金属部材２ａ，２ｂは、正しく重ねた場合には、図７に示す様に互いの湾曲部２ｅ，２ｆが外方を向くので中間部が開き、表裏を間違えて組み立てた場合には、図８に示す様に部材間に隙間が少ししかできなかったり、図９に示す様に双方の部材が反り返ってしまうためであった。つまり、他の実施例は、先端縁２ｃ，２ｄの傾斜方向以外にも表裏の判断ができるのでさらに好ましい形態であった。
【００２６】
【発明の効果】
本発明によるペン先は前述の通り、薄板金属という材質を用いているため耐久性や弾力性に優れており、長期に渡り安定した状態で使用する事ができ、また、薄板金属部材の先端縁の傾斜角θを１５゜〜４０゜の範囲で選定する事によって、筆記時の筆記操作性が良好で、且つ、組立作業時の作業性が向上するという効果を奏する。また、傾斜角θを２０゜〜３５゜の範囲で選定する事によって前記効果はさらに向上する。
【図面の簡単な説明】
【図１】 本発明の実施例における筆記具の縦断面図を示す。
【図２】 本発明の実施例における筆記具の全体姿図を示す。
【図３】 本発明の実施例におけるペン先の組立作業時の概略姿図を示す。
【図４】 本発明の実施例におけるペン先の概略姿図を示す。
【図５】 薄板金属材の表裏を間違えて組み立てたペン先の概略姿図を示す。
【図６】 他の実施例におけるペン先の組立作業時の概略姿図を示す。
【図７】 他の実施例におけるペン先の概略姿図を示す。
【図８】 薄板金属材の表裏を間違えて組み立てたペン先の概略姿図を示す。
【図９】 薄板金属材の表裏を間違えて組み立てたペン先の概略姿図を示す。
【符号の説明】
１ 筆記具
２ ペン先
２ａ 薄板金属部材
２ｂ 薄板金属部材
２ｃ 先端縁
２ｄ 先端縁
２ｅ 湾曲部
２ｆ 湾曲部
３ 軸筒
４ ペン芯
５ 首部筒
６ 接続筒
７ インキタンク
８ 収納溝
９ インキ流路
１０ スリット
１１ 空気孔
１２ａ スペーサー
１２ｂ スペーサー
１２ｃ スペーサー
１２ｄ スペーサー[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pen tip formed by superposing a plurality of thin sheet metal members on each other and forming a small gap-like ink flow path between the thin sheet metal members over the entire length.
[0002]
[Prior art]
Conventionally, a molten resin such as polyester or polyacetal is drawn from a die in the form of a plurality of melted lines, and a micro-gap-shaped ink flow path is provided in the line direction and joined, and the joined tip is stretched flat. Processed resin nibs are known. In addition, resin fibers such as polyester, nylon, acrylic, etc. are bonded by impregnating the adhesive so that a micro-gap-shaped ink flow path is formed between the fibers, and the combined tip is cut into a flat plate shape. Resin pen nibs are also known.
A pen nib is also known in which a plurality of thin metal members are overlapped with each other and formed between the thin metal members as a minute gap-like ink channel over the entire length.
As is well known, writing instruments using a plate-shaped pen tip as described above can be used to draw fine lines or thick lines by adjusting the angle at which the tip of the pen tip contacts the paper surface or the direction of writing. Or, characters that change continuously from thin to middle, from middle to bold (and vice versa) can be written.
[0003]
By the way, when using a flat resin pen tip, it is known that the tip edge of the pen tip is inclined with respect to a virtual line direction orthogonal to the full length direction of the pen tip in order to improve writing operability. It has been.
Further, regarding a pen tip in which a plurality of thin metal members are superposed on each other, as disclosed in FIG. 6 of Japanese Patent Laid-Open No. 8-52977, the applicant of the present application attaches two stainless steel thin plate materials to each other. There is a superposition, with the tip edge of the pen tip slightly inclined.
[0004]
[Problems to be solved by the invention]
By the way, the resin-made nib is densely molded between the resins in order to give a capillary force, and as a result, the elasticity is poor and the writing feeling is hard. Therefore, in order to smooth the writing feel of the resin nib, the density of the resin fiber bundle is made coarse, the adhesive to be impregnated is reduced, or a soft resin material is used. However, there is a problem in that the tip of the pen tip becomes worn or damaged when used for a long period of time. In particular, when the inclination angle is increased, the acute angle portion formed at the tip end edge is easily damaged.
In addition, when a resin pen tip is used for a water-based ink marker, the self-colored pen tip absorbs the other writing color when writing over the other color writing part previously written. Therefore, there has been a problem that the writing color of the nib that has been written twice for a while becomes a writing color in which the own color and other colors are mixed.
[0005]
On the other hand, the pen tip made of a stack of multiple thin metal members is not brittle and highly elastic, and there are other ink channels with minute gaps when writing in duplicate with other colors when writing. Although it is difficult to absorb the color and some of the problems seen with the above-mentioned resin pen tip are improved, when the inclination angle θ is large, the elasticity is different between the left and right of the pen tip. To obtain uniform writing lines, such as the pressure on the paper varies, or the distance from the pen core to the tip edge of the pen tip is significantly different on the left and right, causing the ink discharge amount to be different on the left and right. It was difficult. In addition, because of the material of thin metal, there is a problem that the acute angle portion becomes like a sharp weapon, and there is a risk of damaging the paper surface and the human body.
In addition, when the inclination angle θ is small, it is difficult for the operator to recognize the delicate inclination angle of the tip edge at the time of assembling the pen tip, and as shown in FIG. There was a problem of matching.
Similarly, the user also mistakes the direction of the inclination angle of the tip edge when writing, and the tip edge comes into contact with the paper surface so that the acute angle portion is in front, and the paper surface is damaged at the acute angle portion. there were.
Normally, when there is a problem as described above, it is easy to recognize the direction of the member by placing a punch mark on the member or providing a notch in the member. In view of the properties and the flow of ink in the ink flow path, it is not preferable to provide unnecessary unevenness and notches in the thin metal member.
[0006]
An object of the present invention is to provide a pen that can be used in a stable state for a long period of time in view of the problems of the above-described conventional structure, has a good writing feeling during writing, and improves workability during assembly work. Is to provide the destination.
[0007]
[Means for Solving the Problems]
The present invention
“1.2 sheet metal members are stacked on top of each other, a minute gap-shaped ink flow path is formed over the entire length between the sheet metal members, and the ink in the ink tank provided inside the shaft cylinder is placed in the rear part. In the pen tip having a structure for supplying to the ink flow path through a fixed pen core, the tip edges of the two thin metal members are arranged in a virtual line direction orthogonal to the tip edge and the full length direction of the pen tip. Is formed by press working so that the inclination angle θ is in the range of 15 ° to 40 °, and is gradually thinned from the rear to the front between the two thin metal members by forming a bead or by interposing a spacer. the thin plate with protrusions to form made, the two pieces of sheet metal members, burrs during stamping of the leading edge of the sheet metal member is to narrow the gap between the tip portion by superimposing as warp on the back sides Capillary force acting between the sheet metal members is formed by spot welding from the surface of the genus member to the portion of the protrusion, and forming the ink flow path between the sheet metal members gradually narrowing from the rear to the front. A nib that is assembled so that the front is stronger than the rear.
2. 2. The pen tip according to 1, wherein the inclination angle θ is in the range of 20 ° to 35 °.
3. The sheet metal member is curved substantially parallel to the leading edge so that when the two sheets of the sheet metal member are overlapped, an intermediate portion of the two sheet metal members opens from each other 1 3. The nib according to item 2 or 2. Is.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, the inclination angle θ of the leading edge of the thin metal member is set in the range of 15 ° to 40 ° with respect to the imaginary line direction orthogonal to the full length direction of the pen tip. By setting, the writing operability when writing relatively wide lines and characters is improved, and the front and back of the thin metal member becomes conspicuous at the time of assembly work, and the workability is improved. .
In addition, when the inclination angle θ is set in the range of 20 ° to 35 °, the above-described effects can be obtained, and at the same time, the right and left of the pen tip can maintain substantially the same elasticity, so that the writing pressure is stabilized. In addition, since the ink discharge amount is substantially the same on the left and right, it is preferable because the effect of being able to write a uniform writing line can be obtained. In addition, there is an effect that the risk of damaging the paper surface or the human body at the acute angle portion of the nib is further reduced.
[0009]
In addition, when the two thin metal members are overlapped, the thin metal member is curved substantially parallel to the front edge so that the middle portion of the two thin metal members opens. During assembly work, the front and back of thin metal members become more prominent due to bending, and even when a large number of thin metal members are placed together in one place, the members do not easily overlap each other and can be easily picked up by the operator. In addition to improving the workability, the gap at the tip when assembled can be made extremely narrow compared to the gap at the middle, giving a strong capillary force to the tip of the pen tip, This is because there is a synergistic effect that ink discharge becomes smoother. The thin metal member may be bent instead of being bent.
[0010]
As the material of the thin metal member, a well-known metal material such as stainless steel, 14 gold, 18 gold, steel, and copper can be selected as appropriate. In particular, considering that the thin metal member is given corrosion resistance and elasticity. It is preferable to use stainless steel.
In addition, as a preferable method for setting the gap of the ink flow path to be a minute gap, the surface of the member is provided with a bead between the back surfaces or a spacer so that a gap is formed between the two thin metal members. To fix by spot welding . Incidentally, if as to fix only the rear portion of the sheet metal member, the front portion of the sheet metal member unfixed portions are elastically deformed so as cause mutual slip displacement on paper writing pressure, writing feeling during writing Can be smoothed.
[0011]
An ink tank in which a pen core fixed to the rear part of the pen nib is inserted into a neck cylinder fixed to the tip of the shaft cylinder, and a connection cylinder formed in the rear part of the pen core is provided inside the shaft cylinder. By adopting a structure that is press-fitted into the ink, the ink can be supplied from the ink tank to the ink flow path, and continuous writing can be performed. In addition, it is preferable to form a slit at the tip edge of the nib because ink can be transferred to the paper surface through the slit even if the ink flow path is not in contact with the paper surface during writing.
[0012]
【Example】
Next, an embodiment of the present invention will be described in order to solve the above-described problems. In the present embodiment, the structure of the present invention will be described with reference to the drawings in order to make the configuration of the present invention easier to understand. However, the present invention is not limited to the examples. In addition, the same number is attached | subjected about the same member in the Example, and the same component.
[0013]
FIG. 1 is a longitudinal sectional view of a writing instrument in an embodiment of the present invention. FIG. 2 shows an overall view of the writing instrument in the embodiment of the present invention.
[0014]
In FIG. 1 and FIG. 2, the writing instrument 1 is provided with a pen tip 2 formed by superposing two thin metal members 2 a and 2 b on each other in front of the shaft tube 3. Further, the leading edges 2c and 2d of the thin metal members 2a and 2b that become writing parts at the time of writing are in a virtual line direction (two-dot chain line in the drawing) perpendicular to the full length direction of the pen tip 2 (one-dot chain line in the drawing). On the other hand, it was formed so as to be inclined at an inclination angle θ.
Further, the pen nib 2 is press-fitted and attached to the pen nib 4, the pen nib 4 is press-fit into the neck cylinder 5 fixed to the shaft cylinder 3, and the connecting cylinder 6 formed at the rear part of the neck cylinder 5 is attached to the shaft cylinder. 3 was press-fitted into the ink tank 7 disposed in the tank 3 and mounted.
[0015]
In addition, the ink outflow structure of the writing instrument 1 of the present embodiment is such that the ink in the ink tank 7 first flows out to the connection cylinder 6 and then forms the storage groove 8 and the pen tip 2 formed in the pen core 4. After passing through the ink flow path 9 formed in a minute gap between the thin metal members 2a and 2b and reaching the tip edges 2c and 2d of the nib 2, the gap at the tip of the nib 2 (not shown) In addition, the ink is transferred onto the paper surface through the slits 10 provided at the leading edges 2c and 2d. Further, in this embodiment, the air hole 11 is provided in front of the pen core 4 so that the ink can smoothly flow out of the ink tank 7.
[0016]
Next, a detailed description of the pen tip of this embodiment will be given. FIG. 3 is a schematic view at the time of assembling the pen tip in the embodiment of the present invention. FIG. 4 shows a schematic view of the pen tip in the embodiment of the present invention.
In this example, the four metal spacers 12a, 12b, 12c, and 12d were overlapped with each other between the back surfaces of the thin metal members 2a and 2b, and then assembled by performing spot welding from the surface to the spacer portion.
Since the four spacers are formed thinner toward the front, the gap in the ink flow path 9 is narrower at the front than the rear, and as a result, the capillary force at the front is effective. It becomes stronger than the capillary force of the rear part, and urges the ink in the ink flow path 9 to flow forward. Further, in this embodiment, since the burrs generated when the front end edges 2c and 2d are pressed are set to warp to the back side of the members to be overlapped with each other, the front end portion becomes particularly narrow and a more preferable form is obtained. .
[0017]
As shown in FIG. 3, in this embodiment, the inclination angle θ is formed on the tip edges 2 c and 2 d of the nib 2 before the thin metal members 2 a and 2 b are overlapped with each other.
As in the present embodiment, before the thin metal members 2a and 2b are overlapped with each other, the inclination angle θ is formed on the leading edges 2c and 2d of the thin metal members 2a and 2b. Unlike the case where the inclination angle θ is formed by pressing or polishing after the fixed assembly, there is an effect that the setting of the gap in the ink flow path 9 is not changed by post-assembly after assembly.
[0018]
Next, a test (test 1) conducted by the inventor of the present invention in order to examine the relationship between the magnitude of the inclination angle θ in the pen tip 2 of the present embodiment and the workability during assembly will be described.
In Test 1, the inventor prepared 100 pieces of thin metal plates 2a and 2b having 10 kinds of inclination angles with the inclination angle θ changed in 5 ° increments from 5 ° to 50 ° as test specimens. The test specimens are placed separately on each other, overlapped so that the inclination direction is the same direction while recognizing the direction of the inclination angle θ of the thin metal members 2a, 2b taken by the tester with the left and right hands, and again the work table The tester evaluates workability with respect to the magnitude of each inclination angle when performing the work of placing on the surface. The results of Test 1 are shown in Table 1.
[0019]
[Table 1]

[0020]
As shown in Table 1, when the inclination angle θ was 20 ° or less, the evaluation decreased as the inclination angle became smaller. This is because the visibility of the tilt angle becomes worse as the tilt angle becomes smaller.
When the inclination angle θ was 40 ° or more, the evaluation was lowered as the inclination angle was increased. This was to warn that the worker would be injured at the acute angle portion of the tip edge as the inclination angle increased.
In addition, when the inclination angle θ is 20 ° to 40 °, the evaluation is the highest. This is because the inclination angle during this period has good visibility, and the worker does not watch out for the acute angle portion.
[0021]
Next, a test (test 2) conducted by the inventor of the present invention in order to examine the relationship between the magnitude of the inclination angle θ and the writing operability in the nib 2 of the present invention will be described.
In Test 2, a writing instrument 1 provided with ten types of pen nibs 2 with an inclination angle θ changed from 5 ° to 50 ° in increments of 5 ° was prepared as a test body, and the ten types of prepared writing tools 1 and paper were tested. Handing over to 50 employees who became testers in 1 and when the tester writes various characters and patterns, the tester evaluates the writing feeling and operability of each inclination angle. . The results of Test 2 are shown in Table 2.
[0022]
[Table 2]

[0023]
As shown in Table 2, when the inclination angle θ was 15 ° or less, the evaluation decreased as the inclination angle became smaller. This is because the pen tip pressure and ink discharge become better as the tilt angle becomes smaller, but it becomes difficult to determine the tip edge tilt direction, and the direction of the pen tip that makes contact with the paper surface at the beginning of writing It was because it became difficult to judge.
When the inclination angle θ was 35 ° or more, the evaluation was lowered as the inclination angle was increased. This is because as the tilt angle increases, the distance from the pen core to the tip edge varies greatly on the left and right, so the ink discharge amount varies on the left and right, and the elasticity of the pen tip varies greatly on the left and right. This was because the writing pressure varied.
In addition, when the inclination angle θ is 15 ° to 35 °, the evaluation is the highest. This is because the inclination angle during this time is good when the tip edge is brought into contact with the paper surface during writing, the ink discharge amount is stable on the left and right, and the elasticity of the pen tip is good on both the left and right sides. For this reason, the writing pressure is stabilized, and both thin metal members are elastically deformed and displaced properly, so that the ink residue adhering to the ink flow path can be discharged from the flow path.
[0024]
In view of the above test results, the pen tip 2 of the present embodiment has an inclination angle of the leading edges 2c and 2d of the thin metal members 2a and 2b in consideration of both workability during assembly work and writing operability during writing. The inventor has determined that θ is preferably selected in the range of 15 ° to 40 °, and more preferably in the range of 20 ° to 35 °.
[0025]
FIG. 6 is a schematic view at the time of assembling the pen tip in another embodiment of the present invention.
As shown in FIG. 6, in another embodiment, before the thin metal members 2a and 2b are overlapped with each other, the inclination angle θ is formed on the tip edges 2c and 2d of the pen tip 2, and the intermediate portion is parallel to the tip edge. The curved portions 2e and 2f were molded so as to bulge outward. The other form is the same nib as the above-mentioned Example. In addition, when the test 1 and the test 2 were performed in the same manner as described above with the pen tip of another example, the same evaluation result was obtained. However, as a difference from the above-described embodiment, when the thin metal members 2a and 2b are overlapped with each other at the time of assembling, both the direction of the inclination angle θ of the leading edge and the direction of the curved portions 2e and 2f There was a difference that it could be distinguished. This is because, when the thin metal members 2a and 2b of other embodiments are correctly stacked, the curved portions 2e and 2f face outward as shown in FIG. In the case of assembling, there is only a small gap between the members as shown in FIG. 8, or both members are warped as shown in FIG. In other words, the other embodiment is a more preferable mode because the front and back sides can be determined in addition to the inclination direction of the leading edges 2c and 2d.
[0026]
【The invention's effect】
As described above, the nib according to the present invention uses a sheet metal material, so that it has excellent durability and elasticity, can be used in a stable state for a long time, and the tip edge of the sheet metal member. By selecting the inclination angle θ in the range of 15 ° to 40 °, the writing operability during writing is good and the operability during assembling work is improved. The effect is further improved by selecting the inclination angle θ in the range of 20 ° to 35 °.
[Brief description of the drawings]
FIG. 1 shows a longitudinal sectional view of a writing instrument in an embodiment of the present invention.
FIG. 2 is a general view of a writing instrument in an embodiment of the present invention.
FIG. 3 is a schematic view of a pen tip assembly operation in the embodiment of the present invention.
FIG. 4 is a schematic view of a pen tip in an embodiment of the present invention.
FIG. 5 shows a schematic view of a pen nib assembled with the front and back of a thin metal material being mistaken.
FIG. 6 is a schematic view at the time of assembling the pen tip in another embodiment.
FIG. 7 is a schematic view of a pen tip according to another embodiment.
FIG. 8 is a schematic view of a pen nib assembled with the front and back sides of a thin metal material being mistaken.
FIG. 9 is a schematic view of a pen nib assembled with the front and back of a thin metal material being mistaken.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Writing instrument 2 Pen tip 2a Thin metal member 2b Thin metal member 2c Tip edge 2d Tip edge 2e Curved part 2f Curved part 3 Shaft cylinder 4 Pen core 5 Neck cylinder 6 Connection cylinder 7 Ink tank 8 Storage groove 9 Ink flow path 10 Slit 11 Air hole 12a Spacer 12b Spacer 12c Spacer 12d Spacer

Claims (3)

Two thin metal members are stacked on top of each other, a minute gap-shaped ink flow path is formed over the entire length between the thin metal members, and ink in an ink tank provided inside the shaft cylinder is fixed to the rear part. In the pen tip having a structure for supplying to the ink flow path through the pen core, the leading edge of the two thin metal members is formed by the leading edge and a virtual line direction orthogonal to the full length direction of the pen tip. Protrusions that are formed by pressing so that the inclination angle θ is in the range of 15 ° to 40 °, and gradually thin from the rear to the front between the two thin metal members by forming beads or spacers. formed, the two pieces of sheet metal members, the sheet metal part with burrs during stamping of the leading edge of the sheet metal member is to narrow the gap between the tip portion by superimposing as warp on the back sides By performing spot welding from the surface of the projection to the portion of the protrusion and forming the ink flow path between the thin metal members gradually narrowing from the rear to the front, the capillary force acting between the thin metal members can be increased from the rear. A nib that is assembled so that the front is strong. 2. The pen tip according to claim 1, wherein the inclination angle [theta] is in the range of 20 [deg.] To 35 [deg.]. The sheet metal member is curved substantially parallel to the leading edge so that an intermediate portion of the two sheet metal members opens when the two sheet metal members are overlapped. The nib according to claim 1 or claim 2.

Images