JP2022076395A - Pen core and writing tool - Google Patents

Abstract

To provide a pen core and a writing instrument capable of increasing capillary force and porosity while ensuring durability.SOLUTION: The pen core is composed of a knitted structure in which a metal wire is woven.SELECTED DRAWING: Figure 3

Description

The present invention relates to a pen core and a writing tool.

Patent Document 1 discloses a writing tool having a pen tip (pen core) formed of a synthetic resin to which a metal is added.

Patent Document 2 discloses a writing tool having a pen tip (pen core) formed by bundling metal wires.

Japanese Unexamined Patent Publication No. 59-2029900 Japanese Unexamined Patent Publication No. 2008-273069

In the writing tool disclosed in Patent Document 1, although a metal is added, the pen core is formed by using a synthetic resin, so that the durability of the pen core is insufficient.

In the writing tool disclosed in Patent Document 2, since metal wires are bundled to form a pen core, if the gap between the metal wires is increased, the capillary force decreases, so that the porosity of the pen core (metal wire in cross section) The ratio of the voids excluding the part of) cannot be increased. For this reason, the amount of ink that can be retained in the pen core is limited, and characters may be blurred when writing quickly.

It is an object of the present embodiment to provide a pen core and a writing tool capable of increasing capillary force and porosity while ensuring durability.

The pen core according to the first embodiment of the present application has a knitted structure in which a metal wire is woven.

As described above, since the pen core according to the first embodiment is configured by using a metal wire rod, durability can be ensured as compared with a configuration in which the pen core is formed of a resin material. Further, since the pen core according to the first embodiment has a knitted structure in which a metal wire is woven, the capillary force and the porosity are increased as compared with the structure in which the metal wire is bundled to form the pen core. Be done.

The pen core according to the second embodiment of the present application includes a writing portion that comes into contact with the writing target and a guiding portion for guiding ink to the writing portion, and the density of the guiding portion is higher than that of the writing portion. The density is high, and the cross-sectional area of the guide portion is larger than the cross-sectional area of the writing portion.

As described above, in the pen core according to the second embodiment, since the density of the writing portion is higher than the density of the guiding portion, the writing portion is less likely to be deformed, while the guiding portion can secure a space for holding ink. Further, since the cross-sectional area of the guiding portion is larger than the cross-sectional area of the writing portion, the guiding portion can secure a larger space for holding ink.

The pen core according to the third embodiment of the present application includes a writing portion in contact with a writing target and a guiding portion for guiding ink to the writing portion, and the stump of the metal wire rod is the writing portion. It is arranged inside the above or in the guide portion.

As described above, in the pen core according to the third embodiment, since the stump of the metal wire is arranged inside the writing portion or in the guide portion, the stump of the metal wire is present on the surface of the writing portion. do not. For this reason, the writing part is less likely to be caught by the writing target, and the writing feeling is smooth.

In the pen core according to the fourth embodiment of the present application, the writing portion is formed in a columnar shape, and further, the contact end portion in contact with the writing target has a tapered shape in which the diameter is gradually reduced toward the contact end. The guide portion is formed into a columnar shape having a diameter larger than that of the writing portion, and is integrally formed with the writing portion.

Since the pen core according to the fourth embodiment has the above-mentioned shape, for example, by forming a cylinder having the same outer diameter as the guide portion and then compressing one end portion in the axial direction of the cylinder, the pen core has a shape as described above. A pen core can be formed by forming a writing section with high density. Therefore, according to the configuration of the pen core according to the fourth embodiment, it is easy to manufacture a pen core having a density of the writing portion higher than that of the guiding portion.

In the pen core according to the fifth embodiment of the present application, the writing portion is formed in a prismatic shape, and the contact end face in contact with the writing target is formed obliquely with respect to the axial direction of the pen core, and the guiding portion is formed. Is formed in a prismatic shape having a cross-sectional area larger than the cross-sectional area of the writing portion, and is integrally formed with the writing portion.

Since the pen core according to the fifth embodiment has the above-mentioned shape, for example, after forming a prism having the same outer shape as the guiding portion, the axial end portion of the prism is compressed. A pen core can be formed by forming a writing portion having a high density. Therefore, according to the configuration of the pen core according to the fifth embodiment, it is easy to manufacture a pen core having a density of the writing portion higher than that of the guiding portion.

The writing tool according to the sixth embodiment of the present application is arranged on each of the shaft cylinder and one end and the other end of the shaft cylinder, and the pen described in any one of the first to fifth embodiments. It has a core and.

In the writing tool according to the sixth embodiment, since the pen core is configured by using a metal wire rod, durability can be ensured as compared with a configuration in which the pen core is formed of a resin material. Further, since the pen core is composed of a knitted structure in which a metal wire is woven, the capillary force and the porosity can be increased as compared with the structure in which the pen core is formed by bundling the metal wires.

An embodiment of the present application can provide a pen core and a writing tool capable of increasing capillary force and porosity while ensuring durability.

It is a front view of a marking pen. It is a side view of a marking pen. It is a normal cross-sectional view (A-A line cross-sectional view in FIG. 2) of a marking pen. It is a perspective view of a pen core. It is a perspective view of the pen core shown in FIG. 4 when viewed from a different angle from FIG. It is a front view of the pen core shown in FIG. It is a normal cross-sectional view of the pen core shown in FIG. It is a perspective view of the pen core which concerns on another example. It is a perspective view of the pen core shown in FIG. 8 when viewed from a different angle from FIG. It is a front view of the pen core shown in FIG. It is a side view of the pen core shown in FIG. FIG. 8 is a normal cross-sectional view of the pen core shown in FIG. 8 (cross-sectional view taken along line BB in FIG. 11).

Hereinafter, an example of the embodiment according to the present invention will be described with reference to the drawings. Hereinafter, the marking pen 10 as an example of a writing instrument will be described.

(Structure of marking pen 10)
FIG. 1 is a front view of the marking pen 10. FIG. 2 is a side view of the marking pen 10. FIG. 3 is a normal cross-sectional view of the marking pen 10 (A-A line cross-sectional view in FIG. 2). In the following, the upper end of each member in the drawing will be referred to as the front end, and the lower end of each member will be referred to as the rear end. Since the front end and the rear end of the member are defined for convenience of explanation, the configuration of the marking pen 10 is not limited.

As shown in FIGS. 1, 2 and 3, the marking pen 10 includes a shaft cylinder 20, a pen core 30, a pen core 40, and a batting 50. The axle cylinder 20 is divided at the central portion in the axial direction, and has a front end shaft portion 21 that constitutes a portion on the front end side of the shaft cylinder 20 and a rear end shaft portion 22 that constitutes a portion on the rear end side of the shaft cylinder 20. ,have. The shaft cylinder 20 is formed by connecting the rear end portion of the tip shaft portion 21 and the tip portion of the rear end shaft portion 22. The front end side and the rear end side of the shaft cylinder 20 are reduced diameter portions 23 having a reduced outer diameter, and caps (not shown) are attached to each of the reduced diameter portions 23.

As shown in FIGS. 1 and 2, the pen core 30 is arranged at the tip end portion (an example of one end portion) of the barrel 20, and has a writing portion 32 protruding from the tip end of the barrel 20. The pen core 40 is arranged at the rear end portion (an example of the other end portion) of the barrel 20 and has a writing portion 42 protruding from the rear end of the barrel 20. As shown in FIG. 1, the writing portion 42 of the pen core 40 is wider than the writing portion 32 of the pen core 30 in front view. This makes it possible for the pen core 40 to draw a thicker line than the pen core 30. As shown in FIG. 2, the writing portion 42 of the pen core 40 is narrower than the width (see FIG. 1) of the writing portion 42 in the front view in the side view. The specific configurations of the pen core 30 and the pen core 40 will be described later.

As shown in FIG. 3, the batting 50 is housed in the central portion in the axial direction inside the barrel 20. The batting 50 is impregnated with ink such as water-based ink. The tip of the batting 50 is connected to the pen core 30, and the ink impregnated in the batting 50 is supplied to the pen core 30. The rear end portion of the batting 50 is connected to the pen core 40, and the ink impregnated in the batting 50 is supplied to the pen core 40.

(Structure of pen core 30)
FIG. 4 is a perspective view of the pen core 30. FIG. 5 is a perspective view of the pen core 30 when the pen core 30 is viewed from an angle different from that of FIG. FIG. 6 is a front view of the pen core 30. FIG. 7 is a normal cross-sectional view of the pen core 30.

As shown in FIGS. 4, 5, 6, and 7, the pen core 30 has a writing unit 32 that comes into contact with a writing object such as paper, and a guiding unit 34 for guiding ink to the writing unit 32. Have.

The writing portion 32 is formed in a solid columnar shape, and has a tapered shape in which the tip portion 32A (an example of the contact end portion) in contact with the writing target is gradually reduced in diameter toward the tip (an example of the contact end). It is formed. The guide portion 34 is formed in a solid columnar shape having a diameter larger than that of the writing portion 32. The guide portion 34 has a constant outer diameter in the axial direction. As described above, since the guiding portion 34 has a larger diameter than the writing portion 32, the cross-sectional area of the guiding portion 34 is larger than the cross-sectional area of the writing portion 32.

The writing unit 32 and the guiding unit 34 are arranged coaxially and are integrally configured. The guide portion 34 is connected to the batting 50 by inserting the rear end portion into the batting 50. The guiding portion 34 guides the ink impregnated in the batting 50 to the writing portion 32 by the capillary force.

The pen core 30 is entirely composed of a knitted structure in which a metal wire is woven, including the writing portion 32 and the guiding portion 34. As the material of the metal wire, for example, stainless steel, plated steel, plated iron wire, aluminum, brass, copper, Inconel, titanium, magnesium, tungsten and the like can be used. The wire diameter of the metal wire is, for example, 0.05 mm or more and 0.60 mm or less.

In the present embodiment, the pen core 30 is formed by knitting a metal wire rod into a knitted shape. In the pen core 30, the density of the writing portion 32 is higher than the density of the guiding portion 34. The density is the ratio of the metal wire to the unit area in the cross section.

As an example, the pen core 30 is manufactured as follows. First, a metal wire is woven into a knitted shape to form a cylinder having an outer diameter larger than the maximum outer diameter of the pen core 30 to be manufactured (that is, the outer diameter of the guide portion 34). The cylinder is compressed inward in the radial direction to form a cylinder having the same outer diameter as the outer diameter of the guide portion 34. The density of this cylinder is constant from one end to the other end in the axial direction. One end of the cylinder is further compressed inward in the radial direction to form the writing portion 32. As a result, the pen core 30 is manufactured.

When forming a cylinder with a metal wire in the above manufacturing process, the metal wire is woven from the front end side to the rear end side, which is, for example, the writing portion 32, and the stump of the metal wire rod is after the guide portion 34. Placed on the edge side. Therefore, the stump of the metal wire does not exist on the surface of the writing portion 32. When the stump of the metal wire is inserted inside the cylinder and then compressed, the stump of the metal wire may be arranged on the writing portion 32 side. As described above, in the present embodiment, the stump of the metal wire rod is arranged inside the writing portion 32 or in the guiding portion 34.

In the present embodiment, as described above, one end of a cylinder having a constant density from one end to the other in the axial direction is compressed inward in the radial direction to form the writing portion 32. Therefore, the area (amount) occupied by the metal wire in the cross section of the writing portion 32 and the guiding portion 34 is the same. Further, it can be said that the writing unit 32 has the same density as the guiding unit 34, assuming that it has the same cross-sectional area as the guiding unit 34.

(Structure of pen core 40)
FIG. 8 is a perspective view of the pen core 40. FIG. 9 is a perspective view of the pen core 40 when the pen core 40 is viewed from an angle different from that of FIG. FIG. 10 is a front view of the pen core 40. FIG. 11 is a side view of the pen core 40. FIG. 12 is a normal cross-sectional view of the pen core 40 (cross-sectional view taken along line BB in FIG. 11).

As shown in FIGS. 8, 9, 10, 11 and 12, the pen core 40 has a writing unit 42 that comes into contact with a writing object such as paper and a guiding unit 44 for guiding ink to the writing unit 42. And have.

The writing portion 42 is formed in a solid prismatic shape, and the rear end surface 42A (an example of the contact end surface) in contact with the writing target is oblique with respect to the axial direction X of the pen core 40, as shown in FIG. It is formed. As described above, the writing unit 42 has a width W1 (see FIG. 10) in the front view wider than the width W2 (see FIG. 11) in the side view.

The guide portion 44 is wider than the writing portion 42 in front view and side view, and is formed in a solid prismatic shape. The guide portion 44 has a constant width in the axial direction. As described above, since the guiding portion 44 is wider than the writing portion 42 in the front view and the side view, the cross-sectional area of the guiding portion 44 is larger than the cross-sectional area of the writing portion 42. ..

The writing unit 42 and the guiding unit 44 are arranged coaxially and are integrally configured. The guide portion 44 is connected to the batting 50 by inserting the tip end into the batting 50. The guiding portion 44 guides the ink impregnated in the batting 50 to the writing portion 42 by the capillary force.

Similar to the pen core 30, the pen core 40 is entirely composed of a knitted structure in which a metal wire rod is woven, including the writing portion 42 and the guide portion 44. As the material of the metal wire, for example, stainless steel, plated steel, plated iron wire, aluminum, brass, copper, Inconel, titanium, magnesium, tungsten and the like can be used. The wire diameter of the metal wire is, for example, 0.05 mm or more and 0.60 mm or less.

In the present embodiment, the pen core 40 is formed by knitting a metal wire rod into a knitted shape. In the pen core 40, the density of the writing portion 42 is higher than the density of the guiding portion 44.

As an example, the pen core 40 is manufactured as follows. First, a metal wire is woven into a knitted shape to form a cylinder having an outer diameter larger than the maximum width W3 (see FIG. 10) of the guide portion 44 of the pen core 40 to be manufactured. The cylinder is compressed inward in the radial direction to form a prism having the same outer shape as the guide portion 44. The density of this prism is constant from one end to the other end in the axial direction. One end of the prism is further compressed inward to form the writing portion 42. As a result, the pen core 40 is manufactured.

When forming a cylinder with a metal wire in the above manufacturing process, the metal wire is woven from the rear end side to the tip side of the writing portion 42, for example, and the stump of the metal wire is the tip of the guide portion 44. Placed on the side. Therefore, the stump of the metal wire does not exist on the surface of the writing portion 42. When the stump of the metal wire is inserted inside the cylinder and then compressed, the stump of the metal wire may be arranged on the writing portion 42 side. As described above, in the present embodiment, the stump of the metal wire rod is arranged inside the writing portion 42 or in the guiding portion 44.

In the present embodiment, as described above, one end of a prism having a constant density from one end to the other in the axial direction is compressed inward to form a writing portion 42. Therefore, the area (amount) occupied by the metal wire in the cross section of the writing portion 42 and the guiding portion 44 is the same. Further, it can be said that the writing unit 42 has the same density as the induction unit 44, assuming that the writing unit 42 has the same cross-sectional area as the induction unit 44.

(Action and effect of this embodiment)
As described above, in the marking pen 10, since the pen cores 30 and 40 are configured by using a metal wire, durability can be ensured as compared with the configuration in which the pen cores 30 and 40 are formed of a resin material. High strength can be achieved. Further, in the marking pen 10, since the pen cores 30 and 40 have a knitted structure in which metal wires are woven, the capillary force and the capillary force and the structure as compared with the structure in which the metal wires are bundled to form the pen cores 30 and 40. Porosity can be increased. As a result, even when writing quickly with the marking pen 10, it is possible to prevent the characters from fading.

Further, in the pen cores 30 and 40 of the marking pen 10, since the density of the writing portions 32 and 42 is higher than the density of the guiding portions 34 and 44, the writing portions 32 and 42 are less likely to be deformed, while the guiding portions 34 and 44 have. A space that can hold ink can be secured. Further, since the cross-sectional area of the guiding portions 34 and 44 is larger than the cross-sectional area of the writing portions 32 and 42, the guiding portions 34 and 44 can secure a larger space for holding ink. As a result, the guiding portions 34 and 44 can smoothly guide the ink of the batting 50 to the writing portions 32 and 42.

Further, in the pen cores 30 and 40 of the marking pen 10, since the stump of the metal wire is arranged inside the writing portions 32 and 42 or in the guiding portions 34 and 44, the pen cores 30 and 40 are on the surface of the writing portions 32 and 42. There are no stumps in the metal wire. For this reason, the writing portions 32 and 42 are less likely to be caught by the writing target, resulting in a smooth writing feeling.

Further, in the pen core 30, the writing portion 32 is formed in a columnar shape, and the tip portion 32A is formed in a tapered shape in which the diameter is gradually reduced toward the tip. Further, the guide portion 34 is formed in a columnar shape having a diameter larger than that of the writing portion 32, and is integrally formed with the writing portion 32.

Since the pen core 30 has the above-mentioned shape, for example, after forming a cylinder having the same outer diameter as the guide portion 34, the writing portion having a high density is formed by compressing one end portion in the axial direction of the cylinder. 32 can be formed to form the pen core 30. Therefore, according to the configuration of the pen core 30, it is easy to manufacture a pen core having a higher density of the writing portion 32 than the density of the guiding portion 34.

Further, in the pen core 40, the writing portion 42 is formed in a prismatic shape, and the rear end surface 42A is formed obliquely with respect to the axial direction of the pen core 40. Further, the guide portion 44 is formed in a prismatic shape having a cross section larger than that of the writing portion 42, and is integrally formed with the writing portion 42.

Since the pen core 40 has the above-mentioned shape, for example, after forming a prism having the same outer shape as the guide portion 44, the writing portion having a high density is formed by compressing one end of the prism in the axial direction. 42 can be formed to form the pen core 40. Therefore, according to the configuration of the pen core 40, it is easy to manufacture a pen core having a higher density of the writing portion 42 than the density of the guiding portion 44.

(Modification example)
In the present embodiment, the marking pen 10 has been described as an example of a writing instrument, but the present invention is not limited to this, and any writing instrument to which a pen core is applied may be used.

Further, in the present embodiment, the marking pen 10 is provided with pen cores 30 and 40 at both ends, but the marking pen 10 is not limited to this, and may be configured to have a pen core 30 or a pen core 40 at one end.

Further, in the present embodiment, in the pen cores 30 and 40, the density of the writing portions 32 and 42 is higher than the density of the guiding portions 34 and 44, but the density is not limited to this and the density of the guiding portions 34 and 44. The densities of the writing units 32 and 42 may be the same.

Further, in the present embodiment, in the pen cores 30 and 40, the cross-sectional area of the guide portions 34 and 44 is larger than the cross-sectional area of the writing portions 32 and 42, but the cross-sectional area of the guide portions 34 and 44 is not limited to this. The cross-sectional area may be equal to or less than the cross-sectional area of the writing units 32 and 42.

Further, in the present embodiment, the batting 50 is impregnated with ink, but the present invention is not limited to this, and the ink may be directly stored in the barrel 20.

The present invention can be used for pen cores and writing tools.

10 Marking pen 20 Shaft cylinder 21 Tip shaft 22 Rear end shaft 23 Reduced diameter 30 Pen core 32 Writing part 32A Tip 34 Guide part 40 Pen core 42 Writing part 42A Rear end surface 44 Guide part 50 Batting

Claims (6)

A pen core with a knitted structure in which metal wires are woven. The writing department that comes into contact with the writing target,
An induction unit for inducing ink to the writing unit,
Equipped with
The density of the writing part is higher than the density of the guiding part,
The cross-sectional area of the guide portion is larger than the cross-sectional area of the writing portion.
The pen core according to claim 1. The writing department that comes into contact with the writing target,
An induction unit for inducing ink to the writing unit,
Equipped with
The stump of the metal wire is arranged inside the writing portion or in the guiding portion.
The pen core according to claim 1 or 2. The writing portion is formed in a columnar shape, and further, the contact end portion in contact with the writing target is formed in a tapered shape in which the diameter is gradually reduced toward the contact end.
The pen core according to claim 2 or 3, wherein the guide portion is formed in a columnar shape having a diameter larger than that of the writing portion, and is integrally formed with the writing portion. The writing portion is formed in a prismatic shape, and the contact end face in contact with the writing target is formed obliquely with respect to the axial direction of the pen core.
The pen core according to claim 2 or 3, wherein the guide portion is formed in a prismatic shape having a cross section larger than that of the writing portion, and is integrally formed with the writing portion. With the shaft tube
The pen core according to any one of claims 1 to 5, which is arranged at each of one end and the other end of the barrel.
Stationery equipped with.

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