applicator

Abstract

To provide an applicator capable of drawing a double-line between which a large gap is not formed, with one stroke, and capable of stably drawing the double-line for a long period.SOLUTION: An applicator has an application body part and makes the application body part contact with an application object to apply an application liquid. At least one of the application body parts is formed, including a first application body part 16 and a second application body part 17 arranged in parallel. The second application body part 17 has a thin shaft portion 53c, and a thick shaft portion 54 formed to be thicker than the thin shaft portion 53c. The thin shaft portion 53 is formed on a tip end side part of the second application body part 17 and at a position adjacent to a tip end side of the thick shaft portion 54.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The present invention relates to an applicator that supplies a built-in application liquid to an applicator body such as a pen tip. [Background technology]

[0002] Applicators having a pen tip made of felt, synthetic resin, etc., such as a marking pen, are widely known. Among such applicators, there is an applicator that can draw a double line with a single stroke.

[0003] For example, Patent Document 1 discloses a marking pen having two separately molded nib sections. This marking pen has a nib section for drawing wide lines (hereinafter referred to as the wide nib section) and a nib section for drawing narrow lines (hereinafter referred to as the narrow nib section). The two nib sections are arranged side by side so that the tip positions of these two nib sections are flush with each other.

[0004] This marking pen has a gap between the tip of the wide nib and the tip of the narrow nib (see, for example, Figure 1 of Patent Document 1). As a result, when a line is drawn on paper or the like, the drawn line appears as two parallel lines with a gap between them. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 01-258999 Summary of the Invention [Problem to be solved by the invention]

[0006] Meanwhile, in addition to marking pens that can draw double lines with a single stroke, with a large gap between the two lines like conventional marking pens, there has been a demand on the market for pens that can draw double lines with a single stroke, with no gap between the two lines, or with a small, inconspicuous gap between the two lines. Therefore, the inventors conceived the idea of ​​thinning the narrow nib portion and bringing it closer to the wide nib portion, thereby enabling the drawing of a double line with a fine, inconspicuous gap between the two lines. However, when the narrow nib portion is thinned, problems arise, such as the narrow nib portion being damaged or shifting in position with continued use of the marking pen. In other words, when the entire narrow nib portion is thinned, the strength of the narrow nib portion becomes insufficient and it becomes more likely to shift in position. This problem becomes more pronounced when the marking pen is used for a certain period of time.

[0007] Therefore, an object of the present invention is to provide an applicator that can draw double lines in one stroke without leaving a large gap between the two lines, and that can stably draw double lines over a long period of time. [Means for solving the problem]

[0008] One aspect of the present invention for solving the above problem is an applicator having an applicator part, which is brought into contact with an object to be coated to apply an application liquid, at least one of the applicator parts being formed to include a first applicator part and a second applicator part arranged side by side, the second applicator part having a thin shaft part and a thick shaft part formed thicker than the thin shaft part, the thin shaft part being a tip end portion of the second applicator part and being formed in a position adjacent to the tip end of the thick shaft part, the first applicator part and the second applicator part being brought into contact with the object to be coated in a multiple contact state, and being slidable in an application direction which is one of horizontal directions while maintaining the multiple contact state. and a second line formed by applying the coating liquid by the second applicator body, the first line being thicker than the second line; the second applicator body having a first step portion which is a step formed at a boundary between the thin shaft portion and the thick shaft portion; the first applicator body having a housing groove formed therein capable of housing at least a part of the second applicator body; the housing groove having a groove-side step portion which is a step formed therein; and the groove-side step portion and the first step portion extending from the tip side of the second applicator body to the housing groove. order This is an applicator characterized by the fact that the adhesive is arranged in a line.

[0009] According to this aspect, it is possible to draw a double line in one stroke by bringing the tip end portion of the first applicator body and the tip end portion of the second applicator body close together, without leaving a large gap between the two lines, and it is also possible to provide sufficient strength to the second applicator body.

[0010] In the above aspect, the second application body has a first step portion which is a step formed at a boundary portion between the thin shaft portion and the thick shaft portion. do.

[0011] According to this aspect, by bringing the first step portion into contact with another member, it is possible to more reliably prevent the second applying body from becoming misaligned.

[0012] In the above aspect, it is preferable that the first application body portion has a accommodating groove portion formed therein that can accommodate at least a portion of the second application body portion, and that the accommodating groove portion has a groove side step portion that is a step formed therein, and that the first step portion and the groove side step portion contact each other.

[0013] According to this aspect, it is possible to more reliably prevent the second applicator body from becoming misaligned.

[0014] In the preferred aspect described above, the second applicator body has a base-side shaft portion, which is formed at a position adjacent to the thick shaft portion, and the thick shaft portion and the base-side shaft portion are arranged in that order from the tip side, and the second applicator body has a second step portion which is a step formed at the boundary between the thick shaft portion and the base-side shaft portion, and further has a tip stopper member in which a part of the first applicator body and a part of the second applicator body are housed, and it is even more preferred that the second step portion comes into contact with the step portion formed in the tip stopper member.

[0015] According to this aspect, it is possible to provide a structure in which the second applicator part is more unlikely to become displaced.

[0016] The above-described aspect has a tip stopper member, the tip stopper member having a tip-side accommodating portion in which a portion of the first application body and a portion of the second application body are accommodated, the tip-side portions of the first application body and the second application body are both located tip-side relative to the tip-side accommodating portion, the tip stopper member has a first protrusion portion and a second protrusion portion tip-side relative to the tip-side accommodating portion, the first protrusion portion and the second protrusion portion both protrude toward the tip side, and it is preferable that the first protrusion portion is located to the side of the tip-side portion of the first application body and the second protrusion portion is located to the side of the tip-side portion of the second application body.

[0017] According to this aspect, it is possible to more reliably prevent the first and second applicator bodies from being misaligned due to a force being applied to the pen tip when drawing a line.

[0018] It is preferable that the above-mentioned aspect be such that by changing the writing angle in the multiple contact state, it is possible to switch between a state in which a double line having a gap between the first line and the second line can be written, and a state in which a double line without a gap between the first line and the second line can be written. In the above aspect, it is preferable that the first applicator body has a tip-side curved surface portion that extends from a part of one side surface portion through a tip portion to a part of the other side surface portion, and that the distance from the tip-side curved surface portion to the tip portion of the second applicator body is 0.5 mm or more and 1.0 mm or less. [Effects of the Invention]

[0019] According to the present invention, it is possible to provide an applicator that can draw double lines in one stroke without leaving a large gap between the two lines, and that can stably draw double lines over a long period of time. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a perspective view showing an applicator according to an embodiment of the present invention. [Figure 2] FIG. 2 is a cross-sectional view showing the applicator of FIG. 1. [Figure 3] FIG. 3 is a perspective view showing the first pen tip member of FIG. 2. [Figure 4] 4 is a perspective view of the first pen tip member of FIG. 3, seen from a different direction. FIG. [Figure 5] 4A to 4C are side views showing the first pen tip member of FIG. 3, with (a) to (c) showing the state as seen from different directions. [Figure 6] FIG. 4 is a vertical cross-sectional view showing the first pen tip member of FIG. 3. [Figure 7] 4A and 4B are diagrams showing the first pen tip member of FIG. 3, in which (a) is a front view seen from the front side, and (b) is a rear view seen from the rear side. [Figure 8] 3A and 3B are diagrams showing the second pen tip member of FIG. 2, in which (a) is a perspective view and (b) is a side view. [Figure 9] 3 is an enlarged cross-sectional view showing the periphery of the first pen tip portion of FIG. 2. FIG. [Figure 10] 3A and 3B are views showing the tip plug member of FIG. 2, in which (a) is a perspective view seen from the front side, and (b) is a perspective view seen from the rear side. [Figure 11] FIG. 3 is a cross-sectional view showing the tip plug member of FIG. 2. [Figure 12]10(b) is a side view, and FIG. 10(c) is a cross-sectional view showing the first support protrusion portion and its surroundings of the tip plug member shown in FIG. 10(a). [Figure 13] 3(a) is a cross-sectional perspective view of the tip plug member of FIG. 2 as seen from the rear side, and FIG. 3(b) is a cross-sectional perspective view of the tip plug member of FIG. 2 as seen from the front side. [Figure 14] 9(a) is a front view of the tip plug member of FIG. 2 as seen from the front side, and FIG. 9(b) is a rear view of the tip plug member of FIG. 9 as seen from the rear side. [Figure 15] 3 is a cross-sectional view showing the cross sections of the tip plug member, the first ink occlusion body, and the second ink occlusion body of FIG. 2. FIG. [Figure 16] FIG. 3 is an explanatory diagram showing a schematic view of the applicator of FIG. 2 as seen from the front. [Figure 17] 3 is a perspective view showing the periphery of a first pen tip portion of the applicator of FIG. 2. FIG. [Figure 18] 3 is a side view showing the periphery of a first pen tip portion of the applicator of FIG. 2. FIG. [Figure 19] 3 is an explanatory diagram showing a state in which a first pen tip portion of the applicator of FIG. 2 is brought into contact with an object to be applied. FIG. [Figure 20] FIG. 2 is an explanatory diagram schematically showing how a double line is drawn on an object to be coated with the applicator of FIG. 1. [Figure 21] The left figure is an explanatory diagram showing the part where the coating liquid is applied to the object to be coated when drawing a double line with the first pen tip part, and the right figure is a schematic diagram showing the multiple lines drawn by applying the coating liquid in the part shown in the left figure, with (a) and (b) showing the applicator in an upright position and a horizontal position. [Figure 22] 3 is a side view showing the periphery of the first pen tip portion of the applicator of FIG. 2 when the first pen tip portion is in contact with an object to be coated and the applicator is in an upright position. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0021] Hereinafter, an embodiment of the present invention will be described. Note that the applicator in this specification includes writing implements such as felt-tip pens, line markers, and whiteboard markers, as well as implements for applying liquids such as ink to any object such as paper or a whiteboard.

[0022] 1, the applicator 1 of this embodiment has a main body tube 2 (barrel tube), a first nib portion 3 (applicator body portion), and a second nib portion 4 (applicator body portion). In other words, this applicator 1 has a nib portion (first nib portion 3, second nib portion 4) on each end of the main body tube 2 in the longitudinal direction, and both sides of the main body tube 2 can be used. In other words, the application liquid can be applied using either nib portion provided on either end in the longitudinal direction. In the following description, the relationship between "front and back" will be described with the first pen tip portion 3 side as the front side and the second pen tip portion 4 side as the rear side, unless otherwise specified.

[0023] One longitudinal end (front end) of the main body tube 2 is an open end, to which a tip plug member 5 is attached. As shown in Fig. 2, the interior of the applicator 1 contains two ink occlusion bodies, namely, a first ink occlusion body 6 (applicant liquid occlusion body) and a second ink occlusion body 7 (applicant liquid occlusion body).

[0024] 1 and 2, the main body tube 2 is a hollow member having a generally cylindrical shape, and serves as a barrel that forms the pen barrel (main body barrel). As shown in Fig. 2, an internal space (storage space) is formed throughout the entire longitudinal direction. The longitudinal direction of the main body tube 2 is the longitudinal direction of the applicator 1, and is also the front-to-rear direction.

[0025] The first pen tip unit 3 is composed of multiple pen tip members, including a first pen tip member 16 (first application body) and a second pen tip member 17 (second application body). As a result, the first pen tip unit 3 can draw two lines that extend parallel to each other (this will be described in detail later).

[0026] The first pen tip member 16 is a sintered core (porous body) formed by applying heat to powder such as plastic powder, and has continuous pores. In other words, it is a member that can absorb ink (coating liquid) by capillary action and move it to the pen tip side (front side).

[0027] 3, the first pen tip member 16 of this embodiment has a pen tip forming portion 20 (tip side portion) that forms the pen tip, and a base end side portion 21 (base end side portion) located on the rear side thereof. The pen tip forming portion 20 is elastically deformable and is more easily deformed than the base end side portion 21, which is the rear portion. Specifically, when the sintering powder used as the raw material for the nib forming portion 20 is designated as the first sintering powder and the sintering powder used as the raw material for the base end side portion 21 is designated as the second sintering powder, the first sintering powder has a smaller particle diameter than the second sintering powder. Note that "smaller particle diameter" here means that the average particle diameter of particles randomly selected in the same number (predetermined number N) from each is small. Furthermore, the density of the raw sintering powder differs between the pen tip forming portion 20 and the base end side portion 21. Note that the "density" here refers to the density of the particles; for example, if the particles are densely packed, it is dense, and if the particles are sparse, it is sparse. Comparing the pen tip forming portion 20 and the base end side portion 21, the pen tip forming portion 20 is denser than the base end side portion 21, and the maximum value of the center-to-center distance between the particles is smaller. As described above, in the first pen tip member 16 of this embodiment, the pen tip forming portion 20 is more easily deformed than the base end side portion 21, resulting in a soft writing feel.

[0028] The first sintering powder in this embodiment is a mixture of multiple types (2 to 3 types) of powders of the same material (substance) but different particle diameters. The second sintering powder is also a mixture of multiple types of powders of the same material (substance) but different particle diameters. Here, the first sintering powder and the second sintering powder may be powders of the same material. For example, the first sintering powder may be a mixture of powder α1 and powder α2, where powder α1 and powder α2 are both powders of material α but have different particle sizes. In this case, the second sintering powder may also be a mixture of powder α1 and powder α2. The ratio of powder α1 to powder α2 in the first sintering powder and the ratio of powder α1 to powder α2 in the second sintering powder may be different to make the powders different overall. That is, the sintering powder may be one type of powder or a mixture of two or more types of powder. When two or more types of powder are mixed, the powders may be made of the same material but with different particle diameters. The number of powders constituting the first sintering powder and the second sintering powder may be the same or different. For example, as described above, each may be composed of two types of powder (powder α1, powder α2), or one may be composed of one type of powder and the other may be composed of three types of powder.

[0029] Moreover, when the overall shape of the first pen tip member 16 is taken into consideration, it is divided into a pen tip side portion 22 (tip side portion), an intermediate portion 23, and a rear side thin shaft portion 24 (base side portion), as shown in Figure 3. The pen tip side portion 22 is a portion formed to include the pen tip forming portion 20 described above, and is a portion that is relatively easy to deform.

[0030] As shown in Figures 3 and 5(a), the pen tip side portion 22 has a tip surface portion 28 (tip surface portion, tip side curved surface portion), two inclined surface portions 29, a lateral curved surface portion 30 (first application body side curved portion), a first connecting portion 31, and a second connecting portion 32. The first connecting portion 31 is a portion located between the tip surface portion 28 and the two inclined surface portions 29 and the side curved surface portion 30. The second connecting portion 32 is a portion located between the tip surface portion 28 and the two inclined surface portions 29 and the storage groove portion 35 (described in detail later). The pen tip side portion 22 is formed such that the length in the application direction X (left-right direction in FIG. 7(a)) decreases toward the front (pen tip side) (see FIGS. 5(b) and 5(c)). The application direction X is one of the horizontal directions, and is the direction in which the applicator 1 is moved when drawing the desired line (multiple lines, double lines in this embodiment) (see FIG. 20, etc.).

[0031] As shown in Fig. 3 and other figures, the tip surface portion 28 is a curved surface portion located on the tip side. That is, it extends in a partially curved manner from one side in the application direction X (see Fig. 7(a) and other figures) through the tip portion to the opposite side in the application direction X. That is, the tip surface portion 28 has a rounded, convex shape facing forward. 3 and the like, the end of tip surface portion 28 on the side of side curved surface portion 30 is located forward (above in FIG. 3) of the end on the side of storage groove portion 35. In other words, tip surface portion 28 is also a portion that extends obliquely so as to move forward as it approaches side curved surface portion 30.

[0032] As shown in Figures 3, 5(c), etc., the inclined surface portions 29 are formed one by one at positions spaced apart in the application direction X, and the front end portions of all of them are continuous with the tip surface portion 28. 3, 5(c), etc., the inclined surface portion 29 is an inclined surface portion that inclines outward in the application direction X as it moves toward the rear side. In addition, the inclined surface portion 29 is also an inclined surface portion that inclines inward in the application direction X as it moves from the side curved surface portion 30 toward the storage groove portion 35.

[0033] 3, 5(a), etc., the lateral curved surface portion 30 is a portion located on the opposite side from the storage groove portion 35, and forms a curved surface portion that becomes part of the side surface of the nib side portion 22. Specifically, as shown in Fig. 7(a), it is a curved surface portion that is convex outward in a plan view seen from the front side (nib side), and forms a curved surface portion that extends in the circumferential direction of the first nib member 16. As shown in Fig. 5(b), this side curved surface portion 30 is a curved surface portion that has a substantially triangular shape in a plan view seen from the opposite side to the storage groove portion 35. That is, the length in the width direction (circumferential direction of the first pen tip member 16) increases toward the rear side (right side in Fig. 5(b)). The "plan view from the opposite side of the storage groove portion 35" is a plan view in which the line of sight is perpendicular to the front-rear direction and the application direction X. This "direction perpendicular to the front-rear direction and the application direction X" is the front-rear direction in Figure 5(b), and will hereinafter also be referred to as the perpendicular direction. This perpendicular direction is also the direction in which the first pen tip member 16 and the second pen tip member 17 are arranged side by side.

[0034] That is, the lateral curved surface portion 30 extends from one side in the application direction X, through the side portion opposite the side on which the accommodating groove portion 35 is formed, to the other side in the application direction X. As shown in Fig. 5(a), the side curved surface portion 30 is also a portion that extends while gently curving toward the housing groove portion 35 (the lower side in Fig. 5(a)) as it moves forward. In other words, it is also a portion that extends inward in a direction perpendicular to the front-to-rear direction (the perpendicular direction).

[0035] The first connecting portion 31 is a portion that extends while forming rounded corners. That is, it is a portion that extends while forming a curved surface (R surface). As shown in FIGS. 5(a) and 5(b), this first connecting portion 31 is also a portion that extends from the rear on one side in the application direction X to the front, turns back at the front, and extends in an arched shape to the rear on the other side in the application direction X. At this time, it is formed so that its width increases toward the front end.

[0036] As shown in Figures 3 and 5(a), the front portion (left side in Figure 5(a)) of the second connecting portion 32 is located closer to the lateral curved surface portion 30 than the rear portion. As shown in Figure 3 and other figures, the front portion of the second connecting portion 32 is a portion that extends while forming rounded corners. In other words, it is a portion that extends while forming a curved surface (R surface), and extends in an arched shape so as to be convex forward (see Figure 5(c) and other figures). The rear portion of the second connecting portion 32 also has portions that extend while forming rounded corners at the portion adjacent to the inclined surface portion 29 and the portion adjacent to the storage groove portion 35.

[0037] As shown in Fig. 3 etc., intermediate portion 23 is a portion having a roughly cylindrical shape. Most (50 percent or more) of the side surface of intermediate portion 23 is intermediate curved surface portion 23a (first applicator-side curved portion), which is a curved surface portion that continues in the circumferential direction of first pen tip member 16. In detail, most of the side surface, excluding the portion where storage groove portion 35 is formed and the adjacent portion, is intermediate curved surface portion 23a.

[0038] 3 and other figures, the first pen tip member 16 of this embodiment has a concave groove, that is, a storage groove portion 35. The storage groove portion 35 is a groove formed across the pen tip side portion 22 and the middle portion 23, and extends in the front-to-rear direction. In detail, the storage groove portion 35 is a groove recessed inward in an orthogonal direction (front-to-back direction, a direction perpendicular to the application direction X), and has a storage groove tip side portion 35a formed in the pen tip side portion 22 and a storage groove base side portion 35b formed in the middle portion 23.

[0039] 3 and other figures, the storage groove tip side portion 35a and the storage groove base side portion 35b are aligned in this order from the front in the front-to-back direction (the up-and-down direction in FIG. 3), forming a continuous groove, the storage groove portion 35. The storage groove portion 35 is a groove that extends linearly from near the front end of the pen tip side portion 22 to near the rear end of the intermediate portion 23.

[0040] As shown in Fig. 3 and other figures, the leading end portion (front portion) of the storage groove leading end side portion 35a is formed so that the groove width narrows toward the leading end (forward). Also, as shown in Figs. 3 and 6, the leading end portion of the storage groove leading end side portion 35a has a groove wall length that shortens toward the leading end. That is, the leading end portion of the storage groove leading end side portion 35a has an arc-shaped cross section, and the length of the arc of the cross section of each portion shortens toward the leading end (detailed illustration is omitted).

[0041] Furthermore, as shown in Figures 3, 4, and 7, the base end portion (rear portion) of the storage groove tip side portion 35a and the storage groove base end side portion 35b are grooves whose cross-sectional shape is arc-shaped (approximately semicircular), and the groove wall portion and the groove bottom portion form curved surfaces. 7(b) and other figures, the groove width of the base end portion of the storage groove tip side portion 35a is shorter than the groove width of the storage groove base end side portion 35b, and the base end portion of the storage groove tip side portion 35a is shallower than the storage groove base end side portion 35b. In other words, the groove bottom portion of the base end portion of the storage groove tip side portion 35a is located outward in the orthogonal direction (the up-down direction in FIG. 7(b)) than the groove bottom portion of the storage groove base end side portion 35b.

[0042] Here, in the middle part of the accommodating groove portion 35, which is the boundary between the accommodating groove tip side portion 35a and the accommodating groove base side portion 35b, a step portion, i.e., an internal accommodating groove step portion 37 (groove side step portion), is formed, as shown in Figures 4, 6, etc.

[0043] 3, 4, etc., the rear thin shaft portion 24 is a rod-shaped body extending rearward from the rear end surface (portion on the base end side) of the intermediate portion 23, and becomes thinner toward the rear end side. That is, the area of ​​the cross section becomes smaller toward the rear end side, and the area of ​​the rear end surface is smaller than the area of ​​the cross section of each portion. 7(b), the rear thin shaft portion 24 is formed at a position spaced apart from the inside of any part of the periphery of the intermediate portion 23. In other words, it is formed at a position spaced apart from the inside of both the intermediate curved surface portion 23a and the accommodation groove portion 35.

[0044] The second pen tip member 17 is a rod-shaped pen tip chip, as shown in Figure 8 etc. Specifically, from the front end side (pen tip side), a tip side portion 53, a thick shaft portion 54, and a base side portion 55 (base side shaft portion) are arranged in parallel and integrally formed.

[0045] The tip side portion 53 has a substantially hemispherical tip contact portion 53a located on the front end side, a tapered portion 53b adjacent to the rear side thereof, and a tip side thin shaft portion 53c (thin shaft portion) adjacent to the rear side thereof. The tapered portion 53b is a portion having a generally truncated cone shape, and its diameter increases toward the rear. In other words, it becomes thicker (the cross-sectional area increases) toward the rear. The tip-side thin shaft portion 53c is a thin rod-like portion having a generally cylindrical shape that extends in the front-rear direction.

[0046] The thick shaft portion 54 is a thick rod-like portion that is generally cylindrical and extends in the front-to-rear direction. The thick shaft portion 54 is the thickest portion of the second pen tip member 17.

[0047] The base-end side portion 55 has a tip-side extension portion 55a and a base-end insertion portion 55b, which are formed side by side in the front-to-rear direction. The tip-side extension portion 55a is a thin rod-like portion that is generally cylindrical and extends in the front-to-rear direction. The base-end insertion portion 55b is a long, thin rod-like portion that becomes thinner toward the rear. In other words, the base-end side portion 55 is a long, thin rod-like portion overall, and has a tapered portion in the rear portion that becomes smaller in diameter toward the rear end.

[0048] Here, the tip side portion 53 is a portion that protrudes forward (toward the tip side) from the front end face (end face on the tip side) of the thick shaft portion 54. In detail, it protrudes forward from a position on the front end face of the thick shaft portion 54 that is separated from the inside of any part of the peripheral edge portion. Similarly, the base-end side portion 55 is a portion that protrudes rearward (toward the base end) from the rear end surface (end surface on the base end side) of the thick shaft portion 54. In detail, it protrudes forward from a position on the rear end surface of the thick shaft portion 54 that is spaced inward from any part of the peripheral edge portion.

[0049] That is, thick shaft portion 54 is formed to be thicker than both tip side portion 53 (tip side thin shaft portion 53c) adjacent to it on the front side and base side portion 55 (tip side extension portion 55a) adjacent to it on the rear side. A first step portion 57 is formed at the boundary between thick shaft portion 54 and tip side portion 53, and a second step portion 58 is formed at the boundary between thick shaft portion 54 and base side portion 55. Both first step portion 57 and second step portion 58 are formed to be continuous in an annular shape in the circumferential direction of second pen tip member 17. In other words, the outer circumferential surface of the tip side portion 53 (tip side thin shaft portion 53c) and the outer circumferential surface of the thick shaft portion 54 are continuous via a step, and the outer circumferential surface of the base side portion 55 (tip side extension portion 55a) and the outer circumferential surface of the thick shaft portion 54 are also continuous via a step.

[0050] In this embodiment, the entire distal side portion 53 is formed to be thinner than the thick shaft portion 54. That is, every part of the distal side portion 53 has a smaller cross-sectional area than the thick shaft portion 54. Similarly, the entire proximal side portion 55 is also formed to be thinner than the thick shaft portion 54.

[0051] In this embodiment, the thickness of each portion from the front end to the rear end of thick shaft portion 54 is the same. In other words, the cross-sectional area of ​​thick shaft portion 54 is the same for each portion, and the cross-sectional area of ​​any portion of thick shaft portion 54 is the maximum or minimum value of the cross-sectional area of ​​thick shaft portion 54. However, the thick shaft portion of the second pen tip member 17 may have a portion with a different thickness (a portion with a different cross-sectional area). In this case, when the entire tip side portion 53 is formed thinner than the thick shaft portion 54, the tip side portion 53 may be formed so that the maximum cross-sectional area is smaller than the minimum cross-sectional area of ​​the thick shaft portion 54. Similarly, when the entire base side portion 55, which has portions with different thicknesses in each portion, is formed thinner than the thick shaft portion 54, the base side portion 55 may be formed so that the maximum cross-sectional area is smaller than the minimum cross-sectional area of ​​the thick shaft portion 54.

[0052] The second pen tip member 17 of this embodiment is formed by extruding and stretching a synthetic resin having fine pores inside, leaving these pores. In this embodiment, engineering plastic (polyacetal resin) is used as the synthetic resin. In other words, the second pen tip member 17 of this embodiment is a plastic tip. For the above reasons, the second pen tip member 17 is elastic and has higher abrasion resistance than the first pen tip member 16. Although not shown, the second pen tip member 17 has a slit (opening) in the tip contact portion 53a that serves as an ink outlet, and a slit in the rear end of the base end portion 55 (base end insertion portion 55b) that serves as an ink inlet. An ink passage connecting these front and rear slits is provided inside. This ink passage is a minute hole that transports ink by capillary action. In other words, the second pen tip member 17 is also a member that can move ink (coating liquid) toward the pen tip side (front side).

[0053] As shown in FIGS. 2, 9, etc., the tip plug member 5 is attached in a state where its front portion is exposed to the outside of the main body tube 2 and its rear portion is housed inside the main body tube 2. As shown in Fig. 10, the tip plug member 5 has a front opening 60 and a rear opening 61. As shown in Fig. 11, an internal space 62 is formed over the entire lengthwise direction (front-to-rear direction) between the front opening 60 and the rear opening 61. In other words, the tip plug member 5 is a cylindrical member in which the inside and outside are connected at the front end and the rear end. As shown in Figures 10 and 11, this tip stopper member 5 is provided with a first support protrusion 64 (first protrusion) and a second support protrusion 65 (second protrusion) on the front end side (the tip side of the first pen tip portion 3). Also, a first notch 66 (notch) and a second cutout 67 (notch) are provided on the rear end side. Furthermore, a tip stopper side engaging portion 68 that engages with the inner peripheral surface of the main body tube 2 is provided on the outer peripheral surface of the tip stopper member 5. The first notch 66 and the second cutout 67 are located rearward of the tip stopper side engaging portion 68.

[0054] 11, the internal space 62 of the leading stopper member 5 is partitioned into a front housing section 70, a first rear housing section 71 (first housing section), and a second rear housing section 72 (second housing section). To explain in detail, the leading stopper member 5 has a partition wall section 73 therein, and this partition wall section 73 partitions the rear section (partitioned space) that is part of the internal space 62 into the first rear housing section 71 and the second rear housing section 72. In other words, the partition wall section 73 is disposed at a position that is the boundary between the first rear housing section 71 and the second rear housing section 72. The rear opening 61 is also divided into a first rear opening 61a and a second rear opening 61b by the partition wall 73. The first rear opening 61a is an opening that connects the first rear accommodating section 71 to the outside, and the second rear opening 61b is an opening that connects the second rear accommodating section 72 to the outside.

[0055] Furthermore, inside the tip plug member 5, a standing wall portion 75 is provided at a position adjacent to the rear of the front accommodating portion 70. This standing wall portion 75 is a standing wall portion that separates the front accommodating portion 70 from the rear side space (first rear accommodating portion 71, second rear accommodating portion 72). This standing wall portion 75 is provided with a first communication hole portion 79 and a second communication hole portion 80. The first communication hole portion 79 is a hole that communicates the front accommodating portion 70 and the first rear accommodating portion 71, and penetrates a part of the standing wall portion 75 in the thickness direction. The second communication hole portion 80 is a hole that communicates the front accommodating portion 70 and the second rear accommodating portion 72, and penetrates a part of the standing wall portion 75 in the thickness direction. Although not particularly limited, in this embodiment, the front-to-rear length of the first rear storage section 71 is longer than the front-to-rear length of the second rear storage section 72, and the front end portion of the first rear storage section 71 is located forward of the front end portion of the second rear storage section 72.

[0056] The second communication hole 80 has a pen tip side portion 80a (enlarged diameter portion), an intermediate portion 80b, and a rear portion 80c (narrow diameter portion). The intermediate portion 80b is located between the pen tip side portion 80a and the rear portion 80c, and becomes thinner (has a smaller cross-sectional area) toward the rear portion 80c. The pen tip side portion 80a has a larger diameter (has a larger cross-sectional area) than the rear portion 80c.

[0057] As shown in Figure 10(a) and other figures, the first support protrusion 64 is a protrusion that protrudes forward from the front end surface of the main body of the tip stopper member 5 at a position adjacent to the front opening 60. As shown in Figure 12(a) and other figures, this first support protrusion 64 is also a protrusion that extends in an arc shape in a plan view seen from the front side (pen tip side). In other words, it is also a part that extends along the circumferential direction of the applicator 1 (main body cylinder 2).

[0058] As shown in FIG. 12, the first support protrusion 64 has an outer surface portion 130, an inner surface portion 131 (first protrusion side curved portion), and a tip side missing portion 132. The outer surface portion 130 is a portion located on the outside in a direction perpendicular to the front-to-rear direction (the perpendicular direction), and forms a curved surface that extends in an arc shape in a plan view seen from the front. Also, as shown in Fig. 12(b), the outer surface portion 130 is also a portion that extends while gently curving inward (inward in the perpendicular direction, downward in Fig. 12(b)) as it moves forward.

[0059] The inner surface portion 131 is a portion located on the inside in a direction perpendicular to the front-rear direction (the perpendicular direction), and forms a curved surface that extends in an arc shape in a plan view seen from the front side. The inner surface portion 131 is formed at a position facing and spaced apart from the second support protrusion portion 65 in the perpendicular direction (see FIG. 10, etc.). As shown in Figure 12(a), the tip-side notched portion 132 is formed at a position adjacent to the front side of the inner surface portion 131, and is a portion that extends in an arc shape in a plan view seen from the front. As shown in Figure 12(c) and other figures, this tip-side notched portion 132 forms a surface that faces outward (upward in Figure 12(c)) as it extends forward.

[0060] As shown in Figure 10(a) and other figures, the second support protrusion 65 is a protrusion that protrudes forward from the front end surface of the main body of the tip stopper member 5 at a position adjacent to the front opening 60. A support groove 83 is formed in the second support protrusion 65 at the portion where the inward-facing surface is located. The support groove 83 is a groove that is recessed outward.

[0061] 11 and 13, the front accommodating portion 70 is provided with a support groove forming portion 85. The support groove forming portion 85 is a groove formed on the inner circumferential surface of the front accommodating portion 70 and recessed outward. The support groove forming portion 85 is located behind the support groove portion 83 and forms a continuous groove portion (hereinafter also referred to as a leading stopper groove portion 87) together with the support groove portion 83. That is, the inner surface of the support groove portion 83 (the surface forming the groove bottom and groove walls) and the inner surface of the support groove forming portion 85 form a continuous surface to form the leading stopper groove portion 87. The groove wall of the leading stopper groove 87 is provided with a plurality of (two) support protrusions 88 (see FIG. 10, etc.). The support protrusions 88 are raised from the surrounding area and have rounded tips (see FIG. 16, etc.). The support protrusions 88 extend in the front-rear direction from the front end to the rear end of the leading stopper groove 87. In other words, they extend across the entire leading stopper groove 87.

[0062] 13(b) and other figures, the rear end portion of the leading plug groove portion 87 and the upright wall portion 75 are aligned in the front-to-rear direction. The inner surface of the leading plug groove portion 87 and the inner circumferential surface of the second communication hole portion 80 are continuous with each other via a step. That is, the leading plug member 5 has a leading plug step portion 89 (step portion) at the rear end portion of the leading plug groove portion 87.

[0063] 11, 14(a), etc., the front accommodating portion 70 is provided with a plurality of support rib portions 90. The support rib portions 90 are protrusions that protrude inward from the inner circumferential surface of the front accommodating portion 70 and extend in the front-rear direction. As shown in FIG. 14(a), the plurality of support rib portions 90 are formed at separate positions in the circumferential direction of the front accommodating portion 70. Specifically, the support rib portions 90 are provided on three of the four sides of the inner circumferential surface of the front accommodating portion 70. That is, the support rib portions 90 are provided on the portion opposite the portion where the tip stopper groove portion 87 is formed (the upper portion in FIG. 14(a)), and on two portions that are spaced apart and opposed to each other in the application direction X (the left-right direction in FIG. 14(a)).

[0064] 11, 13, and 14(b), the first rear accommodating portion 71 is provided with a first positioning protrusion 93. The first positioning protrusion 93 is provided behind a portion of the standing wall portion 75 where the first communicating hole portion 79 is formed. The second rear accommodating portion 72 is provided with a second positioning protrusion 94. The second positioning protrusion 94 is provided on the upright wall portion 75, behind the portion where the second communication hole portion 80 is formed.

[0065] Specifically, as shown in FIG. 14(b), three first positioning protrusions 93 are provided in the first rear accommodation section 71. The two first positioning protrusions 93a are each provided so as to surround a flow path forming section 98 (described in detail below), and are protrusions that are approximately U-shaped in rear view (plan view seen from the rear). Specifically, one of the two first positioning protrusions 93a has a shape that is the inverse of the other in the application direction X (the left-right direction in FIG. 14(b)). A portion of the first positioning protrusion 93a is disposed adjacent to the partition wall section 73 and is integral with the partition wall section 73. The other first positioning protrusion 93b is a protrusion having a substantially rectangular parallelepiped shape. These three first positioning protrusions 93 are all protrusions that extend in the front-rear direction (see FIG. 13, etc.), and extend rearward from the rear surface of the standing wall portion 75. At this time, the front end portions of the three first positioning protrusions 93 are located at the same position (substantially the same position) in the front-rear direction. The rear end portions of the three first positioning protrusions 93 are also located at the same position (substantially the same position) in the front-rear direction.

[0066] 14(b), the second rear accommodating section 72 is provided with a second positioning protrusion 94. The second positioning protrusion 94 is formed at a position adjacent to and rear of the standing wall portion 75. The second communication hole portion 80 is a hole that extends through the standing wall portion 75 and the second positioning protrusion 94.

[0067] Specifically, the second positioning projection 94 is a projection portion in which a partition wall side portion 94a, a connecting portion 94b, and an outer wall side portion 94c are integrally formed. The partition wall side portion 94a is formed integrally with the partition wall portion 73 at a position adjacent to the partition wall portion 73. The partition wall side portion 94a is also a continuous annular portion in a plan view seen from the rear (rear view). In other words, the partition wall side portion 94a surrounds the rear portion of the second communication hole portion 80. The connecting portion 94b is a portion having a substantially rectangular parallelepiped shape, and serves as a portion connecting the partition wall side portion 94a and the outer wall side portion 94c. The outer wall side portion 94c is a portion of the inner surface of the second rear accommodating portion 72 that extends while gently curving along the portion on the opposite side of the partition wall portion 73 (the opposite side across from the second rear accommodating portion 72).

[0068] The second positioning protrusion 94 is also a protrusion that extends in the front-rear direction (see FIG. 13(a) and the like), and extends rearward from the rear surface of the standing wall portion 75. As shown in FIG. 11 and the like, the rear end portion of the second positioning protrusion 94 is located rearward of the rear end portion of the first positioning protrusion 93 described above.

[0069] As shown in Figures 10, 11, etc., the first notch 66 and the second notch 67 are both notch-shaped portions formed on the rear side of the leading plug member 5. More specifically, they are formed near the rear end of the side surface portion of the leading plug member 5 and extend forward from the rear end. In other words, the first notch 66 and the second notch 67 are notch portions formed by removing part of the side surface portion. The first notch 66 and the second notch 67 are provided on the side surface of the tip plug member 5 at positions on opposite sides (opposite sides) of the partition wall 73.

[0070] The first notch 66 and the second notch 67 are both continuous with the rear opening 61 (first rear opening 61a, second rear opening 61b). That is, the rear end portion of the first notch 66, the rear end portion of the second notch 67, and the rear opening 61 are all formed on the rear end surface of the tip plug member 5 and are positioned on the same plane. The first notch 66 and the first rear opening 61a are connected, and the second notch 67 and the second rear opening 61b are connected. In this embodiment, the length of the first notch 66 in the front-rear direction is slightly longer than the length of the second notch 67 in the front-rear direction. In other words, in this embodiment, the lengths of the first notch 66 and the second notch 67 are approximately the same.

[0071] Here, the first notch 66 and the second notch 67 are notch portions with different opening shapes, although detailed illustrations are omitted. That is, as shown in FIG. 10 , both the first notch 66 and the second notch 67 are notch portions that are approximately rectangular in shape in a plan view with the line of sight in the orthogonal direction (the up-down direction in FIG. 10 ). Meanwhile, the corners on the front end side of the first notch 66 are more rounded than the corners on the front end side of the second notch 67 (detailed illustrations are omitted). In this way, by partially differently shaping the first notch 66 and the second notch 67, they can be easily distinguished when viewed from the outside.

[0072] As shown in FIG. 10(a) and other figures, the tip stopper member 5 is provided with two flow path forming portions 98 (one of which is not shown in FIG. 10(a) ; see FIG. 14 and other figures). The flow path forming portion 98 forms an air flow path that connects the inside and outside of the applicator 1. More specifically, as shown in FIG. 11 , a flow path forming recess 98a formed on the inner circumferential surface of the front housing portion 70, a flow path forming hole 98b formed in the upright wall portion 75, and a space behind the flow path forming hole 98b are continuous in the front-to-rear direction to form the flow path forming portion 98. Note that the "space behind the flow path forming hole 98b" here refers to a space adjacent to the first positioning protrusion 93 and surrounded on three sides by the first positioning protrusion 93. As shown in FIG. 14(a) and other figures, the flow path forming hole 98b is a hole formed integrally with the first communication hole 79 at a position adjacent to it, and penetrates the upright wall portion 75 in the thickness direction, similar to the first communication hole 79.

[0073] 14(b), the partition wall 73 of this embodiment is provided at a position away from the center (position indicated by reference symbol P in the figure) of the rear portion of the internal space 62 (hereinafter also referred to as the partitioned space). In other words, the partition wall 73 is disposed at a position shifted from the center of the space it partitions (the partitioned space). The partitioned space is then divided into two spaces (a first rear storage section 71 and a second rear storage section 72).

[0074] Here, the "partitioned space" is composed of the first rear accommodation section 71, the second rear accommodation section 72, and the area therebetween (the area where the partition wall section 73 is arranged). The partitioned space in this embodiment is a space that has a substantially circular cross section and extends in the front-to-rear direction, and is the area surrounded by the dotted line indicated by the symbol S in Figure 14(b). Therefore, the "center of the partitioned space" in this embodiment is also the part where the midpoint of the diameter is located in the cross section of each part of the partitioned space.

[0075] In other words, the "center of the partitioned space" is the position through which the center of the cross-sectional shape of each part of the partitioned space passes. Therefore, it is the center of the application direction X (the left-right direction in FIG. 14(b)) and also the center of the orthogonal direction (the up-down direction in FIG. 14(b)). The orthogonal direction is also the direction in which the first pen tip member 16 and the second pen tip member 17 are aligned. This "center of the partitioned space" can also be said to be the position farthest from the outer periphery of the partitioned space or its vicinity. Furthermore, in this embodiment, the "center of the partitioned space" is also the portion located on the central axis of the applicator 1 (cylinder body 2) (the portion through which the central axis passes). In other words, in the tip stopper member 5 of this embodiment, when the portion on the central axis of the applicator 1 (cylinder body 2) is taken as the central position, the partition wall portion 73 is formed at a position away from the central position of the applicator 1 (cylinder body 2). In other words, the partition wall portion 73 is formed so that the entire portion does not overlap with the central axis of the applicator 1 (cylinder body 2).

[0076] From the above, the first rear accommodating section 71 and the second rear accommodating section 72 have the same maximum length Lα in the application direction X, but different maximum lengths Lβ and Lγ in the orthogonal direction. The maximum length Lβ of the first rear accommodating section 71 in the orthogonal direction is longer than the maximum length Lγ of the second rear accommodating section 72 in the same direction. More specifically, the length Lβ is at least half the maximum length LΔ in the orthogonal direction of the partitioned space, and in this embodiment, is approximately 55.5 percent of the length LΔ. On the other hand, the length Lγ is less than half the length LΔ, and is approximately 40 percent of the length LΔ.

[0077] Therefore, the cross-sectional area of ​​each part of the first rear accommodating section 71 is larger than the cross-sectional area of ​​the second rear accommodating section 72 at the same position (the same position in the front-rear direction). The volume of the first rear accommodating section 71 is larger than the volume of the second rear accommodating section 72. The cross-sectional shape (shape when viewed from behind) of the first rear accommodating section 71 and the second rear accommodating section 72 is generally dome-shaped, with the partition wall section 73 side being flattened. That is, the length of the first rear accommodating section 71 and the second rear accommodating section 72 in the orthogonal direction (the up-down direction in FIG. 14(b)) is longest at the center in the application direction X (the left-right direction in FIG. 14(b)). Then, up to the vicinity of the end in the application direction X, the length in the orthogonal direction becomes shorter toward the end in the same direction.

[0078] 9, the first ink occlusion body 6 has a substantially cylindrical outer shell member 6a and a filler 6b (a fiber bundle and coating liquid impregnation means). The filler 6b is packed inside the outer shell member 6a, and the filled filler 6b is impregnated with ink. Similarly, the second ink occlusion body 7 has an outer casing member 7a and an inner batting 7b. The inner batting 7b packed inside the outer casing member 7a is impregnated with ink. Although not particularly limited, outer shell members 6a and 7a are resin tubular bodies formed from an appropriate material such as PP (polypropylene), and are members that have a roughly cylindrical outer shape before assembly. Furthermore, filling members 6b and 7b are fiber bundles with continuous pores that can be impregnated with ink. Filling members 6b and 7b are made of appropriate fibers, and may be synthetic fibers such as polyester fibers, plant fibers such as cotton and pulp, or animal fibers such as wool and raw silk.

[0079] In this embodiment, different inks are impregnated into the first ink occlusion body 6 and the second ink occlusion body 7. That is, the first ink (coating liquid) impregnated into the first ink occlusion body 6 and the second ink (coating liquid) impregnated into the second ink occlusion body 7 differ in at least one of hue, saturation, and brightness. 2 etc., the overall length (total length) of the first ink occlusion body 6 is shorter than the overall length (total length) of the second ink occlusion body 7. The thickness of the first ink occlusion body 6 in its natural state (a state in which no external force is applied, a state before assembly) is greater than the thickness of the second ink occlusion body 7 in its natural state. More specifically, the first ink occlusion body 6 and the second ink occlusion body 7 are both members whose cross sections in their natural state are generally circular. The radial length (diameter) of the cross section of the first ink occlusion body 6 in its natural state is longer than the radial length of the cross section of the second ink occlusion body 7 in its natural state.

[0080] The second pen tip unit 4 has a pen tip member 100 (opposite-side application body unit) as shown in Fig. 2. Unlike the first pen tip unit 3 on the opposite side, this second pen tip unit 4 is not intended for drawing multiple lines (double lines) in a single stroke. The pen tip member 100 is a rod-shaped plastic tip. That is, the pen tip member 100 is a member that can absorb ink by capillary action and move it toward the pen tip side (rear side). In this embodiment, the front end portion (base end portion) of the pen tip member 100 is inserted into the second ink occlusion body 7 from the rear side. That is, the second ink occlusion body 7 is a member that supplies ink to the two pen tip members.

[0081] Next, the structure of the applicator 1 of this embodiment will be described. In the applicator 1 of this embodiment, as shown in Figure 9, etc., the rear portions of the first pen tip member 16 and the second pen tip member 17 and the front portions of the first ink occlusion body 6 and the second ink occlusion body 7 are held by the tip stopper member 5.

[0082] That is, when assembling the applicator 1, the first ink occlusion body 6 and the second ink occlusion body 7 are inserted through the first rear opening 61a and the second rear opening 61b of the tip plug member 5 (see FIG. 11), respectively. In this embodiment, as described above, it is possible to easily identify whether the first notch 66 and the second notch 67 (see FIG. 10 and other figures) are connected to the first rear accommodating section 71 or the second rear accommodating section 72. This allows the worker performing the assembly work to easily identify whether the first rear opening 61a and the second rear opening 61b are connected to the first rear accommodating section 71 or the second rear accommodating section 72, making the assembly work easier.

[0083] At this time, when the inserted first ink occluder 6 is moved forward (relatively toward the second support protrusion 65), the front end portion (the leading end portion in the insertion direction) of the first ink occluder 6 comes into contact with the first positioning protrusion 93 from the rear side, as shown in Figure 9. Similarly, when the inserted second ink occluder 7 is moved forward, the front end portion (the leading end portion in the insertion direction) of the second ink occluder 7 comes into contact with the second positioning protrusion 94 from the rear side. As a result, the first ink occluder 6 and the second ink occluder 7 are disposed in appropriate positions within the tip plug member 5.

[0084] When a part (front portion) of the first ink occlusion body 6 and a part (front portion) of the second ink occlusion body 7 are accommodated in the first rear accommodation section 71 and the second rear accommodation section 72, respectively, they are in a compressed state (a state deformed from their natural shape), as shown in Fig. 15. That is, the front portion of the first ink occlusion body 6 and the front portion of the second ink occlusion body 7 are in a deformed state inside the first rear accommodation section 71 and the second rear accommodation section 72.

[0085] That is, as described above, the first ink occlusion body 6 is a member (not shown) whose cross section in its natural state is circular (approximately circular). The radial length of the cross section of the first ink occlusion body 6 in its natural state (a cross section before deformation, not shown) is longer than the maximum length Lβ (see FIG. 15) of the first rear accommodation section 71 in the orthogonal direction. When the first ink occluder 6 is accommodated in the first rear accommodation section 71 as described above, the operator presses the first ink occluder 6 against the partition wall 73, causing the first ink occluder 6 to become deformed. This allows the first ink occluder 6 to be moved forward. The tip plug member 5 of this embodiment is provided with a first notch 66 (see FIG. 10 , etc.), which makes it easy for the operator to press the first ink occluder 6. When the first ink occluder 6 is moved forward and the front portion of the first ink occluder 6 is accommodated in the first rear accommodation section 71, the first ink occluder 6 becomes sandwiched between the partition wall 73 and the inner wall portion on the opposite side thereof (a part of the wall portion forming the inner circumferential surface of the first rear accommodation section 71). This allows the front portion of the first ink occluder 6 to be accommodated in the first rear accommodation section 71 while remaining deformed. In detail, the front portion of the first ink absorbing body 6 is stored in a deformed state so that the cross section is elliptical (approximately elliptical), as shown in Figure 15, in other words, in a deformed state as if it had been slightly crushed.

[0086] 15, the length of the cross section after deformation in the orthogonal direction (the length in the vertical direction in FIG. 15, the length of the minor axis of the ellipse) is approximately the same as the length Lβ. As a result, the first ink occlusion body 6 is in strong contact with parts of the inner circumferential surfaces of the first rear accommodation section 71 (one side is a part of the main surface of the partition wall section 73) that are spaced apart in the orthogonal direction (the vertical direction in FIG. 15). This makes it possible to prevent unintended displacement of the first ink occlusion body 6.

[0087] In addition, the first ink occlusion body 6 in this embodiment has different cross-sectional shapes for the front portion housed in the tip plug member 5, the middle portion located behind it, and the rear portion located closer to the second pen tip portion 4 (see Figure 2, etc.). Specifically, the front portion of the first ink occlusion body 6 has a generally elliptical cross section as described above, while the majority of the middle portion (mid-section) has a generally circular cross section. The rear portion is pressed by the second ink occlusion body 7, which extends while curving from the radially outer side of the main body tube 2 toward the center, and one side (the second ink occlusion body 7 side) is deformed in a squashed manner. In other words, the first ink occlusion body 6 has portions with different cross-sectional shapes at various longitudinal positions.

[0088] The second ink occlusion body 7 also has a circular (approximately circular) cross-sectional shape in its natural state (not shown), and is accommodated in a slightly deformed state as if it were slightly crushed, as shown in Fig. 15. The radial length of the cross-section of this second ink occlusion body 7 in its natural state is longer than the maximum length Lγ of the second rear accommodation section 72 in the orthogonal direction. As in the case of the first ink occlusion body 6 described above, when the second ink occlusion body 7 is accommodated in the second rear accommodation section 72, the operator presses the second ink occlusion body 7 against the partition wall section 73, which causes the second ink occlusion body 7 to deform and move forward. The tip plug member 5 of this embodiment is provided with a second notch section 67 (see FIG. 10 , etc.), which makes it easier for the operator to press the second ink occlusion body 7. When the second ink occlusion body 7 is accommodated in the second rear accommodation section 72, the second ink occlusion body 7 is sandwiched between the partition wall section 73 and the inner wall section on the opposite side thereof, and remains deformed. At this time, the cross-sectional shape of the second ink occlusion body 7 after deformation is elliptical (approximately elliptical), and its length in the perpendicular direction (the length in the vertical direction in Figure 15, the length of the short axis of the ellipse) is approximately the same as the above-mentioned Lγ. The second ink occlusion body 7 also abuts firmly against parts of the inner circumferential surfaces of the second rear accommodation section 72 (one side is a part of the main surface of the partition wall section 73) that are spaced apart in the orthogonal direction (the up-down direction in FIG. 15). This makes it possible to prevent the second ink occlusion body 7 from being unintentionally displaced.

[0089] In addition, the second ink occlusion body 7 of this embodiment also has different cross-sectional shapes between the front portion housed in the tip plug member 5 and the portion located behind it (see FIG. 2, etc.). That is, the front portion of the second ink occlusion body 7 has a substantially elliptical cross-sectional shape as described above, while the majority of the rear portion has a substantially circular cross-sectional shape. Therefore, the second ink occlusion body 7 also has portions with different cross-sectional shapes at different positions in the longitudinal direction.

[0090] When comparing the cross section of the front portion of the first ink occluder 6 before and after deformation, it is found that about 20% of the entire cross section is deformed (the deformation rate is about 20%). In contrast, when comparing the cross section of the front portion of the second ink occluder 7 before and after deformation, it is found that about 17% of the entire cross section is deformed (the deformation rate is about 17%). In other words, the first ink occlusion body 6 is accommodated in the tip plug member 5 in a state in which it is deformed more than the second ink occlusion body 7 (in a state in which the deformation rate is higher).

[0091] In this embodiment, the structure in which the front part of the ink absorbing body is deformed and housed (held) in the tip plug member 5 makes it possible to use a relatively thick ink absorbing body without making the entire applicator 1 or its pen tip portion thicker than necessary. As described above, the tip stopper member 5 of this embodiment accommodates the first ink occlusion body 6 and the second ink occlusion body 7, which have different thicknesses in their natural states, by deforming them. In this case, the tip stopper member 5 of this embodiment has the partition wall portion 73 formed at a position offset from the center of the compartmented space, so that each ink occlusion body can be accommodated in an appropriately deformed state. In other words, each ink occlusion body can be accommodated without being deformed too much, and without being deformed too little.

[0092] Here, if the ink occlusion body is deformed too much, the padding will be compressed too much, making it impossible to stably supply ink to the applicator part. In this embodiment, by setting the deformation rate of each ink occlusion body within a preferred range, the ink occlusion body is firmly held so as not to shift position, and stable ink supply to the applicator part is possible. The deformation rate of each ink occlusion body can be changed by forming the partition wall portion 73 at a position farther from the center of the partitioned space or at a position closer to the center of the partitioned space. That is, the position at which the partition wall portion 73 is provided is not limited to the position in this embodiment, and it may be at a position farther from the center of the partitioned space or at a position closer to the center of the partitioned space. In this way, it is possible to change (adjust) the deformation rate of each ink occlusion body by changing the position at which the partition wall portion 73 is provided.

[0093] In addition, after the first pen tip member 16 and the second pen tip member 17 are temporarily attached to the tip stopper member 5, they are pressed in with a jig not shown, whereby the first pen tip member 16 and the second pen tip member 17 are attached to the tip stopper member 5, and the tip stopper member 5 is attached to the main body tube 2.

[0094] 9, the rear portion of the intermediate section 23 of the first pen tip member 16 is located within the front housing section 70, and a part of the rear thin shaft section 24 is inserted into the first communicating hole section 79. Then, the rear portion is inserted into the first ink occlusion body 6 from the front side within the first rear housing section 71. In other words, the side surface and rear end face of the rear portion of the rear thin shaft section 24 of the first pen tip member 16 are in contact with the padding 6b.

[0095] 16, inside the front housing portion 70, the side portion of the second pen tip member 17 is in close contact with the groove bottom portion of the housing groove portion 35 of the first pen tip member 16. In addition, multiple points of the middle curved surface portion 23a are in contact with support ribs 90 formed on the front housing portion 70. This prevents the first pen tip member 16 from shifting in a direction intersecting with the front-rear direction.

[0096] 9, in this embodiment, the inner surface portion 131 of the first support protrusion 64 faces, with a small gap between it, a portion of the side curved surface portion 30 and a portion of the middle curved surface portion 23a of the first pen tip member 16. In other words, the curved surface portion formed on the inside of the first support protrusion 64 faces, with a small gap between them, a curved surface portion on the outer circumferential surface of the first pen tip member 16. Here, the curvature of the inner surface portion 131 and the curvature of the curved surface portion facing the inner surface portion 131 (a portion of the side curved surface portion 30 and a portion of the middle curved surface portion 23a) are the same or approximately the same. For this reason, when a force toward the first support protrusion 64 is applied to the first pen tip member 16 during writing, etc., the first support protrusion 64 comes into contact with the first pen tip member 16. In other words, a part of the first pen tip member 16 fits almost exactly into the groove-shaped portion on the inside of the first support protrusion 64, and the curved surface portion of the first pen tip member 16 and the curved surface portion of the first support protrusion 64 come into surface contact. This makes it possible to prevent the first pen tip member 16 from shifting position or being damaged. In this embodiment, the inner surface portion 131, a part of the side curved surface portion 30, and a part of the middle curved surface portion 23a are configured to face each other with a gap in the natural state. However, it is also possible to form them so that they are in surface contact in the natural state.

[0097] Here, as described above, the first support protrusion 64 extends in the circumferential direction of the applicator 1 in a plan view seen from the front side. More specifically, as shown in FIG. 16 , in a plan view seen from the nib side (front side) of the first nib portion 3, a point that is the center of the main body cylinder 2 (applicator 1) is designated as point Pα. Point Pα is the portion where the central axis of the main body cylinder 2 is located (the portion through which the central axis passes). In the same plan view, a point located at one end of the arc-shaped first support protrusion 64 in the extension direction is designated as point PA, and a point located at the other end is designated as point PB. The first support protrusion 64 is formed so that the angle θA formed by the imaginary line connecting point Pα and point PA and the imaginary line connecting point Pα and point PB is 60 degrees or greater. That is, the first support protrusion 64 is formed so as to extend over a range of 60 degrees or more in the circumferential direction surrounding the first support protrusion 64. In other words, the first support protrusion 64 extends over a range of one-sixth or more of the portion surrounding the periphery (four sides) of the first support protrusion 64 (a range of one-sixth or more of the entire circumference). Note that, although not particularly limited, in this embodiment, the first support protrusion 64 is formed so that this angle θA is 86 degrees.

[0098] For the above reasons, the first support protrusion portion 64 is formed to surround from the outside the portion from one side of the first pen tip member 16 in the application direction X, through the side portion opposite the side on which the storage groove portion 35 is formed, to the other side in the application direction X. By forming the first support protrusion 64 in this manner, even if force is applied to the first pen tip member 16 from various directions when writing, the first pen tip member 16 remains in contact with the first support protrusion 64 as described above. This makes it possible to prevent the first pen tip member 16 from shifting position or being damaged.

[0099] Furthermore, by storing the first pen tip member 16 in this manner, the first pen tip member 16 is disposed at a position away from the flow path forming portion 98, and the pen tip members (first pen tip member 16, second pen tip member 17) are not located inside the flow path forming portion 98. As a result, an air flow path is formed that runs from the tip of the applicator 1 through the front housing portion 70 and the first rear housing portion 71 (see Figure 9, etc.) to the internal space of the main body cylinder 2.

[0100] Furthermore, in this embodiment, as described above, the first support protrusion 64 and the second support protrusion 65 are formed at positions spaced apart in one direction (the perpendicular direction) perpendicular to the front-rear direction. Then, as shown in Fig. 16, the first pen tip member 16 and the second pen tip member 17 are located between the first support protrusion 64 and the second support protrusion 65. The side surface of the first pen tip member 16 and the inner surface of the second support protrusion 65 that is adjacent to the tip stopper groove 87 are in surface contact with each other.

[0101] Therefore, even if a force toward the second support protrusion 65 is applied to the first pen tip member 16 during writing, the second support protrusion 65 is in contact with the first pen tip member 16, and the first pen tip member 16 is supported by the second support protrusion 65. This makes it possible to prevent the first pen tip member 16 from shifting position or being damaged. In this embodiment, a part of the side surface of the first pen tip member 16 and a part of the inner surface of the second support protrusion 65 are in surface contact in the natural state, but it is also possible to configure them to be spaced apart and facing each other. In other words, it is also possible to form them so that they come into surface contact when a force toward the second support protrusion 65 is applied to the first pen tip member 16.

[0102] 17 and 18, the applicator 1 has a tip-side notched portion 99 at a position between the first support protrusion 64 and the second support protrusion 65 in the circumferential direction of the applicator 1. These tip-side notched portions 99 are formed one at a time at positions spaced apart in the application direction X (one of the notched portions is not shown in FIGS. 17 and 18). The tip-side notched portion 99 is forward of the front housing portion 70 (forward of the front-end opening of the front housing portion 70), a portion located outside the side surface of the first pen tip member 16, and is a void portion where no member is disposed. As a result, as described above, the applicator 1 of this embodiment can prevent the first pen tip member 16 from shifting or being damaged, and can ensure the visibility of the first pen tip member 16. In other words, the applicator 1 has a structure that makes it easy to see the area around the first pen tip member 16 during use.

[0103] As shown in Figure 16, part of the second pen tip member 17 is located inside the housing groove 35 of the first pen tip member 16, and another part is located inside the tip stopper groove 87. Of the part located inside the housing groove 35, part of the side surface is in contact with the groove bottom of the housing groove 35. Of the part located inside the tip stopper groove 87, one part of the side surface and another part are in contact with different support protrusions 88. In other words, three points of the side surface of the second pen tip member 17, spaced apart in the circumferential direction, are in contact with the groove bottom of the housing groove 35, the tip end of one support protrusion 88, and the tip end of the other support protrusion 88, respectively. In addition, a gap is formed between the inner part of the tip stopper side groove portion 87 where the support protrusion portion 88 is not formed (the part that becomes the groove bottom or groove wall) and the side of the second pen tip member 17. In other words, by arranging the storage groove 35 and the tip stopper groove 87 facing each other, a space extending in the front-to-rear direction is formed, as shown in Figures 9 and 16. The majority of the second pen tip member 17 is disposed in this space.

[0104] 9 and 17, the front end portion of the second pen tip member 17 protrudes forward beyond the second support protrusion 65 (tip stopper groove 87). That is, as shown in Figure 9 etc., part of the front portion (tip stopper thin shaft portion 53c) of the second pen tip member 17 is accommodated on one side inside the accommodation groove 35, and the opposite side is not accommodated in the tip stopper groove 87. The rear portion is then surrounded on almost all sides by the accommodation groove 35 and the tip stopper groove 87. Thus, in this embodiment, at least a portion of the second pen tip member 17 is disposed inside the storage groove 35. The portion of the second pen tip member 17 that is stored inside the storage groove 35 includes a portion that is partially covered on one side by the storage groove 35 and is open on the other side, and a portion that is held from both sides by both the storage groove 35 and the tip stopper groove 87.

[0105] 9 and other figures, the tip side portion 53 of the second pen tip member 17 is accommodated in the accommodation groove tip side portion 35a of the accommodation groove portion 35. The thick shaft portion 54 of the second pen tip member 17 is accommodated in the accommodation groove base side portion 35b of the accommodation groove portion 35. The storage groove inner step portion 37 of the storage groove portion 35 and the first step portion 57 of the second pen tip member 17 engage (contact) with each other, and the second step portion 58 and the tip stopper side step portion 89 of the tip stopper member 5 engage (contact) with each other. For these reasons, the applicator 1 of this embodiment has a structure that makes it difficult for the second pen tip member 17 to become misaligned.

[0106] 18, the second pen tip member 17 of this embodiment is formed so that the distance LE from the front end portion of the second pen tip member 17 to the tip surface portion 28 of the first pen tip member 16 is 0.5 mm or more and 1.0 mm or less, and is set to 0.71 mm in this embodiment. The front end portion of the second pen tip member 17 is also the part located most forward in the center portion of the second pen tip member 17 (the portion through which the central axis passes). As described above, the second pen tip member 17 has a thin front portion, which shortens the distance LE. On the other hand, the thick shaft portion 54 is provided at a position continuous with the tip side portion 53, which allows the second pen tip member 17 to exhibit high strength.

[0107] In this embodiment, as shown in Fig. 18 etc., the front end portion of the second pen tip member 17 is located slightly rearward of the rear end side of the tip surface portion 28 of the first pen tip member 16 in a natural state. As shown in Fig. 16, in a plan view seen from the pen tip side (front side) of the first pen tip member 3, the tip surface portion 28 and the second pen tip member 17 are aligned in an orthogonal direction (up and down direction in Fig. 16). At this time, the entire tip surface portion 28 is disposed at a position spaced apart to one side (upper side in Fig. 16) from the second pen tip member 17 in the orthogonal direction.

[0108] 9, the front portion of the base end side portion 55 of the second pen tip member 17 is inserted into the second communicating hole portion 80, and the rear portion thereof is inserted from the front side into the second ink occlusion body 7 within the second rear accommodation portion 72. In other words, the rear portion (base end side insertion portion 55b) of the second pen tip member 17 is in a state where the side surface and rear end surface are in contact with the batting 7b.

[0109] 9 and other figures, the front portion (front end) of the first ink occlusion body 6 and the front portion (front end) of the second ink occlusion body 7 are located on either side of the partition wall 73. In other words, they are housed in separate spaces (first rear storage section 71, second rear storage section 72) partitioned by the partition wall 73.

[0110] At this time, the front end of the first ink occlusion body 6 becomes the connecting part between the first pen tip member 16 and the first ink occlusion body 6. In addition, the front end of the second ink occlusion body 7 becomes the connecting part between the second pen tip member 17 and the second ink occlusion body 7. The connecting portion here refers to the portion where the front end of the inserting portion of the applicator body (the front end of the batting to be inserted) is located when the applicator body (pen tip member) is inserted into the ink absorbing body. In this way, due to the structure in which the partition wall portion 73 is arranged (interposed) between the connecting portion on the first pen tip member 16 side and the connecting portion on the second pen tip member 17 side, unintentional mixing of the first ink and the second ink can be prevented.

[0111] Furthermore, as described above, the applicator 1 of this embodiment is capable of drawing double lines (multiple lines) in one stroke with the first pen tip portion 3 and drawing lines with the second pen tip portion 4.

[0112] When using the first pen tip portion 3 to draw the desired double line on the object A to be coated, such as a piece of paper, each of the first pen tip member 16 and the second pen tip member 17 is brought into contact with the object A to be coated (multiple contact state), as shown in Fig. 19. That is, with the tip surface portion 28 facing the object A to be coated, the first pen tip portion 3 is brought closer to the object A to be coated, and the tip portion (pen tip side portion) of the first pen tip portion 3 is brought into contact with the object A to be coated. This puts the applicator 1 into a multiple contact state.

[0113] Then, with both the first pen tip member 16 and the second pen tip member 17 in contact with the object to be coated A, the applicator 1 (main body tube 2) is moved horizontally (slid) in the direction of advancement of the application direction X, as shown in Figure 20, to draw the desired double line. 21, the desired double line is formed by a first line 210, which is a line formed by applying ink from the first pen tip member 16, and a second line 211, which is a line formed by applying ink from the second pen tip member 17. Specifically, in this double line, the first line 210 is a wide line that is thicker than the second line 211, and the second line 211 is a narrow line that is thinner than the first line 210.

[0114] Here, by changing the writing angle when using the applicator 1 of this embodiment, it is possible to draw both a double line in which a gap is formed between the first line 210 and the second line 211 (see FIG. 20(a)), and a double line in which no gap is formed between them (see FIG. 20(b)). Furthermore, when drawing a double line with a gap between the first line 210 and the second line 211, the size of the gap can be changed by changing the writing angle. This will be explained in detail below.

[0115] That is, in the above-described multiple contact state (see FIG. 19), as shown in FIG. 22, the angle between the central axis of the applicator 1 (an imaginary line extending in the longitudinal direction of the applicator 1) and the surface of the object to be applied A is a predetermined angle θB in a plan view seen from the side of the lateral curved surface portion 30. This angle is also the angle between the central axis of the applicator 1 and an imaginary line extending in the application direction X. This predetermined angle θB is the writing angle. That is, the writing angle can be changed by varying the predetermined angle θB. For example, by setting the predetermined angle θB to 90 degrees, the writing angle becomes 90 degrees, and by setting the predetermined angle θB to 45 degrees, the writing angle becomes 45 degrees.

[0116] Therefore, when the applicator 1 is tilted from a position where the predetermined angle θB is 90 degrees toward the direction of travel of the application direction X (see FIG. 20), the predetermined angle θB becomes smaller. This causes the writing angle to become smaller. The maximum writing angle is 90 degrees.

[0117] In the applicator 1 of this embodiment, by setting the predetermined angle θB to 90 degrees, it becomes possible to draw a double line with a gap between the first line 210a and the second line 211a in one stroke, as shown in Figure 21(a). On the other hand, by setting the predetermined angle θB to 45 degrees, it becomes possible to draw a double line with no gap between the first line 210b and the second line 211b in one stroke, as shown in FIG. 21(b).

[0118] In other words, when the specified angle θB (writing angle) is reduced and the applicator 1 is placed in a more reclined position, the area of ​​the portion of the first pen tip member 16 that comes into contact with the object A to be applied increases, as shown in Figure 21. Here, in the applicator 1 of this embodiment, a part of the first pen tip member 16 (a part on the tip side that comes into contact with the object A to be applied) is slightly deformed during use due to the writing pressure. In other words, by pressing the applicator 1 toward the object A to be applied, a part of the first pen tip member 16 is temporarily slightly deformed as if it were crushed and expanded. For this reason, when the area of ​​the portion of first pen tip member 16 that comes into contact with application target A increases, the area of ​​the portion that temporarily deforms as described above, i.e., the portion that temporarily deforms when applicator 1 is pressed, also increases. As a result, a portion of first pen tip member 16 deforms so as to spread further toward second pen tip member 17. From the above, by decreasing the predetermined angle θB, the line width of first line 210 changes, making it possible to draw different double lines. It should be noted that, as the applicator 1 is placed in a more reclined position, the portion of the second pen tip member 17 (tip contact portion 53a) that comes into contact with the object A to be coated also changes. However, the second pen tip member 17 is structured such that, while an ink outlet (slit) is formed around the tip of the tip contact portion 53a, no ink outlet is formed on the side. For this reason, even if the applicator 1 is placed in a more reclined position and a state is transitioned to where part of the tip portion and the side portion of the tip contact portion 53a come into contact with the object A to be coated, the line width of the second line 211 does not change (does not change significantly).

[0119] More specifically, when the predetermined angle θB is greater than a certain angle (50 degrees in this embodiment), as the applicator 1 is placed in a more reclined position and the predetermined angle θB is made smaller, the gap formed between the first line 210a and the second line 211a becomes smaller. Although not particularly limited, in this embodiment, when the predetermined angle θB is 90 degrees, the width of the gap formed between the first line 210a and the second line 211a is 0.41 mm, when the predetermined angle θB is 70 degrees, the width of this gap is 0.32 mm, when the predetermined angle θB is 60 degrees, the width of this gap is 0.23 mm, when the predetermined angle θB is 55 degrees, the width of this gap is 0.14 mm, and so on. When the predetermined angle θB is equal to or smaller than a certain angle, the drawn double line is a double line with no gap between the first line 210b and the second line 211b. In other words, the applicator 1 of this embodiment is capable of drawing double lines with a gap between the first line 210 and the second line 211, as well as double lines with no gap, and when drawing double lines with a gap, it is possible to draw multiple types of double lines with different gap widths.

[0120] In the above embodiment, the first ink impregnated in the first ink occlusion body 6 and the second ink impregnated in the second ink occlusion body 7 are different inks, but the present invention is not limited to this. For example, it is also possible to use the same ink for the first ink and the second ink.

[0121] The applicator 1 of the above-described embodiment is capable of drawing a desired double line in one stroke using the first nib portion 3, which is one of the two nib portions. However, the desired line (multiple line) formed by the applicator of the present invention is not limited to a double line, and may be composed of two or more lines, such as a triple line or a quadruple line. For example, it is conceivable to turn a multiple line into a triple line, a quadruple line, or the like by forming one or more grooves on the nib side of the first nib member 16.

[0122] The applicator 1 of the above-described embodiment has the above-described tip stopper member 5. That is, the applicator 1 has a barrel and an applicator body portion, and applies an application liquid by bringing the applicator body portion into contact with an object to be applied, at least one of the applicator body portions is formed to include a first applicator body portion and a second applicator body portion arranged side by side, and has a first application liquid occlusion body that occludes the application liquid to be applied by the first applicator body portion, a second application liquid occlusion body that occludes the application liquid to be applied by the second applicator body portion, and a tip stopper member, and the tip stopper member has a partition wall portion that partitions at least a portion of the internal space, and the partition wall portion partitions a partitioned space that is a portion of the internal space into a first storage portion that accommodates at least a portion of the first application liquid occlusion body and a second storage portion that accommodates at least a portion of the second application liquid occlusion body, and the partition wall portion is formed at a position away from the center of the partitioned space. [Explanation of symbols]

[0123] 1 applicator 2 Main body cylinder (shaft cylinder) 3 First pen tip part (applicator part) 4 Second pen tip part (applicator part) 5. Tip cap member 16 First pen tip member (first application body part) 17 Second pen tip member (second application body part) 23a Intermediate curved surface section (first application body side curved section) 28 Tip surface section (tip side curved surface section) 30 Lateral curved surface portion (first application body side curved portion) 35 Receiving groove 37 Stepped portion inside the accommodation groove (stepped portion on the groove side) 53c Tip side thin shaft part (thin shaft part) 54 Thick shaft part 55 base end side portion (base end side shaft portion) 57 First step part 58 Second step part 64 First support protrusion (first protrusion) 65 Second support protrusion (second protrusion) 70 Front storage compartment 89 Tip stopper side step (step part) 131 Inner side part (first protrusion side curved part) A. Coating object

Claims

1. An applicator having an applicator body portion, which applies an application liquid by bringing the applicator body portion into contact with an object to be applied, At least one of the application bodies is formed to include a first application body and a second application body arranged side by side, the second application body has a thin shaft portion and a thick shaft portion that is thicker than the thin shaft portion, the thin shaft portion is a tip end portion of the second application body and is formed at a position adjacent to the tip end side of the thick shaft portion, the first application body and the second application body are brought into contact with the object to be applied in a multiple contact state, and are slid in an application direction which is one of horizontal directions while maintaining the multiple contact state, thereby forming multiple lines; the multiple lines include a first line formed by applying the coating liquid by the first applicator body and a second line formed by applying the coating liquid by the second applicator body, the first line being thicker than the second line; the second application body has a first step portion which is a step formed at a boundary between the thin shaft portion and the thick shaft portion, the first application body has a receiving groove formed therein capable of receiving at least a portion of the second application body; The accommodation groove portion has a groove-side step portion which is a step formed inside thereof, An applicator characterized in that, inside the accommodating groove, the groove-side step portion and the first step portion are arranged in this order from the tip side of the second applicator body portion.

2. The applicator according to claim 1 , wherein the first step portion and the groove-side step portion are in contact with each other.

3. the second application body has a base-end shaft portion, the base-end shaft portion is formed at a position adjacent to the thick shaft portion, and the thick shaft portion and the base-end shaft portion are arranged in this order from the distal end side, the second application body has a second step portion which is a step formed at a boundary between the thick shaft portion and the base-end shaft portion, a tip member in which a portion of the first applying body and a portion of the second applying body are accommodated, 3. The applicator according to claim 2, wherein the second step portion contacts a step portion formed on the tip plug member.

4. A tip plug member is provided. the tip stopper member has a tip-side housing portion in which a part of the first applying body portion and a part of the second applying body portion are housed, and the tip-side portion of the first applying body portion and the tip-side portion of the second applying body portion are both located on the tip side of the tip-side housing portion, the tip plug member has a first protrusion and a second protrusion located distally of the tip-side housing portion, the first protrusion and the second protrusion are both portions that protrude toward a tip end side, 4. The applicator according to claim 1, wherein the first protrusion is located to the side of a tip end portion of the first applicator body, and the second protrusion is located to the side of a tip end portion of the second applicator body.

5. The applicator according to any one of claims 1 to 4, characterized in that by changing the writing angle in the multiple contact state, it is possible to switch between a state in which a double line having a gap between the first line and the second line can be written, and a state in which a double line without a gap between the first line and the second line can be written.

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