JP2002234291A - Core cotton type writing utensil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a core cotton type writing utensil, in which the sealabilities of a tip shaft and of a barrel are contrived to be improved by a simple structure, the tip shaft can be surely installed onto the barrel and easily removed and ink can be easily supplied without staining environment. SOLUTION: In the core cotton type writing utensil, in which the barrel 2 of a housing part 4 housed with an ink-impregnated core cotton 3 is formed, the opening part of the housing part 4 is formed on one end side of the barrel 2, the tip shaft 5 provided with a thicker side pen wick 7 is threadingly installed to a thicker side end part 20 and a thicker side cap 10 for covering and detachably fitting the thicker side pen wick 7 of the tip shaft 5 and some part of the barrel 2, a plurality of recessed engaging parts 5f are formed on a pen point side front surface part 5c of the tip shaft 5. By means of a supplementary core cotton container 31 as a jig member having projected engaging parts 39 engaging with the recessed engaging parts 5f of the tip shaft 5, the screwing-in or screwing-out of the threading between the tip shaft 5 and the barrel 2 is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a batting-type writing implement, and more particularly to a batting-style writing implement that refills batting with ink.

[0002]

2. Description of the Related Art Conventionally, as a writing implement, a batting-type writing implement in which a batting impregnated with ink for storing ink is accommodated in a shaft cylinder is often used. In such batting-type writing implements, it is already known to use a screw fitting as a method of fixing a front shaft to a shaft cylinder in order to seal a batting. In addition, in recent years, so-called double-headed writing implements, which have pen tips at both ends of one writing implement and use one for bold writing and the other for thin writing, are often used.
Even in such a double-headed writing instrument, a method of fixing the front shaft to the barrel by screw fitting has been conventionally performed.

[0003] In such batting-type writing implements, there has been known one in which when the ink is consumed, the ink is replenished and the writing implement body is reused continuously. In particular, as a method of replenishing ink in a double-headed writing instrument, Japanese Utility Model
As disclosed in JP-A-86988, there has been proposed a system in which a front shaft is pulled out from a barrel and ink is supplied to a batting accommodated in the barrel.

[0004]

However, according to the conventional method as described above, there is a problem that when the ink is put into the batting, the ink may be scattered and the surrounding area may be stained. Further, when removing the front shaft from the shaft cylinder, there is a problem in the operation of replenishing the ink, such as crushing the front end of the front shaft with a finger or requiring a large force to pull out the front shaft.

As a countermeasure against the above problem, it is conceivable to weaken the fitting force between the front shaft and the barrel in order to make it easier to remove the front shaft. In this case, the sealing performance between the front shaft and the barrel is reduced. This causes a problem that the ink easily leaks. Therefore,
In order to improve the sealing performance between the front shaft and the barrel, there is a demand for a writing instrument that allows the front shaft to be easily removed from the barrel even if a large amount of tightness is applied to the seal portion and the fitting is strengthened.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and aims at improving the sealing performance between the front shaft and the shaft cylinder with a simple structure, so that the front shaft and the shaft cylinder can be securely mounted. It is another object of the present invention to provide a batting-type writing instrument that can be easily removed and can be easily refilled with ink without polluting the surroundings.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a batting-type writing instrument, in which a housing portion for housing a batting impregnated with ink is formed inside a barrel, and the housing portion is provided at one end of the barrel. A batting provided with an opening, a tip shaft provided with a pen core screwed into the opening, and a cap that covers a part of the pen core and the barrel of the tip shaft and is removably fitted. In the writing instrument, the tip shaft has a plurality of concave or convex engaging portions formed on a pen tip side front surface portion, and includes a convex or concave engaging portion engaged with the engaging portion of the tip shaft. The jig member may be used to tighten or loosen the screw between the front shaft and the opening.

In a state where the cap is mounted on the tip shaft side of the writing instrument, a part of an outer peripheral part of a shaft cylinder disposed inside the cap and a part of an inner peripheral part of the cap are brought into close contact with each other, and It is preferable to seal the inner pen core side.
Further, the jig member uses a batting container having a main body and a lid portion for storing the batting for replenishment. The jig member is connected to one end of the main body or the lid portion by an engaging portion of the front shaft. It is preferable to provide a concave or convex engaging portion to be fitted and to form an opening or a concave portion into which a pen core can be inserted. Further, the front shaft forms a threaded portion on the outer periphery of the mounting portion with the opening on the barrel side, and the barrel forms a threaded portion corresponding to the mounting portion on the inner periphery of the opening. Is preferred.

According to the present invention, the following effects can be obtained. That is, in the batting-type writing instrument, a plurality of concave or convex engaging portions are formed on the front end portion of the pen shaft on the pen tip side, and the jig member is used to tighten the screw between the front shaft and the opening. Alternatively, since the loosening operation is performed, the front shaft can be easily attached and detached without crushing the tip of the front shaft. In addition, there is no need to work the tip directly by hand, so there is no contamination.

Further, when a cap is attached to the tip shaft side of the writing instrument, a part of an outer peripheral part of a shaft cylinder disposed inside the cap and a part of an inner peripheral part of the cap come into close contact with each other, and Since the inside pen core side was sealed,
Even if the cap rotates, the front shaft and the cap are not in contact with each other, so the screwed state between the front shaft and the barrel does not loosen,
Ink leakage can be prevented.

[0011] Further, as the jig member, a batting container accommodating a batting for replenishment is utilized, and one end of a main body or a lid portion of the batting container is engaged with the engaging portion of the front shaft. By providing the concave or convex engaging portion to be provided, it is possible to reliably prepare when replacing the batting without specially providing a jig member. In addition, since the opening or recessed portion into which the pen core can be inserted is formed in the jig member, the tip shaft can be attached and detached without damaging the pen tip.

Further, a screw portion is formed on the outer periphery of the mounting portion of the tip shaft, and a screw portion corresponding to the mounting portion is formed on the inner peripheral portion of the opening of the shaft cylinder, so that the shaft has a simple configuration. Since the tip shaft can be mounted with the cylinder on the outside, the sealing of the pen tip portion by the cap can be ensured.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 5 show an example of an embodiment of the present invention. In the drawings, portions denoted by the same reference numerals as those in the drawings represent the same components. FIG. 1 is a partial cross-sectional view showing the entire configuration of a double-headed batting-type writing instrument according to an embodiment of the present invention. FIG. 2 is a detailed partial cross-section showing the configuration near the thick end of a shaft cylinder of the batting-type writing instrument. FIG. 3, FIG. 3 is a detailed partial cross-sectional view showing the configuration near the narrow end of the barrel of the batting-type writing implement, FIG. 4 is a schematic exploded view showing the configuration of the batting-type writing implement,
FIG. 5 is a schematic exploded view showing the configuration of the refilling batting container according to the present embodiment, and FIG. 6 is an explanatory view showing the attachment / detachment operation of the barrel and the front shaft of the batting-type writing instrument.

In this embodiment, as shown in FIG. 1, a double-headed batting-type writing implement having a pen tip at both ends and a housing portion 4 in which a batting 3 impregnated with ink is housed inside a barrel 2. It is one. The barrel 2 has a substantially tapered outer shape.
A tip shaft 5 is attached to one thick end 2a, and a tipler 6 is attached to the other thin end 2b. A thick pen core 7 is mounted on the tip shaft 5, and a thin pen core 8 is mounted on the tipler 6. The thick pen core 7 and the thin pen core 8 are respectively fitted to both ends of the batting 3, and the ink of the batting 3 penetrates the pen cores 7 and 8 at both ends to allow writing on either pen core. It has become.

As shown in FIG. 2, a thick cap 10 is removably mounted on the thick end 2a so as to cover the thick outer peripheral portion 2c and the pen core side. A screw portion 2d is formed on the inner peripheral portion on the opening side of the thick end portion 2a, while a screw portion 5a is formed on the outer periphery of the front shaft 5, and the screw portions 2d and 5a are screwed. The tip shaft 5 is attached to the thick end portion 2a by combining.
The tip shaft 5 has a shaft-side fitting portion 5 fitted to the thick end portion 2a.
A sealing material 14 is provided near the front end of the thick end 2a of b to seal the fitting portion between the front shaft 5 and the thick end 2a.

As shown in FIGS. 2 and 4, the tip shaft 5 has a pen tip mounting portion 5d having a thick pen tip 7 provided substantially at the center on a pen tip front face portion 5c. And is formed in a substantially conical shape toward the rear from the base of the pen core mounting portion 5d, and four concentric concave portions 5f are formed on the conical front portion 5e in the circumferential direction so as to be substantially equally spaced. Have been. The concave engaging portion 5f has a substantially rectangular cross section.

The thick cap 10 is provided at a position close to the pen tip on the inner wall where the tip of the pen core 7 is stored.
The projection b is formed so as to seal the pen core 7 inside the thick side cap 10 by fitting with the outer periphery of the pen core mounting portion 5d.

The opening end 10a of the thick cap 10
A click portion 10c is formed to protrude inward along the circumference on the inner side. The click portion 10c is crimped to the outer peripheral portion 2g on the click side of the thick end portion 2a facing the click portion 10c to hold the thick cap 10. Reference numeral 10d in the drawing is a clip.

The narrow end 2b is formed as shown in FIG.
It is formed in a substantially cylindrical shape, and a thin side cap 11 is detachably attached so as to cover the outer peripheral portion 2h on the distal end side and the pen core side. The sealing structure by the narrow side cap 11 is configured such that the outer peripheral portion 2h on the distal end side of the narrow side end 2b and the narrow side cap 11
Seal 1 by fitting with narrow inner peripheral portion 11a inside
3, the pen core 8 side inside the cap is sealed.

The opening side end 11b of the narrow side cap 11
A click portion 11c is formed to protrude along the circumference on the inner side of the shift. The click portion 11c is crimped to the narrow outer peripheral portion 2i of the narrow end portion 2b facing the click portion 11c to hold the narrow cap 11.
A substantially cylindrical cutler 6 is fitted inside the narrow end 2 b, and a thin pen core 8 is provided inside the cutler 6. The cutler 6 is press-fitted and fixed to the barrel 2.

Here, FIGS. 1 and 4 show a schematic structure of the batting-type writing implement 1 main body. The batting type writing implement 1 in the figure is in a state where the thick side cap 10 and the thin side cap 11 are removed, and the batting 3 is replaced by removing the front shaft 5 from the barrel 2 and removing the thick side end 2.
Perform from a side.

When the batting 3 is replaced, the refill batting 30
As shown in FIG. 5, it is accommodated in a cylindrical filling batting container 31. The refilling batting container 31 includes a case portion 33 having a storage portion 32 for storing the refilling batting 30.
And a lid 34.

The case portion 33 has a cylindrical shape, and has an opening portion 32a of the housing portion 32 at one end portion.
The internal space is divided into the accommodating portion 32 and the pen tip relief portion 37 by a partition wall 35 formed inside. On the case bottom portion 33b, rib-shaped convex portions serving as convex engaging portions 36 at positions facing the concave engaging portions 5f formed on the front shaft 5 are provided at four locations facing the axial direction and outward. An opening 37a of the pen tip relief portion 37 is formed in a projecting manner in a range excluding the convex engaging portion 36. That is, the case bottom portion 33b also serves as a jig for attaching and detaching the front shaft 5 to and from the shaft cylinder 2.

The housing section 32 includes a lid section 34 and a case section 3.
The space of the accommodating portion 32 formed in a state where the refilling batting 30 is attached to the housing 3 is configured to form a space capable of accommodating the refill batting 30. The pen core release portion 37 is mounted on the front shaft 5 with the convex engagement portion 36 fitted in the concave engagement portion 5f of the front shaft 5.
The pen core on the side is formed so as to be arranged without interfering with the partition 35. The lid portion 34 has a shape in which a hollow portion 34a is formed inside, the one end portion 34b side is opened, and the rear end portion 34d is closed.

Next, the attachment / detachment of the tip shaft 5 and the barrel 2 in the batting type writing implement 1 will be described with reference to FIG. FIG.
As shown in (1), the batting-type writing instrument 1 is in a state where the front shaft 5 and the barrel 2 are assembled. The tip shaft 5 and the barrel 2 are screwed together. When the tip shaft 5 is removed from the barrel 2 in this state, it is necessary to loosen the screw portion. First, the case bottom part 33b and the tip shaft 5 are opposed to each other, the thick pen core 7 side is inserted into the opening part 37a, and the convex engagement part 36 and the concave engagement part 5f of the case bottom part 33b are fitted.

At this time, since the thick pen core 7 is arranged in the pen core relief portion 37, the front shaft 5 can be mounted on the case bottom portion 33b without any interference. Then, while holding the case portion 33 and pressing the case portion 33 against the front shaft 5, the case portion 33 is rotated in a direction in which a screw portion (not shown) of the front shaft 5 is loosened (for example, a counterclockwise direction). Let it.

When the screw is loosened, the case 33 is
After that, the front shaft 5 is easily turned with a bare hand and removed from the barrel 2. Thus, the batting 3 can be taken out of the shaft cylinder 2. Take out the used batting 3 from the barrel 2,
A new filling batting 30 is put in, and the tip shaft 5 is attached, and the filling batting 30 is accommodated in the barrel 2. Used batting 3
After the operation, the refilling batting 30 is stored in the refilling batting container 31 in which the refilling batting 30 has been stored and disposed.

Then, the case bottom portion 33b is pressed against the front shaft 5 again to fit the convex engagement portion 36 and the concave engagement portion 5f of the case bottom portion 33b. Then, in a state where the case portion 33 is gripped and the case portion 33 is pressed against the front shaft 5, a screw portion of the front shaft 5 is tightened (for example, a clockwise direction).
Then, the case 33 is rotated to further tighten the front shaft 5 and the shaft cylinder 2 to ensure the screwed state. In this way,
The storage section 4 in which the refilling batting 30 is stored can be securely sealed.

According to this embodiment, the refilling batting container 31 for storing the refilling batting 30 is constructed as described above.
By using the case portion 33, a jig can be configured with a simple configuration, and the front shaft 5 and the shaft cylinder 2 can be easily and reliably attached and detached. 2 can be improved. In addition, when performing the attachment / detachment work of the tip shaft 5, since the work is carried by holding the case portion 33, the work can be reliably performed without soiling the hands. Further, since the ink is replenished by replacing the batting impregnated with the ink, it is not necessary to supply the ink directly, so that the ink can be easily replenished without polluting the surroundings.

The seal structure of the pen tip by the thick side cap 10 of the present embodiment is obtained by forming a seal portion 10b protruding at a position close to the pen tip on the inner wall portion where the tip of the pen core 7 is stored. Although the pen core 7 side inside the thick cap 10 is sealed by fitting with the outer peripheral portion of the core mounting portion 5d, the present invention is not limited to this.
For example, as another embodiment, as shown in FIG. 7, the sealing structure with the thick cap 110 is formed by sealing the thick outer peripheral portion 2 c of the thick end 2 a formed in a tapered shape, and the thick cap 110. The sealing portion 110b may be formed so as to protrude inward in the inner circumferential direction of the opening-side end portion 10a so as to seal the tip end side of the front shaft 5 inside the thick cap 110.

According to such a configuration, the thick cap 1
10 is abutted against the outer peripheral portion of the shaft cylinder 2 to seal it.
Therefore, even when the user rotates the thick cap 110 unnecessarily with respect to the shaft, there is an excellent effect that the front shaft 5 does not become slack with respect to the barrel 2.

Next, a second embodiment will be described with reference to the drawings. 8 to 11 show an example of the present embodiment, and FIG. 8 is an explanatory diagram showing the configuration of the front shaft of a batting-type writing instrument and a screw-fastening device according to a second embodiment of the present invention. 9, FIG. 9 is a view taken in the direction of arrow A in FIG. 8, FIG. 10 is a view taken in the direction of arrow BB in FIG. 8, and FIG. 11 is a plan view showing the entire configuration of the screwed-in fastening member.

In the second embodiment, as shown in FIG. 8, a batting (not shown) impregnated with ink is accommodated in a barrel 202, and a pen tip is provided at one end of the barrel 202. In the batting type writing implement 200 to which the front shaft 205 is attached, the front shaft 205 is connected to the barrel 2 when refilling ink or replacing the batting.
At the time of detachment from the device 02, it is designed to be attached and detached using the screw-in fastening member 210.

As shown in FIG. 8, the front shaft 205 has a rear end (not shown) which is screwed and inserted inside one end of the shaft tube 202, and an end portion of the shaft tube 202. And a pen-tip-side front portion 206 that is exposed from the outside to be attached. A male screw portion is formed at the rear end of the barrel, and the barrel 2
The female screw portion formed inside the inner portion 02 and the male screw portion are screwed and fastened.

The pen tip side front portion 206 has a substantially tapered tip portion 206 which is tapered toward the tip end thereof.
a is formed, and a substantially cylindrical front shaft body 206c in which a seal portion 206b is formed continuously with the front end portion 206a is formed, and the end portion is connected to the front shaft body 206c at the end thereof. A jaw 206d for abutting and positioning on the barrel 202 is formed.

A pen core 207 is attached to the tip 206a. As shown in FIG. 8, the flange portion 206d is continuously provided in the circumferential direction with a dimension larger than the outer diameter of the front shaft body portion 206c, and the front shaft 205 is screwed and fastened to the shaft cylinder 202. At this time, a stopper function is provided to abut on the end of the shaft cylinder 202 to prevent the screw portion from entering. As shown in FIG. 9, the outer periphery of the flange portion 206d is disposed at four equally spaced positions along the circumferential direction of the outer periphery (at positions at 90 ° along the circumference). Four concave engaging portions 206e are formed in a substantially rectangular shape on the inside in plan view.

Next, the structure of the screw fastening member 210 will be described. The screw fastening member 210 is shown in FIG.
As shown in FIG. 10 and FIG.
While a front shaft engaging portion 211 into which c can be inserted is formed, a grip portion 212 for gripping the other end portion is integrally formed.

The front shaft engaging portion 211 has a substantially circular through hole 21 similar to the front shaft 205 in plan view shown in FIG.
1a is formed. The inner peripheral edge of the through hole 211a corresponds to the concave engaging portion 206e formed on the flange portion 206d of the front shaft 205, and is located at four equally distributed positions along the inner peripheral direction inward in plan view. Opposite to the concave engaging portion, four convex engaging portions 211b are provided so as to be substantially similar to the concave engaging portion.

As shown in FIG. 8, the front shaft engaging portion 211 has a substantially rectangular cross section in a side view.
12, and the convex engaging portion 211b is formed at a substantially central portion in the thickness direction. A recess 21 recessed in a shape substantially similar to the outer shape of the flange 206d in a plan view is provided in a portion of the tip shaft engaging portion 211 facing the flange 206d.
1c is formed to guide and position the attachment with the flange 206d.

As shown in FIGS. 8 and 11, the gripping portion 212 has a substantially rectangular cross section, and has a tapered shape slightly tapered from a substantially central portion in the longitudinal direction toward the front shaft engaging portion 211 side. Has a hollow structure inside.

Next, the operation of the batting-type writing implement 200 and the screw fastening member 210 of the present embodiment will be described. FIG.
As shown in (1), the batting-type writing instrument 200 is in a state where the front shaft 205 and the barrel 202 are assembled. The tip shaft 205
And the shaft cylinder 202 are screwed together. When the tip shaft 205 is removed from the barrel 202 from this state, it is necessary to loosen the screw portion.

First, the front shaft 205 is inserted into the through hole 211a from the pen core 207 side, with the front shaft engaging portion 211 of the screw fastening member 210 facing the front shaft 205. The convex engaging portion 211b and the concave engaging portion 206e of the flange 206d are fitted. Then, the grip portion 212 of the screw fastening member 210 is gripped, and the grip portion 212 is gripped.
In a state in which the screw portion (not shown) of the front shaft 205 is loosened (for example, a counterclockwise direction) in a state where is pressed against the front shaft 205.
The screw fitting member 210 is rotated.

When the screw portion of the front shaft 205 is loosened, the front shaft engaging portion 211 is detached from the front shaft 205, and then the front shaft 20 is bare handed.
5 is easily rotated and removed from the barrel 202. Thus, the batting can be taken out of the shaft cylinder 202. And
The used batting is taken out of the barrel 202, a new refill is put in, the front shaft 205 is attached, and the refill is stored in the barrel 202.

Then, the front shaft 205 is inserted again into the front shaft engaging portion 211 of the screw tightening member 210, and the convex engaging portion 211b of the front shaft engaging portion 211 and the concave engaging of the flange portion 206d. The part 206e is fitted. Then, the grip portion 212 is gripped, and the front shaft engagement portion 211 is engaged with the flange portion 206d of the front shaft 205.
Screwing member 210 in the direction in which the screw portion of the front shaft 205 is tightened (for example, clockwise).
Is rotated to further tighten the front shaft 205 and the shaft cylinder 202 to ensure a screwed state. In this way, the storage section in which the refilling batting is stored can be reliably sealed.

With the above configuration, according to the second embodiment, the front shaft 205 can be
Is attached and detached, so that it can be attached and detached reliably, and the sealing performance between the front shaft 205 and the barrel 202 can be improved. In addition, when the attachment and detachment work of the front shaft 205 is performed, since the work is performed by holding the screw fastening member 210, the work can be reliably performed without soiling the hands.

Further, according to the present embodiment, since the screw fastening member 210 is formed separately, the shape of the screw fastening member is not limited to the shape described in this embodiment. Except for a portion engaged with the front shaft 205, it can be configured in any shape. Therefore, it is possible to realize a shape excellent in usability corresponding to the user.

In this embodiment, the pen tip side front portion 20 is used.
6, a concave engaging portion 206e is formed on the outer peripheral side of the flange portion 206d so that the convex engaging portion 211b enters the side portion of the flange portion 206d and engages with the side portion. However, the present invention is not limited to this. For example, as in the first embodiment, the engagement portion of the screw-in fastening member inserted from the tip end of the pen tip side front portion 206 is the pen tip side. Front part 2
The engagement portion may be configured to engage on the front surface side of 06.

Further, the configuration of the jig member of the present invention is not limited to the illustrated example described above, and it goes without saying that various changes can be made without departing from the spirit of the present invention.

[0049]

As described above, the first aspect of the present invention is as described above.
According to the batting-type writing implements described in Nos. 4 to 4, the use of the jig member allows the front shaft to be easily attached and detached without crushing the tip of the front shaft. In addition, when a force is required for attaching and detaching the tip shaft, since the operation is not performed directly with bare hands, the ink does not become dirty and the ink can be easily replenished. In addition, there is an excellent effect that the sealing property between the front shaft and the shaft cylinder is improved with a simple structure, and the filling of the batting container can be reliably ensured.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view showing the entire configuration of a double-headed batting-type writing instrument according to an embodiment of the present invention.

FIG. 2 is a detailed partial cross-sectional view showing a configuration near a thick end of a shaft cylinder of the batting-type writing instrument.

FIG. 3 is a detailed partial cross-sectional view showing a configuration near a narrow end of a shaft cylinder of the batting-type writing instrument.

FIG. 4 is a schematic exploded view showing a configuration of the batting-type writing instrument.

FIG. 5 is a schematic exploded view showing a configuration of a refilling batting container according to the embodiment.

FIG. 6 is an explanatory view showing an attaching / detaching operation of a shaft cylinder and a front shaft of the batting-type writing instrument.

FIG. 7 is a detailed partial cross-sectional view showing a configuration near a thick end of a shaft barrel of a batting-type writing instrument according to another embodiment.

FIG. 8 is an explanatory diagram showing a configuration of a front shaft and a screwing-in device of a batting-type writing instrument according to a second embodiment of the present invention.

9 is a view as viewed in the direction of the arrow A in FIG.

FIG. 10 is a sectional view taken along the line BB in FIG. 8;

FIG. 11 is a plan view showing the overall configuration of the screw fastening member.

[Explanation of symbols]

 1,200 batting-type writing implement 2,202 shaft barrel 2a thick end 2b narrow end 3 batting 4 accommodation part 5,205 tip shaft 5f concave engaging part 6 cutler 10 thick cap 11 thin cap 12,13 fit Mating seal 14 sealing material 30 refilling batting 31 refilling batting container 32 receiving part 33 case part 33b case bottom part 34 lid part 35 partition part 36 convex engaging part 206 pen tip side front part 206a flange part 206e concave engaging part 210 Screw fastening member 211 Front shaft engaging part 211a Through hole 211b Convex engaging part 212 Gripping part

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Nobuyuki Nakajima 1091 Tateishi, Fujioka-shi, Gunma Mitsubishi Pencil Co., Ltd. Gunma R & D Center F-term (reference) 2C350 GA04 HA15 HC03 KC11 KC14 KF03 KF05 NA14 NA16

Claims (4)

[Claims] 1. A housing portion in which a batting impregnated with ink is housed inside a shaft cylinder, an opening of the housing portion is formed at one end of the shaft tube, and a tip shaft provided with a pen core is provided. In a batting-type writing implement, which is screwed into the opening and covers a pen core portion of the tip shaft and a part of the barrel, and which is removably fitted therein, the tip shaft is a pen tip side front portion. A plurality of concave or convex engaging portions are formed on the front shaft and the opening by a jig member having a convex or concave engaging portion engaged with the engaging portion of the front shaft. A batting-type writing implement characterized in that a screwing or loosening operation is performed. 2. In a state where a cap is mounted on the tip shaft side of the writing instrument, a part of an outer peripheral part of a shaft cylinder disposed inside the cap and a part of an inner peripheral part of the cap are in close contact with each other, and the cap is closed. The batting-type writing implement according to claim 1, wherein an inner pen core side is sealed. 3. The jig member uses a batting container provided with a main body and a lid for storing a batting for replenishment. The jig member is engaged with one end of the main body or the lid by the front shaft. The batting-type writing implement according to claim 1 or 2, wherein a concave or convex engaging part to be engaged with the part is provided, and an opening or a concave part in which a pen core part can be inserted is formed. 4. A threaded portion is formed on an outer periphery of a mounting portion with the opening on the barrel side, and the shaft barrel has a threaded portion corresponding to the mounting portion on an inner periphery of the opening. The batting-type writing implement according to any one of claims 1 to 3, characterized in that: