JPH10329490A - Double ended type writing instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double ended writing instrument having a cap rear inserting structure without tightly engaging a large cap by a small cap, even when a structure for containing the small cap in the large cap is formed. SOLUTION: A nib 2B and a cap covering the nib 2B are respectively provided at both ends of a barrel 2. This cap has a large cap 5 and small cap 6. When the cap 5 is mounted at the cap 6 side, the cap 6 is contained to be disposed in the cap 5. And, an inner wall of the cap 5 is engaged with an outer wall of the barrel 2, and the inner wall of the cap 5 is disengaged from or brought into contact with the outer wall of the cap 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-headed writing instrument provided with a pen tip at both ends of a barrel and a cap for covering the pen tip. More specifically, the present invention relates to a cap insertion structure of the double-headed writing instrument.

[0002]

2. Description of the Related Art Conventionally, in a double-headed writing instrument, for example,
Japanese Utility Model Laid-Open Publication No. 3-57088 discloses a structure in which an opening of a pen tip side cap to be used is detachably fitted to the top of another unused pen tip side cap.

[0003]

The cap of the conventional double-headed writing instrument has the following problems because it has a structure in which the caps are fitted to each other.

If the caps are firmly fitted with each other, the two caps may be removed at the same time when the other cap, which is temporarily inserted into the top of one cap, is returned to the original pen tip side. There is an inconvenience when removing the cap.

[0005] In particular, when two caps are composed of a large cap and a small cap having different sizes, a structure in which the small cap is fitted deeply in the large cap or a structure in which the entire small cap is accommodated in the large cap is used. In the case of the structure in which the caps are fitted to each other as described in the above publication, there is a possibility that the small cap may bite into the large cap and the small cap may not be easily removed from the large cap.

The present invention has been made to solve the above-mentioned problems, and a double-headed writing implement having a cap rear insertion structure in which a small cap does not bite into a large cap even when the small cap is accommodated in a large cap. I will provide a.

[0007]

The present invention is a double-headed writing instrument 1 having a pen tip at both ends of a barrel 2 and a cap covering the pen tip, wherein the cap comprises a large cap 5 and a small cap 6. When the large cap 5 is attached to the small cap 6 in order to use the pen tip 2A of the large cap 5, the small cap 6 is housed and arranged in the large cap 5, The gist of the present invention is that the inner wall of the large cap 5 is not fitted to the outer wall of the small cap 6 while the inner wall of the small cap 6 is fitted to the outer wall of the barrel 2.

Further, in the double-headed writing instrument 1 according to claim 1, when the large cap 5 is mounted on the small cap 6 side, the inner wall of the large cap 5 is in axial contact with the outer wall of the small cap 6. (Claim 2) is preferable. A stopper 51 (for example, a step or a rib) is formed on the inner wall of the large cap 5. Further, a contact portion 61 (for example, a rib or a flange portion) is formed at a closed end (top) or an intermediate portion of the outer wall of the small cap 6.

In particular, if a structure in which the contact portion 61 is provided in the middle of the outer wall of the small cap 6 (see FIG. 2) is adopted, the stopper portion 51 can be used as the shoulder portion 3A of the barrel 2 and the small cap 6
Both of the contact portions 61 can contact the stopper portion 51 in the axial direction. This simplifies the shape and structure of the stopper 51 and facilitates manufacturing.

[0010]

[Function] The large cap 5 is a pen tip 2A on the large cap 5 side.
Is used, it is attached to the small cap 6 side. At this time, the small cap 6 is accommodated and arranged in the large cap 5, and the large cap 5 is fitted to the shaft cylinder 2 on the small cap 6 side, and at the same time, the small cap 6 is not fitted to the small cap 6. To be. Therefore, after using the pen tip 2A,
When removing the large cap 5 from the small cap 6 side to return to the original pen tip 2A side, the small cap 6 is not removed at the same time, and the cap attaching / detaching operation is smooth. In addition, the small cap 6 does not fall into the large cap 5 and it is not difficult to remove the small cap 6 from the large cap 5.

Furthermore, the structure in which the inner wall of the large cap 5 is brought into contact with the outer wall of the small cap 6 in the axial direction,
The small cap 6 is reliably prevented from being inserted deeply into the large cap 5, and an accident that prevents the small cap 6 from being taken out of the large cap 5 is prevented. In addition, when the large cap 5 and the small cap 6 abut on each other in the axial direction, the user is given a good fitting feeling (specifically, a contact sound or a response at the time of contact).

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention, a double-headed writing instrument 1, will be described below with reference to the drawings.

FIG. 1 is a longitudinal sectional view showing an embodiment of the double-headed writing instrument 1 of the present invention. FIG. 2 illustrates the operation of the present invention, and is a longitudinal sectional view of an essential part showing a state where the large cap 5 is attached to the small cap 6 side in the double-headed writing instrument 1 of FIG.

A pen tip (pen tip 2A, pen tip 2B) is provided at both ends of the barrel 2. The pen tip 2A and the pen tip 2B are different types of pen tips having different pen tip sizes, pen tip types, ink colors, and the like. The type of the pen tip is, for example, a pen body made of a resin processed body of a fiber, a pen body made of a plastic porous body, a pen body made of a plastic extrusion molding, a ballpoint pen tip, a fountain pen, a pipe pen body, a mechanical pencil, etc. , Can be mentioned.

(Overview of Cap) A large cap 5 is attached to the pen tip 2A. A small cap 6 is attached to the pen tip 2B. The large cap 5 and the small cap 6 are obtained by injection molding of a synthetic resin. Both of the caps 2A and 2B are bottomed cylinders having one end closed and the other end opened. When attached to the barrel 2, the large cap 5 is the pen tip 2A, and the small cap 6 is the pen tip 2B. Seal or protect.

(Large Cap) The large cap 5 has, on its inner wall surface, a fitting portion 52 (specifically, a point-like convex portion or a convex portion) formed of a convex portion that fits with the outer surface of the large-diameter portion 3 of the barrel 2. Annular convex part)
And a stopper 51 formed of a step-shaped abutting wall formed in the direction of the cap closing portion with respect to the fitting portion 52 and facing the direction of the opening.

When the large cap 5 is mounted on the original pen tip 2A side (see FIG. 1), the fitting portion 52 is in a fitted state with the outer peripheral surface of the large diameter portion 3 of the barrel 2 at the same time. The stopper portion 51 is in an axial contact state with the shoulder 3A of the barrel 2. When the large cap 5 is attached to the small cap 6 side to use the pen tip 2A and the small cap 6 is accommodated in the large cap 5 (see FIG. 2), the fitting portion 52 is The stopper portion 51 is in an axially abutting state with the abutting portion 61 of the small cap 6 at the same time that the stopper portion 51 is in a fitted state with the outer peripheral surface of the large diameter portion 3 of the barrel 2.

Further, as shown in FIG.
The inner diameter of the inner wall surface of the large cap 5 between the first cap 1 and the fitting portion 52 is set smaller than the inner diameter of the small cap 6 in the portion from the contact portion 61 to the opening end. Further, the inner diameter of the inner wall surface of the large cap 5 in the direction closer to the closing portion than the stopper portion 51 is set smaller than the outer diameter of the small cap 6 in the direction closer to the closing portion than the contact portion 61. Thereby, large cap 5
Is attached to the small cap 6 side, and when the small cap 6 is accommodated in the large cap 5, the large cap 5 and the small cap 6
Can be set in a non-fitting state.

(Small Cap) The small cap 6 has an abutting portion 61 on the outer wall surface that can abut the stopper portion 51 of the large cap 5 in the axial direction, and a small diameter of the shaft cylinder 2 on the inner wall surface. It is an injection-molded product of synthetic resin in which a fitting portion 62 (specifically, a point-like convex portion or an annular convex portion) formed of a convex portion that fits with the outer surface of the portion 4 is integrally formed.

When the small cap 6 is attached to the original pen tip 2B side, the fitting portion 62 is
At the same time as being fitted with the outer peripheral surface, the opening end surface is
Is in axial contact with the shoulder 3B. Also, the outer diameter of the outer wall surface of the small cap 6 in the opening end direction from the contact portion 61 on the outer wall surface is:
The diameter is slightly smaller than the outer diameter of the large diameter portion 3 of the barrel 2. Thereby, when the large cap 5 is attached to the small cap 6 side, even if the large cap 5 is fitted with the large diameter portion 3 of the barrel 2 (see FIG. 2), the large cap 5 and the small cap 6 And the non-fitting state is maintained.

(Shaft Barrel) The shaft barrel 2 is a cylindrical body obtained from metal or synthetic resin, and has a pen point 2A
B is attached. The mounting structure of the pen tip may be a type that is directly attached to the barrel 2 or a type that is attached to the barrel 2 via another member such as a pen holder, and is appropriately adopted depending on the type of the pen tip. . In this embodiment, the barrel 2 has a large-diameter nib 2A.
(Fiber resin processed body) and small-diameter pen tip 2B (synthetic resin extruded body) are attached to both ends. Further, an ink occlusion body (not shown) made of a fiber converging body is accommodated in the barrel 2 and the nibs 2A and 2A are provided at both ends thereof.
B is pierced and connected.

The barrel 2 has shoulders 3A and 3 at both ends.
B having a large diameter portion 3 (grip portion) and the shoulder portions 3A and 3B
And small-diameter portions 4A and 4B (pen tip holder portions) which are continuously provided. When the large cap 5 is attached to the pen tip 2A (see FIG. 1), the shoulder 3A of the pen tip 2A and the stopper 51 of the large cap 5 make contact in the axial direction.
The outer peripheral surface of the large diameter portion 3 on the pen tip 2A side and the fitting portion 52 of the large cap 5 are fitted in a radial direction. Also, nib 2
When the small cap 6 is attached to the side B (see FIG. 1), the shoulder 3B on the pen tip 2B side and the opening end of the small cap 6 make contact in the axial direction, and the pen tip 2B side Small diameter part 4B
The outer peripheral surface and the fitting portion 62 of the small cap 6 are fitted in the radial direction.

[0023]

According to the present invention, the double-headed writing instrument has a small cap inside the large cap when the large cap is mounted on the small cap side in order to use the pen tip on the large cap side. In order to return the large cap to the original pen tip by accommodating and disposing the large cap inner wall with the outer wall of the barrel while the large cap inner wall is not fitted with the small cap outer wall. When the small cap is removed from the small cap side, the small cap is not removed at the same time, the small cap is not eaten into the large cap, and the small cap cannot be removed from the large cap.

Further, the configuration of claim 2 (that is, the structure in which the inner wall of the large cap is brought into contact with the outer wall of the small cap in the axial direction) reliably prevents the small cap from being inserted deeply into the large cap. Prevents accidents that make it impossible to remove the small cap from the large cap. In addition, when the large cap and the small cap are brought into contact in the axial direction, the user is given a comfortable fit.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a double-headed writing instrument of the present invention.

FIG. 2 is a longitudinal sectional view of a main part of the double-headed writing instrument of FIG. 1 with a large cap attached to a small cap side.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Double-headed writing instrument 2 Shaft barrel 2A Pen tip 2B Pen tip 3 Large diameter part 3A Shoulder part (pen tip 2A side) 3B Shoulder part (pen tip 2B side) 4A Small diameter part (pen tip 2A side) 4A Small diameter part (pen tip) 2B side) 5 Large cap 51 Stopper part 52 Fitting part 6 Small cap 61 Contact part 62 Fitting part

Claims (2)

[Claims] 1. A double-headed writing instrument (1) comprising a pen tip at both ends of a barrel (2) and a cap covering the pen tip, wherein the cap comprises a large cap (5) and a small cap (6). When the large cap (5) is attached to the small cap (6) in order to use the nib (2A) of the large cap (5), the large cap (5) is inserted into the large cap (5). The small cap (6) is accommodated and arranged, the inner wall of the large cap (5) is fitted to the outer wall of the barrel (2), and the inner wall of the large cap (5) is fixed to the small cap (6).
A double-headed writing implement characterized in that it is not fitted to the outer wall. 2. When the large cap (5) is mounted on the small cap (6) side, the inner wall of the large cap (5) is brought into axial contact with the outer wall of the small cap (6). The double-headed writing instrument according to claim 1.