JPH08258480A - Capless writing tool - Google Patents

Abstract

PURPOSE: To eliminate bothersome work to attach/detach a cap at every writing and eliminate worry of losing the cap by a writing tool wherein a lid expands by interlocking proceeding of a writing body which shuts an opening at a tip of an axial barrel and a writing tip protrudes from between forked belts. CONSTITUTION: To a tip hole of a barrel 1, a connecting member 2, having a front barrel 3 with an opening 3a arranged in a front part and a back barrel 4 to be fixed to the tip hole of the barrel 1 arranged at a back part, is fixed. To one side of the front barrel 3, a curved lid 5 for opening/closing at the opening 3a is connected by a hinge 11. To other end of the lid 5, a tip of a forked and flexible belt 6 is connected by a hinge 12 and other end of the belt 6 is connected to a receiving barrel 7. In using, when a writing body 14 is moved ahead, the receive barrel 7 moves ahead by interlocking the writing body, and the lid 5 is pushed up with supporting point at the hinge 11 by the belt 6, so that a writing tip 18 is protruded so as to be ready to write.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a capless writing instrument equipped with a volatile ink such as a marker or a felt-tip pen.

[0002]

2. Description of the Related Art Conventionally, a writing instrument equipped with a volatile ink such as a marker or a felt-tip pen is provided with a cap for sealing a pen tip. Therefore, there are problems such as the trouble of attaching and detaching the cap and the loss of the cap. Many capless writing instruments have been known to solve such problems, but few have surely overcome the sealing property. In addition, there is a case of sealing with an opening / closing lid as in the present application, but there is a problem that the structure is complicated and cannot be provided at low cost.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a capless writing instrument which has a reliable seal and is inexpensive.

[0004]

DISCLOSURE OF THE INVENTION A capless writing instrument of the present invention devised to achieve the above object has one end on one side of a fixed coupling member having a rear shaft portion fixed to the front of a shaft cylinder. A lid that is connected by a hinge or the like to open and close the opening at the front end of the front shaft of the coupling member, and a flexibility that extends in a bifurcated shape with one end joined to the other end of the lid by a hinge or the like. And a receiving member connected to the other end of the belt portion are integrally formed, and a return spring is urged between the rear shaft portion and the receiving cylinder portion so that the opening portion serves as a lid portion. The pen point of the writing body that is closed and accommodated in the shaft cylinder is sealed, and the lid portion is expanded in conjunction with the writing cylinder when the writing body advances in conjunction with the receiving cylinder portion. Writing is possible by protruding from between the belt parts.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to a capless writing instrument such as a marker and a felt-tip pen that accompanies evaporation of ink, and FIG. 1 and FIG. First, the coupling member 2 is fixed to the tip hole of the barrel 1. The fixing method is performed by press fitting or providing a locking portion between them. In addition, the connecting member 2 has an opening 3
A front shaft portion 3 having a and a rear shaft portion 4 fixed to a front end hole of the shaft cylinder 1 are formed on the rear side, and one end of the front shaft portion 3 is connected by a hinge portion 11 to open and close the opening portion 3a. A bendable lid portion 5, a flexible belt portion 6 having one end joined to the other end of the lid portion 5 by a hinge portion 12 and extending in a bifurcated shape (not shown), and a belt Receiving tube portion 7 connected to the other end of portion 6
Are integrally formed.

The connecting member 2 suppresses the evaporation of ink and is made of synthetic resin having excellent hinge characteristics. An inner cylindrical portion 9 is formed inside the rear shaft portion 4, and a receiving seat 10 that bulges in a circular shape is formed on the inner peripheral surface near the rear end. Further, the inner hole communicates with the opening 3a. A cylindrical seal member 13 made of an elastic material such as rubber is provided in the front end hole of the front shaft portion 3.
Is fixed, and the inner surface of the lid portion 5 comes into close contact with the open end when the end surface of the seal member 13 appropriately projects from the end surface of the front shaft portion 3 and the lid portion 5 closes the opening portion 3a. or,
Although the end surfaces of the front shaft portion 3 and the seal member 13 are inclined, they may be at right angles. If it is formed in a slanted shape, there is an effect that it does not largely project in the outer peripheral direction when the lid 5 is expanded. In particular,
It is necessary when the mouth is provided on the tip and the lid is installed inside the mouth. A guide groove 2a for guiding the belt portion 6 is provided on one side of the front shaft portion 3 and the rear shaft portion 4 where the bifurcated belt portion 6 is located. A collar 8 is formed at the rear end of the receiving cylinder 7. The collar portion 8 is a portion where a rear end of a return spring 17, which will be described later, abuts, and a split portion is formed at an appropriate portion so that the collar portion 17 can be reduced in diameter for the convenience of mounting the return spring 17. (Not shown)

On the other hand, the cursive body 14 is a cursive body such as a marker or a felt-tip pen, in which a circumferential projection 16 is formed at a predetermined position of the tip shaft portion 15, and a pen nib 18 projects and is fixed to the tip. . Further, a collar portion 14a is formed at a required position on the outer peripheral surface of the rear ink containing portion. The writing material may be an ink storage material, a direct liquid ink tank, or the like.

A return spring 17 is urged between the rear end of the rear shaft portion 4 of the coupling member 2 and the flange portion 8 of the receiving cylinder portion 7 to fix the coupling member 2 to the tip of the shaft cylinder 1. Cursive 1
4 is mounted in a state in which the collar portion 14a is in contact with the rear end of the receiving tubular portion 7, and the projection 16 of the shaft portion 15 is closely locked to the receiving seat 10 of the inner tubular portion 9. The small chamber between the end face of the opening closed by the lid 5 and the receiving seat 10 of the inner eastern part 9 is tightly mounted. Further, although the receiving tube portion 7 moves forward and backward in conjunction with the forward movement of the writing body 14, various means are required for the forward and backward positioning of the writing body 14. The means for doing so is not the gist of the present application, and therefore illustration and description thereof will be omitted.

[0009]

The capless writing instrument of the present invention is constructed as described above. When not in use, the lid 5 closes the opening 3a so that the pen nib 18 is closely packed in a small chamber as shown in FIG.
As shown in FIG. 2, when the cursive body 14 is moved forward, the receiving tube portion 7 is moved forward in conjunction with it, and the forward movement of the belt portion 6 pushes the lid portion 5 upward with the hinge portion 11 as a fulcrum, thereby forming a bifurcated belt portion. 6 is located in front of the opening 3a, and is inserted between the two forks so that the pen tip 18 is in a protruding state, and the writing body 14 is prevented from retracting to be in a writing state.

[0010]

The structure and operation of the capless writing instrument of the present invention are as described above, and there is no need to attach and detach the cap every time writing, as in the case where the pen tip is covered with the conventional detachable cap. There is no need to worry about losing the cap, and there is no problem of accidentally getting your hands dirty when attaching or removing the cap. Also, since the structure is simple, it can be provided at low cost.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of an essential part showing an embodiment of the present invention, showing a state in which a pen tip is sealed with a lid.

FIG. 2 is a vertical cross-sectional view of a main part showing an embodiment of the present invention, showing a state in which a lid part is opened and a pen tip is projected.

[Explanation of symbols]

 1 shaft cylinder 2 coupling member 2a guide groove 3 front shaft part 3a opening 4 rear shaft part 5 lid part 6 belt part 7 receiving cylinder part 8 collar part 9 inner cylinder part 10 receiving seat 11 hinge part 12 hinge part 13 seal member 14 Cursive body 14a Collar portion 15 Shaft portion 16 Projection portion 17 Return spring 18 Pen tip

Claims (2)

[Claims] 1. A lid portion that shields an opening at the tip of the barrel, and when the writing body accommodated in the barrel advances, the lid opens and the pen tip projects, and the writing body retracts. In a capless writing instrument in which the lid part is sometimes closed and the pen tip is in a closed state, one end is connected to one side of a connecting member having a rear shaft portion fixed to the front end of the barrel by connecting a hinge or the like to the front of the connecting member. A lid portion that can open and close the opening at the tip of the shaft portion, a flexible belt portion that extends in a bifurcated shape by joining one end to the other end of the lid portion with a hinge or the like, and the other end of the belt portion. The receiving cylinders connected to each other are integrally formed, a return spring is urged between the rear shaft portion and the receiving cylinder, and the opening is closed by the lid.
The pen tip of the writing body housed in the shaft cylinder is sealed, and the lid portion expands in cooperation with the writing cylinder when the writing body advances in conjunction with the receiving cylinder portion. A capless writing instrument characterized in that it is configured to protrude from between. 2. In the coupling member, an inner cylinder portion communicating with the opening is integrally formed inside the rear shaft portion, and a circular shape is formed on the inner peripheral surface near the rear end opening of the inner cylinder portion. An opening in which the pen tip is closed by the lid when a bulging receiving seat is formed, and a protrusion is formed on the outer peripheral surface of the tip of the writing body in a circular shape so that the pen tips are in close contact with each other. The capless writing instrument according to claim 1, wherein the writing instrument is closely packed in a small chamber formed between the writing instrument and the portion.