JPH09123675A - Knock type writing instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the unintentional immersing of the writing part of a refill in a barrel during writing. SOLUTION: The knock type writing instrument comprises a constitution that, when a knock-out member 2 is advanced by the knocking operation of the knock type writing instrument, the writing part 51 of the end of a refill 5 protrudes from the end opening 11 of a barrel 1, and a locking protrusion 22 formed at the member is engaged with the locking hole 13 formed at the barrel to make it possible to write. In this case, when a slide button 4 having a protrusion 41 is mounted at a clip 3 and the button is slit in the axial direction of the clip, the protrusion of the slit collides with the locking protrusion to disengage the engagement of the locking protrusion with the locking hole, and the writing part of the refill is immersed in the barrel.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a knock-type writing instrument which allows a writing portion at the tip of a feel to project from a tip opening of a barrel for writing by a knocking operation.

[0002]

2. Description of the Related Art Knock-type writing instruments having various structures have been put into practical use. However, a refill, such as a ballpoint pen refill, is arranged in a barrel in a state of being repulsed toward the tail end by a knock spring. When the knock member that receives the tail end is projected from the tail end opening of the barrel and the knock member is advanced by the knocking operation, the writing portion at the tip of the feel projects from the tip opening of the barrel and is formed integrally with the knock member. Further, the locking projection at the tip of the elastic portion is engaged with the locking hole formed in the shaft cylinder to receive the writing pressure so that the writing is enabled and widely used.

In order to immerse the writing portion of the refill in the barrel after finishing writing, the engagement between the locking protrusion of the knock member and the locking hole of the barrel may be released by some method. It is known that this release is performed by a release button attached to a clip. In other words, when the release button is attached to the clip movably in the radial direction of the barrel, and the release button protruding from the clip is pressed with your fingertips to move it in the radial direction of the barrel, the tip of the release button locks the barrel. Since the elastic portion is deformed by colliding with the locking projection engaged with the hole, the engagement between the locking projection of the knock member and the locking hole of the shaft cylinder is released, and the writing portion of the refill is locked inside the shaft cylinder. Immerse yourself in.

[0004]

As described above, with the release button attached to the clip so as to be movable in the radial direction of the shaft cylinder, the refill writing section can be easily immersed, but on the other hand, during writing, etc. In some cases, the release button may be inadvertently pressed, and the writing portion of the refill may be immersed in the barrel during writing. Also, the clip is an important part of the writing instrument in terms of design, but the release button has only the stroke necessary to release the engagement between the locking projection of the knock member and the locking hole of the shaft cylinder from the surface of the clip. Since it needs to be projected, it is not so preferable in terms of design.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a knock-type writing instrument which is preferable in terms of design without causing the writing portion of the refill to inadvertently enter into the barrel during writing.

[0006]

In order to achieve the above object, the present invention is a knock member in which a refill is elastically disposed in the direction of the tail end by a knock spring in a barrel and receives the tail end of the refill. Is projected from the tail end opening of the barrel, and when the knock member is moved forward by the knocking operation, the writing part at the tip of the refill projects from the tip opening of the barrel,
In a knock-type writing instrument in which a locking projection at the tip of an elastic portion formed integrally with a knock member engages with a locking hole formed in a barrel to enable writing, a slide button having a protrusion is attached to a clip. , When the slide button is slid in the axial direction of the clip, the projection of the slide button abuts the locking projection, releasing the engagement between the locking projection and the locking hole, and the writing part of the refill is placed inside the barrel. Be immersive.

When the slide button is slid in the axial direction of the clip, the projection of the slide button collides with the locking projection and the locking projection is disengaged from the locking hole, so that the writing portion of the refill has the shaft cylinder. Since it is immersive inside or it is a slide operation, the slide button is rarely inadvertently slid during writing, and the writing part of the refill does not inadvertently immerse into the barrel during writing. . Further, the slide button does not need to be projected so much from the surface of the clip that it is preferable in terms of design.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the embodiments shown in the drawings. In FIG. 1, a shaft cylinder 1 integrally molded with a clip 3 from a synthetic resin is a cylinder body having a front end opening 11 and a tail end opening 12. Then, on the side surface of the shaft tube 1 below the clip 3, the locking hole 13 and the elongated hole 1 for stopper are formed.
4 are drilled. In addition, a refill 5 of a ballpoint pen is arranged in the barrel 1 in a state of being repulsed by a knock spring 6 toward the tail end side.

The tail end of the refill 5 is received by a fitting portion 24 at the tip of the knock member 2. The tail end of the knock member 2 is
Although protruding from the tail end opening 12 of the shaft cylinder 1, the knock member 2 is integrally formed with a slightly curved rod-shaped elastic portion 21, and a locking projection 22 is formed at the tip of the elastic portion 21. A stopper protrusion 23 is formed on the tail end side of the elastic portion 21. Then, the elastic portion 21 is elastically bulged outward by the spring 25, but when the elastic portion 21 is rich in elasticity, the spring 25 is not always necessary.

A slide button 4 is provided in the long hole of the clip 3,
It is fitted so as to be slidable in the axial direction of the clip 3. Although the protrusion 41 is formed on the slide button 4,
As shown in FIG. 3, a slit 42 is formed in the protrusion 41 so that it can be easily elastically deformed. By utilizing this elastic deformation, the protrusion 41 is fitted into the elongated hole of the clip 3,
The step portion 43 on the side surface of the protrusion 41 is locked to the back surface of the clip 3 so that the slide button 4 does not fall out. The slide button 4 is elastically urged to the tail end side by a small spring 44.

When the writing portion 51 at the tip of the refill 5 is immersed in the barrel 1, as shown in FIG.
2 and the stopper protrusion 23 are located in the long hole 14,
The stopper projection 23 abuts on the tail end edge of the elongated hole 14 so that the knock member 2 does not come off. When the tail end of the knock member 2 is pressed and knocked from this state, as shown in FIG. 2, the writing portion 51 at the tip of the refill 5 projects from the tip opening 11 of the barrel 1 and the locking projection 22 locks. Hole 1
It is possible to write because it locks at 3 and receives writing pressure.

In order to immerse the writing portion 51 at the tip of the refill 5 into the barrel 1 after writing, the slide button 4 may be slid in the direction indicated by the arrow against the elastic force of the spring 44. . As a result, the protrusion 41 of the slide button 4
Collides with the locking projection 22 and pushes it down, so that the elastic portion 21
Is elastically deformed, and the engagement between the locking projection 22 and the locking hole 13 is released. Therefore, the knock member 2 retracts and the refill 5 moves.
The writing portion 51 at the tip is retracted into the barrel 1, the stopper projection 23 comes into contact with the tail end edge of the elongated hole 14, and returns to the state shown in FIG.

FIG. 4 shows another embodiment, but in this embodiment, the clip 3 is integrally attached to the tip opening 11 side of the barrel 1 unlike a normal writing instrument. And
A locking hole 13 and a through hole 15 are formed on the side surface of the shaft cylinder 1 on the back side of the clip 3, and a long hole 1 for a stopper is provided on the opposite side of the locking hole 13.
4 are drilled. A slide button 4 having the same structure as that described in the previous embodiment is slidably attached to the clip 3.

A knock member 2 for receiving the tail end of the refill 5.
The locking projection 22 is formed at the tip of the elastic portion 21, but the stopper projection 23 is formed at the tip of the other elastic portion. When the writing portion 51 at the tip of the refill 5 is retracted into the barrel 1, the locking projection 22 is located in the through hole 15 and the stopper projection 23, as shown in FIG.
Is located in the elongated hole 14, and the stopper projection 23 abuts on the tail end edge of the elongated hole 14 to prevent the knock member 2 from coming off. When the tail end of the knock member 2 is pressed and knocked from this state, as shown in FIG. 5, the writing portion 51 at the tip of the refill 5 projects from the tip opening 11 of the barrel 1 and the locking projection 22 locks. Writing is possible because it is locked in the hole 13 and receives writing pressure.

In order to immerse the writing portion 51 at the tip of the refill 5 into the barrel 1 after writing, the slide button 4 may be slid in the direction indicated by the arrow, as in the previous embodiment. As a result, the projection 41 of the slide button 4 abuts against the locking projection 22 and pushes it down, so that the elastic portion 21 elastically deforms and the engagement between the locking projection 22 and the locking hole 13 is released.
Therefore, the knock member 2 retracts, the writing part 51 at the tip of the refill 5 is recessed in the barrel 1, the stopper projection 23 abuts on the tail end edge of the elongated hole 14, and the locking projection 22 enters the through hole 15. Position and return to the state shown in FIG.

[0016]

As described above, in the knock-type writing instrument of the present invention, the writing portion at the tip of the refill is sunk into the barrel by sliding the slide button attached to the clip, but it is not possible during writing. The slide button is rarely slid in preparation, and the writing portion at the tip of the refill is not inadvertently inserted into the barrel during writing. Further, the slide button may be protruded by a height such that it can be slid with a fingertip, which is preferable in terms of design.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a state in which a writing unit according to a first embodiment of the present invention is immersed.

FIG. 2 is a cross-sectional view of the writing unit according to the first embodiment of the present invention in a protruding state.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a cross-sectional view of a second embodiment of the present invention in a state where a writing part is depressed.

FIG. 5 is a cross-sectional view of a writing portion of a second embodiment of the present invention in a protruding state. [Brief Description of Drawings] 1 Shaft cylinder 11 Tip opening of shaft cylinder 12 Tail end opening of shaft cylinder 13 Locking hole 2 Knock member 21 Elastic part 22 Locking projection 23 Stopper projection 3 Clip 4 Slide button 41 Projection 5 Refill 51 Refill writing part 6 Knock spring

Claims (1)

[Claims] 1. A refill is elastically disposed in the barrel in a tail end direction by a knock spring, and a knock member for receiving the tail end of the refill protrudes from a tail end opening of the barrel, and the knock member is operated by knocking operation. When it is moved forward, the writing portion at the tip of the refill protrudes from the tip opening of the barrel, and the locking projection at the tip of the elastic portion integrally formed with the knock member engages with the locking hole formed in the barrel. In a knock-type writing instrument that can be written with, a slide button having a protrusion is attached to a clip, and the slide button is slid in the axial direction of the clip,
A knock-type writing instrument characterized in that the projection abuts the locking projection to release the engagement between the locking projection and the locking hole, and the writing section of the refill is retracted into the barrel.