JP2001121870A - Installation structure of head crown or tail crown - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the installation structure of a head crown or a tail crown, an axial length of the engaging part of which is not limited and, further, and an interval from the position of a writing body or of a retraction and extension mechanism in the members of a writing utensil is necessary. SOLUTION: A projecting part is formed on the bottom surface of the head crown or of the tail crown at a position offset to the center line of a barrel. At the same time, an engaging hole engaging with the projecting part is formed at a position opposite to the projecting part at the end part of the member of the writing utensil, to which the head crown or the tail crown is installed, so as to install the head crown or the tail crown by engaging the projecting part with the engaging hole.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head or tail mounting structure in which a head or tail is mounted on an end of a writing instrument member.

[0002]

2. Description of the Related Art Writing implements in which a head crown or a tail crown is attached to an end of a writing implement member for the purpose of a decorative effect or the like are well known. Such a crown or tail crown is screwed or press-fitted to the end of the writing instrument member, or forms an engaging hole in the axial center of the end of the writing instrument member, and the engaging hole has a head. The protuberance formed on the bottom surface of the crown or tail crown was fitted and fitted.

[0003]

However, in the structure in which the head crown or the tail crown is attached to the end of the writing instrument member by screwing or press-fitting the head crown or the tail crown to the above-mentioned writing instrument, In order to securely attach the tail crown without falling off from the writing instrument, the engaging portion needs to have a certain length in the axial direction. In addition, there are often various mechanisms in the vicinity of the axis of the writing instrument member, such as a writing element, a writing element retracting mechanism, a sealing member, etc., and an engagement hole is formed in the axis of the end of the writing instrument member. However, in consideration of the positions of the writing body and the retracting mechanism, it is necessary to form an engagement hole at a certain distance from the writing body and the retracting mechanism.

[0004] In particular, a plurality of writing bodies are arranged in a barrel, and a raised portion of a slide member provided at a rear end of each writing body is projected from a notch formed in the barrel from an outer peripheral surface. By holding and advancing one of the protruding portions toward the distal end of the barrel, the engaging portion of the slide member engages with the engaged portion formed in the barrel, and the writing distal end of the writing body is pivoted. By selectively protruding from the opening at the end of the cylinder, the protrusion of the other slide member is advanced in the direction of the end of the barrel, so that the engaging part engaged with one engaged part can be moved to the other part. In a slide-type multi-core writing instrument in which the release projection is released and further advanced, the other engaging portion engages with the engaged portion and can maintain a protruding state. Must be formed near the axis, so that the slide member extends radially from the axis. As the mounting structure of the crown, the crown is screwed to the rear end of the barrel, or a holding portion having a certain length is formed at the barrel end from a retracting mechanism such as a slide member. For example, an engaging hole formed in the rear end of the shaft cylinder from the retracting mechanism such as forming an engaging hole in the holding portion requires a certain interval.

In view of the above problems, the present invention does not restrict the axial length of the engaging portion of the head crown or the tail crown, and furthermore, the position of the writing body and the retracting mechanism in the writing instrument member. An object of the present invention is to provide a head or tail crown mounting structure that does not require a space.

[0006]

According to the present invention, there is provided a writing instrument member for mounting a head crown or a tail crown on a bottom surface of a head crown or a tail crown, wherein a projection is formed at a position eccentric to an axis. An engagement hole for engaging the projection is formed at a position of the end portion facing the projection, and a head crown or a tail crown is mounted by engaging the projection with the engagement hole. .

[0007] Further, the protruding portion forms a cutout portion which can be contracted in the radial direction, and the protruding engaging portion formed on the protruding portion is formed with an engaged portion formed on an engaging hole. It is a structure to put on the head crown or tail crown by exceeding.

Further, the engaging hole is formed at a rear end of the barrel, and a plurality of writing bodies are provided in the barrel, and a protrusion of a slide member provided at the rear end of each writing body is provided. The part is held in a state protruding from the outer peripheral surface from the notch formed in the shaft cylinder,
By moving one of the raised portions toward the distal end of the barrel, the engaging part of the slide member engages with the subject part formed in the barrel, and the writing tip of the writing body is opened at the tip of the barrel. The protruding portion of the other slide member is advanced toward the distal end of the barrel so that the engaging portion that has been engaged with one engaged portion can be released by the other release projection. Release
The sliding type multi-core writing instrument is capable of maintaining the protruding state by further moving forward so that the other engaging portion engages with the engaged portion.

The writing instrument member of the present invention is a generally known member used for a writing instrument, such as a shaft tube or a cap, to which a tail crown or a head crown is attached. The head crown or tail crown may be attached to the member for use directly or via another member such as a holder member.

[0010]

Embodiments of the present invention will be described with reference to the drawings. For those showing the same members and locations,
The same reference numerals are given. The writing implement 1 shown in FIGS.
Ballpoint pen bodies 6, 7 and a mechanical pencil body 8 of two different colors are mounted on a sliding case 4 disposed at the rear end of the rear shaft 5 so as to be slidably urged rearward by a resilient member 13. It is urged rearward by elastic members 11, 12 (not shown), and housed. Each of the ballpoint pens 6 and 7 includes an ink storage cylinder 6a,
Tip members 6b and 7b holding the ball rotatably are press-fitted into the opening at the tip of 7a. The mechanical pencil body 8 has a lead pipe 8b fitted to a lead core case 8a. In addition, the ink storage cylinders 6a and 7a and the lead core case 8
a sliding members 9 and 1 serving as operating bodies
8 and 10 are press-fitted, and the raised portions 9a, 18a,
10a is an engaging window 13, 19 formed in the sliding case 4,
14 so as to protrude from the outer peripheral surface of the barrel. A clip 15 is formed integrally with the sliding case 4.

When using the mechanical pencil 8,
The protruding portion 10a is advanced in the direction of the opening 3a of the barrel end, whereby the engaging portion 9b of the sliding member 9 engages with the receiving portion 4a formed near the axis A of the sliding member 4, thereby providing a mechanical pencil body. Is maintained in a protruding state from the front end opening 3a of the front shaft 3 screwed to the front end of the rear shaft 5,
use. When another writing body, for example, a ballpoint pen body 6 is used, the projection 9b of the slide member 9 is moved forward in the direction of the opening 3a of the shaft cylinder so that the release projection 9b of the slide member 9 is engaged with the subject part 4a. Engaging part 1 of sliding member 10
0a is pushed out to release the engaging member, and the raised portion 9a is further advanced in the direction of the opening 3a of the barrel end, whereby the engaging member 9a is locked to the engaged member 4a and the tip member of the ball-point pen body 6 is formed. 6b can be used while maintaining the protruding state.

As described above, when one writing body (mechanical pencil body 8) is used and then the other writing body (ballpoint pen body 6) is used, the release projection 9c of the other slide member 9 is used. Since it is necessary to push out the engaging part 10b engaged with the engaged part 4a of the writing body 10 to release the engaging part, the retracting mechanism such as the slide members 9, 10 is disposed near the axis A. It is set up.

The crown 2 is attached to the rear end of the sliding case 4. As described above, since the sliding mechanism 4 is provided with the retracting mechanism near the axis A, the eccentric position with respect to the axis A at the rear end of the sliding case 4 and the sliding members 9, 10,.
An engagement hole 16 is formed at a position different from the position at which 18 is disposed, and a protrusion 2 b formed on the bottom surface of the crown 2 is engaged with the engagement hole 16.
The head cap 2 is mounted by engaging with. The bottom 2a of the crown 2 is made non-circular to prevent rotation, and the bottom 2a is loosely fitted to a fitting portion 4b formed at the rear end of the sliding case 4. Since it is the bottom 2a for rotation prevention,
The length in the axial direction can be set short without restriction. In the present embodiment, the bottom portion and the fitting portion are loosely fitted, but may be fitted by press-fitting or the like.

When the projection 2b formed on the bottom surface of the crown 2 is engaged with the engagement hole 16, the projection 2b is provided with a notch 2d that can be contracted. The projection 2b is reduced in diameter and is easily engaged. In addition, after the engagement portion 2c formed on the protrusion 2a passes through the engagement hole 16, the diameter of the protrusion 2a returns to its original position, so that even if a force is applied in the removal direction (the direction of arrow F in FIG. 3). Since the engaging portion 2c comes into contact with the engaged portion 17 which is the bottom surface of the sliding case 4, it does not easily fall off.

The shape of the projection 2a of the present invention is not particularly limited. Further, the engaging portion 2 formed on the protrusion 2a
The shape of c is not particularly limited. Similarly, in the present embodiment, the engaged portion 17 has the bottom surface of the engaging hole 16 of the sliding case 4 as the engaged portion 17 in the present embodiment, but is not limited thereto. Instead, a step or a projection may be formed in the engagement hole 16. That is, when the projection 2a is inserted into the engagement hole 16, the diameter of the projection is reduced by the notch 2d, and the engagement portion 2c formed on the projection 2a exceeds the engaged portion 17, and the diameter of the projection is reduced. 2a
The structure may be any as long as the engaging portion 2a comes into contact with the engaged portion 17 so that it cannot easily fall off even if a force is applied in the falling direction by returning the original diameter.

Further, the present invention relates to an embodiment
Instead of directly forming an engagement hole at the rear end of the barrel, another member such as a sliding case is disposed at the rear end of the barrel, and an engagement hole is formed in the member. Is also good. Further, the present invention is not limited to the slide-type multi-core writing implement described above, and may be any generally known writing implement as long as it is a member for a writing implement to which a head crown or a tail crown is attached.

[0017]

Since the present invention has the above-described configuration,
The length of the head or tail crown in the axial direction is not restricted, and furthermore, the mounting structure of the head or tail crown, which does not require an interval from the position of the writing body and the retracting mechanism within the writing instrument member, Can be provided.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a multi-core writing instrument according to a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing a state where a mechanical pencil in FIG. 1 is projected.

FIG. 3 is an enlarged sectional view of a main part with a part omitted in the first embodiment of the present invention.

FIG. 4 is an enlarged cross-sectional view of the cap of FIG. 1;

FIG. 5 is a sectional view taken along the line II in FIG. 3;

[Explanation of symbols]

 2 Crown 2a Bottom 2b Projection 2c Engagement 2d Notch 16 Engagement Hole A Axis

Claims (3)

[Claims] A projection is formed on a bottom surface of a head crown or a tail crown at an eccentric position with respect to an axis, and is opposed to the projection at an end of a writing instrument member to which the head crown or a tail crown is mounted. Formed at the position where the engagement hole is formed to engage the projection, the head or tail crown is mounted by engaging the projection in the engagement hole, Mounting structure. 2. The projection has a cutout portion which can be contracted in the radial direction, and the projection-shaped engagement portion formed on the projection has an engaged portion formed on an engagement hole. The head crown or tail crown mounting structure according to claim 1, wherein the head crown or the tail crown is mounted by moving over the head crown or the tail crown. 3. An engagement hole is formed at a rear end of a barrel, a plurality of writing bodies are disposed in the barrel, and a protrusion of a slide member provided at a rear end of each writing body. The part is held in a state protruding from the outer peripheral surface from the notch formed in the barrel, and one of the raised parts is advanced in the tip direction of the barrel, whereby the engaging part of the slide member is formed in the barrel. By engaging with the to-be-measured part, the writing tip of the writing body can be selected and protruded from the opening of the tip of the barrel, and the raised part of the other slide member can be advanced in the tip direction of the barrel. The other release projection releases the engaging part that has been engaged with one of the engaged parts, and the other engaging part is engaged with the engaged part to maintain the protruding state. The mounting structure for a head crown or a tail crown according to claim 1 or 2, which is a slide-type multi-core writing instrument capable of being operated.