JPH08192596A - Composite writing material - Google Patents

Abstract

PURPOSE: To facilitate the assembling and replacing of a refill by a method wherein a closely contacted part is formed in a coil spring, energizing a pushing member, to penetrate the rear part of the refill through the spring and fit the rear part of refill forcibly to the pushing member, in a composite writing material, in which the pushing member is forwarded to project the tip end of the refill. CONSTITUTION: Pushing members 4, 5, projecting knock members 4A, 5A from sliding grooves 2A, are fitted into a rear shaft 2, connected to the rear part of a fore shaft 1 and provided with sliding grooves 2A formed therein, while refills 6, 7 are connected to the fore part of respective pushing members 4, 5, which are energized forwardly by a coil spring 8. In such a composite writing material, closely contacting parts 8A are formed at both ends and a plurality of intermediate parts. Refills 6, 7 are penetrated through the sliding holes 3C of both inner shafts 3 to penetrate the refills through the springs 8 and contrive sure penetration by the guide of the closely contacting parts 8A. On the other hand, the rear parts of respective refills 6, 7 are fitted bendably and forcibly into the spherical part 4D of the pushing member 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite writing instrument in which an arbitrary refill is used by protruding from a front end opening hole of a front shaft.

[0002]

2. Description of the Related Art Conventionally, in a composite writing instrument in which a pressing member is moved forward to project the tip of a refill, a coil spring is provided to urge the pressing member rearward in the longitudinal direction.

[0003]

However, in the above-mentioned conventional composite writing instrument, when the rear portion of the refill is inserted into the coil spring in order to press-fit the refill into the pressing member, the rear end of the refill becomes the coil spring. It was caught and very difficult to insert, and in some cases the coil spring was deformed, resulting in malfunction. It is an object of the present invention to provide a composite writing instrument that solves the above problems.

[0004]

In order to achieve the above object, the present invention comprises a front shaft and a rear shaft which is connected to the rear part of the front shaft and has a plurality of sliding grooves extending in the longitudinal direction formed at the rear part. A pressing member that is built in the rear shaft in the same number as the sliding groove and that has a knock portion protruding from the sliding groove and is slidable in the sliding groove in the longitudinal direction; and a refill connected to the front portion of each pressing member. , Consisting of a coil spring for urging the pressing member rearward in the longitudinal direction,
In a compound writing instrument in which the tip of the refill projects from the front end opening hole of the front shaft by advancing the pressing member and locking it to the rear shaft, a close contact portion is formed on the coil spring, and the coil spring is inserted through the rear portion of the refill. The main point is to press-fit and fit the pressing member. Therefore, when the rear portion of the refill is inserted through the coil spring, the rear portion of the refill is guided by the contact portion, so that the rear portion of the refill can be reliably inserted through the coil spring.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. In the rear part of the rear shaft 2, two sliding grooves 2A extending in the longitudinal direction are formed to face each other. Further, a locking protrusion 2B extending in the longitudinal direction from both sides of each sliding groove 2A is formed, and a front end 2C of the locking protrusion 2B is recessed rearward as it goes in the central axis direction. Inclined.
On the inner surface of the front part of the rear shaft 2, a detent portion 2D that is raised inward
Then, two protrusions 2E are formed. The inner shaft 3 is inserted from the tip of the rear shaft 2, the side cut portion 3A of the inner shaft 3 is engaged with the detent portion 2D of the rear shaft 2 and positioned so as not to rotate, and the outer side of the inner shaft 3 is The collar 3B has a protrusion 2E formed on the inner surface of the rear shaft 2 and a protrusion 2F formed on the rotation stopping portion 2D.
Is locked over. Pressing members 4 and 5 made of synthetic resin are slidably inserted in the two sliding grooves 2A of the rear shaft 2 in the longitudinal direction, and knock portions 4A of the pressing members 4 and 5,
5A projects outward from the sliding groove 2A. Pressing members 4, 5
Inclined inner steps 4B, 5B are formed in the rear part, and the inclined inner steps 4B, 5B are inclined so as to protrude rearward as they go in the direction of the central axis. Protrusions 4C and 5C protruding forward are formed at the front ends of the pressing members 4 and 5, and the protrusions 4C and 5C
Spherical parts 4D and 5D are formed in the front part of C. The input pen refill 6 is composed of a conical input member 6A with a rounded tip and a resin pipe 6B into which the rear portion of the input member 6A is press fitted. A synthetic resin may be used as the material of the input member 6A. Two coil springs 8 are stretched in parallel between the inner shaft 3 and the front ends of the pressing members 4 and 5, and the coil springs 8 have contact portions 8A formed at both ends and a plurality of intermediate portions. The resin pipe 6B of the input pen refill 6 is inserted through the sliding hole 3C of the inner shaft 3 and the coil spring 8. At this time, since the resin pipe 6B of the input pen refill 6 is guided by the contact portion 8A of the coil spring 8, the resin pipe 6B is securely inserted into the coil spring 8. The rear portion of the input pen refill 6 is press fit into the spherical portion 4D of the pressing member 4 so as to be bendable. In addition, the resin ink tank 7A of the ball-point pen refill 7 that is normally used is also inserted through the sliding hole 3C of the inner shaft 3 and then inserted through the coil spring 8 while being guided by the contact portion 8A. Spherical part 5D
It is press-fitted to be bendable. The pressing members 4 and 5 are biased rearward in the longitudinal direction by the coil spring 8, and the shoulder portions 4E and 5E of the pressing members 4 and 5 are brought into contact with the rear step 2G of the rear shaft 2.

Although not shown, a disk-shaped portion is formed in front of the protrusion of the pressing member, and the disk-shaped portion is press-fitted into the resin pipe of the input pen refill and the ink tank of the ballpoint pen refill so as to be bendable. Is also good.

Next, the operation of retracting the input pen refill 6 and the ball pen refill 7 will be described. In the retracted state of FIG. 1 described above, when the knocking portion 4A of the pressing member 4 to which the input pen refill 6 is connected is pressed forward by the finger in the longitudinal direction, the pressing member 4 advances in the sliding groove 2A of the rear shaft 2. When the pressing member 4 is appropriately advanced, the inclined inner step 4B of the pressing member 4 falls inward and is locked to the front end 2C of the locking projection 2B of the rear shaft 2, and the input member 6 of the input pen refill 6 is pressed.
A protrudes from the front end opening 1A of the front shaft 1 to be in the state shown in FIG. Moreover, as shown in FIG.
The inclined inner step 4B is inclined so as to protrude rearward as it goes in the central axis direction, and the front end 2C of the locking projection 2B of the rear shaft 2 is inclined so as to be recessed rearward as it goes in the central axis direction. When the inclined inner step 4B of the pressing member 4 is brought into contact with the front end 2C of the locking projection 2B of the rear shaft 2, the pressing member 4 is urged in the central axis direction, and the locking of the pressing member 4 is difficult to disengage. Locked in. Therefore, even if the tip of the input pen refill 6 is strongly pressed in this state to perform an input operation, there is no risk of the pressing member 4 being disengaged. Input pen refill 6
In order to immerse the press member, the pressing member 5 to which the ball-point pen refill 7 is connected is moved forward, and the inner protruding portion 5F formed on the pressing member 5 is brought into contact with the inner pin 4G formed on the pressing member 4 to press the pressing member 5. When 4 is pushed up in the outer peripheral direction, the inclined inner step 4B of the pressing member 4 is disengaged from the locking projection 2B of the rear shaft 2. Therefore, the input pen refill 6 is biased rearward in the longitudinal direction by the elastic force of the coil spring 8 and returns to the state of FIG. When the ball-point pen refill 7 is projected, the same operation as that of the input pen refill 6 is performed.

When the tip of the input pen refill 6 is damaged by repeated input operation, the front shaft 1 is unscrewed from the rear shaft 2 and the input pen refill 6 is pressed, as shown in FIG. It can be easily replaced by removing it from the spherical portion 4D of the member 4 and pressing a new input pen refill 6 into the spherical portion 4D of the pressing member 4. Although not shown, the ball-point pen refill 7 can be similarly replaced. Also in these cases, the input pen refill 6 and the ball pen refill 7 are guided by the contact portion 8A, so that the coil spring 8 can be reliably inserted.

Although not shown, the composite writing instrument of the present invention is not limited to the above-mentioned embodiment, and three sliding grooves are formed at equal intervals on the rear shaft, and the respective sliding grooves are formed. The input pen refill may be connected to one pressing member and the two-color ballpoint pen refills may be connected to the other two pressing members. Further, the refill combination may be a plurality of writing tool refills. Further, the writing tool refill is not limited to a ballpoint pen, and may be a mechanical pencil.

[0010]

According to the present invention described above, the coil spring has a very simple structure in which the contact portion is formed.
When the rear portion of the refill is inserted through the coil spring, the rear portion of the refill is guided by the contact portion, so that the rear portion of the refill can be reliably inserted through the coil spring. Therefore, it is possible to assemble the refill and replace the refill easily and surely, and there is no fear of deforming the coil spring.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a composite writing instrument of the present invention.

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

FIG. 3 is a cross-sectional view taken along line BB of FIG.

FIG. 4 is an enlarged cross-sectional view of a main part showing a coil spring.

FIG. 5 is a cross-sectional view showing a state in which the input pen is replaced.

FIG. 6 is a cross-sectional view showing a state where the input pen is projected.

FIG. 7 is an enlarged cross-sectional view of a main portion showing a locked state of an inclined inner stage of a pressing member and a locking projection of a rear shaft.

[Explanation of symbols]

 1 Front Shaft 1A Front Opening Hole 1 of Front Shaft 2 Rear Shaft 2A Sliding Groove of Rear Shaft 2B Locking Protrusion of Rear Shaft 2 4 Pressing Member 4A Knocking Part 5 of Pressing Member 5 Pressing Member 5A Knocking of Pressing Member 5 Part 8 Coil spring 8A Close contact part of coil spring 8

Claims (2)

[Claims] 1. A front shaft, a rear shaft connected to the rear part of the front shaft, and having a plurality of sliding grooves extending in the longitudinal direction formed at the rear part, and the same number of sliding grooves as the built-in sliding grooves in the rear shaft. A pressing member having a knock portion protruding from the moving groove and capable of sliding in the sliding groove in the longitudinal direction,
It consists of a refill connected to the front part of each pressing member and a coil spring for urging the pressing member rearward in the longitudinal direction. By pushing the pressing member forward and locking it on the rear shaft, the tip of the refill is moved forward. A composite writing instrument projecting from a tip opening hole, wherein a close contact portion is formed on the coil spring, and a rear portion of the refill is inserted into the coil spring and press-fitted into a pressing member. 2. One of the refills is composed of an input pen,
The composite writing instrument according to claim 1, wherein the other refills are constituted by a writing instrument such as a ballpoint pen.