JP2606957Y2 - Writing implement - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a writing implement in which raw ink is stored in a rear inner hole of a barrel so that the rear part of the barrel is used directly as an ink tank.

[0002]

2. Description of the Related Art A writing instrument of the kind described above is a kind of so-called raw ink type writing instrument, and has recently been widely used as a pen for plotters. In other words, there are two types, one in which the barrel is formed to have a bottomed shape, and the other in which a tail plug is fixed to the barrel having a rear end opening. The latter relates to the present invention.

[0003]

When the total length of the barrel is increased so as to accommodate a large amount of ink, the shape instability such as warping and bending accompanying the fabrication increases. Here, the barrel is
Generally, it is produced by injection molding of a synthetic resin.

[0004] The use of a tail plug is advantageous in that it can be used as a common component of a barrel if the tail plug is used to indicate the type of a writing instrument such as the type of a pen point, the width of a handwriting, and the color of ink. However, if the tail plug is only used as a mere plate-shaped rear portion, the usable area is small, and the angle range in which the display is visually confirmed is narrow. Furthermore,
The tail plug is attached so that it can be inserted into the inner wall of the barrel.
The inner diameter of the tail plug is larger than the inner diameter of the barrel.
Although it is a small diameter, the inside of such a tail plug can also be
When used as part of a tank, the inner diameter of the
The ink flow to the pen tip may be impeded.
It was a potential one. Also, take up such a barrel
Ink may be retained inside the attached tail plug
The writing instrument is affected by changes in temperature around the writing instrument.
And the inside of the barrel where space exists (where air exists)
How the temperature is transmitted is different from the inside of the tail plug where the key exists
Therefore, strain occurs at the joint between the barrel and the tail plug.
It was possible Strain occurs at the joint of this member
If this occurs, there is a risk that ink will leak from this portion.

[0005]

According to the present invention, there is provided a writing instrument comprising a freshly-inked ink stored in a rear inner hole of a barrel having a tail plug fixed to a rear end thereof, thereby directly using the rear part of the barrel as an ink tank. The tail plug has a bottomed cylindrical shape that accommodates ink therein and becomes a part of an ink tank together with the rear portion of the barrel, and is provided on the inner wall of the barrel and the inner wall of the tail plug.
By providing independent longitudinal continuous ribs
Between the rib on the inner wall of the barrel and the rib on the inner wall of the tail plug.
A writing implement which forms a circumferential space portion without ribs and uses a peripheral wall portion of the tail plug protruding rearward from the shaft cylinder for type display. Is the gist.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example will be described with reference to FIG. It is an example of a small tube type writing implement in which a small tube pen tip 1 is projected from a tip of a tip holder-2. Further, the shaft cylinder 3 into which the tip holder 2 is inserted and fixed from the front end has a flange 4 for attachment to the apparatus main body such as a plotter on the outer wall based on the above description, and is made of a transparent material. It is preferable that

A temporary ink reservoir 5 having a temporary ink reservoir having a comb-like longitudinal section is disposed inside the barrel 3. A sealing elastic member fitted to the rear end of the temporary ink reservoir 5 is provided. A rear inner hole of the shaft cylinder 3 partitioned by the ring 6 is an ink storage portion in a raw ink state. That is, the shaft cylinder 3
The rear part 7 is an ink tank directly without using a separate ink tank. An appropriate number of ribs 8 are formed on the inner wall to smoothly move the ink.

The rear end 9 of the shaft cylinder 3 is open, and a tail plug 10 having a slightly small diameter and a bottomed cylindrical shape is fixed so as not to leak liquid. Adhesion or the like may be used, but it is easy and reliable to mount both the barrel 3 and the tail plug 10 by injection molding of a synthetic resin and attach them by ultrasonic welding. In this regard,
It is preferable to use the same type of synthetic resin.

The tail plug 10 is also a part of the ink tank, and has an appropriate number of ribs 1 on the inner wall, like the rear part 7 of the barrel 3.
No. 1 is formed to facilitate the movement of the ink. The tail plug 10 protrudes rearward from the rear end 9 of the barrel 3, thereby increasing the amount of ink to be stored and using the widely exposed peripheral wall portion 12 for type indication. Although not shown in the drawings, for example, the entire tail plug 10 is colored in ink color, or the peripheral wall portion 12 is printed with ink color, and is used for ink color display. Also, for example, stamping, printing, molding, etc. It is used for displaying the type of the pen point and the width of the handwriting depending on the time relief and the like.

The projection 13 near the tip of the outer wall of the tail plug 10 is for preventing backlash when the tail plug 10 is mounted on the barrel 3. In addition, other writing instruments such as a ball-point pen may be used, and the detailed description of the internal structure is omitted.
Reference numeral 4 denotes an elastic body, reference numeral 15 denotes a pressing body made of a fiber convergent body urged forward by the elastic body 14, and reference numeral 16 denotes a needle protruding and fixed to the pressing body 15, respectively. Further, in the above, an appropriate structure for stabilizing the ink discharge is adopted, such as one for general writing by grasping with a hand, or one that forms a spiral space between the inner wall of the shaft cylinder, and a temporary ink reservoir. The sealing elastic ring may be omitted, for example, when the member can be directly sealed.

[0011]

[Effect of the Invention] The writing implement of the present invention is a writing implement which uses a rear portion of the barrel directly as an ink tank by storing raw ink in a rear inner hole of the barrel having a tail plug fixed to the rear end. The tail plug is formed into a bottomed cylindrical shape so as to contain ink therein and become a part of an ink tank together with a rear portion of the barrel, and the inside of the barrel and the inside of the tail plug are formed.
Provide independent longitudinally continuous ribs on each wall
At the same time, between the rib on the inner wall of this barrel and the rib on the inner wall of the tail plug
Form a circumferential space where none of the ribs are present ,
Since the peripheral wall of the tail plug that protrudes backward from the barrel is used for type indication, the shape of the preparatory parts can be shortened, so that a large amount of ink can be stored as a stable shape.
In addition, the movement of the ink in the ink tank becomes smooth.
Further, the type display in a wide area is ensured.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention.

[Explanation of symbols]

1 canalicular nib 2 chip holder 3 barrel 4 mounting flange 5 temporary ink reservoir member (6) sealing elastic ring 7 barrel rear 8 ribs 9 barrel at the rear end 10 breechblock 11 rib 12 peripheral wall 13 protruding in 14 Elastic body 15 Pressing body 16 Needle body 17 Space

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) B43K 8/02 B43K 5/02 B43K 17/00 B43L 13/00

Claims (1)

(57) [Scope of request for utility model registration] 1. A writing instrument comprising a raw ink in a rear inner hole of a barrel having a tail plug fixed to a rear end thereof, thereby directly using the rear part of the barrel as an ink tank.
The tail plug has a bottomed cylindrical shape so as to contain ink therein and become a part of an ink tank together with a rear portion of the shaft cylinder, and is independent of the inner wall of the shaft cylinder and the inner wall of the tail plug, respectively.
With a continuous rib in the longitudinal direction
Any rib exists between the rib on the wall and the rib on the inner wall of the tail plug.
A writing implement that forms a non-circular space, and uses the peripheral wall of the tail plug that protrudes rearward from the barrel to indicate the type.