JP2587989Y2 - Ink tank for writing implements - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink tank for a writing implement for writing by connecting a writing section to a front portion.

[0002]

2. Description of the Related Art Conventionally, in an ink tank for a writing instrument having a tail plug attached to a main body, the main body and the tail plug are fixed by ultrasonic welding in order to prevent leakage of ink.

[0003]

However, those which are fixed by ultrasonic welding require large-scale equipment, complicate the production process, and increase the cost. In addition, the materials of the main body and the tail plug are limited to the synthetic resin, which is very limited in design. An object of the present invention is to provide an ink tank for a writing instrument that solves the above-mentioned problems.

[0004]

According to the present invention, a rear opening of a main body is provided.
Form a groove appropriately extending in the longitudinal direction from the rear end at the mouth, and
An elastic ring is provided on the tail plug. Tail at the rear opening of the body
Press-fit the stopper and secure the elastic ring to the rear opening.
Compressed by the rear inner surface of the main body located in front of
Construct an ink tank for writing instruments that is sealed and does not leak ink.

[0005]

FIG. 1 shows an embodiment of the present invention.
As shown in FIG. 3, a fitting portion 1A is formed at the front portion of the synthetic resin main body 1 to which a rear portion of a writing portion (not shown) is connected. The packing 2 is press-fitted slightly behind the fitting portion 1A. When the writing portion is connected to the fitting portion 1A of the main body 1, the packing 2 comes off rearward, and the ink stored in the main body 1 is inserted into the writing portion. It is configured to flow. The rear opening 1B of the main body 1 is provided with a groove 1C extending appropriately in the longitudinal direction for allowing the air in the main body 1 to flow out when the tail plug 3 is press-fitted and fixed. A ring 4 made of an elastic material such as rubber is provided at a front portion of the tail plug 3, and a mounting portion 3 </ b> A of the tail plug 3 includes:
A flange 3B having a front end inclined so as to be easily inserted is formed. The tail plug 3 is press-fitted and fixed to the rear opening 1B of the main body 1, and the o-ring 4 is compressed by the rear inner surface 1D of the main body 1 and the tail plug 3 so that there is no gap between the main body 1 and the tail plug 3 to be sealed. , So as to prevent ink leakage. Therefore, when the tail plug 3 is press-fitted and fixed to the rear opening 1B of the main body 1, the air in the main body 1 flows out from the groove 1C formed in the main body 1, so that the air pressure in the main body 1 does not increase. Also, body 1
Rear inner surface 1D and tail located forward of rear opening 1B
Since the o-ring 4 is compressed by the plug 3, the main body 1 and the tail plug 3
Are securely sealed by the O-ring 4.

The writing part connected to the ink tank for writing implement of the present invention can be used for any ink using a fountain pen or a pipe pen.

Further, it goes without saying that the ink tank for writing implements of the present invention can be used not only for handwritten writing implements but also for plotter writing implements.

Further, the members such as the main body 1, the packing 2, and the tail plug 3 described in the above embodiment are not limited to synthetic resins but may be made of metal formed by press molding or cutting. As described above, it is sufficiently conceivable that the tail plug 3 is made of metal when the variety is small.

[0009]

[Effect of the Invention] The ink tank for a writing instrument of the present invention described above can be produced with simple equipment and a simple manufacturing process, is low in cost, and the main body and the tail plug can be securely sealed, so that ink may leak. There is no one. Furthermore, the main body
The rear opening has a groove that extends in the longitudinal direction as appropriate from the rear end.
The tail plug is press-fitted into the rear opening and fixed.
When press-fitting, air inside the body can be exhausted through the groove,
With the effect that the internal air pressure does not increase
It is.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an ink tank for a writing instrument according to the present invention.

FIG. 2 is a sectional view showing a main body of the ink tank for a writing instrument according to the present invention;

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 1B Rear opening of main body 1 1D Inner rear surface of main body 3 Tail plug

Claims (1)

(57) [Scope of request for utility model registration] An ink tank for a writing implement for writing by connecting a writing portion to a front portion, wherein a rear opening portion of a main body has a rear portion.
A groove extending appropriately in the longitudinal direction from the end is formed, and the rear opening is formed.
The tail plug provided with an elastic ring is press-fitted and fixed.
Attach the elastic ring to the back of the main unit located ahead of the rear opening.
An ink tank for writing implements, which is compressed and sealed by the inner surface of the part and a tail plug .