JP2578273Y2 - Writing instrument cap with eraser - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cap with a erasing tool for a writing instrument having a recess in a head and press-fitting an erasing tool into the recess.

[0002]

2. Description of the Related Art Japanese Unexamined Utility Model Publication No. 51-139030 discloses an example of a cap with an eraser having a concave portion in a head and an eraser press-fitted into the concave portion. A cap is shown. In addition, a cap for a ball pen containing a correction liquid and a cap having a solid correction tool are also known as erasers.

[0003]

The depth of the recess for fixing the eraser press-fitted into the cap cannot necessarily be made long from the viewpoints of design restrictions, ease of use, and ease of molding. However, there is a problem that the eraser is easily detached when the depth of the concave portion is reduced.

[0004]

According to the present invention, there is provided a cap with a erasing tool for a writing instrument having a recess in a head and press-fitting the erasing tool into the recess , wherein a convex portion is provided on a bottom wall of the recess.
And a rib extending in the longitudinal direction is formed on the inner wall.
In addition, the protrusion of the bottom wall is press-fitted into a hole formed in the eraser.
The gist of the present invention is a writing instrument cap with an eraser.

[0005]

FIG. 1 is a sectional view showing an embodiment of the present invention. Reference numeral A denotes a cap which is a synthetic resin injection-molded product such as polyester. The head 1 of the cap A has a recess 2.

The recess 2 has a projection 4 on the bottom wall 3 thereof. The shape of the convex portion 4 is a taper shape in which the diameter of the top portion 5 is reduced toward the tip, but it may be a cylindrical shape having no taper portion.

[0007] The side wall 6 of the concave portion 2 has a plurality of ribs 7 (dotted line portions) toward the opening side. This rib 7
Thus, a gap (not shown) is formed between the eraser B and the side wall 6. When the eraser B is attached, the gap allows the air in the recess 2 to pass therethrough and escape. still,
The shape of the eraser may be determined so that the inner diameter of the concave portion 2 is a polygon such as a triangle or a quadrangle, and a press-fit state is formed while a gap is formed between the eraser B and the concave portion 2.

The eraser B has a hole 8 into which the projection 4 is press-fitted.
have. When the eraser B is attached to the recess 2, the eraser B is press-fitted and fixed by the side wall 6 of the recess 2 and the projection 4. At this time, a protrusion, a slit, or the like is provided on the side wall of the projection 4 to increase the frictional resistance with the eraser B, and the fixing of the eraser B can be further ensured.

Here, as the eraser B, an eraser made of vinyl chloride or a thermoplastic elastomer, a solid correction tool made of a terpene resin, a high molecular compound such as a thermoplastic elastomer or oil and fat and titanium dioxide, a correction fluid, and the like Can be illustrated.

The writing instrument insertion portion 9 of the cap A has its bottom 1
0 has a concave portion 11 corresponding to the convex portion 4 of the bottom wall 3 of the concave portion 2. A disc-shaped elastic body 12 is provided on the bottom 10.
Is located.

The side wall 13 of the writing instrument insertion section 9 has a slit 14 in the longitudinal direction and a rib 15 for fitting the writing instrument.

As shown in FIG. 2, when the writing implement C is mounted on the cap A, the pen tip 16 of the writing implement C comes into contact with the disc-shaped elastic body 12, and the disc-shaped elastic body 12 The tip of the pen tip 16 is pressed and urged toward the inside of the pen 11 to make the pen tip 16 airtight while deforming. In addition, as a writing instrument,
Lupen, small tube type writing instrument, sharp pencil and the like can be exemplified.

[0013]

[Effects of the Invention] As described above, the cap with the eraser of the writing implement of the present invention can securely fix the eraser without being affected by design restrictions, ease of use, and ease of molding. Can be made.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing one embodiment.

FIG. 2 is an explanatory view of the state of FIG. 1;

[Explanation of symbols]

 A Cap B Eraser C Writing tool 1 Head 2 Depression 3 Bottom wall 4 Convex part 5 Top 6 Side wall 7 Rib 8 Hole 9 Writing instrument insertion part 10 Bottom 11 Recess 12 Elastic body 13 Side wall 14 Slit 15 Rib 16 Pen tip

Claims (1)

(57) [Scope of request for utility model registration] 1. A cap with an eraser for a writing instrument having a recess in a head and press-fitting and fixing the eraser in the recess , wherein a convex portion is formed on a bottom wall of the recess and a longitudinal portion is formed on an inner wall.
A hole that forms an extending rib and that is formed in the eraser
A cap with an eraser for a writing implement , wherein the convex part of the bottom wall is press-fitted into the part .