JPH056153Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a marking pen for fine characters.

[Prior art and its problems]

A marking pen has a pen body made of plastic or fiber molded into a rod shape, which is fixed to the barrel or tip opening of the nib, with the tip of the pen protruding from the barrel, and the rear end of the pen body is used as an ink absorber. It is designed to be inserted and used to transfer water-based ink to the tip of the pen body for writing.

By the way, the thickness of the handwriting is determined by the outer diameter of the pen body, so the pen body of a fine marking pen is
Naturally, thin pens are used, and recently, thin ones with an outer diameter of 2 mm or less are also being used. However, such thin pen bodies are weak in strength, and when a large writing pressure is applied, the part of the pen body that protrudes from the barrel may break or buckle, making it impossible to write. In addition, because the pen body is thin, it wears out quickly when writing, which is a problem in that the life of the writing instrument is short.

[Purpose of invention]

Therefore, although the pen body is thin, the pen body does not bend or buckle even when writing with large pressure, and wear on the pen body is alleviated, resulting in a long life. The object of the present invention is to provide a marking pen for fine print.

[Structure of the idea and its effects]

The fine print marking pen of this invention has an outer diameter of 2 mm.
It has a rod-shaped pen body with a diameter of less than φ, and this pen body is attached to the barrel so that it can move back and forth, and is urged forward by the elastic force of a spring, and the rear end of this pen body is , is characterized in that it is retractably inserted into a space formed in a batting that occludes water-based ink.

In other words, since the outer diameter of the pen body is 2 mmφ or less, the strength of the pen body itself is low, but it is attached to the barrel so that it can move back and forth, and is biased forward by the elastic force of the spring. Because it has a cushioning function, the pen body retreats when a large amount of writing pressure is applied, so it does not break or buckle. Because of this cushioning function, the frictional resistance at the tip of the pen body is alleviated, reducing wear and thus extending the life of the pen.

〔Example〕

The present invention will be specifically described below based on embodiments shown in the drawings.

In FIG. 1, a plurality of ribs 11 are formed inside the tip of the barrel 1, and the ink storage body 2 is housed with its tip surface in contact with the ribs 11. The ink storage body 2 is formed into a rod shape by aligning crimped ultrafine fibers such as polystyrene, and has a large storage capacity for water-based ink. A tip 3 is fitted into the opening at the tip of the shaft cylinder 1, and a cylindrical portion 31 is integrally connected to the rear of the tip 3. The pen body 4 is made of plastic or fibrous material molded into a rod shape, and is extremely thin with an outer diameter of 2 mm or less, and is housed within the tip 3 so as to be freely movable back and forth. A large diameter part 41 is formed in the middle part of the pen body 4, and this prevents the pen body 4 from falling out from the tip 3. A spring 5 is interposed between the caulked portions 32 of. The rear end of the pen body 4 is inserted into the ink storage body 2, and the water-based ink within the ink storage body 2 is transmitted to the tip of the pen body 4 and used for writing. There is a small space 21 inside the ink storage body 2, and the pen body 4
is now able to retreat easily.

Next, FIG. 2 shows another embodiment, in which the pen body 4 is fixed to the tip 3 by caulking, and the tip 3 is slidably arranged in the tip opening of the barrel 1. ing. A spring 5 is interposed between the annular piece 6 fixed inside the barrel 1 and the tip 3.
Alternatively, a plate-shaped body (not shown) may be integrally attached to the front end surface of the ink storage body 2 instead of the bridge 6, and a spring 5 may be interposed between this plate-shaped body and the tip 3. good.

Therefore, when writing with a marking pen for fine characters having such a configuration, if large writing pressure is applied to the pen body 4, the pen body 4 will move backward against the biasing force of the spring 5, and if the writing pressure is reduced, it will move forward. and protrudes from the tip 3. Therefore, even though the pen body 4 is thin and weak, it will not break or buckle due to large writing pressure. Furthermore, due to the cushioning action of the spring 4, the frictional resistance at the tip of the pen body 4 is alleviated, reducing abrasion and extending the life of the writing instrument.

[Effect of idea]

As explained above, in the fine-print marking pen of the present invention, the pen body is attached to the barrel so as to be movable back and forth, and is biased forward by the elastic force of the spring, and the rear end of the pen body is is inserted retractably into the space formed in the batting that absorbs water-based ink, so even though the pen body has a thin outer diameter of less than 2 mmφ, when writing with high pressure, A marking pen for fine characters whose pen body does not buckle and whose wear is alleviated can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the present invention, and FIG. 2 is a sectional view of another embodiment. 1... Barrel, 2... Ink absorber, 3... Tip, 4... Pen body, 5... Spring.

Claims (1)

[Scope of utility model registration request] A rod-shaped pen body with an outer diameter of 2 mmφ or less is attached to the barrel so that it can move back and forth, and is biased forward by the elastic force of a spring, and the rear end of the pen body is capable of discharging water-based ink. A water-based marking pen for fine print characterized by being retractably inserted into a space formed in an occluded batting.