JPS5914229Y2 - brush pen - Google Patents

Description

[Detailed description of the invention] This invention relates to a brush pen in which the upper layer is an integrally molded porous tip, and a writing part with a core member provided in the center is attached to the tip of the barrel, and its purpose is to The key is to devise ways to give it the strength of a regular calligraphy brush.

Generally, porous materials such as porous synthetic resins are extremely flexible, and even if they are formed into a tip shape, the desired stiffness cannot be obtained.

In addition, in the case of a structure in which a hollow part is provided in such an integrally molded porous brush tip and a core member is inserted into this hollow part, the conventional core member is made of, for example, fibers whose intertwined parts are joined with an appropriate adhesive. Because a relatively rigid material such as a bundle or a porous material with the surface contact points of thermoplastic synthetic resin spheres welded together was used, the front part of the tip without a core member and the one with a core member were used. The rear part of the tip of the brush gave the scribe a noticeably different feel, and compared to a normal brush, there was another drawback that it did not feel right.

This invention was devised to eliminate the above-mentioned drawbacks, and the core member 4 to be inserted into the hollow part 3 of the integrally molded porous brush tip 2 fitted onto the tip of the barrel 1 is made of rubber. It has a solid core made of elastic material.

This rubber-like elastic material may be natural rubber or synthetic rubber.

In the illustrated example, the core member 4 has an ink groove 5 formed on its surface over almost its entire length, and its rear end portion further protrudes from the rear end surface 6 of the porous brush tip 2. The ink is inserted into and communicates with the ink storage body, which is the ink storage body, and thus the ink is supplied to the front along the ink groove 5 in the ink storage body.

However, even if there is no ink groove 5 and there is no part that protrudes further from the rear end surface 6 of the porous brush tip 2, ink can also be injected by bringing the rear end surface 6 of the porous brush tip 2 into direct contact with the ink storage body. Ink can be transferred from the storage body without any problem.

In addition, although 8 in the figure is an air circulation hole provided in the shaft tube 1, this may be provided on the inner wall surface of the front end portion of the shaft tube 1 where the brush tip 2 is fitted.

The core member 4, which is a solid core made of a rubber-like elastic material, does not exhibit capillary action unlike conventional relay cores.

However, since it has elastic properties similar to the porous brush tip 2 in the upper layer, it provides stiffness without causing any discomfort that would make it obvious that a foreign object has been inserted when writing. Can be done.

In addition, no matter how much pressure is applied to the paper surface, there is a sufficient pressure-receiving contact surface between the 3 sides of the hollow part of the sponge-like soft brush tip 2 and the 4 sides of the core member, which is a solid core made of rubber-like elastic material, so that tearing may occur. It is less likely to occur and has a practical effect in that the structure is simple.

Note that the ink chamber 7 may be used as a green ink chamber instead of an ink storage body.

[Brief explanation of the drawing]

The figure is a partially sectional view showing the main parts of this invention. DESCRIPTION OF SYMBOLS 1... Shaft tube, 2... Integrally molded porous tip, 3... Hollow part, 4... Solid made of rubber-like elastic material. A core member which is a core body, 5... Ink groove, 6... Rear end surface of brush tip, 7... Ink chamber.

Claims (1)

[Scope of utility model registration request] 1. An integrally molded porous brush tip 2 that is fitted onto the tip of the shaft tube 1
A brush pen in which a core member 4 to be inserted into a hollow part 3 is a solid core made of a rubber-like elastic material. 2. The core member 4, which is a solid core made of a rubber-like elastic material, has ink grooves 5 perforated over almost the entire length on its surface, and the rear end portion of the core member 4 is located behind the porous brush tip 2. The brush pen according to claim 1, which is a utility model registered, and which further protrudes from the end face 6 and is inserted into and communicates with the ink storage body of the ink chamber 7 in the barrel barrel 1.