JPH051423Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is applied to a brush-tip fixing tube of a brush-like writing instrument that uses a brush tip that can be used for brushes, sketching brushes, makeup brushes such as eyeliner, etc. More specifically, the brush tip includes a brush tip having a bundle of fibers and a fixed base, an ink reservoir disposed at the rear of the brush tip and forming an ink reservoir, and a base of the brush tip and the ink reservoir. A brush tip fixing tube of a brush-like writing instrument, which is made by fixing to a shaft tube a brush tip fixing tube which is clamped to the body and has an ink guide inserted into the center hole of the ink reservoir body and sequentially inserted therein. It is related to the structure of.

(Prior art) As shown in FIG. 7, in a conventional brush-like writing instrument, the flange 11 formed at the base of the brush tip 10 by heat welding or molding with another curable resin does not have an ink conductive effect. A hollow hole was formed in the center of the flange, and the narrow diameter part 41 of the ink guide core 40 was inserted into the center hole to guide ink from the ink guide core to the tip of the brush tip.

Although not shown, a structure is also known in which a slot is provided on the bottom surface of the flange and ink from the ink guide core is guided to the tip of the tip through the slot.

(Problems to be solved by the invention) However, in the conventional brush-like writing instrument shown in Fig. 7, if the diameter of the hollow hole provided in the center of the brim and the narrow diameter part of the ink guide core is not large, the ink will not reach the brush tip. Due to the lack of supply, there were the following problems.

1 When the hole becomes larger, there will be a certain degree of eccentricity variation due to manufacturing, so there will be a difference in the amount of ink ejected between the thinner side and the thicker side of the cross section of the brush tip, resulting in variations in ink ejection depending on the writing direction. .

2. When the center hole becomes large, the center of the tip of the brush is missing and there is not enough fiber material in the entire tip of the tip of the brush, resulting in weak handwriting. Furthermore, if the lack of fiber material is compensated for, the diameter of the brush tip increases, making the barrel thicker than necessary and making it difficult to write small letters.

In addition, in the conventional example where a slot is provided on the bottom of the flange,
The contact between the ink guide core and the bottom surface of the brim of the brush tip tends to be uneven, and there is a problem in that the contact becomes poor due to impact such as dropping, resulting in unstable ink supply.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention supplies ink from the ink guide to the tip of the brush without providing a hollow hole or slot in the flange. This is an attempt to solve the conventional problems by forming ink outflow grooves on the inner surface of the fixed tube, and the invention consists of a brush tip made of bundled fibers and a fixed base, and an ink reservoir located at the rear of the brush tip. an ink reservoir formed with an ink reservoir, and an ink guiding core which is clamped to the base of the brush tip and the ink reservoir and is fitted into a center hole of the ink reservoir, and which are sequentially inserted into the tube. In a brush tip fixing tube of a brush-shaped writing instrument fixed to a barrel, an ink outflow groove is formed on the inner wall of the brush tip fixing tube to communicate a side surface of the brush tip and a clamping part of the ink guide. The gist of this is a fixed brush tip tube with air circulation grooves formed on its outer wall.

(Embodiments) The present invention will be described in detail below with reference to embodiments shown in the accompanying drawings.

FIGS. 1 and 2 show a first embodiment, in which a fixed tube 20 is fitted into a shaft tube 30, and the collar 21 of the fixed tube and the tip of the shaft tube abut and are fixed. The brush tip 10 is inserted into the fixed tube 20, and the flange 11 provided at the base of the brush tip 10 and the stepped portion 22 inside the fixed tube 20 come into contact and are fixed. An ink guide 40 is in contact with the bottom surface of the flange 11 provided at the base of the brush tip 10, and the inner surface of the fixed tube 20 facing the ink guide 40 is located at the front (left side in the figure). An ink outflow groove 24 facing in the direction (direction) is formed. Reference numeral 50 denotes an ink reservoir in which a small diameter part of an ink guide core is arranged in the center, and this ink reservoir 50 has a comb-like ink reservoir part 51 that absorbs excess ink discharged.
The ink reservoir 50 is fitted or loosely inserted into the barrel 30. 31 is an air circulation groove provided in the front shaft 30, and 23 is a fixed pipe 2.
This is an air circulation groove provided on the outer circumferential surface of 0. FIG. 3 shows a second embodiment in which air circulation grooves 23 are provided on the inner surface of the fixed tube 20.

FIG. 4 shows a third embodiment, in which an ink outflow groove 24 is formed in the inner surface of a fixed tube 20 in the form of a single or double spiral groove.

FIGS. 5 and 6 show a fourth embodiment, in which an ink outflow groove continuous to the outside and inside of the fixed tube 20 is provided in the vicinity of the air circulation groove 23. FIG.

(Effects of the Invention) The present invention includes a brush tip in which fiber materials are bundled and a base fixed to the brush tip, an ink reservoir formed with an ink reservoir portion arranged at the rear of the brush tip, and a base portion of the brush tip and the ink reservoir portion. A brush tip fixing tube of a brush-like writing instrument, which is made by fixing to a shaft tube a brush tip fixing tube which is clamped to the body and has an ink guide inserted into the center hole of the ink reservoir body and sequentially inserted therein. In the brush tip fixing tube, an ink outflow groove is formed in the inner wall of the brush tip fixing tube to communicate the side surface of the brush tip and the clamping part of the ink guide core, and an air circulation groove is formed in the outer wall of the ink outflow groove. Therefore, the ink at the tip of the ink guide permeates into the brush tip through the ink outflow groove formed on the inner surface of the brush tip fixing tube. This ensures a stable supply of ink to the brush tip, and since there is no hole in the tip of the brush tip, there is no variation in ink output depending on the direction of the tip of the brush tip, and the large amount of fibrous material in the tip allows for excellent handwriting. Since the brush tip can also be used, it can also be used for writing lowercase letters.

[Brief explanation of drawings]

FIG. 1 is a front sectional view of the main parts of the first embodiment of the present invention;
Fig. 2 is a sectional view taken along the line A-A of the fixed pipe shown in Fig. 1, Fig. 3 is a cross-sectional view of the fixed pipe of the second embodiment, and Fig. 4 is a cross-sectional view of the fixed pipe of the third embodiment.
FIG. 5 is a cross-sectional view of the fixed tube of the fourth embodiment, and FIG. 6 is a cross-sectional view of the fixed tube of the fourth embodiment.
A sectional view taken along the line B, and FIG. 7 is a front sectional view of a main part of a brush-like writing instrument according to the prior art. 10... brush tip, 11... flange, 20... fixed tube, 22... step, 23... air circulation groove, 24...
... Ink outflow groove, 30 ... Shaft cylinder, 40 ... Ink guide core, 50 ... Ink reservoir.

Claims (1)

[Scope of utility model registration request] an ink reservoir formed with an ink reservoir disposed at the rear of the brush tip; In the brush tip fixing tube of a brush-like writing instrument, the brush tip fixing tube has a brush tip fixing tube in which an ink guide inserted into a central hole of an ink reservoir is sequentially inserted and arranged, and the brush tip fixing tube is fixed to a shaft tube. A brush tip fixing tube having an ink outflow groove communicating between the side surface of the brush tip and the clamping part of the ink guide on the inner wall of the tube, and an air circulation groove formed on the outer wall of the ink outlet groove.