JPH04115694U - Brush type writing instrument - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent ink or liquid ink filled and stored in the barrel from being pushed out of the barrel due to expansion of internal air due to temperature rise and leaking from the tip of the brush. The purpose of the present invention is to provide a brush-type writing instrument which is designed to prevent [Structure] The writing instrument includes a head shaft (3) that holds a brush (1), a neck shaft (4) connected to the head shaft, and a neck shaft filled with ink or ink that is connected to the neck shaft. It consists of a trunk shaft part (7). The neck shaft portion 4 has a cylindrical portion (6) that communicates with the inside of the body shaft portion (7) via an ink introduction tube (5) provided therein, and constitutes a space (b) that communicates with the brush. ) has been inserted. In this way, by compressing the barrel shaft (7) with your fingertips, the ink or ink flows from the barrel shaft to the ink introduction tube (5), the space (b), and the cylindrical portion (6).
and the inner wall of the neck shaft (4) to reach the tip of the brush (1). When you release your fingertips, air passes in the opposite direction of the ink or liquid ink and enters the inside of the barrel.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention uses a thick brush with a soft plastic barrel and an ink brush. Store ink or liquid ink, and when in use compress the outer wall of the barrel with your fingertips. A writing instrument that allows liquid ink to reach the tip of the brush, especially to prevent ink from leaking. This invention relates to a brush-type writing instrument equipped with a locking device.

0002

[Conventional technology]

This type of writing instrument is used for writing with a brush, so the brush at the tip may be exposed to a large amount during use. Requires ink or liquid ink, so approximately 10ml of ink or liquid ink is required. It is equipped with a barrel shaft having a volume capable of storing ink.

0003

[Problem that the idea aims to solve]

The ink or liquid ink on the barrel expands due to the rise in temperature and is pushed out of the barrel. When the ink or liquid ink immediately reaches the tip of the brush, it leaks from the tip of the brush. cause trouble.

0004 In general, if the ink reservoir is full of ink, the ink will be affected by the increase in temperature. Since the expansion is small, it has little effect on the ink, but the When the temperature rises, the space in the storage section is occupied by air, so when the temperature rises, the air The expansion of the ink affects the ink, making it more likely to leak. In particular, the ink storage volume is large, if the temperature rises when there is little ink in the reservoir. , there is much more leakage than the tip of the brush.

[0005] The expansion rate of gas is 1/273, so if the temperature rises by 27°, the gas will It will expand by 1/10. Therefore, the storage volume of ink is 10ml. , if 2ml of ink remains, the space will have 8ml of air. Therefore, if the temperature rise was 27°, the air expansion would be It is 0.8ml. If the writing brush of the writing instrument is placed facing down, the ink storage 0.8ml of ink is pushed out from the part and reaches the brush, and the Most of the ink drips from the tip of the brush.

[0006] In order to solve this problem, a device with a built-in ink leakage prevention device was developed. Although it is commercially available, the ink storage capacity is reduced by the volume of the built-in device part. It had the disadvantage of doing so.

[0007] The purpose of this invention is to solve the above-mentioned problems and to provide a sufficient amount of ink or liquid to the barrel shaft. While filling and storing ink, we have devised a way to prevent ink from leaking from the tip of the brush. The purpose of the present invention is to provide a brush-type writing instrument.

[0008]

[Means to solve the problem]

The brush-type writing instrument according to the present invention has a head shaft part that holds the brush at the tip, and a head shaft part that holds the brush at the tip. The neck shaft to be joined and the soft material filled with ink or ink connected to this neck shaft. It consists of a plastic body shaft, and an ink introduction installed in the neck shaft. A cylindrical part that communicates with the inside of the body shaft via a tube and forms a space that communicates with the brush. is inserted.

[0009]

[Effect]

Ink or liquid ink can be removed from the barrel by lightly compressing the barrel with your fingertips. the ink introduction tube, the space between the ink introduction tube and the cylindrical section, and the space between the cylindrical section and the inner wall of the neck shaft section. It passes through the gap to reach the tip of the brush. When you remove your fingertips, the ink or liquid ink will pass through. Air passes in the opposite direction and flows into the interior of the barrel shaft. Inside due to rising temperature When ink or liquid ink is pushed out of the barrel due to air expansion, the ink or ink Liquid ink does not reach the brush directly, but instead accumulates in the space, so leakage from the brush does not occur. No.

0010

【Example】 A preferred embodiment of the writing instrument according to the present invention will be described in detail with reference to the accompanying drawings. , FIG. 1 shows a longitudinal section of a writing instrument, and the brush 1 is made of horse hair, wool, or a bundle of synthetic hair. The base is hardened with adhesive, and the cylindrical ring 2 is fitted and fixed with adhesive. Also, a very small hole (not shown) is used to guide ink or liquid ink from the center. is formed at the center of the base of the brush. The cylindrical ring 2 has its A plurality of ink guide grooves e extending in the axial direction on the outer circumference and a radial ink guide groove e in the rear end. The guide groove e' is provided with a guide groove e'. The brush 1 is inserted into the head shaft part 3 from behind, and the brush 1 is inserted into the head shaft part 3 from behind. The head 2 is brought into contact with the annular protrusion 3' provided on the inner peripheral surface of the head shaft 3. It is held within the shaft portion 3. The neck shaft portion 4 has an inner side supported by a partition wall 4'. A tank introduction pipe 5 is provided in the axial direction, and the front end is closed with an end wall 6' and the rear end is open. The cylindrical part 6 is inserted into the neck shaft part 4 from the front end, and the rear end surface is connected to the partition wall 4'. is positioned in contact with the Thus, the ink introduction tube 5 is surrounded by the cylindrical portion 6. , an annular space b is formed between them. The ink introduction tube 5 has a front end and a cylindrical The dimensions and shape are such that a very small gap is created between the inner surface of the end wall of the portion 6 and the inner surface of the end wall of the portion 6. circle The cylindrical portion 6 has a diameter that forms a small gap between it and the inner wall of the neck shaft portion 4. In addition, as shown in FIG. It is provided with a plurality of ink guide grooves (c) that fit into the inner wall of the neck shaft part 4 on its outer periphery at the front end. A plurality of ink guide grooves d are formed in the flange d'. these inks The guide groove d is positioned so as to cooperate with the ink guide groove e of the cylindrical ring 2. Ru. The head shaft part 3 and the neck shaft part 4 are the end surfaces of the brush 1 to the cylindrical ring 2 and the end wall of the cylindrical part 6. 6' and are joined by screwing. Fill with ink or ink The filled barrel shaft portion 7 is connected to the neck shaft portion 4 by screwing, and at this time, the ink introduction tube 5 A rear extension a of the barrel is inserted in a sealed manner into the barrel shaft 7 and communicates with the interior thereof. Trunk shaft part 7 is made of a soft plastic material that can be deformed by applying external pressure. There is.

[0011] When the outer wall of the barrel shaft 7 is compressed with your fingertips, the ink or liquid filled in the barrel shaft 7 will be released. Ink passes from the rear extension part a through the ink introduction tube 5, and is connected to the end wall of the cylindrical part 6 and the ink introduction tube. The ink enters the annular space b through the gap between the pipe and the ink guide part c of the cylindrical part 6, and the cylindrical part The ink guide portion d of the cylindrical portion 6 passes through the gap between the outer wall of the cylinder portion 6 and the inner wall of the neck shaft portion 4. The ink passes through the ink guiding portions e and e' of the cylindrical ring 2 and reaches the brush 1. of the trunk shaft part 7 When you release your fingertips that were compressing the outer wall, air passes in the opposite direction of the ink, and the cylinder axis Enter the interior of section 7.

0012 The ink or liquid ink on the barrel shaft 7 is caused by the expansion of the internal air due to the rise in temperature. When pushed out from the brush 7, the ink or liquid ink directly reaches the brush 1 at the tip. It will not reach there and will accumulate in the annular space b. This annular space is exactly pushed out. It forms a buffer area for ink or liquid ink from the tip of the brush. To prevent ink from leaking.

[0013]

[Effect of the idea]

The writing instrument bottle leakage prevention device according to the present invention essentially involves inserting the cylindrical part into the neck shaft. Since it is constructed by Moreover, since it is built into the neck shaft, more ink or liquid can be stored in the body shaft. It can be filled and stored with ink. In addition, in conventional writing instruments of this type, the inside of the barrel When the ink or liquid ink is used up, it is difficult to replenish the ink or liquid ink due to its structure. However, the structure of the writing instrument according to the present invention makes it easy to replenish them. It has the advantage of being able to Therefore, the writing instrument according to the present invention can be used for a long time and is easy to use. Since there is no ink leakage due to stool, it is ideal for use in calligraphy by children and students.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing the main parts of a brush-type writing instrument according to the present invention.

FIG. 2 is a cross-sectional view of a cylindrical ring that secures a bundle of brushes.

FIG. 3 is a perspective view of a cylindrical portion inserted into the neck shaft portion.

[Explanation of symbols]

1 Brush 2 Cylindrical ring 3 Head axis 3' Annular protrusion 4 Neck shaft 4' Partition wall 5 Ink introduction tube 6 Cylindrical part 6' end wall 7 Trunk axis a Rear extension b Annular space c Ink guide groove d Ink guide groove d' flange e Ink guide groove e' Ink guide groove

Claims (1)

[Scope of utility model registration request] Claim 1: A head shaft portion that holds a brush at the tip, a neck shaft portion joined to the head shaft portion, and a body shaft portion made of soft plastic filled with ink or liquid ink and connected to the neck shaft portion. A brush-type writing instrument in which a cylindrical part that communicates with the inside of the body shaft and forms a space communicating with the brush is inserted into the neck shaft through an ink introduction tube provided therein.