JP2006205639A - Coating implement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that a cap used for a conventional writing instrument, preventing not only the rolling of a cap itself of course but also the rolling of a coating implement itself when a cap is attached to the main body considering portability and storage in a pencil case or the like, almost has a height of several mm, and therefore has the danger that for example even about 10 g of weak force will make them roll in these constructions, and that the prior art gains some preventive effect for rolling but produces a little uncertainty because the preventive effect of rolling is performed near the vertex of the protrusion or the point contact on the installation part. <P>SOLUTION: A coating implement comprises: a writing section at the tip section of an axial main body; and a cap covering the writing section being attached in freely detachable manner, wherein the profile of the above axial main body is formed in a circle shape. Moreover, the coating implement is constituted so that the proximity of the insertion end to the axial main body of the above cap is made to be the almost same shape with the profile of the axial main body, other end portion is made to be almost quadrangle shape, and the inscribed circle diameter of this quadrangle is made almost the same diameter with that of the circumscribed circle near the insertion section. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an applicator having a writing portion at a tip end portion of a shaft main body, and a cap covering the writing portion being detachably inserted.

Usually, many caps used for writing instruments are cylindrical because the shaft body is circular. However, in the case of a cylindrical shape, the stationary property is poor, and for example, a cap having a protruding portion formed on the outer peripheral portion of the cap is known. Specifically, at least two or more protrusions are provided at equal intervals on the outer periphery of the cap, so that the applicator itself rolls when the cap is mounted on the main body as well as the cap itself. It is preventing.
Japanese Patent Application Laid-Open No. 2002-240484.

However, in consideration of portability and storage in a brush case, most of the protrusions are several millimeters in height. In the case of such a configuration, there was a risk of rolling even with a weak force of about 10 grams, for example.
Further, in the above prior art, since the rolling prevention effect is performed in the vicinity of the apex of the protruding portion, that is, in the point contact with the mounting portion, a certain degree of rolling prevention effect can be obtained, but there is a slight lack of certainty. It was.

  The present invention is an applicator having a writing portion at the tip portion of the shaft body, and a cap covering the writing portion is detachably inserted, wherein the cross-sectional shape of the shaft body is formed in a circular shape, The vicinity of the insertion end of the cap with respect to the shaft main body is substantially the same shape as the cross-sectional shape of the shaft main body, and the other end is substantially rectangular, and the inscribed circle diameter of the rectangular portion is the vicinity of the insertion portion. The gist is that the diameter is approximately the same as the circumscribed circle diameter.

  The present invention is an applicator having a writing portion at the tip portion of the shaft body, and a cap covering the writing portion is detachably inserted, wherein the cross-sectional shape of the shaft body is formed in a circular shape, The vicinity of the insertion end of the cap with respect to the shaft main body is substantially the same shape as the cross-sectional shape of the shaft main body, and the other end is substantially rectangular, and the inscribed circle diameter of the square is near the insertion portion Since the diameter is approximately the same as the circumscribed circle diameter, it is possible to provide an applicator having as much as possible stillness.

FIG. 1 shows an example of the present invention. An applicator that contains oil-based ink or water-based ink. The shaft body 1 made of a resin material such as polypropylene, polyethylene terephthalate, or polybutylene terephthalate has a circular cross section and a straight shape that is easy to hold. An insertion hole 3 into which a pen tip 2 made of urethane or a fiber bundle is inserted is formed at the tip of the shaft body 1. On the inner surface of the insertion hole 3, four vertical ribs 4 are formed radially at intervals of 90 degrees. The vertical rib 4 is formed to extend rearward (downward in the drawing) (extension portion 5) and is connected (connecting portion 6) in the vicinity of the rear end portion of the extension portion 5. Further, a step portion 7 is formed on the inner surface of the connecting portion 6, and the pen tip 2 abuts on the step portion 7, thereby preventing the pen tip 2 from entering the shaft body 1. .
Here, a groove 8 is formed between the adjacent vertical ribs 4. The groove 8 is a flow path through which air flows into the shaft body 1 when ink is consumed by use. . Further, a slit 9 penetrating between the adjacent extending portions 5 is formed. And although the nib 2 is hold | maintained by the surface of these vertical ribs 4 and the extension part 5, the surface is hold | maintained in the state which bite in slightly. That is, the pen nib 2 is held in the insertion hole 3 in the press-fitted state by the vertical rib 4 and the extending portion 5.
Further, the rear part of the nib 2 is immersed in a porous ink occlusion body 10 housed in the shaft body 1 and made of cotton or a fiber bundle, and ink is supplied from the immersed part. However, the inside of the shaft body 1 may be directly used as an ink storage portion.

The vicinity of the tip of the shaft body 1 (upper side in the figure) has a tapered shape (thin diameter portion 1a) that is reduced in diameter toward the tip, and a cap to be described later is attached to the rear portion of the narrow diameter portion 1a. The mating protrusion 11 is formed in a circumferential shape.
On the other hand, a tail plug 12 is press-fitted into the rear part of the shaft main body 1, and the press-fitting structure has a circumferential rib 13 formed on the inner surface of the rear part of the shaft main body 1 and an outer peripheral surface of the intermediate part of the tail plug 12. It is made by fitting with the circumferential rib 14 formed in the above. This is to ensure the sealing of the shaft body 1 and the tail plug 12.
A plurality of ribs 15 are radially formed in the longitudinal direction inside the tail plug 12. The rib 15 presses the rear end portion of the ink occlusion body 10, but also holds the outer shape of the front end portion of the tail plug 12. That is, since the tail plug 12 has a cylindrical shape, the ink occlusion body 10 is prevented from entering the tail plug 12. Reference numeral 16 denotes a vertical rib formed on the inner surface of the shaft body 1, and the vertical rib 16 prevents the ink occlusion body 10 from rattling.
By the way, the shaft body 1 and the tail plug 12 are firmly press-fitted and cannot be removed unless a tensile load of about 5 kg or more is applied.

A cap 17 made of a resin material such as polypropylene or polyethylene terephthalate is detachably attached to the front of the shaft body 1. The cap 17 will be described in detail. The cap 17 is composed of an inner cap 18 and an outer cap 19, which are connected by ribs 20, and between the ribs 20 are through holes 21. In the unlikely event that a child or the like has swallowed the cap 17, this is the air flow path.
Further, the outer shape of the insertion end 22 of the cap 17 to the shaft main body 1 is substantially the same circular shape as the outer shape of the shaft main body 1, but the tip of the outer cap 19 is substantially rectangular (square portion 23. ). In this manner, the rear end portion of the cap 17 is circular and the other end portion is rectangular, so that the flat surface portion 24 that expands toward the front end is formed. This plane part 24 becomes a contact part with respect to a mounting part. That is, it is placed by surface contact. The inscribed circle diameter of the rectangular portion 23 is substantially the same as the circumscribed circle diameter in the vicinity of the insertion portion.
In addition, curved portions 25 are formed at the corners of the rectangular portion 23 to improve aesthetics and safety. That is, in the unlikely event that a child or the like has swallowed the cap 17, damage to the mouth and throat is prevented.
The curved portion 25 has a radius of curvature of 5 mm to 10 mm, and the curved portion 25 is smaller than the flat portion 24. Further, by forming a streamlined expansion from the rear end portion of the cap 17 toward the quadrangular portion, the air flow outside the cap 17 is made smooth.

Reference numeral 26 denotes a knurl portion formed on the outer peripheral surface of the rear end portion of the cap 17, which is composed of 48 knurls, prevents slipping when the cap 17 is detached from the shaft body 1, and facilitates attachment / detachment. While improving, the boundary of the shaft main body 1 and the cap 17 is made easy to understand. Further, the rear end portion of the knurled portion 26 has an arc shape and prevents pain on the surface of the finger.
Reference numeral 27 denotes a fitting projection formed on the inner surface of the rear end of the cap 17 and is formed at four positions at equal intervals, but is not limited to the exemplified number. The fitting protrusion 27 can get over and engage with the circumferential fitting protrusion 11 formed on the shaft body 1. During the engagement, the rear end portion of the cap 17 can come into contact with the step portion 28 of the shaft body 1.
Reference numeral 29 denotes a circumferential rib formed on the inner surface of the inner cap 18. When the cap 17 is inserted into the shaft main body 1, it is in contact with the small diameter portion 1 a of the shaft main body 1 in the vicinity of the pen tip 2. Can be sealed. That is, drying of the pen tip 2 and drying of the ink occlusion body 10 are prevented by contact of the circumferential rib 29 with the small diameter portion 1a.
Furthermore, the cap 17 in this example is composed of an inner cap 18 and an outer cap 19, and their thickness (wall thickness) is substantially constant. When the cap 17 is molded by means such as injection molding, depressions (generally referred to as “shrink”) generated on the surface of the molded product are prevented. Moreover, the recessed part is formed in the top | upper surface of the cap 17, and the recessed part becomes the gate G in injection molding. By setting the gate G to a recessed position, the gate G does not protrude, and the stability when the cap 17 described later is placed downward is improved.

  On the other hand, the top surface that is the tip of the cap 17 is a flat portion 17a, and the applicator can be stood and placed on a desk or the like with the cap 17 facing downward. (See FIG. 7). That is, it can be installed with the pen tip 2 facing down. And by making the nib 2 face down, the supply of ink from the ink occluding body 10 to the nib 2 is promoted, and there is no blurring at the time of initial writing, and good writing is obtained. . Incidentally, if the pen tip 2 is left facing upward, the ink may drop due to gravity, and there is a risk that blurring or the like may occur when writing a lot during initial writing.

The front view which shows an example. The left view of FIG. The longitudinal cross-sectional view which removed the cap. The principal part enlarged view of FIG. AA line sectional view of Drawing 3. The longitudinal cross-sectional view which shows a cap. The bottom view of FIG. FIG. 7 is a top view of FIG. 6. The front view which shows the state which stood the applicator.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shaft main body 2 Pen tip 3 Insertion hole 4 Vertical rib 5 Extension part 6 Connection part 7 Step part 8 Groove 9 Slit 10 Ink occlusion body 11 Fitting protrusion 12 Tail plug 13 Circumferential rib 14 Circumferential rib 15 Rib 16 Vertical rib 17 Cap 18 Inner cap 19 Outer cap 20 Rib 21 Through-hole 22 Insertion end 23 Square part 24 Flat part 25 Curved part 26 Knurled part 27 Fitting protrusion 28 Step part 29 Circumferential rib G Gate

Claims (4)

An applicator having a writing part at the tip of the shaft main body, and a cap covering the writing part being detachably inserted, wherein the cross-sectional shape of the shaft main body is formed in a circular shape, The vicinity of the insertion end with respect to the shaft main body is substantially the same as the cross-sectional shape of the shaft main body, and the other end is substantially rectangular, and the inscribed circle diameter of the square portion is the circumscribed circle diameter near the insertion portion. An applicator characterized by having the same diameter. The applicator according to claim 1, wherein a flat portion is formed on the surface of the cap so as to extend from the insertion portion of the cap to a quadrangular portion. The applicator according to claim 1 or 2, wherein a corner portion of the quadrangular portion is formed to be curved. The applicator according to any one of claims 1 to 3, wherein the cap is detachable from a rear portion of the shaft main body.

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