JP2000127685A - Tip for applicator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tip for an applicator capable of obtaining the emission of a coating soln. stable with the elapse of time by preventing the damge of a pen point and capable of obtaining the good emitting feeling of the coating soln. SOLUTION: In a tip for an applicator constituted so that a ball seat for placing a ball is formed to the ball holding chamber provided to the leading end of a tip and the ball is held in a freely rotatable manner by caulking the leading end edge of the tip is caulked inwardly by first caulking processing and second caulking processing in such a state that a part of the ball is protruded from the leading end of the tip by pressing the rear surface of the ball to the inner wall surface of the leading end edge of the tip directly or through a pressing element by a coil spring, a first caulking angle is set to 60-100 deg. and a second caulking angle is made larger than the first caulking angle and the protruding length J of the ball protruded from the leading end of the tip in such a state that the ball is placed on the ball seat is set to 20-30% of a ball diameter A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tip for an applicator for applying a correction liquid or a coating liquid such as a cosmetic paint.

[0002]

2. Description of the Related Art Conventionally, a ball holding chamber at the tip of a tip has
A ball seat for mounting the ball is formed, and the back surface of the ball is pressed against the inner wall surface of the tip end edge directly by a coil spring or via a pressing element, and a part of the ball faces the tip end. There is known a tip for an applicator in which a ball is rotatably held by caulking a tip end edge inward in a protruded state.

[0003]

However, in the above-mentioned applicator tip, the tip of the tip easily hits the surface to be applied at the time of application, and it is difficult to obtain a smooth application liquid ejection. Similarly, when the tip of the tip hits the surface to be coated, the tip of the tip is easily damaged, and there is a problem that it is difficult to obtain a stable application liquid discharge with time.

[0004] In view of the above problems, the present invention provides a tip for an applicator capable of obtaining a smooth and stable coating liquid discharge with time by preventing the pen tip from being damaged by the tip of the tip hitting the surface to be coated. To provide.

[0005]

In order to achieve the above object, according to the present invention, a ball seat for mounting a ball in a ball holding chamber at a tip end of a chip is formed, and a back surface of the ball is coiled. The tip end edge is pressed by the spring directly or via the pressing element against the inner wall surface of the tip end edge, and the tip end edge is first swaged and second swaged with a part of the ball protruding from the tip end. By crimping inward, the tip for the applicator holding the ball rotatably has a first swaging angle of 60 to 100 ° and a second swaging angle larger than the first swaging angle. ,
Let the ball coming out from the tip of the chip with the ball placed on the ball seat be 20 to 30% of the ball diameter.

In addition, the ball coming out from the tip end in a state where the ball separates from the ball seat and is urged to the tip end edge is changed from the ball coming out from the tip end mounted on the ball seat. Is set to be 5 to 15% larger than the ball diameter.

Further, the thickness of the tip end edge before the first swaging is set to 0.05 to 0.15 mm.

Examples of the material of the tip for the applicator include metals such as stainless steel, nickel silver, brass and aluminum; synthetic resins having excellent wear resistance such as polyacetal, polybutylene terephthalate, polycarbonate and polyethylene terephthalate; and ceramics. And the like.

Examples of the material of the ball include a tungsten carbide superhard material, a ceramic material such as silica, alumina, zirconia, and silicon carbide.

The liquid used in the present invention includes:
General liquids used for applicators such as correction fluids, glues, and cosmetics can be appropriately selected.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present embodiment will be described with reference to FIGS. 2 to 6. First, an applicator tip 1 is conventionally known on the bottom wall of a ball holding chamber 4 of a tip body 2. FIG. And a radial groove 6 extending radially from the coating liquid flow hole 5. Then, the ball 3 is inserted into the ball holding chamber 4, and the tip 8 of the chip is swaged by the first caulking. By caulking inward by the second caulking process, the ball 3 is manufactured by rotatably holding a part of the ball 3 in a state of projecting outward from the tip end 8 of the ball.

Further, as shown in FIG. 5, if only the first caulking is performed, the corner portion L hits the surface to be coated due to the angle at the time of coating or the like. Therefore, the second swaging angle 2θ is changed to the first swaging angle 1θ.
By forming it larger, the corner portion L generated by the first caulking is plastically deformed, so that even when the tip of the chip hits the surface to be coated or the like, a smooth application liquid discharge can be obtained.

Further, if the first swaging angle is smaller than 60 °, the tip end 8 of the chip will hit the surface to be coated only by slightly tilting the coating angle during coating, so that it is difficult to obtain a smooth coating liquid discharge. If it is larger than 100 °, the plastic deformation of the tip of the chip is large, so that the ball holding force is weak, and the impact resistance is reduced.

As shown in FIG. 2, the first swaging angle 1θ is 6
0 to 100 ° and the second swaging angle 2θ are the first swaging angle 1
θ and the ball 3 is
Is set to 20% to 30% of the ball diameter A from the tip of the chip placed on the ball. According to the examination results, when the ball protrusion J is less than 20% of the ball diameter, the tip end 8 easily hits the application surface during application, and the tip end 8 is easily damaged. If it is larger than 30%, the ball holding power becomes weak, and the impact resistance such as dropping falls.

The ball 3 is inserted so as to be movable in the axial direction in order to secure a discharge amount of the coating liquid. Therefore, when the ball is urged against the inner wall surface of the tip end edge, the ball exit K coming out from the tip end is larger than the ball exit J coming out from the tip end placed on the ball seat. Set 5 to 15% larger. If it is less than 5%, the amount of ball movement is small, so that the amount of the coating liquid ejected is small. I do.

[0016] Impact resistance and good application liquid discharge are also affected by the thickness of the tip of the chip before swaging. A thinner tip end edge is less likely to contact the surface to be coated, so that a smooth application liquid discharge can be obtained, but the impact resistance is weakened. Similarly, when the thickness of the tip edge becomes thicker,
Although the tip edge holding the ball is thick, it has high impact resistance, but it is difficult to obtain a smooth coating liquid discharge because it easily contacts the surface to be coated. According to the examination result, as shown in FIG.
The thickness B of the tip end edge before swaging is 0.05 mm or more.
It was found to be 0.15 mm. If it is less than 0.5 mm, the impact resistance is significantly reduced, which is not preferable. On the other hand, if it is larger than 0.15 mm, even if the tip of the chip is slightly tilted, it hits the surface to be coated, so that a smooth discharge of the coating liquid cannot be obtained.

According to the present invention, the ball may be pressed against the inner wall of the tip end edge directly by a coil spring or via a pressing element to provide a pen tip having a valve mechanism.
The structure may not be pressed.

[0018]

This embodiment will be described with reference to the drawings. The same members and the same portions are indicated by the same reference numerals.

The tip 1 for an applicator of the present embodiment shown in FIG. 1 is made of a tungsten carbide-based hard material having a ball diameter A of 0.5 mm by cutting a tip member 2 made of stainless steel. In order to be able to hold the ball 3, a ball holding chamber 4 is formed, and a coating liquid passage hole 5 is formed at the center of the bottom wall of the ball holding chamber 4 and extends radially from the coating liquid flow hole 5. The radial groove 6 is provided. Then, the ball 3 is inserted into the ball holding chamber 4 and is brought into contact with the bottom wall, and the ball 3 is hammered to make the contacted portion into a ball shape, and receives the writing pressure applied to the ball 3 at the time of application. And a ball seat 7 for smooth rotation of the ball 3 is formed. Next, when the thickness B is 0.1
In the state where the ball 3 is seated on the ball seat 7 with the tip end 8 of 20 mm and 20% (0.1 mm) of the diameter of the ball 3 is projected outward from the tip end 8, the first By caulking 80 ° inside by caulking, and then caulking in 140 ° inside, which is 60 ° larger than the first caulking angle, by second caulking, it was held rotatably.

The tip member 2 is fitted into an engagement hole 11 formed at the tip of the neck member 10. The engagement hole 11 communicates with a coating liquid flow passage 12 for drawing out the coating liquid.
A holding portion 14 of a stepped coil spring 13 formed by connecting the engagement hole 11 and the coating liquid flow path 12 is provided. The coil spring 13 is held by abutting the rear end 13 a of the holding portion 14. , And are loaded in the chip member 2 by being urged forward. The ball 3 is always in contact with the inner wall surface 8a of the tip 8 by the coil spring 13. At this time, the ball coming out from the tip end 8 of the ball K
The ball 3 is 14% larger than the ball diameter A and 35% of the ball diameter (0.
17 mm).

At the rear end of the neck member 10, a flexible coating liquid container 15 filled with the correction liquid 9 is disposed.
A stirring ball 17 for stirring the correction liquid 9 was inserted into 5. Further, a cap 16 for covering the tip member 2 was provided from the tip end 8 side, and a correction pen 18 was formed.

Hereinafter, the first swaging angle 1θ and the second swaging angle 2
θ was changed as shown in Table 1, and the same procedure as in Example 1 was carried out. Examples that correspond to the dimensional relationship of the present invention are given as examples, and those that are not are given comparative numbers as comparative examples.

Further, the first swaging angle 1θ is set to 80 °, the second swaging angle 2θ is set to 140 °, and the ball protrusion J while sitting on the chip is changed as shown in Table 2. Created. Examples that correspond to the dimensional relationship of the present invention are given as examples, and those that are not are given comparative numbers as comparative examples.

Tests and Evaluations Handwriting after application of the correction pen and application after dropping in Examples 1 to 3 and Comparative Examples 1 to 5 were evaluated by performing the following tests.

For the first test method and evaluation method,
The procedure was as follows. Featured clip (CP-20
2H; made by Plus Co., Ltd.), pressurizing the coating liquid container, writing angle 80 °, ball diameter φ0.5 mm, ball out at coating 0.1 mm (20% of ball diameter) The ball is projected 0.16 mm (12% play in the axial direction) when the ball is biased forward, and a straight line with a thickness of 0.1 mm at the front end of the caulking is actually applied on the application paper, and the handwriting after application is visually observed. Decided.

The evaluation results of each of the examples and comparative examples in the first test method are as shown in Tables 1 and 2.
Is smooth to the end of use, o is partially uneven from the middle, Δ is partially uneven from the beginning, x is transparent through the middle of the handwriting from the beginning.

Regarding the second test method and evaluation method,
The procedure was as follows. The tip of the chip is dropped so as to collide with the floor from a height of 70 cm. afterwards,
The coating solution container is pressurized by being sandwiched between eyeball clips (CP-202H; manufactured by Plus Co., Ltd.), the writing angle is 80 °, the ball diameter is φ0.5 mm, and the ball comes out at the time of coating is 0.1 mm (ball 20% of diameter), ball protrudes 0.16mm (axial direction play 12%) when biased forward, 0.1mm thick at the front end of caulking, and a straight line is actually applied on the application paper. Was visually evaluated for impact resistance.

The evaluation results of each of the examples and comparative examples in the second test method are as shown in Tables 1 and 2.
Indicates that the coating can be performed with five or more drops, and X indicates that the coating cannot be performed with less than five drops.

[0029]

[Table 1]

[0030]

[Table 2]

[0031]

Since the tip for a coating tool of the present invention has the above-described structure, it is possible to prevent the pen tip from being damaged by the tip of the tip hitting the surface to be coated, thereby obtaining a smooth and stable coating liquid discharge with time. Can be provided.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view showing a main part of a correction pen using a tip for an applicator of the present invention.

FIG. 2 is an enlarged vertical sectional view showing a main part of the applicator tip in a state where a ball is seated on a ball seat in FIG. 1, from which a coil spring is omitted.

FIG. 3 is an enlarged vertical sectional view of a main part in which a coil spring is omitted, showing a tip for an applicator in a state where a ball is seated on a ball seat in FIG. 1;

FIG. 4 is an enlarged vertical sectional view of a main part in which a coil spring is omitted, showing the applicator tip in a state where the ball is urged to the tip end edge in FIG.

FIG. 5 is an enlarged vertical cross-sectional view of a main part of a tip for an applicator in a state where a first caulking process has been performed, in which a coil spring is omitted.

FIG. 6 is an enlarged vertical cross-sectional view of a main part of a tip for an applicator before first swaging, in which a coil spring is omitted.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 tip for applicator 2 tip member 2 a coating liquid reservoir 3 ball 4 ball holding chamber 5 coating liquid circulation hole 6 radial groove 7 ball seat 8 tip end A ball diameter J, K ball output 1θ first swaging angle 2θ second Swaging angle

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2C350 HA09 HA10 HA11 HA12 NC02 NC11 NC14 NC20 NE01 4F042 FA27 FA30

Claims (3)

[Claims] A ball seat for mounting a ball in a ball holding chamber at a tip end of a chip is formed, and a back surface of the ball is formed inside a tip end edge of the tip directly by a coil spring or via a pressing element. The ball is pressed against the wall surface, and the tip end edge is swaged inward by the first swaging and the second swaging in a state where a part of the ball is projected from the tip end, so that the ball is rotatably held. In the chip for the applicator to be held, the first swaging angle is set to 60 to 100 °, the second swaging angle is formed to be larger than the first swaging angle, and the ball is placed on the ball seat from the tip end. A tip for an applicator, wherein a projected ball projection is 20 to 30% of a ball diameter. 2. A ball coming out of the tip end of the ball with the ball separated from the ball seat and being urged against the inner wall surface of the tip end edge comes out of the tip end of the chip mounted on the ball seat. The tip for an applicator according to claim 1, wherein the ball diameter is set to be 5 to 15% larger than the ball diameter. 3. The thickness of the tip end edge before the first processing is set to 0.0
3. The tip for an applicator according to claim 1, wherein the tip is formed to have a diameter of 5 to 0.15 mm.