JP2004299306A - Coater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pressurizing type coater, which suppresses the development of overpressurized state within a tank as much as possible, can properly deal with a subtle pressure change and has a valve excellent in strength and durability. <P>SOLUTION: In the coater, in which a valve mechanism is arranged between a discharging liquid housed in the tank and a pressurizing operation means for pressurizing the liquid, the slit-like through hole, through which compressed air moves in and out, of an elastic valve is arranged aslant. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a makeup liquid such as an eyeliner or a manicure, a writing tool such as a ball-point pen, a correction tool containing a correction liquid, a discharge liquid stored in a tank, and pressurizing operation means capable of pressurizing the liquid. The present invention relates to an applicator having a valve mechanism disposed between the applicators.
[0002]
[Prior art]
As a means for pressurizing a liquid contained in a tank, there is known a means having a cylinder chamber in which a piston is slidably disposed and for sending compressed air into the tank. In order to maintain the compressed air sent into this tank at a certain pressure, assuming that a valve mechanism is arranged between the liquid and the pressurizing operation means, a spherical valve body urged backward by a coil spring is used. One (see Patent Document 1), one with an O-ring-shaped elastic material interposed (see Patent Document 2), and the like.
[0003]
[Patent Document 1]
JP-A-10-28921 (page 3, left column, line 8 to item 3, right column, line 11)
[Patent Document 2]
JP 2000-279871 A (page 2, right column, lines 20 to 36)
[0004]
[Problems to be solved by the invention]
The above-described prior art has an advantage that the liquid can be applied even when the applicator is turned upward because the liquid agent is pressurized. However, it is difficult to determine the degree of pressurization.For example, when knocking is repeatedly performed, the pressure of the liquid agent storage unit is excessively increased, and a large amount of liquid agent is discharged during writing, and the paper surface is stained, or Although it is sealed by the valve body, the liquid agent gradually discharges from the gap between the ball and the tip on the tip end side when writing is not performed, and as a result, clothes, a pen case, or a cap is attached. In some cases, the inner surface of the cap was stained. A valve that uses the elasticity of an elastic material can open the through hole for a certain amount of bidirectional pressure, allowing compressed air to escape on its own in the event of overpressurization. It is possible to alleviate the over-pressurized state, but adjusting only the elasticity or the thickness of the member due to the physical characteristics of the elastic material results in a valve that opens with only a weak force. It was difficult to control such as maintaining the state to some extent and opening it with a small amount of pressure against subtle changes in pressure. In addition, there is a concern that the strength and durability of the valve may be adversely affected.
[0005]
An object of the present invention is to provide an applicator in which the pressure in an application liquid tank can be appropriately adjusted and the ejection of the application liquid is stable.
[0006]
[Means for Solving the Problems]
That is, the present invention relates to an applicator in which a valve mechanism is arranged between a discharge liquid stored in a tank and pressurizing operation means capable of pressurizing the liquid, wherein the valve mechanism has a slit shape. The elastic valve body made of a rubber-like elastic body having a passage formed therein is divided through the slit-shaped passage of the elastic valve body by a surface orthogonal to the opening edge of the slit-shaped passage when the slit-shaped passage is closed. The gist is an applicator in which the two sections have different cross-sectional areas.
[0007]
[Action]
A portion of the elastic valve body that opens when receiving a pressure and closes when the pressure is released forms a portion in which the left and right portions operate asymmetrically via a slit-shaped passage that is an air passage. In other words, the inner wall portions of the opposed slit-shaped passages that come into contact with each other in the closed state of the slit-shaped passage slightly differ in the time required to reach the scheduled point of contact with each other, so that the inside of the tank containing the liquid is more than necessary. When an over-pressurized state is reached, surplus air can be released quickly.
[0008]
【Example】
Hereinafter, an example will be described with reference to the drawings.
The one shown in FIG. 1 assumes a correction tool containing a correction liquid as a content liquid. A correction liquid 2 is stored in a free state in a main body 1 serving as an ink tank, and a ball holder 4 in which a ball 3 is rotatably held is connected to a tip of the main body 1. The ball 3 is illegitimated forward by a coil spring, and functions as a valve for controlling the discharge of liquid by abutting the inner edge of the ball holder 4 in a liquid-tight manner. The correction liquid in the main body 1 has water as a main medium and a white pigment such as titanium oxide dispersed therein. The correction liquid is in contact with the rear end interface of the aqueous correction liquid 2 and mainly contains an organic medium such as polybutene. An anti-reflux body composition 5, which is a high-viscosity fluid composition, is provided. Since the backflow preventing composition 5 has a high viscosity, it can regulate the movement of the correction fluid 2 when the correction fluid 2 tries to move backward, and plays a role of preventing the correction fluid 2 from flowing backward. It also plays a role in suppressing volatilization. The backflow preventer composition 5 moves as the correction fluid 2 is consumed and the interface of the correction fluid moves forward. Reference numeral 6 denotes a bottomed cylindrical float of a synthetic resin injection-molded article immersed in the backflow preventive composition 5, which is located on the inner wall of the main body 1 as a portion where the backflow preventive composition 5 exists. The gap is minimized to help maximize the backflow prevention function, and advances together with the backflow inhibitor composition 5 as the ink is consumed. In addition, even if the backflow preventing body composition 5 moves backward, it blocks the path leading to the outside world so as not to leak as much as possible.
[0009]
An operation crown 7 is attached to the rear end of the main body 1 so as to be able to move forward and backward. The correction fluid 2 can be pressed from behind. The operation crown 6 is urged rearward by a coil spring 9, and returns the operation crown 7 to the original non-operation state when the forward movement operation by a hand or the like is released. At this time, the O-ring 8 reaches the groove 10 formed on the inner wall at the rear end of the main body 1 and communicates with the outside. The space behind the backflow preventing body composition 5 can flow through the groove 10 and the pressurized state is released. Have been like to be.
[0010]
An elastic valve element 11 is arranged and fixed between the backflow prevention composition 5 (and the float 6) and the operation crown 7. The elastic valve body 11 has a slit-shaped through-hole 11c which is closed to a state where no pressure is applied and up to a specific pressure, so that the correction fluid is stored more than the elastic valve body 11 in the main body 1. The pressure in the room on the side where the correction liquid is discharged is maintained for a certain period of time such as until the correction liquid is discharged. In the case of normal use, when it is desired to discharge the correction fluid, the operating crown 7 is operated to send the compressed air to the room of the main body 1 on the side of the elastic valve element 11 where the correction fluid is stored. Immediately thereafter, the ball 3 is pressed against a surface to be coated such as a sheet of paper and the ball 3 is moved backward to discharge the liquid. It is sufficient for the elastic valve body 11 to maintain the pressing force against the correction fluid for the time up to now. The maintenance of the pressurized state after the required amount of liquid is discharged should be suppressed as much as possible because there is a possibility of liquid leakage and clogging of liquid solids at the ballpoint pen tip.
[0011]
FIG. 2 is a partially cutaway perspective view showing parts of the elastic valve body 11. The elastic valve body 11 made of silicone rubber has a bottomed cylindrical shape that is convex on the liquid side with respect to the fixing portion 11a for the main body 1, and has a slit-shaped through hole 11c in the disk-shaped portion 11b corresponding to the bottom. are doing. The disk-shaped portion 11 has a substantially rectangular shape having a curved shape in which opposing short pieces bulge outward, has a small area with respect to the region of the fixed portion 11a, and has a ridge line connecting the two. It is inclined in the direction to reduce the diameter toward the liquid side. This is because the through hole 11c is easily opened positively with pressure from the operation crown 7 side, and the through hole 11c is relatively hard to open with pressure from the liquid side.
[0012]
As shown in FIG. 3A, which is a view as seen from the liquid side (from the arrow I side in FIG. 2), the through hole 11c is formed in a single character shape in a direction inclined with respect to the long side of the board-shaped portion 11b. I have. When cut at a position shifted from the center of the through hole 11c (also the center of the elastic valve element 11 in this example) and perpendicular to the slit direction of the through hole 11c (II-II 'line direction). This is because, as shown in FIG. 3B, which is a cross-sectional view of FIG. That is, when the through hole 11c is opened under pressure, the opening and closing are not performed by a mirror image operation with the straight line in the direction in which the slit rides as a symmetric axis, but the volume of the member is a straight line in the direction in which the slit rides. The timing of closing / opening can be delicately shifted by shifting the movement of the portion facing the through hole 11c so as to have a bias with respect to the boundary, and an over-pressurized state is unlikely to be formed.
[0013]
FIG. 4 shows another example. This is an example of the case where the disk-shaped portion 11b does not have a long side and has a circular shape. As shown in FIG. 4A in a direction imagined in FIG. 3A, the slit-shaped through hole 11c is formed at a position shifted from the center of the circle of the board-shaped portion 11b. As shown in FIG. 4B in the expected direction, since the cross-sectional area is uneven, the same effect as in the above-described example can be expected.
[0014]
FIG. 5 shows still another example. As an example in which the board-shaped portion 11b does not have a long side as in the example of FIG. 4, it is an example in which the board-shaped portion 11b has a circular shape, but an example in which the through hole 11c passes through the center of the circle. is there. As shown in FIG. 5B, a similar effect is obtained by forming a portion having a different thickness in a portion facing the slit.
[0015]
【The invention's effect】
As described above, the applicator of the present invention minimizes the holding of an unnecessarily large pressure when performing a pressurizing operation for discharging the content liquid, and also suppresses this against fine pressure. An appropriate opening that is appropriate can be performed. In addition, since it does not rely on the adjustment of the material and the thickness, it may have excellent strength and durability.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing an example of a main part.
FIG. 2 is a partially cutaway perspective view showing members.
FIG. 3A is an external view showing another example of a member.
(B) Sectional drawing which shows another example of a member.
FIG. 4A is an external view showing another example of a member.
(B) Sectional drawing which shows another example of a member.
FIG. 5A is an external view illustrating another example of a member.
(B) Sectional drawing which shows another example of a member.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main body 2 Correction liquid 3 Ball 4 Ball holder 5 Backflow prevention body composition 6 Float 7 Operation crown 8 O-ring 9 Coil spring 10 Groove 11 Elastic valve body 11a Fixed part 11b Board-shaped part 11c Through hole

Claims (4)

In an applicator having a valve mechanism disposed between a discharge liquid contained in a tank and pressurizing operation means capable of pressurizing the liquid, the valve mechanism may have a rubber-like shape having a slit-like passage. In addition to the elastic valve body made of an elastic body, in a state where the slit-shaped passage is closed, two surfaces divided through the slit-shaped passage of the elastic valve body by a surface perpendicular to the opening edge of the slit-shaped passage. An applicator having portions with different areas. The length along the shape of the elastic valve body from any point on the opening edge of the slit-shaped passage to the portion where the elastic valve body is fixed in the vertical direction is different from the length on the opposite side through the slit-shaped passage. The applicator according to claim 1, 3. The coating according to claim 1, wherein an opening edge of the slit-shaped passage is formed in a board-shaped flat portion, and is formed at a position that is not parallel to an outline of the board-shaped flat portion. 4. Utensils. The applicator according to any one of claims 1 to 3, wherein portions of the elastic valve body facing each other across the slit-shaped passage are different in thickness.

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