JPH0618614Y2 - Application destination of applicator with valve - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to the application destination of a valve-applied applicator containing a coating fluid such as a correction fluid, paint, cosmetics, ink, etc., and particularly performs linear coating. The present invention relates to an application destination of a valved applicator having a thin tip portion which is suitable for.

(Prior Art) Conventionally, as shown in FIG. 5, a main body 1 having a coating liquid chamber 2 therein, a coating body 3 fixed to a tip portion of the main body, and a coating portion 4b are provided at the tip of the coating body 3. There is known a valved applicator which comprises a valve body 4 protruding from the hole 3b and biased forward so as to press the valve portion 4a against the seat 3a behind the tip hole 3b of the applicator body 3.

The valved applicator has a structure that passes through a gap between the seat portion and the valve portion, which is formed when the valve body is pushed backward, and the coating liquid flows out from the gap between the tip hole of the applicator body and the coating portion. Therefore, it has a feature that a relatively narrow coating trace can be obtained,
In addition to the demand for fine coating marks in the market, there is a further demand for a valved applicator capable of obtaining extremely fine coating marks.

However, in order to make the coating trace thin, it is necessary to make the tip of the applicator thin and to make the tip hole of the applicator small, so that the seat portion and the valve portion also have to be formed small. As a result, extremely high accuracy is required during processing and assembly, and in the conventional structure that prevents the coating liquid from flowing out by making surface contact between the seat and the valve, the center line of the seat and the valve is Even a slight misalignment causes insufficient sealing between the seat portion and the valve portion, making it difficult to prevent the coating liquid from flowing out.

Therefore, in order to eliminate such a problem, the seat portion and the valve portion are brought into circumferential contact with each other by making the inclination angle of the seat portion larger than the inclination angle of the valve portion or forming the seat portion in a step shape. Things have been done. (Refer to FIG. 3 and FIG. 4, the circumferential line contact portion is shown by a chain line) (Problem to be solved by the invention) However, in the above-mentioned configuration, the circumferential line contact position between the seat portion and the valve portion Since it is the rear end of the tip hole, if there is a slight misalignment between the center of the tip hole and the center of the seat, the rear end shape of the tip hole becomes an ellipse that intersects the axis at an angle. As a result, the rear end of the front end hole and the valve portion come into point contact with each other at one or several points, resulting in a new problem of insufficient sealing.

(Means for Solving the Problems) The present invention has been made in view of the above-mentioned object, and an application body having a seat portion formed at the rear of the rear end of the tip hole and a valve portion are pressed against the seat portion. An application destination of a valve-applied applicator consisting of a valve element biased forward, and one of the longitudinal cross-section ridges of the seat portion or the valve portion is a curve, and the other is a tangent to the curve or the above. A valved applicator, which is a curve having a radius different from that of the curve, wherein the seat portion and the valve portion are in circumferential line contact, and the line contact position is behind the rear end of the tip hole. The main point is the application destination.

(Operation) The application destination of the valve-applied applicator of the present invention is such that one of the longitudinal ridges of the seat portion or the valve portion is a curve, and the other is a tangent to the curve or a curve having a radius different from the curve. Because I did
Even if there is a slight misalignment between the center of the tip hole and the center of the seat, the seat and the valve can make circumferential contact, so that a complete seal can be achieved.

(Example) Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a first embodiment of the present invention, in which 4 is a valve body having a valve portion 4a having a flat surface, that is, a straight ridge line, formed on the front side. (Not shown), the flat valve portion 4a is urged forward, and the convex curved surface formed on the rear side of the tip end hole 3b of the applicator body 3, that is, the ridge line is pressed against the arcuate seat portion 3a, and further toward the valve portion 4a front side. The formed coating portion 4b is arranged so as to protrude from the tip end hole 3b of the coating body 3.

In this case, since the circumferential line contact position between the seat portion 3a and the valve portion 4a is located rearward of the rear end of the tip hole 3b (the circumferential line contact position is indicated by a chain line), the center of the tip hole 3b and the seat portion Even if there is a slight deviation from the center of 3a and the rear end of the tip hole 3b becomes an elliptical shape that obliquely intersects the axis, the seat portion 3a and the valve portion 4a can make circumferential line contact, so that a hermetic seal is achieved. It can be completely achieved.

FIG. 2 shows a second embodiment of the present invention, in which a valve element 41 having a convex curved surface, that is, a valve portion 41a having a ridge arc is formed on the front side.
Is the tip hole 6 of the tube body 61 fixed to the tip of the applicator 31.
1b A seat portion 61a having a straight surface formed on the rear side, that is, a ridge line
The pressure applied to the coating portion 4 and the coating portion 4 formed on the front side of the valve portion 41a.
1b is the same as that of the first embodiment except that it is arranged so as to project from the tip end hole 61b of the tubular body 61.

In this case, the contact point between the seat portion 61a and the valve portion 41a on the circumference line is located rearward of the rear end of the tip hole 61b (the contact point on the circumference line is indicated by a dot-dash line). Even if there is a slight deviation from the center of 61a and the rear end of the front end hole 61b becomes an elliptical shape that obliquely intersects the shaft center, the seat portion 61a
Since the valve portion 41a and the valve portion 41a can come into circumferential contact with each other, a complete seal can be achieved, and by forming the tube body 61 of metal, it is possible to obtain a finer coating trace than that of the first embodiment. In addition, in the above embodiment, the seat portion and the valve portion are shown by the ridge line being a straight line or a circular arc having a convex curved surface. Since the feature is that it is behind the end, the ridgelines of the seat portion and the valve portion may be a combination of a concave curved arc and a convex curved arc (however, the radius of the concave curved arc is Smaller than the radius of the arc). Further, here, the ridge line indicates the shape of the ridge line as a whole, and for example, when the seat portion and the valve portion are formed by a machining method or the like, a fine grind by cutting or the like, It does not show wavy undulations.

(Effects of the Invention) Since the valve-applied applicator according to the present invention has the above-mentioned configuration, the seat portion and the valve portion are in circumferential line contact, and the circumferential line contact position is after the application body tip hole. Since it is behind the end, even if there is a slight deviation between the center of the tip hole of the application body and the center of the seat, and the rear end of the tip hole becomes an ellipse that intersects the axis at an angle, Since it can be in circumferential line contact with the part, it is an excellent one as a valved applicator having a thin tip of the apex, which can achieve complete sealing and is particularly suitable for applying thin linear coating. .

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a vertical sectional view of the first embodiment, FIG. 2 is a vertical sectional view of the second embodiment,
3 and 4 are vertical sectional views of a conventional example, and FIG. 5 is a vertical sectional view of a valved applicator. 1 ... Main body, 3, 31 ... Application body, 3a, 61a ... Seat portion,
4, 41 ... Valve body, 4a, 41a ... Seat portion, 61 ... Tube body, 3
b, 61b ... Tip hole

Claims (1)

[Scope of utility model registration request] 1. An application destination of an applicator with a valve, which comprises an applicator having a seat portion formed at the rear of the rear end of the tip hole, and a valve body biased forward so as to press the valve part against the seat. The seat section or the valve section has a longitudinal cross-section ridge line, one of which is a curve, and the other is a tangent line of the curve or a curve having a radius different from the curve, and the seat section and the valve section are circumferential. An application destination of an applicator with a valve, which is in line contact, and the line contact position is behind the rear end of the tip hole.