JP2001080277A - Applicator, and its application liquid feeding valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an application liquid from dropping down, and improve the operate-using feeling by forming the valve disc of an application liquid feeding valve, which is arranged in front of an application liquid tank and feeds and stops the application liquid accompanying the longitudinal movement of a tip, of an elastic member, and elastically deforming and compressing the valve disk accompanying a retraction of the tip. SOLUTION: When a fiber bundle tip pen 1 as an applicator is used, a tip 5 is pushed in by a writing pressure, and the valve disk 12 of an application liquid feeding valve 6 elastically deforms. Therefore, the front opening 14a of a valve seat 14 is opened, and an ink is fed from an ink tank 3 to the tip 5 through a valve chest 11. Then, when the tip 5 retracts by a set value or higher, and a pressure at the set value or higher is applied to the valve disc 12, the valve disc 12 elastically deforms again, and the valve seat 14 is closed. Therefore, the feeding of the ink into the valve chest 11 is stopped. By this constitution, the dropping down or the like of the ink when the writing is continued can be eliminated. At the same time, stiffness or the like in the writing feeling at the start of the writing can be eliminated, and the operability of the fiber bundle tip pen 1 can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an applicator which can be used as a writing instrument or a cosmetic tool, and a coating liquid supply valve used for the applicator.

[0002]

2. Description of the Related Art The present applicant has developed various types of writing implements in which ink in a tank is supplied to a chip by pushing the chip, and writing can be performed. For example, Japanese Patent Application Laid-Open No. 9-323495 proposes a free ink type writing implement having an improved structure capable of supplying ink smoothly and having continuous writing.

[0003] This conventional applicator has a cylindrical ink tank containing ink, a chip that oozes out the ink by capillary action and the like, and a valve that supplies and stops the ink to the chip. In this applicator, when the valve is opened, the ink in the ink tank is guided to the tip and written, and the valve has a spherical valve element that moves back and forth in a valve chamber having an opening at the tip. The valve body is pressed to the opening side by an urging member, and the tip is provided on the tip side of the valve, and the rear end side of the tip is in contact with a ball in the valve.

[0004] When the conventional applicator described above is not used,
Since the ball in the valve chamber is pressed toward the opening of the valve chamber by the biasing member, there is no ink supply. In addition, when the tip of the chip is pressed against paper or the like during writing, the ball is unintentionally pushed up by the writing pressure at the time of writing, so that the ink in the ink tank can gradually exude to the chip. Therefore, there is no ink fogging, there is no need to stop writing to supply ink to the chip, and no excessive amount of ink is supplied to the chip, and a beautiful handwriting is obtained. There is an advantage.

[0005]

However, in the above-mentioned conventional applicator, when the valve is opened by the writing pressure at the time of writing, the valve-opening state is continued and the ink may flow out excessively. If a stopper that regulates the amount of retreat of the chip is provided in order to solve such a problem, when the chip is pushed into and hits the stopper, the hit feeling of the click becomes stronger, and the discomfort at the time of writing increases.

Further, in the above-mentioned conventional applicator, an urging member for urging the valve element is required separately from the valve element, and there is a limit in cost reduction.

Accordingly, the present invention provides a novel structure of a coating liquid supply valve which does not require an urging member separate from the valve element, and is opened by writing pressure or intentional pushing of a tip during use. In addition to the proposal, by providing the supply valve having such a novel structure, even if the writing is continuously performed, the application liquid does not fluctuate, and further, the user does not feel a so-called touch at the start of the writing. It is an object of the present invention to provide a writing instrument that can be configured as described above.

[0008]

In order to achieve the above object, the present invention takes the following technical measures.

That is, the applicator of the present invention comprises a tank containing a coating solution, a tip provided in front of the tank, which can move back and forth, and a tip of the coating solution applied from the tank to the tip by the front and rear movement of the tip. A coating liquid supply valve for supplying and stopping
The valve has a valve seat having a coating liquid outflow hole that opens forward,
A valve body disposed behind the valve seat, and a seat for supporting the rear portion of the valve body so that the valve body is seated on the valve seat to close the outflow hole, and between the seat and the valve seat. Is a valve chamber, a valve body is disposed in the valve chamber, a flow passage for flowing the coating solution in the tank into the valve chamber is formed in the seat, and the valve body is located at the rear of the chip. It is made of a material that can be elastically deformed so as to be compressed in the front-rear direction by receiving a pressing force due to the movement of. Note that the applicator includes a writing implement and a makeup implement. The coating liquid may be water-based or oil-based, and an appropriate liquid such as ink, mascara, nail polish, or the like may be used. The tank is preferably cylindrical, and when storing ink in a cylindrical tank (ink storage cylinder) having an open rear end, it is preferable to provide a backflow preventing agent at the rear end of the ink. The tip is preferably made of a fiber bundle material from which a coating liquid such as felt can ooze out by capillary action, and the rear end of the tip or the rear end of a member linked to the tip can be brought into contact with the tip of the valve body. Further, the distal end side in the valve chamber has a funnel shape with a convergent shape, and the diameter of the distal end opening can be made slightly smaller than the diameter of the spherical valve body. By adopting a double wall structure in which the tank is disposed in the outer main body, it is possible to replace only the tank or to improve the degree of freedom in the material and strength of the tank.

In the applicator of the present invention, when not in use, the valve body in the valve chamber normally closes the opening of the valve chamber.
Therefore, when not in use, the ink tank is sealed by the valve and there is no ink supply. When the tip of the chip is pressed against paper or the like at the time of writing, the rear end of the chip slightly pushes up the valve body, opening the opening of the valve chamber, and the coating liquid in the valve chamber is supplied to the chip. Further, the valve body is formed of a material that can be elastically deformed, and the valve body is elastically deformed before the movement of the tip on the rear side is restricted, so that the so-called hit feeling is reduced.

It is preferable that the valve body has a spherical shape. Further, when the valve body receives a pressing force equal to or more than a predetermined value, the valve body can close the flow passage of the receiving seat. According to this, when a large writing pressure acts on the tip, the supply of the coating liquid can be stopped by closing the flow passage, and ink fogging is prevented. Further, depending on the setting of the pressing force for closing the flow passage, the flow passage can be closed when the normal writing pressure is applied. According to this, the valve body can also be operated as a check valve. For example, it is possible to prevent the backflow of the ink at the time of upward writing.

Further, the valve body is formed in a spherical shape,
The valve chamber is constituted by a cylindrical space, and when the valve body receives a pressing force of a predetermined value or more, the equator portion of the valve body and the inner surface of the peripheral wall of the valve chamber can be in contact with the entire circumference. According to this, when the spherical valve body is compressed in the axial direction,
The valve body swells in a direction orthogonal to the axial direction, and its equatorial portion is pressed against the inner surface of the peripheral wall of the valve chamber to be sealed. Therefore, when a large writing pressure acts on the chip, the supply of the ink is cut off and the fogging is prevented. Also in this case, the valve body can be made to function as a check valve.

The coating liquid supply valve of the coating device supplies the coating liquid contained in the tank to the chip by retreating the chip, and a valve body is disposed in a valve chamber having a coating liquid outflow hole. The valve body has a seat for supporting the valve body so as to close the outflow hole, and the seat has a flow passage through which the coating liquid flows in the valve chamber, and the valve body is made of silicon. It is formed of an elastically deformable material such as rubber, and the valve body which has been pressed by the retraction of the chip is elastically deformed so as to be compressed in the front-rear direction to open the coating liquid outflow hole. It is a feature.

In the coating liquid supply valve of the present invention, the valve body is preferably spherical. When the valve body receives a pressing force equal to or more than a predetermined value, the valve body can close the flow passage of the seat. Further, the valve chamber is constituted by a cylindrical space, and when the valve body receives a pressing force of a predetermined value or more, the equatorial portion of the valve body and the inner surface of the peripheral wall of the valve chamber may be in contact with the entire circumference. it can.

[0015]

Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 illustrates a fiber bundle tip pen using water-based ink as a first embodiment of an applicator 1 of the present invention. The applicator 1 includes a tank 3 containing a coating solution.
And a coating liquid supply valve 6 provided at the tip of the tank 3.
And a tip 5 provided on the distal end side of the valve 6. The valve 6 includes a valve seat 14 having a coating solution outlet hole 14 a opened at the tip, and a valve chamber 11 provided behind the valve seat 14.
And an elastically deformable valve body 12 disposed in the valve chamber 11.
And The valve body 12 is provided so as to close the outflow hole 14a. The rear end 5c of the tip 5 is in contact with the tip of the valve body 12 and the valve body 12 is received by the seat 9. The valve body 12 is seated on the valve seat 14 by supporting the rear portion 12 to close the outflow hole 14a. Further, the applicator 1 includes an outer cylinder 2 (outer body) serving as a pen body accommodating the tank 3 therein, a tip plug 4 attached to a tip end side of the tank 3, and attached to a rear end of the outer cylinder 2. And a backflow preventing member 8 for preventing backflow of the coating liquid.

The outer cylinder 2 is made of resin such as polypropylene,
It is a cylindrical member made of a metal such as aluminum or stainless steel, and is preferably made of a transparent or translucent hard synthetic resin. The distal end of the outer cylinder 2 is gradually made thinner.
The tip 5 is fitted into the tip holding cylinder portion 2b at the tip of the outer cylinder 2 so as to be able to slide back and forth without rattling. Note that a vertical groove 25 extending back and forth may be formed on the inner surface of the chip holding tube portion 2b.

The ink tank 3 is a cylinder made of a resin such as polypropylene or a metal such as aluminum or stainless steel, and is disposed inside the outer cylinder 2.
The ink tank 3 is hollow so that the ink can be stored therein. The outer diameter of the ink tank 3 is smaller than the inner diameter of the outer cylinder 2, so that a space is formed between the ink tank 3 and the outer cylinder 2.

A tip plug 4 is provided at the tip of the tank 3. The tip plug 4 is made of a hard synthetic resin such as polypropylene or a metal, and is disposed at an intermediate portion of the outer cylinder 2 in the axial direction. The rear end side 4a of the plug 4 is cylindrical, and the rear part 4a
A cylindrical seal member 20 is fitted around the outer periphery of the first member. The seal member 20 is interposed between the outer surface of the rear portion 4a of the tip plug 4 and the inner surface of the ink tank 3, and has a function of preventing ink leakage.

Further, in this embodiment, the sealing member 20
Is used as a constituent material of the ink. That is, in the case of a water-based ink, water vapor having a transmission coefficient of 2.5 to 10.0 cm ³ · cm / cm ² · s · Pa, more preferably 3.0 cm ³ · cm / cm ² · s · Pa or more A material having a coefficient, for example, a porous material such as silicon rubber can be used as a constituent material of the seal member 20. Silicon rubber or its copolymer has a large intermolecular chain distance, a sparse structure and a high degree of molecular flexibility, and therefore has relatively high gas permeability. Therefore, even in the case of oil-based ink, the seal member 20 can be made of silicone rubber. The water vapor (vaporized gas of the ink solvent) that has passed through the seal member 20 is dispersed in the space around the chip 5 and has an effect of preventing the evaporation of the ink solvent from the rear end face of the chip 5.

The rear part 4a of the tip plug 4 is provided with a sealing member 20.
Is fitted into the inside of the tip of the tank 3. A large-diameter portion 4b projecting outward in the radial direction is provided at a front portion of the tip plug 4, and the large-diameter portion 4b is fitted into the outer cylinder 2 and the inner peripheral surface of the outer cylinder 2. Is in contact with the step 2a provided from the rear. As shown in FIG. 2, the gas that has passed through the sealing member 20 is applied to the large diameter portion 4b.
A communication hole 10 for leading to a space around is formed. Although the shape and number of the communication holes 10 are not particularly limited, a plurality of fan-shaped holes are formed in the circumferential direction in the illustrated embodiment.

In the illustrated embodiment, the valve plug 11, the valve seat 14, and the receiving seat 9 are formed inside the plug 4 so that the plug 4 is used as a valve housing. It should be noted that a valve housing separate from the head plug 4 may be attached to the head plug 4.

That is, the ink supply valve 6 is connected to the tip opening 14a.
Is provided with a plug 4 serving as a cylindrical valve housing having an inner surface serving as a valve seat 14, and a spherical valve body 12 housed in the plug 4. In the following description of the valve structure, the plug 4 will be referred to as a housing.

The valve body 12 is formed in a spherical shape by an elastic body such as silicon rubber or other rubber, and is elastically deformable so as to be compressed in the axial direction.

The housing 4 has a cylindrical shape, and has a cylindrical valve chamber 11 in which a valve body 12 is built.
Are formed. A valve body 12 is provided on the front wall of the housing 4.
An opening 14a for exposing the chip 5 to the chip 5 side is provided, and a rear end 5c of the chip 5 is inserted into the opening 14a. The diameter of the opening 14 is 5 times the diameter of the valve body 12.
About 0 to 90% is preferable. The rear end portion 5c of the chip 5 is inserted from the opening 14a and does not directly contact the valve body 12, but the rearward movement of the chip 5 via another member is performed by the valve body 1.
2 can also be provided.

The internal structure of the housing 4 of the valve 6 will be described in more detail. As shown in FIGS. 3 and 4, a small-diameter small-diameter portion 17 protrudes radially inward at a predetermined position in the front-rear direction of the housing 4. A convex portion 15 is provided, which protrudes further in the radially inward direction from the small diameter portion 17.
A plurality of the protrusions 15 are provided in the circumferential direction.
Is provided so that its radial end comes into contact with the valve body 12. Further, a slit 16 penetrating back and forth is formed between the convex portions 15, and this slit 16
In the state where the pressing force from the chip 5 does not act on 2, it functions as a flow passage for communicating the valve chamber 11 with the tank 3.
Further, the front side surfaces of the small diameter portion 17 and the convex portion 15 may be tapered so as to be gradually inclined rearward toward the center of the shaft, but are formed in a plane perpendicular to the shaft in the illustrated example. .

The small diameter portion 17 and the convex portion 15 are
, And a valve chamber 11 is formed between the seat 9 and the front opening 14a (outflow hole). The length of the valve chamber 11 in the front-rear direction is such that the valve element 12 which does not receive the pressing force from the chip 5 abuts on both the tip of the projection 15 and the peripheral edge of the opening 14a, and the elastic restoring force of the opening 14a Are arranged at intervals so as to close off. As a result, the tip 5 is in a normal state, and the valve element 1
When no pressing force is applied to the valve 2, as shown in FIG. 3A, the valve body 12 contacts the convex portion 15 on the rear side and contacts the peripheral portion of the front opening 14 a on the front side. , From the flow passage (slit 16) of the valve seat 9 to the valve chamber 11
Although the application liquid is supplied into the inside, the front opening 14a is closed and the application liquid is not supplied to the chip 5. Also,
In a state in which the tip 5 is urged rearward by the pen pressure and moved rearward within the range of the first movement amount, the valve body 12 receiving the pressing force is deformed by this movement, and the front opening 1
4a is opened, and the coating liquid is supplied to the chip 5. Further, in this state, the ink flows out of the slit between the convex portions 15 and the side wall 1 of the valve body 12 and the valve chamber 11 is formed.
It flows between the inner surface of the chip 1b and the chip 5 from the front opening 14a. Then, the tip 5 is moved more than the second movement amount to the rear side, and the valve body 12 is further pressed and deformed, as shown in FIG.
When the valve body 12 comes into contact with not only the convex portion 15 but also the front surface of the small diameter portion 17 (the rear wall of the valve chamber 11), the supply of ink from the tank 3 is stopped, and the valve 6 is closed. Become.

The chip 5 is made of a known resin or fiber as a material, and oozes ink by capillary action or the like. The chips 5 may be all formed of a single material, or may be formed by joining a resin chip 5 and a relay member of a fiber bundle. Also, a so-called brush pen type chip 5 may be used.

The tip of the tip 5 projects forward from the tip of the outer cylinder 2 so that characters and the like can be written.
The tip 5 has a protruding portion 5c protruding from the rear end face 5d so as to contact the valve element 12 of the valve 6 described above. The rear end face 5d of the tip 5 is normally arranged with a certain gap from the front face of the tip plug 4, but comes into contact with the front face of the tip plug 4 when the tip 5 moves backward.

The gap between the tip plug 4 and the rear end face 5d of the tip 5 is such that when the tip 5 is in contact with the front face of the tip plug 4, the valve element 12 contacts the front face of the small diameter portion 17 on the rear side. The second moving amount is provided so that the supply of the ink into the chamber 11 is stopped.

The tip 5 has a small-diameter shaft portion 5 on the tip side.
And a large-diameter shaft portion 5b on the rear end side, and the protruding portion 5c protruding from a rear end surface 5d of the large-diameter shaft portion 5b. The outer diameter of the large-diameter shaft portion 5b on the rear end side of the chip 5 is smaller than the inner diameter of the outer cylinder 2, so that a space is formed between the rear end side of the chip 5 and the outer cylinder 2. It is. The space around the rear part of the tip 5 communicates with the distal end face of the seal member 20 via the valve 6 described above.

A cylindrical urethane foam 16 is built in the outer cylinder 2 behind the tip holding cylinder 2b. The urethane foam 16 acts as an ink storage section, and functions to absorb the excess ink supplied to the chip 5 and to replenish the ink from the foam 16 to the chip 5 when the ink of the chip 5 runs short. Have. Furthermore, foam 1
Numeral 6 is engaged with the step portion between the small diameter portion 5a and the large diameter portion 5b of the chip 5, and has a function to lightly urge the chip 5 rearward. The urging force of the urethane foam 16 is set to be weak, and has a function of suppressing rattling of the chip 5 while preventing the valve 6 from opening when not in use.

A coating liquid such as an aqueous ink is contained in the ink tank 3. A backflow prevention member 8 is built in the ink tank 3. The backflow prevention member 8 in the illustrated example includes a float 8a made of rubber or resin, and a backflow preventive agent 8b such as bolybdenum that covers the outer surface of the float 8a.
It is composed of The backflow prevention member 8 is located at a boundary portion on the rear end side of the ink, and the ink is applied to the backflow prevention member 8.
Is sealed so that air such as air bubbles does not enter inside. The backflow prevention member 8 is slidably inserted into the ink tank 3 so as to move toward the tip stopper 4 with consumption of ink.

A tail plug 7 is fitted to the rear end of the outer cylinder 2. The tail plug 7 has a lid 7a and a cylinder 7b protruding forward from the lid 7a. The cylindrical portion 7b has an outer shape that just fits the outer cylinder 2 and is fitted to the outer cylinder 2. Note that an air introduction hole may be formed in the tail plug 7.

Next, the operation of the applicator of the present embodiment will be described. When the applicator 1 of the present embodiment is not in use, the valve element 12 is moved by the elastic restoring force to the opening 14a
, And the valve 6 is closed. Therefore, there is no supply of ink from the ink tank 3 to the chip 5.

At the time of writing pressure, the tip 5 is moved to the first position by writing pressure.
The valve body 12 is deformed and the front opening 14a is opened, and the ink in the valve chamber 11
Will be supplied.

When the tip 5 moves backward by the second movement amount or more and a pressing force exceeding a predetermined amount acts on the valve body 12, the valve body 12 is deformed to close the valve 6, and the valve chamber is closed. The supply of the ink into 11 is stopped. For this reason, it is possible to prevent excess ink from being supplied to the chip 5 during writing.

Further, since the pen pressure is received by the elastic deformation of the valve body 12, the user hardly feels the so-called touching feeling of the tip 5.

FIG. 5 shows an applicator according to a second embodiment of the present invention. The configuration different from that of the first embodiment is that, as shown in FIG. When the valve body 12 is moved by an amount or more and pressed and deformed more than a predetermined amount, its equatorial portion abuts on the inner surface of the side wall 11 b of the valve chamber 11,
This is a point that the valve 6 is configured to be closed, and the other configuration is the same, so that the detailed description is omitted.

The present invention is not limited to the above embodiment, and the design can be changed as appropriate. For example, the ink tank 3 and the plug 4 can be integrally formed.
Further, the tank 3 and the outer main body are not limited to cylindrical members, and various shapes can be adopted. Further, the valve element 6 can be designed so that the valve element 12 is opened when the valve element 12 is deformed by the writing pressure, and the valve element 12 is not deformed at the writing pressure level and the chip is intentionally strongly pushed. It is also possible to design the valve to open at that time.

[0041]

According to the present invention, when not in use, there is no ink supply because the valve body in the valve chamber closes the opening, and the valve body is applied by the application pressure acting on the chip during use or by intentional pushing of the chip. Is pressed to open the coating liquid outflow hole of the valve seat, so that the ink in the valve chamber can be supplied to the chip in minute amounts. For this reason, the applicator of the present invention is free from ink fogging and can supply an appropriate amount of ink to the chip during writing. In addition, the valve body is made of an elastically deformable material, so that the so-called hit feeling is reduced,
There is no discomfort to the user. Also, by configuring the valve body itself with an elastic member, an urging member such as a spring is not required,

When the valve body receives a pressing force exceeding a predetermined value, the valve body and the inner wall of the valve chamber come into contact with each other so as to stop the supply of the coating liquid. If the valve body moves and a predetermined pressure or more acts on the valve body, the valve body contacts the inner wall of the valve chamber and closes the valve, so that excessive ink is not supplied when writing is continued. Therefore, even if writing is continued, there is no possibility that ink flapping will not occur.

[Brief description of the drawings]

FIG. 1 is an overall sectional view of an applicator according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an enlarged sectional view of a tip portion of a housing (valve chamber) of a valve of the applicator. FIG. 3A shows a state in which a pressing force from a chip is not applied and a front opening is closed. , (B)
Indicates a state in which the pressure is applied from the tip to close the valve.

FIG. 4 is a sectional view taken along line BB of FIG.

FIG. 5 is a simplified cross-sectional view showing the entire configuration of a valve of an applicator according to a second embodiment of the present invention. FIG. 5A shows a state in which a pressing force from a tip is not acting and a front opening is closed. (B) shows a state in which the front opening is opened by the pressing force from the chip, and (c) shows a state in which the valve is closed by the pressing force of a predetermined amount or more from the chip. Show.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Free ink type writing implement (coating tool) 2 Outer cylinder (outer body) 3 Ink tank (tank) 4 Tip plug (valve housing) 5 Chip 6 Coating liquid supply valve 8 Backflow prevention member 9 Receiving seat 11 Valve chamber 11a Side wall 12 Valve Body 14 Valve seat 14a Coating liquid outflow hole (tip opening) 15 Flow passage (slit)

Claims (8)

[Claims] 1. A tank containing a coating liquid, a chip movable forward and backward provided on the front side of the tank, and a coating liquid supplying and stopping the coating liquid from the tank to the chip by the forward and backward movement of the chip. A supply valve, wherein the valve has a valve seat having a coating liquid outflow hole that opens forward, a valve element disposed behind the valve seat, and a valve element seated on the valve seat to close the outflow hole. A seat for supporting a rear portion of the valve body so as to close the valve body, a space between the seat and the valve seat is defined as a valve chamber, and the valve body is disposed in the valve chamber; A flow passage for flowing the coating liquid into the valve chamber is formed, and the valve body is formed of a material that can be elastically deformed to be compressed in the front-rear direction by receiving a pressing force due to the backward movement of the chip. Utensils. 2. The applicator according to claim 1, wherein the valve body has a spherical shape. 3. The valve body according to claim 1, wherein the valve body closes the flow passage of the receiving seat when receiving a pressing force equal to or more than a predetermined value.
An applicator according to item 1. 4. The valve chamber is constituted by a cylindrical space, and when the valve body receives a pressing force of a predetermined value or more, the equator portion of the valve body and the inner surface of the peripheral wall of the valve chamber come into contact with each other over the entire circumference. The applicator according to claim 2. 5. A coating liquid supply valve of an application tool for supplying a coating liquid contained in a tank to a chip by retreating the chip, wherein a valve body is disposed in a valve chamber having a coating liquid outflow hole. The valve body has a seat for supporting the valve body so as to close the outflow hole. The seat has a flow passage through which the coating liquid flows in the valve chamber, and the valve body is made of silicon rubber or the like. It is formed of a material that can be elastically deformed, and the valve body that has been subjected to the pressing force due to the retraction of the chip is elastically deformed so as to be compressed in the front-rear direction and opens the coating liquid outflow hole. Coating liquid supply valve of the coating tool to be applied. 6. The application liquid supply valve according to claim 5, wherein the valve body has a spherical shape. 7. The valve body according to claim 5, wherein the valve body closes the flow passage of the receiving seat when receiving a pressing force equal to or more than a predetermined value.
3. The coating liquid supply valve of the coating tool according to 1. 8. The valve chamber is constituted by a cylindrical space, and when the valve body receives a pressing force equal to or more than a predetermined value, the equator portion of the valve body and the inner surface of the peripheral wall of the valve chamber come into contact with the entire circumference. A coating liquid supply valve for the coating tool according to claim 6.