JP2000279871A - Coating tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coating tool produced at low production cost and capable of properly adjusting the inner pressure of a coating liquid and stably discharging the coating liquid. SOLUTION: This coating tool comprises a tip 3 holding and supporting a spherical coating body 4 in a freely rotatable manner and a coating liquid tank 1 filled with a coating liquid and to which the tip 3 is connected. In this case, a circular recessed part 53 having an arc-like cross-section surface is formed in a small diameter part 51 in the rear end of the coating liquid tank 1 and a cylinder member 5 having a ventilation hole 52 in the diameter direction of the recessed part 53 is installed in the recessed part 53, an O-ring 6 for closing the ventilation hole 52 is fitted in the outer circumferential face of the small diameter part 51, and a piston member 7 having a through hole 71 is installed in the cylinder member 5. By pushing the piston member 7 forward while closing the through hole 71 with a finger tip, the pressurized air in the inside of the cylinder member 5 opens the O-ring 6 and enters the coating liquid tank 1 through the ventilation hole 52 and pressurizes the inside of the coating liquid tank 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an applicator filled with a high-viscosity coating liquid such as a correction liquid or a cosmetic liquid.

[0002]

2. Description of the Related Art An applicator having a spherical applicator has a tip attached to a tip of a coating liquid tank filled with a coating liquid through a tip, and like a ballpoint pen, a tip is partially attached to the tip. The spherical application body is held rotatably in a state where it comes out from the tip. Then, the spherical application body is repelled by a spring, and when not in use, the spherical application body is brought into close contact with the inward tip edge of the chip, and a valve structure is formed by the spherical application body and the tip edge of the chip so that the application liquid is not discharged. Like that.

[0003] In use, when the spherical coated body is pressed against the coated surface, the spherical coated body retreats against the resilience of the spring, and a gap is formed between the spherical coated body and the tip edge of the chip. The coating liquid adhering to the inside of the chip of the coating body is applied to the outside of the chip through this gap with the rotation of the spherical coating body and is applied, but since the viscosity of the coating liquid is high, the coating liquid is in a natural state. Is not sufficiently supplied to the surface of the spherical coated body. For this reason, conventionally, the coating liquid tank is blow-molded with a flexible material so as to be deformable, and at the time of use, the coating liquid tank is pressed with a fingertip to pressurize the inside, and the pressure is used to apply the coating liquid to the spherical coated body. To the surface. However, since the application liquid tank is blow-molded with a flexible material, there is a problem that the manufacturing cost is increased.

Therefore, recently, a cap press type applicator has been put to practical use. With a cap pressurizing applicator, the coating liquid tank is injection molded with a hard synthetic resin, and when the cap is fitted, the air in the pressurized cap enters the coating liquid tank from the tip of the chip and is applied. The inside of the liquid tank is pressurized.

[0005]

As described above, the applicator of the cap pressurizing method can be manufactured at a low cost because the application liquid tank is injection-molded with a hard synthetic resin. There is an advantage that the operation is simple because there is no need to press the inside to pressurize the inside. However, since the fitting of the cap is usually performed after the application work is completed,
When applying a wide coating area, the pressure in the coating liquid tank drops on the way and the discharge of the coating liquid deteriorates. Conversely, if a small amount of coating is applied and the cap is Pressure may become too high and the coating liquid may drop. In other words, the cap pressurizing applicator has a problem in that it is difficult to keep the pressure in the applicator tank optimal, and the ejection of the applicator liquid is not stable.

Accordingly, an object of the present invention is to provide an applicator which has a low production cost, can appropriately adjust the pressure in the application liquid tank, and can stably discharge the application liquid.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is directed to a spherical coating body in which a spherical coating body is rotatably held with a part thereof protruding from the tip of a chip. Is repelled by a spring and contacts the inward leading edge of the chip, and the chip is injection molded with hard synthetic resin in a coating tool connected to a coating liquid tank filled with a highly viscous film forming coating liquid. At the tail end of the applied coating liquid tank, an annular concave section having a circular cross section is formed at the small diameter portion at the tip, and a bottomed cylindrical cylinder member having a radial vent hole in the concave section is disposed. An O-ring made of a soft elastic material that covers the ventilation hole is inserted into the concave portion of the small-diameter portion that protrudes into the tank, and the piston member having the axial through-hole is resiliently moved toward the tail end by a spring. Placed in the fingertip through hole When the piston member is advanced in the closed state, the air in the pressurized cylinder member expands the O-ring, enters the coating liquid tank from the vent hole, and pressurizes the coating liquid tank. I do.

[0008]

Embodiments of the present invention will be specifically described below with reference to the drawings. In FIG.
The tip 3 is fitted in the opening at the tip of the device. Chip 3
A spherical coating 4 made of a carbide ball having a diameter of, for example, 1.0 mmφ is formed in a ball house at the tip of the tip 3 with a part thereof protruding from the tip of the tip 3. Held freely in rotation. In addition,
The tip 3 may be made of a metal pipe. A small-mass spring (not shown) is arranged in the chip 3.
And presses against the inward leading edge of the chip 3.
That is, a valve mechanism is formed by the spherical coating body 4 and the tip edge of the chip 3 so that the coating liquid is not discharged from the tip of the chip 3 when not in use.

The tip 2 into which the chip 3 is fitted is connected to the coating liquid tank 1. The coating liquid tank 1 is injection-molded with a normal hard synthetic resin, and its manufacturing cost is lower than that obtained by blow-molding a flexible material. A coating liquid having a viscosity of, for example, 30 to 40 cps and having a high film forming property is filled from the inside of the coating liquid tank 1 and the front end 2 to the chip 3. When not in use, the cap 9 is fitted to the front end 2.

A cylinder member 5 is fixed to the tail end of the coating solution tank 1, and the tail end portion of the cylinder member 5 projects outside from the coating solution tank 1. The cylinder member 5 has a bottomed cylindrical shape, and has a small-diameter portion 51 formed at the tip, and the small-diameter portion 51 protrudes into the coating liquid tank 1. As shown in FIG. 2, the small-diameter portion 51 is formed with an annular concave portion 53 having an arc-shaped cross section. In the concave portion 53, for example, two radial ventilation holes 52 are formed so as to face each other. ing.

An O-ring 6 made of a soft elastic material is fitted in the concave portion 53 of the small-diameter portion 51, and the O-ring 6 normally closes the ventilation hole 52. However, when the pneumatic force in the cylinder member 5 increases, the O-ring 6 facing the air hole 52 expands, and the blockage of the air hole 52 is released. Therefore, the inside of the cylinder member 5 and the coating liquid tank 1
Communicate with each other through a vent hole 52, and the cylinder member 5
The inside air enters the coating liquid tank 1.

The piston member 7 disposed in the cylinder member 5 projects from the cylinder member 5 and has an axial through hole 71 at the center. An O-ring 72 is inserted into the outer peripheral surface of the piston member 7, and slides in an airtight state with the inner peripheral surface of the cylinder member 5. A spring 8 is interposed between the step 54 of the cylinder member 5 and the step 72 of the piston member 7, and the piston 8 is repelled by the spring 8 to the tail end side.

However, when the application liquid is discharged when the application is started or during the application operation, as shown in FIG. 3, the knocking operation is performed while the through hole 71 of the piston member 7 is closed with the fingertip. , The piston member 7 is advanced. At this time, since the through hole 71 of the piston member 7 is closed by the fingertip, the inside of the cylinder member 5 becomes a closed space, but the air inside the cylinder member 5 is pressurized as the piston member 7 advances. When the air pressure becomes equal to or higher than a predetermined value, the portion of the O-ring 6 inserted into the concave portion 53 expands at the portion facing the vent hole 52 to become elliptical, and the blockage of the vent hole 52 is released. The air in 5 enters the coating liquid tank 1 through the ventilation holes 52, and the inside of the coating liquid tank 1 is pressurized. Further, even if the O-ring 6 expands in an elliptical shape, most of the O-ring 6 remains fitted in the recess 53, so that the O-ring 6 does not fall out of the recess 53.

When the knocking operation is released, the inside of the cylinder member 5 communicates with the atmosphere through the through hole 71 of the piston member 7, so that the piston member 7 is quickly returned to the original position by the elastic force of the spring 8, and , O-ring 6
Closes the ventilation hole 52 and returns to the state shown in FIG. When the ejection of the application liquid is not enough in one knocking operation, the knocking operation may be repeated as necessary. Conversely, when it is desired to slightly pressurize the inside of the application liquid tank 1, the knocking operation may be canceled halfway without pushing the piston member 7 to the end.

As described above, since the pressure in the coating liquid tank 1 can be appropriately adjusted by the knocking operation, a good and stable discharge of the coating liquid can be obtained. Also, the coating liquid tank 1
Is injection-molded with a hard synthetic resin instead of blow-molded with a flexible material, so that it can be manufactured at low cost.

[0016]

As described above, according to the present invention, the spherical coated body is rotatably held with a part thereof protruding from the tip of the chip, and the spherical coated body is repelled by the spring. The tip of the coating solution tank, which is injection-molded with a hard synthetic resin, is brought into contact with the coating solution tank filled with a highly viscous film-forming coating solution. At the tail end, a small-diameter portion at the tip forms an annular recess having an arc-shaped cross section, and a bottomed cylindrical cylinder member having a radial ventilation hole is arranged in the recess, so that the small diameter protrudes into the application liquid tank. An O-ring made of a soft elastic material that closes the ventilation hole is filled in the concave part of the part, and a piston member having an axial through hole is arranged in the cylinder member in a state where the piston member is repelled in the tail end direction by a spring, and the fingertip is used. Piston with the through hole closed When the material is advanced, the air in the pressurized cylinder member expands the O-ring and enters the coating liquid tank from the ventilation hole, and the inside of the coating liquid tank is pressurized. In addition, the pressure in the coating liquid tank can be appropriately adjusted, and the coating liquid can be discharged stably.

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a front view of a cylinder member.

FIG. 3 is an explanatory diagram of a knock operation.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 coating liquid tank 2 tip 3 tip 4 spherical coating body 5 cylinder member 51 small diameter portion of cylinder member 52 vent hole 53 concave portion 6 O-ring 7 piston member 71 through hole of piston member 8 spring 9 cap

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2C350 GA03 HA09 KC01 KC25 KC26 NA08 NC04 NC20 4F042 AA01 FA27 FA29 FA30 FA34 FA40

Claims (1)

[Claims] 1. A spherical coating body is rotatably held with a part of the spherical coating body protruding from a tip of a chip, and the spherical coating body is repelled by a spring to form an inward tip edge of the chip. In contact with the application tool connected to a coating liquid tank filled with a film-forming coating liquid having a high viscosity, the tip has a small-diameter portion at the tail end of the coating liquid tank injection-molded with a hard synthetic resin. An annular recess having an arc-shaped cross section is formed in the small-diameter portion, and a bottomed cylindrical cylinder member having a radial ventilation hole is disposed in the recess. An O-ring made of a soft elastic material that covers the vent hole is inserted into the cylinder member, and a piston member having an axial through hole is repelled toward the tail end by a spring and disposed in the cylinder member. With the hole closed, the piston When the cylinder is moved forward, the pressurized air in the cylinder member expands the O-ring and enters the coating liquid tank from the vent hole, and the coating liquid tank is pressurized. Utensils.