JP3342435B2 - Applicator - Google Patents

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 in which the projections protrude 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 coating 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 coating liquid tank, a cylindrical member with a bottomed bottom having a radial vent hole at the small diameter portion at the tip is arranged, and a vent hole is formed on the outer peripheral surface of the small diameter portion projecting into the coating liquid tank. A piston member having a through hole in the axial direction is inserted in the cylinder member in a state where the piston member is resiliently moved in a tail end direction by a spring, and the piston member having a through hole in the axial direction is filled in the cylinder member. Cylinder member on outer surface An upper O-ring and a lower O-ring that slide in an airtight manner are filled in the inner peripheral surface, and a space between the upper O-ring and the lower O-ring is filled with a grease-like sealant, and the through hole is closed with a fingertip. When the piston member is moved forward, the pressurized air in the cylinder member expands the closing body, enters the coating liquid tank through the vent hole, and pressurizes the coating liquid tank.

[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 opening 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 a tail end of the coating solution tank 1, and a 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. The small diameter portion 51 is provided with, for example, two radial ventilation holes 52.

A closing member 6 made of a soft elastic material, for example, silicone rubber is inserted into the outer peripheral surface of the small diameter portion 51.
Normally, the closing member 6 closes the ventilation hole 52. However, when the air force in the cylinder member 5 increases, the closing body 6 expands and the closing of the ventilation hole 52 is released. Therefore, the inside of the cylinder member 5 and the inside of the coating liquid tank 1 communicate with each other through the ventilation hole 52, and the air in the cylinder member 5 enters the coating liquid tank 1. That is, the closing body 6 plays a role of “sadness”.

The piston member 7 arranged in the cylinder member 5 has an axial through hole 71 at the center.
Therefore, the inside of the cylinder member 5 communicates with the outside through the through hole 71 of the piston member 7. A spring 8 is interposed between the stepped portion of the cylinder member 5 and the stepped portion of the piston member 7, and the piston member 7 is repelled toward the tail end by the spring 8.

As shown in FIG. 2, two annular grooves 75, 75 are formed at the distal end of the piston member 7, and an upper O-ring 72 and a lower O-ring 73 are fitted into the annular grooves 75, 75, respectively. Is embedded. The upper O-ring 72 and the lower O-ring 73 slightly protrude from the annular grooves 75, 75 and slide in an airtight manner with the inner peripheral surface of the cylinder member 5. The space between the upper O-ring 72 and the lower O-ring 73 is filled with a grease-like sealing agent 74 such as silicone oil or liquid paraffin.

However, when the application liquid discharge is reduced at the time of starting the application 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, as described above, the closing body 6 expands and the closing of the ventilation hole 52 is released, so that the air in the cylinder member 5 passes through the ventilation hole 52 and passes through the coating liquid tank 1. And the inside of the coating liquid tank 1 is pressurized.

When the knocking operation is released, the inside of the cylinder member 5 communicates with the atmosphere through the through hole 71, so that the piston member 7 returns to the original position promptly by the elastic force of the spring 8, and the closing member 6 is closed. 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 coating 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. In addition, the space between the upper O-ring 72 and the lower O-ring 73 that slides in an airtight manner with the inner peripheral surface of the cylinder member 5 is filled with a grease-like sealing agent 74, so that sealing is ensured, The upper O-ring 72 and the lower O-ring 73 slide easily due to the lubricating action of the sealant 74, and the knocking operation can be easily performed.

[0017]

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 bottomed cylindrical cylinder member having a radial vent hole at the small diameter portion at the tip is arranged, and is made of a soft elastic material that closes the vent hole on the outer peripheral surface of the small diameter portion protruding into the coating liquid tank. A piston member in which an obstruction body is inserted and a through-hole in the axial direction is drilled is arranged in a cylinder member in a state where the piston member is repelled in a tail end direction by a spring, and a cylinder member is provided on an outer peripheral surface of a distal end portion of the piston member. Airtightly slides on the inner peripheral surface of When the upper O-ring and the lower O-ring are filled and the space between the upper O-ring and the lower O-ring is filled with a grease-like sealant, and the through hole is closed with a fingertip, the piston member is advanced. The pressurized air in the cylinder member expands the closing body and enters the coating liquid tank through the vent hole, and the inside of the coating liquid tank is pressurized. Therefore, the manufacturing cost is low, and the pressure in the coating liquid tank is low. Can be adjusted appropriately, and an application tool with stable application liquid ejection can be obtained. Further, there is an advantage that the knocking operation is extremely easy.

[Brief description of the drawings]

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

FIG. 2 is an enlarged sectional view of a main part of the embodiment.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Coating liquid tank 2 Front end 3 Chip 4 Spherical coating body 5 Cylinder member 51 Small diameter part of cylinder member 52 Vent hole 6 Closure body 7 Piston member 71 Piston member through-hole 72 Upper O-ring 73 Lower O-ring 74 Sealant 75 Ring Groove 8 Spring 9 Cap

Continuation of the front page (56) References JP-A-10-28921 (JP, A) JP-A-10-235274 (JP, A) JP-A 6-16089 (JP, U) JP-A 7-25972 (JP, A) , U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B43L 19/00 A45D 34/04 B43K 7/03

Claims (1)

(57) [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. A bottomed cylindrical cylinder member having a radial vent hole is arranged, and a closing member made of a soft elastic material that covers the vent hole is fitted into the outer peripheral surface of the small diameter portion protruding into the coating liquid tank. Rarely, a piston member provided with an axial through-hole is disposed in the cylinder member in a state where the piston member is repelled in a tail end direction by a spring. Upper O-ring that slides hermetically on the inner peripheral surface And the lower O-ring is filled in, and the space between the upper O-ring and the lower O-ring is filled with a grease-like sealant, and the piston member is advanced with the finger hole closing the through-hole. The applicator wherein the pressurized air in the cylinder member expands the closing body, enters the coating liquid tank from the vent hole, and pressurizes the coating liquid tank.