JP3833960B2 - Applicator - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to an applicator filled with a coating liquid having a high viscosity in which a pigment is dispersed in a solvent, such as a correction liquid and a cosmetic liquid.
[0002]
[Prior art]
The applicator with a spherical application body is filled with a coating liquid with a high viscosity in which a pigment is dispersed in a solvent in a coating liquid tank corresponding to a shaft cylinder of a writing instrument. The chip is attached via As in the case of the ballpoint pen, the spherical application body is held in a freely rotating manner with a part of the tip protruding from the tip. The spherical coated body is repelled by a spring, and when not in use, the spherical coated body is brought into close contact with the inward leading edge of the chip, and the spherical coating body and the leading edge of the chip constitute a valve structure so that the coating liquid is not discharged. I have to.
[0003]
In use, when the spherical application body is pressed against the application surface, the spherical application body moves back against the spring force of the spring, and a gap is formed between the spherical application body and the tip edge of the tip. The coating liquid adhering to the portion inside the chip passes through this gap and is applied to the outside of the chip as the spherical coated body rotates.
[0004]
Since the film-forming coating solution filled in the coating solution tank is a pigment dispersed in a solvent, the pigment separates from the solvent and precipitates when left for a long time. For this reason, it is necessary to dispose a spherical or rod-shaped stirring member in the coating liquid tank, stir the coating liquid with a stirring member that moves up and down by shaking the applicator, and disperse the separated pigment in the solvent. .
[0005]
[Problems to be solved by the invention]
A tip that freely holds a spherical application body having a diameter of about φ1 mm has an outer diameter of about φ3 mm, and the tip is fitted to the middle part of the central hole at the tip of the shaft tube or the tip. Therefore, the inner diameter of the center hole of the tip is about φ3 mm. On the other hand, the inner diameter of the coating liquid tank is about φ8 mm, and the outer diameter of the stirring bar arranged in the coating liquid tank is about φ6 mm. For this reason, even if the applicator is shaken up and down, the stirrer does not penetrate into the center hole of the tip, so the pigment settled in the portion where the tip of the tip of the tip hole is not fitted cannot be stirred. .
[0006]
By the way, there is a case where a long period of time elapses after the applicator is manufactured and before it reaches the user's hand. Thus, when the pigment of the coating liquid settles in the chip, there is a problem that the coating liquid is not smoothly discharged from the tip of the chip when the user first uses it (at the time of first writing).
[0007]
Therefore, an object of the present invention is to provide an applicator that smoothly discharges a coating liquid from a tip end of a tip at the time of first writing.
[0008]
[Means for Solving the Problems]
In order to achieve this object, the invention of claim 1 is arranged such that a tip having a spherical application body rotatably held in the center hole at the tip is fitted, and the piercing tube communicates with the center hole at the tip. The end barrel is sealed with a filling plug, the cartridge is filled with coating liquid, and the tail plug is fitted into the tail end opening of the barrel. When it is pushed to a predetermined position in the tail end opening of the cylinder, the plug of the cartridge arranged in the shaft cylinder is retreated by the piercing tube, the sealing of the tip opening is released, and the coating liquid in the cartridge is supplied to the chip. The tail plug is hermetically fitted into the tail end opening of the shaft cylinder, and the space between the shaft cylinder and the cartridge is used as a sealed space, and the shaft cylinder and the cartridge are thin walls each having a thickness of 0.5 to 1.0 mm. It is molded with synthetic resin with high flexibility, and grip strength at the time of application More barrel and space volume is decreased cartridges between the cartridge is pressurized, also cartridges the temperature rises in the space so that pressurized by the body temperature of the hand at the time of application.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a cross-sectional view showing a state before the applicator is shipped. In FIG. 1, the shaft cylinder 10 is formed of a synthetic resin, such as nylon or PBT, and the wall thickness is 0. It is thin in the range of 5 to 1.0 mm, for example, 0.6 mm. A small-diameter portion 11 corresponding to the tip of the writing instrument is integrally formed at the tip of the shaft tube 10, but a tip that replaces the small-diameter portion 11 may be separately provided and fixed to the tip of the shaft tube 10. . A chip 20 is fitted into the center hole 12 of the small diameter portion 11. Further, a cylindrical piercing tube 30 with a tail end face 31 cut obliquely is inserted and fixed in the center hole 12 of the small diameter portion 11, and the tail end portion of the piercing tube 30 is a shaft tube 10. Protrusively inside. That is, the center hole 32 of the piercing tube 30 communicates with the tip 20. The piercing tube 30 may be formed integrally with the shaft tube 10. Further, when not in use, the cap 60 is fitted to the small diameter portion 11 of the shaft tube 10.
[0011]
The tip 20 is formed in a bullet shape with stainless steel, and a spherical application body 21 made of a hard ball having a diameter of, for example, φ1.0 mm is partly exposed from the tip of the tip 20 in a ball house at the tip of the tip 20. It is a ballpoint pen type that can be held freely in the extended state. The chip 20 may be made of a metal pipe. A spring 22 having a small mass is disposed in the tip 20, and the spring 22 repels the spherical application body 21 and presses against the inward tip edge of the tip 20. That is, the spherical application body 21 and the tip edge of the tip 20 constitute a valve mechanism so that the coating liquid is not discharged from the tip of the tip 20 when not in use.
[0012]
The cartridge 40 is formed into a bottomed cylindrical shape with a synthetic resin, such as nylon or PBT, like the shaft cylinder 10, and has a thin wall thickness in the range of 0.5 to 1.0 mm. For example, it is 0.6 mm. A front end opening member 41 is fitted to the front end portion of the cartridge 40, and a filling plug 42 made of a metal sphere and serving also as a stirrer is press-fitted into the front end opening member 41. That is, the front end opening of the cartridge 40 is sealed by the filling plug 42. The cartridge 40 is filled with, for example, a coating liquid which has a viscosity of 30 to 40 cps and has a high film forming property in which a pigment is dispersed in a solvent.
[0013]
Such a cartridge 40 is arranged in the shaft tube 10, but at the time of shipment, the tail end surface 31 of the piercing tube 30 enters the tip opening member 41 of the cartridge 40, but the plug 42 is connected to the tip opening member 41. The cartridge 40 is not opened. That is, there is no coating liquid in the chip 20. A tail plug 50 having a hook-shaped stopper 51 is fitted on the outer peripheral surface of the tail end opening 13 of the shaft tube 10, and the tip of the tail plug 50 is in contact with the tail end surface of the cartridge 40.
[0014]
Thus, in the first use, the user pushes in until the stopper 51 of the tail plug 50 comes into contact with the tail end edge of the shaft tube 10 as shown in FIG. As a result, the tail end surface 31 of the piercing tube 30 pushes the plug 42 into the cartridge 40, and the tip opening of the cartridge 40 is opened. Accordingly, the coating liquid in the cartridge 40 is supplied into the chip 20 through the central hole 32 of the piercing tube 30, and the coating liquid is smoothly discharged from the tip of the chip 20 at the time of the first writing.
[0015]
A minute annular protrusion is formed on the outer peripheral surface of the tail plug 50 and the inner surface of the tail end portion of the shaft tube 10, and when the stopper 51 of the tail plug 50 is pushed in until it contacts the tail end edge of the shaft tube 10, The tail plug 50 is fitted in the tail end opening 13 of the shaft tube 10 in an airtight state, and the space S between the inner peripheral surface of the shaft tube 10 and the outer peripheral surface of the cartridge 40 becomes a sealed space. Further, since the shaft cylinder 10 and the cartridge 40 are thin and rich in flexibility, the shaft cylinder 10 is deformed by the gripping force at the time of application, the volume is reduced, and the air in the space S is pressurized. For this reason, the cartridge 40 is pressurized by the pressure. Further, since the thickness of the shaft tube 10 is thin, the heat conducting ability is large, and the air in the space S is heated and expanded by the body temperature of the user's hand during application, and pressurizes the cartridge 40. Accordingly, the coating liquid in the cartridge 40 is pressurized by these pressurizations and is smoothly discharged from the tip of the chip 20.
[0016]
【The invention's effect】
As described above, the applicator of the present invention is arranged so that the tip having a spherical applicator rotatably held in the center hole at the tip is fitted, and the piercing tube communicates with the center hole at the tip. It is composed of a shaft tube, a cartridge whose tip opening is sealed with a stopper and filled with a coating solution, and a tail plug fitted into the tail end opening of the shaft tube. When the tail end opening is pushed to a predetermined position, the plug of the cartridge disposed in the shaft cylinder is retracted by the piercing tube, the sealing of the tip opening is released, and the coating liquid in the cartridge is supplied to the chip. The applicator can smoothly discharge the coating liquid from the tip of the tip during the first writing.
Further, the tail plug is hermetically fitted into the tail end opening of the shaft cylinder, the space between the shaft cylinder and the cartridge is used as a sealed space, and the shaft cylinder and the cartridge are thin walls each having a thickness of 0.5 to 1.0 mm. In addition, since it is molded from a flexible synthetic resin, the cartridge is pressurized during coating, and the coating solution is discharged well.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a state at the time of shipment.
FIG. 2 is a cross-sectional view showing a state in use.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Shaft cylinder 11 Small diameter part 12 Small hole center hole 13 Shaft cylinder tail end opening 20 Tip 21 Spherical application body 22 Spring 30 Piercing pipe 31 Piercing pipe tail end surface 32 Piercing pipe center hole 40 Cartridge 41 Tip opening Member 42 Filling plug 50 Tail plug 51 Stopper 60 Cap

Claims (1)

A tip having a spherical application body rotatably held in the center hole at the tip is fitted, and a shaft cylinder arranged so that the piercing tube communicates with the center hole, and the tip opening is sealed with a plug, It consists of a cartridge filled with coating liquid inside and a tail plug fitted into the tail end opening of the shaft tube.
When the tail plug is pushed to a predetermined position at the tail end opening of the shaft cylinder at the time of the first writing, the plug of the cartridge arranged in the shaft cylinder is retreated by the piercing tube, and the sealing of the tip opening is released, The coating liquid in the cartridge is supplied to the chip,
The tail plug is airtightly fitted into the tail end opening of the shaft cylinder so that a space between the shaft cylinder and the cartridge becomes a sealed space, and the shaft cylinder and the cartridge each have a thickness of 0.5 to 1.0 mm. It is made of synthetic resin that is thin and flexible, and the gripping force during application reduces the volume of the space between the barrel and the cartridge to pressurize the cartridge. An applicator characterized in that the temperature of the space rises and the cartridge is pressurized.

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