JP4251632B2 - Applicator - Google Patents

Description

  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.

  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.

  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.

  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. .

  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. .

  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. As described above, when the pigment of the coating liquid settles in the chip, the coating liquid on which the pigment has settled cannot be stirred, so that the coating liquid does not smoothly discharge from the tip of the chip when the user first uses (at the time of the first writing). There is a bug.

Therefore, the tip opening of the coating solution tank is sealed with a filling plug, and when the user pushes the tail end of the coating solution tank placed in the shaft cylinder at the time of the first writing, the tip of the coating solution tank is pushed by the extrusion pipe at the tip. If the opening plug is retracted and opened, the coating liquid enters the tip for the first time at the time of the first writing, so that the coating liquid is smoothly discharged from the tip of the chip. However, when the user pushes the coating liquid tank so that the front end opening of the coating liquid tank is fitted into the extrusion pipe of the leading end, the leading end and the coating liquid tank are not completely fixed. Therefore, when stirring the coating liquid by shaking the applicator up and down, the stirrer strongly collides with the bottom surface of the coating liquid tank, and the shock may loosen the fitting between the tip and the coating liquid tank, and the coating liquid may leak out. There is sex.
JP2003-300999A

  Therefore, the present invention smoothly discharges the coating liquid from the tip of the tip at the time of the first writing, and does not loosen the fitting between the tip and the coating liquid tank when stirring the coating liquid, and there is no risk of the coating liquid leaking out. An object is to provide an applicator.

In order to achieve such an object, the present invention provides a tip having a push tube that is rotatably held in a center hole at the tip and having a push tube that communicates with the center hole. The coating liquid tank is attached to the opening and the front end opening is sealed with a filling plug, and the coating liquid is filled therein, and the stirrer is accommodated. The first recess and the second recess are formed on the outer peripheral surface of the tail end of the coating liquid tank. On the other hand, a locking projection is formed on the inner peripheral surface in the vicinity of the tail end of the shaft cylinder, and this coating liquid tank is temporarily fixed to the extrusion pipe at the front end and accommodated in the shaft cylinder. When the tail end portion of the coating liquid tank protruding from the tail end opening of the shaft cylinder is pushed in, the locking projections locked to the first recess of the coating solution tank are locked to the second recess, and the coating solution tank The fitting part at the tip is fitted into the extrusion pipe, and the plug of the coating liquid tank is retracted by the extrusion pipe. Is released sealing of the distal end opening, the coating solution is made to be a coatable supplied to the chip. Moreover, it is preferable to form a plurality of slits in the axial direction from the tail end edge of the shaft tube.

  When the tail end of the coating liquid tank protruding from the tail end opening of the shaft cylinder is pushed in at the time of the first writing, the fitting portion at the tip of the coating liquid tank is fitted into the extrusion pipe, and the plug of the coating liquid tank is blocked by the extrusion pipe. The tip opening is unsealed, and the coating solution in the coating solution tank is supplied to the chip for the first time, so that the coating solution is smoothly discharged from the tip of the chip at the first writing. Then, when the coating liquid is stirred by shaking the applicator up and down, the stirrer collides with the bottom surface of the coating liquid tank, and the impact of the stirrer causes the coating liquid tank to retreat, loosening the fitting with the extrusion tube, and leakage of the coating liquid. Although there is a risk of taking out, because the locking protrusion formed on the inner peripheral surface near the tail end of the shaft cylinder is locked to the second recess formed on the outer peripheral surface of the tail end portion of the coating liquid tank, The coating liquid tank does not move backward, and the risk of loosening the fit is eliminated. Further, when a plurality of slits are formed in the axial direction from the tail end edge of the shaft tube, when the coating liquid tank is pushed in, the locking protrusions locked in the first recess are easily locked in the second recess. I can do it.

  The purpose of the first writing is to eliminate the risk that the coating liquid leaks smoothly from the tip of the tip at the time of the first writing, and the tip and the coating liquid tank do not loosen when the coating liquid is agitated. When the tail end of the coating liquid tank protruding from the tail end opening of the shaft cylinder is pushed in, the plug of the coating liquid tank is retracted by the extrusion pipe, and the sealing of the tip opening is released. The liquid is supplied to the tip for the first time, and the locking projection formed on the inner peripheral surface near the tail end of the shaft tube is engaged with the second recess formed on the outer peripheral surface of the tail end portion of the coating liquid tank. Realized with a simple structure to stop.

  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 front end 20 is attached to the tip opening of the shaft tube 10. The shaft tube 10 and the tip 20 may be integrally formed. On the inner peripheral surface of the tail end portion 10a of the shaft tube 10, as shown in FIG. 2 (A), a locking projection 11 having a right triangle is formed. Moreover, the slit 12 is formed in the axial direction from the edge of the tail end part 10a in the both sides of the latching protrusion 11. FIG. A chip 30 is fitted in the center hole 21 of the tip 20. In addition, a cylindrical extruded tube 22 that protrudes toward the tail end side is formed inside the front end 20, and the inner surface of the extruded tube 22 communicates with the center hole 21. Further, when not in use, the cap 70 is fitted to the tip 20.

  The tip 30 is formed in a bullet shape with stainless steel, and a spherical application body 31 made of a carbide ball having a diameter of, for example, φ1.0 mm is partly exposed from the tip of the tip 30 in a ball house at the tip of the tip 30. It is a ballpoint pen type that can be held freely in the extended state. The chip 30 may be made of a metal pipe. A spring 32 having a small mass is disposed in the tip 30, and this spring 32 repels the spherical application body 31 and presses against the inward leading edge of the tip 30. That is, the spherical application body 31 and the tip edge of the tip 30 constitute a valve mechanism so that the coating liquid is not discharged from the tip of the tip 30 when not in use.

  The coating liquid tank 40 is formed into a bottomed cylindrical shape with a synthetic resin, for example, nylon or PBT, like the shaft cylinder 10, and has a thin wall thickness in the range of 0.5 to 1.0 mm. Yes, for example, 0.6 mm. A tip opening member 41 is fitted to the tip of the coating liquid tank 40, and a filling plug 42 made of a metal sphere and serving as a stirrer is press-fitted into the sealing portion 41a at the tip of the tip opening member 41. That is, the tip opening of the coating liquid tank 40 is sealed by the filling plug 42. The tip portion of the sealing portion 41a is a fitting portion 41b having an inner diameter smaller than that of the sealing portion 41a. The coating liquid tank 40 is filled with a coating liquid (not shown) which is a correction liquid having a high film-forming property, for example, having a viscosity of 30 to 40 cps and having a pigment dispersed in a solvent. Two stirrers 43 made of metal balls and a metal pipe 44 are arranged in the coating solution. Further, as shown in FIG. 2B, a first concave portion 45 and a second concave portion 46 are formed on the outer peripheral surface of the tail end portion of the coating liquid tank 40.

  The coating liquid tank 40 is arranged in the shaft cylinder 10, and the tail end portion 40 a of the coating liquid tank 40 protrudes from the tail end opening of the shaft cylinder 10, but the fitting portion 41 b is the tail end of the extruded tube 22. It is attached to the part and temporarily fixed. At this time, the locking projection 11 is locked to the first recess 45. Therefore, at the time of shipment, the tail end portion of the extruded tube 22 does not enter the sealing portion 41a of the coating liquid tank 40, and the filling plug 42 is pressed into the sealing portion 41a. The tank 40 is not opened. That is, there is no coating liquid in the chip 30.

  Thus, when the user first presses the tail end portion 40a of the coating liquid tank 40 protruding from the tail end opening of the shaft tube 10, the coating liquid tank 40 moves forward, and in the process, as shown in FIG. In addition, the locking projection 11 escapes from the first recess 45, but since the slit 12 is formed, the tail end portion 10a of the shaft tube 10 is easily expanded. Then, as shown in FIG. 4, the locking protrusion 11 is locked to the second recess 46. Further, the extruded tube 22 enters the sealing portion 41a greatly, and the extruded tube 22 is fitted into the fitted tube 41b. As a result, the tail end surface of the extruded tube 22 pushes the plug 42 into the coating solution tank 40, and the tip opening of the coating solution tank 40 is opened. Therefore, the coating liquid is smoothly discharged from the tip of the chip 30 at the time of the first writing. The plug 42 pushed into the coating liquid tank 40 serves as a stirring bar.

  When the coating liquid is stirred by shaking the applicator up and down in this state, the stirrer 43 collides with the bottom surface of the coating liquid tank 40, and a force that moves the coating liquid tank 40 backward by the impact acts. Is locked in the second recess 46, so that the coating liquid tank 40 does not move backward with a normal impact force. Therefore, the fitting between the extruded tube 22 and the fitting portion 41b is not loosened, and the risk that the coating liquid leaks out.

It is sectional drawing which shows the state at the time of shipment. (A) is a tail end part of a shaft cylinder, (B) is a perspective view of the tail end part of a coating liquid tank. It is explanatory drawing of the process which pushes in a coating liquid tank. It is sectional drawing which shows the state which can be apply | coated.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Shaft cylinder 10a Tail end part of shaft cylinder 11 Locking protrusion 12 Slit 20 Front opening 21 Center hole of front opening 22 Extrusion pipe 30 Tip 31 Spherical application body 32 Spring 40 Coating liquid tank 40a Tail end 41 tip of coating liquid tank Opening member 41a Sealing portion 41b Fitting portion 42 Stuffing plug 43 Stirrer 44 Metal pipe 45 First recess 46 Second recess 70 Cap

Claims (2)

A tip that rotatably holds the spherical application body is fitted in the center hole at the tip, and a tip having an extruded tube communicating with the center hole is attached to the tip opening of the shaft tube,
The coating liquid tank whose front end opening is sealed with a filling plug is filled with the coating liquid and a stirrer is accommodated, and a first concave portion and a second concave portion are formed on the outer peripheral surface of the tail end portion of the coating liquid tank. On the other hand, a locking projection is formed on the inner peripheral surface near the tail end of the shaft tube,
The coating liquid tank is accommodated in the shaft cylinder in a state of being temporarily fixed to the extrusion pipe,
When the tail end portion of the coating liquid tank protruding from the tail end opening of the shaft cylinder is pushed in at the time of the first writing, the locking projection locked to the first recess is locked to the second recess and the coating is applied. The fitting portion at the tip of the liquid tank is fitted into the extrusion tube, the plug of the coating solution tank is retracted by the extrusion tube, the sealing of the tip opening is released, and the coating solution is supplied to the chip and can be applied. An applicator characterized by that.   The applicator according to claim 1, wherein a plurality of slits are formed in an axial direction from a tail end edge of the shaft cylinder.

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