JP2005059365A - Fluid body coating tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a low-priced fluid body coating tool which can suppress settling of an easily settling fluid liquid and growing worse of initial coating properties, can simplify a manufacturing installation when a fluid liquid storing pipe is pressed, does not bring about leakage of the fluid liquid while it is not coated, and has no possibility of blowing up of the fluid liquid. <P>SOLUTION: The fluid body coating tool is equipped with a shaft body 1, a refill unit 10 which is stored in the shaft body 1 and can be moved forward and backward in the shaft direction, a knocking mechanism 20 provided in the shaft body 1, and a pressing mechanism 40 placed between the refill unit 10 and a rotor 22 of the knocking mechanism 20. The refill unit 10 is composed of an ink storing pipe 12 for filling a white pigment ink 11 and a writing part 14 fitted on the apex part of the ink storing pipe 12 and projecting from the front part of the shaft body 1 during writing to open the end part of the ink storing pipe 12. A rubber holder 41 of the pressing mechanism 40 is brought into contact with the end part of the ink storing pipe 12 through a seal rubber 43, and the inner pressure in the ink storing pipe 12 is increased by the rotor 22 and the pressing mechanism 40 during writing. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a fluid applicator composed of a writing instrument including a ballpoint pen, a correction tool, a cosmetic tool, and the like, and more particularly to a fluid applicator filled with oil ink having shear thinning viscosity.

  Conventionally, in order to correct an error at the time of document preparation, a liquid writing instrument to which a white pigment ink is applied is generally used. Although not shown, this type of liquid writing instrument is composed of an elastic container for storing white pigment ink and a cap for opening and closing the pen tip of the container.

The white pigment ink is characterized in that the white pigment and the solvent are easily separated and the white pigment is easily precipitated. A stirring ball is inserted into the container, and this ball moves around the container by shaking the container when the liquid applicator is used, and functions to stir the white pigment ink (see Patent Document 1).
JP 2001-314805 A

  As described above, the conventional liquid writing instrument has a problem that the white pigment of the white pigment ink and the solvent are easily separated, and the white pigment is liable to settle. In order to solve this problem, a method has been proposed in which white pigment ink contains titanium oxide, polymer hollow fine particles, a white pigment, and a gelling agent, and suppresses the precipitation of the white pigment.

  However, when this method is adopted, the white pigment sedimentation can be suppressed and prevented, but the viscosity of the white pigment ink is increased, so that a big problem that initial writing performance is deteriorated newly arises. . In addition, in order to promote the discharge of the white pigment ink, it is necessary to pressurize the ink containing tube.

  In pressurizing the ink storage tube, a method has been proposed in which (1) the pressurized gas is sealed and (2) the pressure is applied by a knock operation during writing. However, in the case of the former method (1), the manufacturing equipment becomes complicated and the cost becomes high. In addition, since the ink storage tube is constantly pressurized, there is a high possibility that ink leakage will occur when writing is not performed when there is a problem with the sealability of the writing portion. In addition, due to the decrease in the internal pressure of the ink containing tube due to the consumption of the white pigment ink, it is necessary to increase the initial pressure when it is desired to use the white pigment ink effectively until the end. There arises a problem that the fear increases.

  On the other hand, in the case of the latter method (2) in which the pressure is applied by a knocking operation at the time of writing, for example, when the user repeats the knocking operation regardless of writing due to play or the like, the ink containing tube is continuously pressurized. The white pigment ink may be ejected. Furthermore, there is a problem that white pigment ink is supplied more than necessary during writing, and as a result, it is difficult to adjust the flow rate of the white pigment ink.

  The present invention has been made in view of the above, and can prevent sedimentation of a fluid liquid that tends to settle and deterioration of initial coating properties, can simplify production equipment even when pressurizing a fluid fluid storage tube, An object of the present invention is to provide an inexpensive fluid applicator that does not cause a fluid leakage at the time of application and that does not cause the fluid to be ejected.

In order to solve the above-described problems, the present invention includes a hollow shaft main body and a refill unit that is accommodated in the shaft main body and can be moved back and forth in the axial direction. Is something that will haunt you
A knock mechanism provided in the shaft main body, and a pressurizing mechanism interposed between the refill unit and a part of the knock mechanism,
The refill unit is composed of a fluid storage tube filled with fluid and a coating part attached to the fluid storage tube and protruding from the front part of the shaft body at the time of application. Open,
A pressurizing mechanism is brought into contact with the end portion of the fluid-liquid storage tube, and the internal pressure of the fluid-liquid storage tube during application is increased by a part of the knock mechanism and the pressure mechanism.

  The fluid liquid in the fluid container tube can be a pigment ink that contains at least a pigment and a gelling agent and requires pressure during application.

The knock mechanism includes a return spring interposed between the shaft main body and the fluid storage tube, and a substantially bottomed cylindrical rotor that is slidably fitted into a terminal portion of the fluid storage tube via a gap. A plurality of cams formed at intervals on the outer surface of the rotor, and a plurality of strips formed at intervals on the inner surface rear portion of the shaft body,
Each cam is formed in a substantially linear strip in the axial direction of the rotor, and its end is inclined to the engaging claw, and each strip is directed in the axial direction of the shaft body and its tip is cut into engaging teeth. Chipping,
When applying, the rotor is rotated to engage the engaging claw of the cam and the engaging tooth of the strip, making the application part of the refill unit protruding from the front part of the shaft body unretractable, and rotating the rotor when not applying Thus, the engagement between the cam and the strip can be released, each cam can be positioned between the plurality of strips, and the application portion of the refill unit protruding from the front portion of the shaft body can be retracted.

  Furthermore, the pressurizing mechanism is slidably fitted to the rotor of the knock mechanism via a pressurizing spring, and is attached to the holder, the substantially cylindrical holder that is in contact with the end portion of the fluid container tube, and at the time of application It can be constituted by a hollow sealing body that is in close contact with the inner surface of the rotor so that gas cannot flow into the rotor and is separated from the inner surface of the rotor when non-coated and allows gas to flow into the rotor.

  Here, the rotor in the claims may be directly exposed from the opened rear portion of the shaft body, or may be indirectly exposed through a decoration with a clip, a knock bar, or the like. The holder may or may not be equipped with a check valve that prevents the gas from flowing backward from the fluid container tube to the rotor. The holder can be attached with a hollow seal body or the like that is opposed to and contacted with the end surface of the fluid-liquid storage tube. Further, the fluid applicator includes a writing instrument including at least a ballpoint pen, a correction tool, or a cosmetic tool.

  According to the present invention, when the fluid applicator is used, the knock mechanism is knocked to slide the rotor as a part thereof. Then, the rotor provided with the pressurizing mechanism and the refill unit slide in the forward direction of the shaft body. At the time of this sliding, the holder is in contact with the end portion of the fluid container tube, but the inner surface of the rotor and the sealing body are separated to allow gas flow, so that the shaft body communicates with the inside of the rotor. .

  Next, when the fluid storage tube advances, the application part protrudes from the front part of the shaft body, and the application with the fluid is possible. When the fluid storage tube comes into contact with the front part of the shaft body and stops, only the rotor equipped with the pressurizing mechanism slides in the direction of the front part of the shaft body, and the inner surface of the rotor and the sealing body come into contact with each other to form a gas. The communication between the shaft main body and the rotor is restricted, and the rotor can be pressurized.

  After the rotor is in a pressurizable state in this way, when the rotor equipped with the pressurizing mechanism slides in the front part direction of the shaft body, the gas in the rotor is pressurized, and the compressed gas is fluidized. It flows into the terminal part of the storage tube, and the internal pressure of the fluid storage tube increases.

  When a sufficient amount of the fluid liquid cannot be obtained with the consumption of the fluid liquid, the fluid-liquid storage tube and the rotor are brought closer to each other by bringing the coating part into strong contact with the surface to be coated. Then, the fluid storage tube is retracted to pressurize the gas in the rotor, the compressed gas flows into the end of the fluid storage tube, and the internal pressure of the fluid storage tube increases.

  When the use of the fluid applicator is terminated, the knock mechanism is knocked to slide the rotor to the original position. In this way, the fluid applicator returns from the written state to the unwritten state due to the restoring action of the compressed return spring and the release of the cam and strip of the knock mechanism, and the fluid liquid storage tube is pressurized. Canceled. At this time, since the inner surface of the rotor and the sealing body are separated to form a gas flow path, the shaft main body and the interior of the rotor communicate with each other. Due to this communication action, the rotor and the fluid container tube are not pressurized.

  As described above, according to the present invention, there is an effect that it is possible to effectively suppress and prevent sedimentation of a fluid liquid that tends to settle and deterioration of initial coating properties. In addition, the manufacturing equipment can be simplified and the manufacturing cost can be reduced in pressurizing the fluid container tube. Furthermore, it is possible to effectively eliminate the risk of causing fluid leakage at the time of non-coating and the risk of fluid fluid ejecting.

  Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 6, a fluid applicator according to the present embodiment includes an elongated shaft body 1 that can be divided into two parts, and this shaft. A refill unit 10 that is exchangeably accommodated in the main body 1 and can be moved back and forth in its axial direction, a Kahn-type knock mechanism 20 provided in the shaft main body 1, a refill unit 10, and a rotor 22 of the knock mechanism 20 And a pressure mechanism 40 interposed therebetween, which corrects a mistake in writing a document as a liquid writing instrument to which the white pigment ink 11 is applied.

  As shown in FIG. 1 and FIG. 2, the shaft body 1 includes a front shaft 2 and a rear shaft 4 that are screwed together, and is formed into a hollow transparent using a predetermined synthetic resin made of polycarbonate or the like, The light transmittance is set to 30% to 100%, preferably 50% to 100%, more preferably 80% to 100%, and functions to allow inflow of outside air as a gas. The front shaft 2 is formed into a tapered cylindrical shape with an open front portion, and an open rear portion is formed thin, and a fastening screw groove 3 is threaded in the circumferential direction on the outer peripheral surface thereof.

  The rear shaft 4 is formed in a cylindrical shape, and a screw groove 3A that is detachably screwed with the screw groove 3 of the front shaft 2 is threaded in the circumferential direction on the front inner peripheral surface. The clip 5 is integrally formed toward the axial direction. On the inner peripheral surface of the rear shaft 4, a substantially elliptic drop-off prevention rib located behind the screw groove 3A is projected inward in the radial direction, and a plurality of drop-off prevention ribs are provided in the circumferential direction at predetermined intervals. It is installed side by side.

  As shown in FIG. 3, the refill unit 10 is mounted in communication with a transparent ink containing tube 12 filled with white pigment ink 11 and the tip of the ink containing tube 12. And a writing portion 14 protruding from the front portion.

  The white pigment ink 11 contains at least titanium oxide, polymer hollow fine particles, a white pigment, and a gelling agent, and has a characteristic that it requires high pressure because of its high viscosity and poor initial writing properties. The viscosity of the white pigment ink 11 is set to 1000 mPa · s or less in a 25 ° C. atmosphere at a shear rate of 400 / s, and is set to 300 mPa · s or more at a shear rate of 5 / s. Is done. This is because it is not necessary to stir the white pigment ink 11 or remove the cap when the viscosity of the white pigment ink 11 falls within such a range.

  The ink containing tube 12 is formed into a substantially convex shape having an elongated hollow cross section using a predetermined material such as a synthetic resin, and has a light transmittance of 30% to 100%, preferably 50% to 100%, more preferably 80. % To 100%. The tapered ink storage tube 12 is not particularly limited in material, structure (single layer or multilayer), etc., but from the viewpoint of excellent confirmation of the remaining amount of the white pigment ink 11, the light transmittance is 50% or more, Specifically, the light transmittance according to ASTM D792 is preferably 50% or more, and more preferably 80% or more.

  Examples of the material for the ink storage tube 12 include polypropylene (PP), polyethylene (PE), cyclic polyolefin, polymethylpentene, polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polystyrene (light transmittance of 80% or more). PS), polycarbonate (PC), acrylonitrile-butadiene-styrene copolymer (ABS), nylon resin (polyamide), polyethyleneimide (PEI), polyphenylene sulfide (PPS), polysulfone (PSU), aliphatic polyketone, polyethersulfide There are thermoplastic resins such as phon (PES), polyarylate (PAR), polyphenylene ether (PPE), silicone elastomer, olefin elastomer, polyvinyl chloride, and polyvinylidene chloride. It is. Among these, it is desirable to use a material having a light transmittance of 50% or more, more preferably 80% or more. In particular, nylon resin (polyamide) is optimal from the viewpoints of solvent resistance, visibility and economy.

  The ink storage tube 12 is filled with a grease-like follower 13 at the rear portion thereof, and the end portion is opened and opened. The follower 13 is positioned behind and follows the white pigment ink 11 and functions to suppress and prevent solvent evaporation of the white pigment ink 11. When the inner diameter of the ink storage tube 12 is large, the follower 13 is appropriately filled with a resin float made of polypropylene or the like.

  The writing unit 14 includes a tapered tip cover 15 fitted to the elongated tip portion of the ink containing tube 12, and the tip cover 15 incorporates a chip 17 for fitting and supporting a rotatable ball 16 so as to be able to appear and retract. Is done. A SUS push rod is pressed against the ball 16 of the tip 17 communicating with the ink containing tube 12 from behind by a biasing spring, and the pressure contact action of the push rod causes the ball 16 to move the tip of the tip 17 open. Functions to block when not written.

  As shown in FIGS. 1, 2, 4, and 5, the knock mechanism 20 includes a return spring 21 interposed between the shaft body 1 and the ink storage tube 12, and a gap at the end of the ink storage tube 12. The rotor 22 is slidably inserted via a plurality of cams, a plurality of cams 34 projecting at an interval on the outer peripheral surface of the rotor 22, and projecting at an interval on the rear portion of the inner peripheral surface of the shaft body 1. And a plurality of strips 36.

  The return spring 21 is formed of a coil spring, is fitted into the front end portion of the ink storage tube 12, contacts the front peripheral edge of the shaft body 1, and elastically biases the ink storage tube 12 toward the rear portion of the shaft body 1.

  The rotor 22 is formed into a substantially bottomed cylindrical shape using a synthetic resin made of polyacetal, polyoxymethylene, polyformaldehyde, and the like, and a knock bar 23 exposed from the opened rear portion of the shaft body 1 is formed on the closed bottom portion. Are fitted in a detachable and relatively rotatable manner, and a knocking crown 24 is fitted to the knock bar 23.

  The rotor 22 is formed in a hollow, generally convex shape continuously including a diameter-expanded portion 25 and a reduced-diameter portion 26, and the inside is formed in a pressurized chamber (volume reduction space) 22a for outside air (air). In addition, the inner peripheral surface is formed on the most enlarged diameter surface 27, the enlarged diameter surface 28, the reduced diameter surface 29, and the most reduced diameter surface 30 from the opening direction to the closed bottom portion direction. The rear shaft 4 is effectively regulated by the drop-off preventing rib. A plurality of continuous saw teeth 31 are provided in the circumferential direction on the step surface between the enlarged diameter portion 25 and the reduced diameter portion 26 of the rotor 22.

  The knock bar 23 is formed in a cylindrical shape using ABS resin or the like, and a plurality of drive teeth 32 that mesh with the saw-tooth 31 in a complete or incomplete manner on the opposing contact surface that contacts the step surface of the rotor 22 in the circumferential direction. It is continuously arranged. A plurality of guide ribs 33 project from the outer peripheral surface of the knock bar 23 at a predetermined interval, and the guide ribs 33 are slidably inserted between the plurality of strips 36. Engaging with the periphery, it effectively restricts the knock bar 23 from falling off the rear part of the shaft body 1.

  Each cam 34 is formed in a substantially linear shape in the axial direction of the rotor 22, and the end surface is linearly cut out in the circumferential direction, and is formed in the engaging claw 35 to be inclined. Further, each strip 36 is formed in a substantially linear strip so as to perform a guide function in the axial direction of the shaft body 1, and the distal end surface is notched in the circumferential direction to form engagement teeth 37. The engaging teeth 37 are engaged with the engaging claws 35 of the cam 34.

  As shown in FIGS. 1 and 2, such a knock mechanism 20 is configured such that, when writing, the drive teeth 32 of the knock bar 23 are in pressure contact with the saw teeth 31 of the rotor 22 to apply a drive force, whereby the rotor 22 Slides in the direction of the ink containing tube 12 while being guided by the plurality of strips 36 and rotates at a predetermined angle (for example, 30 ° or less), and the engagement claws 35 of the cam 34 and the engagement teeth 37 of the strips 36 And the writing portion 14 of the refill unit 10 protruding from the front portion of the shaft body 1 cannot be retracted, and functions to guide outside air from the pressurizing chamber 22a of the rotor 22 to the ink containing tube 12.

  On the other hand, when writing is not performed, the rotated rotor 22 further rotates at a predetermined angle (for example, 30 ° or less), and the cam 34 gets over the engagement teeth 37 of the strip 36 to release the engagement, so that the rotor 22 slides in the direction of the anti-ink containing tube 12 to position the cams 34 between the plurality of strips 36 so that the writing unit 14 protruding from the front of the shaft body 1 can be retracted.

  As shown in FIGS. 1, 2, and 6, the pressurizing mechanism 40 includes a rubber holder 41 that is slidably fitted into the rotor 22 of the knock mechanism 20 and faces the end surface of the ink containing tube 12, and the rubber holder A pressure spring 42 interposed between the rotor 41 and the rotor 22; a seal rubber 43 for securing airtightness, which is fitted to the outer peripheral surface of the rubber holder 41 and is opposed to and contacted with the end surface of the ink containing tube 12; It is fitted to the outer peripheral surface of the rubber holder 41 and close to the inner peripheral surface of the rotor 22 during writing so that the outside air cannot flow into the rotor 22, and when not written, the outside air is rotated away from the inner peripheral surface of the rotor 22. It is composed of an O-ring 44 for ensuring airtightness that can flow into the child 22.

  The rubber holder 41 is formed into a substantially cylindrical shape using a synthetic resin made of polyacetal, polyoxymethylene, polyformaldehyde, or the like, and a plurality of fitting grooves are cut out in the circumferential direction on the outer peripheral surface.

  The pressure spring 42 is a coil spring having a larger elastic force than that of the return spring 21, and is connected to the rubber holder 41 and the reduced diameter portion 26 of the rotor 22 through a mounting rib in a close fitting state. Functions to be biased toward the end of the ink containing tube 12.

  The pressure spring 42 and the return spring 21 have a repulsive force of 3 to 15 N when the refill unit 10 is retracted by pressing the ball 16 of the writing unit 14 protruding from the shaft body 1 after the knocking operation of the knock mechanism 20 is completed. Preferably it is set to 5N. This is because if the repulsive force of the pressure spring 42 and the return spring 21 is within a range of 3 to 15 N, the writing unit 14 does not fluff with the writing pressure during writing, and gives a firm writing feeling to the user. Because you can.

  The seal rubber 43 is formed into an endless ring using elastic silicone rubber, NBR, or the like, and is fitted into a fitting groove on the refill unit 10 side of the rubber holder 41. The seal rubber 43 has a Shore A hardness of 50 to 90, preferably from the viewpoints of adhesion to the ink containing tube 12 and the rubber holder 41, slidability, abrasion resistance, kinking resistance, creep resistance, and crack resistance. Set to 50-80.

  Further, the O-ring 44 is formed into an endless ring using elastic silicone rubber, NBR or the like, and is fitted into the fitting groove on the rotor 22 side of the rubber holder 41. The O-ring 44 has a Shore A hardness of 50 to 90, preferably from the viewpoint of adhesion to the rotor 22 and the rubber holder 41, slidability, abrasion resistance, kinking resistance, creep resistance, and crack resistance. Set to 50-80.

  Such an O-ring 44 is deformed and brought into close contact with the diameter-expanded surface 28 of the rotor 22 at the time of writing so that the outside air in the shaft body 1 cannot flow into the rotor 22, and from the pressurizing chamber 22 a of the rotor 22. The compressed outside air is caused to flow into the end portion of the ink containing tube 12. When not yet written, it faces the diameter-expanded surface 28 of the rotor 22 through a gap so that outside air can flow into the rotor 22.

  In the above configuration, when not writing with a fluid applicator, the diameter-expanded surface 28 of the rotor 22 and the O-ring 44 of the rubber holder 41 are separated from each other to form an outside air passage, so that the shaft body 1 And the pressurizing chamber 22a of the rotor 22 communicate with each other. Due to this communication action, the pressurizing chamber 22a of the rotor 22 and the ink containing tube 12 are not pressurized (see FIG. 1).

  Next, when writing using a fluid applicator, the crown 24 of the knock mechanism 20 is knocked and the knock bar 23 is slid. Then, the knock bar 23, the rotor 22 incorporating the pressurizing mechanism 40, and the refill unit 10 slide in the front direction of the shaft body 1, respectively. At the time of this sliding, the rubber holder 41 is in close contact with the end portion of the ink containing tube 12 via the seal rubber 43. However, the enlarged diameter surface 28 of the rotor 22 and the O-ring 44 of the rubber holder 41 are still separated from each other. Since it circulates, the inside of the shaft body 1 and the pressurizing chamber 22a of the rotor 22 communicate with each other.

  Next, the ink containing tube 12 gradually advances while compressing the return spring 21, and the writing portion 14 protrudes from the front portion of the shaft body 1, so that writing with the white pigment ink 11 is possible. At this time, when the front end portion of the ink containing tube 12 comes into contact with the front portion of the shaft main body 1 and stops, only the knock bar 23 and the rotor 22 incorporating the pressurizing mechanism 40 slide in the front direction of the shaft main body 1. Then, the diameter-expanded surface 28 of the rotor 22 and the O-ring 44 of the rubber holder 41 are in close contact with each other to block the flow of outside air, and the communication between the shaft body 1 and the rotor 22 is restricted and the pressurizing chamber 22a of the rotor 22 is restricted. Is in a sealed state capable of being pressurized.

  After the communication between the shaft main body 1 and the rotor 22 is restricted in this way, when only the rotor 22 containing the knock bar 23 and the pressurizing mechanism 40 slides further in the front portion direction of the shaft main body 1, the outside air in the pressurizing chamber 22a Is gradually pressurized, and the compressed outside air of the pressurizing chamber 22a flows into the end portion of the ink containing tube 12 through the rubber holder 41, and the internal pressure of the ink containing tube 12 increases (see FIG. 2).

  At this time, the rotor 22 is positioned forward of the plurality of strips 36 and is rotated at a predetermined angle, and the engagement claws 35 of the cam 34 and the engagement teeth 37 of the strips 36 are engaged with each other. The writing part 14 protruding from the front part of the head cannot be retracted.

  Next, when a sufficient amount of the white pigment ink 11 cannot be obtained as the white pigment ink 11 is consumed, the writing portion 14 is pressed against the writing surface to bring the ink containing tube 12 and the rotor 22 closer. Just do it.

  Then, the outside air in the pressurizing chamber 22a of the rotor 22 in which the ink containing tube 12 is retracted and fitted is pressurized, and the compressed outside air in the pressurizing chamber 22a passes through the rubber holder 41 to the end portion of the ink containing tube 12. As a result, the internal pressure of the ink containing tube 12 increases.

  Next, when the use of the fluid applicator is ended, the crown 24 of the knock mechanism 20 is knocked again and the knock bar 23 is slid. In this way, the fluid applicator is changed from the writing state of FIG. 2 by the return action of the compressed return spring 21 and the release of the engagement between the engagement claw 35 of the cam 34 and the engagement tooth 37 of the strip 36. 1 is restored to the unwritten state, and the pressurization of the ink containing tube 12 is released.

  When it is desired to replace the refill unit 10 of the fluid applicator, the rear shaft 4 is turned to separate the front shaft 2 and the rear shaft 4, and the used refill unit 10 is returned from the front shaft 2 together with the return spring 21. If removed, the refill unit 10 can be easily replaced.

  According to the above configuration, since the white pigment ink 11 contains titanium oxide, polymer hollow fine particles, a white pigment, and a gelling agent, precipitation of the white pigment can be extremely effectively suppressed and prevented. Further, since it is not necessary to enclose the pressurized gas when the ink containing tube 12 is pressurized, the manufacturing equipment can be simplified and the cost can be reduced.

  Further, since there is no need to constantly pressurize the ink containing tube 12, even if there is a problem with the sealability of the writing portion 14, there is very little possibility of causing ink leakage when not writing. In addition, when the white pigment ink 11 is consumed and it is desired to use the white pigment ink 11 effectively until the end, if the writing portion 14 is pressed against the writing surface and the ink containing tube 12 and the rotor 22 are brought close to each other, the addition is possible. The outside air in the pressure chamber 22a can be pressurized. Thereby, it is possible to sufficiently increase the pressure and effectively eliminate the possibility of causing ink leakage.

  In addition, when the user repeats the knocking operation regardless of writing due to play or the like, the ink containing tube 12 is pressurized or released every time the knocking operation is performed, so that the ink containing tube 12 is continuously applied. There is no pressure. Therefore, the problem that the white pigment ink 11 is ejected, the white pigment ink 11 is supplied more than necessary, and the flow rate adjustment of the white pigment ink 11 becomes difficult can be solved very effectively.

  Further, the pressurization mechanism 40 is supported by the rotor 22 of the knock mechanism 20, and the pressurization mechanism 40, the fitting member, the covering member, or the like is not integrally provided at the end portion of the refill unit 10, The refill unit 10 is remarkably inexpensive, and the replacement of the refill unit 10 can be greatly facilitated.

It is a partial section explanatory view showing the state at the time of unwritten in the embodiment of the fluid applicator concerning the present invention. It is a partial section explanatory view showing the state at the time of writing in the embodiment of the fluid applicator concerning the present invention. It is a fragmentary sectional view showing a refill unit in an embodiment of a fluid applicator according to the present invention. It is an expansion explanatory view showing the cam of the knock mechanism in the embodiment of the fluid applicator according to the present invention. It is explanatory drawing which shows the stripe body of the knock mechanism in embodiment of the fluid application tool which concerns on this invention. It is a section explanatory view showing a pressurization mechanism in an embodiment of a fluid applicator concerning the present invention.

Explanation of symbols

1 Shaft body 10 Refill unit 11 White pigment ink (fluid, pigment ink)
12 Ink storage tube (fluid storage tube)
13 Follower 14 Writing part (application part)
17 Tip 20 Knock mechanism 21 Return spring 22 Rotor (part of knock mechanism)
22a Pressurizing chamber 34 Cam 35 Engaging claw 36 Strip 37 Engaging tooth 40 Pressing mechanism 41 Rubber holder (holder)
43 Seal rubber 44 O-ring (sealing body)

Claims (4)

A fluid applicator comprising a hollow shaft main body and a refill unit accommodated in the shaft main body and capable of moving back and forth in the axial direction, and retracting the refill unit from a front opening of the shaft main body,
A knock mechanism provided in the shaft main body, and a pressurizing mechanism interposed between the refill unit and a part of the knock mechanism,
The refill unit is composed of a fluid storage tube filled with fluid and a coating part attached to the fluid storage tube and protruding from the front part of the shaft body at the time of application. Open,
A fluid applicator characterized in that a pressurizing mechanism is brought into contact with the end portion of the fluid containing tube, and the internal pressure of the fluid containing tube during application is increased by a part of the knock mechanism and the pressurizing mechanism. .   The fluid applicator according to claim 1, wherein the fluid in the fluid container tube is a pigment ink that includes at least a pigment and a gelling agent and requires pressure during application. The knock mechanism includes a return spring interposed between the shaft main body and the fluid storage tube, a substantially bottomed cylindrical rotor that is slidably fitted into the end of the fluid storage tube via a gap, and A plurality of cams formed at intervals on the outer surface of the rotor, and a plurality of strips formed at intervals on the inner surface rear portion of the shaft body,
Each cam is formed in a substantially linear strip in the axial direction of the rotor, and its end is inclined to the engaging claw, and each strip is directed in the axial direction of the shaft body and its tip is cut into engaging teeth. Chipping,
When applying, the rotor is rotated to engage the engaging claw of the cam and the engaging tooth of the strip, making the application part of the refill unit protruding from the front part of the shaft body unretractable, and rotating the rotor when not applying The engagement between the cam and the strip is released, each cam is positioned between the plurality of strips, and the application portion of the refill unit protruding from the front portion of the shaft body can be retracted. The fluid applicator as described.   The pressurizing mechanism is slidably fitted to the rotor of the knock mechanism via a pressurizing spring, and is attached to the holder and the substantially cylindrical holder that is opposed to the end portion of the fluid container tube. 4. A flow according to claim 3, comprising a hollow sealing body which is in close contact with the inner surface of the rotor and prevents gas from flowing into the rotor and allows gas to flow into the rotor away from the inner surface of the rotor when not applied. Body applicator.

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