JP2005225066A - Liquid applicator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid applicator which can supply an applied liquid to an application body by the writing pressure in writing, and can conduct an ink to the tip end in a short time at start of writing. <P>SOLUTION: The liquid applicator is equipped with a longitudinally movable application body, a valve mechanism part which is provided at the back of the application body and is opened all the time with the pressing force of a coil spring, and a main container which is provided at the back of the valve mechanism and houses an application liquid. The liquid applicator is provided with a first coil spring which works as a resistant force, when the valve mechanism opens so that an appropriate amount of the applied liquid can be supplied from the tip end side of the main body container to the application body side by the movement of the application body to the rear side by the writing pressure in writing, and is provided with a second coil spring which works with far more strong resistant force to the writing pressure, when the application body further retreats from the appropriate retreated state to open the valve mechanism wide. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a liquid applicator used as a writing instrument, a correction tool, or a cosmetic tool, in which a coating liquid such as ink or cosmetic liquid is built in the main body container, and the coating liquid flows out from the main body container to the application body side together with writing, The present invention relates to a liquid applicator provided with a valve mechanism for preventing outflow by releasing the writing pressure.

Shokai 57-171684 (Jokko Sho 61-12134) JP-A-6-286386 (Patent No. 3322717) In the writing instrument (applicator) of Patent Document 1, the valve part opens against the spring of the spring accompanying the writing, and the ink (application liquid) flows out, and the writing pressure is reduced. In a state where the valve portion is strongly opened and ink drops easily, it is shown that the valve portion is slidably contacted or brought into contact with the valve seat body to prevent ink from flowing out. However, it is not always stable that the ink in the main body container flows out to the coated body by the writing pressure at the time of writing, and there is a problem that the flow rate is excessive due to a strong writing pressure. By the way, in order to be able to write, it is necessary to conduct ink to the tip of the coated body, but this can greatly retreat the coated body, so the opening of the valve portion is large and the tip of the coated body is large. Ink can be conducted in a short time.

In addition, the writing instrument of Patent Document 2 uses a valve so that the spring pressure of the coil spring is substantially the same as the writing pressure at the time of writing, and an appropriate amount of ink is supplied to the tip side (applying body) to either the valve or the valve body. It is shown that a restricting portion for restricting the valve opening amount with respect to the valve is provided.
However, this can cause the ink in the main body container to flow out to the coated body by the writing pressure at the time of writing, there is no problem that the supply of ink is interrupted during writing, and a certain amount of ink can be stably supplied However, in order to enable writing, it is necessary to conduct ink to the tip of the coated body, and the valve portion is opened. The operation is performed at the time of manufacture or at the start of writing. However, since the valve opening amount suitable for writing is small, there is a problem that it takes time for the ink to pass. Further, since the backward movement of the application body is restricted, there is a possibility that the tip may be crushed or deformed when a strong writing pressure is applied, for example, when the application body is a soft body made of a fiber bundle or the like.

In order to solve the above-mentioned conventional problems, the present invention allows the coating liquid to flow out and be supplied to the coated body by the writing pressure at the time of writing. Makes it possible to conduct.
In addition, it is possible to prevent the tip of the coated body from being crushed or deformed even when a strong writing pressure or impact higher than the writing pressure adapted to writing is applied.

The present invention has the following configuration in order to achieve the above-described problems.
The liquid applicator according to the first aspect of the present invention includes an applicator that can move back and forth, a valve mechanism that is normally closed by a pressing force of a coil spring behind the applicator, and further behind the valve mechanism. In a liquid applicator provided with a main body container containing a coating liquid, the application body moves to the rear side by writing pressure during writing, and an appropriate amount of coating liquid can be supplied from the front end side of the main body container to the application body side. In this way, the first coil spring that acts as a drag when the valve mechanism opens, and a much stronger drag against the writing pressure when the applicator is further retracted from the retracted state and the valve mechanism opens largely. And a second coil spring that acts.

The liquid applicator is an applicator used as a writing instrument, a correction tool, or a cosmetic tool.
The coating liquid may be either water-based or oil-based, and the main body container containing the ink may be a part of the main body of the applicator, or a refill that can be replaced behind the valve mechanism. Is also possible. The main body container is closed at the rear end side. Further, when the rear end of the main body container is opened, it is possible to provide a stopper that can move following the rear end of the coating solution. Furthermore, as the coated body, a material in which the coating liquid is derived by capillary action is used for any of the bundles of fiber bundles, the sintered body of fine particles, and the porous molded body.

The liquid applicator of the present invention can flow and supply the coating liquid to the application body by the writing pressure at the time of writing. Also, in order to be able to start writing, it is necessary to keep the ink conducted to the tip of the application body, but the first coil that compresses and retracts the coil spring to an appropriate opening amount of the valve mechanism unit adapted for writing. By providing the spring and the second coil spring that is compressed and retracted by a pressure that is appropriately stronger than that, it is possible to cope with a short time with a strong pressure at the front end of the application body.
Furthermore, when a strong writing pressure higher than the writing pressure suitable for writing is applied, the coil spring is further compressed and retracted, so that there is no possibility that the tip of the coated body is crushed or deformed.

1 to 4 show an embodiment of a liquid applicator according to the present invention.
First, in FIG. 1, the coating liquid 9 contained in the main body container 1 is supplied to the coating body 7 through the valve mechanism unit 3, and the coating liquid 9 is conducted to the coating body 7 by capillary action and written (coating). A possible liquid applicator is shown.
In the present invention, the liquid applicator is a sign pen for writing aqueous or oil-based ink on the surface to be coated, a writing instrument such as a marker, or a white correction liquid is applied to the surface to be coated such as paper to correct typographical errors. For example, a correction tool or a cosmetic applicator using a fluid such as a cosmetic as a coating liquid is shown.
Moreover, although the main body container in which the coating liquid is incorporated is shown as a part of the applicator main body, it can also be mounted as a replaceable refill behind the valve mechanism. The main container is closed at the rear end, but the rear end of the main container is provided with a plug such as a grease-like or gel-like follower or silicone rubber that can move following the application liquid. It is also possible to make the end open.
Furthermore, as the coated body, a material in which the coating liquid is derived by capillary action is used for all of the bundles of fiber bundles, the sintered body of fine particles, and the porous molded body.

  2 and 4, when the front end of the application body 7 is pressed against the paper surface and the application body is pushed backward, the valve portion of the valve mechanism section 3 is opened and the application liquid 9 flows out to the application body side. Alternatively, a structure is shown in which the valve portion of the valve mechanism unit 3 is closed when the application body 7 is released from being pressed and the application liquid 9 is prevented from flowing out to the application body side.

  As shown in FIG. 2, the front shaft 2 is integrally provided with a valve body 3a behind the shaft portion 2a, and the side surface of the valve body 3a is hung from the front end to the rear end of the valve body at a required position. A window portion 3c is formed, a step portion 3d is formed in the middle of the rear portion of the inner hole portion, and a wall portion 3b having a hole at the center is formed at the rear end. The coating liquid 9 can flow into the valve body 3a from the rear end or side surface of the valve body 3a through the window 3c.

  On the other hand, the valve stem 4 is formed in a shaft shape, and a shaft portion 4a is formed in the rear via the step portion 4d, and a cylindrical holding portion 4b having a slightly larger diameter is formed in the front, and a hole portion of the holding portion 4b is formed. The rear end portion of the application body 7 is fixed to 4c. In addition, a protrusion 4e is formed at a predetermined position on the outer peripheral portion of the shaft portion 4a at the entire periphery or at a required location.

  In addition, the application body 7 is formed in a shaft shape, a rear portion 7b is formed on the rear side through the stepped portion 7c, and a front portion 7a having an appropriately large diameter is formed on the front side. Further, a tip of the front portion 7a is suitable for writing. The part is formed. The application body 7 is made of a material in which the application liquid is derived by capillary action, such as a bundle of fiber bundles as described above, a sintered body of fine particles, and a porous molded body.

  The second coil spring 12 is inserted from the rear end of the valve stem 4, and then the receiving ring 8 is inserted elastically over the protrusion 4e formed on the shaft portion 4a, and the rear end of the receiving ring 8 is protruded. The receiving ring 8 is prevented from retreating by contacting the front end of 4e. The receiving ring 8 is preferably a resin molded product so as to be elastically attached. In addition, it is desirable that the rear of the protrusion 4e be a slope. The receiving ring 8 is slidable with respect to the shaft portion 4e.

The valve stem 4 is inserted into the inner hole of the valve main body 3a from the front of the front shaft 2, and the rear end of the shaft portion 4a of the valve stem appropriately protrudes from the center hole of the wall 3b formed at the rear end of the valve main body. . At that time, a first coil spring 11 is laid between the inner surface side of the wall 3 b and the rear end of the receiving ring 8.
Next, a ring-shaped valve seat 6 made of an elastic material such as silicone rubber is mounted with the rear end in contact with the inner step portion 2b of the front shaft 2, and the inner peripheral portion of the front shaft of the outer peripheral portion of the valve seat Is made liquid-tight. Further, the front end 2 of the front shaft 2 is fixed to the front shaft inner hole by elastically engaging the concave and convex engaging portions provided in the crimping and mutual pipes. It is fixed in a state of being constricted at the step portion 7c of the front shaft and the rear end portion of the lip portion 5. The rear portion 7b of the application body 7 is mounted in the inner hole 4c of the holding portion at the front end of the valve rod 4, and the valve rod 4 moves back and forth in conjunction with the back and forth movement of the application body 7. Further, the front end of the valve stem 4 comes into close contact with the rear end surface of the valve seat 6 by the forward biasing force of the first coil spring 11.
By the way, the valve mechanism part 3 is comprised by the valve main body 3a, the valve rod 4, the 1st coil spring 11, the 2nd coil spring 12, the receiving ring 8, and the valve seat 6. FIG. Further, the opening amount of the valve mechanism is defined by the gap between the front end of the valve stem 4 and the rear end of the valve seat 6.
The liquid applicator of the present invention is configured by fixing the shaft portion 2a of the front shaft 2 in a liquid-tight manner to the front end hole of the main body container 1 in which the coating liquid 9 is contained. The assembly order described above is not limited.

(Function)
As for the 1st coil spring 11 and the 2nd coil spring 12, the winding part is fundamentally formed by equal pitch, and the end winding part which is not compressed is formed in both ends as needed. Moreover, in order to prevent the entanglement of the spring, an end turn part may be provided at a key part of the intermediate part.
The first coil spring 11 is a weak spring that is urged to be compressed with a pressure equivalent to the writing pressure, while the second coil spring 12 is a pressure much stronger than the writing pressure. A spring biased to compress.
When the front end of the application body 7 is pressed against the paper surface or the like with a writing pressure to write or apply characters, the application body 7 moves backward against the urging force of the first coil spring 11, and the valve stem 4 The coating liquid 9 is supplied to the application body 7 through the opening A defined by the gap between the front end of the valve seat 6 and the rear end of the valve seat 6. At that time, the rear end of the receiving ring 8 comes into contact with the stepped portion 3d of the valve body 3a to prevent the applying body 7 from retreating against the writing pressure.
Moreover, the problem that the coating liquid drops is avoided. In this state, the second coil spring 12 is basically not compressed. (See Figure 3)

From this state, when the application body 7 is moved backward by a stronger pressure, the second coil spring 12 is compressed and a large opening B is formed. (See Figure 4)
Therefore, in order to be able to start writing, it is necessary to conduct ink to the tip of the application body. However, since the opening amount of the valve mechanism portion increases, the application liquid can be conducted to the application body in a short time. It becomes possible. Furthermore, when a strong writing pressure higher than the writing pressure is applied, the coil spring is further compressed and retracted so that the tip of the applying body is crushed or deformed as if it was forcibly prevented from moving backward. There is no fear of it.

(About other embodiments)
In the above-described embodiment, the valve main body 3a is integrally formed behind the front shaft 2. However, the valve main body 3a can be provided so as to be joined to each other. At that time, the tip portion 5 can be integrated with the tip shaft.
In addition, an elastic member such as silicone rubber is selected as the valve seat 6, but it goes without saying that other elastic bodies or resin members may be used. Further, the close contact surface between the valve stem front end and the valve seat rear end can be tapered.
Further, the rear end portion of the application body 7 is fixed to the hole 4c at the front end of the valve stem 4, but the application body and the valve stem are interlocked by bringing the rear end of the application body into contact with the front end of the valve stem. It is also possible to provide it.

It is a longitudinal section showing the whole liquid applicator which is an embodiment of the present invention. It is sectional drawing which shows the writing front end part of the liquid applicator which is embodiment, and has shown the state which the valve mechanism part closed. The application body is pressed by the writing pressure, and the valve mechanism portion is appropriately opened. The application body is strongly pressed, and the valve mechanism portion is greatly opened.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body container 2 Lead shaft 2a Shaft part 2b Inner step part 3 Valve mechanism part 3a Valve main body 3b Wall part 3c Window part 3d Step part 4 Valve rod 4a Shaft part 4b Holding part 4c Hole part 4d Step part 4e Projection 5 Tip part 6 Valve seat 7 Application body 7a Front portion 7b Rear portion 7c Step portion 8 Receiving ring 9 Coating liquid 10 Tail plug 11 First coil spring 12 Second coil spring A Opening portion B Opening portion

Claims (1)

Liquid applicator comprising an applicator that can be moved back and forth, a valve mechanism that is normally closed by a pressing force of a coil spring behind the applicator, and a main body container that contains the application liquid behind the valve mechanism In
The liquid applicator acts as a drag when the valve mechanism opens so that the applicator moves rearward due to the writing pressure during writing so that an appropriate amount of application liquid can be supplied to the applicator from the front end side of the main body container. And a second coil spring that acts with a much stronger resistance against the writing pressure when the applied body is further retracted from a state in which the application body has been retracted to an appropriate size and the valve mechanism opens greatly. A liquid applicator characterized by comprising:

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