JP4193729B2 - Pressure applicator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pressurizing type painting utensil, the dispersion or the like of pressurizing force due to that of parts of which is suppressed as small as possible by stabilizing the position of a pressurizing mechanism. <P>SOLUTION: By energizing rearwards a cylinder member as the pressurizing mechanism with a coiled spring or a rebounding elastic member arranged between the cylinder member and a housing, the rearward motion of the cylinder at the release of an advancing operation is realized, resulting in the communication of the interior of a cylinder chamber with outside air. <P>COPYRIGHT: (C)2005,JPO&amp;NCIPI

Description

  The present invention includes an applicator main body in which an application destination is connected directly or via a connecting member to the tip of the coating liquid tank in the exterior body, and air in the coating liquid tank by a relative forward movement with respect to the coating liquid tank. The present invention relates to a pressurizing applicator that contains at least a pressurizing mechanism that compresses and presses a coating liquid to assist in discharging the coating liquid from a coating destination.

  In the case of an applicator containing ink using a pigment with a heavy specific gravity such as titanium oxide as the coating solution, the pigment may settle and clog, or a preferred writing line may not be obtained. There are known correction fluids that are used after the container is shaken well to stir the ink. However, as ink that does not require such user stirring work, the fluidity of the ink itself is lowered, and the pigment has a high viscosity. It is known that the sedimentation of the water is suppressed as much as possible. However, such high-viscosity ink is difficult to pass through a fine ink passage such as a pen tip, and it is difficult to obtain a necessary discharge amount such as a correction liquid that is applied to writing or especially to typographical characters. In some cases, ink discharge is supported by pressure. In addition, even if it is an ink that does not use a composition with a heavy specific gravity, it can be used for high viscosity application, such as when you want to get a raised handwriting or when using a high viscosity paste as a coating liquid. It is applicable also to what uses a liquid.

Japanese Patent Application Laid-Open No. 2004-009645 (Patent Document 1) discloses a writing instrument having a pressure structure for supporting ink ejection, and a pen tip protruding and retracting mechanism by operating the operation unit at the rear end of the writing instrument. There has been disclosed a pressure-type writing instrument provided with means for pressing the inside of the ink tank by retreating the ink tank connected to the pen tip by pressing against the surface.
Japanese Patent Laid-Open No. 2000-335173 (Patent Document 2) discloses a refill unit in which a pressure pumping mechanism is fixed to a rear end portion of a refill, and the refill unit is pressurized by operating the pressure pumping mechanism by a knocking operation. A pressure-type writing instrument for assisting ink ejection is disclosed.
JP 2004009645 A JP 2000-335173 A

In each of the above-described conventional techniques, the volume of the air chamber communicating with the outside air is compressed in a state in which the communication with the outside air is blocked by the forward operation of the pressure member, and the discharge of the coating liquid is not supported. When the forward operation is released, the air chamber is opened again to the atmosphere, and the pressure member is retracted by the repulsive force of the coil spring interposed between the coating liquid tank and the initial state is restored. .
However, in the case where the pressurizing member is retracted against the coating liquid tank, the pressure operation for gripping the exterior body is not stable unless the position of the pressurization member with respect to the exterior body is strictly controlled, In particular, there were concerns about variations among products in mass production. In the case of a retractable writing instrument as described in the above-mentioned patent document, a refill having a coating liquid tank is composed of a coil spring sandwiched between the refill and the exterior body, a refill and a pressurizing mechanism. It becomes a state suspended by coil springs sandwiched between them, and it is necessary to strictly adjust the balance of repulsive force of each coil spring, especially in the case where the rear end of the refill is in contact with the coil springing, The possibility of the pen tip retreating at the time of writing was unwieldy.

That is, the present invention includes an applicator main body in which an application destination is connected directly to the tip of the coating liquid tank or via a connecting member in the exterior body, and a relative advance movement relative to the coating liquid tank. In a pressurizing applicator that contains at least a pressurizing mechanism that compresses air and presses the coating liquid and assists in discharging the coating liquid from the coating destination, the pressurizing mechanism has a circumferential contact with the outer wall of the coating liquid tank. The cylinder chamber is defined by a contact portion and a bottom portion, and the circumferential contact portion is a cylinder member that can slide back and forth while circumferentially contacting the outer wall of the coating liquid tank. The gist of the present invention is a pressure applicator that moves the cylinder member backward when the forward movement of the cylinder member that compresses the air in the coating liquid tank is released by urging the exterior body with a coil spring.

  The pressure-type writing instrument of the present invention resists the pressurizing member against the exterior body, so that the position relative to the exterior body is stable, and can be supplied with a stable pressure even in mass production. Even when the applicator is of the type, the position of the applicator body and refill will be stable, and in addition to obtaining a stable pressure, the pen tip protrusion length and the possibility of pen tip retraction during application It is enough that it can be eliminated.

  Since the exterior body is a part to be gripped by the hand when using the applicator, and is a base for the press operation and the pen tip operation, the container is basically not expected to be deformed. It is preferable that a synthetic resin injection-molded product or a metal product can be suitably used. In particular, when it is desired to make the internal structure and the coating solution visible, it is made of a synthetic resin having transparency. Moreover, it may be composed of a plurality of components such as a front shaft and a rear shaft, or may be a soft grip feeling by placing an elastomer in a portion to be gripped. When using a retractable writing instrument, the locking part of the applicator main body will be provided directly or indirectly, but repeatedly locking the front and rear positions by the rotation of the rotor sliding by operation, In the so-called rotary cam structure, the rotor sliding lock groove may be formed directly on the inner wall of the exterior body.

  The applicator main body has a coating destination member connected to the tip of a coating liquid tank that stores the coating liquid. The application destination is at least from a ball holder that rotatably holds a ball as a writing member. What has what is called a ball-point pen-tip structure can be used conveniently. That is, the ball-point pen tip can manage the discharge and non-discharge of the coating liquid by the contact between the ball and the ball holder, and in particular, a coil spring that urges the ball forward is inserted inside the ball holder. By doing so, when not in use, the ball can be pressed against the inner edge of the opening of the ball holder to restrict the discharge / leakage of the coating liquid. As the coating solution tank, an extruded product of a synthetic resin such as polypropylene, which is appropriately cut into a length, can be suitably used, but a metal pipe or the like may be used. In the coating solution tank, along with coating solutions such as ink, correction solution, and paste solution, slide stoppers such as gel substances and solids are placed at the rear end interface of the coating solution to efficiently apply pressure to the coating solution. Can be arranged.

  The pressurization mechanism is a mechanism that further introduces air into the space in the coating liquid tank to form a pressurized state, but applies pressure while sealing the space in the coating liquid tank during forward operation of the pressurization mechanism. In the state where the pressurizing mechanism maintains the forward position, the state where pressure is applied is maintained as long as the coating liquid is not consumed, the forward position lock is released, and the coil spring interposed between the exterior body and the rear is attached. When returning to the state before the forward operation, the air passage communicating with the atmosphere is formed with respect to the coating liquid tank. The forward pressurizing operation of the pressurizing mechanism can be interlocked with the application tip protruding operation in the case of the above-described retractable writing instrument, or the applicator main body is fixed to the exterior body and the exterior body is fixed. In addition, the operation part of the pressurizing mechanism may be exposed.

An example will be described based on the drawings.
The example of FIGS. 1-3 is an example at the time of setting it as the retractable writing instrument using what is called a rotation cam mechanism which repeats locking of the front-back position by rotation of the rotor which slides by operation. The exterior body is basically composed of three members including a front shaft 1, a middle shaft 2, and a rear shaft 3. The front shaft 1 having a pen tip protruding hole 1 a is a pen tip holder of a refill 5 having a pen tip 4. The refill 5 is urged backward by interposing a first coil spring 7 between the first coil spring 7 and the first coil spring 7. The middle shaft 2 has a front small-diameter portion 2a inserted into the front shaft 1, and an elastic band 2b made of an elastomer serving as a grip portion is attached to the outside. The front side small diameter portion 2 a is in contact with the pen tip holder 6 to restrict the refill 5 from retreating. The rear end of the middle shaft 2 is also a rear small diameter portion 2c inserted into the rear shaft 3, and a second coil spring 8 is interposed between the rear end portion and the pressurizing mechanism, so that the pressurizing mechanism Is energized backward. The refill 5 is provided with a pen tip 4 that is a ballpoint pen tip, a pen tip holder 6 and an ink tank 9 at the tip. The refill 5 is arranged in layers inside the ink tank 9 in contact with the high viscosity pigment ink 10 and the ink interface. A gel-like slide stopper 11 is accommodated. The rear part of the ink tank 9 is located in the rear shaft 3. These front shaft 1, middle shaft 2, and rear shaft 3 may be formed integrally with each other, or the remaining amount of ink 10 in the ink tank 9 is visually recognized by improving the visibility of the refill 5. It can also be formed of a transparent material as possible.

  As shown in FIG. 2 which is an enlarged view of a main part, a cylinder member 12 which is a pressurizing mechanism covers a rear part of the ink tank 9. The cylinder member 12 includes an annular spring receiver 12b, a cylinder main body 12c, and a packing 12d sandwiched between them, and the packing 12d is in sliding contact with the outer wall of the ink tank in an airtight manner. The possible inner diameter. The cylinder body 12c has a locking projection 12e on the outer wall, and is slidably fitted in a cam groove 14b formed on the inner wall of the cam cylinder 14 having a clip 14a fixed to the rear end of the rear shaft 3. It has become. The rear end of the cylinder body 12c is in contact with the front end of the operation member 13 protruding from the rear end of the rear shaft 3 so that the inclined uneven portions 12f and 13a are engaged with each other. 13 and cam cylinder 14 correspond to the rotor, slider and cam cylinder of the rotating cam mechanism, respectively.

The operation will be described with reference to FIG. 2 which is an enlarged view of the main part of FIG. 1 and FIG. 3 which is an operation explanatory diagram.
In the state shown in FIGS. 1 and 2 where the pen tip 4 is immersed in the front shaft 1, the packing 12d is not in contact with the ink tank 9, and the cylinder chamber 12a is indicated by an arrow. It is in the state where air circulation with outside air is possible in the passage shown. In this state, the locking projection 12 e of the cylinder member 12 that is also a rotor is located in the long groove of the cam cylinder 14. When the operation member 13 is operated and moved forward, the cylinder member 12 is also moved in conjunction therewith, and the packing 12d comes into contact with the ink tank 9 in a circumferential shape, thereby closing the cylinder chamber 12a. When the operation member 13 is further advanced, the packing 12d grips the ink tank 9, and the refill 5 is also advanced. When the gripping force of the packing 12d is defeated by the repulsive force of the first coil spring 7 or the first coil spring 7 is fully contracted, the pen tip 4 protrudes from the pen tip discharge hole 1a of the tip shaft 1 and is refilled. 5 is stopped, but the packing 12d moves forward while sliding in contact with the outer wall of the ink tank 9, and the cylinder member 12 moves relatively closer to the ink tank 9, so that the capacity of the cylinder chamber 12a is increased. Is reduced, and the air in the cylinder chamber 12a is pushed into the ink tank 9 and becomes a pressure for urging the slide stopper 11 forward.
The forward regulation of the refill 5 may be performed when a part of the pen tip holder 6 or the ink tank 9 is brought into contact with the inner peripheral surface of the tip shaft 1.

Thereafter, when the locking projection 12e of the cylinder member 12 reaches the tip of the long groove, it is guided by the repulsive force of the second coil spring 8 and moves to the adjacent short groove, and is locked at the advanced position of the cylinder member 12. However, at this time, the rear end of the ink tank 9 is in contact with the bottom of the cylinder chamber 12a, and the refill 5 is prevented from moving backward.
In this state, the ink 10 in the ink tank 9 is in a pressurized state while maintaining the state where the pen tip 4 of the refill 5 protrudes from the pen tip protrusion hole 1 a of the tip shaft 1. When ink is applied to the writing surface, ink is ejected by pressure.

  When the operation member 13 is advanced again, the locking projection 12e of the cylinder member 12 is guided to the long groove adjacent to the short groove of the cam cylinder 14, and the cylinder member 12 is moved backward by the repulsive force of the second coil spring. The refill 5 is moved backward until it comes into contact with the tip of the middle shaft 2 and the pen nib 4 is immersed, the cylinder member 12 is further moved, the connection between the cylinder member 12 and the ink tank 9 is released, and the cylinder chamber 12a. Is again in communication with the atmosphere.

4 and 5 show another example. It is shown as a figure corresponding to the above-mentioned FIG. 2 and FIG.
The difference from the above example is that the cylinder member 12 ′ is not a member that also serves as a rotor, but a member that slides with the ink tank 9, and a rotor 15 is provided separately to determine the front and rear positions of the cylinder member 12 ′. It is what.

  The cylinder member 12 ′ of this example does not communicate with the atmosphere in the cylinder chamber 12 a ′ when the packing is separated from the ink tank 9, and the first packing 12 d ′ is always in the forward and backward movement range of the cylinder member 12 ′. It is in sliding contact with the outer wall of 9 in an airtight manner. At the rear end portion of the cylinder member 12 ', a concave portion 16 of the rotor receiver and a vent hole 17 communicating therewith are formed. A third coil spring 18 that repels the cylinder member 12 ′ and the rotor 15 in a direction separating the cylinder member 12 ′ and the rotor 15 is interposed between the cylinder member 12 ′ and the rotor 15. The rotor 15 has a convex portion 15a that comes into contact with the cylinder member 12 'at the front end, and a second packing 19 that is in airtight contact with the cylinder member 12' is disposed around the rotor 15.

  As the operating member 13 advances, the rotor 15 advances along the cam groove, and the convex portion 15a and the second packing 19 come into contact with the cylinder member 12 'to advance the cylinder member. The cylinder chamber 12 a ′ is sealed when the second packing 19 abuts on the cylinder member 12 ′, and further the cylinder chamber 12 ′ moves forward so that the first packing 12 d ′ slides on the outer wall of the ink tank 9. Advancing and reducing the volume of the cylinder chamber 12a ′ to apply pressure to the inside of the ink tank 9. With the pen tip protruding, the protrusion of the rotor 15 moves to the adjacent short cam groove to lock the pen tip and form a state in which pressurized ink can be used for writing.

  When the operating member 13 is operated again and the protrusion of the rotor 15 moves to the long cam groove, the rotor 15 is retracted prior to the refill 5 by the third coil spring 18, and the vent hole 17 of the cylinder member 12 'is opened. Then, the cylinder chamber 12a ′ is again communicated with the atmosphere. Next, the cylinder member 12 ′ is moved rearward by the second coil spring 8, and the refill 5 is also retracted to return to the pen tip 4 immersive state.

The longitudinal cross-sectional view which shows an example. The I section enlarged vertical sectional view of FIG. The expanded sectional view explaining operation of Drawing 2. The figure equivalent to FIG. 2 which shows another example. FIG. 5 is an enlarged sectional view for explaining the operation of FIG. 4.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lead shaft 1a Pen tip protrusion hole 2 Middle shaft 2a Front side small diameter part 2b Elastic band 2c Rear side small diameter part 3 Rear shaft 4 Pen tip 5 Refill 6 Pen tip holder 7 First coil spring 8 Second coil spring 9 Ink tank 10 Ink 11 Slide plug 12 Cylinder member 12a Cylinder chamber 12b Annular spring holder 12c Cylinder body 12d Packing 12e Locking projection 12f Inclined uneven part 13 Operation member 13a Inclined uneven part 14 Cam cylinder 14a Clip 14b Cam groove 12 'Cylinder member 12a 'Cylinder chamber 12d' First packing 15a Convex part 15 Rotor 16 Concave part 17 Vent hole 18 Third coil spring 19 Second packing

Claims (4)

In the exterior body, the applicator main body, which is connected to the tip of the coating liquid tank directly or via a connecting member, and the air in the coating liquid tank are compressed and applied by a relative forward movement with respect to the coating liquid tank. In a pressurizing applicator that contains at least a pressurizing mechanism that presses the liquid and assists in discharging the coating liquid from the application destination, the pressurizing mechanism is formed by a circumferential contact portion and a bottom portion of the coating liquid tank against the outer wall The cylinder member has a partitioned cylinder chamber, and the circumferential contact portion is a cylinder member that can slide back and forth while circumferentially contacting the outer wall of the coating liquid tank . The cylinder member is attached to the exterior body by a repulsive coil spring. A pressurizing applicator that urges the cylinder member backward to move the cylinder member backward when releasing the forward position locking of the cylinder member that compresses the air in the coating liquid tank. Either the sliding member, the applicator main body, or the member connected thereto is locked to the outer body or the locking portion of the member fixed to the outer body by the advancement of the sliding member capable of interlocking with the applicator main body. The pressurization-type applicator according to claim 1, wherein the application position of the applicator main body forms a forward position locking state in which the application destination protrudes from the exterior body. The pressure application according to claim 2, wherein the member that is locked to the exterior body or the locking portion of the member that is fixed to the exterior body by the advancement of the sliding member is the cylinder member or a member that is fixed to the cylinder member. Ingredients. Either the sliding member, the applicator main body, or the member connected thereto is locked to the outer body or the locking portion of the member fixed to the outer body by the advancement of the sliding member capable of interlocking with the applicator main body. 4. The pressure applicator according to claim 2, wherein the cylinder member is inelastically brought into contact with the applicator main body inelastically in a state where the applicator main body is retracted to restrict retraction of the applicator main body. 5.

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