JP2019147282A - Liquid discharge tool - Google Patents

Abstract

To obtain a liquid discharge tool which can temporarily apply pressure on and discharge liquid without being affected by the change of liquid amount inside the body and with which a user can adjust the outflow amount of liquid.SOLUTION: A liquid discharge tool 1 discharges liquid 8 contained inside a discharge tool body 2 from a tip hole 60a provided on the front. On the discharge tool body 1 are provided a front storage part 30 and a rear storage part 40 which store the liquid 8, on the front storage part 30 is provided a tip member 6 with the tip hole 60a in a back and forth moveable manner, between the tip member 6 and the front storage part 30 is provided an airtight part 3 which encapsulates the liquid 8, between the front storage part 30 and the rear storage part 40 is provided a resistance part 50 which generates resistance against the flow of the liquid 8, and between the tip member 6 and the resistance part 50 is provided a resilient member 7 which springs the tip member 6 forward.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a liquid ejection tool.

Conventionally, it is widely known that a liquid is allowed to flow out from a tip hole provided in front of the main body, such as a writing instrument such as a ballpoint pen or a marker, or an applicator such as a pen-type correction liquid or liquid glue. Structures that can increase the amount of spillage are also known.
For example, in a writing instrument, as disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 2000-335173), a pressure mechanism is provided behind the ink storage tube, and the inside of the ink tank is pressurized in conjunction with the pressing operation of the knock body. As in Patent Document 2 (Japanese Patent Laid-Open No. 2017-119406), by using a structure that pressurizes the inside of the ink tank using the writing pressure at the time of writing, the amount of ink flowing out from the pen tip is increased, It is considered to make the handwriting thicker or darker.
In the applicator, as in the patent document (Japanese Patent Laid-Open No. 9-290598), the side surface of the flexible container is pressed to pressurize the inside, thereby causing the correction liquid to flow at the tip of the chip and the like. It has a structure that is applied to the liquid and is used as a correction fluid to correct typographical errors.

JP 2000-335173 A JP 2017-119406 A Japanese Patent Laid-Open No. 9-290598

However, in the writing instruments of Patent Document 1 and Patent Document 2, since the pressurization by the pressurizing mechanism is a structure that pressurizes the air layer behind the ink accommodated in the ink tank, When the amount of ink in the tank decreases, the volume of compressed air becomes larger and it becomes difficult to apply pressure, resulting in a change in the outflow amount due to the difference in the remaining ink amount. there were.
Moreover, in the writing instrument of the said patent document 1 and the patent document 2, in the pressurization state, the ink which always applied the pressure at the time of writing will be forcedly discharged, and a user controls the outflow amount of ink. It was not considered to be able to adjust.

  Moreover, in the applicator of Patent Document 3, for example, in the case of a pen-type correction liquid, the amount of correction liquid outflow is likely to change due to the force of the user pushing the side of the container during pressurization. When it is necessary to push the container, the finger may get tired. Further, in a liquid paste in which a liquid paste is accommodated in a flexible container, the liquid paste is excessively produced when the container is pushed too much, and the paper may be twisted by the moisture.

  An object of the present invention is to provide a liquid ejection tool that can temporarily pressurize and eject a liquid without being affected by a change in the amount of liquid inside the main body, and can adjust the outflow amount of the liquid by a user. Is to get.

The present invention
“1. A liquid discharger that discharges the liquid contained in the inside of the main body of the discharger from a front end hole provided at the front,
The discharge tool body is provided with a front storage portion and a rear storage portion for storing the liquid,
A tip member having the tip hole is disposed in the front housing portion so as to be movable back and forth.
An airtight portion that encloses the liquid is provided between the tip member and the front housing portion,
Between the front accommodating part and the rear accommodating part, a resistance part that provides resistance to the flow of the liquid is provided,
A liquid ejection tool, wherein a resilient member is disposed between the tip member and the resistance portion so that the tip member is resiliently forwarded.
2. A contact body that contacts the paper surface on the tip member, a holding body that has the tip hole and the contact body is held in the tip hole, and the contact body that is disposed inside the holding body. 2. The liquid ejection tool as set forth in claim 1, further comprising: a bullet body that is bulleted forward to closely contact the holding body.
3. In the rear housing part, a follower that comes into contact with the rear part of the liquid and moves forward as the liquid decreases and regulates the backward movement of the liquid is disposed so as to be in close contact with the rear housing part,
Along with the backward movement of the rear surface of the liquid due to the backward movement of the leading member, at least a part of the follower is displaced backward,
3. The liquid ejecting device according to claim 1, wherein the follower is restored as the rear surface of the liquid is advanced by the advance of the tip member.
4). 4. The liquid ejection tool according to item 3, wherein the follower is a grease-like liquid stopper using polybutene or silicon as a base oil. Is.

  The liquid ejection tool according to the present invention presses and moves the liquid in the front housing portion backward by retreating the tip member when the tip member is brought into contact with the coated surface such as a paper surface at the time of writing or coating. Although the force works, the movement of the liquid to the rear is restricted by the resistance portion provided between the front housing portion and the rear housing portion, so that the liquid in the front housing portion is discharged from the tip hole of the front member. It is a structure.

By adopting the structure of the present invention, in the writing instrument, when the pen tip, which is the tip member, is pressed against the paper surface, pressure is applied to the ink in the front housing portion, and the amount of ink flowing out from the pen tip is temporarily increased. It is possible to make the handwriting thicker or darker. At this time, the writing instrument according to the invention structure of the present invention is different from the pressurizing mechanism in the conventional pressurizing-type writing instrument, and has a structure that makes it easy to discharge by applying pressure directly to the ink without pressurizing the air behind the ink. Therefore, it is possible to temporarily increase the outflow amount of the liquid without being affected by the amount of ink accommodated inside.
In addition, even in an applicator such as a correction pen or liquid glue, the outflow amount can be temporarily increased as necessary, and even when the dried coating liquid adheres to the tip hole of the tip member, By pressing the tip member against the paper surface, the coating liquid can be pressurized and easily flowed out.
In addition, when the stamp surface is formed of a penetrating material and used for a penetrating stamp in which ink is contained in the main body, it becomes possible to deepen the imprint.

  It is necessary that the inside of the front housing portion, the inside of the resistance portion, and the inside of the rear housing portion communicate with each other so that the liquid can flow through each other.

Examples of the tip member in the present invention include a pen body such as a ballpoint pen tip or a felt tip in the case of a writing instrument, and a resin tip or a sponge in the case of an applicator.
For example, in the case of a writing instrument, the discharge tool body is a cylindrical shaft cylinder that contains ink, and in the case of an applicator tool, it is a container that contains correction liquid or liquid glue, but its shape and dimensions are limited. is not.

The force when the tip member moves backward against the elastic force of the bullet member, that is, the operating load when the tip member is retracted when the discharge tool body is pressed toward the paper surface, etc. In the case of a writing instrument, it is preferably set between 1.0 N and 5.0 N. If it is set to be smaller than 1.0 N, the tip member will be retracted and a large amount of ink will flow out even if the user does not intend to increase the writing pressure. Even if the user intends to increase the writing pressure, it is difficult for the tip member to move backward, and it is difficult for a large amount of ink to flow out.
The operating load is necessary for retracting the tip member, such as the resilience of the resilient member, the frictional force of the close contact portion provided between the tip member and the front accommodating portion, and the resistance force when ink flows. It is the sum of the powers.
When the structure of the present invention is employed in a writing instrument, it is possible to inflate the handwriting by the writing pressure and by the distance by which the tip member is retracted.

  The resilient member disposed between the tip member and the resistance portion has a resilience that causes the tip member to retract when the tip is pressed against the paper surface, and to advance the tip member when the pressure is released. Coil spring etc. The material is preferably made of stainless steel so as not to be corroded by the liquid. When the coil spring is used as a resilient member, the resilient force is preferably 0.5N to 4.5N.

  The moving distance by which the tip member moves backward is related to the amount of the pressurized liquid that flows out. For the purpose of using the writing instrument and the correction pen, the moving amount is preferably in the range of 0.1 mm to 1 mm. In an applicator such as liquid glue whose amount is to be increased, the retraction amount is preferably in the range of 0.5 mm to 5 mm.

  The airtight part provided between the front member and the front housing part is configured such that the liquid in the front housing part is attached to the side surface of the front member by attaching an elastomeric O-ring to the outer side surface of the front member or the inner side surface of the front housing part. Therefore, it shall not leak forward.

The resistance portion provided between the front housing portion and the rear housing portion is formed, for example, by forming a wall between the front housing portion and the rear housing portion, and the wall is inclined so that the rear is narrower than the front. Orifice-shaped holes may be provided, or crank-shaped holes may be provided in which vertical holes separated into front and rear are connected by horizontal holes. The mode for generating the flow resistance of the liquid, such as the cross-sectional dimension and the length dimension of the hole, or the surface roughness of the inner surface, may be set in consideration of the viscosity of the liquid contained in the discharge tool body.
In addition, the resistance portion is provided with a member that becomes a flow resistance when a liquid passes through the inside, such as a fiber converging body or a ceramic having fine through holes extending in the front-rear direction, between the front accommodation portion and the rear accommodation portion. May be.

  Further, the tip member has an abutting body that abuts against the paper surface, a holding body that has a tip hole and the abutting body is held in the tip hole, and is disposed inside the holding body so that the abutting body is placed in front. By providing a projectile body that is ejected in close contact with the tip member main body, the abutment body can be brought into close contact with the tip member main body so that airtightness can be obtained. Even when the internal pressure becomes negative, outside air can be prevented from being sucked into the front housing portion from the tip hole, and the liquid in the rear housing portion can flow into the front housing portion and be used next time. In this case, the ink can be filled in the front housing portion. Specifically, when the tip member is a ballpoint pen tip, the ball becomes the contact body.

Furthermore, a follower that regulates the backward movement of the liquid behind the liquid is arranged inside the discharge tool main body, and with the backward movement of the rear surface of the liquid due to the backward movement of the leading member, at least a part of the follower is displaced backward, When the liquid in the front housing part is suddenly pressurized when the front member is pressed against the paper surface, etc. by restoring the follower with the advance of the liquid rear surface by the advance of the front member. However, a part of the liquid in the front housing part can pass through the resistance part and move to the rear housing part, and at least a part of the follower is displaced rearward as the amount of liquid in the rear housing part increases, As a result, the pressurized coating liquid can be prevented from being ejected vigorously from the tip hole of the tip member.
In addition, when the tip member is separated from the paper surface or the like, the displacement of at least a part of the follower is restored by moving and reducing a part of the liquid in the rear container again into the front container. It is possible to prevent negative pressure in the front housing portion and the rear housing portion.
In order to displace a part of the follower to the rear as the liquid in the rear housing part increases, the follower is formed as a grease-like liquid stopper such as polybutene or silicon, and the outer peripheral surface of the follower is housed in the rear. When the liquid in the rear housing part increases, the center part of the follower may be displaced so as to bulge rearward. In this case, although the outer peripheral surface of the grease-like follower is in contact with the inner surface of the rear housing portion, the rearward movement is restricted, but the center portion of the follower does not touch the rear housing portion, The follower swells as the escape space for the increased amount of liquid in the container, and the follower when the liquid in the rear container is reduced is restored by moving only the center part swelled backward without moving the outer peripheral surface. Is done. However, in this case, the entire follower including the outer peripheral surface is advanced by the amount of liquid flowing out from the tip hole of the tip member.
The follower may be formed by applying grease such as polybutene or silicon on the outer surface of a resin-molded piece member without forming the whole with a liquid stopper. In this case, when the liquid in the rear housing portion increases, the resin-molded piece member moves rearward in a state where the grease portion of the follower contacts the inner surface of the rear housing portion and the rearward movement is restricted. When the liquid is displaced and the liquid in the rear housing portion is reduced, the outer peripheral surface of the follower is not moved, and the piece member displaced rearward is advanced and restored.

  According to the present invention, it is possible to temporarily pressurize and discharge a liquid without being affected by a change in the amount of liquid inside the main body, and the user can adjust the outflow amount of the liquid. Can be obtained.

It is a longitudinal cross-sectional view which shows the ball-point pen of this embodiment. FIG. 1 is an enlarged view of a main part. It is a principal part enlarged view in use condition.

Next, the present invention will be described with reference to the drawings, but the present invention is not limited to the following examples. In this embodiment, a ballpoint pen that is a writing instrument will be described. However, the present invention can be applied to a writing instrument such as a marker or a fountain pen, an applicator such as a correction pen or liquid glue, or a penetrating stamp.
In the present embodiment, the one with the pen tip is expressed as the front, and the opposite side is expressed as the rear. In order to make the explanation easy to understand, the same reference numerals are given to the same members and the same parts in the drawings.

  As shown in FIGS. 1 and 2, the ballpoint pen 1 of the present embodiment includes a shaft cylinder 2, a front cylinder 3 that is open at the front and rear, a rear cylinder 4 that is open at the front and closed at the rear, the front cylinder 3, and the rear The connecting cylinder 5 is connected to the cylinder 4. A front housing portion 30 is provided inside the front shaft 3, and a rear housing portion 40 is provided inside the rear cylinder 4.

  The connecting cylinder 5 is formed with a flange part 5a protruding outward at an intermediate part, and the rear end face of the front cylinder 3 and the front end face of the rear cylinder 4 are brought into contact with the flange part 5a. Further, the connecting cylinder 5 is a wall between the front cylinder 3 and the rear cylinder 4, but an orifice hole 50 is provided inward so as to be narrowed toward the rear with respect to the front, and the front accommodating portion 30. And the rear housing part 40 are in communication.

  A ballpoint pen tip 6 that can be moved back and forth along the axis is inserted in front of the front tube 3. The ball-point pen tip 6 holds the ball 61 in the tip hole 60 a of the ball holding body 60, and the rear part of the ball holding body 60 is inserted into the sliding cylinder 62 and formed at the intermediate portion of the outer surface of the sliding cylinder 62. The front end edge of the O-ring 63 is brought into contact with the flange 62a, and the cylindrical rear cylinder 64 is fitted to the rear of the sliding cylinder 62 so that the front end of the rear cylinder 64 is brought into contact with the O-ring 63. The outer surface of the O-ring 63 is in close contact with the inner surface of the front housing portion 30 to form an airtight portion.

  In the present embodiment, an elastic body 65 having a coil portion 65a at the rear and a shaft portion 65b at the front is disposed inside the ball holding body 60, and the rear end of the coil portion 65a is held by the ball. The ball 61 is brought into close contact with the inner surface of the front end of the ball holding body 6 by the elastic force of the elastic body 65. Thus, the tip hole 60 a is blocked by the ball 61.

  A coil spring 7 is disposed as a resilient member between the ball-point pen tip 6 and the connecting cylinder 5 so that the ball-point pen tip 6 is always ejected forward. The ball-point pen tip 6 is used as a retaining member by bringing the flange 62 a of the sliding cylinder 62 into contact with an inner flange 3 a formed at the front end of the front cylinder 3.

The front accommodating portion 30 and the rear accommodating portion 40 are filled with ink 8 having shear thinning viscosity. Behind the rear accommodating portion 40, a grease-like follower 9 that follows the consumption of the ink 8 is disposed at the rear of the ink 8. It is provided so as to be in close contact with.
The ink 8 is also filled in the inner orifice hole 50 of the connecting cylinder 5, and when the ink 8a in the front accommodating portion 30 is reduced by writing, the ink 8b in the orifice hole 50 is moved forward in front. The ink 8c in the rear container 40 flows forward and then flows into the container 30.

Next, the use state of the ball-point pen 1 of this embodiment is demonstrated using FIG.
The ball-point pen 1 can perform writing by bringing the ball 61 into contact with the paper surface 100 to open the tip hole 60 a closed by the ball 61. This is because when the ball 61 is brought into contact with the paper surface 100, the ball 61 retreats against the elastic force of the elastic body 65, and a gap generated between the outer surface of the ball 61 and the inner surface of the tip hole 60a. This is because the ink 8 can flow out.
At this time, when a certain amount of writing pressure is applied, the ball-point pen tip 6 moves backward against the elastic force of the coil spring 7.

In the present embodiment, when the ball 61 of the ball-point pen tip 6 is in contact with the paper surface, when the force that presses the shaft tube 2 toward the paper surface, that is, the writing pressure becomes 1.0 N or more, the ball-point pen tip 6. Is set to move backward against the resilient force of the coil spring 7. When the ball-point pen tip 6 is retracted, as shown in FIG. 3, the volume in the front storage portion 30 decreases and the ink 8a tends to move backward. At this time, the ink 8a is moved to the front storage portion. It is necessary to pass through the orifice hole 50 at the rear of the nozzle 30, and since the orifice hole 50 has a gradient so that the rear becomes narrower than the front, the ink flow resistance is generated, and as a result, the ink 8 a in a state where pressure is applied is obtained. Then, the ink 8d in the ball-point pen tip 6 is pushed to eject the ink 8 from the tip hole 60a.
Therefore, the ballpoint pen 1 of the present embodiment allows the ink 8 to flow out more than during normal writing by increasing the writing pressure and retracting the ballpoint tip 6, and the handwriting can be thickened or darkened. Become.
In the ballpoint pen 1 of the present embodiment, the inner diameter of the front housing part 30 is 4 mm, and the inner diameter of the rear end housing part 40 is 4.3 mm. The orifice hole 50 has a front end with an inner diameter of φ1 mm, a rear end with an inner diameter of 0.25 mm, a longitudinal length of 8.4 mm, and a gradient of 2.9 degrees with respect to the axis, so that the diameter gradually decreases. I made it.
The viscosity of the ink 8 was 1000 mPa · s at a temperature of 20 ° C. and a shear rate of 3.84 sec ⁻¹ .
In a state in which the ballpoint pen tip 6 is retracted to the maximum, that is, in a state in which the coil spring 7 is completely compressed, the ballpoint pen tip 6 is retracted 0.4 mm, and the volume of the front receiving portion 30 is reduced by about 5 mm ³ to apply pressure. 8a can be discharged.

  The ballpoint pen 1 of this embodiment can push the ballpoint tip 6 against the paper surface 100 to retract the ballpoint tip 6 and apply pressure directly to the ink 8 to temporarily increase the outflow amount. Since the volume of the front accommodating portion 30 is reduced in accordance with the amount of retraction 6, the outflow amount of the ink 8 is changed, the handwriting can be thickened or darkened, and the handwriting can be inflated.

  Further, even when the ink 8a in the front housing part 30 is suddenly pressurized by applying the pen pressure vigorously, a part of the ink 8a in the front housing part 30 passes through the orifice hole 50 and moves backward. Since the ink 8c in the rear container 40 is increased, the central part 9a of the follower 9 is displaced so as to bulge rearward, so that the ink 8 is discharged from the tip hole 60a of the ballpoint pen tip 6. It is prevented that the ink is discharged vigorously. In addition, when the ball-point pen tip 6 is separated from the paper surface 100, a part of the ink 8c in the rear storage unit 40 moves again into the front storage unit 30 and decreases, to the rear of the central portion 9a of the follower 9. This displacement is restored so that the inside of the front housing part 30 and the rear housing part 40 do not become negative pressure.

In addition, when the writing pressure is released, the tip hole 60a of the ballpoint pen tip 6 is elastic even if the force of the coil spring 7 increases the volume of the front housing portion 30 and the negative pressure is applied. The ball 65 is closed by the elastic force of the projecting body 65, and the outer surface of the ballpoint pen tip 6 and the inner surface of the front tube 3 are hermetically sealed by the O-ring 63. It is possible to prevent air from being sucked into the front housing portion 30 from the front of the front.
The follower 9 of the present embodiment is a liquid stopper made of polybutene as a base oil. By bringing the outer peripheral surface 9b of the follower 9 into close contact with the inner surface of the rear housing portion 40, the ink 8 in the rear housing portion 40 increases and the rear surface Even when 80 moves backward, the position of the outer peripheral surface 9b does not change. However, when the ink 8 flows out from the tip hole 60a and the ink 8 is reduced, the follower 9 including the outer peripheral surface 9b is driven to move forward by the rear surface 80 of the ink 8.

1 ... Ballpoint pen (liquid ejector),
2. Shaft cylinder (discharge tool body),
3 ... Front cylinder, 3a ... Inner collar, 30 ... Front housing part, 4 ... Rear cylinder, 40 ... Rear housing part,
5 ... connecting cylinder, 5a ... collar, 50 ... orifice hole (resistor),
6 ... Ball-point pen tip (tip member), 60 ... Ball holder, 60a ... Tip hole, 60b ... Inner stage, 61 ... Ball (contact body), 62 ... Sliding cylinder, 62a ... Flange, 63 ... O-ring, 64 ... rear cylinder, 65 ... bullet, 65a ... coil, 65b ... shaft,
7: Coil spring (elastic member),
8 ... ink (liquid),
8a ... Ink in the front housing part, 8b ... Ink in the orifice hole, 8c ... Ink in the rear housing part, 8d ... Ink in the ballpoint pen tip,
9 ... follower, 9a ... central part, 9b ... outer peripheral surface,
100 ... paper.

Claims (4)

A liquid discharge tool for discharging the liquid contained in the inside of the discharge tool body from the front end hole provided in the front,
The discharge tool body is provided with a front storage portion and a rear storage portion for storing the liquid,
A tip member having the tip hole is disposed in the front housing portion so as to be movable back and forth.
An airtight portion that encloses the liquid is provided between the tip member and the front housing portion,
Between the front accommodating part and the rear accommodating part, a resistance part that provides resistance to the flow of the liquid is provided,
A liquid ejection tool, wherein a resilient member is disposed between the tip member and the resistance portion so that the tip member is resiliently forwarded.   A contact body that contacts the paper surface on the tip member, a holding body that has the tip hole and the contact body is held in the tip hole, and the contact body that is disposed inside the holding body. The liquid ejecting device according to claim 1, further comprising: a projecting body that is ejected forward to closely contact the holding body. In the rear housing part, a follower that comes into contact with the rear part of the liquid and moves forward as the liquid decreases and regulates the backward movement of the liquid is disposed so as to be in close contact with the rear housing part,
Along with the backward movement of the rear surface of the liquid due to the backward movement of the leading member, at least a part of the follower is displaced backward,
The liquid ejecting device according to claim 1, wherein the follower is restored as the rear surface of the liquid is advanced by the advance of the tip member.   The liquid ejector according to claim 3, wherein the follower is a grease-like liquid stopper using polybutene or silicon as a base oil.

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