JP2001063277A - Liquid applicator - Google Patents

Abstract

(57) [Abstract] (with correction) [PROBLEMS] To reliably prevent the occurrence of blurring or DC application failure in a coating liquid such as ink or cosmetics, and to obtain a stable liquid coating performance. Provide a liquid applicator. SOLUTION: An ink holding section 30 in a collector 20 is provided.
Is composed of a plurality of wing-shaped retaining plates 31 arranged in a comb shape at a desired interval D in the axial direction, and the ink slits 3 that can communicate with the outside air across the respective wing-shaped retaining plates 31.
2 is provided in the axial direction, and the opening end 32a of the ink slit 32 on the collector rear end surface 20b side is communicated with the gap A between the inner peripheral surface of the cylindrical projection 16 and the relay core 23 via the gap B. A gap A is provided between the rear end 23b of the relay core 23 and the inner peripheral surface 17a of the communication hole 17 of the cylindrical projection 16.
Is set to 0.02 mm ≦ A ≦ 0.25 mm, and the ink is based on water and has a viscosity of 12 mPa · s at 25 ° C.
s or less.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid applicator such as a writing implement such as a felt-tip pen or a makeup implement such as an eyebrow brush, and more particularly to a stable supply of ink (also referred to as ink) to a pen core. The present invention relates to a cartridge-replaceable liquid applicator that can be performed by performing the above operation.

[0002]

2. Description of the Related Art Conventionally, in a pen used as an applicator, for example, as a writing instrument, for example, Japanese Utility Model Laid-open No.
As disclosed in Japanese Patent Application Laid-Open No. 776, there is a printer having a configuration in which ink can be replaced with a cartridge.

[0003] In this type of cartridge exchangeable writing implement,
As shown in FIG. 8, a main body 100 is attached to a front shaft 101, and a rear shaft 1 is detachably screwed to and mounted on the front shaft 101.
The inside of the front shaft 101 is divided into a front end tube portion 104 and a rear end tube portion 105 via a partition wall 103.

[0004] A cylindrical projection 106 is provided on the center axis of the rear end cylindrical portion 105 of the front shaft 101, and the cylindrical projection 106 is provided at the front end of a replaceable cartridge 400 containing the ink W. Is mounted in a detachable manner, and a seal ball receiving portion 401 provided on the front end opening side of the cartridge 400 is provided.
The ink W in the cartridge 400 is released from the cylindrical protrusion 106 by releasing the sealing of the seal ball 402 which is plugged through the cylindrical protrusion 106.
Is introduced into the communication hole 107.

[0005] A seal cylinder 108 is provided at the distal end of the distal end cylindrical portion 104 of the front shaft 101.
The collector 200 is inserted into the distal end cylindrical portion 104 via the. The collector 200 is held between the inner peripheral surface 104 a of the distal end cylindrical portion 104 in a loosely fitted state so as to be able to communicate with the outside air.
There is provided a communication hole 201 which is in contact with and communicates with 07.

[0006] Further, a pen core 202 is provided with a communication hole 20 in a mouth plug (holder) 200a on the tip side of the collector 200.
The rear end face 200b of the collector 200 is brought into contact with the partition wall 103 in the front shaft 101 and the communication hole 201 is formed.
The tip 203a of the relay core 203 inserted into the pen core 2
02, while the rear end 20 of the relay core 203 is
3b is inserted in a loose fit state with a gap A over the communication hole 107 side of the cylindrical projection 106 formed on the rear end cylindrical portion 105 side of the front shaft 101, whereby the communication hole 10 of the cylindrical projection 106 is formed.
7, the ink W in the cartridge 400 introduced into the communication hole 201 of the collector 200 is penetrated and supplied to the pen core 202 through the relay core 203.

Further, an ink storage section 300 is provided on the outer peripheral body of the collector 200, and the ink storage section 300 is arranged in a comb shape at a desired interval D in the axial direction. A plurality of wing-shaped holding plates 301 are provided, and ink slits 302 that can communicate with the outside air are provided between the respective wing-shaped holding plates 301 in the axial direction, and openings of the ink slits 302 on the collector rear end face 200b side are provided. The end 302a communicates with the communication hole 107 of the cylindrical projection 106 with a gap B therebetween.

That is, this gap B is
By communicating the ink slit 302 formed in the outer peripheral body of the cylindrical projection 106 with the communication hole 107 of the cylindrical projection 106,
For example, a change in internal pressure acting on the cartridge 400 due to a temperature increase due to the body temperature of a finger gripping the barrel main body 100 during writing is absorbed, and the excess ink W that tends to overflow due to such internal pressure change is temporarily removed. To prevent the ink W from overflowing from the distal end side of the distal end tubular portion 104.

[0009]

By the way, in a writing instrument of the type in which the ink slit of the collector is in direct contact with the ink flowing out of the ink storage section (cartridge), the size of the ink slit is limited to the air and the ink. This is an important factor in maintaining the balance of the replacement, but the cylindrical projection (106) of the front shaft fits into the cartridge as in the above-mentioned writing implement, and the gap directly in contact with the ink is the gap between the relay core and the inner circumference of the cylindrical projection. In the case of a writing instrument having a gap A formed between the surface and the surface, the writing performance is determined by the relationship between the gap A and the physical properties of the ink, particularly the viscosity.

The gap A serves as a place for replacing air in the collector with ink in the cartridge (ink storage unit).
The ease of replacement depends on the size of the gap. During normal writing, ink is transferred from the pen core to a writing object such as paper, and the ink of the cartridge is supplied to the pen core via the relay core. When the ink in the cartridge is pulled and moved by the capillary force of the relay core, the inside of the cartridge is depressurized, and the gap A displaces the ink and the air that has entered from the collector. Is eliminated, and the designed outflow amount of normal ink is determined.

However, when the gap A is narrow, the gap A
If the replacement of air and ink becomes difficult, the replacement does not occur unless the pressure reduction of the cartridge becomes extremely large for replacement, and if the pressure reduction state of the cartridge is not eliminated,
The degree of decompression increases, preventing the ink in the cartridge from being drawn out by the capillary force of the relay core, thinning the writing line and causing poor writing such as blurring. Also, when the viscosity of the ink is high, the speed of air replacement at the time of writing slows down, causing blurring.

On the other hand, the gap A prevents the ink from dripping from the pen core at the time of writing due to the surface tension due to the interface between the ink and the air in the gap A when the pen core is facing downward, simultaneously with the air replacement. In addition, it prevents and stabilizes an increase in a writing flow rate and leakage (DC) of ink from a pen core.

However, when the size of the gap A is large, air and ink are easily replaced, so that writing failure such as blurring does not occur when writing is used. C, a 7-day DC test was performed to evaluate whether or not the ink leaked from the pen core. When the temperature increased, the surface tension of the ink decreased, and the ability to hold the ink in the gap A became weaker. Leakage or DC occurs.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is possible to reliably prevent a coating liquid such as an ink or a cosmetic from causing a coating failure or a DC coating defect, thereby obtaining a stable liquid coating performance. It is an object of the present invention to provide an applicator capable of performing such an operation.

[0015]

In order to solve the above-mentioned problems, the present invention has the following arrangement. According to the present invention, a barrel body is formed by a front shaft and a rear shaft detachably attached to the front shaft, and a front barrel portion and a rear barrel portion are formed inside the front shaft of the barrel body via a partition wall. And the surface of the partition wall in the front shaft on the side of the distal end cylindrical portion is formed as a stepped concave portion that is recessed at the center from the peripheral portion, and is spaced axially (D) on the outer peripheral body portion. A liquid conducting slit having a predetermined width (C) is formed in the plurality of arranged storage plates in the axial direction between the respective storage plates,
A collector for temporarily holding the coating liquid through the liquid conducting slit is formed within the interval, and the collector is inserted into the distal end cylindrical portion so that an outer peripheral portion of the collector can communicate with the outside air. The rear end surface of the collector is brought into contact with the concave portion to form a first gap (B) between the rear end surface and the center of the concave portion. In the portion, a relay core is inserted, and a communication hole that does not directly conduct to the liquid conduction slit is formed, and an application body that is joined to the distal end portion of the relay core is held in an application body holder that is continuous with the tip of the collector. A cylindrical projection having a communication hole in which the rear end of the relay core straddles the communication hole of the collector and is inserted with a second gap (A) provided in the rear end cylindrical portion; Exchangeable with application liquid stored in the shape of a protrusion The cartridge is detachably loaded with the distal end thereof, so that the application liquid in the cartridge can be supplied to the application body side via the relay core, while the coating liquid between the inner wall of the cylindrical projection and the relay core is provided. An applicator in which the second gap (A) is set to 0.02 mm by communicating the two gaps, the first gap, and the liquid conducting slit so as to temporarily hold the application liquid in the gap between the collector storage plates. ≦ A ≦ 0.25mm
And the coating liquid is based on water and has a viscosity of 2
A liquid applicator characterized in that the liquid is 12 mPa · s or less at 5 ° C.

That is, in the liquid applicator according to the present invention, by employing the above configuration, the contact surface of the partition wall in the front shaft with which the rear end surface of the collector abuts is stepped on the concave portion, A second gap between the inner periphery of the cylindrical projection and the relay core via a first gap between the contact surface of the partition wall and the rear end face of the collector at the concave portion; Is connected to the conductive slit provided in the axial direction, so that the coating liquid in the cartridge can be temporarily stored in the interval between the storage plates of the collector. Further, the second gap A is set to 0.02 mm ≦ A
≦ 0.25 mm and its viscosity at 25 ° C. is 12 mPa
Since s or less, when the application of the liquid progresses and the inside of the cartridge is depressurized, the ink and the air can be smoothly replaced, and the depressurization in the cartridge can be quickly eliminated. Therefore, it is possible to eliminate writing and application defects such as blurred writing lines. In addition, even if the viscosity is low with an aqueous coating liquid, the liquid does not flow directly if the second gap is set as described above, and the liquid is good.

[0017]

FIG. 1 is a block diagram showing an embodiment of the present invention.
7 will be described in detail with reference to the drawings shown in FIG. FIG. 1 shows an embodiment of the entire configuration of a writing instrument such as a cartridge exchangeable marker pen or felt-tip pen according to the present invention.

In the writing instrument shown in FIG. 1, reference numeral 1 denotes a barrel body, and the barrel body 1 has a tip shaft (pen tip shaft) 11 to which a cap 50 is detachably attached, and a screw on the tip shaft 11. Rear shaft (pen rear shaft) 12 that is detachably mounted in the combined state
And formed.

As shown in FIG. 2, the inside of the front shaft 11 is
3 are divided into a front end tube portion 14 and a rear end tube portion 15,
The surface of the partition 13 in the front shaft 11 on the side of the distal end cylindrical portion 14 is formed as a stepped concave portion 19 which is recessed at the center from the peripheral edge. A cylindrical projection 16 is provided on a central axis in the rear end cylindrical portion 15.
The tip of a replaceable cartridge 40 containing an ink W (also referred to as raw ink) containing a pigment or the like is detachably loaded therein, and a seal ball receiving portion 41 provided on the tip opening side of the cartridge 40 is provided. The ink W in the cartridge 40 is introduced into the communication hole 17 of the cylindrical projection 16 by releasing the sealing of the sealing ball 42 which is sealed via the opening.

A seal cylinder 18 is provided at the distal end of the distal end cylindrical portion 14 of the front shaft 11, and a collector 20 is inserted into the distal end cylindrical portion 14 via the seal cylinder 18. The collector 20 is held between the inner peripheral surface 14a of the distal end cylindrical portion 14 in a loosely fit state so as to be able to communicate with the outside air. A communication hole 21 for communication is provided, and a pen core 22 is inserted and held in a tip side portion of the communication hole 21 in an opening plug 20 a forming a front end side of the collector 20.
2 is a front end 2 of the relay core 23 inserted into the communication hole 21.
3a is joined.

Further, the rear end face 20b of the collector 20
Makes a gap B (corresponding to a first gap) between the rear end face 20b and the concave face 19 by abutting against the concave face 19 of the partition wall 13 in the front shaft 11, and the gap B and the width C With the ink slit (liquid conducting slit) 32 of the first embodiment. At the same time, the rear end 23b of the relay core 23 closely inserted into the communication hole 21 straddles the communication hole 17 of the cylindrical projection 16 formed on the rear end cylinder 15 of the front shaft 11, and the gap (second A) and inserted in a loose fit state. As a result, the cartridge 40, which is led out from the communication hole 17 of the cylindrical projection 16 to the communication hole 21 side of the collector 20 via the relay core 23,
The ink W inside is penetrated and supplied to the pen core 22 side.

Further, an ink retaining section 30 is provided on the outer peripheral body of the collector 20, and the ink retaining section 30 is arranged in a comb shape at a desired interval D in the axial direction. A plurality of wing-shaped retaining plates 31 are provided, and an ink slit 32 is provided in the axial direction that can communicate with the outside air across the respective wing-shaped retaining plates 31, and the ink slit 32 is provided on the collector rear end face 20b side. Open end 3
2a is connected to the inner peripheral surface of the cylindrical projection 16 and the relay core 23 via the gap B.
Is communicated with the gap A.

That is, the gap B is formed, for example, by communicating the ink slit 32 having a width C formed in the outer peripheral body of the collector 20 with the gap A between the inner circumference of the cylindrical projection 16 and the relay core 23. During writing, the excess ink W, which tends to overflow due to a change in internal pressure acting on the cartridge 40 due to a temperature rise due to the body temperature of the finger gripping the barrel main body 1, can be temporarily held in the collector 20, whereby The ink W is prevented from overflowing from the distal end side of the distal end cylindrical portion 14.

The contact surface 13a of the partition wall 13 in the front shaft 11 with which the rear end surface 20b of the collector 20 contacts is shown in FIG.
As shown in FIG. 5, a concave portion 19 is formed with a step, and a gap B is formed between the contact surface 13a of the partition wall 13 and the rear end surface 20b of the collector 20 by the concave portion 19. By being formed corresponding to the opening end 32a, the ink slit 32 and the cylindrical protrusion 1
The gap A between the inner periphery 6 and the relay core 23 communicates with each other. Note that a plurality of concave grooves 33 extending radially in the axial outer radial direction are provided in the concave portion 19 formed stepwise on the contact surface 13 a of the partition wall 13 in the front shaft 11. Further, the inner peripheral surface 17a of the communication hole 17 of the cylindrical projection 16 provided on the rear end cylindrical portion 15 side of the front shaft 11 into which the rear end 23b of the relay core 23 is inserted.
6 and 7, a plurality of ribs 34 are formed in the circumferential direction of the shaft, and the rear end 23b of the relay core 23 is connected to the communication hole of the cylindrical projection 16 by each of the ribs 34. 17 is held with a gap A between the inner peripheral surface 17a and the inner peripheral surface 17a. A gap A is provided between the rear end 23b of the relay core 23 and the inner peripheral surface 17a of the communication hole 17 of the cylindrical projection 16.
Is set to 0.02 mm ≦ A ≦ 0.25 mm. The ink is based on water and has a viscosity of 1 at 25 ° C.
It is an aqueous ink of 2 mPa · s or less.

In the writing implement of the embodiment, the ink to be used is accommodated in the cartridge 40. The size of the gap A and the viscosity of the ink are variously set and evaluated. Good results have been obtained with aqueous inks. The evaluation tests performed are described below.

First, the ink viscosity was set to 6 mPa · s at 25 ° C.
Evaluation tests were performed on writing implements having various gap A dimensions using the water-based ink. The test results are shown in the following table.

[0027]

[Table 1]

As can be seen from the test results, the gap A is equal to 0.
A good evaluation was obtained for writing blur at 02 mm or more,
The ink direct current was good at 0.25 mm or less. From this, as described above, the gap A is 0.02 mm
It is understood that it is appropriate to set the size range of ≦ A ≦ 0.25 mm. Further, since a very good evaluation was obtained in the “writing blur evaluation”, the gap A was 0.05 mm.
It is more preferable to set ≦ A ≦ 0.25 mm.

When the ink viscosity increases, the ink flow to the pen core is reduced by the capillary force of the relay core of the ink, so that the ink flow becomes poor, and writing blur tends to occur. Therefore, when the gap A was small, it was confirmed that there was no problem, and the results in the following table were obtained.

[0030]

[Table 2]

From these results, the viscosity was 12 mP at 25 ° C.
It was confirmed that the problem of writing blurring did not occur if it was less than a · s.

From the above, the gap A is 0.02 m
It has been found that by setting the dimension range of m ≦ A ≦ 0.25 mm, it is possible to design a writing instrument having good writing properties.

In the above-described embodiment, a writing instrument such as a felt-tip pen has been described as an example. However, the present invention is not limited to this, and can be applied to a cosmetic applicator such as eyebrow drawing. . In addition, it goes without saying that the present invention can be variously modified and implemented without departing from the gist of the present invention.

[0034]

As is evident from the above description, according to the present invention, the coating performance such as writing blur due to the thinning of the drawing line and the writing performance without liquid DC is improved, and the stable coating liquid is obtained. Supply performance can be obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an embodiment of the entire configuration of a felt-tip pen according to the present invention.

FIG. 2 is an enlarged sectional view of a main part in a state where a cap is removed.

FIG. 3 is an enlarged sectional view of the front shaft.

FIG. 4 is a sectional view of the partition wall of the front shaft as viewed from the direction of arrows II in FIG. 3;

FIG. 5 is an enlarged sectional view of a main portion of a partition wall portion of the front shaft.

FIG. 6 is an enlarged sectional view of a main part of the cylindrical projection as viewed from the direction of arrows II-II in FIG. 3;

7 is a cross-sectional view of a main part of the cylindrical projection as viewed from the direction of arrows III-III in FIG. 6;

FIG. 8 is a sectional view showing an example of a conventional felt-tip pen.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Shaft cylinder main body 11 Front shaft 12 Rear shaft 13 Partition wall 13a Contact surface 14 Front cylindrical portion 14a Inner peripheral surface 15 Rear end cylindrical portion 16 Cylindrical projection 17 Communication hole 17a Inner peripheral surface 18 Seal cylinder 19 Concave surface 20 Collector 20a Port Plastic (tip) 20b rear end face 21 communication hole 22 pen core 23 relay core 23a front end 23b rear end 30 ink storing part 31 wing-like storing plate 32 ink slit 32a open end 33 concave groove 34 rib 40 cartridge 41 seal ball receiving part 42 seal ball A gap between inner peripheral surface of communication hole of cylindrical projection and outer periphery of rear end of relay core D interval of wing-shaped retaining plate B gap between collector rear end surface and contact surface of partition wall C liquid conduction slit Width W ink

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Shigeki Oba 1091 Tateishi, Fujioka-shi, Gunma F-term in Gunma R & D Center, Mitsubishi Pencil Co., Ltd. (Reference) 2C350 GA04 KA03 KA09 KA09 KC05 NA07 NA10

Claims (1)

[Claims] 1. A barrel body is formed by a front shaft and a rear shaft detachably mounted on the front shaft, and a front end barrel portion and a rear end barrel are formed inside the front shaft of the barrel body via a partition wall. The surface of the partition wall in the front shaft on the side of the distal end cylindrical portion is formed as a stepped concave portion that is recessed at the center from the peripheral edge, and is spaced axially (D) on the outer peripheral trunk portion. A liquid conducting slit of a predetermined width (C) is formed in the plurality of storage plates arranged in the axial direction between the respective retaining plates, and the coating liquid is temporarily passed through the liquid conducting slit within the space. The collector is inserted into the distal end cylindrical portion so that the outer peripheral portion of the collector can communicate with the outside air, and the inserted rear end surface of the collector is brought into contact with the concave surface portion to form the collector. A first gap (B) is formed between the first gap (B) and the center of the concave portion, and the first gap and the liquid conducting slit are connected to each other. A relay core is inserted into the central portion of the collector, and a communication hole that does not directly conduct the liquid through the slit is formed in the central portion of the collector. A cylindrical projection having a communication hole in which the rear end of the relay core straddles the communication hole of the collector and is inserted with a second gap (A) in the rear end cylindrical portion. The tip of a replaceable cartridge containing the coating liquid is detachably loaded in the cylindrical projection, and the coating liquid in the cartridge can be supplied to the coating body via the relay core. On the other hand, the second gap between the inner wall of the cylindrical protrusion and the relay core, the first gap, and the liquid conduction slit communicate with each other, so that the coating liquid can be temporarily held in the gap between the collector storage plates. An applicator, the second gap The A) and 0.02 mm ≦ A ≦ 0.25 mm, and the coating liquid is based on water, the viscosity of 25 ° C
Liquid applicator characterized in that the liquid applicator is a liquid of 12 mPa · s or less.