JP2003025787A - Coater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low cost coater which simplifies a structure of a mold for molding a coating liquid reservoir member in the member having a plurality of air replacing holes to deal with an abrupt pressure change, which facilitates mold releasing of a molding and which improves a yield. SOLUTION: The coater such as, for example, a writing instrument comprises an ink reservoir member 16 having an ink tank 18, first air replacing holes 40 connected to a center slit 28 formed at a part of the member 16 oppose to the tank 18, and second air replacing holes 44 connected to an air groove 42 of the member 16 and provided separately from the first holes 10.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an ink, a correction liquid,
In applicators that apply various coating liquids such as cosmetics to the target from the coating part (including writing implements that write ink from the writing part to the target), the outer circumference of the induction core that guides the coating liquid in the tank to the writing part A plurality of sheet-shaped bodies are arranged in the portion with a gap in the guiding core axis direction, and a center slit is formed in each of the sheet-shaped bodies in the guiding core axis direction. .

[0002]

2. Description of the Related Art Conventionally, a writing implement, which is an example of an applicator, has a plurality of sheets in the outer periphery of an induction core that guides the ink in an ink tank to the writing part, with gaps (grooves) in the axial direction of the induction core. An ink reservoir member (also referred to as a collector) having comb-shaped ink reservoir portions arranged in parallel is provided in various writing instruments such as a direct liquid type. A writing instrument having this ink reservoir member temporarily stores the ink in the ink tank in the groove between the sheets of the ink reservoir when the internal pressure in the ink tank changes due to temperature changes or atmospheric pressure changes in the outside air. It has the function of accumulating.

[0003]

DISCLOSURE OF THE INVENTION Here, in a conventional applicator such as a writing instrument having a temporary coating liquid reservoir,
In order to cope with a sudden pressure change in the tank, there is an idea that a plurality of air replacement holes connecting the tank and the coating liquid reservoir member are formed to increase the air replacement portion to enable smooth air replacement. However, in the conventional coating liquid reservoir member having a plurality of air replacement holes, it is usual that the plurality of air replacement holes are connected to the center slit, and thus, the plurality of air replacement holes are all connected to the center slit. In terms of the structure, the structure of the injection-molding die becomes complicated, so that there is a problem that it becomes difficult to remove the molded product from the mold and the yield is deteriorated.

The present invention has been made in view of the above-mentioned problems of the prior art, and in a coating liquid reservoir member having a plurality of air displacement holes in order to cope with a sudden pressure change, the coating liquid reservoir member is molded. An object of the present invention is to provide an applicator that simplifies the structure of a die, facilitates die cutting of a molded product, improves yield, and improves cost.

[0005]

The present invention has the following constitution in order to achieve the above object. The present invention, a plurality of sheets are arranged in the outer peripheral portion of the induction core for guiding the coating liquid in the tank to the coating portion with a gap in the direction of the induction core axis, and each sheet is arranged in the direction of the induction core axis. It is a coating liquid reservoir member having a center slit, and the coating liquid is allowed to flow into and out of the groove portion between the sheet bodies through the center slit according to the pressure change in the tank to temporarily store the coating liquid. In an applicator having a coating liquid reservoir member exhibiting a function, a first air displacement hole connected to a center slit is formed in a portion of the coating liquid reservoir member facing the inside of the tank, and
The applicator is characterized in that a second air replacement hole connected to the air groove of the coating liquid reservoir is provided separately from the air replacement hole. According to the present invention, a first air displacement hole connected to the center slit is formed in a portion of the coating liquid reservoir member facing the inside of the tank, and the coating liquid reservoir is provided separately from the first air displacement hole. Since the second air replacement hole connected to the air groove of the member is provided, it is possible to improve the air replacement capacity by providing a plurality of air replacement holes and sufficiently cope with a sudden pressure fluctuation in the tank. . Also, the second air replacement hole is the first
Since it is not connected to the center slit separately from the air replacement hole, the air replacement hole can be provided in addition to the first air replacement hole without complicating the mold structure. Therefore,
Since the air can be smoothly replaced in the tank with a simple structure without making the mold structure complicated, and the coating liquid can quickly flow into and out of the coating liquid storage member, the performance of the coating liquid storage member can be improved.

In the present invention, it is preferable that the second air replacement hole is an air replacement hole having a groove width substantially equal to that of the first air replacement hole. By doing this, the first
The air replacement hole and the second air replacement hole exert the same capillary force so that the air replacement can be performed in each air replacement hole without excess or deficiency. Further, it is preferable that one or more second air replacement holes are formed on both sides of the first air replacement hole. With this configuration, the plurality of air replacement holes can be arranged in a well-balanced manner when viewed in the cross section of the coating liquid reservoir member, and the air replacement holes can be replaced even more and more. Further, when the coating liquid reservoir member is viewed in cross section, the center slit and the first air replacement hole are formed in the same direction and at the same position, and the second air replacement hole is parallel to the first air replacement hole. It is preferably formed. By doing this, in releasing the resin-molded coating liquid reservoir member from the injection mold, the mold is released in the direction along the center slit formed along the radial direction of the coating liquid reservoir member, Since the second air replacement hole is parallel to the center slit and the first air replacement hole, the mold can be released easily.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. 1 is an overall vertical cross-sectional view of a writing instrument (an example of an applicator) according to an embodiment of the present invention, and FIG.
An enlarged cross-sectional view of the main part around the rear part of the ink fountain member of the writing instrument of
3 is a sectional view taken along the line AA of FIG. 2, and FIG. 4 is a sectional view taken along the line BB of FIG.

As shown in FIG. 1, in the writing instrument according to the embodiment, the user grips the outer peripheral surface of the barrel 10 during writing and the writing portion 12
The tip of the pen core 14 is slid on a target surface such as a sheet surface, and ink is supplied and applied from the pen core 14 to the target surface for writing. The shaft cylinder 10 is a substantially cylindrical body having a front end opening (10a) and a rear end closed, and the pen core 14 of the writing section 12 is closed near the shaft cylinder opening 10a by closing the front end opening 10a.
The periphery is projected and fixed, and a temporary ink reservoir member 16 is accommodated inside the tip end side portion of the shaft cylinder, following the writing unit 12. An inner space of the shaft cylinder 10 on the rear side of the ink reservoir member 16 serves as an ink tank 18 for storing the ink 20 such as raw ink.

The pen core 14 of the writing section 12 is held by the holder 22 having the rear end collar-shaped portion 22a fitted on the inner circumference of the barrel 10 with the tip 14a of the pen core 14 exposed and the ink reservoir. The member 16 is fitted into the insertion hole 16a at the axial center portion. As the pen core 14, a fiber bundle core, a resin molded core, or a porous molded core can be used. Further, the writing portion 12 may have a separate writing tip portion, such as a felt-tip pen, a ballpoint pen,
It can be used for various writing instruments such as a fountain pen. Further, the air holes 22b of the holder 22 are communicated with the air grooves 42 (see FIG. 4) formed in each of the sheet bodies 24, whereby an air path between the outside air and the ink reservoir member 16 is secured and smooth air is obtained. The replacement function can be demonstrated.

In the ink reservoir member 16, a plurality of thin plate-shaped sheets 24 are provided in the axial direction of the pen core 14 in the outer peripheral portion of a pen core (induction core) 14 for guiding the ink 20 in the ink tank 18 to the writing section 12. (Shaft cylinder 10 and ink reservoir member 16
(Also in the axial direction), a gap (which becomes the groove portion 26) is arranged, and a center slit (also referred to as a vertical groove) 28 is formed in each sheet body 24 in the axial direction of the pen core 14. 16 and an ink reservoir that exhibits a temporary ink reservoir function by allowing the ink to flow into and out of the groove portion 26 between the sheet bodies 24 through the center slit 28 according to the pressure change in the ink tank 18. The member 16. The ink reservoir member 16 is formed by resin injection molding using a mold.

Further, the ink reservoir member 16 is formed with a cylindrical portion 16b having an insertion hole 16a having an inner hole for inserting the pen core 14 in the shaft core portion, and the thin plate-like sheet body 24 has this cylindrical portion. Grooves 26 are provided around 16b, arranged in the axial direction, and integrally molded with resin so as to spread in the radial direction. Further, as shown in detail in FIG. 2, the ink reservoir member 16 has a thick plate portion 30 at the rear end thereof, and an outer peripheral portion of the thick plate portion 30 passes over the annular protrusion 32 on the inner peripheral surface of the barrel 10 and the protrusion. It tightly fits in an annular groove 34 formed behind 32. Further, a disc-shaped guide plate portion 36 is connected to the rear surface of the thick plate portion 30 in parallel with the rear surface of the thick plate portion 30 with a certain small interval therebetween by an arc-shaped rib 38. Further, the pen core 14 passing through the insertion hole 16a of the ink reservoir member 16 has a rear end 1
4b penetrates through the central hole 36a of the guide plate 36 and projects into the ink tank 18, and the ink 2
It is designed to touch 0.

Further details will be described. As shown in FIGS. 2 to 4, a first air replacement hole 40 connected to the center slit 28 is formed in a portion of the ink reservoir member 16 that faces the inside of the ink tank 18, and the first air replacement hole 40 is formed. In addition to the replacement hole 40, a second air replacement hole 44 connected to the air groove 42 of the ink reservoir member 16 is provided. The second
The air replacement hole 44 is an air replacement hole having a groove width substantially equal to that of the first air replacement hole 40, and generates substantially the same capillary force (preferably, substantially the same capillary force is exerted).
The second air replacement holes 44 are formed on both sides of the first air replacement hole 40.
When the ink reservoir member 16 is viewed in cross section, the center slit 28 and the first air replacement hole 40 are formed in the same direction and at the same position, and the second air replacement hole 44 is the first
Is formed in parallel with the air replacement hole 40. The center slit 28 is formed up to a portion adjacent to the pen core 14 of the tubular portion 16b into which the pen core 14 of the ink reservoir member is inserted.

According to the embodiment, the first air replacement hole 40 connected to the center slit 28 is formed in the portion of the ink reservoir member 16 facing the ink tank 18, and the first air replacement member 40 is formed. Since the second air replacement hole 44 connected to the air groove 42 of the ink reservoir member 16 is provided separately from the hole 40, it is possible to sufficiently cope with a sudden pressure fluctuation. Further, since the second air replacement hole 44 is not connected to the center slit 28, it is possible to provide an air replacement hole other than the first air replacement hole 40 without complicating the mold structure. Therefore, the ink quickly flows into the ink reservoir member with a simple structure without complicating the mold structure.
Since the ink can be discharged, the ink reservoir member 16 does not hinder the performance.

Further, the second air replacement hole 44 has a first
Since it is an air replacement hole having a groove width almost equal to that of the air replacement hole 40, the first air replacement hole 40 and the second air replacement hole 44 exert the same capillary force to generate air in each air replacement hole. The replacement can be done in good balance without excess or deficiency. Therefore, the performance of the ink reservoir member does not deteriorate.

Further, the second air replacement hole 44 has a first
Since one or more holes are formed on both sides of the air replacement hole 40, air replacement can be performed without excess or deficiency in the cross section of the ink reservoir member 16. Further, when the ink reservoir member 16 is viewed in cross section, the center slit 28 and the first air replacement hole 4 are provided.
0 is formed in the same direction, and the second air displacement hole 44 is
Since it is formed in parallel with the first air displacement hole 40, the resin-formed ink reservoir member is released from the injection molding die by using the center slit formed along the radial direction of the ink reservoir member. Although the mold is released along the direction, the second air replacement hole 44 is also parallel to the center slit 28 and the first air replacement hole 40, so that the mold can be released easily.

Further, the center slit 28 has a cylindrical portion 1 for inserting the pen core 14 of the ink reservoir 16 into which the pen core is inserted.
Since it is formed so as to penetrate to the inner peripheral surface portion of 6b (since it is formed up to the portion adjacent to the pen core), the ink from the ink tank 18 passes through the center slit 28 to the pen core 14 and the groove portion 26. Ink can come in and out smoothly between them.

In the above-mentioned embodiment, the writing tool using ink as the coating liquid has been described as an example of the coating tool. However, the present invention is also applicable to a coating tool for applying a coating solution such as a cosmetic or a correction fluid from the coating section onto an object. It is within the target range.

[0018]

As described above, according to the present invention, the first air displacement hole connected to the center slit is formed in the portion of the coating liquid reservoir member facing the inside of the tank, and the first air displacement hole is formed. Since the second air replacement hole connected to the air groove of the coating liquid reservoir is provided separately from the air replacement hole, it is possible to sufficiently cope with a sudden pressure fluctuation. Further, since the second air replacement hole is not connected to the center slit, it is possible to provide the air replacement hole other than the first air replacement hole without complicating the mold structure. Therefore, air can be smoothly replaced in the tank with a simple structure without complicating the mold structure, and the coating liquid can quickly flow into and out of the coating liquid storage member, so that the performance of the coating liquid storage member can be improved. Therefore, in the coating liquid reservoir member having a plurality of air displacement holes to cope with a sudden pressure change, the structure of the molding die of the coating liquid reservoir member is simplified, the molded product is easily demolded, and the yield is improved. The cost can be improved.

[Brief description of drawings]

FIG. 1 is an overall vertical cross-sectional view of a writing instrument according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of a main part around a rear portion of an ink reservoir member of the writing instrument of FIG.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a sectional view taken along line BB of FIG.

[Explanation of symbols]

10-axis cylinder 12 Writing Department 14 Pen core 16 Ink reservoir member 18 ink tank 24 sheets 26 Groove 28 Center slit 40 First air displacement hole 42 Air groove 44 Second Air Displacement Hole

Claims (4)

[Claims] 1. A plurality of sheet-shaped bodies are arranged on the outer periphery of an induction core that guides a coating liquid in a tank to a coating portion with a gap in the induction-core axial direction, and each sheet-shaped body has the induction-core axial direction. It is a coating liquid reservoir member in which a center slit is formed, and the coating liquid is allowed to flow into and out of the groove portion between the sheet bodies through the center slit in accordance with the pressure change in the tank to temporarily store the coating liquid. In an applicator having a coating liquid reservoir member exhibiting a reservoir function, a first air displacement hole connected to a center slit is formed in a portion of the coating liquid reservoir member facing the tank, and An applicator characterized in that a second air replacement hole connected to the air groove of the coating liquid reservoir is provided separately from the air replacement hole. 2. The applicator according to claim 1, wherein the second air replacement hole is an air replacement hole having a groove width substantially equal to that of the first air replacement hole. 3. The applicator according to claim 1, wherein one or more second air replacement holes are formed on both sides of the first air replacement hole. 4. The coating liquid reservoir member is formed in the same direction as the center slit first air replacement hole in a cross-sectional view, and the second air replacement hole is formed parallel to the first air replacement hole. The applicator according to any one of claims 1 to 3, wherein the applicator is provided.