WO2017094614A1 - インキカートリッジ及び筆記具 - Google Patents

インキカートリッジ及び筆記具 Download PDF

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Publication number
WO2017094614A1
WO2017094614A1 PCT/JP2016/084980 JP2016084980W WO2017094614A1 WO 2017094614 A1 WO2017094614 A1 WO 2017094614A1 JP 2016084980 W JP2016084980 W JP 2016084980W WO 2017094614 A1 WO2017094614 A1 WO 2017094614A1
Authority
WO
WIPO (PCT)
Prior art keywords
plug
writing instrument
protrusion
ink cartridge
stopper
Prior art date
Application number
PCT/JP2016/084980
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
貴宣 星野
Original Assignee
株式会社パイロットコーポレーション
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社パイロットコーポレーション filed Critical 株式会社パイロットコーポレーション
Priority to CN201680068332.0A priority Critical patent/CN108290439B/zh
Priority to BR112018010461-2A priority patent/BR112018010461B1/pt
Priority to JP2017553818A priority patent/JP6596509B2/ja
Publication of WO2017094614A1 publication Critical patent/WO2017094614A1/ja

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K5/00—Pens with ink reservoirs in holders, e.g. fountain-pens
    • B43K5/02—Ink reservoirs
    • B43K5/14—Exchangeable ink cartridges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K7/00—Ball-point pens
    • B43K7/02—Ink reservoirs; Ink cartridges
    • B43K7/08—Preventing leakage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K8/00—Pens with writing-points other than nibs or balls
    • B43K8/02—Pens with writing-points other than nibs or balls with writing-points comprising fibres, felt, or similar porous or capillary material
    • B43K8/03—Ink reservoirs; Ink cartridges

Definitions

  • the present invention relates to a replaceable ink cartridge and a writing instrument including the same, and more particularly to an ink cartridge and a writing instrument including an ink leakage prevention mechanism.
  • a writing instrument with a replaceable ink cartridge is known.
  • a conventional ink cartridge has a configuration including a cylindrical container for containing ink and a stopper for sealing the opening of the container.
  • a conventional stopper is constituted by a ball or a disk.
  • the writing instrument main body corresponding to the ink cartridge is provided with a protrusion for opening the stopper.
  • the writing instrument 1 disclosed in FIG. 1 of Japanese Patent Application Laid-Open No. 2008-006794 includes a protruding piece 53 a for opening the stopper 9 of the ink cartridge 7.
  • the protruding piece 53 a is provided in the connecting pipe portion 53.
  • the connecting pipe 53 is attached to the opening of the ink cartridge 7.
  • the protruding piece 53 a presses the peripheral portion of the plug 9.
  • the stopper 9 is detached from the opening of the ink cartridge 7.
  • the ink in the ink cartridge 7 is supplied to the ink occlusion body 3 through the connection pipe portion 53.
  • Patent Document 2 has a problem that ink remaining in the ink cartridge 7 leaks from the opening when the used ink cartridge 7 is removed from the connecting pipe portion 53. Therefore, the present applicant proposes a writing instrument provided with an ink leakage prevention mechanism in International Publication No. 2015/041202 (Patent Document 2).
  • the writing instrument 101 disclosed in FIGS. 4A to 4C of Patent Document 2 includes a writing instrument body 102 and an ink cartridge 106.
  • a rod-shaped protrusion 152 is provided in the center of the writing instrument main body 102.
  • a small protrusion 155 is formed at the tip of the protrusion 152.
  • the small protrusion 155 has a function of a male fitting portion.
  • the ink cartridge 106 includes a stopper 108.
  • the stopper 108 is configured to be detachable from the opening 172 of the ink cartridge 106.
  • a small hole 183 is provided at the tip of the stopper 108.
  • the small hole 183 has a function of a female fitting portion.
  • the small protrusion 155 of the protrusion 152 is fitted into the small hole 182 of the plug 108.
  • the protrusion 152 presses the plug 108 while keeping the small protrusion 155 and the small hole 182 fitted.
  • the stopper 108 is detached from the opening 172 of the ink cartridge 106.
  • the ink in the ink cartridge 106 is supplied to the ink occlusion body 104 through the ink guiding portion 151.
  • the stopper 108 fitted to the small protrusion 155 is inserted into the opening 172 of the ink cartridge 106 again.
  • the plug 108 is fitted into the opening 172 of the ink cartridge 106.
  • the opening 172 of the ink cartridge 106 is sealed by the stopper 108.
  • leakage of ink remaining in the ink cartridge 106 is prevented.
  • the writing instrument 101 of Patent Document 2 has an excellent effect of preventing leakage of remaining ink when the ink cartridge 106 is replaced.
  • the ink cartridge 106 of Patent Document 2 cannot be applied to the writing instrument 1 in which the protruding piece 53a is provided on the connecting pipe portion 53 as disclosed in Patent Document 1. That is, the writing instrument 1 of Patent Document 1 is configured such that the stopper 9 is removed when the protruding piece 53 a presses the peripheral portion of the stopper 9.
  • the writing instrument 101 of Patent Document 2 is configured such that the plug 108 is removed by a protrusion 152 provided at the center of the writing instrument body 102.
  • the protruding piece 53a provided on the writing instrument 1 of Patent Document 1 cannot remove the plug 108 of the cartridge 106 of Patent Document 2. That is, the ink cartridge 106 of Patent Literature 2 cannot be used for the writing instrument 101 having a different configuration for opening the stopper as in Patent Literature 1.
  • a cylindrical projection for distinguishing the front surface and the back surface of the stopper 9 is formed at the center of the stopper 9 of Patent Document 1.
  • This cylindrical protrusion interferes with the protrusion 152 of Patent Document 2, and it is extremely difficult to smoothly remove the plug 9 by the protrusion 152.
  • the present invention has been made in view of the above problems, First, providing an ink cartridge that can be used for both a writing instrument body that conforms to an ink leakage prevention mechanism and a writing instrument body that does not conform to an ink leakage prevention mechanism; Second, providing a writing instrument body that can be used for both an ink cartridge that conforms to an ink leakage prevention mechanism and an ink cartridge that does not conform to an ink leakage prevention mechanism;
  • the third object is to provide a writing instrument provided with the ink cartridge and / or the writing instrument body.
  • a first ink cartridge includes a cylindrical container for containing ink and a stopper that seals the opening of the container, and the stopper is provided by a protrusion provided on the writing instrument body.
  • An ink cartridge to be opened wherein the stopper includes a first stopper and a second stopper, and the first stopper has a stopper body fitted to the protrusion, and the second stopper is And an outer peripheral portion fitted to the inner peripheral surface of the opening, and a passage hole for the ink into which the plug main body of the first plug is fitted, the plug main body of the first plug and the second
  • the fitting between the stopper and the passage hole of the stopper can be released by the protrusion, and the outer peripheral part of the second stopper is formed inside the opening by a force toward the rear of the container. It is configured to be able to come off from the peripheral surface.
  • the fitting force between the outer peripheral portion of the second plug and the inner peripheral surface of the opening is such that the plug body of the first plug and the second plug It is larger than the fitting force between the through hole.
  • the inner peripheral surface constituting the passage hole of the second stopper is formed in a tapered shape that spreads toward the rear of the container.
  • the first plug protrudes from the plug body toward the inner peripheral surface of the opening and allows the ink to pass therethrough. It has a fold configured to be possible.
  • a step is provided inside the container, and the step is removed from the second plug. It is comprised so that the movement to the back of the said 1st stopper may be restrict
  • a female fitting portion or a male fitting portion is provided in the stopper body, and the female fitting portion or the male fitting portion is provided.
  • the mold fitting portion is configured to be able to fit into the protrusion of the writing instrument body.
  • the female fitting portion is provided inside the plug body, and the female fitting portion has a hole that opens only in front of the plug body. And an annular recess provided on the inner peripheral surface of the hole.
  • the opening of the container has an outer diameter of 13 mm to 23 mm.
  • the opening of the container has an inner diameter in the range of 10 to 22 mm.
  • the writing instrument of the present invention includes the ink cartridge according to any one of (1) to (9) above, and a writing instrument main body to which the ink cartridge is replaceably mounted, and the writing instrument main body is provided with a protrusion.
  • the protrusion protrudes rearward from the writing instrument body and is configured to be able to open either the first plug or the second plug of the ink cartridge.
  • the protrusion is disposed in the center of the writing instrument body, and has a width in a short direction capable of passing through the passage hole of the second stopper, And it is comprised so that it can fit in the plug main part of the 1st plug, and the fitting force between the projection part and the plug main body is the outer peripheral part of the 2nd plug, and the inner peripheral surface of the opening. It is smaller than the fitting force between.
  • a male fitting portion or a female fitting portion is provided on the protrusion, and the male fitting portion or the female fitting portion is provided with the plug. It is configured to be able to fit into the main body.
  • a female fitting portion is provided inside the plug body, and the female fitting portion has a hole that opens only in front of the plug body;
  • An annular recess provided on the inner peripheral surface of the hole, and the male fitting portion is provided at the tip of the protruding portion, and the male fitting portion is fitted to any part of the annular recess. Having a plurality of convex surfaces.
  • the protrusion has a width in a short direction substantially equal to a diameter of the passage hole of the second plug, and the passage hole When passing through, the passage hole is divided into two.
  • the protrusion is provided at the center of a partition partitioning the inside of the writing instrument body, and the partition has at least two portions with the protrusion interposed therebetween.
  • Two through holes are provided, and at least two flow paths corresponding to the through holes are provided on the side surfaces of the protrusions, and the flow paths are configured by grooves extending in the front-back direction.
  • the writing instrument main body is provided with a hermetic connection portion, and the hermetic connection portion is constituted by a cylindrical wall portion surrounding the protruding portion. And an outer peripheral surface capable of being hermetically fitted to the inner peripheral surface of the opening.
  • the writing instrument body is provided with a hermetic connection portion, and the hermetic connection portion has an outer peripheral surface capable of being hermetically fitted to the inner peripheral surface of the opening.
  • the projecting portion is provided on the sealed connection portion, the projecting portion projects rearward from the sealed connection portion, and presses the peripheral portion of the second stopper toward the rear of the container. The second stopper can be opened.
  • a female fitting portion is provided inside the plug body, and the female fitting portion is disposed in front of the plug body.
  • a second minute projection is provided at a tip of the male fitting portion, and the second minute projection is offset from the center of the male fitting portion. It is located on the side, protrudes rearward from the male fitting portion, has a shorter length than the first minute protrusion, and forms a gap between the first minute protrusion.
  • the gap between the first microprojection and the second microprotrusion is shifted from the center of the male fitting portion and located on the other side.
  • the tip surface of the first microprotrusion has an area smaller than the horizontal sectional area of the first microprotrusion in a vertical state.
  • two opposing side surfaces of the first microprojection are inclined from the tip side of the first microprotrusion toward the male fitting portion.
  • a tip surface of the second minute protrusion has an area smaller than a horizontal sectional area of the second minute protrusion in a vertical state.
  • two opposing side surfaces of the second minute protrusion are inclined from the distal end side of the second minute protrusion toward the male fitting portion.
  • a second ink cartridge according to the present invention is an ink cartridge suitable for the writing instrument body according to any one of the above (19) to (24), and includes a cylindrical container for containing ink, and the container And a cylindrical projection provided at the center of the stopper, and the length of the cylindrical projection is between the first microprojection and the second microprojection. It is shorter than the depth of the gap, and the diameter of the cylindrical protrusion is shorter than the width of the gap between the first minute protrusion and the second minute protrusion.
  • front means the direction of the pen tip of the writing instrument and the direction of the opening of the ink cartridge
  • rear means the direction opposite to the front
  • the ink cartridge of the present invention can be used for both a writing instrument body that conforms to the ink leakage prevention mechanism and a writing instrument body that does not conform to the ink leakage prevention mechanism. That is, the ink cartridge of the present invention can be used for two types of writing instrument bodies having different configurations for opening the stopper. Furthermore, the ink cartridge of the present invention is compatible with both a new product writing instrument equipped with an ink leakage prevention mechanism and an old product writing instrument equipped with no ink leakage prevention mechanism. Therefore, when a product provider switches an old product to a new product, it is only necessary to provide the market with only one type of ink cartridge having the configuration of the present invention. In addition, users of both new products and old products need only select one type of ink cartridge provided on the market.
  • the writing instrument body provided with the fine protrusions of the present invention can be used for both an ink cartridge that is compatible with the ink leakage prevention mechanism and an ink cartridge that is not compatible with the ink leakage prevention mechanism. That is, the writing instrument body provided with the microprojections of the present invention can smoothly open both the stopper of the ink cartridge provided with the ink leakage prevention mechanism and the stopper of the ink cartridge not provided with the ink leakage prevention mechanism. . Therefore, immediately after switching the old product to the new product, both the new and old ink cartridges can be used for the writing instrument body of the new product even when two types of new and old ink cartridges are distributed in the market.
  • FIG. 1A to 1C show a writing instrument including an ink cartridge according to an embodiment of the present invention.
  • FIG. 1A is a vertical sectional view showing the writing instrument.
  • FIG. 1B is a horizontal sectional view showing the writing instrument.
  • FIG. 1C is a partially enlarged view of FIG. 1B.
  • FIG. 2A is a vertical sectional view showing a state before the ink cartridge shown in FIG. 1A is attached to the writing instrument body.
  • FIG. 2B is a partially enlarged view of FIG. 2A.
  • FIG. 3A is a perspective view showing a first stopper constituting the ink cartridge.
  • FIG. 3B is a perspective view showing a second stopper constituting the ink cartridge.
  • FIG. 3C is a perspective view showing an intermediate member constituting the writing instrument body.
  • FIGS. 4A to 4C are vertical cross-sectional views of the main part showing the process until the ink cartridge is attached to the writing instrument body.
  • 4D to 4F are horizontal cross-sectional views corresponding to FIGS. 4A to 4C, respectively.
  • 5A to 5C are vertical cross-sectional views of the main part showing the process until the ink cartridge is removed from the writing instrument body.
  • FIGS. 5D to 5F are horizontal cross-sectional views corresponding to FIGS. 5A to 5C, respectively.
  • FIG. 6A is a vertical sectional view showing another writing instrument including the ink cartridge.
  • 6B and 6C are vertical cross-sectional views of the main part showing the process until the ink cartridge is attached to the writing instrument body of the other writing instrument.
  • FIG. 7A to 7D show an ink cartridge according to the second embodiment of the present invention.
  • FIG. 7A is a perspective view showing a first stopper constituting the ink cartridge.
  • FIG. 7B is a perspective view showing a container constituting the ink cartridge.
  • 7C and 7D are cross-sectional views of the container.
  • FIG. 8A is a perspective view showing an intermediate member of the writing instrument body according to the second embodiment of the present invention.
  • FIG. 8B is an enlarged view showing a protrusion of the intermediate member.
  • FIG. 9A is a plan view showing the protrusion.
  • FIG. 9B is a side view showing the protrusion.
  • FIG. 10 is a cross-sectional view showing the intermediate member and a disk-shaped stopper.
  • FIG. 11A and 11B show the writing instrument main body to which an ink cartridge having an ink leakage prevention mechanism is attached.
  • FIG. 11A is a cross-sectional view of main parts in the vertical direction
  • FIG. 11B is a cross-sectional view of main parts in the horizontal direction.
  • 12A to 12C are horizontal cross-sectional views showing the process until an ink cartridge not equipped with an ink leakage prevention mechanism is attached to the writing instrument body.
  • 12D is a cross-sectional view of the main part in the vertical direction corresponding to FIG. 12C.
  • FIG. 13A is a cross-sectional view of the principal part showing the intermediate member of the writing instrument body according to the third embodiment of the present invention.
  • FIG. 13B is a horizontal cross-sectional view of the main part of the writing instrument main body to which an ink cartridge not equipped with an ink leakage prevention mechanism is attached.
  • the writing instrument 1 of the present embodiment includes a writing instrument body 2 and an ink cartridge 3.
  • the ink cartridge 3 is accommodated in the shaft cylinder 11 of the writing instrument body 2.
  • the shaft cylinder 11 includes a front shaft 11A and a rear shaft 11B.
  • the front shaft 11A and the rear shaft 11B are detachably coupled by screwing.
  • the ink cartridge 3 accommodated in the shaft cylinder 11 can be replaced by removing the rear shaft 11B from the front shaft 11A (see FIG. 2A).
  • the ink cartridge 3 of this embodiment includes a cylindrical container 30 that stores ink, and plugs 40 and 50 that seal the opening 31 of the container 30.
  • the container 30 is a cylindrical part having an opening 31 at the front end and a bottom at the rear end. Ink 30 (not shown) is accommodated in the container 30.
  • a plurality of ribs 32 are formed at equal intervals on the inner peripheral surface of the rear side of the container 30. Each rib 32 facilitates the flow of ink in the container 30. Further, the front end surface of each rib 32 forms a plurality of step portions 32 a located behind the opening portion 31.
  • the container 30 is manufactured by injection molding or blow molding of synthetic resin.
  • a synthetic resin such as polypropylene is applied.
  • the container 30 is preferably made of a transparent or translucent synthetic resin so that the color and remaining amount of the ink accommodated therein can be visually recognized.
  • the opening of the container 30 preferably has an outer diameter of 13 mm or greater and 23 mm or less.
  • the outer diameter of the opening of the container 30 can be about 18 mm.
  • the opening of the container 30 preferably has an inner diameter in the range of 10 to 22 mm.
  • the inner diameter of the opening of the container 30 is more preferably in the range of 16 to 17 mm. Thereby, sufficient strength of the container 30 can be obtained, and a sufficient amount of ink can be accommodated in the container 30.
  • oil-based ink for writing board As the ink accommodated in the container 30, for example, oil-based ink for writing board is applied.
  • the oil-based ink for writing boards contains a solvent and an additive.
  • a solvent in which ethanol and isopropyl alcohol are mixed is used as the solvent for the oil-based ink for writing boards.
  • additives such as a pigment, resin, release agent, are used for the additive of oil-based ink for writing boards, for example.
  • the oil-based ink for writing boards contains the above-mentioned solvent and additive, and thus has excellent handwriting dryness and erasability.
  • the ink stored in the container 30 is not particularly limited.
  • the ink accommodated in the container 30 may be, for example, an oil-based ink that does not contain a release agent, or a water-based ink that uses water as a main solvent.
  • the ink cartridge 3 of this embodiment includes an ink leakage prevention mechanism.
  • This ink leakage prevention mechanism is configured to re-seal the opening 31 of the container 30 with the stoppers 40 and 50 when the ink cartridge 3 is removed from the writing instrument body 2.
  • the plugs 40 and 50 of the present embodiment can be opened by both the writing instrument body 2 that conforms to the ink leakage prevention mechanism and the writing instrument body 4 of FIG. 6A that does not conform to the ink leakage prevention mechanism. It has become.
  • the stopper of the ink cartridge 3 is composed of a first stopper 40 and a second stopper 50.
  • the first stopper 40 and the second stopper 50 constitute a single stopper that seals the opening 31 of the container 30 by being fitted to each other.
  • the first plug 40 and the second plug 50 in a separated state are shown in FIGS. 3A and 3B.
  • the first plug 40 includes a cylindrical plug body 41 and four ridges 42.
  • the plug body 41 is fitted into an ink passage hole 51 a provided in the second plug 50.
  • a hole 41 a that opens only forward is formed in the plug body 41.
  • the hole 41a does not penetrate the plug body 41.
  • An annular recess 41b is provided on the inner peripheral surface of the hole 41a.
  • the hole 41a and the annular recess 41b constitute a female fitting portion for fitting with the protruding portion 22 of the writing instrument body 2. That is, a small protrusion 22 ⁇ / b> A that is a male fitting part is provided at the tip of the protrusion 22 of the writing instrument body 2.
  • the small protrusion 22A has a pair of convex portions 22a.
  • the tip side portion 41c of the plug body 41 is slightly thinned.
  • the thin distal end portion 41c is easily deformed by receiving an external force.
  • the distal end side portion 41 c of the plug main body 41 is smoothly fitted into the passage hole 51 a of the second plug 50.
  • an outer peripheral taper 41d and an inner peripheral taper 41d are formed on the circular end surface of the distal end side portion 41c of the plug body 41.
  • the outer peripheral taper 41 d guides the distal end side portion 41 c of the plug body 41 into the passage hole 51 a of the second plug 50.
  • the front end side portion 41 c of the plug body 41 is more smoothly fitted into the passage hole 51 a of the second plug 50.
  • the taper 41d on the inner periphery guides the small protrusion 22A of the writing instrument body 2 into the hole 41a of the stopper body 41.
  • the convex part 22a of the small protrusion 22A does not collide with the entrance of the hole 41a.
  • the protrusion 22a of the small protrusion 22A is more smoothly fitted into the annular recess 41b in the hole 41a.
  • the four hooks 42 are provided radially at the rear end of the stopper body 41 at equal intervals.
  • the collar 42 is composed of an inner part and an outer part bent at a right angle, and has a fan-shaped overall shape.
  • the inner portion forms a fitting recess 42 a on the front surface of the flange 42.
  • the outer portion forms an abutting portion 42 b on the rear surface of the flange 42.
  • Both the fitting recess 42a and the contact portion 42b have an arc shape.
  • the fitting recess 42a is fitted into a cylindrical main body 51 of the second plug 50 described later.
  • the abutting portion 42b abuts on the step portion 32a of the container 30 described above.
  • Each of the four intervals between the ridges 42 forms a slit-like ink passage 42c.
  • the second stopper 50 includes a cylindrical main body 51 and an annular outer peripheral portion 52.
  • the cylindrical main body 51 constitutes the ink passage hole 51a described above.
  • the passage hole 51 a is configured by the inner peripheral surface of the cylindrical main body 51.
  • the passage hole 51a opens both forward and backward.
  • the opening behind the passage hole 51a serves as the inlet of the plug body 41 of the first plug 40 described above.
  • a taper 51b is formed which extends from the substantially center of the passage hole 51a toward the rear.
  • the taper 51b guides the distal end side portion 41c of the plug body 41 to the center of the passage hole 51a. Thereby, the front end side portion 41 c of the plug body 41 is more smoothly fitted into the passage hole 51 a of the second plug 50.
  • the annular outer peripheral portion 52 is provided so as to surround the outside of the cylindrical main body 51.
  • the annular outer peripheral portion 52 has a circular cross-sectional shape.
  • the outer diameter of the annular outer peripheral portion 52 corresponds to the inner diameter of the opening 31 of the container 30.
  • the annular outer peripheral portion 52 is provided with a fitting convex portion 52a along a circular side surface.
  • the fitting convex portion 52 a is fitted into an annular concave portion provided on the inner peripheral surface of the opening 31 of the container 30.
  • the fitting convex portion 52a of the present embodiment has a configuration that fits over the annular concave portion.
  • An annular convex portion is formed on each of the front and rear sides of the annular concave portion.
  • the fitting convex portion 52a gets over the front annular convex portion and is coupled to the rear fitting concave portion. Furthermore, when the fitting convex part 52a is pressed by the force which goes to the back of the container 30, it has a structure which gets over the rear annular convex part and comes off from the inner peripheral surface of the opening part 31 of the container 30.
  • FIG. 2B shows a fitting state of the first stopper 40, the second stopper 50, and the opening 31 of the container 30 in the unused ink cartridge 3. That is, the ink cartridge 3 of this embodiment is distributed in the market with the plugs 40 and 50 shown in FIG. 2B fitted.
  • the plug body 41 of the first plug 40 is fitted into the passage hole 51a of the second plug 50.
  • the fitting force between the plug body 41 and the passage hole 51a is referred to as “first fitting force”.
  • the four hooks 42 of the first plug 40 are fitted behind the cylindrical main body 51 of the second plug 50.
  • the fitting force between each flange 42 and the cylindrical main body 51 is referred to as “second fitting force”.
  • the annular outer peripheral portion 52 of the second stopper 50 is fitted to the inner peripheral surface of the opening 31 of the container 30 via the fitting convex portion 52a.
  • the fitting force between the annular outer peripheral portion 52 and the inner peripheral surface of the opening 31 is referred to as “third fitting force”.
  • the third fitting force is larger than the sum of the first fitting force and the second fitting force. That is, even when a force exceeding the sum of the first fitting force and the second fitting force is applied to the first plug 40, the fitting between the second plug 50 and the opening 31 of the container 30 is not released. . In this case, only the fitting between the first plug 40 and the second plug 50 is released. The fitting between the second plug 50 and the opening 31 of the container 30 is released when a force exceeding the third fitting force is applied to the second plug 50.
  • the first fitting force is set to a relatively small value in order to facilitate the fitting between the first plug 40 and the second plug 50.
  • the second fitting force supplements the first fitting force so that the fitting between the first plug 40 and the second plug 50 is not easily released in the unused ink cartridge 3.
  • the sum of the first fitting force and the second fitting force is, for example, in the range of 0.5 kgf to 4 kgf, and preferably in the range of 1 kgf to 2 kgf.
  • the total of the first fitting force and the second fitting force can be set to 1.5 kgf, for example.
  • the third fitting force is, for example, in the range of 4 kgf to 10 kgf, and preferably in the range of 4 kgf to 8 kgf.
  • the third fitting force can be set to 7 kgf, for example.
  • a specific example of the re-fitting force between the first plug 40 and the second plug 50 will be described later.
  • various configurations can be applied to the “fitting” for generating the first, second and third fitting forces.
  • the first plug 40, and the second plug 50 constituting the ink cartridge 3 for example, each configuration of getting over fitting, surface fitting, or uneven fitting can be applied.
  • “Override fitting” refers to a configuration in which the first convex portion joins over the second convex portion.
  • Surface fitting refers to a configuration in which the first surface is closely coupled to the second surface.
  • Concave / concave fitting refers to a configuration in which a concave shape and a convex shape are matched and coupled.
  • the writing instrument body 2 of the present embodiment includes a shaft cylinder 11, a pen tip 12, an ink storage body 13, a cap 14, and an intermediate member 20.
  • the shaft cylinder 11 of the present embodiment includes the front shaft 11A and the rear shaft 11B.
  • the nib 12, the ink occlusion body 13, and the intermediate member 20 are all provided on the front shaft 11A.
  • the front shaft 11A and the rear shaft 11B will be described, and then the pen tip 12, the ink storage body 13, and the intermediate member 20 will be described.
  • the front shaft 11A and the rear shaft 11B are hollow cylindrical bodies and are manufactured by injection molding of synthetic resin.
  • a synthetic resin such as polypropylene or polyethylene is applied.
  • a front end hole for holding the nib 12 is provided at the front end of the front shaft 11A.
  • the front end hole communicates with the internal space of the front shaft 11A.
  • the rear end of the nib 12 held in the front end hole protrudes into the internal space of the front shaft 11A.
  • a rib (not shown) is formed on the inner peripheral surface of the front end hole. The rib holds the nib 12 in the front end hole by being pressed against the outer peripheral surface of the nib 12. Further, the rib forms an air passage between the outer peripheral surface of the nib 12 and the inner peripheral surface of the front end hole.
  • Ink storage 13 is accommodated in front of the internal space of front shaft 11A.
  • the rear end of the pen tip 12 described above is inserted into the ink storage body 13.
  • a plurality of ribs corresponding to the ink storage body 13 are formed on the inner peripheral surface of the front shaft 11A.
  • Each rib extends in parallel to the front-rear direction of the front shaft 11A at an interval.
  • Each rib holds the ink storage body 13 in the internal space of the front shaft 11 ⁇ / b> A by being pressed against the outer peripheral surface of the ink storage body 13.
  • Each rib forms an air passage between the outer peripheral surface of the ink occlusion body 13 and the inner peripheral surface of the front shaft 11A.
  • the intermediate member 20 is fitted behind the ink occlusion body 13 in the internal space of the front shaft 11A.
  • An annular rib (not shown) is provided on the inner peripheral surface of the front shaft 11A.
  • the annular rib is fitted to the outer peripheral surface of the intermediate member 20. Thereby, the intermediate member 20 is held at a predetermined position in the internal space of the front shaft 11A.
  • the ink cartridge 3 described above is attached to the intermediate member 20.
  • a female thread is provided on the inner peripheral surface behind the front shaft 11A.
  • a male screw is provided on the outer peripheral surface in front of the rear shaft 11B.
  • the front shaft 11 ⁇ / b> A and the rear shaft 11 ⁇ / b> B are detachably coupled by screwing these female screws and male screws.
  • the rear shaft 11 ⁇ / b> B covers the ink cartridge 3 attached to the intermediate member 20.
  • the rear shaft 11B is preferably made of a transparent or translucent synthetic resin so that the color and remaining amount of the ink accommodated in the ink cartridge 3 can be visually recognized.
  • the pen tip 12 of this embodiment is, for example, a marking pen tip.
  • the marking pen tip is manufactured, for example, by processing a synthetic resin fiber such as polyester fiber, acrylic fiber, or nylon fiber into a rod shape.
  • the front end of the nib 12 shown in the drawing is ground like a bullet.
  • the front end shape of the nib 12 is not particularly limited.
  • the front end of the nib 12 may be processed into a chisel shape, for example.
  • the pen tip 12 is not limited to the marking pen tip.
  • the ink occlusion body 13 of the present embodiment is made of synthetic resin fibers such as polyester fibers processed into a columnar shape, for example.
  • the outer peripheral surface of the ink occlusion body 13 is covered with a cylindrical film.
  • polyethylene terephthalate is applied as the film material.
  • the configuration of the ink occlusion body 13 is not particularly limited as long as it can temporarily hold ink.
  • a pen core constituting a fountain pen may be applied as the ink occlusion body 13, for example.
  • the pen core is a bellows-like member provided with a large number of horizontal grooves, and can temporarily hold ink.
  • the configuration of the intermediate member 20 of the present embodiment is shown in FIGS. 1A, 1B, 2A, and 3C.
  • the intermediate member 20 is manufactured by, for example, synthetic resin injection molding.
  • a synthetic resin such as polypropylene or polyethylene is applied.
  • the intermediate member 20 is a component for attaching the ink cartridge 3 to the writing instrument body 2.
  • the ink accommodated in the ink cartridge 3 is supplied to the ink occlusion body 13 through the intermediate member 20.
  • the intermediate member 20 has a partition that partitions the internal space of the front shaft 11A.
  • Two through holes 21a are formed in the partition wall.
  • Two pipes 21 communicating with the respective through holes 21a are provided on the front surface of the partition wall.
  • the protrusion 22 and the sealing connection part 23 are provided on the rear surface of the partition wall.
  • an annular step portion is formed on the outer peripheral surface of the intermediate member 20. The intermediate member 20 is fitted to the annular rib formed on the inner peripheral surface of the front shaft 11A. Thereby, the intermediate member 20 is held in the internal space of the front shaft 11A.
  • the internal space of the front shaft 11A is sealed by the intermediate member 20, and only the two through holes 21a formed in the partition wall communicate with the inside and outside of the internal space.
  • the two through holes 21a are for exchanging air in the internal space with ink.
  • the front end sides of the two tubes 21 are all inserted through the ink storage body 13. Ink is supplied to the ink storage 13 through one tube 21. As the ink is supplied, air is pushed out from the internal space. Air is discharged out of the internal space through the other pipe 21.
  • the protrusion 22 opens only the first stopper 40 of the ink cartridge 3 and operates the ink leakage prevention mechanism of the ink cartridge 3 effectively.
  • the protrusion 22 is disposed at the center of the partition wall of the intermediate member 20.
  • the position of the protrusion 22 corresponds to the position of the first stopper 40 of the ink cartridge 3.
  • the small protrusion 22 ⁇ / b> A is provided at the tip of the protrusion 22.
  • the small protrusion 22 ⁇ / b> A constitutes a male fitting portion for fitting with the first plug 40.
  • the small protrusion 22A has a width corresponding to the diameter of the hole 41a provided in the plug body 41 of the first plug 40. As shown in FIGS.
  • a pair of convex portions 22a is formed on both side surfaces of the small protrusion 22A.
  • the pair of protrusions 22a are fitted into any part of the annular recess 41b.
  • the projecting portion 22 presses only the first plug 40 backward while maintaining the fitting of the convex portion 22a and the annular concave portion 41b, and releases the fitting between the first plug 40 and the second plug 50. (See FIGS. 1A and 1B).
  • the protrusion 22 of the present embodiment has a function of dividing the path through which ink and air flow into two. That is, the protrusion 22 is located between the two through holes 21a. Two flow paths 22b respectively corresponding to the respective through holes 21a are formed on the side surface of the protrusion 22. Each flow path 22b is configured by a groove portion having a substantially semicircular cross section extending in the front-rear direction. As shown in FIGS. 1A and 1B, the protrusion 22 has a width in the short direction substantially equal to the diameter of the passage hole 51 a of the second plug 50. When such a protrusion 22 is inserted into the passage hole 51a, the passage hole 51a is divided into two.
  • One flow path 22b of the protrusion 22 passes through one of the passage holes 51a.
  • the other flow path 22b of the protrusion 22 passes through the other of the passage holes 51a.
  • the ink flows through one flow path 22 b of the protrusion 22, and the air flows through the other flow path 22 b of the protrusion 22.
  • the other flow path 22b through which air flows is not blocked (liquid-tight) by ink. Thereby, the balance of the internal pressure of the inner space of the front shaft 11A and the ink cartridge 3 is maintained. As a result, the ink supply to the pen tip 12 is always performed stably, and stable writing can be performed without blurring of the handwriting.
  • the sealed connection portion 23 is a portion for sealingly connecting with the ink cartridge 3.
  • the airtight connection portion 23 is configured by a cylindrical wall portion that surrounds the protrusion portion 22.
  • the hermetic connection portion 23 has an outer peripheral surface that can be hermetically fitted to the inner peripheral surface of the opening 31 of the ink cartridge 3.
  • the writing instrument body 2 and the unused ink cartridge 3 are separated from each other.
  • the fitting state of the first plug 40 and the second plug 50 in the unused ink cartridge 3 is shown in FIG. 2B.
  • the distal end side portion 41 c of the plug body 41 of the first plug 40 is fitted deeply to the front end of the passage hole 51 a of the second plug 50.
  • the fitting recess 42 a of each flange 42 of the first plug 40 is fitted behind the cylindrical main body 51 of the second plug 50. Due to the fitted state of the first plug 40 and the second plug 50 shown in FIG. 2B, the unused ink cartridge 3 does not cause ink leakage in the market distribution process.
  • the ink cartridge 3 is inserted into the rear end opening of the front shaft 11A of the writing instrument body 2.
  • the protrusion 22 and the sealing connection 23 of the intermediate member 20 are inserted into the opening 31 of the ink cartridge 3.
  • the small protrusion 22 ⁇ / b> A of the protrusion 22 is inserted into the hole 41 a of the first plug 40.
  • a step portion (see FIG. 3C) formed between the protrusion 22 and the small protrusion 22 ⁇ / b> A contacts the front end of the first plug 40.
  • the pair of convex portions 22a of the small protrusion 22A is fitted into any portion of the annular concave portion 41b of the first plug 40 (see FIG. 1C).
  • the front end portion of the sealed connection portion 23 is shallowly inserted into the opening 31 of the ink cartridge 3.
  • the ink cartridge 3 is further inserted into the rear end opening of the front shaft 11A of the writing instrument body 2.
  • the protrusion 22 presses only the first plug 40 backward.
  • the fitting between the fitting recess 42a of each flange 42 of the first plug 40 and the cylindrical main body 51 of the second plug 50 is released.
  • the fitting between the plug body 41 of the first plug 40 and the passage hole 51a of the second plug 50 becomes shallow.
  • the fitting between the annular outer peripheral portion 52 of the second stopper 50 and the opening 31 of the ink cartridge 3 is maintained as it is.
  • the sealed connection portion 23 is further inserted into the opening 31 of the ink cartridge 3.
  • the ink cartridge 3 is then completely inserted into the rear end opening of the front shaft 11A of the writing instrument body 2.
  • the protrusion 22 passes through the passage hole 51 a of the second plug 50.
  • the fitting between the plug body 41 of the first plug 40 and the passage hole 51a of the second plug 50 is released.
  • the abutting portion 42 b of each collar 42 of the first stopper 40 abuts on the step portion 32 a in the container 30 of the ink cartridge 3.
  • the 1st stopper 40 is hold
  • the hermetic connection portion 23 is completely inserted into the opening 31 of the ink cartridge 3 and is hermetically fitted to the inner peripheral surface of the opening 31. Thereby, the internal space of the front shaft 11A and the inside of the container 30 of the ink cartridge 3 are communicated in a sealed state.
  • the ink in the container 30 is supplied to the passage hole 51a of the second plug 50 through the four ink passages 42c formed between the ridges 42.
  • the passage hole 51 a of the second plug 50 is divided into two by the protrusion 22.
  • the ink is supplied to the inner space of the front shaft 11A through one of the passage holes 51a.
  • air is pushed out from the inner space of the front shaft 11A. This air flows into the container 30 through the other of the passage holes 51a. Thereafter, the internal pressure balance between the internal space of the front shaft 11A and the container 30 is maintained.
  • the ink supplied to the internal space of the front shaft 11 ⁇ / b> A is held by the ink storage 13 and supplied to the pen tip 12.
  • FIGS. 5A and 5D show the same state as FIG. 4C and FIG. 4F. However, it is assumed that the ink in the ink cartridge 3 shown in FIGS. 5A and 5D is used by the user. The used ink cartridge 3 shown in FIGS. 5A and 5D is pulled out from the rear end opening of the front shaft 11 ⁇ / b> A of the writing instrument body 2.
  • the second plug 50 approaches the first plug 40. That is, the first stopper 40 is fitted to the small protrusion 22 ⁇ / b> A of the writing instrument body 2.
  • the second stopper 50 is fitted into the opening 31 of the ink cartridge 3. In such a configuration, when the ink cartridge 3 moves rearward, the second stopper 50 moves rearward along the side surface of the protrusion 22. As a result, the second plug 50 moves straight toward the first plug 40 fitted to the small protrusion 22A of the protrusion 22.
  • the second plug 50 that moves backward reaches the outer peripheral surface of the first plug 40 fitted to the small protrusion 22 ⁇ / b> A beyond the side surface of the protrusion 22.
  • the distal end side portion 41 c of the plug body 41 of the first plug 40 is re-fitted into the passage hole 51 a of the second plug 50. That is, the passage hole 51 a of the second plug 50 is sealed again by the first plug 40.
  • FIGS. 5C and 5F when the ink cartridge 3 is completely pulled out from the rear end opening of the front shaft 11A of the writing instrument main body 2, leakage of ink remaining in the ink cartridge 3 occurs. Is prevented.
  • the re-fitting between the first plug 40 and the second plug 50 shown in FIGS. 5C and 5F does not have to be a complete fitting state as shown in FIG. 2B.
  • Re-fitting between the first plug 40 and the second plug 50 can seal the passage hole 51a of the second plug 50 only for a short period until the user disposes of the used ink cartridge 3. What is necessary is just to be a fitting state.
  • the re-fitting force between the first plug 40 and the second plug 50 is, for example, in the range of 0.01 kgf to 1 kgf, and preferably in the range of 0.01 kgf to 0.5 kgf.
  • the re-fitting force between the first plug 40 and the second plug 50 can be set to 0.3 kgf, for example.
  • the ink cartridge 3 of the present embodiment operates the ink leakage prevention mechanism effectively in cooperation with the protrusion 22 of the writing instrument body 2. Furthermore, the ink cartridge 3 of the present embodiment can be used for a writing instrument body 4 that does not conform to the ink leakage prevention mechanism as shown in FIG. 6A.
  • the writing instrument body 4 shown in FIG. 6A has the same configuration as the writing instrument body 2 described above except for the intermediate member 60.
  • the intermediate member 60 in FIG. 6A is a part for attaching the ink cartridge 3 to the writing instrument body 4.
  • the ink accommodated in the ink cartridge 3 is supplied to the ink occlusion body 13 via the intermediate member 60.
  • the intermediate member 60 has a partition that partitions the internal space of the front shaft 11A.
  • Two through holes 61a are formed in the partition wall.
  • Two pipes 61 communicating with each through hole 61a are provided on the front surface of the partition wall.
  • a sealed connection portion 63 is provided on the rear surface of the partition wall.
  • the airtight connection part 63 is configured by a cylindrical wall part.
  • the airtight connection 63 has an outer peripheral surface that can be hermetically fitted to the inner peripheral surface of the opening 31 of the ink cartridge 3.
  • the intermediate member 60 has a configuration in which the protrusion 62 is provided in the airtight connection portion 63.
  • the projecting portion 62 is configured by a wall portion continuous to the airtight connection portion 63 and projects rearward from the hermetic connection portion 63.
  • the protrusion 62 has an inclined tip. The plugs 40, 50 of the ink cartridge 3 can be opened by the protrusion 62.
  • the ink cartridge 3 is inserted into the rear end opening of the front shaft 11 ⁇ / b> A of the writing instrument body 4.
  • the protrusion 62 and the sealing connection 63 of the intermediate member 60 are inserted into the opening 31 of the ink cartridge 3.
  • the distal end portion of the protruding portion 62 abuts on the annular outer peripheral portion 52 of the second plug 50.
  • the ink cartridge 3 is further inserted into the rear end opening of the front shaft 11 ⁇ / b> A of the writing instrument body 4.
  • the protrusion 62 presses only the annular outer peripheral portion 52 of the second stopper 50 backward.
  • the ink cartridge 3 is completely inserted into the rear end opening of the front shaft 11 ⁇ / b> A of the writing instrument body 4. At this time, the fitting between the annular outer peripheral portion 52 of the second stopper 50 and the opening 31 of the ink cartridge 3 is released. As a result, the second plug 50 is removed from the opening 31 of the ink cartridge 3 while the first plug 40 is still fitted.
  • the ink in the ink cartridge 3 is supplied to the internal space of the front shaft 11A through one through hole 61a and the tube 61. As the ink is supplied, air is pushed out from the inner space of the front shaft 11A. This air flows into the container 30 through the other pipe 61 and the through hole 61a. Thereafter, the internal pressure balance between the internal space of the front shaft 11A and the container 30 is maintained.
  • the ink supplied to the internal space of the front shaft 11 ⁇ / b> A is held by the ink storage 13 and supplied to the pen tip 12.
  • the ink cartridge 3 of this embodiment can be used for both the writing instrument body 2 (FIG. 1A) that is compatible with the ink leakage prevention mechanism and the writing instrument body 4 (FIG. 6A) that is not compatible with the ink leakage prevention mechanism. . That is, the ink cartridge 3 of this embodiment can be used for two types of writing instrument bodies 2 and 4 having different configurations for opening the stopper. Furthermore, the ink cartridge 3 of this embodiment is used for both the new writing instrument 1 (FIG. 1A) having an ink leakage prevention mechanism and the old writing instrument 100 (FIG. 6A) not having an ink leakage prevention mechanism. Fits.
  • the ink cartridge of this embodiment is characterized by the configuration of the first stopper 70 shown in FIG. 7A and the container 30 shown in FIGS. 7B to 7D.
  • the first plug 70 is fitted to the second plug 50 shown in FIG. 3B.
  • the first plug 70 and the second plug 50 constitute a single plug that seals the opening 31 of the container 30.
  • the first stopper 70 of the present embodiment is characterized by a configuration including a single ridge 72 that is continuous in a circle.
  • the rear surface of the collar 72 forms a contact surface 72a that is continuous in a circular shape.
  • the contact surface 72a that is continuous in a circle can contact the step portions 32a of all the ribs 32 formed in the container 30.
  • Such a ridge 72 makes it possible to reduce the number of ribs 32 formed in the container 30.
  • the number of ribs 32 formed in the container 30 can be reduced to four.
  • the four ribs 32 are arranged in the container 30 at equal intervals.
  • the step portions 32a of the four ribs 32 abut against the abutting surface 72a that is continuous in a circular shape at equal intervals, and restrict the rearward movement of the flange 72 in a balanced manner. That is, according to the ink cartridge of this embodiment, the ink leakage prevention mechanism can be effectively operated.
  • the configuration of the first plug 70 other than the collar portion 72 is substantially the same as that of the first plug 50 shown in FIG. 3A.
  • the plug main body 71 is fitted into an ink passage hole 51 a provided in the second plug 50.
  • a hole 71 a that opens only forward is formed in the plug body 71.
  • the hole 71a does not penetrate the plug body 71.
  • An annular recess 71b is provided on the inner peripheral surface of the hole 71a.
  • the hole 71a and the annular recess 71b constitute a female fitting portion for fitting with the small protrusion 22A of the writing instrument body 2 shown in FIG. 2A.
  • the distal end portion 71c of the plug main body 71 is slightly thinner.
  • the thin-walled distal end portion 71c is easily deformed by receiving an external force.
  • the distal end portion 71 c of the plug body 71 is smoothly fitted into the passage hole 51 a of the second plug 50.
  • an outer peripheral taper 71d and an inner peripheral taper 71d are formed on the circular end surface of the distal end portion 71c of the plug body 71.
  • the outer peripheral taper 71d guides the distal end portion 71c of the plug body 71 into the passage hole 51a of the second plug 50. Thereby, the front end portion 71 c of the plug body 71 is more smoothly fitted into the passage hole 51 a of the second plug 50.
  • the taper 71d on the inner periphery guides the small protrusion 22A of the writing instrument body 2 into the hole 71a of the stopper body 71.
  • the convex part 22a of the small protrusion 22A does not collide with the entrance of the hole 71a.
  • the protrusion 22a of the small protrusion 22A is more smoothly fitted into the annular recess 71b in the hole 71a.
  • fitting recesses 72a are provided radially at equal intervals.
  • the four fitting recesses 72a all have an arc shape.
  • the fitting recess 72 a is fitted to the cylindrical main body 51 of the second plug 50.
  • Four ink passages 72c are formed between the fitting recesses 72a.
  • FIGS. 11 and 12 The writing instrument body 5 of the present embodiment is shown in FIGS. 11 and 12.
  • the writing instrument body 5 is characterized by the configuration of the intermediate member 20 shown in FIG. 8A.
  • the writing instrument body 5 has both the ink cartridge 3 having the ink leakage prevention mechanism shown in FIG. 11 and the ink cartridge 3 not having the ink leakage prevention mechanism shown in FIG. Fits.
  • the configuration of the writing instrument body 5 other than the intermediate member 20 is the same as that of the writing instrument body 2 shown in FIGS. 1A and 1B. Therefore, in this embodiment, description about the structure of the writing instrument main body 5 other than the intermediate member 20 is abbreviate
  • the intermediate member 20 of the present embodiment has a partition wall in which two through holes 21a are formed.
  • a protrusion 22 is disposed at the center of the rear surface of the partition wall.
  • a small protrusion 22 ⁇ / b> A is provided at the tip of the protrusion 22.
  • the small protrusion 22A constitutes a male fitting portion for fitting with the first plugs 40 and 70 shown in FIG. 3A or 7A.
  • the plug bodies 41 and 71 of the first plugs 40 and 70 are provided with the holes 41a and 71a and the annular recesses 41b and 71b.
  • the holes 41a and 71a and the annular recesses 41b and 71b constitute a female fitting portion into which the small protrusion 22A is fitted.
  • the structure of the protrusion part 22 and the small protrusion 22A of this embodiment is the same as the structure of the intermediate member 20 of 1st Embodiment shown to FIG. 3C.
  • a first minute protrusion 22B, a second minute protrusion 22C, and a gap 22D are further provided at the tip of the small protrusion 22A of the intermediate member 20 shown in FIG. 8A.
  • the first microprotrusions 22B, the second microprotrusions 22C, and the gaps 22D make it possible to reliably open the plug 80 of the ink cartridge 3 that does not include the ink leakage prevention mechanism shown in FIG.
  • the first minute protrusion 22B is shifted from the center of the small protrusion 22A and is positioned on one side.
  • the first minute protrusion 22B protrudes rearward from the small protrusion 22A.
  • the first minute protrusion 22B has a length that does not contact the plug main bodies 41 and 71 when the small protrusion 22A is fitted into the holes 41a and 71a and the annular recesses 41b and 71b. (See height H1 shown in FIG. 9B).
  • the tip surface 22c of the first minute protrusion 22B has an area smaller than the horizontal sectional area of the first minute protrusion 22B in the vertical state (see the horizontal C1-C1 sectional line shown in FIG. 9B).
  • the area of the front end surface 22c of the first minute protrusion 22B is, for example, 0.9 mm 2 .
  • the two opposing side surfaces 22d and 22d of the first minute protrusion 22B are inclined from the distal end side of the first minute protrusion 22B toward the small protrusion 22A.
  • the first microprotrusion 22B having the above-described configuration has a function of reliably opening the plug 80 of the ink cartridge 3 that does not include the ink leakage prevention mechanism shown in FIG. That is, the first minute protrusion 22 ⁇ / b> B presses a portion off the center of the disk-shaped stopper 80. Thereby, the disk-shaped stopper 80 comes off from the inner peripheral surface of the opening of the container 30 and is rotated around the axis in the diameter direction.
  • the contact state between the tip surface 22c and the plug 80 becomes unstable. That is, the plug 80 is not in a stable state on the distal end surface 22c. As a result, the plug 80 pressed against the distal end surface 22c is reliably rotated about its diametrical axis.
  • the inclined side surfaces 22d and 22d of the first minute protrusion 22B serve as a guide for controlling the rotation direction of the plug 80. That is, the plug 80 pressed against the distal end surface 22c is rotated along the inclination of one of the two side surfaces 22d and 22d.
  • the second minute protrusion 22C is shifted from the center of the small protrusion 22A and located on the other side.
  • the second minute protrusion 22C protrudes rearward from the small protrusion 22A.
  • the second minute protrusions 22C have a shorter length than the first minute protrusions 22B (see height H2 shown in FIG. 9B). Similar to the first minute protrusion 22B, the second minute protrusion 22C does not contact the plug bodies 41 and 71 when the small protrusion 22A is fitted in the holes 41a and 71a and the annular recesses 41b and 71b.
  • the tip surface 22e of the second minute protrusion 22C has an area smaller than the horizontal sectional area of the second minute protrusion 22C in the vertical state (see the horizontal C2-C2 sectional line shown in FIG. 9B).
  • the width W2 of the tip surface 22e of the second minute projection 22C is smaller than the width W1 of the tip surface 22c of the first minute projection 22B.
  • the area of the tip surface 22e of the second minute protrusion 22C is, for example, 0.7 mm 2 .
  • the two opposing side surfaces 22f, 22f of the second minute protrusion 22C are inclined from the distal end side of the second minute protrusion 22C toward the small protrusion 22A.
  • the second microprotrusion 22C having the above-described configuration supports the dynamic function of the first microprotrusion 22B described above, and allows the disc-shaped plug 80 to be opened more reliably. That is, the tip surface 22 e of the short second minute protrusion 22 ⁇ / b> C serves as a fulcrum of the plug 80 that is detached from the inner peripheral surface of the opening of the container 30.
  • the plug 80 is pressed against the distal end surface 22c of the long first minute projection 22B and supported by the distal end surface 22e of the short second minute projection 22C. As a result, the plug 80 is deformed and becomes unstable.
  • the plug 80 in an unstable state is easily rotated along the inclined side surface 22d of the first minute protrusion 22B. Further, the rotation of the plug 80 is supported by the inclined side surface 22f of the second minute protrusion 22C, and a more reliable operation is achieved.
  • a gap 22D is formed between the second minute protrusion 22C and the first minute protrusion 22B. As shown in FIG. 9B, the gap 22D is shifted from the center of the small protrusion 22A and is located on the other side. As shown in FIG. 10, the gap 22 ⁇ / b> D corresponds to the cylindrical protrusion 81 provided at the center of the plug 80. A specific example of the dimensions of the cylindrical protrusion 81 and the gap 22D is shown in FIG.
  • the cylindrical protrusion 81 has a diameter of 2.6 mm and a length of 2.3 mm, for example.
  • the gap 22D has, for example, a width of 2.8 mm and a depth of 2.9 mm.
  • the gap 22D having the above configuration receives the cylindrical protrusion 81 in the process of opening the plug 80 by the first and second minute protrusions 22B and 22C, and restricts the rotatable direction of the cylindrical protrusion 81 in two directions. Thereby, the plug 80 is reliably rotated along the inclination of one of the two side surfaces 22d and 22d of the first minute protrusion 22B. That is, the operation of the plug 80 until it is released from the inner peripheral surface of the opening of the container 30 is precisely controlled by the first microprojection 22B, the second microprojection 22C, and the gap 22D.
  • the writing instrument body 5 of the present embodiment is compatible with the ink cartridge 3 provided with the ink leakage prevention mechanism shown in FIGS. 2A and 7 and can operate the ink leakage prevention mechanism normally.
  • the ink cartridge 3 provided with the first plug 70 of FIG. 7A will be exemplified to explain that the writing instrument body 5 of this embodiment is compatible with the ink cartridge 3 provided with the ink leakage prevention mechanism.
  • the writing instrument body 5 of the present embodiment is also compatible with the ink cartridge 3 provided with the first plug 40 of FIG. 3A, but detailed description thereof is omitted.
  • the ink cartridge 3 is inserted into the rear end opening of the front shaft 11A of the writing instrument body 5.
  • the protrusion 22 and the sealing connection 23 of the intermediate member 20 are inserted into the opening 31 of the ink cartridge 3.
  • the small protrusion 22A, the first and second minute protrusions 22B, 22C are inserted into the hole 71a of the first plug 70.
  • a step portion (see FIG. 11B) formed between the protrusion 22 and the small protrusion 22 ⁇ / b> A contacts the front end of the first plug 70.
  • the pair of convex portions 22 a of the small protrusion 22 ⁇ / b> A is fitted into any portion of the annular concave portion 71 b of the first plug 70.
  • the sealed connection portion 23 is inserted into the opening 31 of the ink cartridge 3.
  • the first and second microprotrusions 22B and 22C inserted into the hole 71a of the first plug 70 do not contact the plug body 71. That is, when the ink cartridge 3 having the ink leakage prevention mechanism is used for the writing instrument body 5, the first and second minute protrusions 22B and 22C are merely present in the hole 71a of the first plug 70, and the ink cartridge 3 is not affected at all. As a result, the attaching / detaching operation between the writing instrument body 5 and the ink cartridge 3 is exactly the same as in FIGS. 4A to 4F and FIGS. 5A to 5F.
  • the writing instrument body 5 of the present embodiment is adapted to the ink cartridge 3 that does not include the ink leakage prevention mechanism shown in FIG. 12, and reliably opens the disc-shaped stopper 80 provided with the cylindrical protrusion 81 at the center. Is possible.
  • the ink cartridge 3 is inserted into the rear end opening of the front shaft 11A of the writing instrument body 5.
  • the front end surface 22c of the long first microprotrusion 22B presses the portion off the center of the disk-shaped stopper 80.
  • the cylindrical protrusion 81 of the plug 80 is received in the gap 22D between the first and second minute protrusions 22B and 22C.
  • the tip surface 22e of the short second minute protrusion 22C does not contact the plug 80.
  • the sealed connection portion 23 is shallowly inserted into the opening 31 of the ink cartridge 3.
  • the ink cartridge 3 is further inserted into the rear end opening of the front shaft 11 ⁇ / b> A of the writing instrument body 5. Then, the disk-shaped stopper 80 pressed against the distal end surface 22 c of the long first minute protrusion 22 ⁇ / b> B comes off from the inner peripheral surface of the opening of the container 30. At this time, the plug 80 is pressed by the distal end surface 22c of the long first minute protrusion 22B and supported by the distal end surface 22e of the short second minute protrusion 22C. Thereby, the posture of the plug 80 is broken and becomes unstable. On the other hand, the sealed connection portion 23 is further inserted into the opening 31 of the ink cartridge 3.
  • the ink cartridge 3 is then completely inserted into the rear end opening of the front shaft 11A of the writing instrument body 5.
  • the plug 80 in an unstable state due to its posture is rotated about its diametrical axis.
  • the rotation direction of the plug 80 is limited to two directions in which the cylindrical protrusion 81 can rotate in the gap 22D.
  • the plug 80 is reliably rotated along the inclination of one of the two side surfaces 22d and 22d of the first minute protrusion 22B.
  • the rotation of the plug 80 is supported by the inclined side surface 22f of the second minute protrusion 22C, and the operation is more reliable.
  • the first microprotrusion 22B, the second microprotrusion 22C, and the gap 22D of the present embodiment can rotate the plug 80 to an inclination of about 45 °.
  • the sealed connection portion 23 is completely inserted into the opening 31 of the ink cartridge 3 and is tightly fitted to the inner peripheral surface of the opening 31.
  • the writing instrument body 5 of the present embodiment is used for both the ink cartridge 3 (FIG. 11) that conforms to the ink leakage prevention mechanism and the ink cartridge 3 (FIG. 12) that does not conform to the ink leakage prevention mechanism. It is possible. That is, the writing instrument body 5 of the present embodiment smoothes both the first plugs 40 and 70 of the ink cartridge 3 having the ink leakage prevention mechanism and the plug 80 of the ink cartridge 3 not having the ink leakage prevention mechanism. It can be opened. Therefore, immediately after switching the old product to the new product, both the new and old ink cartridges 3 can be used for the writing instrument body 5 of the new product even when two types of the new and old ink cartridges 3 are distributed in the market.
  • the writing instrument body 5 of the present embodiment can precisely control the operation of the disk-shaped stopper 80 by the first minute protrusion 22B, the second minute protrusion 22C, and the gap 22D.
  • the writing instrument main body 5 of this embodiment can open the disk-shaped stopper 80 reliably.
  • the first minute protrusion 22B, the second minute protrusion 22C, and the gap 22D of the present embodiment can be provided in an extremely small space.
  • the writing instrument main body 6 of the present embodiment is characterized in that only the first minute protrusions 22B are provided at the tips of the small protrusions 22A of the intermediate member 20.
  • the first minute protrusion 22B is shifted from the center of the small protrusion 22A and is located on one side.
  • the length of the first minute protrusion 22B is, for example, 2.7 mm. It is possible to open the disc-shaped stopper 80 provided with the cylindrical protrusion 81 at the center only by the first minute protrusion 22B.
  • the first microprotrusions 22B of the present embodiment can rotate the plug 80 at an inclination of about 50 °.
  • the intermediate member 20 of this embodiment also has the small protrusion 22A and the convex part similar to the intermediate member 20 of FIG. 3C and FIG. 8A. Therefore, like the writing instrument bodies 2 and 5 of the first and second embodiments, the writing instrument body 6 of this embodiment is also suitable for the ink cartridge 3 provided with the ink leakage prevention mechanism shown in FIGS. 2A and 7.
  • the first stoppers 40 and 70 can be operated in exactly the same manner as in FIGS. 4A to 4F and FIGS. 5A to 5F.

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  • Mechanical Engineering (AREA)
  • Pens And Brushes (AREA)
PCT/JP2016/084980 2015-11-30 2016-11-25 インキカートリッジ及び筆記具 WO2017094614A1 (ja)

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CN201680068332.0A CN108290439B (zh) 2015-11-30 2016-11-25 墨水芯以及笔具
BR112018010461-2A BR112018010461B1 (pt) 2015-11-30 2016-11-25 Cartucho de tinta e instrumento de escrita
JP2017553818A JP6596509B2 (ja) 2015-11-30 2016-11-25 インキカートリッジ及び筆記具

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TWI645987B (zh) * 2017-09-18 2019-01-01 順德工業股份有限公司 書寫工具

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JPH0438481U (zh) * 1990-07-30 1992-03-31
JP2002103874A (ja) * 2000-09-29 2002-04-09 Pentel Corp インキタンクの開栓構造
WO2014148445A1 (ja) * 2013-03-20 2014-09-25 株式会社パイロットコーポレーション 筆記具及びインキカートリッジ
JP2014200946A (ja) * 2013-04-02 2014-10-27 コクヨＳ＆Ｔ株式会社 カートリッジの取付構造
WO2015041202A1 (ja) * 2013-09-23 2015-03-26 株式会社パイロットコーポレーション 筆記具及びインキカートリッジ

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JP2002356089A (ja) * 2001-05-30 2002-12-10 Sugiura Senryoten:Kk 筆記具
JP4820704B2 (ja) * 2006-05-31 2011-11-24 パイロットインキ株式会社 筆記具及び筆記具用インキカートリッジ
JP4246787B1 (ja) * 2007-11-14 2009-04-02 ジット株式会社 インク貯蔵容器
JP2010253379A (ja) * 2009-04-02 2010-11-11 Pilot Ink Co Ltd 塗布具
CN201895480U (zh) * 2009-10-21 2011-07-13 上海白金制笔有限公司 一种直液式笔
JP5389709B2 (ja) * 2009-10-23 2014-01-15 パイロットインキ株式会社 筆記具用インキカートリッジ及びそれを用いた筆記具
JP6024325B2 (ja) * 2012-09-13 2016-11-16 コクヨ株式会社 筆記具
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JPH0438481U (zh) * 1990-07-30 1992-03-31
JP2002103874A (ja) * 2000-09-29 2002-04-09 Pentel Corp インキタンクの開栓構造
WO2014148445A1 (ja) * 2013-03-20 2014-09-25 株式会社パイロットコーポレーション 筆記具及びインキカートリッジ
JP2014200946A (ja) * 2013-04-02 2014-10-27 コクヨＳ＆Ｔ株式会社 カートリッジの取付構造
WO2015041202A1 (ja) * 2013-09-23 2015-03-26 株式会社パイロットコーポレーション 筆記具及びインキカートリッジ

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CN108290439B (zh) 2019-12-06
CN108290439A (zh) 2018-07-17
JPWO2017094614A1 (ja) 2018-09-20
JP6596509B2 (ja) 2019-10-23
TW201726438A (zh) 2017-08-01
BR112018010461A8 (pt) 2019-02-26
BR112018010461B1 (pt) 2022-04-26
BR112018010461A2 (pt) 2018-11-21
TWI689423B (zh) 2020-04-01

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