WO1999055539A1 - Instrument d'ecriture et procede de fabrication correspondant - Google Patents

Instrument d'ecriture et procede de fabrication correspondant Download PDF

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Publication number
WO1999055539A1
WO1999055539A1 PCT/JP1999/002298 JP9902298W WO9955539A1 WO 1999055539 A1 WO1999055539 A1 WO 1999055539A1 JP 9902298 W JP9902298 W JP 9902298W WO 9955539 A1 WO9955539 A1 WO 9955539A1
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WO
WIPO (PCT)
Prior art keywords
ink
slide
storage chamber
slide stopper
ink storage
Prior art date
Application number
PCT/JP1999/002298
Other languages
English (en)
Japanese (ja)
Inventor
Jiro Hori
Original Assignee
Hori R & D Co., Ltd.
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 Hori R & D Co., Ltd. filed Critical Hori R & D Co., Ltd.
Priority to AU36270/99A priority Critical patent/AU3627099A/en
Publication of WO1999055539A1 publication Critical patent/WO1999055539A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K7/00—Ball-point pens
    • B43K7/01—Ball-point pens for low viscosity liquid ink

Definitions

  • the present invention relates to a writing implement provided with a slide stopper that is movable in an ink storage chamber, and a method for manufacturing the writing implement. More specifically, the present invention can substantially reduce the above-mentioned sliding resistance of the slide plug to a moving resistance, and solves the problem caused by the sliding resistance of the sliding stopper. In addition, the present invention provides a writing instrument with high operation stability and a method for efficiently manufacturing such a writing instrument.
  • a writing implement provided with a slide stopper which is slidable in the ink storage chamber.
  • a substantially cylindrical ink storage chamber is formed in the writing instrument main body, and the tip side of the ink storage chamber is a ball chip, felt chip, or the like. It communicates with the pen body, and the rear end communicates with the atmosphere via a tail plug.
  • the ink storage chamber is filled with ink and accommodates a slide 2 which is free to slide.
  • This slide stopper is self-slidable in the axial direction while maintaining liquid tightness with the inner peripheral surface of the ink storage chamber.
  • the front-end portion filled with ink and the rear-end air that communicates with the atmosphere through the tail plug described above. Is divided into and. Therefore, when this ink expands and contracts due to a temperature change, the above-mentioned slide stopper slides to compensate for the expansion and contraction, and when the ink is consumed by writing or the like. In response, the slide stopper advances.
  • this slide stopper is generally formed of an elastic member such as silicone rubber in order to maintain liquid tightness with the inner peripheral surface of the ink storage chamber. Is pressed against the inner peripheral surface with a certain sealing contact pressure. Therefore, when this slide stopper slides, it is inevitable that a certain degree of sliding resistance is generated.
  • the rear end of the ink storage chamber is opened, that is, the ink storage chamber is not attached with the tail plug or the like. Hold the body almost vertically with the rear end side up. Then, a predetermined amount of ink is injected from the rear end of the ink storage chamber. Next, this ink storage A slide plug is inserted into the ink storage chamber from the rear end of the storage chamber, and the slide plug is pushed to the tip end side with a push rod or the like, and the previously injected slide plug is inserted. Advance to the liquid level of the ink.
  • the slide stopper may not be pushed all the way to the liquid level of the ink, and air may remain between the slide stopper and the liquid level of the ink. Occurs. For this reason, in the past, this slide stopper was pushed slightly below the liquid level of the ink, and excess ink was removed from the outer peripheral surface of the slide stopper and the ink storage chamber. It was trying to overflow from between the inner circumference.
  • the spilled ink adheres to the inner surface of the ink storage chamber on the air side, and flows out from the air communication hole of the tail plug to the outside, or if the wall of the ink storage chamber is transparent.
  • the spilled ink causes the inside surface to become dirty and markedly impair the appearance, causing a problem.
  • a process such as suctioning and removing the overflowed ink with a small-diameter nozzle and wiping off the ink adhered to the inner surface of the ink storage chamber is required.
  • the process of filling the ink and inserting the slide stopper became extremely inefficient. Disclosure of the invention
  • the present invention has been made on the basis of the above-described circumstances, and thus the sliding resistance is substantially reduced to zero to reliably prevent the above-described problems, and to supply and write ink.
  • a writing instrument capable of stabilizing the movement and sealing action of the slide stopper, and efficiently producing such a writing instrument. This is to provide a manufacturing method that can be used.
  • the slide stopper has a floating property with respect to the ink stored in the ink storage chamber.
  • the outer diameter of the lid is formed to be smaller than the inner diameter of the ink storage chamber, and the space between them is maintained in a substantially non-contact state.
  • an ink or non-volatile liquid film is interposed between the outer peripheral surface of the slide stopper and the inner peripheral surface of the ink storage chamber, and these are substantially non-conductive. Maintained in contact. Therefore, when the slide stopper moves, only the viscous resistance of the intervening liquid film is generated. Such viscous drag is proportional to the moving speed of the slide plug, and the moving speed of the slide plug due to consumption of the temperature change ink is extremely small. Thus, the viscous resistance of the intervening liquid film is substantially close to zero, and becomes negligibly small. Therefore, the above-mentioned problem due to the sliding resistance of the slide stopper can be reliably prevented.
  • the sealing force of the liquid film interposed in the gap between the outer periphery of the slide stopper and the inner periphery of the ink storage chamber corresponds to the capillary force in this gap, and the sealing force of the liquid film is maintained. Retention is generally low.
  • the capillary force when this liquid film is drawn into the gap is relatively large, but the capillary force when this liquid film is pushed out from the gap is small. Therefore, when the writing instrument is in the upright position, the slide stopper is settled in the ink by its own weight, and the outer periphery of the slide stopper and the inner periphery of the ink storage chamber are set. The ink below the slide plug is pushed upward through the gap between and the slide plug is pushed out. It may settle down to the tip of the tank.
  • the slide stopper since the slide stopper has a property of floating in the ink, that is, has a floating property, the writing instrument is set in the upright state as described above. However, this slide plug is kept floating on the liquid surface of the ink, and does not cause the above-mentioned sedimentation.
  • the slide stopper has a hollow shape, for example, and the apparent specific gravity of the whole is smaller than the specific gravity of the ink. It is more buoyant.
  • the slide plug is formed of a material having a lower specific gravity than the above-mentioned ink, and thereby, is provided with a floating property.
  • a buoyant body having a specific gravity smaller than that of the ink and giving a floating property to the slide stopper is accommodated.
  • the slide stopper is provided with a floating property.
  • the invention according to claim 5 is characterized in that a partition groove that is continuous in the circumferential direction is formed at an intermediate portion in the axial direction of the slide plug.
  • the slide stopper can be moved. It moves to the front end side, and finally moves to the front end of this ink storage chamber, and all the ink flows out to the rear end side of this ink storage chamber. .
  • the partition groove which is continuous in the circumferential direction is formed on the outer periphery in the axial direction of the slide plug, the above-described problems can be prevented. That is, since a liquid film exists in the gap on both sides in the partition groove, the inside of the partition groove becomes a sealed space, and the air is sealed inside the partition groove. Therefore, when the ink flows from the ink side through the lower gap, the ink first flows out into the partition groove to compress the internal air. Pressure increases. Therefore, the rise in the pressure in the partition groove stops the flow of the ink through the lower gap, thereby preventing the above-described problems.
  • the slide stopper is provided with a plurality of, for example, two stoppers disposed so as to form a gap in the axial direction, and the stoppers. And a connecting member for connecting a substantially central portion of the body portion, and a gap between these two plug portions is formed in the partition groove. Therefore, an intermediate product is manufactured by forming a gap between the long linear connecting members to form a large number of plugs, and the above linear connection is made at two positions of the plugs. By cutting the member, such a slide wire can be manufactured efficiently.
  • the slide stopper is constituted by a plurality of, for example, two slide stopper main bodies which are arranged apart from each other in the axial direction. A gap between the two slide plug main bodies is formed in the partition groove.
  • the outer peripheral edge on the air side of the outer peripheral surface is formed as a blade-like edge having a sharp edge angle in cross section. It is characterized by what has been done.
  • the free surface of the liquid held in the gap is held by the steps or bends of the wall forming the gap, and the greater the angle of this bend, the more the retained force strong. Therefore, the free surface of the ink or the non-volatile liquid held in the gap around the outer periphery of the slide stopper is formed at the position of the above-mentioned edge and strongly at the position of the bracket. Since the liquid is held, the sealing force of the liquid interposed in the gap is strong, and when the writing instrument is left in a horizontal position, the slide stopper may undesirably move to the pen body side. This is prevented. In addition, if the writing instrument is dropped on the floor or the impact is applied, the ink etc. in this gap will be empty. It can be prevented from scattering into the air-side room.
  • the present invention described in claim 9 is characterized in that the end on the ink side of the slide stopper is formed in a convex shape. Therefore, when the ink is injected into the ink storage chamber first, and then the slide stopper is inserted, the air between the slide stopper and the liquid level of the ink is set. Is pushed out to the surroundings by this convex part and exhausted from the gap, and the air is enclosed as air bubbles between the tip of the slide stopper and the ink. And are prevented.
  • the present invention according to claim 10 is characterized in that a weight that is movable in the axial direction is accommodated in the ink storage chamber. Therefore, the weight was used to agitate the ink in the ink storage chamber, and at the same time, the writing implement was dropped onto the floor with the tail plug facing downward. In such a case, the impact causes the weight to come into contact with the slide stopper and press it toward the tail plug side, thereby creating a negative pressure in the ink storage chamber. This negative pressure pulls back the ink and the like in the gap on the outer periphery of the slide plug, and prevents the ink from scattering into the room on the air side.
  • the process of injecting ink to a predetermined liquid level into this ink storage chamber while keeping it dry without adhering, and inserting a dry slide stopper from the upper end of this ink storage chamber And the inside of the ink storage chamber below this slide stopper A process of lowering the slide stopper by gravity while discharging air from a gap between an outer peripheral surface of the slide stopper and an inner peripheral surface of the ink storage chamber; and When the slide stopper descends to the liquid level of the ink, the ink penetrates into the gap between the slide stopper and the ink storage chamber to fill the gap.
  • the slide stopper does not descend below the liquid level of the ink, and the ink does not overflow above the slide stopper. Therefore, it is not necessary to remove the overflowed ink by suction or to wipe off the ink attached to the inner surface of the ink storage chamber, so that the writing implement can be efficiently and reliably manufactured.
  • the slide stopper in the step of lowering the slide stopper, the slide stopper is lowered by gravity and the slide stopper is lowered. Dock reaches near ink level Mechanically descends with a push rod or the like until it reaches the maximum speed. Therefore, manufacturing is more efficient.
  • the method according to the present invention according to claim 13 is characterized in that after the slide stopper is floated on the liquid surface of the ink in the ink storage chamber, the slide stopper is provided.
  • the non-volatile liquid is dropped into the gap between the outer peripheral surface of the slide stopper and the inner peripheral surface of the ink storage chamber by dropping the slide stopper. Therefore, the non-volatile liquid can be more easily and efficiently interposed in the gap, and the drying of the ink can be more effectively prevented.
  • the tip surface of the slide stopper is convex, and the slide stopper is connected to an ink or a non-volatile liquid.
  • the liquid level reaches the liquid level, the air between this liquid level and the tip of the slide stopper is removed to the surroundings. Therefore, it is possible to reliably prevent air from remaining as bubbles at the tip of the slide stopper.
  • FIG. 1 is a longitudinal sectional view of a writing instrument according to a first embodiment of the present invention.
  • Fig. 2 is a vertical cross-sectional view of the slide stopper part of Fig. 1 in an upright state.
  • Fig. 3 is a longitudinal sectional view of the slide stopper part of Fig. 1 in an inverted state.
  • Fig. 4 is a vertical cross-sectional view of the slide stopper of Fig. 1 in a horizontal state.
  • Fig. 5 is a vertical sectional view of the slide stopper in Fig. 1 in a horizontal state.
  • FIG. 6 is a longitudinal sectional view of a portion of the ink adjusting mechanism of FIG.
  • FIG. 7 is a longitudinal sectional view for explaining the operation of the ink adjusting mechanism.
  • FIG. 8 is a longitudinal sectional view for explaining the operation of the ink adjusting mechanism.
  • FIG. 9 is a longitudinal sectional view for explaining the operation of the ink adjusting mechanism.
  • FIG. 10 is a longitudinal sectional view for explaining the operation of the ink adjustment mechanism.
  • FIG. 11 is a schematic longitudinal sectional view showing a manufacturing process of the writing instrument according to the first embodiment.
  • FIG. 12 is a schematic longitudinal sectional view showing the manufacturing process of the writing instrument according to the first embodiment.
  • FIG. 13 is a schematic longitudinal sectional view showing a manufacturing process of the writing instrument according to the first embodiment.
  • FIG. 14 is a schematic longitudinal sectional view showing the manufacturing process of the writing instrument according to the first embodiment.
  • FIG. 15A and FIG. 15B are longitudinal sectional views of the slide stopper according to the second embodiment.
  • FIG. 16A and FIG. 16B are longitudinal sectional views of a slide stopper according to the third embodiment.
  • FIG. 17 is a longitudinal sectional view of a slide stopper according to a fourth embodiment.
  • FIG. 18 is a longitudinal sectional view of a slide stopper according to a fifth embodiment.
  • FIG. 19 is a longitudinal sectional view of a slide stopper according to a sixth embodiment.
  • FIG. 20 is an illustration of a method for manufacturing a slide stopper according to the sixth embodiment.
  • FIG. 20 is an illustration of a method for manufacturing a slide stopper according to the sixth embodiment.
  • FIG. 21 is a longitudinal sectional view of a writing instrument according to a seventh embodiment.
  • FIG. 22 is a longitudinal sectional view of a writing instrument according to the eighth embodiment.
  • FIG. 23 is a longitudinal sectional view of a writing instrument according to the ninth embodiment.
  • FIG. 24 is a vertical cross-sectional view of a slide stopper portion of the writing instrument according to the tenth embodiment.
  • FIG. 25 is a longitudinal sectional view of the writing instrument of the eleventh embodiment.
  • FIG. 26 is a longitudinal sectional view of a slide stopper portion of the writing instrument according to the eleventh embodiment.
  • FIG. 27 is an enlarged vertical cross-sectional view of a slide stopper portion of the writing instrument according to the eleventh embodiment.
  • FIG. 28 is an enlarged longitudinal sectional view of a slide stopper portion of the writing instrument according to the eleventh embodiment.
  • FIG. 29 is an enlarged vertical cross-sectional view of a slide stopper portion of the writing instrument according to the 12th embodiment.
  • FIG. 30 is a longitudinal sectional view of a slide stopper portion of the writing instrument according to the thirteenth embodiment.
  • FIG. 31 is a longitudinal sectional view of a slide stopper part of the writing instrument according to the fourteenth embodiment.
  • FIG. 32 is a longitudinal cross-sectional view of a slide stopper part of the writing instrument according to the fifteenth embodiment.
  • FIG. 33 is an explanatory view of a manufacturing method using the slide stopper of the fifteenth embodiment.
  • FIG. 34 is an explanatory diagram of a manufacturing method using the slide stopper of the fifteenth embodiment.
  • FIG. 35 is an explanatory diagram of a manufacturing method using the slide stopper according to the fifteenth embodiment.
  • FIG. 36 is an explanatory diagram of a manufacturing method using the slide stopper of the fifteenth embodiment.
  • FIG. 37 is an explanatory diagram of a manufacturing method using the slide stopper according to the fifteenth embodiment.
  • FIG. 38 is a longitudinal cross-sectional view of a portion of the writing instrument slide II of the 16th embodiment.
  • FIG. 39 is a longitudinal sectional view of a slide stopper portion of the writing instrument according to the seventeenth embodiment.
  • FIG. 40 is a longitudinal sectional view of a slide stopper portion of the writing instrument according to the eighteenth embodiment.
  • FIGS. 1 to 14 show a writing instrument according to a first embodiment of the present invention and a method for manufacturing the same.
  • This embodiment is a ball-tip type writing instrument using a quick-drying ink.
  • Reference numeral 1 in the figure denotes a main body of the writing instrument, and the main body 1 has a substantially cylindrical shape, and has a cylindrical ink storage chamber 2 formed therein.
  • the ink storage chamber 2 is filled with an ink 10 and a slide stopper 11 having a structure as described later is provided in the axial direction itself. Reply Then, by the slide stopper 11, the interior of the ink reservoir 2 is filled with the ink 10 and the air side chamber 3 of the air. Divided into and You.
  • the wall of the main body 1 is made of a transparent synthetic resin material or the like, and is configured so that the remaining amount of the ink inside can be visually recognized from the outside.
  • the tip of the main body 1 is provided with a chip holder 4 and a pen body, for example, a ball chip 5, which is held by the chip holder.
  • the ball chip 5 is used for ink adjustment described later. It communicates with the tip of the ink storage chamber 2 via the mechanism 12.
  • a tail plug 6 is attached to the rear end of the main body 1, and the tail plug 6 is formed with an outflow prevention pipe 8 protruding inward and an air communication passage 7 formed at the center thereof.
  • the air side chamber 3 on the air side in the ink storage chamber 2 is communicated with the atmosphere through the air communication hole 7. Further, a cap 9 is fitted to the tip of the main body 1.
  • Such a writing instrument is used when the ink 10 in the ink storage chamber 2 expands and contracts due to a change in temperature, or when the ink 10 is consumed by writing.
  • the above-mentioned slide plug 11 force moves in the axial direction with substantially zero resistance to compensate for the volume change of this ink 10 and keeps the pressure of this ink 10 constantly. Maintain pressure equal to atmospheric pressure.
  • the ink in the ink storage chamber 2 is adjusted and compensated for by a head pressure and a flow rate by an ink adjusting mechanism 12 described later, and the pen body, for example, a ball tip 5 and stable writing is done.
  • the slide plug 11 is composed of a first plug body 21 formed of a synthetic resin material and a second plug body 22. These are in the form of hollow cups.
  • the first plug part 21 has a cylindrical fitting projection 23 protruding from the body, and the fitting projection 23 is provided with the second plug body. It is fitted integrally with the inner surface of the part 22 while maintaining the liquid tightness. Therefore, the slide stopper 11 has a sealed hollow structure.
  • the apparent specific gravity of the entire slide plug 11 is formed to be smaller than the specific gravity of the ink 10 described above, and due to its buoyancy, the ink 1 has a lower specific gravity. It has the property of floating on the liquid surface of No. 0, that is, has floating properties.
  • the slide stopper 11 is such that its buoyancy and its own weight are balanced with the second stopper part 22 submerged in the ink. It has such floating properties.
  • the outer diameter of the slide plug 11, that is, the outer diameter of the first and second plug body portions 21 and 22 is smaller than the inner diameter of the ink storage chamber 2.
  • a predetermined gap G is formed between the outer peripheral surface of the plug body 21, 22 and the inner peripheral surface of the ink storage chamber 2, and these surfaces are substantially non-conductive. It is configured to be kept in contact.
  • a partition groove 24 continuous in the circumferential direction is formed in an intermediate portion in the axial direction of the slide plug 11.
  • the leading end surfaces of the first and second plug portions 21 and 22 are separated from each other by a predetermined distance, and these leading end surfaces and the aforementioned
  • An outer peripheral surface of the fitting projection 23 forms a partitioning groove 24 having a substantially rectangular cross section.
  • the outer peripheral surface of the second plug body 22 and the ink storage An ink 10 is interposed and held in a gap G between the inner peripheral surface of the chamber 2 and a liquid film by a capillary force, and a substantially non-contact state between them is maintained.
  • the gap between the outer peripheral surface of the first plug body 21 and the inner peripheral surface of the ink storage chamber 2 contains a non-volatile liquid, for example, silicone oil 1. 3 is interposed and held in the form of a liquid film by capillary force, and maintains a substantially non-contact state therebetween.
  • the above-mentioned ink 10 or silicone oil 13 is contained in this section groove 24 by capillary force. As a result, it is not interposed and held, and the inside of the section groove 24 is in a state in which air is sealed therein.
  • the slide stopper 11 is always filled with the liquid film ink 10 or the silicone oil 13 between the inner peripheral surface of the ink reservoir 2 and the slide stopper 11. Since this slide stopper 11 is interposed and maintained in a substantially non-contact state, when the slide stopper 11 moves, there is no frictional resistance, and only the viscous resistance due to the viscosity of the liquid film. appear.
  • the viscous drag of such a fluid is proportional to the shear rate of the fluid, ie, the moving speed of the slide plug 11.
  • the slide stopper 11 moves in the axial direction in response to the expansion and contraction of the ink 10 due to a temperature change and the consumption of the ink 10 by writing. Is extremely small. Therefore, when the slide stopper 11 moves as described above, the viscous resistance of these liquid films is extremely small, substantially zero, and negligibly small.
  • the slide stopper 11 is opened. Since the movement resistance is substantially negligible when moving, no positive or negative pressure is generated in the ink 10 and the pressure of the ink 10 is always exactly the atmospheric pressure. Is maintained at the same pressure. Therefore, this ink is pushed out from the ball tip 5 and causes dropping of the button, or the ink pen is in a state of the ink and the handwriting becomes undesirably thick. In addition, it is possible to reliably prevent air from being sucked into the ink storage chamber 2 from the five-chip ball tip, and the handwriting from being worn as an ink poor.
  • the ink 10 passes through this gap. Since the solvent vapor does not evaporate, the ink is prevented from drying, and a quick-drying ink having an extremely short drying time can be used.
  • the slide stopper 11 is maintained in a substantially non-contact state with the inner peripheral surface of the ink storage chamber 2, and the movement resistance is substantially reduced. Therefore, the slide stopper 11 may move undesirably.
  • the slide plug 11 of the present invention employs the following configuration in order to prevent such a problem.
  • Figure 2 shows a case where the writing instrument is in an upright posture.
  • the slide plug 11 acts on the ink storage chamber 2 with a load descending toward the distal end.
  • the conventional slide stopper since it is in contact with the inner surface of the ink storage chamber, frictional resistance is generated and the ink is sealed on the sliding surface. Therefore, with the conventional slide stopper, the above frictional resistance The ink in the reservoir and the ink reservoir is completely sealed. This slide stopper does not fall under its own weight.
  • the slide stopper 11 of the present invention has substantially no movement resistance and has a gap G with the inner surface of the ink storage chamber 2. Since the liquid film of ink and silicone oil is only held by capillary force, its sealing force is small. Therefore, due to the weight of the slide plug 11, the ink 10 in the ink storage chamber 2 ⁇ ; this slide plug passes through the gap G. There is a possibility of spilling over 1 1. In such a case, the slide plug 11 sinks down into the ink chamber 2 to the tip, and all the ink 10 passes through the gap G described above. It may overflow above 1 1.
  • the slide plug 11 of the present invention has a hollow shape as described above, and its apparent specific gravity is smaller than the specific gravity of the ink 10. You. For this reason, the slide stopper 11 is likely to float on the liquid surface of the ink 10 due to its buoyancy and to cause the above-described sedimentation.
  • Figure 3 shows the writing instrument in an inverted posture.
  • a load is applied to slide plug 11 due to its own weight, and also to ink 10 due to its own weight, which descends toward tail plug 6.
  • the ink 10 is an incompressible force
  • the slide stopper 11 is slightly lowered, the inside of the ink storage chamber becomes a negative pressure.
  • the head pressure of the ink 10 the weight of the slide plug 11, and the negative pressure are different.
  • slide this stopper 1 1 In position, the pressure of ink 10 is equal to the atmospheric pressure. Therefore, in this case, the slide stopper 11 does not descend toward the tail 6 side.
  • Figures 4 and 5 show the case where the writing instrument is in a substantially horizontal posture.
  • an ink head pressure corresponding to the diameter of the ink storage chamber 2 acts between the upper part and the lower part of the ink chamber 2.
  • the diameter of the ink storage chamber 2 is about 10 to 2 Om m, and the head pressure generated is very small. Therefore, at this level of head pressure, the gap G between the slide stopper 11 and the inner peripheral surface of the ink storage chamber 2 has an inner portion corresponding to an upper portion of the gap G.
  • the sealing force due to the capillary force of the liquid film of the oil film 13 or silicone oil 13 is not broken, and air is sucked into the ink storage chamber 2 from the upper part of the gap G. What can be done.
  • a positive pressure due to the head pressure acts on the lower side of the gap G, and a pressure acts in a direction in which ink or silicone oil is pushed out from the gap G.
  • the holding force of the liquid film held in the gap G by the capillary force is small in the pushing direction.
  • the inner surface of the ink storage chamber 2 is a hydrophilic surface and the inner surface of the air-side chamber 3 is moist with ink, the lower part of the gap G is in the gap.
  • the holding force of the liquid film due to the capillary force is very small, and even a small pressure causes the ink to flow out so as to seep out.
  • the slide stopper 11 since the sliding resistance of the slide stopper 11 is substantially zero, the ink storage chamber 2 is located in the lower portion of the gap G. Even when a slight head pressure corresponding to the diameter is applied, the ink leaks out from the lower part of the gap G to the air side chamber 3 on the tail plug side, so that the ink flows out. In response to the outflow of the ink, the slide stopper 11 advances in the ink storage chamber 2 to the distal end side. Therefore, when this writing instrument is left in a horizontal position for a long time, the slide stopper 11 advances to the tip of the ink storage chamber 2, and all the ink flows into the air side chamber 3. May be lost.
  • the slide plug 11 of the present invention has a partition groove 24 continuous in the circumferential direction at an intermediate portion in the axial direction of the slide plug 11 in order to prevent the above-mentioned problems. Is formed. On both sides of the partitioning groove 24, first and second plug portions 21 and 22 are disposed, and a gap G between the outer peripheral surface thereof and the inner peripheral surface of the ink storage chamber 2 is formed. Is sealed with a liquid film of ink or silicone oil interposed. Therefore, the inside of the partitioning groove 24 is a sealed space, and the inside space is filled with air.
  • the discharged ink accumulates in the partition groove 24. Compress the air enclosed inside.
  • the head pressure corresponding to the diameter of the ink storage chamber 2 is extremely small, a small amount of ink flows out into the partition groove 24 to slightly remove the air therein.
  • the pressure in the partition 24 becomes balanced with the above-mentioned head pressure, and the outflow of ink from below the gap G stops.
  • the pressure in the partition groove 24 is equal to the pressure of the first and second plugs.
  • the slide stopper 11 does not move due to the pressure change in the partition groove 24 because it acts on the end faces of the minutes 21 and 22 in opposite directions.
  • the slide stopper 11 is substantially in a non-contact state with the inner peripheral surface of the ink storage chamber 2 and has a movement resistance of substantially zero.
  • the slide stopper 11 moves undesirably, and the ink leaks to the tail stopper 6 side. And are reliably prevented.
  • the dimensions of the slide stopper 11 and the ink storage chamber 2 are set as appropriate according to the characteristics of the ink used and the type of writing instrument. It is preferable that the dimensional relationship is set as follows.
  • the gap G between the outer peripheral surfaces of the first and second plug portions 21 and 22 of the slide plug 11 and the inner peripheral surface of the ink storage chamber 2 is substantially In order to maintain a non-contact state, it is preferable that the distance is 0.02 mm or more. If the gap G is smaller than this, although the above-described operation is theoretically achieved, the slide stopper 11 and the ink are not connected due to actual manufacturing errors of the product and other relations. There is a possibility that the inner peripheral surface of the storage chamber 2 comes into direct contact with the inner peripheral surface of the storage chamber 2. As described above, there is a possibility that the movement resistance of the slide plug 11 cannot be made substantially zero.
  • the gap G should be at least 0.04 mm. It is preferable that
  • the upper limit of the gap G is determined by the limit at which the liquid film can be held by the capillary force in this gap.
  • the upper limit of the gap G is determined by the properties such as viscosity and surface tension of a non-volatile liquid such as ink silicone oil to be used. and considering the characteristics of the down click, 0. 5 mm Shi in and this is preferred is less Rere 0
  • the inner volume of the above-mentioned partitioning groove portion 24 is set in accordance with the inner volume of the above-mentioned gap G. If the inner volume of the partitioning groove portion 24 is large, the amount of ink flowing out before the air inside the partitioning groove is compressed and balanced with the head pressure becomes large, which is not preferable. In addition, as described above, the inner volume of the partition groove 24 is small, and the ink or silicone oil is filled in the partition groove 24 during manufacturing or during use. The function of the partition groove 24 is degraded. Generally, the inside of this section groove 24 The volume is preferably at least three times the internal volume of the gap G between the second plug body 22 and the inner circumference of the ink storage chamber 2.
  • the writing implement of the first embodiment is provided with the above-described ink adjusting mechanism 12 for adjusting the supply of ink to the ball tip 5.
  • this writing implement as described above, the movement of the slide stopper 11 does not cause a pressure difference between the ink storage chamber 2 and the atmospheric pressure, but this writing implement is set up.
  • a pressure corresponding to the water head pressure of the ink 10 in the ink storage chamber 2 acts on the ball chip 5, and the ball chip 5 is There is a possibility that the handwriting may become undesirably dark due to the state described above, and this ink adjustment mechanism 12 prevents this.
  • the structure and operation of the ink adjusting mechanism 12 will be described with reference to FIGS. 6 to 10.
  • a first relay core 30 and a second relay core 31 made of a porous material such as a fiber bundle are provided in the ink passage inside the pen holder 4, and the first relay core 31 is provided.
  • the upper end of the relay core 30 communicates with the ink reservoir 2, and the lower end of the second relay core 31 communicates with the ball chip 5.
  • the lower end of the first relay core 30 and the upper end of the second relay core 31 are separated from each other, and are surrounded by these ends and the inner peripheral surface of the pen holder 4.
  • An air valve chamber 32 is formed.
  • An annular first gap S is formed between the outer peripheral surface of the first relay core 30 and the inner peripheral surface of the pen body holder 4.
  • An annular second gap R is formed between the outer peripheral surface and the inner peripheral surface of the pen holder 4.
  • the second The upper end of the relay core 31 is formed in a shape cut off obliquely. Then, air is sealed in the air valve chamber 32.
  • an ink 10 is provided in the gap S between the first intermediate core 30 and the gap R between the second intermediate core 31 as described above.
  • the air is held by the capillary force, and air is sealed in the air valve chamber 32.
  • a free surface 33 of the ink 10 is formed, and the surface tension of the free surface 33 causes the first surface to have a free surface.
  • the head pressure of the ink 10 up to the lower end of the relay core 30 is maintained. Therefore, the head pressure acting on the ball tip 5 is the head pressure from the upper end of the second relay core 31 to the ball tip 5, and the pressure is small. This prevents the ball chip 5 from becoming in an ink-rich state.
  • This method uses the fact that a gap is formed between the above-mentioned slide stopper 11 and the inner surface of the ink storage chamber 2 in a non-contact manner to fill the ink of the writing implement. This will make the process of inserting the slide plug more efficient and secure.
  • the basic method of manufacturing a writing instrument using such a slide plug is to attach a bent body or other parts to the tip of the writing instrument body.
  • the tail plug Before installing the tail plug, hold the writing instrument with the pen end side down with the rear end of the ink storage chamber open, and hold the ink storage tank in this state. Inject the ink into the room, then insert the slide stopper, and then attach the tail stopper.
  • the injection nozzle is inserted into the ink storage chamber 2 inside the main body 1 held substantially vertically as described above from the rear end side thereof. Insert 40, inject ink 10 to the specified position, and then withdraw injection nozzle 40. In this case, the ink should not adhere to the inner surface of the ink storage chamber 2 located above the liquid level of the ink 10, and the inner surface should be kept dry. .
  • the slide stopper 11 is inserted from the upper end of the ink storage chamber 2.
  • the outer periphery of the slide stopper 11 is also kept free from ink and the like, and is kept dry. Since a gap is formed between the slide stopper 11 and the inner peripheral surface of the ink storage chamber 2 as described above, the air below the slide stopper 11 is It is discharged upward through this gap. Therefore, the slide stopper 11 descends by its own weight and descends to the liquid level of the ink 10. In this case, the slide stopper 11 is pushed down mechanically with the push rod 41 etc. to increase the descent speed, and the slide stopper 11 reaches the ink level of the ink 10. The pushing by the push rod 41 may be stopped before and the slide stopper 11 may be lowered by its own weight afterward.
  • a non-volatile oil such as silicone oil is injected into the liquid surface of the ink.
  • silicone oil is allowed to enter the gap on the outer periphery of the slide plug 11, it may take a long time to enter the gap due to its viscosity and the like.
  • the push rod 41 as described above is used.
  • the nozzle 42 is inserted from the upper end force of the ink storage chamber 2, and the first plug body 21 of the slide plug 11 is connected to the nozzle 21.
  • Silicon oil 13 is supplied to the gap between the ink storage chamber 2 and the inner peripheral surface thereof, and the silicone oil is held in the gap by capillary force.
  • the lower air is discharged upward through a gap between the inserted slide stopper 11 and the inner peripheral surface of the ink storage chamber 2, so that this slide is used.
  • the stopper 11 quickly descends even with its own weight alone, floats on the liquid surface of the ink 10 at the position where it reaches the liquid surface of the ink 10, and stops automatically. Therefore, Unlike the case where the slide stopper is forcibly lowered by a push rod or the like, the ink does not overflow above the slide stopper, so that the slide stopper does not overflow. There is no need to suction the ink that has overflowed or wipe off the ink that has adhered to the inner surface of the ink storage chamber, and the filling process of this ink and the opening of the slide stopper are not required. It can be more efficient.
  • the slide stopper floats at the liquid level of the ink and stops automatically as described above, so that the ink storage chamber 2 is filled. Even if there is some variation in the amount of ink to be applied and the position of the liquid surface is not constant, there is no particular problem and the production becomes easy.
  • the present invention is not limited to the first embodiment.
  • the structure of the above-mentioned slide stopper 11 is not limited to the above, and various structures can be employed.
  • FIGS. 15A and 15B show the structure of the slide stopper according to the second embodiment of the present invention.
  • this slide plug 11 is made up of the first plug portion 51 having the lower end closed and the upper end, that is, the air side open, being connected to the second plug portion. 2, and the upper end of the first plug body portion 51 is closed by the wall member 52.
  • the wall member 52 is omitted as shown in FIG. 15B. You can also do it.
  • FIGS. 16A and 16A show the structure of the slide plug according to the third embodiment.
  • this slide plug 11 integrally forms first and second plug body portions 55, 56 and a partitioning groove portion 24, and has upper and lower end portions thereof. Is closed by a wall member 57 to form a hollow shape. Since the upper end of the first plug portion 55 on the air side does not have a possibility that the ink enters, the wall member 57 at the upper end is omitted as shown in FIG. 16B. be able to.
  • the configuration of this embodiment is the same as that of the slide plug of the first embodiment except for the above points, and is the same as the slide stopper of FIGS. 16A and 16B. Portions corresponding to those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
  • FIG. 17 shows the structure of the slide plug according to the fourth embodiment.
  • This slide plug 11 is formed by joining two plug members 58 of the same cup shape with their open ends butted together by ultrasonic welding or the like. It is formed with a lid 11.
  • steps are formed on the outer periphery of the ends of the plug portions 58, and the stepped portions are abutted to form the dividing grooves 24.
  • the welding wire 59 of the above-mentioned ultrasonic welding or the like may have a projection or the like, but since the welding wire 59 corresponds to the bottom surface of the partitioning groove 24, the welding wire 59 may be used. Even if the burrs and the like protrude, there is no problem in the operation such as the movement of the slide wire 11.
  • FIG. 18 shows the structure of the slide plug according to the fifth embodiment.
  • the slide stopper 11 is made of a material having a lower specific gravity than the ink, such as a closed-cell resin foam, for example. It has a solid structure in which the body parts 21 and 22 and the partition groove 24 are formed integrally. Since the inside is solid, the floatability is not impaired due to damage or the like, and the reliability is high.
  • the configuration of this embodiment is the same as that of the slide plug of the first embodiment except for the above points, and corresponds to the first embodiment in FIG.
  • the same reference numerals are given to the portions, and the description is omitted.
  • FIG. 19 and FIG. 20 show a slide plug 11 of the sixth embodiment. This is achieved by connecting two cylindrical plugs 61 made of a material having a low specific gravity, such as a closed-cell resin foam, with a rod-shaped connecting member 62 penetrating the center. A gap is formed between the end faces of these plug portions 61, and this gap is formed as a partition groove 24.
  • a material having a low specific gravity such as a closed-cell resin foam
  • an intermediate product in which a plurality of plug portions 61 are formed at predetermined intervals on a long connecting member 62 is manufactured, and the cutting product shown in FIG.
  • the connecting member 62 is cut off at the position of the line C, and these plug portions 61 are separated by two to produce a slide plug 11 as shown in FIG. 19.
  • the configuration of this embodiment is the same as that of the slide plug of the first embodiment except for the above points, and the parts corresponding to those of the first embodiment in FIG. Are given the same reference numerals and their description is omitted.
  • FIG. 21 shows a writing instrument according to the seventh embodiment.
  • a buoyancy body 70 separate from the slide stopper 11 is inserted into the ink storage chamber 2.
  • the buoyant body 70 is made of, for example, a hollow material or a material having a small specific gravity, has buoyancy with respect to the ink 10, and is attached to the slide plug 11 by the buoyancy. It is designed to give buoyancy.
  • the slide plug 11 since the slide plug 11 is provided with a floating property by the buoyant body 70, the slide plug 11 itself has a hollow structure or a foam having a small specific gravity. It does not need to be formed by a body or the like, and there is no restriction on the structure of the slide stopper 11.
  • the above-described ink adjusting mechanism 12 is not necessarily limited to the above-described structure, and may be omitted.
  • FIG. 22 shows a writing implement of an eighth embodiment provided with another ink adjusting mechanism 80.
  • a pen holder 81 is provided to move in the axial direction with respect to the main body 1, and the tip of the pen holder 81 is, for example, a felt chip 8. 2 is installed.
  • the rear end of the pen holder 81 is It is fitted to a diaphragm member 83 made of an elastic material such as synthetic rubber, and a notch 84 is formed in the center of the diaphragm member 83.
  • the notch 84 of the diaphragm member 83 is hermetically sealed by elastic force, and the ink storage chamber 2 and the felt chip 82 are connected to each other. Communication is blocked. Therefore, the head pressure of the ink 10 in the ink storage chamber 2 does not act on the phenolic chip 82, and the felt chip 82 becomes the ink slit chip. Is prevented from becoming a state.
  • the pen body holder 81 retreats due to the pen pressure, causing the diaphragm member 83 to elastically deform, and the notch 84 opens, and the ink 1 Zero is supplied to the felt chip 82 in the required amount.
  • FIG. 23 shows a writing instrument according to the ninth embodiment.
  • This is a device in which the ink adjusting mechanism as described above is omitted, and the ink storage chamber 2 and the pen body, for example, a ball chip 4 are directly connected via the relay core 85. It is. In this case, by appropriately setting the density and the like of the relay core 85, the amount of the ink to be supplied to the ball chip 5 is adjusted.
  • FIG. 24 shows a writing instrument according to a tenth embodiment of the present invention. This is provided with a slide stopper 11 similar to the slide stopper of the first embodiment described above.
  • the outer peripheral surface of the slide plug 11, for example, the outer peripheral surfaces of the first plug body 21 and the second plug body 22, are respectively arranged in the circumferential direction. A number of guide projections 101 protrude.
  • the above-mentioned guide projection 101 has a minute projection height, and is lightly in contact with the inner peripheral surface of the writing instrument body 1 to stabilize the slide stopper 11.
  • the gap G between the outer peripheral surface of the slide plug 11 and the inner peripheral surface of the main body 1 is maintained to be uniform and stable in the circumferential direction and the axial direction. .
  • the fact that the slide stopper is substantially non-contact means that a part of the slide stopper 11 comes into contact with the inner peripheral surface of the writing instrument body 1 with a light contact pressure as described above. Includes the status of the operation.
  • FIGS. 25 to 28 show a writing implement according to the eleventh embodiment of the present invention.
  • the partition groove in the slide plug of the first embodiment is omitted.
  • the slide stopper moves to the pen body side due to the water equal pressure corresponding to the diameter of the ink storage chamber when the writing instrument is placed in a substantially horizontal position. This is to prevent the accident.
  • the ink or non-volatile material retained in the gap between the outer surface of the slide plug and the inner surface of the ink storage chamber Capillaries such as sex oil Due to the sealing effect of the pipe force, even if the writing instrument is substantially horizontal, the sliding stopper can be prevented from moving to the pen body side when the writing instrument is substantially horizontal.
  • the eleventh embodiment is one in such a case, and is provided with a single member slide plug 11 1 in which a partition groove is not formed on the outer peripheral surface.
  • the configuration of this embodiment is the same as that of the first embodiment except that the configuration of the above-mentioned slide plug 11 1 is different.
  • portions corresponding to those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
  • the above-mentioned slide plug 111 is constituted by a single bottomed tubular cup-shaped slide plug main body 112.
  • the surface is formed as a cylindrical surface.
  • the slide stopper main body 112 is movably accommodated in the ink storage chamber 2 in a substantially non-contact state with the bottom of the slide stopper main body 112 facing the pen body 5. You.
  • a gap G is formed between the outer peripheral surface of the slide plug main body 11 and the inner peripheral surface of the ink storage chamber 2 as in the first embodiment.
  • the apparent specific gravity of the slide stopper 111 is smaller than the specific gravity of the ink, and the slide stopper 111 has a floating property with respect to the ink. Te, ru. Further, in this embodiment, the specific gravity of the slide stopper 111 is extremely close to the specific gravity of the ink, and thus has a slight floating property.
  • a conical taper portion 113 is formed on the inner peripheral edge of the open end of the slide stopper body 111 on the side of the tail plug 6. The edge of the open end is sharply formed.
  • ink is interposed in the above-mentioned gap G in the form of a liquid film in the same manner as described above. 1 lubricates itself with virtually no resistance and acts as a seal for this gap G.
  • a small amount of non-volatile oil for example, silicone oil 115 is sealed in the air side chamber 3 of the writing instrument body 1.
  • the silicone oil 115 is held in a liquid film on the inner surface of the air side chamber 3 and the cup-shaped slide stopper body 112 as described above.
  • the end of the gap G formed at the edge of the open end of the slide stopper main body 1 1 2 is sealed to prevent evaporation of the ink in the gap G 1.
  • a spherical weight 114 is accommodated in the ink storage chamber 2.
  • the weight 1 14 is moved in the ink storage chamber 2 by shaking the writing instrument prior to writing, thereby acting to agitate the ink and to be described later. It works to prevent the scattering of ink.
  • the gap G between the outer peripheral surface of the above-described slide plug main body 11 and the inner peripheral surface of the ink storage chamber 2 has an ink as described above. Are interposed in a liquid film by capillary force. Then, this slide # 111 moves substantially without resistance, and the consumption of ink, expansion and contraction are compensated for as described above.
  • the ink in the gap G forms a free surface at the open end of the slide plug main body 1 12.
  • the tapered portion 113 is formed at the open end of the slide stopper main body 112, and the edge of the open end is formed sharp.
  • the free surface of the ink is formed at the tip of the ink and is stably held at this position.
  • the free surface of the liquid held in the gap by the capillary force is formed at the position of the bent portion, the step, or the like of the wall surface forming the gap, and is stably held at that position. Tend to be done. And, as the angle of the bent portion or the step portion becomes closer to the acute angle, the holding force of the free surface becomes larger.
  • the edge of the open end of the slide stopper main body 112 is formed with the taper part 113 as described above and sharpened. Together, the angle is acute. Therefore, as shown in FIG. 27, the free surface of the ink in the gap G is formed at the position of this edge, and is strongly held at the position of the parentheses. Therefore, even when the writing instrument is set in a substantially horizontal position, the head pressure corresponding to the diameter of the ink storage chamber 2 depends on the sealing force due to the holding force of the free surface. The ink is prevented from flowing out from the lower side of the gap G, and the slide stopper 111 is moved to the pen body side.
  • the edge is formed at an acute angle in order to increase the holding force of the free surface of the ink in the gap G.
  • the edge is at a right angle or at an obtuse angle, There is an action of retaining the free surface of the ink in the gap G. Therefore, depending on the type of the ink, that is, its surface tension, wettability, and other conditions, even if the above-mentioned edge is a right angle or an obtuse angle, the same effect as above can be achieved. Yes Noh.
  • the silicone oil 115 filled in the air side chamber 3 covers the free surface of the ink in the gap G and lays down. Evaporation is effectively prevented. In this case, since the free surface has a strong holding action as described above, it is possible to reliably prevent the ink from being mixed with the silicone oil.
  • FIG. 29 shows a writing instrument according to a 12th embodiment of the present invention.
  • the outer shape near the open end of the slide stopper body 112 was reduced to increase the width of the gap, and this part was formed as an oil reservoir part 116. It is a thing.
  • silicone oil 115 since a relatively large amount of silicone oil 115 accumulates in the oil reservoir 114, the free surface of the ink in the gap G is largely covered. However, drying of the ink can be prevented more effectively.
  • This embodiment has the same configuration as that of the above-described first embodiment except for the above-mentioned points.
  • FIG. 29 the portions corresponding to those of the first embodiment are denoted by the same reference numerals. The description is omitted.
  • FIG. 30 shows a thirteenth embodiment of the present invention. This is done by plugging the plug member 120 into the open end of the slide plug body 1 1 2 of the cup-shaped slide plug 1 1 1 as described above and closing it. In addition, a narrow groove portion or a rough surface portion 121 is formed on the outer peripheral surface of the plug member 120.
  • a silicone oil 1 15 is stored and held in a cup-shaped slide 1 12 closed by the plug member 120.
  • This silicone oil 115 flows little and little from the narrow groove or rough surface 121 on the outer peripheral surface of the plug member 120, and then flows into the outer peripheral surface of the slide plug 111. Covers the free surface of the ink at the end of the gap G between the inner peripheral surface of the main body 1 and prevents evaporation of the ink.
  • silicone oil 115 remains on the inner peripheral surface of the air side chamber 3 of the main body 1. As the silicone oil is consumed, the free surface of the ink in the gap G is exposed and the ink may dry.
  • FIG. 31 shows a writing instrument according to a fourteenth embodiment of the present invention.
  • a plurality of ribs 122 are protruded from the inner surface of the cup-shaped slide stopper body 112, and the surface and corners of these ribs 122 are sealed.
  • the freezing surface of the ink in the gap G is always covered by replenishing the silicone oil in a small amount while the silicone oil 115 is adhered and held.
  • the operation is the same as that of the third embodiment.
  • first and third embodiments have the same configuration as that of the above-described first embodiment except for the points described above.
  • the same reference numerals in 31 denote the same parts as in the first embodiment, and a description thereof will be omitted.
  • FIG. 32 shows a writing instrument according to a fifteenth embodiment of the present invention.
  • the slide plug 11 of this embodiment includes a slide plug main body 13 2 similar to that of the above-described first embodiment.
  • the tip of the slide plug main body 132 is formed in a convex portion, for example, a conical portion 133.
  • a shaft portion 134 projects from the center of the slide plug main body 132 toward the tail plug side.
  • the shaft part 13 4 adjusts the weight of the slide plug main body 13 2 to set its buoyancy as appropriate, and when the assembling of the writing implement is performed,
  • the tip of the shaft 13 4 is gripped by a chuck of a dynamic assembler or the like, and also acts as a grip for gripping the slide 1 11.
  • the configuration of the fifteenth embodiment is the same as that of the above-described first embodiment except for the above points, and the parts corresponding to those of the first embodiment in FIG. Are given the same reference numerals and their description is omitted.
  • the writing instrument body when assembling such a writing instrument, the writing instrument body should be held substantially vertically, and the inner surface of the writing instrument should not be wet with ink. After that, the ink is injected, and then the slide stopper is inserted into the upper end of the main body, dropped by gravity, and floated on the surface of the ink.
  • the air between the surface of the ink and the inserted slide stopper is formed by the gap between the outer peripheral surface of the slide stopper and the inner peripheral surface of the main body. Escaped. If the pen body side of the slide stopper, that is, the lower end surface, is flat, part of the air cannot escape and air bubbles form at the tip end of the slide stopper. This remains There is power S.
  • the tip of the slide stopper body 132 is formed in a convex shape, air remains as air bubbles as described above. It can be prevented reliably.
  • FIG. 33 and FIG. 35 the assembling process of the writing instrument when the slide stopper as described above is used will be described.
  • the writing instrument main body 1 is held substantially vertically with its body side down, so that the inner peripheral surface of the main body 1 is not wetted. Then, a predetermined amount of ink 10 is injected. Then, insert the above-mentioned slide plug 1 11 from the upper end of the main body 1. The slide stopper 1 1 1 1 drops by gravity, and the air between the ink 10 and the slide stopper 1 1 1 is removed from the outer peripheral surface of the slide stopper 1 1 1. From the gap G between the inner peripheral surface of the main body 1 and the inner peripheral surface of the main body 1.
  • the slide stopper 1 1 1 The apex angle of the conical portion 133 is set to about 120 °, and if it is less than this angle, the above-described air escaping action is reliable. However, the apex angle of this conical portion may be 120 ° or more. Also, the shape of the tip of the slide stopper is not limited to a conical shape, but may be any of the above-mentioned shapes if the shape is a truncated cone, a spherical shape, or any other convex shape. Achieve the effect.
  • FIGS. 36 and 37 show the assembling process of the writing instrument in such a case.
  • a predetermined amount of silicone oil 115 is poured onto the liquid surface of ink 10. Then, in the same manner as above, insert the slide plug 1 11 from the upper end of the main body 1 and drop it by gravity.
  • the slide stopper 111 When the slide stopper 111 reaches the liquid level of the S-silicone oil 1 15, the air is released as described above. Then, when the slide stopper 111 is further lowered, the silicone oil 115 above the ink 110 is removed to the surroundings, as shown in FIG. 37. Then, the silicone oil 115 is interposed in the gap G.
  • the sliding plug 1 11 of the writing instrument manufactured in this manner has higher sealing properties because the silicone oil 1 15 is interposed in the gap G ⁇ . It also more effectively prevents the drying of the ink.
  • this slide stopper 1 1 1 is convex as described above.
  • air is reliably released, and only the silicone oil 115 on the ink 110 is removed to the surroundings to remove the gap. Since it escapes into G, ink and silicone oil do not mix. It should be noted that such a manufacturing method can also be carried out using a slide stopper whose tip is not convex as described above.
  • FIG. 38 shows a slide stopper of a writing instrument according to a sixteenth embodiment of the present invention.
  • the slide plug 14 1 of the present embodiment has a first slide plug main body 13 2 similar to the slide plug main body of the above-described fifteenth embodiment, and a tail plug side.
  • the second slide inserted into the main body is composed of the body and the main body.
  • the above-mentioned second slide stopper main body 14 2 is formed in a cup shape, and the bottom of the second slide stopper main body 14 2 has a shaft portion 13 4 of the first slide stopper main body 13 2.
  • the distal ends abut, and a space, that is, a partition groove 124 is formed between them.
  • an ink is interposed in the gap G between the first slide stopper body 13 and the gap G between the second slide and the body 14 2 is silicone. Oil 115 intervenes to prevent drying of the ink.
  • This embodiment operates in the same manner as the first embodiment described above, except that the first slide stopper main body 132 and the second slide stopper main body 142 are separately provided. Because of this member, the space between the partitioning grooves 124 between them can change with the expansion and contraction of air and ink, so that it can move more freely and smoothly. Can be done. In addition, this is because the shaft 13 4 of the first slide plug body 13 2 acts as a horn, and the minimum distance between the partition groove 1 24 is Is secured.
  • FIG. 39 shows a slide stopper of a writing instrument according to a seventeenth embodiment of the present invention.
  • the slide stopper 15 1 includes a cup-shaped first slide stopper main body 15 2 and a second slide stopper main body 15 3.
  • the second slide plug body 15 3 has a power shaft section 15 4 protruding therefrom, and the tip thereof is brought into contact with the inner surface of the first slide plug body 15 2.
  • FIG. 40 shows a slide stopper of the writing instrument according to the eighteenth embodiment of the present invention.
  • the slide plug 161 of this embodiment has a first slide plug main body 162 having the same configuration as the first slide plug main body of the 17th embodiment.
  • the second slide plug main body 163 is disposed apart from each other, and the space between them is configured as a partition groove 124.
  • this embodiment since there is no shaft that acts as a stop member, it is impossible to mechanically control the minimum distance between the partitioning grooves 124 between them, but this is not possible. Since a predetermined amount of air is sealed in the partition groove 124, a minimum interval between the partition grooves 124 is ensured. In addition, this embodiment is easy to manufacture because of its simple structure.
  • This embodiment has the same configuration as that of the seventeenth embodiment except for the above points.
  • the same reference numerals are given to portions corresponding to the embodiment, and the description is omitted.
  • the present invention is not limited to the above embodiment.
  • the structure of the slide stopper is not necessarily limited to the above embodiment, and various structures can be adopted.
  • the ink adjustment mechanism and the like are not limited to the above embodiment, and any other ink adjustment mechanism can be adopted.
  • any kind of ink and ink can be adopted.
  • the writing implement of the present invention has substantially no contact between the slide stopper and the inner surface of the ink storage chamber, and has substantially zero resistance when the slide stopper moves. It is possible to prevent various problems such as dropping of ink, inhalation of air, and instability of handwriting density due to the resistance of the slide stopper. .
  • the slide stopper since the slide stopper has a floating property, even if the slide stopper is in a non-contact state and the resistance is substantially zero, the slide stopper can be closed. Unwanted movements such as settling can be reliably prevented.
  • the slide stopper descends by its own weight and stops automatically at the liquid level of the ink, the air side above the slide stopper is controlled. The ink does not spill out into the air, and a step of removing the spilled ink is not required.
  • the slide stopper automatically stops at the liquid level of the ink, there is no particular problem even if the amount of ink to be charged varies. Therefore, the production becomes easy. Therefore, this writing instrument can be manufactured efficiently and reliably.

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Abstract

Cette invention se rapporte à un instrument d'écriture comprenant un obturateur coulissant se déplaçant librement, logé dans le réservoir d'encre, un film liquide étant formé dans un espace libre (G) situé entre l'obturateur coulissant (11) et la surface périphérique interne du réservoir d'encre (2), afin de les maintenir virtuellement dans une position sans contact. Seule une traînée visqueuse de ce film liquide agit comme résistance au mouvement sur l'obturateur coulissant (11), cette résistance étant virtuellement réduite à zéro, et l'obturateur liquide (11) possède une densité relative inférieure à celle de l'encre (10), pour lui permettre de flotter, empêchant ainsi l'obturateur coulissant (11) en position droite de couler dans l'encre, ce qui n'est pas souhaitable.
PCT/JP1999/002298 1998-04-28 1999-04-28 Instrument d'ecriture et procede de fabrication correspondant WO1999055539A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU36270/99A AU3627099A (en) 1998-04-28 1999-04-28 Writing instrument and method of manufacturing thereof

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP10/119273 1998-04-28
JP11927398 1998-04-28

Publications (1)

Publication Number Publication Date
WO1999055539A1 true WO1999055539A1 (fr) 1999-11-04

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Application Number Title Priority Date Filing Date
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JP (1) JP2000158877A (fr)
AU (1) AU3627099A (fr)
WO (1) WO1999055539A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS341373B1 (fr) * 1956-05-22 1959-03-13
JPS381768B1 (fr) * 1960-08-26 1963-03-06
JPH0852981A (ja) * 1994-08-12 1996-02-27 Tokyo Sainpen:Kk 水性ゲルインキを用いた筆記具
JPH08108684A (ja) * 1994-10-13 1996-04-30 Mitsubishi Pencil Co Ltd バルブ装置付き液体筆記具
JPH08118874A (ja) * 1994-10-27 1996-05-14 Pentel Kk 筆記具
JPH09315082A (ja) * 1996-06-03 1997-12-09 Mitsubishi Pencil Co Ltd ボールペン
JPH10236065A (ja) * 1997-02-26 1998-09-08 Mitsubishi Pencil Co Ltd ボールペン

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS341373B1 (fr) * 1956-05-22 1959-03-13
JPS381768B1 (fr) * 1960-08-26 1963-03-06
JPH0852981A (ja) * 1994-08-12 1996-02-27 Tokyo Sainpen:Kk 水性ゲルインキを用いた筆記具
JPH08108684A (ja) * 1994-10-13 1996-04-30 Mitsubishi Pencil Co Ltd バルブ装置付き液体筆記具
JPH08118874A (ja) * 1994-10-27 1996-05-14 Pentel Kk 筆記具
JPH09315082A (ja) * 1996-06-03 1997-12-09 Mitsubishi Pencil Co Ltd ボールペン
JPH10236065A (ja) * 1997-02-26 1998-09-08 Mitsubishi Pencil Co Ltd ボールペン

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AU3627099A (en) 1999-11-16

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