WO1998006585A1 - Ink reservoir member and ink jet recording apparatus and writing instrument using the same - Google Patents

Abstract

An ink reservoir member is equipped with all the constituents necessary for the ink reservoir and moreover, mitigates the limit of the thickness of a blade portion, increases an ink reserving quantity and improves functionality. Further, this member is not particular in selecting the materials of sheet-like members and can use all the water base inks and the oil base inks by using an axially stretched material of polyester films, for example. Therefore, the ink reservoir member can be produced easily and economically. An ink jet recording apparatus and a writing instrument use this ink reservoir member. The ink reservoir member (13) is constituted by laminating a plurality of flat-spread sheet members (15) and a plurality of protuberance portions (16) are formed on the surface of each sheet-like member (15) with suitable gaps between them by embossing or printing. Laminated sheet-like members are positioned substantially parallel to one another with preset intervals by the protuberance portions (16) in such a fashion as to define slits (18), and all the sheet-like members (15) are in contact with an ink conduit (19).

Description

 INK RESERVOIR, INK DIET RECORDING APPARATUS USING THE SAME, AND WRITING INSTRUMENT

Technical field

 According to the present invention, for example, in an ink jet printer, an ink reservoir (also referred to as an ink flow rate regulator, a collector, or a bellows) is provided between an ink tank and a printer head, and an air replacement hole is provided in the ink tank. In the printing section from the ink tank to the ink jet head, an ink reservoir that can be easily manufactured and exhibits good functions while increasing the ink capacity, and an ink jet recording using the ink reservoir. Related to the device.

 In addition, the present invention relates to a writing instrument, and particularly when the ink overflows from the ink tank due to a pressure change due to an environmental change between the ink tank and the outside and an ink conduction path for supplying ink in the ink tank to the pen tip. Ink tanks are provided with ink reservoirs for storing ink, and ink tanks are related to writing instruments with air replacement holes.Writing instruments include those that discharge, apply, draw or write liquids such as cosmetics Stuff. Background art

 Conventionally, an ink jet printer (also referred to as an ink jet printer) for ejecting and flying an ink droplet from a nozzle to deposit ink on a recording paper and record the ink is described in Japanese Patent Application Laid-Open No. 2-293153. An ink jet head has already been proposed. In the technology of this publication, an ink reservoir using an integral molding technology is used based on the description.

In general, a writing implement is configured so that the ink is always transferred from the ink tank to the pen tip in an appropriate amount, and an ink reservoir for storing overflowing ink. Storage unit). Ink reservoirs are used in many writing instruments that incorporate raw ink, such as fountain pens, small tube writing instruments, felt pens, water-based ballpoint pens, and makeup tools.

 Ink reservoirs are generally called collectors, bellows or flow regulators. In the following description, this ink reservoir is also called a collector. This collector is usually manufactured as an integral molded product by injection molding using a synthetic resin.

 FIGS. 1 and 2 show a configuration example of a writing instrument having such a collector. The writing implement a shown in FIGS. 1 and 2 includes an ink tank b1 for storing ink at an inner periphery thereof, a writing implement body b having one end opened in the axial direction, and a thin plate-like blade c1. Are integrally formed in a state where they are arranged in parallel and axially with a plurality of gaps (arranged in a comb shape in a side view) and inserted into the writing implement body b, and the comb grooves c between the blades cl are provided. 2.A pen having a collector c for temporarily storing the ink, a tip d fitted to the front outer peripheral surface of the collector c, and a pen tip e1 inserted into the tip d. It has a core e and a rear shaft f attached to the writing implement main body b so as to accommodate the rear part of the writing implement main body b, and the front axis d is press-fitted into the writing implement main body b. Is what is done. Further, the ink tank b l is provided with an air replacement port g for flowing air into the ink tank b l and flowing the overflowing ink to the collector c.

In ink jet printers or writing instruments, the collectors that can be used and manufactured with the current technology are comb-teeth in the longitudinal section of the collector c due to the structure of the integrated injection mold or the injection molding technology. The parallel gap width of the blade c 1 forming the ink storage part in a line (in this case, the gap between the teeth having a comb-shaped vertical section is shown; hereafter, the parallel gap width of the blade is referred to as slit. Each of them has a minimum width of 0.2, the maximum value of the depth of this blade c1 (from the periphery to the root of the comb-like vertical section) is 3 mra, and the thickness of this blade c1 The minimum width of 0.3 mm (the width of the comb teeth in the vertical cross section direction of the vertical cross section) is the maximum It is a collector with the ability.

 On the other hand, Japanese Unexamined Utility Model Publication No. 6-38711 discloses a collector, which is different from the above-mentioned integrally molded one and is composed of a combination of a plurality of members. The technique disclosed in Japanese Utility Model Publication No. 6-38711 discloses, as shown in the drawing, a single comb-shaped comb tooth of a vertical-section comb-shaped ink storage portion of the conventional collector. The flat member (1) has a convex part (3) and a concave part (4) in the center part, and the thickness of the central part, that is, the difference between the convex part and the concave part is larger than the thickness of the peripheral part. Have been. That is, the flat member has a difference in thickness in one sheet, and by utilizing the difference in thickness of the flat member, a plurality of convex portions are fitted into the concave portions and overlapped to form the ink holding member. It is characterized by forming a comb-like shape as a reservoir.

 It is clear from the drawings in the publication that the vertical cross-section has a cantilever structure in what is called structural mechanics. Further, although not shown in the drawing, a plurality of flat members are alternately fitted on the outer wall of the straight pipe body by alternately fitting a plurality of two kinds of disk-like bodies, thereby similarly forming a gap by overlapping a plurality of flat members. From the point that it can be secured, it can be said that it is disclosed as a superimposed comb-tooth-shaped collector characterized by the structure of the cantilever.

 The mechanism of action, that is, the function of the collector is as follows.

① The main purpose is to prevent ink from dripping from the ink jet head or pen tip due to the pressure difference between the ink tank and the outside air. There is no problem if the ink in the tank is so clogged that there is no space, but the ink in the tank is replaced with outside air as the ink is consumed for printing or writing, creating a space in the tank. If the pressure inside the tank decreases due to the pressure difference between the inside and outside of the tank, or if the pressure inside the tank rises due to the expansion of gas due to the rise in temperature inside the tank, the tank will stay in the tank until the pressure inside the tank matches the outside pressure. An overflow of ink occurs. This overflow ink is stored in a collector to prevent ink from dripping from the head or pen tip. ② When the pressure inside the ink tank drops below the outside air pressure, the outside air flows into the tank until the pressure inside and outside the ink tank is equal, as opposed to ①. However, when ink is stored in the collector, However, the stored ink is always returned to the tank first, and then, when the pressure in the tank is still low, the air is introduced into the tank only through the air displacement hole.

 ③ When ink is consumed when ink is present in the collector, the ink in the collector is consumed (reduced) before the ink in the tank, and then the ink in the tank is used. Is what is being done.

 As described above, as a collector manufacturing technique, in the current state of the art by integral injection molding of a synthetic resin, there is a limit to a minimum interval of a slit width as an ink storage part in mold manufacturing and molding. Therefore, in the case where the overflow ink is generated, there is a limit in providing a capillary force of the slit that can be stored only in the collector without falling down from the ink head or the pen tip. . Furthermore, there is a limit to reducing the thickness of the wings, and it is not always possible to increase the number of wings in one collector and make the wings longer without a jar. Therefore, the ink storage amount of the collector is limited, and the ink storage volume that can be practically used with the above-mentioned state-of-the-art collector is about 0.4 ml (milliliter).

 As described in (1) above, if it is desired to increase the capacity of the ink tank, the storage capacity of the collector must necessarily be increased. If the ink storage volume is limited, the internal volume of the ink tank will also be limited. In particular, in the case of a collector used for writing instruments for thin drawing lines such as a fountain pen, there is a sufficient writing distance even if the amount of ink in the ink tank is small, and the collector of the current technology has a sufficient storage function. , Has been put to practical use.

However, due to recent advances in the demand for diversification of writing instruments, such as the use of underlining markers, writing instruments such as underlining markers and cosmetics have a large amount of ink (or coating liquid) to be drawn. Disadvantage of needing to refill ink There is a problem that the range of practical application is limited.

 Further, the technology disclosed in Japanese Utility Model Publication No. 6-38711 has several problems. According to the gist, a slit is cut from the outer edge toward the center of the disk-shaped portion of the disk-shaped flat member, and the disk-shaped portion has a C-shaped ring-open state. Therefore, the disc-shaped portion is separated in the circumferential direction, and is apparently less rigid than the disc-shaped one and easily deformed against radial force from a structural mechanical point of view. In order to secure this rigidity, the thickness cannot be reduced, and even if it is desired to reduce the thickness, the thickness is limited and the range of practical use is limited.

 Further, since it is necessary to align the slits cut in the disc-shaped portion, as shown in FIG. 1 and FIG. 2 of the above-mentioned publication, the convex portion (3) and the concave portion (4) They are fitted in a circular shape with some parts missing, and the slit width as a blade is formed by the difference in thickness between the convex and concave portions. Here, in the case of creating a combined collector using a synthetic resin, when forming a slit width to store the ink as a flat member, it is necessary to increase the area of the blade part and reduce the thickness of the blade. It is extremely difficult to make thinner while keeping the flatness while preventing deformation of the blades, and the selection of resin materials and the number of injection molding cycles and the number of cuts are large, which is a technical difficulty and an obstacle to cost reduction. . Therefore, it is not only expensive, but also has a problem that it is difficult to make the ink storage capacity sufficient.

Further, when the thickness of the blade is reduced or the depth is increased beyond the critical dimension in the conventional collector structure having the above-described comb-shaped vertical cross section, the ink discharge port or the pen is in a state where the ink flows into the collector. If there is a head (head) between the tip and the collector, the part of the wing containing the ink temporarily maintains a parallel, equally spaced slit, but the surface tension of the ink acts. As time passes, a plurality of blades gather together to form a block, and a phenomenon of equilibrium occurs. Therefore, the slit interval is narrowed in this block, while the adjacent blocks are the sum of several slit widths narrowed in the block in addition to the interval of one slit width. Minute Only open.

 The open part loses the ink holding power, which is the function of the collector, and if all the blades are blocked, the amount of stored ink in the collector is reduced by the loss of the ink holding power, and the ink discharge port or pen tip Ink drops more as spots or direct current. In addition, if the writing instrument is capped, the ink will accumulate in the cap and will have a serious disadvantage that it will spill when the cap is removed. In addition, considering the volume of the collector part, the volume that can be stored is reduced by the total volume of the wide open part, and the harm caused by the sufficient design of the collector will cause the function to deteriorate and cause problems. It has big challenges.

 SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art by relaxing the limit of the thickness of the blade, increasing the ink storage capacity in the collector, and improving the functionality. Furthermore, if the sheet is made of any material, for example, if a biaxially stretched polyester film is used, it can be used for all oil-based and water-based inks, and can be easily and inexpensively manufactured. An object of the present invention is to provide a reservoir, an ink jet recording apparatus and a writing instrument using the same. Disclosure of the invention

The present invention has the following configuration to achieve the above object.

The invention according to claim 1 is an ink reservoir for temporarily storing overflowing ink from an ink tank, wherein the ink reservoir is formed by stacking sheet-like sheets that spread in a flat plate shape. The single-sheet body has a plurality of convex portions formed at appropriate positions on the surface thereof, and the convex portions position the stacked adjacent single-sheet members substantially in parallel at a desired interval. An ink reservoir characterized by forming a gap for storing overflowing ink, and wherein all the sheets constituting the gap are in contact with the ink conduction path. The invention according to claim 2 is the ink retaining body according to claim 1, wherein the convex portion is formed by a printing method.

The invention according to claim 3 is the ink reservoir according to claim 1 or 2, wherein the sheet body is made of a plastic film.

The invention according to claim 4 is the ink storage device according to claim 1 or 2, wherein the sheet body is made of a metal plate.

The invention according to claim 5 is characterized in that the ink conducting path is made of felt non-woven fabric or a fiber convergence body made of long fibers or short fibers, a cotton-like material, a communicating porous body, a communicating porous foam, or the like. Item 14. The ink reservoir according to any one of Items 1, 2, 3, and 4.

The invention according to claim 6 is characterized in that the ink conducting path holds and guides the ink by a capillary force formed by a plastic molded body by extrusion or injection. Or an ink reservoir according to item 1.

The invention according to claim 7 is an ink jet recording apparatus having a reservoir for temporarily storing overflowing ink from an ink tank in an ink jet head, wherein the ink reservoir is a sheet-like sheet spreading in a flat plate shape. The sheet has a plurality of protrusions formed at appropriate positions on the surface of the sheet, and the protrusions are stacked and adjacent to each other. The gaps for storing the overflow ink are formed by positioning the bodies substantially parallel to each other at a desired interval, and all the sheets forming the gaps are in contact with the ink passages. It is an ink jet recording device.

The invention according to claim 8 is an ink jet recording apparatus according to claim 7, wherein the ink storage body according to any one of claims 2 to 6 is used for the ink storage body. .

The invention according to claim 9 is the ink jet recording apparatus according to claim 7, wherein the ink reservoir and the ink jet head are integrated.

A tenth aspect of the present invention provides a cartridge in which an ink reservoir and an ink tank are integrated. The ink recorder according to claim 7, wherein the ink tank is detachably attached to the ink reservoir. 8. An ink jet recording apparatus according to claim 7, wherein: The invention according to claim 12 is the ink reservoir, wherein a plurality of sheets are stacked and stored in the container, and the distance between the inner surface of the container and the sheet is a slip between the sheets. 8. The ink jet recording apparatus according to claim 7, wherein the ink jet recording apparatus is wider than the ink interval.

The invention according to claim 13 is the ink jet recording apparatus according to claim 7, characterized in that the sheet bodies are overlapped in the horizontal direction with the plane direction being vertical.

The invention according to claim 14 is a writing instrument in which an ink conduction path and an ink reservoir for retaining an overflow ink are provided between the ink tank and the drawing portion, and the ink tank is provided with an air replacement hole. The ink reservoir is formed by stacking sheet-like sheets that spread in a flat plate shape, and the sheet-like bodies have a plurality of convex portions formed at appropriate positions on the surface thereof. The protrusions form the gap for storing the overflowing ink by arranging the stacked adjacent sheets at a desired interval substantially in parallel, and all the sheets forming the gap are formed. The writing instrument according to claim 15 is characterized by being in contact with the ink conduction path. The invention according to claim 15 is the writing instrument according to claim 14, wherein the projection is formed by a printing method.

The invention according to claim 16 is the writing instrument according to claim 14 or 15, wherein the sheet body is made of a plastic film.

The invention according to claim 17 is the writing instrument according to claim 14 or 15, wherein the sheet body is made of a metal plate.

The invention according to claim 18 is characterized in that the ink conducting path is made of a felt nonwoven fabric or a fiber convergence body made of long fibers or short fibers, a cotton-like material, a communicating porous body, a communicating porous foam, or the like. The writing implement according to any one of claims 14, 15, 16, and 17. According to the invention of claim 19, the ink conducting path is formed by extending the back side of the pen tip made using a fiber converging body made of long fibers or short fibers to the ink tank, and the pen tip and the ink conducting path are integrated. The writing implement according to any one of claims 14, 15, 16, and 17, wherein the writing implement is formed as follows.

The invention according to claim 20 is characterized in that the ink conducting path is formed of a relay core made using a sintered core of plastic. A writing instrument according to claim 1.

The invention of claim 21 is that the ink passage is formed by using a sintered core of plastic and the back side of the pen tip is extended to the ink tank, and the pen tip and the ink passage are formed integrally. The writing implement according to any one of claims 14, 15, 16, and 17.

 Hereinafter, the principle of the present invention will be described.

 In an ink reservoir (collector) used for an ink jet recording device or writing instrument, etc., when the overflow ink is held in the collector and is in an equilibrium state, the ink tank to the printer or ink jet head or pen This indicates that the ink (including the ink passage and the collector) has succumbed (this will be referred to as the ink column in the future).

 From the position of the printer head or pen tip to the desired position [For example, the position where the surface of the opposing blades that constitute the slit width in the collector exerts capillary force to pull the ink (hereafter the upper end) Considering the printer head or pen tip, and the vertical height of the ink column including the ink path, the force corresponding to the hydrodynamic head in hydrodynamics works downward. Will be.

That is, at the top, the head is zero, and at the printer head or pen tip, it is the vertical height of the liquid column. On the other hand, the capillary force at the upper end acts in the direction from the ink conduction path side of the blade to the outer peripheral end, and acts as a force for holding the overflow ink in the collector. In the liquid column from the top edge to the printer head or pen tip Looking at the pressure distribution, the value obtained by subtracting from the capillary force the liquid column from the upper end, that is, the head, at any point in the liquid 拄 is applied as a negative pressure to the external pressure at that position. .

At the upper end, the capillary force itself is a negative pressure, and acts in the direction of reducing the spacing between the blades of the individual slits in the collector. Strictly speaking, keeping the blade surface horizontal and keeping the head constant in one slit of the collector is equivalent to applying an evenly distributed load to the entire blade surface constituting the slit width. comprising _c structure of the collector one described in the prior art the actual fair 6-3 8 7 1 1 JP, also one by one vane including the eaves overhang made of cantilever structure as referred to Tokoroido wooden building Is the extension of the structure fixed on one side. Here, if the thickness of the blade is reduced, the distance from the fixed end having a comb-shaped cross section is increased beyond the limit, or both are performed, the cantilever has a cantilevered side in a flat plate structure in material mechanics. In the same way that when a load is applied to a flat plate surface and the load exceeds a certain stress, a radius is created, the capillary tube acts as a negative pressure on the portion where the ink is contained, and the surface of the blade This indicates that a uniform distribution load is applied to the area where the fins are located, and that the slit width changes in the direction of the radius corresponding to the thickness and cantilever length of the blade, and the slit width decreases. ing. The block is formed in the world of force tastrophy, in which the number of gatherings is determined by the direction to which the adjacent blades begin to bend, but when the equilibrium is settled, the state becomes as described above.

 The present invention relates to a conventional beam collector structure having a structure made of a cantilevered beam structure, which is a so-called civil engineering structure. The proposed collector structure solves such concerns and can be manufactured easily and inexpensively.

The continuous beam structure according to the present invention has a structure similar to that of the structure in which the base is arranged at a sufficient interval so that the floor does not bend on the floor of the building, as seen from the relationship between the base and the floor. The thickness of the blades was reduced and / or the area of the leaf was increased. In this case, the fulcrum that regulates the interval of the slit width is composed of convex portions so that the blade does not deform due to the capillary force and bending stress caused by the head, and is filled within the range where the blade does not bend. The object has been achieved and the present invention has been accomplished by arranging the necessary or sufficient number of blades on the surface of the fulcrum at an appropriate distance between the fulcrums.

 (1) According to the present invention, a collector in which sheet bodies having a convex portion formed by embossing or the like are overlapped can increase the area of the sheet body, and a collector for storing overflowing ink can be obtained. Since the volume can be increased, the ink tank can be enlarged and the amount of ink used can be increased.

 ② In the slit for storing the ink, the slit width can be kept constant by supporting the capillary force to narrow the slit width by embossing, etc. at appropriate intervals, so that the slit width can be kept stable. It can function as a collector.

 (3) The thickness of the sheet can be reduced, and the efficiency of the collector volume as the volume of the ink storage space can be increased.

 と し て As a sheet, a variety of inks such as water-based and oil-based can be increased by applying the optimal processing for the wettability with the ink when it is flat.

 Based on the above principle, the inventor increases the ink storage capacity of the ink storage body or the ink storage body (also referred to as a collector) of an ink jet recording device and a writing instrument, and improves the functionality. The present invention has been made.

 If the part that forms the slit of the collector manufactured by integral molding is cut transversely, the blade part becomes one by one. According to the present invention, the same function as that of a conventional collector can be achieved by manufacturing, stacking, and stacking single-wafers having a shape and structure similar to the single-wafers. Not only that, the single-leaf body spreads in one plate shape and is connected seamlessly in contact with the ink conduction path. Unlike the conventional blade part that forms a slit, the blade body There is no limit to the thickness of the part, and the storage capacity of the collector can be easily increased.

In consideration of the slit width (spacing between blades), the present invention The convex portion (2) may be, for example, embossed or stepped on a single-wafer body, and a desired gap width can be easily manufactured by setting the convex portion.

 This not only allows a large degree of freedom in the design of the ink reservoir or the ink jet recording device or writing instrument, but also allows a quick response speed to external changes. Such problems can be eliminated, and the functionality as a flow control body can be improved.

 Furthermore, since the conventional collector is integrally molded in a state in which a plurality of blades are stacked, there is a limit in manufacturing due to the structure of the mold or the function of injection molding, the thickness of the blade portion and the gap width of the slit. was there.

 On the other hand, since the single-wafer body of the present invention only needs to be molded one by one, there is no limit on the thickness of the blade portion as described above, so that it is easy to reduce the thickness. One whole volume can be made smaller. At the same time, the thickness of the wings can be reduced, so the total length of the collector when stacking single-wafers

(The length in the overlapping direction) can be reduced. Therefore, the head from the ink discharge end (for example, the tip of the ink jet or the pen tip of the writing implement) to the slit can be reduced, so that the storage capacity is large, the volume efficiency is improved, and the dead space is improved. And the functionality as a flow regulator can be improved to further reduce costs.

 The structure of the stacked sheets is such that when the sheets are stacked one on top of the other, the space created by the upper and lower sheets is formed almost in parallel (forms slits) over the whole, and overflows from the tank. Providing wings to store the flowing ink, and making the space thicker than the wings, or a convex part for maintaining the space integrally with the wings (also referred to as an interval holding part) It is to have.

In addition, a conductive path formed of holes or cutouts communicating with each other is formed in the stacked sheet bodies, and the ink is supplied from the ink tank to the nozzle of the ink jet head or the pen tip of the writing implement through the conductive path. I do. In addition, for example, the convex portion can be formed so as to have a greater thickness at the substantially central portion and the outer peripheral portion in the plane direction of the sheet body than the blade portion.

 Further, the groove is formed in the sheet body continuously from the ink conduction path toward the surface of the sheet body, and the ink is formed between the ink conduction path and the slit in a state where the sheet bodies are stacked. Having an ink circulation groove for allowing the ink to flow therethrough. With this configuration, the ink flowing from the tank can flow in and out of the tank from the sheet body toward the ink conduction path by the ink circulation groove, so that the ink overflow to the slit is sequentially performed from inside to outside. The ink can be stored in the slit without waste.

 In the present invention, the shape of the sheet is not limited. For example, it is efficient for the storage capacity if the size of each sheet (spreading in the direction of the blade) gradually increases and decreases along the overlapping direction as the sheets are stacked. However, the size of the sheet body may be a step at an arbitrary position along the direction of the overlap.

 In addition, the planar shape of the sheet body can be various shapes such as a rectangle, a circle, and a polygon.

 Also, the facing surfaces of the sheets forming the slit for storing the ink need not be along the respective flat surfaces, but may be curved surfaces, and may be curved surfaces. However, it is only necessary that the shape be parallel or almost parallel when stacked.

 Furthermore, the material of the sheet material should be any material that does not dissolve in ink or paint to be used, does not cause swelling, deformation and deterioration, and does not dissolve anything that causes deterioration such as ink. Can also be used. Therefore, while conventional collectors could only use certain materials such as ABS resin to achieve the desired function, the present invention uses various resins (for example, polypropylene, POM, PVC, PET, etc.). It can be used, and material cost can be reduced.

In this case, in order to generate capillary force, the contact angle with the ink used should be In some cases, it must be less than 90 degrees.

 Further, in the present invention, even if there is a structure in which a slit for ink conduction that allows ink to flow between the single-leaf bodies is inserted into the single-leaf body, and the single-leaf body has the ink communication. You don't have to.

 In addition, a member that guides the ink in the ink tank is provided on the ink conduction path that allows the ink to flow into and out of the slit on the ink conduction path from the ink tank to the nozzle of the ink jet head or the pen tip of the writing implement. The holding force can be held by the capillary force for conduction. * A molded product to be led out can be fitted into the conduction path. In addition to such a molded product, a so-called so-called fiber core formed by bundling fibers or a material without an outer skin used for a relay core, batting, and the like can be used.

 As an example, when the structure of the present invention adopts a structure in which the outer peripheral shape of the single-leaf body and the inner peripheral surface shape of the conduction hole are formed concentrically when viewed in the vertical direction of the single-leaf body, It is not necessary to consider the direction of the circle, but the one made of fiber core can give appropriate elasticity, so it has good adhesion to the single-wafer, and there is a variation in function. Disappears, showing good results.

 In addition, the number, size and shape of the ink flow passages of the sheet are basically not limited, but a gap holding section for forming a slit of the sheet (thickness is provided at the center of the blade section). Or the insertion of a part of a separate spacer) so that the formation of the slit gap does not become unstable when sheets are stacked. It is necessary to set the number or size of the slits formed by the blades according to the volume (the product of the gap width and the area of the blades).

However, it is preferable that the ink flow path is not made to have a capillary force smaller than the capillary force of the gap width of the slit. This is because the ink stored between the slits may be cut off at the ink outlet path and remain without returning to the ink conduction path. The projections for forming the slits of the single-leaf body may be formed on both sides in such an arrangement that they can be overlapped without considering the orientation of the single-leaf body. The required structure can be formed only on the other side without forming anything.

 A structure in which an ink reservoir is placed in a container as an ink jet head or writing instrument.The ink reservoir is a cylinder in which multiple sheets are stacked and stored. In this case, the interval between the outer peripheral surface of the cylindrical body and the outer peripheral surface of the single-leaf body can be made wider than the slit interval between the single-leaf bodies. With this configuration, the capillary force in the gap between the inner peripheral surface of the cylinder and the outer periphery of the blade portion becomes weaker than the capillary force of the slit, and the ink retained in the slit is removed from the inner peripheral surface of the cylinder and the blade. It can be prevented from remaining between the outer periphery of the part. BRIEF DESCRIPTION OF THE FIGURES

 FIG. 1 is an explanatory view of a conventional writing instrument.

 FIG. 2 is an enlarged explanatory view of the writing instrument of FIG.

 FIG. 3 (a) is an explanatory diagram of an ink jet printer according to the first embodiment of the present invention, and is an explanatory diagram of an ink jet head.

 FIG. 3 (b) is an illustration of the support plate with the nozzle plate of the ink jet head removed.

 FIG. 4 is a sectional view taken along the line IV-IV in FIG.

 FIG. 5 is an explanatory view of a single-leaf body of the ink reservoir.

 FIG. 6 (a) is a plan view of the sheet body of the ink reservoir.

 FIG. 6 (b) is a longitudinal sectional view of the sheet body of the ink reservoir taken along the line AA of FIG. 6 (a).

 FIG. 6 (c) is a detailed sectional view of a portion B in FIG. 6 (b).

FIG. 7 is an explanatory view of an ink jet head according to a first modification of the ink jet printer according to the first embodiment. FIG. 8 (a) is an explanatory view of an ink jet head according to a second modification of the ink jet printer according to the first embodiment.

 FIG. 8 (b) is an explanatory view of an ink jet head according to a third modification of the ink jet printer according to the first embodiment.

 FIG. 9 is an overall sectional explanatory view of a writing instrument according to a second embodiment of the present invention.

 FIG. 10 (a) is a plan view illustrating a sheet body of a writing instrument according to the second embodiment.

 FIG. 10 (b) is a cross-sectional view taken along the line AA of FIG. 10 (a), for explaining the sheet body of the writing instrument according to the second embodiment.

 FIG. 10 (c) is an enlarged cross-sectional view of a portion B in FIG. 10 (b) for explaining the sheet body of the writing instrument according to the second embodiment.

FIG. 11 is an explanatory view of a state in which sheet bodies are stacked.

BEST MODE FOR CARRYING OUT THE INVENTION

 Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings.

 FIG. 3 to FIG. 6 are explanatory views of an ink jet head 1 in an ink jet printer (corresponding to an ink jet recording apparatus) according to the first embodiment of the present invention. Fig. 3 is an external view of Inkjet Head 1, Fig. 4 is a cross-sectional view taken along the line IV-IV in Fig. 3, and Fig. 5 is an explanatory view of a single-wafer. Is shown as about 100 times).

 As shown in Fig. 3 and Fig. 4, the ink jet head 1 mainly stores ink. You. The support 2 allows the ink jet head 1 to be attached to a corresponding portion of an ink jet printer main body (not shown) or the like to be mounted on the ink jet printer main body.

 In the ink jet head 1, a substrate 3 is mounted on the front side (indicated by the symbol F) of the support 2, and a nozzle plate 4 is further provided on the front side of the substrate 3 with an appropriate gap 5 therebetween. Are joined. A plurality of heating resistors 6 are arranged in, for example, a vertical direction on the substrate 3, and each heating resistor 6 is connected to a contact 8 by a wiring 7. In the nozzle plate 4, nozzles 9 are arranged and formed at positions facing the respective heating resistors 6.

 In addition, an ink flow path 10 communicating with a gap 5 provided between the substrate 3 and the nozzle plate 4 is formed on the upper surface of the support 2, and an ink tank fitting recess 11 is formed. It is roughly bowl-shaped. The ink tank 12 is provided with an ink reservoir (collector) 13 in a lower half thereof, and an upper space of the ink reservoir 13 is formed as an ink reservoir 14, and an ink reservoir 13 is provided. The lower end is water-tightly fitted to the ink tank fitting recess 11 on the upper surface of the support 2.

That is, as shown in FIG. 3, the ink jet head 1 of the embodiment is provided with an ink continuity between the ink reservoir 14 inside the resin ink tank 12 and the nozzle plate 4. A passage 19 and an ink reservoir 13 for retaining the overflow ink are provided, and an air port 22 is provided in the ink tank 12.

 The ink reservoir 13 is formed by stacking sheet-like bodies 15 that spread in a substantially flat plate shape. The sheet body 15 is formed by embossing or printing a plurality of desired convex portions (corresponding to convex portions) 16 having substantially the same convex height at positions where the surface of the flat plate portion 17 is appropriately spaced. The convex portion 16 is used to hold the overflow ink by arranging the flat plate portions 17 and 17 of the stacked adjacent sheet bodies 15 at substantially desired intervals. The sheet (gap portion) 18 is formed, and all the sheet bodies 15 constituting the gap portion 18 are in contact with the ink conduction path 19.

 FIGS. 5 and 6 show the single-leaf body 15. FIG. 6 (a) is a plan view, FIG. 6 (b) is a sectional view taken along the line A--A of FIG. 6 (a), and FIG. Part B enlarged views are shown.

As shown in FIGS. 5 and 6, the sheet body 15 is a generally flat plate having a circular shape in plan view, and has a convex portion 16 5 formed by embossing a male and female die by pressing. A central hole 15a through which the ink passage 19 passes is formed in the center. The convex portion 16 is arranged in three rows of inner, middle and outer along the peripheral edge of the central hole 15a and the outer peripheral edge of the single-wafer body 15a, respectively. As a specific example, the leaf 15 has a diameter D! = 2 Omm, a thickness t _t = 0.1 mm, and a central hole diameter D ₂ = 5 mm. In addition, the convex portion 16 has an outer diameter D ₃ = 1 mm and a height t ₂ 0.1 mm, and the inner row has a radius Ri = 3.5 mm (central axis 15 e) about the central axis 15 e. circularly six sequences with an equal division of 60 ° on the mm), the middle side column 1 in this division of 30 ° on a circle of radius R ₂ = 6 mm (diameter 1 2 mm) around the center axis 1 5 e Two rows are arranged, and 18 outer rows are arranged at equal intervals of 20 ° on a circle having a radius R ₃ = 9 mm (diameter 18 mm) with the center axis 15 e as the center.

In addition, the shape of the sheet body 15 is not limited to the above-mentioned disk shape, and can be formed in an appropriate shape such as a square. Further, in the embodiment, the convex portions (convex portions) 16 are arranged concentrically and equally, but the present invention is not limited to this. For example, the convex part of By arranging them randomly, it is possible to prevent projections from entering the recesses of the emboss. In the manufacture of a single-leaf body, a sheet or roll body having a wide material and embossed on the entire surface or a projection formed by a printing method or the like is punched into a single-leaf body shape to manufacture a single-leaf body .

 In addition, the sheet 15 can be formed from a plastic film or a metal plate.

 Further, the convex portion 16 of the sheet body 15 can be formed by a printing method other than the embossing. In this case, the ink may be raised to a desired height with a printing ink by means such as flexographic printing, or may be heated and heated after printing so that the printing ink portion foams and swells.

 Further, the desired interval between the stacked sheets 15 is obtained by the convex portion 16 of the sheet 15, and it is preferable that the sheets 15 are parallel to each other, but the performance of the ink holding body is exhibited. As far as possible, it is sufficient that the sheet bodies are almost parallel.

 The ink conduit 19 can be made of felt, non-woven fabric, or a relay core formed by bundling (fiber bundles) fibers of long fibers or short fibers. The relay core does not have a sheath used for pen cores such as a felt-tip pen, a relay core, batting, etc., which is called a fiber core formed by a fiber bundle, and has an appropriate elastic force. It is preferable to use one.

 In addition, the other ink conducting path 19 may be, for example, a resin-molded core having a slit formed on the outside in a rod shape, an inorganic or organic sintered body, or the like. One having a function can be used. Preferably, the ink conduction path 19 may be a relay core using a plastic sintered core.

In the above-mentioned ink jet printer, as shown in FIG. 3 and FIG. 4, an air port 22 is opened at the lower end side surface of the ink tank 12, and the air port 22 is connected to the ink storage body 13. Between the outer periphery of the sheet 15 and the inner wall of the ink tank 12 and through the air replacement port 24 with the inside of the ink reservoir 14 above the ink reservoir 13. I have.

 The lower end of the ink passage 19 of the ink reservoir 13 communicates with the ink passage 10 of the support 2, and the ink passage 19 is constituted by the relay core. In addition, the ink reservoir 14 above the ink reservoir 13 is filled with ink 26.

 The ink tanks 12 are made of a transparent material (eg, transparent plastic) so that the amount of ink can be visually recognized from the outside.

 The ink reservoir 1 3 is formed by stacking and storing a plurality of sheets 15 in the lower portion of a cylindrical ink tank 12 leading to the air replacement port 24. The gap between the single-leaf body 15 and the outer peripheral surface of the single-leaf body 15 is wider than the gap between the slits 18 between the single-leaf bodies 15. In this way, the capillary force in the gap between the inner peripheral surface of the ink tank 12 and the outer periphery of the sheet 15 becomes weaker than the capillary force of the slit 18, and the capillary force is stored in the slit 18. The ink can be prevented from remaining between the inner peripheral surface of the ink tank 12 and the outer periphery of the single-wafer 15.

 Reference numeral 20 denotes a rib body that presses the upper end portion of the stacked sheet bodies 15 to make the overlapping of the sheet bodies 15 at a constant interval, and the rib body 20 upper end face 21 is an ink storage section. Facing 14 The outer periphery of the rib body 20 is in close contact with the inner periphery of the ink tank 12, and the air replacement □ 24 is formed in an appropriate shape and position that partially generates a capillary force.

Here, the capillary force of the ink jet head 1 with respect to the ink 26 is set to have a relationship of nozzle 9> ink conduction path 19> air replacement port 24> slit 18. In addition, the capillary force of the slit 18 located in the ink reservoir 13 is larger than the head (water head) from that position to the nozzle 9. As a matter of course, the capillary force of the air replacement port 24 is larger than the head (water head) from that position to the nozzle 9 from the above inequality c. Also, the intervals of the slits 18 may be the same. When the nozzle 9 is positioned downward, the ink 26 coming out of the slit 18 and stored is ink 26 If the slits 18 are at equal intervals, the slit 18 nearer to the nozzle 9 stores more ink amount because of the influence of the weight of the ink (from the fact that the ink 26 becomes a water column). Therefore, as the position goes upward, the height of the convex portion 16 is reduced, that is, the slit 18 is narrowed (by increasing the capillary force), and the ink 26 is efficiently saved in each slit 18. You can also make it.

 Next, the operation of the embodiment will be described.

 In the ink jet 1 of the embodiment, the ink 26 is supplied to the ink flow path 10 from the ink storage section 14 while passing through the ink conduction path 19 in the center of the ink storage body 13. The fluid is further supplied from the flow path 10 to the gap 5 between the nozzle plate 4 and the substrate 3. When the print information signal is supplied, a thermal pulse is generated from the heating resistor 6. Then, the ink 26 in the gap 5 is ejected from the nozzle 9 at a position facing the heating resistor 6 due to a state change caused when the thermal pulse is applied, and adheres to the recording paper, thereby printing. Is executed.

 When printing is continued by ejecting the ink 26 from the nozzle 9 to the recording paper, the ink in the ink flow path 10 is reduced in force, and the reduced ink 26 is inked via the ink conduction path 19. It is replenished from the ink reservoir 14 of the tank 12. Then, the ink 26 in the ink reservoir 14 decreases, and the internal pressure of the ink reservoir 14 decreases. Outside air is introduced into the ink reservoir 13 from an air port 22, and the inside of the ink reservoir (collector) 13 is at atmospheric pressure.

 When printing continues and the difference between the internal pressure and the atmospheric pressure exceeds a certain value, that is, the capillary force of the air replacement port 24 (more strictly, the capillary force of the air replacement port 24 is reduced by the capillary force of the air replacement port 24). When the water head (head) from the position of the air displacement port 24 to the position of the nozzle 9 becomes stronger, the air in the ink reservoir 13 passes through the air displacement b 24 and the ink reservoir 1 Enter 4

If the ink jet head 1 changes externally, for example, if the air pressure drops, or if an ink jet printer is used, the temperature inside the ink tank 12 (ink storage section 14) will increase. When it rises, the same result as when the internal pressure of the ink reservoir 14 rises. Then, when the ink 26 flows into the ink conduction path 19 and exceeds the ink that can be stored inside the ink conduction path 19, the ink 26 overflowing to the ink reservoir 13 is discharged from the ink reservoir 13. It enters slot 18 and is stored by the capillary of slit 18.

 Also, if the ink jet printer is used in a state where the ink tank 26 is temporarily stored in the ink tank 13 as described above, the ink in the ink flow path 10 and the ink in the ink passage 19 is reduced. However, the reduced ink is firstly replenished with the ink stored in the slit 18 having a low capillary force, so that the ink in the slit 18 is consumed. Next, when the ink in the slit 18 runs out, the ink 26 in the ink reservoir 14 is consumed and the internal pressure in the ink reservoir 14 decreases, but the capillary force of the air replacement port 24 increases. When the internal pressure of the ink reservoir 14 decreases, air enters the reservoir 14, and the ink 26 in the ink reservoir 14 gradually decreases.

 According to the first embodiment, the ink retaining body 13 in which the single-leaf body 15 on which the convex portion 16 is formed by embossing is overlapped has a width of the single-leaf body 15 (a width of the flat plate portion 17). Can be increased, and the volume of the ink reservoir 13 for storing overflowing ink can be increased, so that the ink tank 12 can be enlarged to increase the amount of ink used. You can do it. Also, in the slit 18 for storing the ink, the slit width can be kept constant by supporting the convex portions 16 at appropriate intervals against the capillary force for narrowing the slit 18 width. It can function as a stable ink reservoir 13. Further, the thickness of the sheet body 15 can be reduced, and the efficiency of the ink storage space in the volume of the ink storage body 13 can be increased. The sheet 15 can be processed in the form of a flat sheet when it is optimally processed in terms of wettability with ink, thereby increasing the variety of inks used, such as water and oil.

 Next, a specific example of the present invention and its operation will be described.

Examples of the sheet body used in the ink reservoir of the present invention (Examples 1 to 4 of the present invention) will be described. l. α) Material

 Material (a) (Thickness: about 100 m) Tetron film # 10 OS (Teijin Co., Ltd.) Material (b) (Thickness: about 188tzm) Tetron film # 188 S (Teijin Co., Ltd.) Material (C) (Thickness: about 100 zm) Stainless steel plate (sus 304)

 Material (d) (Thickness: about 100 / zm) Tetron film # 100 S (Teijin Co., Ltd. product)

(2) Plate shape of donut plate: outer diameter ø20, inner diameter 05

 (3) Emboss position (from the center of the film);

Radius R ₃ = Equally divided (20 °) at 9 positions, outer diameter ø 1 ramx 18

Radius R ₂ = 6 equally divided (30 °) at hidden position Outer diameter ø 1 mm x 12

 Radius R, = 3.5mm equally divided (60 °) outside diameter ø lmrax 6 pieces

 (4) Emboss height: 0.1 mm

 However, for material (d), a dot of ø Ιππη is printed by flexographic printing at a height of 0.1 Martian printing (the same location as the embossed position)

 (5) Number of sheets used: 50 sheets (Materials (a), (c) and (d) are about 10 mm high, and Material (b) is about 14.5 hidden height)

 2. Ink conduction path; polyester fiber bundle batting without jacket

 3. Ink tank volume; 4.2 ml (millilitre)

Further, the inventor made a sheet body having a structure shown in FIGS. 5 and 6 by injection molding in order to confirm the operation and effect of the ink jet printer according to the present invention. In this case, a relay core in which the fiber cores are bundled is created as an ink conduction path (19) with the same outer diameter as the diameter of the conduction hole at the center of the sheet, and 50 sheets are aligned in the same direction on the front and back. It accumulates in a separately created ink tank, and inserts the relay core into the central hole of the sheet. Then, an ink reservoir (1 3) was created.

 Then, an ink tank (1 2) composed of an ink reservoir (13) and an ink reservoir (14) is incorporated in the ink jet head (1), and is provided as a raw ink jet printer. The necessary tests were performed for the items to be performed.

 The results of testing the above-described ink jet printer according to the present invention and a conventional product (commercially available ink jet printer head) were as follows. Printer according to the present invention

 50 50

 Ink storage volume (ml) 1. 5 0.39

 Inki reservoir effective length (area) 15 25

 Ink reservoir slit width (mm) 0.1 0.3

 Ink tank volume (ml) 4 1

 The ink is forcibly overflowed into the ink reservoir due to the change in the outside air temperature (after leaving it in a low-temperature room and then leaving it at room temperature) and the change in the outside air pressure (after leaving it in a decompression room and leaving it to stand in a normal pressure room). A print test was performed by letting it flow. Then, the ink in the ink tank (ink storage section) was consumed first by the ink in the ink reservoir and became empty, and then the ink in the tank was consumed.

 In addition, the head of the ink jet head and the end of the ink reservoir on the tank side (the end of the ink reservoir located at the highest position from the ink jet head) are appropriately sized and heated or depressurized. Even if the ink overflowed fully into the ink reservoir in this state, the ink did not flow out to the head and the front of the ink reservoir in both cases. In the same state, the ink was completely overflowed into the ink reservoir and returned to the tank by repeating heating and cooling, but the head and the ink to the front of the ink reservoir were also changed. No spill was seen.

Therefore, although the present invention uses the same number of sheets as the conventional product, Also, the ink storage amount is large and the effective length of the ink storage body is short, that is, compact. Therefore, according to the present invention, it is possible to improve the function and size of the ink jet head.

 Note that the first embodiment shows a preferable embodiment of the present invention, and the present invention is not limited to the first embodiment.

 That is, in the first embodiment, the ink tank is integrated with the ink storage body and is made disposable by the cartridge, but the present invention is not limited to this, and various modifications may be made within the scope of the present invention. For example, it is possible to integrate the ink reservoir with the head to make it disposable, or to transfer the ink tank 27 to the ink jet of the above-described embodiment as in a first modified example shown in FIG. It can be detachably attached to the pad 1. In the first modification, the rear end portion 28 a of the case 28 in which the ink storage body 13 is housed becomes a suspicion so that the front end of the ink tank 27 fits outside. An air replacement port 29 can be formed in a slit shape in 28a. The other configuration is the same as that of the first embodiment, and the same parts are denoted by the same reference numerals and description thereof will be omitted.

 Also, as in the second modification of FIG. 8 (a), the sheet storage bodies 15 are vertically overlapped with each other in a horizontal direction to form an ink reservoir 30, and the substrate 3 and the nozzle The ink storage part 31 and the ink storage body 30 can be formed in the ink tank 32 by arranging the ink storage part 31 and the ink storage body 30 in the lateral direction from the side closer to the plate 4.

 In addition, an ink conduction path 33 composed of a cylindrical relay core with a flat batting or a jacket without a jacket is formed under the ink reservoir 30 to reduce the ink in the ink reservoir 30. It is also possible to introduce into the ink storage section 31.

Also, as in the third modification shown in FIG. 8 (b), even if the ink reservoirs are vertically arranged, the ink conduction path 19 is not at the center of the sheet 15 but at the sheet What is disposed at the end in the plane of the body 15 is also within the scope of the ink storage device and the ink jet recording apparatus of the present invention. In addition to the arrangement of the ink tank adjacent to the ink holder (Fig. 3 or Fig. 8 (a), etc.), there is also a structure in which the ink tank is separated from the ink holder and connected by an appropriate ink passage. Within the scope of the invention.

 Hereinafter, a second embodiment of the present invention will be described in detail with reference to the drawings.

 Fig. 9 is a writing instrument according to the second embodiment, Fig. 10 is an explanatory view of a sheet body, (a) is a plan view, (b) is a cross-sectional view taken along line A-A of (a), ( c) is an enlarged view of part B of (b). FIG. 11 is an explanatory diagram of a state in which sheet bodies are stacked.

 As shown in FIG. 9, the writing implement 101 of the embodiment is provided with an ink lead 110 and a pen core (corresponding to a drawing part) 112 mounted inside an outer barrel 108. A passage 1 14 and an ink reservoir (collector) 1 16 for storing an overflow ink are provided, and an air replacement hole 1 18 is provided in the ink tank 110. The ink reservoirs 116 are formed by stacking sheet-like sheets 120 that spread in a flat plate shape, and are arranged at positions at appropriate intervals on the surface of the sheet-like sheets 120. A plurality of desired convex portions having substantially the same convex height (corresponding to the convex portions) 1 22 are applied by embossing or printing, and the protruding portions 1 2 2 are desired. By forming the gaps 1 24 that store the overflowing ink by being positioned substantially in parallel at intervals of, all the sheet bodies 1 2 0 that constitute the gaps 1 2 4 are formed by the ink conduction paths 1. It is in contact with 14.

This will be described in more detail. The outer cylinder 1108 has a substantially cylindrical shape as a whole and is a portion serving as a handle for holding the writing implement 101, and includes the ink tank 110 and the ink reservoir 116. And a cylindrical main body 108a that includes the main body 108a, and is connected to the tip of the main body 108a through a shoulder-shaped step 108b and protrudes forward. Also has a pen-core holding portion 108c that is a small-diameter cylindrical shape and holds the pen-core 112 inside. A tail plug 126 is fitted to the open rear end of the main body 108a. Also, in this embodiment, the front means the pen core 112 side, and the rear means the tail plug 126 side. The ink tank 110 is a container for storing a liquid ink to be written or applied, and the tip of the main body 110 a having a smaller diameter than the inner diameter of the outer barrel 110 is formed as an opening 110 b. I have. Then, the periphery of the opening 110b is folded back toward the rear to cover the main body 110a in the form of a scar or an umbrella until the middle of the body 110a, and the outer diameter of the outer barrel 110 is A large-diameter skirt portion 110c corresponding to the inner peripheral diameter is integrally formed, and the skirt portion 110c fits on the inner peripheral surface portion of the outer cylinder 110 main body 108a. . At the same time, a lid member 128 is fitted into the opening 110b, and the lid member 128 is attached to and held in the ink conduction path 114 at the center thereof. An outer cylindrical portion 128b that has an extended inner cylindrical portion 128a and that is closely fitted into the opening 110b is formed at a portion near the periphery so as to protrude rearward.

 As the pen core 112, a fiber material, a filter material, a foamed resin or a sintered material, a plastic molded pen core, and a brush made of a natural or synthetic resin can be used. In this embodiment, a fiber bundle core or a sintered core is used. The pen core 1 12 is a point portion having a tapered tip portion 1 12 f and a cylindrical shape extending from the center to the rear end portion 112 r and has a bullet shape as a whole. is there. At the rear end 1 12 r of the pen core 1 12, a columnar ink conduction path 1 14 is joined to the body or a separate body. Further, the pen core 112 is fitted and supported from the pen core holding part 108 c so as to protrude from the tip (point).

 The ink reservoir 1 16 is located in the space 1 30 surrounded by the inner periphery of the front end of the outer cylinder 1 108 a and the lid 1 at the front end. , Multiple leaflets

120 is a state where a plurality of layers are overlapped in the direction of the central axis (indicated by reference numeral 120e in FIGS. 10 and 11) and the ink conduction path 1 14 is inserted in common at the center. In space

It is stored in 130. The space 130 is closed in a state where the shoulder-like stepped portion 108b of the outer barrel 110 projects in a rib shape and supports the single-leaf body 120. At the tip of the writing implement 1, a cap body 1 3 2 that covers the tip 1 1 2 f of the pen core 1 1 2 protruding from the pen core holding section 1 08 c of the outer cylinder 1 108 holds the pen core. Part 1 08 Fit outside.

 Also, the air replacement hole 118 has an inner peripheral surface of the pen core holding portion 108 c formed in a rib shape, and an air circulation groove is formed between the air core and the pen core connecting the outside air to the space portion 130. A formed portion 1 18 a, a gap 1 18 b between the outer peripheral edge of the single-sheet body 120 of the space portion 130 and the outer peripheral surface of the outer barrel 110, a lid member A gap 1 18 c between 1 2 8 and the ink conduction path 1 1 4. The air replacement holes 1 18 can be formed at other appropriate positions.

As shown in FIG. 10, the single-leaf body 120 is a substantially flat plate having a circular shape in a plan view, and has a convex portion 1 22 Is formed, and a central hole 120a through which the ink conduction path 114 is passed is formed at the center. The convex portions 122 are arranged in three rows of inner, middle, and outer along the peripheral edge of the central hole 120a and the outer peripheral edge of the sheet 120, respectively. As a specific example of the single-leaf body 120, the same shape, dimensions, material, and manufacturing method as those of the single-leaf body 15 in FIG. 5 or FIG. 6 can be used. 1 Illustrated in Fig. 1 only. In this case various dimensions: diameter D ,, median pore size D _2, the outer diameter D _3, Maihatai thickness ti, the convex portion 1 2 2 height t _2, the convex portions inside the column radius R i, middle side column radius R _2, the outer radius R ₃ and the like can be changed suitably designed in different sizes.

 Note that the shape of the single-leaf body 120 is not limited to the above-mentioned disc shape, and may be formed in an appropriate shape such as a square. Further, in the embodiment, the convex portions (convex portions) are arranged concentrically and equally, but the present invention is not limited to this. For example, by arranging the convex portions of the single-leaf body at random, it is possible to prevent the convex portions from entering the concave portions of the emboss. Further, in the production of a single-sheet body, a sheet body or a roll body having a wide material and having a convex portion formed by embossing or a printing method or the like can be punched into a single-sheet body shape to produce a single-sheet body.

The sheet 120 can be formed from a plastic film or from a metal plate. Further, the convex portion 122 of the sheet body 120 can be formed by a printing method in addition to the embossing. In this case, the ink may be raised to a desired height with a printing ink by means such as flexographic printing, or may be heated and heated after printing so that the printing ink portion foams and swells.

 Further, a desired interval is obtained between the stacked sheets 120 by the protruding portions of the sheets 120, and it is preferable that the sheets 120 are parallel to each other. However, the performance of the ink holding member can be exhibited. As long as the sheet bodies are almost parallel, it is sufficient.

 The ink passages 114 can be made of felt, nonwoven fabric, or a relay core made using a fiber bundle of long fibers or short fibers. In addition, as the other ink conducting path 114, for example, a rod-shaped one having a slit formed on the outside can be used. The ink passages 114 are formed by extending the back of a pen core 112 made of a fiber bundle of long fibers or short fibers to an ink tank 110, and the pen cores 112 The ink passages 1 1 and 4 could be formed integrally.

 The ink conduction path 114 can be made of a relay core made using a plastic sintered core. The ink passage 1 114 is formed by extending the back of the pen core 112 made of a sintered plastic core to the ink tank 110, and the ink core 1 1 2 1 1 4 can be formed in the body.

According to the above-described embodiment, the ink storage body 1 16 in which the single-leaf body 120 formed with the convex portion 122 by embossing is enlarged to increase the area of the single-leaf body 120. As a result, it is possible to increase the volume of the ink reservoir 1 16 for storing the overflow ink, so that the ink tank 110 can be enlarged and the amount of ink used can be increased. . In addition, in the slit for storing ink, the slit width can be kept constant by being supported by the convex portions 122 at appropriate intervals against the capillary force for narrowing the slit width. Thus, it can function as a stable ink reservoir 1 16. In addition, the thickness of the sheet body 120 can be reduced, and the efficiency of the ink storage body 116 as the volume of the ink storage space can be increased. When the sheet 120 is subjected to the optimal processing in terms of wettability with the ink when it is in the form of a flat plate, the variety of inks used, such as aqueous and oily, can be increased.

 Next, a specific example of the present invention and its operation will be described.

 Examples of sheet bodies of the present invention (Examples 1 to 4 of the present invention) will be described.

1. (1) Material

 Material (a) (Thickness: about 100 m) Tetoron film # 100 S (Teijin Co., Ltd. product) Material (b) (Thickness: about 188 / im) Tetron film # 188 S (Teijin Co., Ltd. product) Material ( c) (Thickness: about 100 / zm) Stainless steel plate (sus 304)

 Material (Me (thickness: about 100 / m) Tetron film # 100 S (Teijin Corporation product)

(2) Donut plate-shaped single piece; outer diameter ø20, inner diameter ø5

 (3) Emboss position (from the center of the film);

radius

Equally divided into (20 °) and outer diameter ø 1 x 18

Radius R ₂ = 6 equally divided (30 °) at the position of the marauder, outer diameter ø 1 mrax 12

 Radius R, = 3.5 mm equally divided (60 °) outer diameter ø 1 marauder X 6 pieces

 (4) Emboss height; 0.1 hidden

 However, the material (only the first ø lnim dot is printed by flexographic printing at a height of 0.1 mm (the same location as the embossed position)

 (5) Number of sheets used: 50 sheets (Material (a). (C) and (d) are about 10 mm high, and Material (b) is about 14.5 mm high)

 2. Pen core (e); fiber bundle core

 Pen core (f); firing; ρέ'ji,

3. Ink conduction path (g); polyester fiber bundle batting without outer skin Ink conduction path (i); long extension of rear end of pen core (e) Ink conduction path (j); rear extension of pen core long

4. Ink tank capacity (both the present invention and comparative examples)

 ; 4.2 ml (milliliter)

 5. Comparative example specifications (k) (material = (a));

 O.D.ø2 Oram, I.D.ø5 Marauder

 Comparative example specification (1) (Material = (b)); Single-leaf donut shape

 Outer diameter ø20 mm, inner diameter ø5 ram

 Comparative example specification On) (Material = (a));

 Cut OD of 010, ID of ø5mm into C type with 1 width cut

 Comparative example specifications (n) (Material = (b)): Slit for slitting

 Outer diameter 01 Oram, inner diameter ø 5

 Table 1 below shows the test results of the above-mentioned invention examples and comparative examples.

In the case of this test, with the ink conduction path being located at the center, only the sheets are overlapped in the present invention example, and in the comparative example, the spacers are sandwiched between the sheets to overlap the ink writing implement. A reservoir was formed. The number of sheets used is 50 as shown in 1. (5). Table 1 shows the specifications of each writing instrument according to (A) to (D), and also shows the test results.

Writing instrument specifications and test results of the present invention examples and comparative examples

 (Note) Storage stability test of ink overflowing inside the collector.

 Hold the overflow ink in the collector, leave the pen tip side down, observe the behavior of the storage ink, and test the stability.

 (The squares correspond to the squares of the writing instrument specification.)

 〇 mark; stable after one month

X mark; direct current from pen point within 30 minutes

As shown in Table 1, this writing example was stable in one writing month in any of the writing instrument specifications (〜) to (D), so good results were obtained. In contrast, in each of the comparative examples, in all writing instrument specifications (Α) to (D), the ink flowed out from the pen tip within 30 minutes (DC was applied). Was unbearable.

 Therefore, it was confirmed that the present invention can exert a function as a stable ink reservoir. Industrial applicability

 As described above, since the present invention is configured, the manufacturing limit of the thickness of the blade portion is relaxed, and the storage capacity of the ink storage body can be increased easily and inexpensively without technical limitations. It can be advantageously used in an occupied volume, for example, for increasing the amount of print, and particularly for preparing a four-color head for color copying. In addition, by selecting an appropriate material as the sheet material, for example, by using a biaxially stretched polyester film, all of a water-based ink and an oil-based ink can be used. It can be manufactured at low cost.

 In addition, it is possible to obtain an ink jet recording apparatus in which ink does not leak from the head and the front part of the ink reservoir due to a temperature change.

 In addition, handling such as replacement of the ink jet head or ink reservoir will be facilitated.

 Further, according to the present invention, the limit of the thickness of the blade portion can be relaxed, the ink storage capacity in the collector can be increased, and the functionality can be improved. For example, when a biaxially stretched polyester film is used, it can be used for all oil-based and water-based inks, and has an excellent effect that a collector for a writing instrument can be easily and inexpensively manufactured.

Claims

The scope of the claims

1. In an ink reservoir for temporarily storing ink overflowing from an ink tank, the ink reservoir is formed by stacking flat-plate-like sheets, and the sheet is composed of A plurality of projections are formed at appropriate intervals on the surface of the surface, and the projections allow adjacent stacked sheets to be positioned substantially in parallel at desired intervals to maintain the overflow ink. An ink reservoir, wherein a gap for storing the ink is formed, and all the sheets constituting the gap are in contact with the ink conduction path.

 2. The ink reservoir according to claim 1, wherein the projection is formed by a printing method.

 3. The storage container according to claim 1, wherein the sheet is made of a plastic film.

 4. The ink reservoir according to claim 1 or 2, wherein the sheet is made of a metal plate.

 5. The ink passage is made of a felt nonwoven fabric or a fiber convergence body made of long fibers or short fibers, a cotton-like material, a communicating porous body, a communicating porous foam, or the like. 5. The ink reservoir according to any one of, 3 and 4.

 6. The ink passage according to any one of claims 1, 2, 3, and 4, wherein the ink passage holds and guides the ink by a capillary force formed of a plastic molded body by extrusion or injection. Inky reservoir.

 7. In an ink jet recording device that has a reservoir for temporarily storing overflowing ink from the ink tank in the ink jet head,

The ink retaining body is configured by stacking discarded bodies that spread in a flat plate shape, and the sheet body has a plurality of convex portions formed at appropriate intervals on the surface thereof. The convex portion forms a gap portion for storing overflowing ink by arranging the stacked adjacent sheets at a desired interval substantially in parallel with each other, and forms all the gap portions. An ink jet recording device _c , characterized in that the sheet body of

8. The ink jet recording apparatus according to claim 7, wherein the ink storage body according to any one of claims 2 to 6 is used for the ink storage body.

 9. The ink jet recording apparatus according to claim 7, wherein the ink reservoir and the ink jet head are integrated.

 10. The ink jet recording apparatus according to claim 7, wherein the ink storage unit and the ink tank are integrated into a cartridge.

 11. The ink jet recording apparatus according to claim 7, wherein the ink tank is detachably attached to the ink reservoir.

 1 2. The ink reservoir contains a plurality of sheets stacked in a container, and the interval between the inner surface of the container and the sheet is wider than the slit interval between the sheets. The ink jet recording apparatus according to claim 7, wherein the recording is performed.

 1 3. The ink jet recording apparatus according to claim 7, wherein the sheet bodies are overlapped in the horizontal direction with the plane direction being vertical.

 1 4. In a writing instrument with an ink passage between the ink tank and the drawing area and an ink reservoir for storing overflowing ink, and an ink replacement hole provided in the ink tank, the ink reservoir is The sheet is formed by stacking sheet-like bodies that spread in a flat plate shape, and the sheet-like body has a plurality of protrusions formed at appropriate positions on its surface, and the protrusions are stacked. The adjacent sheets are positioned substantially parallel to each other at a desired interval to form a gap for storing overflowing ink, and all the sheets forming the gap contact the ink conduction path. Writing implement characterized by the fact that

 15. The brush according to claim 14, wherein the protrusions are formed by a printing method.

S: 5 = ¾ro

 16. The writing implement according to claim 14 or 15, wherein the sheet body is made of a plastic film.

17. The sheet according to claim 14, wherein the sheet is made of a metal plate. Writing instrument.

 18. The ink passage is made of felt non-woven fabric or a fiber convergence body made of long fibers or short fibers, a cotton-like material, a communicating porous body, a communicating porous foam, or the like. 18. The writing implement according to any one of, 16 and 17.

19. The ink passage is a pen tip made using a fiber converging body made of long fiber or short fiber, and the back side is extended to the ink tank. The writing implement according to any one of claims 14, 15, 16 and 17, wherein the writing implement is characterized in that:

 20. The writing implement according to any one of claims 14, 15, 16 and 17, wherein the ink conduction path is formed of a relay core made using a plastic sintered core.

 21. The ink passage, wherein the back side of the pen tip formed by using a plastic sintered core is extended to the ink tank, and the pen tip and the ink passage are integrally formed. , 15, 16 and 17

A lipstick.