JP2010089383A - Liquid directly feeding type instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To fully satisfy each of the discharging properties of liquid, the leakage prevention of the liquid, and the suppression of drying of a tip member. <P>SOLUTION: A liquid occluding member 30 having capillary action is provided in a casing K, in which a liquid storage chamber 10 is formed, at a tip member 40 side from the liquid storage chamber 10. The rear side portion 30a at the liquid storage chamber 10 side of the liquid storage chamber 30 blocks an opening part 12 at the tip member 40 side of the liquid storage chamber 10. In the liquid occluding member 30, the density of the rear side portion 30a, which is made in the compressed state, is made higher than that of the front side portion 30b at the tip member 40 side. A liquid guiding member 50 connected with the tip member 40 is located in the rear side portion 30a of the liquid occluding member 30, which is not exposed to the liquid storage chamber 10. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a direct liquid type instrument such as a writing instrument or a makeup tool that is a direct liquid type.

In direct liquid instruments, for example, direct liquid writing instruments, it is often used to store ink directly in an ink storage chamber in a liquid state from the viewpoint of storing a large amount of ink as a liquid. In this case, the ink supply from the ink storage chamber to the tip member serving as the pen tip is also performed by utilizing the capillary phenomenon. In Patent Document 1, an ink occlusion body having a capillary phenomenon is arranged next to an ink reservoir chamber, and an elongated ink guiding member connected to a tip member is passed through the ink occlusion body and extends to the ink reservoir chamber. The set up is disclosed. Patent Document 1 also discloses that the end portion on the ink storage chamber side of the ink occlusion body is compressed so as to have a small diameter, thereby increasing the capillary phenomenon of the compressed portion.
Japanese Patent No. 3917293

  By the way, in a direct liquid type instrument, sufficient dischargeability of ink from the tip member, prevention of ink leakage due to fluctuations in temperature and atmospheric pressure, even if left for a long time with the tip member facing upward, etc. It is necessary to sufficiently satisfy the dry deterrence performance that prevents the tip member from drying.

  However, in the thing of patent document 1, since the elongate ink guide member extended from a front-end | tip member has penetrated the ink occlusion body and reached the ink storage chamber (exposed), the ink dischargeability and Although it is preferable in terms of inhibiting drying of the tip member, the ink in the ink storage chamber reaches the tip member via the ink derivative due to changes in temperature, atmospheric pressure, and impact equalization, and ink leakage is likely to occur. It becomes. That is, in the thing of patent document 1, since the ink occlusion body has only covered a part of the longitudinal direction of the ink derivative from the outer periphery, there is room for further improvement from the viewpoint of ink leakage. More specifically, the ink occlusion body in Patent Document 1 functions only as a so-called bellows, and by changing the density in the longitudinal direction, the ink occlusion capacity of the portion close to the ink storage chamber is reduced to that of the portion close to the pen tip. The ink storage capacity is higher than the ink storage capacity.

  The present invention has been made in view of the circumstances as described above, and its purpose is to provide a direct liquid device that can sufficiently satisfy the liquid discharge performance, the liquid leakage prevention, and the drying suppression of the tip member. It is to provide.

In order to achieve the above object, in the present invention, basically, in a member having a capillary phenomenon, liquid does not substantially permeate (move) from a high density portion to a low density portion. This principle is used. Specifically, the following solution is adopted in the present invention. That is, as described in claim 1 in the claims,
A direct liquid type instrument configured to supply the liquid in the liquid storage chamber to the tip member by capillary action,
In the casing in which the liquid storage chamber is configured, a liquid storage member having a capillary phenomenon is disposed on the tip member side of the liquid storage chamber,
The liquid storage member closes the opening on the tip member side of the liquid storage chamber with a rear portion on the liquid storage chamber side,
The liquid occluding member has the rear portion in a compressed state, and the density of the rear portion is higher than the density of the front portion on the tip member side,
The tip member and the liquid storage member are connected by a liquid guide member having a capillary action,
The liquid guide member is located in the rear portion of the liquid storage member, but is not exposed to the liquid storage chamber.
It is like that.

  According to the above solution, the liquid storage member is configured such that the density of the compressed rear side portion is higher than the density of the front side portion on the tip member side. Among them, the rear part having a high density is easily reached by capillary action, but the rear part having a high density does not reach the front part having a low density. Then, the liquid in the liquid storage chamber is supplied from the rear portion of the liquid storage member to the tip member via the liquid guide member, and sufficient liquid discharge performance can be ensured. In addition, even if the tip member is left for a long time in the upward state, the liquid stored in the rear portion of the liquid storage member is supplied to the tip member, and drying of the tip member is sufficiently suppressed. Become. Furthermore, even if the liquid in the liquid storage chamber leaks to the outside due to fluctuations or vibrations in the temperature and pressure, the liquid to be leaked is absorbed by the front portion of the liquid storage member and leaks to the outside. This is surely prevented. In this way, the liquid occlusion member has a rear portion that is a plug that constantly faces the liquid storage chamber and constantly occludes the liquid inside thereof, and functions as an intermediate liquid supply source to the tip member. The front side portion functions as a so-called bellows and performs a function of preventing liquid leakage. As described above, the liquid occlusion member fulfills the two functions as described above, so that it is possible to satisfactorily satisfy the ejection performance, the drying suppression, and the leakage prevention.

A preferred mode based on the above solution is as described in claim 2 and the following claims. That is,
In the casing, an intermediate chamber is formed which is in communication with the liquid storage chamber and disposed with the liquid storage member on the tip member side of the liquid storage chamber.
The rear chamber portion on the liquid storage chamber side of the intermediate chamber is a small diameter portion that is reduced in diameter relative to the front chamber portion on the tip member side,
The liquid occlusion member has a higher density than the front portion located on the tip member side than the small diameter portion by compressing the rear portion located on the small diameter portion.
(Corresponding to claim 2). In this case, a small-diameter portion is formed in the space where the liquid storage member is disposed, and the rear-side portion of the liquid storage member can be reliably brought into a desired compressed state by the small-diameter portion.

The liquid storage member is configured as a rod-like fiber bundle having pores continuous in the longitudinal direction with hydrophobic fibers,
The porosity of the rod-shaped fiber bundle is 75 to 90% in a free state before being inserted into the intermediate chamber,
The porosity of the rear end portion inserted into the small-diameter portion of the rod-like fiber bundle and brought into a compressed state is reduced by 5 to 15% compared to the porosity in the free state,
(Corresponding to claim 3). In this case, a preferable setting of the liquid storage member is provided.

The liquid storage chamber is configured by a bottomed cylindrical cartridge that is disposed in the casing and has an opening on the tip member side,
The opening of the cartridge is covered by the rear portion of the liquid storage member.
(Corresponding to claim 4). In this case, the liquid storage chamber can be easily formed in the casing using the cartridge. Further, since the opening of the cartridge is covered with the liquid storage member, for example, by assembling the opening of the cartridge filled with the liquid with the liquid storage member in advance, the assembly of the cartridge and the liquid storage member Can be easily incorporated into the casing.

  An outer peripheral surface of the front portion of the liquid storage member is separated from an inner peripheral surface of the casing (corresponding to claim 5). In this case, the liquid occluded in the rear side portion of the liquid occlusion member is not formed between the outer peripheral surface of the front side portion of the liquid occlusion member and the inner peripheral surface of the casing, so that the liquid occluded in the rear side portion of the liquid occlusion member This is preferable in order to prevent the situation of inadvertent movement in a more reliable manner.

A partition that separates the liquid storage chamber and the intermediate chamber is formed in the casing,
The partition is formed with a communication port that communicates the liquid storage chamber and the intermediate chamber,
The liquid in the liquid storage chamber is supplied to the rear portion located in the small diameter portion of the liquid storage member through the communication port.
(Corresponding to claim 6). In this case, when the liquid occlusion member is inserted into the casing from the intermediate chamber side, it may be performed until the liquid occlusion member abuts against the partition wall, and the liquid occlusion member can be easily positioned. Further, the liquid in the liquid storage chamber can be reliably supplied to the rear portion of the liquid storage member via the communication port.

The tip member is formed by a member having capillary action;
The liquid guide member is integrally formed with the tip member;
(Corresponding to claim 7). In this case, the tip member and the liquid guide member are integrally formed, which is preferable in terms of facilitating manufacturing and reducing the number of parts.

  The liquid is ink, the tip member is set for a writing instrument, and the casing is a straight liquid writing instrument that is elongated so that it can be gripped with fingers (corresponding to claim 8). In this case, there is provided a direct liquid writing instrument that sufficiently satisfies the ink discharge performance, leakage prevention, and drying inhibition.

  According to the present invention, it is possible to satisfactorily satisfy the liquid discharge performance, leakage prevention, and drying inhibition.

  FIG. 1 shows an example in which the present invention is applied to a direct liquid type writing instrument. In the figure, reference numeral 1 denotes a main casing. The main casing 1 is formed in an elongated cylindrical shape. The rear end of the main body casing 1 is opened, and the rear end opening is sealed by a lid member 2 fixed to the main body casing 1. The front end of the main casing 1 is also opened, and the front end casing 3 is fixed to the opening at the front end.

  The main body casing 1, the lid member 2, and the tip casing 3 constitute a casing K. In the embodiment, the main body casing 1, the lid member 2, and the tip casing 3 are each formed of a synthetic resin, but can be made of an appropriate material such as a metal, and the materials are different from each other. You can also. Of course, the casing K can be divided into two or four or more, or can be formed as a single piece.

  In the casing K (main body casing 1), a partition wall 11 is formed at a substantially intermediate portion in the longitudinal direction. In the casing K, the liquid storage chamber 10 is formed on the rear end (lower end in FIG. 1) side with the partition wall 11 as a boundary, and the intermediate chamber 20 is formed on the front end side. A communication port 12 that connects the two chambers 10 and 20 is formed in the partition wall 11. The communication port 12 is not limited to a single large opening, and may be a collection of many small holes.

  In the liquid storage chamber 10, ink as a liquid is stored. A liquid storage member 30 is disposed in the intermediate chamber 20. A tip member 40 is located at the tip of the tip casing 3. The tip member 40 is integrally formed with a liquid guide member 50 that extends long backward. The rear end portion of the liquid guide member 50 is located in the liquid storage member 30. The tip member 40 and the liquid guide member 50 are formed of a member having a capillary phenomenon such as felt. Of course, the shape of the tip member 40 is a shape suitable for writing, and is set to a so-called sign pen shape in the embodiment. The tip member 40 is covered with a cap 5 that is detachably fitted to the tip casing 3. In the embodiment, at least a portion constituting the liquid storage chamber 10 of the main casing 1 is made transparent or semi-transparent so that the remaining amount of liquid inside can be easily confirmed visually from the outside.

  The liquid storage member 30 is configured as a rod-like fiber bundle by bundling hydrophobic fibers. Specifically, for example, by heating a blend of 3% to 20% (preferably 5% to 15%) of a composite polypropylene fiber having a low melting point with polypropylene short fiber, the contact portions of the fibers are melted together. It is configured to be worn and has a continuous pore in the axial direction and has a capillary action. And the liquid occlusion member 30 comprised from such a rod-shaped fiber bundle is made uniform in the outer diameter over the full length in the free state (state where an external force does not act) (cross-sectional circle). Further, the porosity of the liquid storage member 30 is 75 to 90%, and is uniform over the entire length.

  Of the intermediate chamber 20, the inner diameter of the rear chamber portion 20 a on the liquid storage chamber 10 side is a small diameter portion made smaller than the inner diameter of the front chamber portion 20 b on the tip member 40 side. The liquid occlusion member 30 has an outer diameter that is slightly smaller than the inner diameter of the front chamber portion 20b in a free state (preferably not to contact the inner wall of the front chamber portion 20b). A boundary portion between the rear chamber portion 20a and the front chamber portion 20b is a tapered surface 20c that gradually decreases in diameter toward the rear chamber portion 20b.

  The liquid occlusion member 30 is inserted into the intermediate chamber 20 from the front chamber portion 20b side to the rear chamber portion 20a side and inserted to a position where it abuts against the partition wall 11. During insertion, the liquid occlusion member 30 can be smoothly inserted into the rear chamber portion 20a by the tapered surface 20c. By this insertion, the liquid storage member 30 is compressed into the small-diameter rear portion 30a in the rear chamber portion 20a, and the large-diameter front portion 30b that is practically not compressed in the front chamber portion 20b. Then, the porosity of the rear portion 30a of the liquid storage member 30 is reduced by 5 to 15 with respect to the porosity in the free state (that is, the porosity of the front portion 30b). Thus, as for the liquid occlusion member 30, the back side part 30b is made into high density compared with the front side part 30b.

  The rear end portion of the liquid guide member 50 passes through the front portion 30b of the liquid storage member 30 and reaches the rear portion 30a. However, the liquid guiding member 50 is prevented from reaching the liquid storage chamber 10 (including the communication port 12), so that the liquid in the liquid storage chamber 10 is not directly supplied without passing through the liquid storage member 30. Is set.

  Here, in the embodiment, the inner diameter of the front chamber portion 20b of the intermediate chamber 20 is, for example, 8φ, the inner diameter of the rear chamber portion 20a is, for example, 6φ, and the inner diameter of the communication port 12 is, for example, 4φ. Further, the porosity of the front side portion 20b of the liquid storage member 30 is set to 87%, for example, and the porosity of the rear side portion 20a is set to 76%, for example. The inner diameter of the communication port 12 may be a size that allows the liquid in the liquid storage chamber 20 to be smoothly supplied to the liquid storage member 30 (rear side portion 30a), but the rear side portion 30a of the liquid storage member 30 is not limited. For example, as shown in FIG. 3, it can be set so as to increase as the inner diameter of the front chamber portion 20b of the intermediate chamber 20 increases (outside the rear portion 30a). The diameter is set so as to be larger than the inner diameter of the communication port 12 and smaller than the outer diameter of the front portion 30b). In addition, the outer diameter of the front side portion 30b of the liquid storage member 30 is set to be slightly smaller than the inner diameter of the front chamber portion 20b, and is between the outer peripheral surface of the front side portion 30b and the inner peripheral surface of the front chamber portion 20b. It is preferable to form a relatively large gap in this portion in order to prevent a minimum gap having a capillary phenomenon from being formed in this portion (more movement of the liquid from the rear portion 30b toward the front portion 30a). Surely blocked).

  FIG. 2 is an exploded view of the direct liquid writing instrument shown in FIG. 1, and its assembly is performed, for example, as follows. First, the main body casing 1 with its lower end covered by the lid member 2 is directed upward, and liquid is supplied into the liquid storage chamber 10 from above. Next, the liquid storage member 30 is inserted into the main casing 1 from above until it comes into contact with the partition wall 11. During this insertion, the rear portion 30a of the liquid storage member 30 positioned in the rear chamber portion 20a of the intermediate chamber 20 is reduced in diameter and compressed, and the porosity is reduced. Become.

  The tip casing 3 is fitted and fixed to the upper end of the main casing 1. Thereafter, the liquid guide member 50 integrally formed with the tip member 40 is inserted through the tip opening 3 a of the tip casing 3. The liquid guide member 50 is inserted until the tip member 40 contacts the tip surface of the tip casing 3, and in this contact state, the rear end portion of the liquid guide member 50 is the rear portion of the liquid storage member 30. 30a is reached (however, it does not reach the communication port 12 or the liquid storage chamber 10). The liquid guide member 50 is inserted into the liquid occlusion member 30 while the front end casing 3 is fitted and fixed to the main body casing 1 with the front end opening 3 a of the front end casing 3 inserted in advance. You may do it.

  In the direct liquid type writing instrument configured as described above, the liquid (ink in the embodiment) in the liquid storage chamber 10 is stored in the rear portion 30a of the liquid storage member 30 through the communication port 12. The Since the rear portion 30a is always in communication with the liquid storage chamber 10 via the communication port 12, a state where the liquid is always stored in the rear portion 30a is ensured.

  Since the density of the rear part 30a is higher than the density of the front part 30b, the liquid occluded in the rear part 30a moves to the front part 30a unless it receives a large change in temperature or atmospheric pressure or a large impact. Substantially does not occur. The liquid occluded in the rear portion 30 a is supplied to the tip member 40 through the liquid guide member 50. Since the tip member 40 is connected to the rear portion 30a that has always occluded the liquid via the liquid guide member 50, the dischargeability of the liquid from the tip member 40 is sufficiently ensured. Further, even if the cap 5 is removed and left for a long time in the upward state (the state shown in FIG. 1), the liquid occluded in the rear portion 30a is supplied to the tip member 40 via the liquid guide member 50. The situation where the tip member 40 is dried is also prevented.

  When there is a large change in temperature or pressure, or when a large impact is applied, the liquid in the liquid storage chamber 10 may leak out to the outside, that is, the tip member 40 side. In this case, a situation in which the front portion 30b of the liquid storage member 30 stores the liquid that is about to leak out and the liquid leaks out of the casing K is reliably prevented.

  Thus, the liquid storage member 30 has a function as an intermediate liquid supply source in which the rear portion 30 a stores the liquid in the liquid storage chamber 10 and supplies the liquid to the tip member 40. In addition, the front side portion 30b of the liquid occlusion member 30 performs a so-called bellows function of occlusion of the liquid that leaks to the outside. Since the rod-like fiber bundle constituting the liquid storage member 30 is composed of hydrophobic fibers, the fiber itself does not occlude the liquid, but the liquid only enters the pores, and the liquid is not exposed to the outside. The function for preventing leakage (the bellows function) is sufficient. Such a liquid occlusion member 30 satisfies a sufficiently high level of liquid discharge performance from the tip member 40, prevention of drying of the tip member (inhibition of drying), and prevention of leakage of the liquid to the outside. It will be different. The intermediate chamber 20 communicates with the atmosphere through, for example, a breathing hole 3b formed in the tip casing 3, and the intermediate chamber 20 communicates with the liquid storage chamber 10 and the air through the liquid storage member 30 (the pores). Exchanged.

  4 and 5 show a second embodiment of the present invention. The same reference numerals are given to the same components as those in the above-described embodiment, and a duplicate description thereof will be omitted (this will be described below) The same applies to other embodiments). In this embodiment, the tip member 40B (corresponding to the tip member 40 in the above embodiment) and the liquid guide member 50B (corresponding to the liquid guide member 40 in the above embodiment) are formed as separate bodies and are fitted. They are connected to each other. Note that the tip member 40B in this embodiment is a nib of a brush pen.

  In particular, as is apparent from FIG. 5, an insertion hole 30 c into which the liquid guiding member 50 is inserted is formed in the liquid storage member 30 in advance. In this case, the inner diameter of the insertion hole 30c is preferably slightly smaller than the outer diameter of the liquid guide member 50 in order to ensure sufficient adhesion between the liquid storage member 30 and the liquid guide member 50. . Further, by making the insertion hole 30c into a bottomed shape with the rear end side closed, it is possible to confirm the insertion depth of the liquid guide member 50 at the time of assembling work, or to inadvertently place the liquid guide member 50 on the liquid storage chamber 10 side. Is preferable (so that the rear portion 30a of the liquid storage member 30 is surely positioned between the liquid guide member 50 and the liquid storage chamber 10).

  FIG. 6 shows a third embodiment of the present invention. In the present embodiment, the lid member 2 is fixed to the main body casing 1 with a screw so as to be detachable so that the rear end portion of the liquid storage chamber 10 can be opened to the outside. Further, an annular fitting attachment portion 13 that protrudes toward the inside of the liquid storage chamber 10 is formed at the peripheral edge portion of the communication port 12. The cartridge 60 (ink cartridge) is fitted and fixed to the fitting attachment portion 13. In the present embodiment, when the liquid in the cartridge 60 is consumed, the cartridge 60 is replaced with a new cartridge 60. The cartridge 60 and the main body casing 1 positioned around the cartridge 60 are transparent or translucent so that the amount of liquid inside can be easily confirmed from the outside.

  FIG. 7 shows a fourth embodiment of the present invention. In the present embodiment, the liquid storage chamber 10 is configured by the cartridge 60 inserted into the casing K, which is the same as in the case of FIG. However, in this embodiment, the opening of the cartridge 60 is covered with the liquid storage member 30. That is, an annular ring member 70 is press-fitted into and integrated with an opening 60 a opened on the tip member 40 side of the cartridge 60, and a substantial opening edge of the cartridge 60 is configured by the ring member 70. I have to do it. The rear portion 30a of the liquid occluding member 30 is inserted into the ring member 70 in a compressed state (the ring member 70 substantially replaces the rear chamber portion 20a formed as the small diameter portion of the intermediate chamber 20). Is configured). Of course, the front portion 30b of the liquid storage member 30 is in an uncompressed state. The ring member 70 is restricted from being inserted into the cartridge 60 more than a predetermined depth by the flange portion 70 a coming into contact with the opening end surface of the cartridge 60.

  Moreover, in this embodiment, the integrally molded product of the front end member 40 and the liquid guide member 50 is a rod having the same diameter over the entire length except that the front end and the rear end are tapered. Has been. A cylindrical tube member 75 is disposed on the outer periphery of the integrally formed product of the tip member 40 and the liquid guide member 50. The rear end of the cylindrical member 75 is positioned so as to contact the front end face of the liquid storage member 30, and the front end protrudes from the front end of the front end casing 3 and covers the periphery of the base end portion of the front end member 40. . In the present embodiment, an insertion hole (corresponding to the insertion hole 30c in FIG. 5) into which the liquid guiding member 50 is inserted is formed in the liquid storage member material 30, and the tip member 40 and the liquid guiding member 50 are After the assembly of the casing K, the integrally molded product can be inserted into the casing K through the tip opening 3a of the tip casing 3 (the rear end portion of the liquid guide member 50 is inserted into the liquid storage member 30). Yes. The cartridge 60 and the main body casing 1 positioned around the cartridge 60 are transparent or translucent so that the amount of liquid inside can be easily confirmed from the outside.

  When assembling the direct liquid writing instrument as shown in FIG. 7, for example, the cartridge 60, the ring member 70, and the liquid occlusion member 30 are assembled in advance, and this assembly is inserted into the main body casing 1, and then the tip casing. 3 can be attached to the main casing 1. In addition, a restricting protrusion that protrudes radially inward with a gap in the radial direction is provided at the rear end of the ring member 70 so that the liquid storage member 30 does not move toward the liquid storage chamber 10 more than a predetermined amount. You may make it form. Alternatively, the ring member 70 may be set not to be provided separately, and the opening of the cartridge 30 may be directly closed by the liquid storage member 30 (in this case, the outer diameter of the liquid storage member 30 in the free state is set to the cartridge 60). Should be larger than the inner diameter).

  8 and 9 show a fifth embodiment of the present invention and show a preferable setting example of the liquid storage member 30. FIG. That is, the liquid occlusion member 30 in this embodiment is such that the insertion hole 30c into which the rear end portion of the liquid guiding member 50 is inserted extends over the entire length in the free state, that is, the insertion hole 30c is the liquid occlusion member. 30 is formed to penetrate through. This is preferable for easily forming the liquid storage member 30 having the insertion hole 30c. When the rear portion 30a of the liquid storage member 30 is reduced in diameter and compressed, the insertion hole 30c of the compressed portion is crushed so that the insertion hole 30c does not substantially exist in the rear portion 30a. Has been.

  The rear end portion of the liquid guide member 50 inserted into the insertion hole 30c is positioned at the compressed rear portion 30a. That is, in the state where the liquid guide member 50 is inserted, the insertion hole 30c is in a state where the rear portion of the liquid guide member 50, that is, the liquid storage chamber 10 side portion is crushed, while the liquid guide located in the rear portion 30a. The member 50 is sufficiently brought into close contact with the rear portion 30a under the compression action.

  Although the embodiment has been described above, the present invention is not limited to the embodiment, and can be appropriately changed within the scope described in the scope of claims. For example, the invention includes the following cases. . The direct liquid instrument in the present invention is not limited to a writing instrument, and can be applied to an appropriate instrument. For example, a direct liquid cosmetic tool (a liquid storage chamber 10 filled with a cosmetic liquid), a direct liquid cleaning tool (a liquid storage chamber 10 filled with a cleaning liquid, for example, a fiber optic connector) Cleaning), direct liquid disinfection tool (with liquid storage chamber 10 filled with liquid for disinfection), direct liquid chemical liquid tool (with liquid storage chamber 10 filled with chemical liquid), direct liquid coating The present invention can be applied to an appropriate type that supplies the liquid in the liquid storage chamber to the tip member by utilizing capillary action, such as a tool (a liquid storage chamber 10 filled with a coating liquid for repair). The intermediate chamber 20 can be set to an appropriate shape and size as long as the liquid storage member 30 can be accommodated.

  The liquid occlusion member 30 is not limited to the above-described rod-shaped fiber bundle, and for example, a felt resin processed body, a felt needle punch processed body, an open cell body of synthetic resin, or the like can be used as appropriate. Further, the liquid guide member 50 may be any member provided with a liquid lead-out path in the axial direction. For example, a fiber bundle resin processed body, a fiber bundle heat-bonded processed body, and a composite having an axial liquid guide path. Appropriate ones such as resin extrusion moldings and injection moldings can be used. As the tip member 40, any suitable one can be used as long as it can discharge liquid (ink) onto the paper surface. For example, a fiber bundle resin processed body, a fiber bundle heat fusion processed body, and a felt processed body. An appropriate material such as an open-cell body of synthetic resin, an extruded molded body of synthetic resin, a ball-point pen chip, a fountain pen-type plate-shaped nib, and a thin tubular pen body can be used. Of course, the object of the present invention is not limited to what is explicitly stated, but also implicitly includes providing what is substantially preferred or expressed as an advantage. It can also be grasped as a manufacturing method (assembly method).

Sectional drawing which shows embodiment at the time of applying this invention to a direct liquid type writing instrument. FIG. 2 is an exploded cross-sectional view of the direct liquid writing instrument shown in FIG. 1. The figure which shows the example of a setting of the preferable internal diameter of a communicating port. Sectional drawing which shows the principal part which shows the 2nd Embodiment of this invention. Sectional drawing which shows the liquid storage member shown in FIG. Sectional drawing which shows the principal part which shows the 3rd Embodiment of this invention. The principal part sectional view showing the 4th embodiment of the present invention. Sectional drawing which shows the principal part which shows the 5th Embodiment of this invention. The principal part sectional drawing which shows the state by which the rear side part was compressed from the state of FIG.

Explanation of symbols

K: casing 1: main body casing 2: lid member 3: tip casing 5: cap 10: liquid storage chamber 11: partition wall 12: communication port 20: intermediate chamber 20a: rear chamber portion 20b front chamber portion 20c: taper surface 30: liquid Occlusion member 30a: rear part 30b: front part 30c: insertion hole 40: tip member 50: liquid guide member 40B: tip member 50B: liquid guide member 60: cartridge

Claims (8)

A direct liquid type instrument configured to supply the liquid in the liquid storage chamber to the tip member by capillary action,
In the casing in which the liquid storage chamber is configured, a liquid storage member having a capillary phenomenon is disposed on the tip member side of the liquid storage chamber,
The liquid storage member closes the opening on the tip member side of the liquid storage chamber with a rear portion on the liquid storage chamber side,
The liquid occluding member has the rear portion in a compressed state, and the density of the rear portion is higher than the density of the front portion on the tip member side,
The tip member and the liquid storage member are connected by a liquid guide member having a capillary action,
The liquid guide member is located in the rear portion of the liquid storage member, but is not exposed to the liquid storage chamber.
A direct liquid device characterized by that. In claim 1,
In the casing, an intermediate chamber is formed which is in communication with the liquid storage chamber and disposed with the liquid storage member on the tip member side of the liquid storage chamber.
The rear chamber portion on the liquid storage chamber side of the intermediate chamber is a small diameter portion that is reduced in diameter relative to the front chamber portion on the tip member side,
The liquid occlusion member has a higher density than the front portion located on the tip member side than the small diameter portion by compressing the rear portion located on the small diameter portion.
A direct liquid device characterized by that. In claim 1 or claim 2,
The liquid storage member is configured as a rod-like fiber bundle having pores continuous in the longitudinal direction with hydrophobic fibers,
The porosity of the rod-shaped fiber bundle is 75 to 90% in a free state before being inserted into the intermediate chamber,
The porosity of the rear end portion inserted into the small-diameter portion of the rod-like fiber bundle and brought into a compressed state is reduced by 5 to 15% compared to the porosity in the free state,
A direct liquid device characterized by that. In any one of Claims 1 thru | or 3,
The liquid storage chamber is configured by a bottomed cylindrical cartridge that is disposed in the casing and has an opening on the tip member side,
The opening of the cartridge is covered by the rear portion of the liquid storage member.
A direct liquid device characterized by that. In any one of Claims 1 thru | or 4,
The direct liquid instrument characterized by the outer peripheral surface of the said front side part being spaced apart from the inner peripheral surface of the said casing among the said liquid storage members. In claim 2,
A partition that separates the liquid storage chamber and the intermediate chamber is formed in the casing,
The partition is formed with a communication port that communicates the liquid storage chamber and the intermediate chamber,
The liquid in the liquid storage chamber is supplied to the rear portion located in the small diameter portion of the liquid storage member through the communication port.
A direct liquid device characterized by that. In any one of Claims 1 thru | or 6,
The tip member is formed by a member having capillary action;
The liquid guide member is integrally formed with the tip member;
A direct liquid device characterized by that. In any one of Claims 1 thru | or 7,
A direct liquid type instrument, wherein the liquid is ink, the tip member is set for a writing instrument, and the casing is elongated so that the casing can be gripped with fingers.

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