JPH11221992A - Direct liquid type writing material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To set up a constitution in which the inflow of ink into an ink introduction slit of an ink-air replacing member is not disturbed by a crosssectional area. SOLUTION: An ink storage section is formed of comb teeth 9 arranged side by side at proper intervals, and an ink introduction slit 7 is formed in parallel with an axial line, and an ink introduction refill is inserted into the center of an ink and air replacing member 3 provided with air flow channels on the position symmetrical to the ink introduction slit 7, and a pen refill 10 is inserted into its end. The ink and air replacing member 3 is inserted into the end of a main body container 1 with its one end open and its rear section formed as an ink chamber 2, and the rear end of the ink and air replacing member 3 is brought into contact with a step 8 formed on the inner wall of the main body container 1 and fixed thereon, and a holder is fitted on the open end of the main body container 1 in a direct liquid type writing instrument. The rear end of the ink and air replacing member 3 is brought into contact with the step 8 formed on the inner wall of the main body container 1, and a section on which the ink introduction slit 7 is formed is provided as a non- contact section 12 on the step 8 in the direct liquid type writing instrument.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method of injecting a liquid ink into an ink chamber of a main body container, inserting an ink air exchange member at an opening end of the main body container, and inserting a pen core into a tip of the ink air exchange member. The present invention relates to a writing instrument such as a fountain pen, a marker, a sipen, a water-based ball and the like which is fitted with a direct liquid type writing instrument.

[0002]

2. Description of the Related Art Conventionally, such a direct liquid type writing instrument has two kinds of methods for inserting, providing, and fixing an ink air exchange member inside a main body container. A concave groove is provided circumferentially, and a convex portion is provided on the inner wall surface of the main body container, and the ink air exchange member is fixed by fitting the concave and convex. Another type is a method in which the rear end of the ink air exchange member abuts on a step provided on the inner wall surface of the main body container and is fixed.
As the former method, the prior application of the fixing method of the ink air exchange member is disclosed in Japanese Utility Model Laid-Open No. 61-45191 (hereinafter referred to as (A)) and Japanese Utility Model Application Laid-Open No. 5-93873 (hereinafter referred to as (B)). And Japanese Utility Model Laid-Open No. 5-58359 (hereinafter referred to as (c)). (A) is fixed by fitting in concave and convex at the leading end, and (B) and (C) are not clear from the specification, but are fitted with concave and convex in the leading or trailing end from the figure. I have. Therefore, (a), (b), (c)
Is different from the fixing method of the present application. Further, such a fixing method requires a high dimensional accuracy, and therefore increases the cost.

The latter method is disclosed in Japanese Utility Model Laid-Open No. 5-6388.
No. 5 (hereinafter referred to as (d)), Heikai 6-12083
(Hereinafter referred to as (e)) and Japanese Patent Application Laid-Open No. 9-11681 (hereinafter referred to as (f)). In (2), a flange or a step is provided inside the shaft cylinder, the ink adjusting member 4 is brought into contact with the ink adjusting member 4, and is held and positioned. Therefore, since the ink introduction groove provided in the ink adjusting member is in contact with the flange or the step, the ink introduction groove is obstructed by the flange or the step, and does not act on the axis of the ink introduction groove by the cross-sectional area. become. Therefore, it hinders the introduction of ink into the ink adjusting member. (E) is held by the rib and the side surface of the main body container, and there is a description that such a configuration is employed because the original ink guiding function of the rib cannot be sufficiently utilized due to a problem of ink flow. However, the obstacle of the ink guided by the ink guide slit has not been solved. Because the ink adjusting member holds the rib in contact with the rib, the probability that the rib contacts the ink guide slit is sufficiently high. Therefore, the position of the rib and the position of the ink guiding slit must not be matched.

In such a case, the ink is prevented from being guided to the ink guide slit. Since the slit cross-sectional area is originally extremely small, it is important to secure the ink guide slit without any trouble in order to maintain the original performance of the ink guide member. (F), the main body has two stages, and the ink occluding body is in contact with the main body. The effect is to eliminate the ink that causes the pen body to exceed the saturated state and to prevent the pen body from stagnation. However, in spite of the two-stage structure, the ink guide groove is always in contact with the step portion provided on the inner wall of the main body container, so that the cross-sectional area of the ink guide groove is considerably reduced. Therefore, the fluidity of the ink to the ink guide member is deteriorated.

[0005]

As described above, in the prior art, when the ink adjusting member (ink air exchange member) abuts and locks on the inner wall portion of the main body at the step portion, the ink introduction slit (ink guide groove). Alternatively, the ink introduction groove) may be slightly closed. When the ink is closed, the flow of ink into the ink introduction slit is different from the original flow rate of the ink air exchange member. Therefore, an ink air exchange member having the function of the original ink introduction slit is desired.

Accordingly, the present invention is intended to prevent the flow rate of the ink to the ink introduction slit by the cross-sectional area even if a step is provided on the inner wall of the main body container and the ink adjusting member (ink air exchange member) abuts. The present invention provides a direct liquid writing instrument having an ink adjusting section (ink air exchange member). Also,
Further, the present invention provides an ink air exchange member which is easy to mold and easy to assemble.

[0007]

Means for Solving the Problems Comb teeth are provided at appropriate intervals to form an ink retaining section, an ink introduction slit is provided in parallel with the axis, and an air circulation groove is provided at a symmetrical position of the ink introduction slit. A main body container in which an ink introduction core is inserted at the center of the provided ink air exchange member, and a pen core is inserted at the tip, and the ink air exchange member has one open end and the rear portion has an ink chamber. Insert at the end of the
In a direct liquid type writing instrument in which a rear end of the ink air exchange member abuts and is fixed to a step provided on an inner wall of the main body container and a holder is fitted to an open end of the main body container, the rear end of the ink air exchange member is A direct liquid writing implement, characterized in that the end is brought into contact with a step provided on the inner wall of the main body container, and the part provided with the ink introduction slit is made as a non-contact part with the step, It is a direct liquid type writing instrument characterized in that the part provided with the slit is provided one step as a non-contact part on the step part, or a rib is provided on the rear end face of the ink air exchange member in parallel with the ink introduction slit It is a direct liquid writing instrument characterized by being used.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS.
This will be described in detail with reference to FIG. Reference numeral 1 denotes a main body container which has a cylindrical shape having one closed end and the other open end, and has an ink chamber 2 for storing liquid ink inside. A step 8 for holding the ink air exchange member 3 in contact with the inside of the main body container 1 is provided. Reference numeral 3 denotes an ink air exchange member, which has a large number of comb teeth 4 at a certain interval, and a space between the comb teeth 4 and the comb teeth 4 is provided as an ink storage section 5. The ink air exchange member 3 is provided with an air groove 6 and an ink introduction slit 7 at opposing positions. The ink introduction slit 7 penetrates the ink air exchange member 3 with respect to the axis except for the comb teeth 4 at the tip, and the rear end of the ink introduction slit 7 communicates with the ink chamber 2. The width of the ink introduction slit 7 is a width of 0.05 to 0.5 mm, preferably,
A width of 0.1 to 0.4 mm is good. The air grooves 6 are provided in all the comb teeth 4, and the ink and the air are exchanged by the ink introduction slit 7, the air grooves 6, and the ink storage unit 5 including the comb teeth 4 and the comb teeth 4.

The ink air exchange member 3 includes a main container 1.
Is inserted into the tip opening. A relay core 9 is inserted and fixed at the center of the ink air exchange member 3, and a pen core 10 is attached to a tip of the ink air exchange member 3. Then, the pen lead holder 11 is fitted and fixed to the main body container 1 at the forward end thereof beyond the tip of the ink air exchange member 3. Here, the portion where the ink guide slit 7 at the rear end of the ink air exchange member 3 is provided is a non-contact portion 12, so that the ink guide slit 7 does not contact the step portion 8.

Therefore, the flow of the ink is guided from the ink chamber 2 to the ink introduction slit 7. At this time, the rear end and the cross-sectional area of the ink introduction slit 7 are the same as the cross-sectional area before the assembly, and the ink introduction slit 7 can exhibit the original performance. In the present embodiment, the non-contact portion 12
Has a semicircular portion cut out. However, as shown in FIG. 4, the non-contact portion 12 may be a groove having a width slightly wider than the ink introduction slit 7. (FIG. 4 is a second embodiment)

The flow of the ink will be described briefly. The ink tends to flow to both the rear end of the relay core 9 and the ink introduction slit 7. However, since the air is not exchanged with the ink, no ink flows to the relay core 9. First, the ink flows from the ink introduction slit 7 to the ink storing section 5, where the air and the ink are exchanged. The relay core 9 can flow the ink and can transmit the ink to the pen core 10. In the assembled state of the present embodiment, the relay core 9 is inserted and fixed at the center of the ink air exchange member 3, and the pen core 10 is press-fitted and fixed to the tip of the ink air exchange member 3.

Further, the pen core holder 11 is press-fitted and fixed to the tip of the ink air exchange member 3 from the pen core 10 side. The ink air exchange member 3, the relay core 9, the pen core 10, and the pen core holder 11 are inserted into the opening end of the main body container 1 in a state where they are assembled. Then, the rear end of the ink air exchange member 3 and the step 8 come into contact with each other, and the front end surface of the ink air exchange member 3 and the circumferential projection provided on the inner wall of the main body container 1 cause the ink air exchange member 3 to move. Are fixed, and furthermore, the pen lead holder 11 and the opening end of the main body container 1 are fitted in an uneven manner.

A third embodiment of the present invention will be described in more detail with reference to FIG. Two ribs 13 are provided at the rear end of the ink air exchange member 3 so as to face each other, and are further provided in parallel with the ink introduction slit 7. The rib 13 is
Since the ink introduction slit 7 and the step 8 are not in contact with each other and are fixed to the step 8 provided inside the main body container 1, the ink introduction slit 7 is guided to the ink introduction slit 7 from the ink chamber 2. At this time, the rear end and the cross-sectional area of the ink introduction slit 7 are the same as the cross-sectional area before assembly, and the ink introduction slit 7 can exhibit the original performance.

[0014]

With the above construction, the original (as designed) function of the ink air exchange member 3 can be achieved without obstructing the flow of ink into the ink introduction slit 7 of the ink air exchange member 3 at any position. Becomes possible. In addition, it is easy to mold the ink air exchange member 3 and the entire assembly is also simple.

[0015]

[Brief description of the drawings]

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

FIG. 2 is an enlarged schematic half sectional view of the first embodiment of the present invention.

FIG. 3 is a perspective view of an ink air exchange member according to the first embodiment of the present invention.

FIG. 4 is a perspective view of an ink air exchange member according to a second embodiment of the present invention.

FIG. 5 is an enlarged sectional view of the ink air exchange member according to the first embodiment of the present invention.

FIG. 6 is a perspective view of an ink air exchange member according to a third embodiment of the present invention.

[Explanation of symbols]

 1: Main body container 2: Ink chamber 3: Ink air exchange member 4: Comb teeth 5: Ink holding section 6: Air groove 7: Ink introduction slit 8: Step section 9: Relay core 10: Pen core 11: Pen core holder 12 ： No contact part 13 ： Rib

Claims (3)

[Claims] 1. An ink comprising an ink retaining portion formed by arranging comb teeth at appropriate intervals, providing an ink introduction slit parallel to an axis, and providing an air flow groove at a symmetrical position of the ink introduction slit. In the center of the air exchange member,
The ink introduction core is inserted and the pen core is inserted at the tip, and the ink air exchange member is inserted into the tip of the main body container having one open end and the rear part as the ink chamber, and the ink air exchange is performed. In a direct liquid writing instrument in which the rear end of the member abuts and is fixed to the step provided on the inner wall of the main body container and the holder is fitted to the open end of the main body container, the rear end of the ink air exchange member is the main body container A direct liquid writing instrument, wherein the portion provided with the ink introduction slit is abutted against the step portion by contacting the step portion provided on the inner wall. 2. The direct liquid writing implement according to claim 1, wherein a rear end portion of the ink air exchange member provided with the ink introduction slit is stepped down to form a stepped portion and a non-contact portion. 3. The direct liquid writing implement according to claim 1, wherein a rib is provided on a rear end surface of the ink air exchange member in parallel with the ink introduction slit.