JP3753441B2 - Inner cap with excellent condensation resistance - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to an inner cap having excellent condensation resistance, and more particularly to an improvement of an inner cap having excellent condensation resistance that is mainly mounted inside a cap portion of a water-based writing instrument.
[0002]
[Prior art]
In recent years, the types and applications of various writing instruments have diversified, and at present, development and improvement efforts are always made to appeal to users by providing unique products. is there.
As such means, various examinations are conducted from the function of the writing instrument itself to the design aspect such as shape and color to naming and further publicity means.
[0003]
One such writing instrument is a so-called water-based sign pen. However, in such writing instruments, due to the effects of winter and summer or rainy season, cold and warm areas, and air conditioning including widely used households in recent years. Condensation may occur in the cap due to the difference between the temperature and humidity of the outer peripheral atmosphere of the writing instrument and the atmosphere in the cap of the writing instrument.
[0004]
This will be described below with reference to the drawings. FIG. 4 is a cross-sectional view showing an example of a cap used in a conventional writing instrument, in which (a) is a front cross-sectional view of a part of the upper half and the lower half (b) is a 90 ° rotation of (a). It is sectional drawing of a side surface.
In these drawings, reference numeral 101 denotes a cap body, and a clip 102 is attached by any means such as embedding. Reference numeral 103 denotes an inner cap provided inside the cap 101. The inner cap 103 includes a nib chamber 104 for protecting and accommodating a nib portion (not shown). Further, the inner cap 103 is closed at its tip by a partition plate 107, and is provided with a locking portion 106 that is fitted by a step provided on the outer surface near the base and the inner surface of the cap 101, respectively.
[0005]
Further, a plurality of projections 108 are provided in the vicinity of the opening of the cap 101. When a writing instrument pen tip portion (not shown) is inserted into the cap 101, the side surface of the writing instrument shaft portion presses these projections 108, whereby the shaft The portion is gripped by the protrusion 108, so that the cap 101 is fixed and is prevented from falling off. In the embodiment of FIG. 4, an oblong window 109 is opened in the cap 101, and the inner pen tip can be viewed with the cap 101 closed by forming the inner cap 103 with a transparent resin. It becomes possible. Reference numeral 105 denotes a crown, and reference numeral 110 denotes a decorative ornament.
[0006]
[Problems to be solved by the invention]
Since the conventional writing instrument with an inner cap is configured as described above, the moisture contained in the atmosphere in the nib chamber 104 that houses the nib part of the inner cap 103 in FIG. Condensation may occur on the inner wall of the inner cap 103 in accordance with the environment of the outside air, particularly with a change in temperature. In such a case, especially in the case of an aqueous writing instrument, dirt may be generated in the inner cap 103 due to the influence of moisture due to dew condensation. Inconveniences such as contamination occur.
[0007]
Furthermore, in the aspect having the window 109 as illustrated in FIG. 4, when condensation occurs, the inner wall of the transparent inner cap 103 becomes cloudy, making it difficult to see through the pen nib chamber 104.
Therefore, in this type of conventional writing instrument, as a measure for preventing condensation, for example, by keeping the volume of the nib chamber 104 as small as possible, the amount of air, that is, moisture contained inside is kept as low as possible, or the inner Means have been used such that the heat insulation effect from the outside air is expected by increasing the thickness of the cap 103.
[0008]
However, in order to keep the volume of the nib chamber 104 small, it is necessary to consider in manufacturing, such as paying special attention to the clearance accuracy between the nib and the inner cap 103, and the manufacturing process becomes complicated. There is a fear. On the other hand, as for the means for increasing the thickness of the inner cap 103, the heat insulating effect cannot be exerted so much as the amount of the resin used increases.
Accordingly, an object of the present invention is to provide an inner cap having excellent dew condensation resistance by simple improvement for a writing instrument using the inner cap.
[0009]
[Means for Solving the Problems]
SUMMARY OF THE INVENTION The present invention has been made to solve the subject, and the first of the gist thereof is that the inner cap portion of the writing instrument includes an inner cap outer tube that forms the outer wall and an inner cap inner tube that forms the inner wall. The base portion of the outer wall and the inner wall is integral, and a two-layer tube structure is formed in the distal direction from the base portion , and the air for heat insulation is formed between the outer wall and the inner wall of the inner cap forming the two-layer tube structure. The outer surface of the outer wall portion is fitted with the inner surface of the cap body at least in the vicinity of the tip of the inner wall, and the inner cap inner tube is closed at the tip of the inner cap by a partition plate to accommodate the pen tip. This is an inner cap with excellent dew condensation resistance.
[0010]
The second of the gist is that the inner cap portion of the writing instrument includes an inner cap outer tube that forms the outer wall and an inner cap inner tube that forms the inner wall, and the base portion of the outer wall and the inner wall is integral, A two-layer tube structure is formed in the distal direction from the base portion, and an air layer for heat insulation is formed between the outer wall and the inner wall of the inner cap forming the two-layer tube structure, and the outer surface of the outer wall portion is at least its outer surface. tip is fitted with the cap body inner surface in the vicinity, while the inner cap tube is a inner cap of the pen tip chamber is formed in which the tip is closed by the partition plate to accommodate the nib, the inner cap耐結which together are formed of a resin having transparency, further outer wall portion side acts as a transparent window partially exposed from an opening provided in the cap body side It is in excellent inner cap to sex.
[0011]
[Action]
In the present invention, the inner cap portion of the writing instrument is formed in a two-layer tube structure composed of an outer wall and an inner wall, and an air layer having a heat insulating effect is provided between the outer wall and the inner wall. Since the heat insulating effect is higher than that of the inner cap, the condensation resistance is also excellent, and the thickness of the resin layers on the outer wall and the inner wall can be reduced.
Furthermore, when the inner cap is configured as a transparent window partially exposed from the opening, the condensation resistance is improved, so that the internal fog does not occur and the pen tip can be easily monitored. In any case, along with the improvement of air tightness inside the nib interior, it is expected to suppress ink volatilization, and by improving the condensation resistance, it becomes possible to prevent stains near the tip of the writing instrument, Contribute to improving product image.
[0012]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a cross-sectional view showing an embodiment of a cap used for a writing instrument as an object of the present invention, where (a) is a front cross-sectional view thereof, and (b) is a detail of part A in (a). FIG.
In these drawings, reference numeral 1 denotes a cap body, and a clip 2 is attached by any means such as embedding. Here, one of the important points of the present invention is that the inner cap portion provided inside the cap 1 has a two-layered tube structure composed of the outer wall 3a and the inner wall 3b, and these outer wall 3a and inner wall 3b. The air layer 11 forms a heat insulating layer in the middle.
[0013]
Further, as seen in FIGS. 1 (a) and 1 (b), the inner cap inner tube 3b forming the inner cap inner wall 3b is integrated with the base portion 12 of the inner cap outer wall 3a and the inner wall 3b. Is closed by the partition plate 7, thereby forming a nib chamber 4 for protecting and accommodating the nib portion of the writing instrument as will be described later.
Further, the inner cap outer tube forming the inner cap outer wall 3a is provided on the outer surface and the inner surface of the cap body 1 at least in the vicinity of the tip as shown in the enlarged view of the A part in FIG. An engaging portion 13 that is fitted by the stepped portion is provided. On the other hand, also in the vicinity of the inner cap outer tube base, there is provided a locking portion 6 that is fitted by a step portion provided on each of the outer surface and the inner surface of the cap body 1 as in the conventional mode.
[0014]
The other configuration in FIG. 1 is the same as that of the conventional writing instrument described above, 5 is a crown, and a plurality of protrusions 8 are provided in the vicinity of the opening of the cap body 1. When a writing instrument pen tip, which will be described later, is inserted into the cap body 1, the side surface of the writing instrument presses the projections 8 so that the shaft is gripped by the projections 8, thereby fixing the cap body 1 fixed. This prevents the dropout.
[0015]
Next, the operation of the embodiment of the present invention shown in FIG. 1 will be described with reference to the drawings.
As described above, the important point of the present invention is that the inner cap has the air layer 11 for heat insulation with the inner wall 3b and the outer wall 3a separated from each other. In this case, in the present invention, the tip of the inner tube portion constituting the inner wall 3b is partitioned by the partition plate 7, while the inner cap outer wall 3a and the cap body 1 are at least near the tip of the inner cap outer wall 3a. Since it is configured to be fitted by the locking portion 13, after the pen tip described later is inserted and fixed in the cap main body 1, the inside of the pen tip chamber 4 is shut off from the outside air and becomes airtight. Since No. 11 has a better heat insulating effect than the case of using a conventional thick resin inner cap, it is possible to significantly improve the dew resistance. Furthermore, as a material for the inner wall 3b and the outer wall 3a, a thin material can be used.
[0016]
Next, another embodiment of the present invention will be described with reference to FIG.
FIG. 2 is a cross-sectional view showing another embodiment of the cap used in the writing instrument which is the subject of the present invention, wherein (a) is a front cross-sectional view of a part of the upper half and the lower half, and (b). FIG. 4 is a cross-sectional view of the 90 ° rotating side surface of (a).
In these drawings, the same components as those in the embodiment shown in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.
2 (a) and 2 (b), 1 is a cap body, 2 is a clip, 3a is an outer wall of the inner cap, 3b is the same inner wall, 4 is a nib chamber, 5 is a crown, and 6 and 13 are latched. Reference numeral 7 denotes a partition plate, 8 denotes a protrusion, 11 denotes an air layer, and 12 denotes a base, and the configuration and operation thereof are basically the same as those in FIG. Note that reference numeral 10 denotes a decorative ornament that is also shown in the conventional embodiment.
[0017]
By the way, in the embodiment of FIG. 2, the inner cap portion outer wall 3a and the inner wall 3b are made of a resin having transparency, thereby forming the inner cap portion. 9 is opened, and the inner cap part outer wall 3a and the inner wall 3b are transparent, so that a part of the inner cap part is exposed as a transparent window, and the inside of the nib chamber 4 can be seen through. Accordingly, when a pen tip portion described later is inserted into the cap body 1, it is possible to confirm the pen tip portion. In addition, in the present invention, the condensation resistance is improved, so that the inner surface of the nib chamber 4 can be prevented from being fogged. As a result, the nib portion of the nib portion associated with the provision of the window 9 can be prevented. The fluoroscopic effect is sufficiently exhibited.
[0018]
Finally, an example of a writing instrument using an inner cap according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 3 is a partial front sectional view showing the above-described embodiment example. FIG. 3A is an example using the inner cap of the embodiment of FIG. 1, and FIG. 3B is an example of using the inner cap of the embodiment of FIG. It is shown. 3 (a) and 3 (b) each show a writing instrument with a cap attached, where 15 indicates a shaft portion of the writing instrument, 14 indicates a pen tip portion, and 16 indicates a tail plug. The other components are described in detail with reference to FIG. 1 and FIG. 2 and will not be described. However, in any aspect, the pen tip is improved with the improvement of the airtightness inside the pen tip chamber 4. The volatilization suppression effect of the water-based ink from 14 is also improved. Further, as described above, with the air layer 11, the inner wall 3b and the outer wall 3a can be made of a thin material.
FIG. 3B shows that the pen tip 14 can be seen through the window 9.
[0019]
【The invention's effect】
As is clear from the above embodiments, according to the present invention, by a simple improvement, the air tightness in the nib chamber is improved and the heat insulating effect by the air layer provided between the two-layer pipe structures of the inner cap, It prevents condensation inside the nib chamber due to changes in the temperature of the outside air, and also enables ink volatilization to be suppressed, as well as preventing contamination near the tip of the writing instrument shaft. When the main body has a window, it is possible to see through the nib inside the nib interior without fogging the inner surface of the window, and the effect of the inner cap according to the present invention cannot be measured. There is.
[Brief description of the drawings]
FIG. 1A is a front sectional view showing an embodiment of a cap used in a writing instrument as an object of the present invention, and FIG. 1B is an enlarged sectional view showing details of a portion A in FIG. .
2 (a) is a front sectional view of a part of the upper half and the lower half, and FIG. 2 (b) is a front sectional view of the cap used in the writing instrument that is the subject of the present invention. It is sectional drawing of a 90 degree rotation side surface.
3A shows a writing instrument using an inner cap according to an embodiment of the present invention, FIG. 3A is a partial front sectional view when the embodiment of FIG. 1 is used, and FIG. 3B uses the embodiment of FIG. It is a partial front sectional view in the case.
4A shows an example of a cap used in a conventional writing instrument. FIG. 4A is a front sectional view of a part of an upper half and a lower half, and FIG. 4B is a sectional view of a 90 ° rotation side surface of FIG. It is.
[Explanation of symbols]
1,101 Cap (cap body)
2,102 Clip 3a Inner cap outer wall 3b Inner cap inner wall 4,104 Pen tip chamber 5,105 Crown 6,6,106 Locking portion 7,107 Partition plate 8,108 Projection 9,109 Window portion 10,110 Child 11 Air layer 12 Base 14 Nib 15 Shaft 16 Tail plug 103 Inner cap

Claims (2)

An inner cap portion of a writing instrument includes an inner cap outer tube that forms an outer wall and an inner cap inner tube that forms an inner wall, and the inner cap inner tube is closed by a partition plate to accommodate a pen tip. Two layers in which a nib chamber is formed and the base portion of the outer wall and the inner wall is integrated, and an air layer for heat insulation is formed between the inner cap outer tube and the inner cap inner tube in the distal direction from the base portion in to the inner cap, such a tubular structure,
The outer surface of the inner wall of the inner cap is fitted to the inner surface of the cap body at least in the vicinity of the tip,
In a state in which the writing instrument shaft is mounted on the inner cap, the base is located on the side of the tip portion that holds the pen tip of the shaft portion, and the air layer holds the pen tip of the shaft portion. An inner cap with excellent dew condensation resistance, which is constructed from the side of the tip to the tip of the inner cap. An inner cap portion of a writing instrument includes an inner cap outer tube that forms an outer wall and an inner cap inner tube that forms an inner wall, and the inner cap inner tube is closed by a partition plate to accommodate a pen tip. Two layers in which a nib chamber is formed and the base portion of the outer wall and the inner wall is integrated, and an air layer for heat insulation is formed between the inner cap outer tube and the inner cap inner tube in the distal direction from the base portion It has a tube structure, and the inner cap portion is formed of a transparent resin, and further, the outer wall side surface is partially exposed from an opening provided on the cap main body side surface and acts as a transparent window. In the inner cap,
The outer surface of the inner wall of the inner cap is fitted to the inner surface of the cap body at least in the vicinity of the tip,
In a state in which the writing instrument shaft is mounted on the inner cap, the base is located on the side of the tip portion that holds the pen tip of the shaft portion, and the air layer holds the pen tip of the shaft portion. An inner cap with excellent dew condensation resistance, which is constructed from the side of the tip to the tip of the inner cap.

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