JPH0632220Y2 - Applicator - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) A sealed cartridge is placed behind a coating solution storage body having an opening at the rear end, and the cartridge is opened to open the coating solution storage body. The present invention relates to an applicator adapted to supply a coating solution to the. Examples of the applicator include general writing tools such as fountain pens and brushes, makeup tools such as eyeliner and lip color, and liquid seasoning discharging tools.

(Prior Art) An applicator of the kind described above, that is, a coating liquid chamber that stores the coating liquid by capillary force, for example, a coating liquid occlusion body made of a fiber aggregate or a communicating porous foam. There are various known applicators in which a cartridge, which is a coating liquid chamber that stores the coating liquid regardless of the capillary force, is arranged at the rear portion. The cartridge is pre-sealed, for example, with a spherical stopper that is fixed so as to fall into the cartridge or a stopper that has a thin wall so that it can be broken. The coating liquid occlusion body is supplemented with the coating liquid, or the coating liquid is stored only in the cartridge until the start of use, so that the coating liquid is stored in the coating liquid storage body in advance. It has the advantage that it can be prevented from changing over time. Here, in opening the stopper of the cartridge, an opening is formed at the rear end of the coating liquid occlusion body, and the cartridge is moved toward the coating liquid storage body by pressing in one direction or advancing screwing. Generally, a cartridge stopper is applied to the opening portion. For example, those described in Japanese Utility Model Publication No. 46-27048,
The blade is used to break through the plug.

For quick reuse or quick start,
It is desirable that the coating liquid can be quickly supplied from the opened cartridge to the coating liquid storage body. For that purpose, it is preferable to provide an air exchange path for communicating the inside of the cartridge with the outside of the applicator, as well as the coating liquid lead-out member that absorbs the coating liquid by the capillary force. The presence of the air exchange passage allows the coating liquid outlet member to absorb the coating liquid and allows the outside air to enter the cartridge through the air exchange passage. The coating liquid can be discharged. The coating liquid outlet member is continuous with the coating liquid occlusion body, and may be a part of the coating liquid occlusion body itself as described in JP-A-62-199494.

(Problems to be solved by the invention) If the air exchange passage functions only as an air passage according to the original purpose, that is, if it does not serve as a passage for the coating liquid, special consideration is given to the air exchange passage. No need. Indeed, it is sufficient to appropriately provide a gap that extends from the outside of the applicator to the inside of the cartridge over the entire length of the air exchange path. However, basically, the coating liquid travels through the air exchange passage to the wall surface of the opening portion and becomes an entry passage. In addition, the movement of the coating liquid when opening the cartridge is not always gentle. When the cartridge is opened, the pressure in the cartridge rises as the stopper moves toward the inside of the cartridge. At this time, if the stopper is slowly opened, the opening amount that only a small amount of coating liquid will come out will start, and the opening amount will gradually increase, so that the coating liquid that is about to vigorously rise due to this increase in internal pressure Be killed. However, when the cap is vigorously opened, the pressure inside the cartridge rises rapidly, and since the opening is large in a short time, a relatively large amount of the coating solution is ejected simultaneously with the opening. That is, the coating liquid for opening the cartridge is affected by the opening speed of the cartridge, and moves gently if the opening speed is slow, but moves violently as if ejected from the cartridge if the opening speed is high. It also becomes. Then, such a movement of the coating liquid may be directed in an undesired direction. After all, the air exchange passage serves as an entrance passage for the coating liquid.

Of course, since the coating liquid outlet member exists as the original passage for the coating liquid, the amount of the coating liquid that enters the air exchange passage as described above is not large at all. However, in some cases, due to the influence of gravity, the amount may eventually leak to the outside. At this time, for example, if there is a small cross-sectional area of the air exchange passage, that is, if the cross-sectional area of the air holes is small, this cross-sectional area is small. However, since the flowing coating liquid is retained and stored by the capillary force, the coating liquid does not immediately leak to the outside due to gravity when the cartridge is opened. However, even at this small cross-sectional area, the coating liquid shuts off the air exchange path and forms a closed space connected to the inside of the cartridge. Will be received.

Even if it is unavoidable that the air exchange passage serves as an entry passage for the coating liquid, it is necessary to pay attention to prevent leakage.

(Means for Solving the Problem) The above problem can be solved by considering the air exchange passage in the opening portion. Specifically, when the cartridge is opened, even if the coating liquid enters the air exchange passage, the invading coating liquid is held and stored by the capillary force at the opening of the air exchange passage. The air exchange passage at the opening portion is a gap (capillary passage) for storing the coating liquid by the capillary force. This prevents the coating liquid from further entering the air exchange passage. However, depending on the pressure drop inside the cartridge due to the movement of the coating liquid from the coating liquid outlet member to the applicator storage member, the stored coating liquid is retracted into the cartridge, or directly to the coating liquid storage member side. In order to make it move, the capillary force as this capillary path must be made weaker than the capillary force of the application liquid drawing member. That is, according to the present invention, the sealed cartridge is arranged behind the coating liquid storage body having the opening portion at the rear end, and the coating liquid is supplied to the coating liquid storage body by opening the cartridge. The application tool provided is provided with a coating solution lead-out member that is continuous with the application solution storage body and absorbs the application solution by a capillary force, and an air exchange path that communicates the inside of the cartridge with the outside of the application tool. In the present invention, the gist is an applicator in which the air exchange passage is formed as a capillary passage that is weaker than the capillary force of the application liquid outlet member but stores the application liquid by the capillary force.

(Operation) As described above, when the cartridge is opened, even if the coating liquid enters the air exchange passage, the adhered coating liquid is held and stored at the opening of the air exchange passage, whereby the air exchange passage is held. Suppression of further application liquid into the Then, the invading coating liquid retreats into the cartridge in response to the pressure drop inside the cartridge due to the movement of the coating liquid from the coating liquid lead-out member to the applicator occlusion body. Alternatively, it moves directly to the coating liquid occlusion body side.

(Embodiment) A first embodiment will be described with reference to the attached FIGS. 1 to 6. At the tip of the shaft 4, a tip holder 3 having a pen nib 1 in which a porous foam material such as urethane is drawn and a relay core 2 made of a fiber converging body or the like for inserting the front part into the pen nib 1 is attached. It is attached. Here, an appropriate number of ribs or grooves are formed on the inner wall of the shaft 4 to which the chip holder 3 is attached, whereby an air hole 5 serving as an opening to the outside of the air exchange passage is secured (second). See figure).

The rear part of the relay core 2 extends into the coating liquid occlusion body 6 composed of a fiber aggregate or a communicating porous foam, the side wall of which is covered with a film or the like as required, and is formed on the inner wall of the shaft 4. Rib 7 (some parts are shown by dotted lines in Fig. 1)
However, an air exchange path communicating with the air holes 5 is secured while preventing the front and side displacement of the coating liquid occlusion body 6 (see FIG. 3).

An annular body 8 is arranged at the rear part of the coating liquid occlusion body 6. The ribs 7 are press-fitted into the shaft 4 so as to come into contact with the rear ends thereof, and the rear portion of the coating liquid occlusion body 6 is inserted to prevent rearward displacement. This annular body 8 has a tapered rear end portion and constitutes an opening portion in the illustrated one, and is a coating such as a communicating porous urethane which can absorb the coating liquid by a capillary force inside. It has a liquid lead-out member 9 and a groove 10 on the outer wall. The groove 10 has a sufficiently small cross-sectional area, and
The annular body 8 extends rearward before the rear end and extends slightly forward of the coating liquid lead-out member 9.

In this state, the groove 10 is not sealed by the rib 7, and
The groove 10 is a part of the introduction path of the air from the air hole 5 (see FIG. 4). The coating liquid occlusion body 6 and the coating liquid outlet member 9 are in contact with each other.

Further, a cartridge 11 is behind the annular body 8 and has a rear end protruding from the shaft 4. Since it also serves as a tail plug for the shaft 4, a pressure input is exerted between the shaft 4 and the shaft 4 and the shaft 4 can slide forward by a predetermined amount. . Further, the tip has a plug member 12 having a thin portion, and the rear portion of the annular body 8 is located on the plug member 12. The groove 10 of the annular body 8 is partially formed into a hole by the inner wall of the plug member 12 (see FIG. 5).

When the cartridge 11 is advanced with respect to the shaft 4, the tapered rear end of the annular body 8 breaks through the thin portion of the plug member 12. The internal pressure of the cartridge 11 becomes high, and the coating liquid that has begun to flow originally moves to the coating liquid outlet member 9. However, as described above, a part of the groove 10 having the hole-like shape of the annular body 8 Also invade. Since it is not allowed to freely invade and freely advance to the outside through the air exchange path, this invading coating liquid can be quickly stored. That is, the groove 1 described above
The size of 0 is such that the coating liquid can be stored from this hole-shaped portion by the capillary force. However, the magnitude of this capillary force is weaker than the capillary force of the coating liquid lead-out member 9. Therefore, the coating liquid stored in the groove 10 will eventually change in accordance with the decrease in the internal pressure of the cartridge 11 due to the movement of the coating liquid inside the cartridge 11 to the coating liquid outlet member 9 and further to the coating liquid occlusion body 6. It returns to the inside of the cartridge 11 so that the tide is drawn, and then air is allowed to enter the cartridge 11. The coating liquid returned to the inside of the cartridge 11 is applied from the coating liquid outlet member 9 to the coating liquid occlusion body 6
Move to. Reference numeral 13 is a cap, and reference numeral 14 is a stirring sphere for the coating liquid.

Next, a second embodiment will be described with reference to FIGS. 7 to 10. The same reference numerals are used for the basically same parts as in the previous example.

The difference between this example and the previous example is that the groove 1 of the annular body 8 is
0 is formed on the inner wall surface on which the coating liquid lead-out member 9 is arranged, which is also the lower surface in the drawing. It may be formed on the inner wall surface on the upper side of the drawing, but it is preferable to prioritize the movement of the coating liquid to the capillary portion 9 as much as possible. In the case of this example, the movement of the coating liquid is as follows.

When the cartridge 11 is pressed to break the thin portion of the stopper member 12 and the coating liquid is formed, a part of the coating liquid enters the groove 10 of the annular body 8 and is stored there. The groove 10 is similar to that of the previous example.
Although the coating liquid can be stored by the capillary force, it is weaker than the capillary force of the coating liquid outlet member 9. Therefore, as the air pressure enters the groove 10 due to the subsequent decrease in the internal pressure of the cartridge 11, some of the coating liquid may recede into the cartridge 11, but the coating liquid may pass through the coating liquid outlet member 9 or It moves directly to the coating liquid occlusion body 6.

Two examples have been shown above, but various others are possible. For example, although the internal pressure of the cartridge is likely to increase, a spherical plug may be used as the cartridge. Also, for example,
In the previous two cases, the cartridge was made to double as the shaft tail plug,
It doesn't have to be. A shaft with a closed rear end may be used, or a separate tail plug may be used. In addition, the pen tip,
It may be a brush bunch of bunched hair or any other suitable one, and the relay core may be appropriately integrated with the pen tip as in the case where the pen tip is made of a fiber bundle. Other integration and separation of members are also appropriate, for example, air holes are
This can be ensured by making the chip holder integral with the shaft and simply providing a through hole in the shaft, or by forming a groove or the like on the outer surface of the chip holder. The annular body can also be integrated with the front shaft by dividing the shaft into a front shaft and a rear shaft, for example. Therefore, formation of the opening portion is also appropriate. Further, in the coating liquid outlet member and the coating liquid occlusion body, the capillary force of the coating liquid outlet member is set to be weaker than the capillary force of the coating liquid occlusion body, and the extreme capillary force with the cartridge that does not substantially exert the capillary force is exerted. The smaller the difference is, the quicker the transfer of the coating liquid from the cartridge to the coating liquid storage body is. Therefore, it is preferable to separate the coating liquid as in the previous two examples, but both can be integrated. Also, the air exchange path is not a straight one, but may be, for example, a spiral one, or a plurality of air exchange paths can be appropriately formed, and imparts repellency to the coating liquid in order to facilitate escape of the stored coating liquid. You may.

(Effect of the Invention) Also in the applicator according to the present invention, the air exchange passage serves as a passage for the coating liquid from the cartridge. However, it is possible to prevent the coating liquid from leaking to the outside upon opening the cartridge and after opening the cartridge. Therefore, it is extremely convenient for promptly supplying the coating liquid stored in the cartridge to the coating liquid storage body.

[Brief description of drawings]

1 is a longitudinal sectional view for explaining the first embodiment, FIG. 2 is a lateral sectional view taken along the line AA in FIG. 1, and FIG. 3 is a sectional view taken along the line BB in FIG.
FIG. 4 is a cross-sectional view taken along the line CC of FIG. 1, and FIG.
1 is a transverse sectional view taken along the line DD of FIG. 1, FIG. 6 is a longitudinal sectional view of an essential part showing a state after pressing the cartridge from the state of FIG. 1, and FIG. 7 explains a second embodiment. 8 is a horizontal sectional view taken along line EE of FIG. 7, and FIG.
FIG. 10 is a horizontal cross-sectional view taken along the line FF of FIG. 10, and FIG. 10 is a longitudinal cross-sectional view of a main part showing a state after the cartridge is pressed from the state of FIG. 1 ... pen tip, 2 ... relay core, 3 ... chip holder,
4 ... Shaft, 5 ... Air hole, 6 ... Coating liquid occlusion body, 7 ...
Ribs, 8 ... Annular body, 9 ... Coating liquid derivation member, 10 ...
Groove, 11 ... Cartridge, 12 ... Plug member, 13 ...
Cap, 14 ... Stirring ball.

Claims (1)

[Scope of utility model registration request] 1. A capped cartridge is disposed behind a coating liquid storage body having an opening at its rear end, and the cartridge is opened to supply the coating liquid to the coating liquid storage body. The application tool provided with a coating solution outlet member that is continuous with the application solution storage body and absorbs the application solution by a capillary force, and an air exchange path that communicates the inside of the cartridge with the outside of the application tool. What is claimed is: 1. An applicator in which the air exchange passage is formed as a capillary passage that is weaker than the capillary force of the application liquid outlet member but stores the application liquid by the capillary force.