JPH0425356Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention is designed to push the pen tip, which is fitted into the front end of the barrel and protrudes from the front end, against the paper surface, etc., and retreat against the elastic force of the elastic member. This invention relates to a cap for an applicator with a knob type valve at the tip, which opens a valve that can be linked with the pen tip and supplies liquid stored in a liquid storage chamber to the pen tip.

(Prior art and its problems) The applicator with a tip knob type valve described above can supply a desired amount of liquid to the pen tip by simply retracting the pen tip without requiring any special liquid supply operation. In particular, since the valve can be used to prevent communication between the outside air and the liquid storage chamber, it can be said to be suitable when using a liquid containing a volatile organic solvent, a colorant, and a resin component.

By the way, in applicators that use such liquids, coloring agents such as pigments and synthetic pearl agents have a high specific gravity in the liquid storage chamber, so they tend to settle over time. Consideration must be given to liquid agitation to redisperse the colorant that has solidified after settling or settling. Usually, for this liquid stirring, a structure is adopted in which a weight body such as a ball is movably arranged in the liquid storage chamber so that the colorant solidified after the sedimentation described above can be crushed and dispersed.

However, when the above-mentioned weight body is used to stir a liquid, there are the following problems.

In use, as shown in FIG. 7, the cap 101 is fixed to the front part of the applicator 102 and the applicator 102 is oscillated to fill the liquid storage chamber 10.
The stored liquid is stirred by agitating the weight body 104 movably arranged in the applicator 103. During stirring, the weight body 104 collides with the inner surface of the liquid storage chamber 103, and this impact is applied to the front end of the applicator 102. This is transmitted to the inserted pen tip 105, and this causes the pen tip 105 to move forward with respect to the applicator 102.
That is, the pen tip 105 is in pressure contact with the inner surface 106 of the cap 101 as shown in FIG. 8 during stirring and at the end of stirring.
The liquid will adhere to the inner surface 106 of the cap 101 through the cap. However, no particular problem occurs during the first stirring operation when no liquid is attached to the inner surface 106 of the cap 101, but as the stirring operation is repeated two or three times, the inside surface 106 of the cap 101
As the amount of liquid adhering to the inner surface 106 of 1 increases, the liquid becomes semi-solidified and increases in viscosity, and when the pen tip 105 next presses against the same area, it will exert a considerable adhesive force. When the cap 101 is removed from the applicator 102 after the stirring operation is completed, the pen tip 105 remains on the cap 101 side and comes out, causing a problem such as irritation.

(Purpose of the invention) The present invention was devised in view of the above-mentioned problems, and is an applicator with a knob type valve at the tip that can prevent the pen tip from coming off as much as possible when the cap is removed from the applicator after stirring. The aim is to provide a cap.

(Summary of the invention) The present invention is designed to press the pen tip, which is fitted into the front end of the barrel and protrude from the front end, against a paper surface, etc. and retreat against the elastic force of the elastic member. A tip knob that supplies liquid containing a volatile organic solvent, colorant, and resin component stored in a liquid storage chamber to the pen tip by opening an interlocking valve and movably arranging a weight body for liquid stirring. It is a cylindrical cap with a bottom that can be tightly attached to the front part of the applicator with a type valve, and a pen tip receiving part is provided at the bottom of the cap to face the pen tip when the cap is attached. The gist of this applicator is a cap of an applicator with a knob-type valve at the tip, which has a recess provided on the outer periphery of the receiving part, and meets the above-mentioned purpose.

(Example) Hereinafter, the present invention will be explained in detail based on an example.

1 and 2 show a first embodiment of the present invention, and reference numeral 1 is a main body of an applicator 1, which is fitted into the front end of a shaft tube 2 and can protrude from the front end. A pen nib 3, a valve (not shown) facing the rear of the nib 3 and biased forward by an elastic member such as a spring, and a valve (not shown) provided in the barrel 2 behind the valve. , a liquid storage chamber 4 containing a liquid containing volatile organic solvents such as esters, alcohols, and aliphatic hydrocarbons, colorants such as pigments and synthetic pearlescent agents, and resin components such as nitrocellulose and alkyd resins. and a weight body 5 such as a liquid stirring ball movably arranged in the liquid storage chamber 4. By pressing the front end of the pen tip 3 against a paper surface or the like and retracting it, the pen tip 3 can be moved. The valve that can be operated in conjunction with the valve is opened by retreating against the elastic force of the elastic member, and the liquid stored in the liquid storage chamber 4 can be supplied to the pen tip 3 through the gap between the opened valves. ing.
Note that the structure of the applicator 1 is the same as the conventional one, so a detailed description thereof will be omitted; however, in this applicator 1, the pen tip 3 that interlocks with the valve is not integrated with the valve, and the liquid storage chamber is not integrated with the valve. A weight body 5 is movably disposed in the liquid storage chamber 4, and various types of liquid containing a volatile organic solvent, a coloring agent, and a resin component can be adopted.

Reference numeral 6 denotes a bottomed cylindrical cap that is tightly fixed to the front part of the applicator 1 by appropriate means such as rib fitting or screw engagement, and the cap 6 is attached to the bottom of the applicator. A pen tip receiving portion 7 consisting of a columnar projection facing the front end of the pen tip 3 while fixed to the front portion of the pen tip 3 and a recess 8 are provided at an outer peripheral position of the pen tip receiving portion 7. The pen tip receiving portion 7 and the pen tip 3 are connected to the cap 6.
Although it is possible to make contact when the pen tip 3 is fixed, it is better to provide an appropriate interval as shown in the illustrated example so that the front end of the pen tip 3 is not crushed by the pen tip receiving portion 7.

The pen tip receiving portion 7 will be described in detail below in accordance with its action during stirring.

With the cap 6 configured as described above fixed to the front part of the applicator 1, the applicator 1 is vibrated, and the weight body 5 movably arranged in the liquid storage chamber 4 is turbulently stored. When stirring the liquid, as in the conventional case, the pen tip 3 fitted into the front end of the applicator 1 moves forward with respect to the applicator 1 due to the impact caused by the collision of the weight body 5 into the liquid storage chamber 4. I will do it. However, the pen tip 3 that has moved forward comes into pressure contact only with the pen tip receiving part 7 made of a columnar protrusion, and the liquid that adheres through the pen tip 3 is on the tip surface of the columnar protrusion that is the pen tip receiving part 7. Although some of it adheres, it flows into the recess 8 provided on the outer periphery of the pen tip receiving portion 7 and is received, and the pen tip 3 is placed in the cap 6 at the portion where the pen tip 3 comes into pressure contact. There is no amount of liquid left behind that exerts enough adhesive force to remain on the side.
Therefore, even when the cap 6 is removed from the applicator 1 after the stirring operation is completed, the pen tip 3 will not come out of the applicator 1.

Note that the pen tip receiving portion 7 is not limited to the columnar projection shown in the illustrated example. For example, as shown in FIGS. recess 8a between the protrusions
In some cases, as shown in Figs.
A plurality of protrusions having a barrel cross section and a recess 8b provided between adjacent protrusions;
The same effect as described above can be expected even if a plurality of columnar projections as shown in FIGS.

(Effects of the invention) As described above, according to the invention, a pen tip receiving portion is provided at the bottom of the cap that is tightly attached to the front part of the applicator, and faces the pen tip when the cap is attached.
Since a recess is provided on the outer periphery of the pen tip receiving location, even if the pen tip moves forward due to the impact caused by the collision of the turbulent weight body during liquid stirring, the pen tip will not come into pressure contact with the pen. The liquid that adheres through the pen tip partially adheres to the pen tip receiving area, but it flows into the recess provided on the outer periphery and is received. There is no amount of liquid remaining in the pressure-contact area that exerts enough adhesive force to make the pen tip remain on the cap side, so even when the cap is removed from the applicator after stirring, the pen tip remains firmly attached to the applicator. There's no getting out of it.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional view of the main part showing an embodiment of the present invention.
Figure 2 is a sectional view taken along the line A-A in Figure 1, Figure 3 is a longitudinal sectional view of the cap showing another example, Figure 4 is a sectional view taken along the line B-B in Figure 3, and Figure 5 is another example. 6 is a longitudinal cross-sectional view showing an example of
FIG. 8 is a vertical cross-sectional view of a main part showing a conventional example. 1... Applicator, 2... Barrel, 3... Pen tip, 4
...liquid storage chamber, 5...pyramid, 6, 6a, 6b...
...Cap, 7, 7a, 7b...Pen tip holder,
8, 8a, 8b... recess.

Claims (1)

[Scope of utility model registration request] The pen tip, which is inserted into the front end of the barrel and projects from the front end, is pressed against the paper surface and moved back against the elastic force of the elastic member, thereby opening the valve that can be linked with the pen tip and stirring the liquid. At the front of an applicator with a knob-type valve at the tip, the liquid containing volatile organic solvent, colorant, and resin component is supplied to the pen tip, which is stored in a liquid storage chamber in which a weight body for use can be moved freely. The cap is a cylindrical cap with a bottom that can be tightly fixed, and the bottom of the cap is provided with a pen tip receiving part that faces the pen tip when the cap is fixed, and a recess is provided on the outer periphery of the pen tip receiving part. A cap for the applicator with a knob-type valve at the tip.