JPH0445914Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to an improvement in a liquid writing instrument that uses a relatively high viscosity ink in which a pigment or the like is dispersed in a medium, or a cosmetic liquid.

(Prior Art) Various types of liquid writing instruments have been known in the past, in which a valve body is opened by pressing the pen body, and ink in a rear shaft ink storage chamber is supplied to the pen body. These devices have a very convenient structure for supplying relatively high viscosity liquid to the pen body, so they have come to be widely used in various fields. In this process, the problem of ink dripping is likely to occur, and there is a current demand for a solution to this problem.

In recent years, in an attempt to solve this problem, the first valve element is opened by pressing the pen body, and then the second valve element is opened after a certain interval, and the ink storage chamber of the rear shaft is opened. A liquid writing instrument with a so-called double valve structure has been proposed, in which ink is supplied to the pen body through a second valve body and a first valve body. This product has an excellent feature in that the flow of ink is regulated in stages by two valve bodies, which alleviates the problem of ink dripping.
Here, in a writing instrument having the valve structure as described above, it is obvious that if the ink storage chamber is not provided with a space and the ink is stored closely, it will lead to the abnormal outflow of ink as described above. So,
Naturally, a space where no ink exists is provided in the ink storage chamber.

(Problem to be solved by the invention) However, a new problem was discovered through research by the inventors. That is, if the environmental temperature when using such a liquid writing instrument is higher than the temperature at the time of manufacturing and assembly, the pressure inside the system will increase because the ink storage chamber is a sealed system, and as a result, the first When the valve body and the second valve body are successively opened,
The problem is that the ink in the ink storage chamber blows out due to the pressure, making it difficult to use for writing.

(Means for solving the problem) The present invention opens the first valve body by pressing the pen body, then opens the second valve body,
In a liquid writing instrument in which ink in a rear shaft ink storage chamber is supplied to the pen body, the valve rod on which the second valve body is formed has a rear end extending into the ink storage chamber, and the valve rod has a rear end extending into the ink storage chamber. The rod is provided with a hole that opens at both ends in the longitudinal direction, and the opening of the valve rod on the side of the ink storage chamber is located in the space inside the ink storage chamber when the pen body is facing downward. This article focuses on liquid writing instruments that are characterized by:

Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.

1 and 2 show an embodiment of the present invention, and reference numeral 1 is a pen body made of various fiber bundles, sintered bodies, etc. It is arranged slidably within the hole 2a. The rear end of this pen body 1 is connected to a first valve body 3a, and this first valve body 3a is connected to a first valve seat 3b arranged in the front shaft 2 by a first spring in the closing direction. 3
It is repelled by c. Reference numeral 4 is a bottomed cylindrical rear shaft having an ink storage chamber 6 containing ink 5, and a spring receiver 7d and a second valve seat 7b are arranged in this order in the opening of the rear shaft 4. These are narrowly fixed by the front shaft 2 and rear shaft 4 shown above. And the second valve seat 7b
, there is a second valve body 7 formed at the tip of the valve rod 7e.
a is elastically repelled in the closing direction by a second spring 7c stretched between the valve rod 7e and the spring receiver 7d, and the tip of the valve rod 7e is connected to the first valve body 3.
The valve rod 7e is arranged at a distance l from the rear of the valve rod 7e, and its rear end extends deep into the ink 5, and the valve rod 7e has a small hole 7 that is open at both ends throughout its entire length.
f is provided.

(Function) In the above configuration, when writing, first,
Press the pen body 1 against the paper surface P and press the first spring 3
The first valve body 3a is opened with respect to the first valve seat 3b against the elastic force of c. (See Figure 2) At this time, the pressure within the system in the ink storage chamber 6 becomes approximately equal to that of the outside air through the pore 7f provided in the valve rod 7e. This will prevent ink from blowing out due to the pressure increase that occurs. Next, when the pen body 1 is further pressed, that is, when the pen body 1 is finally pressed for more than the distance l shown in FIG. The first valve body 3a collides with the rod 7e, and the first valve body 3a also collides with the valve rod 7e.
e is pressed against the elastic force of the second spring 7c, and as a result, the second valve body 7a opens against the second valve seat 7b, and the inside of the ink storage chamber 6 is The ink 5 is applied to the second valve seat 7b and the first valve seat 3b.
The water is supplied to the pen body 1 through the respective steps. If you completely stop pressing the pen body 1 at this stage and write with normal pressure from now on, there will be no ink dripping.
Good ink is ejected from the pen body 1.

The specific embodiment of the present invention is not limited to the above-mentioned embodiments, but the point is that the pressure increase in the ink storage chamber system is reduced to a pore provided in a valve rod having a second valve body in a double valve structure. There is no problem as long as it is resolved, but the length of the rear end of the valve rod is
When the barrel is turned upside down and the pen body is facing downward, it is necessary to set it in such a way that it protrudes to some extent from the surface of the ink at that time.

(Effect of the invention) As described above, the present invention opens the first valve element by pressing the pen body, and then opens the second valve element, thereby discharging the ink in the rear shaft ink storage chamber. In the ink-type writing instrument configured to supply ink to a pen body, the rear end of the valve rod on which the second valve body is formed extends into the ink storage chamber, and the valve rod has both ends in the longitudinal direction. A pore is provided to be opened, and the opening on the side of the ink storage chamber of the valve rod is located in the air part of the ink storage chamber when the pen body is facing downward, so that when writing, the ink storage chamber side can be opened. To provide a liquid type writing instrument which can prevent ink from blowing out as much as possible even when pressure rises in the system, and does not cause ink droplets, etc., and exhibits extremely excellent effects.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal cross-sectional view of a liquid-type writing instrument, and FIG. 2 is a longitudinal cross-sectional view showing the state in which the liquid-type writing instrument shown in FIG. 1 is used. DESCRIPTION OF SYMBOLS 1... Pen body, 3a... First valve body, 4... Rear shaft, 5... Ink, 6... Ink storage chamber, 7a...
...second valve body, 7e...valve rod, 7f...pore.

Claims (1)

[Scope of utility model registration request] In the liquid writing instrument, the first valve body is opened by pressing the pen body, and then the second valve body is opened, thereby supplying ink in the rear shaft ink storage chamber to the pen body. The rear end of the valve rod in which the second valve body is formed extends into the ink storage chamber, and the valve rod is provided with a hole that opens at both ends in the longitudinal direction, and the ink of the valve rod is A liquid writing instrument characterized in that an opening on the side of the storage chamber is located in a space inside the ink storage chamber with the pen body facing downward.