JPH0226694Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a pen that is attached to a recording device such as a printer or a recorder so as to move relative to and away from recording paper.

In contrast to a pen in which a container for storing ink and a recording section are connected by an ink feeding tube, pens in which the recording section is held protruding from the opening at the tip of the container can be easily replaced and can be used in a variety of types. It has the advantage of being able to record a desired color without any trouble even with different ink colors.

However, due to the need to increase response speed as a recording device, the latter type of pen is sometimes limited to being lightweight and small (for example, about 5 mm in thickness and 20 mm in length). It is desirable to do so, and this desire leads to various problems.

One of the problems is ink drying. In other words, if a pressure difference occurs between the inside and outside of the container, it will lead to ink overflow (if the internal pressure is high) or insufficient ink discharge (if the internal pressure is low), so it is necessary to form an air path that communicates between the inside and outside of the container. However, the evaporated components of the ink come out through this air passage, and as mentioned above, in order to make the whole body lighter and smaller, the absolute amount of ink stored must be reduced, so the evaporated components Even if the absolute amount is small, it cannot be ignored in relative terms, and therefore it is extremely important to suppress it.

The present invention has been devised in view of the above points, and will be described below based on embodiments shown in the accompanying drawings.

In FIG. 1, reference numeral 1 is a container. For example, it is made by press-molding metal such as stainless steel, aluminum, or brass, and if necessary, is subjected to appropriate surface treatment to prevent corrosion by ink, and the rear end 1a is integrally closed.
A recording section A is held in a protruding manner at the tip opening 1b of the container 1. Recording part A in this example shows a ballpoint pen body, which consists of a ball 2, a tip 3, a tip holder 4, and an ink relay core 5, but instead of the ball 2, a pipe and a needle that slides inside the pipe are used. Other structures may be used, such as a pipe pen structure using a needle body and an elastic body such as urethane that imparts elasticity to the needle body. A tip 3 that rotatably holds the ball 2 is press-fitted into a tip holder 4 that forms an air passage 6 (described later) with the tip opening 1b of the container 1, and the tip holder 4 is also attached to the container 1. Press-fitted and fixed. An ink relay core 5 having an appropriate ink passage, such as a resin extrusion molded body or a fiber bundle, is inserted into the chip 3 and the chip holder 4, and if necessary, the part indicated by the arrow B is subjected to an appropriate fixing process such as heating with a lever. . Rear end 5a of ink relay core 5
is connected to an ink holder 7 made of felt, fiber bundle, etc., and the side of the ink holder 7 is covered with a film-like cover 8 such as cellophane or polypropylene. A small space 9 through which air can pass is formed between the two.
An intervening member 10 is disposed between the ink holder 7 and the rear end portion 1a of the container 1, and this intervening member 10 has a recess 10a communicating with the small space 9. This guarantees that air can enter from the inside. Regardless of the ink retaining structure, when using the ink retainer 7 that retains ink by capillary force as in this example, air is drawn from the rear of the ink retainer 7 in order to effectively consume ink. It is preferable to include. In addition, modifications for that purpose are possible as appropriate; for example, a simple spherical body may be used as the intervening member 10.

Now, the air passage 6 will be explained. As shown in FIG. 1, the lower half of the tip holder 4 is drawn so that its outer wall is shown, the air passage 6 is formed between a screw-shaped groove 4a formed in the outer wall of the tip holder 4 and the tip opening 1b of the container 1. It is formed as a gap between The inner space of the cap 11 (indicated by a dashed line in the figure) and the container 1, which are fitted as appropriate when not in use, etc.
This air passage 6 communicating with the inner space is connected to the cap 11.
When the cap 11 is removed from the cap 11 (when in use or even when not in use, it is often left detached from the cap 11 after being attached to the recording device), it serves as an outlet for the evaporated components in the ink. The longer the path is, the better, and the screw-shaped groove 4a is an extremely preferable example that satisfies this requirement.

An air passage similar to air passage 6 in FIG. 1 may be, for example,
It can also be formed into a multi-line groove or a meandering groove as appropriate.

FIGS. 3 and 4 show another example of the air passage.

The air passage 601 in FIG.
The air passage 601 is similar to the air passage 6 in FIG. They are different in that they are formed with intervals.

Although this example has the disadvantage that the length of the air passage is shorter than the example shown in FIG. 1, it has the advantage that the air passage itself is hard to collapse. That is, the tip holder 401 can increase the force of press-fitting into the container 1 and secure a sufficient bonding margin when the tip holder 401 is press-fitted and bonded together. In addition, in FIG. 3, the tip holder 40
The front part of the container 1 is a large diameter part, which is provided with a locking part for the container 1.

Moreover, FIG. 4 shows that the formation position of the air passage can be changed as appropriate. That is, in FIG. 4, the container 102 does not have an integrally closed rear end;
A separate stopper 122 is used, and the tip holder 402 is attached to the container 102 in a sealed manner without forming an air passage. The air passage 602 is formed based on the recess 122a formed in the plug body 122. Plug body 122
The recess 122a is formed by the threaded groove 4a of the tip holder 4 in FIG. 1 and the intervening member 1 in FIG.
This corresponds to a combination of 0 and 0 recesses 10a. Considering that it is actually rare that a cap is attached to a recording device even when not in use once it is attached to the recording device, we have decided to take into account the limitations imposed by the mounting structure of the recording device, which is determined according to various needs. One premise is that the shape and structure can be changed as appropriate.

As mentioned above, the pen of the recording device of the present invention is
In order to suppress the problem of ink drying in which the evaporated components of the ink come out through the air passage in the case where the recording part is held protruding from the opening at the tip of the container storing the ink, at least the air passage is A part of the air passage is formed in a spiral shape, and even if the overall length of the air passage forming member has to be considerably shortened due to the desire to be lightweight and compact, an air passage of sufficient length can be formed. Moreover, even if ink were to adhere to the air passage due to ink scattering due to impact during use, the air passage has a part that runs obliquely to the axis of the pen, so that the adhered ink will not be removed. This also prevents particles from flying out from outside the container and staining the recording paper surface. Furthermore, since this air passage is secured between the container and the member press-fitted into the container, its function can be reliably performed even if the movement of contact with and separation from the recording paper is repeated.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention, FIG. 2 is a perspective view of the intervening member shown in FIG. 1, FIG. 3 is a perspective view showing another example of the tip holder, and FIG. FIG. 2 is a vertical cross-sectional view showing one embodiment of the invention. A... Recording section; 1,102... Container; 1a...
Rear end; 1b... Tip opening; 2... Ball; 3
... Chip; 4,401,402... Chip holder; 4a, 401a... Groove; 5... Ink relay core; 5a... Rear end; 6,601,602... Air path; 601a... Spiral shaped part; 7... ink holder; 8... cover; 9... small space; 10... intervening member; 10a... recess; 11... cap; 1
22...Plug body; 122a...Recessed portion.

Claims (1)

[Scope of utility model registration request] A pen of a recording device that is attached to make relative movement of contact with and separation from recording paper, in which a recording part is protruded and held at the opening at the tip of a container storing ink, and an air passage communicating between the inside and outside of the container is provided. In the recording device, the air passage is secured between the container and a member press-fitted into the container, and at least a part of the air passage is formed in a spiral shape. pen.