JP2550584Y2 - Writing implement - Google Patents

Description

[Detailed description of the invention] (Industrial application field) Temporary fountain pens, small tube type writing implements, cosmetics, etc., with a temporary ink reservoir groove with a comb-shaped vertical cross section between the ink tank and the pen tip A writing instrument having an ink reservoir member interposed therebetween, wherein the temporary ink reservoir member has a bore, and an air introduction passage to the bore, and the air passage is provided in the bore. The present invention relates to a device in which an ink guide member is inserted so as to have a gap.

(Prior Art) Various writing instruments using the above-mentioned temporary ink reservoir member are known, and various studies for improving the function have been made. For example, when ink is stored in the temporary ink reservoir, one of the measures to make the ink retract into the ink tank in preference to air is the interrelation of the ink holding power of the temporary ink reservoir, etc. There is also a device that focuses on (see Japanese Utility Model Publication No. 61-32790).

(Problem to be Solved by the Invention) The temporary ink reservoir member and the ink guide member inserted into the bore of the temporary ink reservoir member utilize the capillary force effectively, and the relationship between these two members also depends on the capillary force. The relationship with the ink discharge force of the pen tip is considered.

Therefore, even if a suitable relationship can be satisfied with a certain pen tip, it is not always satisfied with another pen tip.

(Means for Solving the Problems) According to the present invention, a temporary ink reservoir groove having a comb-shaped longitudinal cross section and a slit communicating the temporary ink reservoir groove are interposed between the ink tank and the pen tip. A writing instrument, wherein the temporary ink reservoir member has a bore, and an air introduction path to the bore located at the rear end of the slit,
Further, in a configuration in which an ink guide member is inserted into the bore so as to have a gap with the air introduction path, a modified cross section in which the size of the gap is different between the ink guide member and the air introduction path. The gist of the present invention is to provide a writing implement which is provided with a surface portion, and the size of the gap between the ink guide member and the air introduction passage can be set by determining the direction in which the side surface facing the air introduction passage is arranged.

(Example) An example is shown in attached FIGS. 1 to 3.

First, in FIG. 1, a shaft cylinder 1 has an ink tank 2 in a rear inner hole, and a temporary ink reservoir member 3 is inserted into a front end opening. The temporary ink reservoir member 3 of this embodiment includes a temporary ink reservoir groove 4 having a comb-like vertical cross section, a middle hole 5 serving as a through hole, and a slit 6 communicating with the temporary ink reservoir groove 4.
An air introduction path 7 provided at a rear end of the slit 6 in series,
It has a slit 6 and a concave portion 8 for securing an air hole on the opposite side of 180 °, and is positioned while absorbing the dimensional variations while sealing the ink tank 2 by an annular member 9 having elasticity. In addition, in the inner hole 5 of the temporary ink reservoir member 3, an ink guide member 10 made of a fiber converging body or a synthetic resin molded body has a rear end located in the ink tank 2 and a front end located at the temporary ink reservoir member. 3 is inserted so as to be located in the chip holder 11 attached to the tip of the third. Further, an ink relay core 13 is inserted into the tip holder 11 and the tip 12 attached to the tip of the tip holder 11 so as to be connected to the ink guide member 10, and a ball at the tip of the tip 12 is provided.
The ink is led out to 14. Here, the ink guide member 10, the tip holder 11, the tip 12, the ink relay core 13, and the ball 14 are prepared in advance as an assembly. Reference numeral 15 indicates an air hole.

As shown in FIG. 2, the direction of attachment of the chip holder 11 to the temporary ink reservoir member 3 is specified by fitting a hexagonal cross section.

Further, as shown in FIG. 3, the cross-sectional shape of the ink guide member 10 at the air introduction path 7 is formed by connecting circular arcs having different diameters every 120 °. It faces the air introduction path 7.

As described above, the present embodiment is an example of a ball-point pen. Ballpoint pens are made with a very small clearance between the tip and the ball, and other writing instruments, such as those made by extruding synthetic resin with a nib, or those with a fiber convergent or foamed nib In general, the amount of ink ejected per a fixed writing distance is smaller than that of the above. Therefore, the ink guide member 10, the chip holder 11, the chip 12, the ink relay core 13, and the ball 14, which are prepared in advance as an assembly, are moved in the direction with respect to the temporary ink reservoir member 3 as shown in FIG. Identify and attach, then
As shown in FIG. 3, the gap between the ink guide member 10 and the air introduction passage 7 of the temporary ink reservoir member 3 is reduced, so that the air that enters the hole 5 through the air introduction passage 7 is reduced. The amount of ink derived in substitution is reduced.

 Next, another example is shown in FIG. 4 and FIG.

This example has most of the members in common with the previous example. Temporary ink reservoir 3 and ink guide 10
Is also one of the common members. The difference is that instead of the tip 12, the ink relay core 13, and the ball 14 in the previous example, it is made of a fiber convergent body, etc., and the handwriting width is wider than the previous example, so the ink ejection amount per fixed writing distance is also It only uses more nibs 16 than the ones.

However, as shown in FIG. 5, the arc portion having the smallest diameter of the ink guide member 10 faces the air introduction path 7 of the temporary ink reservoir member 3.

That is, in accordance with the use of the pen tip 16 as described above, the gap between the ink guide member 10 and the air introduction path 7 of the temporary ink reservoir member 3 is made larger than that of the previous example. Thus, the amount of ink that is introduced in a manner to replace the air that has entered the inner hole 5 through the air introduction path 7 is not significantly suppressed.

 Various things can be done in addition to the above.

First, regarding the ink guide member, the cross-sectional shape of the ink guide member 10 at the air introduction passage 7 of the temporary ink reservoir member 3 is, for example, a substantially square cross-sectional shape as shown in FIG. Or an elliptical cross section as shown in FIG. It is sufficient that the size of the gap between the temporary ink reservoir member 3 and the air introduction path 7 can be set by determining the orientation of the arrangement in the middle hole 5. The attachment to the target ink reservoir member 3 may be made as appropriate according to these. For example, the seventh
Rather than what is shown in the figure, the mounting is specified in the direction specified by a hexagonal shaped cross-section fitting,
The mounting may be such that fine adjustment by rotation is possible. It is often desired to make fine adjustments, such as when using the same type of ballpoint pen but with different handwriting widths, or when using the same type of penpoint with variations in ink ejection force. Also, the ink guide member, for example,
It can be integrated with other members such as the pen tip 16. In the case of fine adjustment as described above, it may be desirable to integrate them in this way.

Next, the temporary ink reservoir member will be described. The temporary ink reservoir groove 4 having a comb-like vertical cross section is easily formed by a large number of flange-shaped meat portions, but may also be formed by a spirally formed meat portion. The hole 5 may not be a through-hole, the air introduction path 7 may be provided in series with the slit 6 or not, and the recess 8 is not necessarily required. Also,
Instead of using the annular member 4, the temporary ink reservoir member 3 may have a corresponding meat portion integrally.

For other members, for example, a replaceable ink tank may be used instead of the shaft cylinder integrated with the ink tank.

(Effects of the Invention) The present invention is a writing implement in which a temporary ink reservoir groove having a comb-shaped longitudinal section and a slit communicating with the temporary ink reservoir groove are interposed between the ink tank and the pen tip. Wherein the temporary ink reservoir member has a bore, and an air introduction path to the bore located at the rear end of the slit, and a gap between the air introduction path and the bore in the bore. Wherein the ink guide member is provided with a deformed cross-sectional portion having a different size of a gap between the ink guide member and the air guide path, and the air guide path of the ink guide member is provided. The size of the gap with the air introduction path can be set by determining the direction of arranging the side face facing the ink supply path. In settings in relation to power Therefore, it can be highly versatile.

[Brief description of the drawings]

FIG. 1 is a partially cutaway longitudinal sectional view showing an example of the writing instrument of the present invention, FIG. 2 is a transverse sectional view taken along the line II of FIG. 1, and FIG.
FIG. 4 is a cross-sectional view taken along the line II-II of FIG. 4, FIG. 4 is a vertical cross-sectional view showing another example, FIG. 5 is a cross-sectional view taken along the line III-III of FIG. 4, and FIG. FIG. 3 is a cross-sectional view corresponding to FIG. 3, and FIG. 7 is a cross-sectional view corresponding to FIG. DESCRIPTION OF SYMBOLS 1 ... Shaft cylinder, 2 ... Ink tank, 3 ... Temporary ink reservoir member, 4 ... Temporary ink reservoir groove, 5 ... Medium hole, 6
…… Slit, 7… Air introduction path, 8… Recessed part, 9…
… Circular member, 10… ink guide member, 11… tip holder, 12… tip, 13… ink relay wick, 14… ball, 15… air hole, 16… pen tip.

Claims (1)

(57) [Scope of request for utility model registration] 1. A writing implement comprising a temporary ink reservoir groove having a comb-like longitudinal cross section and a slit communicating with the temporary ink reservoir groove between an ink tank and a pen tip. A target ink reservoir member, having a bore, and an air introduction path to the bore located at the rear end of the slit,
Further, in a configuration in which an ink guide member is inserted into the bore so as to have a gap with the air introduction path, a modified cross section in which the size of the gap is different between the ink guide member and the air introduction path. A writing implement having a surface portion, wherein the size of the gap between the ink guide member and the air introduction path can be set by determining the direction in which the side surface of the ink guide member facing the air introduction path is arranged.