JPH078234Y2 - Writing instrument - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a raw ink type writing instrument having an ink tank for storing ink in a raw ink state. Examples of writing instruments include fountain pens, small-tube writing instruments, and makeup tools.

(Prior art) Unlike a batting that holds and stores ink by capillary force, in a raw ink type writing instrument that uses an ink tank that stores ink in a raw ink state, the ink in the ink tank is self-weight. Since there is no problem in the general case of writing with the pen tip facing down, depending on the direction of the pen tip, ink may be supplied to the pen tip even though it is still in the ink tank. There may be the drawback of disappearing.

On the other hand, for example, one measure is disclosed in Japanese Utility Model Publication No. 55-28536. By the way, the description of the utility model registration claim of the gazette states that "a main body having an ink chamber for containing a liquid ink and a filling chamber filled with an absorber for storing the liquid ink, and one end thereof being in the filling chamber. A pen tip made of a porous material supported by the main body so that the other end thereof protrudes to the outside, and the ink in the ink chamber is fed from the filling chamber to the ink by capillarity. A writing instrument, comprising: a string-shaped feeder extending into the ink chamber, wherein the feeder is flexible so that a weight attached to a tip thereof can freely move in the ink chamber by the action of gravity. It is.

(Problems to be Solved by the Invention) In the invention disclosed in the above publication, since the string-shaped ink feeder moves in the ink chamber by the weight attached to the tip, the ink is supplied to the pen tip regardless of the writing direction. Will be done again
Although the ink is consumed to the end, on the other hand, there is a fear that the weight may damage the ink chamber or the string-shaped ink feeder itself may become entangled, and the intended purpose may not be achieved. is there.

(Means for Solving the Problems) In addition to forming ink holding portions reaching the side edges at both front and rear ends of an inner wall of an ink tank, a rod-shaped ink guide core for supplying ink from an ink tank to a pen tip is Connect to both ink holders on the inner wall of the tank. That is,
The present invention is a raw ink type writing instrument having an ink tank for storing ink in a raw ink state, in which ink holding portions reaching side edges are formed at both front and rear ends of an inner wall of the ink tank. A gist of a writing instrument is one in which a rod-shaped ink guide core for supplying ink from a tank to a pen tip is connected to both ink holding portions on the inner wall of the ink tank.

(Example) An example is shown in the attached FIG. A pen tip 2 having an appropriate shape and material is attached to the tip of the barrel 1.
The rear end has an ink reservoir groove having a comb-like shape in a vertical cross section. It is connected to an ink guiding core body 4 which penetrates a so-called center hole of the bellows 3. The ink guide core 4 is a fiber bundle,
It is composed of a continuous porous ceramic, a resin foam, or an injection-molded product having an ink lead-out path formed, and may be an integrated product with the pen nib 1 as appropriate, but it is rod-shaped as a whole,
The rear end 4a extends to the rear end of the inner wall 5a of the ink tank 5. Further, ink holding portions 6-1, 6-2 for holding ink by capillary force are formed at the front end portion and the rear end portion of the inner wall 5a of the ink tank 5, respectively. -2 is connected to the ink guiding core body 4 so that the ink held by itself can be supplied to the ink guiding core body 4. In addition, the ink holding units 6-1, 6-2 are
Side edges of the inner wall 5a of the ink tank 5 (upper and lower edges in the figure)
Has reached. Here, the illustrated ink holding units 6-1, 6
-2 is separate from the barrel 1 that constitutes the ink tank 5, and examples thereof include felt, communicating porous ceramics, resin foam, and the like. The groove may be formed integrally with the inner wall 5a of the ink tank 5 as a groove that extends radially to the side edge around the connection portion with the ink container 4. Reference numeral 7-
1, 7-2, 7-3, 7-4 are protrusions that may be formed in an appropriate number for fixing the ink holding portions 6-1, 6-2, and 8 are formed in appropriate places for ink-air exchange. The clearance 9 is an O-ring used for liquid tightness. In addition, a temporary ink reservoir member may be used in place of the bellows 3, or the ink tank 5 may be separately provided from the shaft cylinder 1 so as to be replaceable.

(Effect of the device) When writing with the pen tip facing down, the ink is supplied to the ink guide core through the ink holding part formed at the front end of the inner wall of the ink tank, and the pen tip faces up. When writing, the ink is supplied to the ink guide core 4 through the ink holding portion formed at the rear end portion of the inner wall of the ink tank. Can be supplied to the nib.
Moreover, at that time, the ink guide core does not damage the ink tank such as the above-mentioned breakage due to the weight, and there is no problem such as entanglement of the string, so that it is suitable for long-term use. But it is stable.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention. 1 ... Shaft cylinder, 2 ... Nib, 3 ... Bellows, 4 ... Ink guide core, 4a ... (Ink guide core) rear end, 5 ...
… Ink tank, 6-1, 6-2 …… Ink holding part, 7-1, 7-
2, 7-3, 7-4 ... Protrusion, 8 ... Gap, 9 ... O-ring.

Claims (1)

[Scope of utility model registration request] 1. A raw ink type writing instrument having an ink tank for containing ink in a raw ink state, wherein ink holding portions reaching side edges are formed at both front and rear ends of an inner wall of the ink tank, A writing instrument in which a rod-shaped ink guide core that supplies ink from an ink tank to a pen tip is connected to both ink holding portions on the inner wall of the ink tank.