JPS635915Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a marking pen equipped with a valve mechanism.

2. Description of the Related Art Conventionally, many so-called push-type marking pens have been put into practical use, in which a valve of an internal valve mechanism is opened by pressing the pen tip against a writing surface, and ink is supplied to the pen tip to enable writing.

However, in these conventional push-type marking pens, when the pen tip is repeatedly pressed against a writing surface such as paper to open and close the valve, the ink that flows out is impregnated into the pen tip and becomes ready for writing.
Excess ink flows along the outer periphery of the nib body and the inner wall of the holder, overflowing into the nib and staining the writing surface, resulting in a phenomenon called smudging or doubling. In addition, it is common knowledge that push-type marking pens with fiber nibs and push-pull marking pens with plastic nibs that have recently been commercially available both have the above-mentioned drawbacks, especially when the nib is It has been pointed out that plastic nibs for fine print have a drawback in that they tend to bleed when pressed. For example, in a marking pen that consists of a pen tip, an ink guide core, and a valve mechanism, such as the structure shown in Japanese Utility Model Application Publication No. 57-70884, the ink that flows out from the valve is collected even if there is an ink guide core and an ink holder. Excess ink tends to drip from around the pen tip, a drawback of conventional push-pull marking pens that remains unresolved.

The present invention has been made in view of these points, and an object of the present invention is to provide a push-type marking pen that eliminates the conventional drawbacks and has a structure that does not cause the drop-off phenomenon.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a longitudinal cross-sectional view of the entire pen as an example, and FIG. 2 is a front view of the pen tip of FIG. 1.

The shaft cylinder 15 has ink (not shown) and an ink stirring mass 14 in an internal ink storage part 13,
The valve mechanism A is fitted into the opening at the tip of the holder 7.
The pen tip body 2 is held by a protrusion 8' provided at the tip of the holder 7, and an ink storage box 1 and an ink absorber 6, which will be described later, are arranged inside the valve mechanism A. Hold the tension.

The valve mechanism A includes a valve seat 12 having a conical surface inside thereof.
is provided at the rear end of the packing body 5 which is fitted into the front part of the valve mechanism and held between it and the holder 7,
The rear part 1b of the ink storage box 1 is slidably and airtightly fitted into the front part of the cylindrical inner surface of the packing body 5, while the valve 1 is fitted in such a way that it abuts against the valve seat 12 and is closed.
A valve body 10 having a diameter of 0a is biased by a spring 11, and a support rod 4 of an ink storage box 1, which will be described later, is fitted into a concave hole provided at the center of the valve body 10 and comes into contact with a concave portion 10b of the valve body. are connected. Note that the support rod 4 can also be provided on the valve body 10 side.

Further, the ink reservoir box 1 has its rear part 1b airtightly fitted into the front part of the packing body 5 of the valve mechanism A as described above, and has a plurality of ink inlets 3 in the rear part and a support rod in the center thereof. 4 is formed, and the support rod 4 is connected to the valve body 10 as described above, so that the movement of the ink reservoir box 1 and the opening and closing of the valve are linked. small hole 1
a is bored and the rear end 2b of the pen tip body 2 is attached. Note that FIG. 4 is a sectional view of the rear part 1b of the ink storage box 1 taken along the - line in FIG. 1, and shows the state of the ink inlet 3. The inside of the ink storage box 1 may be filled with an ink retainer 9 such as fibers, resin-treated fiber bundles, felt, sponge, porous or reticulated plastic, etc., as required.

Further, a stepped portion 1 at the rear part 1b of the ink storage box 1
A breathable ink absorber 6 such as a sponge is provided between the gasket body 5 at the front of the valve mechanism and the rear peripheral edge of the reservoir box, and the tip 2a of the nib body 2 is provided with a breathable ink absorber 6 such as a sponge.
When pressed, it is compressed and contracted between the stepped portion 1c of the storage box 1 and the front surface of the packing body of the valve mechanism. Also, an ink storage box rear part 1 in front of the packing body 5 fitted into the front part of the valve mechanism A is provided.
1 and 3, which is an end view of the front part of the packing body 5 taken along the line - in FIG. The space between the air permeable ink absorber 6 and the inside of the ink storage box 1 is the air groove 5a and the inside hole 5b of the gasket during writing.
An air flow passage is formed through the ink inflow port 3, but when the pen tip 2a is pressed to open the valve and replenish ink to the ink storage box 1, the air groove 5a is blocked by the ink storage box rear part 1b. The length of the air groove 5a is formed so that the air flow path is cut off.

On the other hand, the pen tip body 2 can be made of various materials such as fiber, plastic, metal, and ceramic. If necessary, these can be covered and reinforced with a pipe 2c made of metal, plastic, etc., except for the front end 2a and rear end 2b.
Further, as shown in FIG. 2, which is a front view of FIG. 1, an air groove 8 is formed at the tip of the holder 7, and the pen tip body 2 is supported by a plurality of protrusions 8'.

FIG. 6 shows another embodiment of the present invention,
Packing body 5 of valve mechanism A in rear part 1b of ink storage box
An air hole 1d is formed on the side surface of the fitting part with the front part toward the inside of the storage box to form an air flow path between the breathable ink absorber 6 and the inside of the ink storage box 1. The position of the air hole 1d communicates between the inside of the ink reservoir box 1 and the ink absorber 6 during writing, and when pressing the pen tip 2a to replenish ink to the ink reservoir box 1, The air hole 1d is bored at a position where it is closed by the inner surface of the packing body 5 and communication between the inside of the ink storage box 1 and the ink absorber 6 is cut off. Note that FIG. 7 is a sectional view of the ink storage box rear part 1b taken along the - line in FIG. 6.

In addition, it is also possible to omit the ink absorber 6 in the above.

The present invention is constructed as described above, but in the case of writing, since the pressing force of the pen tip is not large, a breathable ink absorber is used as shown in FIGS. 1 and 3, which are the first embodiment. If an air groove for communicating between the body 6 and the inside of the ink reservoir box 1 is recessed in the inner surface of the packing which is the fitting part, air enters the holder 7 from the air groove 8 at the tip of the holder and the ink reservoir Box 1
The air passes through the air permeable ink absorber 6 from the gap 16 between the outer wall of the holder and the holder 7, passes through the air groove 5a, the inner hole 5b of the packing body, and the air inlet 3, and then enters the ink storage box 1.
The ink holder 9 is supplied with the ink. Therefore, when writing, air flows into the ink reservoir as the ink is consumed from the pen tip 2a, allowing smooth writing.

Next, when replenishing ink into the ink storage box 1, as shown in FIG.
The blockage of the valve 10a is released, and the ink flows through the valve mechanism A.
The ink flows out from the ink inlet 3 to the ink storage box 1.
flow inside. At this time, the ink storage box rear part 1b
Since the inner wall of the packing body 5 is airtightly fitted and the air groove 5a is closed, all the ink flowing out from the valve mechanism A flows into the ink storage box 1 without leaking. Further, the ink in the ink storage box 1 flows out to the pen tip body 2, and the ink in the pen tip body 2a flows out.
It becomes possible to write on it. At this time, as described above, ink is prevented from flowing toward the gap between the holder 7 and the outer wall of the ink storage box 1, and
Ink flows into the ink reservoir box 1 and is retained in the ink holder 9, and even if the valve seat 12 is closed, the excess ink can be kept airtight between the ink reservoir box 1 and the valve mechanism A. This automatically stops ink from flowing out. Therefore, the ink flows smoothly and quickly into the pen tip body 2, and the ink becomes ready for writing soon after being pushed.Moreover, unlike the conventional push-type marking pen, the ink flowing out from the valve mechanism flows into the pen tip. There is no drawback that the liquid flows along the outer circumference of the body and the inner wall of the holder to the pen tip opening and overflows from the pen tip.

Next, as shown in FIGS. 6 and 7, which are the second embodiment, an air hole for communicating between the breathable ink absorber 6 and the inside of the ink storage box 1 is inserted into the ink ink absorber 6, which is a fitting part. If the storage box is bored on the side of the rear part 1b, the pressing force of the pen tip is not large during writing, so air flows into the holder 7 from the air groove 8 at the tip of the holder, as in the first embodiment. The ink enters the ink storage box 1 through the gap 16 between the outer wall of the ink storage box 1 and the holder 7, passes through the air-permeable ink absorber 6 and the air hole 1d, and flows to the ink holder 9 inside the ink storage box 1. Therefore, writing can be done smoothly as in the first embodiment. Furthermore, when replenishing ink into the ink storage box 1, as shown in FIG. 8, if the pen tip 2a is directed downward and pressed a little forcefully against a surface P such as a writing surface, the same process as in the first embodiment is performed. The ink flows out from the valve mechanism A and flows into the ink storage box 1, but at this time, the air hole 1d of the storage box is blocked by the inner wall surface of the packing body 5, so the ink that flows out from the valve mechanism A does not leak. All of the ink flows into the ink storage box 1. In this case, as in the first embodiment, even if the valve seat 12 is closed, the ink storage box 1 and the valve mechanism A are kept airtight, so that the excess ink is automatically drained out. can be stopped. Similarly to the first embodiment, the ink flowing out from the valve mechanism does not flow through the outer circumference of the nib body and the inner wall of the holder to the nib opening and overflow from the nib, as in the first embodiment.

In addition, although the embodiment has been described in which the ink retainer 9 is filled in the ink reservoir box 1, depending on the viscosity of the ink, it is not necessary to fill the ink retainer 9 in the ink reservoir box 1. The properties of the ink carrier 9 are adjusted depending on the properties of the ink.

FIG. 9 shows still another embodiment, in which the ink storage box 1 without the stepped portion 1c of FIG. This is a modified embodiment using an ink storage box 1 inserted into a hole 1a.

In this way, the ink flow mechanism of the present invention can change the marking from bold to fine by appropriately adjusting the shape of the air flow path to the ink storage box and the properties of the ink holder, depending on the flow characteristics of the ink. It can be used in various push-type marking pens, including pens, and has the novel advantage that the ink flow rate can be adjusted to an appropriate condition by adjusting each of these parts.

As is clear from the detailed explanation above,
The present invention is characterized by an improvement to the structure of the conventional push-type marking pen, in which an ink storage box is airtightly connected to a valve mechanism, and air is circulated through the storage box during writing. As a result, the drawbacks of the conventional pen can be solved and the ink can flow out smoothly, and the ink does not overflow to the pen tip and stain the writing surface.

[Brief explanation of the drawing]

The drawings show an embodiment of a marking pen equipped with a valve mechanism according to the present invention.
The figure is a front view of the pen tip in Figure 1, and Figure 3 is a front view of the pen tip in Figure 1.
An end view of the front part of the packing body taken along the - line in the figure,
FIG. 4 is a sectional view of the rear part of the ink storage box taken along the line - in FIG. 7 is a longitudinal sectional view of the main part of the tip of the pen according to the second embodiment, FIG. 7 is a sectional view of the rear part of the ink storage box taken along the line - in FIG. 6, and FIG. FIG. 9, a cross-sectional view of the main part of the pen tip showing a state in which the valve of the pen is in operation, shows yet another embodiment, in which the stepped portion of the ink reservoir in FIG. 1 is not present and the rear end of the pen tip is in the ink holder FIG. 3 is a cross-sectional view of the main part of the tip of the pen, which is in contact with the tip. 1...Ink storage box, 1a...Small hole, 1b...
Rear part of ink storage box, 1c...Stepped portion, 1d...Air hole, 2...Nib body, 3...Ink inlet, 4
... Support rod, 5 ... Packing body, 5a ... Air groove, 6 ... Ink absorber, 7 ... Holder, 8 ...
...Air groove, 9...Ink holder, 10...Valve body,
10a... Valve, 11... Spring, 12... Valve seat, 1
3... Ink storage portion, 14... Ink stirring mass, 15... Shaft cylinder, 16... Gap, A... Valve mechanism, P... Surface such as writing surface.

Claims (1)

[Claims for Utility Model Registration] 1. A marking pen that is equipped with a valve mechanism that opens the valve when the pen tip is pressed and supplies ink to the pen tip body, the rear part of which is airtightly fitted into the front part of the valve mechanism, and which prevents ink flow. An ink storage box with an inlet on the back side that can be moved in the axial direction within the holder in conjunction with the opening and closing of the valve is provided in the holder, and the rear end of the pen tip body is attached to the hole on the front side of the storage box. If necessary, a breathable ink absorber is provided between the rear part of the ink reservoir box and the front part of the valve mechanism, and a gap between the inside of the ink reservoir box and the holder is provided on the sliding surface of the fitting part. 1. A marking pen equipped with a valve mechanism, characterized in that an air flow passage communicating with the marking pen is formed such that the flow passage communicates when writing and is closed when the pen tip is pressed. 2. Utility model registration claim 1, wherein the air flow passage is formed by an air groove recessed in the inner surface of the fitting part of the front part of the valve mechanism with the rear part of the ink storage box. Marking pen with the valve mechanism described. 3. A utility model characterized in that the air flow passage is formed by an air hole bored into the inside of the ink storage box on the side surface of the fitting part with the front part of the valve mechanism at the rear of the ink storage box. A marking pen equipped with the valve mechanism according to claim 1.