JPH0242468Y2 - - Google Patents

Description

[Detailed description of the invention] "Purpose of the invention""Field of industrial application" The present invention relates to a slippage prevention device for a writing and drawing tool.

"Prior Art" A conventional ratio wire drawing tool was constructed as shown in FIG. That is, the outer cylinder 1 is formed into a cylindrical shape having three different diameters, with the uppermost stage being the ink reservoir part 2 with the largest diameter, the middle stage being the operating part 3 having an intermediate diameter, and the lower stage being the writing part 4 having a smaller diameter. The ink reservoir section 2 is open at the top and has a tapered section 5 on its inner surface connected to the actuating section 3 to allow ink to flow down smoothly.
A stepped portion 6 is provided on the outside of the holder. Further, the connection portion between the inner surface of the actuating portion 3 and the flow hole 7, which is the inner surface of the writing portion 4, is also formed into a tapered shape to constitute an ink stop portion 8. The outer diameter of the writing portion 4 is set to a diameter necessary to draw a predetermined thickness.

On the other hand, the ink flow stopper 9 is adapted to be inserted into the outer cylinder 1. That is, there is a flow hole 7 at the lower end.
A needle part 10 is provided inside the writing part 4 so that the end thereof protrudes from the writing part 4, and a tapered flow-down part is provided on the upper surface of the needle part to abut the ink stop part 8 and prevent the ink from flowing down. A flow prevention part 12 provided with a prevention surface 11 is located inside the actuating part 3 with a gap therebetween, and a weight 14 is connected to the upper surface of the flow prevention part 12 via a connecting rod 13 having a small diameter.

In the conventional wire drawing tool, when the ink reservoir 2 is filled with ink, surface tension prevents the ink from leaking to the outside. The weight of the weight 14 and the flow prevention part 12 causes the flow prevention surface 11 to come into contact with the ink stop part 8 to prevent the ink from flowing down.

When writing or drawing in this state, as shown in FIG. 4, the outer periphery of the actuating part 3 is gripped and held by a gripping part 17 pivotally connected to a holding member 16 attached to the tip of the pen shaft 15. Presser foot 1 provided integrally with gripping portion 17
8 to press the head of the weight 14 and remove the ink flow stopper 9
I'm trying to prevent it from coming out.

When drawing an arc, attach the attachment 2 to one leg 20 of the compass 19 as shown in FIG.
1, and this attachment 21 connects the actuating part 3.
It is designed to make you grasp and hold.

When writing or drawing with the pen shaft 15 or compass 19, when the needle part 10 comes into contact with the paper surface, the ink flow stopper 9 rises, and the flow prevention surface 11 separates from the ink stopper part 8. The ink is now able to flow down, and the ink flows down inside the flow hole 7 to draw characters or lines having a thickness that corresponds to the outer diameter of the writing section 4.

``Problems to be Solved by the Invention'' Since the needle part 10 of the above-mentioned line drawing tool for drawing thin lines is very thin, when the ink flow stopper 9 is removed from the outer cylinder 1, the needle part 10
Since an accident occurred where the ink flow stopper 9 could not be inserted again due to bending, a U-shaped clip 22 was fitted to the outer wall of the ink reservoir 2 to prevent the ink flow stopper 9 from falling out when the ink flow stopper 9 was reversed. .

However, since the clip 22 is located within the ink, there is a drawback that the ink leaks to the outside due to capillary action.

Further, in the case of drawing a thick line, the needle portion 10 becomes thicker, so the total weight of the ink flow stopper 9 increases, and the clip 22 cannot prevent the ink flow stopper 9 from coming off. Therefore, when the ink flow stopper 9 is reversed, the ink flow stopper 9 comes out.
The ink loses its surface tension and flows out from the ink reservoir 2, causing an accident that stains the paper surface.

Therefore, in the present invention, the ink is prevented from leaking to the outside due to capillary phenomenon, and vice versa, the ink is prevented from flowing out.

``Structure of the invention'' ``Means for solving the problem'' The present invention consists of a cylindrical outer cylinder with a large-diameter ink reservoir in the upper stage, an intermediate-diameter operating part in the middle, and a small-diameter writing part in the lower stage. Inside, an ink flow stopper is provided with a weight, a connecting rod with a small diameter, a flow prevention part, and a needle part in order from the top. In a writing/drawing tool inserted so as to abut the tapered ink stop part, a fall prevention part is formed at one end of the insertion groove into which the connecting rod is inserted, and a drop prevention part is formed at the other end of the insertion groove from the inner diameter of the ink reservoir part. An arc-shaped fixing part with a large diameter is provided on the outside of the fall prevention part, and a fall prevention member formed by providing upwardly protruding legs on the fixing part is elastically brought into contact with the inner surface of the ink reservoir part. It is fitted and fixed like this.

Embodiment The present invention will be described in detail with reference to FIGS. 1 and 2. A fall prevention member 30 is fitted into the ink reservoir 2 to prevent the ink flow stopper 9 from coming off.

As shown in FIG. 2, the fall prevention member 30 is formed by bending an elastic steel material such as piano wire. That is, the connecting rod 13 of the ink flow stopper 9
An insertion groove 31 with a width that allows the ink to pass through is provided, an arcuate drop prevention part 32 having a diameter smaller than the outer diameter of the flow prevention part 12 is provided in one of the insertion grooves 31, and an ink drop prevention part 32 is provided in the other of the insertion groove 31. Arc-shaped fixing parts 33, 33' having a diameter larger than the inner diameter of the reservoir part 2 are provided on the outside of the fall prevention part 32, and these fixing parts 33, 33'
The legs 34, 34' are formed by bending both open ends upward.

The fall prevention member 30 configured as described above is
As shown in the figure, the diameter of the fixing parts 33, 33' is reduced by holding both legs 34, 34' and pressing them inward, and the connecting rod 13 is passed through the insertion groove 31, and the whole is inserted into the ink reservoir part 2. When the ink is inserted until it is locked in the tapered part 5, and then the legs 34, 34' are separated, the diameter of the fixing parts 33, 33' expands, and they are strongly pressed against the inside of the ink reservoir part 2 by elasticity and are fixed.

Since everything else is the same as the conventional one, the same reference numerals are given and the explanation will be omitted.

"Operation" This embodiment is configured as described above, and the fourth
In the state shown in the figure, when the ink reservoir section 2 is filled with ink, the ink passes between the flow prevention section 12 and the actuating section 3 through the gaps between the fixed parts 33, 33' of the fall prevention member 30, the fall prevention section 32, etc. The ink flows into the ink, and the contact between the flow prevention surface 11 and the ink stop portion 8 creates a sealed state, thereby preventing ink from flowing out.

When writing or drawing, as in the past, the ink flow stopper 9 is raised by bringing the needle 10 into contact with the paper surface, and a gap is formed in the flow prevention surface 11 to allow the ink to flow down to a predetermined position. Draw the letters, etc.

Further, when the ink flow stopper 9 is held upside down, the ink flow stopper 9 moves, but the flow prevention part 12 comes into contact with the fall prevention part 32 of the fall prevention member 30, and the ink flow stopper 9 is prevented from falling off. Also, the ink is prevented from flowing out due to surface tension.

In the above embodiment, it was explained that the arc-shaped fall prevention part 32 is formed following the insertion groove 31 of the fall prevention member 30, but this
3 and 33', and may be formed in a U-shape following the insertion groove 31. In short, it is sufficient as long as it can engage with the upper surface of the flow prevention part 12. .

Furthermore, although the fall prevention member 30 has been described as being formed from piano wire, it may also be manufactured by punching out a plate material.

"Effects of the Invention" The present invention has the above-described structure and operation, and the fall prevention member 30 is strongly fixed to the ink reservoir part 2 by the elasticity that tends to spread to both sides of the fixing parts 33 and 33'. .

Also, since both legs 34 and 34' are made to protrude,
Since the legs 34, 34' can be held while inserting and removing the ink reservoir 2, the insertion and removal work can be easily performed.

Furthermore, since the fall prevention member 30 is firmly fixed, it can completely prevent the ink flow stopper 9 from slipping out when the ink flow stopper 9 is reversed, and the ink can be reliably prevented from flowing out.

[Brief explanation of the drawing]

Fig. 1 is an enlarged sectional view of one embodiment of the slip-out prevention device in the writing/drawing tool according to the present invention, Fig. 2 is an enlarged perspective view of the fall prevention member, and Fig. 3 is an enlarged view of the conventional drawing/writing/drawing tool. FIG. 4 is an enlarged longitudinal sectional view, FIG. 4 is an enlarged side view when attached to a pen shaft, and FIG. 5 is an actual-size perspective view when attached to a compass. 1 is an outer cylinder, 2 is an ink reservoir part, 3 is an operating part, 4 is a writing part, 8 is an ink stop part, 9 is an ink flow stopper, 10 is a needle part, 12 is a flow prevention part, 13 is a connecting rod, 14 is a weight, 30 is a fall prevention member, 33,3
3' is a fixed part, and 34, 34' are legs.

Claims (1)

[Scope of utility model registration request] Inside a cylindrical outer cylinder 1, which has a large diameter ink reservoir part 2 in the upper stage, an intermediate diameter operating part 3 in the middle stage, and a small diameter writing part 4 in the lower stage, a weight 14 and a connecting rod 13 with a small diameter are placed in order from the top. , the ink flow stopper 9 provided with a flow prevention part 12 and a needle part 10 is inserted into the writing part 4 so that the needle part 10 is inserted into the writing part 4 and the flow prevention part 12 is inserted into the actuating part 3 so that the lower surface thereof is tapered at the lower end of the actuating part 3. In the writing/drawing tool inserted so as to come into contact with the ink stop part 8, a fall prevention part 32 is formed at one end of the insertion groove 31 into which the connecting rod 13 is inserted, and an ink reservoir part 2 is formed at the other end of the insertion groove 31. An arc-shaped fixing part 3 whose diameter is larger than the inner diameter of
3 and 33' are provided on the outside of the fall prevention part 32, and the fixing parts 33 and 33' are provided with legs 34 and 34' that protrude upward.
A slip-off prevention device formed by fitting and fixing fixing parts 33, 33' so as to elastically abut on the inner surface of the.