JPS6140197B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a writing instrument using a powder core.

(Prior art and its problems) Conventional pencils have solid cores in the form of thin rods, and the cores often break during use, or gradually become thicker and become difficult to write with. It is troublesome that you cannot use it without it, and you are forced to waste a lot of money because you cannot use it to the end.

On the other hand, in the case of a mechanical pencil in which fine leads are dispensed in advance one after another, the pencil must be manually dispensed each time the number of leads decreases, which is troublesome.

(Means for Solving the Problems) The present invention has been researched to solve these drawbacks, and involves dropping powder cores one after another and rubbing them against paper, etc., which results in a continuous process. It is made available for use.

The present invention will be described in detail with reference to the illustrated embodiment. First, a mandrel 15 is provided which has a thin magnetic body 16 in the shape of a bar magnet embedded in its tip and protrudes. and provide a 15" male screw on the top.

On the other hand, a fixing rod 9 is provided which is slightly tapered toward the top.
A plurality of falling grooves 10 are provided around the fixing rod 9, and the grooves 10 are gradually deepened upward.
At the center of the lower end surface is provided a female screw 9' into which the screw 15'' is screwed.

Furthermore, there is a center hole 17 through which the male screw 15'' can pass.
and a plurality of drop ports 18 around the center hole 17,
A connecting frame 12 having a perforated plate 19 provided with holes 18 is provided, and male screws 13,
13 are provided.

The mandrel 15, the fixed rod 9, and the connecting frame 12 are connected to each other by passing the male thread 15'' of the mandrel 15 through the center hole 17 of the connecting frame 12 and tightening it to the female thread 9' of the fixed rod 9. A porous plate 19 is sandwiched between the step 15' and the lower end surface of the fixing rod 9 to connect them to each other.The shaft 15 other than the magnetic body 16, the fixing rod 9, and the connecting frame 12 may be integrally molded.

The female screw 14' of the base 14 is screwed into the lower male screw 13' of the connecting frame 12, and the tip of the magnetic body 16 is slightly exposed with a gap from the tip of the base 14.
The inner thread 11 of the outer cylinder 7 is screwed and fixed to the upper female thread 13 of the connecting frame 12, and the outer cylinder 7 houses a container 5 containing a powder core 6 made of a mixture of magnetically attachable metal powder and carbon powder. the lower end surface 5' of the container 5 with the fixing rod 9
The powder core 6 is made to fall freely along the falling groove 10 of the fixing rod 10 by piercing it.

The upper end of the outer cylinder 7 is an eraser 4 with a belt 3 wrapped around it.
The eraser 4 is covered with the cap 1. 2 in the figure is a clip. 8 is a tank portion formed by the lower part of the outer cylinder 7 and the connecting frame 12.

The metal powder that makes up the powder core 6 has excellent rust resistance.
The carbon powder used is graphite powder, and graphite powder and metal powder are used to obtain the appropriate color tone for writing.
A suitable density can be obtained by mixing at a blending ratio of 80:20 or at any other suitable ratio.

Although it is desirable to use a fine powder with a size of about 50 to 300 meshes, it is possible to use a powder with a size outside the above range depending on the purpose of use.

Also, although the container 5 is a spare type, the powder core 6
It is also possible to replenish only the water.

(Function) The present invention is embodied as described above, and when using it, it is sufficient to hold it in the same way as a normal pencil, but by applying the tip of the magnetic body 16 to the paper surface with appropriate writing pressure (about 200 g). By rubbing, the powder core adhering to the tip of the magnetic body 16 is rubbed and smeared onto the paper surface, allowing writing. At the beginning of writing, if the powder core 6 is shaken up and down, it will fall and be attracted to the tip of the magnetic body 16.

When the powder core 6 at the tip of the magnetic body 16 disappears, the outer cylinder 7
The inner powder core 6 has a tank part 8, a drop hole 18, and a cap 14.
The magnetic material 16 falls one after another and is replenished and attracted to the tip of the magnetic body 16, allowing continuous writing.

The gap between the magnetic body 16 and the cap 14 depends on the magnetic force of the magnetic body 16, the particle size of the powder core 6, the protrusion dimension of the tip of the magnetic body 16 from the tip of the cap 14, and the mandrel 1.
5. Optimum conditions may be selected and determined based on relative relationships such as the degree of slight vibration caused by writing on the fixed rod 9.

(Effects) As described above, in the present invention, the magnetic body 16, the mandrel 15, and the fixed rod 9 are integrally fixed, so that due to the slight vibrations applied to the tip of the magnetic body 16 due to writing and the movement of the entire body, The powder core 6 inside the outer cylinder is vibrated to encourage the powder core to fall, and to prevent the powder core from agglomerating or solidifying. You can write smoothly without any interruptions.

In addition, unlike conventional pencils, the lead does not break, become thinner and thicker, and there is no need to sharpen it, so writing can be done efficiently, and there is no waste because it does not become too short and need to be thrown away.

Also, unlike a sharp pencil, there is no need to feed out the lead, so you can stop writing.

Also, after writing, you can easily erase it using an eraser.

Furthermore, it has excellent features such as being able to be used like a colored pencil by purposefully changing the pigment in the powder core 6.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional perspective view of a writing instrument according to the present invention, and FIG. 2 is a three-dimensional view thereof. 4 is an eraser, 5 is a container, 6 is a powder core, 7 is an outer cylinder, 9 is a fixing rod, 10 is a drop groove, 12 is a connecting frame,
14 is a cap, 15 is a core, and 16 is a magnetic body.

Claims (1)

[Claims] 1 A mandrel 15 provided with a magnetic body 16 at the tip and a fixing rod 9 provided with a falling groove 10 around the upper part are connected to a connecting frame 12.
are fixed to each other through a perforated plate, a cap is attached to the bottom of the connecting frame so that the tip of the magnetic body is exposed from the cap, and an outer cylinder is fixed to the top of the connecting frame and magnetically attached inside the outer cylinder. A powder core made of a mixture of free metal powder and carbon powder or other pigment powder is stored, and the powder core is allowed to fall freely into the connecting frame along the falling groove of the fixed rod,
A writing instrument with a lid on the tip of the outer tube.