Writing device for practice in writing characters

Details Writing device for practice in writing characters Writing device for practice in writing characters

2000-08-08

2002-07-09

Banks, Derris H. (Department: 3712)

Education and demonstration

Means for demonstrating apparatus, product, or surface...

Chalkboard or equivalent means having easily erasable surface

C040S621000, C434S408000, C434S159000

Reexamination Certificate

active

06416329

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a writing device for practice in writing characters with reference to a character model.
BACKGROUND OF THE INVENTION
Young children usually obtain practice in writing characters by repeatedly writing characters on a paper with a pen or pencil with reference to a character model. Particularly in initial stage, the practice is enjoyably performed by easily depicting a character model on a paper with ink stamps respectively having a mark of a character model, or by using a character drill book in which a character model is represented by a dotted line and tracing the character model with a pen or pencil.
Meanwhile, there is known a magnetically writable and erasable writing device. In this device, a microcapsule magnetic sheet is used as a writing sheet so that characters and figures can be freely written on the writing sheet with a magnetic pen having an end made of magnetic material, and the characters and figures written on the top face of the writing sheet can also be erased with an erasing member which has magnetism and is disposed on a back face of the writing sheet.
The theory of the above device will be shortly described as follows. As shown in
FIG. 1
, in a microcapsule magnetic sheet
10
for use in a writing sheet, microcapsules
11
respectively having about the size of 500 &mgr;m in diameter are two-dimensionally arranged between a top sheet
12
and a back sheet
13
. A black magnetic powder
14
having magnetism and a white emulsion
15
are enclosed in each microcapsule
11
. Thus, when magnets
16
,
17
are positioned close to the microcapsule magnet sheet
10
, the black magnetic powder
14
in the microcapsule
11
is magnetically attracted so as to present a black color on one side of the microcapsule magnet sheet
10
to which the magnets
16
,
17
are closely positioned. In contrast, on the other side of the microcapsule magnet sheet
10
, a white color can be presented due to presence of only the white emulsion
15
. Applying this theory of magneticphoresis to the magnetically writable and erasable writing device enables black color characters or figures to be freely written on the front sheet
12
with the magnet
16
. In addition, when the magnet
17
is positioned close to and moved along the back sheet
13
of the microcapsule magnetic sheet
10
, the magnetic powder
14
in the microcapsule
11
is attracted along the track of the magnet
17
toward the back sheet
13
, so that the written characters or figures on the front sheet
12
can be erased.
The magnetically writable and erasable writing device is realized by using this theory. An inner mechanism of the device will be shortly described by taking “Recording Device Using Microcapsule Magnetic Sheet” described in Japanese Patent Application No. Hei 11-81877 filed by the present applicant as an example. As shown in
FIG. 2
, on the outside of a recording device
20
, there are provided a case
21
which is of a rectangular, generally planar shape and formed in the upper section with a rectangular opening
22
. There is also provided a writing sheet
23
comprised of a microcapsule magnetic sheet which is disposed on the case
21
so as to expose a top face of the microcapsule magnetic sheet through the upper opening
22
of the case
21
. A magnetic pen
24
is provided and has a magnet on an end of the magnetic pen. The case
21
is provided with an erasing button
25
on the right lower side of the top surface of the case
21
. As shown in
FIG. 3
, FIG.
4
and
FIG. 5
, within the recording device
20
, there are provided an erasing sheet
26
which is positioned under and in parallel with the writing sheet
23
and which has magnetism, a motor
27
, a battery
28
, a switch
29
, and a driving unit
30
which is connected to the erasing sheet
26
and which is powered by the motor
27
. The driving unit
30
includes an eccentric cam mechanism
31
for creating a horizontally parallel movement of the erasing sheet
26
, and an interlocking device for creating the movement in which the erasing sheet
26
is gotten close to or get away from the writing sheet
23
in conjunction with the horizontally parallel movement of the erasing sheet
26
. The interlocking device comprised of a link mechanism
32
which couples the erasing sheet
26
to the case
21
. The link mechanism
32
is swingable in the direction of the parallel movement of the erasing sheet
26
. The driving unit
30
drives to reciprocate the erasing sheet
26
with keeping the erasing sheet approximately parallel to the writing sheet
23
, from the position (
FIG. 4
) where the erasing sheet
26
is far enough from the writing sheet
23
so that the magnetic force of the erasing sheet
26
will not erase the written characters and figures on the writing sheet
23
, to the position (
FIG. 5
) where the erasing sheet
26
is close enough to the writing sheet
23
so that the magnetic force of the erasing sheet
26
may erase the characters and figures on the writing sheet
23
. When the erasing button
25
is pressed down, the switch
29
is turned on to start supplying an electric power from the batteries
28
to the motor
27
, and the erasing sheet
26
is then started to move by the driving unit
30
. The switch is kept in ON state until the eccentric cam
31
is gone into a 360-degree rotation by the erasing sheet
26
which is moving, and, that is, the erasing sheet
26
finishes one cycle of reciprocating motion. When the erasing sheet
26
finishes one cycle of reciprocating motion, the switch is turned off to automatically stop the motor
27
, and one cycle of erasing motion is now completed. In other word, a learner can erase character or figures written on the writing sheet
23
in a lump simply by pressing the erasing button
25
on the top surface of the case
21
.
When repeatedly writing characters on a paper with a pen or pencil with reference to a character model, or depicting a character model on a paper with ink stamps respectively having a mark of character model, or using a character drill book in which a character model is represented by a dotted line and tracing the character model with a pen or pencil, as described above, there are problems that it is required to appropriately supplement consumable supplies, such as a pen and pencil, a paper, a drill book in which a character model is represented by a dotted line, and an ink, and also surroundings, such as hands, a cloth, and a desk and wall, may be stained by the pencil or pen, and the ink of the ink stamp.
Thus, it may be appreciated to apply the aforementioned magnetically writable and erasable writing device, which enables to repeatedly writing any characters and figures and also enables to erase the written characters and figures without consuming writing tools, papers and the like, and without staining hands, clothes and the like, as a writing device for practice in writing characters.
However, heretofore in the practice in writing characters, there has been a problem that it has been necessary to prepare a referential character model in addition to the writing device and to place it in an appropriate position during the practice. Additionally, it has been necessary to store the referential character model not to be lost after the practice. This problem cannot be solved even if the magnetically writable and erasable writing device is applied. Besides, when the magnetically writable and erasable writing device is applied, the conventional ink stamps cannot jointly be used. Even assuming that the conventional ink stamps may be used, an extra space has been needed to store the ink stamps because they are bulky although a necessary stamping face is provided only on one side of each ink stamp, which would cause a problem. Further, when the magnetically writable and readable writing device is applied, if the a character model represented by dotted line similar to the conventional drill book is to be provided on the writing sheet of the writing device, the writing device should be fairly enlarged and o

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