JP3624137B2 - Magnet blackboard - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a blackboard using a magnet pen that can draw a character or picture with a magnet pen having a magnet at the tip, or redraw the drawn letter or picture after so-called partial erasure.
[0002]
[Prior art]
A conventionally known magnet pen-based blackboard is a form that erases all the characters and pictures drawn on the drawing board at once by moving a long magnet-mounted slide cage arranged on the back of the drawing board, There was a fatal defect that operations such as consciously erasing a drawn character or a narrow part of a picture and redrawing the part could not be performed.
[0003]
[Problems to be solved by the invention]
An object of the present invention is to provide a novel blackboard using a magnet pen that eliminates the above-mentioned defects.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, the blackboard using a magnetic pen according to the present invention has a pen tip receiving portion on the upper side of the drawing board, and an erasing magnet having a magnetic force larger than that of the magnet pen on the lower side along the drawing board. The pen tip receiving portion and the erasing magnet are integrally connected through an auxiliary member or the like so as to be movable.
[0005]
Alternatively, the knob portion is arranged on the upper side of the drawing board, and the erasing magnet is arranged on the lower side so as to be movable along the drawing board. The knob portion and the erasing magnet can be integrally moved via an auxiliary member or the like. They are connected in a state.
[0006]
【Example】
In the embodiment shown in the figure, the upper and lower rigid synthetic resin transparent plates 1 and 2 are partitioned by a partition 3 to form a plurality of small chambers 4 and the iron sand 5 is dispersed in each of the small chambers 4. The drawing board 7 is formed by sealing the white opaque liquid 6 in a state where the powdery magnetic body is movable under the magnetic force.
[0007]
Separately from this, with a hard synthetic resin material, a rectangular hand-side recess 9 with the front surface and the upper surface open and a square front-side recess 10 with only the upper surface open on the top surface. A base plate 11 is formed, a shallow concave portion 12 is provided in the center of the bottom surface of the concave portion 9 on the hand side, and the drawing board 7 is fitted in the shallow concave portion 12 so as not to be displaced. A blackboard main body 13 is constructed in which the drawing board 7 is stretched so that it cannot be pulled out at the bottom of the recess 9, and a long card slot 14 is opened on the front wall of the front recess 10 on the left and right. A large number of cards 15 are stored in the same-side recess 10 through the entrance / exit 14, thereby forming the interchangeable display window 16.
[0008]
In addition, separately from these, a half-folded auxiliary member 18 is formed with a hard synthetic resin material, and an inner round bottom dish-shaped pen-tip receiving portion 21 is similarly attached to the tip of the upper side portion 20 of this auxiliary member 18. A circular dish-like portion 23 that opens upward at the tip of 22 is provided in such a state that the pen tip receiving portion 21 and the circular dish-like portion 23 correspond to each other, and the dish-like portion 23 is erased. A disc-shaped ferrite magnet 24 is fitted, and a long moving slit 25 is opened on the left and right walls of the proximal recess 9, and the upper side portion 20 of the auxiliary member 18 extends from the back side of the moving slit 25. Are inserted so that the upper side portion 20 and the pen tip receiving portion 21 are movable along the upper surface of the drawing board 7, and the lower side portion 22 and the ferrite magnet 24 are movable along the lower surface of the bottom portion of the hand side recess 9.
[0009]
In addition, separately from these, a granular magnet 27 smaller than the erasing disk-shaped ferrite magnet 24 and having a weak magnetic force is attached to the tip of a rod-shaped body 26 made of a hard synthetic resin material, and a magnet pen for drawing characters and pictures. 28, and when the granular magnet 27 of the drawing magnet pen 28 is lightly applied to the upper surface of the drawing board 7 and is arbitrarily moved, desired characters and pictures are drawn on the drawing board 7. It is.
[0010]
In the figure, reference numeral 30 is a holder portion of the drawing magnet pen 28, and 31 is an elastic leg for raising the disc-shaped ferrite magnet 24 to increase the reliability of its function.
[0011]
[Action]
That is, in the above description, when the pen tip (granular magnet 27) of the drawing magnet pen 28 is applied to the upper surface of the drawing board 7 and moved, the iron sand 5 in the small chamber 4 existing at the moving portion is attracted to the top surface. The small chamber 4 is changed to black so that a handwriting appears, and the drawing magnet pen 28 is inserted in the pen tip receiving portion 22 so that, for example, the drawing magnet pen 28 is erased. When moved partly or entirely, the dish-shaped portion 23 and the disc-shaped ferrite magnet 24 also move together through the auxiliary member 18, and the sand iron 5 adsorbed on the top surface of the small chamber 4 existing at the moving position is moved. The handwriting is erased by adhering to the bottom surface of the small chamber 4 and discoloring the top surface of the small chamber 4 to white. I was able to It is.
[0012]
In the present invention, a finger operation knob in the shape or color of an infant's favorite character is provided side by side with the pen tip receiving portion, or alternatively, the finger can be moved without using a magnetic pen, or the replaceable display window 16 is pre- It is possible to store a sample card for drawing on the blackboard main body 13 so that even a small child can easily imitate and play, and such modifications or modifications that do not depart from the spirit of the present invention Alternatively, the present invention naturally extends.
[0013]
【The invention's effect】
The blackboard using the magnet pen according to claim 1 moves the eraser magnet having a magnetic force larger than the magnet of the magnet pen on the upper side of the drawing board and the lower side of the drawing board as described above. Since the pen tip receiving part and the erasing magnet are integrally connected via the auxiliary member etc. in the above-described movable state, the pen tip of the drawing magnet pen is placed in the pen tip receiving part. A part of the handwriting can be erased by moving the drawing magnet pen to, for example, a part of the character or picture to be erased in the inserted state. As described above, the knob part is arranged on the upper side of the drawing board, and the erasing magnet is arranged on the lower side so as to be movable along the drawing board. The knob part and the erasing magnet are moved together through the auxiliary member etc. Because it is connected in a possible state, You can erase part of the handwriting by moving it to the part of the character or picture you want to erase by operating with your fingers, and it has the remarkable effect of completely achieving the intended purpose Is.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of a magnet pen type blackboard according to the present invention.
FIG. 2 is a cross-sectional view taken along line AA.
FIG. 3 is a perspective view showing an auxiliary member.
FIG. 4 is an enlarged cross-sectional view showing a state where the tip of the magnet pen has moved on the upper surface of the small chamber.
FIG. 5 is an enlarged cross-sectional view showing a state in which the ferrite magnet has moved on the lower surface of the small chamber.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Hard synthetic resin transparent board 2 Hard synthetic resin transparent board 3 Partition 4 Komuro 5 Sand iron 6 Opaque liquid 7 Drawing board 9 Hand side recessed part 10 Front side recessed part 11 Base 12 Shallow recessed part 13 Blackboard main-body part 14 Card slot 15 Card 16 Display window 18 Auxiliary member 20 Upper side portion 21 Pen tip receiving portion 22 Lower side portion 23 Circular dish-like portion 24 Ferrite magnet 25 Moving slit 26 Rod-like body 27 Granular magnet 28 Drawing magnet pen 30 Holder portion 31 Elastic leg

Claims (2)

An erasing magnet with a magnetic force larger than that of the magnet pen magnet is arranged on the upper side of the drawing board so that it can move along the drawing board. A blackboard using a magnet pen, which is integrally connected through an auxiliary member or the like so as to be movable. The knob part on the upper side of the drawing board is also arranged on the lower side so that the erasing magnet can be moved along the drawing board. The knob part and the erasing magnet can be integrally moved through the auxiliary member etc. A magnet-type blackboard characterized by being connected.

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