JPH0712057Y2 - Magnetic pen for magnetic drawing sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a magnetic pen used for a magnetic drawing sheet in which characters and pictures can be freely written by magnetic force and easily erased.

[Prior Art] First, a magnetic drawing sheet will be described with reference to FIG. This sheet a is obtained by coating the back surface of a sheet-shaped base material b with microcapsules d of about 100 μm in diameter containing metal scale c having a diameter of 4 to 5 μm together with a liquid and coating the back surface with a coating material. When the magnet e is brought close to a, the direction of the metal scale c changes in the direction of the magnetic force line. Then, in the portion of the vertical magnetic field, the metallic scale c stands up and the portion absorbs light, so that it looks black. Further, in the portion of the transverse magnetic field such as near the center of the magnet e, the metal scale c is laterally reflected and reflects light, so that it looks yellow.

However, once the magnetic drawing sheet a has changed its direction as described above, it keeps its direction until a magnetic field in the other direction is applied next. c is in the horizontal direction and a yellow line can be drawn.

[Problems to be Solved by the Invention] However, the conventional magnetic pen using a mere magnet has a problem in that the lines drawn on the drawing sheet cannot be erased cleanly.

[Object and Structure of the Invention] An object of the present invention is to solve the above problems and provide a magnetic pen for a sheet having an erasing function.
A tapered conical portion is integrally formed at one end of the rod-shaped body, and the entire length of the body is linearly magnetized so that the N pole and the S pole are adjacent to each other in the width direction. It is characterized in that both the N pole and the S pole are exposed.

[Operation] By contacting the body of the magnetic pen on the magnetic drawing sheet and sliding the magnetic pen in the width direction, linear N and S poles are magnetized over the entire length of the body. It is possible to stand up the metal scales of the magnetic drawing sheet in a uniform manner and erase them neatly without leaving unnecessary lines.

[Embodiment] Next, an embodiment of the magnetic pen for a magnetic drawing sheet according to the present invention will be described with reference to the drawings (FIGS. 1 to 5).

This magnetic pen has a plate-shaped rubber magnet 2 over the entire half-cut surface of a half-cut hexagonal column-shaped handle 1 made of wood or plastic.
Is attached, and a tapered conical portion 3 is integrally formed at one end thereof. Body part 5 excluding the tip part 4 of the rubber magnet 2
The entire length is linearly magnetized so that the N pole and the S pole are adjacent to each other in the width direction. As the magnetization method, as shown in FIG. 3, depending on the direction of the magnetic force lines for magnetization, single-sided magnetization in which N poles and S poles are alternately magnetized in the width direction only on one side, and as shown in FIG. There is double-sided magnetization in which opposite poles are magnetized on the opposite side. On the other hand, the tip portion 4 of the rubber magnet 2 which overlaps with the conical portion 3 is magnetized to have the N pole on the surface and the S pole on the overlapping surface as shown in FIG. The north pole of the tip is facing each other.

In the magnetic pen for a magnetic drawing sheet configured as described above, a desired line, character or the like can be drawn by sliding the tip of the tip portion 4 on the surface of the magnetic drawing sheet a. Further, when erasing it, if the rubber magnet 2 is applied to the surface of the magnetic drawing sheet a and the magnetic pen is slid in the width direction, the magnetic property is generated as the line-shaped N pole and S pole pass alternately. The metal scales c in the drawing sheet a change their orientation in the vertical and horizontal directions according to the change of the magnetic field, and after the rubber magnets 2 pass through, a large number of metal scales c.
The lines, characters, and the like drawn on the sheet a can be completely erased because the directions of are aligned neatly.

A magnetic pen for a magnetic drawing sheet according to another embodiment of the present invention shown in FIGS. 6 to 10 is integrally formed of a hard resin containing a magnetic material, and its body portion 5 is It is composed of a wide plate portion 5a and a round rod portion 5b, and a conical portion 3 is formed at the tip of the round rod portion 5b. The entire length of the body portion 5 is linearly magnetized so that the N pole and the S pole are adjacent to each other in the width direction, and the conical portion 3 is magnetized with the N pole on the half of the longitudinal section and the S pole on the back side. To do. In the magnetic pen integrally formed of the magnetic material as described above, desired portions can be magnetized as desired. And torso 5
The same erasure can be performed by sliding on the magnetic drawing sheet a.

[Advantages of the Invention] As described in the above embodiments, according to the magnetic pen for a magnetic drawing sheet of the present invention, the linear N-pole and S-pole magnetized over the entire length of the body are metallic scales of the magnetic drawing sheet. The effect is that you can move to the uniform and clean out unnecessary lines.

[Brief description of drawings]

FIG. 1 shows an embodiment of a magnetic pen for a magnetic drawing sheet according to the present invention. FIG. 1 is a perspective view, FIG. 2 is a perspective view showing magnetization of the back surface thereof, FIG. 3, FIG. FIG. 5 is a perspective view showing a magnetizing method, FIG. 6 is a perspective view showing another embodiment, FIG. 7 is a front view showing the magnetized state, and FIG. FIG. 9 is a diagram showing the magnetization state of the XX cross section, FIG. 9 is a diagram showing the magnetization state of the YY cross section of FIG. 7, and FIG. 10 is the magnetization of the ZZ cross section of FIG. FIG. 11 is a diagram showing the state, and FIG. 11 is an explanatory diagram of the magnetic drawing sheet. 3 ... cone part, 5 ... body part.

Claims (1)

[Scope of utility model registration request] 1. A rod-shaped body part is integrally formed with a tapered conical part, and the whole length of the body part is linearly magnetized so that N poles and S poles are adjacent to each other in the width direction. A magnetic pen for a magnetic drawing sheet, characterized in that the conical portion has both the N pole and the S pole exposed at the tip.