JP3068611U - Magnetic pen for magnetic picture board - Google Patents

Abstract

(57) [Summary] [Problem] To provide a magnetic pen which can always draw a beautiful drawing line even when the pen body 1 is held at an angle, and has a simple structure. Kind Code: A1 A pen is provided on a magnetic picture plate for drawing on a plate surface and has the following requirements. (A) A pen tip made of a magnet is fixed to one end of a pen body. (C) The pen tip 2 is formed in a spherical shape. (D) The tip surface of the pen body 1 and the base 4 of the pen tip 2 are joined.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a magnetic pen provided for a magnetic picture plate.

[0002]

[Prior art and its problems]

 Conventionally, as shown in FIG. 5, this type of magnetic pen has a pen tip 11 protruding from the tip of a pen body 10, so that the magnetic pen is used in an upright state with respect to the magnetic picture plate 12. Sometimes, a beautiful line can be drawn, but if the magnetic pen is used at an angle as shown by the dashed line, the corner 13 on the lower surface of the pen body 10 hits the surface of the magnetic drawing plate 12, so the drawing line is blurred. There was a problem that it would. Further, the pen tip 11 is relatively small, and since the infant tries to draw by pressing the magnetic pen strongly on the drawing board 12, the surface of the magnetic drawing board 12 may be dented, damaged or damaged. In this way, it is very difficult for an infant who does not know how to draw, to hold the magnetic pen correctly, draw at the correct angle, and remove excess force. I easily traced the surface of the drawing board and it was difficult to draw well.

[0003]

[Problems to be solved by the invention]

 SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide a magnetic pen which can always draw a beautiful drawing line even when the pen body is held diagonally and has a simple structure.

[0004]

[Problems to be solved by the invention]

 In order to solve the above problems, a magnetic pen according to the present invention is provided on a magnetic plate for drawing on a plate surface, and has the following requirements. (B) A pen tip made of a magnet is fixed to one end of the pen body. (B) The end of the pen body is tapered. (C) The pen tip is formed in a spherical shape, and its base is It must be approximately the same size as the tip surface of the pen body. (D) The tip surface of the pen body must be joined to the base of the pen tip.

Preferably, a fitting hole is formed in the center of the tip end surface of the pen body, and a mounting shaft formed at the center of the base of the pen tip is press-fitted into the fitting hole.

It is preferable that at least the grip portion of the pen body is formed in a substantially triangular cross section.

[0007]

[Embodiment of the invention]

 In FIG. 1, reference symbol A indicates a magnetic pen. The magnetic pen A includes a pen body 1 and a pen tip 2. The pen body 1 is made of a synthetic resin. One end of the pen body 1 is tapered as shown in FIG. 2, and a tip end surface 1a is formed in a flat shape. A circular fitting hole 3 is formed at the center of the tip end surface 1a. Is formed. On the other hand, the pen tip 2 is made of a magnet and is formed in a spherical shape, and its base 4 is formed in a planar shape. A mounting shaft 5 projects from the center of the base 4. The surface of the mounting shaft 5 is subjected to a knurling process as shown in the figure to prevent it from coming off. The tip surface 1a of the pen body 1 and the base 4 of the pen tip 2 are substantially the same size.

Next, a mounting shaft 5 formed at the center of the base 4 of the pen tip 2 is press-fitted into the fitting hole 3 of the pen body 1, and the tip end surface of the pen body 1 and the base 4 of the pen tip 2 are joined. doing. In order to fix the pen tip 2, an appropriate fixing means such as an adhesive or a fixing pin may be used.

[0009] At least the grip 6 (or the whole) of the pen body 1 is formed in a substantially triangular cross section. The pen body 1 is formed to have a size inscribed in a circle having a diameter of approximately 16 mm to 22 mm.

As shown in FIG. 3, when the surface of the magnetic plate 7 is traced with the magnetic pen having the above-described configuration, the magnetic particles 9 of the cell 8 in the traced portion are attracted by the magnetic force of the pen tip 2 of the magnetic pen A. The surface of the magnetic particles 9 appears near the surface, and the color of the magnetic particles 9 appears on the surface of the image plate and is expressed as a drawing line. By the way, the thickness of the drawing line is determined by the degree of contact of the tip drawing portion of the pen tip 2 of the magnetic pen with the surface of the drawing board 7, but since the pen tip 2 has a spherical shape, it does not matter which part is contacted. The degree of contact with the surface of the drawing board 7 does not change. Therefore, even if the pen body 1 is drawn upright with respect to the surface of the magnetic picture plate 7, the drawing does not occur even if it is slanted, and a drawing line having the same thickness can always be drawn.

In addition, the pen tip of the conventional magnetic pen is larger than the pen tip of the conventional magnetic pen, and the tip is formed in a large spherical shape. Therefore, the writing pressure on the magnetic plate 7 is reduced, and the magnetic plate 7 is damaged or damaged. It becomes difficult to do.

Further, since the tip end surface of the pen body 1 and the base 4 of the pen tip 2 are the same size and are joined to each other, the tip end surface of the pen body 1 protrudes from the base 4 of the pen tip 2. There is nothing. For this reason, even if the magnetic pen is held at an angle during drawing, the corner of the tip surface of the pen body 1 hardly hits the surface of the magnetic image plate 7. By forming the pen tip 2 as shown in FIG. 4, the possibility that the pen body 1 hits the surface of the magnetic image plate 7 is further reduced.

Further, since the base 4 of the pen tip 2 and the tip end surface of the pen body 1 do not protrude, the surface of the pen tip 2 smoothly continues to the surface of the pen body 1. There is no inconvenience such that the pen 4 is caught by something and comes off the pen body 1.

In addition, since the grip portion 6 of the pen body 1 is formed to have a substantially triangular cross section, the infant naturally holds the magnetic pen between the thumb, the forefinger, and the middle finger when gripping. . This is because it is the easiest to hold. Therefore, the infant can learn without knowing how to hold the pen. In this case, the pen body 1 is formed so as to have a size inscribed in a circle having a diameter of approximately 16 mm to 22 mm, so that the gripping state is optimal for an infant or child of about 3 to 5 years old. By the way, the result was that 19mm was the best for a 2 year old.

The pen tip 2 may be attached to both ends of the pen body 1.

[0016]

[Effect of the invention]

 According to the first aspect of the present invention, since the pen tip is spherical, the degree of contact with the surface of the drawing plate does not change regardless of which part is brought into contact. Therefore, even if the pen body is drawn upright with respect to the surface of the magnetic picture plate, no obliqueness occurs when the pen body is inclined, and a drawing line having the same thickness can always be drawn. In addition, the pen tip of the conventional magnetic pen is larger than the pen tip of the conventional magnetic pen, and the tip is formed in a large spherical shape, so that the writing pressure on the magnetic plate is reduced, and the magnetic plate is less likely to be damaged or damaged. Furthermore, since the structure is simple, it can be provided at low cost.

In addition, since the tip surface of the pen body and the base of the pen tip are substantially the same size and are in contact with each other, the tip surface of the pen body hardly protrudes from the base of the pen tip. For this reason, even if the magnetic pen is held at an angle during drawing, the corner of the tip end surface of the pen body hardly hits the surface of the magnetic plate.

Further, since the base of the pen tip and the tip end surface of the pen body hardly protrude, the surface of the pen tip smoothly continues to the surface of the pen body. There is no inconvenience such as being caught on the pen and coming off the pen body.

According to the invention of claim 2, since the mounting shaft formed at the center of the base of the pen tip is press-fitted into the fitting hole in the tip end surface of the pen body, The pen tip is securely fixed, and the work of attaching the pen tip is easy.

According to the third aspect of the present invention, since the grip portion of the pen body has a substantially triangular cross section, the magnetic pen is naturally held between the thumb, the index finger and the middle finger when the infant grips the pen. Will have between. Therefore, it is easy to hold, and the infant can learn without knowing how to hold the pen.

[Brief description of the drawings]

FIG. 1 is a perspective view of a magnetic pen according to the present invention.

FIG. 2 is an enlarged sectional view of the state where the magnetic pen is disassembled.

FIG. 3 is an explanatory view of a mode of use of the magnetic pen.

FIG. 4 is a sectional view of another example of the magnetic pen.

FIG. 5 is a side view of a main part of a conventional magnetic pen.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pen main body 1a Tip surface 2 Pen tip 4 Base

Claims (3)

[Utility model registration claims] 1. A magnetic pen for a magnetic drawing plate, provided for a magnetic drawing plate for drawing on a plate surface, and having the following requirements. (B) The pen tip made of a magnet is fixed to one end of the pen body. (B) The end of the pen body is tapered. (C) The pen tip is formed in a spherical shape and the base is (D) The tip surface of the pen body and the base of the pen tip must be joined to each other. 2. A penetrating hole formed at the center of the tip end surface of the pen body, and a mounting shaft formed at the center of a base of the pen tip is press-fitted into the penetrating hole. Magnetic pen for magnetic drawing board. 3. The magnetic pen according to claim 1, wherein at least a grip portion of the pen body has a substantially triangular cross section.