JP4577904B2 - Magnetic pen for magnetic panel - Google Patents

Description

  The present invention relates to a magnetic pen having a writing tip as a magnet capable of writing on a magnetic panel.

2. Description of the Related Art Conventionally, a magnetic panel having a structure for displaying a handwriting by using a magnetic pen with a magnet as a writing tip and using a magnetic field of the magnet is well known. Specifically, this magnetic panel has
a) Dispersion liquid in which fine magnets having the S pole side surface colored in the first color and the N pole side surface colored in the second color dispersed in a dispersion medium as disclosed in, for example, Japanese Patent Publication No. 59-32796 In a liquid storage chamber, and the magnetic field of a magnetic pen is applied from the display surface side of the panel to invert the minute magnet to perform writing, and from the same display surface side a magnetic field opposite to that at the time of writing So-called magnetic reversal type display panel that erases the handwriting by re-inverting the micro magnet by acting
b) Alternatively, as disclosed in WO 2005/033790, the first magnetic material made of a high coercive force material and the second magnetic material made of a low coercive force material are mixed, and the surface on the S pole side is A magnetic panel in which a dispersion liquid in which a micro magnet colored in one color and colored on the N pole side surface in a second color is dispersed in a dispersion medium containing a coloring material in a third color is accommodated in a liquid storage chamber. Then, by applying the magnetic field of the magnetic pen from the display surface side of the panel, the micro magnets are moved or migrated / reversed to perform writing, and further, the magnetic pole opposite to the time of writing is applied from the display surface side. The reversing of the micro magnets that formed the display can change the writing color, and the magnetophoretic reversal of the structure that erases the handwriting by pulling the micro magnets back from the back side of the panel by the magnetic field of the erasing magnet There is a type display panel.

  The writing of such a magnetic panel requires that an external magnetic field is applied to a micro magnet having an S pole and an N pole to be reversed or attracted in a dispersed liquid. A writing magnet with the N pole directed toward the front side of the magnetic panel facing the front end is attached to the tip of the shaft tube, and an S pole for attracting the N pole side surface of the micro magnet toward the front side of the magnetic panel. Two different magnetic pens with a writing magnet with the pole facing the tip are attached to the tip of the shaft tube, and it is necessary to change the writing of each magnetic pen.

One way to eliminate the hassle of changing the magnetic pen as described above is to attach a magnet with a different magnetic pole at the tip of one shaft cylinder. was there.
Japanese Patent Publication No.59-32796 WO 2005/033790

  For the purpose of use in the above-described magnetic reversal display panel and magnetophoretic reversal display panel, the present invention comprises a writing magnet having an S pole at the tip and a writing magnet having an N pole at the tip. A magnetic pen for a magnetic panel provided at one end of the magnetic panel is obtained, and the color of the handwriting displayed on the magnetic panel when the user writes can be easily discriminated by the magnetic pen itself.

The present invention
“1. In a magnetic pen for a magnetic panel in which a dispersion liquid in which a micro magnet having a surface on the S pole side colored in the first color and a surface on the N pole side colored in the second color is dispersed in a dispersion medium, A shaft portion, a magnet holding portion, a bulging portion, and a locking portion are provided inside the barrel body having a front end opening and a rear sliding groove along the axial center. The first cursive body and the second cursive body, which are two colors of one color and the second color, are repelled rearward by a coil spring through which the shaft portion is inserted in the shaft cylinder body, and the swelling A locking receptacle provided in the shaft cylinder main body by projecting a protruding portion from the sliding groove and advancing the bulging portion of either the first writing body or the second writing body. By engaging the engaging portion of the cursive body with the portion, an N pole is provided at the tip attached to the magnet holding portion of the first cursive body corresponding to the bulging portion. The writing magnet having a south pole at the tip attached to the writing magnet or the magnet holding portion of the second writing body is maintained in a state of protruding from the tip opening of the shaft cylinder body. Magnetic pen for magnetic panels.
2. 2. The magnetic pen for a magnetic panel according to claim 1, wherein the first writing body and the second writing body are resin members formed by injection molding.
3. 3. The magnet for a magnetic panel according to claim 1 or 2, wherein the writing magnet of the writing body protrudes from the tip opening of the shaft cylinder body, and the magnet holding part is exposed from the tip opening. pen.
4). 4. The magnetic pen for a magnetic panel according to claim 3, wherein the magnet holder covers the surface of the writing magnet. "
It is.

  As the writing magnet, a general permanent magnet having different magnetic poles at the front end and the rear end can be used. When the writing magnet is fitted or adhered to a recess formed as a magnet holding portion at the tip of the writing body, or when the writing body is injection-molded with a resin, the writing magnet is previously attached to the tip portion of the writing body. It may be mounted so as to be cast into a magnet holding part. If the writing magnet is cast on the tip of the writing body, the surface of the writing panel will be hard to be damaged because the magnet is covered with the resin of the magnet holding part. This is preferable because the magnet can be protected. In this case, it is important to coat the resin with a thickness that allows the magnetic field of the writing magnet to penetrate the resin and act on the micro magnets of the magnetic panel.

  In addition, the coil spring is arranged so that the shaft portion of the writing body is inserted inside the shaft tube main body, and the front end is brought into contact with the projecting portion provided in the shaft tube main body, and the side surface of the shaft portion of the writing material inserted is inserted. The rear end portion is brought into contact with the protruding portion formed in the above, and the cursive body is ejected rearward.

  Further, the bulging portion formed on the writing body needs to have a shape that protrudes from a sliding groove provided on the shaft cylinder body when at least the writing magnet attached to the writing body is immersed in the shaft cylinder body. . Moreover, the latching | locking part formed in a writing body is made into the shape which can be latched to the latching receiving part provided in the axial cylinder main body, when a bulging part is moved ahead. Specifically, for example, the rear end of the bulging portion may be formed flat to be a locking portion, or a protruding portion that protrudes in the opposite direction of the bulging portion may be provided to make it easy to catch. Further, the latch receiving portion provided in the shaft cylinder main body has a wall surface extending in the forward direction from the inner surface of the rear end of the shaft cylinder main body, or when one of the writing bodies advances, It is good also as a structure where the latching | locking part of a body is latched by the latching receiving part formed in the other writing body.

  Further, for example, when the surface on the S pole side of the micro magnet is red and the surface on the N pole side is black, the first writing body having the N pole at the tip is red and the second writing body has the S pole at the tip. By setting the color of this to black, the user can discriminate the writing color of the writing body that is projected by the color of each bulging portion, and the writing magnet of the writing body can be protruded from the shaft cylinder body. Furthermore, if the structure is such that the magnet holding part is exposed from the tip opening together with the writing magnet, the color of the handwriting that can be written on the magnetic panel by the user looking at the color of the magnet holding part exposed from the tip opening during writing. Since it can be grasped, convenience is improved.

  Since the magnetic pen for a magnetic panel of the present invention has the structure as described above, a writing magnet having an S pole at the tip and a writing magnet having an N pole at the tip are selectively selected from one end of one shaft cylinder. It will be able to appear and disappear, and it will not be necessary to switch to another magnetic pen to change the writing color. In addition, it is possible to project the writing body of the target writing color by looking at the color of the bulging part at the start of use, and further, the magnet holding part exposed from the tip opening of the shaft cylinder body at the time of writing It becomes possible to check the writing color by looking at the color. Further, by integrally forming the writing body by injection molding with a resin, it is possible to provide an inexpensive one with a simple structure with a small number of members. Further, by covering the writing magnet with the magnet holding part, it is possible to protect not only the writing magnet itself but also the surface of the magnetic panel that comes into contact.

  Next, embodiments of a magnetic pen for a magnetic panel according to the present invention will be described with reference to the drawings. However, the present invention is not limited to the following embodiments. In addition, the same members and the same parts in the drawings are denoted by the same reference numerals. In this embodiment, the side with the writing tip is expressed as the front and the opposite side is expressed as the back.

  FIG. 1 is a side view of a magnetic pen according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along line AA of FIG. The magnetic pen 1 accommodates a first writing body 5 and a second writing body 6 in a hollow shaft body 4 formed by fitting the rear end of the front shaft 2 and the front end of the rear shaft 3. is there. A front end opening 2 a is formed in front of the front shaft 2, and two sliding grooves 3 a and 3 b formed along the shaft center are provided in the rear of the rear shaft 3.

  The first writing body 5 and the second writing body 6 have writing magnets 7 and 8 attached to their tips. The writing magnet 7 is fitted in a recess formed as a magnet holding portion 5b at the tip of the shaft portion 5a of the first writing body 5 with the N pole facing the tip, and the writing magnet 8 has the S pole at the tip. The second cursive body 6 is fitted into a recess formed as a magnet holding portion 6b at the tip of the shaft portion 6a.

  Further, the cursive bodies 5 and 6 are formed with bulging portions 5c and 6c protruding from the sliding grooves 3a and 3b at the rear end portions thereof. Further, the first writing body 5 and the second writing body 6 are provided with projecting portions 5d and 6d projecting from the center line of the shaft portion at an intermediate portion between the shaft portions 5a and 6a, and the projecting portions 5d and 6d and the shaft. Coil springs 10 and 11 are disposed between the piece member 9 mounted in the cylinder main body 4 and the first writing body 5 and the second writing body 6 are constantly repelled rearward. The first writing body 5 has the shaft portion 5a inserted into the through hole 9a provided in the coil spring 10 and the piece member 9, and the second writing body 6 has the shaft portion 6a penetrated through the coil spring 11 and the piece member 9. It is inserted through the hole 9b.

  FIG. 3 is a diagram in which the bulging portion of the cursive body is moved forward to be used. The magnetic pen 1 shown in FIG. 3 advances the bulging portion 5c of the first writing body 5, and includes a writing magnet 7 and a magnet holding portion 5b each having an N pole at the tip from the tip opening 2a of the shaft cylinder body 4. It is protruding. At this time, the coil spring 10 is compressed, and a locking portion 5e formed at the rear end portion of the first writing body 5 is brought into contact with a locking wall 3c that hangs forward from the inner surface of the rear end of the rear shaft 3. The writing magnet 7 and the magnet holding portion 5b are kept protruding from the tip opening 2a. Similarly, a locking portion 6e is also formed at the rear end portion of the second writing body 6, and by moving forward so as to push down the bulging portion 6c, it is for writing having an S pole at the tip from the tip opening 2a. The protruding state of the magnet 8 and the magnet holding part 6b can be maintained. The locking portions 5e and 6e are formed on a flat ground perpendicular to the direction along the axial center of the shaft cylinder body 4, and are provided with recesses 5f and 6f so as to be easily caught on the locking wall 3c which is a locking receiving portion. It is. Further, relief portions 5g and 6g are formed inside the rear portions of the first writing body 5 and the second writing body 6, and the locking portion of the protruding writing body is in contact with the inside of the other writing body. I'm not going to do that.

  In addition, what is necessary is just to slide the bulging part of the cursive body opposite to the direction which protrudes to immerse the cursive body of a protrusion state. Each of the first cursive body 5 and the second cursive body 6 is provided with release protrusions 5h and 6h for releasing the locked state of each other, and the first cursive body 5 shown in FIG. When in the projecting state, the bulging portion 6c of the second writing body 6 is slightly slid forward so that the locking portion 5e of the first writing body 5 locked to the locking wall 3c is moved. The latch release protrusion 6h of the second cursive body 6 can be pushed down to release the lock. The unlocking protrusions 5h and 6h are inclined surfaces that incline from the front to the rear toward the center so that the other locking portions 5e and 6e can be easily shifted outward while being pushed down.

  In this embodiment, although not shown, it is intended for use in a magnetic panel in which fine magnets having a red surface on the south pole side and a black surface on the north pole side are dispersed in a dispersion liquid. The first writing body 5 equipped with 7 is injection-molded with a red resin, and the second writing body 6 equipped with a writing magnet 8 having an S pole at the tip is injection-molded with a black resin. Accordingly, the user can select the color (red, black) of the bulging portions 5c and 6c protruding from the sliding grooves 3a and 3b of the shaft cylinder body 4, or the magnet holding portion 5b protruding from the tip opening 2a of the shaft cylinder body 4. The color of the handwriting that can be displayed on the magnetic panel can be determined by the color 6b (red, black). In addition, since each of the writing bodies is made of resin, the shaft portions 5a and 6a can be easily deformed into a curved state inside the shaft tube main body 4, and a smooth projecting operation can be performed.

  FIG. 4 is a sectional view of a modification. In the present embodiment, the first writing body 5 and the second writing body 6 are the same as those described above except that the magnet holding portions 5b and 6b cover the writing magnets 7 and 8 with the covering portions 5i and 6i. Similar to the example. In this example, when the first writing body 5 and the second writing body 6 made of resin were injection-molded, the writing magnets 7 and 8 were respectively cast and formed.

  As a magnetic pen for a magnetic panel, a magnetic pen equipped with a writing body with a writing magnet with a different outer shape attached to the tip so that the width of a thick line and a thin line can be written may be used as a magnetic pen. it can. Furthermore, not only two but also three or more cursive letters may be accommodated in the shaft cylinder main body. For example, there are two types: a magnetic panel having micro magnets with a red surface on the S pole side and a black surface on the N pole side, and a magnetic panel having micro magnets with a blue surface on the S pole side and a yellow surface on the N pole side. In this case, the first writing body with a writing magnet having an N pole at the tip is injection-molded with a red resin, and the second writing body with a writing magnet having an S pole at the tip is black. A fourth writing body that is injection-molded with a resin, a third writing body that has a writing magnet having an N pole at the tip, is injection-molded with a blue resin, and a writing magnet that has an S pole at the tip is attached Can be made into a magnetic pen that can handle two magnetic panels by injection molding with yellow resin and housing the four writing bodies in one shaft cylinder body

It is a side view of the magnetic pen which is an Example of this invention. It is the sectional view on the AA line of FIG. It is the figure which made the bulging part of a cursive body advance and was used. It is sectional drawing of a modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Magnetic pen, 2 ... Front shaft, 2a ... Tip opening part,
3 ... rear end, 3a, 3b ... sliding groove, 3c ... locking wall,
4 ... The barrel body,
5 ... first cursive body, 5a ... shaft portion, 5b ... magnet holding portion, 5c ... bulge portion,
5d ... projecting part, 5e ... locking part, 5f ... recessed part, 5g ... escape part,
5h: release protrusion, 5i: covering portion,
6 ... Second cursive body, 6a ... Shaft part, 6b ... Magnet holding part, 6c ... Swelling part,
6d ... projecting portion, 6e ... locking portion, 6f ... recessed portion, 6g ... escape portion,
6h: release protrusion, 6h: covering portion,
7 ... Writing magnet, 8 ... Writing magnet,
9 ... Piece member, 9a ... Through hole, 9b ... Through hole,
10 ... Coil spring, 11 ... Coil spring.

Claims (4)

  In a magnetic pen for a magnetic panel in which a dispersion liquid in which a micro magnet having a first color on the south pole side and a second color on the north pole side is dispersed in a dispersion medium is contained in a liquid storage chamber A shaft cylinder, a magnet holding portion, a bulging portion, and a locking portion, and a first color of the micro magnet inside the shaft cylinder main body having an opening and a sliding groove along the axial center on the rear side, The first cursive body and the second cursive body which are two colors of the second color are repelled rearward by a coil spring inserted through the shaft portion in the shaft cylinder body, and the bulging portion is Protruding from the sliding groove, the swelled portion of either the first cursive body or the second cursive body is advanced, and the latch receiving portion provided in the shaft cylinder main body A brush having an N pole at the tip attached to the magnet holding portion of the first cursive body corresponding to the bulging portion by locking the locking portion of the cursive body A magnetic panel characterized by maintaining a state in which a writing magnet having an S pole at the tip attached to a magnet holding portion of the magnet or the second writing body is projected from the tip opening of the shaft cylinder body Magnetic pen.   The magnetic pen for a magnetic panel according to claim 1, wherein the first and second writing bodies are resin members formed by injection molding.   3. The magnet for a magnetic panel according to claim 1, wherein the writing magnet of the writing body protrudes from a tip opening portion of the shaft cylinder body, and the magnet holding portion is exposed from the tip opening portion. pen.   The magnetic pen for a magnetic panel according to claim 3, wherein the magnet holder covers the surface of the writing magnet.

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