JP7055358B2 - Magnetic stationery - Google Patents

Description

The present invention relates to a magnetic writing tool capable of drawing characters, figures, symbols and the like on a magnetic panel including a magnetic display body and erasing the drawn characters and the like.

A magnetic pen with a magnet attached to the tip is drawn on a magnetic panel containing a magnetic display body, and the magnetic field from the magnetic pen acts on the display body to cause desired characters, figures, and symbols on the magnetic panel. Etc. can be drawn. For example, Patent Document 1 discloses a magnetic pen that relieves the writing pressure applied to a magnetic panel. Further, Patent Documents 2 to 4 disclose a magnetic panel for creating a recording layer by encapsulating magnetic particles in microcapsules. Further, Patent Document 5 discloses a magnetic erasing tool that erases characters and the like drawn on a magnetic panel by changing a magnetic field.

Japanese Unexamined Patent Publication No. 2009-935 JP-A-2007-256891 Japanese Patent No. 2717536 Japanese Patent No. 4089808 Japanese Patent No. 6213886

However, while conventional pen-type magnetic erasing tools are suitable for erasing a small area using a pen tip, when erasing a relatively large area, what is the magnetic erasing tool on a magnetic panel? You have to move it again. In addition, when drawing on a magnetic panel, the user needs to change the magnetic pen according to the line type to be drawn, and when correcting drawn characters, etc., the magnetic pen must be changed to a magnetic eraser. However, there is a problem that it lacks convenience.

An object of the present invention is to solve such a conventional problem, to improve an erasing function, and to provide a highly convenient magnetic writing tool.

The magnetic writing tool according to the present invention is capable of erasing characters, figures, etc. drawn on a magnetic panel, and has one end and the other end facing the one end. It has a housing in which an internal space extending in the longitudinal direction is formed, and a first magnet arranged in the internal space along the longitudinal direction and rotatable about a rotation axis, and a first magnet. In the magnet, the S pole and the N pole are magnetized in the radial direction of the rotation axis, and characters and the like on the magnetic panel can be erased at least in the longitudinal direction of the housing.

In one embodiment, the first magnet is capable of erasing characters and the like on a magnetic panel at one end of the housing. In one embodiment, the magnetic writing instrument further comprises a second magnet that is located on one end side of the internal space and is rotatable about the axis of rotation, wherein the second magnet is the rotation. The S pole and the N pole are magnetized in the radial direction of the shaft, and characters and the like on the magnetic panel can be erased at one end of the housing. In one embodiment, the magnetic writing instrument further comprises a writing member extending longitudinally in the internal space, to which a magnetic member is attached to the tip of the writing member, the magnetic member being mounted on a magnetic panel. When drawing, it can project from one end of the housing. In certain embodiments, the writing member is capable of passing through the central portion of the first and second magnets. In one embodiment, when the writing member projects from one end of the housing, the first distance between the second magnet and the magnetic panel is the letter on the magnetic panel due to the magnetic field of the second magnet. Etc. are the distances that are not erased. In one embodiment, when the writing member does not project from one end of the housing, the second distance between the second magnet and the magnetic panel is such that the magnetic field of the second magnet causes letters on the magnetic panel or the like. Is the distance that is not erased. In one embodiment, when the writing member does not project from one end of the housing, the third distance between the first magnet and the magnetic panel is such that the magnetic field of the first magnet causes letters on the magnetic panel or the like. Is the distance that is not erased. In one embodiment, when the housing is placed in close proximity to the magnetic panel approximately parallel, the first magnet is located at a fourth distance from the magnetic panel and the fourth distance is due to the magnetic field of the first magnet. This is the distance at which the above characters can be erased. In certain embodiments, the magnetic writing instrument further comprises a motor for rotating a first magnet, and a battery in the housing. In one embodiment, a plurality of the writing members are housed in a housing, the plurality of writing members include a magnetic member at the tip for drawing different line types, and one selected writing member is included. It can project from one end of the housing. Further, the magnetic writing system according to the present invention has a magnetic writing instrument having the above configuration and a magnetic panel.

According to the present invention, by rotatably accommodating the first magnet in the longitudinal direction in the internal space of the housing, characters and the like on the magnetic panel are collectively stored in a relatively large area along the longitudinal direction of the housing. It can be erased.

1 (A) is a perspective view of the magnetic writing tool according to the first embodiment of the present invention, and FIG. 1 (B) is a sectional view taken along the line AA. FIG. 2 is a diagram illustrating another mounting example of the magnet according to the present embodiment. It is a figure which shows an example which erases the character etc. drawn on the magnetic panel. It is sectional drawing of the magnetic writing tool which concerns on 2nd Embodiment of this invention. It is a figure which shows the perspective view of the magnetic writing tool which concerns on 3rd Embodiment of this invention. 5 is a cross-sectional view taken along the line A1-A1 of FIG. It is a figure which shows the state which the writing member by the 3rd Embodiment of this invention is extruded. It is a figure which shows the example at the time of drawing with the magnetic writing tool according to the 3rd Embodiment of this invention. It is a figure explaining the details of the magnetic material holder which concerns on 3rd Embodiment of this invention. It is a figure which shows the modification of the magnetic material holder which concerns on 3rd Example of this invention. It is a figure which shows the use example of the magnetic writing tool which concerns on 3rd Example. It is a figure which shows the use example of the magnetic writing tool which concerns on 3rd Example. It is a figure which shows the use example of the magnetic writing tool which concerns on 3rd Example. It is sectional drawing which shows the structure of the magnetic writing tool which concerns on 4th Embodiment of this invention. It is a figure which shows the use example of the magnetic writing tool which concerns on 4th Embodiment. It is a figure which shows the use example of the magnetic writing tool which concerns on 5th Embodiment of this invention. It is a figure which shows the structure of the magnetic writing tool which concerns on 6th Embodiment. It is a figure which shows the structure of the magnetic writing tool which concerns on 7th Example. It is an enlarged view of the tip part of the magnetic writing tool which concerns on 7th Embodiment. It is a figure which shows the modification of the magnetic writing tool which concerns on 7th Example.

Next, embodiments of the present invention will be described in detail with reference to the drawings. The magnetic writing tool of the present invention has a magnet rotatably mounted in a pen-shaped housing, and has a function of erasing characters, figures, pictures, etc. drawn on a magnetic panel or a magnetic sheet. Further, the magnetic writing tool of the present invention has a function of drawing characters, figures, pictures, etc. on a magnetic panel. It should be noted that the configuration of each part described in the drawings is exemplified for ease of explanation, and the size and the like are different from those of the actual product.

FIG. 1A is a perspective view showing the entire magnetic writing instrument according to the first embodiment of the present invention, and FIG. 1B is a cross-sectional view taken along the line AA. The magnetic writing tool 1 according to the present embodiment has a pen-shaped elongated housing 10. The housing 10 provides a portion to be gripped by the user and has, for example, a cylindrical shape. However, the outer shape of the housing may be triangular or other polygonal. Further, the housing 10 may include some concave portions and convex portions so that the user can easily hold the housing 10.

The housing 10 is made of a material that can transmit a magnetic field, for example, plastic. The housing 10 has one end 10A and the other end 10B and extends longitudinally from one end 10A toward the other end 10B. As shown in FIG. 1B, an internal space 12 is formed inside the housing 10 along the longitudinal direction, and the battery 20, the control circuit 25, the motor 30, and the magnet 40 are housed in the internal space 12. To.

In one embodiment, the magnet 40 is cylindrical and the north and south poles are magnetized in their radial direction. The magnet 40 has a length L in the axial direction, one end of which is close to one end 10A of the housing 10 and the other end directly to the rotating shaft 32 of the motor 30 or via gears. Is connected. The rotation shaft 32 of the motor 30 may coincide with the axial center C in the longitudinal direction of the housing 10, or may be substantially parallel to the shaft center C. The magnet 40 may also coincide with the longitudinal axis center C of the housing 10 or may be offset from the axis center C.

The control circuit 25 includes circuit elements for controlling the operation of the motor 30. In one embodiment, the control circuit 25 can start and stop the motor 30 in response to an input switch (not shown) provided in the housing 10. Further, in one embodiment, the control circuit 25 includes a microcontroller, and the microcontroller responds to user input by starting, stopping, rotating speed, and rotating time of the motor 30 by a program stored in its own ROM or the like. Can be controlled.

The battery 20 supplies electric power for operating the control circuit 25 and the motor 30. The other end 10B of the housing 10 is formed with an opening / closing lid 22 for inserting or replacing the battery 20. The opening / closing lid 22 is attached to the housing 10 so as to be openable / closable by, for example, a screw or a hook.

Next, another mounting example of the magnet 40 will be described. In the embodiment shown in FIG. 1, the magnet 40 is connected to the rotating shaft 32 of the motor 30, but in addition to this, as shown in FIG. 2A, the magnet 40 is configured in a link shape (annular shape). A cylindrical support member 41 is inserted into the center of the magnet 40, and the support member 41 is rotated by the motor 30. The support member 41 is made of, for example, a magnetic material such as metal or a non-magnetic material such as plastic. The magnet 40 and the support member 41 may be fixed by fitting, or the magnet 40 and the support member 41 may be fixed by an adhesive. By making the magnet 40 and the support member 41 hollow, the weight can be reduced and the drive load of the motor 30 can be reduced.

Further, as shown in FIG. 2B, a pair of magnets 40A and 40B may be attached to opposite sides of the cylindrical support member 41. The magnets 40A and 40B have, for example, a rectangular shape, and the S pole and the N pole are magnetized in the thickness direction. The magnets 40A and 40B are fixed to the outer periphery of the support member 41 with, for example, an adhesive.

Next, an example of erasing with the magnetic writing tool 1 is shown in FIG. As shown in the figure, the magnetic panel 100 is a transparent sheet capable of transmitting a magnetic field, and the front surface sheet 110, the back surface sheet 120 facing the front surface sheet 110, and the front surface sheet 110 constituting the display surface of the magnetic panel. It is composed of a plurality of microcapsules 130 arranged two-dimensionally or three-dimensionally in the space between the back sheet 120 and the back sheet 120.

The magnetic panel 100 is a type that can erase characters and the like drawn by applying a magnetic field from the front sheet 110 side, or a type that can erase characters and the like drawn by applying a magnetic field from the back sheet 120 side. It may be either.

The user so that the axis center C of the housing 10 is substantially parallel to the surface of the magnetic panel 100 and is at a distance from the surface sheet 110 so that the magnetic field from the housing 10 acts to erase characters and the like. , The magnetic writing tool 1 is grasped, and then the magnet 40 is rotated. The magnetic field changes due to the rotation of the magnet 40, and the changed magnetic field acts on the magnetic panel 100, so that it can be erased. At this time, since the magnet 40 extends at a distance L in the longitudinal direction of the housing 10, the erasable range is defined by the distance L. The user can then move the magnetic writing instrument 1 horizontally to erase the desired area on the magnetic panel.

FIG. 1C is a modification of the first embodiment. As shown in the figure, one end 10A of the housing 10 is brought close to the end of the magnet 40 extending in the longitudinal direction of the axis center C. In this case, by making the diameter of the magnet 40 smaller than that in FIG. 1 (B), the end portion of the magnet 40 can be brought closer to one end portion 10A of the housing 10. As a result, the magnetic field line 40A from the end portion of the magnet 40 is generated from one end portion 10A of the housing 10, and it becomes possible to erase a small range using the end portion 10A of the housing 10. In this case, as shown in FIG. 3, by bringing one end of the housing 10 into contact with the magnetic panel 100 and moving the magnetic writing tool in the horizontal direction, it is possible to erase a relatively small range.

Next, the magnetic writing tool according to the second embodiment of the present invention will be described. FIG. 4A is a cross-sectional view of the magnetic writing tool according to the second embodiment (the same cross section as in the first embodiment). The magnetic writing tool 1 according to this embodiment includes a magnet 42 in addition to the magnet 40. The magnet 42 has a columnar shape, and the north pole and the south pole are magnetized in the radial direction thereof. The magnet 42 has a smaller diameter than the magnet 40, is arranged coaxially with the magnet 40, and is rotated at the same time as the magnet 40.

One end face of the magnet 42 is in contact with the end face of the magnet 40, and the other end face is arranged so as to be close to one end 10A of the housing 10. However, the magnet 42 does not necessarily have to come into contact with the magnet 40, and may be arranged apart from the magnet 40 via a rotation shaft or the like.

The magnetic field line 42A from the north pole to the south pole of the magnet 42 protrudes like a fan from one end 10A of the housing 10. When the magnets 40 and 42 are rotated by the motor 30, the magnetic field line 42A of the magnet 42, that is, the magnetic field changes.

For example, as shown in FIG. 4B, the user brings one end 10A of the housing 10 into contact with the magnetic panel 100, so that the magnetic field lines 42A of the magnet 42 act on the magnetic panel 100 and the housing 10 Characters and the like can be erased within a small area at the tip. At this time, the magnetic field from the magnet 40 does not have a practical effect on the magnetic panel 100 because the distance from the magnetic panel 100 is more than a certain distance.

Next, the magnetic writing tool according to the third embodiment of the present invention will be described. FIG. 5 is a perspective view of the magnetic writing tool according to the third embodiment, and FIG. 6 is a sectional view taken along line A1-A1 thereof. The magnetic writing tool 1A according to the third embodiment further includes a knob 50 that can be operated from the outside of the housing 10, gears 60 and 70 for adjusting the speed of the magnet 40, and a writing member 80.

One end 10A of the housing 10 is connected to the internal space 12 and has a circular opening 14 formed in the direction of the axis center C of the housing 10. For example, one end of a cylindrical support member 41 as shown in FIGS. 2A and 2B is inserted into the opening 14, and the other end of the support member 41 is provided with a bearing portion (not shown). It is rotatably supported. Inside the support member 41, a columnar writing member 80 extending in an elongated axial direction is inserted. The writing member 80 protrudes from the opening 14 of the housing 10 or is housed in the opening 14 by a known extrusion lock mechanism. When drawing characters or the like on the magnetic panel, the writing member 80 protrudes from the opening 14 with a constant length as shown in FIG. 7 by the extrusion lock mechanism. The knob 50 is a part of the extrusion lock mechanism, and when the writing member 80 is in a state of protruding from the opening 14 by operating the extrusion portion, the writing member 80 is inserted into the opening 14 by operating the knob 50. Can be accommodated in.

The writing member 80 can be made of any material, and a magnetic material holder 82 for writing is attached to the tip thereof. Details of the magnetic holder 82 will be described later.

A gear 60 is connected to the rotating shaft of the motor 30, and the gear 60 meshes with the gear 70 connected to the end of the magnet 40. By appropriately selecting the gear ratios of the gears 60 and 70, the rotation speeds of the magnets 40 and 42 can be adjusted. In one embodiment, a gear ratio is selected such that the rotational speed of the rotating shaft of the motor 30 is low. Further, by interposing a gear between the motor 30 and the rotating shaft of the magnet 40, the degree of freedom in the layout of the motor 30 can be increased.

FIG. 8 is a diagram showing a writing state. The writing member 80 projects from one end 10A of the housing 10 and the writing member 80 is in contact with or close to the magnetic panel 100. At this time, the magnetic field from the magnetic material holder 82 at the tip of the writing member 80 acts on the magnetic panel 100, and characters, figures, and the like corresponding to the movement locus of the writing member 80 are drawn.

Next, the details of the magnetic material holder 82 for writing will be described with reference to FIGS. 9 to 9C. 9 (A) is a schematic cross-sectional view of the magnetic material holder, and FIG. 9 (B) is a view of the magnetic material holder as viewed from the bottom surface side. The magnetic material holder 82 has a holder body 84 having a substantially cylindrical shape, and a magnet 86 housed in the holder body 84. The holder body 84 is made of a magnetic material such as iron, and has a circular bottom surface 84A and a circular side surface 84B connected to the circular bottom surface 84A. The bottom surface 84A and the side surface 84B form a columnar internal space, and the magnet 86 is held in the internal space. The shape of the magnet 86 is, for example, a columnar shape that imitates the shape of the internal space, and the S pole and the N pole are magnetized in the axial direction thereof. An opening 84C is formed in the bottom surface 84A of the holder 84 to expose a part of the magnet 86. The opening 84C has, for example, a circular shape concentric with the axis center of the writing member 80.

Next, an example of a method for manufacturing a magnetic holder will be shown. A metal member 90 having a thickness T is prepared as a precursor, and as shown in FIG. 9C, the metal member 90 is processed into a cup shape by plastic working (bending, extrusion, drawing, cutting, etc.). Will be done. The bottom portion 92 and the side portion 94 of the processed metal member 90 have a thickness T. However, when cutting is performed, the thickness of the bottom portion 92 can be made different from the thickness of the side portion 94. Next, as shown in FIG. 9D, the bottom portion 92 is punched or drilled to have a diameter W to form a circular opening 94 in the bottom portion 92. Next, as shown in FIG. 9E, a columnar magnet 86 is inserted into the internal space formed by the bottom portion 92 and the side portion 94 from the upper open end of the metal member 90. In this way, the magnetic material holder 82 as shown in FIG. 9A is obtained.

When drawing characters or the like on the magnetic panel, the writing member 80 protrudes from one end 10A of the housing 10, as shown in FIGS. 7 and 8. At this time, the magnetic field line or the magnetic field on which the magnet 86 acts on the magnetic panel is adjusted by the size of the opening 84C formed in the bottom surface 84A of the holder main body 84. That is, since the holder body 84 is made of a magnetic material, the bottom surface 84A acts as a magnetic shield, and the larger the size W of the opening 84C, the more the magnetic field lines of the magnet 86 can be expanded in the radial direction. On the other hand, the smaller the size W of the opening 84C, the more the magnetic field lines of the magnet 86 cannot spread in the radial direction. By making the size W of the opening 84C appropriate, it is possible to adjust the line width and line type of characters and figures drawn on the magnetic panel.

Further, it is very difficult to miniaturize the magnet, but according to this embodiment, by reducing the size W of the opening 84C of the holder main body 84, it is possible to obtain a substantially miniaturized magnet. There is an advantage that it can be done.

Further, the surface of the magnet 86 is offset by a thickness T from the surface of the bottom surface 84A. By offsetting the surface of the magnet 86 from the surface of the bottom surface 84A, the magnetic field lines of the magnet 86 are suppressed from spreading in the radial direction more than necessary, which makes the edges of the outlines of drawn characters and figures unclear. Be prevented. In this embodiment, the adjustment of the offset amount of the magnet 86 or the positioning action of the magnet 86 is substantially unnecessary. As described above, if the magnet 86 is inserted into the internal space formed by the bottom portion 92 and the side portion 94 of the precursor, the offset amount of the magnet 86 can be guaranteed by the thickness T of the bottom portion 92.

FIG. 9F is a modified example of the magnetic holder. In the above example, the surface of the magnet 86 is exposed by the opening 84C of the bottom surface 84A, but when protecting the surface of the magnet 86, the opening 84C is provided by a protective member 88 made of a material capable of transmitting a magnetic field. Filled. When the surface of the magnet 86 is exposed, for example, magnetic dust, dust, dust, etc. in the air adheres to the surface of the magnet 86 or the opening 84C, whereby, from the size W of the opening 84C. The generated magnetic field lines or magnetic fields may be weakened, and as a result, it may not be possible to draw characters or the like clearly. Further, it is very troublesome to remove such magnetic dust and the like from the surface of the magnet 86. Since the magnetic holder 82 slides on the magnetic panel during drawing, it is desirable that the protective member 88 be slightly recessed from the same plane as the bottom surface 84A, whereby the top sheet 110 of the magnetic panel is recessed. It is prevented from being damaged, and the magnetic writing tool 1 can be slid smoothly. In addition to plastic working, the holder body 84 may be formed by mold forming or cutting.

Next, a modified example of the magnet used by the magnetic holder is shown in FIG. 9A. The magnetic material holder shown in FIGS. (A) and (B) is an example using a magnet 86A in which the N pole and the S pole are magnetized in the radial direction.
FIGS. (C) and (D) show an example in which two columnar magnets 86C-1 and 86C-2 are housed in the holder main body 84, and FIGS. (E) and (F) show a columnar shape. An example is shown in which four magnets 86D-1, 86D-2, 86D-3, and 86D-4 are housed in the holder main body 84. The shape, number, and arrangement of the magnets are not limited to the above, and may be other shapes, numbers, and arrangements.

According to the third embodiment, the magnetic writing tool 1A has a drawing function by the writing member 80 in addition to the erasing function by the magnets 40 and 40. 10 to 12 show an example of using the magnetic writing tool 1A according to the third embodiment.

When drawing on the magnetic panel 100, the magnetic material holder 82 at the tip of the writing member 80 protrudes from one end of the housing 10. At this time, the magnet 42 is maintained at a height h3 that does not exert a magnetic action on the magnetic panel 100. In other words, the distance from which the magnetic holder 82 protrudes is designed so that the height h3 of the magnet 42 can be maintained.

FIG. 11 shows a case where the pen tip of the housing 10 is used to perform erasing by the magnet 42. At this time, the magnetic material holder 82 is housed inside the opening 14, for example, the surface of the magnetic material holder 82 is offset from the surface of one end portion 10A of the housing 10 by Δk. Due to the offset amount Δk, the magnetic field line or the magnetic field from the magnetic material holder 82 is not sufficiently applied to the display panel 100. On the other hand, the height h1 from the magnet 42 to the magnetic panel 100 is a distance at which the magnetic field or the lines of magnetic force of the magnet 42 can sufficiently act on the magnetic panel 100. By rotating the magnet 42 in this state, characters and the like can be erased within a certain range of the pen tip of the housing 100. Further, the height h2 from the magnet 40 to the magnetic panel 100 is a distance at which the magnetic field lines of the magnet 40 cannot sufficiently act on the magnetic panel 100.

FIG. 12 shows a case where erasing by a magnet 40 is performed using a region in the longitudinal direction of the housing 10. The axial center C of the housing 10 is maintained substantially parallel to the surface of the magnetic panel 100 and at a height h4. The height h4 is a distance at which the magnetic field or magnetic field lines of the magnet 40 can sufficiently act on the magnetic panel 100. When the magnet 40 is rotated in this state, characters and the like can be erased within the range of the distance L in the longitudinal direction of the magnet 40.

In the above usage example, the case where the magnets 40 and 42 are rotated has been described, but it should be noted that characters and the like can be erased without rotating the magnets 40 and 42. Of course, it is easier to erase evenly and evenly by rotating the magnets 40 and 42 because the magnetic field changes, but if the user moves the magnetic writing tool appropriately, the equivalent erasure can be achieved. It is also possible to do it.

Next, FIG. 13 shows a cross-sectional view of the magnetic writing tool according to the fourth embodiment of the present invention. The same reference number is assigned to the same configuration as that of the above embodiment. The magnetic writing tool 1B according to the fourth embodiment includes a variable mechanism capable of changing the orientation of the magnetic material holder 82 at the tip of the writing member 80. As shown in the figure, a universal joint 98 is interposed between the writing member 80 and the magnetic holder 82. The configuration of the universal joint 98 is arbitrary, but for example, a joint using an elastic member such as a spring or rubber can be used.

Further, the magnetic material holder 82 includes a pedestal 99 for making the magnetic material holder 82 imitate the surface of the magnetic panel 100 when it comes into contact with the magnetic panel 100. The pedestal 99 is composed of, for example, a plastic member capable of transmitting a magnetic field, and accommodates the entire magnetic material holder 82, and the bottom surface thereof is a flat surface larger than the area of the bottom surface of the magnetic material holder 82. Further, in one embodiment, when the pedestal 99 is larger than the diameter of the opening 14, the pedestal 99 cannot be accommodated in the housing. Therefore, a cap 16 for protecting the pedestal 99 may be provided at the tip of the housing 100.

FIG. 14 is a diagram showing an example of using the magnetic writing tool according to the fourth embodiment. Similar to the above embodiment, the writing member 80 is projected from the opening 14 of the housing 10 by an extrusion lock mechanism (not shown), and characters and the like can be drawn on the magnetic panel 100.

According to this embodiment, when drawing on the magnetic panel 100, even if the user tilts the magnetic writing tool with respect to the magnetic panel 100, the pedestal 85 can imitate the magnetic panel 100 by the universal joint 98. That is, the lines of magnetic force from the magnetic body holder 82 can act on the magnetic panel 100 from a substantially vertical direction. This makes it easier for the user to draw, and at the same time, allows the user to draw characters, figures, and the like more clearly.

Next, a cross-sectional view of a magnetic writing instrument is shown in FIG. 15 in the fifth embodiment of the present invention. In the fifth embodiment, a plurality of writing members 80-1 and 80-2 are housed in the support member 41 of the housing 100. Magnetic material holders 82-1 and 82-2 are attached to the tips of the writing members 80-1 and 80-2, respectively. In order to allow characters and the like having different line widths to be drawn on the magnetic holders 82-1 and 82-2, for example, the size W of the opening 84C of the bottom surface 84A of the holder body 84 may be different, or the holder may be different. The shape, size, and number of magnets housed in the main body 84 are different. The extrusion lock mechanism can selectively extrude any one of a plurality of writing members from the tip of the housing by user operation. As a result, the user can easily draw characters and the like with a desired line width.

Next, FIG. 16 shows the configuration of the magnetic writing tool according to the sixth embodiment of the present invention. In the sixth embodiment, the spacer 200 for generating the height h8 between the magnet 40 and the magnetic panel 100 is provided on the outside of the housing 100. The spacer 200 is made of a material that can transmit magnetic force, such as plastic. By appropriately selecting the height h8, the position of the magnet 40 can be optimized and the erasing can be facilitated. At the same time, on the side where the spacer 200 is not provided, a height h4 is formed between the magnet 40 and the magnetic panel 100 as shown in FIG.

Next, a seventh embodiment of the present invention will be described. FIG. 17 is a diagram showing a cross-sectional view of the magnetic writing tool according to the seventh embodiment. The magnetic writing tool 600 according to the seventh embodiment has a gripping housing (grip portion) 602 in which an internal tool space extending in the longitudinal direction is formed, a battery 604 included in the housing 602, a control circuit 606, and a motor 608. It has a magnet 610. The control circuit 606 is supplied with electric power from the battery 604, and the switch 612 attached to the side wall of the housing 602 is pressed to drive the motor 608. The magnet 610 has a columnar shape extending in the longitudinal direction in the housing 602 with a constant length, and the north pole and the south pole are magnetized in the radial direction. When the magnet 610 is rotated by the drive of the motor 608, the magnetic field changes in the longitudinal range of the magnet 610 and at one end 622 of the magnet 610, either in the longitudinal direction of the housing 602 or on the magnetic panel at the end 622. It is possible to erase the characters drawn on the magnet. Further, a cylindrical slide member 624 made of a magnetic material that is movable in the axial direction of the magnetic writing tool 600 is provided, and by sliding the slide member 624, the magnetic field of the magnet 610 can be changed and the erasing range can be changed. can.

The magnetic writing tool 600 has a tip portion 614 at one end of the housing 602, and a rotation mechanism 616 is attached to one end of the tip portion 614. Further, a drawing unit 618 is attached to the rotation mechanism 616, and the drawing unit 618 includes a pen tip 620 having a magnet. The rotation mechanism 616 can rotate clockwise or counterclockwise with its center C as an axis, and its drive range may be rotatable without limitation or can rotate from 0 degrees to any angle. It may be anything. FIG. 18 is an enlarged view of a drawing portion of the magnetic writing instrument according to the seventh embodiment. When the magnetic writing tool 600 is pressed against the magnetic panel 100, the rotation mechanism 616 forms angles θ1 and θ2 between the drawing portion 618 and the tip portion 614 depending on the angle θ of the user's hand holding the magnetic pen, the pressed angle, and the like. The pen tip 620 can be tilted with respect to the surface of the magnetic panel 100 (FIG. 18A), or the pen tip 620 can be made perpendicular to the surface of the magnetic panel 100 (FIG. 18). (B)).

FIG. 19 is a diagram showing a modified example of the pen tip according to the seventh embodiment. The drawing unit 618 shown in the figure includes a pen tip 620A for drawing bold characters and a pen tip 620B for drawing fine characters. The drawing unit 618 can rotate about the center C of the rotation mechanism 616, and the pen tip 620A or 620B can be stored in the tip portion 614. FIG. 19A shows a state in which the pen tip 620B is housed in the tip portion 614, and the pen tip 620B can be made to appear by rotating the rotation mechanism 616 manually or automatically (FIG. 19A). 19 (B)). Although not shown, when the pen tip 620B is in a linear state as shown in FIG. 19A, the pen tip 620A is housed in the tip portion 614. The tip portion 614 and the housing 602 are removable by a screw mechanism 626, and the drawing portion as shown in FIG. 17 and the drawing portion as shown in FIG. 18 can be replaced.

Although the first to seventh embodiments have been described respectively, the present invention includes a combination of the first to seventh embodiments.

Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the specific embodiments, and various aspects of the present invention are described within the scope of the claims. It can be transformed and changed.

1, 1A, 1B: Magnetic writing tool 10: Housing 10A: One end 10B: The other end 12: Internal space 14: Opening 16: Protective cap 20: Battery 25: Control circuit 30: Motor 40, 42: Magnet 41 : Support member 80: Writing member 82: Magnetic material holder 84: Holder body 84A: Bottom surface 84B: Side surface 84C: Opening 86: Magnet 98: Universal joint 99: Pedestal 100: Magnetic panel 110: Front sheet 120: Back surface sheet 130: Microcapsule

Claims (9)

A magnetic writing tool that can erase characters, figures, etc. drawn on a magnetic panel.
A housing made of a material that has one end and the other end facing the other end, has an internal space extending in the longitudinal direction, and is capable of transmitting a magnetic field.
It has a first magnet that is arranged along the longitudinal direction in the internal space and is rotatable about a rotation axis.
In the first magnet, the S pole and the N pole are magnetized in the radial direction of the rotation axis, and a magnetic field is applied to at least one end of the housing to erase characters and the like on the magnetic panel . ,
The magnetic writing instrument further includes a writing member extending in the longitudinal direction in the internal space, and a magnetic material member is attached to the tip of the writing member, and the magnetic material member is described when drawing on a magnetic panel. A magnetic writing instrument that can project from one end of the housing . The magnetic writing tool according to claim 1, wherein the writing member projects through an opening formed in the one end of the housing. The magnetic writing tool according to claim 1, wherein the writing member projects from one end thereof via the first magnet. The magnetic writing tool according to claim 1, wherein the writing member projects to a height that does not exert the magnetic action of the first magnet on the magnetic panel. The first aspect of claim 1, wherein the first magnet is arranged in the housing so as to generate a magnetic field line from one end of the housing, and characters and the like on the magnetic panel can be erased at the one end. Magnetic writing tool. The magnetic writing instrument further comprises a second magnet located on the one end side of the interior space and rotatable about the axis of rotation.
In the second magnet, the S pole and the N pole are magnetized in the radial direction of the rotation axis, and the second magnet is magnetized.
The magnetism according to claim 1, wherein the second magnet is arranged so as to generate a magnetic field line from one end of the housing, and characters and the like on the magnetic panel can be erased at one end of the housing. Writing utensils. A plurality of the writing members are housed in the housing, the plurality of writing members include a magnetic member at the tip for drawing different line types, and one selected writing member is one of the above parts of the housing. The magnetic writing tool according to claim 1 , which can project from an end portion. The magnetic writing tool according to any one of claims 1 to 7 , further comprising a motor for rotating a first magnet and a battery in the housing. The magnetic writing tool according to any one of claims 1 to 8 .
With a magnetic panel
Magnetic writing system with.

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