NZ734028B - Magnetic pen - Google Patents
Magnetic penInfo
- Publication number
- NZ734028B NZ734028B NZ734028A NZ73402817A NZ734028B NZ 734028 B NZ734028 B NZ 734028B NZ 734028 A NZ734028 A NZ 734028A NZ 73402817 A NZ73402817 A NZ 73402817A NZ 734028 B NZ734028 B NZ 734028B
- Authority
- NZ
- New Zealand
- Prior art keywords
- magnetic
- holder
- magnet
- pole
- panel
- Prior art date
Links
- 239000000696 magnetic material Substances 0.000 claims abstract description 13
- 239000003094 microcapsule Substances 0.000 description 17
- 239000002245 particle Substances 0.000 description 14
- 239000006249 magnetic particle Substances 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 229910052742 iron Inorganic materials 0.000 description 4
- 229910001369 Brass Inorganic materials 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 230000000875 corresponding Effects 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 230000002441 reversible Effects 0.000 description 2
- 230000037250 Clearance Effects 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N TiO Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000001070 adhesive Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 230000035512 clearance Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000000838 magnetophoresis Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 229910001929 titanium oxide Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K23/00—Holders or connectors for writing implements; Means for protecting the writing-points
- B43K23/001—Supporting means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K29/00—Combinations of writing implements with other articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K29/00—Combinations of writing implements with other articles
- B43K29/10—Combinations of writing implements with other articles with illuminating devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K8/00—Pens with writing-points other than nibs or balls
- B43K8/22—Pens with writing-points other than nibs or balls with electrically or magnetically activated writing-points
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K8/00—Pens with writing-points other than nibs or balls
- B43K8/24—Pens with writing-points other than nibs or balls characterised by the means for retracting writing-points
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L1/00—Repeatedly-usable boards or tablets for writing or drawing
- B43L1/008—Repeatedly-usable boards or tablets for writing or drawing with magnetic action
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
- G06F3/03545—Pens or stylus
Abstract
The present invention relates to a magnetic pen (10) that is capable of drawing arbitrary characters, figures, symbols, etc. by applying a magnetic field to a display panel including magnetized display bodies. The magnetic pen (10) includes a body (20) with an end portion (30). A holder (40) made of a magnetic material is attached to the end portion (30) and an internal space is formed in the holder (40). A magnet having an S pole and an N pole is arranged in the internal space of the holder (40) so that the S pole and the N pole are opposite the magnetic panel. of a magnetic material is attached to the end portion (30) and an internal space is formed in the holder (40). A magnet having an S pole and an N pole is arranged in the internal space of the holder (40) so that the S pole and the N pole are opposite the magnetic panel.
Description
MAGNETIC PEN
CROSS-REFERENCE TO RELATED APPLICATIONS
This application claims priority to Japanese Application No. 2016-148086, filed
on July 28, 2016, which application is hereby incorporated herein by reference.
TECHNICAL FIELD
The present invention relates to a magnetic pen, e.g., one that is capable of
drawing arbitrary characters, figures, symbols, etc. by applying a magnetic field to a display
panel including magnetized display bodies.
BACKGROUND
When a magnetic pen with a magnet attached to the end portion is drawn with
respect to a magnetic panel including magnetized display bodies, the magnetic field of the
magnetic pen acts on the display bodies so that character, figure, symbol, or the like
corresponding to the moving track of the magnetic pen can be displayed at a magnetic panel.
For a magnetic pen that applies the magnetic field to the magnetic panel, Japanese patent
publication No. 2009-935, for example, discloses a magnetic pen that weakens the pressure
in writing applied to the magnetic panel with a simple structure. In addition, Japanese
patent publication No. 2007-256891, Japanese patent registration No. 2717536, and
Japanese patent registration No. 4089808 each discloses a magnetic panel that forms a
recording layer by enclosing magnetic particles in microcapsules.
The conventional magnetic pen has the following problems. shows a
sectional view of an end portion of the conventional magnetic pen. A cylindrical holder 1
made of a nonmagnetic material such as plastic, resin or brass or the like is provided at the
end portion of the magnetic pen to accommodate a magnet 2 in an internal space of the
holder 1. The magnet 2 is arranged to protrude somewhat from an edge 3 of the holder 1.
Lines of magnetic force 4 are formed from an N pole to an S pole of the magnet 2 to act on
the magnetic panel (not shown) to move cataphoretically display bodies such as a
microcapsule of the magnetic panel.
In the conventional magnetic pen, the lines of magnetic force 4 from the N pole to
the S pole protruding from the edge 3 of the holder 1 spread out in the radial direction of the
holder 1, in other words lines of magnetic force 4 includes lots of portions 4a which are
spread out in the horizontal direction, as the result when characters or figures are drawn on
the magnetic panel, the outlines of characters or figures are blurred, lines are exuded, and
edges are unclear. For example, when drawing the Japanese word for "rice", the four
squares were sometimes crushed.
Furthermore, the thickness of line segment such as characters displayed on the
magnetic panel depends on the size and shape of the end portion of the magnetic pen. For
example if the magnet size in the width direction is increased, the thickness of line segment
on the magnetic panel is thickened. However, when the width of the magnet 2 in the
magnetic pen as shown in is spread, the lines of magnetic force 4a extending in the
horizontal direction are greater than that of the vertical direction, not only the edges of line
segments are blurred, it may happen that character is erased while drawing.
SUMMARY
Embodiments of the present invention solve such conventional problems and
provide a magnetic pen that enables to draw clear images as compared with the conventional
art.
In the present invention, a magnetic pen for a magnetic panel comprises a holder
made of a magnetic material attached to an end portion of the magnetic pen. An internal
space is formed in the holder. A magnet is arranged in the internal space of the holder so that
at least the S pole and the N pole are opposite the magnetic panel.
In some embodiments, the surface of the magnet is located so as to be recessed
from the edge of the holder.
In some embodiments, the surface of the magnet is at the same position as the
edge of the holder.
In some embodiments, the magnetic pen further comprises an adjusting
mechanism for adjusting a position of the magnet with respect to the edge of the holder.
In some embodiments, the magnet includes a plurality of S poles and a plurality
of N poles so as to face the magnetic panel.
In some embodiments, the plurality of S poles and the plurality of N poles are
arranged in rotational symmetry with respect to the axial center of the holder.
In some embodiments, the magnetic pen further comprises a magnetic member
arranged in the internal space of the holder adjacent to the magnet.
In some embodiments, the magnetic member is disposed at the axial center of the
holder.
In some embodiments, the magnetic pen further comprises a grip portion
connected to the end portion. The end portion is connected to the grip portion through an
universal joint.
In some embodiments, the universal joint provides a two-dimensional or three-
dimensional connection so that the axis of the holder is substantially perpendicular to the
plane of the magnetic panel.
In some embodiments, the end portion includes a sliding guide for sliding on the
surface of the magnetic panel and the sliding guide is connected to the universal joint.
In some embodiments, the universal joint is attached so as to offset from the
center of the holder.
In some embodiments, the universal joint is attached coaxially with the center of
the holder.
In some embodiments, the universal joint is comprised of an elastic member.
In some embodiments, the magnetic pen is configured such that the end portion
is rotatable about an axis.
Furthermore in the present invention, a magnetic pen for a magnetic panel
comprises a holder made of a magnetic material attached to an end portion of the magnetic
pen. An internal space is formed in the holder. A magnet is disposed in the internal space of
the holder. A surface of the magnet opposite the magnetic panel is at a position recessed
from an edge of the holder.
According to the present invention, since the magnet of the S pole and the N pole
are arranged in the holder of the magnetic material at the end portion so as to face the
magnetic panel, the lines of magnetic force are acted effectively on the magnetic panel
compared with the conventional magnetic pen, as the result characters with sharp edges and
less exuding can be drawn on the magnetic panel.
BRIEF DESCRIPTION OF THE DRAWINGS
shows a front view of a magnetic pen according to a first embodiment of
the present invention.
shows a perspective view of the magnetic pen according to the first
embodiment of the present invention.
which includes FIGs. 3(A)-3(C), shows an end portion of the magnetic pen
according to the first embodiment of the present invention. shows a plan view of the
holder at the end portion and its cross-sectional view of line A - A, shows a plan view
of the holder in which magnets are held and its cross sectional view of A - A line, and
shows a perspective view of the holder in which magnets are held.
exemplifies a cross-sectional view of a magnetic panel applicable with the
magnetic pen according to the first embodiment of the present invention.
shows a view for explaining the operation of the magnetic pen according to
the first embodiment of the present invention.
which includes FIGs. 6A-6C, shows a cross-sectional view and a
perspective view of the end portion of a magnetic pen according to a second embodiment of
the present invention.
which includes FIGs. 7A-7D, shows a view for explaining the magnetic pen
according to a third embodiment of the present invention.
shows a modified example of the magnetic pen according to the third
embodiment of the present invention.
shows a further modified example of the magnetic pen shown in .
shows a modified example of the magnetic pen according to the third
embodiment of the present invention.
shows a modified example of the magnetic pen according to the third
embodiment of the present invention.
shows a further modified example of the magnetic pen shown in .
which includes FIGs. 9A-9C, shows a view for explaining a magnetic pen
according to a fourth embodiment of the present invention.
, which includes FIGs. 10A-10L, shows various examples for arranging
magnets applied to each embodiment of the present invention.
, which includes FIGs. 11A-11D, shows a view for explaining a magnetic
pen according to a fifth embodiment of the present invention.
shows a view for explaining problems of a conventional magnetic pen.
The following reference numerals can be used in conjunction with the drawings:
: Magnetic pen
: grip portion
: distal end portion
40: holder
42: internal space
44: edge
50, 52: magnet
50a, 52a: surface
70: universal joint
80: sliding guide
100: magnetic panel
110: top sheet
120: back sheet
130: microcapsule
DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS
Next, embodiments of the present invention will be described in detail with
reference to the drawings. In a preferred embodiment of the present invention, the magnetic
pen includes a magnet at its end portion, and the magnetic pen is enable to draw characters,
figures, pictures, and etc. on a magnetic panel by causing magnetic field to act on the
magnetic sheet such as a magnetophoretic type or a magnetic reversal type. Please note that
the configurations shown in the drawings for explaining the embodiments of the present
invention are different from the actual ones.
shows a front view of a magnetic pen according to a first embodiment of
the present invention, and shows a perspective view of the magnetic pen. The
magnetic pen 10 includes a cylindrical grip portion (body portion) 20 for gripping and an
end portion 30 connected to the grip portion 20. When the magnetic pen 10 is slid on the
magnetic panel 100, characters, figures and the like corresponding to the trajectory of the
magnetic pen 10 can be drawn on the magnetic panel 100 by the action of the magnetic field
from the magnetic pen 10. Details of the magnetic panel will be described later.
The grip portion 20 is sufficient if it has a length enough for the user to grasp by
hand and the material of the grip portion 20 is not particularly limited. For example, the grip
portion 20 can be made of a plastic or resin material etc. as well as the material of the
conventional magnetic pen. The end portion 30 is coupled with the grip portion 20 and is
provided with a magnet for exerting a magnetic field on the magnetic panel 100.
shows details of the end portion 30. The end portion 30 includes a
cylindrical holder 40, which is made of a magnetic material. The magnetic material is, for
example, iron, soft iron or the like. A cylindrical internal space 42 is formed in the holder 40
and has a predetermined depth d from a circumferential edge 44. The outer diameter φ of
the holder 40 is appropriately selected according to the shape and size of the magnet to be
accommodated in the internal space 42.
The end portion 30 further includes a magnet accommodated in the internal
space 42. In one preferred example, a pair of cylindrical magnets 50, 52 is accommodated in
the internal space 42. The pair of magnets 50, 52 is preferably of the same size. This,
however, is not a limitation and the magnets 50, 52 may be different sizes. The outer
diameter φ of the magnets 50, 52 is preferably 0.5 mm or more in terms of handling, but it is
not necessarily limited to this. From the viewpoint of the lines of magnetic field, about 0.5 to
1.2 mm is practically preferable. As the diameter increases, the edges of letters or the like are
likely to be unclear because the lines of magnetic force parallel to the magnetic panel from
the magnet increase.
As shown in , the magnets 50, 52 are accommodated in the internal space
42 so that the S pole and the N pole of each magnet are reversed relationship in their
positions. In the illustrated example, the N pole of the magnet 50 is exposed to the side of
edge 44 and the S pole of the magnet 52 is exposed to the side of the edge 44. Here, two
magnets 50, 52 are accommodated in the holder, but if the number of magnets is increased,
the diameter of the holder also increases accordingly, and a thick line can be drawn.
Each magnet 50, 52 has a length in the axial direction shorter than the depth d of
the internal space 42. When one end of each magnet 50, 52 contacts with the bottom of the
internal space 42, each surface 50a, 52a of the other end of the magnets 50, 52 is positioned
by Δd recessed from the edge 44 of the holder 40. One end of the magnets 50, 52 is fixed to
the bottom of the internal space 42 with an adhesive or the like. Although Δd depends on the
strength of the magnetic flux of the magnet and its diameter, it is, for example, about 0.1 to
0.5 mm, preferably about 0 to 0.3 mm. A gap or a space formed between the magnets 50, 52
and the internal space 42 may be filled with a magnetic material such as soft iron or a yoke
58 or the like (see A).
shows an example of a magnetic panel that the magnetic pen of this
embodiment can be used. The magnetic panel 100 includes a top sheet 110, which is a
transparent sheet capable of transmitting a magnetic field, for providing the display surface
of the magnetic panel, a back sheet 120 opposite the top sheet 110, and a plurality of
microcapsules 130 two-dimensionally arranged in the space between the top sheet 110 and
the back sheet 120. The plurality of microcapsules 130 are accommodated in a case (not
shown).
Preferably, the microcapsule 130, for example, includes at least one kind of
magnetic particles having a particle size of 0.1 μm to 1.0 μm, at least one kind of magnetic
particles having a particle size of 1 μm to 20 μm, white nonmagnetic particles such as white
titanium oxide, dispersion and additives in a transparent spherical cell. The size of the
microcapsules is, for example, 50 to 650 μm. Such a magnetophoretic type magnetic panel is
disclosed in, for example, Japanese patent No. 4089808 4 and has following features.
A. Small particles are easily reacted in the direction of lines of magnetic force
with horizontal lines of magnetic force.
B. In the magnetic pen having the vertical lines of magnetic force, the large and
small magnetic particles are reacted to allow the front side to change black for drawing
characters.
C. When erasing from the front side of the magnetic panel, if only the horizontal
magnetic field lines are applied to the small particles sensitive to the horizontal lines of
magnetic force, the small particles migrate in the direction of the lines of magnetic force to
change white. At this time, since the large particles rarely react, they remain "black", and the
black can be seen through from the front side, so that it does not completely become white,
which generates decrease in contrast.
D. In order to erase characters, it is sufficient to react horizontal lines of
magnetic force. On the contrary, a magnetic pen having horizontal lines of magnetic force
erase the written characters by itself immediately, which causing defects.
One microcapsule 130 forms one pixel. For example, as shown in , when
the magnetic field is applied to the microcapsule 130 by the magnetic pen 10 on the top sheet
110, as described above, in response to the lines of magnetic force in the vertical direction
from the magnetic pen, the black magnetic particles in the microcapsules 130 migrate to the
front surface. In this manner, when the magnetic pen 10 is moved on the top sheet 110, the
magnetic particles in the microcapsules 130 migrate in accordance with the movement to
form images. On the other hand, when erasing the images, an erasing magnet (not shown) is
slid on the top sheet 110, and small particles migrate to the front side in response to the lines
of magnetic force in the horizontal direction from the erasing magnet to erase the images. In
this case, it is desirable that a certain clearance is provided between the erasing magnet and
the top sheet 110 so as to apply a large amount of horizontal lines of magnetic force to the
magnetic panel.
Note that the microcapsule 130 is not necessarily limited to the above structure.
For example, the microcapsule 130 may include permanent magnet particles in a transparent
spherical cells and the permanent magnet particle may be magnetized so as to have N pole
and S pole. The magnetic panel may be erased from the front side or back side. For
example, the permanent magnet particles of N pole may be painted black, and the
permanent magnet particles of S pole may be painted white, and the permanent magnet
particles can move freely within the cell according to the magnetic field from the magnetic
pen or erasing magnet.
In addition to the magnetophoresis type, the magnetic panel may be a magnetic
reversal type magnetic sheet. Further, the magnetic panel 100 may erase the drawn images
by applying the magnetic field from the top sheet 110 or may erase the drawn images by
applying the magnetic field from the back sheet 120.
The operation of the magnetic pen 10 according to the embodiment will be
described. schematically shows the lines of magnetic force generated by the
magnets 50, 52 in the holder 40 according to this embodiment. In this embodiment, since
the surfaces of the magnets 50, 52 are disposed so as not to protrude from the edge 44 of the
holder 40 of a magnetic material, the lines of magnetic force 60 extending from the N pole of
the magnet 50 to the S pole of the magnet 52 is converged within the radial direction so as
not to exceed the holder 40. In other words, the lines of magnetic force from the outermost
shell of the N pole of the magnet 50 enters the S pole via the side wall 46a of the holder 40,
whereas the lines of magnetic force from the N pole of the magnet 52 enters the S pole of the
magnet 52 via the side wall 46b of the holder 40, so the lines of magnetic force are confined
in the radial direction. That is, the lines of magnetic force from the N pole surface of the
magnet 50 to the S pole surface of the magnet 52 extend in the vertical direction and are
restricted within the radius of the holder 40, and the microcapsules 130 as shown in
are acted by the restricted lines of magnetic force. As the result, the magnetic particles in the
microcapsules 130 which are acted by the lines of magnetic force in the vertical direction
within the restricted area are migrated, and, for example, the magnetic particles migrate to
the front side.
On the other hand, schematically shows the lines of magnetic force in
which the magnets 50, 52 protrude from the edge 44 of the holder 40. In this case, since the
surfaces of the magnets 50 and 52 protrude from the edge 44, the lines of magnetic force Q
from the N pole of the magnet 50 to the side wall 46a of the holder 40 extend in the
horizontal direction somewhat. When the lines of magnetic force Q extending in the
horizontal direction act on the microcapsule 130, the magnetic particles in the capsule
receive the magnetic force in a direction to erase, for example, the magnetic particles migrate
to the back side, and instead the white nonmagnetic particles receive the magnetic force to
migrate to the front side, as the result, characters are drawn by the lines of magnetic force 60
at the center of the holder 40, and simultaneously the edges of characters drawn by the outer
lines of magnetic force Q at the outer edge are erased, thereby edges and outlines of images
being blurred. Also, depending on the magnetic panel, the lines of magnetic force in the
horizontal direction weakens the attraction force to attract the magnetic particles, so black
and white are mixed in that portion, thereby the edge of images being blurred.
Further, as described in , even if the holder 40 is made of a metal such as a
non-magnetic material, for example brass, since the lines of magnetic force of the magnets
50 and 52 include portions which exceed the radial direction of the holder and spread out in
the horizontal direction somewhat, due to the above reason the lines of magnetic force in the
direction to erase at the edge of the drawn images or the lines of magnetic force to weaken
the attraction force of the magnetic particles is acted, therefore the characters or the like are
blurred.
Next, a second embodiment of the present invention will be described. In the
first embodiment, the vertical position of the magnets in the holder 40 is fixed. The magnetic
pen in the second embodiment, however, has a function of varying the height of the magnets
in the holder 40.
is a cross-sectional view for showing the configuration of the end portion
of the magnetic pen according to the second embodiment of the present invention. The
second embodiment includes an adjusting mechanism 200 for adjusting the heights of the
magnets 50, 52 in the holder 40. The adjustment mechanism 200 can be configured using
kinds of known techniques. For example, the adjustment mechanism 200 includes a screw
mechanism for changing the heights of the magnets 50 and 52 by rotating screws. In this
case, a manipulating member for rotating the screw is attached so as to be available from the
outside of the holder 40. Alternatively, the adjustment mechanism 200 may include a slide
mechanism for changing the height of the magnets 50, 52 by sliding the slide member in up
and down directions. In this case, a manipulation member for sliding is attached so as to be
available from the outside of the holder 40.
FIGs. 6B and 6C show a state in which the surfaces 50a, 52a of the magnets 50, 52
are adjusted to the same position as the edge 44 of the holder 40 by the adjusting mechanism
200 ( Δd = 0). It should be noted here that the maximum position at which the height of the
magnets 50, 52 can be varied by the adjustment mechanism 200 is up to the position where
the surfaces 50a, 52a of the magnets 50, 52 do not exceed the edge 44 ( Δ d <= 0).
In the second embodiment, by adjusting the heights of the magnets 50, 52, it is
possible to vary the magnitude of the lines of magnetic force that can act on the magnetic
panel 100 from the magnetic pen 10, and to adjust the thickness and density of the line
segment to be drawn.
Next, a third embodiment of the present invention will be described. It is
desirable that the lines of magnetic force generated from the magnetic pen 10 are incident
perpendicularly to the plane of the magnetic panel 100. In the first and second
embodiments, since the end portion 30 and the holder 40 are fixed with respect to the grip
portion 20, the user is forced to stand the magnetic pen 10 perpendicularly to draw. The
third embodiment makes it possible for the user to tilt the magnetic pen 10 in drawing while
ensuring that the lines of magnetic force are incident substantially perpendicularly to the
magnetic panel 100.
As shown in and , which shows an enlarged perspective view of
, the magnetic pen 10 according to the third embodiment includes a universal joint
70 for connecting the end portion 30 with the holder 40, and includes a sliding guide 80 for
guiding the sliding of the holder 40. The universal joint 70 may be, for example, a ball joint
as shown in . The universal joint 70 includes a ball 72 formed at a tip of the end
portion 30 and a rectangular bearing body 74 for connecting the ball 72. A semicircular
bearing hole 76 is formed at an upper end portion of the bearing body 74 to accommodate
the ball 72 slidably. Inside the bearing body 76, the holder 40 is incorporated.
The sliding guide 80 is a plate. The bearing body 74 is attached to an upper
surface of the sliding guide 80 and the bottom surface slides on the magnetic panel 100. At
this time, the axial direction of the magnets 50, 52 accommodated in the holder 40 in the
bearing body 74 is in a relationship that its position is perpendicular to the surface of the
magnetic panel 100. Preferably, the sliding guide 80 is made of a material that does not
increase friction, resistance, etc. when sliding on the magnetic panel 100. In addition, the
sliding guide 80 is desirably made of a transparent material so that characters or the like
drawn on the magnetic panel 100 can be seen through.
The sliding guide 80 is formed, for example, in a circular shape, but may have a
shape other than this (for example, a quadrangular shape). If the sliding guide 80 is made of
a nonmagnetic material, the opening of the holder 40 in the bearing body 74 may be closed
by the sliding guide 80. Alternatively, an opening having a size matching the shape of the
holder 40 may be formed in the sliding guide 80 so that the opening of the holder 40 is
exposed to the magnetic panel side. shows the holder 40 and the magnets 50, 52 as
viewed from the bottom side of the sliding guide 80.
As described above, according to the third embodiment, the user can tilt the grip
portion 20 at an arbitrary angle when drawing, on the other hand, it is guaranteed that the
axis of the holder 40 is perpendicular to the magnetic panel 100 when the sliding guide 80
on the magnetic panel 100 is slid, therefore the lines of magnetic force from the magnetic
pen 10 can be effectively acted on the magnetic panel 100. Consequently, it is ensured that
the line segments of letters or the like drawn on the magnetic panel 100 are clear. If the tip
of the magnetic pen (or the tip of the holder) is thinned, the surface of the magnetic panel
may be damaged, however, by providing the sliding guide 80, the surface of the magnetic
panel is protected.
shows a modified example of the universal joint. The universal joint 70A
includes a pair of parallel extending portions 90 extending from the tip of the end portion
, a rotating shaft 92 attached between the pair of extending portions 90, and a bearing
body 94 rotatably supported by the rotating shaft 92. An upper end portion of the bearing
body 94 is swingably connected by the rotating shaft 92.
is a further modified example of FIG 8A. In the universal joint 70A
shown in , the movement is restricted in the rotation direction by the rotation shaft
92. In order to eliminate this restriction, the magnetic pen shown in connects the
grip portion 20 with the extending portion 90 through a rotating member 96. The structure
of the rotating member 96 is not particularly limited. For example, the rotating member 96
includes a columnar member and rotating shafts at both ends of the columnar member, and
the rotating shafts of both ends are rotatably connected to the grip portion 20 and the
extending portion 90 respectively.
is a further modified example of the third embodiment. In this modified
example, the center of the universal joint 70 is offset from the axis center Y 1 of the holder
40. Further, in the modified example shown in , the universal joint 70 is composed
of a coil spring 78 instead of the ball joint. In the example shown in the figure, the center of
the coil spring 78 coincides with the axis center Y 1 of the holder 40, but the center of the coil
spring 78 may be offset from the axis center Y 1 as in the case of . Further, although
not shown here, the universal joint 70 may be formed by using another elastic member (for
example, a blade spring).
Furthermore, is a modified example in which the rotating member 96
shown in is applied to the magnetic pen with the coil spring 78 in . As
shown in the drawing, the rotating member 96 is preferably provided at the end portion 30,
but the rotating member 96 may be provided at a other position (for example, a position at
which the coil spring 78 is connected).
In this manner, in the third embodiment, by interposing the universal joint
between the grip portion 20 or the end portion 30 and the holder 40, it is possible to make
the axis of the holder 40 to be perpendicular to the magnetic panel 100 regardless of the
inclination of the grip portion 20, which allows characters or the like to be drawn clearer.
Next, a fourth embodiment of the present invention will be described. In the
fourth embodiment, the holder 40 is provided with a mechanism for rotating the holder 40.
shows a magnetic pen according to the fourth embodiment. Four cylindrical
magnets 50, 52, 54, and 56 are accommodated in a holder 40 attached to the end portion 30.
The N poles of the magnets 50 and 56 are exposed to the magnetic panel side; the S poles of
the magnets 52 and 54 are exposed to the magnetic panel side. The N poles and the S poles
of the magnets 50, 52, 54 and 56 are alternately placed in the holder 40 and are in rotational
symmetry with respect to the axis of the holder 40. For example, the holder 40 is connected
through a rotating member that is rotatable in the axial direction with respect to the end
portion 30.
By accommodating such four magnets 50 to 56 in the holder 40, the magnetic
flux density is increased, a large magnetic field can be applied to the magnetic panel 100,
thus sharp characters and the like can be drawn. Furthermore, if the diameter of the holder
40 accommodating the four magnets 50 to 56 is increased, it is possible to draw characters
and the like having a thicker line segment on the magnetic panel.
On the other hand, when such four magnets are arranged, the lines of magnetic
force from the N poles to the S poles adjacent the axial center of the holder 40 is less likely to
occur. As the result, when a line segment is drawn by the magnetic pen 10, as shown in , stripes with shading unevenness are easily to occur in the diagonal directions P1 and P2.
In the fourth embodiment, since the holder 40 is rotatable about the axis, when drawing by
the magnetic pen 10, as shown in , the diagonal directions P1 and P2 of the holder 40
are freely or arbitrarily changed, so that the shading on the drawn line segments or the like is
prevented to occur.
Next, a configuration example of various magnets that can be applied to the
embodiments of the present invention is shown in . A shows an example in
which the magnetic body 58 is disposed in the gap or the space of the holder 40 including the
magnets 50 and 52 shown in By incorporating the magnetic material 58, the lines of
magnetic force can be concentrated in the holder 40. B shows an example in which
one physical shaped magnet with a S pole and a N pole on the one surface is arranged in the
holder 40. C is a modified example of the magnet shown in B, in which a
donut-shaped magnet having a through hole at the center is arranged in the holder 40. In
this case, as well as in A, for example, a cylindrical magnetic body may be arranged in
the space of the central portion. D shows an example in which one physical donut-
shaped magnet having two N poles and two S poles on the one surface is arranged in the
holder 40. Also in this case, for example, a cylindrical magnetic body may be arranged in the
space of the central portion.
The sizes of the magnets accommodated in the holder 40 may be different from
each other. For example, as shown in E, the N pole magnet may be larger than the S
pole magnet, which are exposed to the magnetic panel, or conversely, as shown in F,
the S pole may be larger than the N.
Furthermore, as shown in G, a magnetic material (for example, shaft such
as a soft iron) 58 is arranged in the space between the center of the four magnets (center of
the holder 40) to collect the lines of magnetic force at the central portion. Furthermore, as
shown in H, the magnets may be arranged at a diamond shape. In this case, the
internal space of the holder 40 may also have the diamond shape. Furthermore, as shown in
I, it is also possible to arrange three magnets so that two N poles are exposed and one
S pole is exposed, and as shown in J, it is also possible to arrange five magnets or to
arrange six magnets as shown in K. Furthermore, as shown in L, a plurality of
magnets, in which each magnet including a S pole and a N pole at the one surface, are
arranged such that the S poles and the N poles are alternately disposed, and magnetic body
58 may also be arranged in the center.
Another embodiment of the present invention will be described furthermore. In
the above embodiments, a plurality of magnets received in the holder 40 include at least one
N pole and at least one S pole at the side of facing with the magnetic panel, however, in this
embodiment, as shown in , one magnet 300 is accommodated in the holder 40. The
surface of the N pole of the magnet 300 is recessed by the depth Δd from the edge 44 of the
holder 40. Even in such configuration, since the lines of magnetic force from the N pole
recessed by Δd are directed to the S pole through the holder 40, the lines of magnetic force
are suppressed within the radius of the holder 40 and are easily extended at vertical
direction, thus the magnetic field acts to the microcapsules of the magnetic panel effectively.
Furthermore, as discussed with respect to the second embodiment, the
adjustment mechanism 200 for adjusting the height of the magnet 300 can be applied to the
configuration shown in . Also in this case, it should be noted that the surface of the
magnet 300 is adjusted within a range not exceeding the edge 44 of the holder 40. That is,
Δd <= 0.
In the above embodiments, the cylindrical grip portion, the end portion and the
holder are exemplified, however their shapes are not limited to the cylindrical shape. They
may be other rectangular shapes or elliptical shapes. In particular, the shape of the end
portion is arbitrary, and the internal space formed therein is also arbitrary. Also, the size
and shape of the magnets accommodated in the holder are arbitrary. Preferably, the shape
and size of the magnet are selected according to the shape and size of the internal space of
the holder, or the shape and size of the internal space of the holder are selected according to
the shape and size of the magnet.
Although the preferred embodiments of the present invention have been
described in detail above, the present invention is not limited to the specific embodiments,
but various other modifications and/or changes may be made without departing from the
scope of the present invention described in the claims.
Claims (7)
1. A magnetic pen that enables to draw arbitrary characters, figures, symbols, etc. on a magnetic panel for a display by applying a magnetic field, the magnetic pen comprising: a holder made of a magnetic material attached to an end portion of the magnetic pen, an internal space formed in the holder; and a magnet arranged in the internal space of the holder so that an S pole and an N pole are opposite the magnetic panel at least, wherein an end surface of the magnet is located so as to be recessed from an edge of the holder.
2. The magnetic pen according to claim 1, further comprising an adjusting mechanism to adjust a position of the magnet with respect to the edge of the holder.
3. The magnetic pen according to claim 1 or 2, wherein a plurality of cylindrical magnets are arranged in the internal space of the holder and a magnetic member arranged in a space formed at the center of the plurality of magnets.
4. The magnetic pen according to any one of claims 1 to 3, further comprising a grip portion connected to the end portion, wherein the end portion is connected to the grip portion through an universal joint and the end portion includes a sliding guide for sliding on the surface of the magnetic panel.
5. The magnetic pen according to claim 4, wherein the axis of the holder is substantially perpendicular to a plane of the magnetic panel.
6. The magnetic pen according to any one of claims 1 to 5, wherein the holder is rotatable about the end portion.
7. The magnetic pen according to any one of claims 5 to 7, wherein the universal joint is attached so as to offset from the center of the holder. [
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016-148086 | 2016-07-28 | ||
JP2016148086A JP6179788B1 (en) | 2016-07-28 | 2016-07-28 | Magnetic pen |
Publications (2)
Publication Number | Publication Date |
---|---|
NZ734028A NZ734028A (en) | 2018-02-23 |
NZ734028B true NZ734028B (en) | 2018-05-24 |
Family
ID=
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