JP2518892Y2 - Magnetic Panel Writing Board Eraser - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a writing panel for a magnetic panel, in which an erasing magnet is slidably arranged on the back side of the magnetic panel in order to erase the display written on the magnetic panel. Of a writing plate erasing device.

[0002]

2. Description of the Related Art Conventionally, as an erasing device for a writing plate of a magnetic panel, many structures have been proposed for sliding an erasing magnet along the back surface of the magnetic panel. Among them, Jikho Sho 5
As described in No. 7-36477, several pulleys are arranged at a certain position on the back side of the magnetic panel, and a string is wound around the pulleys, and the parts parallel to each other are erased. There is an erasing device for a writing plate of a magnetic panel having a structure in which an erasing magnet is slidably arranged by straddling a magnet.

[0003]

In the erasing device having such a structure, a holder for displaying a strip-shaped erasing magnet on a magnetic panel by rotating or moving a handle or a slide member for moving the string-shaped body. Slide the display window portion from one end to the other end. Therefore, as the writing plate becomes larger, the distance for sliding the erasing magnet increases and the moving distance of the handle or the sliding member also increases, which is difficult to operate.

The present invention has been made in view of the above problems, in which a string-shaped body is wound around a pulley which is arranged, and erasing magnets are stretched over mutually parallel portions of the string-shaped body. In an erasing device having a structure in which an erasing magnet is slidably arranged, the moving distance of a slide member for moving a string-like body for sliding the erasing magnet is set to the sliding distance of the erasing magnet even when the writing plate is enlarged. It is an object of the present invention to obtain an erasing device for a writing plate of a magnetic panel, which has a moving distance of 1 / N (an integer of 2 or more).

[0005]

In order to achieve the above-mentioned object, the present invention has a magnetic panel containing a magnetic particle-dispersed liquid attached to a holder, and is described on the back side of the magnetic panel on the surface of the magnetic panel. In a writing plate in which an erasing magnet for erasing a display is arranged, at least four pulleys are held outside a region facing a display window of a holder for writing on the magnetic panel on the back side of the magnetic panel. Two of them are arranged in the body part so that the common tangents of the parallel pulleys and the parallel pulleys are parallel to each other, and at the back side of the sliding member movably attached to the elongated through hole provided in the holding body, Place the drive pulley at two positions on the axis of the hole,
Each of the pulleys and the driving pulleys are arranged so that the portions of the string-shaped body between the pulleys move in the same direction and are parallel to each other, and the portions of the string-shaped body wound via the driving pulley are parallel to each other. Wrap a string-like body whose both ends are fixed to a holder or slide member around the pulley, and hang an erasing magnet between the parallel parts of the string-like body that is wound around the pulley and move in the same direction. An erasing device for a writing plate of a magnetic panel in which an erasing magnet is slid by the movement of a slide member, and a sliding distance of an erasing magnet is multiplied by N (an integer of 2 or more) with respect to a moving distance of the slide member.

As a writing plate, a magnetic panel is attached to a holder, but the holder may be formed of one sheet,
The magnetic panel may be attached to the holder by forming the frame and a holding plate made of a non-magnetic material, covering the back surface of the magnetic panel with the holding plate, and fixing the holding plate to the frame.

The sizes of the respective pulleys may be different as long as they are arranged so that the common tangents of the parallel pulleys and the parallel pulleys are parallel to each other as described above. Also,
The sizes of the driving pulleys may be different from each other, but preferably, in order to make sure that a small force is not applied when the slide member for sliding the erasing magnet is moved,
Each of the pulleys having the same diameter and the driving pulley are preferable.

[0008]

According to the present invention, the magnetic particles in the magnetic panel of the writing plate are caused to migrate to the surface side by the magnetic writing instrument, and the display formed on the surface of the magnetic panel is displayed on the slide member provided on the holder along the through hole. By moving the erasing magnet, the erasing magnet slides and the magnetic field of the erasing magnet acts on the magnetic particles that have migrated to form a display, and the magnetic particles migrate to the back surface side of the magnetic panel to erase the display.

The erasing magnet has a moving distance N of the slide member.
Sliding (an integer of 2 or more) times.

[0010]

Embodiments of the present invention will be described with reference to the drawings. In the description, the upper side, the lower side, the right side, and the left side of each component refer to the upper side, the lower side, the right side, and the left side in the drawings. Also, the same numbers are given to the same parts.

In FIGS. 1 to 3, a writing plate 1 has a holder 2 to which a magnetic panel 3 containing a magnetic particle-dispersed liquid is fixed. The holding body 2 is a box-shaped body and is composed of a frame body 4, a holding plate 5 and a back plate (not shown). The frame body 4 is a display for displaying on the magnetic panel 3 by a magnetic writing instrument (not shown). A window portion 6 is provided, and the magnetic panel 3 is attached to the display window portion 6
The back surface of the magnetic panel 3 is covered with a holding plate 5 and is pressed against it, and the holding plate 5 is fixed to the frame body 4, whereby the magnetic panel 3 is attached to the holding body 2.

On the back surface of the holding plate 5, two pulleys 7 (hereinafter, referred to as pulleys A, B, C, D) having the same diameter are provided outside the region of the frame body 4 facing the display window portion. The parallel pulleys A and B and the parallel pulleys C and D are arranged so that their common tangents are parallel to each other. The frame body 4 of the holding body 2 below the parallel pulleys C and D is provided with a through hole 8 penetrating therethrough and extending parallel to the common tangent of the parallel pulleys A and B and the parallel pulleys C and D. The length is about 1 / the length between the pulley A and the pulley B or between the pulley C and the pulley D.
There are two. The through hole 8 is provided with a slide member 10 having a knob portion 9 on the front surface side of the frame body 4, which is attached so as to be movable along the through hole 8. On the back side of the holding plate 5, the pulley 7 having the same diameter as the pulley 7 is provided at two positions on the axis of the through hole.
Drive pulley for driving the string 11 wound around
12 (hereinafter referred to as drive pulleys E and F) are arranged.

Each pulley 7 and each driving pulley 12 have
As shown in FIG. 4, a string-like body 11 having both ends fixed to the holding plate 5 is wound in sequence as follows. Holding plate 5 portion → drive pulley E → pulley C → pulley A → pulley B
-> Pulley D-> Pulley C-> Pulley D-> Driving pulley F-> Holding plate 5 part (between holding plate 5 part and driving pulley E, between pulley A and pulley B, between pulley D and pulley C, driving pulley A string-like member 11 wound between E and the pulley C, between the pulley D and the driving pulley F, and between the driving pulley F and the holding plate 5.
Are parallel to each other. )

The strip-shaped erasing magnet 13 is fixed to the fixing plate 14, and the portion of the string-shaped body 11 wound between the pulley A and the pulley B and the string-shaped winding magnet wound between the pulley C and the pulley D. body
The portion 11 is hung on the portions parallel to each other that move in the same direction as the portion of the string-like body 11, and is joined to the string-like body 11.

In order to erase the display on the magnetic panel 3 of the writing board 1, the knob 9 of the slide member 10 is grasped, the slide member 10 is moved, and the string 11 is moved by the drive pulley 12.
Are carried in and out, the erasing magnet 13 coupled to the string-like body 11 slides, and its magnetic field acts to cause the magnetic particles that have migrated to the front surface side of the magnetic panel 3 to migrate to the back surface side. ,
The display is erased. The sliding amount of the erasing magnet 13 due to the movement of the sliding member 10 is twice the moving amount of the sliding member 10. To move the erasing magnet 13 from one end of the display window 6 to the other, The slide member 10 may be moved by a distance that is half the distance.

FIG. 5 shows each pulley 7 so that the movement amount of the erasing magnet 13 is three times the movement amount 1 of the slide member.
FIG. 3 is a schematic view showing an arrangement of a drive pulley 12 and a method of winding a string-shaped body 11.

Similar to the above-mentioned embodiment, the holding plate 5 is provided with four pulleys 7 having the same diameter, and the slide member 10 has a driving pulley 12 '(hereinafter referred to as a driving pulley 12' having a diameter larger than that of the driving pulley 12). , Drive pulleys E ′, F ′) are arranged. Both sides of the through hole 8 are located on the left side of the driving pulley E ′ or the right side of the driving pulley F ′, and the common tangent to the driving pulley E ′ or the common tangent to the outside of the driving pulley F ′ is the pulley C. And a pulley 15 having a diameter half the diameter of the driving pulley 12 '(hereinafter, referred to as pulleys G and H) are arranged so as to be parallel to a common tangent line between the pulley D and the pulley D.

The method of winding the string-like body 11 is as follows. End of slide member 10 → pulley G → drive pulley E '→ pulley C → pulley A → pulley B → pulley D → pulley C → pulley D → drive pulley F' → pulley H → end of slide member 10 ( Between the end of the slide member 10 and the pulley G,
Between the pulley G and the driving pulley E ', between the driving pulley E'and the pulley C, between the pulley A and the pulley B, between the pulley D and the pulley C.
Between the pulley C and the pulley D, between the pulley D and the driving pulley F ′, between the driving pulley F ′ and the pulley H, and between the pulley H and the end of the slide member 10 are parallel to each other. Is. )

The erasing magnet 13 is hung on the string-like body 11 and connected to the string-like body 11 in the same manner as in the above-described embodiment.

FIG. 6 shows each pulley 7 so that the movement amount of the erasing magnet 13 is four times as large as the movement amount 1 of the slide member.
FIG. 3 is a schematic view showing an arrangement of a drive pulley 12 and a method of winding a string-shaped body 11.

Similar to the embodiment shown in FIG. 4, the holding plate 5 is provided with four pulleys 7 having the same diameter, and the slide member 10 is provided with a driving pulley 12. Through hole 8
The pulley 7 is attached to the holding plate 5 on the axis of the through holes 8 on both sides of the
And pulleys 15 '(hereinafter, referred to as pulleys G'and H') having the same diameter as the above. Further, on each of the drive pulleys 12, a drive pulley 12 '(hereinafter, referred to as drive pulleys I and J) having the same diameter and freely rotating without restricting rotation of each other is continuously provided. I am doing it.

The method of winding the string-shaped body 11 is as follows. Holding plate 5 part → Drive pulley I → Pulley G ′ → Drive pulley E → Pulley C → Pulley A → Pulley B → Pulley D → Pulley C → Pulley D → Drive pulley F → Pulley H ′
→→ Drive pulley J → Part of the holding plate 5 (between the part of the holding plate 5 and the driving pulley I, between the driving pulley I and the pulley G ′,
Between the pulley G ′ and the driving pulley E, between the driving pulley E and the pulley C, between the pulley A and the pulley B, between the pulley D and the pulley C.
, Between pulley C and pulley D, between pulley D and drive pulley F
Between the drive pulley F and the pulley H ′, between the pulley H ′ and the drive pulley J, and between the drive pulley J and the holding plate 5 are parallel to each other. )

The erasing magnet 13 is hung on the string-like body 11 and connected to the string-like body 11 in the same manner as in the above-mentioned embodiment.

[0024]

The device for erasing the writing plate of the magnetic panel according to the present invention has a simple structure because the erasing magnet is moved by the string-shaped member wound between the pulley and the driving pulley provided on the slide member. Therefore, there is an advantage that it can be manufactured at low cost. Even if the writing plate becomes large, the slide member is moved to erase the display on the magnetic panel and the erase magnet is moved from end to end of the display window portion of the frame body. The amount of movement of the erasing magnet can be increased by N (integer) times the amount of movement of the slide member depending on the arrangement method and the manner in which the string-like member is wound around the pulley and the drive pulley. Less is required. Further, since it is not necessary to increase the total length of the through hole, it is possible to reduce the decrease in rigidity of the holder to which the magnetic panel is attached.

[0025]

[Brief description of drawings]

FIG. 1 is a rear view of a writing plate showing an embodiment of an erasing device according to the present invention in which a back plate of a writing plate holder is removed.

FIG. 2 is a front view of a writing board.

FIG. 3 is an enlarged sectional view taken along line II of FIG. 1;

FIG. 4 is a schematic view showing how to wind the string-shaped body of the embodiment in FIG.

FIG. 5 is a schematic view showing how to arrange the pulleys and how to wind the string-shaped body around the pulleys and the driving pulleys so that the moving amount of the erasing magnet is tripled with respect to the moving amount of the slide member. It is a figure.

FIG. 6 is a schematic diagram showing how to arrange the pulleys and how to wind the string-like member around the pulleys and the driving pulleys so that the moving amount of the erasing magnet is four times the moving amount of the slide member. It is a figure.

[Explanation of symbols]

 1 Writing Plate 2 Holder 3 Magnetic Panel 6 Display Window 7 Pulley 8 Through Hole 10 Sliding Member 11 String 12 Drive Pulley 12 'Drive Pulley 13 Erase Magnet 15 Pulley

Claims (1)

(57) [Scope of utility model registration request] 1. A magnetic panel (3) containing a magnetic particle-dispersed liquid is attached to a holder (2), and the display on the surface of the magnetic panel (3) is erased on the back side of the magnetic panel (3). In a writing plate (1) having an erasing magnet (13) arranged, at least four pulleys (7) are holders for writing on the magnetic panel (3) on the back side of the magnetic panel (3). Two pieces are arranged on the holding body (2) portion outside the area facing the display window portion (6) of 2) so that the common tangent lines of the parallel pulley (7) and the parallel pulley (7) are parallel to each other. The drive pulleys are arranged at two positions on the axis of the through hole (8) on the back side of the slide member (10) which is arranged and is movably attached to the elongated through hole (8) provided in the holding body (2). (12, 12 ') are arranged and moved in the same direction at the part of the string (11) between the pulleys (7). So as to be parallel to each other, and as part of the string-like body wound through the driving pulley (12, 12 ') (11) parallel to each other,
The pulley (7) and the drive pulley (12, 12 ') are wound around the string-like body (11) having both ends fixed to the holding body (2) or the slide member (10) and wound around the parallel pulley (7). The erasing magnet (13) is laid over the parallel parts of the string-like body (11) that move in the same direction, and is connected to the string-like body (11).
The erasing magnet (13) is slid by the movement of the slide member (10), and the sliding distance of the erasing magnet (13) is N (an integer of 2 or more) times the moving distance of the slide member (10). Eraser of writing board of magnetic panel.