Exhibition board

Abstract

To provide an exhibition board comprising a surface board formed of a transparent or semi-transparent base material, a back board placed on the back side of the surface board, and an intermediate board sandwiched between the surface board and the back board, in which the surface board, the back board, and the intermediate board can be integrated more easily.SOLUTION: In an exhibition board 1, a front board 3, a back board 4, and an intermediate board 5 are integrated by magnetic attraction force generated between a permanent magnet 6 and a permanent magnet 7. Also, in the exhibition board 1, a first protrusion part 6a of the permanent magnet 6 fixed to the front board 3 protrudes from the back surface of the front board 3 toward the back side, a second protrusion part 7a of the permanent magnet 7 fixed to the back board 4 protrudes from the front surface of the back board 4 toward the front side, and the intermediate board 5 is provided with a first engagement hole 5d with which the first protrusion part 6a engages, and a second engagement hole 5e with which the second protrusion part 7a engages.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a display board. [Background technology]

[0002] Conventionally, there has been known a medium display board for displaying a medium such as a photograph (see, for example, Patent Document 1). The medium display board described in Patent Document 1 includes two boards made of transparent or translucent plates such as acrylic resin or glass, and magnets embedded in the two boards. The medium is placed between the two boards. In the medium display board described in Patent Document 1, the medium is held between the two boards by magnetic attraction generated between the magnet embedded in one board and the magnet embedded in the other board. Therefore, this medium display board allows for easier medium replacement compared to when the medium is held between two boards fixed with screws. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Registered Utility Model No. 3106554 Summary of the Invention [Problem to be solved by the invention]

[0004] The present inventors are developing an exhibition board for displaying a specified exhibit. The exhibition board under development includes a top board made of a transparent or translucent base material, a back board placed on the back side of the top board, and an intermediate board sandwiched between the top board and the back board. In order to easily attach and detach the intermediate board, the present inventors have decided to integrate the top board, the back board, and the intermediate board by magnetic attraction generated between permanent magnets fixed to the top board and permanent magnets fixed to the back board. It is preferable that the top board, the back board, and the intermediate board can be more easily integrated in this exhibition board under development.

[0005] Therefore, the object of the present invention is to provide an exhibition board that includes a surface board formed from a transparent or translucent base material, a back board that is placed on the back side of the surface board, and an intermediate board that is sandwiched between the surface board and the back board, and that allows the surface board, back board, and intermediate board to be more easily integrated. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, the display board of the present invention comprises a front board formed of a transparent or translucent base material, a back board placed on the back side of the front board, an intermediate board sandwiched between the front board and the back board, front-side permanent magnets which are permanent magnets fixed to the front board, and back-side permanent magnets which are permanent magnets fixed to the back board, the front board having magnet fixing holes to which the front-side permanent magnets are fixed, the back board having magnet fixing holes to which the back-side permanent magnets are fixed, a portion of the front-side permanent magnets being first protrusions that protrude from the back side of the back board to the back side, and a portion of the back-side permanent magnets being second protrusions that protrude from the front side of the back board to the front side, the intermediate board having first engagement holes with which the first protrusions engage and second engagement holes with which the second protrusions engage, and the front board, back board, and intermediate board are integrated by the magnetic attraction force generated between the front-side permanent magnets and the back-side permanent magnets.

[0007] In the display board of the present invention, the front board, back board, and intermediate board are integrated by the magnetic attraction force generated between the front permanent magnet and the back permanent magnet, so that the present invention makes it possible to integrate the front board, back board, and intermediate board more easily than, for example, when the front board, back board, and intermediate board are integrated by fastening them with screws.

[0008] Furthermore, in the present invention, a first protrusion of the front-side permanent magnet fixed to the front board protrudes from the rear surface of the front board to the rear side, and a second protrusion of the back-side permanent magnet fixed to the back board protrudes from the front surface of the back board to the front side, and the intermediate board is formed with a first engagement hole with which the first protrusion engages and a second engagement hole with which the second protrusion engages. Therefore, in the present invention, when the front board, back board, and intermediate board are integrated, the front board and intermediate board can be easily positioned by the first protrusion and the first engagement hole, and the back board and intermediate board can be easily positioned by the second protrusion and the second engagement hole. Therefore, in the present invention, the front board, back board, and intermediate board can be integrated more easily.

[0009] Furthermore, in the present invention, the first protrusion and the first engagement hole can prevent misalignment between the front board and the intermediate board, and the second protrusion and the second engagement hole can prevent misalignment between the back board and the intermediate board. Therefore, in the present invention, it is possible to prevent misalignment between the front board, the intermediate board, and the back board, which are integrated by magnetic attraction.

[0010] Furthermore, in the present invention, the first protrusion of the front-side permanent magnet fixed to the front board protrudes from the back side of the front board, the second protrusion of the back-side permanent magnet fixed to the back board protrudes from the front side of the back board, and the intermediate board is formed with a first engagement hole with which the first protrusion engages and a second engagement hole with which the second protrusion engages, so that even if the intermediate board is thick, it is possible to reduce the distance between the front-side permanent magnet and the back-side permanent magnet in the thickness direction of the display board. Therefore, in the present invention, even if the intermediate board is thick, the magnetic attractive force generated between the front-side permanent magnet and the back-side permanent magnet allows the intermediate board to be properly held between the front board and the back board.

[0011] In the present invention, it is preferable that the thickness of the intermediate board is greater than the sum of the lengths of the first protruding portion and the second protruding portion, and that the front-side permanent magnet and the back-side permanent magnet are spaced apart in the thickness direction of the intermediate board. With this configuration, the integrated front board, back board, and intermediate board can be more easily separated than when the front-side permanent magnet and the back-side permanent magnet are attached to each other.

[0012] In the present invention, it is preferable that the intermediate board has a through hole formed therein that penetrates the intermediate board in the thickness direction of the intermediate board, one side of the through hole being the first engagement hole and the other side of the through hole being the second engagement hole. This configuration makes it easier to form the first engagement hole and the second engagement hole in the intermediate board.

[0013] In the present invention, for example, the intermediate board is formed with an exhibit placement hole in which an exhibit is placed, and in this case, the exhibit placed in the exhibit placement hole can be displayed by the exhibition board.

[0014] In the present invention, it is preferable that the front board and the intermediate board have a predetermined design. This configuration allows the design of the exhibition board to be enhanced. Furthermore, this configuration allows the front board integrated with the back board and the intermediate board to be replaced with a front board with a different design, or the intermediate board integrated with the front board and the back board to be replaced with an intermediate board with a different design, thereby allowing the design of the exhibition board to be changed to various designs. Therefore, it is possible to change the design of the exhibition board to a design that suits the user's preferences.

[0015] In the present invention, it is preferable that the intermediate board is formed of a transparent or translucent base material, and the back board has a predetermined design. This configuration makes it possible to further enhance the design of the exhibition board. Furthermore, this configuration makes it possible to change the design of the exhibition board to a wider variety of designs by replacing the back board integrated with the front board and intermediate board with a back board of a different design. [Effects of the Invention]

[0016] As described above, the present invention makes it possible to more easily integrate the surface board, back board, and intermediate board in an exhibition board that comprises a surface board formed from a transparent or translucent base material, a back board that is placed on the back side of the surface board, and an intermediate board that is sandwiched between the surface board and the back board. [Brief explanation of the drawings]

[0017] [Figure 1] (A) is a front view of an exhibition board according to an embodiment of the present invention, (B) is a cross-sectional view of the EE section of (A), (C) is an enlarged view of part F of (B), and (D) is an enlarged view of part G of (B). [Figure 2] 2A is a rear view of the surface board shown in FIG. 1, and FIG. 2B is a cross-sectional view of the HH cross section of FIG. [Figure 3]2A is a front view of the intermediate board shown in FIG. 1, and FIG. 2B is a cross-sectional view of the JJ cross section of FIG. [Figure 4] FIG. 10(A) is a front view of a display board according to another embodiment of the present invention, and FIG. 10(B) is a cross-sectional view of the display board taken along the line KK in FIG. [Figure 5] 5A is a front view of the surface board shown in FIG. 4, (B) is a front view of the intermediate board shown in FIG. 4, and (C) is a front view of the back board shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0019] (Display board configuration) Fig. 1(A) is a front view of an exhibition board 1 according to an embodiment of the present invention, Fig. 1(B) is a cross-sectional view of the E-E section of Fig. 1(A), Fig. 1(C) is an enlarged view of part F of Fig. 1(B), and Fig. 1(D) is an enlarged view of part G of Fig. 1(B). Fig. 2(A) is a rear view of the surface board 3 shown in Fig. 1, and Fig. 2(B) is a cross-sectional view of the H-H section of Fig. 2(A). Fig. 3(A) is a front view of the intermediate board 5 shown in Fig. 1, and Fig. 3(B) is a cross-sectional view of the J-J section of Fig. 3(A).

[0020] The display board 1 of this embodiment is a board for displaying guitar picks 2, which are exhibits. The display board 1 is formed in the shape of a rectangular flat plate. The size of the display board 1 corresponds to the size of the picks 2. The display board 1 comprises a surface board 3 that forms the surface (front side) of the display board 1, a back board 4 that is placed on the back side of the surface board 3, and an intermediate board 5 that is sandwiched between the surface board 3 and the back board 4. The display board 1 also comprises a permanent magnet 6 that serves as a surface-side permanent magnet fixed to the surface board 3, and a permanent magnet 7 that serves as a back-side permanent magnet fixed to the back board 4. The display board 1 of this embodiment comprises four permanent magnets 6 and four permanent magnets 7.

[0021] The surface board 3, the back board 4, and the intermediate board 5 are formed in the shape of rectangular flat plates. The surface board 3 and the back board 4 are formed in the same shape. The thickness of the intermediate board 5 is thinner than the thickness of the surface board 3. The outer shape of the intermediate board 5 is approximately the same as the outer shape of the surface board 3. The display board 1 has a three-layer structure in which the surface board 3, the intermediate board 5, and the back board 4 overlap in the thickness direction. The back surface of the surface board 3 is in contact with the front surface of the intermediate board 5. The back surface of the intermediate board 5 is in contact with the front surface of the back board 4.

[0022] The front board 3, the back board 4, and the intermediate board 5 are formed from a transparent base material. In this embodiment, the front board 3, the back board 4, and the intermediate board 5 are formed from a transparent resin. For example, the front board 3, the back board 4, and the intermediate board 5 are formed from an acrylic resin. The permanent magnets 6, 7 are rare earth magnets. For example, the permanent magnets 6, 7 are neodymium magnets. The permanent magnets 6, 7 are formed in the shape of short cylinders. The permanent magnets 6 and 7 are formed in the same shape.

[0023] The front board 3 is formed with magnet fixing holes 3a into which permanent magnets 6 are fixed. The magnet fixing holes 3a are circular holes recessed from the back surface of the front board 3 toward the front surface. The inner diameter of the magnet fixing holes 3a is approximately equal to the outer diameter of the permanent magnets 6. The magnet fixing holes 3a are formed near the four corners of the front board 3, which is formed in the shape of a rectangular flat plate. The back board 4 is formed with magnet fixing holes 4a into which permanent magnets 7 are fixed. The magnet fixing holes 4a are circular holes recessed from the front surface of the back board 4 toward the back surface. The inner diameter of the magnet fixing holes 4a is approximately equal to the outer diameter of the permanent magnets 7. The magnet fixing holes 4a are formed near the four corners of the back board 4, which is formed in the shape of a rectangular flat plate.

[0024] Permanent magnet 6 is adhesively fixed in magnet fixing hole 3a. Permanent magnet 7 is adhesively fixed in magnet fixing hole 4a. In other words, permanent magnets 6 and 7 are arranged near the four corners of exhibition board 1, which is formed in the shape of a rectangular flat plate. When viewed from the thickness direction of exhibition board 1, magnet fixing hole 3a and magnet fixing hole 4a overlap. In other words, when viewed from the thickness direction of exhibition board 1, permanent magnet 6 and permanent magnet 7 overlap.

[0025] A portion of the permanent magnet 6 protrudes from the rear surface of the front board 3 to the rear side. The portion of the permanent magnet 6 protruding from the rear surface of the front board 3 to the rear side forms a first protrusion 6a (see FIGS. 1(C) and 1(D)). A portion of the permanent magnet 7 protrudes from the front surface of the back board 4 to the front side. The portion of the permanent magnet 7 protruding from the front surface of the back board 4 to the front side forms a second protrusion 7a (see FIGS. 1(C) and 1(D)). The length of the first protrusion 6a (i.e., the amount of protrusion of the permanent magnet 6 from the rear surface of the front board 3) is equal to the length of the second protrusion 7a (i.e., the amount of protrusion of the permanent magnet 7 from the front surface of the back board 4). For example, the length of the first protrusion 6a and the length of the second protrusion 7a are approximately 0.1 (mm) to 0.5 (mm).

[0026] The thickness of the intermediate board 5 is thicker than the sum of the lengths of the first protrusion 6a and the second protrusion 7a. The intermediate board 5 is formed with an exhibit placement hole 5a in which a pick 2 is placed. The exhibit placement hole 5a penetrates the intermediate board 5 in the thickness direction of the intermediate board 5. The exhibit placement hole 5a is formed in the center of the intermediate board 5. The shape of the exhibit placement hole 5a is formed to be approximately the same as the outer shape of the pick 2. The intermediate board 5 is formed in the shape of a rectangular flat plate, and on two long sides thereof, cutout portions 5b are formed that are cut out toward the inside of the intermediate board 5. The intermediate board 5 is decorated with a predetermined design D1. For example, multiple characters are printed on the surface of the intermediate board 5 as the design D1.

[0027] The intermediate board 5 is formed with through holes 5c penetrating the intermediate board 5 in the thickness direction of the intermediate board 5. The through holes 5c are circular holes. The inner diameter of the through holes 5c is approximately equal to the outer diameter of the permanent magnets 6 and 7. The through holes 5c are formed near the four corners of the intermediate board 5, which is formed in the shape of a rectangular flat plate. As shown in FIGS. 1(C) and 1(D), one side of the through holes 5c (specifically, a portion of the front side of the through holes 5c) forms a first engagement hole 5d with which the first protrusion 6a engages. The other side of the through holes 5c (specifically, a portion of the back side of the through holes 5c) forms a second engagement hole 5e with which the second protrusion 7a engages. That is, the intermediate board 5 is formed with the first engagement hole 5d with which the first protrusion 6a engages and the second engagement hole 5e with which the second protrusion 7a engages, and the first engagement hole 5d and the second engagement hole 5e are connected.

[0028] In this embodiment, the surface board 3, the back board 4, and the intermediate board 5 are integrated by the magnetic attraction force generated between the permanent magnets 6 and 7. That is, the intermediate board 5 and the pick 2 are held between the surface board 3 and the back board 4 by the magnetic attraction force generated between the permanent magnets 6 and 7. As described above, the thickness of the intermediate board 5 is greater than the sum of the lengths of the first protrusion 6a and the second protrusion 7a. Therefore, the permanent magnets 6 and 7 are spaced apart in the thickness direction of the intermediate board 5 (i.e., the thickness direction of the display board 1), and are not in contact with each other. To separate the integrated surface board 3, back board 4, and intermediate board 5, a user inserts their fingertips into the notch 5b of the intermediate board 5.

[0029] (Main effect of this form) As described above, in this embodiment, the front board 3, the back board 4, and the intermediate board 5 are integrated together by the magnetic attraction force generated between the permanent magnets 6 and 7. Therefore, in this embodiment, the front board 3, the back board 4, and the intermediate board 5 can be integrated more easily than when, for example, the front board 3, the back board 4, and the intermediate board 5 are integrated together by fixing them together with screws.

[0030] In this embodiment, the first protrusion 6a of the permanent magnet 6 protrudes from the back surface of the front board 3 to the back side, the second protrusion 7a of the permanent magnet 7 protrudes from the front surface of the back board 4 to the front side, and the intermediate board 5 is formed with a first engagement hole 5d into which the first protrusion 6a engages and a second engagement hole 5e into which the second protrusion 7a engages. Therefore, in this embodiment, when the front board 3, the back board 4, and the intermediate board 5 are integrated, the front board 3 and the intermediate board 5 can be easily positioned by the first protrusion 6a and the first engagement hole 5d, and the back board 4 and the intermediate board 5 can be easily positioned by the second protrusion 7a and the second engagement hole 5e. Therefore, in this embodiment, the front board 3, the back board 4, and the intermediate board 5 can be more easily integrated.

[0031] In addition, in this embodiment, the first protrusion 6a and the first engagement hole 5d can prevent misalignment between the front board 3 and the intermediate board 5, and the second protrusion 7a and the second engagement hole 5e can prevent misalignment between the back board 4 and the intermediate board 5. Therefore, in this embodiment, it is possible to prevent misalignment between the front board 3, the intermediate board 5, and the back board 4, which are integrated by magnetic attraction.

[0032] Furthermore, in this embodiment, the intermediate board 5 is formed with a first engagement hole 5d that engages with the first protrusion 6a that protrudes from the back surface of the front board 3, and a second engagement hole 5e that engages with the second protrusion 7a that protrudes from the front surface of the back board 4, so even if the thickness of the intermediate board 5 increases, it is possible to reduce the distance between the permanent magnets 6 and 7 in the thickness direction of the display board 1. Therefore, in this embodiment, even if the thickness of the intermediate board 5 increases, it is possible to properly hold the intermediate board 5 between the front board 3 and the back board 4 by the magnetic attractive force generated between the permanent magnets 6 and 7.

[0033] In this embodiment, the thickness of the intermediate board 5 is greater than the sum of the lengths of the first protrusions 6a and the second protrusions 7a, and the permanent magnets 6 and 7 are not attached to each other. Therefore, in this embodiment, the integrated front board 3, back board 4, and intermediate board 5 can be more easily separated than when the permanent magnets 6 and 7 are attached to each other.

[0034] In this embodiment, one side portion of the through hole 5c penetrating the intermediate board 5 in the thickness direction of the intermediate board 5 is the first engagement hole 5d, and the other side portion of the through hole 5c is the second engagement hole 5e. Therefore, in this embodiment, it is easy to form the first engagement hole 5d and the second engagement hole 5e in the intermediate board 5.

[0035] (Example of display board changes) Fig. 4(A) is a front view of an exhibition board 1 according to another embodiment of the present invention, and Fig. 4(B) is a cross-sectional view of the KK section of Fig. 4(A). Fig. 5(A) is a front view of the surface board 3 shown in Fig. 4, Fig. 5(B) is a front view of the intermediate board 5 shown in Fig. 4, and Fig. 5(C) is a front view of the back board 4 shown in Fig. 4. In Figs. 4 and 5, the same reference numerals are used to designate the same components as those in the above-described embodiments.

[0036] In the above-described embodiment, as shown in Figures 4 and 5, a predetermined design D2 may be applied to the front board 3, a predetermined design D3 may be applied to the back board 4, and a predetermined design D4 may be applied to the intermediate board 5. For example, a plurality of characters may be printed as design D2 on the front surface of the front board 3, a plurality of characters may be printed as design D3 on the front surface of the back board 4, and a plurality of figures may be printed as design D4 on the front surface of the intermediate board 5. In this modified example, when the display board 1 is viewed from the front (when viewed from the front side), the design D2, the design D3, and the design D4 do not overlap. Also, in this modified example, for example, the thickness of the front board 3, the thickness of the back board 4, and the thickness of the intermediate board 5 are all equal.

[0037] In this modified example, the intermediate board 5 does not have an exhibit placement hole 5a, but the intermediate board 5 may have an exhibit placement hole 5a. If the intermediate board 5 does not have an exhibit placement hole 5a, the exhibition board 1 with the designs D2 to D4 itself becomes the exhibit. When the exhibition board 1 is viewed from the front, a part of one of the designs D2 to D4 may overlap a part of another of the designs D2 to D4. Furthermore, a photograph, a painting, or the like may be printed on the surface of the intermediate board 5. Furthermore, a promotional poster, or a predetermined character, or the like may be printed on the surface of the intermediate board 5. Furthermore, a frame-shaped pattern, such as a rectangle, may be printed on the surface of the front board 3 or the surface of the back board 4.

[0038] In this modified example, the designs D2 to D4 are applied to the front board 3, the back board 4, and the intermediate board 5, which makes it possible to enhance the design of the exhibition board 1. Furthermore, in this modified example, the front board 3 integrated with the back board 4 and the intermediate board 5 can be replaced with a front board 3 with a different design, the back board 4 integrated with the front board 4 and the intermediate board 5 can be replaced with a back board 4 with a different design, or the intermediate board 5 integrated with the front board 3 and the back board 4 can be replaced with an intermediate board 5 with a different design, thereby making it possible to change the design of the exhibition board 1 to a variety of designs. Therefore, it is possible to change the design of the exhibition board 1 to a design that suits the user's preferences.

[0039] (Other embodiments) If the above-described embodiments and modified examples are referred to as "the above-described embodiments, etc.", in the above-described embodiments, etc., the front board 3, the back board 4, and the intermediate board 5 may be made of glass. Also, in the above-described embodiments, etc., the front board 3 and the intermediate board 5 may be made of a translucent base material, and the back board 4 may be made of a translucent or opaque base material. Also, in the above-described embodiments, etc., the intermediate board 5 may be made of an opaque base material. In the above-described modified examples, when the intermediate board 5 is made of an opaque base material, the design D3 is not applied to the back board 4.

[0040] In the above-described embodiments, the thickness of the intermediate board 5 may be equal to the sum of the lengths of the first protrusions 6a and the second protrusions 7a, and the permanent magnets 6 and 7 may be in contact with each other. Furthermore, in the above-described embodiments, the first engagement holes 5d and the second engagement holes 5e do not have to be connected. That is, instead of forming the through holes 5c in the intermediate board 5, the first engagement holes 5d may be recessed from the front surface of the intermediate board 5 toward the back surface, and the second engagement holes 5e may be recessed from the back surface of the intermediate board 5 toward the front surface. Furthermore, in the above-described embodiments, the cutouts 5b do not have to be formed in the intermediate board 5.

[0041] In the above-described embodiment, an exhibit other than the pick 2 may be placed in the exhibit placement hole 5a of the intermediate board 5. For example, a photograph, a card, or the like may be placed in the exhibit placement hole 5a. In this case, the exhibit placement hole 5a is formed in a shape that corresponds to the shape of the exhibit to be placed. Furthermore, in the above-described embodiment, the number of permanent magnets 6, 7 that the exhibition board 1 has may be two or three, or may be five or more. When the exhibition board 1 has two permanent magnets 6 and two permanent magnets 7, the permanent magnets 6, 7 are placed near two of the four corners of the exhibition board 1 that are arranged diagonally.

[0042] In the above-described embodiments, the display board 1 may be formed in a quadrilateral flat plate shape other than a rectangle. The display board 1 may also be formed in a polygonal flat plate shape other than a rectangle, such as a triangle, or in a polygonal flat plate shape other than a polygon, such as a circle or ellipse. The display board 1 may also be formed in a three-dimensional shape such as a rectangular parallelepiped, or in a curved plate shape. In the above-described embodiments, the permanent magnets 6 and 7 may be magnets other than rare earth magnets. In the above-described embodiments, the permanent magnets 6 and 7 may also be formed in the shape of a short polygonal column. In the above-described embodiments, the display board 1 may also be used as a key holder or a novelty item. [Explanation of symbols]

[0043] 1 display board 2 Pick (exhibit) 3 Surface board 3a Magnet fixing hole 4 Back Board 4a Magnet fixing hole 5 Intermediate Board 5a Exhibit placement hole 5c through hole 5d First engagement hole 5e 2nd engagement hole 6 Permanent magnet (surface permanent magnet) 6a 1st protrusion 7 Permanent magnet (rear side permanent magnet) 7a Second protrusion D1~D4 Design

Claims

1. The magnet comprises a surface board formed of a transparent or semi-transparent base material, a back board disposed on the back side of the surface board, an intermediate board sandwiched between the surface board and the back board, a surface-side permanent magnet which is a permanent magnet fixed to the surface board, and a back-side permanent magnet which is a permanent magnet fixed to the back board, The surface board is formed with magnet fixing holes to which the surface-side permanent magnets are fixed, The rear board has magnet fixing holes for fixing the rear permanent magnets, a part of the front-side permanent magnet is a first protrusion that protrudes from the rear surface of the front board to the rear side, a part of the rear surface-side permanent magnet is a second protrusion that protrudes from the surface of the rear surface board to the front side, The intermediate board is formed with a first engagement hole with which the first protrusion engages and a second engagement hole with which the second protrusion engages, An exhibition board characterized in that the front board, the back board, and the intermediate board are integrated by the magnetic attraction force generated between the front side permanent magnet and the back side permanent magnet.

2. a thickness of the intermediate board is greater than the sum of the length of the first protrusion and the length of the second protrusion; 2. The display board according to claim 1, wherein the front-side permanent magnet and the back-side permanent magnet are spaced apart in the thickness direction of the intermediate board.

3. The intermediate board has a through hole formed therein, the through hole passing through the intermediate board in a thickness direction of the intermediate board, 3. The display board according to claim 1, wherein one side of the through hole is the first engagement hole, and the other side of the through hole is the second engagement hole.

4. 3. The display board according to claim 1, wherein the intermediate board has an exhibit placement hole formed therein for placing an exhibit therein.

5. 3. The display board according to claim 1, wherein the surface board and the intermediate board have a predetermined design.

6. the intermediate board is formed of a transparent or translucent substrate; 6. The display board according to claim 5, wherein the back board has a predetermined design.

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