JP5105283B2 - Design plate, method for producing design plate, and display device - Google Patents

Description

  The present invention relates to a design plate that is used in a display device or the like and transmits irradiated illumination light, a method for manufacturing the design plate, and a display device including the design plate.

  Conventionally, time display units in watches, speed display units in automobiles, mobile phone displays, etc. are equipped with display devices that transmit illumination light from the inside to the outside in order to perform their intended functions. There is a case to let you. In particular, in recent years, in order to give a high-class feeling to the display portion, a display device using a design plate made of metal as a design plate that transmits illumination light has been disclosed. Specifically, as a vehicle indicator, it fits into each hole of the dial plate with a dial plate that is a main body with a plurality of holes corresponding to the characters to be displayed and a substantially plate-like member attached to the dial plate A design plate that includes a light guide having a graduation portion and a light source that emits illumination light toward the design plate from the side on which the light guide is attached has been proposed (for example, Patent Documents). 1). And in such a vehicle display, the illumination light from a light source is permeate | transmitted to a light guide, and is irradiated to the other side through the hole of a main body by the scale part of this light guide. In addition, since the scale portion of the light guide is fitted in the hole of the main body, it is possible to prevent the illumination effect from being deteriorated due to the entry of foreign matter from the outside and blocking it.

Further, a manufacturing method has been proposed in which a plurality of small holes are formed by electroforming and photolithography in the design plate as described above (see, for example, Patent Document 2). By having a large number of through-holes having a thin plate shape as in Patent Document 2 and having a minute diameter, the presence of the through-holes cannot be visually confirmed, and the design can be improved.
JP 2007-85858 A JP 2003-107173 A

  However, the design plate of Patent Document 1 has a problem that the light guide attached to the main body falls off due to external impact or deformation of the main body. In order to prevent this, it is conceivable that the main body and the light guide are bonded together, or the both are put together using a jig, but in the case of Patent Document 2, the main body itself is a thin plate, Since the through hole is also very small, it has been difficult to bond or mechanically fix it with a jig. For this reason, when a minute through-hole is formed in the design plate, the light guide cannot be provided inside the through-hole, and there is a case where a foreign matter enters the inside and the illumination effect is lowered. .

  The present invention has been made in view of the above-described circumstances. Even if the through hole has a small diameter, the illumination light is transmitted through the through hole while preventing foreign matter from entering the through hole. The present invention provides a design plate that can be illuminated and illuminated, a method for manufacturing the design plate, and a display device.

In order to solve the above problems, the present invention proposes the following means.
In the present invention, a plurality of through-holes communicating in the thickness direction are formed in a substantially plate-shaped main body member in which a plurality of laminated plates are laminated in the thickness direction, and illumination light is irradiated from one side to thereby penetrate the through-hole. A design plate that transmits light to the other side through a hole, wherein the through hole is filled with a light guide capable of guiding illumination light, and the side wall is locked in the thickness direction. An engaging portion is provided, and the engaging portion is a concave portion or a convex portion formed on the side wall, and the through hole is formed by communicating a plurality of holes formed in each of the laminated plates. And the said recessed part or the convex part is formed by changing the diameter of the said hole in each said laminated board, It is characterized by the above-mentioned.

According to the design plate according to the present invention, the illumination light irradiated on one surface side enters the light guide filled in the through hole. The incident illumination light is guided through the light guide and emitted to the other side. In addition, since the through hole is filled with the light guide, it is possible to prevent the intrusion of the foreign matter, so that the illumination light incident on the through hole is not blocked by the invading foreign matter, and the illumination is performed. Decrease in effect can be prevented. Here, a locking portion is provided on the side wall of the through hole, and the light guide is locked in the thickness direction. For this reason, even if the diameter of the through hole is very small, the light guide filled inside can be reliably held.
Moreover, according to the design board concerning this invention, the light guide inside a through-hole will be hold | maintained in the state with which it filled reliably by being latched by a recessed part or a convex part.
Furthermore, according to the design plate according to the present invention, the concave portion or the convex portion is formed by the change in the diameter of the holes of the plurality of laminated plates, and the light guide is locked and held by the concave portion or the convex portion as described above. be able to.

Further, in the above design plate, it is more preferable that the concave portion or the convex portion is provided at a substantially center in the thickness direction of the through hole. According to the design plate according to the present invention, the concave portion or the convex portion is provided. Since the portion is provided substantially at the center in the thickness direction of the through-hole, the light guide can be reliably locked and held even if a force for pulling out toward one side or the other side is applied.

In the above design plate, it is more preferable that a plurality of the concave portions or the convex portions are provided in the thickness direction so as to be symmetric with respect to a substantially central portion in the thickness direction of the through hole. .
According to the design plate according to the present invention, a plurality of concave portions or convex portions are provided in the thickness direction so as to be symmetric with respect to a substantially central portion in the thickness direction of the through hole. Regardless of which direction the pulling force is applied to, the light guide can be reliably locked and held.

In the above design plate, the locking portion is a recess, and the depth of the recess is more preferably set to be less than ½ of the wavelength of illumination light to be irradiated.
According to the design plate according to the present invention, the depth of the concave portion serving as the locking portion is set to be less than ½ of the wavelength of the illumination light to be irradiated, so that the illumination light is reflected by the step forming the concave portion. Thus, it is possible to prevent the light from being emitted to the other side. For this reason, the illumination light incident on the through hole can be emitted to the other surface side without reducing the amount of light, and illumination can be performed effectively.

In the above design plate, the locking portion is a recess, and the depth of the recess is more preferably set to 1/2 or more of the wavelength of illumination light to be irradiated.
According to the design plate according to the present invention, the depth of the concave portion serving as the locking portion is set to 1/2 or more of the wavelength of the illumination light to be irradiated, so that the illumination irradiated to the step forming the concave portion Light can be reflected toward one side. That is, in the illumination light incident on the through-hole, a part of the illumination light incident on the side wall after being inclined with respect to the axial direction of the through-hole is restricted from being emitted to the other surface side. Can do. For this reason, it is possible to remove a part of the component of the illumination light emitted from the through hole to the other surface side and diffused and emitted with an inclination with respect to the axial direction of the through hole.

Further, the present invention is a method for producing a design plate in which a large number of through-holes communicating in the thickness direction are formed and light is transmitted to the other side through the through-hole by irradiating illumination light from one side. A main body forming step of forming a substantially plate-shaped main body member in which the through hole is formed; a locking portion forming step of forming a concave portion or a convex portion on a side wall of the through hole of the main body member; and an inside of the through hole A light guide body forming step in which a light guide body capable of guiding illumination light is softened by heating and press-fitted, and the main body is formed by laminating a plurality of laminated plates in the thickness direction during the main body forming step. By making a large number of holes formed in each of the laminated plates in communication with each other and forming the through holes, and changing the diameter of the holes in each of the laminated plates during the locking portion forming step The concave portion or the convex portion is formed .

  According to the design plate of the present invention, the main body member having a large number of through holes is formed in the main body forming step, and the concave portion or the convex portion is formed on the side wall of the through hole in the locking portion forming step. And by light-softening and press-fitting the light guide in the light guide formation step, the light guide is reliably filled even if the inside of the through hole has a small diameter. Further, since the heat-softened light guide body is filled so as to enter the concave portion or to enclose the convex portion, it is locked by the concave portion or the convex portion after cooling and hardening. It becomes. For this reason, as described above, even if the diameter of the through hole is very small, the light guide filled inside is securely held, and the light guide causes foreign matter to enter the through hole, resulting in an illumination effect. It is possible to manufacture a design plate capable of preventing the decrease in the thickness.

Moreover, the display apparatus of this invention is equipped with said design board and the light source which irradiates the said illumination light toward the said design board from the said one surface side, It is characterized by the above-mentioned.
According to the display device of the present invention, it is possible to effectively perform illumination by transmitting illumination light emitted from a light source through a design plate.

According to the design plate of the present invention, since the locking portion is provided in the through hole, even if the through hole has a small diameter, the light guide is securely fixed inside the through hole, and the guide is fixed. Illumination light can be transmitted through the through-hole while preventing the foreign body from entering the through-hole by the light body.
Moreover, according to the manufacturing method of the design board of this invention, even if a through-hole is a micro diameter by providing a latching | locking part formation process and a light guide formation process, a light guide is inside a through-hole. It is possible to manufacture a design plate that can be securely fixed and can be illuminated by transmitting illumination light through the through-hole while preventing the foreign material from entering the through-hole by the light guide.
Further, according to the display device of the present invention, by providing the design plate, illumination light emitted from the light source can be transmitted through the design plate and effectively illuminated.

  1 to 12 show an embodiment according to the present invention. As shown in FIG. 1, a display device 1 of this embodiment is used for a display unit of a watch, a speed display unit of an automobile, a display of a mobile phone, and the like. And a design plate 10 irradiated with the light L. As the light source 2, various sources such as a point light source that emits diffused light, a line light source, or a surface light source including a large number of LEDs can be used depending on the purpose. Moreover, as a display apparatus, it is good also as what provides the limiting means which shields irradiation to the design board 10 of the illumination light L in the fixed range between the design board 10 and the light source 2. FIG. Specifically, it is a shielding plate having an opening with a predetermined shape, a liquid crystal display that displays an image by a light source serving as a backlight, etc., and is transmitted through the design plate 10 within a range where a predetermined pattern or character shape is obtained. It is possible to illuminate the outside.

  As shown in FIGS. 2 and 3, the design plate 10 includes a substantially plate-shaped main body member 12 in which a large number of through-holes 11 that penetrate from the one surface 10 a side to the other surface 10 b side are formed in the thickness direction, 11 and a light guide 13 that guides the illumination light L. The main body member 12 is configured by laminating a plurality of substantially thin laminated plates 14 and, for example, three layers are laminated in this embodiment. As shown in FIG. 4, the diameter D <b> 11 of the through hole 11 can be changed in a timely manner according to the purpose of use, etc., but the illumination light L is preferably used while not letting the user notice the presence of the through hole 11. In order to transmit light, it is preferably 1 μm or more and 200 μm or less. Similarly, the interval W between the plurality of through-holes 11 can also be changed in a timely manner according to the purpose of use, but is preferably about 1 μm or more and 10 mm or less. In order to transmit the illumination light L without being noticed, it is preferably 200 μm or less.

  Moreover, the laminated board 14 made into three layers by this embodiment is the 2nd laminated board 14 formed with nickel, and the 1st laminated board 15 between the 1st laminated board 15, and the 2nd formed with copper. The laminated plate 16 and two types of laminated plates 14 formed of different materials. The material for forming the laminated plate 14 is not limited to nickel and copper, but is preferably a material having a different etching speed in the manufacturing process as will be described later, in order to form the recess 17 as a locking portion. For this reason, it is preferable that the second laminated plate 16 corresponding to the concave portion 17 is made of a material having a higher etching speed. Further, from the aesthetic point of view of the one surface 10a and the other surface 10b, the material forming the first laminate 15 exposed on the one surface 10a side and the other surface 10b side is preferably a material having a lower etching speed. Further, the thickness T15 of the first laminated plate 15 is about several μm to several mm. The first laminated plates 15 having two layers may have different thicknesses. Further, the thickness T16 of the second laminated plate 16 corresponds to the width of the recess 17 described later, and is about several μm to several hundred μm.

  Here, the first laminated plate 15 and the second laminated plate 16 are formed with a large number of holes 15a and 16a having different diameters. The holes 15a and 16a communicate with each other to form the through hole 11, and due to the difference in the diameters of the holes 15a and 16a, the side wall 11a of the through hole 11 corresponding to the lamination position of the second laminated plate 16 is formed. A concave portion 17 having a depth H is formed at a substantially central portion in the thickness direction. The depth H of the recess 17 will be described later.

  The light guide 13 is formed of a material such as a resin capable of guiding the illumination light L, and particularly has high transmittance in the visible light region such as acrylic and polycarbonate, and is heated in the manufacturing process as described later. It is preferably formed of a thermoplastic resin that can be softened. In the present embodiment, the light guide 13 is described as being formed of an acrylic resin. The light guide 13 also enters the recess 17 formed in the side wall 11a of the through-hole 11, whereby the light guide 13 is locked in the thickness direction using the recess 17 as a locking portion. Yes. Here, the size of the depth H of the concave portion 17 determined by the difference between the diameter of the hole 15a of the first laminated plate 15 and the diameter of the hole 16a of the second laminated plate 16 can be appropriately changed. However, the light guide 13 that has been softened by heating in the manufacturing process to be described later is surely filled, and after curing, the light guide 13 needs to be of a size that can be reliably locked, specifically, 100 μm or more. It is preferable that it is 1 mm or less.

  Next, the manufacturing method of the design board 10 of this embodiment is demonstrated based on FIGS. As shown in FIG. 4, first, as a preparation step, a substrate 21 for manufacturing the design plate 10 is prepared. As the substrate 21, a metal plate formed of a metal film on a metal plate such as stainless steel or a plate formed of a semiconductor or insulator such as silicon or quartz is selected. Next, as a main body forming step, a substantially plate-shaped main body member 12 having the through holes 11 is formed. That is, a photoresist 22 is deposited on the substrate 21 as shown in FIG. The thickness of the photoresist 22 is set to be equal to or greater than the final thickness of the main body member 12. The photoresist 22 may be either a positive type or a negative type. For example, when the negative type is used, as shown in FIG. 6, exposure is performed at a position where the through hole 11 is not formed by a mask, thereby forming a photoresist 22 only at a position where the through hole 11 is formed.

  Then, using the photoresist 22 as an electric mold, metal materials to be the first laminated plate 15 and the second laminated plate 16 are laminated. That is, as shown in FIG. 7, first, nickel that becomes the first laminated plate 15 positioned closest to the surface 10a is deposited by electroforming until a predetermined thickness is reached. Next, copper to be the second laminated plate 16 is deposited on the first laminated plate 15 already formed by electroforming until a predetermined thickness is reached. By repeating this, a three-layer laminate 14 composed of two layers of the first laminate 15 and a single layer of the second laminate 16 is formed on each laminate 14 according to the pattern of the photoresist 22. The holes can be stacked so that the through holes 11 are formed in communication. When the lamination of all the laminated plates 14 is completed, the photoresist 22 is removed and the main body member 12 is removed from the substrate 21 as shown in FIG.

  Next, as a locking portion forming step, a recess 17 is formed as a locking portion on the side wall 11 a of the through hole 11 in the main body member 12. That is, etching is performed using an etchant having different etching speeds for the material forming the first laminated plate 15 and the material forming the second laminated plate 16. Here, an etchant having a higher etching speed is selected for the material forming the second laminated plate 16 in which the recesses 17 are formed than in the material forming the first laminated plate 15. Specifically, when the first laminated plate 15 is made of nickel and the second laminated plate 16 is made of copper as in the present embodiment, the etchant may be, for example, an ammonium persulfate aqueous solution and ammonia water. Is selected. By selecting such an etchant, the etching speed of the first laminated plate 15 exposed on the one surface 10a and the other surface 10b becomes lower, so that the influence of the etching on the one surface 10a and the other surface 10b is small. However, it is preferable. As a result, as shown in FIG. 9, in the second laminated plate 16, the exposed inner surface of the hole 16a is significantly etched, and the outer diameter of the hole 16a is increased. For this reason, the diameter of the hole 16a of the 2nd laminated board 16 becomes larger with respect to the diameter of the hole 15a of the 1st laminated board 15 which comprises the through-hole 11 by this, Thereby, the 2nd laminated board 16 and The concave portion 17 is formed as a locking portion at a substantially central position in the corresponding thickness direction.

  Next, as a light guide formation process, the light guide 13 is formed inside the through hole 11 of the main body member 12. That is, as shown in FIG. 10, the main body member 12 is placed between the pressure plates 20 a and 20 b disposed on the pressurizer 20. Here, in FIG. 10, the main body member 12 is placed with the surface on the other surface 10b side as the lower side. Then, a plate-like member 23 made of acrylic serving as the light guide 13 is placed on the main body member 12. The member thickness of the plate member 23 is determined by the depth of the through hole 11. And in this state, it heats to the temperature which softens the plate-shaped member 23. FIG. Next, the upper pressure plate 20a is gradually lowered while the main body member 12 and the plate-like member 23 are sandwiched between the pressure plates 20a and 20b and pressurized with a predetermined pressure. As a result, the heat-softened plate-like member 23 is deformed and is press-fitted toward the other surface 10 b through each through-hole 11 of the main body member 12, and also enters the recess 17. In addition, the press-fit of the plate-shaped member 23 can be made easy by making the atmosphere containing the main body member 12 and the plate-shaped member 23 into a vacuum atmosphere in this case. Then, as shown in FIG. 11, the pressurization is terminated when the upper pressure plate 20a is lowered until the plate-like member 23 reaches the other surface 10b side of the main body member 12 as it is. Finally, the main body member 12 and the plate-like member 23 are taken out from the pressurizer 20 to produce the design plate 10 as shown in FIGS.

  In the design plate 10 as shown in FIGS. 2 and 3 manufactured as described above, as shown in FIG. 1, the illumination light L from the light source 2 is guided from the surface 10 a side to the inside of the through hole 11. When it is incident on 13, the illumination light L is guided to the light guide 13 and irradiated to the other surface 10b side. Further, since the through-hole 11 is filled with the light guide 13, it is possible to prevent the intrusion of the foreign matter, whereby the illumination light L incident on the through-hole 11 is shielded by the foreign matter that has entered. There is no, and it can prevent the lighting effect from deteriorating. Here, a concave portion 17 which is a locking portion is provided on the side wall 11a of the through hole 11, and the light guide 13 is locked in the thickness direction. For this reason, even if the diameter of the through hole 11 is very small, the light guide 13 filled inside can be reliably held. In particular, in the present embodiment, the concave portion 17 is formed substantially at the center in the thickness direction corresponding to the position in the thickness direction of the second laminated plate 16, so either the one surface 10 a side or the other surface 10 b side. Even if the force of pulling out is applied, the light guide 13 can be reliably locked and held. Furthermore, as shown in FIG. 12, even if the entire surface 10a side or the other surface 10b side is curved as a result of external force acting on the design plate 10, the thickness is approximately at the center in the thickness direction. By being provided, the light guide 13 can be similarly locked.

  In addition, as the depth H of the recessed part 17, there exist the following different effects by the relationship with the wavelength of the illumination light L emitted from the light source 2. FIG. That is, when the depth H of the concave portion 17 is set to be less than ½ of the wavelength of the illumination light L of the light source 2 to be used, the illumination light L is reflected by the step forming the concave portion 17 and the other surface 10b side. Can be prevented from being emitted. For this reason, the illumination light L incident on the through-hole 11 can be emitted to the other surface 10b side without reducing the amount of light, and illumination can be performed effectively.

  On the other hand, when the depth H of the concave portion 17 is set to ½ or more of the wavelength of the illumination light L of the light source 2 to be used, the illumination light L irradiated to the step forming the concave portion 17 is directed toward the surface 10a. Can be reflected. That is, in the illumination light L incident on the through hole 11, a part of the illumination light L incident on the side wall 11 a after being inclined with respect to the axial direction of the through hole 11 is emitted to the other surface 10 b side. Can be regulated. For this reason, it is possible to remove a part of the component emitted from the illumination light L emitted from the through hole 11 toward the other surface 10b side while being inclined and diffused with respect to the axial direction of the through hole 11. When a limiting means such as a shielding plate is provided between the light source 2 and the design plate 10, the illumination light L from the light source 2 passes through only an opening range representing characters and the like formed on the shielding plate and the design plate. However, by setting the depth H of the concave portion 17 to ½ or more of the wavelength of the illumination light L as described above, it is possible to suppress diffusion and exit, and to open the shielding plate. Illumination light can be emitted without forming a virtual image in a range corresponding to the shape.

  Moreover, in the said embodiment, although the recessed part 17 shall be provided in the thickness direction approximate center, it is not restricted to this. If the concave portion 17 is formed at least in any position of each through hole 11, the light guide 13 filled in the through hole 11 can be locked. Further, a plurality of through holes 11 may be provided in the thickness direction. By providing a plurality of light guides 13 in this manner, the light guide 13 can be made more difficult to pull out. Moreover, as shown in FIG. 13, the design board 30 which has the some recessed part 17 in each through-hole 11 is the same as the above by laminating | stacking the 1st laminated board 15 and the 2nd laminated board 16 alternately, for example. It can be manufactured by the process. Also in this case, since the plurality of recesses 17 in each through-hole 11 are provided symmetrically with respect to the substantially center in the thickness direction, a force for pulling out toward the one surface 30a side or the other surface 30b side acts. Even if it does, it can latch and hold | maintain the light guide 13 reliably.

  Further, in the above embodiment, the main body member 12 is formed by laminating the laminated plates 14 of different materials, and the concave portion 17 is thereby formed. However, the present invention is not limited to this, and one material is used. It is good also as what is formed by. Moreover, although the recessed part 17 shall be formed in the through-hole 11 as a latching | locking part, it is not restricted to this, What is necessary is just to latch the light guide 13 in the thickness direction, for example, it penetrates It is good also as what the convex part is formed in the hole 11. FIG. In addition, since the direction which formed the recessed part 17 as the latching | locking part in the through-hole 11 does not narrow the cross section of the through-hole 11, it is effective at the point which can transmit the illumination light L effectively.

  As mentioned above, although embodiment of this invention was explained in full detail with reference to drawings, the concrete structure is not restricted to this embodiment, The design change etc. of the range which does not deviate from the summary of this invention are included.

1 is an overall view showing an outline of a display device according to an embodiment of the present invention. It is a perspective view which shows the design board of embodiment of this invention. It is sectional drawing which shows the design board of embodiment of this invention. It is explanatory drawing of a preparation process in the manufacturing process of the design board of embodiment of this invention. It is explanatory drawing at the time of depositing a photoresist by a main body formation process in the manufacturing process of the design board of embodiment of this invention. In the manufacturing process of the design board of this embodiment of this invention, it is explanatory drawing at the time of exposing a photoresist by a main body formation process. In the manufacturing process of the design board of this embodiment of this invention, it is explanatory drawing at the time of performing electroforming in the main body formation process. In the manufacturing process of the design board of this embodiment of this invention, it is explanatory drawing at the time of removing a board | substrate and a photoresist at a main body formation process. It is explanatory drawing of a latching | locking part formation process in the manufacturing process of the design board of embodiment of this invention. It is explanatory drawing of a light guide formation process in the manufacturing process of the design board of embodiment of this invention. It is explanatory drawing of a light guide formation process in the manufacturing process of the design board of embodiment of this invention. In the design board of embodiment of this invention, it is explanatory drawing which shows the latching state by a latching | locking part. It is sectional drawing which shows the design board of the modification of embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Display apparatus 2 Light source 10, 30 Design board 11 Through-hole 11a Side wall 12 Main body member 13 Light guide 14 Laminated board 17 Recessed part (locking part)
L Illumination light

Claims (7)

A substantially plate-like main body member in which a plurality of laminated plates are laminated in the thickness direction is formed with a large number of through holes communicating in the thickness direction, and irradiation with illumination light from one surface side allows the other surface to pass through the through holes. A design plate that transmits light to the side,
The through hole is filled with a light guide capable of guiding illumination light, and a locking portion for locking the light guide in the thickness direction is provided on the side wall ,
The locking portion is a concave portion or a convex portion formed on the side wall,
The through-hole is formed by communication of a large number of holes formed in each of the laminated plates, and the concave portion or the convex portion is formed by changing the diameter of the hole in each of the laminated plates. A design board characterized by this. In the design board according to claim 1 ,
The said recessed part or convex part is provided in the thickness direction approximate center of the said through-hole, The design board characterized by the above-mentioned. In the design board according to claim 1 or claim 2 ,
The design plate according to claim 1, wherein a plurality of the concave portions or the convex portions are provided in the thickness direction so as to be symmetric with respect to a substantially center of the through hole in the thickness direction. In the design board according to any one of claims 1 to 3 ,
The design plate according to claim 1, wherein the engaging portion is a concave portion, and the depth of the concave portion is set to be less than ½ of the wavelength of illumination light irradiated. In the design board according to any one of claims 1 to 3 ,
The design plate according to claim 1, wherein the locking portion is a concave portion, and the depth of the concave portion is set to ½ or more of the wavelength of illumination light irradiated. A number of through-holes communicating in the thickness direction are formed, and a method for producing a design plate that transmits light to the other side through the through-hole by irradiating illumination light from one side,
A main body forming step of forming a substantially plate-shaped main body member in which the through hole is formed;
A locking portion forming step of forming a concave portion or a convex portion on the side wall of the through hole of the main body member;
A light guide forming step of heat-softening and press-fitting a light guide capable of guiding illumination light into the through hole , and
During the main body forming step, the main body member is formed by laminating a plurality of laminated plates in the thickness direction, and the through holes are formed by communicating a plurality of holes formed in each of the laminated plates,
The manufacturing method of the design board characterized by forming the said recessed part or convex part by changing the diameter of the said hole in each said laminated board in the case of the said latching | locking part formation process . The design board according to any one of claims 1 to 5 ,
And a light source that irradiates the illumination light toward the design plate from the one surface side.

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