Abstract:
Disclosed is a display structure in which an insertion opening, slide grooves, a first fitting portion and a ridged portion along which the display plate bends when the display plate is bent arranged in the loading sections of a support body in a suitable manner to ensure that when the display plate is inserted into or removed from the loading unit, a force is exerted on both sides of the display plate in either the direction from the display surface side to the rear surface side thereof or the direction from the rear surface side to the display surface side thereof, and a force is exerted in another direction at the center region of the display plate. As a result of configuring in this manner, the display plate deforms so that the entire display surface side comes to have a convex or concave shape, thereby allowing the display plate to be attached to or detached from the support body without forcible localized deformation of the display plate.

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is a national stage application under 35 U.S.C. 371 of PCT Application No. PCT/JP2009/003692 having an international filing date of 3 Aug. 2009, which designated the United States, which PCT application claimed the benefit of Japanese Patent Application No. 2008-290848 filed 13 Nov. 2008, and International Application No. PCT/JP2009/060863 filed Jun. 15, 2009, the entire disclosure of each of which is hereby incorporated by reference. 
     FIELD OF THE INVENTION 
     The present invention relates to a display structure having a display board and a support body for supporting the display board. 
     BACKGROUND OF THE INVENTION 
     Conventionally, a display structure having a display board and a support body for supporting the display board are known. For example, Patent Document 1 discloses a technique related to attachment/detachment of a display board with respect to a support body. 
       FIGS. 18(   a ) and  18 ( b ) each schematically shows the configuration of a telephone set  902  as an example of a conventional display structure. 
     In the telephone set  902  illustrated in  FIGS. 18(   a ) and  18 ( b ), a sheet  908  displaying characters and the like is a display board. A body  909 , which supports the sheet  908 , is a support body. 
     As shown in  FIG. 18(   b ), the sheet  908 , which has deformation and shape restoration properties, is inserted through a sheet insertion port  907 . When the sheet  908  contacts a stopper projection  909   a , the sheet  908  is deformed. Then, with the deformed portion moved from the leading side to the trailing side, the sheet  908  is sent into the gap between a transparent member  910  and a plurality of projections  911   b  projecting from a sheet guide  911 . 
     The sheet  908  includes a holding portion  908   b  formed at the trailing end of the sheet  908  and a small hole  908   c , that is, a hole engaged with the stopper projection  909   a , which is formed on the leading side of the holding portion  908   b.    
     When the sheet  908  is inserted into the body  909  and the small hole  908   c  reaches the position corresponding to the stopper projection  909   a , the shape restoring property of the sheet  908  causes the stopper projection  909   a  to be inserted into the small hole  908   c . In this manner, the sheet  908  is mounted in the body  909 . 
     The holding portion  908   b  may be held by a user&#39;s fingers and depressed by the user of the telephone set  902 . This disengages the stopper projection  909   a  from the small hole  908   c . The holding portion  908   b  is then pulled outward so that the sheet  908  is removed from the body  909 . 
     PRIOR ART DOCUMENT 
     Patent Document 
     
         
         Patent Document 1: Japanese Laid-Open Utility Model Publication No. 4-137640 
       
    
     SUMMARY OF THE INVENTION 
     As has been described, in the conventional display structure including the display board and the support body for supporting the display board, the display board having the deformation/shape restoration properties has the holding portion, which is arranged at the trailing edge of the display board, and the stopper engagement hole, which is located on the leading side of the holding portion. 
     The support body includes a mounting portion in which the display board is mounted. The mounting portion has an insertion port through which the display board is inserted, an insertion space, which is a space in which the display board is arranged after having been inserted, and an engagement projection for retaining the display board. 
     The insertion space has relatively large room in the vicinity of the insertion port in order to allow the display board to move in the thickness direction of the display board when the display board is inserted. For the rest of the insertion space other than the vicinity of the insertion port, the insertion space has only relatively narrow room for allowing the display board to move in the thickness direction of the display board when the display board is inserted. 
     The engagement projection is arranged in the vicinity of the center of the insertion space near the insertion port. As viewed through the insertion port, the engagement projection projects in such a manner as to shield the narrow portion of the insertion space, which is the portion other than the vicinity of the insertion port. 
     As a result, when the display board is inserted into the mounting portion, a part of intense deformation moves in a wave-like manner from the leading side to the trailing side of the display board as the display board moves forward. 
     As a result, conventionally, the material and the shape of the display board must have improved deformation and shape restoration properties, which allow locally intense deformation of the display board and restoration of the original shape of the display board. 
     In other words, in the conventional display structure, the display board has to have sufficient deformation and sufficient shape restoration properties. Specifically, if the display board has insufficient deformation property, insertion of the display board in the insertion space becomes incomplete. 
     The deformation property of the display board is insufficient if, for example, the display board is formed of hard vinyl chloride or polypropylene and has small dimensions along its three axes, which are a thickness of approximately 0.5 mm, a width of approximately 7 mm, and a length of approximately 6 mm. In this case, the display board as a whole may be deformed in a moderately convex or concave shape. However, it is difficult to cause local intense deformation in the display board. This makes it difficult to mount the display board in the support body having the above-described conventional configuration. 
     If such a display board is forcibly inserted into the conventional support body, the engagement projection may damage the display board or the display board may damage the engagement projection. 
     If the display board is formed of metal such as copper and has small three dimensions, which are a thickness of approximately 0.2 mm, a width of approximately 7 mm, and a length of approximately 6 mm, it is difficult to cause local intense deformation in the display board. This also makes it difficult to mount the display board in the support body having the above-described conventional configuration. 
     Further, in the conventional display structure, the display board must include the holding portion for holding by a user&#39;s fingers. However, it is difficult to form such a holding portion for holding by a user&#39;s fingers in the above-described small-sized display board. 
     In this case, even if the display board is sufficiently soft and thus can be mounted in the support body, it is difficult to remove the display board after mounting. 
     Accordingly, it is an objective of the present invention to provide a display structure and a support body that allow for sufficient fitting between a display board and the support body even if the display board is inserted into the support body without causing local intense deformation, and allow detachment of the display board without causing local intense deformation of the display board. 
     It is another objective of the present invention to provide the above-described display structure including a display board that does not need a holding portion that is held by fingers and support body. 
     To solve the above-described problem, the display structure of the present invention is a display structure having a display board and a support body for supporting the display board, wherein the support body has a mounting portion in which the display board is mounted, wherein the mounting portion has a display window portion, an insertion port, an insertion space, and slide grooves, wherein the display window portion is a window through which the display board is displayed, the display window portion being a cutaway portion or a hole extending from an outer surface of the support body to the insertion space or formed of a transparent material in such a manner that the display board received in the insertion space is visible from a side corresponding to the outer surface of the support body, wherein the insertion port is an inlet port through which the display board is inserted into the insertion space, the insertion port having an opening in the outer surface of the support body at a position different from the position of the display window portion, wherein the insertion space is arranged at a position continuous from the insertion port, the insertion space being a space in which the display board is accommodated in a sliding manner, the insertion space being a space between a window side wall formed on a side corresponding to the display window portion and an opposing wall opposing the window side wall, wherein the slide grooves are side grooves arranged on both sides of the space between the window side wall and the opposing wall, the slide grooves being located on both sides of the insertion space, each of the slide grooves being a groove along which the display board is guided when inserted into the insertion space, wherein the window side wall or the opposing wall has a first fitting portion having a projection formed at a position over which at least a part of the display board passes when the display board is inserted into the insertion space, wherein the display board includes a display surface, a back surface, a leading portion, a trailing portion, two side portions, and a second fitting portion and has a deformation property and a shape restoration property, wherein the display surface and the back surface are arranged to be front and back, wherein the leading portion is a portion located forward when the display board is inserted into the insertion space in the sliding manner, wherein the trailing portion is a portion located on a trailing side when the display board is inserted into the insertion space in the sliding manner, wherein the two side portions are side portions arranged on both sides of the display board and in a space between the display surface and the back surface and a space between the leading portion and the trailing portion, each of the side portions being a portion located in the corresponding one of the slide grooves on both sides when the display board is inserted into the insertion space in the sliding manner, wherein the second fitting portion has a cutaway portion, a hole, or a recess that is fitted to the first fitting portion, wherein one of the window side wall and the opposing wall has a bulging portion rising in or in the vicinity of a middle position between the slide grooves formed on both sides, wherein the slide grooves on both sides, the first fitting portion, and the bulging portion are arranged in such a manner that, when the display board is inserted into the insertion space through the insertion port until the display board reaches an fitting position at which the second fitting portion and the first fitting portion become fitted to each other, a portion between the two side portions of the display board deforms in a convex or concave shape toward the display surface with respect to the side portions so as to avoid the projection of the first fitting portion due to the deformation property of the display board, wherein the second fitting portion and the first fitting portion become fitted to each other at the fitting position due to the shape restoration property of the display board, and wherein the display board has at least one of a number, a character, a code, an image, a color, and a pattern forming an indicator formed on at least the display surface. 
     In this configuration, by pressing the display board from the insertion port into the insertion space, forces acting in mutually opposite directions are applied to the display board between the vicinity of the side portions on both sides of the display board and the vicinity of a middle position between the side portions on both sides. 
     Specifically, by pressing the display board into the insertion space, one of forces acting in different directions, which are a force acting in a direction from the display surface to the back surface and a force acting in a direction from the back surface to the display surface, is applied to the vicinity of the side portions on both sides of the display board. The other one of the forces acting in the different directions is applied to the vicinity of a middle position of the display board. 
     This causes deformation of the display board as a whole in a convex or concave shape toward the display surface. 
     Accordingly, in the display structure of the present invention, even if the display board has insufficient deformation property and is difficult to deform intensely and locally, the display board as a whole is moderately bent from one of the side portions toward the other when inserted into the mounting portion, as long as the display board is capable of being moderately bent. This allows the display board to smoothly move beyond the projection of the first fitting portion. 
     As a result, using the shape restoration property of the display board, the second fitting portion of the display board and the first fitting portion of the support body are fitted to each other at the fitting position. 
     The insertion space may extend through the support body and the mounting portion may include insertion ports formed at both ends of the insertion space. 
     In this configuration, after the display board is pressed into and mounted in the mounting portion of the support body using fingers, for example, the display board can be separated from the support body by pressing the display board out from one of the insertion ports to the other using a nail or the like. 
     Alternatively, by pressing an additional display board into the mounting portion through one of the insertion ports, mounting of the display board and removal of the previously mounted display board from the other one of the insertion ports are accomplished simultaneously. 
     For example, if a display board is small in size and cannot have a finger holding portion as in the case of the above-described case, it is difficult to hold and pull out the display board by a user&#39;s fingers. However, in the display board of the present invention, the above-described configuration makes it easy for the mounted display board to be pressed out from one of the insertion ports to the other using a nail or an additional display board. 
     Removal of the display board will now be described. When a display board to be detached is located at the position (the fitting position) at which the second fitting portion of the display board and the first fitting portion of the support body are fitted to each other, the display board is pressed from one of the insertion ports, unlike when the display board is inserted to the fitting position of these fitting portions through an insertion port. This deforms the display board in a manner avoiding the projection of the first fitting portion using the deformation property of the display board, and the second fitting portion and the first fitting portion are disengaged from each other. In this manner, the display board is removed from the mounting portion. 
     In this case, each insertion port functions not only as an inlet port for insertion of the display board, but also as an outlet port for removal of the display board. Accordingly, the insertion port is an inlet/outlet port for insertion and removal of the display board, which is an opening for insertion and removal of the display board. 
     If the window side wall includes the bulging portion, the projection of the first fitting portion may be one of projections arranged at mutually opposing positions on or in the vicinities of the bottoms of the slide grooves on both sides of the insertion space on the side corresponding to the opposing wall. If the opposing wall includes the bulging portion, the projection of the first fitting portion may be one of projections arranged at mutually opposing positions on or in the vicinities of the bottoms of the slide grooves on both sides of the insertion space on the side corresponding to the window side wall. 
     In this configuration, the support body of the present invention may be shaped as illustrated in  FIG. 1(   g ) or  FIG. 2 , for example, and the display board may be shaped as illustrated in  FIG. 3 . 
     Specifically, to insert the display board into the insertion space, the display board is moved from the corresponding insertion port in a sliding manner in a predetermined direction along the slide grooves. After the display board contacts the projections of the first fitting portions when inserted, the display board as a whole bends along the bulging portion while deforming in a concave shape toward the bulging portion due to an effect of the bulging portion in a manner avoiding the projections of the first fitting portions. In this state, the display board is moved to the fitting position at which the second fitting portions and the first fitting portions are fitted to each other. 
     If the display board is thin and the second fitting portion of the display board is formed by a recess instead of a through hole, the recess has an insufficient thickness and is easily disengaged. Additionally, to form recesses, cutting or injection molding or punching after formation of a plate-like member having a large number of recesses must be carried out, which raises the manufacturing cost disadvantageously. 
     If the second fitting portion is formed as a through hole, punching of an inexpensive flat plate may be employed. However, if the through hole is arranged in the vicinity of the center of the space between the side portions on both sides, the hole is visible in an undesirable manner, which is disadvantageous from the view point of aesthetic appearance. 
     However, in the case of the display board corresponding to the support body of the above-described configuration, which is, specifically, the display board  300  illustrated in  FIG. 3  corresponding to the support body  100  illustrated in  FIG. 1(   g ) and  FIG. 2  or the display board  330  illustrated in  FIGS. 15(   c   1 ) to  15 ( c   3 ) corresponding to the support body  260  illustrated in  FIGS. 15(   b   1 ) to  15 ( b   3 ), a cutaway portion or a hole is formed in the vicinity of each of the two side portions, which does not influence display by the display board. In other words, the cutaway portion or the hole is formed by punching a relatively thin flat plate using a punching die, which enables inexpensive manufacture of the display board. 
     Alternatively, the projection of the first fitting portion may be arranged in or in the vicinity of a middle position between the insertion ports arranged at both ends of the insertion space, the support body being formed by a plurality of support body forming members, two of the support body forming members each having a matching surface, the matching surfaces of the support body forming members being matched together, one of the two support body forming members having one of the insertion ports formed at both ends of the insertion space and a part of the projection of the first fitting portion, the other one of the two support body forming members having the other one of the insertion ports formed at both ends of the insertion space and the remaining part of the projection of the first fitting portion, the mounting portion being formed by matching the two support body forming members with each other at the matching surfaces, the cutaway portion or the hole or the recess of the second fitting portion of the display board being one of cutaway portions or holes or recesses arranged in or in the vicinity of a middle position between the leading portion and the trailing portion and in or in the vicinities of the side portions on both sides, the two support body forming members being joined together through the display board when the display board is inserted into and mounted in the mounting portion formed by the support body forming members and the projection of the first fitting portion becomes fitted to the cutaway portion or the hole or the recess of the second fitting portion. 
     In this configuration, the support body forming members forming the support body of the present invention are shaped as illustrated in  FIGS. 10 to 12 , for example. Specifically, the mounting portion is formed by matching the matching surfaces of the two support body forming members together. Then, the display board illustrated in  FIG. 3  is mounted in the mounting portion, thus joining the support body forming members to each other. 
     Specifically, when the display board is mounted in the mounting portion formed by matching the two support body forming members with each other, the projection of the first fitting portion becomes fitted to the cutaway portion, the hole, or the recess of the second fitting portion of the display board due to the shape restoration property of the display board. 
     As a result, the projection of the first fitting portion, which is formed by the respective corresponding portions of the two support body forming members, is clamped by the display board from both sides. This holds the support body forming members in a state joined together through the display board. 
     The two support body forming members that are joined together through the display board are separated from each other by removing the display board from the mounting portion while deforming the display board. 
     Regarding joint of the support body forming members, as long as the projection of the first fitting portion can be held in a state clamped by the display board from the both sides, the projection of the first fitting portion may be located at any suitable position other than the middle position between the insertion ports arranged on both ends of the slide grooves. 
     This is because the projection of the first fitting portion can be held in the state clamped by the display board from the both sides unless the projection of the first fitting portion is adjacent to any insertion port. 
     Alternatively, the projection of the first fitting portion may be the same part as the bulging portion. 
     In this configuration, the support body of the present invention is shaped as illustrated in  FIGS. 8 and 9(   a ) to  9 ( d ), for example. The display board is shaped as illustrated in  FIGS. 9(   e ) to  9 ( k ). 
     The opposing wall or the window side wall, which faces the window side wall or the opposing wall including the bulging portion, is inclined in correspondence with the rise of the bulging portion in such a manner that the display board is deformed in a convex shape along the rise of the bulging portion when inserted into the mounting portion. This allows the portion of the display board between the side portions on both sides, as a whole, to bend along the bulging portion. 
     Alternatively, the projection of the first fitting portion may be arranged in or in the vicinity of the middle position between the insertion ports located at both ends of the insertion space, the support body being formed by a plurality of support body forming members, two of the support body forming members each having a matching surface, the matching surfaces of the support body forming members being matched with each other, one of the two support body forming members including one of the insertion ports arranged at both ends of the insertion space and a part of the projection of the first fitting portion, the other one of the two support body forming members including the other one of the insertion ports arranged at both ends of the insertion space and the remaining part of the projection of the first fitting portion, the mounting portion being formed by matching the two support body forming members with each other at the matching surfaces, the hole or the recess of the second fitting portion of the display board being located at a position in or in the vicinity of the middle position between the leading portion and the trailing portion and in or in the vicinity of the middle position between the side portions on both sides, the two support body forming members being joined together through the display board when the display board is inserted into and mounted in the mounting portion formed by the support body forming members and the projection of the first fitting portion becomes fitted to the hole or the recess of the second fitting portion. 
     In this configuration, even if, for example, the support body illustrated in  FIGS. 8 and 9(   a ) to  9 ( d ) is divided into the two support body forming members illustrated in  FIG. 10 , the support body forming members are joined together by forming the mounting portion by matching the matching surfaces of the support body forming members with each other and then mounting the display board illustrated in  FIGS. 9(   e ) to  9 ( k ) in the mounting portion. 
     This is because the projection of the first fitting portion formed by the respective corresponding portions of the two support body forming members is fitted in the hole or the recess of the display board, which is the second fitting portion. 
     Further, by removing the display board from the mounting portion, the two support body forming members are separated from each other. 
     Alternatively, at least one of the matching surfaces of the two support body forming members may include a recessed portion. 
     In this configuration, the support body forming member of the present invention is shaped as illustrated in  FIGS. 10(   a   1 ) to  10 ( a   4 ), for example. Using the recessed portion as an accommodation space, an object such as a card or a coin is received in the recessed portion. Then, the mounting portion is formed by matching the matching surface of the support body forming member with a matching surface of an additional support body forming member and the display board is mounted in the mounting portion. This joins the support body forming members together, with the object accommodated in the recessed portion. 
     In this manner, the display structure of the present invention can be embodied as a pendant or a broach having an accommodation space. 
     Assume that the additional support body forming member has a circular, heart-shaped, or star-shaped through hole extending from the matching surface to the outer surface of the support body forming member. In this case, an object such as a plate-like carved ornament or a photograph, which has such a size that the object does not separate from the through hole, is received in a recessed portion formed in the matching surface of the support body forming member. The support body forming members are then joined together through the display board. As a result, the object received in the recessed portion is visible through the through hole. 
     In this manner, the support body forming member and the support body shaped as illustrated in  FIG. 12 , for example, may be formed. As a result, other than a pendant or a broach, the display structure of the present invention is embodied as a name tag by accommodating a plate with a name on it in the recessed portion. 
     In other words, the display structure of the present invention is employed as a name tag by mounting the display boards with each displaying a character in the corresponding mounting portions of the support body. Further, by accommodating the plate with the name on it in the recessed portion, the display structure is used as a fashionable name tag. 
     Alternatively, the support body forming member having the recessed portion may further include a through hole, and the through hole may be arranged at a position through which the recessed portion and the outer surface are connected to each other. 
     In this configuration, the object received in the recessed portion is visible. For example, a circular, heart-shaped, or star-shaped through hole may be formed in the recessed portion of the support body forming member illustrated in  FIGS. 10(   a   1 ) to  10 ( a   4 ). Then, an object such as a photograph having such a size that the object cannot be removed through the through hole is accommodated in the recessed portion. Subsequently, by matching the matching surface of the support body forming member with a matching surface of an additional support body forming member, the mounting portion is formed. The display board is then installed in the mounting portion to join the support body forming members to each other. 
     As a result, even if the additional support body forming member does not have a through hole or a transparent portion, the object received in the recessed portion is visible through the through hole of the support body forming member having the recessed portion. 
     The object received in the recessed portion is visible also when a transparent member is employed instead of the through hole. Alternatively, the object in the recessed portion is visible when a transparent member is fitted in the through hole. 
     Alternatively, the display structure of the present invention may include a hinge for joining the two support body forming members to each other. 
     In this configuration, when the display board is removed from the mounting portion formed by the two support body forming members, the support body forming members may be separated from each other by separating the matching surfaces from each other with respect to the hinge. Further, in this state, the support body forming members may be joined together by matching the matching surfaces with respect to the hinge. 
     Alternatively, the matching surface of each of the two support body forming members may include a through hole extending to the outer surface of the support body forming member. 
     In this configuration, the display structure may be employed as a ring or a bracelet if the size of the display structure is adjusted. 
     For example, using two support body forming members illustrated in  FIGS. 10(   b   1 ) to  10 ( b   4 ), the mounting portion is formed by matching the matching surfaces of the support body forming members with each other. The display board is then mounted in the mounting portion. In this manner, a display structure having a through hole formed in a central portion of the display structure is assembled. The display structure is used as a ring or a bracelet. 
     Alternatively, the mounting portion of the display structure of the present invention may have the insertion port formed on a side corresponding to the trailing portion of the display board and a press-out hole or a press-out groove on a side corresponding to the leading portion of the display board when the display board is mounted in the mounting portion, the press-out hole being a hole used for pressing out the display board when removing the display board mounted in the mounting portion through the insertion port, the press-out groove being a groove used for pressing out the display board when removing the display board mounted in the mounting portion through the insertion port. 
     In this configuration, after the display board is mounted in the support body illustrated in  FIG. 7 , for example, and the display structure is completed, the display board may be removed from the support body using a bar-like object such as a pin. 
     Further, the support body having the insertion port at one end of the insertion space and the press-out hole or the press-out groove at the other end of the insertion space may have other characteristics like those described above. For example, like the support body illustrated in  FIGS. 8 and 9(   a ) to  9 ( d ), the projection of the first fitting projection may be with the same part as the bulging portion. Alternatively, like the support body illustrated in  FIGS. 10 to 12 , the support body may be formed by a plurality of support body forming members. Further, at least one of the support body forming members forming the support body may have a recessed portion or a through hole. 
     In other words, any suitable combination of these characteristics may be employed as needed. 
     As the support body of the present invention, the above described support body, which forms (is a component of) the above-described display structure of the present invention, may be employed. 
     As the support body forming member of the present invention, the above-described support body forming member, which forms (is a component of) the above-described support body of the present invention, may be employed. 
     As has been described, in the display structure formed by the display board and the support body of the present invention, the display board is mounted in the support body simply by pressing the display board into the support body, without directly deforming the display board, when the display board is inserted into the support body. 
     By forming the press-out hole or the press-out groove at the end opposite to the end corresponding to the insertion port of the insertion space, the display board is selectively inserted and removed through the insertion port. 
     If the insertion ports are arranged on both sides of the insertion space, the display board is inserted from either one of the insertion ports. Also, simply by pressing the display board from the insertion port on one side, the display board is detached through the insertion port at the opposite side. 
     In the display structure of the present invention, the display board is attachable/detachable with respect to the support body without causing local intense deformation in the display board. As a result, a material having insufficient shape restoration property can be employed for the display board of the display structure. 
     Also, according to the present invention, even if a display board is small in size and cannot have a finger holding portion, the display board is sufficiently fitted to the support body when mounted in the support body. This facilitates attachment/detachment of the display board with respect to the support body. Accordingly, the display structure having the attachable/detachable display board is reduced in size. 
     As a result, the display structure of the present invention may be used as a pendant, a broach, an accessory such as an earring, a dial member of a dial lock, a key ring, a name tag attached to a cloth, or the like. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  includes diagrams showing a display structure according to one embodiment of the present invention as viewed from various directions, including perspective views showing a support body; 
         FIG. 2  includes a side view, a front view, and a cross-sectional view showing the support body illustrated in  FIG. 1 ; 
         FIG. 3  includes diagrams showing a display board corresponding to the support body illustrated in  FIG. 1 , as viewed from various directions; 
         FIG. 4  includes diagrams illustrating steps for mounting the display board in the support body illustrated in  FIG. 1 ; 
         FIG. 5  includes cross-sectional views illustrating steps for mounting the display board in the support body illustrated in  FIG. 1 ; 
         FIG. 6  included diagrams showing a support body having holes serving as display window portions as viewed from various directions, including cross-sectional views showing the support body; 
         FIG. 7  includes diagrams showing a support body having a press-out hole as viewed from various directions, including cross-sectional views showing the support body, and a left side view and a perspective view showing a support body having a press-out groove; 
         FIG. 8  includes diagrams showing a support body having projections in opposing walls as viewed from various directions, including cross-sectional views showing the support body; 
         FIG. 9  includes perspective cross-sectional views and perspective views showing the support body illustrated in FIG.  8 , and diagrams showing two types of display boards corresponding to the support body; 
         FIG. 10  includes diagrams showing an example of a support body formed by two support body forming members; 
         FIG. 11  includes diagrams showing an example of a support body formed by three support body forming members; 
         FIG. 12  includes diagrams showing other examples of support bodies each formed by two support body forming members; 
         FIG. 13  includes diagrams showing an example of a spherical support body; 
         FIG. 14  includes diagrams showing an example of a cross-shaped support body; 
         FIG. 15  includes diagrams showing a support body having a transparent display window portion and bulging portions formed on window side walls, a support body having projections, and a display board corresponding to the support body; 
         FIG. 16  includes diagrams showing a dial lock including display structures according to the present invention as dial members and the display structures; 
         FIG. 17  includes diagrams showing various applications of the display structure according to the invention; and 
         FIG. 18  includes diagrams schematically showing the configuration of a telephone set as an example of a conventional display structure. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     One embodiment of the present invention will now be described with reference to the attached drawings. 
       FIG. 1  includes diagrams showing a display structure  10  as viewed from various directions, including diagrams showing a support body  100 , which is one of the components of the display structure  10 , as viewed from above and the front right. 
       FIGS. 1(   a ) to  1 ( f ) are a top view, a left side view, a front view, a right side view, a bottom view, and a perspective view from above and the front right, respectively, showing the display structure  10 .  FIG. 1(   g ) is a perspective view showing the support body  100  as viewed from above and the front right. 
     As shown in  FIGS. 1(   a ) to  1 ( f ), the display structure  10  has the support body  100 , which is a main component of the display structure  10 , and a plurality of display boards  300 . 
     In the example shown in  FIGS. 1(   a ) to  1 ( f ), six display boards  300  each serving as a component of the display structure  10  are employed. Each of the display boards  300  has a display surface that displays a number. The display surfaces may display other objects than numbers, such as characters, codes, marks, images, colors, or patterns. The same applies to the display boards discussed below. 
     When the six display boards  300  are all removed from the display structure  10  in the state illustrated in  FIG. 1(   f ), the support body  100  is in the state illustrated in  FIG. 1(   g ). 
       FIGS. 2(   a ) to  2 ( c ) are a left side view, a front view, and a right side view, respectively, showing the support body  100 .  FIG. 2(   d ) is a diagram showing the A-A cross section of the support body  100  as viewed from the side corresponding to the left surface of the support body  100 .  FIG. 2(   e ) is a diagram showing the B-B cross section of the support body  100  as viewed from the side corresponding to the front surface of the support body  100 . 
     The shaded area indicated by the reference numeral  106 A corresponds to the A-A cross section and the shaded area indicated by the reference numeral  106 B corresponds to the B-B cross section. 
     As illustrated in  FIG. 1(   g ) and  FIGS. 2(   a ) to  2 ( e ), the support body  100  has a left outer surface  101 , a right outer surface  102 , a circular recessed portion  103 , a main outer surface  104 , and mounting portions  105 . 
     Each of the mounting portions  105  includes window side walls  105   a , an opposing wall  105   b , groove bottom walls  105   c , insertion ports  105   d , a display window portion  105   e , projections  105   f , an insertion space  105   j , and slide grooves  105   k . The opposing wall  105   b  has a bulging portion  105   g  and recessed portions  105   h.    
     Each opposing wall  105   b  faces the corresponding window side walls  105   a . The space between the window side walls  105   a  and the opposing wall  105   b  is the insertion space  105   j . Side grooves formed on both sides of the insertion space  105   j  are the slide grooves  105   k.    
     The slide grooves  105   k  are grooves along which the display board  300  is guided when the display board  300  is inserted into the insertion space  105   j . Each of the insertion ports  105   d  has such a size that the display board  300  can be inserted into the insertion space  105   j.    
     With reference to  FIGS. 1(   g ) and  2 , the support body  100  as a whole has a thin columnar shape and is shaped to have the circular recessed portion  103 , which is recessed in the axial direction of the support body  100 , and the six mounting portions  105  aligned in a circumferential direction of the support body  100 . 
     The left outer surface  101  and the right outer surface  102  of the support body  100  are parallel to each other. The main outer surface  104  extends perpendicularly to both of the left outer surface  101  and the right outer surface  102 . The insertion space  105   j  extends perpendicularly to both of the left outer surface  101  and the right outer surface  102 . 
     The main outer surface  104  refers specifically to an outer surface including the display window portions  105   e , particularly, among the outer surfaces of the support body  100 . However, if the outer surfaces of the support body are round surfaces, which are, for example, outer surfaces of a spherical body, there is no clear boundary between a main outer surface and other outer surfaces and the main outer surface and the other outer surfaces may not extend perpendicularly to one other. Alternatively, there may be cases in which a left outer surface and a right outer surface of a support body are not parallel to each other. 
     Each insertion space  105   j  is a space for accommodating the corresponding display board  300  and arranged at a position continuous from the associated insertion ports  105   d . The insertion space  105   j  is the space between the window side walls  105   a  and the corresponding opposing wall  105   b  of the mounting portion  105 . 
     In  FIG. 2(   a ), the dotted area indicates one of the insertion spaces  105   j . Although corresponding reference numerals are omitted from  FIG. 2(   a ), each insertion space  105   j  has an insertion port  105   d  arranged closer to the sheet surface of  FIG. 2(   a ) and an insertion port  105   d  arranged as spaced from the sheet surface of the drawing. 
     With reference to  FIG. 2(   a ), each mounting portion  105  has the groove bottom walls  105   c  arranged on both sides of the insertion space  105   j . Each of the groove bottom walls  105   c  is a wall by which the corresponding one of the window side walls  105   a  is connected to the opposing wall  105   b . The groove bottom walls  105   c  are the bottoms of the slide grooves  105   k.    
     However, the groove bottom walls  105   c  do not necessarily have to be employed. The window side walls  105   a  and the corresponding opposing wall  105   b  may be connected together at an acute angle or joined together directly through a curved surface. In other words, the bottom of each slide groove  105   k  does not necessarily have to be flat. The same applies to the other support bodies described below. Among the walls forming each insertion space  105   j , the walls corresponding to the display window portion  105   e  are the window side walls  105   a  and the wall facing the window side walls  105   a  is the opposing wall  105   b.    
     The insertion ports  105   d  are inlet ports through which the display board  300  is inserted into the insertion space  105   j . With reference to  FIGS. 1 and 2 , the insertion ports  105   d  are arranged at both ends of each insertion space  105   j . Each of the insertion ports  105   d  has an opening formed at a position different from the display window portion  105   e  and in the corresponding one of the left outer surface  101  and the right outer surface  102  of the support body  100 . 
     This configuration allows insertion of the display board  300  into the insertion space  105   j  from both of the side corresponding to the left outer surface  101  of the support body  100  and the side corresponding to the right outer surface  102  of the support body  100 . After the display board  300  is installed, the display board  300  is detachable from each of the sides corresponding to the left outer surface  101  and the side corresponding to the right outer surface  102 . 
     The display window portion  105   e  is a window through which the display surface of the display board  300  mounted in the mounting portion  105  is viewed from outside the main outer surface  104 . With reference to  FIGS. 1(   g ),  2 ( a ),  2 ( c ), and  2 ( d ), each of the display window portions  105   e  of the support body  100  is a cutaway portion extending from the insertion space  105   j  to the main outer surface  104 , which is a cutaway portion extending from the window side walls  105   a  to the main outer surface  104 . 
     The slide grooves  105   k  are side grooves arranged on both sides of each insertion space  105   j . The slide grooves  105   k  are the grooves by which the display board  300  is guided when the display board  300  is inserted into the insertion space  105   j . In other words, the space between the slide grooves  105   k  on both sides of each mounting portion  105  is the insertion space  105   j . The display board  300  is mounted in the mounting portion  105  through the corresponding one of the insertion ports  105   d  in a sliding manner while being guided along the slide grooves  105   k  on both sides. 
     The projections  105   f  are arranged at mutually opposing positions on the bottoms of the slide grooves  105   k  on both sides of each insertion space  105   j  and on the side corresponding to the window side walls  105   a.    
     Specifically, one of the projections  105   f  is located on the bottom of the corresponding one of the slide grooves  105   k  arranged on both sides of each insertion space  105   j  and on the side corresponding to the corresponding one of the window side walls  105   a . The other one of the projections  105   f  is arranged on the bottom of the other one of the slide grooves  105   k  and on the side corresponding to the other one of the window side walls  105   a . These projections  105   f  oppose each other. 
     Each of the projections  105   f  is a projection of a first fitting portion that becomes fitted to the display board  300  when the display board  300  is mounted in the insertion space  105   j . Such fitting is enabled by arranging each projection  105   f  at a position over which at least a part of the display board  300  passes when the display board  300  is inserted into the insertion space  105   j.    
       FIG. 2(   d ) is a diagram showing the A-A cross section  106 A of the support body  100 . The A-A cross section  106 A is the cross section taken at the position corresponding to a half of the thickness of the support body  100 . The thickness of the support body  100  herein refers to the distance between the left outer surface  101  and the right outer surface  102 . 
     As illustrated in  FIG. 2(   d ), the A-A cross section  106 A, which is indicated by the shaded area, includes a cross section of each projection  105   f . Specifically, the projection  105   f  is located in a middle position between the insertion ports  105   d , which correspond to both ends of each slide groove  105   k , and at the position corresponding to the half of the thickness of the support body  100 . 
     With reference to  FIG. 2 , each mounting portion  105  of the support body  100  has a bilaterally symmetrical shape, which is mirror-image in shape with respect to the A-A cross section  106 A. 
     In other words, the recessed portions  105   h  of each opposing wall  105   b  are portions that are recessed with respect to the bulging portion  105   g.    
       FIGS. 3(   a ) to  3 ( f ) are diagrams showing the display board  300 , which is a component of the display structure  10 . FIGS.  3 ( a ) to  3 ( f ) are a top view, a left side view, a front view, a right side view, a bottom view, and a perspective view from above and the front right, respectively. 
       FIG. 3(   a ) includes top views showing a plurality of display boards  300 , which display different objects. Specifically, the display boards  300  have display surfaces  301  displaying different objects such as “0”, “1”, “2”, “3”, “4”, “5”, “6”, “7”, “8”, or “9”. 
     Each of the display boards  300  illustrated in  FIG. 3(   a ) has the display surface  301 , side portions  305 , and cutaway portions  306 . 
       FIG. 3(   e ) is a bottom view showing each display board  300 . A back surface  302  is the backside of each display surface  301 . 
     The display boards  300  illustrated in  FIGS. 3(   a ) to  3 ( f ) are formed of a material having deformation and shape restoration properties such as metal or plastic. The other display boards that will be described later are also assumed to be formed of metal or plastic and have the deformation and shape restoration properties. 
       FIG. 4  includes diagrams in accordance with which mounting steps of each display board  300  with respect to the support body  100  will be described herein using the display board  300  displaying “0” on its top surface, by way of example. 
     Also, with reference to  FIG. 4 , shapes of the display board  300  changed by the deformation and shape restoration properties of the display board  300  in the steps of mounting the display board  300  in the support body  100  will hereafter be described. 
       FIG. 4(   a   1 ) is a perspective view illustrating a state before the display board  300  is inserted into the corresponding mounting portion  105  of the support body  100 , as viewed from above and the front right. 
       FIG. 4(   a   2 ) is a diagram illustrating a state before the display board  300  is inserted into the mounting portion  105  of the support body  100 , as viewed from the front. 
       FIGS. 4(   a   1 ) and  4 ( a   2 ) are diagrams illustrating the same state as viewed from different directions. 
     The display board  300  illustrated in  FIGS. 4(   a   1 ) and  4 ( a   2 ) includes the display surface  301  displaying “0”, a leading portion  303 , a trailing portion  304 , the side portions  305 , and the cutaway portions  306 . When the display board  300  is inserted into the mounting portion  105  of the support body  100 , the leading portion  303  is located forward, the trailing portion  304  is located on a trailing side, and the side portions  305  are located at lateral sides. The cutaway portions  306  each form a second fitting portion with which the corresponding first fitting portion, which is formed by the projection  105   f , becomes engaged when the display board  300  is mounted in the mounting portion  105 . 
       FIG. 4(   b   1 ) illustrates a state in which the display board  300  is inserted into the mounting portion  105  by approximately a quarter of the distance between the leading portion  303  and the trailing portion  304 . In this state, the leading portion  303  is not in contact with the projections  105   f . Accordingly, the display board  300  does not need to deform. 
       FIG. 4(   b   2 ) shows a state in which the display board  300  is inserted into the mounting portion  105  by approximately a half of the distance between the leading portion  303  and the trailing portion  304 . 
     When the display board  300  is pressed continuously from the state illustrated in  FIG. 4(   b   1 ), the portions of the display board  300  extending from the leading portion  303  to the corresponding side portions  305  on both sides are brought into contact with the projections  105   f . After this stage, a part of the display board  300  in the vicinity of the center of the area between the side portions  305  on both sides is stopped by the bulging portion  105   g  from being displaced toward the circular recessed portion  103 . Simultaneously, portions of the display board  300  in the peripheries of the side portions  305  is displaced toward the circular recessed portion  103  using the spaces of the recessed portions  105   h  and avoid the projections  105   f.    
     As a result, with reference to  FIG. 4(   b   2 ), the display board  300  is deformed in such a manner that the display surface  301  forms a convex surface extending from one of the side portions  305  to the other one of the side portions  305 . 
       FIG. 4(   b   3 ) shows a state in which the display board  300  is completely mounted in the mounting portion  105  after having been pressed continuously from the state illustrated in  FIG. 4(   b   2 ). 
     With reference to  FIG. 4(   b   3 ), after the cutaway portions  306  of the display board  300  reach such positions that the cutaway portions  306  are fitted to the projections  105   f  of the mounting portion  105 , the side portions  305  move separately from the recessed portions  105   h  and the circular recessed portion  103  due to the shape restoration property of the display board  300 . In this manner, the cutaway portions  306  are fitted to the projections  105   f . In other words, the second fitting portions of the display boards  300  are fitted to the first fitting portions of the support body  100 . 
       FIG. 4(   c   1 ) is a diagram showing the same state as the state illustrated in  FIG. 4(   b   1 ), as viewed from the front. 
       FIG. 4(   c   2 ) is a diagram showing the same state as the state illustrated in  FIG. 4(   b   2 ), as viewed from the front. 
       FIG. 4(   c   3 ) is a diagram showing the same state as the state illustrated in  FIG. 4(   b   3 ), as viewed from the front. 
       FIG. 4(   d   1 ) is a diagram showing the C-C cross section in the state illustrated in  FIG. 4(   c   1 ), as viewed from the right. 
       FIG. 4(   d   2 ) is a diagram showing the D-D cross section in the state illustrated in  FIG. 4(   c   2 ), as viewed from the right. 
       FIG. 4(   d   3 ) is a diagram showing the E-E cross section in the state illustrated in  FIG. 4(   c   3 ), as viewed from the right. 
     Next, a procedure for mounting the display board  300  in the mounting portion  105  of the support body  100  will be specifically described. 
     To begin the procedure, in a first step, the display board  300  is arranged on the side corresponding to the display window portion  105   e  with the display surface  301  facing in the opposite direction from the opposing wall  105   b  of the mounting portion  105 . Then, the leading portion  303  of the display board  300  is arranged at the position corresponding to the insertion port  105   d  of the mounting portion  105 . 
     Subsequently, in a second step, the display board  300  is moved forward until the portions of the display board  300  extending from the leading portion  303  to the corresponding side portions  305  contact the projections  105   f.    
     In a third step, the display board  300  is continuously moved forward with such force that portions of the leading portion  303  in the proximities of the groove bottom walls  105   c  and the side portions  305  proceed beyond the slanted surfaces of the corresponding projections  105   f.    
     Finally, in a fourth step, the display board  300  is inserted continuously until the cutaway portions  306  reach the positions corresponding to the projections  105   f.    
     Mounting of the display board  300  in the mounting portion  105  is completed by the above-described procedure. 
     If the projections  105   f  do not have the slanted surfaces, a slanted surface may be formed in each of the portions of the display board  300  extending from the leading portion  303  to the corresponding side portions  305 . This makes it possible to mount the display board  300  in the mounting portion  105  of the support body  100  by a procedure similar to the above-described procedure. In this case, the third step is modified to a step in which “the display board  300  is inserted continuously with such force that the slanted surfaces extending from the leading portion  303  to the corresponding side portions  305  proceed beyond the projections  105   f”.    
     After the display board  300  is inserted in the mounting portion  105  and held in the state illustrated in  FIGS. 4(   b   3 ),  4 ( c   3 ), and  4 ( d   3 ), the display board  300  can be removed from the mounting portion  105  by the procedure described below. 
     In a first step, the display board  300  is pressed from one of the insertion ports  105   d , each of which has an opening in the corresponding one of the left outer surface  101  and the right outer surface  102  of the support body  100 , toward the other one of the insertion ports  105   d  in such a manner that the cutaway portions  306  proceed beyond the slanted surfaces of the projections  105   f.    
     Next, in a second step, the display board  300  is pressed further outward or, alternatively, the portion of the display board  300  exposed from the insertion port  105   d  is pulled outward so that the display board  300  becomes completely separate from the mounting portion  105 . 
     The display board  300  can be removed from the support body  100  by the above-described procedure. 
     Specifically, with reference to  FIGS. 1(   g ) and  2 , in each projection  105   f  of the support body  100 , the portion from the base of the projection  105   f  on the side corresponding to the associated window side wall  105   a  to the top of the projection  105   f  is inclined at a moderate inclination angle. As a result, even when the projections  105   f  are fitted to the cutaway portions  306  as illustrated in  FIG. 4(   d   3 ), the support body  100  and the display board  300  can be disengaged from each other by pressing the display board  300  from one of the insertion ports  105   d  toward the other one of the insertion ports  105   d.    
     This is because the portions of the display board  300  extending from the peripheries of the cutaway portions  306  to the corresponding side portions  305  are guided along the inclination of the corresponding projections  105   f  and are displaced toward the recessed portions  105   h  and the circular recessed portion  103 . 
     With reference to  FIGS. 3(   a ) to  3 ( f ), the display board  300  is shaped symmetrically in a lateral direction and a front-and-rear direction, except for the object displayed on the display surface  301 . As a result, the display board  300  can be mounted even if the position of the trailing portion  304  and the position of the leading portion  303  are switched. In other words, the display board  300  can be inserted into the mounting portion  105  from each of the sides corresponding to the left outer surface illustrated in  FIG. 3(   b ) and the side corresponding to the right outer surface illustrated in  FIG. 3(   d ). 
     Further, the display board  300  is shaped symmetrically between the front surface and the back surface, as illustrated in  FIGS. 3(   a ) to  3 ( f ), except for the object displayed on the display surface  301 . As a result, the display board  300  can be mounted even if the position of the display surface  301  and the position of the back surface  302  are switched. Specifically, by forming an indicator such as a number, a character, a code, an image, a color, or a pattern on the back surface  302 , the back surface  302  can be employed as a display surface. 
       FIGS. 5(   a ) to  5 ( c ) are perspective views showing the C-C cross section in the state illustrated in  FIG. 4(   c   1 ), the D-D cross section in the state illustrated in  FIG. 4(   c   2 ), and the E-E cross section in the state illustrated in  FIG. 4(   c   3 ), respectively, as viewed from above and the front right. 
     For example, the support body  100  is prepared using polyoxymethylene. The left outer surface  101  and the right outer surface  102  are formed each with a maximum diameter of 24 mm and the thickness between the left outer surface  101  and the right outer surface  102  is set to 6 mm. Further, the display board  300  is prepared using hard vinyl chloride. The distance from the leading portion  303  to the trailing portion  304  is set to 6 mm and the interval between the side portions  305  on both sides is set to 7 mm. The thickness between the display surface  301  and the back surface  302  is set to 0.5 mm. In this case, attachment/detachment of the display board  300  with respect to the support body  100  illustrated in  FIG. 4  can be carried out easily and repeatedly. 
       FIGS. 6(   a ) to  6 ( g ) are diagrams showing a support body  110 , which is a support body having display window portions  115   e  that are holes, as modified from the display window portions  105   e  that are the cutaway portions in the support body  100 . 
     Each display window portion  105   e  is a cutaway portion extending from the main outer surface  104  to the window side walls  105   a  and from the left outer surface  101  to the right outer surface  102 . In contrast, each display window portion  115   e  is a hole extending from the main outer surface  104  to the window side walls  105   a.    
       FIGS. 6(   a ) to  6 ( g ) are a left side view showing the support body  110 , a perspective view showing the support body  110  as viewed from above and the front right, a diagram showing the B-B cross section as viewed from the front, a diagram showing the A-A cross section as viewed from the side corresponding to the right surface, a diagram showing the B-B cross section as viewed from above and the front right, a diagram showing the A-A cross section as viewed from above and the front right, and a diagram showing the support body  110  as viewed from slightly below and the right, respectively. 
     The position of the A-A cross section and the position of the B-B cross section correspond to the position illustrated in  FIG. 2(   b ) and the position illustrated in  FIG. 2(   c ), respectively. 
     The shaded area indicated by the reference numeral  116 A in  FIGS. 6(   d ) and  6 ( f ) indicates the A-A cross section of the support body  110 . The shaded area indicated by the reference numeral  116 B in  FIGS. 6(   c ) and  6 ( e ) indicates the B-B cross section of the support body  110 . 
     As in the case of the display window portions  105   e , each of which is shaped bilaterally symmetric and forms the mirror-image shape along the A-A cross section, each of the display window portions  115   e  is shaped bilaterally symmetric and forms a mirror-image shape along the A-A cross section. 
       FIGS. 7(   a ) to  7 ( f ) are diagrams showing a support body  120 . Specifically, each display window portion  105   e  of the support body  100  that is a cutaway portion is modified to a display window portion  115   e  that is a hole in the support body  120 . Also, each insertion port  105   d  of the support body  100  located on the side corresponding to the left surface of the support body  100 , which allows both insertion and removal of a display board, is modified to a press-out hole  127  permitting only detachment of the display board in the support body  120 . 
       FIGS. 7(   a ) to  7 ( f ) are a left side view showing the support body  120 , a front view showing the support body  120 , a right side view showing the support body  120 , a diagram showing the support body  120  as viewed from above and the front right, a diagram showing the B-B cross section as viewed from the front, and a diagram showing the B-B cross section as viewed from above and the front right, respectively. The position of the B-B cross section corresponds to the position illustrated in  FIG. 2(   c ). 
     The shaded area indicated by the reference numeral  126 B in  FIGS. 7(   e ) and  7 ( f ) indicates the B-B cross section of the support body  120 . 
       FIGS. 7(   g ) and  7 ( h ) are diagrams showing a support body  130  having press-out grooves  138  permitting only removal of a display board, which are modified from the press-out holes  127  on the side corresponding to the left surface of the support body  120 . 
     The support body  120  and the support body  130  illustrated in  FIG. 7  are shaped similarly to the support body  110 . However, the support bodies  120 ,  130  are different from the support body  110  in that each of the support bodies  120 ,  130  does not have the insertion port  105   d  on the side corresponding to the left surface of the support body  120 ,  130  and that the support bodies  120 ,  130  each have the press-out holes  127  or the press-out grooves  138  on the side corresponding to the left surface. 
     In the support body  120  and the support body  130 , the insertion ports are arranged only on one side of the corresponding insertion spaces. In these cases, even if a display board is pressed forward with excessive force, the display board is prevented from being inadvertently pressed out of an insertion port arranged at the opposite side. 
     To remove a display board from an insertion space of the support body  120 , the display board is pressed out of the space from the press-out hole  127  toward the insertion port  105   d  using a bar-like object such as a pin. 
     To remove a display board from an insertion space of the support body  130 , a bar-like or plate-like object may be employed. 
     Alternatively, in each of the support body  100  and the support body  110 , a plurality of projections may be aligned from one insertion port toward the other insertion port. 
     Further, in each of the support body  120  and the support body  130 , a plurality of projections may be arranged from the insertion port toward the wall including the press-out hole or the press-out groove. 
     This is because the multiple projections can be engaged altogether with a single cutaway portion or hole or recessed portion of the display board if the cutaway portion or the hole or the recessed portion is enlarged. 
     Alternatively, a plurality of cutaway portions or holes or recessed portions may be formed in the display board and a plurality of projections may each be fitted to the corresponding one of the cutaway portions, the holes, or the recessed portions. 
       FIGS. 8 and 9  are diagrams showing a support body  140 , which is a different type from the support body  100 , including views showing a display board  310  and a display board  320  that may be mounted in the support body  140 . 
       FIGS. 8(   a ) to  8 ( d ) are a top view, a left side view, a front view, and a right side view showing the support body  140 , respectively.  FIG. 8(   e ) is a diagram showing the F-F cross section as viewed from the side corresponding to the right surface of the support body  140 . In the drawing, the shaded area indicated by the reference numeral  146 F indicates the F-F cross section.  FIG. 8(   f ) is a diagram showing the G-G cross section as viewed from the front. In the drawing, the shaded area indicated by the reference numeral  146 G indicates the G-G cross section. The F-F cross section  146 F is a cross section taken at the position corresponding to a half of the thickness of the support body  140 . 
       FIG. 9(   a ) is a diagram showing the F-F cross section  146 F as viewed from above and the front right.  FIG. 9(   b ) is a diagram showing the G-G cross section  146 G as viewed from above and the front right.  FIG. 9(   c ) is a perspective view showing the support body  140  as viewed from above and the front right.  FIG. 9(   d ) is a perspective view showing the support body  140  as viewed from above and the rear right. 
     As illustrated in  FIGS. 8 and 9(   a ) to  9 ( d ), the support body  140  has a left outer surface  141 , a right outer surface  142 , a circular recessed portion  143 , a main outer surface  144 , and mounting portions  145 . 
     Like the mounting portions  105  of the support body  100 , each of the mounting portions  145  of the support body  140  includes window side walls  145   a , an opposing wall  145   b , groove bottom walls  145   c , insertion ports  145   d , a display window portion  145   e , a projection  145   f , an insertion space, and slide grooves  145   k . The reference numeral for the insertion space is omitted from the drawings. 
     Each opposing wall  145   b  faces the corresponding window side walls  145   a . The clearance (the space) between the window side walls  145   a  and the opposing wall  145   b  is the insertion space. Side groove portions arranged on both sides of the insertion space are the slide grooves  145   k . The slide grooves  145   k  are the grooves along which a display board is guided when the display board is inserted into the insertion space. Each of the insertion ports  145   d  has such a size to permit insertion of the display board into the insertion space. 
     Each of the mounting portions  145  is shaped bilaterally symmetrical, that is, has a mirror-image shape with respect to the F-F cross section  146 F. 
     In the support body  140 , a bulging portion and a projection of a first fitting portion are formed by the same part. As a result, each projection  145   f  not only becomes fitted to a second fitting portion formed in the display board, but also functions in the same manner as the bulging portion of the support body. 
     As illustrated in  FIGS. 8 and 9(   a ) to  9 ( d ), the width of each slide groove  145   k  of the support body  140  becomes wider toward the display window portion  145   e . In other words, the opposing wall  145   b  is flat except for the projection  145   f , which is projected. However, each window side wall  145   a  inclines toward the display window portion  145   e  in a manner separating from the opposing wall  145   b  along a direction toward the display window portion  145   e.    
     In this manner, the projection  145   f  makes it easy for a central portion of a display board between side portions, which are arranged on both sides of the display board, to bend in a convex shape toward the display window portion  145   e.    
       FIGS. 9(   e ) to  9 ( h ) are diagrams showing the display board  310 , which may be mounted in the support body  140 .  FIGS. 9(   i ) to  9 ( k ) are diagrams showing a display board  320  shaped differently from the display board  310 , which may be mounted in the support body  140 . 
       FIGS. 9(   e ) to  9 ( h ) are a top view, a bottom view, an L-L cross sectional view, and an M-M cross sectional view, showing the display board  310 , respectively. 
     As illustrated in  FIGS. 9(   e ) to  9 ( h ), the display board  310  includes a display surface  311 , a back surface  312 , and a recessed portion  317 . Like the display board  300  illustrated in  FIGS. 4(   a   1 ) and  4 ( a   2 ), a part of the display board  310  located forward when the display board  310  is inserted into a mounting portion of the support body corresponds to a leading portion  313 . A part of the display board  310  located on a trailing side when the display board  310  is inserted corresponds to a trailing portion  314 . Portions of the display board  310  located on both sides when the display board  310  is inserted correspond to side portions  315 . 
     The right side of the display board  310  as viewed in  FIG. 9(   e ) is the leading portion  313 . However, since the display board  310  is shaped symmetrical in a lateral direction and a front-and-rear direction, the left side of the display board  310  as viewed in the drawing may be defined as the leading portion  313 . The display surface  311  is illustrated as displaying “0” by way of example. 
     The display board  310  has the recessed portion  317  formed in the back surface  312 . The recessed portion  317  forms a second fitting portion that is fitted to a first fitting portion formed by the projection  145   f . The recessed portion  317  is a recessed (dent-like) portion. 
     The term “dent” refers to an opening with a solid bottom and the term “hole” refers to a through hole. 
       FIGS. 9(   i ) to  9 ( k ) are a top view, a bottom view, and a front view, respectively, showing the display board  320 . 
     With reference to  FIGS. 9(   i ) to  9 ( k ), the display board  320  has a display surface  321 , a back surface  322 , and a recessed portion  327 . Like the display board  300  illustrated in  FIGS. 4(   a   1 ) and  4 ( a   2 ), a part of the display board  320  located forward when the display board  320  is inserted into a mounting portion of the support body corresponds to a leading portion  323 . A part of the display board  320  located on a trailing side when the display board  320  is inserted corresponds to a trailing portion. Portions of the display board  320  located on both sides when the display board  320  is inserted correspond to side portions. 
     The right side of the display board  320  as viewed in  FIG. 9(   i ) is the leading portion  323 . However, the display board  320  is shaped symmetrical in a lateral direction and a front-and-rear direction. Accordingly, the left side of the display board  320  as viewed in the drawing may be defined as the leading portion. The display surface  321  is illustrated as displaying “0” by way of example. 
     The display board  320  has the recessed portion  327  formed in the back surface  322 . The recessed portion  327  forms a second fitting portion that is fitted to the first fitting portion formed by the projection  145   f . The recessed portion  327  is a groove-like recessed portion. 
     In the above-described support body  100 , each projection  105   f  forming the first fitting portion is arranged on the bottom of the associated slide groove  105   k  on the side corresponding to the window side wall  105   a . However, in the support body  140 , each projection  145   f  is arranged in the vicinity of the center of the opposing wall  145   b.    
     In other words, the projection of each first fitting portion may be arranged on either the window side wall or the opposing wall. 
     In the case of the support body  100 , the portion of the display board extending from the portion of the leading portion in the vicinity of the groove bottom walls to the side portions deforms due to the deformation property of the display board. In this state, the display board proceeds beyond the projections each forming the first fitting portion and reaches the fitting position. At this stage, the second fitting portions of the display board and the first fitting portions of the support body become fitted to each other due to the shape restoration property of the display board. 
     Contrastingly, in the case of the support body  140 , mainly the portion of the display board, such as the display board  310  or the display board  320 , in the vicinity of the center of the leading portion deforms due to the deformation property of the display board. In this state, the display board moves beyond the projection  145   f  and the recessed portion of the display board reaches the fitting position. At this stage, the recessed portion of the second fitting portion and the projection  145   f  of the first fitting portion become fitted to each other due to the shape restoration property of the display board. 
     In accordance with  FIG. 10 , an example of a support body formed by two support body forming members will be described. 
       FIGS. 10(   a   1 ) to  10 ( a   4 ) are diagrams showing a support body forming member  200 A as viewed from various directions.  FIGS. 10(   b   1 ) to  10 ( b   4 ) are diagrams showing a support body forming member  200 B as viewed from different directions.  FIGS. 10(   c   1 ) to  10 ( c   4 ) are diagrams showing a support body  200 , which is formed by the support body forming member  200 A and the support body forming member  200 B, as viewed from various directions.  FIGS. 10(   d   1 ) and  10 ( d   2 ) are diagrams showing the H-H cross section of the support body  200  as viewed from different directions. 
       FIGS. 10(   a   1 ) to  10 ( a   4 ) are a left side view, a front view, a right side view, and a perspective view from above and the front right, respectively, showing the support body forming member  200 A. With reference to the drawings, the support body forming member  200 A includes a left outer surface  201 A, a circular recessed portion  203 A, a main outer surface  204 A, twelve projections  205   f A, and a matching surface  209 A. Reference numerals for insertion ports arranged on the side corresponding to the left outer surface  201 A are omitted from the drawings. 
       FIGS. 10(   b   1 ) to  10 ( b   4 ) are a left side view, a front view, a right side view, and a perspective view from above and the front right, respectively, showing the support body forming member  200 B. With reference to the drawings, the support body forming member  200 B includes a right outer surface  202 B, a circular hole  203 B, a main outer surface  204 B, twelve projections  205   f B, and a matching surface  209 B. Reference numerals for insertion ports arranged on the side corresponding to the right outer surface  202 B are omitted from the drawings. 
       FIGS. 10(   c   1 ) to  10 ( c   4 ) are a left side view, a front view, a right side view, and a perspective view from above and the front right, respectively, showing the support body  200 . As illustrated in the drawings, the support body  200  includes six mounting portions  105 . Each of the mounting portions  105  includes a display window portion  105   e , two projections  105   f , and a bulging portion  105   g . Reference numerals for a left outer surface, a right outer surface, a main outer surface, window side walls, an opposing wall, groove bottom walls, insertion ports, and slide grooves are omitted from the drawings. 
     The projections  105   f  of each mounting portion  105  are arranged at mutually opposing positions on the bottoms of the slide grooves, which are formed on both sides of the insertion space  105   j , on the sides corresponding to the window side walls. Each of the projections  105   f  is located at the middle position between the insertion ports arranged on both ends of the corresponding one of the slide grooves. 
       FIG. 10(   d   1 ) is a front view showing the H-H cross section of the support body  200 .  FIG. 10(   d   2 ) is a diagram showing the H-H cross section as viewed from above and the front right. The shaded area indicated by the reference numeral  206 A indicates the H-H cross section of the support body forming member  200 A. The shaded area indicated by the reference numeral  206 B indicates the H-H cross section of the support body forming member  200 B. 
     The support body forming member  200 A corresponds to a part of the support body  100  illustrated in  FIGS. 1 and 2  on the side corresponding to the left outer surface  101  obtained by increasing the diameter of the circular recessed portion  103  and cutting and dividing the support body  100  at the A-A position illustrated in  FIG. 2(   b ). 
     The support body forming member  200 B is shaped identically with a part of the support body  100  on the side corresponding to the right outer surface  102  obtained by cutting and dividing the support body  100  at the A-A position. The matching surface  209 B is shaped identically with the A-A cross section  106 A. 
     With reference to  FIGS. 10(   c   1 ) to  10 ( c   4 ),  10 ( d   1 ), and  10 ( d   2 ), the support body  200  is formed by the support body forming member  200 A and the support body forming member  200 B by matching the matching surface  209 A with the matching surface  209 B and then arranging the projections  205   f A in correspondence with the projections  205   f B to form the projections  105   f.    
     In other words, the matching surface  209 A and the matching surface  209 B are surfaces that are to be arranged to face each other and then matched together in order to form the support body  200 . 
     By mounting the display boards  300  illustrated in  FIG. 3  in the mounting portions  105  of the support body  200 , the support body forming member  200 A and the support body forming member  200 B are connected together. 
     This is because each of the projections  105   f  is fitted to the corresponding one of the cutaway portions  306  of each display board  300 , and each of the projections  205   f A and the corresponding one of the projections  205   f B are thus clamped together by the display board  300  from opposite sides. 
     By removing all the display boards  300  from the mounting portions  105  of all the support body  200 , the support body  200  is divided into the support body forming member  200 A and the support body forming member  200 B. 
     This is because each display board  300  is removed from the corresponding mounting portion  105  while being deformed in the above-described manner, and, when the all display boards  300  are detached from the mounting portions  105 , the projections  205   f A and the projections  205   f B are released from a state clamped from opposite sides. 
     As shown in  FIGS. 10(   d   1 ) and  10 ( d   2 ), the diameter of each circular recessed portion  203 A is greater than the diameter of each circular hole  203 B. As a result, by fitting an object such as a photograph or a decoration plate in the circular recessed portion  203 A and joining the support body forming member  200 A to the support body forming member  200 B using the display boards  300 , the object is held in place. 
     The components of the support body  200  illustrated in the drawings that are given the same reference numerals as the reference numerals of the corresponding components of the above-described support body  100  function in the same manner as the components of the support body  100 . This applies to the other drawings. 
       FIG. 11  includes diagrams showing an example of a support body formed by three support body forming members. 
       FIGS. 11(   a   1 ) to  11 ( a   4 ) are diagrams showing a support body forming member  200 Ba as viewed from various directions.  FIGS. 11(   b   1 ) to  11 ( b   4 ) are diagrams showing a support body forming member  200 Bb as viewed from various directions.  FIGS. 11(   c   1 ) to  11 ( c   4 ) are diagrams showing a support body  200  formed by the support body forming member  200 A, the support body forming member  200 Ba, and the support body forming member  200 Bb as viewed from various directions. 
     With reference to  FIG. 11 , the support body forming member  200 Ba and the support body forming member  200 Bb each have a shape obtained by dividing the support body forming member  200 B into two portions. 
     As has been described, a support body may be formed by three support body members or, alternatively, four or more support body forming members as long as each of the support body forming members includes insertion ports each formed at one of both ends of the corresponding slide groove and a part of each projection forming a first fitting portion at each surface to be matched with a corresponding surface. In this configuration, the support body forming members are joined together by mounting the display boards in the mounting portions of the support body formed by the support body forming members. The support body forming members may be disassembled from one another by removing the display boards from the mounting portions. 
     If one of the support body forming members that form the mounting portions has an insertion port and the other one of the support body forming members does not have an insertion port, only one joint of the support body forming members using the display boards is permitted. However, if the press-out holes or the press-out grooves illustrated in  FIG. 7  are formed in the support body forming member without an insertion port, the support body forming members become detachable from each other. 
       FIG. 12  includes diagrams showing examples of other support body forming members that may be combined with the support body forming member  200 A. 
       FIGS. 12(   a   1 ) to  12 ( a   4 ) are diagrams showing a support body forming member  210 B as viewed from various directions.  FIGS. 12(   b   1 ) to  12 ( b   4 ) are diagrams showing a support body  210  formed by the support body forming member  200 A and the support body forming member  210 B as viewed from various directions. 
       FIGS. 12(   c   1 ) to  12 ( c   4 ) are diagrams showing a support body forming member  220 B as viewed from various directions.  FIGS. 12(   d   1 ) to  12 ( d   4 ) are diagrams showing a support body  220  formed by the support body forming member  200 A and the support body forming member  220 B as viewed from various directions. 
       FIGS. 12(   a   1 ) to  12 ( a   4 ) are a left side view, a front view, a right side view, and a perspective view from above and the front right, respectively, showing the support body forming member  210 B. 
     As illustrated in the drawings, the support body forming member  210 B includes a right outer surface  212 B, a heart-shaped hole  213 B, a hole  218 B, and a matching surface  219 B. In other words, in the support body forming member  210 B, the heart-shaped hole  213 B is modified from the circular hole  203 B of the support body forming member  200 B, and an annular portion having the hole  218 B is added. Reference numerals for twelve projections are omitted from the drawings. 
       FIGS. 12(   b   1 ) to  12 ( b   4 ) are a left side view, a front view, a right side view, and a perspective view from above and the front right, respectively, showing a support body  210 . The support body  210  is formed by the support body forming member  200 A and the support body forming member  210 B by matching the matching surface  209 A with the matching surface  219 B and arranging a part of each projection forming a first fitting portion with a corresponding portion of the projection forming the first fitting portion. 
       FIGS. 12(   c   1 ) to  12 ( c   4 ) are a left side view, a front view, a right side view, and a perspective view from above and the front right, respectively, showing a support body forming member  220 B. 
     With reference to the drawings, the support body forming member  220 B includes a right outer surface  222 B, a star-shaped hole  223 B, a hole  228 B, and a matching surface  229 B. In other words, in the support body forming member  220 B, the star-shaped hole  223 B is modified from the heart-shaped hole  213 B of the support body forming member  210 B. Reference numerals for twelve projections are omitted from the drawings. 
       FIGS. 12(   d   1 ) to  12 ( d   4 ) are a left side view, a front view, a right side view, and a perspective view from above and the front right, respectively, showing a support body  220 , which is formed by the support body forming member  200 A and the support body forming member  220 B in the same manner as the support body  210 . 
     The circular hole  203 B, the heart-shaped hole  213 B, and the star-shaped hole  223 B each form a window through which an object received in the circular recessed portion  203 A is visible from the exterior. The shapes of the holes  203 B,  213 B, and  223 B may be modified to other shapes. Further, a transparent glass or plastic member may be fitted in the holes. 
     The circular recessed portion  203 A may have a shape other than the circular shape. Alternatively, a heart-shaped or star-shaped hole may be formed in the circular recessed portion  203 A. In this case, the object held in the circular recessed portion  203 A is visible from the side corresponding to the left outer surface  201 A of the support body forming member  200 A. 
     The hole  218 B and the hole  228 B are holes for facilitating joint between the display structure and other members. If a chain or a cord is passed directly or indirectly through the hole  218 B,  228 B, the display structure may be used as a pendant. 
     Alternatively, the display structure of the present invention may be connected to a pierced earring through a joint hole such as the hole  218 B or the hole  228 B. In this case, the display structure is used as an earring. 
     In the display structure of the present invention, the position or the extending direction of the joint hole, such as the hole  218 B or the hole  228 B, may be modified in such a manner that the display structure can be connected to a safety pin and used as a broach, a badge, or a name tag. 
     As has been described, by adding a structure, such as a hole, for facilitating joint to other members to the display structure of the present invention, the display structure may be used for various purposes. 
     Alternatively, with a surface of a photograph or a picture facing a transparent support body forming member, the photograph or the picture may be clamped between the support body forming member and another support body forming member. In this state, by joining the support body forming members through the display boards, the display structure may be used as a photograph stand or a frame. In this case, the circular hole or the heart-shaped hole may be omitted. 
     Alternatively, in this case, the dimensions and the positions of the second fitting portions and the first fitting portions may be adjusted in such a manner that the photograph or the picture may be clamped directly between the matching surfaces so that the circular recessed portion can be omitted. Further, if the display structure having such configuration has legs that are attached to the main outer surface or the proximity of the main outer surface of the display structure, the display structure may be held upright in a stable state with the main outer surface facing downward. Alternatively, the legs may be attached to the display structure in such a manner that the display structure can be held upright with the main outer surface facing upward or laterally. 
     The outline of the display structure may be changed from a thin columnar shape to a thin rectangular prism-like shape. 
     As to the configuration non-related to attachment/detachment of the display boards, corresponding portions of the support body forming members forming the support body of the present invention may be hinged together. In this case, when the display boards are all removed from the mounting portions, the support body forming members are prevented from separating from each other and being lost. Also, simply by matching the support body forming members about the rotary shaft of a hinge, the corresponding projections of the support body forming members are matched together accurately. This facilitates mounting of the display boards. 
       FIG. 13  includes diagrams showing a support body having a spherical shape, not a flat plate-like shape. 
       FIGS. 13(   a ) to  13 ( f ) are a top view, a left side view, a front view, a right side view, a bottom view, and a perspective view from above and the front right, respectively, showing a support body  230 . 
       FIGS. 13(   g ) and  13 ( h ) are a diagram from the side corresponding to the right surface and a diagram from above and the front right, respectively, showing the cross section of the support body  230  cut at the J-J position in  FIG. 13(   c ). The shaded area indicated by the reference numeral  236  indicates the J-J cross section. 
     As illustrated in  FIG. 13 , the support body  230  includes a left outer surface  231 , a right outer surface  232 , a main outer surface  234 , and mounting portions  105 . 
     Like the mounting portions  105  of the support body  100 , each of the mounting portions  105  of the support body  230  includes insertion ports  105   d , a display window portion  105   e , and projections  105   f . Reference numerals for window side walls, an opposing wall, groove bottom walls, and slide grooves are omitted from the drawings. 
     As illustrated in the drawings, the main outer surface may be connected to the left outer surface or the right outer surface through a curved surface, not in a mutually perpendicular manner. 
     The main outer surface and the left outer surface or the right outer surface may be arranged diagonally with respect to each other. In other words, the support body may have any suitable shape as long as the shape allows formation of the mounting portions. The functions of each display board with respect to the mounting portion are independent from the outline shape of the support body. 
     With reference to  FIG. 13 , the support body of the present invention does not necessarily have to include the circular recessed portion. The circular recessed portion may be formed depending on the purpose of the display structure. 
     In  FIG. 2 , each slide groove  105   k  extends linearly and perpendicularly to the left outer surface and the right outer surface. However, each slide groove of the support body  230  illustrated in  FIG. 13  does not extend perpendicularly to the left outer surface or the right outer surface. That is, there are cases in which the slide groove does not extend perpendicularly to the left outer surface or the right outer surface depending on the outline shape of the support body. Further, the slide groove does not necessarily have to be perpendicular to the left outer surface or the right outer surface. 
       FIG. 14  shows an example of a cross-shaped support body. 
       FIGS. 14(   a ) to  14 ( f ) are a top view, a left side view, a front view, a right side view, a bottom view, and a perspective view from above and the front right, respectively, showing a support body  240 . 
       FIGS. 14(   g ) and  14 ( h ) are a diagram from the side corresponding to the right surface and a diagram from above and the front right, respectively, showing the cross section of the support body  240  cut at the K-K position in  FIG. 14(   c ). The shaded area indicated by the reference numeral  246  indicates the K-K cross section. 
     As illustrated in  FIG. 14 , the support body  240  has mounting portions  105 . Each of the mounting portions  105  of the support body  240  has insertion ports  105   d , a display window portion  105   e , and projections  105   f . Reference numerals for a left outer surface, a right outer surface, a main outer surface, window side walls, an opposing wall, groove bottom walls, a bulging portion, and slide grooves are omitted from the drawings. 
     As illustrated in the drawings, the support body may be cross-shaped. 
     The support body  230  or the support body  240  may each be formed by two support body forming members as in the case of the support body  200 . 
     For example, the support body  230  and the support body  240  may be cut along the J-J cross section  236  and the K-K cross section  246 , respectively, and each divided into two support body forming members. In these cases, the support body forming members may be joined together by mounting the display boards in the mounting portions  105 , as in the case of the support body forming member  200 A and the support body forming member  200 B. 
     If a recessed portion is formed in the J-J cross section  236  or the K-K cross section  246 , along which the support body is cut, as in the case of the support body forming member  200 A, the recessed portion may be used as an accommodation space for an object. 
     The support body  230  or the support body  240  may each be formed by three or more support body forming members. The support body may be disassembled into the support body forming members by removing each display board from the corresponding mounting portion of the support body, which is formed by the multiple support body forming members. 
     As has been described with reference to  FIGS. 10 to 14 , using the structural characteristics of each support body forming member forming the support body of the present invention, each display board is allowed to function as an attachable/detachable joint tool without losing its function as a display board. 
     As illustrated in  FIGS. 13 and 14 , each mounting portion of the present invention may be formed in various bodies which are different in shape. Further, with reference to  FIGS. 10 to 12 , the support body may be divided into the support body forming members that may be joined together through the display boards, in such a manner that each mounting portion is divided into two portions. Also, by arranging an accommodation space between the support body forming members, a display structure capable of accommodating an object is provided. 
       FIG. 15  includes diagrams showing a support body  250 , a support body  260 , and a display board  330 , which are shaped differently from the above-described examples. 
       FIGS. 15(   a   1 ) to  15 ( a   3 ) are diagrams showing the support body  250  as viewed from various directions.  FIGS. 15(   b   1 ) to  15 ( b   3 ) are diagrams showing the support body  260  as viewed from various directions.  FIGS. 15(   c   1 ) to  15 ( c   3 ) are diagrams showing the display board  330  as viewed from various directions. 
       FIGS. 15(   a   1 ) to  15 ( a   3 ) are a left side view, a front view, and a right side view, respectively, showing the support body  250 . Reference numerals for a left outer surface, a right outer surface, window side walls, an opposing wall, groove bottom walls, a main outer surface, insertion ports, and slide grooves are omitted from the drawings. 
     With reference to the drawings, the support body  250  has bulging portions  105   g  on the sides corresponding to the window side walls. Projections  105   f  are arranged on the bottoms of the slide grooves on the sides corresponding to the opposing walls. Since display window portions  251  are transparent, the main outer surface of the support body  250  includes neither cutaway portions nor holes. 
     In other words, forming the display window portions  251  using transparent material makes it unnecessary to form cutaway portions or holes in the main outer surface as window portions. This makes it possible to form the bulging portions on the sides corresponding to the window side walls. 
     As has been described, the display window portions of the support body of the present invention may be formed of transparent material, not by cutaway portions or holes. Also, each bulging portion may be arranged on the side corresponding to the window side walls. The material and the position of each display window portion and those of each bulging portion may be selected in correspondence with use of the display structure or the cost for manufacturing the display structure. 
     The projections forming the first fitting portions may be arranged on either the window side walls or the opposing walls. If each bulging portion, along which the corresponding display board moves in a bending manner when the display board is inserted into the insertion space, is located on a wall opposing the wall having the projections forming the first fitting portions, the projections must be arranged on or in the vicinities of the bottoms of the corresponding slide grooves. As a result, regardless of whether the projections are arranged on the side corresponding to the window side walls or the sides corresponding to the opposing wall, the portion of each display board between the side portions on both sides is effectively bent in a convex shape or a concave shape with respect to the side portions. 
     If the projections forming the first fitting portions are also the bulging portions along which the display boards move in a bending manner when inserted and thus the bulging portions are not formed in the walls opposing the walls having the projections, each of the projections must be located in or in the vicinity of a middle position between the slide grooves on both sides. As a result, regardless of whether each projection is arranged on the side corresponding to the window side wall or the side corresponding to the opposing wall, the portion of each display board between the side portions on both sides is effectively bent in a convex shape or a concave shape with respect to the side portions. 
       FIGS. 15(   b   1 ) to  15 ( b   3 ) are a left side view, a front view, and a right side view, respectively, showing a support body  260 . Unlike the support body  100 , the support body  260  has projections  265   f , each of which is arranged at a position slightly closer to a display window portion than the bottom of a slide groove. The support body  260  is shaped identically with the support body  100  except for the positions of the projections  265   f.    
     Reference numerals for a left outer surface, a right outer surface, a main outer surface, mounting portions, window side walls, opposing walls, groove bottom walls, insertion ports, display window portions, bulging portions, and slide grooves are omitted from the drawings. 
       FIGS. 15(   c   1 ) to  15 ( c   3 ) are a top view, a bottom view, and a perspective view from above and the front right, respectively, showing a display board  330  mounted in the support body  260 . 
     As illustrated in the drawings, the display board  330  has fitting holes  339 , which are arranged in the vicinities of side portions  335  and fitted to the projections  265   f  of the support body  260 . If the height of each of the projections  265   f  is adjusted, the fitting holes  339  can be formed as dents. 
     Although the top surface of the display board  330  illustrated in  FIG. 15(   c   1 ) displays “0”, by way of example, any suitable object may be displayed on the top surface of the display board  330  as needed when in use. 
     The examples of the display boards that may be used in the present invention have been described with reference to the drawings. However, in the display boards other than the display board  310  and the display board  320  usable for the support body  140 , the back surface and the display surface of each display board may be switched so that the back side is used as the display surface. As long as the holes or the dents forming the second fitting portions are located at positions other than the center of the back surface and the vicinity of the center as in the case of, for example, the display board  300  and the display board  330 , the back surface may be used as the display surface without deteriorating the aesthetic appearance. Even if the back surface of the display board  300  or the display board  330  is used as the display surface, each second fitting portion of the display board  300 ,  330  functions as the second fitting portion. 
     Each display board may be curved uniformly as a whole, as long as the projections forming the first fitting portions are arranged at mutually opposing positions on or in the vicinities of the bottoms of the slide grooves on both sides and the corresponding bulging portion formed on the wall opposing the walls having the projections is a moderately curved surface and has a uniform radius of curvature. 
     A specific example will hereafter be described using the support body  100  and the display boards  300 . As illustrated in  FIGS. 1 and 2 , the bulging portion  105   g  formed on each opposing wall  105   b  has a uniform radius of curvature and is a moderately curved surface. As each display board  300  is inserted into the corresponding insertion space  105   j , the two projections  105   f  arranged at the mutually opposing positions on the bottoms of the slide grooves  105   k  on both sides on the sides corresponding to the window side walls  105   a  depresses the side portions  305  on both sides of the display board  300  toward the side corresponding to the opposing wall  105   b . As a result, the display board  300  is bent uniformly along the bulging portion  105   g  with the portion of the display board  300  in the vicinity of the center of the back surface  302  supported by the bulging portion  105   g.    
     Specifically, such uniform bending of the display board has an advantage in that a plastic or metal material difficult to bend may be used as the material of the display board and that excessive bending and whitening of a deformed portion are prevented from happening. As a result, the display board may be formed of various types of plastics and metals. 
     If the bulging portion on the opposing wall or the window side wall is formed as a moderately curved surface, the display board contacts the bulging portion over a large surface area without being intensely locally scratched when inserted into the insertion space. This prevents intense friction damage to the proximities of the centers of the display surface and the back surface of the display board. As a result, a number or a character or a code may be displayed on the back surface and the back surface and the display surface may be switched for use. 
     The support body  240  has four mounting portions  105  and the other support bodies each have six mounting portions  105 . However, the number of the mounting portions arranged in each support body is not restricted to any number and may be one, two, five, or eight. That is, the mounting portions may be arranged in the support body by a number suitable for use. 
     The number of the projections each forming the first fitting portion may be varied from one mounting portion to another in one support body. The number of the projections of each mounting portion is not restricted to any number as long as the display board and the support body are engageable with each other, in other words, as long as the first fitting portions are formed. 
     In the case of the support body  120 , the press-out holes do not necessarily have to be formed if it is unnecessary to remove the display boards after the display boards are mounted. 
     Each mounting portion of the support body  100 , the support body  110 , and the support body  140  is shaped symmetrical with respect to the A-A cross section  106 A, the A-A cross section  116 A, and the F-F cross section  146 F, respectively. However, the mounting portions do not necessarily have to be shaped symmetrical. 
     If the mounting portions of each support body are not shaped symmetrically with respect to the corresponding cross sections, the distance between the side portions on both sides of each display board and the distance between the leading portion and the trailing portion of the display board may be determined in correspondence with the width of each insertion port or the depth of the mounting portion. Also, each second fitting portion of the display board may be formed at a position corresponding to the position and the shape of the corresponding first fitting portion of the mounting portion. Further, the thickness between the display surface and the back surface may be determined in correspondence with the shape of the mounting portion. In other words, the display boards do not necessarily have to be shaped symmetrically either. 
     Each mounting portion of the support body  100 , the support body  110 , the support body  140 , and the support body  200  has the insertion ports on both of the side corresponding to the left outer surface and the side corresponding to the right outer surface. However, the support body may have insertion ports only on one of the side corresponding to the left outer surface and the side corresponding to the right outer surface. Also, the insertion ports may be formed on different sides from one mounting portion to another in one support body. In other words, one of the mounting portions may have an insertion only on the side corresponding to the left outer surface when another one of the mounting portions has an insertion port only on the side corresponding to the right outer surface and another one of the mounting portions has insertion ports on both of the side corresponding to the left outer surface and the side corresponding to the right outer surface. 
     As has been described, in the display structure formed by the display boards and the support body of the present invention, even if the display board has insufficient deformation property and insufficient shape restoration property, and being small in size, it is possible to attach and detach the display board with respect to the support body. As a result, the display structure as a whole or the display board solely may be reduced in size. 
     Also, the support body may be divided into a plurality of support body forming members, and each display board may be used as an attachable/detachable joint member. Further, by forming an accommodation space between the support body forming members that are joined together, an object may be selectively accommodated in and removed from the accommodation space. 
     As has been described, there are various uses for the display structure of the present invention. Alternatively, the two support body forming members forming the support body may be joined together through a hinge. With reference to  FIGS. 16 and 17 , various applications of the display structure of the present invention will hereafter be described. 
       FIG. 16(   a ) is an exploded perspective view showing a dial lock  550  configured by a lock body  500 , three display structures  20  each functioning as a dial member, a shaft  510  serving as a rotary shaft for the display structures  20 , and a locking member  520  having a plurality of projections locked to the display structures  20 . 
       FIG. 16(   b ) is a right side view showing each of the display structures  20  and  FIG. 16(   c ) is a perspective view showing the display structure  20  as viewed from above and the front right, as enlarged compared to  FIG. 16(   a ). Each display structure  20  is shaped bilaterally symmetrical except for an object displayed on a display board  300 . 
     As illustrated in  FIGS. 16(   b ) and  16 ( c ), the display structure  20  is formed by mounting each of the display boards  300  in a corresponding one of six mounting portions formed in a support body  600 . 
     In order to function as the dial member of the dial lock  550 , each display structure  20  includes a hole  601  through which the shaft  510  is passed and a cutaway portion  602  through which the projections of the locking member  520  are moved when the dial lock  550  is unlocked. 
     The structural characteristics and relationships with attachment/detachment of the support body  600  and the display boards  300  are the same as the characteristics and relationships of configuration related to attachment/detachment of the support body  100  and the display boards  300 . 
     As has been described, the display structure of the present invention may be used as a dial member of a dial lock. 
       FIG. 17  includes diagrams illustrating various applications of the display structure of the present invention. 
     Specifically,  FIGS. 17(   a ) to  17 ( i ) each show an example of the display structure of the present invention. 
       FIGS. 17(   a ) to  17 ( i ) are perspective views showing an animal collar  30 , a head band  35 , a bracelet  40 , a photo stand  45 , and a bolt  50  with a nut  55 , a garment belt  60 , a watch band  65 , a ballpoint pen  70 , and a bag  75 , respectively. 
     These display structures may be configured by mounting the display boards  300  displaying a name or a date in a support body, which forms a base. 
     Alternatively, the display structures may be configured by mounting the display boards  300  displaying various colors or patterns in a support body forming a base. 
     The support body forming the base of the photo stand  45  is formed by two support body forming members. Accordingly, the display boards  300  can be mounted after a photo is arranged between the support body forming members. 
     Alternatively, the display structure of the present invention may be embodied as, for example, a frame using the same configuration as that of the photo stand  45 . 
     Each of the display structures illustrated in  FIGS. 17(   a ) to  17 ( i ) includes a plurality of mounting portions  105 , each of which receives a display board  300 . However, the mounting portions  145  may be employed instead of the mounting portions  105  and the display boards  310  may be used. In other words, various display structures may be formed using the mounting portions and the display boards having the characteristics of the present invention. 
       FIG. 17(   j ) is a perspective view showing a support body  280  in which the support body forming member  200 A and the support body forming member  200 B are connected to each other through a single hinge  281 . 
     The support body forming members may be hinged together in this manner. 
     The various applications of the display structure of the present invention have been described so far with reference to  FIGS. 16 and 17 . However, the display structure of the invention is not restricted to the above-described examples and may be used for other purposes. Further, additional components such as a hinge may be added to the display structure of the invention as long as the attachment/detachment structure of the display board, which is the technical characteristic of the display structure, is ensured. 
     INDUSTRIAL APPLICABILITY 
     By modifying the circular recessed portion to be a through hole extending from the left outer surface to the right outer surface and adjusting the size of the display structure of the invention as a whole, the display structure may be used as a ring, a bracelet, or a dial member of a dial lock. Alternatively, by shaping the outline of the support body in a C-shape, the display structure may be used as a head accessory including a head band or a hair pin. 
     Also, by adding an additional component such as a chain, a cord, a buckle, or a safety pin to the display structure, the display structure may be used as a necklace, a broach, a pendant, a badge, a charm card, a name tag, an ID tag, a collar for animals including dogs and cats, a shipping tag, or a baggage tag. 
     As has been described, the display structure of the present invention can be assembled and disassembled by a user. As a result, the display structure provides a wide variety of inexpensive display structures. 
     DESCRIPTION OF THE REFERENCE NUMERALS 
     
         
           10 ,  20  Display Structure 
           30  Collar 
           35  Head Band 
           40  Bracelet 
           45  Photo Stand 
           50  Bolt 
           55  Nut 
           60  Belt 
           65  Watch Band 
           70  Ballpoint Pen 
           75  Bag 
           100 ,  110 ,  120 ,  130 ,  140 ,  200 ,  210 ,  220 ,  230 ,  240 ,  250 ,  260 ,  280 ,  600  Support body 
           101 ,  141 ,  201 A,  231  Left Outer Surface 
           102 ,  142 ,  202 B,  212 B,  222 B,  232  Right Outer Surface 
           103 ,  143 ,  203 A Circular Recessed Portion 
           104 ,  144 ,  204 A,  204 B,  234  Main Outer Surface 
           105 ,  145  Mounting Portion 
           105   a ,  145   a  Window Side Wall 
           105   b ,  145   b  Opposing wall 
           105   c ,  145   c  Groove Bottom Wall 
           105   d ,  145   d  Insertion Port 
           105   e ,  115   e ,  145   e ,  251  Display Window Portion 
           105   f ,  145   f ,  205   f A,  205   f B,  265   f  Projection 
           105   g  Bulging Portion 
           105   h  Recessed Portion 
           105   j  Insertion Space 
           105   k ,  145   k  Slide Groove 
           106 A A-A Cross Section 
           106 B B-B Cross Section 
           116 A A-A Cross Section of Support body  110   
           116 B B-B Cross Section of Support body  110   
           126 B B-B Cross Section of Support body  120   
           127  Press-Out Hole 
           138  Press-Out Groove 
           146 F F-F Cross Section 
           146 G G-G Cross Section 
           200 A,  200 B,  200 Ba,  200 Bb,  210 B,  220 B Support Body Forming Member 
           203 B Circular Hole 
           206 A H-H Cross Section of Support body Forming Member  200 A 
           206 B H-H Cross Section of Support body Forming Member  200 B 
           209 A,  209 B,  219 B,  229 B Matching Surface 
           213 B Heart-Shaped Hole 
           218 B,  228 B Hole 
           223 B Star-Shaped Hole 
           236  J-J Cross Section 
           246  K-K Cross Section 
           281  Hinge 
           300 ,  310 ,  320 ,  330  Display Board 
           301 ,  311 ,  321  Display Surface 
           302 ,  312 ,  322  Back Surface 
           303 ,  313 ,  323  Leading Portion 
           304 ,  314  Trailing Portion 
           305 ,  315 ,  335  Side Portion 
           306  Cutaway Portion 
           317 ,  327  Recessed Portion 
           339  Fitting Hole 
           500  Lock Body 
           510  Shaft 
           520  Locking Member 
           550  Dial Lock 
           601  Hole 
           602  Cutaway Portion 
           902  Telephone Set 
           907  Sheet Insertion Port 
           908  Sheet 
           908   b  Holding Portion 
           908   c  Small Hole 
           909  Body 
           909   a  Stopper Projection 
           910  Transparent Member 
           911  Sheet Guide 
           911   b  Projection