Display panel

Abstract

To provide a display panel that can accommodate variations in the thickness of display sheets. [Solution] The display panel 10 of this disclosure holds the display sheet 90 in a visible state by sandwiching the outer edge of the display sheet 90 from the front and back between the subframe 52 (front support part) and the base part 11 (rear support part). In addition, multiple contact protrusions 16 protrude from the front outer edge of the base part 11 and are pressed against the outer edge of the display sheet 90.

Description

Technical Field

[0001] This disclosure relates to a display panel.

Background Art

[0002] As this type of display panel, there is known one that sandwiches the outer edge portion of a display sheet with characters or the like between a front support portion and a rear support portion from the front and rear to hold the display sheet in a visible state (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the above-described conventional display panel, it has been difficult to cope with variations in the thickness of the display sheet. In the present application, a display panel capable of coping with variations in the thickness of the display sheet is disclosed.

Means for Solving the Problems

[0005] A first aspect according to the invention of this disclosure is a display panel that sandwiches the outer edge portion of a display sheet with characters or a pattern between a front support portion and a rear support portion from the front and rear to hold the display sheet in a visible state, and includes an abutting protrusion that protrudes from either the front support portion or the rear support portion and is pressed against the display sheet.

Effects of the Invention

[0006] According to the display panel of the first embodiment of this disclosure, by providing a contact projection on either the front support portion or the rear support portion that sandwiches the outer edge of the display sheet from both sides, it becomes possible to partially deform either the front support portion or the rear support portion. That is, compared to conventional displays that require the entire front support portion or rear support portion to be deformed in order to absorb variations in the thickness of the display sheet, the display panel of Feature 1 can easily absorb variations in the thickness of the display sheet and can easily accommodate display sheets of various thicknesses. [Brief explanation of the drawing]

[0007] [Figure 1] Figure 1 is a perspective view of the front side of the display panel of the first embodiment. [Figure 2] Figure 2 is a perspective view of the front of the display panel with the display sheet removed. [Figure 3] Figure 3 is a perspective view of the rear side of the display panel. [Figure 4] Figure 4 is a perspective view of the rear side of the frame. [Figure 5] Figure 5 is a magnified perspective view of a portion of the rear of the frame. [Figure 6] Figure 6 is a plan cross-sectional view of the portion of the display panel equipped with a locking member. [Figure 7] Figure 7A is a perspective view of the front side of the locking member, and Figure 7B is a perspective view of the back side of the locking member. [Figure 8] Figure 8 is a perspective view of the portion of the display panel that is equipped with a locking mechanism. [Figure 9] Figure 9 is a perspective view of the front side of the base unit. [Figure 10] Figure 10 is a perspective view of the rear side of the base unit. [Figure 11] Figure 11 is a plan view of the hinge connection between the base body and the leg section. [Figure 12] Figure 12 is a perspective view of the rear side of the display panel with the legs folded. [Figure 13] Figure 13 is a plan view of the display panel near the front-to-rear positional collision point. [Figure 14]Figure 14A is a rear view of the locking member and locking member mounting part according to the modified example, and Figure 14B is a side cross-sectional view of the locking member and locking member mounting part according to the modified example. [Figure 15] Figure 15 is a plan cross-sectional view of the portion of the display panel equipped with a locking member, according to a modified example. [Figure 16] Figure 16A is a perspective view of the portion of the modified display panel equipped with a locking member, and Figure 16B is a perspective view of the portion of the modified display panel equipped with a locking member. [Modes for carrying out the invention]

[0008] Hereinafter, an embodiment of the display panel 10 of the present disclosure will be described with reference to Figures 1 to 13. As shown in Figure 1, the display panel 10 holds the display sheet 90 in a visible state and has a base portion 11 (see Figure 2) that is superimposed on the back surface of the display sheet 90 (for example, a metal or resin plate with characters or a design on the front surface), and a frame 50 into which the base portion 11 can be fitted together with the display sheet 90. Also, as shown in Figure 3, legs 70 are hinged to the rear surface of the display panel 10, and the display panel 10 can be stood upright by opening the legs 70. Hereinafter, each component of the display panel 10 will be described.

[0009] The frame 50 has a symmetrical structure and comprises, for example, a frame body 50H and a plurality of locking members 64 that are slidably assembled to the rear surface.

[0010] The frame body 50H is, for example, a blow-molded product, as shown in Figure 4 in its standalone state, and has a structure in which a subframe 52 protrudes inward from the inner surface of a vertically elongated rectangular main frame 51. Each side of the subframe 52 is in the shape of a strip of a certain width and is positioned on the front edge of the inner surface of the main frame 51. Also, as shown in Figure 2, the front surface of the subframe 52 and the front surface of the main frame 51 are flush.

[0011] Specifically, the entire sub-frame 52 has a cross-sectional structure in which, for example, two parisons used for blow molding are closely adhered to each other. The main frame 51 has an overall hollow structure and has a front wall 51A and a rear wall 51B that face each other with an inner space therebetween (see FIG. 6). The front wall of the two-layered sub-frame 52 is continuous with the front wall 51A of the main frame 51 (see FIG. 2), and the rear wall of the two-layered sub-frame 52 is bent at a right angle to form an inner wall 51C (see FIG. 4) that has the inner surface of the main frame 51. Further, at the inner four corners of the main frame 51, corner relief portions 51D are formed by curving the inner wall 51C so as to bulge outward.

[0012] As shown in FIG. 4, the lower side portion of the main frame 51 is larger in the width direction than the upper side portion and both side portions, and at an intermediate portion in the vertical direction, a pair of horizontally long rectangular openings 51W are formed side by side in the horizontal direction. Both end portions on the sides of the pair of openings 51W that are separated from each other are arranged offset toward the central side in the horizontal direction of the main frame 51 from the pair of corner relief portions 51D. Further, the upper side portion of the lower side portion of the main frame 51 that is above the pair of openings 51W has the same width as the upper side portion and both side portions of the main frame 51. Further, the lower end portion of the main frame 51 has a shape in which three locations, namely, both end portions and the central portion in the horizontal direction, slightly protrude downward.

[0013] On the rear surface of the lower side portion of the main frame 51, leg receiving grooves 53M extending in the vertical direction are formed at three locations, namely, positions near both ends and the central position in the horizontal direction. The pair of leg receiving grooves 53M on both sides penetrate the entire lower side portion of the main frame 51 in the vertical direction. A beam receiving groove 53N is formed so as to connect between intermediate portions of the pair of leg receiving grooves 53M, and the beam receiving groove 53N is divided into two locations in the intermediate portion by the pair of openings 51W described above. Further, the central leg receiving groove 53M extends only above the beam receiving groove 53N. The bottom surfaces of the leg receiving grooves 53M and the beam receiving groove 53N are continuous and flush.

[0014] Below the pair of openings 51W of the lower side of the main frame 51, there are a pair of lower end bars 53L extending in the horizontal direction. Each lower end bar 53L has a strip shape, and the rear surface of the lower end bar 53L is located behind the bottom surfaces of the leg receiving groove 53M and the beam receiving groove 53N and in front of the rear surface of the entire frame body 50H, and the front surface of the lower end bar 53L is located behind the front surface of the entire frame body 50H as shown in FIG. 1.

[0015] As shown in FIG. 4, on the rear surface of each side of the main frame 51, groove portions penetrating a part of each side portion in the width direction are formed, and the bottom surfaces of these groove portions form the lock member mounting portions 54. The lock member mounting portions 54 are provided at the central portion in the vertical direction and positions near both ends on each side portion of the main frame 51, and are provided at positions near both left and right ends on the upper side portion and the lower side portion of the main frame 51. Also, each lock member mounting portion 54 forms, for example, a rectangle long in the longitudinal direction of each side where they are provided.

[0016] As shown in FIG. 5, in the central portion in the longitudinal direction of each lock member mounting portion 54, a slide engagement groove 54M (corresponding to the "guide portion") extending in the short direction is formed. One end portion of the slide engagement groove 54M opens to the inner surface of the main frame 51, while the other end portion of the slide engagement groove 54M is arranged at a position near the outer surface of the main frame 51. Also, a pair of latching grooves 54K orthogonal to the slide engagement groove 54M are formed at a position near the other end portion and the one end portion of the slide engagement groove 54M. Further, a pair of mounting holes 54L are formed on both sides sandwiching the slide engagement groove 54M at a position near the inner surface of the main frame 51.

[0017] As shown in Figure 4, on the rear surface of the main frame 51, an inner edge step portion 55 is formed by recessing the inner edge of the portion sandwiched between the lock member mounting portion 54. Each inner edge step portion 55 extends along each side of the main frame 51 and is not connected to the lock member mounting portion 54. Furthermore, the inner edge step portion 55 on the lower edge of the main frame 51 is divided into two by the aforementioned leg receiving groove 53M. The bottom surface of each inner edge step portion 55 becomes the base portion positioning surface 55T on which the front and rear positioning abutment portion 14 (see Figure 9) of the base portion 11, which will be described later, is superimposed.

[0018] The rear surface of the embankment-shaped portion of the main frame 51 that surrounds the base positioning surface 55T from three sides is the first rear surface 51X (corresponding to the "lock member protection portion" and "protruding portion") located furthest rear on the frame body 50H. The first rear surface 51X is provided on each side of the main frame 51 not only in the portion sandwiched between the lock member mounting portions 54, but also on the entire portion below the lower lock member mounting portion 54 and on the upper adjacent portion to the upper lock member mounting portion 54. On the lower side of the main frame 51, it is provided lateral to both lock member mounting portions 54, between the ends of a pair of lower end bars 53L that are close to each other, and lateral to the ends on the opposite side of those bars. On the upper side of the main frame 51, it is provided only in the portion sandwiched between the lock member mounting portions 54. Furthermore, a pair of second rear surfaces 51Y are provided, located slightly forward of the first rear surface 51X, between the pair of locking member mounting portions 54 on the upper edge of the main frame 51 and the upper corners of the main frame 51.

[0019] Three first rear surfaces 51X aligned along the lowest end of the lower edge of the main frame 51, and the central first rear surface 51X of the upper edge, each have engagement recesses 56K formed therein. The three engagement recesses 56K on the lower edge are rectangular in shape, while the engagement recess 56K on the upper edge is groove-shaped with open ends at both the top and bottom. The bottom surface of the engagement recess 56K on the upper edge is located behind the second rear surface 51Y. The depth of the engagement recesses 56K and the amount of protrusion of the engagement projection 57 (see Figure 1), described later, are approximately the same as the height difference between the first rear surface 51X and the second rear surface 51Y. It is possible to attach safety lights, construction lights, or light-emitting elements such as light-emitting elements or liquid crystals to the second rear surface 51Y and directly behind it.

[0020] As shown in Figure 2, on the front surface of the main frame 51, engaging protrusions 57 protrude from positions directly behind each engaging recess 56K and from positions directly behind a pair of second rear surfaces 51Y. Each engaging protrusion 57 has a rectangular planar shape. When two frames 50 or two display panels 10 with the base portion 11 fitted to the frame 50 are stacked on top of each other, some of the multiple engaging protrusions 57 of the rear frame 50 engage with the engaging recesses 56K of the front frame 50 in a concave-concave manner. Furthermore, the end faces of some of the engaging protrusions 57 overlap with the bottom surface of the engaging recess 56K, the end faces of the remaining engaging protrusions 57 overlap with the second rear surface 51Y of the front frame 50, and the front surface of the rear frame 50 overlaps with the first rear surface 51X of the front frame 50. As will be described later, when the display sheet 90 is held in the display panel 10, the display sheet 90 and the base portion 11 are housed in the frame 50 from the rear. The engaging protrusions 57 are evenly distributed in the short-side direction of the upper and lower edges, so that the frame 50 is stable when, for example, the front side is placed on the ground and the display sheet 90 and base portion 11 are housed in it.

[0021] As shown in Figure 2, multiple first grooves 58 are recessed on the front surface of the main frame 51, directly behind the aforementioned multiple lock member mounting portions 54 (see Figure 4). The bottom surface of the first grooves 58 is flat, and the aforementioned pair of mounting holes 54L of the lock member mounting portions 54 are open therein.

[0022] More specifically, as shown in Figure 6, a portion of the front wall 51A of the main frame 51 is recessed inward to a position opposite the inner surface of the portion of the rear wall 51B that has the locking member mounting portion 54, leaving a gap between them, thereby forming a first groove 58. The bottom wall 58A of the first groove 58 and the rear wall 51B are connected by a pair of support columns 58B (only one support column 58B is shown in Figure 6), and the aforementioned mounting holes 54L are formed so as to penetrate each support column 58B. The mounting holes 54L have, for example, a counterbore 58Z (corresponding to a "holding portion") with a hexagonal cross-section on the first groove 58 side. The counterbore 58Z has an inner surface and a bottom surface with a hexagonal cross-section, and the mounting holes 54L extend further rearward from the center of the bottom surface. As a result, the overlapping portion of the front wall 51A and the rear wall 51 forms a flat, stepped cross-section due to the inner surface, bottom surface, and rear of the mounting hole 54L of the counterbore 58Z. The hexagonal head portion H1 of the bolt B1 (corresponding to the "rear protruding member"), which will be described later, fits perfectly into this counterbore 58Z.

[0023] As shown in Figure 2, multiple second grooves 59 are recessed on both sides of the main frame 51, directly opposite the base positioning surfaces 55T (see Figure 4) mentioned above. Each second groove 59 is shallower than the multiple first grooves 58 and is a straight, rectangular groove.

[0024] As shown in Figures 2 and 4, multiple through-holes 60 are provided at multiple positions in the vertical direction on the outer edges of both sides of the main frame 51, penetrating the main frame 51 in the front-to-back direction. Of the multiple through-holes 60, all except those at the upper and lower ends of the frame 50 are located at both ends in the longitudinal direction of the second groove 59. The cross-sectional shape of each through-hole 60 is, for example, a rectangle. In addition, grooves 60A are formed on the outer edges of the front and rear surfaces of each main frame 51, communicating with each through-hole 60.

[0025] As shown in Figures 7A and 7B, the locking member 64 is a roughly rectangular plate, and has a pair of elongated holes 64L extending in the short direction at both ends in the longitudinal direction. The locking member 64 is then superimposed on the locking member mounting portion 54, as shown in Figures 6 and 8, and a pair of bolts B1, which are passed from the front through a pair of mounting holes 54L in the locking member mounting portion 54, are also passed through a pair of elongated holes 64L in the locking member 64 and screwed with nuts N1, thereby slidably attaching it to the frame body 50H. The locking member 64 then slides between a locked position, in which a portion of it protrudes inward from the inner edge of the main frame 51, and an unlocked position (unlocked position), in which it no longer protrudes.

[0026] Hereinafter, the side of the locking member 64 that protrudes from the main frame 51 in the locked position will be referred to as the "front side" of the locking member 64, the opposite side as the "rear side," the side that overlaps with the locking member mounting portion 54 as the "back side," and the opposite side as the "front side." The details of the locking member 64 will be explained below.

[0027] As shown in Figure 8, the locking member 64 is, for example, an injection-molded resin product and has a back wall 64A (corresponding to the "main plate portion") that overlaps the locking member mounting portion 54, a front wall 64B that is further away from the locking member mounting portion 54 than the back wall 64A, and ribs 64C perpendicular to them, with the height of the ribs 64C being the thickness of the locking member 64. As shown in Figure 7A, a pair of grooves 64M extending in the short direction are formed on the front side of the locking member 64 at both ends in the longitudinal direction of the locking member 64. The aforementioned elongated holes 64L are formed in the bottom wall of each groove 64M, which is part of the back wall 64A. Furthermore, sliding ridges 64T protrude from the opening edge of the elongated hole 64L in the bottom wall of the groove 64M. In addition, a bulge portion 64N is formed on the side wall (corresponding to the "opposing wall") of the groove 64M, which is part of the rib 64C, and bulges outward in an arc shape concentric with the semicircular arc at the rear end of the elongated hole 64L.

[0028] As shown in Figure 6, the bolt B1 has a hexagonal head portion H1 as described above, and the head portion H1 protrudes rearward from the lock member mounting portion 54 with the head portion H1 fitted into the counterbore portion 58Z at the front end of the mounting hole 54L. A cylindrical collar 63, for example made of stainless steel, is passed over the protruding portion, and the bolt B1 is passed through the elongated hole 64L of the lock member 64 together with the collar 63. A washer W1 (corresponding to the "rear protruding member" and "rear support portion") is then passed over the portion of the bolt B1 that protrudes from the collar 63, and then a nut N1 (corresponding to the "rear protruding member" and "rear support portion") is screwed on, and the collar 63 is sandwiched between the washer W1 and the lock member mounting portion 54. In this state, a small gap S1 is formed between the washer W1 and the sliding projection 64T. The screwing operation of the nut N1 is performed with the bolt B1 positioned at the rear end of the elongated hole 64L. Here, the rear end of the groove 64M is widened on the inside by the bulge 64N, so that a tool (for example, a socket wrench) fitted to the outside of the nut N1 can be easily inserted into the groove 64M. In other words, the bulge 64N acts as a "tool receiving portion". Furthermore, as described above, the mounting hole 54L and the counterbore 58Z are located in the thickened area where the bottom wall 58A, which is recessed in the front wall 51A, and the rear wall 51B are connected by the support column 58B. This increases the strength of the mounting hole 54L and the counterbore 58Z, preventing damage even if a load is applied to the mounting hole 54L or the counterbore 58Z via the bolt B1 when the locking member 64 is operated.

[0029] As shown in Figure 7A, a finger-grip recess 64U is formed between a pair of grooves 64M of the locking member 64 by recessing approximately half of the rear area. Furthermore, an engaging piece 65 is formed on the bottom wall of the finger-grip recess 64U, which is part of the back wall 64A, by cutting off a portion of it in a cantilevered shape. The engaging piece 65 protrudes forward from the rear end of the finger-grip recess 64U, and as shown in Figure 7B, a locking projection 65T is provided on the back surface of its tip, extending in the width direction of the engaging piece 65. When the locking member 64 is in the locked position, the locking projection 65T engages with the inner locking groove 54K of the pair of locking grooves 54K (see Figure 5) on the main frame 51, and when the locking member 64 is in the unlocked position, the locking projection 65T engages with the outer locking groove 54K of the pair of locking grooves 54K on the main frame 51.

[0030] As shown in Figure 7B, in the front half of the area between the pair of grooves 64M of the locking member 64, a surface wall 64B is provided instead of a back wall 64A, and a lattice-shaped reinforcing portion 64W is provided on the back side of the surface wall 64B, where a part of the ribs 64C intersect in a lattice pattern. Of the lattice-shaped reinforcing portion 64W, the rib 64C extending in the short direction of the locking member 64 at the center of the longitudinal direction of the locking member 64 is extended to protrude from the back surface of the locking member 64, forming a slide engagement projection 66 (corresponding to a "guide portion"). The slide engagement projection 66 slidably engages with the slide engagement groove 54M (see Figure 5) of the locking member mounting portion 54, thereby stabilizing the sliding position of the locking member 64. The engagement depth between the slide engagement projection 66 and the slide engagement groove 54M is greater than the gap S1 (see Figure 6) between the washer W1 and the sliding projection 64T, so that the slide engagement projection 66 and the slide engagement groove 54M engage even when the locking member 64 is positioned towards the rear, preventing lateral play. In addition, the front edge of the back surface of the locking member 64 is provided with an inclined portion 64S that rises as it extends forward.

[0031] As shown in Figure 3, the base portion 11 has a structure in which the aforementioned leg body 70 is hinged to the base portion body 11H. The leg body 70 is, for example, made of metal and has three leg portions 71 extending parallel to each other in the vertical direction, a beam portion 72 extending across the lower ends of the three leg portions 71 and, for example, welded or brazed to the leg portions 71, and a reinforcing plate 73 overlapping and welded or brazed from the rear to the connection portion between the beam portion 72 and the leg portion 71. The three leg portions 71 are, for example, square pipes, the leg portions 71 on both sides extend below the beam portion 72, while the central leg portion 71 does not extend below the beam portion 72. The upper ends of the three leg portions 71 are located at the same height and have the same shape. Specifically, the upper end of each leg portion 71 has a through hole 71A (see Figure 11) that penetrates horizontally, and the front upper end corner is chamfered to provide an inclined surface (not shown) that is inclined with respect to the longitudinal direction of the leg portion 71.

[0032] Figures 9 and 10 show the base body 11H as a single unit. The base body 11H is a vertically elongated plate shape and has a symmetrical form. The base 11 is, for example, a blow-molded product, has a hollow structure, and has a front wall 11A and a rear wall 11B facing each other across the internal space.

[0033] As shown in Figure 10, the rear wall 11B of the base body 11H is provided with, for example, three leg receiving grooves 12A for receiving the three legs 71 of the leg body 70, and a plurality of first and second reinforcing parts 12B, 12C for reinforcing the rear wall 11B.

[0034] The three leg receiving grooves 12A are formed by recessing the rear wall 11B into a rectangular groove shape, and extend from a position near the upper end of the base portion 11 to the lower end at the lateral center and both ends of the base portion 11, with the lower end opening downwards. Also, as shown in Figure 12, when the base portion body 11H is fitted into the frame 50, the three leg receiving grooves 12A of the base portion body 11H communicate with the three leg receiving grooves 53M of the frame 50. Then, each of the three legs 71 of the leg body 70 can be received in the leg receiving grooves 12A, 53M, and the beam portion 72 of the leg body 70 can be received in the beam receiving groove 53N of the frame 50.

[0035] As shown in Figure 10, the multiple first reinforcing parts 12B are constructed by recessing a portion of the rear wall 11B of the base body 11H into a linearly extending rectangular groove shape to bring it closer to the front wall 11A, and further recessing a portion of the bottom to connect it to the front wall 11A. The first reinforcing parts 12B are provided in a state where they extend vertically, for example at four locations horizontally in the vertical center of the rear wall 11B, and at two locations horizontally near the center of the upper and lower parts of the rear wall 11B, for example. They are also provided in a state where they extend along the diagonal of the base body 11, for example at four locations near the diagonal of the upper and lower parts of the rear wall 11B. The first reinforcing parts 12B that extend along the diagonal are directly or indirectly connected to a pair of first reinforcing parts 12B in the vertical center of the base body 11 via hinge connection recesses 12D, which will be described later.

[0036] Multiple second reinforcing sections 12C are formed by recessing the rear wall 11B in a rectangular concave shape and are distributed across the entire rear surface of the base section 11.

[0037] Hinge connection recesses 12D are formed on both sides of the upper part of the leg receiving groove 12A located in the central part of the base body 11H, and on the central side of the upper part of the pair of leg receiving grooves 12A located on both sides of the base body 11H. The hinge connection recesses 12D have a semi-elliptical cross-section and extend laterally from the base body 11. The pair of hinge connection recesses 12D on both sides of the central leg receiving groove 12A are connected to a pair of first reinforcing parts 12B, as described above.

[0038] Furthermore, on the side of the base body 11H opposite to the hinge connection recesses 12D for the leg receiving grooves 12A on both sides, a hinge connection recess 12E is formed, recessed from the side with the same cross-sectional shape as the hinge connection recess 12D.

[0039] As shown in Figure 11, a reinforcing recess 12F is formed in the base body 11H at a position directly opposite the portion between each leg receiving groove 12A and each hinge connecting recess 12D, 12E. As shown in Figure 9, the reinforcing recess 12F is formed by recessing a portion of the front wall 11A of the base body 11H into a rectangular shape, and the bottom of each reinforcing recess 12F is connected to the portion in the rear wall 11B between the aforementioned leg receiving grooves 12A and each hinge connecting recess 12D, 12E, as shown in Figure 11.

[0040] Support holes 12G are formed in the base body 11H so as to penetrate laterally through the wall between each leg receiving groove 12A and each hinge connecting recess 12D, 12E. With each leg 71 of the leg body 70 received in each leg receiving groove 12A, a hinge bolt B2, which serves as a hinge shaft member, is passed through the support hole 12G and the through hole 71A of the leg 71 and screwed with a nut N2, thereby rotatably supporting the leg body 70 on the base body 11H. Note that the hinge shaft member may be a mounting member other than the hinge bolt B2 and nut N2. Alternatively, the leg 71 may not have a through hole 71A, and the hinge shaft member may extend from the outer surface of the leg 71.

[0041] Based on Figure 11, it can be seen that the rear wall 11B and front wall 11A of the base body 11H have corrugated rear wall portion 20 and corrugated front wall portion 24, which have a corrugated shape in their planar cross-section and face each other. The upper part of the leg portion 71 is positioned between a pair of rear wall peaks 21 that protrude outward (rearward) from the rear wall corrugated portion 20, and a pair of front wall peaks 25 that protrude inward (rearward) from the front wall corrugated portion 24 are received inside the pair of rear wall peaks 21. The top portions of the pair of front wall peaks 25 are connected to the inner surface of the top portions of the pair of rear wall peaks 21. A support hole 12G is formed to penetrate laterally through the pair of rear wall peaks 21 and the pair of front wall peaks 25, and a hinge bolt B2 that passes through the support hole 12G also passes through the through hole 71A of the leg portion 71.

[0042] Furthermore, based on Figure 11, the above structure can also be understood as follows. Specifically, the rear wall 11B of the base body 11H has a rear first curved portion 22 that curves inward to protrude and whose outer surface is an external vertical groove 22M that receives the upper part of the leg portion 71, and a pair of rear second curved portions 23 that curve outward to protrude and share both sides with the rear first curved portion 22. On the other hand, the front wall 11A of the base body 11H has a front first curved portion 26 that curves outward to protrude and whose inner surface is an internal vertical groove 26M that receives the rear first curved portion 22, and a pair of front second curved portions 27 that curve inward to protrude and share both sides with the front first curved portion 26 and are received inside the rear second curved portion 23. Furthermore, the support hole 12G passes through the rear first curved portion 22 and a pair of rear second curved portions 23, and the front first curved portion 26 and a pair of front second curved portions 27, and the hinge bolt B2 that passes through the support hole 12G also passes through the through hole 71A of the leg portion 71.

[0043] As shown in Figure 10, the top, bottom, and both sides of the base portion 11 are provided with multiple front-to-rear positioning protrusions 14 corresponding to multiple base portion positioning surfaces 55T (see Figure 4) of the frame 50. As shown in Figure 9, each front-to-rear positioning protrusion 14 is a rectangular projection that protrudes from the rear portion of the top, bottom, and both sides of the base portion body 11H on which it is located, and extends in the longitudinal direction of the top, bottom, and both sides of the base portion body 11H. Furthermore, the thickness (size in the front-to-rear direction) of the front-to-rear positioning protrusion 14 is approximately the same as the height difference between the base portion positioning surface 55T and the first rear surface 51X of the frame 50. As shown in Figure 13, the portion of the base portion 11 in front of the front-rear positioning protrusions 14 (hereinafter referred to as the "fitting portion 11K") is fitted inside the main frame 51 of the frame 50, positioning the base portion 11 in the vertical and horizontal directions relative to the frame 50. At the same time, the front surfaces of each front-rear positioning protrusion 14 of the base portion 11 abut against each base portion positioning surface 55T of the frame 50, positioning the base portion 11 in the front-rear direction relative to the frame 50. The height difference between the base portion positioning surface 55T of the frame 50 and the rear surface of the subframe 52 is greater than the height difference between the front surface of the front-rear positioning protrusions 14 of the base portion 11 and the front surface of the fitting portion 11K, and a space 10S for housing the display sheet 90 is secured between the front surface of the fitting portion 11K and the subframe 52. Furthermore, the upper front-to-back positional protrusions 14 on both sides of the base portion 11 are divided into two by the aforementioned hinge connection recesses 12E (see Figure 10).

[0044] As shown in Figure 10, the base portion 11 has a recessed outer edge on its rear surface, providing multiple lockable portions 15 corresponding to the multiple locking members 64 of the main frame 51. The lockable portions 15 also have recesses 15A formed therein for receiving slide engagement protrusions 66. These recesses 15A are wider than the slide engagement grooves 54M, allowing the slide engagement protrusions 66 to be received even if the base portion 11 is misaligned with the frame 50. The base portion 11 is fitted inside the frame 50, and with the front surfaces of each front and rear positioning protrusion 14 of the base portion 11 in contact with each base portion positioning surface 55T of the frame 50, the locking member mounting portion 54 of the frame 50 and the bottom surface of the lockable portions 15 are positioned substantially flush. As shown in Figure 12, the base portion 11 is prevented from coming off the frame 50 when the locking member 64 slides into the locked position and overlaps the lockable portions 15. Furthermore, the rear surface of the base portion 11, which is secured to the frame 50, is positioned substantially flush with the first rear surface 51X of the frame 50.

[0045] As shown in Figure 9, the front surface of the base portion 11 is provided with multiple contact protrusions 16 along its entire outer edge. The contact protrusions 16, for example, have a circular, hollow dome shape in planar form, bulging forward, with a flat surface at the apex. The multiple contact protrusions 16 are arranged in a row at equal intervals along each outer edge of the base portion 11. When the base portion 11 is positioned in the front-rear direction relative to the frame 50 by contact between the multiple front-rear positioning protrusions 14 of the base portion 11 and the multiple base portion positioning surfaces 55T of the frame 50, the apex portions of the multiple contact protrusions 16 face the rear surface of the subframe 52 of the base portion 11 with a gap (not shown) between them (see Figure 6), and this gap is slightly smaller than the thickness of the display sheet 90.

[0046] As shown in Figure 10, multiple fitting recesses 17 are formed on the rear surface of the base portion 11 at positions directly opposite the multiple contact protrusions 16. However, no fitting recesses 17 are provided on the rear surface of the base portion 11 where the locking portion 15 is directly opposite the contact protrusions 16. Also, in the portion of the rear surface of the base portion 11 where the locking portion 15 overlaps with the locking portion 16, a part of the fitting recess 17 communicates with the locking portion 15. When the base portions 11 are stacked on top of each other, the multiple contact protrusions 16 of the rear base portion 11 are received by the fitting recesses 17 of the front base portion 11, and some of the contact protrusions 16 are received by the locking portion 15, so that the front surface of the upper base portion 11 overlaps with the rear surface of the lower base portion 11. Furthermore, even if the locking member 64 is provided on the base body 11H (locked portion 15) of the base portion 11, the rear surface of the locking member 64 is located in front of the rear surface of the base portion 11, so the contact projection 16 fits into the locked portion 15. The contact projection 16 and the fitting recess 17 may be elliptical or polygonal in shape.

[0047] This concludes the description of the configuration of the display panel 10 in this embodiment. Next, the operation and effects of this display panel 10 will be described. To use the display panel 10, the frame 50 with the base portion 11 removed is placed on the ground or the like with its front facing downwards. At this time, the multiple engaging protrusions 57 of the frame 50 touch the ground or the like, and the entire front surface of the frame 50 is lifted off the ground or the like, so the entire front surface of the frame 50 is less likely to get dirty.

[0048] The display sheet 90 and the base portion 11 are housed in the frame 50 from the rear. Then, as shown in Figure 12, the multiple locking members 64 of the frame 50 are slid from the unlocked position to the locked position. As a result, the multiple locking members 64 rest on the multiple locked portions 15 of the base portion 11, and the base portion 11 is pushed forward relative to the frame 50. This causes the multiple front-to-back positioning portions 14 of the base portion 11 to be pressed against the multiple base portion positioning surfaces 55T of the frame 50, positioning the base portion 11 in the front-to-back direction relative to the frame 50. At the same time, as shown in Figure 6, the multiple contact portions 16 are pressed against the display sheet 90 and compressed or deformed, or the front wall 11A of the base portion 11 bends, and the outer edge of the display sheet 90 is sandwiched between the subframe 52 and the multiple contact portions 16 due to their elastic force.

[0049] In this case, the fitting portion 11K, which is the front part of the base portion 11, is housed inside the inner wall 51C of the main frame 51 together with the display sheet 90, so that the display sheet 90 does not get caught between the front-rear positioning abutment portion 14 and the base portion positioning surface 55T. Furthermore, in this embodiment, the locking member 64 is configured to slide along the rear surface of the frame 50 between the unlocked position and the locked position, and it is possible to house the display sheet 90 and the base portion 11 by releasing the locking member 64 with the locking member 64 in the unlocked position. Therefore, the operation of attaching and detaching the base portion 11 to the frame is easier than with conventional display panels that have a configuration in which the locking member is elastically deformed to the rear.

[0050] In this state, for example, as shown in Figure 1, the legs 70 can be opened relative to the panel body 10H (the part of the display panel 10 other than the legs 70), and the display panel 10 can be stood upright on the ground or the like for use. Also, as shown in Figure 12, when the legs 70 are folded, the beam portion 72 overlaps with the opening 51W of the panel body 10H, so by placing a hand on the beam portion 72, the legs 70 can be easily opened relative to the panel body 10H. When the legs 70 are opened to a predetermined angle, the inclined surface (not shown) at the upper end of the legs 70 comes into contact with the bottom surface of the leg receiving groove 12A of the panel body 10H, and the display panel 10 can be stood upright in a suitable position. Furthermore, as shown in Figure 3, by placing multiple weights 95 between the lower end bar 53L of the upright display panel 10 and the beam portion 72 of the leg body 70, and allowing the lower surface recess 95A of each weight 95 to be received by the lower end bar 53L and the beam portion 72, the weights 95 become stable, and the upright position of the display panel 10 also becomes stable. In this embodiment, the thickness of the lower end bar 53L is smaller than the overall thickness of the frame body 50H, but by matching the thickness of the lower end bar 53L to that of the weights 95, it becomes possible to reuse existing weights 95.

[0051] To keep multiple display panels 10 together without using them individually, the legs 70 of the display panels 10 can be folded, and each display panel 10 can be stacked in the same orientation. In this way, the engaging projections 57 (see Figure 1) of the rear display panel 10 fit into the multiple engaging recesses 56K (see Figure 4) of the front display panel 10, preventing the front and rear display panels 10 from shifting, and allowing multiple display panels 10 to be easily stored together.

[0052] Furthermore, even when the display panel 10 is divided into a frame 50 and a base portion 11, and multiple frames 50 are stacked in the same orientation, the engagement of the engaging recess 56K and the engaging projection 57 similarly prevents the frames 50 from shifting. Similarly, when multiple base portions 11 are stacked in the same orientation, the contact projection 16 (see Figure 9) of the rear base portion 11 fits into the fitting recess 17 (see Figure 10) of the front base portion 11, preventing the base portions 11 from shifting. Moreover, the same principle of preventing shifting applies to the frames 50H before the locking member 64 is assembled, and to the base portion bodies 11H before the leg bodies 70 are assembled. As a result, during the manufacturing process of the display panel 10, it is possible to easily store multiple frames 50H and multiple base portion bodies 11H as components of the display panel 10.

[0053] Furthermore, unused frames 50 can be placed on the ground or other surface with their rear surfaces facing downwards. In this case, the first rear surface 51X, which is located furthest back on the frame body 50H and behind the locking members 64, is positioned on either side of the locking members 64. As a result, the first rear surface 51X comes into contact with the ground or other surface, causing the locking members 64 to be lifted, thus preventing damage to the locking members 64.

[0054] Furthermore, since the rear surface of the base portion 11, which is secured to the frame 50, is positioned almost flush with the first rear surface 51X of the frame 50, when the display panel 10, with the frame 50 attached to the base portion 11, is placed on the ground or the like with its rear surface facing downwards, the rear surface of the base portion 11 and the first rear surface 51X of the frame 50 will come into contact with the ground or the like, thus stabilizing the placement of the frame 50.

[0055] However, the display panel 10 is subject to a large load at the hinge connection between the leg portion 71 and the base portion body 11H, which may raise durability concerns. In contrast, in the display panel 10 of this embodiment, as shown in Figure 11, the rear wall 11B and front wall 11A of the base portion body 11H, which is a hollow structural component, have a rear wall corrugated portion 20 and a front wall corrugated portion 24 formed therein. A pair of rear wall peaks 21 that protrude outward from the rear wall corrugated portion 20 receive a pair of front wall peaks 25 that protrude inward from the front wall corrugated portion 24. The upper part of the leg portion 71 is positioned between the pair of rear wall peaks 21, and a hinge bolt B2 passes through the pair of rear wall peaks 21, the pair of front wall peaks 25, and the upper part of the leg portion 71. Thus, in the display panel 10 of this embodiment, the portion of the base body 11H, which is a hollow structural component, that supports the hinge bolt B2 has a double-wall structure in which the front wall 11A and the rear wall 11B overlap, thereby improving durability. Moreover, in the display panel 10 of this embodiment, the front wall corrugated portion 24 and the rear wall corrugated portion 20 are partially connected, which increases the strength of the portion of the base body 11H that supports the hinge bolt B2, resulting in high durability. As a result, the display panel 10 can be used for a long period of time. In this embodiment, the top portions of a pair of front wall peaks 25 (the top portion of at least one peak of the front wall corrugated portion 24) are connected to the top portions of a pair of rear wall peaks 21 (the back portion of the top portion of the peak of the rear wall corrugated portion 20). However, in addition to or instead of this, for example, the middle portion of at least one peak of the front wall corrugated portion 24 may be connected to the back portion of the middle portion of the peak of the rear wall corrugated portion 20. Furthermore, the entire front wall corrugated section 24 and the entire rear wall corrugated section 20 may be connected in a double-layered configuration.

[0056] Furthermore, the display panel 10 can be used with various types of display sheets 90. In the case where the display panel is configured to hold the display sheet by pressing it between the frame and the base, if the display sheet is changed to a thicker one, the rear surface of the base may shift backward relative to the rear surface of the frame, making it impossible to move the locking member to the locked position. In contrast, in the display panel 10 of this embodiment, the multiple front-to-back positioning protrusions 14 of the base portion 11 abut against the multiple base portion positioning surfaces 55T of the frame 50, positioning the base portion 11 in the front-to-back direction relative to the frame 50, and a space 10S is secured between the subframe 52 and the base portion 11. As long as the thickness of this space 10S is within the limits of the thickness of the display sheet 90, the forward position of the base portion 11 relative to the frame 50 remains constant, and the locking member 64 can be operated. Therefore, the display panel 10 of this embodiment can accommodate multiple types of display sheets with different thicknesses.

[0057] Furthermore, variations in the thickness of the display sheet 90 (for example, within the range of manufacturing tolerances and precision errors that are generally accepted, or differences in thickness depending on the type of display sheet 90) can result in differences in how the display sheet 90 is held. If the display panel 10 does not have multiple contact protrusions 16, and the subframe 52 and base portion 11 are in surface contact with the entire outer edges of both the front and back surfaces of the display sheet 90, then, for example, if the display sheet 90 is too thin, a gap may form between the subframe 52 and base portion 11 and the display sheet 90, allowing wind to enter and causing the display sheet 90 to ripple. Also, if the display sheet 90 is too thick, the base portion 11 may not fit completely inside the frame 50 along with the display sheet 90. However, in the display panel 10 of this embodiment, by providing a plurality of contact protrusions 16 on the outer edge of the front surface of the base portion 11, these contact protrusions 16 partially contact the outer edge of the display sheet 90, allowing the base portion 11 to be partially and easily deformed, and thus absorbing variations in the thickness of the display sheet 90. In other words, according to the display panel 10 of this embodiment, the plurality of contact protrusions 16 are pressed against the display sheet 90 with appropriate contact pressure, preventing problems such as the display sheet 90 becoming wavy or the base portion 11 not fitting completely into the frame 50.

[0058] Specifically, in the display panel 10 of this embodiment, the base portion 11, which has multiple contact protrusions 16, is a blow-molded product with a hollow structure. Therefore, the front wall 11A of the base portion 11 functions as a "plate-shaped elastic deformation portion," and the front wall 11A bends due to the pressing reaction force received by the multiple contact protrusions 16. Also, since the multiple contact protrusions 16 also have a hollow structure, if the contact protrusions 16 are strongly pressed, the contact protrusions 16 themselves undergo compressive deformation. In this way, due to variations in the thickness of the display sheet 90, the base portion 11, including the contact protrusions 16 and the front wall 11A, is partially deformed, absorbing the variations in the thickness of the display sheet 90 and maintaining a favorable contact pressure on the display sheet 90. Furthermore, since the planar shape of the contact protrusions 16 is dome-shaped, stress concentration in the contact protrusions 16 and their surroundings is mitigated. Furthermore, since the multiple contact protrusions 16 are arranged along the outer edge of the display sheet 90, the load on the display sheet 90 is also distributed. In addition, the multiple contact protrusions 16 could be provided on the rear surface of the subframe 52, but in this embodiment they are provided on the base portion 11, so they are hidden behind the display sheet 90 and the contact protrusions 16 do not detract from the appearance.

[0059] Furthermore, in the display panel 10 of this embodiment, the above configuration forms multiple handles on the outer edge. Specifically, as shown in Figure 1, on the front outer edge of the display panel 10, the first groove 58 and the second groove 59 function as handles, and on the rear outer edge of the display panel 10, as shown in Figure 3, the embankment 55D protruding from the rear outer edge of the display panel 10 (specifically, the embankment next to the base part positioning surface 55T in Figure 4) and the fitting gap 55E between the front and rear positioning protrusions 14 of the base part 11 (fitting gap 55E between the frame 50 and the base part 11; see Figure 13) function as handles. The fitting gap formed between the inner surface of the main frame 51 and the base part 11 by the hinge connecting recess 12E functions as a handle that widens in the short-side direction. As such, the display panel 10 is equipped with these handles on its outer edge, making it easy to transport. Furthermore, the second groove 59 and the embankment 55D (fitting gap 55E), which serve as gripping parts, are positioned on the front and back of the main frame 51 so that they are directly opposite each other, allowing the user to lift the display panel 10 by placing their thumb and other fingers on the second groove 59 and the embankment 55D. Also, the first groove 58, which serves as a gripping part, is located directly behind the locking member 64, allowing the user to easily operate the locking member 64 by placing one hand (thumb or other fingers) on the first groove 58 and the other hand on the locking member 64. In addition, the first groove 58 and the second groove 59 are formed over the entire area between the ends of each long side of the display panel 10, allowing the user to lift the display panel 10 by placing both hands on the first groove 58 or the second groove 59. Furthermore, by placing one thumb and one other finger in the first groove 58 or the second groove 59 and resting the other finger against the leg portion 71, it is possible to prevent the leg portion 70 from rotating relative to the display panel 10 during transport. In addition, the fitting gap 55E, which serves as a handle, is formed by effectively utilizing the fitting gap between the frame 50 and the base portion 11, thus making effective use of the gap between the two parts. Moreover, since the base portion 11 and the frame 50, which are the main components of the display panel 10, are blow-molded products, the display panel 10 is made lighter and easier to carry. The fitting gap 55E may also be formed between the ends of each short side portion of the display panel 10 to serve as a handle. The handle may also be formed to protrude.Furthermore, the corners around the locking member mounting portion 54 (the raised portion 55D) and the corners around the locked portion 15 (the front and rear positioning abutment portion 14) are chamfered, which prevents fingers from being hit by sharp corners and becoming painful when carrying the display panel 10 or operating the locking member 64.

[0060] Furthermore, when sliding the locking member 64 from the locked position to the unlocked position, or from the unlocked position to the locked position, the locking projection 65T of the locking member 64 overcomes one of the latching grooves 54K of the frame body 50H, causing the engaging piece 65 to elastically deform and pushing the locking member 64 backward. If it is slid further in this position, the locking projection 65T of the locking member 64 engages with the other latching groove 54K of the frame body 50H, and the locking member 64 is locked in that position. However, if the bolt B1 and nut N1 supporting the locking member 64 are tightened too much, the locking member 64 may be pressed against the locking member mounting portion 54, making it difficult to slide the locking member 64. In contrast, in the display panel 10 of this embodiment, a collar 63 is fitted to the bolt B1 supporting the locking member 64 such that a gap S1 is formed between the washer W1 and the sliding projection 64T of the locking member 64. This prevents the bolt B1 and nut N1 from being tightened, and stabilizes the operability of the locking member 64.

[0061] Furthermore, during the sliding motion of the locking member 64, the engaging piece 65 may push the locking member 64 upward toward the washer W1 and cause it to come into contact with the washer W1. However, since the locking member 64 is provided with a sliding projection 64T, and this sliding projection 64T comes into sliding contact with the washer W1, the friction is reduced compared to the case where the surface of the locking member 64 and the washer W1 are in surface contact, resulting in smoother sliding operation of the locking member 64.

[0062] [Other embodiments] In the above embodiment, a hinge structure of two parts, the leg portion 71 and the base portion body 11H, was illustrated. However, the double-wall hinge structure described above can be applied to any hinge structure between parts, as long as one of the parts has a hollow structure.

[0063] In the double-wall hinge structure of the above embodiment, as shown in Figure 11, the wall through which the hinge bolt B2 passes is provided with a rear first curved portion 22 and a front first curved portion 26, and a pair of rear second curved portions 23 and front second curved portions 27 arranged on both sides thereof. However, a structure provided only with the rear first curved portion 22 and the front first curved portion 26, or a structure provided with the rear first curved portion 22 and the front first curved portion 26, and a rear second curved portion 23 and a front second curved portion 27 on only one side thereof, is also possible.

[0064] In the above embodiment, a hinge bolt B2 was provided as the hinge shaft member, but it is not limited to this, and other types such as rivets or shaft pins may also be used.

[0065] In the above embodiment, the display panel 10 is separated into a frame 50 and a base portion 11, with the display sheet 90 sandwiched between the subframe 52 of the frame 50 and the base portion 11. However, the various structures of the above embodiment may also be applied to a display panel 10 that is not separated into a frame 50 and a base portion 11, and has an insertion opening for inserting the display sheet 90 between the subframe 52 and the base portion 11 on the front or side of the display panel 10. Furthermore, the main frame 51 only needs to surround the display sheet 90 from at least three sides: below, both sides, or above and below, and one side.

[0066] In the above embodiment, the frame 50 and the base portion 11 were blow-molded and had a double-wall structure, but one or both may be constructed by welding two plates together, or they may be a single-piece structure. Also, one or both of the frame 50 and the base portion 11 may be injection-molded instead of blow-molded.

[0067] In the above embodiment, the locking member 64 was slidably supported by a bolt B1, but as shown in Figures 14A and B, the frame 50 may also be provided with a rail R1 that sandwiches the locking member 64.

[0068] In the above embodiment, the locking member 64 was configured to slide, but it may also be configured to be supported at a single point and rotate. In this case, it is preferable to make the slide engagement projection 66 and the slide engagement groove 54M arc-shaped so that the slide engagement projection 66 rotates within the slide engagement groove 54M.

[0069] In the above embodiment, the locking member 64 was attached to the frame 50, but it may also be attached to the base portion 11, and the frame 50 may have a hood portion that receives the locking member 64 and faces it from the rear. Alternatively, a separate locking component may be attached to the frame and base portion while the base portion is housed in the frame.

[0070] In the above embodiment, the bolt B1 is inserted through the locking member 64 from the front and the head portion H1 is fitted into the counterbore portion 58Z. However, the bolt B1 may be inserted from the rear and the nut N1 may be fitted into the counterbore portion 58Z. Furthermore, the counterbore portion 58Z may not be formed at all.

[0071] In the above embodiment, the collar 63 was fitted onto the bolt B1, but as shown in Figure 15, the spacer may be integrated with the bolt.

[0072] In the above embodiment, the locking member 64 has a slide engagement projection 66 and the frame body 51 has a slide engagement groove 54M, but the order may be reversed. Alternatively, instead of the slide engagement projection 66, a cylindrical or other projection 66T may move within the slide engagement groove 54M (see Figure 16A), or a pair of projections 64Y may be provided to sandwich the slide engagement projection 66 (see Figure 16B).

[0073] In the above embodiment, the bulge 64N was located at the rear end of the groove 64M, but it may also be located at the front end, or it may be located in the middle of the groove 64M in the longitudinal direction.

[0074] In the above embodiment, the base portion 11 was provided with a fitting portion 11K that was housed inside the main frame 51, but the entire front surface of the base portion 11 may be flush with the front surface of the front-rear positioning abutment portion 14.

[0075] In the above embodiment, the gap between the apex of the contact projection 16 and the rear surface of the subframe 52 of the base portion 11 was slightly smaller than the thickness of the display sheet 90, but it may be the same as the thickness of the display sheet 90, or slightly larger than the thickness of the display sheet 90. Also, the configuration may be such that the contact projection 16 abuts against the rear surface of the subframe 52 of the base portion 11 when the display sheet 90 is not housed therein.

[0076] <Note> The following describes the features extracted from the above embodiment, explaining their effects and other aspects as needed. For ease of understanding, corresponding configurations in the above embodiment will be indicated in parentheses as appropriate, but these features are not limited to the specific configurations indicated in parentheses.

[0077] [First group of features] In the hinge structure of Japanese Patent Publication No. 2021-092608 (paragraph

[0019] , Figures 2 and 10), the durability of the part of the hollow structure component that supports the hinge shaft member can be a problem, and the following first group of features can be listed as technologies to solve this problem.

[0078] [Feature 1] A display panel (10) having a hollow panel body (10H) to which legs (71) are rotatably connected, and which can be raised to stand upright relative to the panel body (10H) by opening the legs (71), wherein the rear wall (11B) and front wall (11A) of the panel body (10H) are formed, and the flat cross-sectional shape is corrugated and faces each other, and the rear wall corrugated portion (20) and front wall corrugated portion (24) are included in the outwardly protruding peaks of the rear wall corrugated portion (20) The display panel (10) comprises: a pair of rear wall peaks (21) facing each other across the upper part of the leg portion (71); a pair of front wall peaks (25) included in a plurality of inwardly protruding peaks of the front wall corrugated portion (24) and received inside the pair of rear wall peaks (21); and a hinge shaft member (B2) that penetrates both the pair of rear wall peaks (21) and the pair of front wall peaks (25) and rotatably connects the leg portion (71) to the panel body (10H).

[0079] In the display panel of Feature 1, the rear and front walls of the panel body, which is a hollow structural component, have corrugated sections formed on the rear wall and front wall. A pair of inwardly projecting peaks of the front wall corrugated section are received inside a pair of outwardly projecting peaks of the rear wall corrugated section. The upper part of the leg is positioned between the pair of rear wall peaks, and a hinge shaft member passes through the pair of rear wall peaks, the pair of front wall peaks, and the upper part of the leg. Thus, in the display panel of Feature 1, the part of the panel body, which is a hollow structural component, that supports the hinge shaft member has a double-wall structure where the front wall and rear wall overlap, thus improving durability.

[0080] In this disclosure, "waveform" refers to any shape as long as the sum of the number of peaks and troughs is three or more. Specifically, it may be a square wave, trapezoidal wave, triangular wave, sine wave, etc., or any other, and the wavelength, waveform, and wave height do not necessarily have to be constant. Furthermore, the peaks of the rear wall waveform may or may not protrude from the outer surface of the panel body.

[0081] [Feature 2] The display panel (10) according to Feature 1, wherein the top of at least one peak of the front wall corrugated portion (24) is connected to the back side portion of the top of the peak of the rear wall corrugated portion (20), or the middle portion of at least one peak of the front wall corrugated portion (24) is connected to the back side portion of the middle portion of the rear wall corrugated portion (20).

[0082] According to the structure of Feature 2, the front corrugated section and the rear corrugated section are connected at least partially, thereby increasing the strength of the part of the panel body that supports the hinge shaft member. The front corrugated section and the rear corrugated section may be connected at the peaks and mid-sections of their respective peaks, or the entire front corrugated section and the entire rear corrugated section may be connected in a double layer.

[0083] [Feature 3] The panel body (10H) includes a base portion (11) which is a plate-shaped blow-molded product, and a frame (50) which is a frame-shaped blow-molded product that fits to the outside of the base portion (11) and has a front support portion that overlaps the front outer edge of the base portion (11), and the display panel (10) according to feature 1 or feature 2, wherein a display sheet (90) with letters or a design is supported by being sandwiched between the base portion (11) and the front support portion.

[0084] The display panel of this disclosure may hold a display sheet with characters or patterns attached, as in the configuration of Feature 3, or it may not hold a display sheet and have characters or patterns directly attached, or it may have a light-emitting element such as a light-emitting element or liquid crystal attached. Furthermore, in a display panel that holds a display sheet, as in the configuration of Feature 3, the display sheet may be sandwiched between two parts, a frame and a base part fitted inside it, or it may have a structure in which the display sheet can be slid into the outer edge of one part.

[0085] [Feature 4] The rear wall waveform portion (20) and the front wall waveform portion (24) are the display panel (10) described in Feature 3, which is provided on the base portion (11).

[0086] The aforementioned corrugated rear wall section and corrugated front wall section may be provided on the base section as described in Feature 4, or they may be provided on the frame. Furthermore, since the base section can be wider than the frame, providing the corrugated rear wall section and corrugated front wall section on the base section allows for increased size and strength. Additionally, the corrugated rear wall section and corrugated front wall section can be used to reinforce the rear and front walls of the base section.

[0087] [Feature 5] A display panel (10) is formed in which a leg portion (71) is rotatably connected to a hollow panel body (10H), and the leg portion (71) can be opened relative to the panel body (10H) to stand upright, wherein the rear wall (11B) of the panel body (10H) has a rear first curved portion (22) formed thereon which is curved to protrude inward and whose outer surface has an external vertical groove (22M) that receives the upper part of the leg portion (71), and the panel The front wall (11A) of the main body (10H) has a front first curved portion (26) formed thereon, which is curved to protrude outward and whose inner surface has an internal vertical groove (26M) that receives the rear first curved portion (22). The display panel (10) has a hinge shaft member (B2) that passes through both the rear first curved portion (22) and the front first curved portion (26) and rotatably connects the leg portion (71) to the panel body (10H).

[0088] In the configuration of Feature 5, similar to the configuration of Feature 1, the part of the panel body, which is a hollow structural component, that supports the hinge shaft member has a double-wall structure in which the front wall and rear wall overlap, thus improving durability.

[0089] [Feature 6] The display panel (10) according to feature 5, wherein the rear wall (11B) of the panel body (10H) has a rear second curved portion (23) formed thereon, which is curved to protrude outward and shares one side with the rear first curved portion (22), and the front wall (11A) of the panel body (10H) has a front second curved portion (27) formed thereon, which is curved to protrude inward and shares one side with the front first curved portion (26), and is received inside the rear second curved portion (23), and the hinge shaft member (B2) penetrates the rear second curved portion (23) and the front second curved portion (27).

[0090] In the configuration of Feature 6, similar to the configuration of Feature 1, the part of the panel body, which is a hollow structural component, that supports the hinge shaft member has a double-wall structure in which the front wall and rear wall overlap, thus improving durability.

[0091] [Feature 7] A hinge structure in which a second part (70, 71) is rotatably connected to a first part (10H, 11H) of a hollow structure, wherein the first wall (11B) and the second wall (11A) of the first part (10H, 11H) facing each other across an internal space are formed first wall corrugated portion (20) and second wall corrugated portion (24) which have a corrugated shape in the plane and face each other, and the second part (70, 71) is included in a plurality of outwardly protruding peaks of the first wall corrugated portion (20) A hinge structure comprising: a pair of first wall peaks (21) facing each other with a part of the second wall corrugated portion (24) in between; a pair of second wall peaks (25) included in a plurality of inwardly protruding peaks of the second wall corrugated portion (24) and received inside the pair of first wall peaks (21); and a hinge shaft member (B2) that penetrates both the pair of first wall peaks (21) and the pair of second wall peaks (25) and rotatably connects the second parts (70, 71) to the first parts (10H, 11H).

[0092] In the configuration of Feature 7, similar to the configuration of Feature 1, the part of the first component, which is a hollow structural component, that supports the hinge shaft member has a double-wall structure in which the first wall and the second wall overlap, thus improving durability.

[0093] [Second group of features] In the display panel described in Japanese Utility Model Publication No. 56-003574 (Figures 1 and 2), it is conceivable that when a thick display sheet is accommodated, the rear surface of the base portion will protrude beyond the rear surface of the frame, preventing the holding mechanism from securing the base portion. Therefore, the following second set of features can be described as technologies to accommodate multiple types of display sheets with different thicknesses.

[0094] [Feature 1] A base portion (11) is superimposed on the rear of a display sheet (90) on which text or a design is attached to the front, A frame (50) that houses the base portion (11) together with the display sheet (90) and supports the front outer edge of the display sheet (90) from the front, A display panel (10) comprising a holding mechanism (64) for holding the base portion (11) in a state where it is housed in the frame (50), A display panel (10) comprising a position-determining contact portion (55T, 14) provided on the outer portion of the frame (50) that houses the display sheet (90) and the base portion (11), which abut each other in the front-rear direction and determine the forward position of the base portion (11) relative to the frame (50).

[0095] In the display panel of Feature 1, when the base is housed in the frame, the positional contact points of the base and base contact the outside of the housing section where the display sheet is housed, ensuring the thickness of the housing section is maintained. In other words, regardless of the thickness of the display sheet, the forward position of the base relative to the frame remains constant, and the holding mechanism can stably hold the base, making it possible to accommodate multiple types of display sheets with different thicknesses.

[0096] [Feature 2] The display panel (10) according to Feature 1 includes a locking member (64) that is slidably or rotatably supported on the rear surface of the frame (50) and displaces between a locked position that overlaps with the base portion (11) in the front-rear direction and restricts the rearward movement of the base portion (11), and an unlocked position that does not overlap with the base portion (11) in the front-rear direction and allows the rearward movement of the base portion (11).

[0097] As shown in Feature 2, by applying Feature 1 to a display panel configured in which a locking member supported on the rear surface of the frame slides or rotates to a position where it overlaps with the base, it becomes possible to smoothly slide or rotate the locking member regardless of the thickness of the display sheet. In other words, by using the configuration of Feature 2 for the holding mechanism, the effects of Feature 1 can be enjoyed to the fullest extent.

[0098] [Feature 3] The display panel (10) according to feature 2 is provided on the frame (50) with a locking member protection portion (51X) that faces the locking member (64) and whose rear surface is located behind the locking member (64).

[0099] In the display panel of Feature 3, a lock member protection part is provided behind the lock member, sandwiching the lock member. Therefore, when the display panel is placed with its rear face down, the lock member is less likely to come into contact with the floor or ground, thus preventing damage to the lock member.

[0100] [Feature 4] The base portion (11) is provided with a fitting portion (11K) that is housed within the housing portion. The position-fixing contact portion (14) of the base portion (11) protrudes laterally from the fitting portion (11K) behind the fitting portion (11K), The display panel (10) according to any one of features 1 to 3, wherein the position-fixing contact portion (55T) of the frame (50) is part of the peripheral edge of the housing portion on the rear surface of the frame (50).

[0101] In the display panel of Feature 4, the fitting portion, which is part of the base, is housed together with the display sheet within the housing, thus preventing the display sheet from getting caught between the positioning contact portions.

[0102] [Feature 5] The display panel (10) according to feature 4, wherein the frame (50) is provided with a projection (51X) that faces the base portion (11) and protrudes rearward from the position-fixing contact portion (55T) of the frame (50).

[0103] According to the display panel of Feature 5, the height difference between the rear end of the frame and the rear end of the base can be reduced compared to when the entire rear surface of the frame is aligned with the positioning contact area. This makes it possible to stabilize the display panel when it is mounted with its rear side facing downwards.

[0104] [Third group of characteristics] The display panel described in Japanese Utility Model Publication No. 56-003574 (Figures 4 and 5) is configured such that the base is attached and detached by elastically deforming the locking member to a position where it does not overlap with the base. This required operating the base while holding the locking member in the elastically deformed state. Therefore, the following third group of features can be listed as technologies to facilitate the attachment and detachment of the base.

[0105] [Feature 1] A base portion (11) is superimposed on the rear of a display sheet (90) on which text or a design is attached to the front, A frame (50) that houses the base portion (11) together with the display sheet (90) and supports the front outer edge of the display sheet (90) from the front, In a display panel (10), a locking member (64) is supported so as to be slidable or rotatable by being superimposed on a locking member support portion (54) provided on the rear surface of either the base portion (11) or the frame (50), and moves between a locked position that restricts the rearward movement of the base portion (11) relative to the frame (50) and an unlocked position that releases the restriction, A rearward protruding member (B1, W1, N1) is attached to either the base portion (11) or the frame (50) and protrudes rearward from the lock member support portion (54), A rear support portion (W1, N1) is provided on the rear protruding member (B1) and receives at least a part of the locking member (64) between itself and the locking member support portion (54), and cooperates with the locking member support portion (54) and the rear protruding member (B1) to support the locking member (64) so ​​that it can slide or rotate, A spacer (63) that abuts against the lock member support portion (54) and the rear support portion (W1, N1), A display panel (10) equipped with the following.

[0106] The conventional display panel described above is configured to attach and detach the base by elastically deforming the locking member to a position where it does not overlap with the base. However, in this case, it is necessary to operate the base while holding the locking member in an elastically deformed state.

[0107] In contrast, with the display panel of Feature 1, moving the locking member to the unlocked position allows the user to release their hand from the locking member and operate the base unit, thus making it easier to attach and detach the base unit from the frame.

[0108] Furthermore, when attaching the rear protruding member to either the base or the frame, if the distance between the lock member support and the rear support is made smaller than the specified value, there is a concern that the lock member will be pressed against the lock member support and become difficult to move. However, in the display panel of Feature 1, a spacer is provided between the lock member support and the rear support, so that the distance between the lock member support and the rear support can be kept constant, and the operability of the lock member can be stabilized.

[0109] [Feature 2] A bolt (B1) is provided which is passed through a mounting hole (54L) formed in either the base portion (11) or the frame (50) and screwed onto a nut (N1). The shaft portion of the bolt (B1) forms the rearward protruding member (B1), The rear support portion (W1, N1) includes the head (H1) of the bolt (B1) or the nut (N1). The display panel (10) according to Feature 1, wherein the spacer (63) is cylindrical and fitted onto the shaft portion of the bolt (B1).

[0110] The rearward protruding member may be constructed from a rail that clamps the locking member in a direction perpendicular to the direction of movement, or it may be constructed from a bolt as in Feature 2. Furthermore, as in Feature 2, by making the spacer a separate component from the bolt and fitting it onto the shaft of the bolt, it becomes possible to use commercially available bolts.

[0111] [Feature 3] Either the base portion (11) or the frame (50) is a blow-molded product and includes a connecting portion in which a part of the front wall (51A) is recessed rearward and connected to the rear wall (51B). The display panel (10) according to feature 2, wherein the connecting portion has a mounting hole (54L) through which the bolt passes, and a holding portion (58Z) for holding the nut (N1) or the head (H1) of the bolt (B1).

[0112] In the display panel of Feature 3, the mounting holes and retaining parts through which the bolts are passed are formed in the connecting section, which is thicker than the front wall or the rear wall alone, thus increasing the strength of the mounting holes and retaining parts.

[0113] [Feature 4] The display panel (10) according to any one of features 1 to 3, wherein the locking member (64) and the locking member support portion (54) are provided with guide portions (66, 54M) that engage with each other in a slidable or rotatable manner.

[0114] In the display panel of Feature 4, the guide section reduces lateral rattle (in the direction intersecting the direction of movement) of the locking member.

[0115] [Feature 5] The display panel (10) according to feature 4, wherein a clearance (S1) smaller than the engagement depth of the grooves of the guide portion (66, 54M) is provided between the lock member support portion (54) and the rear support portion (W1, N1) and a part of the lock member (64) that is received between them.

[0116] According to the display panel for Feature 5, regardless of the position of the locking member between the locking member support and the rear support, the guide parts engage with each other in a grooved manner, reducing lateral rattle of the locking member.

[0117] [Feature 6] The display panel (10) according to any one of features 1 to 5, wherein the locking member (64) has a projection (64T) on the surface facing the rear support portion (W1, N1) that can rub against the rear support portion (W1, N1).

[0118] In the display panel of Feature 6, a projection is provided on the surface of the locking member facing the rear support portion, which is capable of sliding against the rear support portion. This reduces friction compared to when the surface of the locking member facing the rear support portion and the rear support portion are in surface contact, resulting in smoother operation of the locking member.

[0119] [Feature 7] The locking member (64) includes: The main plate portion (64A) is superimposed on the lock member support portion (54), The main plate portion (64A) has an elongated hole (64L) formed therein, through which the shaft portion of the bolt (B1) passes while allowing it to slide, The main plate portion (64A) is provided with a pair of opposing walls (64C) that protrude rearward from the main plate portion (64A), extend parallel to the elongated hole (64L), and are located on both sides of the elongated hole (64L) to receive the nut (N1), The nut (N1) has a structure that can engage with a tool, The display panel (10) according to feature 2 or 3, wherein a tool receiving portion (64N) capable of receiving a tool is formed by bulging laterally out of a part of the pair of opposing walls (64C).

[0120] According to the display panel for Feature 7, the tool receiving section makes it easier to tighten nuts.

[0121] [Fourth characteristic group] The display panel described in Japanese Utility Model Publication No. 56-003574 (Figures 1, 2, and 5) required a firm grip to prevent the hand holding the edge of the display panel from slipping and dropping it during transport, making transport difficult. The following fourth group of features can be cited as technologies to solve this problem.

[0122] [Feature 1] A display panel (10) that holds a display sheet (90) bearing characters or a design in a visible state, comprising: a surrounding portion (51) that surrounds a display sheet (90) from at least three sides, including below and both sides; and a front support portion (52) and a rear support portion (11) that are applied to the outer edge of the display sheet (90) from the front and rear sides, respectively, wherein the display panel (10) is provided with handle portions (55D, 55E, 58, 59) that are recessed or protruding from the front or rear surface of the outer portion of the surrounding portion (51) and can be gripped.

[0123] In the display panel of Feature 1, a handle is provided on the surrounding portion that encloses the display sheet, allowing the user to grip it and thus easily transport the display panel.

[0124] [Feature 2] The handgrip portions (55D, 55E, 58, 59) are formed on both the front and rear surfaces of the enclosing portion (51) and are the display panel (10) as described in Feature 1.

[0125] In the display panel of Feature 2, the thumb and other fingers can be placed on the recessed grips formed on both the front and rear surfaces of the enveloping part to lift the display panel.

[0126] [Feature 3] A display panel (10) according to feature 1 or 2, comprising a base portion (11) which is a plate-shaped blow-molded product and is the rear support portion (11), and a frame (50) which is a frame-shaped blow-molded product that fits to the outside of the base portion (11) and has the surrounding portion (51) and the front support portion (52) integrally molded.

[0127] Since the base and frame, which are the main components of the display panel in Feature 3, are blow-molded products, the display panel is lighter and easier to carry.

[0128] [Feature 4] The display panel (10) according to feature 3, comprising a recessed portion (12E) formed by recessing a part of one of the mating surfaces of the frame (50) and the base portion (11), and a groove-shaped handle portion (55E) sandwiched between the recessed portion and the other mating surface and opening to the rear.

[0129] In the display panel of Feature 4, the gap in the fitting between the frame and the base can be used as a handle. Regarding Feature 2, a part of the surrounding area may be a recessed or indented area, and a hand can be placed in that recessed or indented area.

[0130] [Feature 5] The display panel (10) according to feature 3 or 4, wherein the display panel (10) is provided with a plurality of locking members (64) that are slidably attached to the rear surface of the surrounding portion (51) and movable between a locked position that overlaps the rear outer edge of the base portion (11) to prevent the base portion (11) from coming off and an unlocked position that releases the locking, and the handle portion (58) is arranged at multiple positions on the front surface of the surrounding portion (51) that are directly behind the plurality of locking members (64), and has a groove shape that extends along each side of the surrounding portion (51).

[0131] In the display panel of Feature 5, the user can easily operate the locking member by placing one of their fingers (the thumb or the other fingers) on the handle while placing the other finger against the locking member.

[0132] [Feature 6] The display panel (10) is a rectangle that is longer in one direction (vertical or horizontal), and the handle portion (55D, 55E, 58, 59) is formed over the entire area between the ends of each of the longer sides, as described in any one of features 1 to 5.

[0133] The display panel in Feature 6 has handles formed along the entire length between the ends of each long side, allowing the user to lift the display panel by placing both hands on the handles.

[0134] [Feature 7] The aforementioned handles (58, 59) are provided on the front surfaces of both sides of the display panel (10). A display panel (10) according to any one of features 1 to 6, wherein the legs (71) of a leg body (70) formed by connecting a plurality of vertically elongated legs (71) with a horizontally elongated beam (72) are hinged to the rear surface of a display panel (10), and two of the legs (71) included in the plurality of legs (71) are positioned near both sides of the display panel (10).

[0135] According to the structure of Feature 7, by placing one thumb and the other fingers on the handle and holding down the legs with the other fingers, it is possible to prevent the legs from rotating relative to the display panel during transport.

[0136] [Fifth characteristic group] The display panel described in Japanese Utility Model Publication No. 56-003574 (Figures 1, 2, and 5) had difficulty accommodating variations in the thickness of the display sheet. The following fifth set of features can be cited as technologies to solve this problem.

[0137] [Feature 1] A display panel (10) that holds a display sheet (90) on which characters or a design is attached in a visible state by sandwiching the outer edge of the sheet (90) between a front support portion (52) and a rear support portion (11), the display panel (10) comprising a contact projection (16) that protrudes from either the front support portion (52) or the rear support portion (11) and is pressed against the display sheet (90).

[0138] [Feature 2] The display panel (10) according to Feature 1, wherein the front support portion (52) or the rear support portion (11) having the abutment projection (16) is provided with a plate-shaped elastic deformation portion (11A) around the abutment projection (16) that undergoes bending elastic deformation due to the abutment reaction force received by the abutment projection (16).

[0139] [Feature 3] The display panel (10) according to feature 1 or 2, wherein the contact projection (16) has a hollow structure that can be compressed and deformed.

[0140] [Feature 4] The front support portion (52) or the rear support portion (11) is part of a blow-molded part and has a hollow structure, and is a display panel (10) according to any one of the features 1 to 3.

[0141] [Feature 5] The display panel (10) according to any one of features 1 to 4, wherein the abutment projection (16) is provided on the rear support portion (11) in a plurality, arranged along the outer edge of the display sheet (90).

[0142] [Feature 6] The abutment projection (16) is a display panel (10) according to any one of features 1 to 5, wherein the planar shape is a circular or elliptical dome shape.

[0143] [Feature 7] A display panel (10) according to any one of the features 1 to 6, comprising: a plate-shaped blow-molded product which is the rear support portion (11) on which the display sheet (90) is superimposed over substantially the entire front surface; and a frame-shaped blow-molded product which houses the base portion (11) together with the display sheet (90) and has a frame (50) on which the front support portion (52) is integrally molded, wherein the contact protrusions (16) are formed in multiple locations on the front surface of the base portion (11), and the rear surface of the base portion (11) has multiple fitting recesses (17) formed thereon, into which the multiple contact protrusions (16) of the rear base portion (11) fit when the base portions (11) are superimposed on each other.

[0144] The display panel of Feature 1 is equipped with a contact projection on either the front support portion or the rear support portion that sandwiches the outer edge of the display sheet from both sides, allowing for partial deformation of either the front support portion or the rear support portion. In other words, compared to conventional displays that require the entire front support portion or rear support portion to be deformed to absorb variations in the thickness of the display sheet, the display panel of Feature 1 can easily absorb variations in the thickness of the display sheet and can easily accommodate display sheets of various thicknesses.

[0145] As for the partial deformation of either the front support or the rear support, the front support or rear support having the contact protrusion may become a plate-shaped elastic deformation part that undergoes bending elastic deformation (Feature 2), or the contact protrusion may have a hollow structure and be configured to be compressible (Feature 3). Furthermore, if the front support or rear support having the contact protrusion is part of a blow-molded part and has a hollow structure, partial deformation of them becomes easier (Feature 4). In addition, the contact protrusion may have any shape, but if the planar shape of the contact protrusion is a circular or elliptical dome shape (Feature 6), stress concentration in the contact protrusion and its surroundings is alleviated. Furthermore, the contact protrusion may be unevenly distributed in some parts of the outer edge of the display sheet, for example, only at the top and bottom or only on both sides, but it is preferable that it be arranged along the outer edge of the display sheet (Feature 5), which would distribute the load on the display sheet. Furthermore, it is preferable to provide it on the rear support portion (feature 5), so that the contact protrusion is hidden by the display sheet and does not detract from the appearance.

[0146] While this specification and drawings disclose specific examples of the technology included in the claims, the technology described in the claims is not limited to these specific examples, but also includes various modifications and changes to these examples, as well as parts of the examples taken individually. [Explanation of Symbols]

[0147] 10 Display Panel 10H Panel Body (Part 1) 11. Base section (rear support section) 11A Front wall (second wall, plate-like elastic deformation section) 11B Back wall (1st wall) 11H Base Unit (First Component) 12E Hinge connection recess (recessed area) 12G support hole 14 Front-back positioning part (positioning abutment part) 16 Contact protrusion 17 Fitting recess 20 Rear wall corrugated part (first wall corrugated part) 21 Rear wall crest (first wall crest) 22 Rear first curved section 22M External longitudinal groove 23 Rear second curved section 24 Front wall corrugated part (second wall corrugated part) 25 Front wall crest (second wall crest) 26 Front first curved section 26M internal longitudinal groove 27 Front second curved section 50 frames 51 Mainframe (encircling section) 52 Subframe (front support section) 55D Embankment section (handrail section) 55E Fitting gap (handle area, recessed area) 55T Base positioning surface (positioning contact area) 58. First groove (handle section) 59 Second groove (handle section) 63 Colors (Spacers) 64 Locking member (holding mechanism) 64T Sliding groove (protrusion) 70 Leg Body (Part 2) 71 Leg section (second part) 72 Beam section 90 Display Sheets B1 Bolt (rear protruding member) B2 Hinge bolt (hinge shaft member)

Claims

1. A display panel that holds a display sheet with characters or a design attached to it in a visible state by sandwiching the outer edge of the sheet from the front and rear between a front support and a rear support, A display panel comprising a contact projection that protrudes from either the front support portion or the rear support portion and is pressed against the display sheet.

2. The display panel according to claim 1, wherein the front support portion or the rear support portion having the abutment projection is provided with a plate-shaped elastic deformation portion that undergoes bending elastic deformation due to the abutment reaction force received by the abutment projection.

3. The display panel according to claim 1, wherein the contact projection has a hollow structure that can be compressed and deformed.

4. The display panel according to any one of claims 1 to 3, wherein the front support portion or the rear support portion is part of a blow-molded part and has a hollow structure.

5. The display panel according to claim 1, wherein a plurality of the contact protrusions are provided on the rear support portion so as to be aligned along the outer edge of the display sheet.

6. The display panel according to claim 1, wherein the contact projection has a planar shape that is a circular or elliptical dome shape.

7. A plate-shaped blow-molded product, which is the rear support portion and has a base portion on which the display sheet is superimposed over substantially the entire front surface, It is a frame-shaped blow-molded product that houses the base portion together with the display sheet, and comprises a frame from which the front support portion is integrally molded, Multiple contact protrusions are formed on the front surface of the base portion. The display panel according to claim 1, wherein the rear surface of the base portion is formed with a plurality of fitting recesses into which a plurality of contact protrusions of the rear base portion fit when the base portions are stacked together.

Images