JP6193057B2 - Display board for portable electronic devices - Google Patents

Description

  The present invention relates to a display panel for a portable electronic device.

  Mobile electronic devices represented by mobile phones, smartphones, tablet PCs and the like have a display area for displaying information such as characters and images, and a display plate made of transparent glass or resin is provided on the outer surface of the display area. Prepare. Recently, devices such as smartphones and tablet PCs that display areas are not just parts that display information but also serve as operation units are increasing, and accordingly, display areas are becoming larger. . The display board is fixed to the casing of the portable electronic device by a method such as fitting or bonding. There is always a gap between the display panel and the casing regardless of the width. For this reason, when providing high waterproofness or dustproofness to portable electronic devices, a method of attaching a rubber frame around the display board is known to completely fill this gap (for example, patents) Reference 1).

  Further, when the display panel is made of glass in particular, there is a risk that the display panel may be damaged by vibration or impact applied to the display panel during the manufacturing process or during use of the portable electronic device. Therefore, in order to improve impact resistance in addition to waterproofness and dustproofness, instead of the above-described method of placing a rubber frame on the outer periphery of a glass display board, the display board is set in a mold. And the method of insert-molding a cyclic | annular rubber-like elastic body on all the side surfaces of a display board is also known (for example, refer patent document 2).

Japanese Patent Laid-Open No. 10-207630 International Publication WO2012 / 115140

  However, when a rubber frame is placed on the outer periphery of the display board, it is difficult to improve the adhesion between the display board and the frame, and the frame needs to be molded with high accuracy separately from the display board. There is. On the other hand, when an annular rubber-like elastic body is fixed to all side surfaces of the display board, it is necessary to accurately position the display board in the mold. Since the display panel tends to be thinner or more designable, local unevenness is provided on the front or back surface of the display board, and the display panel is fixed in an accurate position so that it does not move in the mold. It is not possible to adopt such a method.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to easily obtain a display panel for a portable electronic device having high impact resistance.

  A display panel for a portable electronic device according to an embodiment for achieving the above object is a display plate for a portable electronic device, and is a transparent substrate and a rubber-like material partially covering the outer surface of the substrate And an elastic body.

  In a display panel for a portable electronic device according to another embodiment, a rubber-like elastic body covers an outer surface of a corner portion of the substrate and an outer surface having a predetermined length including the outer surface.

  The display panel for a portable electronic device according to another embodiment is such that the rubber-like elastic body is other than the outer surface of each corner of the substrate and the outer surface of a predetermined length including the outer surface, and is outside of at least one side of the substrate. The side is covered.

  The display panel for a portable electronic device according to another embodiment is formed continuously so that the rubber-like elastic body wraps around from the outer surface of the substrate to the outer edge portion of the front surface or back surface of the substrate.

  The display panel for a portable electronic device according to another embodiment is also configured such that the rubber-like elastic body is formed on the front surface or back surface of at least one side of the substrate from the outer surface of the corner portion of the substrate and the outer surface of a predetermined length including the rubber elastic body. It is continuously formed so as to go around the outer edge.

  The display panel for a portable electronic device according to another embodiment is also continuously formed so that the rubber-like elastic body wraps around from the outer surface of at least one side of the substrate to the front surface of the corner of the substrate or the outer edge of the back surface. Is.

  A display panel for a portable electronic device according to another embodiment is such that the corners of the outer surface of the substrate are removed, or irregularities are formed on the outer surface, and a rubber-like elastic body is attached thereto.

  A display panel for a portable electronic device according to another embodiment is formed by directly attaching a rubber-like elastic body to a substrate.

  A display panel for a portable electronic device according to another embodiment is such that the substrate is a glass substrate and the rubber-like elastic body is an elastic body made of silicone rubber.

  In the portable electronic device display board according to another embodiment, the substrate is curved so as to protrude in one direction within the surface.

  ADVANTAGE OF THE INVENTION According to this invention, the display board for portable electronic devices which has high impact resistance can be obtained simply.

FIG. 1 is a partially exploded perspective view of a portable electronic device including a portable electronic device display panel according to a first embodiment. FIG. 2 is a plan view of the display panel for the portable electronic device in FIG. 3 shows an AA line cross-sectional view and a part B enlarged cross-sectional view of the portable electronic device display panel of FIG. FIG. 4 shows a modification (4A, 4B, 4C) of the boundary portion between the substrate and the rubber-like elastic body viewed from the same viewpoint as the enlarged sectional view of FIG. FIG. 5 is a perspective view of a modified example of the display panel for the portable electronic device shown in FIG. 6 shows a cross-sectional view taken along the line CC of FIG. FIG. 7 is a plan view of a display panel for a portable electronic device according to the second embodiment. FIG. 8 is a plan view of a display panel for a portable electronic device according to the third embodiment. FIG. 9 is a side view of the display panel for the portable electronic device of FIG. 8 as viewed from the short side direction. FIG. 10 is an enlarged cross-sectional view taken along the line DD of the display panel for the portable electronic device of FIG. FIG. 11 is a perspective view of a modified example of the display panel for the portable electronic device shown in FIG. FIG. 12 is a plan view of a display panel for a portable electronic device according to the fourth embodiment. FIG. 13: shows the top view of the display board for portable electronic devices which concerns on 5th Embodiment.

  Embodiments of a display panel for a portable electronic device according to the present invention will be described below with reference to the drawings.

<First Embodiment>
FIG. 1 is a partially exploded perspective view of a portable electronic device including a portable electronic device display panel according to a first embodiment. FIG. 2 is a plan view of the display panel for the portable electronic device in FIG.

  The portable electronic device 1 includes a housing 2 and a display panel 3 for a portable electronic device disposed in the opening 10 on the main operation surface side of the housing 2. In the vicinity of the opening, the opening 10 has an inner frame 11 formed in an annular shape for mounting a portable electronic device display board (hereinafter, also simply referred to as “display board”) 3, and an opening from the inner frame 11. And an inner surface 12 rising toward the side. The display panel 3 is fixed to the opening 10 so that the outer edge portion of the back surface is in contact with the inner frame 11 and the outer surface thereof is in contact with the inner surface 12.

  The display panel 3 includes a transparent substantially rectangular substrate 4 and a rubber-like elastic body 5 that partially covers the outer surface of the substrate 4. The substrate 4 includes four corners 20, an outer surface 21 on the short side facing each other, and an outer surface 22 on the long side facing each other. The rubber-like elastic body 5 is divided into four so as to cover the outer surface of the corner 20 of the substrate 4 and the outer surface of a predetermined length including the outer surface (hereinafter also referred to as “the vicinity of the outer surface of the corner 20”). Separate and adhere to the substrate 4. For this reason, the display panel 3 covers only the vicinity of the corner 20 on the outer surfaces 21 and 22 of the substrate 4 with the rubber-like elastic body 5 and exposes other portions on the outer surfaces 21 and 22. When the display plate 3 is fitted into the opening 10 of the housing 2, the rubber-like elastic body 5 comes into contact with the inner side surface 12 in the vicinity of the corner portion 20 of the display plate 3. Here, the outer surface of the corner portion 20 covered with the rubber-like elastic body 5 and the outer surface of a predetermined length including the corner portion 20 may have any length as long as a part of the side of the substrate 4 is exposed. However, the length is preferably 2 to 50%, more preferably 5 to 30%, and particularly preferably 10 to 20% of the length of the short side.

  In this embodiment, the substrate 4 is made of glass, and is a thin plate having a short side of 40 to 60 mm, a long side of 90 to 130 mm, and a thickness of 0.3 to 0.7 mm. However, the above materials and dimensions are merely examples, and the material and dimensions of the substrate 4 are not limited to these. Taking a material as an example, the substrate 4 may be a thin plate made of a resin such as PMMA or PET in addition to glass. The rubber-like elastic body 5 is a thermosetting elastomer such as silicone rubber, urethane rubber, isoprene rubber, ethylene propylene rubber, natural rubber, ethylene propylene diene rubber or styrene butadiene rubber; urethane type, ester type, styrene type, olefin type, It is preferably composed of a butadiene-based or fluorine-based thermoplastic elastomer; or a composite thereof or the like, and particularly preferably composed of silicone rubber. The rubber-like elastic body 5 is preferably fixed to the outer surface of the substrate 4 with a thickness of 0.3 to 0.7 mm, more preferably with a thickness of 0.4 to 0.6 mm. Further, in this embodiment, the rubber-like elastic body 5 covers only the outer surface of the substrate 4 and does not extend from the outer surface to the front surface or the back surface of the substrate 4. Therefore, the rubber-like elastic body 5 exists on the outer surface of the substrate 4 in a form having a width equal to or smaller than the thickness of the substrate 4.

  The production method for partially covering the outer surface of the substrate 4 with the rubber-like elastic body 5 is not particularly limited, but preferably, the substrate 4 is set in a mold and an uncured rubber material is placed. An insert molding method in which the rubber-like elastic body 5 is formed in the vicinity of the outer surface of the corner portion 20 of the substrate 4 can be exemplified. When the rubber-like elastic body is coated annularly along the outer surface of the substrate 4, it is necessary to accurately position the substrate 4 in the mold, but compared with the vicinity of the outer surface of the corner portion 20 of the substrate 4. In the case where only the rubber-like elastic body 5 is coated, since the substrate 4 does not need to be positioned precisely, the yield of products is increased.

  3 shows an AA line cross-sectional view and a part B enlarged cross-sectional view of the portable electronic device display panel of FIG.

  In this embodiment, the display panel 3 is configured as a capacitive touch panel. The display panel 3 includes a surface layer 23 on the front surface side of the substrate 4 and a transparent electrode 24 on the back surface side of the substrate 4. The surface layer 23 is formed by laminating an optical adhesive layer 25, a UV resin layer 26, a printing layer 27, a transparent resin film 31, and a hard coat layer 32 in this order from the substrate 4 side. The optical adhesive layer 25 is an adhesive layer for forming the UV resin layer 26 and a layer above it on the substrate 4. The UV resin layer 26 is a layer that holds the printing layer 27 and fills the gap between the transparent resin film 31 and the optical adhesive layer 25. The printing layer 27 is a layer formed in a frame shape with a predetermined width on the outer edge of the substrate 4, and a black printing layer 28, a mirror silver printing layer 29, and a black printing layer 30 are laminated in order from the substrate 4 side. Become. The printing layer 27 is a layer formed for the purpose of forming a frame. The transparent resin film 31 is a layer made of a transparent resin such as PET, and is a coating layer for the purpose of preventing the substrate 4 from scattering. The transparent resin film 31 is a particularly effective layer when the substrate 4 is made of glass that is easily scattered. The hard coat layer 32 is a layer intended to prevent scratches.

  As an example, the surface layer 23 includes a plurality of layers as described above, but each layer is not an essential layer. Some or all of these layers may not be formed. Moreover, when the display board 3 is not used as a touch panel that combines operation and display, the transparent electrode 24 is also unnecessary.

  FIG. 4 shows a modification (4A, 4B, 4C) of the boundary portion between the substrate and the rubber-like elastic body viewed from the same viewpoint as the enlarged sectional view of FIG.

  As shown in the enlarged view B1, both corners of the outer surface of the substrate 4 may be cut obliquely, and the rubber-like elastic body 5 may be fixed to the outer surface including the slope 41 formed by the cut. The inclined surface 41 can be formed on the entire outer surface of the substrate 4, or can be formed only in a portion to which the rubber-like elastic body 5 is fixed or a predetermined length region including the portion. Further, as shown in the enlarged view B2, only one corner of the outer surface of the substrate 4 is cut to form a slope 41, and the other corner is cut at a substantially right angle to form a step surface 42. The rubber-like elastic body 5 may be fixed to the outer side surface including the step surface 42. The slope 41 and the stepped surface 42 can be formed on the entire outer surface of the substrate 4 as in the previous example, or formed only in a portion to which the rubber-like elastic body 5 is fixed or a predetermined length region including the portion. You can also Furthermore, as shown in the enlarged view B3, a groove 43 may be formed in the central portion of the outer surface of the substrate 4 in the thickness direction, and the rubber-like elastic body 5 may be fixed to the outer surface including the groove 43.

  In this way, the contact area between the substrate 4 and the rubber-like elastic body 5 can be reduced by removing the corners of the outside surface of the substrate 4 or forming irregularities on the outside surface and attaching the rubber-like elastic body 5 there. It can be enlarged, and the adhesion force between both 4 and 5 can be increased. In this embodiment, a material that forms an intervening layer that chemically bonds both the primer 4 and 5 between the substrate 4 and the rubber-like elastic body 5 can be used, or can be omitted. . In particular, when the rubber-like elastic body 5 is directly attached to the substrate 4 without using the material for forming the intervening layer, the processing on the outer surface of the substrate 4 may cause the adhesion force between the four and the five. It is more effective to increase Similarly, in each of the subsequent embodiments, both may be directly fixed without interposing anything between the rubber-like elastic body and the substrate. For processing the outer surface of the substrate 4, a mechanical cutting or polishing apparatus is used, a physical etching process using plasma, a chemical etching process using chemicals, a blasting process for colliding fine particles, and the like. Other methods may be used.

  FIG. 5 is a perspective view of a modified example of the display panel for the portable electronic device shown in FIG. 6 shows a cross-sectional view taken along the line CC of FIG.

  The display board 3a according to this modification is different from the display board 3 of FIG. 1 in that the rubber-like elastic body 5 is fixed to the vicinity of the outer surface of the corner portion 20a of the curved substrate 4a instead of the flat plate. Thus, when manufacturing the portable electronic device 1 using the curved board | substrate 4a, the contact location to the work table etc. of the board | substrate 4a becomes a corner | angular part 20a in a manufacturing process in many cases. Therefore, the rubber-like elastic body 5 effectively prevents the substrate 4a from being damaged or broken starting from the corner portion 20a. Further, when the mobile electronic device 1 is used, if vibration or impact is applied, stress may concentrate on the corner portion 20a. In particular, the corner 20a is likely to have a processing flaw when it is cut or polished during manufacture of the substrate 4a, and the processing flaw is likely to be a potential factor for damage or destruction of the substrate 4a. However, when the rubber-like elastic body 5 is fixed in the vicinity of the outer surface of the corner portion 20a, breakage and destruction starting from the corner portion 20a can be effectively prevented.

<Second Embodiment>
Next, a second embodiment of the display panel for a portable electronic device according to the present invention will be described. In this embodiment, the same reference numerals are given to the components common to the first embodiment, and the description thereof will be omitted as appropriate.

  FIG. 7 is a plan view of a display panel for a portable electronic device according to the second embodiment.

  The display board for portable electronic devices (hereinafter also simply referred to as “display board”) 3b according to this embodiment is similar to the display board 3 according to the first embodiment. It can be attached to the opening 10. The display board 3 b includes a transparent substantially rectangular substrate 4 and a rubber-like elastic body 5 b that partially covers the outer surface of the substrate 4. The rubber-like elastic body 5b is different from the rubber-like elastic body 5 according to the first embodiment except for the outer surface of the corner portion 20 of the substrate 4 and the outer surface of the predetermined length including the outer surface. It is separated into four and fixed to the substrate 4 so as to cover a region (center region) including the center of each of the outer side surfaces 21 and 22 on the side and long sides. For this reason, the display panel 3 b exposes the vicinity of the outer surface of the corner portion 20 of the substrate 4. When the display board 3b is fitted into the opening 10 of the housing 2, the rubber-like elastic body 5b contacts the inner side surface 12 on the short side and the long side of the display board 3b.

  When the rubber-like elastic body is coated annularly along the outer surface of the substrate 4, it is necessary to accurately position the substrate 4 in the mold, but compared to the short side and the long side of the substrate 4. When the rubber-like elastic body 5b is coated on the central region of the outer surfaces 21, 22, the substrate 4 is not required to be positioned accurately, so that the product yield is increased.

<Third Embodiment>
Next, a third embodiment of the display panel for a portable electronic device according to the present invention will be described. In this embodiment, the same reference numerals are given to the components common to the first embodiment, and the description thereof will be omitted as appropriate.

  FIG. 8 is a plan view of a display panel for a portable electronic device according to the third embodiment. FIG. 9 is a side view of the display panel for the portable electronic device of FIG. 8 as viewed from the short side direction. FIG. 10 is an enlarged cross-sectional view taken along the line DD of the display panel for the portable electronic device of FIG.

  A display board for a portable electronic device (hereinafter also simply referred to as “display board”) 3c according to this embodiment is similar to the display board 3 according to the first embodiment. It can be attached to the opening 10. The difference between the display board 3c and the display board 3 described above is the covering portion of the rubber-like elastic body 5c and its form. The form of the substrate 4 according to this embodiment is the same as that of the substrate 4 according to the first embodiment.

  The display panel 3 c includes a transparent substrate 4 having four corners 20 and a rubber-like elastic body 5 c that partially covers the outer surface of the substrate 4. The rubber-like elastic body 5 c is continuously formed so as to go around from the outer surface of the substrate 4 to the outer edge portion of the back surface of the substrate 4. More specifically, the rubber-like elastic body 5 c is short from the middle of the outer surface 21 on the short side of the substrate 4 through the outer surface 22 on the long side of the substrate 4 and the outer surface of the corner portion 20 of the substrate 4. It is continuously formed so as to wrap around the outer edge of the back surface on the side. The rubber-like elastic body 5c includes an outer surface covering portion 51 that extends from the outer surface 22 on the long side of the substrate 4 through the outer surface of the corner portion 20 to a part of the outer surface 21 on the short side, It is an annular elastic body that is continuously formed from the side surface covering portion 51 and has a back surface covering portion 52 that wraps around the back surface of the substrate 4 on the short side of the substrate 4 and covers the outer edge portion. For this reason, the center area | region pinched | interposed into the both corners 20 in the outer side surface 21 of the short side of the board | substrate 4 is exposed without being covered with the rubber-like elastic body 5c.

  Since the entire outer surface of the substrate 4 is not covered with a rubber-like elastic body, when the display plate 3c is manufactured by insert molding, the substrate 4 does not have to be positioned precisely in the mold. Further, the rubber-like elastic body 5c exists on both the outer surface and the back surface of the display panel 3c, and the rubber-like elastic body 5c can be brought into contact with the inner frame 11 and the inner side surface 12 in the opening 10 of the housing 2. Therefore, the rubber-like elastic body 5c can exhibit a function as a cushioning material against an impact or vibration from any of the thickness direction of the substrate 4 and the direction parallel to the surface. Furthermore, since the rubber-like elastic body 5c is a continuous elastic body having an unbroken shape, it can exhibit a waterproof function effective against water immersion from the gap between the opening 10 and the display panel 3c. In particular, even if either one of the gap between the inner side surface 12 and the rubber-like elastic body 5c or the gap between the inner frame 11 and the rubber-like elastic body 5c is present, it is high unless the other gap exists. Waterproofness can be maintained. Further, as compared with the case where the rubber-like elastic body is formed independently on the outer surface and the back surface of the substrate 4, by forming a continuous flow path between the mold and the substrate 4, an annular shape can be more easily formed. A rubber-like elastic body 5c can be formed. The rubber-like elastic body 5c is formed so as to completely cover the outer side 21 on the short side and wrap around the back surface of the outer side 22 without covering the central region of the outer side 22 on the long side. May be. Further, a rubber-like elastic body is coated so as to cover only the vicinity of the outer surface of the corner portion 20 of the substrate 4 and to wrap around the back surface of the substrate 4 on both sides of the outer surface 21 on the short side and the outer surface 22 on the long side. It may be formed.

  FIG. 11 is a perspective view of a modified example of the display panel for the portable electronic device shown in FIG.

  Unlike the display panel 3 of FIG. 8, the display panel 3d according to this modification has a substrate 4a that is curved so as to protrude in one direction (front direction) instead of a flat plate. The substrate 4a includes a rubber-like elastic body 5c in the vicinity of the outer surface of the corner portion 20a and the outer surface 22 on the long side. Thus, when manufacturing the portable electronic device 1 using the curved board | substrate 4a, the contact location to the work table etc. of the board | substrate 4a becomes a corner | angular part 20a in a manufacturing process in many cases. Therefore, the rubber-like elastic body 5c effectively prevents the substrate 4a from being damaged or broken starting from the corner portion 20a. Further, when the mobile electronic device 1 is used, if vibration or impact is applied, stress may concentrate on the corner portion 20a. In particular, the corner 20a is likely to have a processing flaw when it is cut or polished during manufacture of the substrate 4a, and the processing flaw is likely to be a potential factor for damage or destruction of the substrate 4a. However, if the rubber-like elastic body 5c is fixed so as to include the vicinity of the outer surface of the corner portion 20a, the possibility of preventing breakage and destruction starting from the corner portion 20a is increased.

  Also in this modified example, the rubber-like elastic body 5c has an outer surface 21 on the short side side by reversing the side covered with the rubber-like elastic body 5c and the side around which the rubber-like elastic body 5c wraps around as shown in FIG. May be formed by wrapping around the back surface of the outer surface 22 without covering the central region of the outer surface 22 on the long side.

<Fourth embodiment>
Next, a fourth embodiment of the display panel for a portable electronic device according to the present invention will be described. In this embodiment, the same reference numerals are given to the components common to the first embodiment, and the description thereof will be omitted as appropriate.

  FIG. 12 is a plan view of a display panel for a portable electronic device according to the fourth embodiment.

  The mobile electronic device display board (hereinafter, also simply referred to as “display board”) 3e according to this embodiment is the same as the display board 3 according to the first embodiment of the casing 2 of the mobile electronic device 1. It can be attached to the opening 10. The difference between the display board 3e and the display board 3c described above is the covering portion of the rubber-like elastic body 5e. The form of the substrate 4 according to this embodiment is the same as that of the substrate 4 according to the third embodiment.

  The display board 3 e includes a transparent substrate 4 having four corners 20 and a rubber-like elastic body 5 e that partially covers the outer surface of the substrate 4. The rubber-like elastic body 5e is continuously formed so as to go around from the outer surface of the substrate 4 to the outer edge portion of the back surface of the substrate 4. More specifically, the rubber-like elastic body 5 e covers the central region of the outer side surface 22 on the long side of the substrate 4, wraps around from the vicinity of the corner portion 20 of the substrate 4 to the outer edge portion of the back surface of the substrate 4, and again The substrate 4 is continuously formed so as to cover the central region of the outer surface 21 on the short side of the substrate 4. The rubber-like elastic body 5e is continuously formed from an outer surface covering portion 53 that covers the central regions of the outer surface 21 on the short side and the outer surface 22 on the long side of the substrate 4, and the outer surface covering portion 53. In the vicinity of the corner portion 20 of the substrate 4, it is an annular elastic body having a back surface coating portion 54 that wraps around the back surface of the substrate 4 and covers the outer edge portion. For this reason, the outer surface vicinity of the four corners 20 of the substrate 4 is exposed without being covered with the rubber-like elastic body 5e.

  Since the entire outer surface of the substrate 4 is not covered with the rubber-like elastic body, when the display plate 3e is manufactured by insert molding, it is not necessary to position the substrate 4 strictly in the mold. Further, the rubber-like elastic body 5e exists on both the outer surface and the back surface of the display panel 3e, and the rubber-like elastic body 5e can be brought into contact with the inner frame 11 and the inner surface 12 in the opening 10 of the housing 2. Therefore, the rubber-like elastic body 5e can exhibit a function as a cushioning material with respect to impact and vibration from any of the thickness direction of the substrate 4 and the direction parallel to the surface. Furthermore, since the rubber-like elastic body 5e is an annular continuous elastic body without any breaks, it can also exhibit a waterproof function effective against water immersion from the gap between the opening 10 and the display panel 3e. In particular, even if either one of the gap between the inner side surface 12 and the rubber-like elastic body 5e or the gap between the inner frame 11 and the rubber-like elastic body 5e is present, it is high unless the other gap exists. Waterproofness can be maintained. Further, as compared with the case where the rubber-like elastic body is formed independently on the outer surface and the back surface of the substrate 4, by forming a continuous flow path between the mold and the substrate 4, an annular shape can be more easily formed. A rubber-like elastic body 5e can be formed. The rubber-like elastic body 5e may be formed so as to cover the central region of the outer surface 21 on the short side and to wrap around the back surface of the outer surface 22 without covering the outer surface 22 on the long side. good. Further, the rubber-like elastic body 5e may be formed so as to cover the central region of the outer side 22 on the long side and wrap around the back surface of the outer side 21 without covering the outer side 21 on the short side. good.

<Fifth embodiment>
Next, a fifth embodiment of the display panel for a portable electronic device according to the present invention will be described. In this embodiment, the same reference numerals are given to the components common to the first embodiment, and the description thereof will be omitted as appropriate.

  FIG. 13: shows the top view of the display board for portable electronic devices which concerns on 5th Embodiment.

  A display board (hereinafter simply referred to as “display board”) 3f according to this embodiment is similar to the display board 3 according to the first embodiment. It can be attached to the opening 10. The difference between the display board 3f and the display board 3e described above is the covering portion of the rubber-like elastic body 5f. The form of the substrate 4 according to this embodiment is the same as that of the substrate 4 according to the fourth embodiment.

  The display panel 3 f includes a transparent substrate 4 having four corners 20 and a rubber-like elastic body 5 f that partially covers the outer surface of the substrate 4. The rubber-like elastic body 5f is continuously formed so as to go around from the outer surface of the substrate 4 to the outer edge portion of the back surface of the substrate 4. More specifically, the rubber-like elastic body 5f covers the vicinity of the outer surface of the corner portion 20 of the substrate 4 and is continuously formed so as to wrap around the outer edge portions of the back side of the short side and the long side of the substrate 4 from there. Has been. The rubber-like elastic body 5f is formed continuously from the outer surface covering portion 55 that covers the vicinity of the outer surface of the corner portion 20 of the substrate 4, and the outer surface 21 on the short side of the substrate 4 and the long side. This is an annular elastic body having a back surface covering portion 56 that wraps around the back surface side of each central region of the outer side surface 22 on the side and covers each outer edge portion. Therefore, the central regions of the outer side 21 on the short side and the outer side 22 on the long side of the substrate 4 are exposed without being covered with the rubber-like elastic body 5f.

  Since the entire outer surface of the substrate 4 is not covered with a rubber-like elastic body, when the display plate 3f is manufactured by insert molding, the substrate 4 does not have to be positioned precisely in the mold. Further, the rubber-like elastic body 5f exists on both the outer surface and the back surface of the display panel 3f, and the rubber-like elastic body 5f can be brought into contact with the inner frame 11 and the inner side surface 12 in the opening 10 of the housing 2. Therefore, the rubber-like elastic body 5f can exhibit a function as a cushioning material against an impact or vibration from any of the thickness direction of the substrate 4 and the direction parallel to the surface. Furthermore, since the rubber-like elastic body 5f is a continuous elastic body having a continuous shape, it can exhibit a waterproof function effective against water immersion from the gap between the opening 10 and the display panel 3f. In particular, even if either one of the gap between the inner side surface 12 and the rubber-like elastic body 5f or the gap between the inner frame 11 and the rubber-like elastic body 5f exists, it is high as long as the other gap does not exist. Waterproofness can be maintained. Further, as compared with the case where the rubber-like elastic body is formed independently on the outer surface and the back surface of the substrate 4, by forming a continuous flow path between the mold and the substrate 4, an annular shape can be more easily formed. A rubber-like elastic body 5f can be formed. The rubber-like elastic body 5f may be formed without covering the central region of the outer side 21 on the short side and without covering the outer side 22 on the long side. The rubber-like elastic body 5f may be formed without covering the central region of the outer side 22 on the long side and without covering the outer side 21 on the short side.

<Other embodiments>
The present invention is not limited to the above-described embodiments, and various modifications can be made.

  For example, in each of the third to fifth embodiments, the rubber-like elastic bodies 5c, 5e, and 5f are continuously formed so as to wrap around from the outer surface of the substrate 4 to the outer edge portion of the back surface of the substrate 4. 4 may be continuously formed so as to wrap around the outer edge of the surface of 4. In each of the third to fifth embodiments, a rubber-like elastic body may be fixed to the entire outer edge portion of the back surface or the front surface of the substrate 4. Even if the rubber-like elastic body is fixed in such a form, a high positioning accuracy of the substrate 4 is not required at the time of insert molding as in the other embodiments. When the inner frame 11 is formed on the front side of the opening 10 of the housing 2 and the display plates 3c, 3d, 3e, 3f are brought into contact with the back surface of the inner frame 11, the outer edge of the surface of the substrate 4 or the substrate 4a It is preferable to form rubber-like elastic bodies 5c, 5e, 5f on the part. In each of the second, fourth, and fifth embodiments, the substrate 4a may be used instead of the substrate 4. Further, the substrates 4 and 4a are thin plates having a substantially rectangular shape in a plan view, but may be a flat plate or a curved plate having a substantially triangular or pentagonal shape or more in a plan view.

  The form of the rubber-like elastic bodies 5c, 5e, and 5f is merely an example of a form continuously formed so as to wrap around from the outer surface of the substrate 4 to the outer edge of the front surface or the back surface of the substrate 4, and from the outer surface of the substrate 4. Other forms that wrap around at least one of the front surface and the back surface of the substrate 4 may be used. For example, a rubber-like elastic body that covers the central region of the outer surface 22 of the substrate 4 and covers the outer edge of the back surface of the substrate 4 outside the central region may be used. Further, it may be a rubber-like elastic body that covers only the vicinity of the outer surface of the two corners 20 of the substrate 4 and covers the outer edge of the back surface of the substrate 4 otherwise. Further, if the rubber-like elastic body is fixed to the outer surface of at least one side of the substrates 4 and 4a, the rubber-like elastic body may be fixed so as to go around the front or back surface of the substrates 4 and 4a on the other side.

  Further, the above-described embodiments can be arbitrarily combined with each other as long as they can be combined with each other. For example, in the first embodiment, the method of removing the corners of the outer surface of the substrate 4 described with reference to FIG. 4 or forming the irregularities on the outer surface is the same as the substrate 4 in the other embodiments. , 4a may be used for processing the outer surface. The processing may be performed not only on the outer surfaces of the substrates 4 and 4a, but also on the back and front edges of the substrates 4 and 4a and on the portions to which the rubber-like elastic bodies 5c, 5e, and 5f are fixed.

  The present invention can be used for, for example, a portable electronic device.

DESCRIPTION OF SYMBOLS 1 Portable electronic device 2 Case 3, 3a, 3b, 3c, 3d, 3e, 3f Display board (display board for portable electronic devices)
4, 4a Substrates 5, 5b, 5c, 5e, 5f Rubber elastic bodies 20, 20a Corner portions 21, 22 Outer side surfaces

Claims (5)

A display board for portable electronic devices,
A transparent substrate,
A rubber-like elastic body partially covering the outer surface of the substrate;
Equipped with a,
The rubber-like elastic body partially covers the outer surface of the substrate, and is continuously formed so as to go from the outer surface of the substrate to the outer edge portion of the front surface or the back surface of the substrate,
The rubber-like elastic body extends to and covers a part of the outer surface of one side through the outer surface of the corner of the substrate, wraps around the front surface or the back surface of the one side, and again the outer surface of the one side. covering the portable electronic equipment display panel characterized that you have to expose the central region of the outer surface sandwiched between both corner portions of the one side.   2. The display panel for portable electronic devices according to claim 1, wherein corners of the outer surface of the substrate are removed or irregularities are formed on the outer surface, and the rubber-like elastic body is adhered thereto. .   The display board for a portable electronic device according to claim 1, wherein the rubber-like elastic body is directly attached to the substrate. The substrate is a glass substrate,
The display board for portable electronic devices according to any one of claims 1 to 3, wherein the rubber-like elastic body is an elastic body made of silicone rubber.   The display board for a portable electronic device according to any one of claims 1 to 4, wherein the substrate is curved so as to protrude in one direction within the surface thereof.

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