JP2012209353A - Cover member for electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thin laminate integrated cover member which is adapted to fix an electronic apparatus body, and has shock resistance and gives a soft feeling.SOLUTION: There is provided the cover member for electronic apparatus which comprises a reinforcing plate covering a rear surface and a side surface of an electronic apparatus having a display screen on the front and arranged so that an edge of the side surface which is closed to the front is exposed, and an elastic layer laminated integrally on the surface of the reinforcing plate on the opposite side from the surface where the electronic apparatus is arranged, the elastic layer being arranged to cover an exposed part of the edge of the side surface of the electronic apparatus that the reinforcing plate does not cover. There is provided a mobile phone 11 constituted by forming a laminate integrated cover body 41 by injection-molding silicone rubber into a sectional shape shown in Fig., on a reinforcing plate 411 made of polycarbonate resin, and then fitting the laminate integrated cover 41 to the rear surface and side surface of a mobile phone body 21.

Description

  The present invention relates to a cover member for an electronic device. More specifically, the present invention relates to a laminated integrated cover member that is attached to an electronic device having a display unit on the front surface and has excellent impact resistance.

  As a display screen, electronic devices such as a mobile phone and a tablet-type personal computer having a liquid crystal touch panel in which an instruction is input by bringing a finger or a pen into contact with or in close proximity have been developed and commercialized.

  Such electronic devices have shapes and functions that are convenient to carry, but when used indoors and outdoors, they are more likely to be subjected to impacts such as dropping or collision than when used on a desk. In fact, a large amount of liquid crystal cracks are generated by such an impact.

  In order to protect the electronic device against an impact such as a drop or a collision, for example, at the four corners of the outer member of the main body case composed of an inner member made of synthetic resin and an outer member made of an elastic material covering the outside. There has been proposed a portable computer provided with a cushion portion made of an elastic material that is integrally formed with an outer member and protrudes from the outer surface of the corner (see, for example, Patent Document 1). Further, the side surface of the plate-shaped electronic device casing is wrapped around the entire circumference, and has an opening that covers a part of the plurality of connectors arranged on the side surface and exposes the remaining part of the connector. A detachable housing protective cover that does not deteriorate the operability and portability of electronic devices has been proposed (see, for example, Patent Document 2). Further, in mobile phones, the entire rear surface of the housing is fitted. A rubber molded product having a matching shape and a frame-shaped rubber molded product for protecting only the outer peripheral portion of the housing are commercially available for retrofitting to the mobile phone housing.

Japanese Patent No. 3088056 Japanese Laid-Open Patent Publication No. 2008-235326

  However, the method of providing cushions only at the four corners of the main body case as proposed in Patent Document 1 cannot sufficiently protect electronic devices when carried indoors and outdoors. Also, a removable protective cover that surrounds the entire circumference of the casing as disclosed in Patent Document 2, a frame-shaped rubber molded product that is commercially available, and a rubber that fits over the entire rear surface of the casing The molded product needs to be thick from the viewpoint of easy handling for retrofitting to the electronic equipment casing, and it is easy to come off when hand-rigging indoors and outdoors, and does not show sufficient impact resistance effect. There is.

  Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide a thin laminated integrated cover member that fixes an electronic device body, has impact resistance, and has a soft feel. .

  Such an object is achieved by the present inventions (1) to (13) below.

  (1) A reinforcing plate that covers the rear and side surfaces of an electronic device having a display screen on the front surface and that is exposed so that an edge near the front surface of the side surface is exposed, and a surface on which the electronic device of the reinforcing plate is disposed An elastic layer laminated and integrated on the surface opposite to the surface, and the elastic layer is disposed so as to cover the exposed portion of the edge of the side surface of the electronic device that is not covered by the reinforcing plate Equipment cover member.

  (2) The electronic device cover member according to (1), wherein the elastic layer is disposed so as to cover an outer edge portion of a front surface of the electronic device.

  (3) The electronic device cover member according to (1) or (2), wherein the elastic layer is arranged so as to cover a side surface of the electronic device over the entire inner edge of the end of the reinforcing plate.

  (4) The electronic device cover member according to (3), wherein the elastic layer includes a convex portion on a part of the inner edge portion of the end portion of the reinforcing plate or over the entire circumference.

  (5) The electronic device cover according to any one of (1) to (4), wherein the elastic layer is laminated and integrated on a surface of the reinforcing plate on which the electronic device is disposed and a surface on the opposite side. Element.

  (6) The electronic device cover member according to (5), wherein the surface of the elastic layer on which the electronic device is disposed has adhesiveness.

  (7) The electronic device includes a pushbutton switch on a side surface, and a facing portion of the pushbutton switch is covered with a thin elastic layer having a pusher, according to any one of (1) to (6) Electronic device cover member.

  (8) The electronic device cover member according to any one of (1) to (7), wherein the reinforcing plate is made of a thermoplastic resin.

  (9) The electronic device cover member according to (8), wherein the reinforcing plate is made of polycarbonate.

  (10) The electronic device cover member according to any one of (1) to (7), wherein the reinforcing plate is made of an Mg alloy or an Al alloy.

  (11) The electronic device cover member according to any one of (1) to (10), wherein the elastic layer is made of an elastomer.

  (12) The electronic device cover member according to any one of (1) to (11), wherein the elastic layer is made of silicone rubber.

  (13) The electronic device cover member according to (12), wherein the silicone rubber is a colored silicone rubber.

  According to the present invention, it is possible to provide a thin laminated integrated cover member that fixes an electronic device body, has impact resistance, and has a soft feel.

It is a perspective view which shows the structure of the mobile telephone which concerns on embodiment of this invention. It is AA arrow sectional drawing of FIG. 1 which shows the structure of the mobile telephone based on Example 1 of this invention. It is AA arrow sectional drawing of FIG. 1 which shows the structure of the mobile telephone based on Example 2 of this invention. It is AA arrow sectional drawing of FIG. 1 which shows the structure of the mobile telephone based on Example 3 of this invention. It is AA arrow sectional drawing of FIG. 1 which shows the structure of the mobile telephone based on Example 4 of this invention. It is AA arrow sectional drawing of FIG. 1 which shows the structure of the mobile telephone based on Example 5 of this invention. It is BB arrow sectional drawing of FIG. 1 which shows the structure of the mobile telephone which concerns on the comparative example 6 of this invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as embodiments) will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a perspective view showing a configuration of a mobile phone according to an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1 showing the configuration of the mobile phone according to the first embodiment of the present invention.

  As shown in FIG. 1, a mobile phone 1 according to an embodiment of the present invention includes a mobile phone body 2 having a display screen 3 on the front surface and a laminated integrated cover 4 that fits and fixes the mobile phone body 2. Is done. As shown in FIG. 2, the laminated integrated cover 4 has a configuration in which an elastic layer 412 is laminated and integrated with a reinforcing plate 411.

  The reinforcing plate 411 has a surface shape in which the upper side of the figure is fitted to the rear side of the mobile phone main body 2, but the exposed portion 211 that is not covered by the reinforcing plate 411 is formed on the upper side of the side of the mobile phone main body 2. The height is such that can be provided.

  The inner dimension in the width direction in the free state of the upper end portion of the reinforcing plate 411 is designed and manufactured to be smaller than the width of the mobile phone body 2. Therefore, when the mobile phone body 2 is fitted, the elasticity of the reinforcing plate 411 is increased. The mobile phone body 2 is fixed to the reinforcing plate 411 by the force.

  An elastic layer 412 is laminated and integrated on the lower surface of the reinforcing plate 411 and the exposed portion 211, and the elastic layer 412 protects the mobile phone body 2 against an impact such as a drop or collision of the mobile phone 1. .

  The reinforcing plate 411 can be made of a thermoplastic resin. Examples of the thermoplastic resin include polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polytrimethylene terephthalate (PTT), polyethylene naphthalate (PEN), polyester such as liquid crystal polyester, polyoxymethylene (POM), and polyamide. (PA), polycarbonate (PC), polyphenylene sulfide (PPS), polyphenylene ether (PPE), modified PPE, polyimide (PI), polyamideimide (PAI), polyetherimide (PEI), polysulfone (PSU), modified PSU, Polyethersulfone, polyketone (PK), polyetherketone (PEK), polyetheretherketone (PEEK), polyetherketoneketone (PEKK), polyarylate (PAR), Reether nitrile (PEN), phenolic resin, polypropylene (PP), polyethylene (PE), phenoxy resin, polystyrene-based, polyurethane-based, polyester-based, polyamide-based thermoplastic elastomers, and their copolymers, A modified body and a resin obtained by blending at least two of these can be used. From the viewpoint of the appearance of the molded product and dimensional stability, polycarbonate (PC) resin and styrene resin are preferable.

When the reinforcing plate 411 is made of PC resin, the thickness of the reinforcing plate 411 is 0.3 to
A range of 1.6 mm is preferred. If the thickness is less than 0.3 mm, there is a problem in strength, and if the thickness exceeds 1.6 mm, the size of the mobile phone 1 is simply increased.

  The reinforcing plate 411 can be formed by injection molding from a light alloy such as an Al alloy or Mg alloy, but is expensive in terms of cost.

  Examples of the elastomer constituting the elastic layer 412 include silicone rubber, polyurethane-based elastomer, ethylene-propylene-diene rubber (EPDM), styrene-butadiene rubber (SBR), acrylonitrile-butadiene rubber (NBR), hydrogenated acrylonitrile-butadiene rubber (H -NBR), chloroprene rubber (CR), etc., among which silicone rubber excellent in availability, durability, and transparency is preferable. In order to laminate and integrate with the reinforcing plate 411 by injection molding, it is liquid. Use silicone rubber. Vulcanizing agents, vulcanization accelerators, lubricants, auxiliaries, and the like may be added as appropriate without departing from the object of the present invention.

When silicone rubber is used for the elastic layer 412, the thickness of the elastic layer 412 in the layered portion with the reinforcing plate 411 is preferably 0.3 to 1.6 mm. If the thickness is less than 0.3 mm, the elastic body 412 may be easily peeled off due to scratches or the like,
If it exceeds 1.6 mm, the dimensions of the mobile phone 1 are simply increased.

  The silicone rubber used for the elastic layer 412 preferably has a Shore hardness Hs in the range of 30 to 60 from the viewpoint of impact resistance and tactile sensation during handling.

  The laminated integral molding of the reinforcing plate 411 made of PC resin and the elastic layer 412 made of silicone rubber is, for example, injection molding of silicone rubber into a PC resin molded body as disclosed in JP-A-6-171021. It can be performed by a known method.

  In the embodiment of the present invention, since the reinforcing plate 411 and the elastic layer 412 do not have to be bonded, it is possible to use one in which neither the PC resin nor the silicone rubber is modified, which is advantageous in terms of cost. .

  Since injection molding of silicone rubber is performed using liquid silicone rubber at a temperature lower than the glass transition point of the PC resin, it is preferable to use a PC resin having a high glass transition point.

  The elastic layer 412 can be made of colored silicone rubber, or it can be made of transparent silicone rubber, color coated thereon, and further decorated by printing to increase design options.

  Examples 1 to 7 according to embodiments of the present invention will be described below.

Example 1
FIG. 2 is a cross-sectional view taken along the line AA of FIG.

  A 0.8 mm thick reinforcing plate 411 made of PC resin, liquid silicone rubber KE2090-40-A / B manufactured by Shin-Etsu Chemical Co., Ltd. in the cross-sectional shape shown in FIG. The laminated integrated cover 41 having a thickness of 1.6 mm was obtained by injection molding to 0.8 mm. Next, the laminated integrated cover 41 was fitted to the rear surface and the side surface of the mobile phone body 21 to obtain the mobile phone 11.

  Since the exposed portion 211 on the side surface of the main body 21 of the cellular phone is covered with the silicone rubber elastic layer 412 over the entire circumference, the rear surface and side surfaces of the cellular phone 11 are all protected with silicone rubber. Therefore, the mobile phone 11 provided with the laminated integrated cover 41 has high impact resistance.

(Example 2)
FIG. 3 is a cross-sectional view taken along the line AA of FIG.

  A reinforcing plate 421 made of PC resin with a thickness of 0.8 mm, a liquid silicone rubber KE2090-40-A / B manufactured by Shin-Etsu Chemical Co., Ltd. in the cross-sectional shape shown in FIG. The laminated integrated cover 42 having a thickness of 1.6 mm was obtained by injection molding to 0.8 mm. Next, the laminated integrated cover 42 was fitted to the rear surface and the side surface of the mobile phone body 22 to obtain the mobile phone 12.

  Since the exposed portion 221 on the side surface of the mobile phone body 22 and the outer edge portion 222 on the front surface are covered with an elastic layer 422 of silicone rubber over the entire circumference, the outer edge portions on the rear surface, side surface, and front surface of the mobile phone body 22 are all made of silicone rubber. Protected. Therefore, the cellular phone 12 provided with the laminated integrated cover 42 has a higher impact resistance.

(Example 3)
4 is a cross-sectional view taken along the line AA in FIG. 1 showing the configuration of the mobile phone according to the third embodiment.

  4 is a cross-sectional shape of a liquid silicone rubber KE2090-40-A / B manufactured by Shin-Etsu Chemical Co., Ltd. on a 0.8 mm thick reinforcing plate 431 having a reinforcing plate end inner edge 232 made of PC resin. Further, the elastic layer 432 was injection molded to a laminated thickness of 0.8 mm to obtain a laminated integrated cover 43 having a thickness of 1.6 mm. Next, the laminated integrated cover 43 was fitted to the rear surface and the side surface of the mobile phone body 23 to obtain the mobile phone 13.

  Since the inner side of the exposed portion 231 and the reinforcing plate end inner edge portion 232 on the side surface of the main body 23 of the mobile phone is covered with the elastic layer 432 of silicone rubber over the entire circumference, the rear surface, side surface, and front surface of the mobile phone main body 23 are covered. All the outer edges of are protected with silicone rubber. Therefore, the cellular phone 13 provided with the laminated integrated cover 43 has a higher impact resistance, and further, the elastic force of the reinforcing plate end inner edge 232 passes through the inner silicone rubber elastic layer and the cellular phone main body 23. Therefore, the mobile phone body 23 is more firmly fixed to the laminated integrated cover 42.

Example 4
FIG. 5 is a cross-sectional view taken along the line AA of FIG.

A protrusion was further provided on the inner side surface of the elastic layer 432 of Example 3.
5 is a cross-sectional shape of a liquid silicone rubber KE2090-40-A / B manufactured by Shin-Etsu Chemical Co., Ltd. on a 0.8 mm thick reinforcing plate 441 having a reinforcing plate end inner edge 242 made of PC resin. Further, the elastic layer 442 was injection-molded to a laminated thickness of 0.8 mm to obtain a laminated integrated cover 44 having a thickness of 1.6 mm. Next, the laminated integrated cover 44 was fitted to the rear surface and the side surface of the mobile phone body 24 to obtain the mobile phone 14.

  The exposed portion 241 and the inner portion of the reinforcing plate end inner edge portion 242 on the side surface of the mobile phone body 24 are covered with the silicone rubber elastic layer 442 over the entire circumference, so that the rear surface, side surface, and front surface of the mobile phone 21 are covered. All outer edges are protected with silicone rubber. Further, the elastic layer in the inner portion of the reinforcing plate end inner edge 242 is provided with a protrusion 243 toward the side surface of the mobile phone body 24. Therefore, the cellular phone 12 provided with the laminated integrated cover 44 has higher impact resistance. Further, the elastic force of the reinforcing plate end inner edge 242 passes through the inner elastic layer of silicone rubber and its protrusion 243. Since the mobile phone body 24 is fixed, the mobile phone body 24 is more firmly fixed to the laminated integrated cover 44. The protrusion 243 may be provided on a part of the elastic layer or may be provided over the entire circumference. Further, a concave portion may be provided at the position of the side surface of the mobile phone body 24 corresponding to the protrusion 243.

(Example 5)
FIG. 6 is a cross-sectional view taken along the line AA in FIG.

  A liquid silicone rubber KE2090-40-A / B manufactured by Shin-Etsu Chemical Co., Ltd. is formed on both side surfaces of a 0.8 mm thick reinforcing plate 451 made of PC resin in the cross-sectional shape shown in FIG. A laminated integrated cover 45 having a thickness of 1.6 mm was obtained by injection molding to a laminated thickness of 0.4 mm. Next, an adhesive silicone rubber having a thickness of about 10 μm was coated on the surface of the inner elastic layer 453 and heated and vulcanized so that the surface of the inner elastic layer 453 had adhesiveness. The laminated integrated cover 45 was fitted and adhered to the rear surface and side surface of the mobile phone body 25 to obtain the mobile phone 15.

  Since the entire rear surface and side surfaces of the mobile phone body 25 are covered with the inner elastic layer 453 of silicone rubber, the rear surface and side surfaces of the mobile phone body 25 are all protected with silicone rubber. Therefore, even if the inner side of the laminated integrated cover 45 is the inner elastic layer 453, the rear surface and the side surface of the mobile phone body 25 are firmly fitted and fixed to the laminated integrated cover 45, and further have elastic layers on both sides. The mobile phone 15 provided with the laminated integrated cover 45 has a higher impact resistance.

(Example 6)
FIG. 7 is a cross-sectional view taken along the line B-B in FIG. 1, illustrating a configuration in the vicinity of the push button switch of the mobile phone according to the sixth embodiment.

  On the reinforcing plate 461 made of PC resin with a thickness of 0.8 mm, the liquid silicone rubber KE2090-40-A / B manufactured by Shin-Etsu Chemical Co., Ltd. has the cross-sectional shape shown in FIG. The laminated integrated cover 46 having a thickness of 1.6 mm was obtained by injection molding to .8 mm. Next, the laminated integrated cover 46 was fitted to the rear surface and the side surface of the mobile phone body 26 to obtain the mobile phone 16.

  The mobile phone body 26 has a push button switch 261 on the side surface. The switch 51 is provided with a pusher 76 for pushing the pushbutton switch 261, and the pusher 76 is covered with a thin silicone rubber elastic layer. Since the side surface of the mobile phone body 26 is covered with an elastic layer 462 of silicone rubber over the entire circumference except for the switch portion 51, the rear surface and side surfaces of the mobile phone body 26 are all protected with silicone rubber. Therefore, the mobile phone 16 provided with the laminated integrated cover 46 has high impact resistance.

From the embodiment of the present invention, a thin laminated integrated cover composed of a PC resin reinforcing plate and a silicone rubber elastic layer is fitted and fixed to the rear surface and side surface of the portable electronic device main body, which is excellent in impact resistance. It became clear that electronic devices could be configured.
(A) Since the outer surface of the laminated integrated cover is made of an elastic layer of silicone rubber, a portable electronic device that can be handled with a soft feel can be provided.
(B) Since the outer surface of the laminated integrated cover is composed of an elastic layer of silicone rubber, it is possible to provide an electronic device that is excellent in impact resistance during dropping and collision.
(C) The elastic layer is composed of colored silicone rubber, or is composed of transparent silicone rubber, and color coating is applied on the elastic layer.
(D) In the present invention, since the reinforcing plate and the elastic layer are integrally formed, it is not necessary to cover the cover one by one, and there is no fear that the cover will come off.

  As mentioned above, although this invention was demonstrated using embodiment, it cannot be overemphasized that the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above embodiment. Further, it is apparent from the description of the scope of claims that embodiments with such changes or improvements can also be included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Mobile phone 2 Mobile phone main body 3 Display screen 4 Laminate integrated cover 5 Switch part 11, 12, 13, 14, 15, 16 Mobile phone 21, 22, 23, 24, 25, 26 Main body 41, 42, 43, 44, 45, 46 Stacked integrated cover 51 Switch part 76 Pusher 211, 221, 231, 241, 251 Exposed part 222 Outer edge part 232, 242 Reinforcement plate end inner edge part 243 Protrusion 261 Pushbutton switch 411, 421, 431, 441, 451, 461 Reinforcement plate 412, 422, 432, 442, 452, 462 Elastic layer 453 Inner elastic layer

Claims (13)

A reinforcing plate that covers a rear surface and a side surface of an electronic device having a display screen on the front surface, and is arranged so that an edge portion of the side surface close to the front surface is exposed;
The reinforcing plate comprises an elastic layer laminated and integrated on the surface opposite to the surface on which the electronic device is disposed,
The electronic device cover member, wherein the elastic layer is disposed so as to cover an exposed portion of a side edge of the electronic device that is not covered by the reinforcing plate.   The electronic device cover member according to claim 1, wherein the elastic layer is disposed so as to cover an outer edge portion of the front surface of the electronic device.   3. The electronic device cover member according to claim 1, wherein the elastic layer is disposed so as to cover a side surface of the electronic device over the entire circumference of the inner edge portion of the end portion of the reinforcing plate.   4. The electronic device cover member according to claim 3, wherein the elastic layer includes a convex portion at a part of an inner edge portion of the end portion of the reinforcing plate or over the entire circumference.   The electronic device cover according to any one of claims 1 to 4, wherein the elastic layer is laminated and integrated on a surface of the reinforcing plate on which the electronic device is disposed and a surface on the opposite side. Element.   The electronic device cover member according to claim 5, wherein a surface of the elastic layer on a side where the electronic device is disposed has adhesiveness.   The electronic device according to any one of claims 1 to 6, wherein the electronic device includes a push button switch on a side surface, and an opposing portion of the push button switch is covered with the thin elastic layer having a pusher. Equipment cover member.   The electronic device cover member according to claim 1, wherein the reinforcing plate is made of a thermoplastic resin.   The electronic device cover member according to claim 8, wherein the reinforcing plate is made of polycarbonate.   The electronic device cover member according to claim 1, wherein the reinforcing plate is made of an Mg alloy or an Al alloy.   The electronic device cover member according to claim 1, wherein the elastic layer is made of an elastomer.   The electronic device cover member according to claim 1, wherein the elastic layer is made of silicone rubber.   The electronic device cover member according to claim 12, wherein the silicone rubber is a colored silicone rubber.

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