JP6277240B1 - Electronics - Google Patents

Abstract

An antenna is arranged on the upper side of a lid of a clamshell type notebook PC, and wireless communication is satisfactorily performed even when a radio station exists on the opposite side of the antenna with the lid closed. To provide an electronic device that can An electronic device is provided with an antenna 24 as an adaptive array antenna provided on an upper portion of a lid that can be opened and closed with respect to an apparatus body, and capable of wireless communication via the antenna 24 even when the lid is closed. The antenna 24 is formed by being surrounded by a GFRP portion 32 made of a dielectric material at the upper end edge of the back cover 23a of the lid, and the back side CFRP other than the upper end edge of the back cover 23a of the lid is formed. The metal sheet 42 was disposed between the CFRP sheets 41 and 43 of the back side CFRP sheet 51 by covering with the sheet 51 and the front side CFRP sheet 53. [Selection] Figure 6

Description

  The present invention improves the wireless communication even when the antenna is arranged on the upper side of the lid of the clamshell type notebook PC, and the radio station exists on the opposite side of the antenna with the lid closed. The present invention relates to electronic devices that can be used.

  The casings of various electronic devices such as notebook personal computers (hereinafter referred to as notebook PCs), tablet personal computers (hereinafter referred to as tablet PCs), smartphones and mobile phones are lightweight, thin and strong. Need to be. Therefore, for example, a housing material formed by laminating a plurality of layers of CFRP (carbon fiber reinforced plastic) in which a reinforcing fiber such as carbon fiber is impregnated with a thermosetting resin such as an epoxy resin is formed in a casing of an electronic device. Is widely used.

  In recent years, electronic devices such as notebook PCs are equipped with wireless communication antennas as standard. An antenna for wireless communication is arranged so that the sensitivity of the antenna is best when using an electronic device. For example, Patent Document 1 discloses a configuration in which an antenna is arranged on the upper side of a display device.

JP 2002-151928 A

  By the way, the notebook PC includes a device main body having a keyboard device and a rectangular flat cover having a display device such as a liquid crystal display, and the lid is connected to the device main body by left and right hinges so as to be opened and closed. The clamshell type is common. In the clamshell notebook PC, when an antenna is arranged on the upper side of the display device, communication with the antenna can be performed satisfactorily when the lid is open because nothing interferes with the antenna radio waves. However, if there is a wireless station on the opposite side of the antenna due to restrictions on the arrangement of the wireless station with the lid closed, a notebook PC will be interposed between the antenna and the wireless station, May not be performed well. In particular, when CFRP or the like is used for the casing of the lid of the notebook PC, carbon easily absorbs radio waves, so that the radio waves are attenuated to reduce the reachability of the radio waves. Here, the communication with the lid closed is, for example, a case where the notebook PC is in a standby state and the notebook PC is accessed from the wireless station side.

  Particularly in recent wireless LANs, a high frequency in the 60 GHz band such as WiGig (registered trademark) has been frequently used. In this case, there is a case where radio waves are highly straight and communication cannot be performed more satisfactorily because the main body of the notebook PC is interposed between the wireless docking station and the antenna.

  The present invention has been made in view of the above, and an antenna is disposed on the upper side of a lid of a clamshell type notebook PC, and a radio station exists on the opposite side of the antenna with the lid closed. It is an object of the present invention to provide an electronic device that can satisfactorily perform wireless communication even when it is to be performed.

  In order to solve the above-described problems and achieve the object, an electronic device according to the present invention is provided with an adaptive array antenna on an upper portion of a lid body that can be opened and closed with respect to the apparatus main body, An electronic device capable of wireless communication via an adaptive array antenna, wherein the adaptive array antenna is formed by being surrounded by a dielectric material at an upper end edge of a back cover of the lid, and the back cover of the lid Of these, the back side and the front side other than the upper edge are covered with a carbon fiber reinforced plastic sheet, and a metal sheet is disposed between the upper and lower surfaces of the carbon fiber reinforced plastic sheet on the back side, or between the carbon fiber reinforced plastic sheets. It is characterized by that.

  Moreover, the electronic device according to the present invention is characterized in that, in the above invention, the metal sheet is disposed between two carbon fiber reinforced plastic sheets laminated with carbon fiber directions orthogonal to each other.

  In the electronic device according to the present invention, in the above invention, at least the back side and the front side of the back cover are each formed of two carbon fiber reinforced plastic sheets laminated with carbon fiber directions orthogonal to each other, and at least The metal sheet is disposed between two carbon fiber reinforced plastic sheets on the back side.

  Further, in the electronic device according to the present invention, in the above invention, the metal sheet is disposed on the uppermost surface of the carbon fiber reinforced plastic sheet on the back side and / or on the lowermost surface of the carbon fiber reinforced plastic sheet on the front side. It is characterized by.

  According to the present invention, among the back cover of the lid, the back side and the front side other than the upper edge are covered with the carbon fiber reinforced plastic sheet, and the top surface, the bottom surface, or the carbon of the carbon fiber reinforced plastic sheet on the back side. By placing a metal sheet between the fiber reinforced plastic sheets, the antenna is placed on the upper side of the lid of the clamshell notebook PC, and the radio station exists on the opposite side of the antenna with the lid closed. Even in this case, wireless communication can be performed satisfactorily.

FIG. 1 is a perspective view showing an external configuration of a notebook PC, which is an example of an electronic apparatus according to an embodiment of the present invention, in a state where a lid is opened. FIG. 2 is a diagram illustrating an example of an arrangement state in which wireless communication with the wireless docking station is performed with the lid of the electronic device closed. FIG. 3 is a front view illustrating an example of the lid of the electronic device. FIG. 4 is a schematic diagram of a cross section taken along line AA of the lid shown in FIG. FIG. 5 is a view showing a cross section of the back cover in the lid shown in FIG. 3. FIG. 6 is a cross-sectional view showing a configuration in which a metal sheet is provided only on the back side CFRP sheet of the back cover shown in FIG. FIG. 7 is a cross-sectional view showing a configuration in which a metal sheet is provided on the uppermost surface of the back-side CFRP sheet and the lowermost surface of the front-side CFRP sheet of the back cover shown in FIG.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a perspective view showing an external configuration of a notebook PC (1) that is an example of an electronic apparatus according to an embodiment of the present invention with a lid 20 opened. The electronic device 1 includes a device main body 10 including a keyboard device 11 and a rectangular flat plate-shaped lid body 20 including a display device 21 including a liquid crystal display. The lid body 20 is attached to the device main body 10 by left and right hinges 22. It is a clamshell type that can be opened and closed.

  An antenna 24, which is an adaptive array antenna that can electronically change the directivity in a direction in which the radio wave intensity is large, is disposed on the lid 20. A wireless docking station 2 is arranged behind the notebook PC 1 (Y direction). In the state where the lid 20 is open, there is no obstacle such as metal such as metal between the antenna 24 and the wireless docking station 2, so that wireless communication can be performed satisfactorily.

  As shown in FIG. 2, even when the lid 20 is closed, the notebook PC 1 needs to be able to perform wireless communication with the wireless docking station 2 when the notebook PC 1 is in a standby state. Here, as shown in FIG. 2, when the antenna 24 is located on the opposite side of the wireless docking station 2, radio waves are shielded between the antenna 24 and the wireless docking station 2 by metal inside the device body 10. In this embodiment, wireless communication can be performed satisfactorily even in such an arrangement state.

  Various electronic components such as a substrate, a processing unit, a hard disk device, and a memory (not shown) are accommodated inside the device body 10. As shown in FIG. 1, the lid 20 includes a back cover 23 a and a front cover 23 b, and includes an electronic device casing 23 in which electronic components in various places are accommodated.

  As shown in FIGS. 1 to 3, the back cover 23 a is a cover member provided on the back side of the electronic device casing 23. Specifically, as shown in FIG. 3, the back cover 23 a is provided on the back side of the front cover 23 b and the display device 21. Further, as shown in FIG. 3, the back cover 23a is formed by impregnating a CFRP portion 31 formed by laminating a plurality of prepregs in which carbon reinforced fibers are impregnated with thermosetting resin and glass reinforced fibers with impregnated thermosetting resin. The GFRP portion 32 is formed by laminating a plurality of prepregs.

  As shown in FIG. 1, the front cover 23 b is a cover member provided on the front side of the electronic device casing 23. The front cover 23b is provided around the display device 21 as shown in FIG. 3, and is arranged on the front side of the back cover 23a as shown in FIG.

  As shown in FIG. 4, an attachment member 25 for attaching the front cover 23b to the back cover 23a is provided between the back cover 23a and the front cover 23b. Further, an attachment member 26 for attaching the display device 21 to the back cover 23a is provided between the back cover 23a and the display device 21.

[Detailed Configuration of Back Cover 23a]
Here, FIG. 5 is a view showing a cross section of the back cover 23a in the cross section taken along the line AA of the lid 20 which is the display device 21 shown in FIG. In FIG. 5, the GFRP portion 32 at the upper edge of the back cover 23a is glass fiber reinforced plastic (GFRP). On the front side of the GFRP section 32, an antenna 24 that is an adaptive array antenna is arranged. Since the GFRP unit 32 is a dielectric, radio waves transmitted and received by the antenna 24 are transmitted. Note that the GFRP portion 32 is formed by injection molding.

  In the CFRP portion 31, a carbon fiber reinforced plastic (CFRP) sheet obtained by impregnating a carbon reinforced fiber with a thermosetting resin such as an epoxy resin is laminated on the back side (Z direction) and the front side (−Z direction). . On the back side, a CFRP sheet 41 in which the fiber direction is arranged in the X direction, a metal sheet 42 such as aluminum, and a CFRP sheet 43 in which the fiber direction is arranged in the Y direction are sequentially laminated from the Z direction. 51 is arranged. On the other hand, on the front side, from the −Z direction, a CFRP sheet 47 in which the fiber direction is arranged in the X direction, a metal sheet 46 such as aluminum, and a CFRP sheet 45 in which the fiber direction is arranged in the Y direction are sequentially laminated. A side CFRP sheet 52 is disposed. Note that the fiber directions are orthogonal to ensure the strength of the back-side CFRP sheet 51 and the front-side CFRP sheet 52.

  The core portion 44 is provided between the back side CFRP sheet 51 and the front side CFRP sheet 52. The core part 44 may be, for example, a structure in which CFRP sheets 41 and 43 not including the metal sheet 42 are sequentially and repeatedly laminated, or may be a carbon fiber reinforced plastic having randomly arranged carbon fiber whiskers. Alternatively, GFRP or foam material may be used. In order to ensure the strength of the back cover 23a, it is sufficient that at least the outermost layer and the innermost layer are made of CFRP.

  The CFRP portion 31 of the back cover 23a having such a structure is formed by hot press molding using a mold. That is, it is formed by laminating glass fibers or carbon fibers impregnated with a thermosetting resin, and metal sheets 42 and 46, and pressurizing while heating to cure the thermosetting resin. The back cover 23a is provided with a heat conduction function by the CFRP portion 31, so that heat can be diffused.

  Here, when the cover 20 is closed and the antenna 24 is located on the opposite side of the wireless docking station 2, the back cover 23a having the metal sheets 42 and 46 shown in FIG. The reach of radio waves in the case of the back cover without 42 and 46 was compared. The antenna 24 is an adaptive array antenna that transmits and receives a frequency band of 60 GHz. As a result, when the metal sheets 42 and 46 are provided, the communication establishment distance is increased about five times as compared with the case where the metal sheets 42 and 46 are not provided. That is, by providing the metal sheets 42 and 46 on the back cover 23a, good wireless communication is performed even when the lid 20 is closed and the antenna 24 is located on the opposite side of the wireless docking station 2. be able to.

  As shown in FIG. 6, the same results as in FIG. 5 were obtained even with the front-side CFRP sheet 53 in which the metal sheet 46 was not provided on the front-side CFRP sheet 52. Therefore, the metal sheet 42 may be provided at least on the back side.

  Further, in FIG. 5, the metal sheet 42 is sandwiched between the CFRP sheets 41 and 43, but as shown in FIG. 7, the uppermost surface on the back side of the CFRP sheet 41 and / or the front surface of the CFRP sheet 43. It is good also as the back side CFRP sheet 51 'provided in the lowermost side of the side, and / or the front side CFRP sheet 52'.

  Furthermore, instead of the metal sheet 42, a metal paint may be applied to the uppermost surface on the back side of the CFRP sheet 41.

DESCRIPTION OF SYMBOLS 1 Electronic device 2 Wireless docking station 10 Device main body 11 Keyboard device 20 Cover body 21 Display device 22 Hinge 23 Electronic device housing 23a Back cover 23b Front cover 24 Antenna 25, 26 Mounting member 31 CFRP portion 32 GFRP portion 41, 43, 45, 47 CFRP sheet 42, 46 Metal sheet 44 Core portion 51, 51 'Rear side CFRP sheet 52, 52', 53 Front side CFRP sheet

Claims (4)

An adaptive array antenna is provided on the top of a lid that can be opened and closed with respect to the apparatus main body, and is an electronic device capable of wireless communication via the adaptive array antenna even when the lid is closed,
The adaptive array antenna is formed by being surrounded by a dielectric material at an upper end edge of a back cover of the lid,
Of the back cover of the lid, the back side and the front side other than the upper edge are covered with a carbon fiber reinforced plastic sheet, and the top and bottom surfaces of the carbon fiber reinforced plastic sheet on the back side, or the carbon fiber reinforced plastic sheet An electronic device having a metal sheet disposed therebetween.   The electronic device according to claim 1, wherein the metal sheet is disposed between two carbon fiber reinforced plastic sheets laminated with carbon fiber directions orthogonal to each other.   At least the back side and the front side of the back cover are each formed by two carbon fiber reinforced plastic sheets laminated with carbon fiber directions orthogonal to each other, and the metal sheet is at least between the two carbon fiber reinforced plastic sheets on the back side. The electronic device according to claim 1, wherein the electronic device is arranged.   2. The electronic device according to claim 1, wherein the metal sheet is disposed on an uppermost surface of the carbon fiber reinforced plastic sheet on the back side and / or a lowermost surface of the carbon fiber reinforced plastic sheet on the front side.

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