JP2018107633A - Mobile radio device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mobile radio device having a new structure which contributes to miniaturization.SOLUTION: A mobile radio device includes a first board, second board, case, and battery. The second board is arranged separately from the first board. The case has a plate-like section. The plate-like section is arranged between the first board and the second board. Relay wiring for electrically connecting the signal wiring of the first board and the signal wiring of the second board is formed on the first surface of the plate-like section. A first grounding member for connecting ground wiring of the first board and ground wiring of the second board is formed on the second surface opposite to the first surface of the plate-like section, along the extending direction of the relay wiring. The second surface of the plate-shaped section is faced to the battery.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a portable wireless device.

  2. Description of the Related Art In portable wireless devices such as smartphones and tablet terminals, a technology has been developed that electrically connects substrates disposed apart from each other in the device. For example, Patent Document 1 discloses a portable wireless device that electrically connects an antenna substrate and a main circuit substrate using a coaxial cable. Here, the main circuit board is the largest circuit board among the circuit boards inside the housing.

JP 2010-258826 A

  2. Description of the Related Art In recent years, portable wireless devices have become thinner in the thickness direction of the housing and smaller in the surface direction different from the thickness direction (hereinafter, these are collectively referred to as miniaturization). When the antenna board and the main circuit board are connected by a coaxial cable as in the portable wireless device of Patent Document 1, there is a restriction on the miniaturization of the housing. Therefore, there is a demand for a new structure that contributes to downsizing instead of a structure using a coaxial cable.

  An object of the present invention is to provide a portable radio apparatus having a new structure that contributes to downsizing.

  A portable wireless device according to an embodiment of the present invention includes a first substrate, a second substrate, a housing, and a battery. The second substrate is disposed away from the first substrate. The housing has a plate-like portion. The plate-like portion is disposed between the first substrate and the second substrate. On the first surface of the plate-like portion, a relay wiring that electrically connects the signal wiring of the first substrate and the signal wiring of the second substrate is formed. On the second surface opposite to the first surface of the plate-like portion, the ground wiring of the first substrate and the ground wiring of the second substrate are connected along the extending direction of the relay wiring. A first grounding member is formed. The second surface of the plate-like portion faces the battery.

  According to one embodiment of the present invention, it is possible to provide a portable wireless device having a new structure that contributes to downsizing.

1 is an external view of a portable wireless device according to a first embodiment. It is a bottom view which shows the back side of the portable radio | wireless apparatus of FIG. It is sectional drawing which follows the III-III line of FIG. It is sectional drawing which follows the IV-IV line of FIG. It is a perspective view which shows a part of plate-shaped part. It is a top view which shows the example of arrangement | positioning of the through hole formed in the plate-shaped part. It is a bottom view which shows the back side of the portable radio | wireless apparatus which concerns on 2nd Embodiment.

  Hereinafter, each embodiment of the present disclosure will be described with reference to the drawings.

(First embodiment)
With reference to FIG. 1, an external configuration of the mobile wireless device 1 according to the present embodiment will be described. FIG. 1A is a top view showing the front side of the portable wireless device 1. FIG. 1B is a bottom view showing the back side of the portable wireless device 1.

  The portable wireless device 1 shown in FIG. 1 is a smartphone. As an alternative example, the portable wireless device 1 may be a portable wireless device having a wireless communication function other than a smartphone. For example, the mobile wireless device 1 may be a mobile phone terminal, a Fablet, a tablet PC, a feature phone, a PDA, a remote control terminal, a portable music player, a game machine, an electronic book reader, or the like.

  As shown in FIG. 1A, the portable wireless device 1 includes a front cover 15 and a display 14 on the front side. Moreover, as shown in FIG.1 (b), the portable radio | wireless apparatus 1 is provided with the rear cover 10 on the back side.

  The front cover 15 constitutes the outer peripheral portion of the front surface of the portable wireless device 1. The front cover 15 is made of resin, for example. For example, the front cover 15 may include a hole (space) in a portion that transmits sound from a speaker and a portion that corresponds to a physical button used by the user. Further, the front cover 15 may be transparent at a portion corresponding to the display 14 or may be provided with a hole (space). The front cover 15 may have a metal part. For example, the front cover 15 may be formed by insert molding a resin into a metal.

  The display 14 displays a screen. The screen includes at least one of, for example, a character, an image, a symbol, and a graphic. The display 14 may be a liquid crystal display, an organic EL panel (Organic Electro-Luminescence Panel), an inorganic EL panel, or the like. In the present embodiment, the display 14 is a touch screen display. The touch screen display detects a contact of a finger or a stylus pen and specifies the contact position.

  The rear cover 10 constitutes the outer peripheral portion of the back surface of the mobile wireless device 1. The rear cover 10 is made of resin, for example. The rear cover 10 may be subjected to surface processing so that the user can easily grip it. The rear cover 10 may have a metal part. For example, the rear cover 10 may be formed by insert molding a metal into a resin.

  FIG. 2 is a bottom view showing the back side of the portable wireless device 1 with the rear cover 10 removed. As shown in FIG. 2, the mobile wireless device 1 includes a resin casing 11, a first substrate 12 </ b> A, a second substrate 12 </ b> B, and a battery 13. In FIG. 2, the components indicated by the broken lines indicate that they are arranged on the front side (the back side of the paper in FIG. 2) from the resin casing 11.

  The resin casing 11 is a resin casing. The resin casing 11 has a plate-like portion 20 on the back side. The plate-like portion 20 is disposed across the first substrate 12A and the second substrate 12B. Here, among the surfaces of the plate-like portion 20, the surface on the back side of the portable wireless device 1 is the first surface 21, and the surface on the front side of the portable wireless device 1 (the surface opposite to the first surface 21) is the second. The surface 22 is used (see FIG. 4). As shown in FIG. 2, the plate-like portion 20 is disposed at a position overlapping the battery 13 when viewed from the first surface 21 side.

  The first board 12A and the second board 12B wire and fix (mount) electronic components used in an electronic circuit for realizing various functions of the mobile wireless device 1. The first substrate 12A and the second substrate 12B are arranged apart from each other. In the present embodiment, the first substrate 12A is a main circuit substrate that is larger than the second substrate 12B. A processor 19 is disposed on the first substrate 12A. For example, an antenna is connected to the second substrate 12B. In addition, the mobile wireless device 1 according to the present embodiment includes the first substrate 12A and the second substrate 12B as two substrates, but may include three or more substrates.

  The processor 19 is an IC for wireless communication. The processor 19 performs various signal processing on a high-frequency signal (hereinafter also referred to as an RF (Radio Frequency) signal) transmitted and received via an antenna, and functions as a smartphone of the mobile wireless device 1 (for example, a call function and a data transmission / reception function). Etc.).

  The battery 13 is disposed between the first substrate 12A and the second substrate 12B. The battery 13 is a lithium ion battery, for example. As another example, the battery 13 may be a nickel cadmium battery or a nickel metal hydride battery. The battery 13 is connected to the first substrate 12 </ b> A by a battery connector 45.

  With reference to FIGS. 3-5, the structure of the plate-shaped part 20 is demonstrated in detail. An RF signal relay wiring 31 is formed on the first surface 21 of the plate-like portion 20. A first grounding member 32 is formed on the second surface 22 of the plate-like portion 20. Furthermore, a second grounding member 33 is formed on the first surface 21 of the plate-like portion 20. The relay wiring 31, the first grounding member 32, and the second grounding member 33 are formed by, for example, LDS (Laser Direct Structuring). Further, the second surface 22 of the plate-like portion 20 faces the battery 13.

  As shown in FIG. 4, the relay wiring 31 is formed on the first surface 21 of the plate-like part 20 so as to extend along the groove part 23. The relay wiring 31 electrically connects the signal wiring for RF signals on the first substrate 12A and the signal wiring for RF signals on the second substrate 12B. Specifically, as shown in FIG. 3, the relay wiring 31 is along the direction from the first substrate 12 </ b> A toward the second substrate 12 </ b> B on the bottom surface side (upper side in FIG. 3) of the first substrate 12 </ b> A and the second substrate 12 </ b> B. It is extended. Further, the relay wiring 31 is electrically connected to the signal wiring of the first substrate 12A via a conductive pin disposed in the vicinity of the pin 16A. The conductive pin disposed in the vicinity of the pin 16A is not electrically connected to the first ground member 32. Further, the relay wiring 31 is electrically connected to the signal wiring of the second substrate 12B through a conductive pin disposed in the vicinity of the pin 16B. The conductive pin disposed in the vicinity of the pin 16B is not electrically connected to the first grounding member 32.

  As shown in FIG. 3, the first grounding member 32 is formed so as to extend along the extending direction of the relay wiring 31. The first ground member 32 connects the ground wiring of the first substrate 12A and the ground wiring of the second substrate 12B. Specifically, the first ground member 32 is connected to the ground wiring of the first substrate 12A through the pin 16A. The first ground member 32 is connected to the ground wiring of the second substrate 12B via the pin 16B.

  The second ground member 33 is formed so as to extend along the extending direction of the relay wiring 31 on both sides of the relay wiring 31. The second ground member 33 is electrically connected to the first ground member 32. Specifically, as shown in FIG. 4, the second grounding member 33 is connected to the first grounding member 32 via through holes 35 and 36 formed in the plate-like portion 20.

  Thus, in the mobile wireless device 1 according to the present embodiment, the relay wiring 31 that electrically connects the signal wiring of the first substrate 12A and the signal wiring of the second substrate 12B to the plate-like portion 20 of the resin casing 11. Is formed. A first grounding member 32 is formed along the extending direction of the relay wiring 31 on the surface of the plate-like portion 20 facing the battery 13 on the side opposite to the relay wiring 31. Thus, the relay wiring 31 is protected while the battery 13 side is shielded by the first grounding member 32. Therefore, even if the battery 13 expands due to a change with time, the influence of the expansion on the signal propagation to the relay wiring 31 can be reduced. Moreover, since the portable radio | wireless apparatus 1 which concerns on this embodiment is piled up in the up-down direction of the battery 13, while being able to contribute to size reduction, it can also contribute to size enlargement of the battery 13.

  In the portable wireless device 1 according to the present embodiment, the second grounding member 33 is formed so as to extend along the extending direction of the relay wiring 31 on both sides of the relay wiring 31. Therefore, since the relay wiring 31 is shielded also in the left-right direction by the second grounding member 33, the influence of noise on the RF signal and the loss due to reflection on the relay wiring 31 can be reduced.

  Incidentally, as shown in FIG. 6, the through holes 35 and 36 may be arranged at a plurality of locations on both sides of the relay wiring 31 along the extending direction of the relay wiring 31. As a result, the relay wiring 31 is further shielded in the left-right direction by the conductors in the through holes 35 and 36, so that the influence of noise on the RF signal and loss due to reflection can be further reduced. FIG. 6 shows an example in which the through holes 35 and 36 are arranged at equal intervals symmetrically with respect to the extending direction of the relay wiring 31. The through holes 35 and 36 may be arranged alternately, for example, or may be arranged at unequal intervals.

(Second Embodiment)
The portable wireless device 1 according to the second embodiment further includes a metal sheet 34 in addition to the same configuration as the portable wireless device 1 according to the first embodiment. As shown in FIG. 7, the metal sheet 34 is disposed across the second ground members 33 on both sides of the relay wiring 31. Further, the metal sheet 34 extends along the extending direction of the relay wiring 31. The metal sheet 34 is grounded by being connected to the second grounding member 33.

  Thus, in the mobile wireless device 1 according to the present embodiment, the metal sheet 34 is disposed across the second ground members 33 on both sides of the relay wiring 31 and extends along the extending direction of the relay wiring 31. ing. Therefore, since the bottom surface side of the relay wiring 31 is also shielded by the metal sheet 34, the influence of noise and loss due to reflection can be further reduced. Further, since the bottom surface side of the relay wiring 31 is covered with the metal sheet 34, for example, when the resin casing 11 is removed, it is possible to prevent the user from directly touching the relay wiring 31.

(Other embodiments)
Although the present invention has been described based on the drawings and embodiments, it should be noted that those skilled in the art can easily make various variations and modifications based on the present disclosure. Therefore, it should be noted that these variations and modifications are included in the scope of the present invention. For example, each component can be rearranged so as not to be logically contradictory, and a plurality of components can be combined into one or divided.

  For example, in the first embodiment, the second ground member 33 may not be formed on the plate-like portion 20. In this case, the plate-like portion 20 may not be provided with the through holes 35 and 36.

In the second embodiment, the mobile wireless device 1 may include any sheet member that is not limited to metal instead of the metal sheet 34. Even in such a configuration, since the bottom surface side of the relay wiring 31 is covered by the sheet member, it is possible to prevent the user from directly touching the relay wiring 31 when the resin casing 11 is removed, for example.

DESCRIPTION OF SYMBOLS 1 Portable radio | wireless apparatus 10 Rear cover 11 Resin housing | casing 12A 1st board | substrate 12B 2nd board | substrate 13 Battery 14 Display 15 Front cover 16A, 16B Pin 19 Processor 20 Plate-shaped part 21 1st surface 22 2nd surface 23 Groove part 31 Relay wiring 32 1st 1 ground member 33 second ground member 34 metal sheet 35 through hole 36 through hole 45 battery connector

Claims (5)

A first substrate;
A second substrate spaced apart from the first substrate;
A housing having a plate-like portion disposed between the first substrate and the second substrate;
A battery disposed between the first substrate and the second substrate,
On the first surface of the plate-like portion, a relay wiring that electrically connects the signal wiring of the first substrate and the signal wiring of the second substrate is formed,
On the second surface opposite to the first surface of the plate-like portion, the ground wiring of the first substrate and the ground wiring of the second substrate are connected along the extending direction of the relay wiring. A first grounding member is formed,
The mobile wireless device, wherein the second surface of the plate-shaped portion faces the battery.   A second grounding member electrically connected to the first grounding member is formed on the first surface of the plate-like portion along the extension direction of the relay wiring on both sides of the relay wiring. The portable wireless device according to claim 1.   The portable radio apparatus according to claim 2, further comprising a sheet member disposed across the second grounding member on both sides of the relay wiring and extending along an extending direction of the relay wiring.   The portable wireless device according to claim 3, wherein the sheet member is a metal sheet.   5. The device according to claim 1, wherein the first grounding member and the second grounding member are electrically connected to each other at a plurality of locations on both sides of the relay wiring along the extending direction of the relay wiring. The portable wireless device according to one item.

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