JP2011044778A - Portable radio equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide portable radio equipment capable of utilizing an existing conductive part as an antenna to expand a range in which communication with a counter machine is possible, without enlarging the equipment, wherein the counter machine is a communications partner of non-contact radio communication. <P>SOLUTION: The portable radio equipment 1 includes a second case 3 turnable through a first case 4 and a hinge coupling 2. The first case 4 includes a loop antenna 10, a communication circuit 12, a conductive member 9, a first switch circuit 13, and a second switch circuit 14. The conductive member 9 is prepared at a position where it does not overlap with the loop antenna 10 in the case thickness direction. The first switch circuit 13 switches electric connection of the loop antenna 10 to the communication circuit section 12. The second switch circuit 14 switches electric connection of the conductive member 9 to the communication circuit section 12. According to the arrangement, the conductive member 9 is operated as an antenna. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a portable wireless device such as a cellular phone which is a device with a built-in RFID.

  RFID (Radio Frequency Identification) systems are generally used for electronic money and the like. Communication between a portable wireless device such as a mobile phone that is an RFID built-in device and a reader / writer (R / W) that is a fixed device placed in a store or the like is performed by wireless communication using electromagnetic induction (inductive coupling).

  As a conventional example 1, FIG. 6 shows an RFID built-in mobile phone 101 (hereinafter referred to as a mobile phone 101). 6A is a cross-sectional view of the mobile phone 101, and FIG. 6B is a plan view of the mobile phone 101 viewed from the back side (X-axis direction) of the lower housing 104. FIG.

  As shown in FIG. 6A, the mobile phone 101 includes upper and lower casings 103 and 104 that are hinged to be freely opened and closed by a rotating shaft 102. The lower housing 104 includes a battery unit 107 positioned on the lower end side opposite to the rotation shaft 102 and a communication unit 108 positioned on the upper end side near the rotation shaft 102 along the Z-axis direction in the drawing. With.

  6B, the communication unit 108 includes a loop antenna 110, an RFID communication circuit unit 111 connected to the loop antenna 110, and a switch connected to the communication circuit unit 111 and the loop antenna 110. Circuit 109.

  The mobile phone 101 changes the terminal load of the loop antenna 110 by the switch circuit 109, thereby creating a difference of electromagnetic induction in the loop antenna 110 (ASK modulation), and performs communication with the reader / writer.

  A communication method between the mobile phone 101 and the reader / writer (R / W) 30 will be described with reference to FIGS. 7 (a) and 7 (b). 7A shows a state in which communication is possible between the mobile phone 101 and the reader / writer (R / W) 30, and FIG. 7B shows a state in which the mobile phone 101 and the reader / writer (R / W) 30 are connected. It is a figure which shows the state which cannot communicate between.

  In the communication method using electromagnetic induction, communication is not possible unless the distance between the antennas of the mobile phone 101 and the reader / writer 30 is such that the degree of coupling between both antennas can be maintained at a predetermined level or more. Therefore, as shown in FIG. 7A, when the loop antenna 110 of the mobile phone 101 is opposed to the antenna 31 of the reader / writer 30 in the X-axis direction in the figure, the degree of coupling between both antennas is low. The mobile phone 101 and the reader / writer 30 can communicate with each other because they are larger than the predetermined size. On the other hand, as shown in FIG. 7B, when the loop antenna 110 of the mobile phone 101 is not facing away from the antenna 31 of the reader / writer 30 in the Z-axis direction in the figure, the degree of coupling between both antennas is The mobile phone 101 and the reader / writer 30 cannot communicate with each other because the power does not maintain a predetermined size.

  Therefore, in order to avoid communication failure due to a decrease in the coupling degree of the antenna as described above, a mobile phone 101A having an antenna configuration as shown in FIG. 8 has been proposed as Conventional Example 2 (see Patent Document 1). reference). FIG. 8 is a diagram showing the configuration of the antenna of the mobile phone 101A. In FIG. 8, the same reference numerals are given to components common to the mobile phone 101 shown in FIG. 6, and description thereof is omitted.

  As shown in FIG. 8, the lower casing 104 is provided with another loop antenna 113 at the end opposite to the rotating shaft 102 in the z-axis direction in the figure. Therefore, the cellular phone 101A switches the terminal loop load of the second loop antenna 113 by the switch circuit 112 in synchronization with the load modulation of the first loop antenna 110 by the switch circuit 109, so Communication is performed using the antenna 113.

JP 2004-29873 A

  Here, with reference to FIG. 9, a state in which the mobile phone 101A communicates with the reader / writer 30 will be described. FIG. 9 is a diagram illustrating a state in which the mobile phone 101A can communicate with the reader / writer 30. As shown in FIG. 9, the mobile phone 101 </ b> A includes a reader / writer with another loop antenna 113 facing relatively close to the antenna 31 even when the loop antenna 110 is separated from the antenna 31 along the z-axis direction in the figure. 30 can communicate. However, the cellular phone 101A is increased in size as the other loop antenna 113 is arranged.

  An object of the present invention is to provide a portable wireless device that can expand the range of communication with a counterpart device that is a communication partner of non-contact wireless communication without increasing the size by using an existing conductive component as an antenna. It is to be.

The portable wireless device of the present invention is relative to the first housing and the second direction substantially orthogonal to the first direction with respect to the first housing via the hinge portion. A portable wireless device comprising a second housing that is pivotable to the first housing, wherein the first housing is electrically connected to the loop antenna and performs non-contact wireless communication with an external device. A communication circuit unit for controlling, a conductive member that is electrically connected to the communication circuit unit, and is provided at a position that does not overlap the loop antenna in the thickness direction of the housing, and electrically connected to the communication circuit unit A first switch circuit that switches electrical connection of the loop antenna to the communication circuit unit, and a second switch that is electrically connected to the communication circuit unit and switches electrical connection of the conductive member to the communication circuit unit. A switching circuit, and the communication circuit The switching control of the second switch circuit performs load modulation that changes the terminal load of the conductive member in synchronization with load modulation that changes the terminal load of the loop antenna by switching control of the first switch circuit. By performing the above, the conductive member functions as an antenna.
According to the above configuration, by using a conductive member that is an existing conductive component as an antenna, it is possible to communicate with a counterpart device that is a communication partner of non-contact wireless communication without increasing the size of the portable wireless device itself. Range can be expanded.

As an aspect of the present invention, the conductive member is a battery lid that covers a battery portion in the second casing.
According to the above configuration, by using a battery lid, which is an existing conductive component, as an antenna, communication with a counterpart device that is a communication partner of non-contact wireless communication is possible without increasing the size of the portable wireless device itself. The range can be expanded.

As one aspect of the present invention, in the portable wireless device, the second housing is further positioned on the opposite side of the one surface in the thickness direction of the housing and the one surface provided with the conductive member. Another surface, and a detection unit that is electrically connected to the communication circuit unit and detects a relative position of the second case with respect to the first case, the first case having Furthermore, the one surface provided with the display unit, the other surface provided on the opposite side of the one surface in the thickness direction of the housing and provided with another conductive member, the conductive member, and the communication circuit A third switch circuit that is electrically connected to the communication circuit unit and switches the electrical connection of the conductive member to the communication circuit unit, and the detection unit is configured to include the second casing with respect to the first casing. As the relative position of the body, the one surface of the second housing faces the outside, and the other surface of the second housing is the housing. When detecting the closed state of the portable wireless device facing the one surface of the first casing in the thickness direction, the communication circuit unit terminates the loop antenna by switching control of the first switch circuit. The conductive member is caused to function as another antenna by performing load modulation that changes the terminal load of the conductive member in synchronization with load modulation that changes the load by switching control of the third switch circuit.
According to the above configuration, by using a conductive member that is an existing conductive component as an antenna, it is possible to communicate with a counterpart device that is a communication partner of non-contact wireless communication without increasing the size of the portable wireless device itself. Range can be expanded.

As one aspect of the present invention, the conductive member is a reinforcing plate that reinforces the strength of the first casing, and the other conductive member covers a battery portion provided in the two casings. It is a battery lid.
According to the above configuration, by using a reinforcing plate and a battery cover, which are existing conductive parts, as an antenna, without increasing the size of the portable wireless device itself, it is possible to communicate with a counterpart device that is a communication partner of non-contact wireless communication The communication range can be expanded.

  According to the portable wireless device of the present invention, by using an existing conductive component as an antenna, it is possible to expand a range in which communication with a counterpart device that is a communication partner of non-contact wireless communication is possible without increasing the size.

(A) Vertical sectional view of the mobile phone 1 (b) Plan view of the lower casing 4 of the mobile phone 1 as seen from the back side (A) The figure which shows an example of the state in which the mobile telephone 1 can communicate with the reader / writer 30 (b) The figure which shows the other example in the state in which the mobile telephone 1 can communicate with the reader / writer 30 (A) Diagram showing the opened state of the cellular phone 1A (b) Diagram showing the closed state (1) of the cellular phone 1A (c) Diagram showing (2) in the closed state of the cellular phone 1A The figure for demonstrating the structure of the lower housing | casing 44. (A) The figure which shows the 1st relative position of the upper housing | casing 43 with respect to the lower housing | casing 44 (b) The figure which shows the 2nd relative position of the upper housing | casing 43 with respect to the lower housing | casing 44 (A) Cross-sectional view of the mobile phone 101 (b) Plan view of the mobile phone 101 viewed from the back side (X-axis direction) of the lower housing 104 (A) The figure which shows the state which can communicate between the mobile telephone 101 and the reader / writer 30 (b) The figure which shows the state which cannot communicate between the mobile telephone 101 and the reader / writer 30 The figure for demonstrating the structure of the antenna of the mobile telephone 101A The figure which shows the state in which the mobile telephone 101A can communicate with the reader / writer 30

(Embodiment)
With reference to FIG. 1 and FIG. 2, a mobile phone 1 will be described as an embodiment of the wireless portable device of the present invention. 1A is a cross-sectional view of the mobile phone 1, and FIG. 1B is a plan view of the lower casing 4 of the mobile phone 1 viewed from the back side. A mobile phone 1 shown in FIG. 1 includes upper and lower casings 3 and 4 that are coupled with a hinge portion 2 so as to be relatively rotatable.

  The mobile phone 1 has a hinge portion 2, a first open state in which the upper housing 3 rotates relative to the lower housing 4 in the direction of arrow A in FIG. The closed state in which the upper case 3 is closed with respect to the lower case 4 as shown in FIG. 1A, and the upper case with respect to the lower case 4 from the state in FIG. 3 is in a second open state in which it relatively rotates in the direction of arrow Y in FIG.

  As shown in FIG. 1A, a display unit 5 having a liquid crystal panel or the like is provided on a surface facing the lower housing 4 of the upper housing 3, and a surface facing the upper housing 3 of the lower housing 4 is An operation unit 6 having various operation buttons and operation keys is provided.

  As shown in FIG. 1A, a battery unit 7 covered with a battery lid 9 and a communication unit 8 are provided on a back surface part 4A opposite to the operation unit 6 of the lower casing 4 (X-axis direction in the figure). And are provided. The communication unit 8 is provided at the end of the lower housing 4 near the hinge 2, and the battery unit 7 is provided at the end opposite to the hinge 2 in the Z-axis direction in FIG. It has been.

  As shown in FIG. 1A, the communication unit 8 is provided immediately below the back surface portion 4 </ b> A of the lower housing 4, and includes a loop antenna 10 and a communication circuit unit 12 attached to a circuit board 11 in the lower housing 4. The first switch circuit 13 and the second switch circuit 14 are provided as load switching units.

  The loop antenna 10 forms a winding at a position close to the peripheral edge of the base on the base of the required plastic material. The entire surface of the substrate surrounded by the windings functions as the loop antenna 10.

  As shown in FIG. 1B, the communication circuit unit 12 is connected to one open end of the loop antenna 10 via a contact spring 15a, and connected to the other open end of the loop antenna 10 via a contact spring 15b. Has been. The communication circuit unit 12 is connected to the first switch circuit 13 and the second switch circuit 14. The communication circuit unit 12 controls switching between the first switch circuit 13 and the second switch circuit 14.

  As shown in FIG. 1A, the battery lid 9 is formed in a planar shape and covers the battery unit 7. As shown in FIG. 1B, the battery lid 9 forms a back surface portion 4 </ b> A of the lower housing 4. The battery lid 9 is located on the same surface side at a position that does not overlap the loop antenna 10 in the thickness direction of the lower housing 4 (X-axis direction in FIG. 1A).

  Here, in the mobile phone 1, the battery lid 9, which is an existing component, is made of a conductive member in order to function as an antenna. That is, the mobile phone 1 includes other antennas configured by the battery lid 9 in addition to the loop antenna 10 in order to communicate with the counterpart device that is the partner of the contactless wireless communication.

  As shown in FIG. 1B, on the back surface 4A side of the lower housing 4, the entire surface of the base body forming the loop antenna 10 and the entire back surface 4A side of the lower housing 4 of the battery lid 9 are 2 covers almost the entire back surface of the lower casing 4 except for 2.

  As shown in FIG. 1B, the battery lid 9 is connected to a second switch circuit 14 provided in the communication unit 8 via a contact spring 16. In order to connect the battery lid 9 to the second switch 14, the connection may be made by capacitive coupling using the capacitance (capacitor) of the battery lid 9 without using connection parts such as the contact spring 16.

  As shown in FIG. 1B, the first switch circuit 13 includes a termination load unit 13a and an opening unit 13b, and the loop antenna 10 is connected to the termination load unit 13a and the opening unit under the control of the communication circuit unit 12. The load modulation for changing the termination load of the loop antenna 10 is performed by switching between the switch 13b and 13b. As a result, the mobile phone 1 can perform non-contact communication with the reader / writer via the loop antenna 10.

  As shown in FIG. 1B, the second switch circuit 14 includes a termination load portion 14a and an open portion 14b. The second switch circuit 14 switches the connection of the battery cover 9 between the terminal load part 14 a and the open part 14 b in synchronization with the load modulation of the loop antenna 10 under the control of the communication circuit part 12. Therefore, the second switch circuit 14 can perform load modulation that changes the terminal load of the battery lid 9. Therefore, the battery lid 9 has the same antenna function as the loop antenna 10.

  As described above, on the back surface 4A side of the lower housing 4, the entire surface of the base body forming the loop antenna 10 and the entire back surface 4 </ b> A side of the lower housing 4 of the battery lid 9 exclude the hinge portion 2. It covers almost the entire back surface of the lower housing 4 (see FIG. 1B). Therefore, by using the existing battery cover 9 as an antenna, the loop antenna 10 is formed in a range in which communication with a reader / writer that is a communication partner of non-contact wireless communication is possible without increasing the size of the mobile phone 1 itself. It is possible to enlarge not only the entire surface of the substrate to be processed but also the entire back surface side of the lower housing 4 of the battery lid 9.

  Here, an example of a state in which the mobile phone 1 can communicate with the reader / writer 30 will be described with reference to FIG. FIG. 2A is a diagram illustrating an example of a state in which the mobile phone 1 can communicate with the reader / writer 30, and FIG. 2B illustrates another example of a state in which the mobile phone 1 can communicate with the reader / writer 30. FIG.

  As shown in FIG. 2A, when the loop antenna 10 of the mobile phone 1 faces the antenna 31 of the reader / writer 30 at a relatively close position in the Z-axis direction in the figure, the degree of coupling between the two antennas is not less than a predetermined value. Because of the size, the mobile phone 1 and the reader / writer 30 can perform non-contact wireless communication.

  Even if the loop antenna 10 of the mobile phone 1 is located away from the antenna 31 of the reader / writer 30 in the Z-axis direction in the figure, as shown in FIG. Since at least a part of the back side faces the antenna 31 of the reader / writer 30 at a relatively close position in the Z-axis direction in the figure, the degree of coupling between the two antennas is greater than a predetermined level. Then, non-contact wireless communication is possible.

  As described above, in this embodiment, by using the battery lid 9 which is an existing part as an antenna, communication with the reader / writer 30 which is a communication partner of non-contact wireless communication is possible without increasing the size of the mobile phone 1 itself. The range can be expanded not only to the entire surface of the base body forming the loop antenna 10 but also to the entire back side of the lower housing 4 of the battery lid 9.

  Here, in the present embodiment, the battery lid 9 which is an existing component has an antenna function, so that the range in which communication with the reader / writer 30 which is a communication partner of non-contact wireless communication is possible is expanded. The existing component having the function is not limited to the battery lid 9.

(Other embodiments)
Therefore, in another embodiment of the present invention, an example will be described in which a conductive plate member that reinforces the casing is provided with an antenna function as an existing component other than the battery lid 9.

  With reference to FIG. 3 and FIG. 4, a mobile phone 1A will be described as a portable wireless device according to another embodiment of the present invention. FIG. 3 is a perspective view of the mobile phone 1A, and FIG. 3A is a diagram showing an open state of the mobile phone 1A. FIG. 3B shows the closed state (1) of the mobile phone 1A, and FIG. 3C shows the closed state (2) of the mobile phone 1A. A cellular phone 1 </ b> A shown in FIG. 3 includes an upper casing 43 coupled by a biaxial hinge coupling unit 60 and a lower casing 44.

  In the open state shown in FIG. 3A, a main display unit 61 made of a liquid crystal panel or the like is provided on the surface facing the lower casing 44 of the upper casing 43. Further, as shown in FIG. 3B, a sub display unit 62 made of a liquid crystal panel or the like is provided on the back side opposite to the main display unit 61 of the upper casing 3. The sub display unit 62 may not be provided. An operation unit 46 having various operation buttons and operation keys is provided on a surface facing the upper housing 43 of the lower housing 44.

  As shown in FIG. 3A, the upper housing 43 can be rotated around the rotation axis of the axis A <b> 1 of the biaxial hinge coupling portion 60 with respect to the lower housing 44. Further, the upper housing 43 can be rotated around the rotation axis of the axis A <b> 2 in a direction substantially perpendicular to the axis A <b> 1 with respect to the lower housing 44.

  Since the mobile phone 1A includes two rotation shafts, the mobile phone 1A takes two closed states (1) and (2) as shown in FIGS. 3 (b) and 3 (c). In the closed state (1) illustrated in FIG. 3B, the sub display unit 62 is provided on the back surface portion facing the outside of the upper housing 43. Then, from the closed state (1) shown in FIG. 3 (b), one of the upper and lower casings 43, 44, for example, the upper casing 43 is rotated outward around the rotation axis of the axis A1 of the biaxial hinge coupling portion 60. Then, the upper and lower housings 43 and 44 are opened. Further, when the upper casing 43 is rotated 180 degrees around the rotation axis of the axis A2 from a state opened at a certain angle, the front and back of the upper casing 43 can be reversed. Then, by rotating the upper housing 43 inwardly around the rotation axis of the axis A1 from the state where the front and back are reversed, the front and back of the upper housing 43 is reversed in the closed state (2) shown in FIG. The upper and lower housings 43 and 44 can be folded in a posture.

  Next, the configuration of the lower housing 44 will be described with reference to FIG. FIG. 4 is a diagram for explaining the configuration of the lower housing 44. As shown in FIG. 4, a battery unit 47 covered with a battery lid 49 and a communication unit are provided on the back side of the lower casing 44 opposite to the front side where the operation unit 46 is provided (X-axis direction in the figure). 48 is provided. The communication unit 48 is provided at the end near the biaxial hinge coupling portion 60 in the Z-axis direction in the figure, and the battery unit 47 is provided at the end opposite to the biaxial hinge coupling unit 60 in the Z-axis direction in the figure. ing.

  As shown in FIG. 4, the communication unit 48 includes a loop antenna 50 provided immediately below the back surface of the lower housing 44, an RFID communication circuit unit 52 attached to a circuit board 51 in the lower housing 44, and a first switch. A circuit 53, a second switch circuit 54, and a third switch circuit 57 are provided.

  The loop antenna 50 forms a winding at a position close to the peripheral edge of the base on the base of the required plastic material. The entire surface of the substrate surrounded by the windings functions as the loop antenna 50. The loop antenna 50 is located directly below the back surface of the lower housing 44 and does not overlap the battery lid 49 in the thickness direction of the lower housing 44 (X-axis direction in FIG. 4).

  As shown in FIG. 4, the communication circuit unit 52 is connected to one open end of the loop antenna 50 through a contact spring 55a, and is connected to the other open end of the loop antenna 10 through a contact spring 55b. . The communication circuit unit 52 is connected to the first switch circuit 53, the second switch circuit 54, and the third switch circuit 57. The communication circuit unit 52 controls switching of the first switch circuit 53, the second switch circuit 54, and the third switch circuit.

  As shown in FIG. 4, the battery lid 49 is formed in a substantially planar shape, similar to the battery lid 9, and covers the battery portion 47. The battery lid 49 forms a part of the back surface of the lower housing 44. The battery lid 49 does not overlap the loop antenna 50 in the thickness direction of the lower housing 44 (X-axis direction in FIG. 4).

  As shown in FIG. 4, the entire back surface of the lower housing 44 has a base body that forms the loop antenna 50 and the entire battery lid 49 that forms a part of the back surface of the lower housing 44. It covers almost the entire back surface of the lower housing 44 excluding the portion 60. Here, in the cellular phone 1A, the battery lid 49, which is an existing component, is formed of a conductive member in order to function as an antenna. That is, the mobile phone 1A includes other antennas including the battery lid 9 in addition to the loop antenna 50 in order to communicate with the opposite device that is the partner of the contactless wireless communication.

  As shown in FIG. 4, the battery lid 49 is connected to a second switch circuit 54 provided in the communication unit 48 via a contact spring 56. Note that the battery lid 49 may be connected to the second switch 54 by capacitive coupling using a capacity (capacitor) of the battery lid 49 without using connection parts such as the contact spring 56.

  As shown in FIG. 4, the first switch circuit 53 includes a termination load unit 53a and an opening unit 53b, and the loop antenna 50 is connected between the termination load unit 53a and the opening unit 53b under the control of the communication circuit unit 52. The load modulation for changing the termination load of the loop antenna 50 is performed. Thereby, the cellular phone 1 </ b> A can perform non-contact communication with the reader / writer via the loop antenna 50.

  As shown in FIG. 4, the second switch circuit 54 includes a terminal load portion 54 a and an open portion 54 b. The second switch circuit 54 switches the connection of the battery cover 49 between the terminal load part 54 a and the open part 54 b in synchronization with the load modulation of the loop antenna 50 under the control of the communication circuit part 52. Therefore, the second switch circuit 54 can perform load modulation that changes the terminal load of the battery lid 49. Therefore, the battery lid 49 has the same antenna function as the loop antenna 50, and non-contact communication with the reader / writer is possible via the battery lid 49.

  As described above, in other embodiments of the present invention, as in the embodiment of the present invention, on the back side of the lower housing 44, the entire surface of the base on which the loop antenna 50 is formed and the lower housing 44 of the battery lid 49. The entire back side covers the entire back surface of the lower housing 44 excluding the hinge coupling portion 60 (see FIG. 4). Therefore, by using the existing battery cover 49 as an antenna, the loop antenna 50 is formed in a range in which communication with a reader / writer that is a communication partner of non-contact wireless communication is possible without increasing the size of the mobile phone 1A itself. It is possible to enlarge not only the entire surface of the substrate to be processed but also the entire back surface side of the lower housing 44 of the battery lid 49.

  Further, the communication circuit unit 52 is connected to a detection plate 80 and a conductive metal reinforcing plate 64 (hereinafter referred to as a part of the back surface of the upper housing 43) through a third switch circuit 57 through a conductive path (not shown). , Described as a reinforcing plate 64). The reinforcing plate 64 maintains the strength of the entire upper housing 43 and supports a substrate constituting the sub screen 62.

  Here, the third switch circuit 57 provided in the lower housing 44 passes through the hinge connection portion 60 and is connected to the reinforcing plate 64 provided in the upper housing 43 through a conductive path (not shown). The third switch circuit 57 includes a terminal load portion 57a and an open portion 57b. The third switch circuit 57 switches the connection of the reinforcing plate 64 between the terminal load portion 57a and the open portion 57b under the control of the communication circuit unit 52 based on the detection result of the detecting unit 80 described later. Perform load modulation to change the termination load. Thereby, the cellular phone 1A can perform non-contact communication with the reader / writer via the reinforcing plate 64 functioning as an antenna. That is, whether the reinforcing plate 64 functions as an antenna by the communication circuit unit 52 controlling the third switch circuit 57 based on the relative position of the upper housing 43 with respect to the lower housing 44 detected by the detection unit 80. Please decide.

  Hereinafter, the operation of the detection unit 80 due to a change in the relative position of the upper housing 43 with respect to the lower housing 44 will be described with reference to FIG. FIG. 5A is a diagram illustrating a first relative position of the upper housing 43 with respect to the lower housing 44, and FIG. 5B illustrates a second relative position of the upper housing 43 with respect to the lower housing 44. FIG.

  As shown in FIG. 5A, in the x-axis direction (or the thickness direction of the upper housing 43) in the drawing, a reinforcing plate 64 is provided on the back surface portion of the upper housing 43 facing the outside.

As shown in FIG. 5A, the biaxial hinge coupling unit 60 is provided with a detection unit 80 that detects the relative position of the upper housing 43 with respect to the lower housing 44.

  The detection unit 80 includes a plurality of magnets and a magnetic sensor. The detection unit 80 detects a change in the lines of magnetic force of the magnet due to a change in the relative position of the upper housing 43 with respect to the lower housing 44, and detects a relative position of the upper housing 43 with respect to the lower housing 44. There are two relative positions of the upper housing 43 with respect to the lower housing 44 depending on the closed state of the cellular phone 1A shown in FIGS. 3 (b) and 3 (c).

  First, at the first relative position of the upper housing 43 with respect to the lower housing 44 shown in FIG. 5A, the back surface portion of the upper housing 43 provided with the reinforcing plate 64 faces the outside. This corresponds to the closed state (1) shown in FIG. Further, in the second relative position of the upper casing 43 with respect to the lower casing 44 shown in FIG. 5B, the back side of the upper casing 3 provided with the reinforcing plate 64 does not face the outside, and the main display section The front side of the upper housing 43 provided with 61 faces the outside. This corresponds to the closed state (2) shown in FIG.

  Here, when the detection unit 80 detects the first relative position (see FIG. 5A) of the upper housing 43 with respect to the lower housing 44, the first switch circuit 53 is controlled by a control signal from the communication circuit unit 52. In synchronization with the load modulation of the loop antenna 50, the third switch circuit 57 performs load modulation that changes the terminal load of the reinforcing plate 64. Therefore, the reinforcing plate 64 functions as an antenna.

  On the other hand, when the detection unit 80 detects the second relative position (see FIG. 5B) of the upper housing 43 with respect to the lower housing 44, the third switch circuit 57 is controlled by a control signal from the communication circuit unit 52. Load modulation that changes the terminal load of the reinforcing plate 64 is not performed. This is because, as shown in FIG. 5B, the back side of the upper housing 43 provided with the reinforcing plate 64 faces the front surface of the lower housing 44 and does not face the outside. This is because it cannot function as an antenna.

  As described above, when the upper housing 43 is in the first relative position (see FIG. 5A) with respect to the lower housing 44, the rear surface side of the upper housing 43 performs the contactless wireless communication. The reinforcing plate 64 functions as an antenna facing the side reader / writer (R / W). Therefore, the cellular phone 1A can perform non-contact wireless communication with the reader / writer (R / W) via the reinforcing plate 64 that functions as an antenna.

  As described above, in the present embodiment, not only the battery lid 49 functions as an antenna, but also the existing part is controlled by the control of the communication circuit unit 12 based on the detection result of the relative position of the upper housing 43 with respect to the lower housing 44 by the detection unit 80. The reinforcing plate 64 is also made to function as an antenna. Therefore, the range in which communication with the reader / writer, which is a communication partner of non-contact wireless communication, can be performed without increasing the size of the mobile phone 1 is performed not only on the entire surface of the base on which the loop antenna 50 is formed, but also below the battery lid 49. It can be expanded to the entire rear surface side of the housing 44 and the back surface portion of the upper housing 43 provided with the reinforcing plate 64.

  In each of the above embodiments, the cellular phone has been described as an example. However, the present invention is not limited to this, and can be applied to a portable wireless device such as a portable information terminal, and has similar effects.

DESCRIPTION OF SYMBOLS 1, 1A cellular phone 2 Hinge coupling | bond part 3, 43 Upper housing | casing 4, 44 Lower casing 7, 47 Battery part 9, 49 Battery cover 10, 50 Loop antenna 12, 52 Communication circuit part 53, 54, 57 Switch circuit 60 2 Axis hinge joint 64 Reinforcing plate

Claims (4)

A first housing and a second housing that is rotatable relative to the first housing in a first direction and a second direction substantially orthogonal to the first direction via a hinge portion. A portable wireless device consisting of a body,
The first housing is
A loop antenna,
A communication circuit unit that is electrically connected to the loop antenna and performs control for performing contactless wireless communication with an external device;
Electrically connected to the communication circuit unit, and a conductive member provided at a position that does not overlap with the loop antenna in the casing thickness direction;
A first switch circuit that is electrically connected to the communication circuit unit and switches electrical connection of the loop antenna to the communication circuit unit;
A second switch circuit that is electrically connected to the communication circuit unit and switches the electrical connection of the conductive member to the communication circuit unit;
The communication circuit unit is
Performing load modulation for changing the terminal load of the conductive member by switching control of the second switch circuit in synchronization with load modulation for changing the terminal load of the loop antenna by switching control of the first switch circuit. The portable wireless device is characterized in that the conductive member functions as an antenna. The portable wireless device according to claim 1,
The conductive member is a portable wireless device that is a battery lid that covers a battery unit in the second casing. The portable wireless device according to claim 1, wherein
The second housing further includes:
One surface provided with a conductive member;
In the casing thickness direction, the other surface located on the opposite side of the one surface,
A detection unit that is electrically connected to the communication circuit unit and detects a relative position of the second casing with respect to the first casing;
The first casing further includes one surface provided with a display unit;
Another surface provided on the opposite side of the one surface in the thickness direction of the housing and provided with another conductive member;
A third switch circuit that is electrically connected to the conductive member and the communication circuit unit and switches the electrical connection of the conductive member to the communication circuit unit;
The detection unit is
As the relative position of the second housing with respect to the first housing, the one surface of the second housing faces the outside, and the other surface of the second housing When detecting the closed state of the portable wireless device facing one surface of the first casing in the casing thickness direction,
The communication circuit unit is
The load modulation for changing the terminal load of the conductive member is performed by the switching control of the third switch circuit in synchronization with the load modulation for changing the terminal load of the loop antenna by the switching control of the first switch circuit. A portable wireless device that causes the conductive member to function as another antenna. The portable wireless device according to claim 3, wherein
The conductive member is a reinforcing plate that reinforces the strength of the first housing,
The other conductive member is a portable wireless device that is a battery lid that covers a battery portion provided in the two cases.

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