JP2008301112A - Electronic apparatus and package of battery terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To promote furthermore miniaturization and thinning of an electronic apparatus, to stabilize an antenna, and to facilitate designing and reduce development man-hours. <P>SOLUTION: The electronic apparatus includes a wireless tag (RFID), including a loop antenna 71 and a wireless circuit 45 and has a battery terminal 600, to which a battery 60 is connected, mounted on a substrate 30, and the battery terminal 600 has a grounding terminal structure which connects a grounding terminal 60b of the battery 60, a grounding terminal 30b of the substrate 30 having the wireless circuit 45 mounted thereon, and a grounding terminal 71b of the loop antenna 71. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electronic device and a battery terminal mounting body on which a wireless tag including, for example, an antenna and a wireless circuit is mounted.

  Due to advances in information and communication technology, the development of electronic devices such as mobile phones is remarkable, and abundant functions are added year by year, and the market is flourishing. Among the mobile phones described above, there are models equipped with a communication function using a wireless tag such as an RFID (Radio Frequency Identifier) (for example, see Patent Document 1). A mobile phone capable of communication using the above-described wireless tag is connected to a wireless circuit (IC chip) on which a loop antenna is mounted on a substrate. Usually, as shown in FIG. Connected.

  The loop antenna 110 transmits and receives information using radio waves having a specific frequency generated by electromagnetic induction. Therefore, in order to ensure the accuracy of data communication, the L component and C component of the loop antenna 110 must be precise. Specifically, the antenna line length is a very important design issue.

In addition, as shown in FIG. 17, loop antenna 110 has one of two end portions grounded and the other end connected to radio circuit 130 mounted on substrate 120. Further, in the radio circuit 130, the ground that serves as a reference is preferably the ground conductor (GND) that is most stable as the substrate 120. In the mobile phone driven by the battery 140, the ground conductor of the battery 140 is stable. It is preferable that the battery 140 be as close as possible to the grounded portion. The battery 140 has a power feeding terminal and a ground terminal, is connected to a battery terminal 150 mounted on the substrate 120, and is covered with a battery cover (not shown).
JP 2005-318229 A

In the conventional mobile phone shown in FIG. 17, conventionally, a connector 160 is required to connect the loop antenna 110 to the radio circuit 130 mounted on the substrate 120, and the number of parts increases. It was preventing the thinning.
Since the loop antenna 110 transmits and receives information using radio waves (electromagnetic waves) having a specific frequency generated by electromagnetic induction, the accuracy of information transmission and reception largely depends on the L and C components of the loop antenna 110. .

  Conventionally, however, there has been a restriction on component layout and the like due to miniaturization and thinning, and the ground terminal of the loop antenna 110 and the ground terminal of the battery 140 are often mounted at a distance. If the wiring is considered to be a wiring, the antenna length changes (increases the L component) depending on the distance, and there is a design inconvenience that a lot of time is required for the adjustment.

As shown in FIG. 18, the loop antenna 110 is formed on a battery cover or an antenna substrate (hereinafter referred to as an antenna substrate) 170 that covers a battery 140 that forms part of the casing of the mobile phone. A structure is adopted in which conduction is achieved by applying pressure to the pin contact 180.
For this reason, the way of applying pressure by the antenna substrate 170 is not uniform, and therefore, a change in parasitic capacitance due to a change in the distance between the loop antenna 110 and the substrate 120 on which the wireless circuit 130 is mounted can be considered.

  The present invention promotes further miniaturization and thinning, and achieves stability as an antenna, facilitates design, and contributes to reduction in development man-hours. It is to provide.

  The electronic device according to the first aspect of the present invention includes an antenna having a first terminal connected to the ground, a substrate on which a ground pattern is formed, a terminal for supplying power, and a second terminal connected to the ground. A battery having a terminal, and a battery terminal disposed on the substrate and having a connection means for electrically connecting the first terminal, the second terminal, and the ground pattern.

  Preferably, the connection means is in contact with the first terminal and electrically connects the ground pattern, and the second connection is in contact with the second terminal and electrically connects the ground pattern. It consists of parts.

  Preferably, the first connecting portion is a fixing member that fixes the battery terminal to the substrate.

  Preferably, the antenna is formed so as to face the mounting surface of the substrate on the inner side of the wall surface of the casing that forms the external appearance of the electronic device, and the second connection portion has a predetermined distance from the antenna forming surface of the casing. The first terminal or the first connection portion has elasticity, and maintains a predetermined distance between the antenna forming surface of the housing and the first connection portion. A spacer is arranged, and the first connecting portion applies a pressing elastic force in the outer direction of the housing to the first terminal, or the first terminal is a mounting surface of the substrate with respect to the first connecting portion. The elastic force which presses to the side is provided.

  Suitably, the 1st connection part has fixed the battery terminal to the board | substrate at two places.

  Preferably, the antenna further includes a third terminal connected to the electronic circuit, the electronic device including the wireless circuit connected to the third terminal and disposed on the substrate, wherein the third terminal and the wireless circuit are The battery terminal is electrically connected via a third connection portion disposed on the battery terminal.

  Suitably, the area of the part which the 1st connection part touches the 1st terminal is large compared with the other location of the 1st connection part.

  A battery terminal mounting body according to a second aspect of the present invention is a battery terminal mounting body including a substrate and a battery terminal attached to the substrate. The battery terminal includes a non-conductive member having a substantially rectangular parallelepiped shape, and a non-conductive body. Among the surfaces of the member, a part of the mounting surface, which is a surface mounted on the substrate, and a part of the first surface adjacent to the mounting surface are electrically connected to penetrate through the non-conductive member. It consists of a second connection portion to be formed, a second surface of the surface of the non-conductive member that faces the mounting surface, and a first connection portion that electrically connects the substrate.

  According to the present invention, further reduction in the size and thickness is promoted by eliminating the need for a dedicated connector for the loop antenna, and the development man-hour is reduced by the structural design that improves the stability and simplifies the design of the antenna. It is possible to provide an electronic device and a battery terminal mounting body that can contribute to the above.

  FIG. 1 is a front view showing an appearance of a mobile phone 1 as an electronic apparatus according to an embodiment of the present invention in an open state, and FIG. 2 is a side view showing the appearance of the mobile phone 1 in an open state. 3A is a front view showing the appearance of the mobile phone 1 in a closed state, and FIG. 3B is a rear view showing the appearance of the mobile phone 1 in a closed state.

The mobile phone 1 has a so-called foldable housing structure, and includes a receiving housing 2 and a transmitting housing 3 that are rotatably connected to each other between an open state and a closed state. .
The receiving housing 2 and the transmitting housing 3 form an entire housing as the mobile phone 1 by being connected by a connecting portion 4 whose ends are the centers of rotation.
The receiving housing 2 and the transmitting housing 3 are each formed in a generally thin rectangular parallelepiped shape, and are overlapped with each other in the closed state, and the outlines of the receiving housing 2 and the transmitting housing 3 are substantially the same when viewed from the other housing side. It is supposed to be.

In addition, the receiving housing 2 is in a closed state, the front side case 6 facing the transmitting housing 3, the back side case 7 on the back side, and the panel 8 attached to the back side of the back side case 7. And. The front side S1 facing the transmission case 3 in the closed state of the receiving case 2 is constituted by a front case 6, and the opposite rear side S 2 is constituted by a rear case 7 and a panel 8.
The front side case 6, the back side case 7, and the panel 8 are each formed of, for example, a nonconductive resin.

  A sound emitting hole 12 of a speaker for call (not shown) is opened in the front surface S1 of the receiving case 2. The receiving case 2 is provided with a main display unit 13 (display monitor) for displaying images and characters on the front surface S1, and a sub-display unit 14 (FIG. 3 (a)) for displaying images and characters on the back surface S2. ing. That is, the main display unit 13 is provided at a position hidden in the closed state, and the sub display unit 14 is provided at a position not hidden even in the closed state. The main display unit 13 and the sub display unit 14 are configured by a display device such as an LCD display device or an organic EL (Electro-Luminescence) display device.

  The panel 8 is translucent and also serves as a protective cover for the sub display unit 14. Further, a camera 20 is arranged on the inner side of the panel 8 with the back S2 side as the shooting direction.

  The transmitter case 3 includes a front case 9 on the side facing the receiver case 2 in the closed state, a back case 10 on the back side, and a lid 11 that covers the back side of the back case 10. It has. The front surface S3 facing the receiving housing 2 in the closed state of the transmitting housing 3 is constituted by a front case 9, and the back surface S4 on the opposite side is constituted by a back case 10 and a lid 11. The front side case 9, the back side case 10, and the lid body 11 are each formed of, for example, a non-conductive resin.

  Further, a battery 60 as a power supply means is built in the inside of the transmitter case 3 along a guide (not shown), and the battery 60 is covered with a battery cover 70 as a power supply case. The battery cover 70 is provided with a latch 81 at the peripheral end thereof, and engages with a groove (not shown) formed at a guide position inside the transmitter case 3 facing the latch 81 when the battery 60 is mounted. This prevents the battery 60 from being detached.

  Note that by applying a force in the direction indicated by the arrow A in FIG. 3B and releasing the latch 81, the battery cover 70 is opened and the battery 60 can be taken out. In addition, a micro switch (not shown) is mounted as a detecting means in the vicinity of the groove engaging with the latch 81, and the mounting / detaching of the battery 60 can be detected by the micro switch.

Further, on the back side of the battery cover 70, a loop antenna 71 (antenna in the claims) in which a metal conductor is wired in a coil shape is embedded or mounted, and as will be described later, as described later. When the battery is mounted in the housing, the battery cover 70 presses a spring or a pin contact so that the wireless circuit mounted on the substrate is electrically connected.
The loop antenna 71 can be formed as an antenna substrate not only on the battery cover but also on a part of the casing of the mobile phone facing the battery terminal mounting amount area inside the casing.

  On the other hand, a sound collecting hole 16 of a microphone for communication (not shown) is opened on the front surface S3 of the transmission housing 3, and a sound emitting hole 17 is closed on the rear surface S4 so as to be directed outwardly to a notification speaker (not shown). is doing. The transmitter case 3 is provided with an operation unit 18 including various keys exposed on the front surface S3. The various keys are, for example, dial key 18a, cursor key 18b, function key 18c, and enter key 18d. In addition, the transmitter case 3 is provided with a camera 20 having a photographing direction on the back S2 side and an infrared communication unit 21 dedicated to infrared light having a transmitting / receiving direction on the back S4 side.

The connecting portion 4 has a notch 27 formed at the end of the receiving case 2, a protruding portion 28 formed at the end of the transmitting case 3, and the protruding portion 28 fitted into the cut-out portion 27. It is pivotally supported and configured.
The notch 27 and the protrusion 28 are formed, for example, such that the width in the direction of the rotation axis (the left-right direction in FIG. 1) is about half the width of the receiving housing 2 and the transmitting housing 3. It is formed at the center in the width direction of the body 2 and the transmission housing 3. The protruding portion 28 protrudes from the front surface S <b> 3 of the transmitting housing 3 in a direction opposite to the receiving housing 2 in the closed state at a height similar to the thickness of the receiving housing 2.

  FIG. 4 is a block diagram showing an example of the configuration of the signal processing system of the electronic device according to the embodiment of the present invention. Here, the mobile phone 1 is illustrated as an electronic device.

  As shown in FIG. 4, the mobile phone 1 includes a receiving case 2 and a transmitting case 3, and the receiving case 2 and the transmitting case 3 are mechanically connected as described above. They are connected via the part 4 (hinge mechanism) and electrically connected by a main cable 43 as a first cable and a camera cable 44 as a second cable. The main cable 43 and the camera cable 44 are both constituted by a thin coaxial cable, and both connect the inside of the transmitting case and the inside of the receiving case through a hinge bearing that is inserted from the notch portion 27 into the protruding portion 28. ing.

  A thin coaxial cable has a relatively small diameter among coaxial cables, and has a diameter of 1 mm or less, for example. Recently, those having a diameter of 0.3 mm or less are also known, and have higher noise resistance than FPC, and are excellent in wiring property and flexibility.

  A main display unit 13, a sub display unit 14, a camera 20, and a speaker 50 are mounted on the receiving housing 2. The main display unit 13 and the sub display unit 14 are mounted with an LCD as a display device. On the other hand, the transmission case 3 is configured by a substrate 30, a TV antenna 31, a transmission / reception antenna 35, a microphone 42, and a battery 60. On the substrate 30, a TV tuner 32, an image decoding unit 33, an image display control unit 34, a communication processing unit 36, an audio processing unit 37, a main control unit 38, a key input processing unit 39, a memory 40 (main memory), a switch circuit 41, and a radio circuit 45 (RFID chip) are mounted.

The main control unit 38 is constituted by, for example, a CPU (not shown), and when the CPU sequentially reads and executes a program recorded in the memory 40, the TV tuner 32, the image decoding unit 33, the image display control unit 34, communication It controls various peripheral LSIs such as the processing unit 36, the voice processing unit 37, the key input processing unit 39, and the wireless circuit 45.
The main control unit 38 causes the main display unit 13 to display an image by the image display control unit 34 when the receiving case 2 and the transmitting case 3 are in the open state. Except during recording, the image display control unit 34 switches the image display from the main display unit 13 to the sub display unit 14.

  The main control unit 38 communicates with a wireless tag reader / writer (not shown) via the wireless circuit 45. The radio circuit 45 is an LSI that includes an RF (Radio Frequency) unit 451, a power rectifier unit 452, a storage unit 453, and a logic unit 454, as shown in FIG. These are connected to a loop antenna 71 that is embedded in or attached to the back surface of the battery cover 70 described above. The connection structure of this connection part will be described later.

The radio circuit 45 exchanges information by performing radio wave communication with a radio tag reader / writer (not shown) installed in a convenience store or the like via the loop antenna 71 under the control of the main control unit 38. . Thus, for example, electronic payment can be made by the mobile phone 1, and the mobile phone 1 can be used instead of a wallet, for example.
In addition, a mobile phone may have a wireless tag reader / writer function, and information can be exchanged between mobile terminals.

Specifically, the wireless circuit 45 is activated by an electromotive force based on a resonance action generated by receiving a radio wave from a wireless tag reader / writer (not shown) via the loop antenna 71 (the power of the battery 60 of the mobile phone 1 is reduced). May be used).
The wireless circuit 45 can be operated as the wireless circuit 45 by rectifying the generated electromotive force by the power supply rectification unit 452 and supplying the generated electromotive force to the respective configuration blocks 451, 453, and 454 included in the wireless circuit 45.
Further, a read / write command supplied from a wireless tag reader / writer (not shown) is demodulated by the RF unit 451, and data stored in the storage unit 453 is read by the logic unit 454 and further modulated by the RF unit 451, It is transmitted to a wireless tag reader / writer (not shown) via the loop antenna 71.

  The TV tuner 32 converts, for example, a terrestrial digital broadcast wave received via the TV antenna 31 into an intermediate frequency signal and demodulates it, and further obtains the demodulated signal as a video signal component and an audio signal component. And are supplied to each of the image decoding unit 33 and the audio processing unit 37. The audio processing unit 37 generates an audio signal from the input audio signal component, and outputs it to the speaker 50 of the receiving housing 2 via the main cable 43.

  In addition, the image decoding unit 33 decodes the input video signal component and outputs the decoded video signal component to the image display control unit 34 via the common bus 100.

  The image display control unit 34 converts the decoded signal output from the image decoding unit 33 into image data according to a predetermined format, and outputs the image data to the main display unit 13 of the receiver housing 2 via the main cable 43.

  The image display control unit 34 acquires image data captured and generated by the camera 20 via the camera cable 44 and the common bus 100, converts the image data into image data according to a predetermined format, and transmits the image data of the receiver case 2 via the main cable 43. The data is output to the main display unit 13 or the sub display unit 14. In addition, the communication processing unit 36 includes a high frequency circuit, and modulates audio data input through the microphone 42 and processed by the audio processing unit 37 to be transmitted through the transmission / reception antenna 35 in order to perform radio communication using radio waves. To do. The communication processing unit 36 also demodulates a signal received via the transmission / reception antenna 35 and outputs the demodulated signal to the speaker 50 of the receiver case 2 via the audio processing unit 37.

  The key input processing unit 39 acquires the input information from various keys arranged on the operation unit 18 and passes it to the main control unit 38. Note that the various keys to be arranged include a recording key for instructing recording of a TV broadcast. Further, various keys may be arranged on the receiving housing 2 side via the main cable 43. Furthermore, the side key arranged on the side is also included.

The memory 40 is allocated with storage areas each storing a program executed by the main control unit 38, a table referred to by the program, or data (including display data) used as a work area.
Specifically, the memory 40 is configured by a non-volatile storage device (non-volatile semiconductor memory, hard disk device, optical disk device, etc.), a randomly accessible storage device (eg, SRAM, DRAM), or the like.

  Hereinafter, the electronic device and the battery terminal mounting body according to the embodiment of the present invention will be described in detail with reference to FIGS.

Example 1
FIG. 6 is a perspective view showing a terminal structure of the battery terminal 600 used in the electronic apparatus according to the first embodiment of the present invention. The battery terminal 600 has a generally rectangular shape as its outer shape, and is made of a non-conductive member such as a resin other than the connection portion described later. As shown in FIG. 6, the battery terminal 600 into which the power supply terminal of the battery 60 and the ground terminal (second terminal) are fitted is characteristically a substrate not shown (30 in FIG. 4). An anchor 601 (first connecting portion) made of a conductor used for fixing to the antenna is extended to a position where it becomes a top plate, and one of the extended portions (top plate 601b) is connected to the loop antenna 71. The other end 71b (ground terminal) (first terminal) is used as the contact surface. This contact surface is connected to a ground terminal (ground pattern) 30 b of the substrate 30.

  Therefore, the connector 160 conventionally required for connecting the ground terminal of the loop antenna 71 to the radio circuit 45 becomes unnecessary. The other part (top plate 601 a) obtained by extending the anchor 601 is connected to the power supply terminal 600 a of the battery terminal 600.

  FIG. 7 shows a layout configuration showing the relationship between the substrate 30 and the loop antenna. As shown in FIG. 7, the connection terminal 71 a of the loop antenna 71 is connected to the top plate 601 a (third connection portion) of the anchor 601 to which the battery terminal 600 is fixed to the substrate 30, and the G ground terminal 71 b of the loop antenna 71. Is connected to the top plate 601b of the anchor 601.

  As described above, according to the electronic device and battery terminal mounting body according to the first embodiment of the present invention, the ground terminal of the battery 60, the ground terminal 30b of the substrate 30 on which the radio circuit 45 is mounted, and the loop antenna 71 are provided. By providing the ground terminal connection portion structure (the top plate 601b of the anchor 601) that connects the ground terminal 71b, the battery terminal 600 also serves as a connector for grounding the loop antenna 71, so that the number of components can be reduced and the mounting space is also increased. Since it can reduce, it can contribute to size reduction and thickness reduction of electronic devices, such as a mobile telephone 1. FIG.

(Example 2)
8 and 9 are cross-sectional views showing the terminal structure of the battery terminal 600 used in the electronic apparatus according to the second embodiment of the present invention. The battery terminal 600 before and after the battery 60 is mounted and the battery cover, respectively. 70 shows the connection relationship with the loop antenna 71 embedded in the back surface of 70 or attached and mounted, and the cross-sectional structures seen from the front and the lateral direction are shown in (a) and (b).

  As shown in FIGS. 8A and 8B, the loop antenna 71 is provided with spring contacts 72a and 72b for making contact with the anchor 601 of the battery terminal 600 mounted on the substrate 30. To do. Characteristically, as shown in FIGS. 9A and 9B, when the battery 60 is fitted and attached to the battery terminal 600, the battery cover is attached to the top plates 601 a and 601 b of the anchor 601 of the battery terminal 600. When 70 (including the loop antenna 71 embedded or pasted on the back surface) is pressed, the spring contacts 72a and 72b are compressed, but the compression (spring thickness x) is constant, and the resin is relatively hard. There is a spacer 73 formed of a material. Here, it is assumed that the spacer 73 is attached to the battery cover 70 in which the loop antenna 71 is embedded or pasted on the back surface.

  That is, when the battery 60 is mounted on the battery terminal 600, the connection terminal 71a and the ground terminal 71b of the loop antenna 71 are connected to the top plate 601a of the anchor 601 that fixes the battery terminal 600 to the substrate 30 via the spring contacts 72a and 72b, respectively. , 601b, respectively. At this time, the spring contacts 72 a and 72 b are both compressed by loading the loop antenna 71. However, due to the presence of the spacer 73, the spring thickness x, that is, the back surface of the battery cover 70 is compressed. The distance between the connection terminal 71a and the ground terminal 71b of the loop antenna 71 that is embedded in or attached to and the top plates 601a and 601b of the anchor 601 is kept constant.

According to the electronic device and battery terminal package according to the second embodiment of the present invention described above, the spacer 73 keeps the distance between the loop antenna 71 and the top plates 601a and 601b of the anchor 601 constant. Fluctuation can be prevented and occurrence of antenna frequency deviation can be suppressed.
The battery terminal 600 includes a second connection portion (60b) that connects the ground terminal 60b of the battery 60 and the ground terminal 30b of the substrate 30, the ground terminal 71b of the loop antenna 71, and the ground terminal 30b of the substrate 30. The ground terminal 71b of the loop antenna 71 is connected to the ground terminal 71 of the battery 60 having the most stable ground level by connecting and having the first connection portion (601b) that also serves as an anchor 601 for fixing the battery 60 to the substrate 30. Since it can be mounted as close as possible to 60b, an increase in the L component can be prevented, and thus a frequency shift can be avoided, and the antenna performance of the loop antenna 71 can be improved. Furthermore, the space for introducing external noise can be reduced as much as possible depending on the mounting position.

  In addition, according to the electronic device and the battery terminal mounting body according to the second embodiment of the present invention, the spring contacts 72a and 72b and the spacer 73 are attached to the loop antenna 71 side. The same effect can be obtained by attaching to the battery terminal 600 side instead of attaching to the battery terminal 600 side.

10 (a) and 10 (b) show an application example in which spring contacts 72a and 72b are provided on the top plates 601a and 601b of the anchor 601, and FIGS. 11 (a) and 11 (b) show a spacer 73 on the battery terminal 600 side (anchor). The application examples provided in 601) are shown respectively.
12A and 12B are obtained by replacing the spring contacts 72a and 72b with a pin 74 including a spring therein. In this case, the pin length is changed when pressed by the battery cover 70.
10 to 12, (a) and (b) show the connection state between the loop antenna 71 before and after the battery cover 70 is mounted and the top plates 601 a and 602 b of the anchor 601.

According to the second embodiment described above, the spacer 73 is a single rod-shaped material between the spring contacts 72a and 72b. However, the spacer 73 is embedded inside the back surface of the battery cover 70 or is mounted by sticking. As long as it can maintain a certain distance between 71 and the battery terminal 600, the shape and quantity are not ask | required.
Examples of using two spacers (73a, 73b) are shown in FIGS. 13 and 14, respectively. FIG. 13 shows an example using spring contacts, and FIG. 14 shows an example using two pin contacts 74a and 74b.

(Example 3)
FIG. 16 is a diagram illustrating a planar structure of the battery terminal 600 used in the electronic apparatus according to the third embodiment of the present invention. Here, the anchor 601 is configured such that both ends of the battery terminal 600 are fixed to the ground terminal 30b of the substrate, and the top plates 601a and 601b of the anchor 601 are arranged in a staggered configuration.
As a result, the mounting position of the ground terminal 71b of the loop antenna 71 becomes closer to the mounting position of the ground terminal on the substrate and the contact area increases, thereby strengthening the electrical connection and further stabilizing the ground potential. Is peeled off.

  As described above, according to the electronic device and battery terminal connection structure of the present invention, the anchor 601 for fixing the battery terminal 600 on the substrate 30 is extended to the top plate position of the battery terminal 600, and thus formed. By using two or more top plates (here, 601a and 601b) as the antenna terminals of the loop antenna 71, the ground terminal 60b of the battery 60 and the ground terminal of the loop antenna 71 can be mounted at close positions. Thus, it is possible to make it less susceptible to external noise and to reduce fluctuations in the L component and C component due to variations in antenna wiring. Further, a connector for connecting the loop antenna 71 to the radio circuit 45 is not required, and this also has an effect of reducing the mounting space.

Further, conventionally, the loop antenna 71 embedded or sealed on the back surface of the battery cover 70 and the substrate 30 on which the wireless circuit 45 and the like are mounted are brought into contact with each other by a spring, a pin, etc. It was fixed by pressure welding.
In this case, depending on the accuracy and tightening method of the battery cover 70, there is a variation in the distance between the loop antenna 71 and the battery terminal 600 that is opposed to each other, resulting in a frequency shift, which makes frequency design difficult. By providing the spacer 73 that keeps a constant distance between the contact terminals of the loop antenna 71 and the battery terminal 600, the parasitic capacitance between them can be kept constant, and the variation in frequency can be reduced.

  The spring contact may be an elastic conductor. In the connected state, the spring contact imparts an elastic force that presses at least the ground terminal of the antenna to the outside of the housing, and the top plate (first connection portion). In contrast, any elastic force may be used as long as it provides an elastic force that presses the substrate toward the mounting surface.

The anchor 601 may be fixed to the substrate 30 by soldering using a reflow furnace, screws or the like.
In addition, according to the above-described electronic device according to the embodiment of the present invention, only the mobile phone 1 is exemplified as the electronic device. However, the mobile device is not limited to the mobile phone 1 and is a mobile terminal such as a PDA (Personal Digital Assistants) or a game machine. The same can be applied to all.

It is the front view which showed the external appearance of the electronic device which concerns on embodiment of this invention in the open state. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a lateral view of an electronic device according to an embodiment of the present invention in an open state. It is the front view and back view which show the external appearance of the electronic device which concerns on embodiment of this invention in a closed state. It is a block diagram which shows an example of a structure of the signal processing system of the electronic device which concerns on embodiment of this invention. FIG. 5 is a block diagram illustrating an example of an internal configuration of a wireless circuit illustrated in FIG. 4. It is a perspective view which shows the terminal structure of the battery terminal used with the electronic device which concerns on Example 1 of this invention. It is a figure which shows the layout structure of the board | substrate and loop antenna which are used with the electronic device which concerns on Example 1 of this invention. It is sectional drawing (1) which shows the terminal structure of the battery terminal used with the electronic device which concerns on Example 2 of this invention. It is sectional drawing (2) which shows the terminal structure of the battery terminal used with the electronic device which concerns on Example 2 of this invention. It is an application example (1) which shows the terminal structure of the battery terminal used with the electronic device which concerns on Example 2 of this invention. It is the application example (2) which shows the terminal structure of the battery terminal used with the electronic device which concerns on Example 2 of this invention. It is an application example (3) which shows the terminal structure of the battery terminal used with the electronic device which concerns on Example 2 of this invention. It is an application example (4) which shows the terminal structure of the battery terminal used with the electronic device which concerns on Example 2 of this invention. It is the application example (5) which shows the terminal structure of the battery terminal used with the electronic device which concerns on Example 2 of this invention. It is sectional drawing (1) which shows the terminal structure of the battery terminal used with the electronic device which concerns on Example 3 of invention. It is sectional drawing (2) which shows the terminal structure of the battery terminal used with the electronic device which concerns on Example 3 of invention. It is a figure which shows an example of the loop antenna mounting structure of the mobile telephone in which the conventional RFID communication is possible. It is a figure which shows an example of the loop antenna mounting structure of the mobile telephone in which the conventional RFID communication is possible.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Mobile phone, 2 ... Reception housing | casing, 3 ... Transmission housing | casing, 30 ... Board | substrate (30b ... Grounding terminal (ground pattern)), 38 ... Main control part, 45 ... Wireless circuit, 60 ... Battery (60a ... Power feeding Terminal, 60b ... ground terminal (second terminal), 70 ... battery cover (wall surface), 71 ... loop antenna (71a ... connection terminal (third terminal), 71b ... ground terminal (first terminal) ), 72 (72a, 72b) ... Spring contact, 73 (73a, 73b) ... Spacer, 74 ... Pin contact, 600 ... Battery terminal (600a ... Feed terminal, 600b ... Ground terminal (second connection part)), 601 ... Anchor (601a ... top plate (third connection portion), 601b ... top plate (first connection portion)).

Claims (8)

An antenna having a first terminal connected to the ground;
A substrate on which a ground pattern is formed;
A battery having a second terminal connected to the ground in addition to a terminal for supplying power;
An electronic apparatus comprising: a battery terminal provided on the substrate, the battery terminal having connection means for electrically connecting the first terminal, the second terminal, and the ground pattern. The connection means is
A first connecting portion in contact with the first terminal and electrically connecting the ground pattern;
The electronic apparatus according to claim 1, comprising: a second connection portion that is in contact with the second terminal and electrically connects the ground pattern. The electronic device according to claim 2, wherein the first connection portion is a fixing member that fixes the battery terminal to the substrate. The antenna is formed so as to face the mounting surface of the substrate on the inner side of a housing wall surface that forms the appearance of the electronic device,
The second connection portion is formed to face the antenna forming surface of the housing with a predetermined interval,
The first terminal or the first connection portion has elasticity,
A spacer for maintaining the predetermined distance is disposed between the antenna forming surface of the housing and the first connection portion,
The first connection portion applies a pressing elastic force in the outer direction of the housing to the first terminal, or the first terminal is a mounting surface of the substrate with respect to the first connection portion. The electronic device according to claim 2, wherein an elastic force is applied to the side. The first connection portion is
The electronic device according to claim 3, wherein the battery terminal is fixed to the substrate at two locations. The antenna further includes a third terminal connected to an electronic circuit,
In an electronic device comprising a wireless circuit connected to the third terminal and disposed on the substrate,
The said 3rd terminal and the said radio | wireless circuit are electrically connected through the 3rd connection part distribute | arranged to the said battery terminal. The any one of Claim 1 to 5 characterized by the above-mentioned. Electronics. The first connection portion is
The electronic device according to claim 6, wherein an area of a portion in contact with the first terminal is larger than other portions of the first connection portion. In a battery terminal mounting body consisting of a substrate and battery terminals attached to the substrate,
The battery terminals are
A non-conductive member having a substantially rectangular parallelepiped shape;
Of the surfaces of the non-conductive member, the non-conductive member that electrically connects a part of the mounting surface which is a surface mounted on the substrate and a part of the first surface adjacent to the mounting surface. A second connecting portion formed through the inside,
A second surface facing the mounting surface among the surfaces of the non-conductive member, and a first connection portion that electrically connects the substrate;
A battery terminal mounting body comprising:

Images