JP5462683B2 - Mobile communication terminal - Google Patents

Description

  The present invention relates to a portable communication terminal having a function of communicating with an external device.

  In a slide-type mobile phone, a slide module configured to be slidable between a first housing and a second housing and a substrate accommodated in the first housing or the second housing are connected via a reactance element. A technique for improving the impedance characteristics and widening the antenna radiation characteristics by performing is disclosed (see Patent Document 1).

JP 2006-325098 A

  By the way, in the cellular phone, it is expected to improve the impedance characteristics and to further effectively use the slide module.

  An object of this invention is to provide the portable communication terminal which can communicate using a slide module effectively.

  In order to solve the above-described problem, a mobile communication terminal according to the present invention includes a first housing that includes a display unit and a slide module, a second housing that includes an operation unit, and a communication unit that communicates with the outside. The first housing and the second housing are slidably connected to the open state and the closed state by the slide module, and the slide module has conductivity, and the A combination of a spring coil that contracts when it transitions to the closed state and expands when it transitions from the closed state to the open state, and a spring coil guide that is inserted inside the spring coil and supports the spring coil The one end of the spring coil is connected to the feeding point of the communication unit, and the communication unit is connected to the feeding point when communicating with the outside. It said spring coils being a structure used as the antenna element.

  Further, in the mobile communication terminal, the slide module includes a plurality of sets of the spring coil and the spring coil guide configured as a set, and the communication unit performs communication with the outside. A configuration in which communication is simultaneously performed by the plurality of spring coils is preferable.

  In the mobile communication terminal, the communication unit preferably receives an AM broadcast wave, an FM broadcast wave, or a terrestrial digital broadcast wave by using the spring coil as an antenna element.

  In the portable communication terminal, the spring coil guide is preferably composed of a member including ferrite, and the communication unit preferably receives AM broadcast waves by using the spring coil as an antenna element.

  In the mobile communication terminal, the spring coil is preferably plated and is coupled to the feeding point at a high frequency by capacitive coupling.

  In the mobile communication terminal, the communication unit preferably employs LTE (Long Term Evolution) as a communication standard.

  According to the present invention, communication can be performed by effectively utilizing the slide module.

The external appearance perspective view when the mobile telephone apparatus which concerns on this embodiment changes to a closed state is shown. The external appearance perspective view when the mobile telephone apparatus which concerns on this embodiment changes to an open state is shown. It is a functional block diagram which shows the structure of the mobile telephone apparatus which concerns on this embodiment. It is a figure where it uses for description about a structure and operation | movement of a slide module. It is a figure where it uses for description about the connection of a spring coil and a feeding point. It is a figure where it uses for description about the case where the spring coil from which length differs is employ | adopted. It is a figure where it uses for description about operation | movement of a communication part. It is a figure which shows the specific structure for implement | achieving MIMO. It is a figure which shows the specific structure for implement | achieving MIMO. It is a figure where it uses for description about the specific example of a matching and electric power feeding system. It is a figure which shows the specific structure for receiving AM broadcast wave. It is a figure which shows the structure of 3 steps | paragraphs of slide-type mobile telephone apparatuses.

  Embodiments of the present invention will be described below. 1 and 2 are external perspective views of a mobile phone device 1 which is an example of a mobile communication terminal according to the present invention. In the present embodiment, the cellular phone device 1 will be described. However, the present invention is not limited to the cellular phone device. For example, PHS (Personal Handyphone System), PDA (Personal Digital Assistant), portable navigation. It may be a device, a notebook computer, or the like.

  The cellular phone device 1 is configured to include an operation unit side body 2 (first housing) and a display unit side body 3 (second housing). In the operation unit side body unit 2, an operation key group 11 and a microphone 12 are arranged on the surface unit 10. The operation key group 11 includes input operation buttons for inputting numbers such as telephone numbers and characters such as mail. The microphone 12 is inputted with a voice uttered by the user of the mobile phone device 1 during a call.

  In the display unit side body 3, an LCD display unit 21, a first speaker 22, a second speaker 23, and a determination operation key group 24 are arranged on the surface unit 20. The LCD display unit 21 displays various information. The first speaker 22 outputs the voice of the other party on the call. The determination operation key group 24 includes buttons for determining, scrolling, and the like in various operations.

  In addition to the above, the mobile phone device 1 includes other components. Other components are, for example, an imaging unit configured with a CCD (Charge Coupled Device) camera or a CMOS (Complementary Metal Oxide Semiconductor) camera that captures an image of a subject, a speaker that outputs music to the outside, and the like.

  The upper end of the operation unit side body 2 and the lower end of the display unit side body 3 are connected via a connecting part (hereinafter referred to as a slide module 4) having a slide mechanism. Therefore, the operation unit side body 2 and the display unit side body 3 are overlapped with each other, and the display unit side body 3 covers the upper surface of the operation unit side body 2 (in a slide-down state, Hereinafter, it is referred to as a closed state) (see FIG. 1), and the display unit side body 3 is slid in the longitudinal direction with respect to the operation unit side body 2 to cover the operation unit side body 2. The exposed state (the operation key group 11 and the microphone 12) can be freely changed (a slide-up state, hereinafter referred to as an open state) (see FIG. 2).

  FIG. 3 is a functional block diagram showing the configuration of the mobile phone device 1. As shown in FIG. 3, the cellular phone device 1 includes an operation key group 11, a microphone 12, a main antenna 40a, a sub-antenna 40b, an RF circuit unit 41, an LCD control, and the like on an operation unit side body unit 2. Unit 42, audio processing unit 43, memory 44, control unit 45, and playback unit 46, display unit side body unit 3, LCD display unit 21, first speaker 22, second unit A speaker 23, a determination operation key group 24, and a driver IC 25 are provided. The determination operation key group 24 may be arranged on the operation unit side body 2. Hereinafter, the operation key group 11 and the determination operation key group 24 are collectively referred to as an operation unit 60 as necessary.

  The main antenna 40a and the sub-antenna 40b communicate with a base station or the like in a first use frequency band (for example, 800 MHz) and can correspond to a second use frequency band (for example, 1.5 GHz) for GPS communication. It is a dual band compatible configuration. In the present embodiment, the first frequency band used is 800 MHz, but other frequency bands may be used. Further, the main antenna 40a and the sub-antenna 40b may be separately provided with an antenna that communicates with an external device in the first use frequency band and can correspond to the second use frequency band for GPS communication.

  The RF circuit unit 41 demodulates the signal received by the main antenna 40 a or the sub antenna 40 b and supplies the processed signal to the control unit 45. Then, the signal supplied from the control unit 45 is modulated and transmitted to an external device (base station) via the main antenna 40a or the sub antenna 40b. On the other hand, the control unit 45 is notified of the strength of the signal received by the main antenna 40a or the sub-antenna 40b. The main antenna 40a, the sub-antenna 40b, and the RF circuit unit 41 are collectively referred to as a communication unit 50.

  The LCD control unit 42 performs predetermined image processing under the control of the control unit 45 and outputs the processed image data to the driver IC 25. The driver IC 25 stores the image data supplied from the LCD control unit 42 in the frame memory and outputs it to the LCD display unit 21 at a predetermined timing.

  The sound processing unit 43 performs predetermined sound processing on the signal supplied from the RF circuit unit 41 under the control of the control unit 45 and supplies the processed signal to the first speaker 22. The first speaker 22 converts the signal supplied from the sound processing unit 43 into sound and outputs the sound to the outside.

  In addition, the sound processing unit 43 processes the signal input from the microphone 12 according to the control of the control unit 45 and supplies the processed signal to the RF circuit unit 41. The RF circuit unit 41 performs predetermined processing on the signal supplied from the audio processing unit 43, and supplies the processed signal (high-frequency signal) to the main antenna 40a or the sub-antenna 40b. The main antenna 40a or the sub antenna 40b outputs the supplied signal to the outside as a radio wave.

  The memory 44 includes, for example, a working memory and is used for arithmetic processing by the control unit 45. The memory 44 stores a plurality of applications, various tables required by the applications, music data, movie data, and the like. The memory 44 may also serve as a removable external memory.

  For example, the playback unit 46 performs playback processing on movie data stored in the memory 44, supplies the video signal after the playback processing to the LCD control unit 42, and supplies an audio signal to the second speaker 23. . Note that the playback unit 46 performs a playback process so that there is no synchronization error between the video signal and the audio signal, and supplies them to the LCD control unit 42 and the second speaker 23, respectively. Therefore, the video output from the LCD display unit 21 and the audio output from the second speaker 23 are synchronized.

  The control unit 45 controls the entire mobile phone device 1 and is configured using a central processing unit (CPU) or the like. In addition, the control unit 45 performs control to change the symbols and functions assigned to the keys constituting the operation key group 11 and the determination operation key group 24 according to the application that is currently activated actively in principle. . The memory 44 stores a plurality of key assignment tables, and the control unit 45 switches the key assignment table to be referenced according to the activated application, and operates the operation key group 11 and the determination operation key group 24. The predetermined key assignment table is referred to based on the key position information transmitted from the key to execute a predetermined process.

Here, a specific configuration of the slide module 4 will be described. As shown in FIG. 4A, the slide module 4 includes a spring coil 4b and a spring coil guide 4c that is inserted inside the spring coil 4b and supports the spring coil 4b. And a movable portion 4d that is slidably mounted on the spring coil guide 4c.
The spring coil 4b has one end (the portion surrounded by A in FIG. 4A) fixed to the wall surface 4e of the slide module 4, and the other end (B in FIG. 4A). The enclosed part) is fixed to the movable part 4d.

  Further, as shown in FIG. 4A, the spring guide 4a has an opening 4f formed in a predetermined shape on the upper surface, and the protrusion 4g formed on the movable portion 4d is exposed from the opening. It has a structure.

  When the slide module 4 slides the protrusion 4g of the movable portion 4d exposed from the opening 4f of the spring guide 4a in one direction, the spring coil 4b contracts (FIG. 4B) and in the other direction. When slid, the spring coil 4b is extended by a restoring force (FIG. 4C).

  Further, the slide module 4 is arranged in a pair of left and right on a surface that is not the surface portion 20 of the display unit side body unit 3 (a surface facing the surface unit 10 of the operation unit side unit 2), and the movable unit 4d. The tip of the protrusion 4g is fixed at a predetermined location on the surface 10 of the operation unit side body 2. Here, the tip of the protruding portion 4g of the movable portion 4d is formed in a protruding flange shape.

  With this configuration, the cellular phone device 1 is restored when the spring coil 4b is contracted in the spring guide 4a in the closed state but is changed from the closed state to the open state. Since the spring coil 4b is extended by the force, it is possible to smoothly transition to the open state. Although not shown, the cellular phone device 1 is fixed by a fixing member so as not to be shifted to the open state only by the restoring force of the pair of left and right spring coils 4b in order to maintain the closed state. And in the closed state, the mobile telephone device 1 is configured to smoothly transition to the open state by applying an external force that is only released from the fixing member.

  4 (d) shows a perspective view transparently showing the mobile phone device 1 in the closed state, FIG. 4 (e) shows a cross-sectional view as seen from the side of the mobile phone device 1 in the closed state, FIG. 4 (f) shows a transmission diagram through which the cellular phone device 1 in the closed state is seen from above.

  4 (g) shows a perspective view transparently showing the mobile phone device 1 in the open state, FIG. 4 (h) shows a cross-sectional view seen from the side of the mobile phone device 1 in the open state, FIG. 4 (i) shows a transparent view of the mobile phone device 1 in the open state that is transmitted from the upper surface.

  The cellular phone device 1 configured as described above has a configuration in which the configuration of the slide module can be effectively used for communication by the communication unit 50. The configuration will be described in detail below.

  As described above, the cellular phone device 1 communicates with the display unit side housing unit 3 including the LCD display unit 21 and the slide module 4, the operation unit side housing unit 2 including the operation unit 60, and the outside. And a communication unit 50.

  The display unit side body 3 and the operation unit side body 2 are slidably connected to each other in an open state and a closed state by a slide module 4. The slide module 4 has conductivity, and contracts when the transition is made from the open state to the closed state, and expands with a predetermined restoring force when the transition is made from the closed state to the open state. It is configured by a combination of a spring coil guide 4c that is inserted inside the spring coil 4b and supports the spring coil 4b. Further, as shown in FIG. 5, the spring coil 4b has one end portion (portion surrounded by A in FIG. 5) connected to a feeding point 50a of the communication unit 50 (not shown). Further, when communicating with the outside, the communication unit 50 uses the spring coil 4b connected to the feeding point 50a as an antenna element.

  With this configuration, the cellular phone device 1 actively uses the spring coil 4b for smoothly transitioning from the closed state to the open state as an antenna element. In addition, the antenna element of the communication unit 50 can be made unnecessary, and it is possible to meet the demand for downsizing and cost reduction. Since the length of the spring coil 4b varies depending on the open state and the closed state, the mobile phone device 1 may be configured to appropriately change the capacitance of the capacitor that adjusts the resonance frequency according to the state.

  Further, as shown in FIG. 5, the cellular phone device 1 can use a pair of left and right spring coils 4b as antenna elements, and therefore, a diversity reception method may be employed.

  Here, there are two types of diversity methods, a switching method and a combining method. The switching method is a method in which a receiver having high communication quality is selected by two branches (two antennas and two receivers in some cases) to maintain the reception quality. The combining method is a method for combining two branches to improve reception quality. The cellular phone device 1 may adopt either a switching method or a synthesis method.

  Further, in the above description, the slide module 4 is arranged in a pair of left and right on the surface that is not the surface portion 20 of the display unit side body 3 (the surface facing the surface portion 10 of the operation unit side body 2). Although described as a thing, it is not restricted to this, The spring coil 4b comprised by 1 set and the spring coil guide 4c may be comprised by multiple sets (2 or more sets). In the case of such a configuration, when communicating with the outside, the communication unit 50 performs simultaneous broadband communication by using the plurality of spring coils 4b.

  With this configuration, the mobile phone device 1 can realize MIMO (Multiple Input Multiple Output), which is one of wireless communication technologies that expands a data transmission / reception band by combining a plurality of antennas. . Therefore, if the number of spring coils 4b is n, the cellular phone device 1 can theoretically expand the bandwidth to n times.

  In this way, the cellular phone device 1 actively uses the plurality of spring coils 4b for smoothly transitioning from the closed state to the open state for MIMO and also as a plurality of antenna elements. Broadband communication can be realized while not requiring an antenna element and meeting demands for miniaturization and cost reduction. Since the length of the spring coil 4b varies depending on the open state and the closed state, the mobile phone device 1 may be configured to appropriately change the capacitance of the capacitor that adjusts the resonance frequency according to the state.

  Further, the mobile phone device 1 may be configured to appropriately switch not only the MIMO but also the above-described diversity method and beam forming method as necessary. For example, the mobile phone device 1 selects MIMO when it is desired to obtain a high peak data rate, and selects a diversity method or a beam forming method when it is desired to obtain good coverage. Further, when it is desired to obtain a high capacity, the cellular phone device 1 selects a combination with the beam forming method or the multilayer transmission method.

  Further, the communication unit 50 uses the spring coil 4b as an antenna element, and AM broadcast waves (522 kHz to 1629 kHz), FM broadcast waves (76.0 MHz to 90.0 MHz), or terrestrial digital broadcast waves (470 MHz to 770 MHz). ) Is preferable.

  In this way, the cellular phone device 1 can also use the spring coil 4b for smoothly transitioning from the closed state to the open state as an antenna that actively receives AM broadcast waves, FM broadcast waves, or terrestrial digital broadcast waves. Since it is used, a dedicated antenna for receiving AM broadcast waves, FM broadcast waves, or terrestrial digital broadcast waves is not required, and it is possible to meet demands for downsizing and cost reduction.

  The cellular phone device 1 is configured to be a closed circuit (loop) when the spring coil 4b is used as an antenna for receiving AM broadcast waves. Further, since the length of the spring coil 4b changes depending on the open state and the closed state, the mobile phone device 1 may be configured to appropriately change the capacitance of the capacitor that adjusts the resonance frequency according to the state.

  Moreover, it is preferable that the spring coil guide 4c is comprised with the member containing a ferrite. In the case of such a configuration, the communication unit 50 receives the AM broadcast wave using the spring coil 4b as an antenna element.

  Thus, since the cellular phone device 1 uses the spring coil guide 4c as a ferrite bar, the so-called ferrite bar antenna can be constituted by the spring coil guide 4c and the spring coil 4b, and AM broadcast waves can be efficiently produced. Can be received. Since the spring coil 4b is built in the spring guide 4a with the spring coil guide 4c as a core, the shield effect by the spring guide 4a can be enjoyed and noise can be suppressed.

  Since the cellular phone device 1 uses the spring coil 4b as an antenna for receiving AM broadcast waves, the spring coil 4b is configured to be a closed circuit (loop). Further, since the length of the spring coil 4b changes depending on the open state and the closed state, the mobile phone device 1 may be configured to appropriately change the capacitance of the capacitor that adjusts the resonance frequency according to the state.

  Moreover, it is preferable that the one end part of the spring coil 4b is subjected to a plating process and is coupled at a high frequency by capacitive coupling with the feeding point 50a. Details of the plating process will be described later.

  Here, since the length of the spring coil 4b changes due to the transition between the open state and the closed state, the resonance frequency shifts when used as an antenna. In view of this, the mobile phone device 1 can absorb this shift in resonance frequency because the one end of the spring coil 4b and the feeding point 50a are capacitively coupled.

  Therefore, in the mobile phone device 1, the surface of the spring coil 4b is plated, and the one end side of the spring coil 4b and the feeding point 50a are capacitively coupled, so that the mobile phone device 1 smoothly transitions from the closed state to the open state. The spring coil 4b can be used as an antenna element without impairing the original function (restoring force) of the spring coil 4b.

  The communication unit 50 employs LTE (Long Term Evolution) as a communication standard.

  Here, LTE is one of high-speed data communication specifications for mobile phones, and is a standard that further evolves the high-speed data communication standard “HSDPA” of the third generation mobile phone system “W-CDMA”. Also, LTE stipulates that high-speed communication of 100 Mbps or higher / 50 Mbps or higher is possible.

  Therefore, the mobile phone device 1 can actively use the spring coil 4b for smoothly transitioning from the closed state to the open state as an antenna element, and can realize MIMO or the like. It can correspond to technology.

<Other Example 1>
In addition, each of the spring coils 4b may be configured to have a relatively different length. In the case of such a configuration, in the closed state and the open state, as shown in FIGS. 6A and 6B, the lengths of the spring coils 4b are relatively different from each other.

  Then, the cellular phone device 1 forms four types of spring coils 4b having different lengths in the open state and the closed state. For example, as shown in FIGS. 7A and 7B, the communication unit 50 receives a signal in the low frequency band X1 by the longer spring coil 4b in a certain frequency band X, and the shorter spring coil 4b. Thus, a signal in the high frequency band X2 is received.

  Specifically, in the open state, the communication unit 50 receives a low frequency band signal by the longer spring coil 4b (FM broadcast wave low band (76.0 MHz to 83 MHz) or terrestrial digital broadcast wave Low band (470 MHz to 620 MHz), and receives a high frequency band signal by the shorter spring coil 4b (high band band of FM broadcast wave (83.0 MHz to 90 MHz) or high band band of terrestrial digital broadcast wave) (620 MHz to 770 MHz)). In this manner, the communication unit 50 receives signals in all reception frequency bands of FM broadcast waves (76.0 MHz to 90.0 MHz) or terrestrial digital broadcast waves (470 MHz to 770 MHz). Further, the mobile phone device 1 can receive all FM broadcast waves and terrestrial digital broadcast waves by changing the number of turns and the pitch of the left and right spring coils without changing the lengths of the left and right spring coils. The frequency band can be covered.

  The mobile phone device 1 may be configured to receive FM broadcast waves in the open state and receive terrestrial digital broadcast waves in the closed state. In addition, the mobile phone device 1 starts an application that receives an FM broadcast wave in response to the transition from the closed state to the open state, and triggers the transition from the open state to the closed state. It may be configured to start an application that receives broadcast waves.

  Further, as shown in FIGS. 6A and 6B, in the mobile phone device 1, the main antenna 40a is disposed on one end side of the operation unit side body 2, and the sub antenna 40b is provided on the operation unit side case. It is arranged on the other end side of the body part 2.

  With this configuration, the mobile phone device 1 performs call communication in a frequency band having a center frequency of 800 MHz using the main antenna 40a and the sub antenna 40b, and has different lengths in the open state. FM broadcast waves can be received using the spring coil 4b, and in the closed state, digital terrestrial broadcast waves can be received using the spring coils 4b having different lengths.

  In the closed state where the spring coil 4b is contracted (FIG. 6 (a)), the cellular phone device 1 has one end of the spring coil 4b (the portion surrounded by A in FIG. 6 (a)). The feeding point 50a is connected and the spring coil 4b is used as an antenna element. In the open state in which the spring coil 4b is extended (FIG. 6B), the cellular phone device 1 releases the connection state between the one end of the spring coil 4b and the feeding point 50a. The other end of 4b (the part surrounded by A in FIG. 6B) and the feeding point 50b are connected, and the spring coil 4b is used as an antenna element. Note that the cellular phone device 1 may have a configuration in which the feeding point 50a is connected to one end portion of the spring coil 4b (the portion surrounded by A in FIG. 6A) in both the open state and the closed state. .

<Other Example 2>
Next, a specific configuration for realizing the above-described MIMO will be described. In this embodiment, the cellular phone device 1 simultaneously receives data by the spring coils 101 and 102 and simultaneously transmits data by the antennas 103 and 104 (FIG. 8).

  With this configuration, the cellular phone device 1 transmits data by combining two antennas, and receives data by combining another two antennas, thereby reducing the transmission / reception bandwidth. Expanding MIMO can be realized.

  Here, since the lengths of the spring coils 101 and 102 are changed by mutual transition between the open state and the closed state (FIGS. 8A and 8B), when used as an antenna, the resonance frequency is changed. Will shift. Therefore, the cellular phone device 1 adopts a matching / power feeding method, which will be described later in detail, and devise the connection state between one end of the spring coils 101 and 102 and the power feeding points 105 and 106, thereby resonating. The frequency shift can be absorbed. Therefore, the cellular phone device 1 can be used in an antenna element without damaging the original function (restoring force) of the spring coils 101 and 102 in both the open state and the closed state. Communication can be performed. 8A shows the open state, and FIG. 8B shows the closed state.

  In addition, the cellular phone device 1 may transmit data simultaneously using the spring coils 101 and 102 and receive data simultaneously using the antennas 103 and 104.

  Further, as shown in FIG. 9, the cellular phone device 1 transmits data by combining four antennas, and receives data by combining another four antennas, thereby reducing the transmission / reception bandwidth. Further expanded MIMO can be realized.

  Specifically, in the mobile phone device 1, the spring coil 101 is separated into a first spring coil 101a and a second spring coil 101b, and a spacer 101c that slides on the spring coil guide is provided with the first spring coil 101a and the second spring coil. It is the structure arrange | positioned between the coils 101b. The spacer 101c has a function of electrically insulating the first spring coil 101a and the second spring coil 101b.

  The mobile phone device 1 also includes a first feeding point 105a connected to the first spring coil 101a, a second feeding point 105b connected to the second spring coil 101b, and a switch connected to the first feeding point 105a. Unit 107 and a power supply pad unit 108 connected to the switch unit 107 via a connection pattern.

  The switch unit 107 is connected to the control unit 45 and switches between the ON state and the OFF state according to the control of the control unit 45. When the control unit 45 detects the open state, the control unit 45 controls the switch unit 107 to be in an OFF state so that the first feeding point 105a and the feeding pad unit 108 are not electrically connected. Further, when the control unit 45 detects the closed state, the control unit 45 controls the switch unit 107 to be in an ON state so that the first feeding point 105a and the feeding pad unit 108 are electrically connected. Further, when the cellular phone device 1 is closed, the first feeding point 105a and the feeding pad unit 108 are electrically connected via the switch unit 107, and the first spring coil 101a and the feeding pad unit 108 are high-frequency. It is configured to connect to.

  Therefore, in the cellular phone device 1, the first spring coil 101 a and the first feeding point 105 a are not directly connected in the closed state, but the first spring coil 101 a and the first spring coil 101 a are connected via the feeding pad unit 108 and the switch unit 107. Since the first feeding point 105a is electrically connected, the first spring coil 101a can also be used as an antenna element. Further, since the mobile phone device 1 is configured such that the second spring coil 101b and the second feeding point 105b are electrically connected both in the open state and in the closed state, the second spring coil 101b can also be used as an antenna element. Can be used.

  Similarly, on the side of the spring coil 102, the cellular phone device 1 includes a spring coil 102 that is separated into a first spring coil 102a and a second spring coil 102b, and a spacer 102c that slides on the spring coil guide is a first spring coil. It is configured to be disposed between 102a and the second spring coil 102b. The spacer 102c has a function of electrically insulating the first spring coil 102a and the second spring coil 102b.

  In addition, the mobile phone device 1 includes a first feeding point 106a connected to the first spring coil 102a, a second feeding point 106b connected to the second spring coil 102b, and a switch connected to the first feeding point 106a. Unit 109 and a power supply pad unit 110 connected to the switch unit 109 via a connection pattern.

  The switch unit 109 is connected to the control unit 45 and switches between the ON state and the OFF state according to the control of the control unit 45. When the control unit 45 detects the open state, the control unit 45 controls the switch unit 109 to be in an OFF state so that the first feeding point 106a and the feeding pad unit 110 are not electrically connected. Further, when detecting the closed state, the control unit 45 controls the switch unit 109 to be in an ON state so that the first feeding point 106a and the feeding pad unit 110 are electrically connected. Further, when the cellular phone device 1 is in the closed state, the first feeding point 106a and the feeding pad unit 110 are electrically connected via the switch unit 109, and the first spring coil 101a and the feeding pad unit 110 are high frequency. It is configured to connect to.

  Therefore, in the cellular phone device 1, the first spring coil 102 a and the first feeding point 106 a are not directly connected in the closed state, but the first spring coil 102 a and the first spring coil 102 a are connected via the feeding pad unit 110 and the switch unit 109. Since the first feeding point 106a is electrically connected, the first spring coil 102a can also be used as an antenna element. Further, since the mobile phone device 1 is configured such that the second spring coil 102b and the second feeding point 105b are electrically connected both in the open state and in the closed state, the second spring coil 102b can be used as an antenna element. Can be used.

In addition, the cellular phone device 1 includes antennas 103a, 103b, 104a, and 104b.
With this configuration, the cellular phone device 1 transmits data by combining four antennas (antennas 103a, 103b, 104a, and 104b), and another four antennas (first springs). The data can be received by combining the coil 101a, the second spring coil 101b, the first spring coil 102a, and the second spring coil 102b), and MIMO can be realized to widen the transmission / reception band.

  Further, the lengths of the first spring coil 101a, the second spring coil 101b, the first spring coil 102a, and the second spring coil 102b change due to the transition between the open state and the closed state (FIG. 9 ( a), (b)) When used as an antenna, the resonance frequency will shift. Therefore, the cellular phone device 1 employs a matching / power feeding method, which will be described in detail later, so that one end of the first spring coil 101a and the first power feeding point 105a (in the closed state, one of the first spring coils 101a). End and feeding pad portion 108), one end of the second spring coil 101b and the second feeding point 105b, one end of the first spring coil 102a and the first feeding point 106a (in the closed state, the first spring coil). By devising the connection state between one end of 102a and the power supply pad 110) and one end of the second spring coil 102b and the second power supply point 106b, this shift in resonance frequency can be absorbed.

  Therefore, the cellular phone device 1 has the original functions (restoration) of the first spring coil 101a, the second spring coil 101b, the first spring coil 102a, and the second spring coil 102b in both the open state and the closed state. Good communication can be performed by utilizing the antenna element without damaging the power. FIG. 9A shows an open state, and FIG. 8B shows a closed state.

  The cellular phone device 1 transmits data simultaneously by the first spring coil 101a, the second spring coil 101b, the first spring coil 102a, and the second spring coil 102b, and simultaneously transmits data by the antennas 103a, 103b, 104a, and 104b. May be received.

<Specific examples of matching and power supply methods>
Next, the matching / power feeding method will be described. In the following, for convenience of explanation, in the open state, the connection state (FIG. 8A) of one end portion of the spring coil 101 and the feeding point 105 is representative, and in the closed state, one end portion of the spring coil 101. And the connection state of the feeding point 105 (FIG. 8B) will be described as a representative.

  For example, as shown in FIG. 10A, one end side of the spring coil 101 and the feeding point 105 are connected by a plating straw 111. The plating straw 111 is a member whose outer side is plated with a metal in a hollow cylinder made of resin, for example.

  The spring coil 101 and the plating straw 111 are connected in high frequency by capacitive coupling. The feeding point 105 and the plating straw 111 are electrically connected by a connection line.

  Accordingly, since the capacitive coupling between the spring coil 101 and the plating straw alleviates the impedance mismatch (L portion in FIG. 10A), the cellular phone device 1 is good in both the open state and the closed state. Communication can be performed.

  Further, the mobile phone device 1 may have a configuration in which the spring coil 101 and the feeding point 105 are connected by a feeding land 112 as shown in FIG. In such a configuration, the feed land 112 and the feed point 105 are connected by the first feed line 113a and the second feed line 113b having a different length from the first feed line 113a.

  Here, the impedance matching circuit is formed between the feed land 112 and the feed point 105 by making the lengths of the first feed line 113a and the second feed line 113b different. For example, the cellular phone device 1 uses a path through which the high-frequency current received by the spring coil 101 reaches the feeding point 115 from the feeding land 112 via the first feeding line 113a, and the second feeding line 113b from the feeding land 112. Therefore, the impedance is matched and the impedance mismatch can be mitigated.

  Moreover, in order to function as an impedance matching circuit, it can be performed by adjusting the lengths of the first feed line 113a and the second feed line 113b. Here, it has been found through experiments that the second power supply line 113b is relatively long with respect to the first power supply line 113a, thereby contributing to a wider band.

  Therefore, since the cellular phone device 1 connects the power feeding land 112 and the power feeding point 105 by the first power feeding line 113a and the second power feeding line 113b having different lengths, impedance mismatch in the open state and the closed state (FIG. 10). (B) in (b) can be relaxed, and good communication can be performed in both the open state and the closed state.

<Other Example 3>
Next, a specific configuration for receiving the above-described AM broadcast wave will be described. In the following description, for convenience of explanation, it is assumed that only the spring coil 102 is used as an antenna element.

  As shown in FIG. 11, the mobile phone device 1 includes a feeding point 106 connected to one end of the spring coil 102, a switch unit 121 connected to the feeding point 106, and a switch unit 121 via a connection pattern. A power feeding pad portion 122 to be connected is provided. In the mobile phone device 1, a feeding point 106 is connected to the other end side of the spring coil 102 via a capacitor 123, thereby forming a loop antenna.

The capacitor 123 is set to have a capacity that allows the AM broadcast wave (522 kHz to 1629 kHz), which is a high-frequency signal, to pass while blocking the DC signal.
Moreover, it is preferable that the spring coil guide inserted in the hollow part formed with the spring coil 102 is comprised with the member containing a ferrite. Further, the outer shape of the spring coil guide 4c is preferably a round shape or a square shape.

  The switch unit 121 is connected to the control unit 45 and switches between the ON state and the OFF state according to the control of the control unit 45. When detecting the open state, the control unit 45 controls the switch unit 121 to be in an OFF state so that the feeding point 106 and the feeding pad unit 122 are not electrically connected. Further, when detecting the closed state, the control unit 45 controls the switch unit 121 to be in an ON state so that the feeding point 106 and the feeding pad unit 122 are electrically connected. Further, in the closed state, the cellular phone device 1 is configured such that the feeding point 106 and the feeding pad unit 122 are electrically connected via the switch unit 121, and the spring coil 102 and the feeding pad unit 122 are connected in high frequency. It has become.

  Therefore, when the cellular phone device 1 is in the open state (FIG. 11A), the switch unit 121 is in the OFF state, so that both ends of the spring coil 102 are connected to the feeding point 106 via the capacitor 123. On the other hand, in the closed state (FIG. 11B), the switch unit 121 is turned on, so that the feed point 106 is connected via the switch unit 121, the feed pad unit 122, and the capacitor 123. Since both ends of the spring coil 102 are connected to form a loop antenna, the spring coil 102 can also be used as an antenna element.

<Other Example 4>
Further, in the above-described embodiment, the two-stage slide type mobile phone device 1 in the open state and the closed state has been described. However, the form of the mobile phone device according to the present invention is not particularly limited to this, for example, three steps. The above multi-stage slide type may be used.

Here, how the application switching control is performed in accordance with the stage of the three-stage slide cellular phone device 1 will be described.
The cellular phone device 1 has an extended state (FIG. 12A) that is one of the open states, a semi-extended state that is one of the open states (FIG. 12B), and a closed state (FIG. 12C). )).

For example, the mobile phone device 1 receives an FM broadcast wave in an extended state, receives a low-band band (470 MHz to 620 MHz) of a terrestrial digital broadcast wave in a half-extended state, and a high band of a terrestrial digital broadcast wave in a closed state. Configured to receive a band (620 MHz to 770 MHz).
In addition, the mobile phone device 1 starts an application that receives an FM broadcast wave in response to the transition to the stretched state, and triggers an application to receive the FM broadcast wave, and triggers the transition to the half-stretched state or the closed state. It may be configured to start an application that receives.

  In this way, the cellular phone device 1 can connect the spring coils 101 and 102 to the antenna without impairing the original function (restoring force) of the spring coils 101 and 102 that smoothly transition the state even in a multi-stage slide type. Even elements can be used.

DESCRIPTION OF SYMBOLS 1 Cellular phone apparatus 2 Operation part side body part 3 Display part side body part 4 Slide module 4a Spring guide 4b Spring coil 4c Spring coil guide 4d Movable part 4e Wall surface 4f Opening part 4g Protrusion part 40a Main antenna 40b Subantenna 50 Communication 50a feeding point

Claims (1)

A first housing containing a display unit and a slide module;
A second housing having an operation unit;
A communication unit that communicates with the outside,
The first housing and the second housing are slidably connected in an open state and a closed state by the slide module,
The slide module has electrical conductivity, contracts when transitioning from the open state to the closed state, and extends when transitioning from the closed state to the open state, and an inner side of the spring coil And is configured by a combination of spring coil guides that support the spring coil,
One end of the spring coil is connected to a feeding point of the communication unit,
The communication unit is a portable communication terminal that uses the spring coil connected to the feeding point as an antenna element when communicating with the outside.

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