JP2014013676A - Mobile communication terminal device, connection control method for electric circuit, and coaxial connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To implement reduction in size and thickness of a frame structure by making it possible to minimize a wire length of wiring configuring an inner circuit of a device by solving a problem of wire length caused by a restriction of a mounting position of a coaxial connector, while making it possible to reduce the number of mounted coaxial connectors.SOLUTION: A radio circuit 13 is connected to an antenna 11 through a switch circuit 12 when a coaxial connector plug 14 is not fit in a coaxial connector receptacle 24 as shown in Figure 4(a). When the coaxial connector plug 14 is fit in the coaxial connector receptacle 24 as shown in Figure 4(b); the connection is disconnected by the switch circuit 12, and the radio circuit 13 is connected to an external apparatus (here, a radio apparatus tester 71) by the switch circuit 12 through the switch circuit. A CPU 10 controls the switch circuit 12 according to connection information (a voltage value) transmitted from the coaxial connector.

Description

  The present invention relates to a mobile communication terminal device, an electrical circuit connection control method, and a coaxial connector. In particular, the present invention relates to a mobile communication terminal device, an electric circuit connection control method, and a coaxial connector that can solve the problem of the wiring length caused by the restriction on the mounting position of the coaxial connector and can reduce the number of mounted coaxial connectors.

  In recent years, mobile communication terminal devices tend to be smaller and thinner. On the other hand, mobile communication terminal devices are also expected to have a tendency to reduce the degree of mounting freedom and increase the number of antennas (corresponding to multiple communication methods and frequencies), contrary to the above-mentioned trend of downsizing and thinning. Tend to. In particular, there are complicated restrictions on the mounting position of the coaxial connector.

  As a well-known example technique in this field, for example, in Patent Document 1, there is little signal loss from the transmission circuit to the antenna terminal, and the connection between the transmission circuit and the reception circuit, the two antenna terminals, and the two external connector terminals is simple. A wireless mobile device that can be switched with is disclosed. Specifically, in a wireless mobile device including an antenna and an external connector terminal, a plurality of switches for switching the connection between a transmission / reception antenna, a reception antenna and two external connector terminals, and a transmission circuit and a reception circuit A switch circuit having an element is provided. Further, a control means for controlling the operation of each switch element of the switch circuit is provided, and the switch circuit is electrically switched by a signal from the control means. Since only a switch circuit is interposed between the antenna terminal and the external connector terminal and the transmission circuit and the reception circuit, signal loss is small. Various usages are possible by connecting various external devices to the external connector terminal and changing the control method of the switch circuit.

  Further, for example, Patent Document 2 discloses an antenna device that has two or more antenna cables having different lengths and can select an antenna cable according to the environment of the installation location. Specifically, the voltage monitoring unit detects the voltage from the wireless device connected to one of the two connectors through the antenna cable or the antenna cable, and connects the antenna cable that has detected the voltage and the transmitting / receiving element. Generate a drive signal. The changeover switch unit switches the switch so as to connect the antenna cable that has detected the voltage and the transmission / reception element based on the drive signal from the voltage monitoring unit. Thereafter, the wireless device connected to the transmitting / receiving element becomes conductive through the antenna cable and the changeover switch unit, and data can be transmitted / received.

  Further, for example, Patent Document 3 discloses a technique for reducing intermodulation distortion of a semiconductor switch that switches the connection between an antenna of a mobile phone and an external device so that current consumption does not increase and standby time is not shortened. doing. Specifically, when an external device is connected to the terminal of the connector with a switch function, the switching detection unit detects that the potential of the terminal has been pulled up through the resistor, and the control unit detects the switching control unit. Instruct to short-circuit the common terminal and NO terminal of the antenna selector switch. On the contrary, when the terminal is opened, the common terminal of the antenna changeover switch and the NC terminal are short-circuited. In either case, the control unit recognizes whether the mobile phone is waiting or talking, and instructs the voltage control unit to switch the antenna to a relatively low value during standby and a relatively high power supply voltage during the call. Apply to the power terminal of the switch.

  Furthermore, for example, Patent Document 4 discloses a coaxial changeover switch that can reduce the number of parts, simplify the configuration, and reduce the cost. Specifically, it is a coaxial changeover switch that switches a plurality of circuits and connects to another plurality of circuits. A rotary shaft that rotates by a predetermined operation, two rotary switch terminals provided on the outer peripheral surface of the rotary shaft and connected to other circuits, and connected to each of a plurality of circuits and arranged around the rotary shaft And a plurality of fixed terminals connectable to the two rotary switch terminals. The rotation shaft rotates by a predetermined angle by a predetermined operation, and the two rotation switch terminals are connected to a plurality of fixed terminals.

Japanese Patent No. 3382964 JP 2001-111301 A JP 2005210381 A Japanese Patent No. 4254828

  By the way, a switch-type coaxial connector is mounted on a mobile communication terminal device in preparation for implementation of certification tests of various legal standards, individual adjustment of radio circuits, shipping inspection, and the like. Since the conventional switch-type coaxial connector employs a physical switching method, it is preferably mounted on the shortest distance between the antenna and the radio circuit in order to avoid power loss. However, the coaxial connector is a component that needs to be connected from the outside of the casing, and is required to be mounted at a location suitable for connection. This is a constraint on mounting.

  Due to the above-described performance securing and constraint conditions regarding the mounting position of the coaxial connector, the freedom of mounting is significantly lost for the coaxial connector, thus hindering downsizing and thinning of terminals. A case has arisen. Further, the coaxial connector requires a mounting quantity corresponding to at least the number of connections between the antenna and the radio circuit, which also hinders the downsizing and thinning mounting of the mobile communication terminal device.

  An object of the present invention is to provide a mobile communication terminal device, an electric circuit connection control method, and a coaxial connector that solve the above-described problems.

  In order to solve the above-described problem, a mobile communication terminal device according to the present invention includes a plurality of first circuit systems, a plurality of second circuit systems, a pair of a receptacle and a plug, and a receptacle. A coaxial connector that converts the fitting state with the plug into a predetermined electrical signal corresponding to the fitting state and outputs the same, and based on the instructions, a plurality of first circuit systems, a plurality of second circuit systems, And circuit connection switching means for switching the connection of the circuit system composed of the three of the coaxial connectors, and circuit connection control means for controlling the circuit connection switching means based on the electrical signal output from the coaxial connector.

  Further, the electrical circuit connection control method according to the present invention switches the connection of a circuit system composed of a plurality of first circuit systems, a plurality of second circuit systems, and a coaxial connector based on an instruction. The electrical signal output from the coaxial connector which has a circuit connection switching step to be performed and converts the mating state between the receptacle and the plug into a predetermined electrical signal corresponding to the mating state and outputs the electrical signal. And a circuit connection control step for controlling the circuit connection switching step based on.

  Further, the coaxial connector according to the present invention is configured by a pair of a receptacle and a plug, and means for converting the fitting state between the receptacle and the plug into a predetermined electric signal corresponding to the fitting state and outputting the same. Is provided.

  As is apparent from the above description, according to the present invention, it is possible to minimize the wiring length of the wiring constituting the internal circuit of the mobile communication terminal device and reduce the number of coaxial connectors mounted. There is an effect that the body structure can be reduced in size and thickness.

It is a block diagram which shows the whole structure of the mobile communication terminal device which concerns on embodiment of this invention. It is explanatory drawing explaining the function of the coaxial connector as an example of the conventional mobile communication terminal device, Fig.2 (a) shows the case where the coaxial connector plug is not fitted, FIG.2 (b) shows a coaxial connector * The case where the plug is fitted is shown. It is a block diagram which shows the internal structure as one structural example of the conventional mobile communication terminal device. FIG. 2 is an explanatory diagram for explaining the configuration and function of a coaxial connector as an example of a mobile communication terminal device according to an embodiment of the present invention, and FIG. 2 (a) shows a case where a coaxial connector / plug is not fitted; (B) shows the case where the coaxial connector plug is fitted. FIGS. 5A and 5B are configuration diagrams showing another example of the configuration of the coaxial connector according to the embodiment of the present invention, FIG. 5A shows a circuit configuration inside the receptacle of the coaxial connector, and FIG. 5B shows a plug of the coaxial connector. The internal circuit configuration is shown, and FIG. 5 (c) shows four types of usage of the coaxial connector. It is a block diagram which shows the circuit structural example as an Example of the mobile communication terminal device which concerns on embodiment of this invention.

  Hereinafter, a mobile communication terminal device, an electric circuit connection control method, and a coaxial connector according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a configuration diagram showing an overall configuration of a mobile communication terminal apparatus according to an embodiment of the present invention. In the mobile communication terminal device, coaxial connectors 1 and 2, CPU 10 (circuit connection control means), antennas 11, 21, and 31 (first circuit system), switch circuits 12, 22, and 32 (circuit connection switching) Means), radio circuits 13, 23, 33 (second circuit system). Although the number of each component is limited here, in general, the number of components of the internal component circuit is arbitrary in the mobile communication terminal apparatus according to the embodiment of the present invention.

  Hereafter, each component which the mobile communication terminal device of this embodiment has is demonstrated. The CPU 10 controls the switch circuits 12, 22, and 32 in accordance with connection information from the coaxial connectors 1 and 2. The antennas 11, 21, and 31 convert radio waves having a predetermined frequency into high frequency currents, and convert the high frequency currents into radio waves having a predetermined frequency. The switch circuits 12, 22, and 32 switch circuit connections based on the control of the CPU 10. The radio circuits 13, 23, and 33 convert the high-frequency current into a signal current that can be handled by a digital device or an analog device, or convert the signal current processed by the digital device or the analog device into a high-frequency current.

  Hereinafter, functions of the mobile communication terminal apparatus according to the embodiment of the present invention will be described, but before that, functions and configuration problems of the previous mobile communication terminal apparatus will be described for comparison. FIG. 2 is an explanatory diagram for explaining the function of a coaxial connector as an example of a conventional mobile communication terminal device. FIG. 2A shows a case where a coaxial connector plug is not fitted, and FIG. Indicates a case where a coaxial connector plug is fitted.

  As shown in FIG. 2A, when the coaxial connector plug 14 is not fitted to the coaxial connector receptacle 24, the radio circuit 13 is connected to the antenna 11. However, as shown in FIG. 2B, when the coaxial connector plug 14 is fitted into the coaxial connector receptacle 24, the radio circuit 13 is disconnected from the antenna 11 and is externally connected via the coaxial connector plug 14. Connected to the above devices (in this case, the wireless device tester 71).

  FIG. 3 is a configuration diagram showing an internal configuration as one configuration example of a conventional mobile communication terminal device. However, the reference numerals and their meanings attached to the circuit components shown in the figure are based on the mobile communication terminal apparatus (FIG. 1) according to the embodiment of the present invention. The conventional mobile communication terminal apparatus shown in FIG. 3 includes coaxial connectors 1, 2 and 3, antennas 11, 21 and 31, and radio circuits 13, 23 and 33. A coaxial connector mounting restriction location X exists in the arrangement area of the circuit components.

  In the conventional mobile communication terminal apparatus shown in FIG. 3, the coaxial connectors 1, 2, and 3 must be installed corresponding to the antennas 11, 21, and 31 and the radio circuits 13, 23, and 33. There is a problem that there are too many. Further, since the coaxial connector mounting restriction portion X exists on the circuit board, the wiring distance between the coaxial connector 1 and the antenna 11 and between the coaxial connector 1 and the radio circuit 13 becomes too long. The wiring distance between 11 and the radio circuit 13 is too long.

  FIG. 4 is an explanatory view for explaining the configuration and function of a coaxial connector as an example of a mobile communication terminal apparatus according to an embodiment of the present invention. FIG. 2 (a) shows a case where a coaxial connector / plug is not fitted. FIG. 4B shows a case where a coaxial connector plug is fitted. As shown in FIG. 4A, when the coaxial connector plug 14 (one of the coaxial connectors) is not fitted to the coaxial connector receptacle 24 (the other of the coaxial connectors), the radio circuit 13 is connected to the antenna 11 and the switch. The circuit 12 is connected.

  However, as shown in FIG. 4B, when the coaxial connector plug 14 is fitted with the coaxial connector receptacle 24, the above connection is made by the switch circuit 12 (a switch circuit that operates based on an instruction from the CPU 10). ). The wireless circuit 13 is switched by the switch circuit 12 so as to be connected to an external device (here, wireless device tester 71) via the switch circuit. Hereinafter, a circuit operation for realizing this switching will be described.

  First, as shown in FIG. 4A, when the coaxial connector plug 14 is not fitted to the coaxial connector receptacle 24, the antenna 11 and the radio circuit 13 are connected, and the CPU 10 has a resistance. The voltage value of the voltage divided by 81 and the resistor 82 is detected.

  On the other hand, as shown in FIG. 4B, when the coaxial connector plug 14 is fitted to the coaxial connector receptacle 24, the resistor 82 is the resistor 83 among the resistors forming the divided voltage. Can be switched to. Thereby, the divided voltage value is changed, and the CPU 10 detects the voltage value of the voltage divided by the resistor 81 and the resistor 83.

  Therefore, the CPU 10 can determine whether the coaxial connector plug 14 is fitted with the coaxial connector receptacle 24 or not by detecting each voltage value. More specifically, the CPU 10 can determine the connection state by comparing each detected voltage value with a voltage value stored in advance.

  When the fitting state of the coaxial connector plug 14 with the coaxial connector receptacle 24 is detected, the CPU 10 outputs a predetermined switch control signal to the switch circuit 12. The switch circuit 12 switches the circuit connection in the switch circuit 12 based on the switch control signal. That is, the wireless circuit 13 is disconnected from the antenna 11 and the wireless circuit 13 is connected to an external device (here, wireless device tester 71) via the coaxial connector plug 14.

  FIG. 5 is a configuration diagram showing a configuration of another example of the coaxial connector according to the embodiment of the present invention. 5A shows the circuit configuration inside the receptacle of the coaxial connector, FIG. 5B shows the circuit configuration inside the plug of the coaxial connector, and FIG. 5C shows four types of usage of the coaxial connector. Is. In the circuit configuration of the coaxial connector used for explanation of the function of the coaxial connector in FIG. 4, one configuration example of the coaxial connector corresponding to only one antenna is schematically shown. However, the coaxial connector shown in FIG. 1 shows a configuration example of a coaxial connector corresponding to a single antenna.

  In FIG. 5, the electrical resistance value between the receptacle and the plug of the coaxial connector is such that the resistance value from the resistance value of the resistor 91 is increased every time the plug connection direction angle at the time of fitting the receptacle and the plug increases by 90 degrees. , And gradually increase to the sum of the resistance values of the resistors 91-94. As with the circuit configuration shown in FIG. 4, the electrical resistance value is converted into voltage by a voltage dividing circuit, and the state is determined by the CPU 10 to control one switch circuit corresponding to the coaxial connector.

  Thus, by changing the plug orientation at the time of fitting, connection to a plurality of wireless circuits is possible using one coaxial connector. In this example, four types of connection information based on four types of resistance values depending on the plug connection directions in four directions are shown. However, by changing the resistance value between the receptacle and the plug continuously or discontinuously, one coaxial is used. The number of other circuits that can be connected and controlled by the connector can be arbitrarily set.

  FIG. 6 is a configuration diagram showing a circuit configuration example as an example of the mobile communication terminal apparatus according to the embodiment of the present invention. This figure is a diagram for explaining the effect of the present invention. Hereinafter, the effects of the present invention will be described with reference to a circuit configuration example as an example of the mobile communication terminal apparatus according to the present embodiment shown in FIG.

  As a first effect of the present invention, it is possible to keep the connection between the antenna and the radio circuit at the shortest distance without being restricted by the mounting restrictions of the coaxial connector. For this reason, since the degree of freedom of mounting increases, the effect of reducing the size and thickness of the housing structure can be expected. However, in FIG. 6, the coaxial connector cannot be mounted at the coaxial connector mounting restricted portion X, but the switch circuit can be mounted at the coaxial connector mounting restricted portion X.

  Further, as a second effect of the present invention, it is not necessary to depend on the number of connections of the antenna / radio circuit for the coaxial connector, and the number of mounted coaxial connectors can be reduced. For this reason, the effect of reducing the size and thickness of the housing structure can be expected.

  (Other Embodiments): In the above-described embodiment, the resistance value that changes between the receptacle and the plug is used as connection information, and the voltage value corresponding to the electrical resistance is obtained by converting the voltage with a voltage dividing circuit. The connection state of the coaxial connector is determined by the CPU 10 based on the measured voltage value. However, as another embodiment of the present invention, the resistance value is not converted into a divided voltage value, and the resistance value can be used as it is for determining the connection state of the coaxial connector. Alternatively, the current value of the current flowing through the resistor may be detected by using a current measurement circuit, and the circuit configuration may be used for determining the connection state of the coaxial connector.

  Further, the connection information is not limited to the resistance value, but may be a capacitance value detected using a detection circuit. Further, instead of the circuit configuration for detecting and controlling the voltage using the CPU 10 as described above, a circuit configuration for directly controlling the switch circuit from the voltage dividing circuit may be used.

  In each of the above-described embodiments, the case where the coaxial connector according to the embodiment of the present invention is applied to a mobile communication terminal device has been described. However, in general, the coaxial connector according to the embodiment of the present invention is not limited to any other electronic device. It can be applied to equipment.

1 Coaxial Connector 2 Coaxial Connector 3 Coaxial Connector 4 Coaxial Connector 10 CPU
11 antenna 21 antenna 31 antenna 12 switch circuit 22 switch circuit 32 switch circuit 42 switch circuit 13 radio circuit 23 radio circuit 33 radio circuit 14 coaxial connector plug 24 coaxial connector receptacle 71 radio equipment tester

Claims (8)

A plurality of first circuit systems;
A plurality of second circuit systems;
A coaxial connector that is configured by a pair of a receptacle and a plug, converts a fitting state between the receptacle and the plug into a predetermined electrical signal corresponding to the fitting state, and outputs the electrical signal.
Based on the instructions, circuit connection switching means for switching the connection of the circuit system composed of three of the plurality of first circuit systems, the plurality of second circuit systems, and the coaxial connector;
A mobile communication terminal apparatus comprising: circuit connection control means for controlling the circuit connection switching means based on the electrical signal output from the coaxial connector. The plurality of first circuit systems are a plurality of antennas,
The mobile communication terminal apparatus according to claim 1, wherein the plurality of second circuit systems are a plurality of radio circuits. The mobile communication terminal apparatus according to claim 1, wherein the coaxial connector outputs an electrical signal corresponding to a plug connection direction angle when the receptacle and the plug are fitted. The coaxial connector incorporates a resistance element circuit that changes an electrical resistance value between the receptacle and the plug according to the plug connection direction angle when the receptacle and the plug are fitted. Mobile communication terminal device. A circuit connection switching step for switching the connection of a circuit system composed of three members of a plurality of first circuit systems, a plurality of second circuit systems, and a coaxial connector based on the instructions;
The circuit based on the electrical signal output from a coaxial connector that has a pair of a receptacle and a plug and converts a fitting state between the receptacle and the plug into a predetermined electrical signal corresponding to the fitting state and outputs the signal. A circuit connection control step for controlling the connection switching step. A coaxial connector comprising a pair of a receptacle and a plug, and means for converting a fitting state between the receptacle and the plug into a predetermined electrical signal corresponding to the fitting state and outputting the same. The coaxial connector according to claim 6, wherein the coaxial connector outputs an electrical signal corresponding to a plug connection direction angle when the receptacle and the plug are fitted. The coaxial connector according to claim 7, further comprising a resistive element circuit that changes an electrical resistance value between the receptacle and the plug according to an angle of the plug connection direction when the receptacle and the plug are fitted.

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