JPH0673935U - Frequency setting device using joystick - Google Patents

Abstract

(57) [Summary] [Purpose] When setting the frequency, it is possible to set all frequencies from fast forward to fine adjustment by only operating the joystick attached to the microphone. . [Structure] A joystick that operates in the front-rear direction and the left-right direction and selects one of the four variable resistance circuits to change the resistance value is attached to a handy microphone, and is proportional to the resistance value set by the joystick. The voltage can be taken out from the movable contacts of the variable resistance circuit.Further, these movable contacts are connected to a capacitor for time constant and a converter, and the frequency of the frequency setting circuit is fast forwarded from the output side of each comparator. And a configuration in which each control terminal for fine adjustment is connected.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a frequency setting device in a wireless communication device.

[0002]

[Prior art]

 Conventionally, in a wireless communication device, there is a frequency setting method as shown in FIG. 3 for setting a transmission / reception frequency. In the figure, 25 is a frequency setting dial knob which is provided only on the operation section of the main body of the wireless communication device. For this operation, use the FAST key or the up / down keys in the MHz band to roughly approach the target frequency, then turn the dial knob for frequency setting to set the target frequency.

Reference numeral 26 in the figure is a switch for moving up / down the frequency of the wireless communication device, and is a switch for fast-forwarding in the upward or downward direction of the frequency and four switches for fine adjustment. Use this switch to adjust the setting from fast-forward adjustment to fine adjustment.

Reference numeral 27 in the figure denotes a keyboard switch for inputting and setting a target frequency in numerical values from the upper digit to the lower digit. In addition to this, there is another method for setting the frequency, in which the stored frequency is stepwise read and set, but since it is not directly related to the present invention, description thereof will be omitted.

[0005]

[Problems to be solved by the device]

 The present invention has described three sets of frequency setting methods in the above-mentioned prior art, but each requires a plurality of switches for operation, or a plurality of different operation methods. It is an object of the present invention to provide a frequency setting device which is a simple method of operating one switch to set the frequency in order to eliminate such inconvenience.

[0006]

[Means for Solving the Problems]

 According to the present invention, a microphone is equipped with a joystick that is equipped with four variable resistance circuits, operates a stick lever, and selects one of them to set a resistance value, which is proportional to the resistance value set by the stick lever. Connect the power supply and the reference potential so that the voltage is output to the movable contact, and connect the time constant capacitor from each movable contact and the comparator that outputs the control signal when there is an input exceeding the predetermined threshold value. The output side of the comparator is connected to each control terminal for fast-forwarding and fine adjustment that changes the frequency of the frequency setting circuit of the wireless communication device up or down.

[0007]

[Action]

 When the frequency to be changed is determined, it is determined which of the high and low frequencies the current operating frequency displayed on the frequency display is to be moved, and if the frequency is moved to the higher frequency, the If the fast forward operation direction of the stick is forward and backward and the movement to a higher frequency is the forward direction, the stick lever is tilted to the front side. If the frequency increases in the right direction, tilt the stick lever to the right and adjust until the desired frequency is set.

[0008]

【Example】

 FIG. 1 is a block diagram showing an embodiment of the frequency setting device of the present invention. In the figure, 1 is a handy microphone, 2 is a main body of a wireless communication device, 3 is a joystick, and 4 is a joystick stick lever. Reference numerals 5, 6, 7, and 8 are variable resistance circuits that are selectively variable by the staple lever 4 according to the operation direction, and reference numerals 5 and 6 are variable resistance circuits for fast-forwarding that change the frequency up and down. Further, 7 and 8 are variable resistance circuits for fine adjustment which change the frequency vertically.

One terminal of each of the variable resistance circuits 5, 6, 7, and 8 of the joystick 3 described above is connected to the reference potential, and the other terminal is connected to the power supply Vcc through the resistor 9, and the movable contact Is connected so that the output is supplied to the respective comparators 14, 15, 16 and 17. At this time, the movable contacts of all the variable resistance circuits 5, 6, 7, and 8 are at the reference potential when the stick lever 4 of the joystick 3 is in the inoperative state, and the joystick 3 is operated to move one variable resistance circuit. When the contact moves, a voltage proportional to the change in resistance due to the manipulated variable is output from the movable contact.

At the input terminals of the comparators 14, 15, 16 and 17 to which the movable contacts are connected, a resistor 9 and a variable resistance circuit set by the stick lever 4 among the variable resistance circuits 5, 6, 7 and 8 are provided. Capacitors 10, 11, 12, 13 that form a time constant circuit with the combined resistance of the resistance value of 1 and the resistance value of 1. Even if the stick lever 4 of the joystick 3 moves by mistake for some reason after setting the frequency, this time constant circuit does not change the set frequency if it is a short time. It was set up like this.

The comparators 14, 15, 16, and 17 are provided with threshold values for limiting the operation by the resistors 19, 20, 21, and 22, respectively. Therefore, when any one of the movable contacts of the variable resistance circuits 5, 6, 7, 8 of the joystick 3 has an output exceeding the threshold value and is input to the comparator, the control signal is output from the comparator. If it is an output from the comparators 14 and 15, it is used as a control signal terminal for fast-forwarding to change the frequency of the frequency setting circuit 18 up or down. Connect to each of the control signal terminals for fine adjustment.

The operation will be described based on the above configuration. If you want to change to a higher frequency than the current operating frequency displayed on the frequency display (not shown) on the operation panel of the main body 2 of the wireless communication device, for example, you can attach it to the handy microphone 1 The stick lever 4 is tilted to the side of the variable resistance circuit 5 or 6 which is set by the joystick 3 in the fast-forward operation so as to change to a higher frequency. When the display of the frequency display (not shown) approaches the frequency to be changed, the stick lever 4 is turned off, and then the stick lever 4 is moved to the side of the variable resistance circuit 7 or 8 for fine adjustment. The adjustment ends. Even if the stick lever 4 moves by mistake in the call state after setting the frequency, the frequency is maintained if it is short time. Just by using the joystick 3 as described above, all frequencies can be set from fast forward to fine adjustment.

FIG. 2 is an explanatory block diagram for operating the frequency setting device. Figure 1 shows a handheld microphone and 2 is the main body of a wireless communication device. 3 is a joystick. Reference numeral 23 is a PTT switch, and 24 is a microphone.

[0014]

[Effect of device]

 Since it is a frequency setting device that sets the frequency using the joystick attached to the handy type microphone according to the present invention, it is possible to set the frequency to the high frequency or the low frequency by operating only one stick lever, and for fast-forwarding and fine adjustment. 4 types of actions can be executed. Therefore, the operation is simpler than the conventional method in which a plurality of control knobs or push-button switches are operated or an adjustment method that combines different operation methods is used. There is a practical effect that can exert its power.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a frequency setting device of the present invention.

FIG. 2 is a block diagram for explaining the operation of the present invention.

FIG. 3 is a configuration diagram for explaining various frequency setting methods in a conventional technique.

[Explanation of symbols]

 1 Microphone 2 Main body of wireless communication device 3 Joystick 4 Stick lever 5, 6, 7, 8 Variable resistance circuit 9 Resistance 10, 11, 12, 13 Capacitor 14, 15, 16, 17 Comparator 18 Frequency setting circuit 19, 20, 21, 22 Resistance 23 PTT switch 24 Microphone 25 Dial knob 26 Up-down switch 27 Keyboard switch

Claims (1)

[Scope of utility model registration request] 1. A microphone is equipped with a joystick having four variable resistance circuits, one of which is selected by a stick lever operation to set a resistance value, and a movable contact of each of the variable resistance circuits is attached. A comparator that is connected to a power source and a reference potential so that a voltage proportional to the variable resistance value can be taken out, and outputs a control signal when there is a time constant capacitor and an input exceeding a predetermined threshold value from each movable contact. , And the output side of the comparator is connected to two sets of control terminals for fast-forwarding and for fine-tuning for changing the frequency of the frequency setting circuit up and down for each orthogonal operation direction of the stick lever. Frequency setting device using.