JPH0522994Y2 - - Google Patents

Description

[Detailed explanation of the idea]

【0001】

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless communication device, and more particularly to a wireless communication device equipped with a transmission power changeover switch.

【0002】

2. Description of the Related Art Wireless communication devices include portable types such as transceivers, portable types installed in automobiles, etc., and fixed types installed in base stations and the like. The transmission output selector switch is mounted on the operation panel for portable or stationary types. In the case of a portable type, it is appropriately mounted on the main body together with other operating members. Additionally, the wireless communication device is equipped with a PTT switch for transmission control. The PTT switch is a non-lock switch, and depending on the operation of the PTT switch, the antenna circuit is switched from the transmitting circuit to the receiving circuit, and the crystal oscillator related to the transmitting circuit is controlled. Since the PTT switch is frequently used, it is constructed with a structure that is easy to operate and is installed on the hand microphone or transceiver body. In addition to the PTT switch, the hand microphone is also provided with other operating members, which can be used to, for example, call a group number on a personal radio.

[0003] PTT function and transmission output control belong to the same category, and if the transmission output selector switch and PTT switch are provided separately, operability is poor.
It also has drawbacks such as the need for mounting space.

[0004]

[Problems to be Solved by the Invention] An object of the present invention is to eliminate the above-mentioned drawbacks and provide a wireless communication device that is equipped with a PTT switch having a transmission output switching function in a portable transceiver and has fewer operating members.

[0005]

[Means for Solving the Problems] A PTT switch provided in a wireless communication device includes a first switch and a second switch that start different ON operations depending on the stroke difference caused by pressing. The first switch transmits high power and displays low power when it is on, and the first switch and the second
When both switches are turned on, the configuration is such that high power transmission and high power display are performed, and for low power transmission, the first switch is turned on by pressing the same amount as one switch, and for high power transmission, the first switch is turned on by pressing the same amount as two switches. This is the required configuration.

【0006】

Embodiment An embodiment of a wireless communication device according to the present invention will be described with reference to FIG. In the figure, 1 is an antenna and 2 is an antenna switch. The antenna switching device 2 has a movable contact 2c, a normally closed contact 2a, and a normally open contact 2b, and when the antenna switching device 2 is inactive, the receiving circuit 3 and the AF amplifier 4
and performs a receiving operation via the speaker 5.
When the antenna switch 2 becomes active, the normally open contact 2b is closed. When the normally open contact 2b is closed, a transmission circuit is formed that passes through the microphone 6, microphone amplifier 7, drive module 8, final module 9, and antenna 1. 10 is a PTT switch.

[0007] The PTT switch 10 is installed in a portable transceiver or hand microphone. microphone 6
A key member 11 (not shown) is provided exposed on the side surface of the key member 11 and has a structure including pressing arms 11a and 11b. The key member 11 is normally biased in the direction shown by the dotted arrow, and when there is no pressing force, the first switch 1
The second fixed contact 12b and the movable contact 12a are in an open state. Also, the movable contact 13 of the second switch 13
a and the fixed contact 13b are also in an open state.

[0008] Here, press the PTT switch 11,
If the pressure is weak, the pressing arm 11a pushes the movable contact 12a of the first switch 12, and the fixed contact 12b is pressed.
When the first switch 12 comes into contact with the first switch 12, the first switch 12 closes. When the pressing force is further increased, the first switch 12 is in the closed state as described above, but the pressing arm 11b newly presses the movable contact 13a of the second switch 13 and contacts the fixed contact 13c, so that the second switch 12 is closed. Close.

[0009] When only the first switch is closed by weak pressure, the antenna switching device 2 and the oscillator 9a are activated. That is, the movable contact 2c of the antenna switch 2 is switched from the normally closed contact 2a to the normally open contact 2b, and the antenna 1 is switched from the receiving circuit 3 to the final module 9 for transmission. Further, the oscillator 9a is caused to oscillate, and the transmission circuit related to the microphone 6 is connected to enter a transmission state, and radio waves are transmitted from the final module 9 via the antenna 1. The final module 9 is adjusted so that the transmission power at this time is a small output. Next, when the switch is pressed even more strongly, the second switch 13 is closed, and by closing the first switch 12 and the second switch 13, the final module 9 is controlled to have a large output power.

[0010] Normally, the settings for low power and high power are adjusted at the time of manufacturing and are configured so that they cannot be changed.
It may include a circuit that can be adjusted by a transmission power regulator (not shown). 14 in the diagram is
It is an indicator such as an LED, and when the transmission power is weak, it emits red light when the green is strong.

[0011] In the above embodiment, the strength of the transmission power is switched, but it is also possible to apply mode switching or the like. In addition, the first switch 12 and the second switch 13
Although a mechanical contact type is used, other elements may be used in other directions as long as it is possible to distinguish between two sets based on the pressure difference.

[Effect of the invention] The wireless communication device according to the invention is
A weak press on the PTT switch turns on the first switch for low power transmission, and a strong press turns on both the first and second switches for high power transmission, so a separate transmission strength switch is required. There is no need to prepare, and the transmission can be switched to high power or low power just by pressing the PTT switch, resulting in good operability.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a wireless communication device showing an embodiment of the present invention.

[Explanation of symbols]

1...Antenna 2...Antenna switching circuit 3... Receiving circuit 4...AF amplifier 5...Speaker 6...Mike 7...Microphone amplifier 8...Drive module 9...Fainar module 9a...oscillator 10...PTT switch 11...Key member 11a, 11b...pressing arm 12...First switch 13...Second switch.

Claims (1)

[Scope of utility model registration request] 1. A first switch that performs low power transmission and low power display when turned on by pressing a first pressing arm of a PTT switch provided in a wireless communication device, and a first switch that operates with a longer stroke than the first pressing arm. Turns on by pressing the second pressing arm to start
The configuration includes a second switch that transmits high power and displays high power in conjunction with the on operation of the first switch, and when transmitting, the first switch is turned on by pressing the PTT as much as one switch. 1. A wireless communication device, which transmits a small amount of power in operation, and turns on the first and second switches by pressing two PTT switches to transmit a large amount of power.