JPH0238535Y2 - - Google Patents

Description

[Detailed description of the invention] <Field of industrial application> The present invention relates to an in-vehicle telephone, and is particularly operable, and is capable of reliably muting the transmitted voice without interfering with driving. Regarding in-vehicle telephones that can be used.

<Prior art> Although car phones have been in practical use for a limited number of people since ancient times, their penetration rate has been extremely low. Incidentally, recently, there has been an increasing demand for its generalization due to the expansion of motorization, business, security, etc. For this reason, a car telephone system called a cellular system has been developed, and has become particularly popular in the United States. In this cellular system, the service area is subdivided into multiple cells with a radius of approximately 6.4 km, and each cell is equipped with one wireless telephone station (base station), which receives radio waves from the phone inside the car as the car moves. This is a method of communicating with the other party by changing the number one after another, and it is possible to communicate over a wide range, increase the number of channels, and furthermore, the number of lines can be increased infinitely.

FIG. 3 is a plan view of an in-vehicle telephone used in such a cellular system, and the telephone has a base unit 11 and a handset 21 that is placed on the base unit 11 and is removed when making a call. The handset 21 is normally fixed to the base unit 11 by a locking mechanism (not shown) so that it cannot be removed by a shock, and when removed, the lock can be released by pulling a lock release lever 31.

Now, such in-vehicle telephones are provided with a mute function for muting the transmitted voice. With this Mute function, when you have to have a conversation that you don't want the other party to hear during a call, or when a situation occurs where you want to make people aware of your surroundings, you can prevent the voice on the transmitting side from being transmitted to the other party. can do. And for this purpose, a mute key 41 for enabling the mute circuit.
is provided, and if necessary, the mute key is pressed to enter the mute state. In FIG. 3, 11a is an on/off switch, 11b is an alert volume that controls the speaker level of the ringer, 11c is a handset volume that controls the receiving volume of the handset 21, and 11d is a speaker volume that adjusts the speaker volume. , 11
e is a display section, which displays, for example, power-on, mute operation, etc. Further, 21a is a number key section, 21b is a number display section, and 21c is a function key section, in which the above-mentioned mute key 41 is provided.

<Problems to be Solved by the Invention> However, in the conventional in-vehicle telephone, the mute key 41 must be provided independently as described above, which is disadvantageous in terms of cost.

Further, since the mute key 41 must be placed adjacent to other function keys on the function key portion 21c, the position of the mute key must be confirmed and then the key must be pressed to enter the mute state. However, there were safety issues when operating the vehicle while driving, and furthermore, it was difficult to operate the vehicle quickly when the vehicle was in a hurry.

From the above, the purpose of the present invention is to eliminate the need for a special Mute key, to make it safe even when operating to enter the Mute state while driving, and to have good operability so that it can be operated quickly in times of emergency. The purpose is to provide an in-vehicle phone that is capable of

<Means for Solving the Problems> The present invention is an in-vehicle telephone that includes a handset and a base unit on which the handset is placed. The handset is provided with a lock release button for releasing the locked state of the handset by the lock mechanism, a mute circuit, and a switch that is activated by pressing the lock release button to enable the mute circuit.

<Operation> In order to remove the handset which is fixed to the base unit by the lock mechanism, the lock release button provided on the handset must be pressed to release the locked state by the lock mechanism. In other words, in order to make a call, the user must press the unlock button, and during the call, the user must hold the handset while talking to the other party. Therefore, during a call, the position of the lock release button can be recognized by touch without checking visually. In particular, by providing the lock release button at a position where it can be easily operated with the index finger immediately after gripping the handset, its position can be easily recognized.

Now, in the present invention, since the mute circuit is enabled by pressing the lock release button, it is possible to press the lock release button and mute without checking visually during a call.

<Example> Figure 1 is a perspective view of the in-vehicle telephone of the present invention;
The figure is a circuit block diagram.

In FIG. 1, 101 is a base unit, 2
01 is a handset, handset 201
is removed from the base unit 101 and its back side is shown.

The surface of the handset 201 has approximately the same structure as the conventional example shown in FIG. However, no Miyuto key is provided.

The speaker section 20 is located on the back side of the handset 201.
1a, a microphone 201b is provided, and a speaker section 2
A lock claw 201 is provided on the inner side of 01a so that it can be moved in and out.
c is formed, and a lock release button 301 is provided on the side of the handset. Note that when the lock release button 301 is pressed, the lock pawl 201c, which normally protrudes due to spring force, is retracted. Also, as soon as you grasp the handset 201, the lock release button 30 is placed in a position where it can be easily operated with your index finger.
1, the operability can be improved.

The base unit 101 includes a panel portion 101a,
It has a speaker receiving section 101b and a microphone receiving section 101c, and a transmitting circuit, a receiving circuit, a mute circuit, etc. are incorporated inside. Speaker receiving part 101b
When the handset 201 is placed on the base unit 101, there is a lock claw 201c on the side of the base unit 101.
An engagement hole (not shown) is provided so as to engage with.

Therefore, when making a call, the lock release button 301 is pressed to retract the lock claw 201C, thereby releasing the engagement between the lock claw 201C and the engagement hole formed in the base unit 101, and then pressing the lock release button. While doing so, the user removes the handset 201, and thereafter performs predetermined operations to talk to the other party.

Then, when the call is over, the handset 201 is placed on the base unit 101 and pressed lightly, and the lock pawl 201C engages with the engagement hole and locks.

Now, if you want to mute the transmitted audio during a call, press the lock release button 301. When the lock release button 301 is pressed, the switch 401 (see FIG. 2) built into the handset 201 is turned on, and the on signal (mute enable signal) is turned on.
MIS) is input to the mute circuit 501. As a result, from now on, the mute circuit 501 transmits the audio signal from the transmitting side collected by the microphone 201b to the transmitting circuit 601 until the lock release button 301 is released.
Do not enter.

Therefore, as long as the unlock button 301 is pressed, the sound from the transmitting side will not be received by the other party. In addition, in FIG. 2, 701 is an antenna.

<Effects of the invention> According to the invention, a lock mechanism for fixing a handset to a base unit, a lock release button provided on the handset for releasing the locked state of the handset by the lock mechanism, a mute circuit, and a lock release button are provided. Since the in-vehicle telephone is configured with a switch which is activated by pressing the switch to enable the mute circuit, there is no need to provide a special key such as a mute key as in the past, which is advantageous in terms of cost.

In addition, since you must press the release button to make a call, you can recognize the position of the unlock button by feel without checking the position with your eyes during a call. It can be activated by pressing the release button, providing excellent driving safety.

In addition, the lock release button is placed in a position that is easy to operate with your index finger as soon as you grip the handset.
It has good operability and can be operated quickly in emergencies.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a vehicle-mounted telephone according to the present invention, FIG. 2 is a block diagram illustrating the operation of the vehicle-mounted telephone according to the present invention, and FIG. 3 is a plan view of a conventional vehicle-mounted telephone. 101...Base unit, 201...Handset, 201c...Lock claw, 301...Lock release button, 401...Switch, 501...Mute circuit, 601...Transmission circuit.

Claims (1)

[Scope of utility model registration request] An in-vehicle telephone having a handset and a base unit on which the handset is placed,
A locking mechanism for fixing the handset to the base unit, a lock release button provided on the handset for releasing the handset locked state by the locking mechanism, and a muting circuit for muting transmitted audio;
An in-vehicle telephone characterized by having a switch that is activated by pressing a lock release button to enable a mute circuit.