JP2596215B2 - Portable radio telephone equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable radio telephone device, and more particularly, to a telephone device configured to control a voice output of a receiver.

[Prior Art] Portable radiotelephones are compact when not in use, and when used, the handset is located near the ear, and the handset is placed near the mouth to transmit sound faithfully. is required. Since the transmitter is placed near the mouth and the receiver is placed near the ear, the device cannot be miniaturized due to the positional relationship between the human ear and the mouth.

For this reason, a portable radio telephone having a structure as shown in FIG. 5 has been proposed. In this configuration, a receiver housing 11 including a receiver 10 and a transmitter housing 13 including a transmitter 12 can be folded by a hinge 14. The numeric keypad 15 is a switch for selecting a telephone number, and the display unit 16 is a display composed of a liquid crystal or the like, and is used to display the telephone number input from the numeric keypad 15 and the state of the apparatus.

FIG. 6 is a diagram showing a use state of the portable radio telephone device of FIG. When not in use, the transmitter housing 13 and the receiver housing 11 are folded so as to overlap, as shown in FIG. At the time of use, as shown in FIG.
The transmitter housing 13 and the receiver housing 11 are opened at a required angle using the hinge portion 14, the transmitter 12 is brought closer to the mouth of the user, and the receiver 10 is put on the ear.

In addition, the output of the sound output from the receiver 10 may be changed by a method of changing the sound depending on the noise of the surrounding environment, or may be set by the user by changing the volume or the like. Was fixed.

[Problems to be solved by the invention]

In a portable wireless telephone device having this type of folding mechanism, when the user holds the transmitter housing 13 and strongly presses the receiver 10 against his ear during use as shown in FIG. The force F applied to the receiver section is applied as an unreasonable force to the hinge section 14, and the hinge section and the like may be damaged.

Such damage is likely to occur when the user presses the receiver strongly against the ear when the volume of the receiver 10 is low.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a portable radio telephone device in which damage caused by such a force applied to a handset is prevented.

[Means for solving the problem]

A portable wireless telephone device according to the present invention includes a pressure detector for detecting pressure applied to a receiver when the receiver is pressed against an ear of a user, and a sound output from the receiver according to a detection value of the pressure detector. Control means for controlling the
This control means is a control circuit that controls the gain of the amplifier that outputs the sound of the receiver based on the detection value from the pressure detection unit, and is controlled so as to increase the sound output when the pressure detection value is large. Configuration.

[Action]

According to the present invention, when the user presses the receiver strongly against the ear, the detection value from the pressure detector increases, and the sound output from the receiver increases accordingly. The contact force on the handset to prevent excessive force from being applied to the handset.

〔Example〕

 Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an electric configuration of the present invention, and shows an example in which the present invention is applied to a folding type portable radio telephone device as shown in FIG. A mobile phone circuit unit 1 including a wireless circuit for transmitting and receiving radio waves and a control unit for controlling a wireless furnace transmits a received audio signal to an amplifier unit 2. The signal sent from the mobile phone circuit unit 1 is amplified by the amplifying unit 2
And drives the speaker 3 as a receiver. The speaker 3 converts the sound electric signal sent from the amplifier 2 into sound and outputs the sound.

On the other hand, the pressure detector 4 is configured as a transducer that detects pressure and outputs the magnitude of the pressure as an electric signal. As described later, the pressure detecting unit 4 has a mechanical configuration, a piezoelectric element that generates a voltage when a pressure such as ceramic is applied, or a pressure-sensitive sheet using such a piezoelectric element. Is used.

The pressure signal detected by the pressure detection unit 4 is sent to the control unit 5, and the control unit 5 controls the gain of the amplifier 2 according to the pressure signal and changes the magnitude of the audio electric signal output to the speaker 3. be able to.

The variable resistor 6 is a setting operation part for setting an initial value of the audio output. The release switch 7 is a reset switch for stopping the control of the gain by the pressure and returning to the initial value. As described above, the sound output from the speaker 3 is changed from the initial value by the pressure detected by the pressure detector 4.

FIG. 2 shows two typical examples of the relationship between the pressure applied to the pressure detection unit and the sound output. These characteristics can be realized by changing the control of the control unit 5.
The characteristic a is a characteristic in which the initial value is maintained until a certain pressure is applied, and the sound output increases in proportion to the pressure when a certain pressure or more is applied. The characteristic b is a characteristic in which the initial value is maintained at a certain pressure or less, and thereafter, the audio output increases stepwise. These characteristics are determined by examining the characteristics of the human ear.

 Next, the structure of the pressure detector will be described.

FIG. 3 is an example of a mechanical pressure detection configuration. In the handset housing 11, a handset pad 11A is provided on the front surface of the handset, and the handset pad 11A is attached to the handset housing 11 by a compression spring 17A.
Supported by An operating rod 18 protrudes inward from the receiver pad 11A, and a rack 19 is formed on a part of the operating rod 18. Further, a pinion 20 meshed with the rack 19 is provided inside the receiver housing 11,
A rotary shaft of a variable resistor (not shown) is mounted on the pinion 20.

According to this configuration, the receiver pad 11A is pushed upward in the figure by the normal compression spring 17. When the user puts the receiver pad 11A strongly against the ear, the receiver pad 11A is pushed downward by pressure, and the operating rod 18 is pushed downward. Therefore, the pinion 20 meshed with the rack 19 is rotated rightward in the drawing, and the rotation axis of the variable resistor is rotated by an angle corresponding to the rotation angle of the pinion 20, and the resistance value changes. When the pressure decreases, the rack 19 moves upward, and the pinion 20 rotates counterclockwise to change the resistance value back.

As described above, the contact force applied to the receiver pad 11A can be directly detected as a change in the resistance value, and the gain of the amplifier 2 may be changed by the change in the resistance value.

As shown in plan and side views in FIGS. 4 (a) and 4 (b), a pressure-sensitive sheet 21 for outputting an output by pressure is provided between the receiver pad 11A and the receiver housing 11, and the receiver pad 11A is provided on the receiver pad 11A. It may be configured to detect the applied pressure and output this as a voltage change.

Therefore, in the portable wireless telephone device configured as described above, when the user presses the receiver strongly against the ear because the sound of the receiver is hard to hear, the pressure detector 4 detects the pressure and the controller 5 amplifies the pressure. In order to increase the gain of 2, the voice output from the speaker 3, that is, the receiver 10, increases. For this reason, the user relaxes the force applied to the handset 10, thereby reducing the force applied to the hinge portion 14,
The damage can be prevented.

Here, when pressure is applied to the receiver, the voice level increases, and the user keeps his ear away from the receiver. Then
Since the pressure applied to the handset portion is reduced, the sound output is reduced, and the user may again repeatedly touch the handset portion to the ear. For this reason, it is preferable that, once the pressure is detected by the pressure detection unit, the sound output at the time when the pressure is detected is maintained for a certain period of time even if the pressure decreases. However, when the detected pressure is increasing from the previous pressure, it is necessary to perform control so as to increase the sound output.

Although the above embodiment shows an example in which the present invention is applied to a telephone device having a hinge structure, the present invention can also be applied to a telephone device having no hinge structure. In other words, in a mobile phone device, the ambient noise and the received voice may change with movement, and in such a case, the voice output is controlled according to the force of pressing the receiver against the ear. By doing so, it is possible to always obtain a suitable audio output without adjusting the volume or the like each time, and it is possible to enhance the utility value of the telephone device.

〔The invention's effect〕

As described above, the present invention detects the pressure applied to the receiver and controls the sound output from the receiver according to the detected value, so that when the user strongly touches the receiver to the ear, By increasing the sound output from the handset with an increase in the detection value of the pressure detection unit, the user weakens the contact force with the handset, and an excessive force is applied to the hinge and the like, and the telephone device is damaged. This has the effect of being able to prevent this from happening.

[Brief description of the drawings]

FIG. 1 is a block diagram of an electric system according to an embodiment of the present invention.
FIG. 3 is a characteristic diagram of the detected pressure and the sound output. FIG. 3 is a cross-sectional view showing an example of a mechanical configuration of the pressure detecting unit. FIGS. FIG. 5 is a perspective view of a conventional folding type telephone device, and FIGS. 6 (a) and 6 (b) are side views showing the telephone device when folded and used, respectively. is there. 1 ... mobile phone circuit section, 2 ... amplification section, 3 ... speaker (receiver), 4 ... pressure detection section, 5 ... control section, 6 ...
Variable resistor, 7 ... Release switch, 10 ... Handset, 11 ...
... handset housing, 11A ... handset pad, 12 ... transmitter, 13 ... handset housing, 14 ... hinge part, 15
…… numeric keys, 16 …… display part, 17 …… compression spring, 18 ……
Operating rod, 19 ... Rack, 20 ... Pinion, 21 ... Pressure-sensitive sheet.

Claims (1)

(57) [Claims] A pressure detector for detecting a pressure applied to a receiver of a portable radio telephone device when the receiver is pressed against an ear of a user, and a sound from the receiver according to a detection value of the pressure detector. Control means for controlling the output, wherein the control means is a control circuit for controlling the gain of the amplifier for outputting the voice of the handset based on the detection value from the pressure detection unit, when the pressure detection value is large A portable wireless telephone device controlled to increase the voice output.