JPH04207657A - Portable radio telephone set - Google Patents

Abstract

PURPOSE:To prevent a telephone set from being damaged in advance due to an irrational force exerted to a hinge or the like by detecting a pressure exerted to a receiver and controlling a voice output from the receiver in response to a detection value so as to allow the user to weaken a press contact force onto the receiver. CONSTITUTION:A pressure detection section 4 acts like a transducer to detect a pressure and to output the pressure as an electric signal. A pressure signal detected by the pressure detection section 4 is fed to a control section 5, which controls the gain of an amplifier 2 in response to the pressure signal to vary a voice electric signal outputted to a speaker 3. Thus, when the user presses the receiver strongly onto an ear, the detected signal from the pressure detection section is increased and the voice output from the receiver is increased attended therewith, then the user weakens the press contact force onto the receiver thereby preventing it that an excess force is exerted to the receiver. Thus, a damage caused by a force exerted to the receiver is prevented in advance.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] - The present invention relates to a portable radio telephone device, and more particularly to a telephone device configured to be able to control the audio output of a receiver.

[Conventional technology]

A portable radio telephone device must be small when not in use, and when in use, the receiver must be placed near the ear and the transmitter must be placed near the mouth to faithfully transmit and transmit sound. To place the handset near your mouth and the receiver near your ear,
The device cannot be made smaller than the positional relationship between the human ear and mouth.

For this reason, a portable radio telephone device having a structure as shown in FIG. 5 has been proposed. This is configured such that a receiver housing 11 containing a receiver 10 and a transmitter housing 13 containing a transmitter 12 are foldable by a hinge portion 14. The numeric keypad 15 is a switch for selecting a telephone number, and the display section 16 is a display device composed of a liquid crystal or the like.
It is used to display the telephone number input from 5 and the status of the device.

FIG. 6 is a diagram showing the state in which the portable radio telephone device of FIG. 5 is used. When not in use, the transmitter casing 13 and the receiver casing 11 are folded so as to overlap, as shown in FIG. In addition, when in use, as shown in FIG. 6(b), the transmitter housing 13 and the receiver housing 11 are opened at a required angle using the hinge portion 14, and the transmitter 12 is brought close to the user's mouth. The receiver 10 is placed against the ear.

Note that the sound output from the handset 10 may be changed depending on the noise in the surrounding environment, or may be set by the user by changing the volume etc. was fixed.

[Problems to be Solved by the Invention] When using a portable radio telephone device having this type of folding mechanism as shown in FIG. When the phone is strongly pressed against the ear, the force F applied to the receiver part is applied as an unreasonable force to the hinge part 14, and there is a risk that the hinge part etc. will be damaged.

Such damage is likely to occur when the user presses the handset 10 forcefully against the ear when the sound from the handset 10 is low.

SUMMARY OF THE INVENTION An object of the present invention is to provide a portable radio telephone device that prevents damage caused by such force applied to the handset.

[Means for Solving the Problems: The portable radio telephone device of the present invention includes a pressure detection unit that detects pressure applied to the receiver, and a pressure detection unit that controls audio output from the receiver in accordance with a detected value of the pressure detection unit. and control means.

For example, the control means is configured to include a control circuit that controls the gain of an amplifier that outputs audio from the handset based on the detected value from the pressure detection section, and is configured to increase the audio output when the pressure is large. .

[Function] According to the present invention, when the user strongly presses the handset against the ear, the detection value from the pressure detection section increases, and the audio output from the handset increases accordingly. This prevents excessive force from being applied to the handset by weakening the contact force of the person against the handset.

〔Example〕

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

FIG. 1 is a block diagram showing the electrical configuration of the present invention,
This figure shows an example in which the present invention is applied to a foldable portable radio telephone device as shown in FIG. A mobile phone circuit section 1, which includes a wireless circuit that transmits and receives radio waves and a control section that controls the wireless circuit, sends the received audio signal to the amplifier section 2. A signal sent from the mobile phone circuit section 1 is amplified by the amplifier section 2 and drives a speaker 3 as a receiver. The speaker 3 converts the audio electrical signal sent from the amplifier 2 into audio and outputs it.

On the other hand, the pressure detection section 4 is configured as a transducer that detects pressure and outputs the magnitude of the pressure as an electrical signal. As will be described later, this pressure detection section 4 may be of mechanical construction, a piezoelectric element such as a ceramic that generates a voltage when pressure is applied, or a pressure sensitive sheet using such a piezoelectric element. is used.

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

Note that the variable resistor 6 is a setting operation part for setting the initial value of the audio output. Further, the release switch 7 is a reset switch for stopping gain control based on pressure and returning it to the initial value. In this way, the sound output from the speaker 3 is changed from the initial value depending on the pressure detected by the pressure detection section 4.

FIG. 2 shows two typical relationships between the pressure applied to the pressure detection section and the audio output. These characteristics are
This can be realized by changing the control of the control section 5. The characteristic a is such that the initial value is maintained until a certain pressure is applied, and when a certain pressure is applied, the audio output increases in proportion to the pressure. Further, the characteristic b is such that the initial value is maintained below a certain pressure, and thereafter the audio output increases step by step. These characteristics are determined by considering the characteristics of the human ear.

Next, the structure of the pressure detection section will be explained.

FIG. 3 is an example of a mechanical pressure sensing configuration. In the receiver housing 11, a receiver pad 11A is provided on the front side of the receiver,
This receiver pad IIA is supported with respect to the receiver housing 11 by a compression spring 17. This handset pad'II
A working iron 18 is made to protrude inwardly, and a rack 19 is formed in a part of the working iron 18. Furthermore, a pinion 20 that meshes with the rack 19 is provided inside the receiver housing 11, and a rotating shaft of a variable resistor (not shown) is mounted on the pinion 20.

According to this configuration, the handset pad IIA is normally pushed upward in the figure by the compression spring 17.

When the user places the handset band 11A firmly against the ear, the handset pad 11A is pushed downward by pressure, and the actuating rod 18 is pushed downward. Therefore, the pinion 20 meshed with the rank 19 is rotated in the right direction in the figure, and the rotation shaft of the variable resistor is rotated by an angle corresponding to the rotation angle of the pinion 20, thereby changing the resistance value. When the pressure decreases, the rank 19 moves upward and the pinion 20 rotates to the left, changing the resistance value back.

In this way, the contact force applied to the receiver band IIA can be directly detected as a change in resistance value, and the gain of the amplifying section 2 may be changed based on this change in resistance value.

Further, as shown in the plan view and side view in FIGS. 4(a) and 4(b), a pressure-sensitive sheet 21 that generates an output by pressure is provided between the receiver band 11A and the receiver housing 11, and the receiver band IIA It can also be configured to detect the pressure applied to the sensor and output it as a voltage change.

Therefore, in the mobile radio telephone device configured in this way, when the user strongly presses the receiver against his ear because it is difficult to hear the sound from the receiver, the pressure detection section 4 detects this pressure, and the control section 5 controls the amplification section. 2, the audio output from the speaker 3, ie, the handset 10, increases. Therefore, the user can reduce the force applied to the handset 10, thereby reducing the force applied to the hinge part 14, and prevent damage to the hinge part 14.

If pressure is applied to the receiver, the sound level increases, so the user moves his/her ear away from the receiver. Then, the pressure applied to the handset part decreases, so that the audio output is reduced, and the user may repeat the action of pressing the handset part firmly against the ear again. For this reason, it is preferable that once pressure is detected in the pressure detection section, the audio output at the time when the pressure was detected is maintained for a certain period of time even if the pressure decreases. However, if the detected pressure has increased compared to the previous pressure, it is necessary to perform control to increase the audio output.

Note that, although the above embodiment shows an example in which the present invention is applied to a telephone device with a hinge structure, the present invention can also be applied to a telephone device that does not have a hinge structure. In other words, in mobile phone devices, the ambient noise changes as the user moves, and the received audio may also change. By doing so, it is possible to always obtain suitable audio output without adjusting the volume etc. each time, and the utility value of the telephone device can be increased.

[Effects of the Invention] As explained above, the present invention detects the pressure applied to the handset part and controls the audio output from the handset according to this detected value, so that the user does not have to put the handset firmly in his ear. When the phone is brought into contact with the handset, the audio output from the handset increases as the detection value of the pressure sensor increases, causing the user to weaken the contact force against the handset, causing excessive force to be applied to the hinge, etc. This has the effect of preventing damage to the device.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of an electrical system according to an embodiment of the present invention;
The figure is a characteristic diagram of detected pressure and audio output, Figure 3 is a sectional view showing an example of the mechanical configuration of the pressure detection section, and Figures 4 (a) and (
b) is a plan view and a side view showing a configuration example using a pressure sensitive element in the pressure detection section, FIG. 5 is a perspective view of a conventional foldable telephone device, and FIGS. 6(a) and (b) are respectively FIG. 3 is a side view showing the telephone device when folded and in use. DESCRIPTION OF SYMBOLS 1... Mobile phone circuit part, 2... Amplification part, 3... Speaker (receiver), 4... Pressure detection part, 5... Control part, 6... Variable resistor, 7...・Release switch, 10
...Telephone receiver, 11...Handset housing, IIA...Handset pad, 12...Telephone receiver, 13...Telephone housing, 14...Hinge section, 15...Numeric keypad , 16...
・Display part, 17... Compression spring, 18... Operating rod, 19... Rack, 20... Pinion, 21...
pressure sensitive sheet. Figure 1 Figure 2 Figure 11 Figure 3 Figure 4 Figure 10 Sanskrit candy number

Claims (1)

[Scope of Claims] 1. A pressure detection section that detects pressure applied to a receiver portion of a portable radio telephone device, and a control means that controls audio output from the receiver according to a detected value of the pressure detection section. A portable radio telephone device comprising: 2. The control means is a control circuit that controls the gain of the amplifier that outputs the voice of the receiver based on the detected value from the pressure detection section, and is controlled to increase the voice output when the detected pressure value is large. A portable radio telephone device according to claim 1.