JPH04132447A - Sound volume switching device for facsimile equipment - Google Patents

Abstract

PURPOSE:To eliminate the need for a slide switch, to reduce the cost and to make the size small by applying switching operation to a switching transistor(TR) based on a sound volume control signal and selecting a prescribed signal level from each divided signal level. CONSTITUTION:A control section 55 is provided with a sound volume storage means 55a storing prescribed sound volume information and a sound volume control means 55b outputting a sound volume control signal in response to the sound volume information based on a sound volume switching signal, and a signal level selection means 61a consists of a switching TR selecting a prescribed signal level based on the sound volume control signal. That is, the sound volume control means 55b reads sound voltage information stored in the sound volume storage means 55a based on the sound volume switching signal sent by the key operation on an operation panel, for example, and outputs a sound volume control signal in response to the sound volume information. A signal level selection means 61d based on the sound volume control signal selects a prescribed signal level by switching operation of the switching TR from plural divided signal levels. Thus, a slide switch for signal level changeover is not required and the device is made small.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a volume switching device for a facsimile machine that adjusts the volume of a key touch sound, a normal end sound, etc. in a facsimile machine.

(Prior Art) Conventionally, as a technology in this kind of field, there has been a technology as shown in FIG. 2, for example. The configuration will be explained below.

FIG. 2 is a block diagram showing a configuration example of a conventional volume switching device for a facsimile machine.

This volume switching device is comprised of a control section 3-Oa of a facsimile machine that controls transmission and reception operations of original images, and a volume switching section 10.

The volume switching unit 10 includes an audio generating unit 11 that generates an analog input signal AIN having a predetermined frequency under the control of a control unit 10a, and the audio generating unit 11 is connected to a resistor block 12 via a resistor 11a. There is. The resistor block 12 includes voltage dividing resistors 12a, 12b, and 12c connected in series between the resistor 11a and the ground GND. The output side of the resistance block 12 is connected to input terminals 13a, 13b, and 13c of the slide switch 13. The slide switch 13 is configured such that an operator slides a knob to switch contacts and select an output from the resistance block 12, and an output terminal 13d is connected to a speaker 15 via a speaker amplifier 14.

For example, the operation when setting the key touch sound to "loud" is as follows.

When the analog input signal AIN for key touch sound is generated under the control of the control unit 10a, the analog input signal A
The signal level of IN is divided into three by voltage dividing resistors 12a, 12b, and 12c, for example, so that the volume becomes high, medium, and low. The division result is the input terminal 1 of the slide switch 13.
3a, 13b.

13c, and the volume is set to "high" by the operator.
The signal level is selected. Thereafter, the selected signal level is amplified by the speaker amplifier 14, and the key touch sound with the volume set to "loud" is output from the speaker 15.

(Problems to be Solved by the Invention) However, in the volume switching device having the above configuration, a slide switch 13 having a mechanical mechanism for human operation is used to switch the signal level.

The slide switch 13 is mounted, for example, by opening a mounting hole in the side surface of the main body of the facsimile machine and allowing an operator to operate the slide switch 13 from the outside. The slide switch 13 that is mounted in this manner requires a large installation area, which is an important problem in facsimile machines that are becoming smaller. Furthermore, the slide switch 13
There was a problem in that the cost of installing it was high.

The present invention provides a volume switching device that solves the problems of the prior art, such as an increase in installation area and an increase in cost.

(Means for Solving the Problems) In order to solve the above problems, the present invention includes a control unit that controls transmission and reception operations of an original image, and an input signal of a predetermined frequency is generated based on the control of the control unit, a signal selection section that divides the input signal into a plurality of signal levels and then selects a predetermined signal level from each of the signal levels using a signal level selection means; and generates a volume according to the selection result of the signal selection section. In the volume switching device for a facsimile machine, the control section includes a volume storage means for storing predetermined volume information, and a volume for outputting a volume control signal according to the volume information based on the volume switching signal. In addition, the signal level selection means includes a switching transistor that selects the predetermined signal level based on the volume control signal.

(Function) Since the present invention has configured the volume switching device as described above,
The volume control means reads volume information stored in the volume storage means based on a volume switching signal issued by, for example, a key operation on the operation panel, and outputs a volume control signal according to the volume information. Based on the volume control signal, the signal level selection means selects a predetermined signal level from a plurality of divided signal levels by a switching operation of a switching transistor. Therefore, the above problem can be solved.

(Embodiment) FIG. 1 is a configuration block diagram of a volume switching device for a facsimile machine showing an embodiment of the present invention.

This facsimile apparatus includes a modem 51 that modulates transmission image data S1 and sends out a transmission signal D1, and demodulates transmission signal D2 to extract reception image data S2. An image processing section 52 is connected to the modem 51, and the image processing section 52 further includes a reading section 53 for reading an input document.
A recording unit 54 is also connected to record the received image on recording paper. Here, the image processing unit 52 performs one-dimensional or two-dimensional data compression encoding to reduce the amount of data output from the transmission reading unit 1, and also performs decoding to expand the received image data S2. This is the circuit that does this.

On the other hand, a control section 55 commonly connected to the modem 51, image processing section 52, reading section 53, and recording section 54 is connected to an operation panel 56 such as a keyboard for performing input operations, and a volume switching section 60 It is connected to the. Control unit 55
is composed of a CPU, etc., and includes a modem 51 and an image processing section 52.
, the reading section 53, the recording section 54, the operation panel 56, and the volume switching section 60, and is composed of a CPU. Furthermore, this control unit 55 can control, for example, “large” and “large”.
A volume storage unit 55a that stores volume information corresponding to medium and low volumes, and a volume control unit that outputs a volume control signal S4 corresponding to the volume information based on a volume switching signal S3 output from the operation panel 56. 55b, and is connected to the volume switching section 60 via the output port 55a. Here, the volume storage means 55a is formed of a part of storage area such as RAM (random access memory),
A user registers and uses predetermined volume information in advance.

Under the control of the control unit 55, the volume switching unit 60 switches the volume of the key touch sound, normal completion sound (sound emitted when the facsimile machine normally finishes transmitting and receiving the original image), etc. to a desired level. The signal selection unit 6 has a function of generating
1, an amplifier 62 and a speaker 63.

The signal selection section 61 includes an audio generation section 61a such as an integrated circuit that generates an analog input signal AIN of a predetermined frequency under the control of a control section, and voltage dividing resistors 61a-1, 61a-2, 61.
a-3 to divide the input signal AIN into a plurality of signal levels; and a signal level selection means 61d to select a predetermined signal level from among the divided signal levels based on the volume control signal S4. It is made up of. As shown in FIG. 3, the signal level selection means 61d includes bipolar transistors 61d-1 and 61d-2.
, 61d-3, each of which has a collector connected to a resistor block 61c, a base connected to an output port 55a, and an emitter connected to an amplifier 62 such as a speaker amplifier. The control section 55, the operation panel 56, and the volume switching section 60 constitute a volume switching device.

The volume switching device for the facsimile machine configured as described above operates as follows.

For example, when the transmission signal D2 containing the received image data S2 is received by the modem 51, the modem 51 demodulates the transmitted signal D2 and outputs the received image data S2. Thereafter, the received image data S2 is decoded by the image processing section 52 and sent to the recording section 54, where it is printed on recording paper as a received image.

When the printing of the received image is completed normally, the control section 55 detects the normal end state and outputs a control signal to the sound generation section 61a. Based on this control signal, the audio generator 61a:
An analog input signal AIN of a predetermined frequency is generated, and this analog input signal AIN is connected to a resistor of 61 cm1, 61 cm2.
．． The signal is divided at a ratio of 61 cm3, and the division result is input to the signal level selection means 61d. At this time, if the signal level selection means 61d is set to the volume "low", for example,
A signal level corresponding to "low" volume is selected. The selected signal level is amplified by the amplifier 62, and a normal end sound with a low volume is output from the speaker 63.

Here, if the volume switching key is pressed on the operation panel 56 and the volume is switched from "low" to "high", for example,
The volume switching signal S3 corresponding to the volume “high” is sent to the operation panel 5.
6 to the control unit 55. Then, the control unit 55 determines that the volume switching signal S3 is a signal corresponding to the volume "loud", and changes the volume to "loud" in the volume storage means 55a.
Reads the volume information corresponding to. The read volume information is input to the volume control means 55b, and the volume control means 55
b controls the output state of the output port 55a so that a volume control signal S4 corresponding to "loud" volume is output, and outputs the volume control signal S4 to the signal level selection means 61d. As a result, the signal level selection means 61d turns on the switching transistor for making conductive the signal level corresponding to the "loud" volume among the signal levels divided by the resistor block 61c. As a result, the volume "low" is switched to the volume "high", and the speaker 63 outputs a normal end sound with the volume "high".

This embodiment has the following advantages.

Since the control unit 55 and operation panel 56 already provided in the facsimile machine are used, the signal level selection means 6
By just configuring 1d with a switching transistor, the volume can be easily switched.

As a result, as in the conventional case, the signal level selection means 61d
By configuring the facsimile machine with a slide switch, the space problem can be solved, and the facsimile machine can be made smaller.

Note that the present invention is not limited to the illustrated embodiment, and various modifications are possible. For example, there are the following variations.

(1) Connect the resistor block 61c to the voltage dividing resistor 61a-1゜61
a-2, 61a-3, analog input signal AIN
is divided into three parts, but it is not limited to the collector. n (positive integer) stages of voltage dividing resistors are connected in series, and the analog input signal AIN
It may be divided into tn. This allows for more precise volume switching.

(ff>If the divided signal level is sufficiently amplified to operate the speaker 63, the amplifier 62
does not need to be provided.

(III) Although the signal level selection means 61d is made up of bipolar transistors, it may be made up of, for example, an MO3 type transistor.

(Effects of the Invention) As described above in detail, according to the present invention, the control unit of the facsimile device includes a volume storage means for storing predetermined volume information, and a volume storage means for storing predetermined volume information based on a volume switching signal. A volume control means for outputting a volume control signal is provided, and a switching transistor is operated based on the volume control signal to select a predetermined signal level from each divided signal level. You can easily change the volume by operating the installed operation panel. As a result, the conventionally used slide switch can be removed, and the cost and size of the facsimile machine can be reduced accordingly.

[Brief explanation of drawings]

FIG. 1 is a configuration block diagram of a volume switching device for a facsimile machine showing an embodiment of the present invention, FIG. 2 is a conventional volume switching device for a facsimile machine, and FIG. 3 is a circuit of the signal level selection means in FIG. 1. It is a diagram. 55...control unit, 55a...volume storage means, 55b...volume control means, 56...
...Operation panel, 61...Signal selection section, 61d
...Signal level selection means, 63...Speaker, AIN...Song analog input signal, S3...
...Volume switching signal, S4...Volume control signal.

Claims (1)

[Scope of Claims] A control unit that controls transmission and reception operations of the original image; and a control unit that generates an input signal of a predetermined frequency based on the control of the control unit, divides the input signal into a plurality of signal levels, and then divides the input signal into a plurality of signal levels. A volume switching device for a facsimile machine, comprising: a signal selection unit that selects a predetermined signal level from the respective signal levels using a selection unit; and a speaker that generates a volume according to the selection result of the signal selection unit, The control section is provided with a volume storage means for storing predetermined volume information, and a volume control means for outputting a volume control signal according to the volume information based on a volume switching signal, and the signal level selection means includes the following: A volume switching device for a facsimile machine, comprising a switching transistor that selects the predetermined signal level based on a volume control signal.