JPH04114218U - volume adjustment device - Google Patents

Abstract

(57) [Summary] [Purpose] The present invention relates to a motor drive type volume adjustment device operated by remote control, and enables fine adjustment using a special motor drive method. [Structure] A motor 3 to which a movable terminal of a volume adjustment volume 4 is connected to a rotating shaft, a receiving circuit 1 that receives a remote control signal for increasing and decreasing the volume, and an up/down output signal of this receiving circuit. This is a volume adjustment device having a motor drive circuit 2 that receives a signal and rotates the motor in the forward or reverse direction. The motor drive circuit is characterized in that the output power of the motor drive circuit is varied.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a volume control device for an audio amplifier, and in particular to a remote control signal control device. This invention relates to a volume adjustment device that adjusts the volume by driving a motor using a motor.

0002

[Conventional technology]

One way to adjust the volume using a remote control is to use a motor to control the volume terminal. How to configure it to work and operate this motor with a remote control signal to adjust the volume. There is a law. There is an up and down button on the transmitter of the remote control, press the up button The motor rotates in the direction that increases the volume while the down button is pressed. rotates in the opposite direction and the volume decreases. When the button is released, the motor stops and the volume is set. be done.

0003

[Problem that the idea aims to solve]

The motor has inertia, and if the braking is poor, the motor will go a little too far even if you release the button pressure. cormorant. Now, when there is a movable volume terminal at a in Figure 3, increase the volume slightly. Even if you use the remote control to press the up button momentarily, it will not work due to inertia. I'll go all the way. Even if I try to decrease it again, it returns to a. Like this a? The movable terminal must have a jumping distance of movement from b to b (hereinafter referred to as the minimum movement distance). Therefore, there is a problem in that fine adjustment between the minimum moving distances is difficult. Book The purpose of the invention was to solve these problems and create a volume adjustment device that could be finely adjusted. do.

0004

[Means to solve the problem]

The present invention includes a motor in which a movable terminal for a volume adjustment volume is connected to a rotating shaft; A receiving circuit that receives remote control signals for increasing and decreasing the volume, and this receiving circuit. A motor drive that rotates the motor forward or reverse by receiving up/down output signals from the circuit. A volume adjustment device with a live circuit that rotates the motor in the normal direction to increase the volume. The motor supplied to the motor is The output power of the drive circuit is different.

[0005]

[Effect]

As mentioned above, since the power for forward and reverse rotation of the motor is different, the movable end when the volume is increased is There is a difference between the minimum movement distance of the child and the minimum movement distance of the movable terminal when the volume is turned down. did Therefore, by repeating up and down alternately, the stopping position of the movable terminal will be different. Since the difference will be shifted by a distance of , if the difference is small, fine adjustment of the volume will be possible.

[0006]

【Example】

Next, the present invention will be explained with reference to the drawings. FIG. 1 is a block diagram of an embodiment of the present invention.

[0007] In FIG. 1, a receiving circuit 1 receives a remote control signal and receives an up or down signal. Output. Motor drive circuit 2 receives up/down signals and drives motor 3. Supply electricity. The movable terminal of the volume 4 is connected to the rotating shaft of the motor 3. is also connected to output terminal 6, and receives the audio signal input to terminal 5 and whose volume is adjusted. Output from output terminal 6.

[0008] Remote control signal sent by pressing the up or down button on the remote control transmitter When the receiver circuit 1 receives the signal, the receiver circuit 1 transmits the up or down signal to the motor drive. Output to live circuit 2. If the remote control signal is an up signal, the receiving circuit 2 also outputs an up signal to the motor drive circuit 2, and the motor drive circuit 2 outputs an up signal to the motor drive circuit 2. Power is supplied to the motor 3 so that current flows from the child U through the windings of the motor 3 to the terminal d. supply. The motor 3 rotates in the forward direction and controls the movable end of the volume 4 to increase the volume. When the remote control signal stops being transmitted when the remote control is moved, the movable terminal also stops and the volume increases. is set. When the down remote control signal is sent, motor drive circuit 2 Conversely, the current flows from terminal d to terminal u through the winding of motor 3. Supply electricity. Motor 3 rotates in the opposite direction to reduce volume 4. When the movable terminal of the remote controller is moved and the transmission of the remote control signal stops, the movable terminal also stops and the volume decreases. is decreased and set.

[0009] The area inside the one-dot chain line is an example of the motor drive circuit 2. The signal is input to one terminal 11 of the flip-flop 13, and the down signal is input to the other terminal 11. The signal is input to terminal 12 of . The Qu output of the flip-flop 13 is connected to the terminal via the resistor R. Qd output is connected to terminal d. A diode D is connected to the resistor R. are connected in parallel with the polarities shown.

0010 When the remote control signal is up, the up signal is input to terminal 11 and the Qu output is turned on. from the Qu output, through the resistor R, to the terminal u, the winding of the motor 3, and the direction of the terminal d. A current flows. Conversely, if the remote control signal is down, a down signal is sent to terminal 12. input, the Qu output turns on, and the Qd output connects terminal d, the winding of motor 3, and terminal u. Current flows through diode D in the direction of . Therefore, when the up signal Since the current flows through the resistor R, the current supplied to the motor 3 is lower than when the down signal is generated. The force becomes smaller.

[0011] Now, there is a movable terminal at a in Figure 2, and you can use it to raise the remote control to slightly increase the volume. When the push button is pressed momentarily, the movable terminal stops at the minimum travel distance b. Ru. Next, when the movable terminal is moved by the minimum movement distance with the down signal, the down signal Since the power supplied to the motor 3 is greater when the signal is up than when the signal is up, The minimum moving distance is larger than that for up, and the movable terminal passes beyond a and stops at c. Next When an up signal is supplied to b, the minimum movement distance of up causes the volume to decrease from b. Stop at d. By repeating the transmission of up and down signals alternately in this way, it becomes movable. The stopping position of the terminal moves like e, f, g, h,... The movable terminal can be stopped at positions d, f, h, etc. between a and b with a short movement distance. I can do that.

0012 Note that varying the power supplied to the motor 3 is not limited to the embodiment shown in FIG. For example, instead of using a pulsed current, the duty ratio is different for up and down. You may let them. In addition, the power supplied to the motor is large both when it is up and when it is down. However, it is better to reduce the power consumption during power-up. this This is because when increasing the volume, sudden changes in volume are psychologically unfavorable.

[0013]

[Effect of the idea]

As described above, the power supplied to the motor is different when the volume is increased and when the volume is decreased. Therefore, there is a difference in the minimum movement distance when raising and lowering, and the By repeating this alternately, the stopping position of the volume movable terminal moves. This has the effect of allowing fine adjustment of the volume.

[Brief explanation of drawings]

FIG. 1 is an embodiment of a volume adjustment device according to the present invention.

FIG. 2 is an explanatory diagram of the operation of the embodiment.

FIG. 3 is an explanatory diagram of the operation of a conventional example.

[Explanation of symbols]

1 Receiving circuit 2 Motor drive circuit 3 motor 4 Volume 5 Audio signal input terminal 6 Audio signal output terminal 11 Up signal input terminal 12 Down signal input terminal 13 flip flop D diode R resistance

Claims (2)

[Scope of utility model registration request] 1. A motor in which a movable terminal for a volume adjustment volume is connected to a rotating shaft, a receiving circuit that receives a remote control signal, and a motor that receives up and down output signals of the receiving circuit and rotates the motor in forward and reverse directions. 1. A volume adjustment device having a drive circuit, characterized in that the output power of the motor drive circuit is made different when increasing the volume and when decreasing the volume. 2. The volume adjusting device according to claim 1, wherein the power used to increase the volume is lower than the power used to decrease the volume.