JPS6230153Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial field of application> The present invention relates to a sound reproduction device configured to play a number of songs according to the number of coins inserted. This allows paid playback (use) even when connected and used.

<Prior art> Some sound reproduction devices such as so-called karaoke devices are based on paid reproduction (use) when playing or using music (for example, the
21697), but when using this type of conventional device by connecting some external input device to it,
It was not configured to be able to count coin credits.

<Problems to be solved by the invention> Therefore, conventionally, when an external input device is connected to a sound reproduction device, it has been either disabled or allowed to be used free of charge; It was very inconvenient and could not be used.

<Means for solving the problem> The technical means of the present invention for solving this technical problem is to detect the output signal e of the external input device 3 and cause the counter circuit 6 to count the output signal e. A signal detection device 8 is provided for outputting a pulse signal f similar to the pulse signal c to the counter circuit 6.

<Function> When using the external input device 3 connected to the external input terminal of the main body 1, when the main body 1 inputs an output signal e higher than the reference voltage from the external input device 3 for a certain period of time or more, the delay timing circuit 12 is the detection signal g
Since the output pulse width setting circuit 15 outputs the pulse signal f to the counter circuit 6 each time, the counter circuit 6 continues counting by subtraction in the same way as when the pulse signal f is input. You can play as many songs as you like.

<Embodiment> The present invention will be explained below according to the illustrated embodiment. In FIG.
3 is the speaker, and 3 is an external input device connected to the external input terminal of the main body 1. The main body 1 includes a coin passage detection element 4, a coin input circuit 5, a counter circuit 6, and a coin number display circuit 7, as shown in FIG. The coin passage detection element 4 detects the inserted coin and outputs a detection signal a. The coin input circuit 5 inputs the detection signal a and outputs the counter circuit 6.
Outputs the reset signal b. The counter circuit 6 performs an addition count each time the set signal b is input, and also performs a subtraction count by inputting the pulse signal c each time the main body 1 plays a song, and outputs a count signal d to the coin number display circuit 7. Further, when the counter circuit 6 counts up due to subtraction, it outputs a stop signal i to stop the operation of the main body 1. The coin number display circuit 7 inputs the count signal d and displays the number of coins that are not used for reproducing the music.

8 is a signal detection device that detects the output signal e of the external input device 3 and outputs a pulse signal f similar to the pulse signal c to the counter circuit 6, and this signal detection device 8 is an integrated circuit for detecting between songs. Or it is realized by a discrete configuration, and in order to prevent malfunctions due to noise etc., it outputs the pulse signal f after determining that the output signal e such as a music signal is input from the external input device 3 for a certain period of time or more. is configured to do so. That is, as shown in FIG. 2, the signal detection device 8 compares the magnitude of the voltage between the output signal e inputted through the amplifier circuit 9 and the reference voltage _V0 , and determines whether the voltage of the output signal e is large. A comparison circuit 10 outputs an output signal e when , and stops the output when it is small, and the pulse width of the output signal e input from the comparison circuit 10 is larger than the width of a certain time T set by the delay circuit 11. A delay timing circuit 12 that outputs a detection signal g when , and a comparison circuit 10
A detection signal g is inputted through a noise removal circuit 13 that removes noise from the output signal e between the output signal e and the delay timing circuit 12, and a waveform shaping circuit 14, and a predetermined pulse width is set to cause the counter circuit 6 to count down. The delay timing circuit 12 includes an output pulse width setting circuit 15 which outputs a pulse signal f having a delay timing circuit 12, and a reset circuit 16 which receives the pulse signal f and outputs a reset signal h which resets the delay timing circuit 12.

In the embodiment described above, the counter circuit 6 performs subtraction counting each time one song is played, but instead of this, two or three or more songs may be subtracted and counted each time two or more songs are played. 6 may be configured to count the playback of songs by addition.

<Effects of the invention> According to the invention, since the output signal of the external input device connected to the external input terminal is detected and the output signal is counted by the counter circuit, the external input device is connected to the external input terminal. Even when connected, it is possible to play the number of songs according to the coins inserted, and therefore, what previously was only paid playback using the music source of the sound playback device itself, it is also possible to realize paid playback using an external input device. Therefore, it is possible to immediately respond to the diversification of music source media in the future, which is extremely convenient. Furthermore, conventional counter circuits and other functions can be used as is.
Its practical effects are significant, such as the fact that it has a simple structure and can be provided at low cost.

[Brief description of the drawings]

FIG. 1 is an overall block diagram showing one embodiment of the present invention, and FIG. 2 is a block diagram of a portion of the signal detection device. DESCRIPTION OF SYMBOLS 1... Sound reproduction device body, 3... External input device, 6... Counter circuit, 8... Signal detection device, 10... Comparison circuit, 12... Delay timing circuit.

Claims (1)

[Scope of Claim for Utility Model Registration] A counter circuit 6 is set by inserting a coin, and the counter circuit 6 counts the pulse signal c every time a song is played, so that the number of songs corresponding to the number of coins inserted can be played. Sound reproduction device body 1
In the sound reproducing device, an external input device 3 is connected to an external input terminal of the sound reproducing device main body 1, and the sound reproducing device main body 1 is operated by an output signal e of the external input device 3, wherein the external input A signal detection device 8 is provided which detects the output signal e of the device 3 and outputs a pulse signal f similar to the pulse signal c to the counter circuit 6 so that the output signal e is counted by the counter circuit 6. A distinctive sound reproduction device.