KR950004181Y1 - Subtraction disorder detecting circuit of amount of money for vending machine - Google Patents

Abstract

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Description

Defective detection circuit for reducing input amount of vending machine

1 is a detailed circuit diagram of the present invention.

2 is a timing diagram according to the present invention.

3 is a flow chart according to the present invention.

* Explanation of symbols for main parts of the drawings

1: microcomputer 2: coin mechanism

3: price setting unit 4: display unit

5: solenoid drive unit

The present invention relates to a vending machine. In particular, the vending machine detects when a defect that is not subtracted despite the discharge of the selected product occurs and prepares measures to prevent the disadvantage of the vending machine owner. It relates to a circuit for detecting a defective amount of reduced input of.

In a conventional vending machine, when a coin is inserted and a product selection button is pressed, a sales start signal and a price return signal are sent to the coin mechanism (COIN MECHANISM) on the control circuit for the amount reduction and the change calculation. In particular, there has been a problem that the consumer can continue to discharge the product because the start signal is not applied to the coin mechanism due to the malfunction of the relay, thereby preventing the input amount from being reduced.

The object of the present invention is to solve the above problems, and detect whether there is a change in the price signal generated when the product selection button is pressed after inserting a coin into the vending machine, and whether the sales start signal has arrived as a coin mechanism. If it is judged that the start signal has not arrived at the coin mechanism, it can display the deduction of money loss to the outside and disregard all key inputs and turn off the lamp during sale to prevent the disadvantage of the owner of the vending machine. The present invention provides a circuit for detecting a defective amount of input loss of a vending machine.

Hereinafter, the present invention will be described based on the accompanying drawings.

FIG. 1 shows a detailed circuit diagram of the present invention. The six already set price signals outputted to the terminals \ 1 to \ 6 of the ordinary coin mechanism 2 are diodes D _{a1 to} D _a6 (D _b1 ). -D _b6 ), a microcomputer ( ₁ ) connected to the light emitting diodes of the resistors (R _a1 to R _a6 ) and the photocouplers (P _{1 to} P ₆ ), respectively, and to which the program of the device is incorporated through the price setting section (3). ) input terminal (PA ₁ is connected to ~PA _6), the control line of the output terminal (PB ₁ ~PB ₆₎ of the microcomputer (1) is led to price setting unit (3), the pricing section 3 of at is set the selling price for the product signal of 16 outputted from the output terminal (PB ₁ ~PB _16).

The diodes D _{c1 to} D _c6 and the phototriacs T ₁ to between the terminals \ ₁ to \ ₆ of the coin mechanism 2 and the output terminals PC _{1 to} PC _{6 of the} microcomputer ₁ . T ₆ ) and resistors R _c1 to R _c6 are connected to each other and output to the terminals P _{c1 to} P _c6 of the microcomputer 1 so that the coin mechanism 2 recognizes the price of the selected product.

In addition, the output terminal PD of the microcomputer 1 inputs the AC output terminal AC of the coin mechanism 2 and the start signal through the resistor R ₁ , the transistor Q, and the relay RY ₁₇ . The both ends of the switch part of the relay RY ₁₇ are connected to the terminal IN, and the coin mechanism 2 recognizes the sales start signal through the output of the terminal PD and reduces the amount of money according to the coin 9 and the selected product. The change is calculated.

In addition, the output terminal PE of the microcomputer 1 is connected to a display unit 4 composed of lamps, sales lamps, and fault indication lamps corresponding to each column. Fault output lamp turns on by outputting signal through), and lamp turns off during sales.

Further, the output terminal (PE) and an output terminal (PG ₁ ~PG ₄₎ has a signal output to the solenoid and the driver 5 is connected to an output terminal (PG ₁ ~PG ₄₎ of the microcomputer (1) is a relay driving The relays RY _{1 to} RY ₁₆ are conducted through the inverters 7 and 8 via the driver 6 and the solenoids S _{1 to} S ₁₆ corresponding to each column are driven.

Thus, the solenoid (S ₁ ~S ₁₆₎ as it is driven by driving the output terminal (PF) of a certain control signal, and outputs a buffer (BF) absorb surge relay (RY ₉₎ for through a solenoid ₍₁ S to prevent the deterioration and failure of the relay (RY ₁ ~RY ₁₆₎ by whether on or off the surge ~S ₁₆₎ the relay (RY ₁ ~RY ₁₆₎ for the surge absorption line to make only the passage of the switching current without The relay RY ₀ is controlled so that both on and off surges of the solenoids S _{1 to} S ₁₆ are concentrated on the surge absorption relay RY ₀ .

Unexplained symbols R _b1 to R _b5 are resistors, Vcc is a DC power supply, and COM is an AC common terminal.

The operation and effects of the present invention constructed as described above will be described with reference to FIGS. 2 and 3.

When power is supplied to the vending machine and enters the standby state, the standby state is a state in which the coin 9 is not input to the coin mechanism 2. Then, when the user inserts a coin, the coin mechanism 2 outputs a signal through the terminals (\ ₁ to \ ₆ ) corresponding to the price signal less than the input amount, and the output AC signal is a corresponding diode ( Signals are applied to the light emitting diodes of D _{a1 to} D _a6 , the resistors R _a1 to R _a5 , the diodes D _{b1 to} D _b6 , and the photocouplers P _{1 to} P ₆ to provide photocouplers P _{1 to} P _6. ) Is turned on. At the same time, a constant pulse signal is applied to the corresponding input terminals PA _{1 to} PA ₆ of the microcomputer ₁ . For example, the output of the price terminal (\ _1- \ ₆ ) of the coin mechanism 2 is \ ₁ = 100 won, \ ₂ = 200 won, \ ₃ = 300 won, \ ₄ = 4OO won, \ ₅ = 500 won, \ ₆ = 600 won, and if the coin 9 entered by the user is 400 won, only the terminals PA _1- PA ₄ of the input terminals PA _1- PA ₆ of the microcomputer ₁ The constant pulse signal is input and the high signal state is input to the remaining terminals PA ₅ and PA ₆ . In such a state, when the user selects a product of a desired column and turns on a push switch (not shown), a low signal is output from a terminal corresponding to the selected product among the output terminals PB _{1 to} PB ₁₆ , and thus the Since the price is applied to the price setting unit 3 which sets the price, a low signal is input to the selected terminal among the input terminals PA _{1 to} PA ₆ , and the microcomputer 1 recognizes the price signal for the selected column. Will be. For example, if the selected product was 300 won, only the input terminal PA3 of the microcomputer 1 would go low. At the same time as the push switch is turned on, the microcomputer 1 not only outputs the selected product through the solenoid drive unit 5 but also outputs the price signal of the selected column to the output terminals PC _{1 to} PC ₆ of the coin mechanism 2. Coin mechanism 2 recognizes the price of the selected commodity by outputting it to the terminals (\ ₁ ~ \ ₂ ). When the process is performed, the output signal of the terminals (PC ₁ ~ PC ₆ ) is applied to the corresponding resistance ( R _c1 ~R _c6) photo triac (T ₁ through ₆ ~T) it is turned on to apply the signal through a diode (D _c1 ~D _c6) to the terminal (\ ₁ ~ \ _6).

In addition, the signal is output to the output terminal PD at the same time as the price carrier signal of the output terminals PC _{1 to} PC ₆ to turn on the transistor Q through the resistor R ₁ and at the same time the relay RY _17. ) Is energized to apply an AC signal to the start signal input terminal (IN) of the coin mechanism (2) to reduce the amount of money and change the balance according to the set product.

At this time, the microcomputer ₁ checks whether there is a change in the price signal inputted to the input terminals PA _{1 to} PA _6. The reason for this is that the coin starting signal is outputted through the output terminals PC _{1 to} PC ₆ . This is because the initial price signal is subtracted as a result of the output to the input terminals PA _{1 to} PA ₆ .

In other words, the output terminal (PC ₁ ~PC _6), the sales start signal has been output clearly, again the subtracted value signal terminals without a defect or malfunction in a circuit performing a subtraction value in the coin mechanism (2) through (\ ₁ ~ \ ₆ ), the signal is input to the input terminals PA _{1 to} PA _{6 of the} microcomputer ₁ at least a predetermined subtracted value, not the initial price. (2-1) of FIG. 2 shows a rough change in the price signal. The coincidence time point at which the predetermined price signal is input to the input terminals PA _{1 to} PA ₆ and the push switch is turned on at the time of coin input t ₁ ( At t ₂ ), a start signal such as (2-2) is output and at the same time, a fixed price signal to the input terminals PA _{1 to} PA ₆ is subtracted as shown in (2-1). Therefore, the microcomputer 1 checks the presence or absence of a price signal between the times t _{2 to} t ₄ to determine the amount of money reduction of the coin mechanism 2 according to the start signal. Therefore, if the change in the price signal is the result of subtraction of the decision signal 100 of FIG. 3, the subtracting operation of the input amount is normal. If there is no change of the price signal as shown in (2-4) of FIG. Likewise, when the state of no sales start signal is detected as shown in (2-5), the microcomputer 1 outputs a signal controlled by the display unit 4 so that the subtractive failure indication lamp is turned on and the lamp in sale is turned off. It will turn off to inform the sale stop and ignore the key input not shown.

(2-3) in FIG. 2 is a drive timing diagram of the solenoid.

In this way, by detecting the change in the price signal at the same time as the push switch of the present invention, it is clearly checked whether the start signal is sent to the coin mechanism to prevent the problem caused by the poor production of the input amount. There is an advantage that can prevent the disadvantage.

Claims (1)

In a conventional can vending machine composed of a coin mechanism (2), a price setting section (3), a display section (4), a solenoid driving section (5), and the like, when the select button is turned on after the coin is put into the coin mechanism (2), the micro By detecting subtracted changes in the price signal inputted to the input terminals PA _{1 to} PA ₆ of the computer 1 and detecting a phenomenon in which the start signal does not arrive at the coin mechanism 2 due to a defective circuit or malfunction. Determination of the input amount reduction failure detection circuit of the vending machine, characterized in that by judging that the input amount of money is bad subtraction, the fault indicator lights through the display unit 4 and cut off all key input.