JP2926163B2 - Vending machine push button circuit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an automatic vending machine in which a purchaser inserts a voucher such as a bill, money or card, and presses a push button switch for a desired article to purchase the article. More particularly, the present invention relates to a push button circuit of a vending machine which collects information on the open / close state of a push button switch and controls the information.

〔Overview〕

According to the present invention, in a push button circuit of a vending machine in which a purchaser can purchase a desired article by pressing a push button switch, unit information including information on the open / close state of the push button switch is included in a circuit unit including the push button switch. By providing an element circuit of a shift register for storing, sequentially connecting a large number of circuit units in a swaying manner, and reading and controlling unit information set in the element circuit as a shift register connected in series, This simplifies the mounting wiring for the circuit unit and enables the device to be enlarged.

[Conventional technology]

FIG. 3 is a block diagram showing an example of a push button circuit of a conventional vending machine.

This conventional push button circuit is a push button switch.
A large number n including a display element 12 for indicating that the article can be output and a display element 13 for indicating that the article is sold out.
And a control circuit 20a.The output of the control circuit 20a is input to the input / output control circuit 40, and under the control of the input / output control circuit 40, the article is released from the automatic vending product delivery device 50. It is configured as follows.

Here, the push button switch 1 in the circuit unit 10a
1 and one ends of the display elements 12 and 13 are connected to the control circuit 20a via terminals, respectively, and the display control is performed on the display elements 12 and 13 in the control circuit 20a depending on whether one end of each is grounded or not. .

[Problems to be solved by the invention]

As described above, in the conventional push button circuit of a vending machine, the control line between the circuit unit 10a and the control circuit 20a is connected to the control circuit 20a for each circuit unit 10a. Becomes large, the amount of wiring becomes enormous. For example, in the case of the conventional example shown in FIG.
Since three control lines are required for each circuit unit, if the number of circuit units is 100, the number of control lines becomes 300 and the amount of wiring becomes enormous, making it very difficult to realize such a vending machine. There is a disadvantage.

By the way, in the goods sales industry in recent years,
Due to the shortage of human resources and the efficiency of management, the types of goods sold in vending machines and the quantity that can be prepared will be large, and the number of circuit units including push button switches will be about 100.
In order to further improve the service, the types of display information such as output availability and sold out also increase, and the number of control lines required per circuit unit tends to increase.

The object of the present invention is to eliminate the disadvantages mentioned above,
It is an object of the present invention to provide a push button circuit of a vending machine which can easily perform wiring of control lines even if the number of circuit units increases, and which can realize a large-scale vending machine.

[Means for solving the problem]

The present invention relates to a plurality of circuit units including a switch operated by pressing a push button and arranged for each of a plurality of push buttons, and a control circuit electrically connected to the circuit unit and collecting information on an open / close state of the switch. In the push button circuit of a vending machine provided with the above, the circuit unit has an input terminal and an output terminal respectively, and the output terminals and the input terminals of at least a number of the circuit units are sequentially changed at least for data signals. Each circuit unit includes an element circuit of a shift register whose input is connected to the input terminal and whose output is connected to the output terminal, and a circuit that sets information of the switch in the element circuit, The control circuit includes a series connection of a number of circuit units connected in series. Characterized in that the information set in the element circuit comprising a reading circuit means as Torejisuta.

In addition, the present invention provides the above-mentioned many unit circuits,
The output terminals and the input terminals can all be connected by wires in a stab manner.

Also, in the present invention, the element circuit has three bits, and the circuit unit extracts and displays information for sale display displayed for each set push button for two of the three bits. May be provided.

Further, according to the present invention, the circuit means includes a multi-bit shift register in the control circuit, and the shift register can be connected in series with the shift register connected in series.

Further, in the present invention, the control circuit may include, in addition to the circuit means, means for setting the information for sale display in a predetermined stage of the multi-bit shift register.

[Action]

For example, a 3-bit shift register is used as an element circuit of the circuit unit, and a 3n-bit shift register is used as circuit means. Means for setting switch information in a first stage of the 3-bit shift register by a circuit for setting switch information, and for setting information for sale display in the second and third stages are the 3n units. The information for sale display is set by writing the information in a predetermined stage of the bit shift register. Then, the information of the set switch is read out to a predetermined stage of the 3n-bit shift register, and is taken out in parallel to control the release of the article. On the other hand, the information set for sale display is
The information of the display for sale is taken out by the means for controlling the display, and the display control is performed according to the information taken out.

Therefore, it is only necessary to connect the necessary control lines sequentially to the circuit units in any manner, and it is not necessary to wire the control circuits for each circuit unit as in the related art. For example, a data line connecting each element circuit is used. And a clock signal line for supplying a clock signal to each element circuit, a latch signal line for instructing each element circuit to latch information, a power supply source, and a ground line. Just get better. This eliminates the restriction that the amount of control lines becomes enormous, and makes it possible to easily realize a large-scale vending machine.

Note that, depending on the configuration of the vending machine, it is not always necessary to connect all of the output terminals and input terminals of the circuit unit in a sequential manner, and it is sufficient to connect at least the data signals in a sequential manner.

〔Example〕

FIG. 1 is a block diagram showing an embodiment of the present invention.

The present embodiment is an automatic system including a large number n of circuit units 10 including a push button switch 11, a display element 12 for displaying that the article can be output, and a display element 13 for indicating that the article is sold out. In a push button circuit of a vending machine, a circuit unit 10 characterized by the present invention includes an input terminal 16 and an output terminal 17 respectively, and n circuit units 10 are output terminals of a preceding stage.
A 17-bit shift register as an element circuit in which the input terminal 16 is connected to the input terminal 16 and the output terminal 17 is connected to the output terminal 17 is connected to the input terminal 16 of the next stage by an electric wire in such a manner that the input terminal 16 and the input terminal 16 of the next stage are sequentially connected. And the switch information of the push button switch 11 is set in the first stage of the shift register 14, and the display of the display elements 12 and 13 is controlled based on the display information set in the second and third stages. Setting control means 15 to be performed.

Further, a shift register 21 of 3n bits as circuit means for reading information set in the shift register 14 as n shift registers 14 connected in series according to a serial connection, and each stage of the shift register 21 A control circuit 20 including a read / write circuit 22 for reading or writing the contents of a clock signal, a clock signal generating circuit 31 for supplying a clock signal to the shift registers 14 and 21, and a latch signal for supplying a latch signal to the setting control means 15. Generator circuit 32
In accordance with the contents of the shift register 21 output from the control circuit 20, control is performed to release a predetermined article from the automatic vending product delivery device 50 via the input / output control circuit 40, and the shift register 21 A processor 30 for writing predetermined display information in each predetermined stage and controlling the clock signal generation circuit 31 and the latch signal generation circuit 32 is provided.

The circuit unit 10 includes a push button switch 11 and display elements 12 and 13 as shown in FIG.
Flip-flops (F / F) 14a, 14b and 14c as 3-bit shift register 14, flip-flops (F / F) 15a and 15b as setting control means 15, and three-state bus buffer 18a And 18b and a resistor 19a.

The input of the flip-flop 14a is the circuit unit 1.
0 is connected to input terminal 16 and the output is flip-flop 14b
The output of the flip-flop 14b is connected to the input of the flip-flop 14c.
The output of 4c is connected to the output terminal 17 of the circuit unit 10, and each clock terminal is connected to the clock signal line,
A 3-bit shift register 14 is constructed. The S (set) and R (reset) terminals of the flip-flops 14a, 14b and 14c are grounded via resistors 19d and 19e, respectively.

One end of the push button switch 11 is connected to the power supply VDD,
The other end is connected to the inputs of the bus buffers 18a and 18b and is grounded via the resistor 19a. The outputs of the bus buffers 18a and 18b are respectively connected to the flip-flop 14
a is connected to the S terminal and the R terminal, and the control terminal is connected to the latch signal line. The display element 12 is powered by the anode
The cathode is connected to the output of the flip-flop 15a via a resistor 19b, and the input of the flip-flop 15a is connected to the output of the flip-flop 14b. Similarly, the anode of the display element 13 is connected to the power supply VDD, the cathode is connected to the output of the flip-flop 15b via the resistor 19c, and the input of the flip-flop 15b is connected to the output of the flip-flop 14c. Then, the clock terminals of the flip-flops 15a and 15b are respectively connected to the latch signal lines.

As is apparent from the above configuration, the wiring required in the present embodiment is such that the data lines, the clock signal lines, the latch signal lines, the power supply lines, and the ground lines are formed by sequentially connecting each circuit unit to five electric wires. It only needs to be cascaded and can be easily performed irrespective of the number of circuit units.

 Next, the operation of the present embodiment will be described.

First, the operation of the circuit unit 10 will be described. “1” or “0” is set to the flip-flops 14 b and 14 c by the data input from the control circuit 20. For example, when output is possible, "1" is set in the flip-flop 14b,
If it is not sold out, "0" is stored in the flip-flop 14c.
Is set. When the latch signal is set to the “H” level, the flip-flop 15a operates and the display element 12 is turned on, and the display element 13 is not turned on. This indicates to the purchaser that pressing the push button switch 11 allows the purchase of the desired article.

Next, when the purchaser presses the push button switch 11,
A current flows through the resistor 19a, and “1” is set in the flip-flop 14a via the bus buffer 18a due to a voltage drop by the resistor 19a. Then, when the push button switch 11 returns to the original position and opens, the flip-flop 14a is reset to "0" via the bus buffer 18b.

When the purchaser inserts money into the vending machine, for example, the processor 30 assigns “1” to the element register of the shift register 21 corresponding to the flip-flop 14b of the circuit unit 10 for the item that can be purchased with the inserted amount. At the same time, "1" is written to the element register of the shift register 21 corresponding to the flip-flop 14c of the circuit unit 10 for the already sold-out article, and "0" is written otherwise. Thus, the read / write circuit 22 is controlled to control the generation of the clock signal and the latch signal from the clock signal generation circuit 31 and the latch signal generation circuit 32.

The read / write circuit 22 writes “1” or “0” into the element register at a predetermined stage of the shift register 21 under the control of the processor 30. The data written in the shift register 21 is transferred to each shift register 14 every 200 ms, for example, using a clock signal having a repetition frequency of 5 cycles, and output enable information and flip-flops 14b and 14c of a predetermined shift register 14 are output. Set up sold out information.

Then, when the purchaser presses the push button switch 11, the control circuit 20 reads "1" set in the flip-flop 14a of the circuit unit 10 by this to the element register of the corresponding stage of the shift register 21, and This is fetched by the read / write circuit 22, and is read by the processor 30.
Output to The processor 30 controls the vending machine to release the article specified by the purchaser via the input / output control circuit 40.

As described above, the purchaser can obtain the desired article.

The case where a 3-bit shift register is used as an element circuit has been described above. However, when only switch information of a push button is used, a 1-bit register is used and a circuit related to display information is omitted. Further, when the information of the unit circuit to be controlled is increased, a shift register having a bit number corresponding to the number of information may be used.

〔The invention's effect〕

As described above, according to the present invention, a push-button circuit can be configured simply by cascading each circuit unit in a sequence based on a required formula, and a large-scale push button circuit can be easily formed regardless of the number of circuit units. Vending machine can be realized, and the effect is great.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention. FIG. 2 is a circuit diagram showing an example of the circuit unit. FIG. 3 is a block diagram showing a conventional example. 10, 10a ... circuit unit, 11 ... push button switch, 12, 13 ... display element, 14, 21 ... shift register,
14a, 14b, 14c, 15a, 15b ... Flip-flop (F /
F), 15: Setting control means, 16: Input terminal, 17: Output terminal, 18a, 18b: Bus buffer, 19a to 19e: Resistance, 20, 20a: Control circuit, 22: Read / write Circuit, 3
0: Processor, 31: Clock signal generation circuit, 32:
... Latch signal generation circuit, 40 ... Input / output control circuit, 50 ...
Vending machine, VDD ... Power supply.

Claims (5)

(57) [Claims] 1. A plurality of circuit units including a switch operated by pressing a push button and arranged for each of a plurality of push buttons, and a control electrically connected to the circuit unit to collect information on the open / closed state of the switch. In a push button circuit of a vending machine having a circuit, the circuit unit includes an input terminal and an output terminal, and the output terminal and the input terminal of at least one of the plurality of circuit units are sequentially changed at least for a data signal. Each circuit unit includes an element circuit of a shift register having an input connected to the input terminal and an output connected to the output terminal, and a circuit for setting information of the switch in the element circuit. In the control circuit, a number of circuit units connected in series are connected in series. Pushbutton circuit of the vending machine, characterized in that the information set as a shift register to said element circuit comprising a reading circuit means has. 2. The push-button circuit of a vending machine according to claim 1, wherein the output terminals and the input terminals of all of the plurality of unit circuits are sequentially connected by electric wires in a manner dependent on each other. 3. The element circuit has three bits, and the circuit unit extracts and displays information for sale displayed on each of the set push buttons for two of the three bits. 2. A push button circuit for a vending machine according to claim 1, further comprising means for controlling. 4. The push button of a vending machine according to claim 1, wherein said circuit means includes a multi-bit shift register in a control circuit, and said shift register is connected in series with said serially connected shift register. circuit. 5. The push button of a vending machine according to claim 4, wherein said control circuit includes means for setting said information for sale display in a predetermined stage of said multi-bit shift register in addition to said circuit means. circuit.