KR20160149046A

KR20160149046A - Protection against solenoid failure of the coin counter

Info

Publication number: KR20160149046A
Application number: KR1020150086023A
Authority: KR
Inventors: 이장석; 안의상
Original assignee: (주)에이텍티앤
Priority date: 2015-06-17
Filing date: 2015-06-17
Publication date: 2016-12-27

Abstract

The present invention relates to an apparatus for protecting against malfunction of a solenoid of a coin counting apparatus, which prevents damage to a main board (circuit board) interlocked therewith even if a solenoid is broken due to overheating due to a malfunction of the solenoid due to continuous operation or abnormal condition, A solenoid opening the hopper for release of the coin; And a main board for controlling the operation of the solenoid. The main board operates the solenoid for a preset time only to prevent the malfunction of the solenoid from occurring, and when the predetermined time elapses, And an erroneous operation discriminating unit for discriminating an erroneous operation from the result of the logical operation of the signal outputted from the delay unit and the trigger signal inputted to the delay unit is implemented as a protection device, thereby preventing erroneous operation of the solenoid, This prevents the main board from being damaged even if an instantaneous overcurrent occurs.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a protection counter for solenoid malfunction of a coin counter,

The present invention relates to a protection device against malfunction of a solenoid of a coin operated counter, and in particular, even if a solenoid is broken due to overheat during a malfunction of the solenoid due to continuous operation or abnormal condition, the main board (circuit board) To prevent a malfunction of the solenoid of a coin operated counter.

Although the settlement of charges by magnetic or IC cards is gradually increasing in each field of everyday life, there are still many cases where the bills and coins are counted and settled. In particular, promptness and accuracy are required when counting coins smaller in size than bills.

When a coin is counted, a typical coin counter counts the number of coins inserted. When the coin count is completed, the coin counter performs an additional coin counting operation by rotating the disk for a predetermined period of time (for example, about 3.5 seconds) At the same time, the non-coin-operated chute is driven to discharge defective coins and foreign substances contained in the hopper.

Here, the solenoid is used to discharge the defective coin of the hopper. In order to drive the solenoid, a control signal is generated from a control device (composed of FET, TR, etc.) of the main board (circuit board) linked to the solenoid.

When the solenoid keeps its on state constantly due to its characteristics (ie, ON or OFF operation), or when an abnormal state occurs, the solenoid is burned if the self-heating increases and exceeds the limit, There is a case where elements of the main board are burned, and furthermore, the main board itself is burned.

Since the solenoid is a single unit, it is easy to maintain and easy to maintain by replacing the parts, but there is no great cost in terms of cost. However, since the main board needs to be replaced entirely, maintenance is complicated and costly There are disadvantages. In particular, when the main board is damaged, the reliability of the product is lowered.

Conventionally proposed techniques for a coin coder are disclosed in Patent Documents 1 and 2 below.

In the conventional art disclosed in Patent Document 1, in a device for sorting and counting a large amount of coins to be charged, a coin supply unit discharges a large amount of coins to be charged into the main body housing, one by one; Conveying means for conveying the coin by an elastic force at an outlet of the coin supplying portion; A feed path formed on an upper surface of the main body housing to be connected to a discharge portion of the coin supplying portion; Sensing means provided on the transport path for sensing and counting; A normal coin receiving portion and a defective coin receiving hole provided on the conveying path and separating and sorting the defective coin and the normal coin accurately in a short time.

In addition, in the conventional technique disclosed in Patent Document 2, a coin is interposed by a coin stopper which is inclined upwards, a holding bowl surrounding the lower outer periphery of the rotating disk and holding the coin, and a coin stopper extending radially on the upper surface of the rotating disk. And coins are received by the coin winding means around the rotating disk. The coin hopper is configured to elastically bias the coin above the center of the rotating disk as an upstream of the coin winding means, A dropping means for avoiding the collision of the two wheels is provided. As a result, the coin to be pushed is forcibly moved relative to the coin by the dropping means, so coins having different diameters are reliably discharged.

Korean Patent No. 0780052 (Published on November 21, 2007) Korean Patent No. 0971407 (Published Dec. 3, 2008)

However, the above-described conventional technique uses a solenoid for discharging defective coin, and when the solenoid is heated and burned due to continuous operation or abnormal operation, damage to the main board, which may occur in association with the solenoid, can not be prevented .

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a main board (circuit board) interlocked with a solenoid in case of breakage of solenoid due to overheat during a malfunction of the solenoid due to continuous operation or abnormal condition And it is an object of the present invention to provide a device for preventing malfunction of a solenoid of a coin operated counter so as to prevent damage.

According to an aspect of the present invention, there is provided a safeguard apparatus for a solenoid malfunction of a coin operated water meter, including: a solenoid for opening a hopper for discharging a defective coin; And a main board for controlling the operation of the solenoid,

The main board includes a delay unit for operating the solenoid for a preset time only and for forcibly terminating the operation of the solenoid after a predetermined time in order to prevent the malfunction of the solenoid from occurring.

The main board may further include a malfunction determining unit for logically calculating a signal output from the delay unit and a trigger signal input to the delay unit, and determining a malfunction by the logical operation.

The delay unit may include a delay unit that delays the input trigger signal according to the time constant.

The malfunction determining unit may include an inverter for inverting a phase of an input trigger signal; And a logical multiplication element for logically multiplying the output signal of the inverter and the signal output from the delay unit and outputting the result as a malfunction determination signal.

Further, the apparatus for protecting the solenoid from malfunction of the coin operated meter according to the present invention may further comprise a fuse which is interposed between the solenoid and the main board so as to be disconnected when an instantaneous overcurrent flows due to overheating of the solenoid, .

In addition, the apparatus for protecting the solenoid from malfunction of the coin operated meter according to the present invention may further include a display unit for displaying a malfunction discrimination signal outputted from the malfunction discrimination unit of the main board.

According to the present invention, even if the solenoid is broken due to overheat due to a malfunction of the solenoid due to continuous operation or abnormal condition, it prevents the overcurrent from flowing into the main board (circuit board) interlocked therewith, There is an advantage to be able to do.

In addition, according to the present invention, when the solenoid operates for a predetermined time or more using the time-out concept, the solenoid is forcibly terminated and the solenoid is prevented from malfunctioning.

In addition, according to the present invention, it is possible to detect whether the sensor for malfunctioning is malfunctioning through the malfunction determining unit, and to display the malfunction by the display unit when the malfunction is detected, thereby enabling the administrator to easily determine whether the sensor is malfunctioning .

Brief Description of Drawings Fig. 1 is a schematic block diagram of a protection device against a solenoid malfunction of a coin operated counter according to a preferred embodiment of the present invention; Fig.
FIG. 2 is a circuit diagram of an embodiment of the delay portion and the malfunction determining portion of FIG. 1;
FIG. 3 is a graph of a delay value according to the time constant of FIG. 1,
Fig. 4 is a truth table of the malfunction determining part of Fig. 2,
5 is an operation timing diagram of the malfunction determining section of FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a protective device for a solenoid malfunction of a coin operated water meter according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a protection device against a malfunction of a solenoid of a coin operated water meter according to a preferred embodiment of the present invention.

The apparatus for protecting a solenoid from malfunction of a coin operated meter according to the present invention includes a solenoid 20, a main board 10, a fuse 30, and a display unit 40.

The solenoid 20 serves to open the hopper for discharging the defective coin in the presence of defective coin in the hopper. Here, a typical coin collecting counter is provided with an upper hopper for accommodating a normal coin and a lower hopper for temporarily accommodating a coin (or foreign matter) charged into a charging port and accommodating defective coins or foreign matter. A solenoid is used to open and close each hopper, and the solenoid in the present invention means a solenoid used for temporarily accommodating the input coin and opening the lower hopper for receiving defective coins or foreign matter.

The main board 10 controls the operation of the solenoid 20.

The main board 10 includes circuit components 11 provided with various electric elements such as FETs and TRs, a solenoid 20 for operating the solenoid 20 for a predetermined time period to prevent malfunction of the solenoid 20, A delay unit 12 for forcibly stopping the operation of the solenoid 20 after a predetermined time has elapsed, a delay unit 12 for delaying a signal output from the delay unit 12 and a trigger signal input to the delay unit 12 And a malfunction determining section (13) for performing a logical operation and determining a malfunction by the resultant value.

Here, as shown in FIG. 2, the delay unit 12 includes a delay unit 12a for delaying an input trigger signal according to a time constant R * C.

The malfunction determining unit 13 includes an inverter 13a for inverting the phase of the input trigger signal T; And an AND gate 13b for ANDing the output signal B of the inverter 13a and the signal A output from the delay unit 12 and outputting the result as a malfunction determination signal.

The fuse 30 is interposed between the solenoid 20 and the main board 10 so as to protect the main board 10 from an overcurrent when the solenoid 20 overheats, .

The display unit 40 displays a malfunction discrimination signal output from the malfunction determining unit 13 of the main board 10. The display unit 40 may be realized by a liquid crystal display (LCD) or by an alarm device that transmits an alarm.

The operation of the protection device against solenoid malfunction of the coin operated counter according to the preferred embodiment of the present invention will be described in detail with reference to FIGS. 1 to 5.

First, when a coin is inserted into the input port of the coin counting device, the input port detection sensor installed at a predetermined position of the input port detects the coin and transmits the detection result to the control device. At this time, the coin put in the inlet is received in the lower hopper through the coin inflow path.

When the coin is sensed through the slot sensor, the control unit drives the disc driving unit to drive the disc. Coins contained in the lower hopper are sorted by the rotation of the disc, and are individually transported to the upper hopper and counted. When the coin received in the lower hopper is conveyed to the upper hopper by the rotation of the disk, the coin sensor installed in the lower part of the disk or the channel of the coin transfer path detects the coin and transmits the coin detection result to the control device. When the coin is detected by the input port sensor and the duct sensor, the control unit continues to carry and count the coins while maintaining the driving of the disk through the disk driving unit.

Meanwhile, when the coin transfer and the counting are performed in the above-described process, when the coin or the foreign substance is detected, the discharging operation is performed. Here, in order to discharge the defective coin, the lower hopper is opened by using the solenoid 20 and the non-coin chute is driven (discharging operation) to discharge the defective coin or foreign matter remaining in the lower hopper.

In this case, when the solenoid continuously operates (such as ON / OFF) or an abnormal state occurs and the ON state is continuously maintained, the self-heating of the solenoid 20 rises and an instantaneous overcurrent occurs. The momentary overcurrent causes the solenoid 20 to break or the instantaneous overcurrent to flow into the main board 10 and damage the main board 10.

Therefore, in order to solve all the problems caused by the instantaneous overcurrent caused by overheating of the solenoid, the fuse 30 is provided between the solenoid 20 and the main board 10 in the present invention. When the instantaneous overcurrent occurs due to the overheat of the solenoid through the provided fuse 30, the fuse 30 is disconnected to cut off the power supply line. This prevents breakage of the solenoid 20 and at the same time prevents instantaneous overcurrent from flowing into the main board 10, thereby preventing damage to the main board 10 even when an instantaneous overcurrent occurs due to overheating of the solenoid.

As another feature of the present invention, it is possible to prevent malfunction of the solenoid due to unspecified external factors. One of the causes of the unspecified external factor is the malfunction of the sensor for solenoid operation.

5 for the solenoid drive is input to the main board 10, the delay unit 12 uses the delay unit 12a to generate a time constant (time constant) set by the resistor and the capacitor And holds the trigger signal T by the number (R * C) (A). Here, the delay time t of the trigger signal T may vary through the change of the resistance R value. It is desirable to set the delay time t to an optimal value through an experiment or the like. FIG. 3 illustrates the delay time according to the change of the resistance value R. FIG.

The delay time (tsec) = 1.1 x R x C can be set. For example, when R = 90KR and C = 100㎌, t = 1.1x (4 占⁶ ) 占 (1 占^10-6 ) = 4.4sec. This delay time becomes the solenoid operation period. After the delay time has elapsed, the solenoid operation is automatically terminated to prevent a malfunction, and a malfunction prevention operation will be described in detail later.

The waveform A in Fig. 5 is an example of the delayed signal waveform.

The delay signal A delayed by the trigger signal is transmitted to the malfunction determining section 13. The erroneous operation determining unit 13 inverts the phase of the trigger signal T input to the main board 10 as shown by the waveform B in FIG. 5 and outputs the phase inverted signal B and the delayed signal A, To the logical multiplication element 13b, and outputs the result as a malfunction determination signal.

Here, the truth table of the logical multiplication element 13b is as shown in Fig. For example, when the trigger signal T is 0, the delay signal A is 0, and the phase inversion signal B is 0, the logic operation result signal becomes 0. In this case, it is determined that an error has occurred in the sensor for driving the solenoid. If the trigger signal T is 0, the delay signal A is 1, and the phase inversion signal B is 1, the logic operation result signal becomes 1. [ In this case, it is determined that the solenoid is driven normally. If the trigger signal T is 1, the delay signal A is 0, and the phase inversion signal B is 0, the logic operation result signal becomes 0. In this case, the discrimination is suspended. When the trigger signal T is 1, the delay signal A is 1, and the phase inversion signal B is 0, the logical operation result signal becomes 0. In this case, the judgment is also suspended.

When it is determined that an error has occurred in the sensor for driving the solenoid, the error discrimination signal is displayed through the display unit 40. Through such an error discrimination signal, the user recognizes that there is a sensor error or an abnormal operation state. If sensor error occurs, replace the sensor.

When the operation state determined by the malfunction determining section 13 is determined as a malfunction state, the signal is fed back to the control device provided in the circuit component 11, and the control device forcibly stops the operation of the solenoid Thereby preventing malfunction. This forced solenoid termination method is a time-out concept in which operation is terminated automatically after operating for a predetermined period of time.

As described above, according to the present invention, solenoid operation is forcibly terminated after a predetermined operation time through the time-out concept, thereby preventing a solenoid malfunction due to an unspecified external element. In addition, when the solenoid overheats due to overheating, the overcurrent is prevented from flowing into the main board through the fuse, thereby preventing the main board from being damaged.

Although the present invention has been described in detail with reference to the above embodiments, it is needless to say that the present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the spirit of the present invention.

The present invention is applied to a technique for preventing a malfunction of a solenoid due to an unspecified external element in a coin operated counter and preventing a main board from being damaged by an instantaneous overcurrent generated due to overheating of the solenoid.

10: Motherboard
12:
13:
20: Solenoid
30: Fuse
40:

Claims

A solenoid for opening the hopper for release of the defective coin; And a main board for controlling the operation of the solenoid,
Wherein the main board includes a delay unit for operating the solenoid for a preset time only and for forcibly terminating the operation of the solenoid after a predetermined time in order to prevent a malfunction of the solenoid from occurring, Protective device against malfunction of solenoid.

The main board of claim 1, further comprising a malfunction determination unit for logically calculating a signal output from the delay unit and a trigger signal input to the delay unit, and determining a malfunction by a result of the logic operation, .

The apparatus according to claim 1, wherein the delay unit includes a delay unit that delays an input trigger signal according to a time constant set by a resistor and a capacitor.

The malfunction determining unit may include: an inverter for inverting a phase of an input trigger signal; And a logical product multiplying the output signal of the inverter by a signal output from the delay unit and outputting the result as a malfunction determination signal.

The solenoid according to claim 1, further comprising a fuse interposed between the solenoid and the main board, the fuse being disconnected when an instantaneous overcurrent flows due to overheating of the solenoid to protect the main board from an overcurrent. Protection against.

The apparatus according to claim 1, further comprising a display unit for displaying a malfunction discrimination signal output from the malfunction discrimination unit of the main board.