GB2143062A - Dual control electronics switch apparatus with photoelectric identification and digital code arrangement - Google Patents

Abstract

If an inserted card, photoelectrically-sensed at 10, has the correct coding, and a code entered manually at 20 is correct, then via amplification at 301, a circuit 50 is actuated to e.g. open a door. Incorrect coding, via amplification at 302, actuates an alarm circuit 40. <IMAGE>

Description

SPECIFICATION Dual control electronics switch apparatus with photoelectric identification and digital code arrangement This invention relates to an electronics switch apparatus, and more particularly to a switch apparatus with dual control arrangement in photoelectric identification and digital code for opening and closing the control mechanisms with complete safety assurance.

Conventionally, all atuomatic and electrical openand-close switch apparatuses are built on the basis of a single control arrangement, ranging from the simplest configuration to the most complicated structure such as the monitoring system used in the bank. However, the simple structure of the openand-close switch apparatus offers little guaranty in safe keeping the control mechanisms while the complicated structure of the open-and-close switch apparatus has to be coupled with the computer system for performing the normal functions, and they are inapplicable to the ordinary open-and-close control mechanisms such as safe, electric door, lift door, vehicle switch, machine bench, etc., so that, the known open-and-close switch apparatus has achieved little utility effect.

It is accordingly a primary object of this invention to provide a dual control electronics switch apparatus with photoelectric identification and digital code arrangements for assuring double safety functions without requiring computer processing operations.

It is another object of this invention to provide a dual control electronics switch apparatus with a simple structure and easy operation so as to reduce the manufacturing cost and promote the utility value of the switch apparatus.

These and other objects of the invention are achieved by providing a dual control electronics switch apparatus with photoelectric identification and digital code arrangements, which apparatus comprises in combination; a photoelectric identifying circuit for receiving the identification signals and providing a response output; and digital code circuit connected to the photoelectric identifying circuit for receiving the coded signals and selecting the required logic operations in keeping with the photoelectric identifying circuit; an amplifying circuit coupled between the photoelectric identifying circuit and the digital code circuit for amplifying the signals received thereform; an alarming circuit connected to the amplifying circuit and the digital code circuit for performing alarming functions upon receiving the abnormal logic signals from the digital code circuit; and an open-close control circuit coupled with the photoelectric identifying circuit and the amplifying circuit for accomplishing the open and close operations of the control mechanisms associated with this apparatus upon receiving the normal logic signals from the associated circuits.

Further characteristics and advantages of the present invention will become more apparent from the following detailed descriptions of one example of a preferred but not sole embodiment for the invention, given below with reference to the accompanying drawings, in which: Figure 1 is a block diagram of a preferred embodiment of a dual control electronics switch apparatus according to this invention; Figure2 is a circuit diagram of the preferred embodiment shown in Figure 1; and Figure 3 is a schematic illustration indicating a photoelectric identifying card matched with an ordinary switch seat in performing open and close functions according to the preferred embodiment shown in Figures 1 and 2.

Referring to Figure 1, there is shown a preferred embodiment of a dual control electronics switch apparatus according to this invention, which apparatus comprises incombination: a photoelectric identifying circuit 10 for receiving the identification signals generated from an identifying card and for outputting the identified signals therefrom; a digital code circuit 20 electrically connected to the photoelectric identifying circuit 10 for receiving the coded signals from the user and outputting the normal or abnormal logic signals associated with the photoelectric identifying circuit 10; an amplifying circuit 30 coupled with both the photoelectric identifying circuit 10 and the digital code circuit 20 for receiving and amplifying the signals output from the associated circuits; an alarming circuit 40 respectively connected to the digital circuit 20 and the amplifying circuit 30 for receiving the abnormal signals from the digital code circuit 20 and providing the warning thereat; and an open-close control circuit 50 coupled with the photoelectric identifying circuit 10 and the digital code circuit 20 through the amplifying circuit 30 for receiving the correct logic signals thereof and effecting the open and close operations. For detailed circuit connections. please refer to Figure 2.

As shown in Figure 2, the amplifying circuit 30 includes two parts--the first amplifying part 301 and the second amplifying part 302. The first amplifying part 301 comprises an NPN transistor Q1, a first electromagnetic relay X1 with a plurality of normally open contacts "a", a reverse-biased diode D1 and other elements. The emitter of the transistor Q1 is grounded, the collector connected to the power source Vcc through the parallel-connected reversebiased diode D1, and the electromagnetic relay X1 whose normally open contact X1 -a, which is served as an OFF switch thereto, is grounded thereat. The second amplifying part 302 mainly includes an NPN transistor Q2, a second electromagnetic relay X2 with a plurality of normally open contacts "a" and a normally closed contact "b" and a reversebiased diode D2.The emitter of the transistor Q2 is also grounded while the collector coupled with the power source Vcc through the reversed-biased diode D2.

The electromagnetic relay X2 is connected between the power source Vcc and the collector of the transistor Q2.

The photoelectric identifying circuit 10 is mainly combined by a plurality of light emitting diodes D3, D4, D5, D5 and photosensitive resistors A, B, C, D, E.

The anode of the first light emitting diode D5 is connected to the power source Vcc through a resistor R5 while the cathode grounded thereat. The first photosensitive resistor A is connected to the base of the transistor Q1 at one end and grounded at the other for receiving the light emitted from the first diode D5. The second light emitting diode D5 and the second photosensitive resistor B are connected in parallel with the first light emitting diode D5 and the first photosensitive resistor A through a resistor Rs.

The anode of the third light emitting diode D4 is connected to the power source Vcc through a resistor R4 and the cathode grounded thereat. The third photosensitive resistor C is coupled in series with the base of the transistor Q1 in the first amplifying part 301 and located with respect to the third light emitting diode D4for receiving the light thereof. The fourth light emitting diode D3 is arranged in parallel connection with the third light emitting diode D4 while the fourth photosensitive resistor D in series connection with the third photosensitive resistor C with the location adjacent to the fourth light emitting diode D3for receiving the light thereof.The fifth light emitting diode D7 is connected to the second amplifying part 302 with the anode linked up to the power source Vcc through a resistor R7 and the cathode grounded thereat, together with the fifth photosensitive resistor E being connected to the base of the transistor Q2 and located thereat for receiving the light emitted from the fifth light emitting diode D7.

The digital code circuit 20 is mainly combined by a plurality of coded switches, which are arranged in the digital sequence from 1 through 9. The coded switches 1 and 2 are connected in series and coupled with the photoelectric identifying circuit 10 by connecting one end of the switch 1 to the fourth photosensitive resistor D and the other end of switch 2 to the power source Vcc through a resistor R1, a zener diode ZD1 and the normally closed relay contact X2-b connected in series thereto.The remaining switches 3 through 9 are arranged in parallel connection with one end thereof coupled to the normally closed relay contact X2-b through a resistor R2 and a zener diode ZD2, and the other end connected to the fifth photosensitive resistor E of the second amplifying part 302 through a normally open relay contact X2-4a and a timedelay relay contact TR-a connected in parallel thereto. Besides, the circuit of the coded switches 1 and 2 is also connected in parallel with the circuit of the coded switches 3 through 9.

The alarming circuit 40 includes a plurality of normally open relay contacts X-ia, X2-2a, X23a, of the electromagnetic relay X2 in the second amplifying part 302 and respectively coupled with a plurality of alarming devices including a timedelay relay TR, a buzzer BZ with a warning light coupled thereto, and a camera P arranged as shown in Figure 2 for performing alarming functions thereat.

The open-close control circuit 50 mainly includes a plurality of the normally open relay contacts X1~1a, and X1--2ar and X1~3a of the first electromagnetic relay1 to be separately coupled with the related control mechanisms such as electric door, safe door, vehicle switch, etc., for performing the open and close operations.

Operations of the preferred embodiment of this invention are as follows: Referring to Figures 2 and 3, when the user intends to open the control mechanism equiped with this embodiment, just inserts a photoelectric identifying card 70 (as shown in Figure 3) into the control slot 61 in the switch seat 60 ordinarily provided for the control mechanism, the third and fourth photosensitive resistors C and D in the photoelectric identifying circuit 10 will continue to be in a lowresistancestate by receiving the light from the third and fourth LED's D3 and D4 through the coded apertures arranged in the card 70, but the other photosensitive resistors A, B, and E are all isolated from the light sources thereof, and become in a high-resistance condition without conduction thereat.Meanwhile, by pressing down the switches 1 and 2 (the preset code for the embodiment), the photoelectric identifying circuit 10 and the first amplifying part 301, together with the digital code circuit 20, are actuated to conduct, and current from the power source Vcc flows to the transistor Q1 through the normally closed relay contact X2-b, the zener diode ZD1, the resistor R1 and the coded switches 1 and 2, in the digital code circuit 20 as well as the fourth and third photosensitive resistors D and C to the base of the transistor Q1, which is therefore caused to conduct thereat.As a result, the electromagnetic relay X1 is energized to change any one of its normally open contacts X1~1a, and X1~2a, Xi-3a to closed condition so as to drive the associated control mechanisms such as safe door or electric door to open in accomplishing the open function. At this stage, the electromagnetic relay X1 will remain at energized condition along with the open of the control mechanisms until the OFF switch (as shown in Figure 2) is operated for returning the switch apparatus to the closed state along with the control mechanisms.Meanwhile, when the photoelectric identifying circuit 10 and the first amplifying part 301 are actuated to conduct, owing to the fact that the fifth photosensitive resistor E coupled with the second amplifying part 302 is still kept in a high-resistance state, no current will flow therefrom, so that the second amplifying part 302 remains inactive thereat, and also the alarming circuit 40 continues in a cut-off state without generating the alarming signals thereat.

If the intruder who has no photoelectric identifying card just presses down the coded switches on the switch seat 60, because all the photosensitive resistors A through E are in low-resistance state and the circuit thereof is kept in conduction, any coded switch (1 through 9) pressed down by the intruder will cause the current to flow from the power source Vcc to the transistor Q2 in the second amplifying part 302 and energize the second electromagnetic relay X2 thereof to change from the normally open-contact "a" to close-contact "b", resulting in actuating the alarming circuit 40 to perform the functions of warning, photographing and/or other alarming functions thereat. Simultaneously, owing to the open of the normally closed relay contact X2-b of the second electromagnetic relay X2, the digital code circuit 20 is left in a cut-off state with respect to the first amplifying part 301. With the first and second photosensitive resistors A and B remaining at a low-resistance condition thereat, the open-close control circuit 50 will not be actuated to open the control mechanism, and the intruder cannot succeed in his intruding purpose.

If the intruder uses an incorrect photoelectric identifying card or just takes an opaque card to insert it into the control slot 61, owing to the cut-off of the third and fourth photosensitive resistors C and D in the photoelectric identifying circuit 10, the openclose control circuit 50 will not be actuated thereat, and the intruder will never achieve anything.

It shall be appreciated that, according to the preferred embodiment of this invention, the photosensitive resistors A through E are all kept in a low-resistance state along with the closed condition of the control mechanism. The conductive and non-conductive selections for the photosensitive resistors arranged in the embodiment are determined by the formation of the photoelectric identifying card 70 (shown in Figure 3b). The identifying card 70 is made of opaque material with a plurality of code apertures arranged in conjunction with the preset locations of the light emitting diodes D3 through D7 matched with the photosensitive resistors A through E.As an example, in the preferred embodiment, the identifying card 70 has the code apertures C and D formed in conformity with the locations of the third and fourth photosensitive resistors C and D for providing the light thereto; while, the remaining codes A, B and E are formed in light-shielding condition for keeping the corresponding photosensitive resistors A, B and E apart from light. Therefore, when the identifying card 70 is inserted into the control slot 61, the third and fourth photosensitive resistors C and D in the photoelectric identifying circuit 10 (as shown in Figure 2) will continue to receive light and remain at a lowresistance state to conduct therefrom; whereas, the remaining photosensitive resistors A, B and E are till isolated from light and kept in a high-resistance state without conduction. Besides, the arrangement of the code apertures in the identifying card 70 are made in such a way that they are difficult to be seen through by the third party. On the other hand, the digital code switches in the switch seat 60 can also be set in advance by connecting any two selected buttons (1 through 9) in the switch seat 60 to the code switches 1 and 2 in the digital code circuit 20 (in this preferred embodiment, the selected digital buttons in the switch set 60 are 1 and 2) so as to assure a complete safety property for this embodiment.

While the invention has been particularly shown and described with reference to a preferred embodi mentthereof, it shall be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (9)

1. A dual control electronics switch apparatus characterized in the combination of: a photoelectric identifying means for receiving identification signals and generating a response output; a digital code means connected to said photoelectric identifying means for receiving coded signals and seiecting the required logic signals in keeping with said photoelectric identifying means; an amplifying means coupled with said photoelectric identifying means and said digital code means for amplifying the signals received therefrom; an alarming means connected to said digital code means and said amplifying means for performing alarming functions upon receiving abnormal logic signals from said digital code means; and an open-close control means coupled with said photoelectric identifying means and said amplifying means for effectin open and close operations in conjunction with the normal logic signals from said amplifying means; thereby, open and close operations are accomplished with complete safety assurance.

2. A dual control electronics switch apparatus according to Claim 1 wherein said photoelectric identifying means is characterized by: a plurality of light emitting elements connected in parallel to the power source for providing light at distributed locations and arranged in numeral sequence from first through fifth; and a plurality of photosensitive resistance elements correspondingly arranged for respectively receiving the light of said light emitting elements, so that, by manipulating the off and on of said light emitting elements, the conduction and non-conduction of said photosensitive resistance elements can be controlled in a coded pattern.

3. A dual control electronics switch apparatus according to Claim 1 wherein said digital code means is characterized in that a plurality of switching circuits are connected in parallel for being adaptable to digital switches and electrically coupled with said photoelectric identifying means, and that, among said switching circuits, at least two are selected as the correct coded switches for being connected in series to the fourth element of said photosensitive resistance elements for generating normal logic signals when said correct coded switches are sequentially operated as well as for generating abnormal logic signals when said switching circuits are incorrectly operated thereat.

4. A dual control electronics switch apparatus according to Claim 1 wherein said amplifying means is characterized in that: a first amplifying part is coupled with said coded switches through the first to the fourth elements of said photoelectric identifying means for effecting open function in conjunction with the normal logic operation of said digital code means; and a second amplifying part is coupled with the rest of said switching circuits through the fifth element of said photoelectric identifying means for effecting alarming function in conjunction with the abnormal logic operation of said digital code means.

5. A dual control electronics switch apparatus according to claim 4 wherein said first amplifying part is characterized by: a first transistor with its base connected to the first photosensitive resistance element of said photoelectric identifying means, the collector to the power source thereof, and the emitter grounded thereat; a first reverse-biased diode with its cathode connected to the power source and the anode to the collector of said transistor; and a first electromagnetic relay device, which includes a plurality of normally open contacts, connected to the power source at one end and to the collector of said first transistor at the other where the collector of said first transistor is also grounded through a normally open contact of said first electromagnetic relay device for effecting open operations.

6. A dual control electronics switch apparatus according to Claim 4 wherein said second amplifying part is characterized by: a second transistor with its base connected to the fifth photosensitive resistance element of said photoelectric identifying means, and the emitter grounded thereat; a second reverse-biased diode with its cathode connected to the power source and the anode to the collector of said transistor; and a second electromagnetic relay device with a normally closed contact and a plurality of normally open contacts connected to the power source at one end and to the collector of said second transistor at another for effecting alarming operations.

7. A dual control electronics switch apparatus according to Claim 1 wherein said alarming means is characterized in that a plurality of alarming devices are respectively coupled with the normally open contacts of said second electromagnetic relay device for performing alarming functions in conjunction with the abnormal logic signals of said digital code means through said second amplifying part.

8. A dual control electronics switch apparatus according to Claim 1 wherein said open-close control means is characterized in that a plurality of the normally open relay contacts of said first electromagnetic relay device are separately coupled with the related control mechanisms for performing the open and close operations in conjunction with the normal logic signals of said digital code means through said first amplifying part.

9. A dual control electronics switch apparatus substantially as hereinbefore described with reference to the accompanying drawings.