CN2084083U

CN2084083U - Photoelectric lock

Info

Publication number: CN2084083U
Application number: CN 91212329
Authority: CN
Inventors: 康平
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-03-13
Filing date: 1991-03-13
Publication date: 1991-09-04

Abstract

The utility model discloses a photoelectric lock, which relates to a photoelectric lock for electronic instruments and equipment switches, which is composed of a photoelectric detection circuit (1), a marble circuit (2), a comparator circuit (3), an execution circuit (4), a key, and a micro switch; the key is inserted into the photoelectric detection circuit which obtains a signal, and then the signal is input into the comparison circuit; simultaneously, the marble circuit also inputs a signal to the comparison circuit; the comparison circuit compares the two signals, and when the two signals are the same, the comparison circuit inputs an unlocking signal to the executive circuit; simultaneously, the execution circuit is turned on to be connected with a power supply source; the storage devices of the marble circuit is at least one set, and when the number of the storage devices is multiple sets, the security degree can be improved. The utility model has the advantages of simple structure and convenient operation; the utility model can be used as the switches of a television, a microcomputer, a telephone, and other electronic devices.

Description

Photoelectric lock

The utility model relates to electronic instrument, facility switching Photoelectric lock.

More existing electronic instruments, equipment as television set, microcomputer, telephone etc., are generally touch, push-button mechanical formula switch, use such switch, anyone might arbitrarily open, and is not easy to equipment management, cause device damage easily, also be not easy to maintain secrecy.

The purpose of this utility model provides a kind of Photoelectric lock, is used to control the opening and closing of above-mentioned electronic instrument, equipment, by corresponding key operated Photoelectric lock, just can make device power supply (DPS) connect or open.

Technical scheme is as follows:

Fig. 1 is the technical scheme theory diagram, and Fig. 2 is the hardware schematic diagram of photoelectric detective circuit and key.

The utility model is made up of photoelectric detective circuit (1), " pellet shot from a slingshot " circuit (2), comparison circuit (3), executive circuit (4), key (5) and microswitch (6).Described photoelectric detective circuit, " pellet shot from a slingshot " circuit output end connect comparison circuit, and comparison circuit connects executive circuit.Photoelectric detective circuit is made of some groups of photoelectric tube groups, and key (5) is gone up porose (7).The course of work is, key inserts photoelectric detective circuit (plate), and front end top microswitch (6) is connected power supply, and the photoelectric tube group detects hole on the key, and picked up signal input comparison circuit; When connecting power supply, the signal in " pellet shot from a slingshot " circuit is also imported comparison circuit, and comparison circuit compares two paths of signals, and when corresponding unanimity, promptly to executive circuit input unlocking signal, executive circuit is the control appliance on-off circuit then, connects power supply.Extract key out, device power supply (DPS) is promptly closed.

In conjunction with the embodiments the utility model is elaborated.

Fig. 3 is the circuit theory diagrams of embodiment 1.

The photoelectric detective circuit of present embodiment (1) is made of four groups of photoelectric tube groups, and output is used A respectively ₁～A ₄Expression, photoelectric tube group (8) is by transmitting tube D ₁, receiving tube Q ₁And R ₁, R ₂Form transmitting tube D ₁Connect flows resistance R ₁Receiving tube Q ₁Connect load resistance R ₂, transfer current signal to voltage signal.Two of respective aperture are arranged on the key.When the key insertion puts in place, connect power supply, transmitting tube is luminous, hole by on the key shines on the receiving tube, present embodiment is: receive the receiving tube of illumination, by the load resistance output low level, do not receive the then output high level of illumination, do not receive illumination, illustrate that key piece do not establish the hole at this place.The high and low level of photoelectric detective circuit output is respectively with A ₁～A ₄End input comparison circuit.According to the relation that is provided with in hole on the present embodiment key piece, A ₁, A ₄Be high level, A ₂, A ₃Be low level.

" pellet shot from a slingshot " circuit (2) has by D ₂, the fuse utmost point (9) and resistance R ₃The cell memory of forming, the photoelectric tube group quantity in cell memory quantity and the photoelectric detective circuit is corresponding.The fuse utmost point is established four, respectively with D ₂Be composed in series memory, the utmost point output low level that has fused, the utmost point of fusing output high level is respectively with B ₁～B ₄End input comparison circuit, for photoelectric detective circuit in output corresponding consistent, promptly the first, the 4th utmost point fuse does not fuse B ₁, B ₄And A ₁, A ₄Be high level; Second, third utmost point fuse is fusing, B ₂, B ₃And A ₂, A ₃Be low level.The output of high and low level can also be other modes, as: A ₁, B ₁Be high level, all the other are low level, or A ₁, B ₁Be low level, other are high level, or the like.

Comparison circuit has by " XNOR " gate and D in (3) ₃, R ₄The unit group that wired AND constitutes, photoelectric tube group in the quantity of this unit group and the photoelectric detective circuit, the fuse number of poles in " pellet shot from a slingshot " circuit are consistent, be four groups, two inputs of this unit group meet the corresponding output end of photoelectric detective circuit, " pellet shot from a slingshot " circuit, i.e. A respectively ₁, B ₁Connect a unit group, A ₂, B ₂Connect another unit group, remainder is analogized.The comparison circuit of present embodiment relatively after the unanimity, is imported unlocking signal with the form of output high level to executive circuit at signal.

Executive circuit (4) is made up of drive circuit and relay, also can be executive circuit shown in Figure 5.When being made up of drive circuit and relay, drive circuit is by R ₅, Darlington clad pipe Q ₂, Q ₃And the D that shields ₄Form.By the high level unlocking signal of comparison circuit input, through R ₅Deliver to Q ₂Base stage, make Q ₂, Q ₃Conducting, relay adhesive, equipment energising.When adopting executive circuit shown in Figure 5, by R ₆, clad pipe Q ₄, Q ₅With switch triode Q ₆Form Q ₆Emitter stage connect the device power supply (DPS) positive pole, colelctor electrode connects circuitry.By the high level unlocking signal of comparison circuit input through R ₆Deliver to clad pipe Q ₄Base stage makes Q ₄, Q ₅Conducting, and make Q ₆Device power supply (DPS) is connected in conducting.Executive circuit shown in Figure 5 can be used as the part of instrument, device line, and is used to control dc source.

Embodiment 1 subelement model: D ₁Be the miniature infrared transmitting tube of TLN104, Q ₁Be the TLP104 infrared receiving tube; Gate model in the comparison circuit is MC14077BCP; Microswitch K is the SS-5GL type, and supply voltage is 12 volts.

What of unit group respective numbers in the photoelectric tube group quantity of the present utility model and the fuse utmost point, the comparison circuit determine the security performance of this lock, and its quantity is many, good confidentiality; Otherwise confidentiality is poor.

Fig. 4 is the schematic circuit of embodiment 2.The photoelectric tube group of present embodiment is eight groups, and the quantity of the fuse utmost point and unit group correspondingly.The element of photoelectric tube group and connecting with embodiment 1 is quantitative difference, " pellet shot from a slingshot " circuit, comparison circuit roughly the same, executive circuit is with embodiment 1.In addition, the quantity of photoelectric tube group also can be 2,5,10,16,32 etc., and the fuse utmost point, unit group quantity are corresponding.

Embodiment 3.Fig. 6 is a theory diagram, and Fig. 7 is a schematic circuit.For improving privacy degrees, " pellet shot from a slingshot " circuit is established two cover memories, and the fuse utmost point in every cover constitutes with embodiment 1, and key should be two mutually, and sets up address decoding circuitry (10), storbing gate (11), memory circuit (12) and delay switch circuit (13).The input termination photoelectric detective circuit of address decoding circuitry, two outputs connect " pellet shot from a slingshot " circuit and storbing gate respectively, and storbing gate has two AND gates, two output termination memory circuits, memory circuit output termination executive circuit.Photoelectric detective circuit increases by an output, and the inner formation of photoelectric detective circuit, comparison circuit, executive circuit are with embodiment 1.

The operating principle of embodiment 3.Insert first key, photoelectric detective circuit one is to the comparison circuit input signal, and simultaneously to the address decoder input signal, address decoder is promptly selected the memory in " pellet shot from a slingshot " circuit, selecteed memory is then to the comparison circuit input signal, and address decoder also passes through X simultaneously ₁Output is opened an AND gate of gating, and comparison circuit compares two paths of signals, when consistent, and then to the storbing gate input signal, an AND gate job of storbing gate at this moment, to the memory circuit input signal, memory circuit keeps memory to signal.At this moment, extract first key out, insert second key, address decoder is selected another memory in " pellet shot from a slingshot " circuit, and with same working method, another AND gate of storbing gate is opened, to second signal of memory circuit input.Memory circuit is started working when receiving two signals, and to executive circuit output unlocking signal, executive circuit is then connected circuitry, and equipment is started working, and extracts second key out, and device power supply (DPS) is cut off.The effect of delay switch circuit, the one, control two blanking times that key is normally unblanked, delay switch circuit is set the time of inserting some matched keys piecewise, as not being in the time of setting, has both made and has inserted matched key, and this lock can not opened yet; The 2nd, timely power cutoff reduces power consumption.

In embodiment 3, address decoding circuitry (10) is made up of two phase inverters, also can be known other address decoding circuitries; Storbing gate (11) is made up of two logical doors; Memory circuit (12) is made of trigger (14), (15), AND gate (17) and reset circuit (16); The set end of two triggers is two AND gate outputs of selecting open gate respectively, output termination AND gate (17), and reset circuit is made of elements such as phase inverters, and phase inverter produces pulse when this lock power connection, make trigger reset.Delay switch circuit (13) is by Q ₇, D ₅Form with the monostable circuit (19) of the repeated set that constitutes by trigger elements such as (18), see Fig. 7 for details.Time delay is by timing element R ₈, C determines.When K switch is closed, trigger set, Q ₈Conducting, the C discharge, simultaneously, the Q output low level of trigger reversed-phase output, Q ₇Conducting, the energising of this lock.When K switch disconnects, Q ₃End, the high level of trigger output Q passes through R ₈To the C charging, when the C both end voltage reaches the trigger reset level, circuit counter-rotating, Q ₇Turn-off this lock power supply.

The critical element model of embodiment 3.Phase inverter in address decoder and the reset circuit (16) is the TC4069UBP type, and the logical door is TC4081BP, and the trigger model is TC4013BP, R ₈Be 470K Ω, C is 100 μ F, 12 volts of supply voltages, and present embodiment time delay is about 30 seconds.

" pellet shot from a slingshot " circuit of embodiment 3 is two cover memories.The tricks of memory is many more, and privacy degrees is good more, can be three covers or more, but has a cover at least, and relevant elements in other circuit or unit group quantity are corresponding thereupon.

Suggestion Fig. 1 is the specification digest accompanying drawing.

The utility model privacy degrees is good, use reliable, can with electronic instrument, coordinative composition of equipments production, also can independently make, be convenient to integratedly, attaching has instrument, equipment now.And simple in structure, easy to use, the power consumptive province.

Claims

1, a kind of Photoelectric lock, it is characterized in that constituting by photoelectric detective circuit [1], " pellet shot from a slingshot " circuit [2], comparison circuit [3], executive circuit [4], key [5] and microswitch [6], the output termination comparison circuit of described photoelectric detective circuit, " pellet shot from a slingshot " circuit, the output termination executive circuit of comparison circuit, key [5] is gone up porose [7].

2, according to the described Photoelectric lock of claim 1, it is characterized in that photoelectric detective circuit (1) is made of some groups of photoelectric tube groups, the photoelectric tube group is by transmitting tube D ₁, receiving tube Q ₁And R ₁, R ₂Form transmitting tube D ₁Connecting resistance R ₁, receiving tube Q ₁Meet R ₂

3,, it is characterized in that having by D in " pellet shot from a slingshot " circuit (2) according to the described Photoelectric lock of claim 1 ₂, the fuse utmost point (9) and resistance R ₃The cell memory of forming, the fuse utmost point (9) respectively with D ₂Series connection, R ₃Ground connection, the quantity of this cell memory is corresponding with the photoelectric tube group quantity in the photoelectric detective circuit.

4,, it is characterized in that having by " XNOR " gate and D in the comparison circuit (3) according to the described Photoelectric lock of claim 1 ₃, R ₄The unit group that wired AND constitutes, the quantity of this unit group is corresponding with the photoelectric tube group quantity in the photoelectric detective circuit, and two inputs of every unit group connect the corresponding output end of photoelectric detective circuit, " pellet shot from a slingshot " circuit respectively.

5, according to the described Photoelectric lock of claim 1, it is characterized in that executive circuit (4) is made up of drive circuit and relay, described drive circuit is by R ₅, Q ₂, Q ₃And D ₄Form R ₅Be input, described executive circuit (4) or by R ₆, Q ₄, Q ₅And Q ₆Form R ₆Be input, Q ₆Emitter stage connect the device power supply (DPS) positive pole, colelctor electrode connects circuitry.

6, according to the described Photoelectric lock of claim 1, it is characterized in that having at least in " pellet shot from a slingshot " circuit (2) a cover memory, when being that two covers or two covers are when above, address decoding circuitry (10), storbing gate (11), memory circuit (12) and delay switch circuit (13) are arranged, photoelectric detective circuit increases output, the output of described address decoding circuitry input termination photoelectric detective circuit, two outputs connect " pellet shot from a slingshot " circuit and storbing gate respectively, comparison circuit selecting open gate, storbing gate connects memory circuit, and memory circuit connects executive circuit.

7,, it is characterized in that the quantity of key (5) is corresponding with the memory tricks in " pellet shot from a slingshot " circuit according to the described Photoelectric lock of claim 6.

8, according to the described Photoelectric lock of claim 6, it is characterized in that: described storbing gate (11) is made up of the logical door, the quantity of logical door is corresponding with the tricks of memory, described memory circuit (12) is made of trigger, AND gate (17) and reset circuit (16), flip flop number is corresponding with the memory tricks, logical door in the set termination storbing gate of every trigger, AND gate (17) is an output.

9,, it is characterized in that delay switch circuit (13) is by Q according to the described Photoelectric lock of claim 6 ₇, Q ₅Form with the monostable circuit that can repeat set (19).