JPS63251584A - Electric lock - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The invention relates to an electric lock for an opening/closing device such as a door.

[Conventional technology]

Traditionally, locks and keys for opening/closing devices can be unlocked using the - shape. Some electric locks include the 9-magnet system, which uses permanent magnets, and the T-card lock-n-stem, which uses a gIi card.

[Problem that the invention seeks to solve]

The nine conventional keys mentioned above are made of metal and are heavy.

Rust 2 Mechanical contact wears out a lot. It is easy to duplicate and is very secure.In some cases, even if you do not have a key, you can take a mold of the keyhole and unlock it with a wire after 7tLIII or 1m.
There is a problem with that.

Just in case, even with a conventional key or an electric lock, if the person loses the key, it is difficult to remember the - shaped data and the data recorded on the magnetic card, so it is necessary to replace not only the key but the entire lock itself. There was an inconvenience that it had to be done.

[Problem t-Elaborate means to solve it]

The key to the present invention is that it is fixed in a state where infrared light is transmitted or reflected, and nine series of information amounts are recorded.

On the front side of the lock, a photointerrupter with the same amount of information as the key is completely inserted, and the photointerrupter is lined up at the position determined in the ratio state. recorded in The state of ON10FF is determined by the state of transmission or reflection, and the lock can be unlocked when the combination of outputs of each light receiving element matches the gate circuit of the next stage.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

First, FIG. 1 shows an electric circuit of an embodiment of the lock F#i side of the present invention. Although only one photointerrupter circuit is shown, it is assumed that there are many similar configurations.

The photointerrupter 1 is composed of an infrared light emitting diode 2 and a light receiving phototransistor 3, and is positioned so that infrared rays are transmitted through the space between the pixel elements. When a key is inserted into the space between them, if the object is an object that transmits infrared rays, the infrared rays fI& will be transmitted to the light receiving element, and if the object is an object that reflects infrared rays, the infrared rays will not be transmitted to the light receiving element. The resistor 4 determines the current flowing through the light emitting diode 2, and the power supply voltage (terminal 5)
(applied to). The resistor 6 is an emitter resistor of a light-receiving phototransistor, and infrared rays are received.
When the phototransistor turns ON, the potential of the resistor 6 becomes high level. A plurality of photointerrupters having the above configuration are arranged, and the output of each phototransistor (output voltage of resistor 6) is input to the gate of the next stage.

When the correct key is inserted, the output of the valley phototransistor will be at high level or low level due to the transmission or reflection of infrared rays.
When it becomes C, high level output a9#t! hND) l - N to the door input, lower level output 11° 12.13 etc.
If it is arranged so that it is input to the output of the AND circuit 10 (the output 15 of the AND circuit 14 will be at a high level only when a regular key is inserted), it will be at a low level in other combinations. Therefore, by operating the actuator only when the output 15 is at a high level, it is possible to produce, for example, 8 tablets. It goes without saying that the gate circuit may have any other configuration as long as it is logically similar. There are various methods of locking the door, such as automatic locking when the door is closed, turning the key, and pushing the unlock/lock switch after inserting the key, which are beyond the scope of this invention. . Figure 2 shows a specific example of the photointerrupter section, with 5 photointerrupters.
In the case of 2, it is composed of 5 light emitting diodes 20 to 24 and 5 light receiving elements 30 to 34, and the output on the light receiving side is output in parallel for 5 bits by the aforementioned multilayer resistors 60 to 64. Connected to the next stage gate circuit. In the example shown in FIG. 2, the key 16 is inserted and the key is 20/30.22/32.
The photo interrupter of 23/33 transmits infrared light.Due to the condition of -, the output of ONL, 21/31, and 24/34 is turned off.
Indicates the state of F.

Although only 32 combinations of keys can be created with the above 5-bit information amount, the number of combinations can be easily increased by increasing the number of bits.

FIG. 3 shows an example of the key. To explain this in conjunction with the embodiment shown in FIG. 2, the key body 16t is made of a resin that transmits infrared light, and the solid circle mark 17 is a seal that reflects infrared light trz.
Assuming that b is attached and nothing is done for the broken circle mark 18, it is possible to easily create a nine-key key corresponding to FIG. Furthermore, if the entire structure is covered with a resin that blocks all visible light, the state of each bit becomes invisible and the information can be kept secret.

[Example 2J FIG. 4 shows a second embodiment of the non-inventive key.

Contrary to Embodiment 1, the main body 16 is made of, for example, a thin metal that does not transmit infrared rays, and the solid line circle mark 1 that should transmit infrared t-
Make a hole at 8' and mark the dotted circle mark 1 to reflect infrared rays.
It can be easily produced by covering the entire structure with a resin that transmits only infrared rays without applying any treatment to 7'.

In addition, in reality, considering the combinations, the amount of information is about 10 to 20 bits)) To ensure that the combinations match even when the key is inserted halfway, in this example, the tip bit of the key always reflects infrared rays. Must be JJ! I can accomplish this without any problems. Also, the light emitting diode side needs to be lit all the time, but if you make it emit light intermittently to fully control the power consumption, or install a switch on the lock side and make it emit light only when the light is inserted, the power consumption will be reduced to almost nothing. It is possible to create an electric key without the need for an electric key.

〔Effect of the invention〕

As explained above, according to the present invention, an inexpensive electric lock can be constructed by using a key in which a large number of photointerrupters are arranged and information on transmission or reflection of infrared rays is recorded. By increasing the number of information bits, many combinations are possible.
The key itself can essentially be made of resin, so mechanical strength is not required and it does not rust easily. In addition, it is possible to know the information about your own key in advance, and if you keep it in mind, you can easily recover it even if you lose it at 9 o'clock, and there is no need to remove all the locks from the door as in the past. Furthermore, as with conventional keys, the shape of the keyhole is the same, and it is impossible to forcefully open the keyhole with a wire or the like, which has the great effect of greatly improving safety.

[Brief explanation of drawings]

Fig. 1 is a mechanical equivalent circuit of the lock of the present invention, Fig. 2 is a more specific circuit diagram of a plurality of photointerrupters in the lock, Fig. 3 is a key implementation +yll l 1 Fig. 4 is a key implementation fI42
It is. l...Photointerrupter, 2...Light emitting diode, 3...Light receiving phototransistor, 4
...Current limiting resistor, 5...Power terminal,
6...Phototransistor output resistance, 7...
...AND gate, 8, 9...-AND gate input, 10...NOR, gate, l l, l
2゜13...NOR gate input, 14...
...AND gate, 15...AND gate output, 16...key, 17°17'...infrared reflection bit, 18.18'... Infrared transmission bit, 20-24...Multiple light emitting diodes arranged in proportion, 30-34...Multiple phototransistors arranged in proportion, 60-64...E)) Arrange multiple transistor output resistors in proportion.呵1 diagram 2nd possible 3rd possible 4th

Claims (1)

[Claims] By arranging a large number of photointerrupters in parallel and inserting a key made to transmit or reflect infrared rays to each photointerrupter between the facing light emitting and light receiving elements, the state of the light receiving element side can be determined in advance. An electric lock that can be locked and unlocked only when the condition is met.