Electronic lock is commonly used electronic circuit control, with electromagnet (or micro electric) and lock body as electromechanical integration of insurance of the actuator device. There are many different kinds of electronic lock, but according to unlock Can be roughly divided into two categories: electronic lock and password lock with keys.

Key electronic lock

This kind of lock using coupling plug or card as the lock key. The plug and keys

Is part of the electronic lock, only for the use of personnel, it security and confidentiality of the performance by the keys. Applications in large hotels, restaurants and other services. This kind of lock key and has a variety of control circuit of coupling way, common has the following kinds:

Coupling (rectifier power supply key)

It is applicable to the mains power electronics, power supply control circuit on the lock body

Tong, are done by key, the key into the keyhole, control circuit without electricity, does not work. Key is itself a rectifier, and only when the key in the lock body, through the keys on the contact, only rectifier for control circuit operation or driving power supply of electromagnetic, iron (micromotor) action, open the lock.

Magnetoelectric coupling type electronic lock

This kind of lock using non magnetic CARDS as the key, according to the design requirements, on the card

Small magnets on a chip are arranged and paste on it, and set in the corresponding control circuit of the lock body dry reed pipe, when the cardholder will card near the dry reed pipe (to aim at location), dry reed pipe or connected, or disconnected, the birth control circuit of the internal contact bit flux, change, to encode control circuit drive, and open the lock. Due to the electronic lock installed in the inside of the door locks, door without holes, only who is familiar with the door lock installation or master will quickly open the lock. If in this kind of lock with alarm circuit, outsiders trying to open the lock, the card's position is not right, not only the lock won't open, can also trigger alarm device.

Resonant electronic lock

This key with aluminum foil CARDS, commonly used the locks on the control circuit

For the ferrite core of inductance and capacitance is resonant circuit, when the aluminum foil CARDS close to the inductive magnetic core, because of its vibration a.c. circuit oscillation parameters change, the oscillation change vibration (and even stop). Will be the size of the oscillating voltage were identified, and the execution of the pulse as driving the lock parts, to open the lock.

Photoelectric coupling type electronic lock

Photoelectric coupling type electronic lock is actually use the hair, the transmission of light card

Light path to control and coding, light source can use light emitting diode (LED), the receiver can use neon or light activated triode, light source, which has two kinds of visible light and infrared light, infrared light is not visible, the confidentiality will be better.

Electronic password lock

If press the lock button digital switches are in conformity with the preset combination, the lock

The circuit comparison, discriminant inside the head, perform unlock drive pulse, automatically open the lock. , the if digital lock does not open, also can report to the police. According to the order of points at the same time type of password inputs (on) at the same time and sequence type in two types of lock.

To improve the confidentiality of the lock, often in a useful key to add some false keys,

Destruction and alarm keys. Unlock the former is used to confuse outsiders, increase the difficulty (code of permutation and combination group), strengthen secrecy; The latter with locking control circuit, with sound and light alarm signal.

Electronic password lock unlock information stored in a locked master in the brain, unlike the key electronic lock is easily lost or to be generic, combination lock because have these functions, the more suitable for financial or safe, etc.