Communication circuit between active equipment and inactive equipment as well as lock

Abstract

The invention discloses a communication circuit between active equipment and inactive equipment as well as a lock. The communication circuit realizes the power supply and the data transmission of the inactive equipment through controlling a switching power device of the active equipment, and maintains the electrical energy required for communication through an energy-storage capacitor, thus the circuit has a simple design and reliable performance. The lock comprises an electronic key and a lock body which are separately designed; the lock body is the inactive equipment; the electronic key is the active equipment; the two-way data transmission between the electronic key and the lock body as well as the power supply for the lock body by the electronic key are realized through a two-wire system; the communication circuit has a simple structure and reliability; and in addition, the lock body per se does not comprise a power source and is power-supplied by the electronic key when being unlocked, thus the power consumption is low.

Description

technical field [0001] The invention relates to the technical field of electronics and locks, in particular to a communication circuit between an active device and a passive device, and a lock with the communication circuit. Background technique [0002] Generally speaking, an electronic device with a power source is an active device, while an electronic device without a power source is a passive device. At present, the power supply and communication between active equipment and passive equipment are mostly completed by three-wire or four-wire system, and the structure of power supply and communication circuits is complex. [0003] Existing locks include mechanical locks and active electronic locks. Mechanical locks (such as door locks that require a key to open) do not require power, but the security is not high enough, and mechanical keys need to be carried, which is inconvenient to use; active electronic locks (such as fingerprint locks, digital password locks) have high...

AI Technical Summary

Problems solved by technology

At present, the power supply and communication between active equipment and passive equipment are mostly completed by three-wire or four-wire system, and the structure of power supply and communication circuits is complex.

[0003] Existing locks include mechanical locks and active electronic locks. Mechanical locks (such as door locks that require a key to open) do not require power, but the security is not high enough, and mechanical keys need to be carried, which is inconvenient to use; active electronic locks (such as fingerprint locks, digital password locks) have high security, but require power supply (power battery or battery), and high power consumption. Once the power supply fails, the lock cannot be opened. The general method is to add a set of opening methods to the lock, such as Use a mechanical key as a backup opening method. In some occasions, such as drawer locks, the volume requirement is small and the cost control is low. This structure is not allowed

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