CN201258637Y - Protection arrangement for preventing electronic lock from being destroyed by strong current - Google Patents

Abstract

The utility model provides a strong current damage prevention protection device of an electronic lock, which employs a mechanical lock head which uses a mechanical key to rotate a lock core rotor so as to gain unlocking authorization; the protection device is characterized in that the lock core rotor is used as a touching part; the lock head at the corresponding position is fixedly provided with a micro-switch K which takes a touching spring as a switch contact; different rotation positions of the lock core rotor are corresponding to the closing or opening of the switch contact of the micro-switch; the input terminal and the output terminal of the switch contact of the micro-switch are connected in series in the power line or signal line of an electronic key contact and a lock control circuit. After strong current invades, the electronic lock strong current damage prevention protection device can effectively protect the electronic control device in the electronic lock from being damaged by strong current and enhance the anti-damage capability of the lock.

Description

Electronic lock anti-strong electric damage protection device

technical field

The utility model relates to an electronic lock control circuit protection device.

Background technique

All kinds of electronic locks have control circuits. Since the active electronic lock has a power supply inside the lock, when the key and the lock are unlocked in a non-contact manner, this type of lock is not easily damaged by strong electricity. In this way, regardless of whether the electronic lock is active or not, this kind of lock may be damaged by artificial strong electricity.

For lock systems that require the key to be in contact with the electronic lock to unlock, there are generally two to four electrical contacts for providing power or information source access. When strong electricity is in contact with these electrical contacts, the lock control device without strong electricity protection may be destroyed, resulting in the inability to unblank, and sometimes unblanking by mistake.

Application No. 200420021164.4 titled "An Electronic Lock Circuit Device" utility model patent application discloses an electronic lock circuit device that prevents strong current from unlocking. The disadvantage of the above technology is that when the strong electricity reaches a certain level, the fast fuse will be blown or the electronic lock control circuit will be damaged, thereby causing the actual destruction of the lockset. Thereby said device can only protect strong electricity from unblanking, and can not protect electronic lock from being destroyed by strong electricity.

Utility model content

The utility model is to avoid the disadvantages of the above-mentioned prior art, and provides an electronic lock anti-strong electric damage protection device, so that under the intrusion of strong electricity, the electronic lock will not be opened by mistake, and the electronic lock can be locked. Ensure that the lock control circuit is not damaged to protect the safety of the entire lock.

The utility model solves the technical problem and adopts the following technical solutions:

The electronic lock anti-strong electric damage protection device of the utility model adopts a mechanical lock head which is rotated by a mechanical key to obtain a lock core rotor to obtain unlocking authorization.

The structural feature of the utility model is that the lock core rotor is used as the touch piece, and the micro switch K with the touch reed as the switch contact is fixedly arranged in the lock head at the corresponding position. The different rotation positions of the lock core rotor correspond to The switch contact of the micro switch is closed or opened; the micro switch K is set in series with the input terminal COM and output terminal NO of the switch contact in the electronic key contact and the power line or signal line of the lock control circuit.

The structural feature of the utility model is also that the lock core rotor is provided with fan-shaped cutouts along the axial direction on the outer periphery of the cylindrical rotor, and the states corresponding to the different rotation positions of the lock core rotor are respectively: the circular arc of the lock core rotor When the contact surface of the lock cylinder is against the touch reed, the switch contact of the micro switch is closed; or the fan-shaped cutout on the outer circumference of the rotor of the lock core is against the touch reed, and the switch contact of the micro switch is opened.

Compared with the prior art, the beneficial effects of the utility model are reflected in:

1. The utility model can prevent the electronic lock from being accidentally opened under the invasion of strong electricity, and can also ensure that the lock control circuit is not damaged, so as to protect the safety of the entire lock.

2. The utility model utilizes the micro switch to achieve electrical connection between the inside and outside of the physical isolation, the insulation resistance is large, the withstand voltage is high, the electronic key and the lock control circuit are not directly connected, and the volume is small and exquisite.

3. The lock end of the mechanism of the utility model as the authorization device has a very conventional prior art, and its cost is low, and the lock cylinder is simple to change.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the mechanical lock head of the present invention.

Fig. 2 is a schematic diagram of the cooperation structure between the micro switch and the lock core rotor in the mechanical lock head of the present invention.

Fig. 3 is a schematic diagram of the protection circuit of the present invention.

The utility model will be further described below in conjunction with the accompanying drawings through specific embodiments.

Labels in the figure: 1 lock cylinder rotor, 2 mechanical lock head, 3 micro switch, 4 fan-shaped cutout, 5 fixing bolt, 6 contact reed, 7 mechanical key.

Detailed ways

Referring to Fig. 1, a mechanical lock head 2 is used to rotate the lock cylinder rotor 1 by a mechanical key 7 to obtain an unlock authorization; the lock cylinder rotor 1 is used as an actuating member, and in the corresponding position of the lock head, a trigger reed 6 is fixedly arranged as a The micro switch 3 of the switch contact, the different rotation positions of the lock cylinder rotor 1 correspond to the closing or opening of the switch contact of the micro switch 3;

Referring to Fig. 2, in specific implementation, improvements can be made to conventional mechanical lock heads, wherein, the lock cylinder rotor 1 is provided with fan-shaped cutouts 4 in the axial direction on the outer circumference of the cylindrical rotor, and the different rotation positions of the lock cylinder rotor 1 correspond to The states are respectively: when the circular arc surface of the lock core rotor 1 is offset against the touch reed 6, the switch contact of the micro switch 3 is closed; The switch contact of 3 is open. The maximum stroke of the touch reed 6 is determined by the half-way of the lock cylinder rotor 1. When the mechanical key 7 is reset and taken out, the lock cylinder rotor 1 is reset, and the touch reed 6 is also restored to its original state. The micro switch K operates to cut off the relevant circuit connection .

Referring to Fig. 3, the micro switch K is arranged in series with the input terminal COM and the output terminal NO of the switch contact in the electronic key contact and the power line or signal line of the lock control circuit.

The circuit shown in Figure 3 shows the strong current protection method of the three-core contact electronic lock. The electrical protection circuit is composed of one to three micro switches. The micro switch K uses its switch contact input terminal COM to contact the electronic key. Point connection, the output terminal NO of the micro switch K is connected with the power supply or signal of the lock control circuit. The mechanical key is used for authorization. In the case of unauthorized access, there is only one electrical connection between the electronic key contact and the lock control circuit, which does not constitute an electrical circuit, thereby protecting the lock control circuit. After being authorized, the contact reed of the micro switch K is pressed down, and a pair of input terminals COM are respectively connected to their respective output terminals NO, so as to realize the circuit of supplying power and communication to the lock control circuit.

Claims (2)

1, strong electricity destroying-proof protecting device of electronic lock adopts by the mechanical type tapered end (2) of mechanical key (7) rotational lock core rotor to obtain to unblank to authorize; It is characterized in that with described lock core rotor (1) be touch part, in the tapered end of correspondence position, fixedly install touching the microswitch K (3) of reed (6) as switch contact, the different turned position of lock core rotor (1) is closed or open corresponding to the switch contact of microswitch (3); Described microswitch K (3) is arranged in the power line or holding wire of electron key contact and lockset control circuit with the input COM and the output ON series connection of its switch contact.

2, strong electricity destroying-proof protecting device of electronic lock according to claim 1, it is characterized in that described lock core rotor (1) be at cylindrical rotor periphery, vertically fan-shaped otch (4) is set, the different pairing state in turned position of described lock core rotor (1) is respectively: offset the switch contact closure of microswitch (3) with lock core rotor (1) periphery arc surface and shake-up reed (6); Or the fan-shaped otch of lock core rotor (1) periphery (4) offsets the switch contact unlatching of microswitch (3) with touching reed (6).

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