JPH0513868Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention relates to an emergency unlocking mechanism for electric locks mainly used for the entrances of apartment complexes and the doors of hotel rooms, etc. The present invention relates to an emergency unlocking mechanism that can be safely and quickly unlocked in the event of a lock failure.

(b) Conventional Technology In recent years, with the development of electronics, the locks used on doors are rapidly changing from conventional mechanical locks to electric locks linked to magnetic card readers, numeric keypad devices, etc.

However, the problem with electric locks is that the better the performance and the more robust the lock is, once the lock cannot be unlocked with an electric signal during a power outage or when the internal battery is exhausted, the lock or door must be broken in some way. Recovery may not be possible.

If this is due to a disaster or the like, it will be necessary to open the door urgently to rescue the person inside or inside.

Conventionally, for such cases, many electric locks have been provided with a function that allows them to be unlocked using a mechanical key.

(c) Problems that the invention aims to solve However, no matter how high-performance an electric lock is installed, there is a risk that the lock will be unlocked by a mechanical key, and safety will not improve.

In addition, the structure of the lock itself becomes complicated, making it impossible to manufacture a lock at low cost.

(d) Means for solving the problem The present invention provides a plate having a hole communicating with the manual unlocking means of the electric lock at a position on the back side of the card reader section, and the card is attached to the plate by an attachment/detachment mechanism. The cover member of the reader and the key card having a protruding piece for releasing the locking mechanism of the attaching/detaching mechanism are configured to work in conjunction with an alarm means that is activated when the cover is removed.

(E) Operation In the event of an emergency, for example, the lock can be unlocked manually by removing the fixing means between the plate and the cover member using a key card held by a caretaker, etc. through the hole in the plate. do.

When the cover member is removed, the operating contacts of the alarm device operate to issue an alarm.

(f) Examples The structure of the present invention will be explained below with reference to the figures.

FIG. 1 is a perspective view showing the structure of an embodiment of the present invention, and FIG. 2 is a partial plan view thereof.

In FIG. 1, a so-called electric lock 2, which can be locked and unlocked by an electric signal, is embedded in a door 1. The electric lock 2 has a latch bolt 4 that protrudes and retracts from a front plate 3 and an electromagnetic locking/unlocking mechanism 5 that fixes the latch bolt in a protruding state. Further, the electromagnetic locking/unlocking mechanism 5 is structured such that it can be manually locked/unlocked by inserting a suitable tool into the keyhole 6 and rotating it. A plate 7 attached to the outside of the door 1 is provided with a hole 8 coaxial with the keyhole 6, four stepped portions 9, and a stopper 10. Reference numerals 11 and 12 designate electric contact pieces, and one contact piece 12 has an elongated tip to which an insulator 13 is attached. Reference numeral 14 denotes a cover of the card reader, which includes a reading mechanism 15, a receiving metal fitting 16, a protrusion 17, and an L rotatably supported by a shaft 18.
A mold lever 19 is provided. This cover 14
is attached to the plate 7 by engagement of the stepped portion 9 and the receiving metal fitting 16. The spring 20 is for urging one end 21 of the lever 19 outward. Note that an alarm device 22 is connected to the contact pieces 11 and 12 via lead wires. Further, the two upper receiving metal fittings 16 are provided with projecting portions 23 for restricting the position into which the cover 14 can be inserted downward. 24 is a key card, which has a notch 25 at the center of its tip.

FIG. 2 is a partial plan view showing a state in which the cover 14 of the card reader is attached to the plate 7.

The stepped portion 9 and the receiving metal fitting 16 are engaged with each other, and the stepped portion 21 of the lever 19 is in contact with the bent portion of the stepped portion 9 with the upper projecting portion 23 and the bent portion of the stepped portion 9 in contact with each other. There is. In this state, the card reader cover 14 is fixed to the plate 7 and cannot be easily removed from the outside. or,
Since the tip 13 of the contact piece 12 is in contact with the protrusion 17 and is separated from the contact piece 11, this contact piece 11
and 12 are incorporated into the drive circuit of the electric alarm 22, the alarm 22 is in a non-operating state.

Now, if for some reason you want to open the door using a method other than the normal one, insert the key card 24 into the reading mechanism section 15 of the cover 14 of the card reader.
Because of the notch 25 at its tip, it does not stop at the stopper 10 and can be inserted deeper. Then, the lever 19 is rotated until its end 21 faces inward, and the lever 19 is pushed so as to be removed from the stepped portion 9. If the end portion 21 is removed from the stepped portion 9, the cover 14 of the card reader can be easily removed by moving in the direction of arrow A to disengage the stepped portion 9 from the receiving fitting 16. However, at this time, the contact pieces 11 and 12, which had hitherto been in contact with the protrusion 17 and were in a separated state, come into contact and become closed, so that the alarm device 22 is activated. It is extremely easy to keep the activated alarm device 22 in its activated state even after the connectors 11 and 12 are opened, and therefore, if someone removes the cover 14 of the card reader, If the person is an intruder, the security guard can be notified by people in the room or around the room or by a reporting device linked to the alarm device 22. If there is a justifiable reason, such as when rescuing someone inside, this alarm will not interfere with the work in any way.

Once the case 14 of the card reader can be removed, the keyhole 6 can be inserted through the hole 8 provided in the plate 7.
The door can be unlocked manually by inserting an appropriate tool and rotating it, so all that is left to do is turn the handle or knob (not shown) to open the door.

In addition, the card normally used has a stopper of 10.
The cover 14 of the card reader will not come off inadvertently due to the tip of the card hitting the card. Furthermore, the key card 24 is owned only by a limited number of administrators and is used only in emergencies. However, this emergency unlocking method is extremely simple compared to general mechanical cylinder locks.
It can be manufactured at low cost. However, by linking alarms, crime prevention safety can be maintained at a sufficiently high level.

Further, in this embodiment, the contact pieces 11 and 12 are electrical contact pieces, but it is also outside the scope of the present invention to use them as a release lever for activating a mechanical alarm charged by a spring or the like. It's not a thing.

(g) Effects of the invention As is clear from the above explanation, the emergency unlocking mechanism of the invention is a simple mechanism that can be manufactured at low cost, and can easily unlock electric locks in an emergency. Moreover, it is highly safe in terms of crime prevention and has a wide range of applications, so its practical effects are extremely significant.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the structure of an embodiment of the present invention, and FIG. 2 is a partial plan view thereof. 1...Door, 2...Electric lock, 5...Electromagnetic lock/unlock mechanism, 6...Keyhole, 7...Plate, 8...
Hole, 9...Step, 10...Stopper, 11,1
2...Electric contact piece, 14...Card reader cover, 16...Receptacle, 17...Protrusion, 19...
...Lever, 22...Alarm, 24...Key card, 25...Notch.

Claims (1)

[Scope of utility model registration request] A plate having a hole communicating with the electric lock attached to the door and its manual unlocking means is provided at a position on the back side of the card reader section, and a cover member of the card reader attached to the plate by an attachment/detachment mechanism and the attachment/detachment mechanism are provided. An emergency unlocking device comprising a key card having a protruding piece for releasing a locking mechanism and an alarm means activated in conjunction with the removal of the cover.