FR2835865A1 - Autonomous anti-break, in lock for door, has series of spring action locks remotely operated by cables guided in sheaths - Google Patents

Abstract

The autonomous anti-break in lock for a building door has no exterior components which could be fractured. The lock (1) has a store for energy actuated by the operator and a series of locks which have a spring action to lock the door. The lock can be controlled remotely by radio. The spring (4) locks can be controlled by cables (13) sliding in sheaths.

Description

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 The present invention relates to a self-contained burglar-resistant lock intended for the doors of technical cabinets arranged in public places, for example, one can cite the cabinets containing the device for controlling the traffic lights located at the roadside.

 The closing of these cabinet doors is traditionally ensured by mechanical key locks, which imposes a visible part of the lock: the cylinder.

This visible part therefore undergoes break-ins.

 The lock according to the invention overcomes this drawback since it has no external parts.

 According to a first characteristic, it comprises a housing containing a mechanical energy accumulation system located inside the door.

 According to a second characteristic, it comprises one or more points for hanging the door on its frame; these attachment points are of the spring latch type.

 According to a third characteristic, these attachment points are connected to the energy storage unit by cables mounted under sheaths.

 According to a fourth and last characteristic, the order to trigger the opening is made either by radio signal or by coded signal via flush contacts located on the front face of the door.

 The accompanying drawings illustrate the invention.

Figure 1 shows the energy storage unit; in solid lines the lock is in the closed position, in broken lines it is shown in the open position.

Figure 2 shows the spring lock hooking points
Figure 3 shows the flush contact points.

 With reference to these drawings, the lock comprises a housing (1) at the bottom of which is fixed a plate (2). A lever (3) pulled by a large spring (4) is articulated on the axis (5). Its travel is retained by the lever (6), itself articulated on the axis (7) and pulled by the small spring (8). The movement of the lever (6) is prevented by the lever (9) articulated on the axis (10) and pulled by the small spring (11). The lever (9) is pulled by an electromechanical system (12) of the electromagnet or thermal actuator type.

 The closed position of the lock (shown in solid lines) shows that the energy storage spring (4) must be previously bandaged by manual action on the lever (3) or by automatic action (not shown) when opening the door.

levier (6) libérant lui-même le levier principal (3) sur lequel sont fixés le ou les câbles (13) qui iront déverrouiller la porte en tirant sur le ou les verrous à ressort. The operation is as follows: the electromagnet (12) pulls the lever (9) which releases the

lever (6) releasing itself the main lever (3) on which are fixed the cable (s) (13) which will unlock the door by pulling on the spring bolt (s).

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 The whole kinematics reduces the effort required to trigger the lever (3) thanks to the gear ratios of the three levers. This arrangement has been adopted in order to considerably reduce the tripping forces and therefore the energy required to open the lock. In fact the main and important energy intended for the opening is provided by the operator when he arms the spring (4), and the weak energy intended to release this spring (4) is taken in electric form inside the cabinet to be protected or, alternatively, arrives from the outside via flush contacts. This electrical energy is transformed into mechanical energy by the actuator (12).

 According to a second characteristic, the lock is provided with one or more attachment points called spring latches.

 This spring latch is composed of a fixing base (14) in which slides a beveled bolt (20) kept released by a spring (15) bearing on a stop (21). This bolt is connected to a cable (16). To close it is necessary to slam the door.

 According to a third characteristic the spring bolt (s) can be positioned anywhere on the periphery of the door because they are actuated by a cable (16) sliding in a sheath (17) which bears on the housing (1) d 'on one side and on the plate (14) on the other.

 According to a fourth characteristic, the order in which the lock is triggered is carried out by a radio signal, the latter being supplied inside the cabinet to be protected or, alternatively, by a coded key ring having its own energy. In this case the energy and the coded signal pass through flush contacts (18) placed on the door and isolated from the latter by sleeves (19). The flush contacts are conventional screws simulating fasteners.

Claims (9)

CLAIMS 1) Self-contained burglar-resistant lock characterized in that it has an interior housing containing an energy storage system. 2) autonomous burglar-resistant lock according to claim 1 characterized in that the inner housing transmits the movement to one or more spring latches. 3) autonomous burglar-resistant lock according to claim 2 characterized in that the spring bolt (s) are controlled by cables sliding in sheaths. 4) autonomous burglar-resistant lock according to claim 1 characterized in that the energy storage spring is bandaged by manual action. 5) autonomous burglar-resistant lock according to claim 1 characterized in that its triggering is ensured by radio control. 6) autonomous burglar-resistant lock according to claim 1 characterized by an external energy supply and a coded signal, via flush contacts. 7) Autonomous burglar-resistant lock according to claims 1 characterized in that it has a kinematics which thanks to the gear ratios, reduces the effort and therefore the energy necessary for the opening of the lock. 8) autonomous burglar-resistant lock according to claim 6 characterized in that the flush contacts are conventional screws simulating fasteners. 9) Autonomous burglary lock according to claims 1 characterized in that the actuator releasing energy can be thermal or an electromagnet.