CA2264194A1 - Electrically triggered safety-deposit box lock - Google Patents

Abstract

The invention concerns an electrically triggered safety-deposit box lock with a housing (1), a locking bar (2), a control lever (5) provided with magneto inductor (4) and influenced by the locking bolt (5), a fixed solenoid (3) and a locking device coupled with the control lever (5).
The task of the invention is to design the magnetic mechanism as especially simple and reliable.
In accordance with the invention a lateral slide (6) serves as the locking device and is displaced against the force of a spring, whereby one end of the control lever (5) is supported on the lateral slide (6) and a control pin (2a) of the locking bar (2) touches on a control bevel (5b) of the control lever (5).

Description

Electrically trie~ered safety-deposit box lock The invention concerns an electrically triggered safety-deposit box lock with a housing, a locking bar supported in this housing, a fixed solenoid and a control lever provided with a magneto inductor which is displaced by a pin of the locking bar and controls a locking device.
S Such a lock is known from EP 0228027. Two relatively complicated control and locking levers are supported on a common pin and able to swivel and are coupled by means of a tension spring. The control lever features a turning pin channel, the locking lever a magnet armature. The control and locking levers lie in the lock housing below the principal locking bar, whereas the solenoid associated with the magnet armature is located in a recess on the rear side of the lock housing.
This type of construction not only requires expensive casting dies for the housing, which is provided with recesses in the front and at the rear, but also narrow tolerances for the manufacture and the lining up of the lever mechanism mentioned.
The task of the invention is to simplify the manufacture of the locks which are triggered by holding-magnet techniques and at the same time to increase their reliability.
An additional task of the invention is to develop the housing, locking bar and magnet mechanisms in such a way that, depending on the particular product requirement, a tumbler lock can be integrated as a second closure or a lock cylinder can be integrated in the housing. A variant should also be possible which is exclusively electrically triggered and the locking bar is moved by a rotary knob.
In accordance with the invention a lateral slide serves as a locking device and is displaced against the force of a spring whereby one end of the control lever is supported on the lateral slide and a control pin of the locking bar touches on a control bevel of the control lever.
In the preferred design form the lateral slide, the control lever and the solenoid are supported on the base of the box-shaped housing. Above it lies the locking bar on which either a tumbler subassembly or a lock cylinder is placed. In the case of a merely electrically controlled lock a handle with blade and two-way key bit is inserted. For these three different types of design one only requires two different lock covers, namely one with a two-way keyhole and one with a preformed recess for the lock cylinder.
An example of execution of the invention is explained on the basis of Figs. 1 -10.
S Fig. 1 shows the closed lock, Fig. 2 an attempt to open without current, Fig. 3 correct opening with a current impulse, Fig. 4 the lock with tumbler subassembly seen disassembled in perspective, Fig. 5 a variant with lock cylinder, Fig. 6 the lock with handle, Fig. 7 an execution form with tumbler subassembly and power supply via the locking bar, Fig. 8 the variant with lock cylinder and power supply via the locking bar, Fig. 9 a form of construction with handle and power supply via the locking bar, Fig.lOa-a are different vie~rs of the control lever.
In F,ig. 1 the box-shaped housing is designated with 1, and the locking bar 2 projects out of it. A solenoid 3 is attached to the base of the housing on which an armature 4 designed as a.triangle sits. This armature is supported on a control lever S. This lever rests with its left end on a lateral slide 6, whose locking block 6a locks or releases the locking bar 2.
A swivel 7 lies in a recess of the locking bar 2, and can be swivelled around the rod 8 which is fixed to the housing. A nose 7a of the swivel 7 picks up the locking bar 2. The swivel 7 has the task of translating the movement of the key bit or of the lock cylinder cam into a greater movement.
The lock housing 1 has three cast-on hollow supporting columns 1 a, 1 b, 1 c which serve for fastening on the lock.
In the right, lower corner of the housing 1 there is a printed circuit board 9 which carries a microswitch 10 in addition to the electronic components. Its function will be explained later.

It is advantageous to mount a second microswitch on the printed circuit board 9, the tip-lever of which passes through a hole in the lock cover and lies on the door surface. If a thief tries to knock away the lock with force, the alarm will be triggered by this microswitch.
Fig. 2 shows an opening attempt without current. If one moves the locking bar 2 a few millimetres to the right its control pin 2a pushes the right end of the control lever 5 upwards. The armature 4 is lifted off from the yoke of the solenoid 3.
The testing movement of the locking bar 2 is limited by a blocking edge on its underside hitting against the locking block 6a of the lateral slide 6.
In Fig. 3 the locking bar 2 has been completely drawn back. If the solenoid 3 clings to the armature 4 then the control pin 2a presses the left end of the control lever 5 upwards. The lever takes along the lateral slide 6 against the force of a small spring until the locking block 6a lies at the housing wall and the locking bar 2 is free to move.
All individual details and variants are treated exclusively in the context of Figs. 4 - 9. In Fig.; 4 the deep housing 1 is shown three-dimensionally. The locking bar head is led between hollow columns 1 a and 1 b, and it emerges from the rectangular opening 1 d. The principal bearing bolt 11 guides the tumbler subassembly 12 and other parts.
Below in the housing there are two moulded crosspieces 1 e, 1 f which guide the lateral slide 6. Its locking block 6a normally lies below the locking bar 2. A rod 6b extends into an aperture Sa of the control lever 5. The control pin 2a of the locking bar 2 moves the control lever 5 by means of a control bevel Sb.
The swivel 7, a special tumbler 13 and the tumbler subassembly 12 are shown above the locking bar 2. Apart from mounting holes a lock cover 14 features a two-way keyhole 14a.
Apart from the locking bar 2 a latch 1 S is supported in the lock housing 1, and this in a known way prevents the locking bar 2 from being run out and the key being withdrawn if the door is not lying in the frame. When the door is pressed in, the latch 15 makes way to the right and pushes a locking block 16 resting on the housing floor and this releases the locking bar 2 by means of a control edge 16a.

In addition, the latch 15 displaces an actuating lever 17 supported on the main rod 11, and its arm 17a activates the microswitch 10 (Fig. 1). Therefore an indication can be given in a control station whenever the locker door is opened or closed.
Fig. 4 shows the lock variant in the most frequently used form: the customer or renter opens the deposit box with his two-way key after a supervisory person has verified the access authorisation and has released the deposit box by an opening impulse.
Fig. 5 shows another type of construction, in which parts 1, 2, 5, 6, 7, 15, 16 and 17 completely concur with those of Fig. 4. The sole difference is that in place of the tumbler subassembly 12 and the cover 14 a cover 18 is fitted and this carries a cylinder lock 19.
This cylinder lock rests in a cast-on cylindrical bearing flange 18a of the cover. The locking arm of the cylinder 19 is designated with 19a.
Fig. 6 shows a variant with only one lock system. For locker installations in the recreational sector or elsewhere, where the installations are not supervised, on cost grounds one dispenses with a mechanical lock and controls the opening by means of an entry keyboard or a coded card.
The cover 14 corresponds to that of Fig. 4. In the place of a two-way key a handle 20 with a stem 21 and two-way key bit 21 a is used.
A leg spring 22 stabilises the position of the parts.
All other components can be fixed pre-assembled so that any number of the required lock version can be completed in the shortest possible time.
Fig. 7 shows a type of construction in which the release current is fed via the head 2b of the locking bar 2. A contact pin is integrated into the locking bar head 2b for this purpose and it is connected with the printed circuit board 9 by a line 23 (Fig. 1). A
second connection lies on the body of the locking bar or the metal housing.
The supply of current is then effected by means of contact springs in the frame of the safe-deposit box. This has the advantage that it is not necessary to lead a release cable, which may be susceptible to failure, from the door to the frame.

In Fig. 8 the current is supplied in the same way as in Fig. 7. In all other details the design corresponds to that of Fig. 5.
In Fig. 9 also the current supply is effected by means of locking bar head 2b and the line 23.
In Figs. l0a and lOb the control lever 5 is shown from the side and from above. Apart from the aperture Sa and the control bevel Sb one can see a rod Sc which takes up the armature 4. Behind the rod Sc lies a sprung hook Sd which yields on inserting the armature 4 and prevents the falling out of this armature.
Fig. lOc gives the perspective view of the control lever from above, Fig. lOd from below.
One sees that below the hook Sd a groove Se is provided which ensures the elastic flexibility of the hook Sd. The part 5 is die-cast from an impact-resistant thermoplast so that it can be manufactured very precisely and at advantageous cost. The armature 4 is easily fitted and held secure without the use of a spring lock washer or the like.
With three basic variants and the current supply via the locking bar head or a housing cable one obtains six different end products with a minimum of casting dies, so that with the smallest possible stock of components one can deal very quickly with a variety of customers' requirements.
If one includes the option of a microswitch as a take-off contact, then with very few basic components one obtains twelve different lock types.
In the sequence of manufacturing and in the holding of stock it is important that the key guide pin is not cast on or inserted in the housing immediately because it is certainly not required for the variants shown in Figs. 5, 6 and 9. Rather this pin is first press fitted in the final assembly of the variants shown in Figs. 4 and 7.

List of reference numbers 1 Housing 1 a, Hollow columns 1 b, 1 c 1 d Aperture 1 e, Crosspieces 1 f 2 Locking bar 2a Control pin 2b Locking bar head 3 Solenoid 4 Armature Control lever 5 a Aperture Sb Control bevel 6 Lateral slide 6a Locking block 6b ' Rod 7 Swivel 7a Nose 8 Rod 9 Printed circuit board Microswitch 11 Principal bearing bolt 12 Tumbler subassembly 13 Special tumbler 14 Lock cover Latch 16 Locking block 17 Actuating lever 17a Arm . _ 2 18 Lock cover 19 Lock cylinder 19a Locking arm 20 Handle 21 Stem 21 a Two-way key bit 22 Leg spring 23 Line

Claims (9)

1. An electrically triggered safety-deposit box lock with a housing, a locking bar supported in this housing, a fixed solenoid and a control lever provided with a magnet armature which is displaced by a rod of the locking bar and which controls a locking device, characterised by, the fact that a lateral slide (6) serves as locking device and is displaced against the force of a spring, the fact that an end of the control lever (5) is supported on the lateral slide (6) and that a control pin (2a) of the locking bar (2) touches a control bevel (5b) of the control lever (5).

2. Safe-deposit box lock in accordance with Claim 1, characterised by, the fact that the control bevel (5b) lies in the middle area of the control lever (5).

3. Safe-deposit box lock in accordance with Claims 1 and 2, characterised by, the fact that a latch (15) is supported in the lock housing (1) and which only in the pushed-in state enables a running out of the locking bar (2) and that this latch (15) activates a microswitch (10) by means of an actuating lever.

4. Safe-deposit box lock in accordance. with Claim 1, characterised by, the fact that a tumbler subassembly (14) lies on the locking bar (2), that it is coded by a two-way key, whereby the locking bar (2) is moved by means of a swivel (7).

5. Safe-deposit box lock in accordance with Claim 1, characterised by, the fact that a lock cylinder (19) is fitted in the lock cover (18), and its locking arm (19a) drives the locking bar (2) by means of a swivel (7).

6. Safe-deposit box lock in accordance with Claim 1, characterised by, the fact that a handle (20) is provided for activation of the lock and that this acts upon the locking bar (2) by means of a two-way key bit (21a) and a swivel (7).

7. Safe-deposit box lock in accordance with Claims 4, 5 or 6, characterised by, the fact that the supply of current for the solenoid (3) is effected by means of the locking bar (2), which carries a contact pin on the head (2b), and which only makes a contact to the control unit and current source when the locking bar (2) is run out.

8. Safe-deposit box lock in accordance with Claims 1 and 2, characterised by, the fact that the control lever (5) is comprised of impact-resistant plastic, that a retaining pin (5c) is attached for the magnet armature (4) and that a sprung hook (5d) is attached parallel to the retaining pin (5c) and this prevents the falling out of the armature (4).

9. Safe-deposit box lock in accordance with Claims 1 and 2, characterised by, the fact that the printed circuit board (9) carries a second microswitch which serves as a lift-off contact and which triggers an alarm on the deformation of the lock housing screwed to the door.