EP0253843A1

EP0253843A1 - Electrically powered lock

Info

Publication number: EP0253843A1
Application number: EP87900664A
Authority: EP
Inventors: Louis Bion
Original assignee: Individual
Current assignee: Individual
Priority date: 1986-01-14
Filing date: 1987-01-13
Publication date: 1988-01-27
Also published as: WO1987004213A1; FR2592911A1; FR2592911B1

Abstract

La présente invention est du domaine de la serrurerie et elle a plus précisément pour objet un verrou électrique. Selon l'invention un verrou électrique motorisé comportant essentiellement un pêne, un boîtier ou autre bâti, un moteur électrique, une vis coopérant avec un alésage taraudé pour manoeuvrer le pêne en translation lorsque le moteur tourne, et des moyens de commande de l'arrêt et de la mise en marche du moteur, est principalement caractérisé en ce que le bâti comprend un corps monobloc (1) comportant intérieurement deux alésages cylindriques coaxiaux (5, 6) en prolongement l'un de l'autre, l'un (5) servant au logement du moteur (3) lui-même à cage cylindrique, l'autre (26) servant au logement du pêne (2) lui-même cylindrique, par des moyens de calage en rotation du moteur et du pêne, par des moyens de calage du moteur en translation, par une vis solidaire de l'arbre moteur et le prolongeant, ladite vis (7) étant engagée dans un alésage taraudé axial (8) du pêne; d'où il résulte que lors de la rotation du moteur, le pêne est déplacé et guidé en translation dans son alésage du corps monobloc, d'où il résulte aussi que l'ensemble des pièces grâce au corps monobloc est d'une très grande robustesse. Application à la sûreté vis à vis de l'effraction.The present invention is in the field of locksmithing and it relates more specifically to an electric lock. According to the invention a motorized electric lock essentially comprising a bolt, a housing or other frame, an electric motor, a screw cooperating with a tapped bore for operating the bolt in translation when the engine is running, and means for controlling the stopping and when the engine is started, is mainly characterized in that the frame comprises a monobloc body (1) internally comprising two coaxial cylindrical bores (5, 6) in extension of one another, one (5 ) serving to house the engine (3) itself with a cylindrical cage, the other (26) serving for housing the bolt (2) which is itself cylindrical, by means of setting in rotation of the engine and the bolt, by means for stalling the motor in translation, by a screw integral with the motor shaft and extending it, said screw (7) being engaged in an axial threaded bore (8) of the bolt; where it follows that during the rotation of the engine, the bolt is moved and guided in translation in its bore of the one-piece body, where it also results that all of the parts thanks to the one-piece body is of a very large robustness. Application to security against burglary.

Description

MOTORIZED ELECTRIC ERROR "

The present invention is in the field of locksmithing and it relates more specifically to an electric lock.

Known in particular by 5 patents FR 2,509-495, FR 2,394,828, US 3,900,841, US 4-198,625, GB 2,012,092 and GB I,506,387 electrically motorized locks and in particular such a lock comprising essentially a bolt, a box or other fixed frame, an electric motor, a screw cooperating with a tapped bore 0 for operating the bolt in translation when the engine is running, and means for controlling the stopping and starting of the engine. These locks of the prior art generally present a drawback of a certain complexity which makes their use subject to breakdown; some of them are also relatively fragile, which is a major drawback for a security lock.

The object of the present invention is to provide a motorized lock which is both very simple and very robust. 0 According to the present invention an electrically powered lock of the type defined above is mainly characterized in that the fixed frame comprises a mohobloc body internally comprising two coaxial cylindrical bores in extension of one another, one

25 serving to accommodate the engine itself with a cylindrical cage, the other serving for housing the bolt itself cylindrical, by means of setting in rotation of the engine and the bolt, by means of setting the engine in translation, by a screw integral with the motor shaft and extending it, said 0 screw being engaged in an axial threaded bore of the bolt; it follows from this arrangement that all of the moving parts, that is to say essentially the motor, the means for translating and transforming the rotation of the motor into translation of the bolt and the bolt itself are housed in

- - the solid monobloc body, which ensures a very high robustness to the whole.

According to a particular form and preferred embodiment, the motor housing bore is of a diameter slightly greater than that of the bolt, a shoulder connecting the two bores, while a res¬ lot is disposed in the motor housing bore and takes pressing against the shoulder and against the motor cage to tend to eject the motor out of its bore and that a removable pin is placed across the motor housing bore to prevent the ejection of the latter, the shoulder and the pin constituting said means for stalling in translation of the engine; it follows from these latter provisions that in case of * removal of the pin, the entire motor of the screw, and of the bolt is ejected, from which, it ultimately results in rapid unlocking, emergency, of the lock. Preferably said moto¬ risé lock is provided with a microswitch whose probe is resting on the pin when the latter prohibits the ejection of the motor; this probe position corresponds to an open (inactive) position of the microswitch contact; the contact can close an alarm circuit: if the pin is removed, the alarm is activated.

According to another preferred arrangement, the bolt housing bore comprises an elongated slot through which passes a key integral with the bolt, the slot and key constituting the means for immobilizing the rotating bolt, and further constituting means limiting its translation.

Advantageously, the means for stalling the motor in rotation consist of a plate fixed to the motor cage and projecting slightly relative to the cylindrical surface of the latter, and by a groove formed in the internal wall of the bore of the housing of the housing. motor, the plate being engaged in said groove; note that the plate could be replaced by any equivalent member projecting from the motor cage.

Advantageously still, half so-called stroke limiters are arranged in the vicinity of the ends of said lumen, their feeler being placed on the path of the key, said microrup¬ tors controlling the stopping of the engine and therefore of the translation of the bolt.

According to a particular embodiment, the bolt is a hollow cylinder plugged at each of its ends, one of the end plugs comprising said axial threaded bore. According to another advantageous arrangement, said one-piece body with internal bores comes from a cylinder of which a part of the wall has a planed ebb along its length in order to present a flat surface known as a seat, of which another part is of substantially length. lower than that of the bolt bore was also planed in plan to serve as a seat for the microswitches of stroke limitation; always according to this avanta¬ gous shape, said planar parts are parallel to each other and together perpendicular to the bores for the passage of the fixing screw of said one-piece body.

The present invention will be better understood and details will be apparent from the description which will be given of a preferred embodiment in relation to the single sheet appended, in which:

- Fig.l is a perspective illustration of a lock of the invention in a part of its case, and

- Fig.2 is a section along the plane AA of the previous figure.

In fig.l and / or 2, a lock of the invention consists essentially of a body 1 containing, a bolt 2 and a motor 3, arranged inside a housing shown in the figure without its cover .

1 The body has internally two co-axial cylindrical bores 5 and 6. The bolt and the motor shaft are connected by a threaded rod or screw 7, pinned on the shaft engaged in a threaded bore 8 of one end of the bolt. A key 9 secured to the bolt moves with it in a slot 11 elongated from the lock body; this key allows the translation of the bolt along the common axis 12, and prohibits rotation. A plate 13 fixed to the front flanges of the motor cage protrudes relative to the cylindrical surface of the latter and enters a longitudinal groove 14 of the bore 5- The key 9 and light 11 and the plate

10 13 and groove 14 constitute means for setting in rotation the motor and the bolt, while the shoulder 17, the spring 18 and the pin 19 constitute means for setting the engine in translation; thanks to all of the aforementioned means the rotation of the motor induces the translation

1.5 "from the bolt.

The bore 5 has a diameter greater than the bore 6 and a shoulder 17 connects the two bores. On this shoulder 17 is supported a spring 18 tending to eject the engine out of its bore; a

20 removable pin 19 disposed at the rear of the engine across the bore 5 prohibits this ejection; 1 epaule¬ ment and the pin stops the motor in translation.

The pin is in connection with safety means for in case of fire for example

25 be removed which will have the effect of releasing the engine under the action of the spring and driving the bolt in the open position of the lock. A microswitch 20 has its feeler resting on the pin 19 and detects the withdrawal of the latter to activate an alarm.

30 Microswitches 23, 24, called stroke limitation, are arranged at the ends of the light 11 on the path of the key 9: their function is to stop the motor when the key meets their feeler, which limits the stroke deadbolt in its

35 extreme positions for closing and opening the lock.

The figure shows by cubes 25, 26, 27 in dotted lines different organs electronic or electrical necessary for the operation of the lock, these members being arranged inside the housing 4-

It should be noted that the monobloc body comes from a metal cylinder of which a part of the wall has been milled or planed over its entire length to form a flat surface 27 called seat while another part of the cylinder has been planed or milled in plan to serve as a seat 28 for the microswitch 23 and 24; it will be noted that if in the case in point, these two flat surfaces are parallel and opposite to each other, which allows the passage of screws 29 for fixing the body 1 to the housing 4, relative to the axis 12 of the assembly, they could also be arranged at 90 ° relative to this axis; in the latter case, the lumen 11, key 9 and microswitches 23 and 24 would be arranged on the side of the body 1, the latter having the position occupied in fig.l.

Although a particular embodiment of a lock according to the present invention has been described and shown, it should be understood that the scope of the latter is not limited to this form but that it extends to any lock comprising the general characteristics mentioned above.

Claims

1.- Motorized electric lock essentially comprising a bolt, a box or other fixed frame, an electric motor that a screw cooperating with a tapped bore for operating the bolt in translation when the engine is running, and means for controlling the stopping and starting the engine, characterized: in that the fixed frame comprises a one-piece body (l) internally comprising two coaxial cylindrical bores (5,6) in extension of one another, one (5 ) serving to house the engine (3) itself with a cylindrical cage, the other (26) serving for housing the bolt (2) which is itself cylindrical, by means of setting in rotation of the engine and the bolt, by means for stalling the motor in translation, by a screw integral with the motor shaft and extending it, said screw (7) being engaged in an axial threaded bore (8) of the bolt, whence it results that during the rotation of the motor, the bolt is moved and guided in translation in its bore of the horn ps monobloc, from which it also follows that all of the parts thanks to the monobloc body are very robust;

2. A lock according to claim 1, characterized: in that the bore (5) of the motor housing is of a diameter slightly greater than that (6) of the bolt, a shoulder (17) connecting the two bores , in that a spring (18) is disposed in the housing bore of the engine, bears against the shoulder and against the cage of the engine in order to tend to eject the engine out of its bore, in that a removable pin (19) is arranged across the engine housing bore to prevent the ejection of the latter, the shoulder and the pin constituting said means 5 for wedging the engine in translation, where it follows that in case of removal of the pin, the entire motor of the screw, and the bolt is ejected, from which it ultimately results in rapid unlocking, emergency, of the lock;

l ^u 3-- Lock according to claim 2, characterized: in that a microswitch (20) closing an alarm circuit is active in the event of ejection of the motor;

4 "- Lock according to claim 3, characterized: 5 in that said microswitch

(20) has its feeler resting on the pin (19) to detect the withdrawal of the latter and close the alarm circuit;

5. A lock according to claim 2, characterized: 0 in that said bore (6) for housing the bolt comprises an elongated slot (it) through which a key (9) secured to the bolt (2) passes, the slots and key constituting the means for immobilizing the rotating bolt, and further constituting means for limiting its translation;

6. A lock according to claim 1, characterized: in that the means for stalling the motor in rotation consist of a plate (13) fixed to the motor cage and slightly protruding 0 relative to the cylindrical surface of the latter , and by a groove (14) formed in the internal wall of the bore (5) of the motor housing, the plate being engaged in said groove;

7. A lock according to claim 5, characterized: in that ^" microswitches (23,24) called stroke limitation, are arranged in the vicinity of the ends of said lumen, their feeler being placed on the path of the key, said microswitches controlling the stopping of the engine and therefore of the translation of the bolt;

8. Lock according to any one of the preceding claims, characterized in that the bolt is a hollow cylin¬ dre plugged at each of its ends, one of the end plugs comprising said axial threaded bore;

9. A lock according to claim 7, characterized: in that said one-piece body with internal bores comes from a cylinder of which a part of the wall has been planed along its length to present a flat surface (27) called seat , of which another part, of a length substantially less than that of the bolt bore, has also been planed in plan to serve as a seat (28) for the microswitches for limiting the stroke (23,24);

10. -Lock according to claim 9, characterized: in that said flat parts are parallel to each other and together perpen¬ dicular to the screw passage bores (29) for fixing said one-piece body.