EP2597230B1 - Cylinder for a security lock - Google Patents

Description

The invention relates to a safety lock cylinder.

In a safety lock, it is customary to provide a cylinder consisting of a stator, an outer rotor and an inner rotor. The stator generally has a median notch for the passage of the bit.

Between the outer rotor and the inner rotor is arranged a bit driver for controlling the locking or unlocking of the lock both from the outside of the door, by the outer rotor, and from the inside, by the inner rotor.

Such a safety cylinder is described in the document DE 1194287 . This structure has a point of weakness at the notch in case of attempted burglary by rupture of the cylinder by the so-called method of whipping (snapping).

An object of the invention is to provide a safety lock cylinder which avoids this point of weakness at the notch and allows to achieve a so-called unbreakable cylinder by whipping.

The invention relates to a safety lock cylinder, comprising a stator with notch for the passage of the bit, an outer rotor, an inner rotor and a driver, characterized in that : the outer rotor extends beyond the notch, the inner rotor extends below the notch, and between the driver and the bit is disposed a driving cup of the bit adapted to transmit to the bit the rotational movements transmitted by the rotors to the coach .

Advantageously, the outer rotor is held in longitudinal position relative to the stator by means of a stirrup placed on the inside of the stator.

Preferably, the driving cup of the blade has a peripheral groove for receiving said stirrup.

Advantageously, the cup has an annular rib, and the outer rotor carries spring pins whose cooperation with said annular rib maintains the longitudinal position of the outer rotor and the cup.

Advantageously, the cylinder comprises an extension ensuring the mechanical connection by support between the trainer and a key introduced into the outer rotor.

Preferably, the stator has, on the outside, two oblique faces. Advantageously, the stator comprises, inside, at least one false stator whose assembly to the stator is provided by a pin.

Advantageously, the cylinder is in two parts joined by a base, each part consisting of a rotor and a half-stator.

Preferably, each half-stator comprises a tube adapted to receive a finger, the set of tubes and the finger constituting said base.

Advantageously, each of the two parts is housed in a stainless steel cover.

Advantageously, the driving cup bit is bell-shaped cylindrical skirt, the free edge of the cylindrical skirt having teeth adapted to cooperate with teeth of the bit for driving in rotation of the bit by the cup.

Preferably, the bottom of the driving cup of the blade has a shape of light corresponding to that of the coach, for driving in rotation of the cup by the trainer.

Advantageously, the outer rotor extends inside the bit and inside the cup to the bottom of the driving cup bit.

Advantageously, the inner rotor extends, outside the cup, to the bottom of the driving cup bit.

Preferably, the axis of the driving position of the bit, located in the mean plane of the bottom of the cup is offset, relative to the notch, in the inner portion of the stator.

Advantageously, the trainer has two different depths of impression, intended to receive the end of a spring-loaded safety pin.

Advantageously, the pin comprises a washer of the same thickness as the cylindrical skirt of the blade driving cup, and a head adapted to be applied in the imprints of the driver.

Preferably, the head of the pin is applied in the shallow cavity and ensures the securing of the outer rotor and the driving cup bit.

Advantageously, the head of the pin is applied in the deepest imprint and the washer is in an orifice of the skirt of the cup and follows the movement of the cup.

Advantageously, the bit and the cup are made in one piece.

• la fig. 1 est une vue de face d'un cylindre de serrure de sûreté selon un premier mode de réalisation de l'invention ;
• la fig. 2 est une vue en perspective éclatée du cylindre de la fig. 1 ;
• la fig. 3 est une vue en perspective du panneton de la fig. 2 ;
• la fig. 4 est une vue de droite du panneton de la fig. 3 ;
• la fig. 5 est une vue en coupe selon la ligne BB de la fig. 4;
• la fig. 6 est une vue de droite du cylindre de la fig. 1 ;
• la fig. 7 est une vue agrandie, en coupe selon la ligne AA de la fig. 6 ;
• la fig. 8 est une vue en coupe d'un panneton et de sa coupelle, réalisés en une seule pièce ;
• la fig. 9 est une vue en perspective d'un entraîneur adapté au cylindre de la fig.1,
• la fig. 10 est une vue en perspective éclatée d'un cylindre de serrure de sûreté selon un deuxième mode de réalisation de l'invention ;
• la fig. 11 est une vue en perspective d'un cylindre selon un troisième mode de réalisation ;
• la fig. 12 est une vue en perspective éclatée d'un cylindre selon un quatrième mode de réalisation ;
• la fig. 13 est une vue en perspective éclatée d'un cylindre de serrure de sûreté selon un cinquième mode de réalisation de l'invention.

The invention will be better understood, and other objects, details, features and advantages thereof will appear more clearly in the following description of a particular embodiment of the invention, given solely for illustrative purposes and not limiting, with reference to the accompanying drawings. On these drawings:

• the Fig. 1 is a front view of a safety lock cylinder according to a first embodiment of the invention;
• the Fig. 2 is an exploded perspective view of the cylinder of the Fig. 1 ;
• the Fig. 3 is a perspective view of the bit of the Fig. 2 ;
• the Fig. 4 is a right view of the bit of the Fig. 3 ;
• the Fig. 5 is a sectional view along line BB of the Fig. 4 ;
• the Fig. 6 is a right view of the cylinder of the Fig. 1 ;
• the Fig. 7 is an enlarged view, in section along the line AA of the Fig. 6 ;
• the Fig. 8 is a sectional view of a bit and its cup, made in one piece;
• the Fig. 9 is a perspective view of a trainer adapted to the cylinder of the fig.1 ,
• the Fig. 10 is an exploded perspective view of a safety lock cylinder according to a second embodiment of the invention;
• the Fig. 11 is a perspective view of a cylinder according to a third embodiment;
• the Fig. 12 is an exploded perspective view of a cylinder according to a fourth embodiment;
• the Fig. 13 is an exploded perspective view of a safety lock cylinder according to a fifth embodiment of the invention.

In the remainder of the description, the lock being supposed to be fixed on a door separating the interior of a room from the outside, the interior adjective denotes a part situated towards the interior of the room and the adjective outside denotes a part located towards the outside of the room.

On the fig.1 to fig.9 , the cylinder comprises a stator 1, an outer rotor 4, an inner rotor 6, a bit 2, a bit 3 driving the bit 2, a driver 5, and a notch 8 for the passage of the bit 2.

The bit 2 has a cylindrical armature which carries on its outer surface the finger 2b of the bit, and which has on its inner surface 2a teeth 2c of the inner side of the cylinder.

The driving cup 3 of the bit 2 is in the form of a cylindrical bell. Its bottom 3f has a shape of light 3b corresponding to that of the coach 5. Its cylindrical skirt has an outer surface 3e sliding in the inner surface 2a of the bit, and on its free edge, teeth 3c cooperating with the teeth 2c of the bit 2, so that the bit 2 and its drive cup 3 are integral in rotation. The cup 3 is introduced into the bit 2 by its free edge, on the inside of the bit 2, and it enters the bit 2 only a length corresponding to its teeth 3c. The cup 3 has, in its cylindrical skirt, a 3d orifice for the passage of a safety pin 7.

The outer rotor 4 has a length equal to about 1.5 times the length of the outer portion of the stator 1. This length is such that the outer rotor 4 enters the inner portion of the stator 1, beyond the notch 8. At the outer limit of the notch 8, the outer rotor 4 has a peripheral groove 4d intended to cooperate with a first stirrup 9 for maintaining the outer rotor 4 in longitudinal position.

Beyond the groove 4d, the outer surface 4a of the outer rotor 4 slides in the inner surface 2a of the bit 2.

The end portion of the outer rotor 4, opposite its outer face receiving the key, has a smaller diameter to enter the drive cup 3 of the bit 2. The outer surface 4b of the outer rotor 4 slides in the inner surface 3a of the cup 3. In its smaller diameter portion, the outer rotor 4 has an orifice 4c for the passage of the safety pin 7. In its part which extends beyond the groove 4d, that is ie beyond the keyway, the outer rotor 4 has in its axial region, a recess 4e for receiving the driver 5.

The inner rotor 6 has a length substantially equal to 0.5 times the length of the inner portion of the stator 1. In the vicinity of its end opposite its face receiving the key, the inner rotor 6 has on the one hand an inner recess 6a intended to receive the end 5-1 of the driver 5, on the other hand a peripheral groove 6b intended to cooperate with a second stirrup 10 for maintaining the inner rotor 6 in longitudinal position.

The coach 5 is of conventional type, elongated and flattened, with a central longitudinal region bulged to accommodate a rod 11 for holding the two parts of the coach: the outer portion 5-2 housed in the outer rotor 4 and fit to cooperate with the outer rotor 4 in the event of locking or unlocking the lock; and the inner part 5-1, adapted to cooperate with the inner rotor 6.

The two parts 5-1 and 5-2 are able to pivot on the rod 11 independently of one another, and to move longitudinally together under the action of a key.

The outer portion 5-2 of the driver has on one of its faces two cavities 5a and 5b, of different depth, for receiving the end of the safety pin 7.

The footprint 5a is located near the inner part 5-1 of the coach, and it is the deepest of the two footprints. The footprint 5b is located next to the footprint 5a, the outer side with respect to the footprint 5a, and it is the shallower of the two footprints.

The pin 7 is located on the inner side of the cylinder; it is housed in the stator 1, next to the notch 8; and it is biased by spring towards the trainer 5.

The pin 7 is in three parts: a body 7c biased by the spring and intended to remain in the stator 1, a washer 7b of the same thickness as the skirt of the cup 3 driving the bit 2, and a head 7a adapted to apply in fingerprints 5a and 5b.

When the driver 5 is biased inward by the introduction of a key in the outer rotor 4, the inner end of the outer portion 5-2 of the driver 5 engages the light 3b of the driving cup 3 of the blade 2, and the inner part 5-1 of the driver is housed in the inner rotor 6.

The head 7a of the pin 7 is applied in the shallow cavity 5b and the washer 7b is in the stator 1.

The head 7a of the pin 7 provides for security securing the outer rotor 4 and the driving cup 3 of the bit 2. When operating the key for a locking or unlocking of the lock from the outside the outer rotor 4 rotates, and transmits its movement to the driver 5 and to the head 7a of the pin 7. The driving cup 3 of the bit 2 is then urged to rotate on the one hand by the outer portion 5- 2 of the driver cooperating with the light 3b of the bottom 3f of the cup 3, on the other hand by the head 7a of the pin 7 cooperating with the orifice 3d of the skirt of the cup 3. The teeth 3c of the cup 3 cooperate with the teeth 2c of the bit to ensure the driving of the bit 2.

When the key is inserted from the inside, the driver 5 is pushed outward in the position shown Fig. 7 , the inner part 5-1 of the trainer being engaged in the light 3b of the cup 3.

The head 7a of the pin 7 is applied in the deepest recess 5a and is housed in the outer rotor 4. The washer 7b is located in the orifice 3d of the skirt of the cup 3.

The inner rotor 6 transmits its movement to the inner part 5-1 of the coach 5. The driving cup 3 of the bit 2 is then urged in rotation by the inner part 5-1 of the driver 5 cooperating with the light 3b of the bottom 3f of the cup 3, without the pin 7 opposes this rotation since the washer 7b follows the movement of the cup 3. The cup 3 drives the bit 2 for locking or unlocking the lock.

On the Fig. 7 are represented on the one hand the axis 12 of the lock and the cylinder, on the other hand the axis 13 of the driving position of the bit, located in the mean plane of the bottom 3f of the cup 3, and which is clearly offset from the notch 8, and is in the inner part of the stator 1.

This offset allows the cylinder to resist whipping and to be unbreakable.

On the Fig. 8 is shown an embodiment in one piece of the bit 2 and the cup. This monobloc bit 2 has a bearing face 3g.

On the Fig. 9 is represented an embodiment of the coach 5, adapted to the case of symmetrical cylinder in length, the driver then having on its inner portion 5-1, a shoulder defining a bearing surface 5-1a. This bearing face 5-1a is intended to abut on the bearing face 3g of the bit 2 or the cup 3. In fact, in the general case, the introduction of the key is carried out until the key stop bears on the rotor head. The notches of the key are then in place in front of the safety pins, which allows rotation of the rotor.

When the cylinder on the inner side, allows the assembly of 5 pins for example, as much as on the outer side (case of an asymmetrical cylinder), the key reaches the stop on the rotor head to allow rotation of the rotor. But in the case where the cylinder, on the inner side, has only 2 pins for example (case of symmetrical cylinder in length, shown in the drawings), the key stop can no longer be done with the rotor head. In this case, it is the coach 5, by its bearing surface 5-1 a, which abuts on the bearing face 3g of the bit 3.

On the Fig. 10 , the first stirrup 9, for maintaining the outer rotor 4 in the longitudinal position in the stator 1, is placed beyond the bit 2, on the inner side of the stator 1.

The driving cup 3 of the bit 2 is fixed to the bit 2 by means of a spring pin 14, inserted into a blind hole 15 of the bit and cooperating with a blind hole disposed on the outer surface of the cup 3. The cup 3 also has a peripheral groove 4d on its outer surface, near its bottom, for receiving the first stirrup 9. On its inner surface, the cup 3 has an annular rib. The smaller diameter portion of the outer rotor 4 has on its outer surface 4b two non-through holes for receiving pins 16 biased by spring. The cooperation between the annular rib of the cup 3 and the pins 16 carried by the outer rotor 4, ensures the maintenance in longitudinal relative position of the outer rotor 4 and the cup 3. The cooperation between the first stirrup 9 and the peripheral groove 4d of the cup ensures the longitudinal position, relative to the stator 1, of the outer rotor 4-cup 3 - bit 2 assembly. The connection between the elements of the assembly is ensured by pins which are advantageously made of stainless steel , as well as the cup 3.

The outer portion of the stator 1, which no longer has a groove for receiving a retaining clip in position of the outer rotor, is stronger. To further increase the mechanical strength of the cylinder, the stator 1 is advantageously made of stainless steel.

The coach consists of two elements. On the one hand, the trainer proper in two parts 5-1, 5-2, assembled, on the other hand, an extension 17, which provides the mechanical connection by pressing between the key introduced into the outer rotor 4 and the coach proper.

The inner rotor 6 is similar to that of the Fig. 2 .

In the exemplary embodiment of the Fig. 11 , the stator 1 is provided, on the outside, with two oblique faces 18 causing the sliding of the clamp during the whipping tests.

In the exemplary embodiment of the fig.12 the stator is constituted in two parts: a stator section 1 of conventional type, and, inside, at least one false stator 19.

This arrangement allows the pre-assembly of the pins in the false stator 19 before the installation of the false stator 19 in the stator 1.

The assembly of the false stator 19 and the stator 1 is ensured by a pin 20.

In the embodiment of the Fig. 13 , the cylinder is in two parts joined by a base.

Each of the two parts consists of a rotor and a half-stator, for example the outer rotor 4 and the outer half-stator 21. Each half-stator comprises at its lower part a tube 22, 23, adapted to receive a finger 24. The assembly of the tubes 22, 23 and the finger 24 constitutes a base connecting the two half-stators.

The bit 2 and the bit 3 driving the bit are advantageously made in one piece, assembled to the outer rotor 4 by means of pins 16 spring, as in the case of the Fig. 10 . Each of the two parts is advantageously housed in a cover 25, 26 in stainless steel. The assembly of the cylinder is ensured by means of two pins 27. The stainless steel construction of the two covers 25, 26 causes the sliding of the clamp in the whipping tests.

The cylinders thus designed can be equipped with notched keys, or reversible keys with holes arranged on a row of pins or in a multidirectional arrangement. The dimensions of the various constituent parts of the cylinders correspond to the usual lengths of standard type rolls.

The invention has been described without precision on the type of key, as it applies to a notched or reversible key, in vertical or horizontal position.

The invention has been described in the case of a stator in one part, with a notch for the passage of the bit, and in the case of a stator in two parts connected by a base.

Claims (20)

1. Cylinder for a security lock, comprising a stator (1) with notch (8) for the passage of the key bit (2), an outer rotor (4), an inner rotor (6) and a driver (5), characterized in that: the outer rotor (4) extends beyond the notch (8), the inner rotor (6) extends on only one side of the notch (8), and between the driver (5) and the key bit (2), there is arranged a collar (3) for driving the key bit (2) suitable for transmitting to the key bit (2) the rotational movements transmitted by the rotors (4, 6) to the driver (5).
2. Cylinder according to Claim 1, characterized in that the outer rotor (4) is maintained in longitudinal position relative to the stator (1) by means of a stirrup (9) placed on the internal side of the stator (1).
3. Cylinder according to Claim 2, characterized in that the collar (3) for driving the key bit (2) has a peripheral groove (4d) for receiving said stirrup (9).
4. Cylinder according to Claim 2, characterized in that the collar (3) has an annular ridge, and the outer rotor (4) bears pins (16) with spring whose cooperation with said annular ridge ensures that the outer rotor (4) and the collar (3) are maintained in longitudinal position.
5. Cylinder according to Claim 2, characterized in that the cylinder comprises an extension piece (17) ensuring the mechanical link by bearing between the driver (5) and a key introduced into the outer rotor (4).
6. Cylinder according to Claim 1, characterized in that the stator (1) has, on its external side, two oblique flats (18).
7. Cylinder according to Claim 1, characterized in that the stator (1) comprises, inside, at least one false stator (19) whose assembly with the stator (1) is assured by a pin (20).
8. Cylinder according to Claim 1, characterized in that the cylinder is in two parts joined by a base, each part consisting of a rotor and a half-stator.
9. Cylinder according to Claim 8, characterized in that each half-stator comprises a tube (22, 23) suitable for receiving a finger (24), the assembly of the tubes (22, 23) and of the finger (24) constituting said base.
10. Cylinder according to Claim 8, characterized in that each of the two parts is housed in a cover piece (25, 26) made of stainless steel.
11. Cylinder according to Claim 1, characterized in that the collar (3) for driving the key bit (2) is in the form of a bell with cylindrical skirt, the free edge of the cylindrical skirt having teeth (3c) suitable for co-operating with teeth (2c) of the key bit (2) for the rotational driving of the key bit (2) by the collar (3).
12. Cylinder according to Claim 11, characterized in that the bottom (3f) of the collar (3) for driving the key bit (2) has an opening (3b) of a form corresponding to that of the driver (5), for the rotational driving of the collar (3) by the driver (5).
13. Cylinder according to Claim 11, characterized in that the outer rotor (4) extends inside the key bit (2) and inside the collar (3) to the bottom (3f) of the collar (3) for driving the key bit (2).
14. Cylinder according to Claim 11, characterized in that the inner rotor (6) extends, outside the collar (3), to the bottom (3f) of the collar (3) for driving the key bit (2).
15. Cylinder according to Claim 1, characterized in that the axis (13) of the driving position of the key bit (2), situated in the medium plane of the bottom (3f) of the collar (3) is offset, relative to the notch (8), in the internal part of the stator (1).
16. Cylinder according to Claim 1, characterized in that the driver (5) has two indentations (5a, 5b) of different depth intended to receive the end of a spring-stressed security pin (7).
17. Cylinder according to Claim 16, characterized in that the pin (7) comprises a washer (7b) of the same thickness as the cylindrical skirt of the collar (3) for driving the key bit (2), and a head (7a) suitable for being applied into the indentations (5a, 5b) of the driver.
18. Cylinder according to Claim 17, characterized in that the head (7a) of the pin (7) is applied into the shallower indentation (5b) and ensures the securing of the outer rotor (4) and of the collar (3) for driving the key bit (2).
19. Cylinder according to Claim 17, characterized in that the head (7a) of the pin (7) is applied into the deeper indentation (5a) and the washer (7b) is located in an orifice (3d) of the skirt of the collar (3) and follows the movement of the collar (3).
20. Cylinder according to Claim 1, characterized in that the key bit (2) and the collar (3) are made of a single piece.

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