RU2425203C2 - Lock with safety device - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: lock with a safety device comprises a stiff jacket, a locking bolt element, a cylindrical lock, an annular geared wheel and a mechanical transmission. The locking bolt element is installed with the possibility of sliding in the jacket between opening position and closing position. The cylindrical lock comprises a stator fixed on the jacket, and a rotor to rotate a control part that extends in radial direction. The annular geared wheel is installed with the possibility of rotation in the jacket coaxially relative to the cylinder rotor and has a radial slot. The slot is engaged with a radial control part of the cylindrical lock so that it is rotated with the radial control part, when the cylindrical lock is actuated by means of a key. The mechanical transmission comprises at least one geared wheel engaged with an annular geared wheel to convert the motion of the annular geared wheel rotation into reciprocal motion of the locking bolt element. In any point along the mechanical transmission there is a link between the slave part and the master part, which makes it possible for the specified parts to relative move in a restricted manner. The mechanical transmission includes a part arranged with the possibility of rotation in the jacket and carrying two diametrically opposite axial pins designed for engagement of the part, which is shaped as a movable geared engagement of the specified element in the locking bolt. The rotary part is formed with a disc with a protruding central section on its face surface intended for engagement in the central hole of the geared wheel. The protruding section of the disc is shaped with a round section limited at its angular extension with additional surfaces. The central hole of the geared wheel is shaped with a round section limited at its angular extension with additional surfaces.

EFFECT: reliability and accuracy, convenience in use.

6 cl, 10 dwg

Description

The present invention relates to the field of lock devices with a fuse type, comprising:

- hard cover;

- an element of the locking bolt mounted with the possibility of sliding in the casing between the opening position and the closing position;

- a cylindrical lock containing a stator fixed on the casing and a rotor for bringing into rotation the radial direction of the control part;

- an annular gear wheel, mounted with the possibility of coaxial rotation in the casing relative to the cylinder rotor, and has a radial slot engaged by the radial control part of the cylindrical lock so that it rotates the radial control part when the cylindrical lock is actuated by means of a key; and

- a mechanical transmission comprising at least one gear engaged with the ring gear to convert the rotation movement of the ring gear into the translational movement of the locking bolt element.

A device of the aforementioned type, for example, is disclosed in document No. FR 2707322.

A typical hacking technique in the case of locks of this type consists in tearing a cylindrical lock from this device. The fixation of the cylindrical lock inside the device is due only to the pin that is inserted into the body of the cylindrical lock. The resistance of the pin is limited due to the size of the pin, which is difficult to substantially increase, because the cylindrical locks have standardized dimensions, and, above all, due to the fact that the pin is mainly subjected to shear stress.

In more modern devices, in order to achieve greater reliability of blocking the cylindrical lock inside the case of the device, a method is adopted in which the lock is not actuated by the key and is in the stop in the fully open or completely closed state to realize the possibility when the radial control part of the cylindrical lock protrudes in the transverse from the case of the cylindrical lock, the formation of locking against removing the case from this casing.

The problem that arises as a result of such an arrangement of the radial control part, which is in the lock stop state, either completely open or completely closed, is that when the cylindrical lock is installed inside the casing, the radial control part may protrude laterally from the cylindrical body the lock doesn’t matter either on one side or on the other, pulling together with it the ring gear with which it engages. This means that in accordance with where the radial control part protrudes, the mechanical transmission that follows the ring gear and actuates the locking bolt element can be in an advanced forward or retarded position during the operating stroke of the actuation. Moreover, the lock does not have precise and unambiguous regulation, and its action becomes less smooth and more inconvenient for the consumer, who, in accordance with his own sensitivity, must evaluate whether the lock device is fully open or completely closed.

The present invention provides a safety lock that eliminates the disadvantages of prior art devices.

To achieve the aforementioned task, the object of the invention is a safety lock according to claim 1.

Due to these characteristics, in particular due to the possibility of limited relative movement between the leading part and the driven part at any point along the mechanical transmission between the cylindrical lock and the locking bolt, the movement of the leading part is designed so that the driven part is transmitted only after the said parts reach the relative position the end of the stroke. Thus, the advantage is obtained that the actuation of the key causes the beginning of the displacement of the locking bolt for the same inclined position of the key, regardless of whether the cylinder lock was installed with a radial control element that protrudes from the body of the cylinder lock with one side or the other. Therefore, the operation of the device is always accurate and reliable, regardless of how the cylinder lock was installed.

Additional characteristics and advantages are given in the following description with reference to the accompanying drawings, which should be considered solely as a non-limiting example and which show:

- figure 1 is a perspective view of a lock device with a fuse in accordance with the invention;

- figure 2 is a perspective view of an enlarged part of the lock device with a fuse, illustrated in figure 1;

- figure 3 is part of figure 2, without some of its components for a clearer view;

- figa is a perspective view of two components of the lock device with a fuse;

- fig. 4b is a perspective view of the components of fig. 4a assembled on top of each other;

- figure 5 is a part of figure 2, in which the elements are in an intermediate position of the stroke of the actuation of the locking device with a fuse;

- 6 is a view in section of a lock device with a fuse in the first state of its opening, where the radial control element occupies a position shifted to the right;

- Fig.7 is a view in section of a lock device with a fuse in the opening state, where the radial control element occupies a central position;

- Fig. 8 is a sectional view of a lock device with a fuse in the opening state, where the radial control element occupies a position shifted to the left; and

- Fig.9 is a sectional view of a lock device with a fuse, where the components of the chain of gears occupy an intermediate position of the working stroke of the actuation of the lock device with a fuse.

1 and 2, reference numeral 1 denotes a safety lock that includes a housing 2, within which the locking bolt element 3 slides between the opening position and the closing position. The locking bolt element 3 is formed by locking bolts, such as cylindrical rods 3a, mounted on the plate 3b. The plate 3b has guiding slots 5 and a slot having such a shape that defines gearing 6. The movement of the plate 3b is controlled by a mechanical gear 7. The aforementioned mechanical gear 7 consists of a disk 8 and a gear 9 (Figs. 4a, 4b). On the front surface of the disk 8, two axial pins 8a are fixed (not visible in FIGS. 4a, 4b, but shown in FIG. 3), intended for meshing with gearing 6 of the plate 3b (FIG. 3). In addition, the disk 8 has a protruding section 8b, designed to connect with the Central hole 9b of the gear 9 (Fig.4A). The portion 8b has a substantially circular shape with a flat side 8b ′. The hole 9b has a corresponding circle shape, interrupted by two flat sides 9b ′, which are set at angles relative to each other and define additional surfaces that interact with the surface 8b ′ to determine two end positions in relative rotation between the disk 8 and the gear 9. This arrangement is actually is such that the circular portion of the hole 9b has an angular elongation greater than the angular elongation of the portion 8b of the disk 8. This creates a backlash (in the sense of relative rotation ) Between the disk 8 and the gear 9, whose value is equal to the difference between the angular elongations.

The gear 9 engages with the ring gear 10, the supporting surface of which is made on the block 11, fixed on the casing 2 of the lock device 1 with a fuse. The ring gear 10 has a radial slot 10a having a width equal to the thickness of the lower part of the cylinder lock case (not visible in the drawings). An annular gear wheel 10 surrounds a cylindrical lock, which contains, in accordance with generally accepted technical method, a stator (not shown) fixed on the casing 2, and a rotor (also not shown), which can be actuated by a key (not shown) to drive details 12 into rotation, from which the radial control element protrudes, or “contour pen” 13.

A radial control element 13 is installed inside the slot 10a of the ring gear 10, and, as can be seen in FIG. 2, there is a play between the radial control part 13 and the side walls of the slot 10a equal to the difference between the width of the slot 10a and the width of the radial part 13.

When the cylindrical lock is actuated using a key, the radial element 13 rests on one of the walls of the ring gear 10 defining the slot 10a and pushes the latter into rotation.

The stator of the cylindrical lock is fixed inside the casing 2 by means of a pin 14, which is inserted laterally into the lower part of the cylinder lock case. This pin 14 carries a plate 15, which can slide inside the casing 2 between the engagement position and the release position of the pin 14 inside the cylinder lock housing. The plate 15 is controlled by a rod 16, accessible from the outside. Since the said locking of the cylindrical lock inside the lock device is not considered as sufficient for the safety purpose, in the device stop states, in the fully open or fully closed position, the radial control element 13 is mounted so that it protrudes in the transverse direction from the cylinder lock case. During the installation of the cylindrical lock inside the casing, the radial control element 13 is supported temporarily in the center, holding the rotary key relative to its neutral position, after which the key returns to the said neutral position, so that the element 13 protrudes in the transverse direction from the cylinder lock case. Mentioned protrusion can be located both on one or the other side of the housing, in accordance with whether the housing itself was inserted into the device, starting from one or the other of its ends.

Therefore, when the cylinder lock is installed in the casing, and the key returns, as mentioned above, to its neutral position, the element 13 performs a slight oscillation from the lock case (on the one hand or on the other, as mentioned, in accordance with the orientation of the case in the installed condition). Said small oscillation is transmitted to the ring gear 10, which then rotates either in the direction of actuation of the locking bolt or in the opposite direction. The same small rotation is transmitted, obviously, by the ring gear 10 to the gear wheel 9.

Note, for example, with reference to Fig. 8, that there it is assumed that the cylindrical lock was installed so that in the neutral position of the key, the element 13 projects to the left (as can be seen in the drawing) relative to its centered position. This means that when installing the cylindrical lock, the element 13 performs a slight oscillation in the clockwise direction (as seen in the drawing), pulling with it the ring gear 10 to the position shown in Fig. 8, in which the element 13 is in contact with the left side (again as shown in the drawing) of the slot 10a. In the case of actuating the closing of the lock using a key, the element 13 rotates in a counterclockwise direction, as shown in the drawing. Therefore, the element 13 will not draw the ring gear 10 into rotation until it comes into contact with the right side of the slot 10a. Starting from the aforementioned state and continuing to rotate the key, the element 13 will retract the ring gear 10 into rotation, which, in turn, will cause the corresponding rotation of the gear 9. However, the rotation of the gear 9 will not be transmitted immediately to the disk 8, which carries the pins 8a engaged with the gear 6 of the locking deadbolt until the additional surfaces 8b ′ and 9b ′ come into contact with each other. As soon as the rotation of the key reaches the position where the above-mentioned contact takes place, further rotation of the key will cause the locking bolt to shift.

If instead, the cylindrical lock is installed in such a way that the element 13 protrudes to the right (as shown in the drawings), as illustrated, for example, in FIG. 6, the small oscillation that the element 13 performs after being installed will first cause the initial rotation of the ring gear wheel 10 in a counterclockwise direction. The said rotation causes the corresponding rotation of the gear 9 in such a way that it brings into contact additional surfaces 8b ′, 9b ′. Starting from the aforementioned state, the rotation of the key will immediately cause the locking bolt to shift. As you can then notice whether the element 13 is installed protruding to the left (Fig. 8) or to the right (Fig. 6), the active movement of the locking deadbolt is always called up, starting from the same position of the actuation key.

The lock device is in abutment in safety states when the pins 8a of the disk 8 are constantly inside the recesses forming the teeth of the gear 6 of the plate 3b, that is, when they are aligned in the direction of movement of the locking bolt element 3. But the presence of play allows the disk 8 to rotate to a position in which one of the pins 8a is out of this position, thus performing a reversible working stroke of closing the lock device with a safety lock in the case where any axial pressure should have been exerted on the cylindrical rods 3a . As can be seen in Fig. 5, then a lever 17 is provided there, pushed by the elastic element 18 against the stop with a smoothed region 8c (Fig. 4a) of the side surface of the disk intended to interact with the additional surface of the lever 17, returning the disk 8 in the open and close state to the position in which the pins 8a are in a safe state.

As mentioned above, starting from the stop state when the device shown in Fig. 8 is fully opened, in which the radial element 13 protrudes to the left of the cylinder lock case 12, by means of the key, the radial element 13 rotates counterclockwise, setting the device in the closed state . There is a first idle in which the radial element 13 is brought to rest on the right wall of the radial slot 10a in the ring gear 10, and a second idle in which the radial element 13 pushes, along with this, the ring gear 10, which, in turn, drives the gear 9, which is freed from the disk 8 due to the presence of play in the connection between the last elements. At the end of the second idle, the radial element 13 reaches the position shown in FIG. As mentioned above, if the cylindrical lock 12 is installed so that the radial element 13 is already in the stop in the position shown in Fig.6, actuating the key will immediately cause the device to close without any initial idling.

In the state shown in FIG. 6, the additional surface 9b ′ of the central hole 9b of the gear 9 is in contact with the additional surface 8b ′ of the central portion 8b of the disk 8, and therefore, the counterclockwise rotation of the radial element 13 will cause the disk to rotate 8, and therefore, the movement of the pins 8a of the disk 8 inside the gear 6 of the plate 3b of the element 3 of the locking bolt, such as to transfer this element 3 of the locking bolt when translating to the floor closing.

Figure 9 shows a lock with a fuse, in which the chain of gears is in the intermediate position of the actuating stroke. It can be noted that the radial control part 13 acts like a tooth of the ring gear 10, and transmission in the chain of gears smoothly continues during the operation of the actuation.

The above is possible because the play between the side walls of the slot 10a and the radial control part 13 is such that it does not cause collisions with the teeth of the gear 9.

As is apparent from the foregoing description, the lock in accordance with the invention is characterized in that it is accurate, reliable and user-friendly, on the other hand, without leading to a particularly complex structure. In particular, in contrast to the known solutions, gear locks can be used in the lock according to the invention, all of which have their own teeth with devices and dimensions identical to each other. An additional advantageous characteristic of the preferred embodiment illustrated herein is that the mechanical transmission, which converts the rotation of the ring gear 10 to the movement of the locking bolt, comprises a single gear 9 and a pair of pins 8a interacting with the gear 6.

Of course, without prejudice to the principles of the invention, the details of the construction and embodiments can be widely changed with respect to what has been described and illustrated in this description by way of example only, without going beyond the scope of the present invention.

Claims (6)

1. The lock with a fuse containing
- hard cover (2),
- an element (3) of a locking deadbolt mounted with the possibility of sliding in the casing (2) between the opening position and the closing position,
- a cylindrical lock containing a stator fixed on the casing (2), and a rotor (12) for bringing into rotation the radial direction of the control part (13),
- an annular gear wheel (10) mounted rotatably in the casing (2) coaxially with respect to the cylinder rotor and having a radial slot (10a), the slot being engaged with the radial control part (13) of the cylindrical lock in such a way that the radial control part is rotated (13) when the cylinder lock is actuated by a key, and
- a mechanical transmission (7), including at least one gear wheel (9) engaged with the ring gear (10) to convert the rotation movement of the ring gear (10) into the translational movement of the locking bolt element (3),
characterized in that at any point along the mechanical transmission (7), a connection is provided between the driven part and the driving part, which provides the mentioned parts with the possibility of limited relative movement, moreover, the mechanical transmission (7) includes a part (8), made with the possibility of rotation in casing (2) and bearing two diametrically opposite axial pins (8a), designed to engage parts having a shape similar to movable gear mesh (6) of said locking bolt element (3), while the rotating part is formed by a disk (8), representing on its front surface a protruding Central section (8b), designed to engage in the Central hole (9b) of the gear wheel (9), while the protruding section (8b) of the disk (8) has a shape having a circular portion bounded on its angular extension by additional surfaces (8b ′), and the central hole (9b) of the gear wheel (9) has a shape having a circular portion bounded on its angular extension by additional surfaces (9b ′). 2. A lock with a fuse according to claim 1, characterized in that between said rotating part (8) and a gear wheel (9), said connection with a play is formed. 3. The lock with a fuse according to claim 1, characterized in that the lock also contains an element (17) for installation in the opening position and the closing position of the element (3) of the locking bolt, elastically pushed to the side surface (8c) of the rotating part (8), which carries the pins (8a) and is intended to return, in the open state and in the closing state, the rotating part (8) to the position in which the pins (8a) are aligned in the direction of movement of the locking bolt element (3). 4. The lock with a fuse according to claim 1, characterized in that the play is equal to the difference in angular elongation between the circular portion of the protruding portion (8b) of the disk (8) and the circular portion of the central hole (9b) of the gear wheel (9). 5. A lock with a fuse according to claim 3, characterized in that the support element is formed by a lever (17) fixed on the casing (2) and pushed to rest against the side surface of the disk (8) through the elastic element (18). 6. A lock with a fuse according to claim 3, characterized in that the side surface of the disk has a smoothed section (8c) in the position corresponding to the section resting on the lever (17), designed to interact with the additional lever profile (17).

Images