RU2324799C1 - Door lock - Google Patents

Abstract

FIELD: construction, locks.

SUBSTANCE: lock can be used for guarding different objects from access by unauthorised persons. The technical outcome is increased reliability of fixation of the girth rail and increased strength of the lock. The door lock consists of mechanism of fixing the girth rail into a locked position. The girth rail is in the form of a component separated from the case and is in the form of a plate with a figure profile of varying thickness, which on the point of interaction with the girth rail, has a round figure with the diameter of the larger thickness of the rectilinear section of the figure profile, beginning from the end of the girth rail. The mechanism for fixing the girth rail into locked position is in the form of a cylindrical piston, freely fitted on a shaft, one end of which is equipped with threads and is let in with provision for out-in traversing through the cavity of the piston. This cavity has corresponding threads. The pinion is installed with possibility of turning about an axis in line with the longitudinal axis of the shaft and perpendicular to the surface of the girth rail and in gear with the driving pinion gear, fixed to the shaft of the electric motor. The diameter of the cylindrical piston corresponds to the thickness of the rectilinear section of the figure profile. The piston is installed with provision for displacement in line with the indexing holes of the case of the lock and is fixed on the smooth end of the shaft from longitudinal displacement.

EFFECT: improved door lock, providing for protection from breaking in.

6 cl, 7 dwg

Description

The present invention relates to locks, preferably electromechanical.

A door lock is known which comprises a spring-loaded bolt mounted in the housing and a spring-loaded sleeve with a cam that interacts with the bolt. The housing also has a locking mechanism, including an electromagnet and an electromagnet anchor, which is directly a means of blocking the crossbar movement (see SU 972024, ЕВВ 47/02, 1982).

The disadvantages of the device: the electromagnet in the blocking mode consumes a large amount of electric power, this does not allow the lock to be powered from autonomous small-sized power sources, which significantly narrows the scope of its practical application.

A door lock is also known, comprising a housing provided with a cavity configured for reciprocating movement of a bolt in it, and means for fixing the bolt in the locked position (see US Pat. No. 2174581, ЕВВ 47/00, 2001). The lock is characterized by extremely low energy consumption, since to bring the lock nodes to the locked position, it is not necessary to supply power to the bolt fixation device, and to bring the lock mechanisms to the unlocked position, only a short voltage pulse is required, which greatly simplifies the requirements for the power supply and device lock control.

The disadvantages of the device are the insufficient reliability of the bolt fixation, low burglar resistance of the lock (there is a possibility of mechanical extraction of the door in the door frame, there is the possibility of supplying power bypassing the control circuit for triggering the solenoid; there is the possibility of false triggering of the solenoid by physical influences (vibration, magnetic fields); there is the possibility of making any manipulations with the lock up to penetrating into the case without tracking such actions).

The basis of the present invention is the task of improving the reliability of fixation of the bolt and breaking the lock.

The technical result, which manifests itself in solving the problem, is expressed in increasing the reliability of the lock (by minimizing the number of interacting parts), eliminating the possibility of opening the lock during mechanical extraction of the door in the door frame, eliminating the possibility of false triggering of the bolt fixation device using physical influences (vibration, magnetic fields); the possibility of unauthorized production of manipulations with the lock is excluded, energy consumption is minimized, the possibility of opening the door by sawing off the crossbar is excluded.

The result is achieved in that the door lock, comprising a housing provided with a cavity configured for reciprocating movement of the bolt in it, and means for fixing the bolt in the locked position, differs in that the bolt is made in the form of a part separate from the housing, while if one of the mentioned elements is rigidly fixed on the movable element of the door, the second is rigidly fixed on its fixed element, and the crossbar is made in the form of a plate with a curly cutout of variable width, which in the interaction section of the crossbar with a locking element made rounded with a diameter greater than the width of the straight section of the curly cut, starting from the end of the bolt, in addition, the means for fixing the bolt in the locked position is made in the form of a cylindrical piston freely worn on the shaft, one end of which is threaded and skipped with the possibility of return - translational movement through the gear cavity provided with the corresponding thread, while the gear is rotatably mounted around an axis, pine with the longitudinal axis of the shaft and perpendicular the surface of the bolt, and in engagement with the drive gear mounted on the shaft of the electric motor, preferably controlled through a controller, in addition, the diameter of the cylindrical piston corresponds to the diameter of the rounded cut on the bolt, and the diameter of the shaft section corresponds to the width of the straight section of the figured cut, with the piston installed with the ability to move coaxially with the locking holes of the lock housing and is fixed on the smooth end of the shaft from longitudinal movement. In addition, the piston is fixed by means of a key passed through the grooves, one of which is made on the shaft at its smooth end, and the other on the end of the piston facing the said end of the shaft. In addition, the ends of the piston are made with a conical bevel. In addition, the length of the piston exceeds the thickness of the cavity of the lock housing, designed to accommodate the bolt. In addition, the length of the key exceeds the diameter of the piston, while its free end is used as a mechanical element of the control system of the electric motor.

These features of the invention represent its differences from the prototype and determine the novelty of the proposal; these differences are significant, because they provide the achievement of the technical result reflected in the technical task, and are absent in the known technical solutions with the same effect.

A comparative analysis of the set of essential features of the proposed technical solution with the essential features of analogues and prototype indicates its compliance with the criterion of "novelty."

The features of the characterizing part of the claims solve the following functional tasks.

Signs "... the crossbar is made in the form of a part separate from the case, while if one of the mentioned elements is rigidly fixed on the movable element of the door, the second is rigidly fixed on its fixed element" provide the ability to close-open the lock by horizontal movement of the crossbar (or the case lock) across the end of the door, which, in turn, eliminates the possibility of opening the door by sawing the bolt, since the cross-sectional area of the bolt in the gap between the door and the jamb is significantly increased, in addition, this design vnoe solution allows opening and closing the door by the muscular power of man, which allows rotation of the drive only to bring the work of the bolt locking means.

Signs "... the bolt is made in the form of a plate with a curly cut of variable width, which is made round with a diameter greater than the width of the rectilinear section of the curly notch starting from the end of the bolt in the cross section of the bolt and the locking element", which allows the bolt to be fixed by inserting a piston moved by the shaft during the translational movement of the latter through the gear cavity on the principle of a screw pair, after the bolt is “moved” into the lock case so that the piston is coaxial with the rounded section figured cut-out of a crossbar that excludes a possibility of an exit of a crossbar from the lock case (if the door is closed).

Signs "... the locking device of the bolt in the locked position is made in the form of a cylindrical piston loosely mounted on a shaft, one end of which is threaded and passed with the possibility of reciprocating movement through the gear cavity provided with the corresponding thread, while the gear is rotatably mounted around the axis, pine with the longitudinal axis of the shaft and perpendicular to the surface of the bolt, and meshed with a gear fixed to the shaft of the electric motor "and signs" ... the diameter of the cylindrical piston, respectively The diameter of the round cutout on the bolt ”provides the possibility of locking or releasing the bolt by moving the piston when the gear rotates.

The signs "... the diameter of the shaft cross section corresponds to the width of the rectilinear section of the figured cut" provide the possibility of free "pushing" the bolt into the lock case (pushing its straight slot on the shaft).

The signs "... the piston is mounted with the ability to move coaxially with the locking holes of the lock case" provide a rigid fixation of the bolt in the lock case by supporting (fixing) both ends of the piston, while also eliminating the possibility of rotation of the shaft together with the gear.

Signs indicating that the electric motor is controlled through the controller provide the possibility of turning the shaft to a position that allows the lock to open and close after entering the appropriate access code, which also allows to increase the degree of security of the lock when it is controlled through the controller equipped with an access code input means.

The signs "the piston is fixed on the smooth end of the shaft from longitudinal movement" provide the possibility of its controlled reciprocating movement.

The features of the second claim specify the design solution that ensures the retention of the piston on the shaft.

The features of the third claim provide "self-centering" of the piston with respect to the rounded portion of the figured notch of the crossbar.

The features of the fourth claim provide an increase in the tear resistance of the bolt fixation means in the locked position.

The characteristics of the fifth claim provide the possibility of using the keys as an element of the control system, providing on-off of the motor in the extreme positions of the piston.

In Fig.1 shows a section of the castle in a plane parallel to the plane of the bolt, in the closed position; figure 2 is the same in the "open" position; figure 3 shows the position of the lock on the door; figure 4 shows a three-dimensional projection of the castle body, in the closed position; figure 5 and 6 shows a three-dimensional projection of the castle body, in the "open" position; 7 shows a lock shaft.

The drawings show a lock case containing plates 1, 2, and 3, sequentially fastened to each other by jumpers 4 to form an E-shaped profile; in the manufacture of this part is milled from a rectangular piece of metal by selecting grooves to form a "package of three plates 1-3, separated by gaps 5 and 6. The bolt 7 is made with the possibility of reciprocating movement in the gap 5, the input part of which has a large height to compensate for straightness moving the end of the movable part of the door. Also shown is a means of fixing the bolt 7 in the locked position, made in the form of a cylindrical piston 8, loosely mounted with its longitudinal hole 9 on the shaft 10, one end of which is provided with a thread 11 and passed with the possibility of reciprocating movement through the cavity 12 of the gear 13, provided with a thread, the corresponding thread 11 of the shaft 10, while the gear 13 is rotatably mounted about an axis 14 corresponding also to the longitudinal axis of the shaft 10 and the perpendicular surface of the bolt 7. The gear 13 is engaged with a gear 15 fixed on motor shaft 16 is preferably managed by the controller (not shown). The diameter of the cylindrical piston 8 corresponds to the diameter of the rounded section 17 of the figured notch 18 of the bolt 7, and the diameter of the cross section of the shaft 10 corresponds to the width of the rectilinear section 19 of this notch. The piston 8 is mounted to move coaxially with the fixing holes 20, made in the plates 1 and 2 of the castle body (on both sides of the gap 5). The piston 8 is fixed on the smooth end of the shaft from longitudinal movement by means of a key 22 passed through the groove 23 of the shaft 10, made at its smooth end, and the groove 24, made on the end face 25 of the piston facing the said end of the shaft. The ends of the piston 8 are made with a conical chamfer 26, while the length of the piston exceeds the thickness of the gap 5 (cavity of the lock housing, designed to accommodate the bolt 7). The length of the key 22 exceeds the diameter of the piston, while its free end is used as a mechanical element of the electric motor control system, for example, an end photosensor photo interrupter (not shown in the drawings), or an element providing pressure on the limit switches controlling the movement of the piston into the rounded cross-section of the crossbar 7 (not shown in the drawings). The through hole 27 is made in the plate 3. The shaft 10 is also passed through the bushings 28 and 29, respectively fixed in the hole 27 and part of the fixing hole 20 (facing the gear 13) made in the plate 2.

The position of the piston relative to the rounded portion 17 of the figured cut-out 18 of the bolt 7 is controlled intellectually based on feedback from one or more sensors of a known design (not shown in the drawings), for example limit switches, through a controller (not shown in the drawings). In addition, to prevent jamming of the shaft with a bolt, a mechanical stop is used, made in the form of a bolt 30 crossing the gap 5 between the plates 1 and 2 and installed with the possibility of abutment to the bottom of the additional slot 31 made on the side of the bolt 7.

In addition, the door jamb 32, the door leaf 33 are shown.

As the controller, an electronic unit can be used, preferably a microcontroller (for example, Microchip 16 F 684), which functionally includes elements that provide solutions to the following problems:

- input and storage of non-volatile access code;

- Comparison of the access code stored in the controller memory and generated;

- the formation of the control signal of the actuator (respectively, its opening or closing).

The named functions are implemented mainly by software. In addition to these functions directly related to ensuring the operation of the lock, the controller can provide a signal about an incorrectly dialed code and / or activate an alarm or perform another action provided for in the list of options selected when purchasing a lock.

As the electric motor 16 use a reversible electric motor of known design, the power of which corresponds to the working conditions of the castle.

The claimed device operates as follows.

A reading unit is mounted in the door leaf (or on the wall next to the door), the outputs of which are connected in a known manner to the controller of the door lock actuator (ensuring inaccessibility of communication channels from the outside of the door), in addition, a bolt is attached to the vertical end of the door leaf 33, so that its curly slot was oriented towards the lock case, which is fixed, respectively, on the door jamb 32.

The procedure for opening and closing the door (respectively, the extension of the bolt from the lock case and its sliding into the lock case) is carried out by moving the door leaf due to the muscular strength of the user.

When the user closes the door, when the bolt completely enters the lock case, a photo interrupter (not shown in the drawings) is triggered, as a result of which the signal from it goes to the controller, and the controller puts the nut in the “closed” position - the motor 16 is turned on, the rotation of the shaft of which in rotation, the drive gear 15, the rotation of which is transmitted to the gear 13, the rotation of which, interacting with the thread 11 of the shaft 10, causes the latter to translate along the axis 14. The translational movement of the shaft entails the corresponding movement of the piston 8, which, depending on the direction of rotation of the gear 13, either "crosses" the gap 5 (and, accordingly, fixes, that is, locks the bolt), or, on the contrary, is removed from the gap 5, "sliding" into the fixing hole 20 of the plate 1, thereby freeing the crossbar 7.

Conical bevels 26 provide "self-centering" of the piston 8 with respect to the walls of the figured cutout of the bolt and the fixing holes 20.

To open the lock, it is necessary that the controller receives an appropriate code signal from the outside, which is provided by the user by entering a code signal into the controller by means of a code key corresponding to the used controller design. In this case, the elements of the castle work in reverse order.

The procedure of "opening" or "closing" the lock is reduced to the movement of the piston 8 together with the shaft 10 in one of the positions (open or closed) by the electric motor 16.

When attempting a rough break by squeezing the door leaf 33 with a jack, the bolt 7 is deformed and jammed in the cavity of the lock case, because thickened “shores” of the rectilinear section 19 of the cross-section of the crossbar crawl (stretch) onto the shaft with the piston 8, bending up and down, respectively, which makes this method of hacking ineffective.

The claimed device is characterized by the following advantages:

- the drive can be covertly installed on the door in such a way that its location cannot be determined from the outside;

- the ability to install on doors that open both "out" and "in", including sliding, sliding or swing doors;

- electrical compatibility with most existing third-party code access systems (step-by-step mode);

- The “end” installation on the door leaf or frame practically eliminates the possibility of drilling the mechanism, since it is visible “in profile”, the gear and gear being protected, and the rotor hidden by the crossbar, in addition, a “vertical” flat crossbar installed close to the frame , greatly complicates the possibility of sawing it. The crossbar has an equal thickness along the entire length, and not only where "visible";

- installation of the lock on the frame and the "lockable" bolt exclude the possibility of "pushing" the door leaf or pressing the bolt;

- the use of a motor (and not a solenoid or an electromagnet) and the absence of self-cocking excludes various methods of breaking the lock, based on the "provocation" of self-cocking;

- intelligent motor control using feedback from the sensors makes it difficult to open the lock by supplying power to the electric motor bypassing the controller, and also significantly reduces the mechanical wear of the drive and the noise level from its operation;

- low peak power consumption of the drive allows you to use the drive with inexpensive power supplies or batteries.

Claims (6)

1. A door lock comprising a housing provided with a cavity configured for reciprocating movement of a bolt in it, and means for fixing the bolt in the locked position, characterized in that the bolt is made in the form of a part separate from the housing, wherein, if one of of the said elements is rigidly fixed to the movable door element, the second is rigidly fixed to its fixed element, and the crossbar is made in the form of a plate with a curly cut of variable width, which is in the area of interaction between the crossbar and the locking element rounded flax with a diameter greater than the width of the straight section of the curly cut, starting from the end of the bolt, in addition, the locking means of the bolt in the locked position is made in the form of a cylindrical piston freely worn on the shaft, one end of which is threaded and skipped with the possibility of reciprocating through the gear cavity provided with a corresponding thread, while the gear is rotatably mounted about an axis coaxial with the longitudinal axis of the shaft and perpendicular to the crossbar surface, and coupled to the drive gear mounted on the motor shaft, in addition, the diameter of the cylindrical piston corresponds to the diameter of the rounded cut on the bolt, and the diameter of the shaft section corresponds to the width of the straight section of the figured cut, while the piston is mounted to move coaxially with the locking holes of the lock case and fixed on smooth shaft end from longitudinal movement. 2. The device according to claim 1, characterized in that the piston is fixed by means of a key passed through the grooves, one of which is made on the shaft at its smooth end, and the other on the end of the piston facing the said end of the shaft. 3. The device according to claim 1, characterized in that the ends of the piston are made with a conical bevel. 4. The device according to claim 1, characterized in that the length of the piston exceeds the thickness of the cavity of the castle body, designed to accommodate the bolt. 5. The device according to claim 2, characterized in that the length of the key exceeds the diameter of the piston, while its free end is used as a mechanical element of the control system of the electric motor. 6. The device according to claim 1, characterized in that the electric motor is made controllable through a controller.

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