RU2319821C1 - Door lock - Google Patents

Abstract

FIELD: ironmongery, particularly locks to protect different objects against intrusion.

SUBSTANCE: lock comprises cross-bar and retention means for cross-bar fixation in locked position. Cross-bar is made as separate member. If one of said members is fixedly connected to movable door part another one is secured to fixed door part. Cross-bar is made as plate with figured cut having varying width, which is rounded in area of cross-bar cooperation with locking member and has diameter exceeding width of linear part of figured cut beginning from cross-bar end. Cross-bar fixation means is made as nut installed so that the nut may reciprocate along shaft provided with thread corresponding to nut thread. Nut section cooperating with cross-bar is shaped as cylinder and has diameter corresponding to that of round cross-bar cut. Overlaying nut section has flat touching finger installed so that nut may slide along finger. Shaft may rotate about longitudinal axis thereof transversely to cross-bar surface. Shaft cross-section diameter corresponds to width of linear figured cut section. The first gear wheel is fixedly connected to shaft and is brought into engagement with that secured to shaft of electric drive, preferably operated by means of controller.

EFFECT: increased reliability of cross-bar fixation in lock body along with improved resistance to breaking-in.

1 cl, 10 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 blocking mode consumes a large amount of electrical 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.

Also known is a door lock containing 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. RU No. 2174581, Е 05 В 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, is characterized in that the bolt is made in the form of a part separate from the housing, while if one of of the said elements is rigidly fixed on the movable door element, the second is rigidly fixed on its fixed element, and the crossbar is made in the form of a plate with a curly cut of variable width, which is on the interaction section of the crossbar with a locking element made rounded with a diameter greater than the width of the rectilinear 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 nut installed with the possibility of reciprocating movement along a shaft equipped with a thread corresponding to the thread of the nut , for which at least the section of the nut interacting with the bolt is made cylindrical with a diameter corresponding to the diameter of the circular cutout on the bolt, and at least its overlay The section is provided with a flat that is in contact with a finger mounted to slide the nut along it, while the shaft is mounted to rotate around the longitudinal axis perpendicular to the crossbar surface, and the diameter of the shaft section corresponds to the width of the rectilinear section of the figured notch, with the gear mounted on the shaft rigidly fixed meshed with a gear fixed to the shaft of an electric motor, preferably controlled via a controller. In addition, the end face of the nut is made with a tapered chamfer. In addition, the length of the nut exceeds the thickness of the cavity of the lock housing, designed to accommodate the bolt.

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 bolt is made in the form of a part separate from the case, while if one of the mentioned elements is rigidly fixed to the movable door element, the second is rigidly fixed to its fixed element" provide the ability to close-open the lock by horizontal movement of the bolt (or lock case ) 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, such a construct This solution provides the possibility of opening and closing the door due to the muscular strength of a person, which allows the rotation drive to be used only to bring the locking device into operation.

The signs "... the crossbar 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 curved cut starting from the end of the crossbar in the section of the crossbar with the locking element" provide the possibility of fixing the crossbar by entering into its round part nuts, moved by the principle of a screw pair, along the threaded shaft, after the bolt is “moved” into the lock case, so that the shaft is coaxial with the rounded portion of the figured cutout of the bolt, which excludes zmozhnost release bolt 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 nut mounted with the possibility of reciprocating movement along a shaft provided with a thread corresponding to the nut thread, for which at least the section of the nut interacting with the bolt is made cylindrical diameter corresponding to the diameter of the round cutout on the crossbar "provide the ability to lock or release the crossbar by turning the shaft.

Signs indicating that at least the overlying portion of the nut "is provided with a flat contacting with a finger mounted to slide the nut along it, while the shaft is mounted to rotate around the longitudinal axis perpendicular to the surface of the bolt" allow the nut to move along the shaft, excluding the possibility of its rotation together with the latter.

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

The signs "... a gear fixed to the shaft fixed in engagement with the gear fixed to the motor shaft" is rigidly fixed on the shaft, which enables the shaft to rotate and thereby reciprocate the movement of the nut on it.

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 features of the second claim provide "self-centering" of the nut in relation to the rounded section of the figured cutout of the crossbar.

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

In Fig.1 shows a section of the lock in a plane parallel to the plane of the bolt in the "closed" position, in Fig.2 - the same in the "open" position; figure 3 shows a view of the crossbar; figure 4 shows the assembly drawing of the castle body; figure 5 shows a view in volumetric projection of the castle body, in the closed position; figure 6 shows the position of the lock on the door.

The drawings show a lock case containing plates 1, 2, and 3, sequentially fastened to each other by jumpers 4 with the formation of an E-shaped profile (in the manufacture of this part is milled from a rectangular piece of metal, selecting grooves, to form a "package" of three plates 1 to 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 is large in height to compensate for the non-linearity of movement of the end of the movable part of the door. the bolt 7 in the locked position, made in the form of a nut 8 (the overlying section of which is provided with a flat 9), put on a shaft 10, provided with a thread corresponding to the thread of the nut 8. The shaft 10 is mounted for rotation around the longitudinal axis 11, perpendicular to the surface of the bolt 7, in the sleeves 12 and 13. In this case, the nut 8 is installed with the possibility of reciprocating movement along the shaft 10, and at least the section of the nut interacting with the crossbar is made cylindrical with a diameter corresponding to the diameter of the rounded section 14 of the cutout 15 of the bolt 7, and its flat 9 is in contact with the pin 16, mounted with the possibility of sliding the nut along it, while the diameter of the section of the shaft 10 corresponds to the width of the straight section 17 of the cutout 15. The gear 18 with the sleeve 19 is rigidly fixed to the shaft the gap 6 and installed in engagement with the gear 20, mounted on the shaft of the motor 21, mounted in the hole 22 of the plate 3 and controlled through a controller (not shown).

The position of the nut 8 on the shaft 10 is controlled intellectually based on feedback from one or more sensors of a known design (not shown in the drawings), for example, limit switches via 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 23 crossing the gap 5 between the plates 1 and 2 and installed with the possibility of abutment to the bottom of the additional slot 24, coaxial with the straight section 17 of the figured cutout 15.

In addition, a conical chamfer 25 is shown at the end of the nut 8, the door jamb 26 and the door leaf 27.

As the controller, an electronic unit, preferably a microcontroller, (for example, Microchip 16 F 684) can be used, 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 that are directly related to ensuring the operation of the lock, the controller can provide a signal about an incorrectly dialed code and / or activate a security alarm, or perform another action provided for in the list of options selected when purchasing a lock.

As the electric motor 21, a reversible electric motor of a known design is used, the power of which corresponds to the operating conditions of the lock.

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 27, so that its curly slot was oriented towards the lock case, which is fixed, respectively, on the door jamb 26.

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, the 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 electric motor 21 is turned on, the rotation of the shaft of which rotation of the gear 20, the rotation of which is transmitted to the gear 18, mounted on the shaft 10, which causes the shaft 10 to rotate. The rotation of the shaft 10, the thread of which interacts with the thread of the nut 8 (the rotation of which is excluded by the pin 16 in contact with the flat 9 of the nut 8), leads to the translational displacement of the nut along the shaft 10, until the nut intersects the rounded section 14 of the curved notch 15 of the bolt 7 (with a deepening of the end nuts in the upper part of the hole 28 made in the plate 1). Thus, the ends of the nut 8 are fixed in the plates 1 and 2. In the process of starting the introduction of the end of the nut 8 into the rounded section 14 of the figured notch 15 of the crossbar 7, the bevel 25 provides "self-centering" of the nut 8 with respect to the walls of the figured notch of the crossbar.

To open the lock, it is necessary for the controller to receive the corresponding code signal from the outside, which is provided by the user by entering a code signal into the controller using 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 moving the nut 8 on the shaft 10 to one of the positions (open or closed) by the electric motor 21.

When attempting a rough break by squeezing the door leaf 27 with a jack, the bolt 7 is deformed and jammed in the cavity of the lock case, because thickened “shores” of the rectilinear section 17 of the cross-section of the bolt creep (pull) on the shaft of the nut 8, bending, respectively, up and down, 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 “outward” and “inward”, including on 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 eliminates 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 greatly complicates the opening of 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 (3)

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 the said elements is rigidly fixed on the movable door element, the second is rigidly fixed on its fixed element, and the bolt is made in the form of a plate with a curly cut of variable width, which in the area of interaction of the bolt with the locking element not rounded with a large diameter diameter of a straight section of a curved notch starting from the end of the bolt, in addition, the bolt fixation device in the locked position is made in the form of a nut installed with the possibility of reciprocating movement along a shaft provided with a thread corresponding to the nut thread, for which, at least the section of the nut interacting with the crossbar is cylindrical with a diameter corresponding to the diameter of the circular cutout on the crossbar, and at least its overlying section is provided with a flat in contact with a finger installed with the possibility of sliding the nut along it, while the shaft is mounted to rotate around the longitudinal axis perpendicular to the surface of the bolt, and the diameter of the shaft section corresponds to the width of the straight section of the figured cutout, with the gear fixed in mesh with the gear fixed to the shaft mounted on the shaft of an electric motor, preferably controlled via a controller. 2. The lock according to claim 1, characterized in that the end face of the nut is made with a tapered chamfer. 3. The lock according to claim 1, characterized in that the length of the nut exceeds the thickness of the cavity of the lock body, designed to accommodate the bolt in it.

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