RU106642U1 - SECRET HEAD OF MECHANICAL LOCKING DEVICE - Google Patents

Abstract

 1. A secret head of a mechanical locking device comprising a housing, inside the cylindrical cavity of which a central rotary cylinder is installed, in which a turn-key slot extending to its side surface is made, and a number of coaxial pin holes are made in the housing and in the rotary cylinder from the turn-key slot, in which the parts are placed, for example pins, which enable the lock to be opened only with the key whose contact surface with these parts is made in accordance with an ode formed by a combination of sizes and relative positions of said parts, the head having means for transmitting movement from the rotary cylinder to the mechanism of movement of the bolt of the lock connected to the said rotary cylinder, characterized in that in the cavity of the housing are additionally installed concentrically arranged fixed relative to the housing and rigidly a connected hollow cylinder spanning the central cylinder and a second rotary cylinder spanning the stationary cylinder, in which the filling cylinders are provided with pin holes coaxial in the initial position with recesses in the central cylinder and in the housing for the pins, on the opposite key inlet end face of the central cylinder, a lever having at least one shoulder is rigidly fixed, the shoulder protruding opposite the second rotary cylinder, on the end of which has at least two stops for the said lever, offset from the lever in the initial position by an angle ± β, selected from the condition β> α, where α is selected from the condition sin α / 2 = d \ D, where d is the diameter

Description

The invention relates to locking devices, and more particularly to locking devices used to lock the doors of residential premises, offices, safes and deposit cabinets, and can also be used in locking devices for domestic and industrial facilities.

The most common locks are mechanical, among them cylinder pin locks.

One of the main qualities of the castle is the time spent opening it with a master key. Middle-class European locks are opened with a master key in 3-10 minutes, an indicator of the highest 4th class - 30 minutes.

Basically, all the locks work as follows. Having inserted the key into the keyhole, we turn it clockwise or counterclockwise. At the moment the key is rotated, the key code and the lock are compared. If the codes do not match, the key does not rotate at all. By inserting a master key instead of a key, it is possible to change individual key segments, not the entire key code as a whole.

A secret head of a mechanical locking device is known, comprising a housing, inside of a cylindrical cavity of which a central rotary cylinder is installed, in which a turn-key slot extending to its side surface is made. A number of coaxial recesses are made in the housing and in the rotary cylinder from the turnkey side of the slot, in which parts, pins, rods and springs are placed, which enable the lock to be opened / closed only with the key whose contact surface with these parts is made in accordance with the code formed by a combination of sizes and relative positions of said parts. The pins on the key side are tapered. The key has holes of different diameters, which allows you to change the position of the pins relative to the key. The lock head has a means for transmitting movement from the rotary cylinder to the mechanism for moving the bolt of the lock (application RU 95108267/12 of 05.22.1995, published on 12.27.1996).

In locking devices of this type, several holes located along the housing coincide with the corresponding holes in the rotary cylinder. This allows the rods that are located inside the housing to fall into adjacent holes in the cylinder. The rods are supported by springs, so that when the key is not inserted into the locking mechanism, they automatically extend into the cylinder and prevent its rotation. A key inserted into the lock advances the rods until their upper surface aligns with the outer surface of the cylinder. The key does not directly touch the rods, but its profile is transmitted to the rods through the pins. Turning the key locks or unlocks the lock.

A disadvantage of the known secret head is its vulnerability to modern methods of non-destructive opening of locks, such as picker and bumping.

The essence of the picker is that a wire loop bent in the form of a safety pin strikes simultaneously all the code pins, forcing them to transfer energy to the blocking elements. And at the moment of their simultaneous jump they turn the cylinder

During the manipulation of the opening, the rotary cylinder of the pin lock is loaded with a slight torque. With a master key, the code pins are recessed, starting from the first clamped one.

When bumping, a simultaneous jump of the pins is achieved through the use of a special key, which is used to apply gentle blows.

The utility model is based on the task of creating a secret head of a mechanical locking device that cannot be opened with non-destructive methods and in which, at the time of comparing the lock and key codes, changing the key code is not possible.

The problem is solved in that in the secret head of a mechanical locking device containing a housing, inside the cylindrical cavity of which a central rotary cylinder is installed, in which a turn-key slot extending to its side surface is made, moreover, in the housing and in the rotary cylinder from the turn-key slot side, a series of coaxial pin holes in which the parts are placed, for example, pins that make it possible to open the lock only with the key whose contact surface is with and the parts are made in accordance with a code formed by a combination of sizes and relative positions of the said parts, the head having means for transmitting movement from the rotary cylinder to the locking bolt moving mechanism, connected to the said rotary cylinder, according to the utility model, concentrically arranged stationary relative to the housing and rigidly connected to it by a hollow cylinder spanning the central cylinder, and a second rotary cylinder spanning a fixed cylinder, and in said additional cylinders, pin holes are made, coaxial in the initial position with recesses in the central cylinder and in the housing for the pins, on the opposite key inlet end face of the central cylinder, a lever having at least one shoulder is rigidly fixed, the shoulder protrudes opposite the second rotary cylinder, at the end of which at least two stops are made for the said lever, offset from the lever in the initial position by an angle ± β, selected from the condition β> α, g de α is chosen from the condition sin α / 2 = d \ D, where d is the diameter of the pin hole, and D is the diameter of the central rotary cylinder.

In the lock with the proposed head, inserting the key into the keyhole and turning it a few degrees, we transfer the key code to the storage device. Comparison of the lock code does not occur with the key or master key code, but with the code recorded in the storage device. Therefore, no manipulations with individual segments of the castle are possible. The design of the device is simple, does not require high precision manufacturing of parts. Allows large gaps between the rubbing parts. It is not amenable to modern methods of non-destructive opening of pin locks, such as picker, bumping.

The utility model is illustrated by drawings, which show:

Figure 1 is a schematic longitudinal section of a head in the plane of a row of axes of coaxial recesses in a neutral position without a key.

Figure 2 is a front view of the secret head.

Figure 3 is a rear view of the secret head with two stops.

Figure 4 is a rear view of the secret head with four stops.

5 is a transverse section of the head along the axis of one of the rows of coaxial recesses without an inserted key.

6 is a diagram of the position of the pins and balls in the device with the corresponding key.

7 is a diagram of the position of the pins and balls in the device with the wrong key.

Fig. 8 is a diagram of the position of the pins and balls when turning the key.

The secret head of the mechanical locking device comprises a housing 1, inside a cylindrical cavity of which a central rotary cylinder 2 is mounted concentrically, a cylinder 3 stationary relative to the housing 1, and the rotary cylinder 2 surrounding, and a second rotary cylinder 4, which surrounds the stationary cylinder 3. The housing 1 and the stationary cylinder 3 are attached to the front panel with 5 screws 6. In the central rotary cylinder 2 there is a turn-key input slot 7 facing the end and its lateral surface 8. In the housing and in all cylinders with side slits 7 turnkey performed a number of coaxial pin bores 9, 10, 11, which are placed in the parts, such as pins 12, the balls 13 and springs 14. The springs 14 enables the device to work in any position. The installation sequence of the two balls and the pin of the central rotary cylinder 2 and the stationary cylinder 3 depends on the code that is assigned to this segment.

The lever 15 and the means 16 (bracket) for transmitting movement from the rotary cylinder 2 to the mechanism for moving the bolt of the lock (bolt, which is conditionally not shown) of the locking device are rigidly fixed on the opposite end of the turn-key slot 7 of the central cylinder 2. Lever 15 can be either single-armed or two-armed. To balance the forces, it is advisable to make the lever two shoulders, as shown in the explanatory drawing. The shoulders of the lever 15 protrude opposite the second rotary cylinder 4. At the end of the rotary cylinder 4 there are stops 17 for said lever 15. The stops 17 are offset from the initial position of the lever by an angle ± β. Thus, the kinematic connection of the central rotary cylinder 2 and the second rotary cylinder 4 is shifted by an angle ± β. The emphasis may be mainly two or four. The four stops are optimally set to reduce the idle rotation of cylinder 2. To fix the initial position of the rotary cylinders 2 and 4, latches 18 and 19 are installed. Additional cylinders 3 and 4 are designed to fix the key code, since when the central rotary cylinder 1 is rotated by an angle greater than α exclude the possibility of changing it.

In the initial state, under the influence of the latches 18 and 19, all the movable parts of the device are located so that all the pin holes are coaxial (figure 4). In this case, the points 20, 21 of the central cylinder 2 will be respectively opposite the points 22, 23 of the stationary cylinder 3. When installing the key 8 (figure 5), the balls 13 and pins 12 are moved vertically depending on the shape of the key (its code). When the key is turned through an angle ± α (Fig. 7), the rotary cylinder 2 will block the pin holes of the cylinder 3. The minimum value of the angle α is calculated by the formula sin α / 2 = d \ D, where d is the diameter of the pin hole, and D is the diameter of the central rotary cylinder. In this case, when turning to the right, point 20 will become opposite to point 23, that is, cylinder 2 will turn by an amount equal to the diameter of the pin hole. When turning to the left, points 21 and 22 are respectively combined. Balls and pins in all parts of the device (except cylinder 2) will be fixed in the positions corresponding to the key code. You can change their position only by returning cylinder 2 to its original position. When the key is rotated through an angle ± β, the lever 15 abuts against the stops 17 (Fig. 3). The angle β is selected from the calculation β> α. The optimum angle is β, selected from the condition 90≥β> α. If there are two stops 17, the angle β will be within 90≥β> α. If there are four stops 17, the angle β will be within 45≥β> α. It is impractical to choose an angle β> 90, since there will be an unreasonably large idle turn of cylinder 2. It is not advisable to choose an angle β <α, since the angle α is selected from the condition that the pin 3 of the cylinder 3 completely overlaps the pivot cylinder 2 until the lever 15 touches the stop 17.

If the key code corresponds to the lock code, the pins 12 will be installed in the center of the cylinder 4 (Fig. 5) and it will turn around, making a complete revolution, that is, the locking device will trigger. If at least one segment (Fig. 6) does not match, the pin 12 will stop the rotation of the cylinder 4. In this case, the cylinder 2 can only turn by an angle ± β.

The above system of the locking device provides 3 options for one segment (figure 1). The number of options for one segment can be from two or more. The number of balls in the rotary cylinder 2 is defined as the number of options minus one, i.e. 3 - options - 2 balls, 4 - options - 3 balls, etc. The length of the pin is equal to the diameter of one ball multiplied by the number of options.

Claims (5)

1. A secret head of a mechanical locking device comprising a housing, inside the cylindrical cavity of which a central rotary cylinder is installed, in which a turn-key slot extending to its side surface is made, and a number of coaxial pin holes are made in the housing and in the rotary cylinder from the turn-key slot, in which the parts are placed, for example pins, which enable the lock to be opened only with the key whose contact surface with these parts is made in accordance with an ode formed by a combination of sizes and relative positions of said parts, the head having means for transmitting movement from the rotary cylinder to the mechanism of movement of the bolt of the lock connected to the said rotary cylinder, characterized in that in the cavity of the housing are additionally installed concentrically arranged fixed relative to the housing and rigidly a connected hollow cylinder spanning the central cylinder, and a second rotary cylinder spanning the stationary cylinder, in which the filling cylinders are provided with pin holes coaxial in the initial position with recesses in the central cylinder and in the housing for the pins, on the opposite key input end face of the central cylinder, a lever having at least one shoulder is rigidly fixed, the shoulder protruding opposite the second rotary cylinder the end of which has at least two stops for the said lever, offset from the lever in the initial position by an angle ± β, selected from the condition β> α, where α is selected from the condition sin α / 2 = d \ D, where d is the diameter pin hole, and D is the diameter of the central rotary cylinder. 2. The secret head of the mechanical locking device according to claim 1, characterized in that the angle β is selected from the condition 90≥β> α. 3. The secret head of the mechanical locking device according to claim 1, characterized in that the angle β is selected from the condition 45≥β> α. 4. The secret head of the mechanical locking device according to claim 1, characterized in that the lever fixed to the end of the central rotary cylinder is double-armed. 5. The secret head of the mechanical locking device according to claim 1, characterized in that at the end of the second rotary cylinder there are four stops.