The subject of the invention is a cam advantageously for inserting into lock body.

Cylinder locks are usually easy to break and, unfortunately, are quite easy to open without a key, despite any advanced cam that may be used in them, for example by disassembling the lock body. Common cylinder locks have a lock body that consists of two parts, and the pusher, which can rotate freely and is used to turn the lock body and the axis when rotated, is inserted between the two parts of the lock body, approximately in the middle of the lock body. It is true in general that the thinnest and weakest part of a lock body is the part where the two lock body parts meet and where the cam needs to be rotated, and this is also the area that is frequently target by unauthorized intruders. It is also a known solution to reinforce this middle part where the two lock body parts meet. However, such locks are also easy to break even by using a simple tool due to the rudimentary and weak implementation and easy detachment of the pusher.

The state of the art includes the following known solutions. International patent documents Nos. WO2009055881 Al, WO2012129615 Al, WO2014172760 Al and WO2014176647 Al describe secure cylinder locks that are fitted with a pusher.

International patent document No. WO2009055881 Al describes a lock in which the cam is placed between the lock body parts in a freely rotating manner.

International publication document No. WO2012129615 Al describes a security lock that can be used in houses, cupboards, and strongboxes in a versatile manner, in which the cam part consists of two parts, is somewhat more advanced, and has an edge.

International publication description No. WO2014172760 Al describes a cylinder lock in which the pusher, capable of rotating freely, is located between the two lock body parts, is reinforced, and is easy to install.

International patent document No. WO2014176647 Al describes a lock mechanism designed to prevent burglary, in which the cam is placed in a track located on one part of the lock body. Thus, a disadvantage of the described solutions is that they are just as easy to break as before, despite the fact that the popular lock cylinders are fitted with a presumable stronger pusher, because the small edge is unsuitable for keeping the lock body together. There is no point in reinforcing that small part of traditional locks, the approximately 0.2 mm wide edge is not enough to keep the lock together and make it unbreakable. Such locks may be disassembled even with the use of weak tools, and the lock bolt may be turned by reaching through the hole. The design, location, and method of operation of the cam weakens the cylinder lock body. As a consequence, it is almost entirely pointless to use to expensive pushers forming part of the state of the art because they do not provide any extra protection.

The purpose of the invention is to eliminate the errors of known solutions and to implement a device that reinforces the weakest part of the lock mechanism, can resist traversing forces, keeps the entire lock body together, and thereby prevents the breaking or pulling of the lock mechanism.

The inventive step is based on the recognition that it is advantageous to implement the cam according to claim 1 and to use an implementation form involving rings and connected to the two lock body parts and the axis that is capable of keeping the lock body together with sufficient strength. This recognition makes it possible for the lock mechanisms fitted with such a cam to be unbreakable.

In line with the set purpose, the most general implementation form of the solution according to the invention is described in claim 1. The various implementation forms are described in the sub-claims.

The solution is, in general, a cam advantageously for inserting into a lock body, which is fitted with a pin, which can rotate the lock bolt, and a holding part.

A distinctive feature of the invention is that the cam is fitted with a ring, a rotator holding pocket, an axis rod ring receiving pocket located in the cam ring, and the cam ring is connected to the cam ring receiving pocket located in the lock body so that it can turn, and the axis rod ring is placed into the axis rod ring receiving pocket so that it can turn.

It may a distinctive feature that the diameter of the largest section of the cam ring is not greater than the diameter of the largest section of the pusher.

It may be another distinctive feature that the cam has two, at least approximately identical parts, which parts are built into one through the holding part.

In another implementation form, the pin consists of two, at least approximately identical parts. In another implementation form, that it is fitted with cogs that allow it to connect to a cogwheel.

The invention is presented below in more detail through its implementation forms and on the basis of drawings.

On the attached drawings,

Figure 1 shows an axonometric image of the pusher,

Figure 2 shows an axonometric drawing of the cam located on the axis rod,

Figure 3 shows an axonometric drawing of the cam located in the lock body, and

Figure 4 shows an axonometric drawing of the cam with cogs.

Figure 1 shows a spatial image of the cam 1 consisting of two parts. The ring-shaped implementation of the cam 1, the task of which is to rotate the lock bolt, is clearly visible on the drawing. The cam rings 2 provide a stable connection between the cam 1 and the axis rod, as well as with the lock body. The cam rings 2 are implemented so that they include the axis rod ring receiving pocket 7. The two parts of the cam 1 are connected to each other through the holding part 4, which creates a holding and strong connection. The cam ring 2 also helps the cam 1 to fit into the lock body. The cam rings 2 located on the side of the cam 1 and serving receiving and fitting purposes may be implemented with a relatively high level of tolerance regarding their form and size, their length may go until the lock core and their width may be increased up to the total width of the pusher. There is a rotator holding pocket 11 inside the cam 1 that allows the rotors to be inserted and appropriately fitted. The pin 12 of the cam 1 turns the lock bolt.

Figure 2 shows the cam with the axis rod 5. The axis rod 5 has axis rod rings 6 that fit into the axis rod ring receiving pockets 7 located on the cam rings 2. The two parts of the cam 1 are connected to each other with the holding part 4, for example by screwing them together. This way a perfect and holding match and connection can be created. The axis rod rings 6 are located, or they fit into the cam 1 and the axis rod ring receiving pockets 7 thereof with a level of matching tolerance so that it they do not prevent the axis rod 5 from turning with the key. The pocket in the middle of the cam 1 houses the rotors 8 and allows them to move freely. The key opening 10 is visible on the end of the axis rod 5. Figure 3 shows the entire lock body 9 with the axis rod 5 in it. The key opening 10 is visible on the end of the axis rod 5. The cam 1 is visible between the two parts of the lock body 9, which is connected to both the lock body 9 and the axis rod 5 in a stable and strong manner. Due to its design, it is also capable of resisting traversing forces. It is also visible how the cam rings 2 of the cam 1 fit into their place in the lock body 9, i.e. into the cam ring receiving pockets 3. It is also visible how the axis rod rings 6 fit into the axis rod ring receiving pockets 7 located in the cam rings 2. After they are screwed together, the cam 1 and the lock body 9 create a rather compact, consolidated, and whole unit, for the purpose of breaking resistance, which is almost immune against breaking. The key placed into the key opening 10 rotates the pusher, thereby opening the lock. Due to its ring-shaped form, the structure of the cam 1 holds together the entire lock body 9. The two parts of the cam 1 are connected through the holding part 4, for example by screwing. The drawing also shows the design that plays a significant role in implementing a durable lock mechanism that provides protection against burglary. The cam rings 2 are located in the cam ring receiving pockets 3 of the lock body 9, and the axis rod rings 6 fit into the axis rod ring receiving pockets 7. Thus, the rings provide dual fitting and reinforcement for the connection, which create adequate protection, a strong connection, while still allowing all units to turn independently from each other. Due to its presented structure, the cam 1 also holds together the two parts of the lock body 9 strongly, thereby reinforcing the otherwise weakest part of a lock mechanism.

Figure 4 shows the cam 1 with cogs 13. The cogs 13 on the cam 1 create a cogwheel, and this implementation allows the device to be built into bar locks and any other lock operating with cogwheels. The figure also shows the axis rod ring receiving pockets 7 in the cam rings 2, as well as the holding part 4 connecting the two parts of the cam 1 to each other. The rotator holding pocket 11 is visible inside the cam 1 , which allows for the appropriate location and fitting of the rotators. The cam can be used in lock mechanisms that are designed to be capable of housing it. The invention enhances the security of lock mechanisms it is used with. The device may be used in locks operating with cogwheels, in which case the outside of the cam is fitted with cogs that fit into the cogwheels.

The presented device has numerous advantages. An advantage of the invention is that it is capable of preventing the breaking or pulling of the lock, which methods are popular amongst burglars. The presented cam is capable of holding together the lock body consisting of two parts with sufficient force, thereby reinforcing the usually weakest part of a lock mechanism. It should also be noted that the device cannot be fitted into all known cylinder locks due to its design. Its structure creates a very strong connection, i.e., a dual ring connection and dual fitting, which provides adequate protection and creates a strong connection, while it still allows all units to turn independently from each other. The axis rod connecting to the pusher, on the one hand, and the lock body, on the other hand, are connected to and fit into each other with an axis as the centre. An advantage of this is that the cam cannot be removed by applying a traversing force, meaning that a much larger force needs to be applied to possibly break the lock. It is also advantageous that the cam rings may be lengthened until the lock core and widened until the edge of the pusher, meaning that the implementation may be reinforced even further and the sizes may be customized. It is also an advantage that the device may be built into locks that operate with cogwheels, such as bar locks, if the cam is fitted with cogs.

In addition to the above examples, the invention may be implemented in other shapes and with other manufacturing procedures as well within the scope of protection.