DOOR LOCK AND KNOB SYSTEM WITH INVISIBLE HUB Technical Field

The invention refers to the technical field of fixed constructions and specifically of constructions and more specifically to the field of locks, keys, door or window installations and safes. Even more specifically, it refers to their locks and parts, and in particular to secure locks that are not visible from the outside. Specifically, it refers to a door lock and knob system with an invisible hub.

Backround of the Invention

The door lock and knob system revealed in this invention with an invisible hub has not been revealed in the previous state of the art.

To date, lock cylinders, also known as crankshafts, are generally divided into two categories. The simple cylinder, where the key used is with teeth and usually the cylinder has 5 or 6 balls and the safety cylinder, where the key is flat and has spots, known as imprints. The simple cylinder has few key combinations and so there is a good chance it will open easily with a foreign key or burglary tools. On the other hand, the security hub has millions of key codes and a violation must be made to be opened by someone.

Also further known are the control break cylinders, which have the default breaking system. That is, in case of a burglary, the cylinder breaks at a specific point, preventing it from being breached. The cylinder continues to operate for its holder even after the break. The controlled cutting system exists on both sides of a door.

The biggest disadvantage of cylinders to date is that they are visible. This means that regardless of the level of security they provide, they allow a burglar to intervene in the lock by trying to break it. Essentially, what is being sought is to increase the level of difficulty in a burglary and not to substantially prevent it. Essentially, what is being sought is to increase the level of difficulty in a burglary and not to substantially prevent it. In addition, various solutions proposed to date, such as password entry, electronic locking, or rollers with different key sets per user, have inherent disadvantages that do not allow users to be fully secured.

It is thus the object of this invention to take advantage of the aforementioned disadvantages and shortcomings of the previous technology by proposing a door lock and knob system with an invisible hub.

A further object of this invention is to offer a lock and knob system, where the hub pins are not visible from the outside of the door. A further object of this invention is to provide a door lock and knob system with an invisible hub, where the key is fully inserted into the hub and remains there when the door is opened, while it is extracted after opening it.

A further object of the invention is to present a door lock and knob system, where the safety of the lock does not depend on the coding of the keys and their possible combinations, but on the construction and the individual elements of the hub.

A further object of the invention is the presentation of a lock, knob and key system, where the key is fully inserted into the lock, detached from its handle, contributing to its release and later extracted and reconnected to the handle.

Another advantage of the invention is that it has a suitable shape configuration that prevents visual access inside the house from the lock hole.

These and other objects, characteristics and advantages of the invention will become apparent in the following detailed description.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will become obvious to those skilled in the art with reference to the accompanying drawings in which it is depicted in an indicative non- restrictive manner.

Figure 1 shows in a three-dimensional perspective of the individual components that make up the lock, knob and hub of this invention.

Figure 2 shows in section the door lock and knob system of the invention, in a random snapshot, when entering the key.

Figure 3 presents in a more detailed picture the individual components of the case, the base, the pins and the rotation roller with the lid.

Figure 4 shows the circular case in cross section, with the base and the individual locking elements, such as the pins and springs.

Figure 5 shows the lid of the hub with the centrifugal hole for inserting the key, while

Figure 6 shows the inside of the lid of the hub with the sloping sections for aligning the pins and the full insertion of the key to secure the door.

Figure 7 shows the circular case with its base and notch, on the upper side. DETAILED DESCRIPTION OF THE PREFFERRED EMBODIMENT

Referring now to the accompanying drawings, we will describe indicative applications of the door lock and knob system with an invisible hub, according to an indicative application of the invention.

The inventive system consists of a hub cap (1), Fig. 5, which is round in shape and located on the outside of each door, with only the small cylinder protruding from it, which is grasped and spun by the user. The rest of the cylinder is hidden behind the outer metal sheet of the door, preventing direct access to users. The lid of the hub (1) has a decentralized hole (2) for the insertion of the key (3), Fig. 1 , while in the center has a tube (4), Fig. 6. The lid of the hub (1) on the rim (5) has manufactured threads, in which the rear cover is fixed screw (6) while the rest of the lid of the hub (1) is rotated in one direction, for functional reasons, which will be explained later. Inside the lid (1), there are two inclined levels, the inclined level of pin pressure (7) and the inclined level of key pressure (8).

The tube (4) enters a corresponding pin of the circular case (9) into which the hub (10) enters. On the upper side of the circular case (9) there is a base (11 ), which is adjacent to the circular case (9). The circular case (9) further has a notch (12), Fig. 7, while the hub (10) and the base (11) have at least one row of similar vertical longitudinal holes (13), (14), where through the holes (13) of the hub (10) pass through repulsion springs (15) and locking pins (16) Fig. 3. Thus as the locking pins (16) are pushed upwards, due to the repellent springs (15), their upper part which is narrower, enters the notch (12) and prevents the hub from rotating (10). Above each locking pin (16) there is a corresponding alignment pin (17), extruded by the corresponding extrusion spring (18). The alignment pins (17) and the ejection springs (18) are located inside the longitudinal holes (14) of the base (11) and protrude downwards. At the top of the base (11) a base cover (19) is screwed, while the cover (19) on its upper side has holes through which an axis (20) passes for the rotation of the roller (21).

The hub (10) of the system has the corresponding longitudinal holes (13), with those of the base (11) through which pass the safety pins (16). However, it also has two legs (22) which pass through notches (23) of the hub gear (24) and through a semicircular hole (25) in the back cover (6) of the lid of the hub (1) end on the latch bolt (26) of the system, with which they are fixed screwed using screws (27) located above and below the legs (22) of the hub (10), as shown in Fig. 1. Above the lock there is a knob (28), Fig. 2, which through a shaft (29) ends in a gear (30). At rest, the knob (28) can rotate continuously, since the gear (30) does not withstand any resistance.

The purpose of the whole operation of the door lock and knob system (28) is to engage the gear (30) with the crankshaft (24), so that the user rotates the knob (28), since, at the same time, the alignment of the pins has been made (16) , (17) with the notch (12) of the case (9) to open the latch bolt (26) due to the use of the correct key. Initially, the beginning of the pin pressure inclined level (7) touches the roller (21), without exerting any force on it. When the lock is at rest, the alignment pins (17) rest on the locking pins (16), without pushing them downwards, because the base (11) is pushed upwards by its two fastening springs (31), Fig. 4. Once the base system (11) begins to descend with the roller (21), because it is pressed by the sloping pin pressure level (7), then the alignment pins (17) push the corresponding locking pins (16) and only when there is a correct key with the correct fingerprints on it, align the pairs of pins (16), (17) with the notch (12), to achieve rotation of the hub (10). Therefore, the ejection springs (18) must be stronger than the repulsion springs (15) so that the alignment pins (17) can push the locking pins (16). At this point it should be noted that if one attempts to turn the lid without a key (1) then the alignment pins (17) will push the locking pins (16) further downwards, because there will be no key to offer resistance, and in the final position the alignment pins (17) will have passed through the notch (12) of the circular case (9) and will have entered the longitudinal holes (13) of the hub (10), resulting again in preventing the ability to rotate the hub (10).

For the operation of the system, the correct key (3) which has a detachable handle (32) should be inserted. The key (3) and handle connection (32) may be done magnetically or with a release button or in any other known way, but this is not a subject of this invention. With the complete insertion of the key (3) inside the hole (2) and after the detachment of the handle (32), the user begins to rotate the lid of the hub (1). During this rotation, two functions are performed simultaneously from the inclined planes.

Because the inclined planes during the rotation have different constructive thickness along their entire length, the inclined level of pressure pins (7) presses the rotating roller (21) and the inclined level key pressure (8) presses the key (3) in the same way increasingly inside the hub (10). Examining the result of the rotation of the inclined level of pins pressure (7) concludes in the pressure of the roller (21) which rotates, but at the same time presses the base system 11 with the base cover (19) downwards. This compression leads to compression of the repulsion springs (15) and ejection springs (18) in such way that if the correct key (3) is inserted, the alignment pins (17) and the locking pins (16), are aligned between the notch (12) of the case (9) and the hub (10), allowing its unrestrained rotation. At the same time, when the lid of the hub is rotated (1), the inclined key pressure level (8) presses the key (3) moreover towards the inside of the hub (10). The two legs (22) of the hub (10) are located within the notches (23) of the hub gear (24), which is pushed out. This extrusion leads to the entanglement of the hub gear (24) with the gear (30). The extrusion is achieved thanks to the specified, narrower front end of the key (3), which, while passing through the hole in the back of the hub (10), presses the hub gear (24) to engage, as aforementioned, with the gearbox (30). Thereby, the rotation of the knob (28) can now lead to the movement of the latch bolt (26), so that the door can be opened, since the legs (22) encapsulate and terminate on the latch bolt (26).

On opening the door, the user turns the lid of the hub (1) upside down, so that the key (3) is extracted in order to be reconnected with the key handle (32) and the user to enter the house. The key (3) is removed thanks to the spring (33) located in front of the latch bolt (26), pressing the gear (24) and this in turn pushes the key out of the hole (2) when the lid (1) is fully rotated to its initial position. In addition, when the system is at rest and in order to prevent inside visual access from the hole (2) of the lid, in the back cover (6) there is a configuration (34), in the shape of an inverted C, which serves exactly this purpose.

In addition, the existence of the configuration (34) prevents the insertion of any tool that would allow pressure to be applied to the hub gear (24) in order to engage it with the knob gear (30), so that by force, the hub would be rotated ( 10) using the knob (28). When the lid is rotated (1) and given that the back cover (6) rotates as well, this results in a displacement of the configuration (34), resulting in the hole at the bottom of the hub (10) to be revealed, so that the narrowest end of the key (3 will push the gear (24).

Alternatively and additionally to the aforementioned, there may be more than one series of locking pins (16) and corresponding extrusion springs (18), repellent springs (15), as well as alignment pins (17) with the corresponding vertical longitudinal holes (14) in base (11).

It should be noted at this point that the description of the invention was made with reference to an indicative and non-limiting example of application. Therefore, any change or modification in terms of shape, dimensions, morphology, materials used and components of construction and assembly, as long as they are not a new inventive step and do not contribute to the technical development of the already known, are considered to be inclusive and within the aspects of the present invention.