TECHNICAL FIELD

The invention is generally related to a door lock.

The invention is particularly related to a structure that enables both sides of the door handle to move independently from each other.

BACKGROUND OF THE INVENTION

Nowadays, there are several types of door locks in use. Door locks are generally activated by a handle. The handles on both sides of the door enable the door to be opened from both inside and outside.

Door handles of the present art are rotated by a shaft, usually in the form of a square, which passes through the lock. In this process, when the door handle is rotated from one side of the door, the handle on the other side rotates automatically.

In the known state of the art, application number CN1079871C titled “Door lock device” mentions a door lock mechanism. In this patent document, it is observed that when one door handle moves, the other door handle does not move. However, the structure providing this feature is rather complex and costly.

In the known state of the art, application number CN207245388U titled “Novel safe intelligent lock” mentions a novel and safe intelligent lock mechanism. In this patent document, it is observed that when one door handle moves, the other door handle does not move. However, the structure providing this is rather complex and costly. Consequently, constant improvements are made for the locks and therefore, new structures that will eliminate the above-mentioned disadvantages and bring about solutions to the present systems are needed.

OBJECTIVE OF THE INVENTION

The present invention is related a lock that meets the above-mentioned requirements, eliminates all disadvantages and brings about some additional advantages.

The main objective of the invention is to provide a simple lock structure that will ensure that when one door handle is rotated, the other door handle does not rotate.

The structural and characteristic features of the invention as well as all the advantages will be understood more clearly from the drawings in the following and the detailed description written with reference to these drawings. The evaluation should therefore be made in consideration of these drawings and the detailed description.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to better understand the structure of the present invention and its advantages with the additional elements, it should be evaluated together with the figures described below.

Figure 1 is the isometric view of the lock as the subject of the invention.

Figure 2 is the disassembled view of the lock as the subject of the invention.

Figure 3 is the isometric view of the lock latch as the subject of the invention.

Figure 4 is the front sectional view of the lock structure as the subject of the invention.

Figure 5 is the isometric sectional view of the lock structure as the subject of the invention.

Figure 6 is the isometric view of the lock structure as the subject of the invention. REFERENCE NUMBERS

1. Lock

2. Lock case

3. Left door handle bar 3'. Right door handle bar

3.1 Joint

4. First latch

4'. Second latch 4.1. First square hole

4.2 Second square hole

5. Latch bolt

6. Knob

7. First spring

7'. Second spring

8. First washer

8'. Second washer 8". Third washer

DETAILED DESCRIPTION OF THE INVENTION

In this detailed description, the preferred structures of the lock as the subject of the invention are explained only for the better understanding of the subject and without any limiting effect.

Figure 1 is the isometric view of the lock (1) as the subject of the invention. The lock (1) is composed of the lock case (2) on the outside, other parts therein, and the handle (9) for opening the door.

As scan be seen in Figure 2, there are parts mounted on the lock case (2). There is a latch bolt (5) which ensures that the door is closed and opened when the handle (9) is rotated. There is a knob (6) at the other end of the latch bolt (5). The left door handle bar (3) and the right door handle bar (3'), which are passed through the lock case (2), are one piece but able to rotate independently from each other. The first latch (4) attached on the left door handle bar (3) presses on the knob (6) to move the latch bolt (5). On the other side, the second latch (4') attached on the right door handle bar (3') presses on the knob (6) and allows the latch bolt (5) to move. The first spring (7), which is in contact with the first latch (4), helps the first latch (4) to return to its original position. Similarly, the second spring (7') in contact with the second latch (4') helps the second latch (4') to return to its original position. The first latch (8), the second washer (8'), and the third washer (8") in the structure help to keep the distance between the parts and prevent the formation of noise by preventing the friction of the parts. The first square hole (4.1) and the second square hole (4.2) in the structure of the first latch (4) and the second latch (4') allow the left door handle bar (3) and the right door handle bar (3') to pass through and this allow these latches to rotate easily. The joint (3.1) located between the left door handle bar (3) and the right door handle bar (3') allows the left door handle bar (3) and the right door handle bar (3') to rotate independently from each other.

As can be seen in Figures 4, 5 and 6, the second latch (4') moves with the rotation of the right door handle bar (3')· The second latch (4') also puts pressure on the knob (6) section from its end section and enables the door to be opened by allowing the latch bolt (5) to be freed from the slot in which it is located. The second spring (7') in the structure returns the second latch (4') to its original position after the door is opened. In the meantime, the left door handle bar

(3) on the other side of the door and the first latch (4) and first spring (7) connected to the same remain motionless.