SI26394A - Window latch lock - Google Patents

Abstract

The invention solves the problem of implementing a simple and effective window latch lock, where the latch is made of only two parts, the housing (1) and the slider (2). The slider (2) has several functions at the same time: it is a latch, a grip, a spring, and a catch. The latch is locked by pressing the handles (7) and (8) to insert the slide (2) through the symmetrical openings (5) in the direction of the housing (1) so deep that the slide (2) is finally locked with a snap ( 4) for the edge of the opening (5). The latch is automatically unlocked by pressing both sides of the handles (7 and 8). In doing so, the handle (7) itself moves towards the slot (6), and with it the catch (4), which releases the latch (2) so that the slider (2) can then be pulled away from the housing (1) ).

Description

Window latch lock

The object of the invention is a lock for a window latch, more precisely, a mechanism that automatically locks a closed window so that the windows from the outside, e.g. with vibrations or shocks, cannot be opened. The lock is integrated into the window latch itself, i.e. in preparation for closing the window from the inside.

The technical problem solved by the invention is how to design such a window latch, which will simultaneously include an effective lock, i.e. the window latch is locked in the closed position, with the goal being that the latch is made with a minimum of parts, therefore it allows for easy installation, and at the same time, its lock allows the user to automatically lock the window when closing and automatically unlock it. It therefore enables easy use, but at the same time also a high level of security.

There are several types of window locks on the market. Conventional window latches, which are found on single or double-hung windows, prevent opening from the outside relatively well, as they use a simple mechanism to connect e.g. both window sashes and prevent them from moving. So they hold the window sashes in place and thus lock the window, but security experts recommend that it should not be the only "lock" on the windows of a home, cottage, caravan or motorhome.

Furthermore, we find folding locks that are built into the window frames. These are latches with rotating levers, and the locking is done with the help of buttons and springs (spring catch for windows). When the levers are down, the folding latches keep the wings locked, when they are up, the latch is released. They are a standard mechanism that is usually included with casement windows at the time of purchase.

We also know window pin locks, which are similar to chain locks for doors. One part of the lock is attached to the sash, the other to the window frame. The parts are connected to each other by a cable or chain, which prevents the window from opening very wide.

For greater security, even key locks are used, where a key is required to close and open the windows, which can be quite time-consuming for the user.

Finally, there are sliding window locks on the market that are used for sliding windows: they are movable pins that screw into the guide of the sliding window and thus prevent the window from opening more than desired. This solution is cheap, easy to use and can be moved from one window to another as needed.

Among the latest patents in this field, we find a series of improvements to these basic types, but they are becoming more and more complex. For example patent US10961748 describes a locking system installed around the entire perimeter (frame) of the window, an assembly that is mounted slidingly inside the window casing. Patent application WO2021147541 describes a door or window lock with a hidden handle. The lock according to patent application W02022064410 is similarly complex. Such inventions certainly represent progress in the state of the art, but the question is whether they are attractive to manufacturers due to their large number of individual parts, since the proposed assemblies presuppose difficult serial production and, last but not least, assembly itself.

The next set of patents, such as WO2022099654 or EP3506216, describes "smart" locks with electronic parts such as sensors, processors, displays.

The present invention has little in common with them. It is a simple and effective solution, which will be described on one of the possible implementation examples and on the sketches showing:

fig. 1: showing the basic parts of the assembly (latch with lock) in the disassembled state.

fig. 2: view of the basic parts of the assembly from the other side.

fig. 3: showing the assembly of the slide into the housing.

fig. 4: showing the closed position when the slider with the tooth is finally locked into the housing, this picture also shows the opening method.

fig. 5: showing the closed position from the opposite side.

Figures 1 and 2 show the invention in its disassembled state. The window latch must lock in the closed position so that the window cannot be opened from the outside. The latch consists of only two parts, i.e. the housing 1 and the slider 2. On the housing 1 there are symmetrical openings 5 with grooves 10. The slider 2 is designed in such a way that it has two elastic grips 7 and 8, which are separated by a gap 6. Two more symmetrical latches 3 and (only one) latch 4 are integrated on it. On the lower side of the slide 2, there is a guide rib 9. The openings 11 serve to fasten the housing to the window with the appropriate screws.

The latch is assembled in such a way that, by pressing the grips 7 and 8, the slide 2 is inserted through the symmetrical openings 5 in the x direction (that is, towards the housing 1) so deeply that the symmetrical catches 3 engage with the inner edge of the opening 5, as shown in the figure 3. If we move the slider 2 further in the x direction (in picture 3), it is finally locked with a catch 4 for the edge of the opening 5 (picture 4).

The lock is unlocked by pressing the grips 7 and 8 on both sides with a force F. Due to the guide rib 9 located in the groove 10, the grip 7 itself moves in the y direction (toward the slot 6), and with it the catch 4, which thereby it releases the latch 2 so that it can be pulled in the x direction, i.e. away from the housing 1 (Figures 4 and 5).

The handles 7 and 8 on the slide 2 are designed in a special way and are significantly different from the existing handles or levers, which have the function of triggering the lock or unlock by the user. It is about two, ideally (but not necessarily) symmetrical bodies, which are flat in shape, which means that they measure at least in height (in the x direction), which is separated by slot 6. These two bodies are also movable to some extent, that's why we called them elastic grippers 7 and 8. In our implementation example, they are rounded on the outer sides (different shapes, e.g. angular, could also be possible). This (flat) design has two functions: firstly, it allows the user to use it intuitively, which means that it is practically impossible to make a mistake when unlocking and locking with pressure, and the second function is that the slider 2 is minimally disturbing, that is, it minimally obscures the view through the window.

The advantage of this solution lies in its simple and inexpensive implementation: only two parts of the latch are required, the body 1 and the slider 2. The slider 2 has several functions. There is a latch, a catch, a spring, and a catch. We do not need any preparation or tools for the actual installation on the window. The solution is also extremely easy for the user. When grasping the handles 7 and 8, the slide is automatically unlocked, so that the user does not even notice it and simply pulls it to the open position.

The invention is primarily intended for use with lighter plastic windows, e.g. in motorhomes, caravans and mobile homes, but it can be used for any windows, especially skylights, but also single, double and sliding. The housing 1 and the slider 2 are preferably made of plastic, but it is also possible to use other materials.

Claims (4)

PATENT CLAIMS 1. A window latch lock comprising a housing (1) and a slide (2), characterized in that the housing (1) has two symmetrical openings (5) with grooves (10) and openings (11) for attaching the housing to the window , on the slide (2), which has several functions - it is a latch, a grip, a spring, and a latch - there are two elastic grips (7) and (8), which are separated by a gap (6), two symmetrical latches (3 ) and one catch (4) and guide rib (9) on its underside. 2. A lock according to claim 1, characterized in that the latch is locked by pressing the handles (7) and (8) so that the slide (2) is inserted through the symmetrical openings (5) in the direction of the housing (1) so deep , to engage the two symmetrical latches (3) for the inner edge of the opening (5), and with a further push in this direction, the slider (2) is finally locked with the latch (4) for the edge of the opening (5). 3. Lock according to claims 1 and 2, characterized by the fact that the latch is automatically unlocked by double-sided pressure on the handles (7 and 8), whereby due to the guide rib (9) located in the groove (10), it moves in towards the slot (6) only the handle (7), and with it the latch (4), which releases the latch (2), so that the slider (2) can then be pulled away from the housing (1). 4. Lock according to claims 1 to 3, characterized by the fact that the grips (7 and 8) on the slide (2) are preferably formed as two symmetrical elastic flat bodies separated by a gap (6).