DE2454398A1 - Mortice lock with handle actuated catch - has leaf spring for holding catch for reducing noise - Google Patents

Abstract

The mortice lock of a door has a catch for holding the closed door in the locked position. This catch is actuated by the door handle and the noise in the lock due to actuation of the handles and the catch is reduced. The lock catch is held in its retracted position by a flexible holding arrangement and when the door is going to be closed then this holding arrangement is withdrawn to allow the movement of the door catch into the locked position. A leaf spring (4) in the lock plate (5) holds the locking edge of the catch (1) in the retracted position. The stop of the leaf spring (4) releases the catch at the moment when the catch begins to move in the closing direction.

Description

Lock for lock latches.

The noise annoyance includes the often very loud closing noises, that occur when closing room and apartment doors.

In a door lock there is the so-called lock latch, which holds the closed door in its locked position.

When the door is closed, the latch with its inclined sliding surface opens pressed against the strike plate located in the door frame and thereby into the lock pushed in. Once the door is in the locked position, the hall can be affected the fall spring into an opening in the strike plate and the door in hers Hold on to the blocking layer. To open a door, the latch must be pulled back into the lock will.

This is done using the door handle with a square pin engages in the lock nut rotatably mounted between the lock plates.

The lock latch is often the cause of unwanted noises.

So z. B. the inclined sliding surface at an unfavorable angle of attack stand so that too great a force has to be used when closing a door. A yall spring that is too strong also requires a greater closing force. Most notably but here is the friction between the sliding surface of the trap and the edge of the strike plate takes effect. Also a carefully crafted lock with a soft latch spring is in the long run by friction, wear and tear may become stiff due to pressing.

The painting of the door and the door frame with the is very special Striking plate is often the cause of increased friction and sluggishness in the lock latch.

Attempts have already been made to achieve more favorable conditions create. But whether mirror, rib, carnies or crank trap, an effective noise reduction could not be reached.

The process of closing a door is when you are not using the door handle down, the following: The door can be moved easily until the moment in which the above case with its inclined sliding surface on the strike plate bumps into the door frame. Now the force has to be strengthened through the interaction The latch pushes itself into the lock from the strike plate and inclined sliding surface.

This force is necessary until the trap is so far into the lock is pressed so that its tip hits the strike plate in the area of the door rebate slides. Now only a small veg is required for the door itself until the Fall can snap into the opening on the strike plate. To overcome this In the final closing path, only a significantly lower force is then required.

However, since this force is not precisely dosed by the human hand and cannot be reduced accordingly at the right moment, it inevitably happens again and again to the fact that a door with too much force and momentum under undesirable Noise is pulled or pushed into the lock. Because of the great response it occurs in the door leaves themselves and in the pluras and stairwells Noise nuisance.

The object of the invention is that of the described Function of the lock latch based noise to reduce to a minimum.

The solution to the problem is achieved in that the lock latch in which they find themselves when the door is opened by the depressed door handle is held in place by a resiliently movable lock, unlocking it when closing the door by the from the door leaf at the time of closure The pressure exerted on the lock is applied to the door so that the latch is released and engages in the strike plate.

The drawings show an example embodiment. In Fig. 1 is a door lock of conventional design with the main functional elements omitted a lock plate and some fastening elements serving to hold the lock plates together shown. Fig. 2 shows the side view with a view of the lock faceplate and Fig. 3 shows a section through the lock at the level of the trap. The lock parts correspond basically those in a known design. Only the palle (fl) is to the extent that it is changed to the extent that it is on the blocking surface (2) with a groove-shaped Recess (3) is provided. This recess results in the leaf spring (4) required margin. The leaf spring (4) is on the lock plate (5) by means of attached to the rivet (6). With the above hall (1), i.e. in the closed position, the leaf spring (4) slides with the locking edge (7) in the recess (3).

Fig. 4 shows a door leaf (8) with a door lock equipped in this way. The latch (1) and the leaf spring are in the retracted state (4) holds the latch (1) back in the lock with the locking edge (7). With one like that locked latch can-the door unhindered until shortly before the final blocking position be pressed or pulled into the door frame, not shown here, without the latch (1) with its sliding surface (9) against the strike plate located in the door frame needs to be pressed; to push the trap into the lock, and thus without increased effort.

Only a few millimeters before the door reaches the locked position in the door frame the stop (10) of the leaf spring (4) is pressed against the strike plate and back. This simultaneously removes the locking edge (7) from the front edge of the latch (1) pushed back so that the Palle (1) is now unhindered in the opening in the Striker plate can snap forward, the latch (1) with its recess (3) over the leaf spring (4) slides (Fig. 5).

This functional representation shows that the installation of this Leaf spring (4) in the door lock allows the door to close easily and unhindered can go.

In addition, another measure leads to the reduction of the closing noises. Usually, inside a lock, the latch (1) is in the area of the latch angle (11) passed through two studs (12 + 13) riveted to the lock plate (5). When the latch (1) rushes forward, the latch bracket (11) strikes hard against the nut arm (14) and thereby generates another closing noise. This noise becomes essential reduced if the trap path is dimensioned so that the trap angle (11) the nut arm (14) can no longer 'touch' when rushing forward. This is done on the trap (1) above of the latch bracket (11) a stop (15) is provided. The cleat (13) is designed in such a way that that here a damping buffer fer (16) made of rubber or plastic can be arranged, against which the trap (1) is then damped with the stop (15) beinrjBDTS-fast can strike.

The possibility of having a noise-reducing device also on already Fig. 6 shows how to attach existing doors. Here, a door leaf (17) is installed with Lock ((18) shown in the area of the latch (19). On the door stop (20) is a slightly angled leaf spring (21) screwed on with the screws (22). When closed Door lies down, the leaf spring (21) lies smoothly in the gap between the door stop (20) and the door frame, not shown here. Is activated by pressing the door handle the door is opened, the latch (19) is pulled back into the lock (18), the leaf spring (21) stands up a little and holds the latch (19) in the retracted position. Only when closing the door, when the leaf spring (21) at the end of the closing path of the Door is pressed against the door frame, the trap (19) can be described above Way to its closed position (Fig. 7).

It should also be mentioned that the device for locking the trap with the door open in the version described, only with rebated door leaves can be used. Such Doors will be predominant anyway A device is used for the less frequently used butt-closing doors also possible to lock the latch, but much more complex. Such Doors have only one door hinge, which is also unfavorable for triggering a lock lies. The device must be guided around above and / or below the trap in order to be able to take effect when the attack occurs.

Claims (4)

P a t e n t a n s p F 'ii c h e Device for reducing closing noises when closing characterized by doors that the lock latch is in the position in which it is when opening the door by the depressed door handle is located, by a springy Movable lock is held, the Entsnerrunlr when closing the door through the pressure exerted on the lock by the door leaf when the door is closed takes place in such a way that the trap is released and engages in the strike plate opening. 2) Device according to claim 1, characterized in that one to the lock plate 5 attached leaf spring 4 with the locking edge 7 the trap 1 holds in the retracted state, and that the stop when the door is closed 10 of the leaf spring 4 at the time of movement against the strike plate in the door frame the Palle 1 releases. 3) Device according to claim 1, characterized by the arrangement a slightly angled leaf spring 21 in the area of the latch 19 on the door leaf 17 in the rebate 20, which holds the latch 19 in the retracted position when the door is open and when closing the door by pressing on the angled part of the leaf spring 21 releases the trap 19. 4) Device according to claims 1 to 3, characterized in that that above the trap bracket 11 guided by the studs 12 and 13 there is a stop 15 and between this and the cleat 13 a damping buffer 16 is provided. Blank page