UA73193C2 - Door lock - Google Patents

Abstract

A door lock, comprising a housing-like lock case (1) provided with a front plate (3) and including a hook bolt (4, 5, 6), which is movable between a locking and a releasing position by means of a key (9) of the lock or other force transmission element and comprises a linearly movable guiding part (5) and a separate hook part (6) turnably journalled on the end thereof and which is arranged in cooperation with a striking plate (14) in a door frame (13) so that in its locking position the hook part (6) of the hook bolt (4; 5, 6) is moved through an opening (14a) in the striking plate and is turned towards an inner surface (14b) in the striking plate. The hook bolt (4; 5, 6) comprises a pivot arrangement by means of which the hook part (6) is movable with regard to the guiding part (5) in the longitudinal direction of the front plate (3). In addition the lock case (1) includes a guiding groove (8; 8a, 8b) for guiding the pivoting point of the hook part (6) both in the longitudinal direction of the front plate (3) and in the direction of movement of the guiding part (5).

Description

plates As a result, the space required for the rotation of the hook-shaped part of the shutter can be reduced and the length of the protrusion of the shutter can be significantly reduced without reducing the reliability of the closing and the reliability of the device.

In practice, in this case, the hook-like part 6 of the shutter is attached to the guide part 5 with the possibility of turning with the help of a hinged finger 7, but this finger 7 can move in the guide slot beyond, which is located in the guide part and is extended in the longitudinal direction of the front plate 3. Additionally, the guide groove 8 in the lock body has two sections 8a and 86, which are stretched in different directions. The first section va is transverse at the same time to the direction of movement of the guide part 5 and the front plate 3. As a result, when the hook-shaped shutter is moved outward from the lock body, the hook-shaped part 6 simultaneously makes a certain turn in the direction of the time arrow relative to the guide part 5 (Fig. 3). The second section 860 extends in the direction of movement of the guide part 5, so that when the hook-shaped shutter is moved further, the part 6 moves simultaneously through the shutter opening 14a in the front plate and through the shutter opening 14a in the locking bar (the latter is not shown in Fig.4). Next, the hook-like part 6 can be turned by the hinged finger 7 in the direction counterclockwise relative to the part 5 into the locked position, which is carried out partly under the influence of gravity, and partly thanks to the guide surfaces bb on the hook-like part and 17 on the lock body, respectively (fig. 5 and 6 ).

According to the invention, the guide groove 8 in the lock body has, in addition, an elongated part 8c, which is extended to the top in the direction of the front plate C and which is usually separated from the section 3b by a connecting part 16, which is fixed on the lock body through the sheared parts 16ba. The parts 16ba have such dimensions that when a lifting force is applied to the lower edge of the hook-shaped part 6, for example, when you want to lift the door from the door hinges, the hinged finger 7 of the part 6 breaks the sheared parts 1ba when moving the finger 7 up as along the guide slot 5a in the guide part , and along the elongated part 8c of the guide groove in the lock body. This is illustrated in Fig. 7 and 8.

Moving the door to remove it from the hinges will be unsuccessful, since the hook-like part 6 has such dimensions relative to the opening 14a for the shutter in the locking bar that the design does not allow a sufficiently large upward movement. As a result of such a movement, the integral hook-shaped shutter is pinched by the cutout ba, which is made in part 6, and interacts with the upper edge of the hole Za in the front plate. The inclined surface of the cutout ba together with the hinge pin 7, the broken connecting part 16 and the slots 5a and all act as wedges on the hook-like part 6, and thus, there is no need for any other protective measures for this part (see fig. 9). As a result, the shutter can prevent damage to other internal elements of the lock, so the requirements for the strength of their parts can be reduced accordingly, and thus, for example, the cost of manufacturing the lock body itself can be reduced as well.

It should be noted that the hook-shaped shutter device according to the invention can be used in various housings, regardless of whether the movement of the shutter is performed directly by a key, a mechanism actuated by a key, or, for example, by an electric or electromagnetic device. In addition to the door, the lock can also be installed in other suitable places where locking is required, for example, hatch covers, swing doors, etc. The invention is not limited to the given embodiment and various modifications are possible within the limits specified in the claims. and. F, 14. H A nya 7 Her 4

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