EP2578777A1

EP2578777A1 - Lock arrangement

Info

Publication number: EP2578777A1
Application number: EP12185995.3A
Authority: EP
Inventors: Peter Nabb
Original assignee: Abloy Oy
Current assignee: Abloy Oy
Priority date: 2011-10-06
Filing date: 2012-09-26
Publication date: 2013-04-10
Anticipated expiration: 2032-09-26
Also published as: FI20115978A0; FI20115978A; RU2615948C2; RU2012142680A; FI125354B; EP2578777B1

Abstract

The invention prevents the pushing of a manipulation means inside a lock body (1). In the embodiment according to the invention, there are projections (6, 8) both on the side of the bolt (3) and on the side of the lock body at the site of the bolt hole (4). The projections (6, 8) face towards each other and settle against each other at least then, when the bolt (3) is extended from the lock body (1).

Description

Technical field

This invention relates to a lock, which can typically be installed in a door. In particular, the invention relates to the lock body and bolt of the lock.

Prior art

It is known that a lock comprises a lock body and a front shield on the front side of the lock. The front side is the side of the lock, which remains in sight, when the lock is installed. The front shield has a hole for the bolt and possibly also for the control wedge, as well as for the function mode selector of the lock. In addition, the front shield comprises holes for attachment elements, such as screws.
Attempts are made to manipulate locks to open it in an abnormal manner, i.e. in practice, an attempt is made to open the lock by means other than using a key. One manner of manipulation is to use a thin metal strip, which is pushed inside the lock body from the gap between the edge of the bolt hole on the front shield and the bolt. Using a metal strip that has been pushed inside, an attempt is made to manipulate the deadbolt elements of the bolt to open the lock, wherein the bolt is free to shift inside the lock body.
One known means of preventing/hampering the penetrating of a metal strip is to form a recess to the side surface of the bolt. In this case, the metal strip penetrating into the lock body stops at the recess, nor is it free to advance deeper into the lock body. Although this solution prevents manipulation of the lock relatively well, it can be possible that a metal strip does not stop at the recess of the bolt.

Brief description

The object of the invention is to provide a solution, which prevents manipulation of a lock body through the bolt hole more effectively in comparison to known solutions. The object is achieved in the manner presented in the independent claim. The dependent claims present various embodiments of the invention. The idea of the invention is that a metal strip to be pushed inside the lock body is not free to advance into the lock body, even if it were to receive support from the side surface of the bolt or the side surface of the lock body. Advance of a metal strip or other strip pushed freely into the edge of the bolt or bolt hole is also prevented in the invention. In the embodiment according to the invention, there are projections both on the side of the bolt and on the side of the lock body. The projections face towards each other and settle against each other at least then, when the bolt is extended from the lock body.

List of figures

In the following, the invention is described in more detail by means of the accompanying figures, in which

Fig. 1: shows an example of a lock arrangement according to the invention,
Fig. 2: shows a detail of the example of Fig. 1,
Fig. 3: shows an example of an embodiment according to the invention in a sectional view,
Fig. 4: shows another sectional view of the example of Fig. 3, and
Fig. 5: shows another example of another embodiment according to the invention.

Description

Fig. 1 shows an embodiment of a lock arrangement according to the invention, comprising a lock body 1, front shield 2 and bolt 3. The front shield comprises a bolt hole 4, through which the bolt 3 is moveable outwards from the lock body. When the lock is installed, for example, in a door and the bolt is in the exterior position, the bolt locks the door into the frame structure of the door acting as the counterpart of the door. When the bolt is not deadlocked, the bolt is free to shift inside the lock body, i.e. the door can be opened. As can be observed from the example of Fig. 1, the lock body can also comprise a control wedge 2C, a function mode selector 2D of the lock and holes 2E for attachment elements. The front shield 2 of Fig. 1 is shown in cross-section on the other side of the bolt hole 4, in order that the features of the invention can better be seen.
Fig. 2 shows more specifically details of the embodiment of Fig. 1. At least the other side 5 of a lock body according to the invention comprises a first projection arrangement 6 facing towards the side surface 7 of the bolt, immediately behind the front shield 2 at the site of the bolt hole 4, more specifically, at the site of the edge of the bolt hole. The side surface 7 of the bolt comprises a second projection arrangement 8 facing towards the side 5 of the lock body. The projection arrangements 6, 8 settle against each other at least then, when the bolt 3 is extended from the lock body 1.
The first projection arrangement 6 of the embodiment shown in Figs. 1 and 2 comprises first projections 6 side-by-side in the vertical direction of the lock body 1, and the second projection arrangement 8 on the side surface 7 of the bolt comprises second side-by-side projections 8 in the vertical direction of the lock body. Directional line A shown in Fig. 1 illustrates the vertical direction of the lock body. The second projections settle between the first projections at least then, when the bolt 3 is in the extended position.
Because both the side surface 7 of the bolt and the side 5 of the lock body comprise a projection arrangement, which settle against each other, they efficiently prevent the penetrating of a metal strip inside the lock body. The metal strip is not free to advance along the side surface 7 of the bolt, the inside surface of the lock body of the side 5 of the lock body or freely in the gap between the edge of the bolt hole and the side surface of bolt, as it strikes against at least one or the other of the projection arrangements.
In addition, from the embodiment of Fig. 1, it can be observed that the first projections 6 are longitudinal projections in the longitudinal direction of the bolt 3. Directional line B shown in Fig. 3 illustrates the longitudinal direction of the bolt. However, the projections 6 of the side of the lock body do not need to be longitudinal, rather they can also be short in the longitudinal direction of bolt (for example, as long as their width), wherein they are then, as a whole, in the immediate vicinity of the front shield 2.
Fig. 3 shows a sectional view of the bolt 3 and the lock body 1. The bolt is often thicker at the tip part, which can be extended. The front surface of the bolt is generally also bevelled. The back part 3A of the bolt, which is inside the lock body, is ordinarily thinner, i.e. lighter in structure than the tip part 3 of the bolt. Thus, material is saved. The sectional view of Fig. 3 is taken of the side 5 of the lock body at the site of the projection 6. Fig. 2 shows a corresponding sectional view of the bolt 3 at the site of the projection 8. In Figs. 1, 2, 3 and 5, the bolt is in the extended position, into which it can be locked using the dead-bolting means of the lock (not shown in the figures).
Fig. 5 shows another embodiment according to the invention, in which the first projection arrangement 6A is the edge of the side 5 of the lock body against the back surface 2A of the front shield, which edge is bent. The edge is a longitudinal projection 6A in the vertical direction of the lock body. The projection faces towards the bolt 3 at the site of the bolt hole. The second projection arrangement 9 is also a longitudinal projection on the side of the bolt 3 in the vertical direction of the lock body.
Although Figs. 3, 4, and 5 show such embodiments, in which projection arrangements 6, 8, 6A, 9 are only on the longer side 7 of the bolt 3 and on its opposite side of the lock body, it is also possible that the projection arrangements are also on the other side 7A of the bolt and on the other side of the lock body. It is also possible that on the other side of the bolt is a projection arrangement according to Figs. 3 and 4 and on the opposite side of the bolt is a projection arrangement according to Fig. 5.
In addition, it is also possible that the projection arrangement 6A is the edge on the side 5 of the lock body against the back surface 2A of the front shield according to Fig. 5, but in which projections are side-by-side in the vertical direction of the lock body 1 at the site of the bolt hole, i.e. the bent edge 6A of Fig. 5 resembles a cogged edge (in the manner of Fig. 2). The second projection arrangement 8 in the bolt comprises second side-by-side projections in the vertical direction of the lock body according to Figs. 2 and 4.
In light of the examples described above, it is obvious that the invention can be implemented in various ways within the scope of the claims.

Claims

A lock arrangement, comprising a lock body (1), a front shield (2) and a bolt (3), which front shield comprises a bolt hole (4), through which the bolt (3) is moveable outwards from the lock body (1), characterized in that at least another side (5) of the lock body comprises a first projection arrangement (6, 6A) facing towards a side surface (7) of the bolt, immediately behind the front shield (2) at the site of the bolt hole (4), and which side surface (7) of the bolt comprises a second projection arrangement (8, 9) facing towards the side (5) of the lock body, which projection arrangements (6, 6A, 8, 9) settle against each other at least then, when the bolt (3) is extended from the lock body (1).
An arrangement according to claim 1, characterized in that the first projection arrangement (6) comprises first projections (6) side-by-side in the vertical direction of the lock body (1) and the second projection arrangement (8) comprises second side-by-side projections (8) in the vertical direction of the lock body, which second projections settle between the first projections at least then, when the bolt (3) is in the extended position.
An arrangement according to claim 2, characterized in that the first projections (6) are longitudinal projections in the longitudinal direction of the bolt (3).
An arrangement according to claim 1, characterized in that the first projection arrangement (6A) is the edge on the side (5) of the lock body against the back surface (2A) of the front shield, which edge has a longitudinal projection (6A) in the vertical direction of the lock body towards the bolt (3) at the site of the bolt hole and the second projection arrangement (9) is a longitudinal projection on the side of the bolt in the vertical direction of the lock body.
An arrangement according to claim 2 and claim 4, characterized in that on the other side (7, 7A) of the bolt is a projection arrangement according to claim 2 and on the opposite side (7, 7A) of the bolt is a projection arrangement according to claim 4.
An arrangement according to claim 1, characterized in that the projection arrangement (6A) is the edge on the side (5) of the lock body against the back surface (2A) of the front shield, which edge has projections side-by-side in the vertical direction of the lock body (1) at the site of the bolt hole towards the bolt, and the second projection arrangement (8) comprises second side-by-side projections in the vertical direction of the lock body towards the side of the lock body.