Striker for electric or mechanical lock

Abstract

 A selvage for electric or mechanical lock with a pivot (7) for a pawl engagement system, comprising a rear fixing plate (2) in which two links (4) with through holes (5) are pivoted coaxially and independently. The holes (5) rotatably accommodate the ends of the pivot (7). The diameter of the ends (8) of the pivot (7) is smaller than the diameter of the holes (5), producing a mechanical play (9) that allows the pivot (7) to tilt its own axis with respect to the pivoting axis of the links (4).

Description

[0001] The present invention relates to a selvage for an electric or mechanical lock with a pivot for a pawl engagement system.

[0002] An example of an electric or mechanical lock with a pivot for a pawl engagement system is known from publication WO 02/059443 in the name of this same Applicant; said lock is constituted by two parts: a casing that is rigidly coupled to the leaf that is to be opened electrically, and a selvage with a pivot, which is fixed to the fixed structure against which the leaf abuts when closed.

[0003] The casing contains the electric elements that are designed to actuate other mechanical elements that close and open the lock. When the leaf is closed, a hook-shaped retention element surrounds the pivot, rigidly coupling the casing to it.

[0004] The selvage is constituted by a rear plate for fixing to the fixed structure, to which two links are pivoted, said links having, at their other end, respective aligned through holes that rotatably accommodate the ends of the pivot. In this manner, the pivot can rotate about its own axis and can oscillate over a short arc of a circle traced by the freedom of rotation of the two links with respect to the rear fixing plate.

[0005] The leaves on which this type of lock is normally installed are heavy, since they are in fact gates, main doors and the like; often the weight of these leaves, over time, deforms the hinges or more simply displaces them slightly. The leaf tilts as an immediate consequence. The tilt of the leaf causes the less than perfect mechanical coupling between the pivot (the selvage is installed so that the axis of said pivot is vertical) and the hook-shaped retention element, which has the same inclination as the leaf, since it is rigidly coupled thereto.

[0006] For leaf tilts that exceed the angular play allowed to the coupling between the hook-shaped retention element and the pivot, it becomes impossible to close the lock.

[0007] The aim of the present invention is to obviate the above-cited drawbacks and to meet the above-mentioned requirements, by providing a selvage for an electric or mechanical lock with a pivot for a pawl engagement system with which it is possible to close the lock even when the leaf is slightly tilted.

[0008] Within this aim, an object of the present invention is to provide a selvage that is simple, relatively easy to provide in practice, safe in use, effective in operation, and has a relatively low cost.

[0009] This aim and this object are achieved by the present selvage for an electric or mechanical lock with a pivot for a pawl engagement system, of the type that comprises a rear fixing plate in which two links with through holes are pivoted coaxially and independently, said holes rotatably accommodating the ends of said pivot, characterized in that the diameter of said ends of the pivot is smaller than the diameter of said holes, producing a mechanical play that allows said pivot to tilt its own axis with respect to the pivoting axis of said links.

[0010] Further characteristics and advantages of the invention will become better apparent from the detailed description of a preferred but not exclusive embodiment of a selvage for an electric or mechanical lock with a pivot for a pawl engagement system, with a pivot that is articulated according to the invention, illustrated by way of non-limiting example in the accompanying drawings, wherein:

Figure 1 is a perspective view of a selvage for an electric or mechanical lock with a pivot for a pawl engagement system according to the invention;

Figure 2 is a partially sectional front view of a selvage for an electric or mechanical lock with a pivot for a pawl engagement system according to the invention, with the pivot tilted;

Figure 3 is a front view of a selvage for an electric or mechanical lock with a pivot for a pawl engagement system according to the invention, with the pivot inclined in a direction that is alternative to the direction of Figure 2.

[0011] With particular reference to the figures, the reference numeral 1 generally designates a selvage for an electric or mechanical lock with a pivot for a pawl engagement system.

[0012] The selvage 1 is fixed to the wall or frame by means of the rear plate 2, which has holes 3 for anchoring by means of screws, screw anchors or the like.

[0013] Two links 4 are pivoted to the plate 2, respectively in an upper region and in a lower region along a same pivoting axis; said links are provided respectively with a through hole 5 in their free end, i.e., the one that lies furthest from the pivoting axis. The rear plate 2 has rotation stroke limits 6 that limit the movements of the links 4.

[0014] The pivot 7 is substantially cylindrical and has regions with a smaller diameter at its two ends 8; said narrower ends 8 engage in the holes 5 of the links 4, providing a play 9 by way of this coupling.

[0015] The pivot 7 is firmly retained inside the holes 5 as a consequence of the forcing of respective heads 10 that have a larger diameter than the holes 5, or by means of elastic rings, the heads 10 therefore constituting a shoulder.

[0016] The operation of the invention is intuitive: the pivot 7 can move parallel to itself and to the pivoting axis of the links 4 and can rotate about its own axis by way of the shape of the couplings of the links 4 with the plate 2 and of the pivot 7 with the links 4. The play 9 provided in the coupling of the pivot 7 to the links 4 further allows the pivot 7 to tilt its own axis with respect to the pivoting axis of the links 4.

[0017] The inclination of the pivot 7 allows the coupling of the pivot 7 to the electric or mechanical lock with pawl engagement system even when said lock is fitted on a tilted inclined leaf: the pivot 7, too, can in fact tilt in order to cope with the different angle of insertion in the lock produced by the tilt of the leaf.

[0018] It has thus been shown that the invention achieves the intended aim and object.

[0019] The invention thus conceived is susceptible of numerous modifications and variations, all of which are within the scope of the appended claims.

[0020] For example, in order to improve the coupling between the lock and the pivot 7, the pivot 7 can be cambered, said shape being suitable to constitute a guide for the engagement of the lock if said lock is tilted.

[0021] All the details may further be replaced with other technically equivalent ones.

[0022] In the described embodiments, individual characteristics, given in relation to specific examples, may actually be interchanged with other different characteristics that exist in other embodiments.

[0023] In practice, the materials used, as well as the shapes and the dimensions, may be any according to requirements without thereby abandoning the scope of the protection of the appended claims.

[0024] The disclosures in Italian Utility Model Application No. BO2002U000128, from which this application claims priority, are incorporated herein by reference.

[0025] Where technical features mentioned in any claim are followed by reference signs, those reference signs have been included for the sole purpose of increasing the intelligibility of the claims and accordingly such reference signs do not have any limiting effect on the interpretation of each element identified by way of example by such reference signs.

Claims

1. A selvage for electric or mechanical lock with a pivot for a pawl engagement system, of the type that comprises a rear fixing plate (2) in which two links (4) with through holes (5) are pivoted coaxially and independently, said holes rotatably accommodating the ends (8) of said pivot (7), characterized in that the diameter of said ends (8) of the pivot (7) is smaller than the diameter of said holes (5), producing a mechanical play (9) that allows said pivot (7) to tilt its own axis with respect to the pivoting axis of said links (4).

2. The selvage according to claim 1, characterized in that said pivot (7) is substantially cylindrical, its ends (8) having a smaller diameter and being suitable to be accommodated in said holes (5) of the links (4).

3. The selvage according to one or more of the preceding claims, characterized in that respective heads (10) mate on said ends (8), have a larger diameter than said holes (5) and are suitable to prevent the exit of the pivot (7) from said holes (5).

4. The selvage according to one or more of the preceding claims, characterized in that said pivot (7) has, at its center, a cambered region in order to provide a better coupling to said pawl system of the lock when said lock is tilted.

Drawing