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PLASTIC SCANDINAVIAN LOCK DESIGN

IP.com Disclosure Number: IPCOM000190448D
Publication Date: 2009-Nov-30
Document File: 5 page(s) / 317K

Publishing Venue

The IP.com Prior Art Database

Abstract

The present invention proposes a Scandinavian lock with plastic parts which is commonly used on fire panels to reset alarm condition during the incidence of fire. The present Scandinavian lock utilizes minimum number of parts and consequently the lock has a cost effective design.

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PLASTIC SCANDINAVIAN LOCK DESIGN

BACKGROUND

The present invention relates generally to Scandinavian locks, and more particularly to a cost effective design for a Scandinavian lock having same reliability as that of existing metal lock.

Around the middle of 19th century, the Scandinavian style locks were introduced and became a more secure alternative to the prevailing smokehouse and screw locks. The Scandinavian lock is used on fire panels to reset alarm condition during the occurrence of fire with a help of fireman key which is usually available with a fireman. The present field of Scandinavian locks primarily encompasses metal locks with springs and tumblers which involve intricate design and considerable complexity.

Further, the complexity of lock design results in manufacturing difficulties, greater expense, and time consumption during the assembly and mounting of locks. The metal locks are also prone to environmental degradation such as, rust and corrosion in certain hostile conditions. Further, the use of metal locks and keys in magnetically and electrically conductive environments is also disfavored in certain applications.

These problems are not been addressed before. In addition, conventional Scandinavian metal locks assembly is made of conventional machining process, which is time consuming and are with more number of parts. Thereby, causing high cost for production.

As a result of the limitations and problems related to the conventionally available Scandinavian metal locks, there is a need for a lock which provides a reliable level of security at low cost and with minimum number of parts to ease of assembly.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is an exploded view of an exemplary configuration of the plastic Scandinavian lock assembly in accordance with the present invention.

Figure 2 is an isometric view of an exemplary configuration of the plastic key switch barrel sub assembly in accordance with the present invention.

Figure 3 is an isometric view of an exemplary configuration of the plastic key switch housing in accordance with the present invention.

Figure 4.is an isometric view of an exemplary configuration of the plastic key switch barrel in accordance with the present invention.

Figure 5 is 2D cut section view of an exemplary configuration showing the collet geometry in accordance with the present invention.

Figure 6 is an isometric view(s) of an exemplary configuration of the plastic Scandinavian lock assembly in accordance with the present invention.

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DETAILED DESCRIPTION

The present invention proposes a cost effective design of the Scandinavian lock with minimum number of parts. These parts are made of plastic without compromising on reliability factors. The present lock also has a spring and ball assembly. As shown in figure 1, the plastic key switch housin...