PROTECTIVE STRUCTURE OF METAL FITTING FOR CHAIN OF PORTABLE SMALL-SIZED ELECTRONIC COMPONENT

• Main Author: MIYAYAMA MANABU
• Format: Patent
• Language: English
• Published: 28.05.1999
• Edition: 6
• Subjects: CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS; PRINTED CIRCUITS; WIRELESS COMMUNICATIONS NETWORKS

PROBLEM TO BE SOLVED: To prevent a metal fitting mounted with a chain from being deformed in collision with a floor or the like and to prevent a front case or rear cases of the metal fitting from being broken when a radio selective-call receiver or the like is dropped, by a method wherein projection parts are projected on the periphery of the metal fitting projected on a case body and the projection lengths of the projection parts are formed longer than that of the metal fitting. SOLUTION: Projection parts 16 and 17, which are respectively provided with the chevron pattern plane, are projected on the side surface 15 of the rear case 3 on one side of rear cases 3 on both sides of a metal fitting 6 mounted with a chain. The projection length between the side surface 15 and the points of the projection parts 16 and 17 are respectively formed into the same projection length as that between the side surface 15 and the point of the metal fitting 6 or are formed slightly longer than the projection length between the side surface 15 and the point of the metal fitting 6. As a result, in the case where a radio selective- call receiver 1 is dropped drown or the like, the projection parts 16 and 17 collide or come into contact with a floor or the like earlier than the metal fitting 6, and prevent the metal fitting 6 from colliding or coming into contact with the floor or the like. Accordingly, a possibility that the metal fitting is deformed by a shock at the time of the collision with the floor or the like or a case body is broken is reduced.