Protective identifying shield and protected instrument case

Details Protective identifying shield and protected instrument case Protective identifying shield and protected instrument case

G - Physics

12

B

G12B 9/02 (2006.01) G12B 17/00 (2006.01) H05K 5/02 (2006.01) H05K 9/00 (2006.01)

Patent

CA 2116055

An encased electronic instrument of the type having a front panel bearing controls and visual displays that is clamped to the forward periphery of a box-like case, is provided with a resiliently deformable and elastically stretchable identifying shield surrounding and overlying the front panel, and extending a given distance rearwardly generally parallel to the outer surface of the instrument case. The shield is preformed, with an outer peripheral band defining an open center having a shape slightly smaller than, but generally conforming to the outer shape of the front panel and the rearwardly extending outer surfaces immediately adjacent to the front panel. A first inwardly extending flange projects from the forward edges of the peripheral band in overlying relationship with the outer edges of the front panel of the instrument, and a second inwardly extending flange projects from the rearward edges of the peripheral band to enhance frictional engagement between the band and the underlying outer surfaces of the instrument. The second inwardly extending flange may also serve to retain the shield on the front panel and to provide sealing between the panel and the case, by being clamped between the rear surface of the front panel and the forward edges of the side surface portions of the case, replacing the sealing gasket previously described as being used in the prior art. The material from which the shield is formed is resiliently deformable and elastically stretchable, so that it can be stretch-fitted over the front panel of an instrument in peripheral elastically gripping relationship; the thickness of the body of the shield is selected so that the force of unintended impacts with the outer surface of the shield will be absorbed in part in the shield and will be transmitted in part to the abutting surface of a panel in which the instrument is mounted, and will also be transmitted, with reduced intensity, to the outer surface of the instrument. The shield also serves to provide convenient and ready visual differentiation among a plurality of clustered instruments, as in a control board, through the use of distinctive colors which may be applied to the surface of the shield or which may be made an inherent part of the shield material. Visual identification is further enhanced by molding distinctive words or symbols into a visible surface of the shield.

Instrument électronique sous coffret avec panneau de commande et dispositif d'affichage visuel fixé par pincement au bord antérieur du coffret; une enveloppe protectrice flexible, déformable et étirable recouvre le panneau, débordant vers l'arrière et parallèlement au coffret abritant l'instrument. L'enveloppe protectrice est préformée et comporte une bande périphérique définissant une partie centrale ouverte dont la forme, plus petite, s'apparente à la configuration extérieure du panneau avant et des surfaces adjacentes au panneau. Un rebord en projection vers l'intérieur à partir de la bande périphérique se superpose aux bords extérieurs du panneau de l'instrument; un deuxième rebord en projection vers l'intérieur depuis les bords postérieurs de la bande périphérique accroît la cohésion frictionnelle entre la bande et les surfaces sous-jacentes de l'instrument. Le deuxième rebord en projection vers l'intérieur peut aussi servir à retenir l'enveloppe protectrice sur la surface du panneau et assurer l'étanchéité entre le panneau et le coffret par pincement entre la surface arrière du panneau et les bords antérieurs du coffret, remplaçant ainsi le joint d'étanchéité décrit plus haut et utilisé antérieurement. Le matériau utilisé pour la fabrication de l'enveloppe protectrice est déformable et étirable, ce qui permet sa mise en place par étirement et lui confère des propriétés de retenue élastique; l'épaisseur donnée à l'enveloppe protectrice permet l'absorption partielle des impacts et la transmission de la force des impacts au coffret. L'enveloppe protectrice favorise également la différenciation visuelle d'une pluralité d'instruments par l'utilisation d'une pluralité de couleurs distinctives appliquées à sa surface ou intégrées dans l'épaisseur de l'enveloppe. La différenciation visuelle est accrue par le moulage de mots-clés ou de symboles dans la portion visible de la surface de l'enveloppe.

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