Locking fastener for enclosure cover

• US 5,704,660 A
• Filed: 03/13/1996
• Issued: 01/06/1998
• Est. Priority Date: 03/13/1996
• Status: Expired due to Term

• Current Assignee: Blackberry Limited
• Original Assignee: Ericsson, Inc. (Telefonaktiebolaget LM Ericsson)
• Inventors: Smith, Stacy Neil
• Primary Examiner(s): Lindsey, Rodney M.
• Application Number:
  US08/615,715
• Time in Patent Office: 664 Days
• Field of Search: 292/87, 292/80, 292/DIG. 38, 292/DIG. 55, 292/219
• US Class Current: 292/80
• CPC Class Codes: H04M 1/0249 Details of the mechanical connection between the housing parts or relating to the method of assembly
• CPC Class Codes: H04M 1/0262 for a battery compartment
• CPC Class Codes: Y10S 292/38 Plastic latch parts
• CPC Class Codes: Y10T 292/0894 Spring arm

Abstract

A locking fastener for an enclosure cover includes base and cover components. The base includes a pair of L-shaped flanges disposed on an internal surface of the base and a notch formed in the internal surface of the base. The cover includes a plate beam having ends that engage the L-shaped flanges of the base when the cover is assembled with the base. The plate beam also includes a tab that forcibly engages the notch in the in base when the cover is assembled with the base. The locking cover arrangement provides an economical and effective arrangement for permanently securing a cover over an opening.

Claims

1. A locking fastener arrangement, comprising:

a base having a predefined first surface defining a portion of an enclosure and a pair of L-shaped flanges spaced from each other in substantially parallel relationship at a predetermined first distance, each of said flanges having a first wall extending in a substantially perpendicular di second wall integrally connected to a distal end of each of the first walls and extending respectively from each of said first walls in substantially parallel spaced relationship with said first surface at a predetermined second distance and in a direction toward each other and having respective distal ends spaced apart from one another at a predetermined third distance, and an inwardly extending notch disposed at a predefined position on said first surface;

a cover adapted for attachment with said base and having a predefined second surface cooperating with said first surface of the base to substantially define an enclosure when the cover is attached to the base, a pair of struts each of which extend from said second surface of the cover at a spaced apart distance less than said predetermined third distance between the distal ends of the second walls of the L-shaped flanges of the base and each of said struts having a distal end spaced from said second surface of the cover at a distance substantially equal to the predetermined second distance at which said second walls of the L-shaped flanges of the base are spaced from said predefined first surface of the base, and a plate beam having an intermediate portion rigidly attached to the respective distal ends of the struts whereby said plate beam is spaced from said second surface of the cover, a pair of cantilevered end portions respectively extending from the intermediate portion and extending beyond the supporting distal ends of said struts, a length substantially equal to the predetermined first distance at which said first walls of the L-shaped flanges of the base are spaced apart, a thickness substantially equal to the predetermined second distance at which said second walls of the L-shaped flanges of the base are spaced from said predefined first surface of the base, a face surface facing outwardly from the predefined second surface of the cover at a distance sufficient to provide abutting contact of said face surface of the plate beam when said cover is attached to said base, and a tab extending outwardly from said face surface of the plate beam and disposed at a position sufficient to forcibly engage said inwardly extending notch disposed on said predefined first surface of the base when said cover is attached to said base.

2. A locking fastener arrangement, as set forth in claim 1, wherein said base comprises a frame for a cellular telephone, and said cover comprises an antenna housing cover adapted to mate with said frame.

3. A locking fastener arrangement, as set forth in claim 1, wherein said cover is attachable to said base in response to slidably engaging the cantilevered ends of the plate beam between the first surface of the base and the second wall spaced from said base, and is securely locked in said attachment by engagement of the tab on the face surface of the plate beam into said inwardly extending notch disposed on the first surface of the base.

4. A locking fastener arrangement, as set forth in claim 1, wherein when said cover is attached to the base, said tab on the face surface of the plate beam is disengagable from said inwardly extending notch disposed on the predefined first surface of the base in response to bending a portion of said plate beam disposed between said cantilevered ends of the plate beam in a direction away from said predetermined first surface of the base.