POSITIVE-LOCKING BATTERY RETAINER

Publishing Venue

Motorola

Related People

Abstract

The retainer is designed and developed to ensure a secure battery attachment to the main housing, thereby preventing undesirable battery loss from a pager when the pager is struck or dropped. The retainer prevents unnecessary battery door disengagement during a sudden impact by reducing the stress concentration applied against the battery door.

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MOTOROLA Technical Developments Volume 11 October 1990

POSITIVE-LOCKING BATTERY RETAINER

by Swan S. Park

   The retainer is designed and developed to ensure a secure battery attachment to the main housing, thereby preventing undesirable battery loss from a pager when the pager is struck or dropped. The retainer prevents unnecessary battery door disengagement during a sudden impact by reducing the stress concentration applied against the battery door.

   Battery is held securely by its retainer when the main housing and the battery sleeve are interlocked by built-in grooves. (See Figure 1) Downward force applied on the battery and the retainer by the compression of helical contact spring provides additional security to both components. As a result of compression, tabs on the retainer are forced downward until they completely mate with the main housing's grooves.

   (1) A battery and retainer are assembled and inserted into the battery compartment of a pager. (2) While the re- tainer is pushed in and compressed, it is turned clockwise approximately 100 degrees with a thumb until the retainer's tabs are fully aligned with the main housing. (3) Once the operation is completed, battery door is slid on to wver the battery slot of the main housing, and at the same time making contact with battery's negative end.

Application

Positive-locking battery retainer is not limited to pager application. Any battery operated devices can benefit from this invention.

0 Motorola, Inc. 1990...