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ASSEMBLY METHOD FOR A REMOTE SPEAKER MICROPHONE

IP.com Disclosure Number: IPCOM000008647D
Original Publication Date: 1998-Jun-01
Included in the Prior Art Database: 2002-Jul-01
Document File: 2 page(s) / 80K

Publishing Venue

Motorola

Related People

Marc Pullman: AUTHOR [+2]

Abstract

The Remote Speaker Microphone (RSM) is used in the portable two way radio business. The RSM incorporates a speaker, microphone and Push To Talk (PTT) switch. The RSM clips to the users shirt pocket or lapel area and has a cord which plugs into a portable two way radio usually worn on the belt. The RSM is a high volume accessory in the two way radio business and it is used in many harsh environments which require the design to be robust.

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MOTOROLA Technical Deve1opment.s

ASSEMBLY METHOD FOR A REMOTE SPEAKER MICROPHONE

by Marc Pullman and John St. Pierre

PRODUCT BACKGROUND

  The Remote Speaker Microphone (RSM) is used in the portable two way radio business. The RSM incorporates a speaker, microphone and Push To Talk (PTT) switch. The RSM clips to the users shirt pocket or lapel area and has a cord which plugs into a portable two way radio usually worn on the belt. The RSM is a high volume accessory in the two way radio business and it is used in many harsh environments which require the design to be robust.

THE PROBLEM

  The current RSM has been offered by Motorola for many years. The design includes ultrasonically welded threaded brass inserts used to assemble the front and rear housing as well as secure the clothes clip to the rear housing. These inserts can pull out of the housing and have failed for many of our customers. Also, a large amount of the customer failures involve the coil cord. The current design does not allow the coil cord to be easily replaced in the field.

  The greatest area for improvement was in the assembly method. The current design incorporates seven ultrasonically welded threaded brass inserts, ten screws, a metal plate used as a strain relief for

the coil cord and an assembly method which was diffUt and timely for the factory

THE SOLUTION

  Customers have historically been pleased with the performance of the current RSM. In order to maintain the same level of performance, th...