Handheld Terminal Housing Bottom Cap Segmentation
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Solution Overview
Problem
Handheld computer terminals face challenges in balancing sealing, durability, ergonomics, and accessibility while maintaining cost efficiency, as existing designs often compromise one factor to optimize another, leading to issues like water ingress, corrosion, and labor-intensive repairs.
Innovation Solution
A housing design featuring a main body with a top cap and bottom cap, where the bottom cap includes a strap mount and electrical connector opening, allowing for improved sealing, durability, and ease of repair, with the bottom cap being replaceable and less cumbersome than traditional clamshell designs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a clamshell style housing with separate front and back housing members is used, then sealing and protection against pollutants is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The housing is divided into a main body and a separate bottom cap that can be independently removed. This segmentation allows the bottom cap to be accessed and replaced without dismantling the entire housing structure, reducing repair complexity while maintaining sealing protection through the integrated design of the bottom cap covering the bottom opening.
2Reliability
If the electrical connector is soldered to the housing member, then connection reliability is improved, but ease of repair deteriorates as the housing member must be discarded upon connector failure
Solution Approach 1:
The bottom cap is separated as an independent replaceable component from the main housing body. The electrical connector is mounted to the bottom cap, allowing the connector to be replaced by simply removing and replacing the bottom cap rather than dismantling the entire housing or re-soldering to a new housing member.
Solution Approach 2:
The design allows the bottom cap to be discarded and replaced as a low-cost component when the electrical connector fails, avoiding the need to discard expensive housing members while maintaining reliable electrical connections through the integrated mounting structure.
3Ease of operation
If the hand strap is mounted as a separate piece screwed or ultrasonically welded to the back housing member, then ergonomic function is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The hand strap mounting structure is integrated into the bottom cap as a unified component. The strap mount is formed as part of the bottom cap structure, eliminating the need for separate mounting operations such as screwing or ultrasonic welding, thereby reducing manufacturing complexity and cost while maintaining ergonomic functionality.
4Reliability
If the front housing member and back housing member must be dismantled to access and replace the electrical connector, then connection reliability is maintained, but productivity and repair efficiency decrease
Solution Approach 1:
The bottom cap is designed as a separately accessible component that can be removed from the main housing body without dismantling the front and back housing members. This allows technicians to quickly access and replace the electrical connector by simply removing the bottom cap, significantly improving repair efficiency while maintaining connection reliability through the integrated mounting design.
Data Source
Figure 1
Figure 2
AI summary
A bottom cap of a housing of a hand held computer terminal is provided. The bottom cap comprises a strap mount and a releasable fastener. The releasable fastener can releasably fasten the bottom cap to a main body of the housing. The strap mount comprises an electrical connector opening for mounting an electrical connector to the bottom cap.