Backpack Vacuum Harness Adjustment Assembly Using Track and Actuator
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Solution Overview
Problem
Existing backpack vacuum cleaners often require full disassembly and reassembly for harness adjustments, and use multiple fasteners, making the process time-consuming and complex, especially when accommodating users with varying torso dimensions.
Innovation Solution
A harness adjustment assembly featuring a track with teeth and an actuator assembly, where the actuator moves along the track, allowing for height adjustment without disassembly, and a connection system with ribs and side rails that secures the track to the housing with minimal fasteners, facilitating quick and simple assembly and adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If known harness adjustment devices are used, then the harness can be adjusted to different heights, but the harness must be fully disassembled and reassembled each time it is adjusted
Solution Approach 1:
The adjustment device is made movable along a track with teeth, allowing the harness to be dynamically repositioned to different heights without disassembly. The locking tab engages with teeth at desired positions to maintain adjustment while the actuator enables easy movement between positions.
Solution Approach 2:
The adjustment mechanism is divided into separate components: a track with multiple teeth, a movable actuator assembly, and a locking tab. This segmentation allows the harness to be adjusted incrementally along the track without requiring complete disassembly of the harness structure.
2Reliability
If multiple fasteners are used to secure the harness adjustment device, then the device can be securely attached, but assembly time and complexity increase
Solution Approach 1:
Multiple traditional fasteners are extracted and replaced with a single locking tab mechanism that engages with teeth on the track. This reduces the number of fasteners from multiple bolts or screws to one simple tab that can be engaged and disengaged easily while maintaining secure attachment.
Solution Approach 2:
The locking tab serves as an intermediary element between the actuator assembly and the track. Instead of using multiple fasteners to directly secure the adjustment device, the locking tab mediates the connection by engaging with the teeth on the track, providing secure attachment with minimal hardware.
3Reliability
If multiple fasteners are used to secure the track to the housing, then the track is firmly attached, but assembly time and labor costs increase
Solution Approach 1:
Multiple fasteners for securing the track to the housing are extracted and replaced with a minimal fastener system. The track includes features such as ribs or engagement structures that work with corresponding features on the housing to secure the track with far fewer fasteners than traditional designs, thereby increasing assembly speed while maintaining firm attachment.
Data Source
AI summary
Harness adjustment assemblies for user-worn electrical appliances and connection systems for the same are disclosed. In one aspect, a system includes an electrical appliance including a housing defining a recess, a track removably connected to the housing within the recess, a harness adjustment assembly connected to the housing by the track, and a harness assembly configured to be worn by a user of the electrical appliance to facilitate carrying the electrical appliance. The harness adjustment assembly includes an actuator assembly movable and selectively repositionable along the track. The harness assembly is connected to the actuator assembly such that the harness assembly is selectively repositionable relative to the electrical appliance housing upon actuation of the actuator assembly.