Laser ranging device and automatic cleaning device
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Solution Overview
Problem
Laser ranging devices often fail due to dust accumulation and water ingress, which can lead to reduced accuracy and damage to circuit boards, as they are not adequately waterproof or dustproof.
Innovation Solution
The design incorporates an encoded chassis with a rotary bin and ranging teeth, a rotatable rotary disc, and barrier rings to create a waterproof and dustproof environment, using a combination of barrier rings and water-dust-proof walls to prevent dust and water from entering the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the laser ranging device is designed without barrier rings, then the structure is simpler and easier to manufacture, but dust and water can enter the device causing measurement failure or circuit board damage
Solution Approach 1:
The device is divided into multiple sealed compartments using barrier rings. The first barrier ring is disposed on the rotary disc at the edge of the bottom surface, and the second barrier ring is disposed on the encoded chassis at the periphery of the ranging teeth. These segmented barriers create isolated zones that prevent dust and water from reaching internal components, thereby improving reliability without requiring a complete redesign of the entire device structure.
Solution Approach 2:
Barrier rings are introduced as intermediary protective elements between the external environment (dust and water sources) and the internal components (ranging teeth, rotary disc, circuit board). These intermediary structures act as physical mediators that block harmful substances while allowing the device to maintain its functional integrity and operational simplicity.
2Measurement precision
If dust accumulates on the ranging component, then the device can continue operating, but measurement accuracy is reduced
Solution Approach 1:
The barrier rings are installed in advance to prevent dust from reaching the ranging component in the first place. The first barrier ring on the rotary disc and the second barrier ring on the encoded chassis create a preliminary defensive barrier that stops dust particles before they can accumulate on the ranging teeth or rotary disc surface, thereby maintaining measurement precision without requiring post-contamination cleaning operations.
Solution Approach 2:
The waterproof and dustproof barrier structure is established during the manufacturing phase, creating a pre-protective environment for the ranging components. This preliminary protective action ensures that the ranging component operates in a clean environment throughout its service life, maintaining measurement accuracy without requiring periodic maintenance or cleaning interventions.
3Reliability
If water enters the laser ranging device, then the device structure remains simple, but the circuit board can short circuit or burn
Solution Approach 1:
The device structure is segmented into water-exposed external regions and water-protected internal regions using barrier rings. The first barrier ring on the rotary disc and the second barrier ring on the encoded chassis create distinct zones that allow the device to maintain simple external geometry while internally protecting the circuit board and other sensitive components from water ingress through straightforward segmented barriers.
Data Source
AI summary
The present disclosure relates to a laser ranging device. The laser ranging device includes an encoded chassis, a rotary disc, a first barrier ring on the rotary disc and/or a second barrier ring on the encoded chassis. The encoded chassis includes a rotary bin and a plurality of ranging teeth disposed at intervals on the periphery of the rotary bin. The rotary disc is mounted within the encoded chassis and is rotatable within the rotary bin when the rotary disc is driven. The first barrier ring is disposed at the edge of the bottom surface of the rotary disc and the second barrier ring is disposed at the periphery of the ranging teeth, and the first barrier ring is located at the periphery of the ranging teeth after the rotary disc is mounted to the encoded chassis.