Handle adjusting device, and floor scrubber
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Solution Overview
Problem
Existing floor washers lack the ability to adjust the handle angle steplessly, limiting user convenience and stability.
Innovation Solution
A handle adjustment device with a base, handle bracket, and locking mechanism that allows for stepless adjustment and secure locking at any desired angle, utilizing a sliding fit and rotating connection with a locking mechanism to stabilize the handle bracket relative to the base.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a pin and adjustment holes structure is used to lock the handle angle, then the handle can be locked at specific angles, but the adjustment angle is limited and cannot achieve stepless adjustment
Solution Approach 1:
The patent removes the traditional pin-and-holes locking structure and replaces it with a pressing mechanism that applies continuous pressure to press the base and handle bracket against each other. This extraction of the discrete locking elements enables stepless adjustment while reducing structural complexity.
Solution Approach 2:
The patent changes the locking mechanism from discrete positional parameters (pin in specific holes) to continuous pressure parameter (pressing force magnitude). By controlling the pressing force, the handle can be locked at any angle within the adjustment range, achieving stepless adjustment.
2Reliability
If a pin and adjustment holes structure is used, then the handle can be locked at specific positions, but it is difficult to control the fitting clearance and excessive clearance causes looseness
Solution Approach 1:
The patent transforms the discrete clearance control problem into a continuous pressure control problem. By adjusting the pressing force magnitude, the system can compensate for manufacturing tolerances and ensure consistent locking stability without requiring extremely tight fitting clearances.
Solution Approach 2:
The pressing mechanism pre-applies force to the base and handle bracket to eliminate clearance and prevent looseness before the handle is subjected to operational loads. This beforehand cushioning ensures reliable locking without requiring ultra-precise manufacturing.
3Ease of operation
If the handle bracket is rigidly fixed to the base, then the structure is simple, but the handle angle cannot be adjusted
Solution Approach 1:
The patent transforms the rigid fixed connection into a dynamic connection that can adapt between locked and adjustable states. The pressing mechanism allows the handle bracket to be firmly locked when needed while permitting free adjustment when the pressing force is released, achieving both adjustability and structural simplicity.
Data Source
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AI summary
This application proposes a handle adjustment device. The handle adjustment device comprises: a base (1); a handle bracket (2), wherein the handle bracket (2) is connected to said base (1) in a manner that it can swing relative to said base (1); and a locking mechanism (3), wherein the locking mechanism (3) is capable of switching said handle bracket (2) between a locked state and an unlocked state. When said handle bracket (2) is in the locked state, said locking mechanism (3) causes said base (1) and said handle bracket (2) to press against each other, so that said handle bracket (2) is locked to said base (1). When said handle bracket (2) is in the unlocked state, said base (1) and said handle bracket (2) are not pressed against each other, and said handle bracket (2) can rotate relative to said base (1). This application also relates to a floor washer.