Water Sprayer Grip with Replaceable Back Fitting
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Solution Overview
Problem
Conventional water sprayers experience discomfort and maintenance issues due to wear out of the back grip fitting portion, which is formed by injection molding and cannot be replaced, leading to friction and reduced grip effectiveness over time.
Innovation Solution
A grip structure with a back grip fitting portion that includes a fitting piece with a larger diameter engaging portion and a fixing structure on the grip body, allowing for easy dismounting and replacement, featuring a tenon and limiting column for secure engagement, and can be made of metal for durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the back grip fitting portion is formed by injection molding, then the manufacturing process is simple and cost-effective, but the portion is easily worn out by friction from the hand
Solution Approach 1:
The grip body is divided into separable components: the main grip body and the back grip fitting portion. This segmentation allows the back grip fitting portion to be made of wear-resistant material while keeping the main body simple, and enables independent replacement of the worn portion without replacing the entire grip body.
Solution Approach 2:
The material parameter of the back grip fitting portion is changed from standard injection molding material to metal material, which has superior wear resistance and friction resistance. This parameter change directly addresses the wear issue while maintaining manufacturing feasibility through metal forming processes.
2Device complexity
If the back grip fitting portion is formed by injection molding, then the structure is integrated and simple, but the portion cannot be dismounted and replaced for maintenance
Solution Approach 1:
The grip body is segmented into the main grip body and the back grip fitting portion connected by a detachable connection structure. This segmentation enables the back grip fitting portion to be removed and replaced for maintenance, while the connection structure keeps the overall design relatively simple.
Solution Approach 2:
The connection between the back grip fitting portion and the grip body is designed to be dynamic rather than fixed. The detachable connection structure allows the portion to be easily assembled and disassembled, transforming from a static integrated structure to a dynamic configurable structure that facilitates maintenance.
3Reliability
If the back grip fitting portion is made of metal, then the wear resistance and durability are improved, but the manufacturing complexity increases
Solution Approach 1:
Only the back grip fitting portion is made of metal, while the main grip body can remain as simpler material. This selective material application achieves wear resistance where needed without requiring the entire grip body to be manufactured from complex metal processes.
Solution Approach 2:
The metal material is applied locally to the back grip fitting portion where wear resistance is most critical, rather than throughout the entire grip body. This local quality approach optimizes performance at the critical interface while minimizing overall manufacturing complexity and cost.
Data Source
AI summary
A grip structure of water sprayer comprises a sprayer body, a grip body is extended downward from one end of the sprayer body, a front surface of the grip body is covered with a front grip fitting portion, a fixing structure is disposed on a back surface of the grip body, a back grip fitting portion is fitted on the back surface of the grip body. The back grip fitting portion has a fitting structure to be fitted and engaged with the fixing structure, so that the back grip fitting portion is fitted on the grip body. Accordingly, the back grip fitting portion of the present invention can be dismounted and replaced at will which is convenient for maintenance and usage.