Gripping Sleeve Segmentation for Hand Tool Stability
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Solution Overview
Problem
Existing hand tools lack stability during operation, as the gripping sleeve is prone to falling off due to insufficient structural design, particularly with short outer sleeves that are difficult to grip and lack effective abutment mechanisms, leading to unreliable engagement with the restricting member.
Innovation Solution
A hand tool design featuring a gripping sleeve with a tubular first sleeve, a movable second sleeve, an elastic member, and a restricting mechanism, including annular grooves and flanges, which provides stable engagement and prevents the sleeve from detaching, allowing for secure rotation and easy handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the outer sleeve is made short to reduce device complexity, then the structure becomes simpler, but the sleeve cannot be gripped by hand and cannot provide stable engagement
Solution Approach 1:
The gripping sleeve is divided into two separate sleeves: an outer sleeve and an inner sleeve. The outer sleeve provides the gripping surface for hand operation, while the inner sleeve contains the restricting mechanism. This segmentation allows each component to be optimized for its specific function without compromising the other.
Solution Approach 2:
The inner sleeve is nested within the outer sleeve, forming a compact structure. The inner sleeve moves relative to the outer sleeve within a receiving groove, allowing the restricting mechanism to be contained within the gripping sleeve assembly without increasing overall size or complexity.
2Ease of manufacture
If the outer sleeve is made short to simplify structure, then manufacturing is easier, but the sleeve cannot provide reliable abutment against the restricting member
Solution Approach 1:
The abutment function is separated from the gripping function. The inner sleeve's flange provides the abutment surface against the restricting member, while the outer sleeve provides the gripping surface. This segmentation ensures reliable abutment without requiring the outer sleeve to be long.
Solution Approach 2:
The inner sleeve acts as an intermediary between the outer sleeve and the restricting member. It transmits the abutment force from the restricting member to the outer sleeve assembly, providing reliable mechanical engagement without requiring direct contact between the outer sleeve and restricting member.
3Device complexity
If no receiving groove is provided between sleeves, then the structure is simpler, but the second sleeve cannot be stably guided and positioned
Solution Approach 1:
The inner sleeve is nested within the outer sleeve, with the inner sleeve's movement guided by the receiving groove formed between the sleeves. This nested arrangement with a guiding groove provides stable positioning without requiring additional external guide structures.
Solution Approach 2:
The receiving groove acts as an intermediary guiding structure between the inner and outer sleeves. It constrains the inner sleeve's movement path and ensures proper positioning during operation, while maintaining a compact integrated structure.
4Device complexity
If the gripping sleeve lacks a restricting mechanism, then the structure is simpler, but the sleeve may detach from the main body during rotation
Solution Approach 1:
The restricting mechanism uses a movable inner sleeve that can shift position relative to the outer sleeve. When the user grips the outer sleeve, the inner sleeve moves to engage the restricting member on the main body, dynamically adapting to the gripping action and ensuring reliable engagement during rotation.
Solution Approach 2:
The restricting mechanism is activated automatically by the user's gripping action. When the user grips the outer sleeve, the inner sleeve is pushed forward by the elastic member to engage the restricting member, without requiring separate manual activation. The mechanism serves itself through the natural gripping motion.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design enhances stability and usability by ensuring the gripping sleeve remains securely attached to the main body, allowing for reliable tightening and loosening operations without the risk of detachment, even when subjected to external forces.
Implementation Method 1
an elastic member, disposed around the first sleeve and abutting against and between the first sleeve and the second sleeve
Data Source
AI summary
A gripping sleeve is provided, including: a first sleeve, being substantially tubular and having at least one through hole; at least one restricting member, received in the through hole; a second sleeve, sleeved on the first sleeve and being movable relative to the first sleeve, the restricting member being abutted by the second sleeve and being controllably engaged within an annular groove of a body portion of a main body; an elastic member, disposed around the first sleeve and abutting against the first and second sleeves; a restricting mechanism, arranged on at least one of the first and second sleeves and located between the first sleeve and an outer circumferential face of the second sleeve. A hand tool is further provided, including the main body and the gripping sleeve.