Trigger Switch Lock Mechanism Simplification
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Solution Overview
Problem
Existing trigger switch lock mechanisms are complex, difficult to assemble, and prone to malfunction due to dust, with a large number of parts and a complicated structure.
Innovation Solution
A simplified trigger switch design featuring a switch body, operators, elastic members, and a lock mechanism with a movable lock member and holder, utilizing an inclined portion and fit portion to set the switch in an off state, and a spring to maintain the lock, with a dust-proof design to prevent malfunction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional lock mechanism with multiple parts is used, then the off-state can be locked, but the structure becomes complicated and difficult to assemble
Solution Approach 1:
The patent combines the lock member and holder into a unified structure where the lock member is movable within the holder. The unlock button directly actuates the lock member through a pushing portion, eliminating the need for separate complex linkages. This merging of components simplifies the overall structure while maintaining reliable locking functionality.
Solution Approach 2:
The lock member serves multiple functions: it acts as a locking element that can engage with the trigger's fitting portion, serves as a lever that pivots when the unlock button is pressed, and provides a pushing portion that directly interacts with the unlock button. This multi-functionality reduces the number of separate parts needed in the mechanism.
2Reliability
If a complex lock mechanism with many parts is used, then locking function is achieved, but assembly becomes difficult
Solution Approach 1:
By integrating the lock member and holder as a unified assembly with fewer discrete parts, the patent significantly improves ease of manufacture and assembly. The simplified structure with the movable lock member within the holder requires fewer assembly steps compared to traditional multi-component lock mechanisms.
3Reliability
If a traditional lock mechanism is used, then the trigger can be locked, but dust can enter and cause malfunction
Solution Approach 1:
The lock member is nested within the holder, creating a contained structure that protects internal components from dust and contaminants. The holder encloses the lock member's movement path, and the unlock button's pushing portion interacts with the lock member through this protected interface, preventing dust from entering the mechanism.
4Ease of operation
If the unlock button is provided outside the switch body, then the lock can be released, but the structure becomes more complex
Solution Approach 1:
The unlocking function is extracted as a separate operational element (unlock button) positioned outside the main switch body, allowing easy access for the user. However, the internal structure is simplified by having this external button directly actuate the lock member through a straightforward pushing motion, avoiding complex internal linkages.
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 reduces the number of parts, simplifies assembly, enhances reliability by minimizing dust entry, and maintains a secure off-lock state with reduced risk of damage from excessive force, ensuring high operability and durability.
Implementation Method 1
a first elastic member which urges the first operator in a first direction projecting from the switch body
Implementation Method 2
a second elastic member which urges the second operator in a second direction projecting from the switch body
Implementation Method 3
a third elastic member which urges the lock member in a third direction projecting from the holder
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A lock member 23 includes a fit portion 23b, an inclined portion 23a and a contacting portion 23c. The fit portion 23b is fitted with a projecting portion 14b of a trigger 14 to maintain an off-lock state. The inclined portion 23a is brought into contact with a shaft 15a of an unlock button 15 and moves the lock member 23 to release the off-lock state. The projecting portion 14b is slidable on the contacting portion 23c and maintains an on state.