Angle Adjustable Hand Tool Control Device
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional angle adjustable hand tools require extra parts and complex assembly processes, and face manufacturing difficulties due to the need for a large button area, which can lead to breakage during small-scale production.
Innovation Solution
A compact control device with a handle featuring axially defined holes for springs and a button with a recess, where the pawl is removably engaged with the driving head, allowing for easy assembly and operation by pivoting the driving head relative to the handle using a button mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a positioning plate and spring are added to prevent the driving head from falling, then the driving head stability is improved, but the device complexity increases
Solution Approach 1:
The patent combines the positioning plate and spring into an integrated spring-loaded positioning structure where the spring is housed within the positioning plate itself. This merging of components reduces the number of separate parts and simplifies the assembly process while maintaining the function of preventing the driving head from falling suddenly during angle adjustment.
Solution Approach 2:
The spring is nested within the positioning plate structure, with the spring housed inside a cavity formed in the positioning plate. This nesting arrangement allows the spring mechanism to be contained within the existing positioning plate geometry, reducing overall component count and simplifying assembly while preserving the shock-absorbing and positioning functions.
2Ease of operation
If a hole is drilled in the center of the button to accommodate a connection member, then the button functionality is improved, but the manufacturing difficulty increases
Solution Approach 1:
The patent removes the connection member from the button structure entirely. Instead of drilling a hole through the button to accommodate a connection member, the design extracts this function and implements it through the pawl's engagement with the driving head's teeth. The button becomes a simple actuating element without through-holes, making it easier to manufacture and less prone to breakage during small-scale production.
3Volume of moving object
If the button area is reduced for small-scale manufacturing, then the device compactness is improved, but the button strength decreases
Solution Approach 1:
By removing the through-hole and connection member from the button, the patent eliminates the stress concentration points that would weaken a small button. The button can now be made compact without requiring large areas, as the structural integrity is maintained through the absence of drilling operations and the redistribution of mechanical loads through the pawl mechanism rather than through the button material itself.
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 solution simplifies assembly, reduces part count, and prevents the driving head from falling, while enabling smooth angle adjustments with a compact design suitable for small-scale manufacturing.
Implementation Method 1
a spring and a positioning plate at the front end of the adjusting member
Implementation Method 2
the pawl supports the driving head when the adjusting member is disengaged from the teeth of the driving head
Data Source
AI summary
An angle adjustable hand tool includes a driving head pivotably connected to a handle and a pawl is received in the handle and removably engaged with the teeth in the driving head. A button is engaged with a hole in the handle and perpendicularly communicates with the hole in which the pawl is received. The button includes a recess and a second contact surface connects the recess. When the button is pushed, the pawl is located in the recess of the button so that the driving head can be pivoted relative to the handle. The driving head is set when the pawl is engaged with the teeth of the driving head.