Handheld Punching Device Synchronized Rotation Mechanism
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Solution Overview
Problem
Conventional handheld hole punches suffer from instability and mismatch issues due to independent and non-synchronous rotation of punch heads and dies, leading to reduced precision and potential damage.
Innovation Solution
A handheld punching device with a holding grip, operating grip, transmitting lever, punching seat, and punch units, where the punch head moves along a straight path through synchronized upper and lower penetrating holes, minimizing clearance and ensuring precise hole creation without manual alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the punch head and die are rotated manually and independently, then the device can accommodate various dimensions, but the movement becomes unstable and precision is reduced
Solution Approach 1:
The patent combines the punch head rotation and die rotation into a single synchronized rotation mechanism. The punch head and die are connected through a common rotation axis, ensuring that both components rotate simultaneously and synchronously, eliminating the independence that caused instability while maintaining the ability to accommodate various dimensions.
Solution Approach 2:
The patent employs a positioning mechanism that pre-aligns the punch head and die before the punching operation. The die is positioned in a fixed location, and the punch head is pre-positioned relative to it, ensuring that when the synchronized rotation occurs, the components are already in the correct relative position, thereby guaranteeing precision.
2Device complexity
If the punch head moves along an arcuate path, then the mechanism is simple, but the clearance between punch head and die increases and stability is reduced
Solution Approach 1:
Instead of having the punch head move along an arcuate path as in conventional designs, the patent inverts the approach by having the punch head move along a straight linear path. This is achieved by positioning the punch head and die such that their relative movement is linear rather than arcuate, thereby eliminating clearance and improving stability while maintaining mechanism simplicity.
3Device complexity
If independent rotation of punch heads and dies is used, then the device structure is simple, but mismatch occurs and damage to components results
Solution Approach 1:
The patent merges the rotation control of the punch head and die into a single synchronized rotation mechanism. Both components are connected through a common rotation axis, ensuring they rotate simultaneously and remain properly aligned throughout the punching operation, thereby eliminating mismatch and preventing damage while maintaining structural simplicity.
Data Source
AI summary
A handheld punching device includes an operating grip pivotably connected to a holding grip to have a loading end turned in an up-down direction, a transmitting lever pivotably connected to the loading end to transmit a torque to turn a driving end, a punching seat pivotably connected to the holding grip and defining a cutting space for receiving a workpiece to be punched, and a plurality of punch units disposed between the driving end and the punching seat and each having a punch head movably and fittingly disposed in the punching seat along a straight path in the up-down direction, and a press head in abutting engagement with the driving end to be moved by the torque and to drive movement of the punch head through the cutting space for creating a hole in the workpiece.