Manual Clamp with Dual Spring System for Key Making
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Solution Overview
Problem
Conventional key making machines face difficulties in securely holding the master key during imaging and cutting processes, often resulting in misalignment and excessive user effort due to insufficient clamping force.
Innovation Solution
A manual clamp with a stationary head guide, pressure pad, and dual spring system, along with a plunger and release lever, provides continuous and adjustable clamping force to securely hold the key, reducing misalignment and user effort through a mechanical advantage mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the door clamp is designed to exert sufficient downward force on the master key, then the key security during imaging is improved, but the effort required to raise the door clamp becomes excessive for users
Solution Approach 1:
The clamp transitions from a static spring-biased design to a dynamic system with two adjustable springs. The first spring provides continuous baseline clamping force, while the second spring connected to the plunger allows temporary force enhancement. This dynamic adjustment resolves the contradiction by enabling sufficient clamping force during imaging while reducing the effort needed to raise and lower the clamp through the plunger mechanism.
Solution Approach 2:
The invention changes the force parameter by introducing a dual-spring system with different spring constants and pre-loads. The first spring (k1) provides a baseline force, while the second spring (k2) adds temporary force when compressed by the plunger. This parameter change allows the clamp to exert sufficient force on the key during imaging without requiring excessive user effort to operate, as the springs store and release energy to assist the user.
2Ease of operation
If the door clamp is raised for key insertion, then key accessibility is improved, but the risk of key misalignment and mishandling increases
Solution Approach 1:
The first spring is pre-loaded to provide continuous downward bias on the pressure pad even when the clamp is in the raised position. This preliminary action ensures that as soon as the key is inserted into the slot, it is immediately engaged by the biased pressure pad, preventing misalignment and mishandling before the clamp is fully lowered and the second spring is engaged.
3Device complexity
If a single spring system is used for clamping, then the device complexity is reduced, but the ability to provide both secure clamping and easy operation is compromised
Solution Approach 1:
The clamping function is segmented into two independent spring systems: the first spring handles continuous baseline clamping, while the second spring handles temporary force enhancement during operation. This segmentation allows each spring to be optimized for its specific function, resolving the contradiction by providing both secure clamping and easy operation without excessive complexity, as each spring serves a distinct purpose.
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 clamp ensures secure key alignment and reduced user effort during imaging and cutting processes, minimizing mis-cuts and improving the overall usability of the key making machine.
Implementation Method 1
at least a first spring configured to continuously generate a force biasing the pressure pad toward the stationary head guide
Implementation Method 2
a second spring configured to bias the plunger toward the pressure pad
Data Source
AI summary
A clamp is disclosed for use in a key making machine. The clamp may have a stationary head guide with a slot configured to receive a key, and a pressure pad configured to engage the head guide and sandwich the key therebetween. The clamp may also have at least a first spring configured to continuously generate a force biasing the pressure pad toward the stationary head guide, a plunger configured to selectively engage the pressure pad, and a second spring configured to bias the plunger toward the pressure pad. The clamp may further have a release lever manually operable to urge the plunger away from the pressure pad and to compress the second spring.