Lancing Device Automatic Return Mechanism
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Solution Overview
Problem
Conventional lancing devices require manual operation to return the control member to its original position after lancet detachment, leading to increased complexity, size, and manufacturing cost when attempting to address this issue with additional return springs.
Innovation Solution
A lancing device with a housing, lancet holder, control member, and return member, where the return member, preferably a resilient compression spring, automatically returns the control member to its wait position after lancet retreat and detachment operations, using engagement portions and stoppers to facilitate movement and prevent contact, thereby reducing the need for additional parts and simplifying the structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an additional return spring is provided to automatically return the control member to its original position, then the ease of operation is improved, but the device complexity and number of parts increase
Solution Approach 1:
The return spring is designed to perform multiple functions: it returns the control member to its original position after lancet detachment operation, and also returns the control member after lancet retreat operation. This multi-functionality eliminates the need for separate return mechanisms for each operation, reducing overall device complexity while maintaining ease of operation.
Solution Approach 2:
The patent combines the return function for both lancet detachment and lancet retreat operations into a single return spring mechanism. By merging these two separate return operations into one unified mechanism, the device complexity is reduced while still providing automatic return functionality for both operations.
2Ease of operation
If an additional return spring is provided to automatically return the control member, then the ease of operation is improved, but the manufacturing cost increases
Solution Approach 1:
The return spring is designed to perform multiple functions: it returns the control member to its original position after lancet detachment operation, and also returns the control member after lancet retreat operation. This multi-functionality eliminates the need for separate return mechanisms for each operation, reducing overall device complexity while maintaining ease of operation.
3Ease of operation
If an additional return spring is provided to automatically return the control member, then the ease of operation is improved, but the size of the device increases
Solution Approach 1:
The return spring is designed to perform multiple functions: it returns the control member to its original position after lancet detachment operation, and also returns the control member after lancet retreat operation. This multi-functionality eliminates the need for separate return mechanisms for each operation, reducing overall device complexity while maintaining ease of operation.
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 allows for automatic return of the control member to its original position, reducing user effort and device complexity, while minimizing the number of parts and manufacturing costs, enhancing convenience and efficiency.
Implementation Method 1
a return member for returning the control member to the wait position after the lancet retreat operation has been performed and returning the control member to the wait position after the lancet detachment operation has been performed
Implementation Method 2
the return member includes a resilient member
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
By moving a control member (3) in a predetermined direction from a wait position, a lancing device (A) can perform a lancet retreat operation for retreating a lancet holder (2) to locate a lancet (9) at a predetermined retreated position and a lancet detachment operation for pushing out the lancet (9) forward of the lancet holder (2) after a lancing operation. The control member (3) returns to the wait position by action of a return member (7) both after the lancet retreat operation and after the lancet detachment operation. Thus, the lancing device (A) is convenient.