Liquid Ejecting Head Flat Spring Contact Pressure
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Solution Overview
Problem
The existing liquid ejecting head fabrication process is inefficient due to the need for additional steps to fix conductive spring members, which can lead to abnormal deformation and compromised contact pressure during the incorporation of channel forming members into the main body, affecting the reliability of electric connections.
Innovation Solution
A liquid ejecting head design that incorporates a conductive flat spring with an abutment portion to deform resiliently across a second direction, ensuring secure contact pressure without abnormal deformation, allowing for simultaneous incorporation of the channel forming member and flat spring, enhancing fabrication efficiency and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the spring member is fixed to the channel forming member before incorporation, then the fabrication process requires additional fixing steps, but the spring member may interfere with the main body during incorporation causing abnormal deformation
Solution Approach 1:
The spring member is pre-fixed to the channel forming member before incorporation into the main body. This preliminary action allows the spring to be properly positioned and secured in advance, eliminating the need for additional fixing steps during assembly while ensuring reliable electric connection through the resilient contact mechanism
2Manufacturing precision
If the channel forming member is incorporated before the spring member is fixed, then the spring member can be fixed without interference, but an additional fixing step is required which degrades fabrication efficiency
Solution Approach 1:
The incorporation of the channel forming member and the fixing of the spring member are merged into a single integrated step. The spring member is pre-attached to the channel forming member, allowing both components to be installed simultaneously into the main body without requiring separate fixing operations, thus maintaining high fabrication efficiency while ensuring precise contact pressure
3Reliability
If the spring member is used to connect the channel forming member and main body, then electric connection is achieved, but the spring member may abnormally deform during incorporation affecting contact pressure
Solution Approach 1:
The spring member is designed with differentiated local properties: a resilient portion that can deform to absorb incorporation forces and prevent abnormal deformation, and a contact portion that maintains stable geometric shape to ensure reliable electric connection. This local quality differentiation allows the spring to simultaneously achieve deformation stability for connection reliability
4Reliability
If a conductive spring member is used for electric connection, then flexibility and contact pressure are achieved, but additional fixing steps are required which reduce fabrication efficiency
Solution Approach 1:
The spring member is pre-fixed to the channel forming member before incorporation into the main body. This preliminary action allows the spring to be properly positioned and secured in advance, eliminating the need for additional fixing steps during assembly while ensuring reliable electric connection through the resilient contact mechanism
Solution Approach 2:
The incorporation of the channel forming member and the fixing of the spring member are merged into a single integrated step. The spring member is pre-attached to the channel forming member, allowing both components to be installed simultaneously into the main body without requiring separate fixing operations, thus maintaining high fabrication efficiency while ensuring precise contact pressure
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
This configuration secures the required contact pressure for electric connections and improves the reliability of the liquid ejecting head while streamlining the fabrication process by eliminating the need for additional fixing steps, thus enhancing overall efficiency.
Implementation Method 1
a conductive flat spring that is fixed to the channel forming member and is brought into contact with the contact portion by a resilient restoring force in a case where the flat spring is deformed in a second direction crossing the first direction
Implementation Method 2
the flat spring is provided with an abutment portion that abuts on the main body so as to resiliently deform the flat spring in the second direction in a case where the channel forming member is incorporated to the main body in the first direction
Data Source
AI summary
There are provided a liquid ejecting head having a high fabrication efficiency and a high reliability of an electric connector, and a fabricating method for the liquid ejecting head. A direction in which a channel forming member is incorporated to a casing crosses a direction in which a flat spring is resiliently deformed. In incorporating the channel forming member, an abutment portion formed at the flat spring is allowed to abut on the casing, thus deforming the flat spring. The flat spring is brought into contact with an inside contact pad by a resilient restoring force of the flat spring.