Printer Cartridge Elastic Member Stabilizes Sealing Film Tear
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Solution Overview
Problem
Ink jet printers face issues with ink leakage due to the shifting tear position of the sealing film during the insertion of the ink lead-out member, leading to incomplete suppression of ink leakage problems.
Innovation Solution
A printer design featuring a cartridge holder with a needle tube, an annular protrusion, and an elastic member that changes the relative positional relationship between the needle tube and the protrusion upon deformation, ensuring the sealing film is stretched uniformly and torn at a stable position to prevent ink leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the ink lead-out member has a narrowed tip end to tear the sealing film, then the film can be torn to allow ink flow, but the tear position shifts when the film deflects, causing long torn pieces to enter the ink lead-out port
Solution Approach 1:
A guide member is introduced as an intermediary component between the ink lead-out member and the sealing film. The guide member has a guide portion that guides the tip end of the ink lead-out member along the sealing film surface, ensuring the tear starts at a predetermined position. This mediator controls the tearing process and prevents the film from deflecting uncontrollably, thereby preventing long torn pieces from entering the ink lead-out port while maintaining reliable ink flow.
2Reliability
If the sealing film is stretched uniformly to stabilize the tear position, then ink leakage is prevented, but the structural complexity increases with additional components
Solution Approach 1:
The guide member is installed in advance on the ink lead-out port before the ink lead-out member is inserted. The guide portion is pre-positioned to contact and guide the tip end of the ink lead-out member along the sealing film. This preliminary arrangement ensures that when the ink lead-out member is inserted, the tearing action automatically occurs at the correct position without requiring additional control mechanisms during the insertion process, thus stabilizing the tear position with minimal added complexity.
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 effectively stabilizes the tearing of the sealing film, preventing ink leakage by ensuring the needle tube contacts the film at a consistent position, thus maintaining liquid tightness and preventing torn film pieces from entering the ink lead-out port.
Implementation Method 1
an elastic member configured to be deformed by an external force in a direction from a tip end to a base end of the needle tube, in which the elastic member changes a relative positional relationship between a tip end position of the needle tube and a tip end position of the protrusion
Data Source
AI summary
A printer includes a cartridge is mounted in a cartridge holder, an needle-tube having an ink flow path, an protrusion disposed around the needle-tube as viewed from an axial direction of the needle-tube, and an elastic-member configured to be deformed in a direction from a tip end to a base end of the needle-tube, in which the elastic-member changes a relative positional relationship between a tip end position of the needle-tube and a tip end position of the protrusion from a first state in which the tip end position of the protrusion is located further away from the base end of the needle-tube than is the tip end position of the needle-tube, to a second state in which the tip end position of the protrusion is closer to the base end of the needle-tube than is the tip end position of the needle-tube upon being deformed by an external force.