Cap Lever Mechanism for Liquid Ejection Apparatus
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Solution Overview
Problem
Existing liquid ejection apparatuses require users to apply continuous force to open the cap lever fully, increasing the operation range and user effort.
Innovation Solution
A liquid ejection apparatus with a cap lever that is held by a first operation portion and can move pivotally about a first pivotal shaft, and a second operation portion that assists in moving the cap lever from the closing to the opening position, reducing the required user effort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cap lever is opened by applying force from the apparatus front side, then the cap lever can be opened, but the operation range of the user is increased
Solution Approach 1:
A lever mechanism is introduced as an intermediary between the user's finger and the cap lever. The lever has a first operation portion that contacts the cap lever and a second operation portion that the user operates. This mechanical intermediary amplifies the user's input force and reduces the required operation range, resolving the contradiction between ease of operation and operation range.
Solution Approach 2:
The operation is shifted from direct linear movement at the cap lever to rotational movement at the lever's pivot point. By changing the dimension of operation from linear displacement to angular rotation, the user can achieve the same functional result with a smaller movement range, as rotational leverage provides mechanical advantage.
2Ease of operation
If the user applies continuous force to fully open the cap lever, then the cap lever opens completely, but the user effort is increased
Solution Approach 1:
The lever mechanism serves as a force amplifier, converting the user's small input force applied at the second operation portion into a larger output force at the first operation portion. This mechanical advantage reduces the total user effort required to overcome the cap lever's resistance and fully open it.
Solution Approach 2:
The system transitions from a static direct-force application to a dynamic leveraged system where force is applied continuously at one point while the cap lever rotates through its opening arc. The lever's pivot point acts as a fulcrum, allowing the user to maintain force application at a fixed location rather than continuously adjusting force along the cap lever's length.
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 improves the operability of the cap by reducing the range of user operation needed to open the cap lever, making the process more efficient and easier to perform.
Implementation Method 1
a cap held by a first operation portion capable of moving pivotally about a first pivotal shaft
Implementation Method 2
a second operation portion configured to move the first operation portion from the closing position to the opening position
Data Source
AI summary
A liquid ejection apparatus includes: a liquid ejection head configured to eject a liquid onto a recording medium; a liquid container having a filling port allowing the liquid to be poured through the filling port, the liquid container being configured to contain the liquid to be supplied to the liquid ejection head; a cap held by a first operation portion capable of moving pivotally about a first pivotal shaft, the cap being movable to a closing position where the cap closes the filling port and to an opening position where the cap opens the filling port; and a second operation portion configured to move the first operation portion from the closing position to the opening position.