Magnetic Push Knob Structure for Clear On-Off Tactile Feedback
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Solution Overview
Problem
Conventional switch apparatuses for electronic equipment, such as those used in electronic keyboards, often require manual confirmation of power supply states through tactile interaction, which can be cumbersome and lack clear differentiation between on and off states, leading to potential operational issues like rattling and resistance inconsistencies.
Innovation Solution
A switch apparatus featuring a volume knob with a push unit that protrudes more in the on state due to magnetic attraction between a permanent magnet and a magnetic body, providing a clear tactile distinction and reducing rattling through a mechanism that utilizes a magnetic force along the axial direction, allowing smooth operation and enhanced user feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional switch apparatus uses a push unit held protruding or recessed by mechanical means (spring and electromagnet), then the on/off state can be confirmed by touching the button, but the tactile distinction between states is unclear and rattling occurs
Solution Approach 1:
The patent replaces the conventional mechanical spring-based holding mechanism with a magnetic field-based mechanism. A magnet and magnetic body are used to generate magnetic attraction force that holds the push unit in the protruding state, eliminating the mechanical spring and reducing mechanical wear and rattling. This substitution provides smoother operation and more consistent tactile feedback.
Solution Approach 2:
The patent utilizes changes in magnetic field strength to control the state of the push unit. By adjusting the magnetic attraction force parameters, the system achieves clear tactile distinction between states without mechanical complexity. The magnetic force provides consistent holding force that eliminates rattling while maintaining operational reliability.
2Reliability
If a switch apparatus uses mechanical components (spring, electromagnet, permanent magnet) for state holding, then the structure is well-defined, but the device complexity increases and manufacturing becomes more difficult
Solution Approach 1:
The patent extracts and eliminates unnecessary mechanical components from the conventional switch apparatus. By removing the spring and using only a magnet-magnetic body combination, the design simplifies the structure while maintaining state holding stability. This extraction reduces the number of parts and simplifies manufacturing processes.
Solution Approach 2:
The magnet and magnetic body serve multiple functions: they provide the holding force for state maintenance, generate the magnetic attraction for state transition, and eliminate the need for separate spring components. This multi-functionality reduces overall device complexity while maintaining reliability.
3Ease of operation
If a switch apparatus uses conventional mechanical holding mechanisms, then the structure is established, but resistance inconsistency and operational smoothness are compromised
Solution Approach 1:
The patent replaces mechanical spring-based resistance with magnetic field-based resistance, providing more consistent and controllable force characteristics. The magnetic attraction force provides uniform resistance during operation, eliminating the variability associated with mechanical spring wear and positioning tolerances.
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 enhances the operational quality of the volume knob by providing a clear tactile distinction between on and off states, reducing rattling, and offering consistent resistance, thereby improving user experience and control over electronic instrument settings.
Implementation Method 1
the at least one magnet and the at least one magnetic body are attracted to each other by a magnetic force along the axial direction in a first state in which the button protrudes from the case in the first direction more than in a second state
Data Source
AI summary
A switch apparatus includes a case, a button provided on the case and can be operated by pushing from a first direction, and a shaft provided in a space within the case and configured to move together with the button along an axial direction in response to an operation on the button, wherein, within the space, at least one magnet is fixed to either the case or the shaft, and at least one magnetic body is fixed to a remaining one, and wherein the at least one magnet and the at least one magnetic body are attracted to each other by a magnetic force along the axial direction in a first state in which the button protrudes from the case in the first direction more than in a second state.