Vibrator Weight Film Trimming to Avoid Reflected Laser Damage
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Solution Overview
Problem
In existing vibrators, the use of laser beams to adjust frequency and balance results in unintended processing due to oblique reflection from inclined surfaces, leading to accuracy and reliability issues.
Innovation Solution
The method involves emitting the laser beam from a normal direction to the planar surface of the weight film, avoiding the inclined surface to prevent unintended processing marks, thus ensuring precise frequency adjustment and improved reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the laser beam is emitted to the weight film at the inclined surface to remove the weight film, then the frequency of the vibrator can be adjusted, but the laser beam is obliquely reflected according to the inclined angle and unintended parts are irradiated with the reflected laser causing processing errors and reliability deterioration
Solution Approach 1:
The patent extracts the harmful reflected laser beam from the processing system by tilting the inclined surface at a specific angle (45 degrees), causing the reflected beam to be directed away from the weight film and adjacent components. This separates the useful function (laser removal of weight film) from the harmful effect (unintended irradiation), resolving the contradiction between manufacturing precision and reliability
Solution Approach 2:
The patent converts the harmful oblique reflection into a beneficial feature by deliberately designing the inclined surface angle to redirect the reflected laser beam away from sensitive areas. The reflection that was previously causing unintended processing is now used to protect adjacent components, transforming the harmful effect into a protective mechanism
2Adaptability or versatility
If the weight film is removed from the inclined surface to adjust frequency, then frequency adjustment is achieved, but adjacent vibrating arms or wiring may be processed unintentionally leading to frequency accuracy deterioration
Solution Approach 1:
The patent extracts the reflected laser beam from the processing path by positioning the inclined surface at a specific angle, separating the laser removal function from the adjacent components. This ensures that frequency adjustment can be performed without inadvertently affecting adjacent vibrating arms or wiring, maintaining frequency accuracy
Solution Approach 2:
The inclined surface acts as an intermediary element that mediates between the laser beam and the weight film. By positioning it at a specific angle, it controls the interaction between the laser and the weight film while protecting adjacent components, enabling frequency adjustment without compromising frequency accuracy
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 approach effectively prevents unintended processing on adjacent parts, enhancing the frequency accuracy and reliability of the vibrator by controlling where the laser beam is directed, specifically targeting the planar surfaces for processing.
Implementation Method 1
a removing step of removing a part of the weight film by emitting an energy ray to the weight film
Data Source
AI summary
A vibrator includes: a base portion; a vibrating arm including an arm portion which extends from the base portion, and a weight portion which is located on a tip end side of the arm portion and which has a first main surface and a second main surface that are in a front-back relationship; and a weight film disposed at the first main surface of the weight portion. The first main surface includes a planar surface and an inclined surface inclined with respect to the planar surface. A method for manufacturing a vibrator includes: a preparation step of preparing the above-described vibrator; and a removing step of removing a part of the weight film by emitting an energy ray to the weight film. In the removing step, the weight film disposed at the planar surface is removed and the weight film disposed at the inclined surface is not removed by emitting the energy ray to the weight film from a normal direction of the planar surface.