Piezoelectric Actuator Vibration Mechanism for Compact Handheld Devices
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Solution Overview
Problem
Conventional handheld electronic devices using eccentric motors for vibrating alerts occupy significant space, limiting design flexibility and increasing the risk of component damage due to the motor's vibration requirements.
Innovation Solution
A handheld electronic device design utilizing a piezoelectric actuator between the upper and lower housings, which shifts to create a vibrating alert, replacing the need for eccentric motors and allowing for a more compact and flexible design, with additional cushioning and positioning elements to enhance the alert mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an eccentric motor is used as a vibrating source, then a vibrating alert function is provided, but it occupies significant space within the handheld electronic device
Solution Approach 1:
The patent replaces the traditional eccentric motor (mechanical vibrating mechanism) with a piezoelectric actuator that utilizes the piezoelectric effect to generate vibrations. This substitution eliminates the need for heavy mechanical rotating components, significantly reducing the space required for the vibrating mechanism while maintaining the vibrating alert function.
Solution Approach 2:
The patent changes the fundamental operating principle from mechanical rotation (eccentric motor) to piezoelectric deformation (actuator). By changing the physical parameter from rotational mechanics to piezoelectric strain, the system achieves the same vibrating function with dramatically reduced spatial requirements.
2Reliability
If an eccentric motor is used as a vibrating source, then a vibrating alert is provided, but it increases the overall device size and reduces design flexibility
Solution Approach 1:
By replacing the bulky eccentric motor with a compact piezoelectric actuator, the patent enables greater design flexibility in arranging internal components. The reduced size of the vibrating mechanism allows for more adaptable device configurations and thinner overall device profiles.
Solution Approach 2:
The patent transitions from a two-dimensional planar arrangement constrained by the eccentric motor's rotational space requirements to a more compact three-dimensional configuration enabled by the piezoelectric actuator's minimal spatial footprint, allowing for innovative device designs.
3Reliability
If an eccentric motor is used as a vibrating source, then vibrations are generated, but components may be damaged due to proximity to the vibrating motor
Solution Approach 1:
The patent replaces the high-impact mechanical vibrations from an eccentric motor with the controlled, lower-impact vibrations generated by a piezoelectric actuator. This substitution significantly reduces the risk of damage to surrounding components while maintaining the vibrating alert function.
Solution Approach 2:
The patent incorporates cushioning elements positioned between the piezoelectric actuator and surrounding components to further protect against potential damage. These cushions provide a safety buffer that absorbs any excessive vibrations or impacts, preventing component damage before it occurs.
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 solution provides a more compact and flexible design for handheld electronic devices by generating a three-dimensional vibrating alert effect without the space constraints of eccentric motors, while ensuring component safety through controlled displacement.
Implementation Method 1
an actuator, which is a piezoelectric component
Implementation Method 2
a plurality of first cushions, which are respectively disposed in the corresponding position holes, and are propped between the corresponding position posts and the position holes
Data Source
AI summary
A handheld electronic device including a lower housing, an upper housing, a touch panel, a display module, a partition, position posts, cushions, and an actuator is provided. The upper housing is above and separated from the lower housing. The touch panel is at an opening of the upper housing and connects with the upper housing. The display module is disposed in the upper housing and connected with the lower housing. The partition is between the display module and the lower housing and connected to the upper housing. The partition has position holes. The position posts are located in their corresponding position holes and connected with the display module. The cushions are located between the corresponding position post and the position hole. The actuator is disposed between the display module and the upper housing to force the upper housing to shift relative to the display module and the lower housing.