Sound Device Metal Frame Positioning via Injection Molded Location Pin
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Solution Overview
Problem
The existing sound devices with metal frames cannot accommodate a plastic location pin, preventing the proper positioning of the lower clamp plate, which is necessary for the magnetic system's operation.
Innovation Solution
A sound device with a metal frame that includes a location pin formed by injection molding on the circumference of the lower clamp plate, allowing the end of the location pin to be attached to the metal frame, thereby enabling the positioning of the metal frame and indirectly securing the upper clamp plate through a positioning gap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the frame is made of metal to reduce overall volume or increase sounding cavity space, then the frame thickness can be reduced, but the plastic location pin cannot be set on the metal frame, leading to inability to position the lower clamp plate
Solution Approach 1:
The patent introduces a plastic frame cover as an intermediary component that interfaces between the metal frame and the plastic location pin. The location pin is embedded in the plastic frame cover rather than directly in the metal frame, allowing positioning functionality to be maintained while using a thin metal frame. The plastic frame cover acts as a mediator that combines the advantages of both materials.
Solution Approach 2:
The patent creates a composite structure by combining metal frame and plastic frame cover into a unified assembly. The metal frame provides structural strength and thin profile, while the plastic frame cover provides positioning capability through embedded location pins. This composite approach allows both materials to contribute their respective advantages to the overall system.
2Length of moving object
If the frame is made of metal into a metal frame, then the frame can be made thinner, but it will not be able to set the plastic location pin
Solution Approach 1:
The plastic frame cover serves as an intermediary layer between the metal frame and the plastic location pin. It allows the location pin to be effectively set and function on the metal frame by providing a suitable substrate (the plastic cover) that can accommodate and secure the location pin, thus resolving the material incompatibility issue.
Solution Approach 2:
The patent divides the frame structure into two separate components: a metal frame for structural support and a plastic frame cover for positioning functionality. This segmentation allows each component to be optimized for its specific function - the metal frame can be made thin while the plastic cover provides the necessary positioning features.
3Manufacturing precision
If the lower clamp plate needs to be positioned with the metal frame, then a positioning mechanism must be implemented, but plastic location pins cannot be directly used on the metal frame
Solution Approach 1:
The patent merges the positioning function into the frame assembly by integrating the plastic frame cover with the metal frame. The location pins are embedded in the plastic cover which is then assembled with the metal frame, creating a unified positioning system that maintains precision while avoiding the need for separate positioning mechanisms.
Solution Approach 2:
The plastic frame cover acts as a mediator that enables precise positioning of the lower clamp plate on the metal frame. By embedding location pins in the plastic cover rather than trying to directly position on the metal frame, the system achieves manufacturing precision comparable to plastic frames while maintaining the advantages of metal construction.
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 allows for stable positioning of the metal frame, ensuring the magnetic system functions correctly and maintaining structural integrity by forming a one-piece molded structure with the upper clamp plate, enhancing the overall assembly and operation of the sound device.
Implementation Method 1
a sub-magnet set around the main magnet and spaced apart from the main magnet to form a magnetic gap
Data Source
AI summary
The present disclosure discloses a sound device comprising: a metal frame; a vibration system fixed to metal frame; a magnetic system fixed to metal frame driving the vibration system to vibrate; the magnetic system includes a lower clamp plate, a main magnet fixed to the side of the lower clamp plate near the vibration system, and a sub-magnet set around the main magnet and spaced apart from the main magnet to form a magnetic gap; the sound device also includes a location pin fixed to the lower clamp plate, the location pin is formed on the circumference of the lower clamp plate by injection molding, and the end of the location pin away from the lower clamp plate is attached to the metal frame to form a positioning of the metal frame. The present disclosure can make the lower clamp plate positioned with the metal frame through the location pin, thus avoiding the problem that the lower clamp plate cannot be positioned with the metal frame.