Camera Module Shock Absorption for Bobbin Collision
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Solution Overview
Problem
The existing camera module designs using VCM for auto focusing suffer from repetitive collisions between the bobbin and the base, leading to foreign object generation and pollution of the IR filter, resulting in image defects and characteristic distortions.
Innovation Solution
A camera module design incorporating a shock absorption member, such as foam, rubber, or urethane, arranged between the rib members on the bobbin and the base to absorb shocks during reciprocating movement, minimizing contact and preventing filter pollution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the bobbin is designed to reciprocate for focus adjustment, then the focusing function is achieved, but the bobbin and base collide repetitively generating foreign objects
Solution Approach 1:
A shock absorption member is installed between the bobbin and base to cushion the impact before collision occurs. This member compresses during the reciprocating movement, absorbing the shock energy and preventing direct contact between the bobbin and base, thereby eliminating foreign object generation while maintaining the focusing function
2Ease of operation
If the bobbin reciprocates for focus adjustment, then the focusing function is achieved, but the IR filter is polluted by foreign objects
Solution Approach 1:
The shock absorption member is positioned to intercept the bobbin's reciprocating movement before it can collide with the base and generate foreign objects. By compressing during normal operation, it prevents the generation of particles that would otherwise pollute the IR filter, thus protecting the filter while maintaining focusing capability
3Stability of the object's composition
If the rib members are used for shock absorption, then the bobbin movement is controlled, but the rib members themselves suffer from collision damage
Solution Approach 1:
A separate shock absorption member is introduced as an intermediary between the rib members and the base. This member takes over the shock absorption function, allowing the rib members to maintain their structural role without suffering from collision damage. The shock absorption member compresses to control bobbin movement while protecting the rib members from direct impact
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 camera module effectively reduces the generation of foreign objects and minimizes damage to the rib members, thereby preventing filter pollution and maintaining image quality by absorbing shocks during bobbin movement.
Implementation Method 1
the shock absorption member is compressed by being elastically deformed, in a case the base is brought into contact with the rib members
Data Source
AI summary
The present invention relates to a camera module, the camera module including a PCB (Printed Circuit Board) mounted with an image sensor, a base formed with an IRCF (Infrared Cut Filter) at a position corresponding to that of the image sensor, a bobbin including a coil winding unit vertically reciprocatively formed at an upper surface of the base and provided at a periphery, and a plurality of rib members protrusively formed from a floor surface, a yoke formed with a magnet arranged at a position corresponding to that of a coil of the bobbin, and a shock absorption member arranged at an ambience of the rib members and longer than the rib member, wherein the shock absorption member is compressed by being elastically deformed, in a case the base is brought into contact with the rib member.