Camera Lens Holder Groove with Ball Buffering Gap
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Solution Overview
Problem
Conventional camera structures with spherical voice coil motors experience high stress concentration due to point or surface contact between balls and grooves, leading to surface recessions and difficulties in motion control of charge carriers.
Innovation Solution
A camera structure is designed with a lens holder and lens frame, featuring a plurality of balls supported by first and second groove wall parts with a gap between each ball and the groove bottom, allowing for buffering and support during external impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If point or surface contact is used between balls and groove in conventional spherical voice coil motor, then the structure is simple and easy to manufacture, but stress concentration is very high leading to surface recessions and difficulty in motion control
Solution Approach 1:
The groove structure is segmented into multiple functional parts: a groove body, a first reinforcing rib extending from the groove opening, and a second reinforcing rib extending from the groove bottom. This segmentation distributes the contact stress across multiple structural elements rather than concentrating it on the groove surface alone, thereby reducing stress concentration while maintaining manufacturability.
Solution Approach 2:
The groove structure combines different structural features (groove body, reinforcing ribs with different orientations and positions) to create a composite structural system. The first reinforcing rib provides lateral support while the second reinforcing rib provides longitudinal support, creating a composite structure that distributes stress more evenly than a simple groove design.
2Ease of operation
If larger currents are used to control charge carriers motion, then motion control becomes possible, but the balls encounter collisions or vibrations leading to uneven movement
Solution Approach 1:
The first reinforcing rib extending from the groove opening toward the groove bottom serves as a preliminary support structure that cushions and distributes the impact forces before they reach the groove bottom. This beforehand cushioning reduces the severity of collisions and vibrations during ball movement, enabling smoother and more uniform motion control without requiring excessively large currents.
3Object-affected harmful factors
If the electronic device is subjected to impact or external force, then the device experiences stress, but the point contact or surface contact leads to high stress concentration and surface recessions
Solution Approach 1:
The groove structure is pre-designed with reinforcing ribs positioned to intercept and distribute impact forces before they concentrate on the groove surface. The first reinforcing rib extending from the opening and the second reinforcing rib extending from the bottom create a pre-positioned stress distribution network that activates during impact, preventing surface recessions before they occur.
Solution Approach 2:
The groove structure is extended into the third dimension by adding reinforcing ribs that protrude from the groove surfaces. This dimensional extension transforms the original two-dimensional groove surface into a three-dimensional reinforced structure, providing additional stress distribution pathways that reduce stress concentration during impact while maintaining the original groove's ball-guiding function.
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 structure effectively absorbs external forces through the buffering gap, preventing direct impact on the lens holder and internal components, thus enhancing the durability and stability of the camera.
Implementation Method 1
The first groove wall part and the second groove wall part support surfaces of the plurality of balls through point support
Implementation Method 2
When the electronic device with the camera structure provided by the present application undergoes abnormal impact caused by external forces or falls down, the electronic device with the camera structure provided by the present application utilizes the gap between the ball and groove bottom to be the buffering space for support
Data Source
AI summary
A camera structure, including a lens holder, a lens frame and a plurality of balls. The lens holder has a holder body, one end of which has a first rolling groove. The first groove wall part and the second groove wall part are disposed on two sides of the first rolling groove, and the groove bottom is disposed between the first groove wall part and the second groove wall part. The lens frame is mounted on an outer side of the holder body. The plurality of balls are located inside the first rolling groove, wherein the first groove wall part and the second groove wall part support the plurality of balls, there is a gap between each of the plurality of balls and the groove bottom, and the plurality of balls lay between the lens holder and the lens frame.