Telescopic Rotary Camera Module With Parallel Sliding Pairs
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Solution Overview
Problem
Conventional telescopic camera modules suffer from low motion accuracy and stability issues, leading to jamming and stuttering, especially in scenarios requiring high stability, due to their transmission mechanisms.
Innovation Solution
A telescopic rotary camera module design utilizing a rotating shaft and shaft sleeve-type sliding pairs in parallel, with sliding blocks and accommodating cavities, ensures precise control over retraction, extension, and rotation movements, enhancing stability and accuracy through synchronized sliding block interactions and a split rotating shaft design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a lead screw and screw nut transmission mechanism is used, then the camera can extend or retract, but the motion accuracy is low and stability is poor
Solution Approach 1:
The patent replaces the traditional lead screw and screw nut transmission mechanism with a rack and pinion gear system. The rotating shaft with gears engages with the rack on the sliding block, converting rotational motion to linear motion through gear meshing. This mechanical substitution provides higher motion accuracy and stability while eliminating the jamming and stuttering problems associated with threaded transmissions.
Solution Approach 2:
The patent segments the transmission function into two independent components: the rack on the sliding block for linear motion control, and the pinion gears on the rotating shaft for rotational-to-linear conversion. This segmentation allows each component to be optimized independently, with the rack providing precise linear guidance and the pinion gears providing accurate motion conversion, thereby improving overall transmission reliability and accuracy.
2Ease of manufacture
If the camera module structure is simplified, then manufacturing is easier, but jamming and stuttering occur more frequently
Solution Approach 1:
The rotating shaft serves multiple functions: it rotates to drive the camera extension/retraction through gear-rack engagement, and it also provides structural support for the sliding block movement. The sliding block simultaneously guides the linear motion and transmits force. This multi-functionality reduces the number of separate components needed, simplifying the overall structure while maintaining high reliability and eliminating jamming issues.
Solution Approach 2:
The patent merges the guiding function and the force transmission function into the same sliding block and rack structure. The sliding block both guides the linear motion of the camera module and transmits the driving force from the gear system. This merging of functions reduces component count and structural complexity while improving reliability by eliminating potential failure points from additional separate components.
Data Source
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Figure 3(a)~3(c)
AI summary
Embodiments of this application disclose a telescopic rotary camera module and an electronic device. Embodiments of this application may be applied to an electronic device in different application scenarios. A body assembly of the camera module is connected to a base assembly by using two groups of shaft sleeve-type sliding pairs, and the two groups of shaft sleeve-type sliding pairs are disposed in parallel. In this way, a basic cooperation relationship for a retraction movement or an extension movement is established. A body may extend to drive a head assembly to follow and rotate, to meet a requirement on a shooting angle of view of a user. In practice, based on good movement accuracy of a shaft sleeve-type sliding clearance fit, two groups of sliding pairs are disposed in parallel, to accurately control movement trajectories of retraction and extension actions of the head assembly and the body assembly. In this way, the retraction movement or the extension movement of the head assembly and the body assembly is more stable, jamming and stuttering are avoided, and mute effect is enhanced.