Low-friction and low-noise solution for OPPO’s smartphone with pivot-rising camera.


The pivot-rising camera is the hallmark of OPPO’s new Reno flagship model. OPPO designers wanted to deliver a “wow” experience for consumers with sophisticated camera movement and excellent photo-taking performance without losing screen area for the embedded camera.

200 thousand cycles of use

This unique new shark fin-like pop-up module had some particular requirements:


The pivot mechanism had to operate reliably for at least 200,000 cycles, working flawlessly over the five-year life of the phone.


When the OPPO Reno camera goes into action, it rises from the smartphone in just 0.8 seconds, and the movement of the camera has to be fast and quiet.


OPPO had tested other materials for the pivot hinge, but they all failed on repeated, rigorous reliability tests. Our team worked closely with OPPO’s designers to fully understand the specific requirements and challenges. In-lab testing that simulated smartphone use demonstrated, where other materials under-performed, that Delrin® materials remained strong and reliable.

0.8 seconds to rise and pivot

Together with OPPO we worked to:

  • Understand the functional requirements of the hinge

  • Lab test the materials

  • Meet the physical requirements of the hinge


Our experts determined that two grades of DuPont™ Delrin® acetal homopolymers would deliver the performance OPPO required for the compact, sliding component that pivots the camera up from the top edge of the Reno smartphone.

Both grades have an advanced self-lubricating characteristic in addition to the superior properties of low wear, low friction, and low noise against metals and plastics. The performance of Delrin® materials allowed the pivot mechanism to deliver reliable operation for at least 200,000 cycles. When the OPPO Reno camera goes into action, it rises from the smartphone in just 0.8 seconds. The pivot movement is intricate, first moving fast then slow.

Key solution benefits of Delrin® include:

  • Increased design flexiblity

  • Lighter parts and less material usage

  • Improved molding and shorter cycle times

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