At the intersection of population structure change and scientific and technological innovation, it has become an important proposition of the industry to meet the deep desire of the elderly for quality life and action autonomy. On November 27, 2025, a product launch conference with the theme of "Smart Silver Hair · New Living Method" announced the official launch of a smart dual-drive four-wheel scooter code-named VOCIC "Sunset Years.

The birth of this product is not only a successful listing of the product, but also a warm chapter about dignity, care and freedom jointly composed by Medster, a leading enterprise of TOALL convex and concave design and home rehabilitation medical devices, which lasted two years, with deep empathy and hard core technology.

Consensus-the starting point for everything from the pursuit of "different" began with an invitation from Medster to TOALL convex and concave design two years ago. At that time, Medster was no longer an industry recruit. As a national high-tech enterprise focusing on the research and development, production and sales of rehabilitation aids and medical devices, Medster, with its deep accumulation in the fields of electric nursing beds and wheelchairs, ranks among the top three in the industry in terms of search volume on mainstream e-commerce platforms, with annual revenue reaching hundreds of millions and sustained rapid growth. However, when the two parties jointly discussed and reviewed the elderly transportation products on the market, they saw the general limitations: single function, rigid design, and doubtful safety. Most of them are just basic "mobile tools", rather than carrying a good life in old age. "partner".

Medster's vision is clear: they want to build a "different" product. This is not only a scooter, but also a lifestyle proposal. It must go beyond basic functions and achieve a comprehensive breakthrough in safety, ease of use, emotional connection and aesthetic value. It is this forward-looking appeal that has led them to the convex and concave design known for its deep user insight and innovation in intelligent product system design. The two sides hit it off and decided to jointly challenge the pain points of the industry. The project code "VOCIC"-meaning "Voice of Care and Independence in China" (Voice of China's Care and Independence)-was launched. empathy-from pain point insight to design transformation convex and concave design team knows that great design begins with down-to-earth understanding. After the project started, the designers did not rush to draw sketches, but went deep into the community, nursing homes and users' families for months of immersive research. They observed that many elderly people were afraid to enter the vegetable market or their narrow living rooms for fear of heavy vehicles and difficulty in turning. For fear of slipping on the ramp and turning over sharply, he gave up going to the small slope of the park. Afraid of complicated operation and heavy batteries. These subtle but real dilemmas limit their radius of life and wear away their self-confidence and dignity.

Based on these insights, the design goals become clear: safety is the bottom line, ease of use is the core, and elegance is the temperament. In the design process, the convex and concave team will "barrier-free" concept throughout. They abandoned the cold lines of traditional industrial products and drew inspiration from the smooth curves of oriental gardens and the warm texture of their homes.

In the sketch stage, hundreds of schemes are repeatedly deliberated; in the 3D modeling and rendering stage, the size and feedback of each surface and button are carefully simulated by ergonomics.

Based on immersive user research, the operation logic is optimized, and the super-large keys are matched with clear guidance, so that even elders with weak finger strength can control with one click.

The final renderings show a product with round and full shape, soft and friendly colors. It is not like a medical device, but more like a delicate home artwork. It aims to eliminate the psychological resistance of users and make them willing to integrate into daily life. scene.

TOALL's convex and concave design team has also made a wealth of accessories design for this scooter to broaden the use scene with accessories and make it more convenient for the elderly to use the scooter.

Co-creation-Hard Core Technology Enables Free Experience TOALL Convex and Concave Design Delivers not only a set of exquisite appearance plans, but also a challenging technical specification. Transforming this design blueprint full of humanistic care into reality is the test of Medster's profound medical device research and development and manufacturing skills.

The team of engineers in Medster went up against the difficulties and injected five core technologies into the "sunset years" D62 to turn it into a "smart mobile platform": subversive flexibility: the world's leading zero turning radius design enables vehicles to turn in situ in narrow corridors or even elevators, thus truly solving the "last meter" traffic problem.

All-round stability: Integrated intelligent anti-rollover system and real-time body tilt control technology, combined with precision electronic control algorithm, can maintain the stability of the flat ground even in sharp turns or uneven roads, giving users full confidence. Powerful driving and braking: It adopts dual-wheel motor direct drive and a quick-response electromagnetic brake system to provide strong power while ensuring robustness and strength when going up and down the slope, and completely eliminate the risk of slipping. considerate intelligent escort: the intelligent speed control system realizes smooth slow start and stop, avoiding discomfort caused by sudden forward rush or braking. The system can more intelligently identify the ramp, automatically adjust the power output, and realize "strong uphill and controllable downhill".

Convenient daily friendliness: The overall structure is compact and small, convenient for storage and transportation. The innovation adopts NFC card key, which can be started at the touch of a touch, eliminating the trouble of finding a mechanical key. The dual-battery parallel system not only extends the battery life, but also supports hot plug replacement, making travel worry-free.

The integration of these technologies reflects Medster's control of the supply chain and its demanding quality as an industry leader. The modern industrial park and automatic production line invested by it provide a solid guarantee for the precision manufacturing and reliable quality of products. Resonance-witnessing the birth of a great product The press conference on November 27, 2025 has become a stage for the display of ideas and achievements. When the curtain opened, "sunset years" D62 with its warm jade texture and full of scientific and technological sense of the line stunning the audience.

The press conference not only demonstrated its excellent mobility, but also vividly demonstrated how it helped an old man regain the pleasure of visiting the morning market and meeting old friends through the story video of real users, and how it made a family feel at ease about the elder's travel alone.

As an indispensable co-creation partner, the TOALL Convex Design team was invited to attend and stand side by side with Medster management. Mr. Lian Zhen, co-founder and general manager of Convex & Concave Design, said in the sharing session, "Good design is invisible, it should not be an obstacle, but a bridge. We are working with Medster to design this bridge that connects cutting-edge technology with the real needs of our elders, and connects safety, reliability and elegance."

As an indispensable co-creation partner, the TOALL Convex Design team was invited to attend and stand side by side with Medster management. Mr. Lian Zhen, co-founder and general manager of Convex & Concave Design, said in the sharing session, "Good design is invisible, it should not be an obstacle, but a bridge. We are working with Medster to design this bridge that connects cutting-edge technology with the real needs of our elders, and connects safety, reliability and elegance."

The listing of the D62 intelligent walker in the future "sunset years" is a perfect integration of TOALL's convex and concave design concept of "Good Design To Alll for All" and Medster's mission of "Science and Technology Enabling Quality Life. It proves that in the face of the challenges of an aging society, the answer lies not only in functional stacking, but also in deep empathy, bold design and solid technology. This product is a gift to all the elderly who pursue independence: freedom is not the patent of young people, and the warm light of science and technology should illuminate everyone's way of travel, so that every departure has become a new starting point for a better life.