August 26 news: According to information from the National Intellectual Property Administration, Zhejiang Tianceng Autocontrol Co., Ltd. has applied for a patent titled “A Four-Direction Extension Device for a Seat Leg Rest.” The granted publication announcement number is CN224675947U, and the grant announcement date is August 25, 2026. The application number is CN202522807428.3. The application publication date is August 25, 2026, and the application date is December 30, 2025. The inventors are Song Weiyuan, Dai Yeyu, Dong Yipeng, and Pang Chenlu. The patent agency is Taizhou Yulei Patent Agency (General Partnership), and the patent agent is Cui Yu Hai. The classification number is B60N2/90.

Patent abstracts show that this utility model belongs to the field of seat technology and specifically relates to a four-way extension device for a seat leg rest, comprising: 1) Linkage telescoping mechanism: Two sides of the front cross tube of the seat cushion skeleton are symmetrically fixed with mounting plates. On each mounting plate, a first long connecting rod and a first short connecting rod are hingedly connected at intervals. One end of the second long connecting rod is hinged to the outer end of the first short connecting rod, while the middle of the second long connecting rod is hinged to the middle of the first long connecting rod. The outer ends of the first long connecting rods are each hinged to a second short connecting rod. The telescoping of the linkage telescoping mechanism is driven by a lead-screw motor. 2) Leg-rest sliding mechanism: The lower portions on both sides of the fixed plates are each hinged with the two second long connecting rods and the two second short connecting rods. On the lower portions of both sides of the fixed plate, slide grooves that are parallel to each other are arranged. The two sides of the sliding plate are correspondingly mounted and slide in the slide grooves. A second lead-screw motor drives the sliding plate to move within the slide grooves, enabling the sliding plate to slide on the fixed plate. Advantages: stepless adjustment, comfortable use, and suitable for promoting application on various seats and sofas.

Tiancheng Control is a leading enterprise in the domestic seating industry. It focuses on the R&D and manufacturing of seats for multiple scenarios and has advantages in a full-industry-chain layout. The company was established on January 21, 2000, and listed on the Shanghai Stock Exchange on June 30, 2015. Both its registered address and office location are in Zhejiang Province.

Tiancheng Control’s main business covers the R&D design, production, and sales of passenger vehicle seats, aircraft seats, seats for construction machinery and commercial vehicles, and child safety seats. The company belongs to the Shenwan industry classification of Auto—Auto Parts—Body attachments and decorative parts.

In the first half of 2026, Tiancheng Control achieved operating revenue of RMB 1.53 billion. Among 20 comparable companies in the industry, it ranked 9th. Fuding Glass, the top company for industry revenue in the period, had revenue of RMB 21.971 billion; second was Jifeng Co., Ltd. with RMB 13.078 billion. The industry average revenue was RMB 2.926 billion, and the industry revenue median was RMB 1.24 billion. During the period, the company’s revenue from vehicle seats and related parts contributed RMB 1.383 billion, accounting for 90.34%; revenue from aircraft seats and related parts contributed RMB 128 million, accounting for 8.33%; and other business revenue was RMB 20.3489 million, accounting for 1.33%. In the same period, the company realized net profit of RMB 50.5994 million, ranking 14th among 20 comparable industry companies. Fuding Glass had the top industry net profit of RMB 3.972 billion; second was Jifeng Co., Ltd. with RMB 396 million. The industry average net profit was RMB 299 million, and the industry net profit median was RMB 81.3183 million.

The recent patent situation of Zhejiang Tiancheng Control Co., Ltd. is as follows:

1 Patent name Patent type Legal status Application number Application date Publication (announcement) number Publication (announcement) date Inventor A seat backrest with a linkage unlocking device involving a turntable and a slide rail, Invention patent, In substantive examination with effectiveness and publication, CN202610202260.X, 2026-02-12, CN121777776A, 2026-04-03, Zhang Tongle, Guan Xiaowei A vehicle seat with a rhythmic massage exciter, Utility model, Granted, CN202522828615.X, 2025-12-31, CN224675948U, 2026-08-25, Song Weiyuan, Dai Yeyu, Dong Yipeng, Pang Chenlu, Wang Hui A four-way extension device for a seat leg rest, Utility model, Granted, CN202522807428.3, 2025-12-30, CN224675947U, 2026-08-25, Song Weiyuan, Dai Yeyu, Dong Yipeng, Pang Chenlu A positioning module with adjustable limit-hook welding height, Invention patent, In substantive examination with effectiveness and publication, CN202511799042.0, 2025-12-02, CN121245369A, 2026-01-02, Zhao Quanlong, Hou Yinlei, Lu Fubin An adaptive seat height adjustment system, Utility model, Granted, CN202521969620.6, 2025-09-13, CN224631599U, 2026-08-14, Zhou Yindong, Miao Weisuo, Yao Wei An adaptive seat adjustment device for passenger vehicles, Utility model, Granted, CN202521915945.6, 2025-09-05, CN224660544U, 2026-08-21, Man Hongjun, Liang Hongze, Tao Huijia A zero-gravity seat with a flip-able backrest, Utility model, Granted, CN202521748041.9, 2025-08-18, CN224588970U, 2026-08-04, Liu Yuyuan, Xie Shulin, Xu Hao, Xiong Wanbing A zero-gravity cushion device for a vehicle seat, Utility model, Granted, CN202521602587.3, 2025-07-30, CN224103922U, 2026-04-10, Xu Longsheng, Fang Jinqin A low-cost airbag charging and discharging control device for a seat lumbar support, Utility model, Granted, CN202521602235.8, 2025-07-30, CN224099022U, 2026-04-10, Gao Yu A mechanism for converting a vehicle seat into a flat bed, Utility model, Granted, CN202521586517.3, 2025-07-29, CN224090073U, 2026-04-07, Xu Longsheng, Hu Jianhua, Ju Yangyang, Fang Jin, Xia Haizhou A semi-automatic lifting concealed small tabletop mechanism for a vehicle armrest, Utility model, Granted, CN202521521768.3, 2025-07-21, CN224210954U, 2026-05-08, Wang Jingfei A sliding dual-unlocking mechanism for folded headrests of automotive seats, Utility model, Granted, CN202521442364.5, 2025-07-10, CN224013449U, 2026-03-20, Wang Hui, Wang Liuping, Wu Jiangang, Hu Jianhua, Shi Shuailei A footrest mechanism for automotive seats, Utility model, Granted, CN202521442615.X, 2025-07-10, CN224045082U, 2026-03-27, Zhao Jiang, Wang Hui, Xu Longsheng, Fang Jin, Xia Haizhou Automotive seat (Jin Qianhua) design patent, Granted, CN202530386954.X, 2025-07-03, CN309845557S, 2026-03-17, Wang Qi, Wang Henghao, Yu Wenhui Automotive seat (Xian Fanxing) design patent, Granted, CN202530386991.0, 2025-07-03, CN309863410S, 2026-03-24, Wang Henghao, Wang Qi, Yu Wenhui A forward-flip seat based on an angle-regulating mechanism, Utility model, Granted, CN202521370950.3, 2025-07-01, CN223999391U, 2026-03-17, Man Hongjun An elevating and lowering mechanism for a vibration-damping seat for passenger vehicles, Utility model, Granted, CN202521370717.5, 2025-07-01, CN224045065U, 2026-03-27, Man Hongjun, Zhang Jiajun A headrest elevating and unlocking structure, Utility model, Granted, CN202521370447.8, 2025-07-01, CN224045078U, 2026-03-27, Wang Linzhou A novel adaptive passenger vehicle seat, Invention patent, In substantive examination with effectiveness and publication, CN202510604624.2, 2025-05-12, CN120171395A, 2025-06-20, Man Hongjun, Liang Hongze A novel adaptive passenger vehicle seat, Utility model, Granted, CN202520922357.9, 2025-05-12, CN223803457U, 2026-01-16, Man Hongjun, Liang Hongze A memory-less seat driving motor control device, Utility model, Granted, CN202520892661.3, 2025-05-08, CN223835447U, 2026-01-27, Gao Yu A novel automotive seat, Utility model, Granted, CN202520881650.5, 2025-05-07, CN223812513U, 2026-01-20, Huang Xiaorong, Xiong Wanbin A sleeping berth headrest board adjustment device, Utility model, Granted, CN202520859583.7, 2025-04-30, CN223736030U, 2025-12-30, Hou Yinlei A commercial vehicle zero-gravity seat, Utility model, Granted, CN202520860414.5, 2025-04-30, CN223735883U, 2025-12-30, Jin Pinfeng, Miao Weisuo, Hou Yinlei A vibration reminder seat, Utility model, Granted, CN202520663495.X, 2025-04-09, CN224013421U, 2026-03-20, Hou Yinlei, Ren Xiaoming A concealed hanging and tightening structure for a seat cushion cover, Utility model, Granted, CN202520622374.0, 2025-04-03, CN223653524U, 2025-12-12, Kong Fei, Zhou Zhichao A shielding structure for an airbag on one side of a seat, Utility model, Granted, CN202520622173.0, 2025-04-03, CN223821632U, 2026-01-23, Kong Fei, Zhou Zhichao A slide-rail wiring harness layout device, Utility model, Granted, CN202520369141.4, 2025-03-05, CN223583630U, 2025-11-21, Wei Baisheng, Chen Yun A connection structure for a slide-rail drive component, Utility model, Granted, CN202520370157.7, 2025-03-05, CN223640402U, 2025-12-09, Wei Baisheng, Chen Yun A backrest flipping and unlocking device for a seat, Utility model, Granted, CN202520375893.1, 2025-03-05, CN223702357U, 2025-12-23, Qi Danxi, Miao Weisuo, Wu Yaobo, Hou Yinlei A seat slide-rail locking device, Utility model, Granted, CN202520369814.6, 2025-03-05, CN223702355U, 2025-12-23, Wei Baisheng, Chen Yun A vehicle cabin in which a seat can be flattened to support the widening of a berth, Utility model, Granted, CN202520372938.X, 2025-03-05, CN223702361U, 2025-12-23, Hou Yinlei, Qi Danxi, Wu Yaobo An adjustable slide-rail gap-eliminating structure, Utility model, Granted, CN202520370000.4, 2025-03-05, CN223720717U, 2025-12-26, Wei Baisheng, Chen Yun A vibration-damping seat for passenger vehicles adapting to the weight of occupants, Utility model, Granted, CN202520284400.3, 2025-02-21, CN223478875U, 2025-10-28, Man Hongjun, Zhang Jiajun A lead-screw long slide-rail gap-eliminating structure, Utility model, Granted, CN202520267728.4, 2025-02-19, CN223467033U, 2025-10-24, Wei Baisheng, Chen Yun A seat cushion flipping device, Utility model, Granted, CN202520266484.8, 2025-02-19, CN223467041U, 2025-10-24, Hou Yinlei, Qi Danxi, Wu Yaobo A reinforced slide-rail structure, Utility model, Granted, CN202520267660.X, 2025-02-19, CN223494337U, 2025-10-31, Wei Baisheng, Chen Yun A seat height adjustment system adapting to body weight, Utility model, Granted, CN202520247448.7, 2025-02-17, CN223720718U, 2025-12-26, Yao Wei, Zhou Yindong A seat (small surrounding) design patent, Granted, CN202530065499.3, 2025-02-14, CN309608415S, 2025-11-18, Wang Henghao, Wang Qi A seat (1) design patent, Granted, CN202530065553.4, 2025-02-14, CN309608416S, 2025-11-18, Wang Henghao, Wang Qi A flip-over seat cushion, Utility model, Granted, CN202520228942.9, 2025-02-13, CN223452991U, 2025-10-21, Hou Yinlei, Luo Yuxin A seat with a shielding structure at the rotation-combined part of a seat cushion and a leg rest, Utility model, Granted, CN202520102408.3, 2025-01-16, CN223298770U, 2025-09-05, Kong Fei, Ding Jinping, Yu Wenhui A three-point safety belt connection structure for a seat, Utility model, Granted, CN202520031246.9, 2025-01-07, CN223187467U, 2025-08-05, Hou Yinlei, Luo Yuxin A rotating and folding mechanism for a vehicle seat headrest, Utility model, Granted, CN202423193140.3, 2024-12-24, CN223212270U, 2025-08-12, Ma Shengming, Wang Miaowen, Chen Sunshui An air-suspension (vibration-damping) seat mechanism with an air reservoir, Invention patent, In substantive examination with effectiveness and publication, CN202411887551.4, 2024-12-20, CN119636537A, 2025-03-18, Yang Jian, Guan Xiaowei, Chen Yun An air-suspension (vibration-damping) seat mechanism with an air reservoir, Utility model, Granted, CN202423154377.0, 2024-12-20, CN223131876U, 2025-07-22, Yang Jian, Guan Xiaowei, Chen Yun A flip-pull-out vehicle berth, Utility model, Granted, CN202423154867.0, 2024-12-20, CN223443392U, 2025-10-17, Lu Xiujian, Guan Xiaowei A seat vibration-damping device adapting to human body weight, Utility model, Granted, CN202423111825.9, 2024-12-17, CN223169414U, 2025-08-01, Ye Wanfu A horizontal vibration-damping mechanism for a vehicle seat, Utility model, Granted, CN202422636139.7, 2024-10-30, CN223252825U, 2025-08-22, Ye Wanfu, Wang Sutong A dual vibration-damping mechanism for a vehicle seat, Utility model, Granted, CN202422613174.7, 2024-10-29, CN222959661U, 2025-06-10, Ye Wanfu, Jin Pinfeng Statement: The market has risk; investment should be done with caution. 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