About US
is a sewing machine manufacturer based in Taiwan, established in 1992. With an in-house sewing machine factory to develop and produce high-quality household overlock machines, multi-functional overlock & cover stitch machines, computer sewing machines, felting machines with punching designs, and accessories over the years. TSANG YU INDUSTRIAL CO., Ltd has specialized in providing ODM services for internationally renowned brands and marketing our products as Merrylock brand name to global markets.
With extensive experience in developing innovative technology and securing invention patents, the company has established itself as a reliable ODM supplier for leading global household sewing machine brands. Its commitment to innovation and quality has been recognized with prestigious accolades, including the National Design Award, Innovation & Creation Award, and Innovation Research Award in Taiwan.
Merrylock MK6070
Household Air Threading Overlock and Coverstitch Combo Machine
-Reddot Design award 2025 (Product Design)
Merrylock MK6075
Household Air Threading ft. auto-tension Overlock and Coverstitch Combo Machine