Modern people pursue a comfortable life, and sofas are no longer designed just for sitting people. The emergence of multifunctional sofa beds has brought great convenience to people's lives. Lying on the sofa bed and watching TV is a great enjoyment. So choosing a stable sofa bed frame is very important. Let's first talk about how to choose high-quality sofa hinges.

1. Look at the appearance and take a few sofa hinges to see if the shape of the hinges is roughly consistent. Many poor hinge factories produce hinges that are black here and yellow there, with unstable plating and thin plating layers, which can easily rust.

2. Holding the iron cup with hinges, slowly close the hinges like closing a door. Remember to be slow. If you feel that the hinges are smooth and unobstructed, and even try a few times, they are smooth, then the sofa hinge product is preliminarily qualified. If you notice any obstruction or noise in the middle, or even both, then you need to be careful whether there is a quality issue with this hinge.

3. After installing the door, press down slightly and check the force on the hinge. If it sinks easily and seriously, you should be careful that the door panel will appear asymmetrical in the future.

4. Use a professional fatigue testing machine to test its durability, and use a salt spray tester to test its rust resistance. This is not something that ordinary consumers can achieve.

5. Use a screwdriver to test the adjustment screw of the hinge and the fastening screw at the end of the hinge several times to see if it is easy to slip teeth. If it is easy, it should be noted that using such hinges can be very troublesome. If they cannot be adjusted and are not stable, then there is only a sigh of relief