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Question:

What's the swimming sign behind the watch?

What's the swimming sign behind the watch?

Answer:

Waterproof specificationGeneral watch waterproof specifications are divided into the following: 30 meters, 50 meters, 100 meters, 300 meters, 500 meters.30 meters: refers to the general life waterproof, that is, when washing hands splashing water droplets, as well as raindrops falling raindrops, but can not pay attention to too long, can not be worn in the sauna room.50 meters: and 30 meters no difference, can be ignored.100 meters: you can take him to the car, shower, but not soaked in water.300 meters: for swimming activities, but only for shallow swimming. (never understand that it can be 300 meters.)500 meters at this level can be submerged, as it is 1, 200 or so, may be more, but not according to the established value to do so, maybe that is the limit of your watch can bear, so don't use this method to test performance.
It shows that the watch has waterproof function.Waterproof watchStandard contentThe watch's waterproof relies on the watch mirror, the back cover and the waterproof rubber ring at the first place to meet the corresponding standards. All waterproof watches are on the bottom cover with the words "WATER RESISTANT" or "WATER PROOF". No mark can only watch waterproof dustproof, should avoid water. 30 meters (3ATM, or 3 atmospheres) waterproof watch, which can be used for daily cleaning or rain, that is, water droplets are splashed on the surface without any water pressure on the watch. 50 meter waterproof watch, suitable for swimming and general housework, 100 meters waterproof watch, can be used for swimming and diving and other underwater work.
Waterproof structure1 、 thread tightening waterproof structure. This is the most common and the most important form of waterproof watches, made in China by this kind of structure. It is characterized by a back cover and a case with a threaded connection, pressure and a sealing washer, edge of the rear there are 8, 10, 14 other symmetrical corners, the meter can be used to open up. The Soviet Union's "flying", "Russia" and other brands, although the bottom without thread, another thread closed after the ring should also belong to this category.2, withdrawal pressure waterproof structure. The bottom shell is a concave steel bowl, the watch machine is installed in the steel bowl, the pressure tight ring and the table cover are covered, and the main shell frame is closely connected with the watchcase, and the waterproof performance is good. It is not the case of thread, rounded edges, the edge of the lid and a sealing washer, by squeezing together, use the blade open. Only dry string (commonly known as the rod) for the double bar, the junction is easy to store water rust. Imports of "Rome" table for this category.3 、 waterproof structure of knife back cover. This waterproof watch is often overlooked by the herd and is mistaken for a general list. It is the same with the sword, and ordinary table cover, but well, handle table, cover the same rubber pad ring, also can have waterproof function. A great reputation of "OMEGA table has used this waterproof structure.4, bite mouth waterproof structure. The difference between the utility model and the thread bite type is that the screw is provided with a screw thread, and the main shell frame and the bottom shell are provided with concave and convex notches to bite each other. The selection of structure only in "Yingnage" brand watches.

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