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With the development of technology, the waterproof performance of watches has become one of the important standards for measuring their quality. To ensure that watches can still operate stably under various environmental conditions, manufacturers continually innovate waterproof designs. Especially for watches with a stainless steel back design, the design of the waterproof structure is crucial. This article will detail several common waterproof structures of water-resistant stainless backs and their features.
Water-resistant stainless backs with press-fit structures are a common waterproof design, mainly used for the joint sections of the watch case and the back cover. This structure utilizes the principle of interference fitting, combined with O-ring seal components, to ensure the waterproof effect of the watch during daily wear. The O-ring serves as a seal, and the pressure machine presses the upper sleeve or back cover into the watch case to form a seal. However, over time and with increased usage, the O-ring may elastically deform due to prolonged pressure, causing the fitting surface to loosen, and thus, affecting the waterproof performance. Regular inspection and replacement of the O-ring are necessary to maintain the waterproof effect.
Water-resistant stainless backs with "I"-shaped seal structures are a design that integrates both sealing and connection functions. This structure is widely used in the upper sleeve section of the watch case and the glass section of the case. Since modern watch glasses typically use sapphire or quartz glass, these rigid glasses cannot be fitted into the case with an interference fit. Therefore, the "I"-shaped seal structure becomes a more ideal choice. This design utilizes the "I"-shaped seal to fill the fitting gap, while providing strong sealing performance, ensuring the watch's waterproof capability in daily use. It can effectively prevent water from entering and also block dust and other particles from getting in.
Water-resistant stainless backs with threaded structures achieve a secure seal through threaded components. This structure is widely applied to the back cover and crown sections of the watch case. The threaded structure, combined with O-ring seal components, allows the O-ring to deform more during the threading process, enhancing the sealing effect. The advantage of this design lies in its detachability, facilitating maintenance and replacement. The threaded structure is both simple and reliable, offering a high level of waterproof performance, suitable for watches requiring high waterproof ratings.
Water-resistant stainless backs with screw-locking structures ensure the stability of the watch by locking the case and back cover with evenly distributed screws. This design uses O-ring seal components to fill gaps, and screws tightly combine the case and back cover. The advantage of the screw-locking structure is that the evenly distributed screws ensure a firmer connection between the case and back cover, thereby enhancing the waterproof performance. This design is very suitable for watches that require high waterproof grades and durability.
