The three-proof mobile phone is a mobile phone with slight dustproof, shockproof and waterproof functions, so it has always been loved by young users who love outdoor sports. With its professional waterproof, dustproof, and excellent anti-fall and anti-rolling performance, it can be competent for applications in extremely harsh weather conditions and special occasions.

Professionally used for outdoor sports, military and fashion. Outdoor sports type and military three-proof mobile phones, the three-proof level requirements are higher, can be used in harsh environments, such as water soaking, desert, strong impact and so on. This kind of rugged mobile phone is generally not very beautiful in appearance, looks more powerful, has relatively simple functions, and its thickness is generally between 16-25MM. The main users are outdoor adventurers, travel friends, and soldiers. This part of the product is mainly produced by some European and American companies. Fashionable rugged mobile phones have lower requirements on the level of ruggedness, mainly in terms of waterproofing. Such products have beautiful appearance, thickness can be made below 15mm, powerful functions, and can be loaded with intelligent systems. Users mainly like fashion young people Human, fashionable rugged mobile phones are mainly Japanese mobile phones, part of Korean mobile phones.

The key area of the three defenses of ordinary mobile phone structure is the gap between LCD, buttons, battery and plastic case. Three-proof structure design ideas: pay attention to the choice in the three-proof design. If it is a product with high three-proof requirements, the three-proof design must be taken as a main line. Other aspects are developed around the three-proof requirements, and there must be a clear three-proof Thoughts and overall thoughts should not be half-hearted in the design, because the pursuit of comprehensive results and neglecting the other will eventually lead to the failure of the three-proof design. The three-proof design needs to achieve the principle of "a design with one goal".

Three prevention standards

Based on the national three-proof technical standards, combined with the actual needs of the market and customers, the three-proof level is defined

There are three levels of standards, namely elementary, intermediate and advanced (professional level). The three levels are defined as follows:

Primary three-proof standard: IP56-Grade 5 dustproof grade, Grade 6 waterproof grade, 1.5M drop, regular vibration.

Intermediate three-proof standard: IP57-5 dustproof grade, 7 waterproof grade, 3M drop, regular vibration.

Advanced (professional) three-proof standard: IP68-6 dustproof grade, 8 waterproof grade, 5M drop, regular vibration

standard test

IPX 1

Method name: vertical drip test

Test equipment: drip test device;

Sample placement: Place the sample on the rotating sample table at 1r/min according to the normal working position of the sample, and the distance from the top of the sample to the drip opening is not more than 200mm;

Test condition: the dripping volume is 10.5mm/min;

Duration: 10min;

IPX 2

Method name: 15°drip test

Test equipment: drip test device;

Sample placement: make one surface of the sample form a 15° angle with the vertical, and the distance from the top of the sample to the drip opening is not greater than 200mm. After testing one side each time, change the other side four times;

Test condition: dripping water volume is 30.5mm/min;

Duration: 4×2.5 min (10 min in total); [2]

IPX 3

Method name: Water spray test

experiment method:

A, Swing tube water spray test;

Test equipment: swing-tube water spray test device;

Sample placement: Choose a swing tube with an appropriate radius, make the height of the sample table at the position of the diameter of the swing tube, place the sample on the sample table so that the distance from the top to the sample nozzle is not more than 200mm, and the sample table does not rotate;

Test conditions: The water flow rate is calculated according to the number of spray holes of the pendulum tube, each hole is 0.07 L/min. When water is sprayed, the middle point of the pendulum tube is 60° on both sides, and the water spray from the spray holes in the arc is sprayed to the sample. The test sample is placed in the center of the semicircle of the pendulum tube. The pendulum tube swings 60° on both sides of the vertical, a total of 120°. Each swing (2×120°) is about 4s;

Test time: continuous spraying water for 10 min

B, sprinkler water spray test

Test equipment: hand-held water spray test device;

Sample placement: make the parallel distance between the top of the test and the nozzle of the hand-held nozzle be between 300mm and 500mm;

Test conditions: A baffle with a balance weight should be installed during the test, and the water flow rate is 10 L/min;

Test time: Calculated according to the surface area of the tested sample shell, 1 min per square meter (not including installation area), at least 5 min;

IPX 4

Method name: water splash test

experiment method:

a. Swing tube splash test;

Test equipment and sample placement: the same as the above IPX3 item a;

Test conditions: Except for the conditions mentioned later, it is the same as the above IPX3 item a; the spray area is on each side of the midpoint of the swing pipe;

The water from the spray hole in the 90° arc is sprayed toward the sample. The test sample is placed in the center of the semicircle of the pendulum tube. The pendulum tube swings 180° on both sides of the vertical, a total of about 360°; each swing (2×360°) about 12s;

Test time: the same as the above IPX3 paragraph a (ie 10 min);

b. Sprinkler type splash test

Test equipment and sample placement: same as the above IPX3 item b;

Test conditions: Remove the baffle with counterweight installed on the equipment, and the rest are the same as the above IPX 3 item b;

Test time: Same as the above IPX3 item b, that is, calculated based on the surface area of the tested sample shell, 1min per square meter (not including the installation area)

At least 5min;

IPX 5

Method name: Water spray test

Test equipment: The inner diameter of the nozzle of the nozzle is 6.3mm;

Test conditions: Make the distance between the test sample and the water nozzle 2.5m～3m, and the water flow rate is 12.5 L/min (750 L/h);

Test time: Calculated according to the surface area of the tested sample shell, 1 min per square meter (not including the installation area) at least 3 min;

IPX 6

Method name: strong water spray test;

Test equipment: The inner diameter of the spray nozzle of the nozzle is 12.5mm;

Test conditions: Make the distance between the test sample and the water nozzle 1.5m～3m, and the water flow rate is 100 L/min (6000 L/h);

Test time: Calculated according to the surface area of the tested sample shell, 1 min per square meter (excluding installation area) at least 3 min;

IPX 7

Test equipment and test conditions: immersion tank. The size should be such that the distance from the bottom of the sample to the water surface is at least 1m after the sample is placed in the immersion tank. The distance from the top of the sample to the water surface is at least 0.15m; test time: 30 min;

Tag: rugged mobile phone, rugged tablet, rugged smartphone, military rugged phone, military tablet