With the rise of wearable devices, children's smart watches are also rising in the market trend. Children's smart watches have almost become "standard" for children, and are exported to the EU, the United States and South Korea in large quantities, and the corresponding quality inspection problems also follow. Come, the recall of children's electronic watches has caused huge losses, and the test library inspection provides professional third-party children's smart watch inspections.
On April 22, the Australian ACCC notified a case of a recall of children's smartwatches. The reason for the recall was that the battery buckle was not strong, and the button battery may cause suffocation or serious illness to children.
Children's smart watch inspection specification standard GB/T 41411-2022, this standard will be officially implemented on November 1, 2022. It specifies the inspection requirements for children's watches and the inspection methods for children's smart watches.
1. Use reliability
1.1 Observe the working and display status of the children's watch, press the function buttons of the children's watch, and check the working status of each function of the children's watch. Children's watches should not stop under normal conditions of use, and parts, parts and components should not fall off by themselves;
1.2 The digital display of the liquid crystal children's quartz watch and pointer, and the liquid crystal digital children's quartz watch should be normal, there should be no missing strokes, ghosting and no display, etc., and the function keys should be flexible and reliable. The digital display of the children's smart watch should be normal, and the function keys should be flexible and reliable.
2. Vibration resistance
The children's watch should not stop after the vibration resistance test, and the parts and components should not be loose or damaged. In addition, different types of children
Quartz watches should also meet the following corresponding requirements:
- The variation of the instantaneous daily difference before and after the test of the liquid crystal children's quartz watch shall comply with the relevant regulations:
- The actual error before and after the test of pointer type children's quartz watch and pointer, liquid crystal digital children's quartz watch should not exceed 10s;
- The digital display of the LCD children's quartz watch and hands, and the LCD digital children's quartz watch should be normal.
3. Waterproof performance
For children's watches marked with "waterproof", the waterproof performance shall comply with the provisions of GB/T30106. The display should function normally during and after the test.
4. Shockproof performance
For children's watches marked with "shockproof", their shockproof performance shall meet the requirements for quartz watches in GB/T38022. Children's watches without the "shockproof" mark should not stop after the shockproof performance test, the liquid crystal display is normal, and the zeros, parts and components should not be loose, fall off or damaged.
5. Corrosion resistance
After the children's watch has been tested for corrosion performance, there should be no visible corrosion spots, corrosion deposits and salt precipitation on the surface of the watch case and its accessories.
6. Anti-static properties
Liquid crystal children's quartz watches and pointers, liquid crystal digital children's quartz watches and children's smart watches should not stop or reset during and after the anti-static performance test, and the display and watch operating parts should function normally after the test.
7. Chemical Properties
The content of migratory elements, limited plasticizers, nickel release, and the limit of harmful substances in leather materials in the accessible parts and parts of children's watches that come into contact with the human body should all meet the relevant requirements.
8. Overlay Adhesion
On the test area of the case or strap of the children's watch, use a ruler and a hard steel knife with sharp corners to draw a 2mmx2mm square. Apply enough pressure so that the scribe can cut the cover layer to the base material in one pass; after that, stick the cover layer of the test area with 29N/cm~3.3N/cm adhesive tape with no residue and adhesive force and be careful squeeze out air bubbles. After 10s, tear off the tape quickly with a force perpendicular to the surface of the dry cover, and use a low-power microscope to examine the surface of the cover and the tape.
After the watch case and the strap of the children's watch with the covering layer have undergone the adhesion test, the surface of the covering layer should not have cracks, blistering, separation, or falling off.
9. External force resistance of accessories
Synthesize the strap buckle of the children's watch into a ring, apply a static tension F of 50N to the strap as shown in the figure below and keep it for more than 5s. After the test, check the accessories of the children's watch. After the children's watch has undergone the external force resistance performance test of the accessories, there should be no parts falling off and cracking in the connection parts and straps of the watch.
10. Resistance to tension and torsion fatigue
After the children's watch has undergone the tensile torsion fatigue test, the watch strap should be free of cracks or breaks. The elongation of the plastic strap should not be greater than 3%, and the deformation of the buckle hole of the strap should not be greater than 50%.
11. Appearance
Under the condition that the illuminance value of the inspection work surface is not less than 600lx, the inspection shall be carried out at the clear sight distance from the inspector.
- The dial surface of the children's watch should be clean, the various character patterns should be accurate and clear, and there should be no obvious defects and flaws.
- The glass, back cover and inlaid decorative parts of the children's watch should be firmly matched with the watch case, and there should be no obvious gaps and defects at the connection. Watch glass should be clean and clear.
- The exterior parts of children's watches should not have obvious pitting, scratches, burrs, sharp edges and other defects that affect safe wearing and use. Its design shape should not cause harm to the human body.
- Safety warning signs: by visual inspection. Children's watches should have Chinese safety warning signs on the instructions, labels and signs or packaging: Safety warning signs should be eye-catching, easy to read, easy to understand and not easy to wipe off: Safety warning signs should be similar to the following:
"Warning! Not suitable for children under 3 years old. Contains small parts."
Warnings about specific hazards should be marked on the children's watch packaging or instructions for use.
12. Operating temperature
The smart watch for children should work normally within the operating temperature range of -5°~50°.
13. Static positioning
The static positioning performance of the children's smart watch in the hot start state should meet the requirements of the following table. Among them, the effective positioning rate is the number of effective positioning divided by the total number of static positioning tests: the average distance error is the arithmetic mean of the positioning distance error under effective positioning; the average positioning time is the arithmetic mean of the positioning time under effective positioning.
14 calls
Children's smart watches with call function shall have the network access license of telecommunication equipment and the approval license of radio transmission equipment type.
15 Electromagnetic radiation
The local exposure limits of electromagnetic radiation of children's smart watches should meet the requirements of the following table.
Electromagnetic Radiation Local Exposure Limits
16. Information Security
16.1 Upgrade functio
-Should support the update and upgrade of children's smart watch operating system.
-At least one security mechanism should be adopted, and encrypted transmission should be adopted to ensure the security during the upgrade process.
16.2 Identification
Children's smart watches should have the following identification functions:
- The user identity should be identified and authenticated, the identity identification should be unique, and there should be no duplicate user identification: - Security protection of the user's authentication credentials to prevent leakage and tampering of the authentication credentials;
- Functions such as login failure processing and timeout security processing should be provided, and measures such as locking the user account or ending the session after continuous login failures, and automatically logging out when the user session connection timeout occurs;
- When the mobile application or management platform uses a password to log in, the user should be forced to modify the initial password when logging in for the first time, and the complexity of the password should be checked;
- When the user identity authentication information is lost or invalid, the authentication information reset or other technical measures should be adopted to ensure the security of the system.
16.3 Access Control
Children's smartwatches should have the following access control features:
- Access control functions should be provided. Assign accounts and permissions to logged in users:
- Different users should be granted the minimum authority required to complete their respective tasks, and a mutually restrictive relationship should be formed between them.
16.4 Data Security
Children's smartwatches should have the following data security features:
- The data validity check function shall be provided to ensure that the content input through the man-machine interface or through the communication interface meets the system setting requirements;
-Cryptographic technology should be used to ensure the integrity and confidentiality of important data during transmission and storage, including but not limited to authentication data, important business data and personal sensitive information.
16.5 Personal Information Protection
Children's smartwatches should have the following personal information protection requirements:
- The purpose, method and scope of the collection and use of personal information should be clearly stated;
- Personal information should be collected, stored and used after obtaining the user's consent, and for sensitive personal information, the user's express consent should be obtained;
- Only personal information necessary for business shall be collected, stored and used;
- Unauthorized access and use of personal information shall be prohibited;
- The user's right to correct, delete personal information, and cancel the account should be guaranteed.
16.6 Battery Safety
The performance of lithium batteries used in children's smart watches should meet the requirements of GB31241.
16.7 Safe charging
Children's smart watches should be designed in a way that cannot be used when charging, and the charger should comply with the relevant regulations of GB49431.
16.8 Wearing a safe temperature
The surface temperature limit of the external accessible parts of the children's smart watch shall comply with the provisions of Table A3.
Surface temperature limits for externally accessible parts
17. Standby time
Children's smartwatches should meet their stated standby time.
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