During the summer vacation, children have more contact with toys, but now many new toys have hidden dangers, such as laser pens, darts in anime Naruto, toothpick crossbows …
Not long ago, Xiao Wang, a member of the fire brigade in Lucheng District, Wenzhou, repeatedly saw primary school students playing with laser pens when he was in fun run on the Oujiang River. He thought it was time to remind them. Subsequently, Lucheng Fire Brigade made an experiment and found that the laser pen can instantly light matches and penetrate 8-story newspapers in 20 seconds, which is self-evident.
The sponge was cut 10 cm. Urban express map
The online shopping platform has blocked the "laser pen" search, but it can be found with "laser flashlight" and "pointing star pen"
In 2014, the exposure of laser pens at CCTV’s "March 15th" party will burn children’s eyes. Last year, the General Administration of Quality Supervision, Inspection and Quarantine released the "Investigation Results on the Quality and Safety of Products Protecting Children’s Eyes", and laser pens ranked first among children’s products with great safety hazards.
Since then, the online shopping platform has blocked the keyword search of "laser pen", and Baidu also suggested in a prominent position that "laser pen may cause retinal damage or even blindness in children, so parents should keep children away from laser pen."
But in reality, there are still many children playing with laser pens. Xiao Wang of Lucheng District Fire Brigade saw the children playing with laser pens on the riverside, so he bought one from Taobao, with a power of 5 watts and five pens, which was a total of 270 yuan.
The instructions for the use of this laser pen say "light matches and firecrackers within 3 meters" and so on. Xiao Wang thinks that there is no need to light matches and firecrackers with a laser pen in real life. Merchants are inducing consumers to buy them as toys.
Since the online shopping platform has blocked the "laser pen" search, how did Xiao Wang find it? He said that you can find it by changing the keywords into "laser flashlight" and "pointing star pen".
Yesterday,The reporter searched with "laser flashlight" and "stylus" on an online shopping platform and found that there were hundreds of pages of results. Among them, the monthly sales volume of a laser pen with tens of dollars is 9743, and many customers in the evaluation column say it is for children to play with.
Six groups of experiments tell you how hidden dangers the laser pen has.
Lucheng District Fire Brigade conducted experiments on laser pens, including mosquito-repellent incense, newspapers, foam, matches, plastic bags and so on.
After 1 minute, the mosquito-repellent incense was burned with white spots. Urban express map
Experiment 1: 1 minute, the mosquito-repellent incense was burned with white spots.
Firefighters put laser pens and mosquito-repellent incense on two small tables, separated by about 1 meter. Turn on the laser pen and let the light shine on the mosquito-repellent incense. After 10 seconds, you can smell the smoke of the mosquito-repellent incense being lit, and after 1 minute, the mosquito-repellent incense is burned to white spots.
20 seconds, breaking through 8 newspapers. Urban express map
Experiment 2: 20 seconds, breaking through 8 newspapers.
Overlap the newspapers, a total of 8 layers, put them on a small table, and aim the laser pointer at the newspaper 1 meter away. In 20 seconds, the light penetrated the newspaper and reached the back wall, and the newspaper was punctured into a small hole.
Experiment 3: Instantly ignite the match head.
The fireman opened the matchbox, and the whole box stood on the small table, and the laser pen was aimed at the matchhead. The moment the light touches, the match is lit.
After 1 minute, the chicken feet were burned to a black spot. Urban express map
Experiment 4: 10 seconds, scorching the chicken feet epidermis.
Chicken feet are used to simulate human skin, although they are thicker than human skin. The fireman put the chicken feet on the table and turned on the laser pen to illuminate. After 10 seconds, the chicken feet smell burnt and there is a cracking sound of oil burning. After 1 minute, the skin of chicken feet was burnt out with a blackened spot.
Experiment 5: The sponge was cut into a 10 cm hole.
The same two small tables, the laser pen and sponge are separated by 1 meter, and the light of the laser pen is aimed at the sponge and moves slowly, translating about 10 cm. After turning off the laser pointer, the sponge has been cut a big hole.
Experiment 6: Black plastic bag caught fire for 5 seconds.
Xiao Wang said that the laser pen can wear a pen and project patterns such as stars all over the sky on the plane. After wearing a pen, the laser is diffused and the lethality becomes smaller. In the case of close distance, it is also dangerous to wear a laser pen. They put the black plastic bag 5 cm in front of the laser pointer, and the plastic bag burned after 5 seconds.
More than a dozen children in Wenzhou have been blinded by laser toys.
Lucheng Fire Department reminds parents not to let their children touch laser toys, especially high-powered ones. From the perspective of fire prevention, the laser pen can ignite at a long distance, which has great hidden dangers.
But the biggest harm of laser pen is the damage to human skin and eyes. In general,The laser power that the human body can bear is about 0.4 MW, and the laser of about 1 MW directly enters the eyes, which will cause harm..
Last year, the Ophthalmology and Optometry Hospital affiliated to Wenzhou Medical University made preliminary statistics. In about two years, there were more than a dozen children who were injured by laser toys, basically boys of about 10 years old. One boy’s eyesight dropped from 1.5 to 0.25 after being injured by a laser pen, but he could not recover after treatment.
Mao Xinjie, director of the optometry diagnosis and treatment center of the Ophthalmology Hospital affiliated to Wenzhou Medical University, said that external objects or light are imaged on the retina through the eyes, and the macular area located in the center of the retina is the most sensitive and fragile area on the retina. After being irradiated by the strong light of the laser pen, it is easy to cause edema and bleeding in the macular area, and the vision is greatly reduced. Once you burn your eyes with a laser pointer, the damage will be permanent and most of it will be difficult to recover. The injured should go to the hospital as soon as possible, and strive for treatment before the burned part is scarred.
(The original title is "Lucheng Fire Brigade did an experiment: the" laser pen "can instantly light a match and break through an 8-story newspaper for 20 seconds")