Children from 0 to 6 years old perceive the world intuitively through sensory stimuli such as color, shape and sound. As long as the lively colors or interesting shapes match, they can arouse their strong interest.
Kumanju reminds you: when buying furniture, pay special attention to the color and shape. Do n’t choose children who are in the red and green furniture stage because parents do n’t like it. They are lively and active and have low recognition ability. Pay attention to safety, for example, choose a round or curved table corner and a sturdy and unbreakable table. If there are sharp edges and corners, they must be equipped with round plastic safety anti-collision corner pads. In addition, like the power hole, it is best to plug it with a specially made insulating object to prevent children from getting an electric shock.
Compared with children before the age of 6, children who develop in adolescence will be more casual in terms of furniture requirements. As they age, they pay more attention to function in the choice of furniture. Many teenagers choose modular furniture, and the colors tend to be more neutral, such as orange, yellow, green, etc. Some children also start to choose their favorite colors. On the basis of respecting the wishes of children, parents should consider leaving enough space for study and use when choosing this type of furniture.
Kumanju reminds you that the children at this stage are in the growth and development stage. The bones and spine are not fully developed in place. The seat surface of the chair should not be too soft and strong enough. In addition, when choosing the corresponding style and size, the height of the tabletop and chair must be just right, so as to avoid children from causing myopia, considering that they are growing their bodies, the height of the table and chair is preferably adjustable. For more furniture information, please visit http://news.gojiaju.com/ Welcome to provide news interview clue ads / news hotline to 8004
A ring split at one point and bent into a helical shape. This causes the washer to exert a spring force between the fastener's head and the substrate, which maintains the washer hard against the substrate and the bolt thread hard against the nut or substrate thread, creating more friction and resistance to rotation. Applicable standards are ASME B18.21.1, DIN 127 B.
Spring washers are a left hand helix and allow the thread to be tightened in a right hand direction only, i.e. a clockwise direction. When a left hand turning motion is applied, the raised edge bites into the underside of the bolt or nut and the part that it is bolted to, thus resisting turning. Therefore, spring washers are ineffective on left hand threads and hardened surfaces. Also, they are not to be used in conjunction with a Flat Washer under the spring washer, as this isolates the spring washer from biting into the component that will resist turning.
The use and effectiveness of spring lock washers has been debated, with some publications advising against their use on the grounds that, when tight, the washer is flat against the substrate and gives no more resistance to rotation than a normal washer at the same torque. However, a spring washer will continue to hold the bolt against the substrate and maintain friction when loosened slightly, whereas a plain washer will not.
The benefit of spring lock washers lies in the trapezoidal shape of the washer. When compressed to loads near the proof strength of the bolt, it will twist and flatten. This reduces the spring rate of the bolted joint which allows it to maintain more force under the same vibration levels. This prevents loosening.
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