Safety hammer,everyone must be familar with the red hammer in the compartment.In an emergency ,you can escape from the window.The safety hammer is also known as a life-saving hammer.It is gener ally installed in a car and other places that are easily accessible.In an emergency such as a fire or a car falling into the water,it is convenient to take out and smash the glass window door to escape.But do you know how to smash the window?Do you know how the smash the window?Do you how the safe-ty hammer differs from a normal hammer?
The material of modern windows is mostly tempered glass.The tensile strength and impact resistance of tempered glass are several times higher than ordinary glass,and it is not easy to be broken.Even if it is broken,it will not be broken into sharp pieces,but broken pieces.Compared with ordinary glass,the damage to the human body is greatly reduced and the safety is high.Because of these characteristics, tempered glass is commonly used in windows,partition walls and cabinet doors.Of course,tempered glass also has soft ribs,the middle part of which is the strongest,and the four corners and edges are the most vulnerable.Ordinary flat glass,such as the mirror used on weekdays,is broken accidentally.If you want to smash it,it will be broken when you use any tool to tap it at will.The most effective way knock the glass with a safety hammer.The edges and the four corners,especially the most intermedi-ate part of the upper edge of the glass.If you him with a normal hammer,it may not move.At this time,
it is necessary to see the safety hammer.
Physics tell us that when a certain force acts on a certain place,the smaller the contact area,the more obvious the effort of pressure,and the force per square meter,that is,the pressure,and the force per square meter,that is,the pressure is also greater.When the hammer is used for pry the glass,since the contact area of the tip is small,the pressure at the contact point is relatively large,and it is easy to open the notch.For tempered glass,numerous spider web cracks are generated in an instant,and the glass fragments can be removed by gently rubbing it with a hammer.
