按钮开关是一种利用按键来推动传动机构，从而使动触点和静触点连接或者是断开，并且能够实现电路转换的一种开关。

　　Push button switch is a kind of switch that uses the key to push the transmission mechanism, so that the moving contact and the static contact are connected or disconnected, and can realize the circuit conversion.

　　按钮开关的结构种类也是十分丰富多样的，有蘑菇头样式的、自锁式、自复位式、旋柄式、带指示灯式的等等，还有单扭的、双扭的、三扭的和不同的组合形式。

　　There are also various types of button switch structures, such as mushroom head type, self-locking type, self reset type, rotary handle type, with indicator light type, etc., as well as single twist, double twist, triple twist and different combination forms.

　　按钮开关通常是积木式结构的，按钮开关结构包括按钮帽、复位弹簧、固定触点、可动触点、外壳和支柱连杆等，可以分为几种类型，在这里可以给大家介绍一下。

　　Button switch is usually of building block structure. The structure of button switch includes button cap, return spring, fixed contact, movable contact, shell and pillar connecting rod. It can be divided into several types, which can be introduced here.

　　常开触头的也叫做动合触头，指的是在原始状态，电器没有受到外力的情况下，固定触点可以和可动触点处于一种分开的状态之下的触头。

　　Normally open contact is also called dynamic contact, which refers to the contact that can be separated from the movable contact in the original state without external force.

　　常闭触头也叫做动断触头，指的是在原始状态电器同样不受外力下固定触点和可动触点处于一种闭合的状态下的触头。

　　Normally closed contact is also called dynamic breaking contact, which refers to the contact in which the fixed contact and movable contact are in a closed state under the same external force.

　　常开按钮开关，在没有按下的情况下，触头是断开的状态，当按下厚触头就会闭合接通，松开以后按钮开关就会在复位弹簧的作用之下复位断开。在控制电路中，按钮开关也被用作来启动电动机，因此也被称为启动按钮。

　　Normally open button switch, in the case of not pressed, the contact is disconnected. When the thick contact is pressed, it will be closed and connected. After releasing, the button switch will be reset and disconnected under the action of the reset spring. In the control circuit, the button switch is also used to start the motor, so it is also called the start button.

　　常闭按钮开关则是正好和长开开关相反，没有按下的情况下，触头保持闭合的状态，当按下时就会在复位弹簧的作用之下复位闭合。常闭按钮常常被使用于控制电动机停车，所以也被称作为复位按钮。

　　The normally closed button switch is just opposite to the long open switch. When it is not pressed, the contact will remain closed. When pressed, it will be reset and closed under the action of the return spring. Normally closed button is often used to control motor stop, so it is also called reset button.

　　最后一个是复合按钮开关，它是一种将常开和常闭按钮开关组合到一起的按钮开关，具有常闭触头和常开触头。在没有按下时，常闭触头时闭合状态，常开触头则是断开的状态。当按下按钮时，常闭触头就会自动断开，常开触头就会跟着闭合，我们可以认为这是一种自锁式的按钮。当松开按钮时，按钮开关就会在复位弹簧的作用之下把常开触头断开然后将常闭触头闭合。这种按钮开关常常被用于连锁控制电路当中。

　　The last one is the composite button switch, which is a push-button switch that combines normally open and normally closed button switches, with normally closed contacts and normally open contacts. When not pressed, the normally closed contact is closed and the normally open contact is disconnected. When the button is pressed, the normally closed contact will automatically open, and the normally open contact will close with it. We can think of this as a self-locking button. When the button is released, the button switch will open the normally open contact under the action of the return spring, and then close the normally closed contact. This kind of button switch is often used in interlock control circuit.