Common sense about push button switch

来源:Dongguan Yanghan Industrial Co., Ltd.  时间:2022-05-26

In fact, the self-locking push button switch and the tact switch describe the switch function from different aspects; "self-locking" means that the switch can maintain a certain state (on or off) through a certain organization, and "tact" means that the operation switch is used. of strength. self-locking switch
Generally speaking, mechanical switches may be able to distinguish as follows:
The switch is divided into knob type, plate type (including button switch, boat switch) and button type in terms of operation mode; most of the knob type and plate type switch can be maintained (determined) in the on or off state after operation. , such as the daily use of light switches, fan speed control switches, most of these switches do not need to focus on whether they are self-locking, because they have obvious "operation directions"; only button switches are pressed when they are used, and most buttons are used. The switch is used to connect or disconnect the circuit when it is pressed, and the state is restored after the release, so it is sometimes called "bell switch". A self-locking device is added, and the self-locking function is used, so that it can also keep on or off by itself. This is a switch with self-locking. Among them, for a certain requirement, only one of several switches is allowed during operation. In the connected state, when the others need to be disconnected, several push-button switches are combined side by side, and the "interlocking mechanism" is used, only one switch is allowed to be in the connected state, and when the other switch is pressed, the switch is determined. , but at the same time the original switch was released (such as the "play, fast forward, rewind" mechanical button on a tape recorder). For these switches, the contacts can be in one or more groups; there are also many kinds of determination mechanisms, among which the most commonly used is to use a spring hook to slide along the heart-shaped groove, and the two tips of the heart-shaped groove correspond to the determination and release positions of the switch .
According to the literal meaning, "light touch" means that the state of the switch contacts can be changed without much effort, so the contact capacity is very small, and the structure is simple. A single-contact button switch that can be pressed with a small amount of force without a certain contact. Now, membrane switches and small micro switches can be regarded as tact switches. Most of the structures are made of two mutually insulating films. Printed conductive lines on the film , connect the lines to each other by pressing; or use a butterfly shrapnel made of thin elastic metal to press the shrapnel to connect the printed circuits.
In fact, the self-locking switch and the tact switch on the rice cooker and electric kettle describe the switch function from different aspects; "Touch" is to indicate the force used to operate the switch.