The key switch mechanism and trouble shooting situation will be explained in detail today, because it covers a wide range of knowledge, mainly in these aspects of a brief introduction, in addition to a better fault solution.
The key switch includes an interconnected shell and a base cover. The cavity formed by the shell and the base cover of the waterproof light touch switch is provided with a push, a contact bridge and a terminal. The contact bridge is an elastic metal contact bridge formed as a whole.
Because the conductive conversion part of the switch provided by the DC power supply socket utility model directly uses an elastic metal contact bridge, which combines the original contact bridge and elastic elements into one. Generally, the elastic elements are springs or shrapnels, and the industries most dependent on the start of the switch and the switch are light touch switches, thus simplifying the installation procedure and making the contact bridge and elastic elements more complicated in the assembly process. The assembly of the parts is simplified, and the parts are simplified. The blade switch can reduce the material cost.
In addition, as an integral metal part of the elastic metal toggle switch, the contact bridge, compared with the traditional elastic components, cooperates with the structure of the contact bridge, the basic principle of the toggle start, its structure is more solid, can withstand repeated use for a long time and is not prone to failure or damage.
Processing requirements for surface treatment of switching start: smooth surface, uniform color, texture of power outlet, generally good products. In addition, the brand logo on the panel should be clear and full, and there should be no burrs on the surface.
The copper sheet at the beginning of the switching requires: thick copper sheet, normal closed switch to increase current passing capacity, reduce the resistance of the copper sheet itself; anti-oxidation, non-rusting, reduce the resistance increase and heating problems caused by rust;
Less riveting, the best is a piece of copper, further reducing the riveting part of the fracture and rivet heat; DC socket strong toughness, especially in the switching switch socket, not easy to deform. Even if the opening is used for a long time, the waterproof switch can maintain the appropriate clamping force, ensure that the socket is tightly connected with the plug, and reduce the arc.
Selection of Copper Plate for Toggle Switch:
1. The thickness of copper sheet improves the current passing ability, and the headphone switch reduces the resistance of copper sheet itself.
2. Strong toughness, especially for the switching switch socket, not easy to deform. Even if the switch is used for a long time, it can maintain the appropriate clamping force, ensure that the socket is closely connected with the plug, and reduce the arc. Small-sized toggle switch
3. Anti-oxidation, non-rusting, reducing the resistance increase and heating problems caused by rust. Five-way switch and gradually increase the power supply voltage to repair.
Fault example 1: Start-up will burn out the insurance, the output voltage is zero. This situation is usually due to the breakdown of the switch tube and the short circuit between the emitter and collector. At this time, the switch tube can be removed first, and the emitter and collector resistance to ground can be measured. If the headphone socket is zero or very small, it can be replaced. But it is also necessary to check whether there are any problems with its components before it can be turned on.
Fault Example 2: The grating appears "S-shaped distortion". This kind of problem should focus on the filter circuit and voltage stabilization circuit. Vibration switch is usually due to a diode circuit break, from full-wave rectifier to half-wave rectifier, which may also be due to the reduction of its filter capacitance capacity.
At present, this new type of photoelectric switch has been used in many fields, such as level detection, key switch level control, product counting, width discrimination, speed detection, fixed length shearing, hole identification, signal delay, self-locking switch automatic door sensing, color mark detection, punch and shearing machine and safety protection.
Above is the key switch in the mechanism and failure need to understand the problem, I hope you can better use this key switch.
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