The only difference between the lighted self-locking key switch and the ordinary self-locking key switch is that the lighted switch makes full use of the space in its key to place a small light bulb or LED, one end of which is connected to the zero line, and the other end is generally connected through a Only the step-down resistor is connected in parallel with the normally open contact of the switch. When the switch is closed, the device operates and also provides power for the indicator light. Its types include diagonal simultaneous switches, parallel simultaneous switches, and spanning simultaneous switches.
In fact, with self-locking button switches and tact switches describe switch performance from different aspects; "self-locking" means that the switch can pass the locking mechanism To maintain a certain state (on or off), "tap" is the force used to operate the switch. Generally speaking, mechanical switches may be distinguished 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 kept (locked) 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 emphasize whether they have self-locking, because there is an obvious "operation direction"; only button switches, which are pressed when used, most The button 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". Like ordinary switches, a self-locking device is added. Using the self-locking performance, it can also keep on or off by itself. This is a switch with self-locking. For certain needs, several switches are working. Only one of them is allowed to be connected, and when the rest must be disconnected, several push-button switches are combined side by side, and an "interlocking mechanism" is used to allow only one of the switches to be connected and locked, and when the other switch is pressed , the switch is locked, but at the same time the original locked switch is released (such as the "play, fast forward, fast reverse" mechanical buttons on a tape recorder). These switches can have one or more sets of contacts; there are also various locking mechanisms, among which the most widely used is to use a spring hook to slide along a heart-shaped groove, and the two tips of the heart-shaped groove correspond to the lock and release positions of the switch.
The switches on rice cookers and electric kettles are locked after being pressed, but when heated to a specified condition, the magnets or bimetals that lock the button switch state action to reset the switch and cut off the power supply at the same time (the rice cooker is switched to the heat preservation state), which may not meet the requirements of "reset after power failure".
Reset after power failure, that is, the work of the locking mechanism should be related to the power supply, and the finished product does not seem to have it, because this requirement can be achieved by using a circuit composed of a general button switch and a relay; but if only one relay (or contactor) is used, one of the A group of normally open contacts is used to control the power supply of the working coil of the relay (contactor), and the relay weighing iron is used as a switch button. After pressing the weighing iron, the contacts of the relay control coil are closed, the coil is energized, and the relay remains closed ( Self-locking), the rest of the contacts control other circuits; once the power supply is cut off, the relay is cut off immediately, the weighing iron is reset, and the equivalent button is reset. It is necessary to press the relay weighing iron again to turn on the power again. The relay is now quite a push button switch with an energized lock.
Augo Electronics Factory Introduction
Dongguan Ogo Electronics Co., Ltd. is A professional company dedicated to high-quality electronic and electrical switches and sockets, the main products are: toggle switches, tact switches, micro switches, vibration switches, direct key switches, key switches, micro switches, leaf switches, push button switches, Rocker switch; sockets: headphone socket, DC power socket, AC power socket; connectors: USB connector, battery connector and other products. Products are widely used in household appliances, car navigators, remote controls, electronic toys, computer peripherals, tape recorders, repeaters, office equipment printers, communication equipment mobile phones, Bluetooth, massagers, video doorbells, digital cameras, digital Photo frames, medical equipment, etc. For the research and development of new products for customers, we keep pace with the times, and constantly innovate and develop new products to meet the market demand of the latest electronic products.
Oko Electronics Co., Ltd. plant and equipment diagram
Ogo Electronic Qualification Certificate
Key Switch Usage Notes
1. When checking the touch switch during routine maintenance, we should pay attention to whether the key switch has become fragile, deteriorated, decreased in flexibility, or cracked due to time aging. . Many materials of the key switch themselves have the effect of dustproof and electricity isolation, and attention should be paid to maintenance during daily use. People can start from the power isolation material of the key switch to eliminate more hidden dangers of consumption.
2. Due to the high flexibility of the key switch, be careful not to squeeze too hard when pressing. Since the principle is the same whether it is the control button on the fine instrument or the button on the simple one, it is assumed that pressing or tapping with great force will reduce the flexibility of the key switch itself.
3. If you find that the key switch has abnormal operation, remember not to suspend the disassembly without authorization. In the absence of a professional maintenance environment, many high-end electrical products need to be unpacked in a dust-isolated environment. It has the effect of conducting electricity, which is a very risky practice, and it is easy to further damage the switch. Therefore, the inspection and maintenance of the illuminated key switch must be suspended in a special environment.
The purpose of the key switch
To say that the products often used by key switches are the electronics industry, because the TVs, stereos and previous video recorders we often use will use key switches. Computers used in offices, game consoles that can be seen in game halls, fax machines used by companies, walkie-talkies used by security guards, company printers, copiers, machine tool control equipment in workshops, some instruments and our home use some household appliances.
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