Toggle switch to select the information. Toggle switch to select knowledge. Toggle switch purchase method, toggle switch purchase instructions, how to choose the best toggle switch? Toggle switch selection introduction. Toggle switch selection recommendation. Toggle switch preferred toggle switch electrical products factory
Toggle switch The embodiment of the present invention discloses a toggle switch device, which comprises a toggle button, a toggle switch and a housing of an electronic device with a toggle button. The electronic device housing is provided with a mounting hole, corresponding to the mounting hole. The rib is protruded from the inner side wall of the casing, and the rib is provided with a buckle. The toggle key comprises an operation part, a mounting part and a toggle part, and the dial part is open on one side and has a U shape. The utility model improves the uniformity of the matching gap between the toggle key and the nested shell, improves the appearance grade, improves the assembly sequence and the assembly method, improves the assembly efficiency, reduces the cost, and reduces the assembly failure. The rate increases the reliability of the use of the toggle button.
The utility model discloses a toggle switch, which comprises an outer shell and a base cover. The cavity formed by the outer shell and the base cover is provided with a push seat, a contact bridge and a terminal, and the contact bridge is an integrally formed elastic metal contact. bridge. Since the conductive conversion part of the toggle switch provided by the utility model directly uses an elastic metal contact bridge, the original contact bridge and the elastic element are combined into one. The general elastic element is a spring or a spring piece, and the tact switch and the toggle The industry in which the switch is most dependent [toy industry] simplifies the installation process, simplifies the assembly of the cumbersome contact bridges and elastic components in the assembly process, and simplifies the components, thereby reducing material costs and additionally Compared with the structure of the traditional elastic element and the contact bridge, the elastic metal contact bridge of the metal part has the basic principle of the toggle switch, and the structure is more robust, and can withstand repeated use for a long time without being prone to failure or damage.
Also using PC materials, many switch manufacturers use domestically produced products (even if the US GE is actually used by domestic cooperative factories, but only sold by GE), but currently there is no company in China that has the ability to produce PC materials, the so-called domestic production is generally reworked with recycled materials, so the impurities are relatively high, it will be very brittle, and the heat resistance is also obviously poor. Poor switches are used to reduce costs. The front panel may not be populated with PC material and replaced with mix or ABS. These materials are not only resistant to impact and heat, but also prone to discoloration and appear rough when the surface is touched.
Look at the housing material first. The main switch brands in the market generally use PC materials. PC materials are also called bulletproof rubber. The characteristics of impact resistance, high temperature resistance and non-discoloration are very important for controlling electrical switches. The better front panel and the back base are made of PC material, and the general switch will replace the PC material with black nylon material on the base, so the cost can be reduced a lot.
Secondly, the contact is the contact point of the conductive part during the switching process. The size of the contact depends on the size (the bigger the better), the second depends on the material. There are currently three main types of contacts, silver-nickel alloy, silver-cadmium alloy and sterling silver. Silver-nickel alloy is an ideal contact material at present, and its conductivity and hardness are relatively good, and it is not easy to oxidize and rust.
Silver-cadmium alloy contacts are also better in other aspects, but the cadmium is a heavy metal. On the one hand, it is harmful to the human body. On the other hand, the fusion with silver is not ideal. It will form small particles of cadmium metal on the surface of the contact, and conduct electricity. When the arc may be pulled out, the computer basics multiple choice questions.
The contact of sterling silver is not suitable. The conductivity is good, but the texture of sterling silver is soft and it is easy to oxidize (like silver jewelry will turn black after a long time). The texture is soft, the switch is deformed when the switch is more; the oxidation performance is much worse when the oxidation is rusted, the rust point is also prone to heat, and the contact is easily burned.
Kesta Switch Factory
A dumbwaiter is a small freight elevator or lift intended to carry objects rather than people. Dumbwaiters found within modern structures, including both commercial, public and private buildings, are often connected between multiple floors. When installed in restaurants, schools, kindergartens, hospitals, retirement homes or in private homes, the lifts generally terminate in a kitchen.
The term seems to have been popularized in the United States in the 1840s, after the model of earlier "dumbwaiters" now known as serving trays and lazy Susans. The mechanical dumbwaiter was invented by George W. Cannon, a New York City inventor. Cannon first filed for the patent of a brake system (US Patent no. 260776) that could be used for a dumbwaiter on January 6, 1883. Cannon later filed for the patent on the mechanical dumbwaiter (US Patent No. 361268) on February 17, 1887.Cannon reportedly generated a vast amount of royalties from the dumbwaiter patents until his death in 1897.
A simple dumbwaiter is a movable frame in a shaft, dropped by a rope on a pulley, guided by rails; most dumbwaiters have a shaft, cart, and capacity smaller than those of passenger elevators, usually 45 to 450 kg (100 to 1000 lbs.) Before electric motors were added in the 1920s, dumbwaiters were controlled manually by ropes on pulleys.
Early 20th-century codes sometimes required fireproof dumbwaiter walls and self-closing fireproof doors and mention features such as buttons to control movement between floors and locks on doors preventing them from opening unless the cart is stopped at that floor. Dumbwaiter Lifts in London were extremely popular in the houses of the rich and privileged. Maids would use them to deliver laundry to the laundry room from different rooms in the house. They negated the need to carry handfuls of dirty washing through the house, saving time and preventing injury.
A legal complaint about a Manhattan restaurant's dumbwaiter in 1915, which also mentions that food orders are shouted up and down the shaft, describes its operation and limitations as follows:
[There is] ... great play between the cart of the dumb-waiter and the guides on which it runs, with the result that the running of the cart is accompanied by a loud noise. The rope which operates the cart of the dumb-waiter runs in a wheel with a very shallow groove, so that the rope is liable to and does at times slip off. ... The cart has no shock absorbers at the top, so that when it strikes the top of the shaft or wheel there is a loud report. ... [T]he ropes of the dumb-waiter strike such wall at frequent intervals with a loud report. ... [T]he dumb-waiter is often negligently operated, by running it faster than necessary, and by letting it go down with a sudden fall.
More recent dumbwaiters can be more sophisticated, using electric motors, automatic control systems, and custom freight containers of other kinds of elevators. Recently constructed book lifts in libraries and mail or other freight transports in office towers may be larger than many dumbwaiters in public restaurants and private homes, supporting loads as heavy as 450 kg (990lbs)
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