Kääntökytkimet

Kääntökytkimet, also known as rotary switches, are electrical switches that change their connection between circuits by rotating a knob or lever. They are used to select different functions or settings in electronic devices. The rotary mechanism typically involves a central shaft connected to a moving contact that sweeps across a series of fixed contacts arranged in a circle. As the shaft is rotated, the moving contact connects to different fixed contacts, thereby altering the electrical path and controlling the operation of the device.

The design of kääntökytkimet can vary significantly depending on their application. They can have multiple poles and multiple positions, allowing for complex switching arrangements. For instance, a single-pole, double-throw (SPDT) rotary switch can select between two different circuits, while a multi-pole, multi-position switch can control several circuits simultaneously. The contacts are usually made of conductive materials like brass or silver, and the insulation is provided by plastic or bakelite.

Kääntökytkimet are found in a wide range of applications, from simple consumer electronics like stereo systems and washing machines to more complex industrial equipment and control panels. They are valued for their durability, reliability, and the ability to provide a clear visual indication of the selected setting. In some cases, kääntökytkimet can be designed with detents to provide a tactile feedback when a new position is selected, preventing accidental changes. The physical size and electrical rating of kääntökytkimet are chosen based on the specific requirements of the application, such as the voltage and current they need to handle.