potentiometer tuning knob,touch film volume knob,Solid aluminum knob

Knob switches can be seen everywhere in our modern life. Knob switches are widely used in many places. Maybe we won't feel too strange and have a certain understanding more or less. But this seems to be a small switch. We may not understand it deeply to see what kind of knowledge this little thing has. Here we briefly introduce the use and structural features of the knob switch.

Generally, for those old-fashioned traditional TV sets, there will be a knob switch, and the rotation of this area will have a certain range, so the resistance value will change when the switch is switched. Now the fan has several gears, so there are several sets of rotary switches to export, that is, to change the rotation speed of different gears by changing the rotation times of the fan around the fan. The structure of the potentiometer tuning knob switch is unipolar unit and multi-level unit structure. The unipolar unit structure is used together with the rotating shaft electrical appliance. The multi-level unit potentiometer tuning knob switch is used for most line switch types. There are two differences in the design structure of this type of switch. The difference between the two types is MBB contact type and BBM contact type. The MBB contact type is characterized by that when it is in contact with the front and rear contacts, the front contact will be disconnected during switching to maintain contact with the rear contact. The BBM contact type is characterized by conversion. The contact will first contact before disconnection, and then connect to the connection. During the conversion process, it has a state of disconnection with the front and rear contacts.

The Solid aluminum knob switch has many uses and can be used to replace some rotation of the pulse generator. Therefore, this switch is almost always used in the front panel of the instrument and the man-machine interface of the audio and video control panel. Rotary switches use orthogonal optical encoders as pure digital devices to replace analog potentiometers. Their appearance is similar to resistance potentiometers, but the internal structure of these rotary switches is completely digitized and used in optical technology. The internal structure of the switch is completely digitized, not only using optical technology, but also using the traditional incremental encoder. The two products are very similar. Even though channel A and channel B can be directly connected to the encoder processing chip, they also have two quadrature output signals. The switch has a cylindrical appearance.

Terminals are distributed around the "tube". These terminals are the extension of the "tube" static contacts, which are evenly distributed in the "tube" and insulated from each other. The rotary switches of fixed contacts without layers are insulated from each other, the shaft forms a rotating handle from the bottom of the top cover, and the bottom plate and the top cover are clamped up and down to form a switch assembly. When in use, there are 90 degrees, 180 degrees and 360 degrees of rotation, each rotating to a position, the moving contact piece is connected to different static contacts, and the external terminals output different states to achieve control.

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