Sliding rheostat with dust-proof structure

Abstract

The invention discloses a slide rheostat with a dustproof structure. The slide rheostat comprises a printed circuit board and a rheostat welded on the printed circuit board; a through chute is formed in the middle of the rheostat; a slide button is arranged in the chute; a dustproof gasket is connected on the chute of the rheostat; a thin strip structure is formed at a position, corresponding to the chute, of the dustproof cushion; the thin strip structure of the dustproof cushion consists of a longitudinal incision formed at the centre line of the dustproof cushion along the direction of the chute, and a plurality of equally spaced transverse incisions, which are arranged on both sides of the longitudinal incision and vertical to the longitudinal incision; and the transverse incisions form a plurality of structures which are compactly contacted with one another and separable from one another. When the slide button of the dustproof cushion designed in the slide rheostat slides, the thin strip structure at the position where the slide button reaches is turned up to make the slide button pass through, while other parts are closed, so dusts can be effectively prevented from falling into the slide rheostat through the chute and further making the slide button be out of order; meanwhile, static electricity can be prevented from passing through the chute and directly contacting the printed circuit board to damage circuits or electronic devices on the printed circuit board.

Description

technical field [0001] The invention relates to a sliding rheostat, in particular to a sliding rheostat with a dust-proof structure. Background technique [0002] Sliding rheostat is one of the commonly used devices in electricity. It is widely used in household appliances such as vacuum cleaners and air conditioners, as well as communication tools, automobiles, instrumentation and other fields. A sliding rheostat is an electrical component that can be adjusted to obtain different resistances. By changing the resistance of the connected circuit part, the current in the circuit is changed, thereby changing the voltage across the conductor (electrical appliance) connected in series. It can be used as a current limiter or a voltage divider in the circuit to protect the circuit. [0003] figure 1 It is a structural diagram of the position of the sliding rheostat applied in the vacuum cleaner. The sliding rheostat 1 shown in the figure is installed in the top cover 11 of the va...

AI Technical Summary

Problems solved by technology

[0007] Due to the existence of the slideway 5 in the sliding rheostat 1 of the prior art, dust will fall into the sliding rheostat 1 through the slideway 5, causing the sliding button 4 to fail, that is, the resistance of the access circuit cannot be changed by sliding the sliding button 4 size, even with infinite resistance

At the same time, due to the existence of the slideway 5, static electricity is also easy to enter the sliding rheostat 1, directly contact with the printed circuit board 2, and damage the circuit or electronic devices on the printed circuit board 2.

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