Multi-gear knob contact type switch

Abstract

The invention discloses a multi-gear knob contact type switch which comprises a shell, a gear support sleeved with the shell, a movable contact module installed in the gear support and a gear block used for driving the movable contact module to achieve different gear functions, and the gear block is rotationally arranged between the gear support and the shell in a sleeved mode. The movable contactmodule comprises a PCB, a plurality of movable contact pieces, sliding block assemblies connected with the movable contact pieces in a one-to-one correspondence mode and gear elastic pieces connectedwith the sliding block assemblies in a one-to-one correspondence mode. When the gear block rotates, the gear elastic pieces drive the sliding block assemblies in sequence to drive the corresponding movable contact pieces to slide on the PCB. According to the multi-gear knob contact type switch, small current control can be met, the function is stable, the risk of windscreen wiper function failureis avoided, the fault rate is low, the quality is high, signal acquisition is more stable, and the service life of the switch is longer.

Description

technical field [0001] The invention relates to the technical field of rotary switches, in particular to a multi-position knob contact switch. Background technique [0002] With the increasing demand for automobiles, the demand for wiper switches used in automobiles also increases. The wiper is installed on the front windshield of the car and is used to remove raindrops and dust attached to the front windshield. Equipment, It can improve the visibility of the driver and increase the driving safety. The use of the wiper is controlled by its switch, so the performance of the wiper switch directly determines the use effect of the wiper. [0003] The contact-on micro-switch structure used in traditional wiper switches is a large current when realizing wiper gap, wiper low-speed, and wiper high-speed functions. However, for wiper switches that require small current control, there is a risk of identification during operation. , the wiper function is prone to failure, so it is ne...

AI Technical Summary

Problems solved by technology

[0003] The contact conduction micro switch structure used in the traditional wiper switch is a large current when realizing the wiper gap, wiper low speed, and wiper high speed functions, but for the wiper switch that requires small current control, there is a risk of identification during operation , it is prone to failure of the wiper function, so it is necessary to develop a wiper switch structure that can meet the small current control and stable function

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