LCD screen switch of onboard TV set

Abstract

The invention is LCD screen switch of vehicle TV set, it relates to retroflexion position detecting switch used in vehicle LCD TV set. It possesses a bottom connected with the LCD screen which is fixed to rotary bracket of output axes of motor; motor and insulated rigid fixation bracket are fixed to the TV set; the rotary bracket possesses a conducting boss which is the acting arm of the switch; two conducting boards which are two acting contactors are fixed to surface of movement track to conducting boss; two conducting boards are separately at two sides of the rotary bracket, they match with the conducting boss to limit rotary angle range of rotary bracket, the conducting boss resists one conducting board when the LCD screen is open, the conducting boss resists the another conducting board when the LCD screen is closed. It can resolve problem that the contact is unreliable, and precision of positioning is low of monomer-type switch.

Description

technical field [0001] The invention relates to a flip position detection switch used in a vehicle-mounted liquid crystal television. Background technique [0002] In order to make the interior of the car have a good visual effect and cleanliness, the LCD screen of the vehicle-mounted LCD TV is usually designed to be flipped. The bottom of the liquid crystal screen is fixed on the rotating bracket, and the rotating bracket is fixed on the output shaft of the DC reduction motor formed by the DC motor and the reduction box. When you need to watch TV programs, turn the LCD screen from the TV body (hereinafter referred to as “opening”), and display it roughly vertically in front of passengers; when you don’t need to watch TV programs, turn the LCD screen back to on the main body of the TV (hereafter referred to as “closed”). The turning motion of the LCD screen is powered by the DC geared motor, and the in-position judgment signal for the opening and turning back angle positio...

AI Technical Summary

Problems solved by technology

The in-position switch used as the flip angle positioning generally adopts a commercially available single-type mechanical switch or a power-off switch. This type of switch is easily damaged by impact under the conditions of severe vibration during vehicle driving, and has a high failure rate and low positioning accuracy. Inaccurate

Especially when the in-position switch is not in good contact or the in-position switch does not work properly due to positioning errors, the continuous rotation of the DC geared motor will cause damage to the entire LCD screen

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