A Knob Structure of Automotive Interior Parts with Crushing Function

Abstract

The invention relates to a knob structure of an automobile interior decoration with a crush function. It includes a PCB board, a hollow encoder, a knob, a key bracket, a key cap and a decorative ring, wherein the knob is set outside the hollow rotating shaft of the hollow encoder, and three elastic arms are designed on the lower part of the knob to make it fit in the middle Match the three guide grooves on the control encoder. The end surface of the elastic arm of the knob pushes against the limiting surface at the bottom of the middle guide groove, and plays an axial limiting role on the knob. In addition, the inner side of the bottom of the elastic arm of the knob is chamfered, so that when the knob is subjected to a certain limit of axial force, the three elastic arms are easy to stretch outwards to realize the collapse of the knob. When the axial force on the knob exceeds a certain limit, the three elastic arms of the knob will expand outward, and the entire knob will slide down along the guide groove of the hollow encoder / potentiometer to realize the collapse of the knob, which can meet the collapse amount of about 3mm and achieve protection. occupant safety purposes.

Description

technical field [0001] The invention relates to the technical field of vehicle interior decoration equipment, in particular to a knob structure of an automobile interior decoration with a crush function. Background technique [0002] At present, almost all domestic automakers have GB11552 or ECE-R21 requirements for the protrusions of automotive interior knobs. In the case that the height of the interior knob protrusion exceeds 9.5mm, and the excess part does not exceed 2mm (that is, the height of the knob is 11.5mm, and the height of the knob is the most commonly used and most convenient height for the knob of the automotive interior electrical device, the application is very Generally.), in order to meet the requirements of GB11552 or ECE-R21, the common practice in the industry is to adopt the scheme that the knob can collapse and fall off under the force of 378N: directly use the potentiometer or encoder finished parts for the knob, and the hollow knob below For the PCB...

AI Technical Summary

Problems solved by technology

At present, this kind of collapse and fall-off scheme has two main disadvantages: 1. Due to the influence of PCB material and manufacturing process, the collapse force varies greatly, and it is difficult to meet the strict requirements of some customers for the range of collapse force; 2. This Knob crumpling and falling off scheme, when the vehicle is collided, the knob will crumble and fall off when the product is subjected to a force of 378N; in addition, under non-collision conditions, the knob may also crumble and fall off due to misoperation by the occupant

As long as the knob collapses and falls off, some or all of the functions of the knob will fail, and the car needs to be repaired to replace the part, which will cause great losses to consumers and a great waste of resources.

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