A knob switch for vehicle

Abstract

The invention relates to a knob switch for a vehicle, include a housing and a knob, A PCB with a light emitter and a knob light transmission device are arranged in the housing, A light guide structureis arrange in that housing corresponding to the position of the light emit body, the light guide structure comprises a first light guide ring and a second light guide ring positioned below the firstlight guide ring, the bottom of the second diaphragm is provided with a plurality of diffusion portions along the circumferential direction of the bottom of the second diaphragm so as to diffuse the light emitted by the light emitter onto the second diaphragm, The upper surface of the second diaphragm is also provided with a saw tooth capable of uniformly scattering light to the lower bottom surface of the first diaphragm, and the first diaphragm is provided with a refractive part capable of refracting the upward transmitted light to the outer peripheral surface of a knob mounted on the firstdiaphragm. By adopting the technical proposal, the invention provides a vehicle knob switch which not only meets the requirement of uniformity, but also has high light source utilization ratio.

Description

technical field [0001] The invention relates to the field of automobile switches, in particular to a rotary switch for automobiles. Background technique [0002] With the development of automotive electronics, more and more electronic devices are used in automobiles, and customers have higher and higher requirements for their structural technology. As a knob switch for adjusting automotive air conditioners, audio and other equipment, it is impossible. The missing part, in order to ensure that the user can normally use the rotary switch at night or in the case of insufficient light, a rotary switch with a luminous knob itself has appeared, including a base and a shell installed on the base. The housing is provided with a knob, and the base is provided with a PCB with a luminous body, and the knob is light-transmitting, thereby ensuring that the customer can recognize the position and size of the knob in the case of insufficient light, and is convenient for operation. Althoug...

AI Technical Summary

Problems solved by technology

Although this kind of knob switch generally arranges a plurality of luminous bodies on the circumference of the PCB according to the luminous angle of the luminous body in order to ensure the brightness and uniformity of the knob, it still cannot avoid the dark brightness of the knob part far away from the luminous body. , so that the light intensity of the knob part closer to the illuminant is different, the brightness is uneven, and the quality of the knob is not high. Even if a lot of time is spent on dimming in the development and design, the consistency during mass production cannot be guaranteed; Concentrating structure, low utilization rate of light source, in the case of too many illuminants, the light diverges everywhere, increasing the risk of light leakage of the knob switch

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