With the continuous improvement of automobile manufacturing, many friends are increasingly considering the comfort of the car when buying a car. The comfort components of car seats are an important part of providing a comfortable experience for the human body and meeting the comfort needs of the human body in the car seat, which are mostly achieved through pneumatic structure, mechanical mechanism, physical and chemical properties, etc. The comfort components of a car seat are generally composed of a lumbar support, a cushion suspension spring, a massage, a leg rest, a backrest foam, a cushion foam, a headrest, an armrest and some adjustment mechanisms that improve the comfort experience of the human body.
Seat comfort parts, based on the seat frame, connect or install various comfort parts on the frame to meet the human body posture adjustment (such as: legs, hips, waist, shoulders, elbows, head, etc.) and the human body's experience of comfort.
And the lumbar support and massage assembly are the key to it.
1. Lumbar support. During a long period of car driving, the human body's lower back muscles will be fatigued due to long-term tension, and then produce discomfort such as soreness. The lumbar support can be adjusted to promote blood circulation in the waist area of the human body, thereby relieving discomfort such as fatigue.
Lumbar support is divided into mechanical lumbar support and pneumatic lumbar support.
Massage. During a long drive in a car, the muscles of the human waist and back will be fatigued due to long-term tension, and then soreness and other uncomfortable feelings. Massage can regulate and promote blood circulation in the body's lower back and back area, thereby relieving discomfort such as fatigue.
With the popularization and promotion of electric vehicles, the requirements for these components, especially electrical accessories, are getting higher and higher. The traditional oil truck engine is more noisy, which will cover up the noise of some parts themselves, and the electric vehicle does not have the noise of the engine itself, which is quieter, so it puts forward higher requirements for the noise of these accessories, and the test of these accessories puts forward higher requirements for the test environment, and the traditional production scene can not meet the increasingly value-added quality requirements, and the application of soundproof boxes can perfectly solve the demand for low noise in this environment.
Saisheng Technology - a professional provider of RF and audio test environment equipment (shielding box, soundproof box), providing you with a non-interference RF test environment and a low noise floor and low noise test environment for your RF and audio testing, providing a test environment with 80dba of external white noise and less than 30dba inside, improving test efficiency and accuracy, and escorting product quality
Soundproof box: generally made of high-density metal and professional sound-absorbing materials to reduce the impact of external noise on the equipment in the cavity;It can also block the noise of the sound generating equipment in the cavity from propagating to the outside world.
There are two main parts of sound insulation technology: sound insulation and sound absorption.
Sound insulation performance calculation:
In the working frequency band of the soundproofing box, the frequency point is set according to one-third of the octave, and the data when the soundproof speaker is opened and closed are tested respectively, and recorded, respectively a and b.
Volume isolation tl=b-a (dba).
Technical basis for sound insulation test (reference documents for the calibration):
GB 6882-1986 Determination on sound power levels of noise sources-precision methods for anechoic and semi-anechoic rooms