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Hello, I am the president of the Electric Vehicle Commune.

Today, let's talk about a topic that has nothing to do with new energy and intelligence, but is related to everyone who is going to buy a car.

what is the most important factor you consider when choosing a car?

Some people say motivation, some people want space, some keyboard drivers want manual gear, and some players with little knowledge want three pieces.

Some people are different, so they should suit their ergonomic performance. Before, the president wrote an article on popular science ergonomics, "This technology can be seen everywhere! But in the car, it has fallen behind for decades. ",many netizens left messages:

Today, I directly found a big man who provides ergonomic consulting services for various manufacturing enterprises, and asked him to talk to you more deeply about the car parts system closely related to your ass and waist-seat on the basis of our popular ergonomics.

(The following is the original text of a friend who is doing ergonomics consulting service)

Is the seat soft or hard?

isn't it necessarily bad that the length of the rear seat cushion, which has been dismissed as a means of stealing space, is short

?

There are all kinds of wings that are tilted

The wrapping property must be good, and the sports performance must be OK?

These frequently asked questions

This article will give you the answers

The seat seems to be a very simple part, which mainly consists of four parts: skeleton, suspension spring, foam and fabric, plus other accessories such as motors and regulators.

However, the seat is extremely important. It is a key component system connecting the car and people. Except for being absorbed by the suspension, all kinds of road responses are completely accepted and transmitted by the seat.

the quality of seat design directly affects the comfort of the car.

As Boss Shufu Li, a head-owned car company, famously said many years ago, "A car is just four wheels and a sofa", which proves the importance of seats.

The seat really looks like a sofa composed of a cushion and a backrest, but the research and development of seat comfort is a huge and complete system.

The dimensions of traditional seat comfort include five aspects: static comfort, dynamic comfort, adjustment comfort, functional comfort and operation comfort. In recent years, many enterprises have taken out the odor from the original static comfort and established a single large dimension of odor comfort.

when we went to the 4S shop to see the car, we mainly investigated the softness and hardness, wrapping, materials and fabrics of the seat, which involved static comfort and dynamic comfort.

a mistake that almost everyone makes is to judge the two dimensions of dynamic comfort, i.e. hardness and geometric size, depending on the simple riding experience of the exhibition hall.

Coupled with the old concept of "soft = comfortable sofa, hard = uncomfortable bench", the models with soft seats have more audiences and a better market. The " gravity seat" advertised by a certain brand of Yiyi has brought this selling point to the extreme.

but what is the cruel truth?

Soft seats have worse dynamic comfort and are more likely to make passengers tired.

for example, AION of GAC? S。

AION positioned in the middle and high-end market of new energy? S has made great efforts in interior materials, and a lot of fur has been used in the seat, which greatly enhances the sense of grade. The seat adopts the integrated shape of racing car, which highlights the sense of movement on the "vision".

（aion? S seat)

However, the foam material with softer hardness is chosen as the seat filling material, which leads to poor overall support.

a product with a sense of positioning technology and comfort, which is matched with the seat shape with strong sports elements, is made of soft foam material, which is a very disobedient thing in itself. Can only say AION? S also took great pains to cater to the taste of the market.

I drive Aion alone? S's good friend said that he was satisfied with the car except the seat. And the other one drives Aion? S's good friend said that he usually rolls up his clothes as cushions. . .

recently, you have seen more and more AION on the road? S is used as a private car. If possible, please pay more attention to these drivers' waists ...

The reason for this counterintuitive conclusion is that compared with the completely static state of the sofa at home, the seat of the car is always in motion, and the space inside the car has no conditions for people to change their postures frequently and walk back and forth to relieve fatigue;

Therefore, the hard seat can give passengers enough wrapping, so that the passengers' bodies will not shake too much in the bumps of the vehicle, resulting in unnecessary adjustment, and at the same time, the waist load of the passengers can be effectively unloaded, thus reducing the fatigue.

maybe someone can handle it, but a big soft sofa doesn't smell good?

not fragrant.

The automobile is the product of ergonomics. Take a rational look at the office chair. As a product that needs to be used for a long time, the ergonomic office chair never puts softness into the product design elements. The reasonable distribution of body pressure in various parts of the body and the application of high-tech materials all emphasize "support" and "rebound".

If you still have doubts about this point, you can choose Sylphy and Fox to drive for more than 4 hours respectively. I believe you will agree with my conclusion.

What I said above is not to completely deny the soft seats.

if your car is only used for commuting and there is little need for long-distance travel, then you can choose a soft seat. A soft seat relaxes your body and mind for a certain period of time.

If you often have to run long distances or spend more than ten hours in the car every day, you'd better choose a hard seat.

an inappropriate but positive example, such as the Jaguar E-pace, which is being sold at a 5% discount, shows that the seats and product images are very unified.

The sporty interior and exterior decoration and seat modeling, as well as the hard and hard seat filling material, together with the huge and adjustable backrest wing (wrong wing), ensure the comfort of long-term driving.

However, it may be because the battery encroaches on the height under the car, and at the same time, it is necessary to ensure the occupant's low sitting posture. If the road conditions are bad, the ass will feel uncomfortable ...

(Jaguar E-pace)

Next, let's talk about wrapping.

The design parameters of cladding include: geometric size and profile surface.

Coverage is determined by the geometric size of the seat profile, which is generally divided into two parts: the seat cushion and the backrest. It is evaluated from the cross section and the longitudinal section whether the angle, length, departure point and bite point can meet the requirements of 5%-95% human body size.

when the coverage is insufficient, the seat can't give enough support to the human body in all directions. The vehicle will transmit forces to the driver in all directions under different road conditions, and the driver needs to spend extra forces to counter the external forces given to the body by the vehicle in order to return to the original normal driving posture.

therefore, soft filling and insufficient wrapping will easily cause fatigue for a long time. After a longer period of use, diseases such as lumbar muscle strain will also come to you.

excessive coating is also undesirable, which will cause unnecessary stress to the driver's body. For example, if the inclination angle of the cushion is too large, it will cause oppression on the thigh vein of people; If the cushion is too long, it will reach the calf.

Another example is the newly listed UNI-T in Chang 'an, which is complained by many people. The shoulder wing is too narrow, which makes it uncomfortable for tall drivers to drive with their shoulders tucked. Therefore, high-end brands such as BBA have been equipped with adjustable or even inflatable wings to solve similar problems.

(Chang 'an UNI-T)

Back to the second question at the beginning, is the cushion with a shorter back row a trick used by Jizei Car Factory to steal space?

the answer is no.

In the life scene, most of the passengers in the back row are women and children with slightly smaller body size, and blindly lengthening the size of the seat cushion is not friendly to such passengers. Therefore, when the ergonomics engineer gives the corresponding size, the size of the seat cushion in the back row will be slightly reduced. Leg space looks big, just an incidental feature.

finally, let's summarize the main points of this article.

softness does not mean comfort; It's better to be hard

the length of the seat cushion is short, depending on who sits more.

wing protection is very wrapped, so it depends on your figure.

otherwise, do you think the car factory developed the 16-way seat adjustment to show off its skills?

most importantly, don't follow suit when buying a car. Choose what suits you best.

This article comes from the author of Chejia, car home, and does not represent car home's standpoint.