The seat backrest can also store electricity

Does a seat backrest reduce fatigue?

Such a seat backrest design can support the human body in a balanced way, so it will relieve fatigue more than ordinary seats. It is worth exploring whether providing effective support to the head, chest back and waist back of the seated human body in a vibrating environment can provide good vibration reduction effect.

Does a backrest reduce vibration in a seated human body?

The main postures studied in human biodynamics are the standing posture 7 and the sitting posture 8. In this paper, we study the effect of the backrest on the vibration reduction of a seated human body using the upper torso model.

What is the difference between seat pan and backrest?

Seat Pan: The seat pan is the part of the chair on which you sit. It can move independently of the backrest in some chairs, allowing for more versatile tilting. b. Backrest: The backrest is the vertical part of the chair that supports your back. It is essential for maintaining proper spinal alignment and reducing strain.

Why are some seats protruding?

Some seats are covered with cotton padding, but the backrests are significantly protruding, which is not conducive to the chest back and waist back resting against the backrest at the same time. A few premium seats have a backrest design that hugs the curve of the spine, but the headrest protrudes too far forward for the occupant’s usual comfort.

Do seat backrests have a lateral component force?

Seat backrests usually have a small inclination angle and normal support to the human body, as shown in Fig. 2 a. In this paper, we study the vibration response in the vertical direction, so we neglect its lateral component force. According to the four support points in Fig. 1, the full contact backrest is modelled as shown in Fig. 2 b.

Does the backrest affect the vibration reduction effect?

Using the human–chair coupling model to study the vibration reduction effect of the seated human body in contact with the backrest, and the stiffness and damping of the backrest on the vibration reduction effect of the influence is the focus of this paper.