1. Background knowledge of ergonomics

Ergonomics is a discipline that studies the relationship between people, machines and the environment, aiming to optimize the coordination between people and technology and create a better human experience. It involves multiple aspects such as human physiology, psychology, and cognition. Through systematic analysis, the best design scheme for human-machine interface and interaction process is proposed. In product design, the application of ergonomics can improve the usability and comfort of products and reduce the risk of fatigue and injury during use.

2. Ergonomic considerations in door handle design

• Size and shape: The size and shape of door handles should match the natural curves of human palms and fingers to provide a comfortable grip. For example, the length of the door handle should be 100-125mm and the diameter should be 30-40mm to accommodate the hand shape of most people. In terms of shape, spherical, rod-shaped and semicircular door handles have their own advantages and are suitable for different usage scenarios.

• Operation force: The opening and closing force of the door handle should be moderate, neither too light to lack stability, nor too heavy to affect the user experience. Reasonable opening and closing force can reduce fatigue caused by long-term use and give people a convenient and comfortable use experience.

• Material and touch: The door handle should be made of durable, smooth, and soft materials, such as high-quality metal or soft wood, to give people a warm and delicate touch and increase the pleasure of use. At the same time, the surface of the door handle needs to be anti-slip to ensure that people can still hold the door handle firmly in the case of moisture or sweaty hands to avoid accidents.

• Installation position: The installation height of the door handle should be set according to the average height of the person. It is generally recommended to be 80-100cm from the ground to ensure the comfort of most people. This can avoid people with shorter height from tiptoeing or people with taller height from bending too much.

3. Common problems and optimization suggestions for door handle design

• Improper size: If the size of the door handle is too large or too small, it cannot match the human hand naturally, which will bring inconvenience and burden to the use. The optimization suggestion is to reasonably determine the size of the door handle according to the principles of ergonomics to adapt it to the hand shape of different people.

• Material problem: The selected material is not durable or has safety hazards, such as rough metal surface and easy aging and cracking of plastic. The optimization suggestion is to select high-quality materials and perform fine surface treatment to ensure the durability and safety of the door handle.

• Opening and closing are blocked: The opening and closing action of the door handle is not smooth, requiring greater operating force, which affects the user experience and safety. The optimization suggestion is to optimize the mechanical structure of the door handle to ensure smooth and stable opening and closing.

• Visual incoordination: The appearance design of the door handle is not coordinated with environmental elements such as the door body and wall, affecting the overall appearance. The optimization suggestion is to pay attention to the coordination between the door handle and the overall environment during design to enhance the visual beauty.

The design of the door handle is closely related to ergonomics. A reasonable door handle design can significantly improve the comfort and convenience of the user, while reducing fatigue and risks during use. By fully considering the principles of ergonomics and combining the actual use needs for design, users can be provided with a better, safer and more efficient use experience. In the future, with the continuous advancement of technology, intelligent and humanized door handle design will become mainstream, further enhancing the user experience.