Analysis of Five Design Attributes and Four Common Structures of Pen and Electric Spindle

The penholder is a typical moving part, which has to bear both bending moment and torque, which has a decisive impact on the switching experience. Then, let's learn about the five design attributes and four common structural analysis of the pen and electric shaft!

1 Hinge Design Properties

1. damping effect

When an object is vibrated by an external force, a reaction force that attenuates the external force is generated. The ratio to the force is called the damping coefficient. In general, the direction of the damping force is always opposite to the direction of the speed of movement. Therefore, the greater the damping coefficient of the material, the better the damping effect or damping effect. But the damping is not the greater the better. When the damping increases to a certain extent, a rigid connection is formed between the two objects. Damping is generally used together with springs, and the damping is too large to obtain the effect of buffering.

The role of shaft attenuation mainly has the following four aspects:

1) It helps to reduce the resonance amplitude of the mechanical structure;

2) After the mechanical system is subjected to instantaneous impact, it helps to restore the stable state immediately;

3) Help to reduce mechanical vibration acoustic emission and reduce mechanical noise;

4) It helps to reduce the vibration transmission capacity of the structure.

2. Opening and closing angle

Refers to the angle of rotation of the laptop screen after it is turned off. There are two types of common designs. One is the traditional hinge design, which usually does not have a flip capability of more than 180 degrees. The other is 360-degree flip, which can well adapt to the advantages of the use environment, and is very useful for users who frequently change the use scene. In other words, the larger the angle at which the notebook's rotation axis is turned to open and close, the wider the applicable scene.

3. Limit angle

There are two ways to limit the rotation angle of the rotating shaft, that is, the way to set the limit on the rotating shaft and the way to set the limit on the notebook computer shell. See which way is simpler. It can generally be referred to as a limited-angle rotating shaft with damping. There are many such rotating shafts. Our common rotating shafts with limit angles are 135 degrees, 145 degrees, 180 degrees, 270 degrees, etc.

II. Common laptop hinge structure

1. Protruded shaft

By fixing the projection-type rotary shaft to the main body, the screens can be brought into closer contact. The advantage is that the whole picture will rise when opened. In this way, the screen will not block the back of the laptop, and various ports, heat dissipation holes, etc. can be easily set on the back of the laptop. It is very advantageous from the point of view of making full use of notebook computer space and increasing the number of ports. In addition, since the projection type rotary shaft is not easily shielded during rotation, the opening angle of the screen is large, usually 150 ° to 180 °. However, the thickness of the screen must be the same as that of the fixed portion, and there is a disadvantage that it cannot be too thin.

2. sinking shaft

The fixed point of the sunken shaft is located in the thicker body part, regardless of the thickness of the piece. Laptops have entered the bottleneck era. In order to make laptops thinner, hinge manufacturers have developed sunken hinges, and the screen is no longer limited by the thickness of the body. The disadvantage is that due to the increase in the difficulty of design and production technology, the screen is far away from the line of sight, between the two sides, the opening and closing angle of a slit is not enough, and the number of notebook computer interfaces is also reduced, but it does not affect the user's yearning for mobile phones.

Generally speaking, the protruding type rotating shaft and the sinking type rotating shaft have no advantages and disadvantages, and the design should be determined according to the specific model. In general, large-screen notebooks, business notebooks, and full-function notebooks typically employ raised hinges for scalability and ease of use. Netbooks and thin laptops usually use sunken hinges and multi-axis hinges to reduce the thickness of the laptop top cover, so hinged hinges are rarely used.

The above introduction is the five design attributes of the pen and electric shaft and the analysis of four common structures. If you need to know more, please feel free to contact us!