Shell

Abstract

The invention relates to a torsion spring and a shell using the torsion spring. The shell includes a cover and a body, and the torsion spring is used to open the cover. The torsion spring includes a spring, a first spring arm, and a second spring arm. The first spring arm and the second spring arm extend from two ends of the spring. The spring is fixed on a rotary shaft on the cover. The first spring arm is against the cover, and the second spring fixed on the body. The first spring arm includes a first section, a second section, and a third section in turn. The first section extends from thespring linearly, and the second section is connected with the first section and the second section. The third section can generate an elastic distortion relative to the first section and external acting force. The acting force hinders the opening of the cover.

Description

technical field [0001] The invention relates to a casing. Background technique [0002] Torsion spring is a common mechanical basic element, which is made of metal wire wound in a helical manner, which can store potential energy or release potential energy to generate torsion under the action of torsion. Torsion springs are widely used in various fields such as automobiles, communication equipment, telecommunications equipment, and drive equipment. [0003] Parameters commonly used to define torsion springs include torsional force or torque. The torsion force refers to the force that makes the spring arm of the torsion spring rotate, and the torsion refers to the magnitude of the torque generated under the action of the torsion force, which is equal to the product of the torsion force and the distance from the torsion force to the torsion spring shaft. [0004] The basic structure of the torsion spring is a cylindrical spring body plus two spring arms, wherein the two spri...

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Problems solved by technology

On the other hand, if the initial torsion force of the selected torsion spring is too small, as the torsion force gradually decreases during the opening process, the cover may not be able to reach and maintain the maximum opening angle, especially after repeated use

Therefore, it is difficult to find the right balance of initial torque between the two

[0007] In addition, due to the instability of the spring production process, the angle tolerance of the manufactured torsion spring is relatively large, which is not conducive to controlling the initial torsion of the torsion spring

[0008] Therefore, there are certain deficiencies in the above-mentioned traditional torsion spring structure, which cannot meet the harsh industrial requirements.

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