Patent ID: 8191877
Filing Date: 2012-06-05
Classification: F16F,F21V

Abstract:
1. A torsion spring adapted for fixing a shell having an assembling portion onto a fixing end, the torsion spring comprising: a spring body having a first end portion and a second end portion opposite to the first end portion and assembled to the assembling portion; a first supporting part, comprising: a first arm extending from the first end portion of the spring body; a first bending part extending from an end of the first arm that is away from the spring body; a second arm extending from an end of the first bending part, which is away from the first arm, to the second end portion of the spring body; a second supporting part, comprising: a third arm extending from the second end portion of the spring body; a second bending part extending from an end of the third arm that is away from the spring body; and a fourth arm extending from an end of the second bending part, which is away from the third arm, to the first end portion of the spring body, wherein the first arm and the second arm tightly clamp the assembling portion by the force of the spring body, and the third arm and the fourth arm tightly clamp the fixing end by the force of the spring body when the fixing end and the assembling portion of the shell are positioned between the first supporting part and the second supporting part, wherein the third arm, the second bending part and the fourth arm are located at one side of the assembling portion, and the first arm, the first bending part and the second arm are located at another side of the assembling portion.