Strain sensor fixing device and torque sensor using the same

A torque sensor comprising:

• a first structure;
• a second structure;
• a plurality of third structures connecting the first structure and the second structure to each other;
• a strain body provided between the first structure and the second structure;
• a first fixing device provided on the first structure and configured to fix a first end of the strain body to the first structure;
• and
• a second fixing device provided on the second structure and configured to fix a second end of the strain body to the second structure, wherein
• each of the first fixing device and the second fixing device includes
• a fixing member including a third end and a fourth end, the fourth end coming into contact with the first end of the strain body provided on the first structure or the second end of the strain body provided on the second structure,
• a projection provided at one of the third end of the fixing member and a part of the first structure corresponding to the third end, or a projection provided at one of the third end of the fixing member and a part of the second structure corresponding to the third end, and
• a screw to be inserted into the first structure or the second structure and screwed into a part of the fixing member between the third end and the fourth end of the fixing member.