| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique that can prevent a bearing from rattling.SOLUTION: A thermo-actuator 40 comprises a cylindrical case 50, a temperature sensing part 60 that is attached to one end of the case 50, a piston 43 that is housed in the case 50 and moved forward by expansion of wax 64, a rod 70 that is moved forward by forward movement of the piston 43, a return spring 46 that is housed in the case 50 and biases the rod 70 in a backward direction, a bearing 80 that extends along an outer peripheral surface of the rod 70 from another end of the case 50 toward the one end, and a guide member 48 that extends along an outer periphery of the bearing 80 and restricts a circumferential displacement of the return spring 46. Resin is used as a raw material of the bearing 80, and metal is used as a raw material of the case 50. An O-ring 49 is arranged between the bearing 80 and the guide member 48. |
