Thermal actuator

Abstract

The present invention provides a thermal actuator in which the travel distance of the moving body is large relative to the size of the soluble material. [Solution] The thermal actuator comprises a moving body, a main body, a lid, a fusible body, a piston, a force transmission body, and a restraining part. The piston has a piston bottom plate that contacts the fusible body. The force transmission body is provided between the piston and the tip of the moving body in the first direction. The moving body has a moving body contact surface that contacts the inner surface of the force transmission body and whose normal is inclined outward with respect to the first direction. When the fusible body melts, the piston moves in the first direction, the force transmission body moves away from the restraining part, and moves outward.

Claims

1. A moving body biased in a first direction by an external force, A main body having a through-hole in which the movable body is arranged, A lid is connected to the main body in the first direction, forming an operating space that communicates with the through-hole of the main body between the main body and the lid, A fusible body provided on the wall surface in the first direction of the working space, A piston having a piston bottom plate that contacts the fusible material, A force transmission body provided between the piston and the first tip of the moving body, A restraining portion that contacts the outer surface of the force transmission body, Equipped with, The moving body has a moving body contact surface that abuts against the inner surface of the force transmission body and whose normal is inclined outward with respect to the first direction. The force transmission body transmits the external force transmitted from the moving body to the piston. When the fusible material melts, the piston moves in the first direction due to the external force transmitted from the force transmission body. When the soluble material melts, the force transmission body separates from the restraining portion and moves outward. Thermal actuator.

2. The receiving member further comprises a first contact surface that contacts the surface of the force transmission body in the first direction, and a second contact surface that contacts the lid, The suppression portion protrudes from the piston bottom plate in a second direction, which represents the opposite direction to the first direction. The suppressing portion has a piston contact surface at the inner end of the surface of the suppressing portion in the second direction, the normal of which is inclined inward. The piston contact surface contacts the outer surface of the force transmission body, The receiving member has a first through-hole through which the restraining portion is inserted. The thermal actuator according to claim 1.

3. The thermal actuator according to claim 2, wherein the receiving member has a second through-hole in the center when viewed from the first direction through which the moving body is inserted.

4. The thermal actuator according to claim 2 or 3, wherein the receiving member has a guide groove at a position including the first through hole when viewed from the first direction.

5. The suppression unit is Provided on the first direction surface of the main body, The normal is inclined inward with respect to the first direction and has a restraining contact surface that contacts the force transmission body. The thermal actuator according to claim 1.

6. The piston has a piston through hole that penetrates in the first direction. A thermal actuator according to any one of claims 1 to 5.

7. The piston through-hole is located in the center of the piston when viewed from the first direction. The thermal actuator according to claim 6.

8. The device further includes a guide portion extending in a second direction representing the opposite direction to the first direction, The moving body has an insertion opening formed in a concave shape at the tip in the first direction through which the guide portion is inserted. A thermal actuator according to any one of claims 1 to 7.

9. The guide portion is provided on the piston. The thermal actuator according to claim 8.

10. The guide portion is provided on the lid. The thermal actuator according to claim 8.

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