To provide a seismoscope structure for providing a combustor capable of being used in safety to heating demand in temporary facilities such as a tent.

A seismic weight 2 loaded on a base 1 is composed of a weight main body 2a provided with an operational shaft 3 on its lower face, and a cylindrical supporting cylinder 2b having an outer diameter same as the weight main body 2a extended downward from a lower portion of the weight main body 2a. A recessed portion 2c is formed on a lower portion of the seismic weight 2 so that a lower face of the weight main body 2a is not kept into contact with the base 1, and the operational shaft 3 is extended downward from the lower face of the weight main body 2a, penetrated through a small hole 1a of the base 1 and engaged with a fire extinguishing device starting member 5. As the seismic weight 2 is loaded on the base 1 by a lower end of the supporting cylinder 2b, and constituted to fall at the lower end of the supporting cylinder 2b as a supporting point, the combustor can be used stably to the inclination of the combustor without making the seismic weight 2 fall, on the other hand, the seismic weight 2 easily falls under vibration such as earthquake and falling of the combustor, so that an automatic fire extinguishing device 6 is operated to extinguish the fire of the combustor.