A inside atmospheric pressure regulator of banks for rail train

The utility model provides an inside atmospheric pressure regulator of banks for rail train, includes rubber capsule and tighrening ring, rubber capsule type of being dish sets up a plurality of equally spaced through -holes on the circumference, the tighrening ring is ring shape, and corresponding through -hole on setting and the rubber capsule circumference is fixed the rubber capsule on lamp body rear side panel through the screw on it. Adopt the special design of rubber capsule, make the inside air pressure of sealed lamp body change along with ambient temperature's change to guarantee that the inside air pressure of lamp body equals with atmosphere pressure often, and then equipment can not receive the damage because internal pressure changes in guaranteeing the lamp body. 种用于轨道列车的灯组内部气压调节装置，包括橡胶胶囊和紧固环，所述橡胶胶囊呈类碟形，圆周上设置若干等距的通孔；所述紧固环呈圆环形，其上设置与橡胶胶囊圆周上相对应的通孔，通过螺钉将橡胶胶囊固定在灯体后侧面板上。采用橡胶胶囊的特殊设计，使密封的灯体内部空气压强会随着环境温度的变化而变化，从而保证灯体内部空气压强与大气压强时时相等，进而保证灯体内设备不会因为内部压强变化而受到损坏。