Light receiving and dispatching module

The invention discloses a light receiving and dispatching module, which comprises a shell, a latch element and a torsion spring, wherein the shell is provided with a fixing column and a stop dog; thelatch element is provided with a clamping lug; the torsion spring comprises a winding part, a first extension part and a second extension part; the first extension part and the second extension part are connected with the winding part; the first extension part is provided with a first free end; the second extension part is provided with a second free end; the first extension part and the second extension part have a cross point on a projection surface; the torsion spring clockwise defines a first area, a second area, a third area and a fourth area by taking the cross point as the center; and the winding part surrounds the fixing column in the first area; and the first free end is suitable for connecting with the latch element. 一种光收发模块，包括外壳、闩件以及扭力弹簧。外壳具有固定柱以及挡块。闩件具有卡合凸块。扭力弹簧包括卷绕部、第一延伸部以及第二延伸部。该第一延伸部以及该第二延伸部连接该卷绕部，该