Expansion mechanism and control device

The invention provides an expansion mechanism and a control device. The expansion mechanism comprises a base; the first circuit board is used for being detachably connected with an external expansion mechanism, and the first circuit board is installed on the base; the box body is connected with the base in a clamping manner; and the second circuit board is detachably and electrically connected with the first circuit board, and the second circuit board is installed in the box body. According to the expansion mechanism and the control device, the first circuit board detachably connected with the external expansion mechanism is adopted, compared with an existing system, the size of a bottom plate is limited, when the first circuit boards of the multiple expansion mechanisms are electrically connected with one another, the area of the first circuit board can be increased, and therefore expansion of the system is more convenient; the system composition is convenient to adjust. 本申请提供了一种拓展机构及控制装置，拓展机构包括：基座；第一电路板，用于可