Disclosed is an adapter, which includes a housing, a bushing and a sleeve, wherein the housing is provided with a plurality of receiving cavities for receiving the bushings, the bushing includes a support part and a hollow column on the support part, the bushing is mounted in the receiving cavity, a part of the sleeve is mounted within the hollow column of the bushing and another part is mounted within the receiving cavity. In the adapter of the present disclosure, a plurality of bushings/core clips can be mounted in one housing/outer frame, the adapter is integrated with multiple bushings, adapting multiple jumpers, which can effectively improve space utilization and reduce the cost of use; and no welding is required, which can effectively reduce the rejection rate in the production process and improve production efficiency, meanwhile, reduce the assembly processes and labor cost.