A housing assembly, comprising: a housing , wherein at least one hollowed-out portion is disposed on the housing , and the hollowed-out portion penetrates through the housing ; at least one fastening structure , wherein the fastening structure is fastened to the housing ; and a notched portion is disposed on the fastening structure ; and a support structure , wherein at least one support hole is disposed on the support structure , and the support hole penetrates through the support structure , wherein at least a part of the fastening structure passes through the support hole , and a portion of the support structure close to the support hole is fastened to the notched portion ; the fastening structure comprises a protrusion portion and a first part and a second part that are located on one side of the protrusion portion that is away from the housing ; one end of the first part is connected to the protrusion portion , and the other end of the first part is connected to the second part ; an extension direction of the second part is the same as an extension direction of the protrusion portion , and both are parallel to a plane in which the housing is located; an extension direction of the first part is different from the extension direction of the second part ; the protrusion portion , the first part , and the second part are combined to form the notched portion ; and a material of the housing comprises a metal material, wherein, along an extension direction of the second part , a distance from a surface on one side of at least a part of the second part that is close to the housing to the housing gradually decreases. a housing , wherein at least one hollowed-out portion is disposed on the housing , and the hollowed-out portion penetrates through the housing ; at least one fastening structure , wherein the fastening structure is fastened to the housing ; and a notched portion is disposed on the fastening structure ; and a support structure , wherein at least one support hole is disposed on the support structure , and the support hole penetrates through the support structure , wherein at least a part of the fastening structure passes through the support hole , and a portion of the support structure close to the support hole is fastened to the notched portion ; the fastening structure comprises a protrusion portion and a first part and a second part that are located on one side of the protrusion portion that is away from the housing ; one end of the first part is connected to the protrusion portion , and the other end of the first part is connected to the second part ; an extension direction of the second part is the same as an extension direction of the protrusion portion , and both are parallel to a plane in which the housing is located; an extension direction of the first part is different from the extension direction of the second part ; the protrusion portion , the first part , and the second part are combined to form the notched portion ; and a material of the housing comprises a metal material, wherein, along an extension direction of the second part , a distance from a surface on one side of at least a part of the second part that is close to the housing to the housing gradually decreases. <EOS>