Abstract: An improved telephone set of the type including a telephone body and a handset adapted to be placed on the former wherein the telephone set includes features which prevents displacement of the handset from the telephone body. The telephone body has a pair of engagement blocks incorporated therein of which part is projected outwardly of the telephone body and they are fitted into engagement recesses on the handset whereby the latter is firmly placed on the telephone body. At least the one engagement block has an engagement face which is adapted to come in contact with the engagement portion in the corresponding engagement recess, wherein each engagement block includes a pawl portion. Displacement of the handset occurs by displacing one of the pawl portions out of its respective engagement recess followed by displacement of the handset in a second direction which is different from the first direction which causes the displacement of the other pawl portion out of its respective engagement recess.

Abstract: An improved telephone set of the type including a telephone body and a handset adapted to be placed on the former. The telephone body has a pair of engagement blocks incorporated therein of which part is projected outwardly of the telephone body and they are fitted into engagement recesses on the handset whereby the latter is firmly placed on the telephone body. At least the one engagement block has an engagement face which is adapted to come in contact with the engagement portion in the corresponding engagement recess. Thus, the handset is reliably held on the telephone body.

Abstract: An improved system for fixedly mounting a case or the like box-shaped article onto the body of a motorcar is disclosed. The case is first placed on a mounting base fixedly secured to the body of motorcar by fitting a plurality of projections into holes on the mounting base and thereafter by operating a displacing device with the aid of a key the case is displaced relative to the mounting base so that the former is fixedly mounted on the latter. Each of the projections is formed with a V-shaped annular groove and each of the holes includes a larger diameter portion of which diameter is dimensioned larger than that of the projections and a smaller diameter portion formed by cutting a part of the larger diameter portion with a circle having the diameter dimensioned smaller than that of the larger diameter portion.