Abstract: A connecting device for connecting a sound producing device to an electronic equipment has a connector secured to the sound producing device, and having a pair of elastic contacts and an opening. A slider is provided to be inserted in the connector from the opening, and provided to press the elastic contacts of the connector against terminals of a substrate inserted in the connector from the opening.

Abstract: An electromagnetic sound producing device has a yoke, a coil, a permanent magnet, and a diaphragm provided in a case. The permanent magnet is made of SmFeN-base isotropy plastic magnetic material.

Abstract: A speaker comprises a lower frame assembly and an upper frame assembly. The lower frame assembly comprises a lower frame provided with a yoke, a permanent magnet secured to the yoke, and a top plate secured to the permanent magnet. The upper frame assembly comprises an upper frame provided with a diaphragm secured to the upper frame, and a voice coil secured to the diaphragm and disposed in a magnetic gap between the yoke and the top plate. A plurality of axial grooves are formed in a peripheral wall of the lower frame, and a plurality of engaging portions are formed on the upper frame, corresponding to the grooves of the lower frame. Each of the engaging portions comprises an engaging plate and a hook formed at an end of the engaging plate.

Abstract: An electromagnetic sound generator has a vibrating plate mounted in a case. An armature is secured on the vibrating plate at a central portion thereof. The armature has a concave spherical shape.

Abstract: An electromagnetic sound generator has a vibrating plate mounted in a case. An armature is secured on the vibrating plate at a central portion thereof. The armature has a concave spherical shape.

Abstract: A connecting device for connecting a sound producing device to an electronic equipment has a connector secured to the sound producing device, and having a pair of elastic contacts and an opening. A slider is provided to be inserted in the connector from the opening, and provided to press the elastic contacts of the connector against terminals of a substrate inserted in the connector from the opening.

Abstract: A surface-mounted electromagnetic sound generating body comprises: a casing of an almost rectangular parallelepiped incorporating a sound generating unit; a sound release hole formed in a vertical wall of the casing; and a sound leakage prevention member attached to the vertical wall formed with the sound release hole; wherein the sound leakage prevention member is almost equal in shape to the surface of the vertical wall formed with the sound release hole and has an opening coaxial with the sound release hole. As a result, the sound leakage prevention member and the casing are combined together as one compact piece, contributing to a reduced size and an improved effect of the sound leakage prevention.

Abstract: A case is formed by an upper case and a lower case, and a buzzer is provided in the case. Two coil springs are securely mounted in holes formed in the lower case. A lower portion of the coil spring is projected from an underside of the lower case. A pair of leads electrically connect both ends of the coil to the coil springs, respectively.