Loudspeaker mounting frame, loudspeaker and cabinet comprising a loudspeaker

1. A loudspeaker mounting frame having a central opening for receiving a loudspeaker membrane and a plurality of through holes surrounding said central opening for receiving fixing means, wherein said through holes are tapered,

said plurality of through holes that extend between front and rear main surfaces surrounding said central opening for receiving fixing means, wherein said mounting frame has a number of bosses formed on at least one of said main surfaces and said through holes extend through said bosses, and

wherein one of said main surfaces has the bosses formed on it and the narrow side each through hole is formed at said one main surface.

2. The loudspeaker mounting frame of claim 1 , wherein said through holes have a tapering angle of 5° to 15°.

3. A loudspeaker mounting frame according to claim 1 , wherein said bosses are segments of a sphere.

4. A loudspeaker comprising:

a mounting frame having a central opening for receiving a loudspeaker membrane and a plurality of through holes surrounding said central opening for receiving fixing means, wherein said through holes are tapered; and

a sound-emitting membrane mounted in the central opening of said mounting frame,

said plurality of through holes that extend between front and rear main surfaces surrounding said central opening for receiving fixing means, wherein said mounting frame has a number of bosses formed on at least one of said main surfaces and said through holes extend through said bosses, and

wherein one of said main surfaces has the bosses formed on it and the narrow side of each through hole is formed at said one main surface.

5. The loudspeaker according to claim 4 , wherein an outer edge of the sound-emitting membrane is connected directly to an edge of said central opening of the mounting frame.

6. The loudspeaker according to claim 4 , wherein the sound-emitting membrane is directly connected to a support ring mounted in the central opening of said mounting frame.

7. A loudspeaker cabinet having a support structure to which a loudspeaker mounting frame Is mounted, and a perforated shell facing a sound-emitting membrane,

the loudspeaker mounting frame having a central opening for receiving a loudspeaker membrane and a plurality of through holes that extend between front and rear main surfaces surrounding said central opening for receiving fixing means wherein said mounting frame has a number of bosses formed on at least one of said main surfaces and said through holes extend through said bosses,

wherein said through holes are tapered, and

wherein one of said main surfaces has the bosses formed on it and the narrow side of each through hole is formed at said one main surface.

8. The loudspeaker cabinet according to claim 7 , wherein said support structure has at least one tip portion matingly engaging one of said through holes and at least one bore aligned with another one of said through holes for receiving a fixing bolt inserted through said through holes.

9. A loudspeaker cabinet having a support structure to which a loudspeaker mounting frame is mounted, and a perforated shell facing a sound-emitting membrane,

the loudspeaker mounting frame having a central opening for receiving a loudspeaker membrane and a plurality of through holes that extend between front and rear main surfaces surrounding said central opening for receiving fixing means, wherein said mounting frame has a number of bosses formed on at least one of said main surfaces and said through holes extend through said bosses,

wherein said support structure has at least one tip portion matingly engaging one of said through holes and at least one bore alleged with another one of said through holes for receiving a fixing bolt inserted through said through holes, and

wherein said fixing bolt has a shaft extending through said through hole and a head having a diameter which is greater than;that of the through hole, and the boss is in contact with the head of the bolt.

10. The loudspeaker cabinet according to claim 9 , wherein said support structure Is Integrally formed with the perforated shelf.

11. The loudspeaker cabinet according to claim 10 , wherein said support structure comprises a number of stubs formed on a cabinet element, the mounting frame is held in contact with resting surfaces of these stubs, the at least one tip portion and the at least one bore each being formed at one of said resting surfaces.

12. The loudspeaker cabinet according to claim 11 , wherein the mounting frame has a mounting surface portion surrounding the central opening, and said surface portion is located between a plane defined by the resting surfaces of said stubs and the perforated shell.