Headphone

In a headphone having a headband and two speaker units respectively pivotally mounted on the two distal ends of the headband, each speaker unit includes a speaker eccentrically positioned therein, an ear cushion covered on the front side of the speaker and having an eccentric opening, and a soft front covering the ear cushion and defining with the eccentric opening a sound chamber for enhancing the sound produced by the speaker and having sound holes for output of sound from the sound chamber to the user's ear.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to headphones and more particularly, to an improved structure of headphone that has the speaker of each of the two speaker units thereof disposed at an eccentric location and a sound chamber defined in each speaker unit in axial alignment with the speaker for enhancing the sound produced by the respective speaker.

2. Description of the Related Art

A conventional headphone, as shown inFIGS. 6 and 7, generally comprises a headband3and two speaker units4respectively pivotally mounted on the two distal ends of the headband3. Each speaker unit4comprises a speaker41, an annular earphone cushion42located on the front side of the speaker41and defining a center opening43. As the speaker41is disposed in the speaker unit4at the center, the speaker41is not kept in axial alignment with the user's ear accurately when the ear cushion42is attached to the user's ear, the sound produced by the speaker41will be disturbed in the center opening43before entering the user's ear, thereby lowering the sound quality.

SUMMARY OF THE INVENTION

The present invention has been accomplished under the circumstances in view. It is one object of the present invention to provide a headphone, which prevents diffusion of the sounds produced by the speakers thereof. It is another object of the present invention to provide a headphone, which enhances the sound quality.

To achieve these and other objects of the present invention, a headphone comprises a headband and two speaker units respectively pivotally mounted on the two distal ends of the headband. Each speaker unit comprises a speaker eccentrically positioned therein, an ear cushion covered on the front side of the speaker and having an eccentric opening, and a soft front covering the ear cushion and defining with the eccentric opening a sound chamber for enhancing the sound produced by the speaker and having sound holes for output of the sound from the sound chamber to the user's ear.

Each speaker further comprises a speaker holder holding the speaker, a locating ring fastened to the front side of the speaker holder to hold the ear cushion, and a back cover covered on the back side of the speaker holder opposite to the locating ring. The speaker holder has a plurality of retaining rods. The locating ring has a plurality of mounting slots for the passing of the retaining rods of the speaker holder, and a plurality of elastic retaining members respectively disposed at two opposite sides of each of the mounting slots and adapted for securing the retaining rods to the mounting slots. Thus, the ear cushion can be conveniently detached from the speaker holder for a replacement.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring toFIGS. 1-3, a headphone in accordance with a first embodiment of the present invention is shown comprising a smoothly arched headband1, and two speaker units2respectively pivotally mounted on the two distal ends of the smoothly arched headband1and securable to the ears of a person by the headband1.

Each speaker unit2comprises a speaker holder21, which has a plurality of retaining rods211and a plurality of locating pins212perpendicularly extended from the front side thereof and spaced along the circular border thereof, a speaker22carried on the speaker holder21at an eccentric location, a back cover213covered on the back side of the speaker holder21, a locating ring231, which is attached to the front side of the speaker holder21and has a plurality of mounting slots2311respectively coupled to the retaining rods211of the speaker holder21, a plurality of elastic retaining members2312respectively disposed at two opposite sides of each of the mounting slots2311for securing the respective retaining rods211after insertion of the retaining rods211into the respective mounting slots2311and a plurality of locating holes2313respectively fastened to the locating pins212of the speaker holder21, an ear cushion23, which comprises an ear cushion body232made of a sound absorbing material, for example, sound absorbing acoustic foam and affixed to the locating ring231and covered over the front side of the speaker holder21and having an eccentric opening2321corresponding to the speaker22for forming a sound chamber, and a soft front covering233, which is fixedly fastened to the locating ring231and covered over the ear cushion23to have the eccentric opening2321work as a sound chamber and has small sound holes2331corresponding to the eccentric opening2321for output of sound waves from the speaker22. The mounting arrangement between the speaker holder21and the locating ring231enables the user to detach the ear cushion23from the speaker holder21for a replacement conveniently.

During application of the headphone, the sound chamber which is formed of the eccentric opening2321of the ear cushion23and the soft front covering233enhances the sound produced by the speaker22.

FIGS. 4 and 5show a headphone in accordance with a second embodiment of the present invention. According to this second embodiment, the back side of the ear cushion23and the border of the eccentric opening2321of the ear cushion23are respectively covered with coverings24and25; a rim member26having a mounting groove261is capped on the periphery of the locating ring231; a mesh layer27is fastened to the back side of the soft front covering233and covered over the eccentric opening2321to prevent entering of external objects into the inside of the speaker unit2.