Embedded multimedia speaker structure

[0001] (a) Field of the Invention

[0002] The invention relates to an embedded multimedia speaker structure, and more particularly, to a speaker especially for assembling to a disk drive housing without occupying space of a desktop, thereby making peripherals of the computer more well-organized and artistic in appearance, as well as increasing usable area of the desktop.

[0003] (b) Description of the Prior Art

[0004] Current computer speakers on the market are independent computer peripherals that generally come in a number of two, and are disposed at two sides of a computer desk or a computer host. Rear ends of the speakers are plugged with wires connecting to speaker sockets at a rear end of the computer for balanced sound effects. However, in order to obtain optimal sound effects, it is inevitable that the speakers have rather large volumes, which occupy a great portion of an area on the desk. The speakers may be alternatively placed under the desk, but sound effects then become unsatisfactory and ground space is yet occupied. These are shortcomings of prior speakers. Suppose volumes of the speakers are decreased, it is likely that the comparatively smaller speakers have inadequate sound effects, and thus adding another drawback to the prior invention. Therefore, multimedia speakers occupying minimal space on a desktop while also offering excellent stereophonic effects are needed.

[0005] The primary object of the invention is to provide an embedded multimedia speaker for directly assembling within a 5-and-¼-inch disk drive housing. The speaker is joined with a computer host without requiring additional arrangement thereof on a desktop, and thus saving space of the desktop for neatness and pleasing appearance. The characteristics of the invention further comprise better stereophonic effects in harmony with attentive assembly and coordination.

[0006] To achieve the aforesaid object, the invention comprises five-facet housing having a same dimension as a 5-and-¼-inch disk drive; a recess disposed at a bottom center portion of the housing; a bass speaker disposed at the recess and having a bell thereof facing downward; a circuit board having play function disposed at a rear end of an interior of the housing and for controlling sounds; a panel enclosing a front end of the housing, and having a speaker provided at two sides thereof, respectively; and two sound guide tubes having an end thereof connected to a rear end of the speakers, respectively, and the other end thereof arranged to an exterior of the housing, respectively. Using the aforesaid structure, a multimedia speaker is assembled for disposing within a 5-and-¼-inch disk drive housing without occupying additional space of a desktop.

[0014] To better understand the contents of the invention, detailed descriptions shall be given with the accompanying drawings hereunder.

[0015] Referring to FIGS. 1, 2 and 6, the invention comprises a five-facet housing 10 having a same dimension as a 5-and-¼-inch disk drive, wherein a bottom center portion of the housing 10 is provided with a recess 11 for accommodating a bass speaker 50. The bass speaker 50 has a bell thereof facing downward, such that a sufficient space is reserved in front of the bass speaker 50 for releasing pressure, and forward acoustic waves are allowed with a certain space for discharging as shown in FIG. 4. Referring to FIGS. 4 and 6, a rear end of the recess 11 is sunken and provided with a pressure-releasing groove 12 having an appropriate width for dismissing sound pressure to a rear end thereof. In addition, referring to FIGS. 1 and 2, a circuit board 30 having play function is disposed at an inner rear end of the housing 10.

[0016] Referring to FIGS. 1, 2 and 3, a panel 20 is used for enclosing a front end of the housing 10, and has a sound guide tube 200 extended toward a center within the housing 10, so as to transmit sounds of the bass speaker 50 to the front end. A speaker 21 is provided at two sides of the panel 20, respectively, and an outer side of each speaker 21 is inclined toward a rear thereof at an inclined angle θ between 10 and 20 degrees, so that sounds are spread outward for better stereophonic presence effects. Furthermore, two sound guide tubes 40 have an end thereof connected to a rear end of left and right speakers 21, respectively, and the other end thereof arranged to an exterior of the housing 10, respectively. The sound guide tubes 40 are for forwarding currents of reverse acoustic waves of the left and right speakers 21 to an exterior, and for suppressing shifting of cavity resonance frequency in the two speakers 21 caused by large sound pressure. Also, the exterior of the panel 20 is disposed with a plurality of tuning switches 22.

[0017] FIG. 7 shows a circuit block diagram of a circuit board 30 and related components thereof according to the invention. Referring to FIGS. 1 and 7, a portion of stereo sound signals is amplified via a pre-amplifier 31 and divided into two parts. One part is amplified via a stereo amplifier 37 and forwarded to the internal left and right speakers 21. The other part is passed through a mixer low-pass filter 32, inverted 180 degrees by a pre-amplifier 33, forwarded to a bass power amplifier 34 and the bass speaker 50, and thus completing driving of the internal speakers. The other portion of stereo sound signals is delivered to a low-noise earphone power amplifier 36 for driving earphones 60 in order to provide stereo sounds, or to provide a microphone 61 with sounds. Moreover, an additional earphone detector 35 is disposed for determining if the internal speakers 21 are mute by detecting whether the earphones 60 are inserted or not.

[0018] Referring FIG. 5, an embodiment according to the invention may directly be assembled within a 5-and-¼-inch disk drive housing, and has the following excellences:

• [0019] 1. The invention has a dimension same as that of a disk drive and may be directly assembled to a computer host, and hence space occupied on a desktop is economized to further provide neatness and pleasing appearance.
• [0020] 2. According to the invention, a bass speaker is provided therein for discharging forward acoustic waves, small speakers having inclined angles toward rear ends thereof are arranged at the two front sides for obtaining stereophonic sound effects, and sound guide tubes at the rear are capable of minimizing noises as well as providing sound discharging functions.

[0021] It is of course to be understood that the embodiment described herein is merely illustrative of the principles of the invention and that a wide variety of modifications thereto may be effected by persons skilled in the art without departing from the spirit and scope of the invention as set forth in the following claims.