Patent Application
20150086065
1. Field of the Invention
The present invention relates to a loudspeaker with double dampers and, more particularly, to a loudspeaker that are equipped with two dampers to improve the overall vibration effect thereof.
2. Description of the Related Art
A conventional structure of a loudspeaker, such as the outer magnetic loudspeaker shown in
However, with the structure shown in the
The primary objective of this invention is to provide a loudspeaker with double dampers, which can enhance the convenience in large diameter design of the voice coil for reducing the thickness of the loudspeaker with high output power while providing an improved vibration effect thereof.
The loudspeaker with double dampers in accordance with an aspect of the present invention includes a magnetic circuit forming a magnetic field, a voice coil passing through the magnetic field of the magnetic circuit, a vibration module connected with the voice coil, a frame connected with the vibration module, and a supporting module having a pillar and first and second dampers. The pillar of the supporting module is arranged inside the voice coil and mounted on the magnetic circuit. The first damper of the supporting module is connected between the pillar and an inner surface of the voice coil, and the second damper is connected between an outer surface of the voice coil and an inner surface of the frame.
In a form shown, the magnetic circuit is of an inner magnetic type or an outer magnetic type.
In the form shown, the loudspeaker further comprises a top post mounted on the pillar.
In the form shown, the first damper is firmly secured between the pillar and the top post.
Further scope of the applicability of the present invention will become apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific examples, while indicating preferable embodiments of the invention, are given by way of illustration only, since variances will become apparent to those skilled in the art from this detailed description.
The present invention will become more fully understood from the detailed description given hereinbelow and the accompanying drawings which are given by way of illustration only, and thus are not limitative of the present invention, and wherein:
In the various figures of the drawings, the same numerals designate the same or similar parts. Furthermore, when the term “inner,” “outer,” “first,” “second,” “third,” “fourth,” “fifth,” “sixth,” “seventh,” “eighth,” “top,” and similar terms are used hereinafter, it should be understood that these terms are reference only to the structure shown in the drawings as it would appear to a person viewing the drawings and are utilized only to facilitate describing the invention.
Referring to
The frame 5 is mounted on the magnetic circuit 1 and the voice coil 2 extends into the gap 11 of the magnetic circuit 1. When an AC current is applied to the voice coil 2, the voice coil 2 is driven by a magnetic field provided by the magnetic circuit 1 to vibrate. The vibration module 4 is connected between the voice coil 2 and the frame 5, and thus the driven voice coil 2 carries the vibration module 4 to vibrate together, so as to vibrate the air and produce sounds. Besides, the magnetic circuit 1 shown in
The pillar 62 of the supporting module 6 is mounted on the middle part of the top of the magnetic circuit 1. In this regard, a center of the first damper 61a is coupled with the pillar 62 while an outer periphery of the first damper 61a is coupled with an inner surface of the voice coil 2, and a center of the second damper 61b is coupled with an outer surface of the voice coil 2 while an outer periphery of the second damper 61b is coupled with an inner surface of the frame 5. The first damper 61 a arranged inside the voice coil 2 not only can provide the required resilience of the vibration module 4 and reduce radial movement of the voice coil 2 to prevent the voice coil 2 from knocking against the magnetic circuit 1, but also can enhance the convenience in large diameter design of the voice coil 2 for reducing the thickness of the loudspeaker with high output power. In this embodiment, the outer magnetic loudspeaker employs two dampers 61a and 61b, one of which is arranged inside the voice coil 2 and the other one is arranged outside of the voice coil 2. In this regard, the two dampers 61a and 61b are located at two sides of the vibration module 4 in the radial direction and are used to fix the voice coil 2 and the vibration module 4. Advantageously, the strength of the radial vibration of the vibration module 4 can be enhanced and the radial vibration of said system 4 can be balanced. Furthermore, since the two dampers 61a and 61b are located at two sides of the vibration module 4 in the radial direction, a suspension system having an improved Kms is formed. The term “Kms” is a common mechanical unit and is a reciprocal of Cms. “Kms” varies as the voice coil 2 moves. The suspension system is considered as a linear system when the Kms values of the suspension system moving in two opposite directions are equal, namely, Kms(−X)=Kms(X). In this case, the suspension system has an improved Kms symmetry.
Referring to
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Referring to
Although the invention has been described in detail with reference to its presently preferred embodiment, it will be understood by one of ordinary skill in the art that various modifications can be made without departing from the spirit and the scope of the invention, as set forth in the appended claims.
