GB2480058A

GB2480058A - Inner spider or damper arrangement for a loudspeaker

Info

Publication number: GB2480058A
Application number: GB1007333A
Authority: GB
Inventors: Tzu-Chung Chang
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-05-04
Filing date: 2010-05-04
Publication date: 2011-11-09
Also published as: GB201007333D0

Abstract

A loudspeaker with an inner damper or spider 61 includes a magnetic circuit 1 forming a magnetic field, a voice coil 2 passing through the magnetic field of the magnetic circuit 1, a diaphragm 4 connected with the voice coil 2, a frame or chassis 5, and a supporting module 6 having a pillar 62 and the damper or spider 61. The pillar 62 is inside the voice coil 2 and mounted on the magnetic circuit 1 and the damper 61 is connected with either an inner surface or the top of the voice coil 2. Consequently, the supporting module 6 provides the necessary resilience for the diaphragm 4, maintains the axial movement of the voice coil 2, reduces the radial movement of the voice coil 2 to avoid the voice coil 2 knocking against the magnetic circuit 1, and enhances the convenience in large diameter design of the voice coil 2 for thinning the loudspeaker with high output power.

Description

LOUDSPEAKER WITH INNER DAMPER

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a loudspeaker with inner damper, with an outer periphery of the inner damper directly connecting with an inner surface or the top of a voice coil so as to well maintain an axial movement of the voice coil, to reduce radial movement of the voice coil, and to enhance the convenience in large diameter design of the voice coil for thinning the loudspeaker with high output power.

2. Description of the Related Art

A conventional structure of a loudspeaker, such as the outer magnetic loudspeaker shown in Fig. 1 and the inner magnetic loudspeaker shown in Fig. 2, usually includes a magnetic circuit 1, a gap ii, a voice coil 2, a damper 3, a vibration module 4, and a frame 5. The magnetic circuit 1 forms a steady magnetic field in the gap 11, and the voice coil 2 extends into the gap ii. If an AC current is applied to the voice coil 2, the energized voice coil 2 is driven by the magnetic field of the magnetic circuit 1 to vibrate. The vibration module 4 links 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 nearby and make sounds. The damper 3 is used to provide the necessary resilience for vibration of the vibration module 4 and to maintain the axial movement of the voice coil 2. The frame 5 is mounted on the magnetic circuit 1 and protrudes in a direction away from the magnetic circuit 1.

However, with the structure shown in the Figs. 1 and 2, the diameter of the voice coil 2 is restricted, which is unfavorable when the size of the loudspeaker is designed to be thin while the output power of the loudspeaker has to be risen. Therefore, the present invention provides a structure about a loudspeaker with inner damper, with an outer periphery of the inner damper directly connecting with an inner surface or the top of a voice coil so as to well maintain an axial movement of the voice coil, to reduce radial movement of the voice coil to avoid the voice coil knocking against the magnetic circuit, and to enhance the convenience in large diameter design of the voice coil for thinning the loudspeaker with high output power.

SUMMARY OF THE INVENTION

The primary objective of this invention is to provide a loudspeaker with an inner damper, which can enhance the convenience in large diameter design of the voice coil for thinning the loudspeaker with high output power.

The loudspeaker with an inner damper in accordance with an aspect of the present invention includes: a magnetic circuit, a voice coil, a vibration module, a frame, and a supporting module. The frame is mounted on the magnetic circuit. A pillar of the supporting module is mounted on the middle part of the top of the magnetic circuit while a damper of the supporting module is connected between the pillar and the inner surface or the top of the voice coil. The vibration module is connected between the voice coil and the frame. Specifically, the magnetic circuit forms a steady magnetic field for the loudspeaker; the voice coil extends into a gap of the magnetic circuit and vibrates in an axial direction when an AC current is applied to the voice coil; and the vibration module is carried by the vibrating voice coil to vibrate the air nearby and make sounds.

In comparison with conventional dampers, the supporting module can not only provide the necessary resilience for the vibration module, maintain the axial movement of the voice coil, and reduce the radial movement of the voice coil to avoid the voice coil knocking against the magnetic circuit, but also enhance the convenience in large diameter design of the voice coil for thinning the loudspeaker with high output power.

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 j of illustration only, since variances will become apparent to those skilled in

the art from this detailed description.

BRIEF DESCRIPTION OF THE DRAWINGS

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 where in: FIG 1 is a sectional side view of a conventional outer magnetic loudspeaker; FIG 2 is a sectional side view of a conventional inner magnetic loudspeaker; FIG 3 is a sectional side view of an outer magnetic loudspeaker with an inner damper in accordance with the first embodiment of the present invention; FIG 4 is a sectional side view of an inner magnetic loudspeaker with an inner damper in accordance with the second embodiment of the present invention; FIG 5 is a sectional side view of an outer magnetic loudspeaker with an inner damper in accordance with the third embodiment of the present invention; FIG 6 is a sectional side view of an inner magnetic loudspeaker with an inner damper in accordance with the fourth embodiment of the present illvelltion FIG 7 is a sectional side view of an outer magnetic loudspeaker with an inner damper in accordance with the fifth embodiment of the present illvelltion FIG 8 is a sectional side view of an inner magnetic loudspeaker with an inner damper in accordance with the sixth embodiment of the present invention; FIG 9 is a sectional side view of an outer magnetic loudspeaker with an inner damper in accordance with the seventh embodiment of the present invention; and FIG 10 is a sectional side view of an inner magnetic loudspeaker with an inner damper in accordance with the eighth embodiment of the present invention.

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.

DETAILED DESCRIPTION OF THE INVENTION

Referring to Fig. 3, in accordance with a first embodiment of the present invention, an outer magnetic loudspeaker is shown, which includes a magnetic circuit 1 having a gap 11, a voice coil 2, a vibration module 4, a frame 5, and a supporting module 6 including a damper 61 and a pillar 62.

The frame 5 is mounted on the magnetic circuit 1 and the voice coil 2 is arranged to extending 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 nearby and make sounds. Besides, the magnetic circuit 1 shown in Fig. 3 is outer magnetic type, which is used to form an outer magnetic loudspeaker.

The pillar 62 of the supporting module 6 is mounted on the middle part of the top of the magnetic circuit 1 while a center of the damper 61 is coupled with the pillar 62 and an outer periphery of the damper 61 is coupled with an inner surface of the voice coil 2. The damper 61 arranged inside the voice coil 2 can not oniy provide the necessary resilience for the vibration module 4 and reduce radial movement of the voice coil 2 to avoid the voice coil 2 knocking against the magnetic circuit 1, but also enhance the convenience in large diameter design of the voice coil 2 for thinning the loudspeaker with high output power.

Referring to Fig. 4, in accordance with a second embodiment of the present invention, an inner magnetic loudspeaker is shown, which has similar structure and operation of those of the first embodiment, but a magnetic circuit 1 of inner magnetic type is used.

Referring to Fig. 5, in accordance with a third embodiment of the present invention, an outer magnetic loudspeaker is shown, which has similar structure and operation of those of the first embodiment, but the outer periphery of the damper 61 is coupled with the top of the voice coil 2.

Referring to Fig. 6, in accordance with a fourth embodiment of the present invention, an inner magnetic loudspeaker is shown, which has similar structure and operation of those of the third embodiment, but a magnetic circuit 1 of inner magnetic type is used.

Referring to Fig. 7, in accordance with a fifth embodiment of the present invention, an outer magnetic loudspeaker is shown, which has similar structure and operation of those of the first embodiment while an additional outer damper 7 is used.

Referring to Fig. 8, in accordance with a sixth embodiment of the present invention, an inner magnetic loudspeaker is shown, which has similar structure and operation of those of the fifth embodiment, but a magnetic circuit 1 of inner magnetic type is used.

Referring to Fig. 9, in accordance with a seventh embodiment of the present invention, an outer magnetic loudspeaker is shown, which has similar structure and operation of those of the third embodiment while an additional outer damper 7 is used.

Referring to Fig. 10, in accordance with a eighth embodiment of the present invention, an inner magnetic loudspeaker is shown, which has similar structure and operation of those of the seventh embodiment, but a magnetic circuit 1 of inner magnetic type is used.

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.

Claims

WHAT IS CLAIMED IS: 1. A loudspeaker with inner damper, comprising:a magnetic circuit 1 forming a magnetic field;a voice coil 2 passing through the magnetic field of the magnetic circuit 1; a vibration module 4 connected with the voice coil 2; a frame 5 connected with the vibration module 4; and a supporting module 6 having a pillar 62 and a damper 61, wherein said loudspeaker is characterized in that the pillar 62 of the supporting module 6 is arranged inside the voice coil 2 and mounted on the magnetic circuit 1, and the damper 61 of the supporting module 6 connects with an inner surface or the top of the voice coil 2.
2. The loudspeaker with inner damper as defined in claim 1, wherein the magnetic circuit 1 is inner magnetic type.
3. The loudspeaker with inner damper as defined in claim 1, wherein the magnetic circuit 1 is outer magnetic type.
4. A loudspeaker substantially as hereinbefore described with reference to and as shown in Figures 3 to 10 of the accompanying drawings.