JP2008113469A - Speaker surrounding structure for maximizing cone diameter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide speaker surrounding structure for maximizing a cone diameter. <P>SOLUTION: In a compact speaker, for arranging a diaphragm (14) of a diameter larger than a conventional one for a corresponding basket (10) size, an outer basket attachment portion of a surrounding suspension (12) is formed into a special configuration shaped as an axial skirt (16a). The speaker basket (10) has a corresponding axial peripheral flange in which the inner wall of the flange is made to serve as landing (20) for adhesive attachment to the outer wall of the axial peripheral suspension flange. This special configuration retains the required resilience and capability of full excursion while enabling the substantial enlargement of an effective vibrating piston area by the arrangement of a larger cone. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

(Field of Invention)
The present invention relates to the field of audio loudspeakers / transducers, and more specifically to improving the mid-frequency and low-frequency response of full-range loudspeakers classified as a general-purpose compact.

(Background of the Invention)
Compact speakers are categorized by outer dimensions such as, for example, speaker diameter, while the main performance limitations of such speakers, namely mid-frequency and low-frequency performance, are mainly due to the diaphragm area and transition capability, That is, it is determined by the volume of air moved by the effective moving part of the diaphragm acting as a piston.

Small speakers are used in large quantities in vehicles such as automobiles, trucks, boats, and aircraft. Such loudspeakers are typically used by vehicle manufacturers and usually have specific mounting patterns that include various main cutouts and surrounding mounting holes dimensioned by standards produced in various parts of the world. Designed to be mechanically compatible with. The replacement speaker is usually required to match the mounting pattern and space originally provided on the vehicle.

Circular speakers with basket diameters ranging in size from 4 inches to 7 inches are very popular for vehicles in the United States and around the world. Most speakers in the 6 to 7 inch range are either JIS Japanese Industrial Standards that specify 6.18 inches (157 mm) or DIN used in Europe that specifies 6.69 inches (170 mm) diameter.
Manufactured with German industry standards.

Useful merit factor of criteria for size efficiency (factor of mer
It) is obtained by comparing the cone area with the entire protruding basket area. This ratio factor is tabulated below along with typical basket diameters and associated cone diameters.

表１は、従来のスピーカ構造が通常、０．５１のコーン／バスケット領域の比率を提供
することを示す。ＪＩＳタイプの（ｂ）バージョンは、ＤＩＮのコーンサイズおよび対応
する中域周波数および低周波数性能に部分的にアップグレードする一方でより小さいＪＩ
Ｓバスケットサイズを保持する取り組みを表す。

Table 1 shows that conventional speaker structures typically provide a cone / basket area ratio of 0.51. The JIS type (b) version partially upgrades to DIN cone size and corresponding mid-frequency and low-frequency performance, while smaller JIS
Represents efforts to maintain the S basket size.

Since all practical speakers are exposed to the inherent dropout of acoustic effects at low cutoff frequencies inversely proportional to the cone region (for a given cone transition), this is a full range of any size It is clear to the speakers and it is very beneficial to increase the cone diameter. This is because each percent that the cone diameter can be increased can cause the percent increment in the cone region to be greater than twice. Achieving the expansion of the cone area without increasing the outer dimensions of the speaker basket is circular,
Despite being oval or other shapes, for example in compact speakers with severely restricted basket sizes such as those used in large quantities in vehicle acoustic systems and small personal radio / stereo players, multimedia computer systems, etc. This is particularly beneficial for frequency and low frequency performance.

(Discussion of known related technology)
FIG. 1 is a cross-sectional view of an edge portion of a shaped plate metal basket 10 of a typical loudspeaker according to known techniques. A typical surrounding suspension 12 has a radially flat flange 12A for adhesively attaching to the flat sideband landing 10A in the peripheral region 10 of the basket as a peripheral portion extending outwardly, and a peripheral portion extending inwardly. As shown, it has a cone inner flange 12B for adhesive attachment to the cone 14, which is shown in part. An arcuate flexible portion 1 in the center of the annular surrounding suspension member 12
2C constrains cone 14 in the radial direction but allows the cone to vibrate axially when driven by a voice coil.

The portion of the cone 14 and its surrounding suspension 12 are normally “at res”.
t) "state is indicated by a solid line. The displaced portions of the enclosure 12 'and the cone 14' are shown in dotted lines for the maximum drive state with the cone displaced downwards. Displacement of the arcuate portion 12C of the surrounding suspension 12 provides an effective piston diameter that is somewhat greater than the cone diameter extending toward the middle region of the arcuate portion 12C.

FIG. 1A may be molded from plastic as an alternative to a shaped plate metal structure,
Or a cross-section of a basket 10A cast from a metal such as aluminum and configured to form a landing as shown, and shaped as in FIG. 1 for attachment at the outer flange 12A of the surround suspension 12 Corresponds to the cross section of the plate-like metal basket.

US Patent Application No. 5,111,510 to Mitove and No. 5,115,474 to Tsuchiya et al. Show cross-sectional views representing typical conventional speaker enclosure suspension structures. These standard cone mounting configurations are shown in FIGS. 1 and 1A, as well as outwardly extending radial flat fixed flanges on the surrounding suspension, as widely implemented in the majority of speakers of the known art. It is characterized by.

“TWI” by inventors Hazewood, Espiritu and Jorgensen
ST-LOCK MOUNTABLE VERSATILE LOUDSPEAKER
US Patent Application No. 5,867,583 to "MOUNT" includes a special surround suspension configuration with an increased cone / basket diameter ratio, which is 0.58 or conventional speakers (typically 0. 0. 51; see Table 1 above), allowing a DIN cone with a cone / basket area ratio greater than 13% to be utilized in a JIS basket.

(Object of the present invention)
Traditionally of circular cone type loudspeaker enclosure suspensions that allow the use of larger cone sizes and thus provide increased cone / basket diameters, thus enhancing intermediate and low frequency performance It is a first object of the present invention to provide an unimplemented implementation.

It is a further object to provide a new configuration and implementation system. In this system, the encircling suspension allows for a larger cone diameter by occupying less space in the outer fixed area, or further provides an at least equal cone moving capability that can be demonstrated with an equivalent conventional speaker. Consists of.

It is a further object to provide an embodiment utilizing a formed plate metal mold standard speaker basket and a basket molded from plastic or cast from metal such as aluminum.

It is a further object to provide a high quality level and reliability of adhesive attachment performance, for example, by maximizing the interface area of the adhesive attachment, with the special surround suspension attachment configuration of the present invention.

(Summary of the present invention)
The purpose mentioned above is to make use of the larger diameter diaphragms conventionally used with respect to the corresponding basket size and to create the outer periphery of the surrounding suspension in a special configuration, which The configuration substantially reduces the efficiency of the piston area by deploying a larger diameter cone and / or increasing the width of the flexible arcuate portion of the surrounding suspension while retaining the required resiliency and full mobility. This has been achieved by the loudspeaker of the present inventive subject matter by creating an outer perimeter that increases the effective vibration region.

Instead of the conventional flat form of the surrounding suspension outer mounting member that extends radially outward from the flexible arcuate part, in the novel starting point of the present invention, the outer mounting member of the surrounding suspension is an axial skirt or circular speaker. In the case of a basket, it is formed in a rearward, generally tubular form and extends forward, with an adhesive bond in the interfacial area to fit closely within the corresponding axial flange provided on the periphery of the basket. The dimensions are determined.

  The axial skirt is specially formed to maximize the adhesive fastening area.

For the various embodiments and versions, the basket may be of a type similar to a conventional JIS speaker pressed from metal, or the basket is cast from metal or a suitable plastic material It can be of a type molded from

The above and further objects, features and advantages of the present invention will be more fully understood from the following description taken in conjunction with the accompanying drawings.

  1 to 9 show sectional views of the rim region of the speaker.

2-9 illustrate embodiments and versions of speaker cone suspension systems structured in accordance with the present invention.

(Detailed explanation)
1 to 9 each show a cross-sectional view of a basket rim of a speaker.

FIGS. 1 and 1A show the surrounding suspension mounting and mounting configuration of a typical conventional speaker or molded / cast basket, respectively, using shaped plate metal as described above under prior art discussions.

Figures 2-9 illustrate different embodiments and versions of a new cone suspension enclosure implemented in accordance with the present invention.

FIG. 2 shows a basic embodiment of the present invention. Specially constructed siege suspension 16
Is made of an outer mounting member formed as a shaft skirt 16A. This shaft skirt 16
A extends forward and the prior art outwardly extending radial flat flange 1 of FIGS. 1 and 1A.
This is a fundamental departure from the traditional way of mounting via 2A.

Skirt 16A forms an interface with the inner surface of the basket rim and its lower edge rests on the landing area. Skirt 16A is attached and attached to the interface surface as shown. This basic embodiment may be utilized with a pressed sheet metal basket 10 as shown, or with a basket that is plastic molded or cast from a metal such as aluminum.

Compared to the conventional cone 14 of FIGS. 1 and 1A, the size of the cone 14A is increased, ie, the diameter of the circular speaker is increased (this is enabled by the present invention). This is apparent in FIG.

FIG. 3 illustrates an embodiment that utilizes a specially formed surround suspension 16 as in FIG. However, the skirt 16A is adapted to the annular channel. The outer wall of the annular channel is formed by the inner wall of the basket rim 18 and the basket rim 1
The inner wall 8 is formed by the thickness region 18 </ b> A of the basket 18. The basket 18 is molded from plastic or cast from a metal such as aluminum. This configuration provides better mounting reliability due to the increased adhesion area at the interface between the inner wall surface of the peripheral flange of the basket 18 and the outer wall surface of the skirt 16A of the surrounding suspension 16. .

FIG. 4 shows a version of the basic embodiment of FIG. 2, the surrounding suspension 16 being identical to FIGS. 2 and 3, which is an annular retainer ring 2 formed as shown.
It is held on the inside by zero and attached and fixed to the landing of the basket 10. The mounting skirt 16A of the suspension member 16 is connected to the rim of the basket 10 and the ring 20
It adheres to the interface having and is fixed in place.

FIG. 5 shows a version of the general embodiment of FIG. 4, wherein the return ring 22 is constituted by an annular channel that receives the mounting skirt 16 </ b> A of the suspension member 16.
The thickness of the outer wall of the channel in the ring 22 is the basket size, cone size and / or
Or it should be taken into account when setting the dimensions between the diameters of the flexible arched portions of the suspension member 16.

FIG. 6 illustrates a preferred embodiment of the present invention, in which the surrounding suspension 24 is specially formed to provide a cross-sectional flared shape as shown in the mounting landing area. This allows both the axial and radial interface regions to adhere and be fixed, so that high reliability is achieved compared to conventional fixation as in FIGS. 1 and 1A. Is acquired by an increase.

FIG. 7 shows an alternative embodiment, wherein the outer mounting skirt 26A of the surrounding suspension 26
As shown, it is doubled back and attaches and fixes to the inner side of the peripheral flange of the basket 10 as well as a flat sideband landing.

FIG. 8 shows an embodiment similar to that of FIG. 6, but the mounting skirt 28A of the special surround suspension 28 is molded to form the shape shown. This illustrated shape allows for an increased additional attachment fixation area where the flare to thickness substantially includes the entire area of the flat sideband landing 20 of the basket 10.

FIG. 9 illustrates an embodiment of the present invention and further includes a mounting adapter 32 adapted to the inside of the axial peripheral flange of the basket 10. This mounting adapter 32 allows the speaker to be mounted on the rear side of the panel.

The skirt of the surrounding suspension member 30 is produced by a narrow fixing flange 30A. The narrow fixing flange 30 </ b> A extends outward from the edge of the skirt, and is attached and fixed to the side band landing of the basket 10 and the lower portion of the annular speaker mounting adapter 32. The annular speaker mounting adapter 32 can be molded from plastic or cast from metal. The adapter 32 forms a spacer between the speaker and a panel that forms an interface with the top horizontal surface of the adapter 32. The lower end of the vertical portion of the adapter 32 that is attached and secured to the inner surface of the rim of the basket 10 and operates downward on the narrow securing flange 30A provides additional interfacial area to increase adherent fixation.

In a 4 inch circular speaker with a conventional basket with an outer diameter of 129 mm, the incorporation of most embodiments of the present invention allows the conventional cone diameter (92 mm) to be increased to 102.6 mm. become. 11 in diameter
. An increase of 5% and 22.4% in area provides a significant improvement in low frequency response. Referring to Table 1, the cone area / basket area achieved by the present invention in the 4-inch category is 0.633 compared to 0.51 for conventional speakers, which is The basket area improvement factor is a 24% increase.

In any of the embodiments, the arch portion of the surrounding suspension can be made uniform in thickness or can be specifically altered to a thickness for increased compliance. For example, it can be made thinner in the central region and / or one or both flanges can be tapered.

The present invention may be practiced in alternative configurations in which the surrounding suspension skirt flange is disposed around the outside of the basket rim flange rather than the inside as shown. As a result, the wall surface in the inner axial direction of the suspension mounting skirt forms an interface and is attached and attached to the wall surface in the outer axial direction of the basket rim flange.

Typically, in different disclosed embodiments, a specially constructed inventive suspension is a conventional second cone suspension member (typically a coaxial spider suspension arranged in a well-known manner. And is attached to the central voice coil area of the cone). However, the invention can also be implemented in embodiments in which the special surround suspension functions as the only cone suspension element.

Although shown herein for illustrative purposes as applied to a circular style basket speaker, the principles of the present invention, ie, shortening or removing the mounting flange extending outwardly of the surrounding suspension, Is not limited to other speakers. It can be implemented in a speaker having a basket of any practical shape including an oval or a rectangle.

The present invention may be embodied and embodied in other specific forms without departing from their intent and essential characteristics. Embodiments of the invention are therefore considered exemplary in all respects and not restrictive. The scope of the present invention is rather than the above description.
It is indicated by the appended claims. Accordingly, all modifications, substitutions, and alterations that fall within the meaning and range of equivalents of the claims are intended to be embraced therein.

FIG. 1 shows a typical conventional speaker discussed above under prior art discussion. FIG. 1A shows a typical conventional speaker discussed above under prior art discussion. FIG. 2 shows a basic embodiment with an encircling suspension specifically formed with an outer skirt shape. The outer surface contacts and is attached to the inner surface of the basket rim flange. FIG. 3 shows an encircling attachment similar to FIG. 2 with a skirt that is fitted with an annular passage formed in a basket that is specifically molded or cast. FIG. 4 shows an encircling attachment similar to FIG. 2 with an additional annular retainer ring. FIG. 5 shows a different version of the overall configuration of FIG. 4 with a retaining ring shaped to provide an annular mounting passage. FIG. 6 shows a preferred embodiment with an enclosure specifically shaped to provide a flared cross-sectional shape within the mounting area. FIG. 7 shows another embodiment with doubled flanges returned to the mounting area. FIG. 8 shows a version of the embodiment shown in FIG. 10 with increased interfacial area for enhanced adhesive fixation. FIG. 9 shows an embodiment in which an annular spacer is deployed. The annular spacer allows the speaker to be mounted on the rear side of the panel.

Claims (24)

A basket (18) having an external rim and a thickness region (18A);
Corn (14A),
A surrounding suspension (16) extending between the cone (14A) and the basket (18), the surrounding suspension (16) having a mounting skirt (16A);
A peripheral channel is formed around the basket (18), the channel being spaced from the first wall surface formed by the inner wall of the outer rim of the basket (18) and the first wall surface. And a second wall surface formed by the thickness region (18A) of the basket (18), the attachment skirt (16A) in an engaging manner A loudspeaker held in the channel.   The loudspeaker according to claim 1, wherein a cross-sectional shape of the surrounding suspension (16) is an arch type.   The loudspeaker according to claim 1, wherein the surrounding suspension (16) is attached to the first wall surface and the second wall surface by an adhesive.   The loudspeaker according to claim 1, wherein the basket (18) is formed from a pressed sheet metal.   The loudspeaker according to claim 1, wherein the basket (18) is molded from plastic.   The loudspeaker according to claim 1, wherein the basket (18) is cast from metal. A basket (10) having an external rim and a landing;
An annular retaining ring (20) secured to the landing;
Corn (14A),
A surrounding suspension (16) extending between the cone (14A) and the basket (10)
An enclosing suspension (16) having a mounting skirt (16A),
A peripheral channel is formed around the basket (10), the channel being spaced from the first wall surface formed by the inner wall of the outer rim of the basket (10). And a second wall surface formed by the annular retaining ring (20), the mounting skirt (16A) being retained in the channel in an engaging manner A loudspeaker.   The loudspeaker according to claim 7, wherein a sectional shape of the surrounding suspension (16) is an arch type.   The loudspeaker according to claim 7, wherein the surrounding suspension (16) is attached to the first wall surface and the second wall surface by an adhesive.   The loudspeaker according to claim 7, wherein the basket (10) is made of pressed sheet metal.   The loudspeaker according to claim 7, wherein the basket (10) is molded from plastic.   The loudspeaker according to claim 7, wherein the basket (10) is cast from metal. A basket (10) having an external rim and a landing;
An annular retaining ring (22) secured to the landing, the annular retaining ring (22) configured with an annular channel;
Corn (14A),
A surrounding suspension (16) extending between the cone (14A) and the basket (10)
An enclosing suspension (16) having a mounting skirt (16A),
The loudspeaker, wherein the mounting skirt (16A) is held in the channel in an engaging manner.   14. The loudspeaker according to claim 13, wherein a sectional shape of the surrounding suspension is an arch shape.   The loudspeaker according to claim 13, wherein the surrounding suspension (16) is attached to the first wall surface and the second wall surface by an adhesive.   The loudspeaker according to claim 13, wherein the basket (10) is formed of pressed plate metal.   A loudspeaker according to claim 13, wherein the basket (10) is molded from plastic.   A loudspeaker according to claim 13, wherein the basket (10) is cast from metal. A basket (10) having an external rim and a landing;
Corn (14A),
An enclosing suspension (30) extending between the cone (14A) and the basket (10), comprising an attaching skirt;
Mounting adapter (32) and
The mounting adapter (32) is disposed between the inner wall of the outer rim of the basket (10) and the outer wall of the mounting skirt and in the peripheral region of the basket (10). 32) a loudspeaker in which a spacer is formed between the main speaker frame and the panel, the panel forming an interface with the uppermost horizontal surface of the mounting adapter (32).   The loudspeaker according to claim 19, wherein the surrounding suspension (30) further includes a fixing flange (30A), and a lower end portion of the mounting adapter (32) acts downward with respect to the fixing flange (30A). .   20. A loudspeaker according to claim 19, wherein the surrounding suspension (30) has an arched cross-sectional shape.   The loudspeaker according to claim 19, wherein the surrounding suspension (30) is attached to the first wall surface and the second wall surface by an adhesive.   20. A loudspeaker according to claim 19, wherein the basket (10) is formed of pressed plate metal.   20. A loudspeaker according to claim 19, wherein the basket (10) is molded from plastic.

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