MXPA03006443A

MXPA03006443A - Speaker surround structure for maximizing cone diameter.

Info

Publication number: MXPA03006443A
Application number: MXPA03006443A
Authority: MX
Inventors: S Esperitu Ronnie
Original assignee: Hartman Internat Ind Inc
Priority date: 2001-01-19
Filing date: 2002-01-18
Publication date: 2004-10-15
Also published as: KR100902203B1; EP2317775B1; JP2008113469A; EP1364556A4; CN101291548A; CN101291548B; WO2002058433A1; EP1364556A1; KR20030066822A; EP1364556B1; CN1496662A; WO2002058433A8; JP2004521538A; JP2012039647A; KR20080081371A; EP2317775A1; JP4926992B2

Abstract

In a compact speaker, to enable the deployment of a diaphragm (14) of larger diameter than is used conventionally for the corresponding basket (10) size, the outer basket-attachment portion of the surround-suspension (12) is made in a special configuration shaped as an axial skirt (16a), i.e. generally tubular in the case of a round speaker basket, instead of the planar shape of the basket-attachment portion of conventionally speakers. The speaker basket (10) of the present invention is made with a corresponding axial peripheral flange of which the inner wall made to serve as a landing (20) for adhesive attachment to the outer wall of the axial surround suspension flange. This special configuration retains the required resilience and capability of full excursion while enabling enlargement of the effective vibrating piston area substantially by deployment of a larger cone. The basket may be of the type that is stamped from metal, e.g. as in popular conventional speakers, or in other embodiments it may be cast from metal or molded from suitable plastic material. The outer attachment member of this surround-suspension is preferably configured in a special cross-sectional shape that maximizes the area available for adhesive attachment to the basket.

Description

PERIPHERAL SUSPENSION STRUCTURE OF ALTOPARLATE TO INCREASE TO THE MAXIMUM THE DIAMETER OF CONE FIELD OF THE INVENTION The present invention relates to the field of audio loudspeakers / transducers, and more particularly to the improvement of midrange and low frequency response of full-range loudspeakers of popular compact size categories.

BACKGROUND OF THE INVENTION Compact loudspeakers are categorized by their external dimensions, for example, the diameter of a round loudspeaker, while their main operating limitation, ie, mid-range and low frequency operation, is determined primarily through the diaphragm area and excursion capacity, that is, the volume of air moved through the effective movement portion of the diaphragm acting as a piston. Large quantities of small-sized loudspeakers are used in vehicles such as cars, trucks, boats, air craft, etc. Such loudspeakers are generally designed to mechanically conform to a particular mounting pattern used by vehicle manufacturers, typically including a main cut and peripheral mounting holes, sized according to standards originating from different regions of the world. Replacement loudspeakers usually require adjustment in the mounting pattern and space originally provided in the vehicle. Round loudspeakers having a basket diameter on the size scale of 10.16-17.78 centimeters are in extremely high vehicle use in the United States and throughout the world. Most of these on the scale of 15.24-17.78 centimeters are made to either a Japanese JIS standard that specifies 157 mm in diameter or a German DIN standard used in Europe that specifies 170 mm in diameter. A useful factor of merit with respect to efficiency in size is obtained by comparing the area of the cone with the total projected basket area. This ratio factor is tabulated along with typical basket diameters and is associated with cone diameters as follows: TABLE 1 KEY DIMENSIONS IN COMPACT HIGHLIGHTS POPULARS Normal Size Version Cone diameter Diameter of mm Area Basket cone / area of Mm basket 10. 16 73 102.3 0.51 13. 33 92 129 0.51 16. 51 Japan JIS (a) 111.8 157 0.51 (b) 115.3 157 0.54 Europe DIN 119.3 170 0.49 The Table shows that the structure of conventional loudspeakers typically provides a cone / basket area ratio = 0.51. Version (b) of the JIS type represents an effort to update part of the form towards the size of the DIN cone and corresponding operating capacity of the mid range and low frequency while it is related to the smaller JIS basket size. Since all practical loudspeakers undergo an inherent interruption of acoustic efficiency at a cutoff frequency at the lower end in inverse proportion to the area of the cone (for a given cone excursion), clearly for a full-range loudspeaker of any size It is very beneficial to increase the diameter of the cone since each percentage that the diameter of the cone can be increased produces more than double the increase in the percentage in the area of the cone. By achieving the increased cone area without increasing the outer dimensions of the loudspeaker basket, whether it is round, oval or otherwise, it is particularly beneficial for the midrange or low frequency operation of compact loudspeakers that are subject to strict restrictions on the size of the basket, for example, as it is used in large quantities in vertical sound systems as well as in small personal radio / stereo players, multimedia computer systems, etc.

DISCUSSION OR RELATED KNOWN TECHNIQUE Figure 1 is a cross section taken on a portion of the edge of a basket formed of sheet metal 10 of a typical loudspeaker of the known art. A typical peripheral suspension 12 has as its peripheral portion extending outwardly a radial plane outer flange 12A followed by an adhesive bond to a settlement or flat margin land 10A in a peripheral region of the basket 10, and has as its peripheral portion extending internally a conical internal flange 12B for adhesive connection to the cone 14, shown in part. The central arcuate flexible portion 12C of the annular peripheral suspension member 12 restrains the cone 14 radially but allows it to vibrate in an axial direction when it is directed through the voice coil.

The position of the cone 14 and its peripheral suspension 12 are shown in solid lines for the normal "at rest" condition. The displaced position of the periphery 121 and the cone 14 'is shown in dotted lines for a maximum driving condition at a lower maximum cone excursion. The displacement of the arcuate portion 12C of the peripheral suspension 12 provides an effective piston diameter that is somehow larger than the diameter of the cone extending to the middle region of the arcuate portion 12C. Figure 1A is a cross section of a basket 10A which, as an alternative for the construction of pressed sheet metal, is molded from a plastic or metal mold such as aluminum, and configured to form a settlement or soil as shown, equivalent to that of a pressed sheet metal basket as in Figure 1, for adhesive bonding of the outer flange 12A of the peripheral suspension 12. US patents Nos. 5,115,510 of itobe and 5,115,474 of Truchita et al. Show cross-sectional drawings representing the peripheral suspension structure of conventional loudspeakers. Its standard cone mounting configuration has a radial flat clamping flange extending outwardly in the peripheral suspension, as shown in Figures 1 and 1A as universally practiced in the vast majority of loudspeakers of the known art. The patent of E.U.A. No. 5,867,586 of the inventors Hazelwood, Spirit and Jorgensen for ASSEMBLY OF VERSATILE VERSATILE STANDING OF ROLLER PADLOCK (TWIST-LOCK MOUNTABLE VERSATILE LOUDSPEAKER MOUNT) describes unconventional mounting systems including special peripheral suspension configurations that produce a cone diameter ratio / basket increased; for example, enabling a DIN cone to be used in a JIS basket, achieving a one-basket area ratio of 0.58, that is, more than 13% increase over those conventional speakers (typically 0.51, refer to Table 1 above).

OBJECTS OF THE INVENTION It is a principal object of the present invention to provide non-conventional mountings for peripheral suspension of round cone type loudspeakers that allow the use of larger cone sizes than conventional ones and thus provide an increased cone / basket diameter, and for consequently they improve the operation of medium range and low frequency. It is a further object to provide novel configuration and mounting systems where the peripheral suspensions are configured in a way that allows a larger cone diameter occupying less space in the outer clamping region and still provide at least equal cone excursion capability available in a comparable conventional speaker.

It is a further object to provide embodiments using standard metal sheet-type loudspeaker baskets as well as baskets that are molded from a plastic or metal mold such as aluminum. It is a further object, in the special peripheral suspension joint configurations of the invention to provide a high level of quality for the performance of the adhesive bond and reliability, for example, by maximizing the interface area of the adhesive bond.

COMPENDIUM OF THE INVENTION The aforementioned objects have been achieved by the loudspeaker of the subject matter of the present invention using a diaphragm of larger diameter than conventionally used for the corresponding basket size, and making the outer peripheral portion of the peripheral suspension in a special configuration that retains the required elasticity and total excursion capacity while elongating the effective piston area substantially by deploying a larger diameter cone and / or increasing the width of the flexible arched portion of the peripheral suspension and thereby increasing the area of effective vibration thereof . Instead of the conventional flat shape of the outer joining member of the peripheral suspension extending radially outward from the flexible arcuate portion, in the novelty output of the present invention, the external joint member of the peripheral suspension is made in the form of an axial skirt, that is, generally tubular in the case of a round speaker basket, extending outwardly and dimensionally to adjust tightly within a corresponding axial flange provided on the periphery of the basket, extending forward, with the adhesive fastener in the interconnected region. The axial skirt can be specially configured to maximize the adhesive clamping area. For various embodiments and versions, the basket may be of the type that is stamped in metal, similar to conventional JIS speakers, or it may be of the type that is molded of metal or molded of suitable plastic material.

BRIEF DESCRIPTION OF THE DRAWINGS The above and additional objects, aspects, and advantages of the present invention will be more fully understood from the following description taken with the accompanying drawings, wherein: Figures 1-9 show a cross-sectional view of a region of edge of a loudspeaker. Figure 1 and Figure 1A. describe typical conventional loudspeakers, horns discussed above under the Discussion of Known Technique. Figures 2-9 describe embodiments and versions of cone loudspeaker systems structured in accordance with the present invention. Figure 2 describes a basic embodiment having the peripheral suspension specially formed with an outer skirt, with its outer surface interconnected and adhesively bonded to the inner surface of the flange at the edge of the basket. Figure 3 describes a peripheral joint similar to Figure 2 with the skirt fitted into an annular channel formed in a specially cast or mold basket. Figure 4 describes a peripheral joint similar to Figure 2 with an annular retaining ring added. Figure 5 describes a different version of the general configuration of Figure 4 with the retaining ring configured to provide an annular mounting channel. Figure 6 describes a preferred embodiment with the periphery specially configured to provide a flared cross-sectional shape in the mounting region. Figure 7 describes an alternative embodiment with a double rear wall flange in the mounting region. Figure 8 describes a version of the embodiment shown in Figure 10 with the increased interface area to improve the adhesive hold. Figure 9 describes an embodiment deploying an annular spacer that allows the loudspeaker to be mounted on the back of a panel.

DETAILED DESCRIPTION Figures 1-9 each show a cross-sectional view of a basket edge region of a loudspeaker. Figures 1 and 1A describe typical peripheral loudspeaker mounting and joining configurations using formed metal foils or molded / mold baskets respectively, as discussed above under Discussion of Known Art. Figures 2-9 describe different embodiments and versions of peripheral suspension assemblies of novel cones configured in accordance with the present invention. Figure 2 describes a basic embodiment of the present invention. A specially configured peripheral suspension 16 is made with its outer joining member formed as an axial skirt 16A extending backwards, constituting a basic outlet of the conventional practice of the connection through a radial-plane flange extending outwardly of the prior art 12A. shown in Figures 1 and 1A. The skirt 16A is connected to its internal surface of the edge of the basket and its lower edge rests in the region of settlement or terrain. The skirt 16A is adhesively bonded to the interconnected surfaces as shown. This basic embodiment can be used with a basket of pressed metal sheet 10 as shown, or with a basket that is molded of plastic or metal mold such as aluminum. The increased size of the cone 14A, ie, increased diameter in the case of a round loudspeaker, made possible by the present invention, is evident in Figure 2 compared to the conventional cone 14 in Figures 1 and 1A. Figure 3 describes a modality using the peripheral suspension specially configured 16 as in Figure 2; however, the skirt 16A is fitted within an annular channel whose outer wall is formed by the inner wall of the basket edge 18 and whose inner wall is formed by a thickened region 18A of the basket 18, which is molded of plastic or metal mold such as aluminum. This configuration provides superior bonding reliability due to the increased adhesive area at the bottom between the inner wall surface of the peripheral flange of the basket 18 and the skirt of the outer wall surface 16A of the peripheral suspension 16. Figure 4 describes a version of the basic modality of the Figure 2 wherein the peripheral suspension 16 is the same as in Figures 2 and 3, but is retained in the interior through the annular retaining ring 20 configured as shown and adhesively attached to the settlement of the basket 10. The skirt of 16A of suspension member 16 is adhesively held in place to the edge of the basket 10 and to the interface with the ring 20. Figure 5 describes a version of the general embodiment of Figure 4 wherein the retaining ring 22 is configured with an annular channel that accepts the connecting skirt 16A of the suspension member 16. The thickness of the external wall of the channel in the ring 22 must be taken into account in the sizing of the basket size, the size of the cone and / or the extension of the flexible arcuate portion of the suspension member 16. Figure 6 discloses a preferred embodiment of the present invention wherein the peripheral suspension 24 is specially configured for to provide a flared cross-sectional shape, as shown, in the assembly seating region; this allows both the axial and radial interface regions to be adhesively held, so that high reliability is obtained through the increase in the clamping area compared to that of conventional clamping as in Figures 1, 1A. Figure 7 describes an alternative embodiment wherein the outer mounting skirt 26A of the peripheral suspension 26 has a double back wall by itself, as shown and adhesively fastened to the inside of the peripheral flange of the basket 10 as well as the settling of flat margin. Figure 8 depicts a similar modality to that of Figure 6 but with the mounting skirt 28A of special peripheral suspension 28 molded to form the shown shape which is flared to the thickness allowing an increased additional area of adhesive fit including substantially the area complete of the flat margin settlement 20 of the basket 10. Figure 9 describes an embodiment of the invention that also includes a mounting adapter 32, fitted inside the peripheral peripheral of the basket 10, which allows the loudspeaker to be mounted on the rear part of the basket. a panel. The skirt of the peripheral suspension member 30 is made with a narrow fastening flange 30A extending outwardly from the edge of the skirt and adhesively attached to the settlement of the basket margin 10 and to a lower portion of a mounting adapter of the loudspeaker 32, which It can be molded from plastic or formed / metal mold. The adapter 32 forms a spacer between the loudspeaker and a panel interconnecting the upper horizontal surface of the adapter 32. Attached adhesively to the inner surface of the edge of the basket 10, the lower end of the vertical portion of the adapter 32 acts downwardly on the narrow clamping tab 30A provides an additional interconnection area to improve adhesive clamping. In a 10.16 cm round loudspeaker with a conventional basket having 129 mm external diameter, the incorporation of most of the modalities of the present invention will allow the conventional cone diameter (92 mm) to be increased to 102.6 mm; an increase of 11.5% in diameter and 24.4% in the area that provides a significant improvement in low frequency response. With reference to Table 1, the area of cone / basket area achieved by the present invention in the category of 10.16 cm is 0 633, compared to 0.51 of conventional loudspeakers; an increase of 24% in this factor of merit of the area with the area of the basket. In either embodiment, the arcuate portion of the peripheral suspension may be made uniform in thickness or especially varied in thickness for increased compliance, for example, configured to be thinner in a central region and / or one or both of the projections may be narrow. The invention can be implemented in an alternative configuration wherein the flange flange of the peripheral suspension is disposed around the outside of the rim flange of the basket instead of inside as shownIn this way, the internal wall surface of the suspension skirt can be interconnected and adhesively bonded to the external axial wall surfaces of the edge flange of the basket. Typically, in the various embodiments described, the specially configured peripheral suspension of the invention functions in cooperation with a second cone suspension member, typically a concentric spider suspension deployed in a well-known manner attached to the central voice coil region of the cone; however, the present invention can also be practiced in embodiments wherein the special peripheral suspension functions as the cone suspension element alone.

Although shown herein for purposes of illustration as applied to round-style basket loudspeakers, the principle of the present invention, ie, the abbreviation or removal of the mounting flange extending outwardly of the peripheral suspension, of the present invention is not limited to round-style loudspeakers; it can be practiced with loudspeakers having basket of any particular shape including oval or rectangular. This invention can be modalized and practiced in other specific forms without departing from the spirit and essential characteristics thereof. The present modalities are therefore considered in all aspects as illustrative and not restrictive. The scope of the invention is indicated by the appended claims in lieu of the foregoing description. All variations, substitutions and changes that fall within the meaning and range of equivalency of the claims are therefore intended to be encompassed here.

Claims

1. A loudspeaker peripheral cone support system to maximize the effective piston area of a cone facing backward forming an acoustic diaphragm in a full range loudspeaker having a basket constituting a main loudspeaker frame with an outer boundary, in a frontal plane perpendicular to a central axis of the loudspeaker, encompassing a designated basket area, said peripheral cone system comprises: a peripheral suspension, made and configured to encircle the cone and provide support thereto in a form that allows its vibration for acoustic purposes, configured with a transverse sectional shape, taken on the radial axis of the loudspeaker, defining (a) a main flexible portion, made and configured to allow functional vibration of the cone for acoustic purposes, extending between the internal and external suspension points located substantially in the frontal plane, (b) a tab d cone cone extending from the point of internal suspension, overlapping and adhesively attached to the peripheral suspension joint joining margin, and (c) an axial basket joining skirt extending backward from the external suspension point and configured as a whole to overlap and interconnect with a peripheral region of the basket, joining means for securing the skirt of union of the basket to said peripheral suspension to a peripheral region of the basket; the cone being made to have an area in the frontal plane at the point of interior suspension that is substantially greater than that of a cone cone of a comparable conventional loudspeaker having a cone suspension configured with a conventional flat radial basket joining flange, for a given basket area and a given extension dimension of the main flexible portion of said peripheral suspension measured between the internal and external suspension points; and said peripheral suspension having an external profile encompassing an area in the frontal plane that is at least 95% of that of the basket.

2. The loudspeaker cone peripheral support system according to claim 1, wherein said joining means comprises: a hanger-joining flange of substantially uniform thickness, formed as part of the basket and axially extending from a outer end of a flat margin seating area radially disposed about the basket margin, extending in a forward direction of the front plane, having a predetermined shape and size to overlap the fit of the basket tie skirt of said peripheral suspension. The peripheral loudspeaker cone support system according to claim 2, wherein the basket connecting skirt of said peripheral suspension is made to have a peripheral outer wall surface configured and of a size that closely fits into the internal wall of said basket suspension attaching flange, the adhesive material being applied in the assembly in a manner that permanently attaches the surface of the outer wall of the basket connecting skirt of said peripheral suspension member to the inner wall of said suspension member. suspension link tab of the basket. The peripheral loudspeaker cone support system according to claim 3, wherein said basket attaching skirt of said peripheral suspension member is configured in a molding process to form a cross-sectional configuration that is flared to an increased shore thickness defining a flat basket joining surface substantially perpendicular to the outer surface of said basket joining skirt, made and configured to intercommunicate with the flat margin settlement of said loudspeaker basket, provided contiguous with the flange of the basket. peripheral union thereof and extending radially inward thereof, said adhesive material being applied between the joining surface of the flat basket of the suspension joint flange and the flat margin settlement of said loudspeaker basket, in such a manner to substantially increase a total interconnected area bonded by adhesive. The peripheral loudspeaker cone support system according to claim 3, wherein said joining means comprise: a peripheral channel of a substantially uniform width formed around said loudspeaker basket, said channel having a first wall surface formed by the inner wall of said basket-joining flange of the basket and having a second and opposite wall surface spaced from the first wall surface by a substantially uniform width to thereby provide a tight closure of the basket-joining skirt of said basket. peripheral cone suspension, inserted and retained in said channel in an even shape, further secured in place through adhesive material applied in the initial assembly in all interconnected areas between them. The peripheral loudspeaker cone support system according to claim 5, further comprising: an integrated region forming a wall surface separated by a uniform distance from the inner surface of said suspension link flange, thereby providing the Second channel wall surface; said loudspeaker basket, including said suspension joint flange, being formed of plastic material in a molding process. The peripheral loudspeaker cone support system according to claim 5, further comprising: a wall member, attached to the flat margin settlement of said basket separated by a uniform distance from the inner surface of said joint flange of suspension, thus providing the second wall surface of the channel; said loudspeaker basket, including said suspension joint flange, being formed of sheet metal in a stamping process. The peripheral loudspeaker cone support system according to claim 7, wherein the molding member is further configured to have a cross-sectional shape characterized by a linear portion of the channel floor located so as to interconnect with the settlement flat margin of said loudspeaker basket, substantially extending to the inner wall of said basket suspension link flange, the floor covering of the channel being adhesively attached to the flat margin settlement of said basket and thus formed in said channel a floor covering made and configured to interconnect and support an end region of the basket connecting skirt of said peripheral suspension member. The peripheral loudspeaker cone support system according to claim 8, further comprising: a peripheral joining liner made contiguous with the floor covering of the channel and configured to interconnect between the flat margin seating of said basket and the outer wall of the basket connecting skirt of said peripheral suspension member. The peripheral loudspeaker cone support system according to claim 2, wherein the cross-sectional shape of the basket connecting skirt is characterized by a first portion thereof extending from the outer suspension point to the seating of the flat margin of the basket, at that point, bending backwardly outwardly on itself and extending substantially backward to the outer suspension point while interconnecting the inner wall of said suspension link flange of the basket, being attached thereto adhesively, thus forming an outer joining flange of two layers. The peripheral loudspeaker cone support system according to claim 2, wherein said joining means further comprises: a loudspeaker mounting adapter, for mounting to a rear side of a panel, having an L-shaped shape in cross section characterized by an axial portion interconnected and attached to the surface of the interior wall of said suspension joint flange and extending substantially beyond the frontal plane to a corner joint with a radial portion extending inwardly toward the central axis for thus forming a panel mounting flange; the basket connecting skirt of said peripheral suspension member being made and configured to have a peripheral outer wall surface configured and sized to closely fit within the inner wall of the axial portion of said loudspeaker mounting adapter, the adhesive material being applied in the assembly to a maximum available area so as to permanently attach the surface of the outer wall of the skirt of the basket joint to said member, of peripheral suspension to the inner wall of the axial portion of said loudspeaker mounting adapter. 12. The loudspeaker cone peripheral support system according to claim 11, further comprising: the connecting skirt of said peripheral suspension member further being configured with an end flange extending radially outward toward the inner wall of said flange of suspension joint thus forming a floor covering disposed between a rear edge of said loudspeaker mounting adapter and the seating of piano margin of the basket.