KR20030066822A - Speaker surround structure for maximizing cone diameter - Google Patents

Abstract

The outer basket-attachment of the surround-suspension 12 allows the placement of diaphragms 14 of a larger diameter than those commonly used in the corresponding basket 10 size in compact speakers. Instead of the planar shape, in the case of the axial skirt 16a, i. The speaker basket 10 of the present invention has a corresponding axial peripheral flange (inner wall responsible for the landing 20 for adhesively attaching to the outer wall of the axial surround suspension flange). This particular configuration significantly improves the effective vibration piston area by employing larger cones while maintaining the required elasticity and full deflection. The basket may be stamped with metal as in conventional speakers, or in other embodiments may be cast from metal or molded from a suitable plastic material. The outer attachment member of the surround-suspension consists of a special cross-sectional shape for maximizing the area available for adhesively attaching to the basket.

Description

Speaker surround structure maximizes cone diameter {SPEAKER SURROUND STRUCTURE FOR MAXIMIZING CONE DIAMETER}

Compact speakers are categorized by external dimensions, such as the diameter of a round speaker, while the main performance limitations, such as midrange and low range performance, are mainly diaphragm range and excursion performance, ie diaphragms acting as pistons. It is mainly determined by the volume of air that is moved by the effective moving part of.

Many of the smaller speakers are used in vehicles such as cars, trucks, boats and aircraft. These speakers are generally designed to be mechanically suitable for the specific mounting pattern used by the vehicle manufacturer, and typically include a main cutout and surround mounting holes, which are in accordance with various standards around the world. The dimension is determined.

Round speakers with basket diameters ranging from 4 inches to 7 inches are used in vehicles in the United States and around the world in very large quantities. Most speakers ranging from 6 inches to 7 inches are either Japanese Industrial Standards (JIS, hereinafter referred to as "JIS") that define 6.18 inches (157 mm) diameter, or German Industrial Standards (DIN, Hereinafter referred to as 'DIN'-used in Europe. A useful factor of merit regarding the efficiency of the size is obtained by comparing the cone area with the projecting entire basket area. These ratio elements are tabulated below along with representative basket diameters and associated cone diameters.

(Main dimensions of popular compact speakers) Nominal size standard Cone diameter (mm) Basket diameter (mm) Cone Territory / Basket Area 4 inch 73 102.3 0.51 5 1/4 inch 92 129 0.51 6 1/2 inch JIS Japan (a) 111.8 157 0.51 JIS Japan (b) 115.3 157 0.54 DIN Europe 119.3 170 0.49

Table 1 shows that conventional speaker structures typically provide a cone / basket ratio of 0.51. The JIS standard (b) standard represents an effort to maintain a smaller JIS basket size while partially upgrading to the cone size of DIN and the corresponding midrange and low pass performance.

Since all practical loudspeakers suffer an inherent dropout of acoustic efficiency at a low-end cutoff frequency that is inversely proportional to the cone area (for a given cone deviation). It is clear that increasing the cone diameter is also very beneficial in this case, since the cone diameter growth rate results in a cone area growth rate greater than twice. Regardless of whether the speaker basket is round, oval, or other shape, achieving an increase in cone area without increasing its external dimensions is subject to strict limitations on basket size—such as automotive acoustic systems and small personal radio / stereo players, multimedia computers. It will be especially helpful for midrange and low-end performance of vulnerable compact speakers, if they are used in large quantities in systems and the like.

(Discussion of related prior art)

1 is a cross-sectional view of an edge portion of a molded metal sheet basket 10 of a loudspeaker conventional in the prior art. A typical surround-suspension 12 has a radially flat outer flange 12a at its outer peripheral portion to adhesively attach to a planar margin landing 10a at the periphery of the basket. A conical inner flange 12b around the inner extension perimeter and is adhesively attached to the cone 14 (some shown). The central arcuate flexible portion 12c of the annular surround-suspension member 12 restrains the cone 14 in the radial direction, but allows it to oscillate axially when driven by the voice coil.

The positions of the cones 14 and the surround-suspension 12 are shown in solid lines in the case of a normal "stopped" state. The displacement positions of the surround suspension 12 'and the cone 14' are shown in dashed lines at the maximum downward cone excursion in the case of maximum drive. The arch 12c displacement of the surround-suspension extends to the middle region of the arch 12c to provide an effective piston diameter that is somewhat larger than the cone diameter.

FIG. 1A shows a cross section of the basket 10a, which is molded from plastic or cast from a metal such as aluminum as an alternative to the pressing metal sheet configuration, as shown in FIG. Adhesively attaches the outer flange 12a of the surround-suspension 12 so as to form an equivalent of the landing of the metal thin basket.

U.S. Pat.Nos. 5,111,510 (patent Mitobe) and 5,115,474 (patent Tsuchiya et al.) Show cross-sectional views showing conventional conventional speaker surround-suspension structures. Their standard cone mounting configuration is characterized by having radially planar fixing flanges extending outwards on the surround-suspension as shown in Figs. 1 and 1A, which is global in an absolute number of prior art speakers. It is the same as being carried out.

U.S. Patent 5,867,583 "TWIST-LOCK MOUNTABLE VERSATILE LOUDSPEAKER MOUNT" (inventor Hazelwood, Espiritu, Jorgensen) discloses a non-conventional mounting system that includes a special surround-suspension configuration, the special surround-suspension configuration This results in an increase in the basket diameter ratio, for example by enabling the use of DIN cones in JIS baskets, resulting in a cone / basket area ratio of 0.58, which is 13% more than conventional speakers (typically 0.51, see Table 1). Is an increase in excess.

(Purpose of invention)

It is a primary object of the present invention to provide non-conventional mounting of round cone loudspeakers, which allows greater cone size to be used than conventionally, increasing the cone / basket diameter, thereby increasing midrange and low pass performance.

It is another object of the present invention to allow the surround-suspension to occupy less space in the external fixed area, allowing for larger cone diameters and providing at least the same capacity as the cone deflection capability found in conventional equivalent speakers. -To provide a new configuration and mounting system in which the suspension is configured.

It is a further object of the present invention to provide an embodiment using a molded metal sheet standard speaker basket, as well as a basket molded from plastic or cast from a metal, such as aluminum.

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

FIELD OF THE INVENTION The present invention relates to audio loudspeakers / transducers, and more particularly to improving the midrange and low frequency response of popular compact category full range speakers.

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

1-9 are cross-sectional views of the rim region of the speaker

1 and 1A are views of a conventional conventional speaker as discussed in the prior art.

2-9 illustrate an embodiment and variant of a speaker cone suspension system constructed in accordance with the present invention.

FIG. 2 shows a surround-suspension specially shaped to have an outer skirt, the outer surface of which is adhesively attached, bordering the inner surface of the flange at the basket rim; FIG.

FIG. 3 illustrates a surround attachment similar to that of FIG. 2 wherein the skirt fits into an annular channel formed in a specially molded or cast basket.

4 shows a surround attachment similar to that of FIG. 2 with the annular retainer ring added; FIG.

FIG. 5 shows a variant of the general configuration of FIG. 4 in which the retainer ring is shaped to have an annular mounting channel. FIG.

FIG. 6 is an illustration of a preferred embodiment in which the surround is specially shaped such that it has a cross section expanded in the mounting area.

7 is an illustration of an alternative embodiment with a doubled-backed flange in the mounting area.

FIG. 8 is a variation of the embodiment shown in FIG. 6, in which the interface area is increased to improve adhesive fixation.

FIG. 9 is a view of an embodiment in which an annular spacer is arranged that enables the speaker to be mounted on the rear side of the panel. FIG.

The above-mentioned objectives are achieved by using diaphragms of larger diameter than those conventionally used for the basket size, and by placing the outer periphery of the surround suspension in a special configuration (place cones of larger diameter, and / or surround-suspension). It is achieved by the subject speaker of the present invention by increasing the thickness of the soluble arch of the present invention, thereby increasing the effective vibration area while retaining the necessary elasticity and full shifting capability.

In a new development of the invention the surround-suspension outer attachment member is made in the form of an axial skirt instead of a conventional planar shape which extends radially outward from the soluble arch, ie in the case of a round speaker, generally tubular, Is dimensioned so as to fit tightly by adhesively securing the interface region inside a corresponding axial flange (provided around the basket and extending forward).

The axial skirt can be specially shaped to maximize the adhesive fixation area.

In the case of various embodiments and variations, the basket may be in the form of a metal stamp, similar to conventional JIS speech, or in the form of a metal or molded of a suitable plastic material.

1 to 9 show cross sections of the basket rim area of the speaker, respectively.

1 and 1A illustrate a surround-suspension mounting and attachment configuration for conventional conventional speakers using molded metal sheets or mold / cast baskets, respectively, as discussed in the prior art.

2-9 illustrate various embodiments of a novel cone surround-suspension mount constructed in accordance with the present invention.

2 shows a basic embodiment of the present invention. The specially constructed surround-suspension 16 is manufactured such that the outer attachment member is formed as an axial skirt 16a extending forward, and with an outwardly extending axial planar flange of the prior art shown in FIGS. Basic development has been made from the conventional practice of attaching through 12a).

The skirt 16a faces the inner surface of the basket rim and its lower edge is located in the landing area. The skirt 16a is adhesively attached to the interface as shown. The basic embodiment can be used with a press metal flake basket 10 as shown, or with a basket molded from plastic or cast from a metal such as aluminum.

The increased size of the cone 14a, ie increased diameter in the case of round speakers, made possible by the present invention is evident in FIG. 2 when compared to the conventional cone 14 of FIGS. 1 and 1A.

FIG. 3 illustrates an embodiment using a surround-suspension 16 specially shaped as in FIG. 2. However, the skirt 16a fits into the annular channel, and the outer wall of the annular channel is formed by the thickened region 18a (molded with plastic or cast from a metal such as aluminum) of the basket 18. This configuration is excellent in attachment reliability because the adhesion area increases at the interface between the inner wall surface of the peripheral flange of the basket 18 and the outer wall skirt 16a of the surround-suspension 16.

FIG. 4 illustrates a variation on the basic implementation of FIG. 2, wherein the surround-suspension 16 is identical to FIGS. 2 and 3, but internally by an annular retainer ring 20 shaped as shown. And is adhesively fixed to the landing of the basket 10. The attachment skirt 16a of the suspension member 16 is fixedly adhesively fixed to the rim of the basket 10 and the interface with the rim 20.

FIG. 5 illustrates a variation on the generic embodiment of FIG. 4, wherein the retainer ring 22 consists of an annular channel that receives the attachment skirt 16a of the suspension member 16. The thickness of the channel outer wall of the ring 22 should be taken into account in determining the basket size, cone size and / or span of the flexible arch of the suspension member 16.

FIG. 6 illustrates a preferred embodiment of the present invention wherein the surround-suspension 24 is specially shaped to have a cross-sectional shape that is enlarged in the mounting landing area as shown. This allows both axial and radial interface regions to be adhesively fixed, resulting in high reliability by increasing the fixing area as compared to the conventional fixing of FIGS. 1 and 1A.

FIG. 7 shows an alternative embodiment, wherein the outer mounting skirt 26a of the surround-suspension 26 is double backed as shown and adhesively secured to the peripheral flange inner and planar edge landings of the basket 10. It is.

FIG. 8 shows an embodiment similar to FIG. 6, in which the mounting skirt 28a of the special surround-suspension 28 shows an enlarged additional area of adhesive fixation (the entire area of the flat edge landing 20 of the basket 10). Molded to form an enlarged depiction shape to a thickness that allows substantially inclusion).

FIG. 9 shows an embodiment of the invention, further comprising a mounting adapter 32 fitted within an axial peripheral flange of the basket 10, wherein the mounting adapter 32 is mounted with a speaker on the rear side of the panel. To be possible.

The skirt of the surround-suspension member 30 is made such that the narrow fixing flange 30a extends outward from the edge of the skirt and is adhesively fixed to the edge landing of the basket 10 and to the bottom of the annular speaker mount adapter 32, The annular speaker mount adapter 32 is molded from plastic or molded / cast from metal. The adapter 32 forms a spacer between the speaker and the panel facing the upper horizontal plane of the adapter 32. The bottom of the vertical portion of the adapter 32 acting downward on the narrow anchoring flange 30a is adhesively anchored to the inner surface of the basket 10 rim, providing an additional interface area to improve adhesive anchoring.

Combining most embodiments of the present invention into a 4 inch round speaker with a conventional basket having an outer diameter of 129 mm will allow the conventional cone diameter (92 mm) to be increased to 102.6 mm, An increase of 11.5% and area 24.4%, resulting in a significant improvement in the low frequency response. In relation to Table 1, the cone area / basket area ratio achieved by the present invention in the 4 inch category is 0.633, an increase of 24% in the advantage factor of the cone area / basket area ratio compared to 0.51 of conventional speakers.

In any of the embodiments, the arch portion of the surround-suspension may have a special thickness change, or may specifically change the head to increase suitability, ie the central area is thinned and / or tapered on both sides or one flange. tapering).

The invention can be embodied in an alternative arrangement in which the surround-suspension skirt flange is arranged outside of the basket rim flange as shown, so that the inner axial wall of the suspension attachment skirt is the outer axial direction of the basket rim flange. It will face the wall and be adhesively attached to it.

Typically, in various embodiments disclosed, the specially configured surround-suspension of the present invention functions in cooperation with a conventional second cone suspension member (usually a concentric spider suspension attached in a known manner to the central voice coil region of the cone). . However, the invention may also be practiced in embodiments in which a special surround-suspension functions as a sole cone suspension component.

Although described herein as being applied to round basket speakers for illustrative purposes, the principles of the present invention, i.e. shortening or eliminating the mounting flanges extending outward of the surround-suspension, are not limited to round speakers, and may be elliptical or It can be done in speakers with baskets of any practical shape, including right angles.

The invention can be embodied or implemented in other specific forms without departing from the spirit and basic features of the invention. Accordingly, the present embodiments are to be considered in all respects as illustrative and not restrictive. The scope of the spring invention is indicated by the following claims rather than by the foregoing description. All modifications, substitutions and changes that fall within the scope of equivalents of the claims shall be included within the scope of the present invention.

Claims (12)

In a compact full-range loudspeaker with a basket that constitutes the main speaker frame, whose outer boundary surrounds the designated basket area at the front surface perpendicular to the central axis of the main speaker, the effective piston area of the diverter cone constituting the acoustic diaphragm is Maximizing speaker cone-surround support system A surround-suspension that surrounds the cone and supports the cone in a manner that allows vibration of the cone for acoustic purposes, the cross-sectional shape being viewed from the radial axis of the speaker (a) the cone for acoustic purposes A main flexible portion that is arranged and configured to allow a functional vibration of and extends between the inner and outer suspension positions substantially positioned at the front face; (b) a cone-attaching flange extending from said inner suspension position and adhesively attached to and overlapping a peripheral suspension-attaching edge of said cone; (c) a surround-suspension extending rearward from the outer suspension position and forming an axial basket-attached skirt formed to overlap and border the entire peripheral area of the basket; Attachment means for securing the basket-attached skirt of the surround-suspension to the peripheral region of the basket, The cone has a conventional flat radial basket-attach flange, at the inner suspension position on the front face with respect to a given basket area and a given full dimension of the main flexible portion of the surround-suspension measured between the inner and outer suspension positions. Is configured to have a substantially larger area than conventional comparable speakers having a cone-suspension configured to The surround-suspension having an outer profile surrounding the area of the front face corresponding to at least 95% of the basket area; Speaker cone-surround support system. The method of claim 1 wherein said attachment means is A suspension-attach flange of substantially uniform thickness, constructed as part of the basket, extending axially from an outer end of a flat edge landing area radially disposed around the edge of the basket and forward toward the front face. And a suspension-attach flange having a predetermined shape and size to overlap and insert the basket-attach skirt of the surround-suspension. 3. The surround-suspension basket-attached skirt of claim 2, wherein the basket-attached skirt of the surround-suspension is configured to have a peripheral outer wall shaped and sized to fit snugly into an inner wall of the suspension-attached flange of the basket, wherein an adhesive material is used to surround the surround. The speaker cone-surround support system applied to the assembly in such a manner that the outer wall of the basket-attached skirt of the suspension member is permanently attached to the inner wall of the suspension-attached flange of the basket. 4. The molding of claim 3 wherein the basket-attached skirt of the surround-suspension member forms a cross-sectional shape that extends to an increased edge thickness that forms a flat basket-attached surface that is substantially perpendicular to the outer surface of the basket-attached skirt. Formed in a process, disposed and configured to face the planar edge landing of the speaker basket, the surround-attach flange is provided adjacent and extends radially inward from the surround-attach flange, wherein the adhesive material is the suspension- A speaker cone-surround support system applied between a flat basket-attachment surface of an attachment flange and a flat edge landing of the speaker basket to substantially increase the overall interface area bonded by the adhesive material. The method of claim 3, wherein the attachment means A substantially uniform width peripheral channel formed around the speaker basket, the channel being opposed to a first wall surface defined by an inner wall of a suspension-attaching flange of the basket and spaced at a substantially uniform width from the first wall surface. A second wall surface to securely fit the basket-attached skirt of the cone surround suspension, which is inserted and held in conformity with the channel, and is further fixed in place by adhesive material applied to all interfaces during initial assembly A speaker cone-surround system comprising peripheral channels. The method of claim 5, An assembly area for forming a wall surface separated by a uniform distance from an inner surface of said suspension-attaching flange to provide a second wall surface of said channel, The speaker basket comprising the suspension-attach flange is formed from a plastic material in a molding process. The method of claim 5, A wall member attached to the planar edge landing of the basket, the wall member providing a second wall surface of the channel separated by a uniform distance from the inner surface of the suspension-attaching flange, And the speaker basket comprising the suspension-attach flange is formed from metal flakes in a stamping process. The method of claim 7, wherein The molding member is also formed to have a cross-sectional shape positioned to face the planar edge landing of the speaker basket and substantially extending to the inner wall of the suspension-attaching flange of the basket, wherein the channel bottom is formed. And a liner is adhesively attached to the planar edge landing of the basket to form a bottom lining in the channel disposed and configured to face and support the distal region of the basket-attached skirt of the surround-suspension member. The method of claim 8, And a peripheral attachment liner configured to abut the channel bottom liner and disposed to face between the planar edge landing of the basket and an outer wall of the basket-attached skirt of the surround-suspension member. The method of claim 2, The cross-sectional shape of the basket-attached skirt is such that the first portion of the basket-attached skirt extends from the outer suspension position to a planar edge landing of the basket and faces the inner wall of the basket's suspension-attached flange, the plane of the basket being attached. A speaker cone-surround system that is folded outward over itself in an edge landing position and substantially re-extended to the outer suspension position, adhesively attached to an inner wall of the suspension-attach flange to form a double layer outer attachment flange. The method of claim 2, wherein the attachment means A speaker mount adapter for mounting on the rear side of a panel, the speaker mounting adapter having an L-shaped cross section, the axial portion of which faces an inner wall of the suspension-mounting flange and is attached to the inner wall, and substantially beyond the front, a central axis Further comprising a speaker mount adapter extending to a corner junction with a radially extending portion inwardly to form a panel-mounting flange, The basket-attached skirt of the surround-suspension member is arranged and configured to have a peripheral outer wall of a shape and size that can fit snugly into the inner wall of the axial portion of the speaker mount adapter, the adhesive material having a maximum useful area when assembled. A speaker cone-surround system applied to the outer wall of the basket-attached skirt of the surround-suspension member permanently to the inner wall of the axial portion of the speaker mount adapter. The method of claim 11, The basket-attached skirt of the surround-suspension member is also formed to have a distal flange extending radially outwardly to the inner wall of the suspension-attached flange, such that between the rear edge of the speaker mount adapter and the flat edge landing of the basket. And a speaker liner surround system to form a bottom liner disposed therein.