CN111294707A

CN111294707A - Loudspeaker

Info

Publication number: CN111294707A
Application number: CN201811493035.8A
Authority: CN
Inventors: 温泓; 曾纪辉; 牛源蓁; 朱贞金
Original assignee: Harman International Industries Inc
Current assignee: Harman International Industries Ltd; Harman International Industries Inc
Priority date: 2018-12-07
Filing date: 2018-12-07
Publication date: 2020-06-16

Abstract

The present disclosure provides a speaker, including: a support structure comprising a cradle; the vibration structure comprises a folded ring, and the folded ring comprises an arc-shaped part and an outer edge connected with the support; wherein the outer edge of the edge extends downward, abuts and is connected to the outer edge of the top of the bracket, and the outer edge of the edge does not exceed the radially outermost end of the arc-shaped portion in the radial direction. The above structure increases the effective vibration area of the speaker, thereby improving the sensitivity of the speaker.

Description

Loudspeaker

Technical Field

The present disclosure relates to a speaker, and more particularly, to a speaker having an improved corrugated rim structure.

Background

At present, with the popularization rate of traditional sound boxes and intelligent sound boxes on the market being higher and higher, the requirement of consumers on the sound quality is higher and higher. The loudspeaker is used as a core component in a sound box, and the specific design requirements of the loudspeaker can comprise one or more of the following aspects: (1) the loudspeaker can bear high power; (2) the loudspeaker has a lower resonant frequency; (3) the loudspeaker has extremely high sensitivity; (4) the loudspeaker size is as small as possible; (5) the loudspeaker has a low distortion.

The effective vibration area of a speaker is an important factor affecting the sensitivity of the speaker. On the one hand, the market demands thinner and smaller loudspeakers, and on the other hand the reduction in the volume of the loudspeakers may lead to a reduction in the effective vibration area, which may lead to a reduction in the sensitivity of the loudspeakers.

Therefore, it is desirable to provide a speaker having as large an effective vibration area as possible under a certain outer diameter size limitation.

Disclosure of Invention

The present disclosure provides a speaker having an effective vibration area as large as possible.

According to an embodiment of the present disclosure, there is provided a loudspeaker comprising a support structure comprising a support; the vibration structure comprises a folded ring, and the folded ring comprises an arc-shaped part and an outer edge connected with the support; wherein the outer edge of the edge extends downward, abuts and is connected to the outer edge of the top of the bracket, and the outer edge of the edge does not exceed the radially outermost end of the arc-shaped portion in the radial direction.

Optionally, the outer edge of the edge is vertically downwardly extending and the outer edge of the top of the stand has a surface cooperating therewith. Optionally, the lower edge of the outer edge of the top does not exceed the lower edge of the outer edge of the top of the support, and the support comprises a horizontal rim extending radially outwardly below the outer edge of the top.

Optionally, the curved portion of the edge is symmetrical with respect to an axis extending from the highest point of the curved portion in a vertical direction of the speaker.

Optionally, the arc portion of the grommet is asymmetric with respect to an axis extending from a highest point of the arc portion in a vertical direction of the speaker, and the highest point is offset radially outward or radially inward with respect to a midpoint of a width of the arc portion.

Optionally, the highest point of the edge constitutes a wave shape in the horizontal direction of the loudspeaker.

Optionally, the outer edge of the edge is attached to the bracket by gluing or snapping.

Optionally, the vibrating structure further comprises an elastic wave, and an outer edge of the elastic wave is connected with the support in the vertical direction.

Optionally, the bellows is made of one or more of rubber, polyurethane, and foam.

Optionally, the speaker is an axisymmetric speaker or a non-axisymmetric speaker. Alternatively, the speaker may be a racetrack speaker or a square speaker.

Optionally, the loudspeaker comprises a magnetic circuit system comprising a magnetic gap; the vibrating structure further comprises an elastic wave and a voice coil connected with the elastic wave, and the voice coil can be suspended in the magnetic gap.

Alternatively, the loudspeaker may be a passive radiator.

Drawings

Fig. 1 shows a cross-sectional view of a loudspeaker according to an embodiment of the present disclosure;

FIG. 2 is an exploded view of the speaker shown in FIG. 1;

fig. 3A shows a top view of a speaker according to an embodiment of the present disclosure;

FIG. 3B is a cross-sectional A-A view of the speaker shown in FIG. 3A;

FIG. 3C is an enlarged view of the attachment of the edge to the bracket of FIG. 3B;

4A-4C are schematic illustrations of a different form of corrugated edge according to an embodiment of the present disclosure, and FIG. 4D is a top view and A-A cross-sectional view of a wavy edge using a different form of edge as in FIGS. 4A-4C;

FIG. 5 shows a schematic diagram of an effective vibration radius of a loudspeaker according to the present disclosure; and

fig. 6 is a graph showing a comparison of sound pressure level curves obtained by using the horizontal connection and the vertical connection in the case where the maximum outer diameters of the speakers are the same.

Detailed Description

Reference will now be made in detail to embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are exemplary only for the purpose of illustrating the present disclosure and should not be construed as limiting the same.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. In the description of the present disclosure, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present disclosure and simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be considered as limiting the present disclosure.

Fig. 1-2 illustrate a speaker 100 according to an embodiment of the present disclosure, where fig. 1 is a cross-sectional view and fig. 2 is an exploded view. Fig. 3A shows a top view of a speaker according to an embodiment of the present disclosure; FIG. 3B is a cross-sectional view of section A-A of the speaker shown in FIG. 3A; fig. 3C is an enlarged view of the connection portion of the edge and the bracket in fig. 3B.

The loudspeaker 100 comprises a vibrating structure, a magnetic circuit system and a support structure. The vibrating structure may include a corrugated rim 120, a voice coil 122, a dust cover 124, a damper 126, and a diaphragm 128. The magnetic circuit system may include a primary magnet 160, a secondary magnet 162, an upper pole piece 164, and a lower pole piece 166. The support structure may include a bracket 140. The bracket 140 is used to accommodate the vibrating structure and the magnetic circuit system. The speaker of the present disclosure is not so limited and may have more or fewer components.

In the vibrating configuration, the radially outer edge of the flexure 120 is connected to the bracket 140 and the radially inner edge thereof is connected to the diaphragm 128. The radially outer edge of damper 126 is connected to spider 140 and the radially inner edge thereof is connected to voice coil 122. After an electrical signal (sound signal) enters the voice coil, the voice coil can vibrate in the axial direction of the loudspeaker in the magnetic gap, and the vibration of the voice coil drives the diaphragm to vibrate. The manner of connection between the edge 120 and the bracket 140 will be described in more detail below.

As shown in fig. 1, 3B and 3C, the corrugated rim 120 includes an outer edge 210, an arcuate portion 230 and an inner edge 250. The outer edge 210 of the edge 120 is located at the radially outermost side of the edge 120 and extends downwards (here "up" and "down" are determined with respect to the direction of placement of the loudspeaker in the figure, i.e. the edge of the edge and diaphragm of the loudspeaker are located in the upper part of the loudspeaker and the magnetic circuit of the loudspeaker is located in the lower part of the loudspeaker), abutting the outer edge 310 of the top of the frame. Fig. 1, 3B and 3C only show the case where the outer edge 210 of the corrugated rim extends downward in the vertical direction. However, the outer edge 210 of the edge 120 is not limited to a structure extending downward in the vertical direction of the speaker (i.e., the axial direction of the speaker), and may include a structure extending obliquely downward. However, the outer edge 210 of the edge does not extend radially beyond the radially outermost end of the arcuate portion 230 of the edge 120, e.g., the outer edge 210 of the edge is inclined inwardly with respect to the radially outermost end of the arcuate portion 230 of the edge 120.

The outer edge 210 of the downwardly extending edge 210 may be formed in a vertically downward or obliquely downward configuration during manufacture.

To connect with outer edge 210 of knuckle 120, outer edge 310 of the top of brace 140 may be shaped to match the radially downward extending angle of outer edge 210 of knuckle 120 to maintain the abutment of outer edge 210 of knuckle 120 with outer edge 310 of brace 140. For example, where the outer edge 210 of the knuckle 120 is oriented generally vertically downward, the outer edge 310 of the bracket is correspondingly generally vertically contoured; when the outer edge 310 of the edge 120 is oriented obliquely downward, the outer edge 310 of the bracket is also shaped obliquely downward at substantially the same angle.

Outer edge 210 of edge 120 and outer edge 310 of brace 140 may be adhesively secured together. The adhesive 50 is located between the two opposing portions. In order to ensure the strength of the bond between the two, the portion of the edge 210 of the edge 120 opposite the edge 310 of the frame is large enough. The length of the outer edge 210 of the corrugated rim 120 may be selected according to the size of the speaker. The edge and the bracket 140 may be connected by other means, such as a snap connection. Additionally, to increase the strength of the connection, the outer edge 210 of the edge may have a greater thickness than the rest of the edge.

The bellows can be made from a variety of suitable materials as desired, including but not limited to rubber, Polyurethane (PU), foam, cloth-based materials, paper-based materials, and the like.

The connection mode of the folding ring and the bracket can also be applied to the connection of the elastic wave and the bracket. For example, the outer edge of the damper extends downward or upward vertically or obliquely, and is connected to the corresponding portion of the bracket by bonding or the like.

The top of the holder 140 may further include a radial edge 330 (shown in fig. 3C) extending radially outward below the outer edge 310 of the top of the holder. The length of the outer edge 210 of the edge 120 does not exceed the lower edge of the outer edge 310 of the stent so that the radial edge 330 may extend radially below the lower edge of the outer edge 210 of the edge 120. The radial edge 330 of the bracket 140 may be used to provide an opening for securing a speaker (as shown in fig. 3A). In order to minimize the size of the loudspeaker, the maximum width of the bracket may be limited to not exceed the diameter D of the edge. Optionally, the support structure may further include a terminal 142 disposed on a side of the bracket 140 radially inward of the radially outer edge of the edge. The terminal 142 is connected to a lead-out wire of the voice coil for electrical connection of the voice coil to the outside of the speaker.

The present disclosure is not limited to the structure of the cradle shown in the figures, but the cradle may also be a box or other structure suitable for receiving and supporting a vibrating structure.

Optionally, the bracket is further connected with the magnetic circuit system. In the magnetic circuit system, the main magnet 160, the upper pole piece 164, and the sub-magnet 162 are sequentially disposed above the lower pole piece 166 and supported by the lower pole piece 166. They can be connected together by means of adhesion or the like. The magnetic circuit system may also include a copper cap (not shown) disposed on the upper pole piece 164 for reducing induced eddy currents and thereby reducing distortion. The magnetic circuit system in the above embodiments is merely exemplary, and the present disclosure is not limited to the magnetic circuit system, but may be applied to various magnetic circuit systems.

The effective vibration area of the speaker is related to the distance of the highest point of the arc-shaped portion of the corrugated rim from the vertical axis of the speaker. In the above embodiments of the present disclosure, the connection position between the edge and the support is disposed below the arc portion of the edge, so that the connection portion of the edge does not occupy the width of the speaker, the outer diameter of the speaker is utilized to the maximum extent, the effective vibration area of the speaker is increased as much as possible, and the sensitivity of the speaker is improved as much as possible.

As shown in fig. 5, taking a circular corrugated rim as an example, the effective vibration area S is calculated by taking the distance between the highest point of the arc-shaped portion of the corrugated rim and the axis of the speaker as the effective vibration radius a. In the case where the entire width D of the speaker is limited, the distance a from the highest point of the arc-shaped portion of the edge to the axis of the speaker can be increased as much as possible, thereby maximizing the effective vibration area S.

For other shapes of the corrugated rim, the effective vibration area is calculated in a different manner, but is related to the distance of the highest point of the corrugated rim from the vertical axis of the loudspeaker.

In addition to the structure in which the connection position between the edge and the support is disposed below the arc portion of the edge, it is also possible to consider using edge of different shapes to increase the effective vibration area and improve the sensitivity of the speaker.

Fig. 4A-4C show schematic views of different forms of folds, and fig. 4D is a top view and a-a cross-sectional view of a wavy fold using different forms of folds as shown in fig. 4A-4C, according to an embodiment of the present disclosure.

In fig. 4A, the arc portion of the edge is symmetrical with respect to an axis extending from the highest point of the arc portion in the vertical direction of the speaker. In fig. 4B and 4C, the arc portion of the edge is asymmetrical with respect to an axis extending from the highest point of the arc portion in the vertical direction of the speaker, and the highest point is offset radially outward (fig. 4B) or radially inward (fig. 4C) with respect to the midpoint of the width of the arc portion.

The effective vibration area of the circular corrugated rim formed using the shape in fig. 4B will be larger than that of the circular corrugated rim formed using the shapes of fig. 4A and 4C.

Fig. 4D is a wavy edge formed using the edge shape of fig. 4A, 4B and 4C, wherein the highest point of the edge forms a wavy shape (see 401). As can be seen from the sectional view a-a in fig. 4D, the highest point of the arc portion corresponding to the peak portion of the wave shape is shifted outward, which corresponds to the case of fig. 4B; while the highest point of the arc corresponding to the wave-shaped trough part is shifted inwards, which corresponds to the situation in fig. 4C. One of the main functions of the corrugated rim is to ensure that the diaphragm moves along the axial direction without eccentricity, thereby avoiding the voice coil from being rubbed in the magnetic gap. The corrugated rim formed in this way can better limit the radial movement of the diaphragm relative to the circular corrugated rim formed in a symmetrical manner, preventing deformation of the corrugated rim, and thus improving the sensitivity of the loudspeaker. Further, the edge is not limited to the above shape, and other shapes of symmetric or asymmetric edges may be used. In addition, reinforcing ribs or patterns can be arranged on the folding rings to enhance the rigidity of the folding rings and avoid polarization.

Fig. 6 shows a graph of sound pressure levels measured between the edge and the frame using a horizontal connection and a vertical connection, respectively, for a 66mm speaker example, where the results for the horizontal connection are shown in dashed lines and the results for the vertical connection are shown in solid lines. The horizontal connection mode of the edge and the bracket needs to reserve a certain size at the outer edge of the edge for the stable connection with the bracket. However, the size occupied by the connection reduces the effective radius of the corrugated rim vibration, thereby reducing the effective vibration area, thereby reducing the sensitivity of the speaker unit. From the above comparison results, it can be seen that the sound pressure level obtained by the embodiment of the present disclosure is 2-3dB higher than that obtained by the horizontal connection manner with the same maximum outer diameter.

Although the embodiment of the present disclosure is illustrated with an active speaker, the connection between the corrugated rim and the bracket can also be applied to a passive radiator or the like. Alternatively, the passive radiator may be used with an active speaker, mounted on the cabinet of the enclosure. The support of the passive radiator may be the support used for the active loudspeaker as in the previous embodiments, or may be the cabinet of the loudspeaker box. In addition, the connection mode disclosed by the invention can be used for various occasions needing suspension and fixation.

Although the embodiments of the present disclosure relate to the speaker of the axisymmetrical structure, the present disclosure is not limited thereto, but may be applied to other various speakers such as a speaker of a non-axisymmetrical structure, for example, a racetrack type speaker, a square speaker, and the like.

The foregoing is considered as illustrative of exemplary embodiments, which have been used to illustrate the principles of the disclosure, and not to limit the scope of the disclosure. It will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the disclosure, and these changes and modifications are also within the scope of the disclosure.

Claims

1. A loudspeaker, comprising:

a support structure comprising a cradle;

the vibration structure comprises a folded ring, and the folded ring comprises an arc-shaped part and an outer edge connected with the support;

wherein the outer edge of the edge extends downward, abuts and is connected to the outer edge of the top of the bracket, and the outer edge of the edge does not exceed the radially outermost end of the arc-shaped portion in the radial direction.

2. The loudspeaker of claim 1, wherein:

the outer edge of the edge is vertically downwardly extending and the outer edge of the top of the bracket has a surface that mates therewith.

3. A loudspeaker according to claim 1 or 2, wherein: the lower edge of the outer edge of the edge does not exceed the lower edge of the outer edge of the top of the bracket, and the bracket includes a horizontal edge extending radially outward below the outer edge of the top.

4. A loudspeaker according to claim 1 or 2, wherein:

the arc portion of the edge is symmetrical with respect to an axis extending from the highest point of the arc portion in the vertical direction of the speaker.

5. A loudspeaker according to claim 1 or 2, wherein:

the arc portion of the corrugated rim is asymmetrical with respect to an axis extending from a highest point of the arc portion in a vertical direction of the speaker, and the highest point is offset radially outward or radially inward with respect to a midpoint of a width of the arc portion.

6. A loudspeaker according to claim 1 or 2, wherein:

the highest point of the corrugated ring forms a wave shape in the horizontal direction of the loudspeaker.

7. A loudspeaker according to claim 1 or 2, wherein:

the outer edge of the corrugated rim is connected to the bracket by bonding or snapping.

8. A loudspeaker according to claim 1 or 2, wherein:

the vibration structure further comprises an elastic wave, and the outer edge of the elastic wave is connected with the support in the vertical direction.

9. A loudspeaker according to claim 1 or 2, wherein:

the corrugated rim is made of one or more of rubber, polyurethane and foam.

10. A loudspeaker according to claim 1 or 2, wherein:

the loudspeaker is an axisymmetric loudspeaker or a non-axisymmetric loudspeaker.

11. A loudspeaker according to claim 1 or 2, wherein:

the speakers are racetrack speakers or square speakers.

12. The speaker according to claim 1 or 2, characterized by further comprising:

a magnetic circuit system including a magnetic gap;

the vibrating structure further comprises an elastic wave and a voice coil connected with the elastic wave, and the voice coil can be suspended in the magnetic gap.

13. A loudspeaker according to claim 1 or 2, wherein:

the loudspeaker is a passive radiator.