WO2018006535A1

WO2018006535A1 - Passive radiator and speaker

Info

Publication number: WO2018006535A1
Application number: PCT/CN2016/106893
Authority: WO
Inventors: 张文东
Original assignee: 北京爱德发科技有限公司
Priority date: 2016-07-06
Filing date: 2016-11-23
Publication date: 2018-01-11
Also published as: CN105979431A

Abstract

A passive radiator and a speaker, comprising: a diaphragm (1), a frame (2) and at least one folding ring assembly (3). The diaphragm (1) is provided at a middle portion of the frame (2), and is connected to an inner edge of the frame (2) through the folding ring assembly (3). The folding ring assembly (3) comprises an outer folding ring (31) at an outer layer, and an inner folding ring (32) at an inner layer. The outer folding ring (31) and the inner folding ring (32) respectively protrude in opposite directions relative to a plane in which the diaphragm (1) is located. The radius of the outer folding ring (31) is greater than that of the inner folding ring (32). The passive radiator and the speaker are capable of maximizing the flexibility of the diaphragm (1) and enhancing bass, as well as providing undistorted sound while ensuring linearity under a large amplitude.

Description

Passive radiator and speaker

The present application claims priority to Chinese Patent Application No. 201610529882.X, entitled "A Passive Radiator and Speaker", filed on July 06, 2016, the entire contents of which are incorporated by reference. In this application.

Technical field

The present invention relates to the field of speaker technologies, and in particular, to a passive radiator and a speaker.

Background technique

Passive Radiators (PRs) are often used by audio-visual manufacturers to cut corners by users who do not know the truth. It looks the same as a normal woofer in appearance; but inside, its structure is very different. There are no leads attached to it, and there are no common drive magnets on the back.

Sounds that use "passive radiators" typically contain an active speaker unit and a passive unit (passive radiator). The passive unit is usually similar in appearance to the active speaker unit, but without the voice coil and drive magnet. It has only one paper cone and is not connected to any voice coil or circuit. Passive radiators are often used to adjust the bass, allowing the designer to adjust the overall tone of the speaker. The passive radiator emits passive sound under the driving of the air in the box by the active unit in the speaker.

As an indispensable part of the passive radiator diaphragm, the Edge not only supports and maintains the movement of the diaphragm, but also allows the diaphragm to vibrate freely in the axial direction but not laterally. There are many shapes of the folding ring, and currently commonly used are corrugated folding rings and semi-annular folding rings. The corrugated folding ring is in the form of a plurality of corrugations. The expansion and contraction of the folding ring has a certain limit, and the displacement in the circumferential direction is limited in amplitude, and thus the linearity is not good. The semi-annular folding ring can be divided into an upper convex folding ring and a lower concave folding ring according to the direction of the protruding portion. The semi-annular folding ring allows for a larger amplitude than the wavy folding ring. However, in order to ensure linearity at a large amplitude, the width of the folded ring is increased, and thus the radius of curvature is also large, resulting in a decrease in the strength of the folded ring.

Summary of the invention

In order to solve the above technical problem, an embodiment of the present invention provides a passive radiator, including:

a diaphragm, a bracket and at least one folding ring set;

The diaphragm is disposed in a middle portion of the bracket, and the diaphragm is connected to the inner edge of the bracket through the folding ring group;

The folding ring set includes an outer folding ring on the outer layer and an inner folding ring on the inner layer;

The outer folding ring and the inner folding ring are inner and outer ring misalignment structures, and the outer folding ring and the inner folding ring are anterior and reversely raised with respect to a plane of the diaphragm.

Preferably, the radius of the outer fold ring is greater than the radius of the inner fold ring.

Preferably, the set of folds has a plurality of sets that surround the diaphragm.

Preferably, the outer fold ring of the outer layer and the inner fold ring of the inner layer are plural and the number is the same.

Preferably, the ridge direction of the adjacent outer fold ring or the adjacent inner fold ring is opposite with respect to the plane of the diaphragm.

Preferably, adjacent ends of the outer folding ring and the inner folding ring are separated by a preset distance in a vertical direction of the diaphragm.

Preferably, the outer fold ring has a cross-sectional shape that is semi-circular or V-shaped or sinusoidal.

Preferably, the cross-sectional shape of the inner folded ring is semicircular or V-shaped or sinusoidal.

Preferably, the highest point of the forward ridge of the outer fold ring or the inner fold ring does not exceed the upper plane of the bracket.

Preferably, the passive radiator is an integrally formed structure.

A speaker provided by an embodiment of the present invention includes:

At least one of the passive radiators described in any of the embodiments.

It can be seen from the above technical solutions that the embodiments of the present invention have the following advantages:

The embodiment of the invention provides a passive radiator, a speaker and a video and audio system, wherein the passive radiator comprises: a diaphragm, a bracket and at least one folding ring set; the diaphragm is arranged in the middle of the bracket, and the diaphragm passes through the folding ring group Connected to the inner edge of the bracket; the folding ring set includes an outer folding ring on the outer layer and an inner folding ring on the inner layer, and the outer folding ring and the inner folding ring are forward and reversely raised with respect to the plane of the diaphragm, and the outer folding ring The radius is greater than the radius of the inner fold. In this embodiment, the outer fold ring and the inner fold ring are forward and reverse with respect to the plane of the diaphragm by the outer fold ring located at the outer layer and the inner fold ring located at the inner layer, and the outer fold ring has a larger radius than the inner fold ring. The radius is such that when the paper film of the sounding unit vibrates, the outer folding ring and the inner folding ring are forward and reverse ridge structures with respect to the plane of the diaphragm, and the radius of the outer folding ring is larger than the radius of the inner folding ring, so that the radius of the outer folding ring is larger than the radius of the inner folding ring. The corresponding phase movement of the diaphragm not only ensures the high strength of the folding ring, but also greatly enhances the superposition of the sound and improves the linear vibration capability, and solves the problem that the current semi-annular folding ring is guaranteed at a large amplitude. Linearity, because the width of the folding ring is increased, the radius of curvature is also large, resulting in a technical problem of the strength of the folding ring being lowered.

Further, since the outer folding ring or the inner folding ring forms a sinusoidal or V-shaped cross section, the diaphragm is more linear when vibrating.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

1 is a schematic cross-sectional structural view of a passive radiator according to an embodiment of the present invention;

2 is a schematic perspective view of a passive radiator;

Figure 3 is a front view of the passive radiator;

The illustration shows: diaphragm 1, bracket 2, folding ring set 3, outer folding ring 31, inner folding ring 32, first outer folding ring 311, second outer folding ring 312, first inner folding ring 321, and second inner ring Folding ring 322.

detailed description

The passive radiator and the speaker provided by the embodiment of the invention solve the problem that the current semi-circular symmetric folding ring has a one-half ring shape, causing the diaphragm to vibrate, and the semi-annular resonance can improve the resonance due to the symmetry, but The technical problem that the effect of resonance is not linear enough, and the vibration of the corrugated ring structure diaphragm itself, due to its twisted force structure, leads to low resonance technology. Problems.

In order to make the object, the features and the advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. The described embodiments are only a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Referring to FIG. 1 to FIG. 3, an embodiment of a passive radiator provided by an embodiment of the present invention includes:

Diaphragm 1, bracket 2 and at least one folding ring set 3;

The diaphragm 1 is disposed in the middle of the bracket 2, and the diaphragm is connected to the inner edge of the bracket 2 through the folding ring group;

The ring set 3 includes an outer fold ring 31 on the outer layer and an inner fold ring 32 on the inner layer;

As shown in FIG. 1 and FIG. 2, the outer folding ring 31 and the inner folding ring 32 are anterior and reversely raised with respect to the plane of the diaphragm 1, and may be a forward ridge of the outer folding ring, a reverse bulge of the inner folding ring, or an outer folding. The ring is reversed and the inner fold is raised forward. The outer folded ring 31 and the inner folded ring 32 greatly increase the elasticity of the diaphragm 20, so that the diaphragm 20 can vibrate more frequently and with higher efficiency, and the bass effect of the sound can be improved to a large extent.

When the ring is vibrated, the portion closer to the center of the diaphragm has a larger shape variable, and the portion away from the center of the diaphragm is smaller in shape. Therefore, in this embodiment, the radius of the outer folded ring 31 is larger than that of the inner folded ring 32. The radius is such that the elasticity of the outer folded ring 31 is greater than the elasticity of the inner folded ring 32, so that the shape variables of the outer folded ring 31 and the inner folded ring 32 tend to coincide to ensure linearity at a large amplitude, so that the sound is not distorted. Preferably, the radius of the outer folded ring 31 is greater than the radius of the inner folded ring 32 is 0.5 mm, for example, the outer folded ring 31 has a radius of 2.1 mm, and the inner folded ring 32 has a radius of 1.6 mm. Here, the radius of the outer folded ring 31 and the radius of the inner folded ring 32 can be understood with reference to FIG. 1. The radius is the radius of the semicircle of the cross section. When the cross section is the other V rows and sinusoidal shapes described below, the radius is the radial dimension.

Further, the outer folded ring 31 includes an adjacent first outer folded ring 311 and a second outer folded ring 312. The inner folded ring 32 includes an adjacent first inner folded ring 321 and a second inner folded ring 322 adjacent to each other. The ridge direction of the first outer folding ring 311, the second outer folding ring 312 or the adjacent first inner folding ring 321 and the second inner folding ring 322 is opposite to the plane of the diaphragm, as shown in FIGS. 1 and 2, First outer folding ring 311 and The inner folding ring 321 is a folding ring set, the second outer folding ring 312 and the second inner folding ring 322 are another folding ring group, and the two folding ring groups are X-shaped from a plan view, wherein the first outer folding The ring 311 and the first inner folded ring 321 or the second outer folded ring 312 and the second inner folded ring 322 are swelled in forward and reverse directions, that is, the first outer folded ring 311 is swelled in the positive direction, and the first inner folded ring is The 321 is raised in the opposite direction. Similarly, the second outer folded ring 312 and the second inner folded ring 322 are also the same. It can be understood that there is no specific fixing in the forward and reverse directions, and only the adjacent first outer folded ring 311 is defined. The ridges of the second outer folded ring 312 or the adjacent first inner folded ring 321 and the second inner folded ring 322 are opposite to each other with respect to the plane of the diaphragm.

The folding ring group in which the unevenness is staggered can ensure the balance of the vibration of the diaphragm and the sound is not distorted. Therefore, the passive radiator of the embodiment improves the bass effect without distorting the sound.

Further, there are several groups of folding ring groups, one circumference around the diaphragm. It can be understood that one folding ring group is an outer folding ring 31 and an inner folding ring 32 which are adjacent to each other with a cross-section of the S-shaped structure. form. The outer folding ring 31 and the inner folding ring 32 in the above folding ring group are annular segments, and a plurality of outer folding rings 31 and inner folding rings 32 are alternately arranged in a concave shape. It can be understood that the outer folding ring 31 and the inner folding ring 32 are annular integral members around the diaphragm. Non-alternating arrangements are also possible, as long as the bending directions of the outer and inner folding rings are positive and negative with respect to the plane of the diaphragm. Just bulge.

Further, the outer folded ring 31 of the outer layer and the inner folded ring 32 of the inner layer are plural and the number is uniform.

Further, the adjacent ends of the outer folded ring 31 and the inner folded ring 32 are separated by a preset distance in the vertical direction of the diaphragm, and the preset distance is 0.4 mm, so that when the diaphragm 1 vibrates, the outer folded ring 31 and the inner fold Ring 32 can be a maximum amplitude resonance based on 0.4 mm.

Further, the cross-sectional shape of the outer folded ring 31 or the inner folded ring 32 is semicircular or V-shaped or sinusoidal.

Further, the diaphragm 1 is rectangular or circularly rectangular or circular, and the diaphragm 1 is made of silica gel, rubber, silicone rubber, etc., which are well known to those skilled in the art and will not be described herein.

Further, the highest point of the forward ridge of the outer folded ring 31 or the inner folded ring 32 does not exceed the upper plane of the bracket 2.

Preferably, the diaphragm 1 is a hollow cavity body, which is a weight member in the cavity, and the weight member may be iron Blocks, steel blocks, etc., the thickness of the entire passive radiator is about 5mm.

The passive radiator in this embodiment is an integrally formed structure, and can be integrally formed by potting, thereby ensuring airtightness.

The embodiment of the invention further provides a speaker, comprising:

At least one passive radiator in the embodiment shown in Figures 1 to 3.

It should be noted that the relationship between the passive radiator and the speaker is a well-known technology, and will not be described in detail herein.

The passive radiator, the speaker and the audio-visual system provided by the embodiment of the invention, wherein the passive radiator comprises: a diaphragm 1, a bracket 2 and at least one folding ring set 3; the diaphragm 1 is arranged in the middle of the bracket 2, and the vibration The film is connected to the inner edge of the bracket 2 through the folding ring group; the folding ring group 3 includes an outer folding ring 31 at the outer layer and an inner folding ring 32 at the inner layer, and the outer folding ring 31 and the inner folding ring 32 are opposite to the plane of the diaphragm 1 For the forward and reverse ridges, the radius of the outer folded ring 31 is greater than the radius of the inner folded ring 32. In this embodiment, the outer folded ring 31 and the inner folded ring 32 are forward and reversely raised with respect to the plane of the diaphragm 1 by the outer folded ring 31 located at the outer layer and the inner folded ring 32 located at the inner layer, and the outer folded ring 31 is extended. The radius of the inner folding ring 32 is larger than the radius of the inner folding ring 32, so that when the paper film of the sounding unit vibrates, the outer folding ring and the inner folding ring are forward and reverse convex structures with respect to the plane of the vibration film, and the radius of the outer folding ring is larger than The radius of the inner folding ring makes the diaphragm move in the same phase, which not only ensures the high strength of the folding ring, but also greatly enhances the superposition of sound and improves the linear vibration capability, and solves the current semi-annular folding ring. In order to ensure the linearity at a large amplitude, since the width of the folded ring is increased, the radius of curvature is also large, resulting in a technical problem that the strength of the folded ring is lowered.

Further, due to the inner and outer ring misalignment structure, that is, the outer folded ring 31 and the inner folded ring 32 are diagonally connected, the outer folded ring 31 and the inner folded ring 32 are formed with respect to the plane of the diaphragm 1 in the forward and reverse directions. The cross section is sinusoidal or V-shaped, and the diaphragm 1 is more linear when vibrating.

The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that The technical solutions described in the examples are modified, or some of the technical features are equivalently replaced; and these modifications or replacements do not make the corresponding technology The essence of the solution lies in the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

A passive radiator comprising:

a diaphragm, a bracket and at least one folding ring set;

The diaphragm is disposed in a middle portion of the bracket, and the diaphragm is connected to the inner edge of the bracket through the folding ring group;

The folding ring set includes an outer folding ring at the outer layer and an inner folding ring at the inner layer, and the outer folding ring and the inner folding ring are anterior and reversely raised with respect to a plane of the diaphragm, the outer The radius of the loop is greater than the radius of the inner loop.
The passive radiator according to claim 1, wherein the ridge direction of the adjacent outer folded ring or the adjacent inner folded ring is opposite to the plane of the diaphragm.
The passive radiator of claim 2 wherein said set of folds has a plurality of sets that surround the diaphragm.
The passive radiator according to claim 3, wherein said outer fold ring of the outer layer and said inner fold ring of the inner layer are plural and the number is uniform.
The passive radiator according to claim 1, wherein adjacent ends of said outer folded ring and said inner folded ring are separated by a predetermined distance in a direction perpendicular to said diaphragm.
The passive radiator according to any one of claims 1 to 5, wherein the outer folded ring has a semicircular or V-shaped or sinusoidal cross-sectional shape.
The passive radiator according to any one of claims 1 to 5, characterized in that the cross-sectional shape of the inner folded ring is semicircular or V-shaped or sinusoidal.
The passive radiator according to any one of claims 1 to 5, characterized in that the highest point of the forward ridge of the outer folding ring or the inner folding ring does not exceed the upper plane of the bracket.
The passive radiator of claim 1 wherein said passive radiator is an integrally formed structure.
A speaker, comprising:

At least one passive radiator as claimed in any one of claims 1 to 9.