WO2018050032A1

WO2018050032A1 - Speaker with planar vibrating diaphragm

Info

Publication number: WO2018050032A1
Application number: PCT/CN2017/101114
Authority: WO
Inventors: 邱士嘉; 游博丞; 孙伟
Original assignee: 万魔声学科技有限公司
Priority date: 2016-09-19
Filing date: 2017-09-08
Publication date: 2018-03-22
Also published as: CN206136279U

Abstract

Disclosed is a speaker with a planar vibrating diaphragm (200). The speaker comprises a housing (100), the vibrating diaphragm (200), a coil layer (300) and a magnetic system (400), wherein the vibrating diaphragm (200) is arranged on the housing (100); the coil layer (300) is arranged on the vibrating diaphragm (200); the coil layer (300) comprises mutually parallel straight line segments (310) and connecting segments (320) connected between the straight line segments (310); the magnetic system (400) comprises first magnets (410) and second magnets (420), alternately arranged at intervals, and first reinforcing magnets (430) arranged between the first magnets (410) and the second magnets (420), the magnets being adjacent to each other; poles, arranged at the same side of the vibrating diaphragm (200) and close to one end of the vibrating diaphragm (200), of the first magnets (410) and the second magnets (420) are opposite; and the direction of a magnetic field formed, at one side close to the vibrating diaphragm (200), by the first reinforcing magnets (430) is the same as that of a magnetic field formed, at one side close to the vibrating diaphragm (200), by the first magnets (410) and the second magnets (420), the magnets being adjacent to each other.

Description

Plane diaphragm speaker

Technical field

The invention relates to the technical field of loudspeakers, in particular to a planar diaphragm loudspeaker.

Background technique

Generally, the horn emits sound by oscillating the voice coil in a magnetic field formed by a magnetic steel, a washer, and a magnetically permeable cover, and the magnetic field drives the voice coil with the audio current to vibrate, and the horn of the structure causes the thickness of the speaker. Larger, it is difficult to meet the requirements of small electronic devices for small speaker size (light and thin). To overcome the shortcomings of the prior art, the coil is placed on the diaphragm by silk screen to form a planar diaphragm, which can significantly reduce the volume of the speaker. And weight, however, this type of horn has a low volume defect.

Summary of the invention

The present application discloses a planar diaphragm horn to address one or more of the problems involved in the background.

A planar diaphragm horn comprising:

case;

a diaphragm disposed on the housing;

a coil layer disposed on the diaphragm and connected between the positive electrode and the negative electrode of the signal source, including straight segments parallel to each other, and a connecting segment connected between the straight segments;

a magnetic system, fixed in the housing, comprising first and second magnets arranged at a staggered interval, and a first reinforcing magnet located between the adjacent first magnet and the second magnet; a magnet and the second magnet are located on the same side of the diaphragm, and a magnetic pole is opposite to an end of the diaphragm, and a direction of a magnetic field formed by the first reinforcing magnet near a side of the diaphragm is adjacent to The direction of the magnetic field formed by the first magnet and the second magnet adjacent to the side of the diaphragm is the same;

The straight line segment corresponding to the magnetic field formed by the first magnet and the second magnet and the first A superimposed magnetic field of a magnetic field in the same direction formed by a reinforcing magnet.

Details of one or more embodiments of the invention are set forth in the accompanying drawings and description below. Other features, objects, and advantages of the invention will be apparent from the description and appended claims.

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 creative work.

1 is a schematic structural view showing a first diaphragm and a second magnet of a planar diaphragm horn provided on the same side of a diaphragm as a first reinforcing magnet;

2 is a schematic structural view of a planar diaphragm horn provided with a second reinforcing magnet according to an embodiment;

FIG. 3 is a schematic structural view showing the first magnet and the second magnet and the first reinforcing magnet respectively located on different sides of the diaphragm in the planar diaphragm horn provided by an embodiment; FIG.

4 is a schematic diagram showing a magnetic field distribution of a magnetic system in a planar diaphragm horn according to an embodiment;

FIG. 5 is a schematic top plan view of a planar diaphragm horn provided by an embodiment.

detailed description

In order to facilitate the understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the invention are given in the drawings. However, the invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be more fully understood.

It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or the element can be present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or. The terms "internal," "external," "left," "right," and the like, as used herein, are for illustrative purposes only and are not intended to Representation is the only implementation.

1 and 5, a planar diaphragm 200 horn includes a housing 100, a diaphragm 200, a coil layer 300, and a magnetic system 400. The diaphragm 200 is fixed to the casing 100, and the coil layer 300 is disposed on the diaphragm 200. Both ends of the coil layer 300 are respectively connected to the positive electrode 510 and the negative electrode 520 of the signal source. The coil layer 300 includes a plurality of coil conductors arranged side by side in the horizontal direction. The coil conductor includes a plurality of straight sections 310 and a connecting section 320. The plurality of straight sections 310 are spaced apart from each other and are parallel to each other. The connecting section 320 is connected to the straight section 310. Meanwhile, the connecting section 320 has an arc shape, and the arc-shaped connecting section 320 connects the straight sections 310 in series to form an entire coil conductor. The entire coil conductor is a spiral S or serpentine shape. In other embodiments, the connecting section 320 is linear, and the entire conductor has a square wave shape.

Referring to FIG. 1, the magnetic system 400 is fixed in the housing 100, and includes a first magnet 410, a second magnet 420, and a first reinforcing magnet 430. The first reinforcing magnet 430 is located adjacent to the first magnet 410 and the second magnet 420. Preferably, the distance between the first reinforcing magnet 430 and the first magnet 410 and the second magnet 420 is kept equal, and the first magnet 410 and the second magnet 420 are located on the same side of the diaphragm 200, and both are close to the diaphragm. The magnetic poles at one end of the 200 are opposite, and the direction of the magnetic field formed by the first reinforcing magnet 430 near the diaphragm 200 is the same as the direction of the magnetic field formed by the first magnet 410 and the second magnet 420 near the diaphragm 200 side.

The straight line segment 310 of the coil conductor is correspondingly disposed in a superimposed magnetic field of a magnetic field formed by the first magnet 410 and the second magnet 420 and the same direction magnetic field formed by the first reinforcing magnet 430 to obtain a larger magnetic field strength; The straight line segment 310 of the coil conductor is disposed opposite to the first reinforcing magnet 430, that is, the straight line segment 310 of the coil conductor is disposed opposite to the first reinforcing magnet 430, so that the straight line segment 310 is disposed in the magnetic field with the highest combined intensity, Get a greater magnetic field strength.

Specifically, the first magnet 410, the second magnet 420, and the first reinforcing magnet 430 are all strip magnets, and the first magnet 410 and the second magnet 420 are vertically disposed, and the first reinforcing magnet 430 is disposed laterally. A magnet 410 and a second magnet 420 are alternately spaced apart from each other. In one embodiment, the first magnet 410 and the second magnet 420 are disposed at intervals as a unit group, and then the plurality of unit groups are spaced apart. Another embodiment The first magnet 410, the second magnet 420, the first magnet 410, and the second magnet 420 are arranged in an array. First reinforcing magnet 430 and first magnet 410 and The two magnets 420 are all located on the same side of the diaphragm 200, and the first reinforcing magnets 430 are arranged side by side between the adjacent first magnet 410 and the second magnet 420. In one embodiment, the first magnet 410 in one unit group and A first reinforcing magnet 430 is disposed between the second magnets 420 and between the unit groups.

Referring to FIG. 4, when the audio current flows from the outer surface of the paper to the paper surface through a certain straight line segment 310 of the coil conductor, the second magnet 420 is located on the left side of the first magnet 410, and the N pole of the first magnet 410 and the second magnet 420 The S poles are respectively close to the side of the diaphragm 200, and the magnetic field lines start from the N pole of the first magnet 410 and reach the S pole of the second magnet 420 (the magnetic field direction is leftward), while the N pole of the first reinforcing magnet 430 is close to the first pole. The magnet 410, the S pole of the first reinforcing magnet 430 is close to the second magnet 420, and the magnetic field line starts from the N pole of the first reinforcing magnet 430 and reaches the S pole of the first reinforcing magnet 430 (the magnetic field direction is also leftward). On one side of the film 200, due to the action of the first reinforcing magnet 430, the magnetic field of the first reinforcing magnet 430 is positively correlated with the magnetic field formed between the first magnet 410 and the second magnet 420, and the magnetic field of the coil conductor is The magnetic field strength is greatly enhanced, the driving force of the diaphragm layer 300 driving the diaphragm 200 is increased, the amplitude of the diaphragm 200 is increased, and the sound pressure level (volume) of the horn is increased. According to the left hand rule, the straight line segment 310 vibrates upward.

Referring to FIG. 4, when the audio current flows from the paper surface to the outside of the paper through a certain straight line segment 310 of the coil conductor, that is, when the audio current flows from the paper surface to the paper surface through a certain straight line segment 310 of the coil conductor, the audio current continues. When flowing through the connecting section 320 and flowing through a straight line segment 310 parallel to the nearest straight line segment 310, the second magnet 420 is located on the right side of the first magnet 410, and the N pole and the second magnet 420 of the first magnet 410 The S poles are respectively close to the side of the diaphragm 200, and the magnetic field lines start from the N pole of the first magnet 410 and reach the S pole of the second magnet 420 (the magnetic field direction is right), and the N pole of the first reinforcing magnet 430 is close to the first pole. a magnet 410, the S pole of the first reinforcing magnet 430 is close to the second magnet 420, and the magnetic field line starts from the N pole of the first reinforcing magnet 430 and reaches the S pole of the first reinforcing magnet 430 (the magnetic field direction is also to the right), in the vicinity One side of the diaphragm 200, due to the action of the first reinforcing magnet 430, the magnetic field of the first reinforcing magnet 430 is positively correlated with the magnetic field formed between the first magnet 410 and the second magnet 420, and the magnetic field of the coil conductor The magnetic field strength is greatly enhanced, the coil layer 300 The amplitude formed by the driving diaphragm 200 is increased, and the sound pressure level (volume) of the horn is increased. According to the left hand rule, the straight line segment 310 also vibrates upward.

Therefore, by the staggered arrangement of the first magnet 410 and the second magnet 420, the direction of the magnetic field between the adjacent first magnet 410 and the second magnet 420 is just changed, while the N pole of the first reinforcing magnet 430 is close to the first The magnet 410, the S pole of the first reinforcing magnet 430 is close to the second magnet 420, and the direction of the reinforcing magnetic field generated by the first reinforcing magnet 430 is correspondingly changed to form a positive correlation superposition effect, and the coil conductor is caused by the combination of the two magnetic fields. The direction of vibration of the straight line segments 310 of the two adjacent current directions is kept uniform, and finally the entire coil conductor and the coil layer 300 are vibrated synchronously.

Referring to FIG. 2, in order to further strengthen the strength of the magnetic field in which the coil layer 300 is located, the magnetic system 400 further includes a second reinforcing magnet 440 disposed on the housing 100 and located on the other side of the diaphragm 200, second. The reinforcing magnet 440 is disposed opposite to the first reinforcing magnet 430, and the direction of the magnetic field of the second reinforcing magnet 440 near the diaphragm 200 is the same as the direction of the magnetic field of the first reinforcing magnet 430 near the diaphragm 200, and therefore, the first magnet 410 Under the action of the magnetic field between the second magnet 420, the magnetic field of the first reinforcing magnet 430 and the magnetic field of the second reinforcing magnet 440, the three together form a positive correlation superposition effect, and the magnetic field strength generated by the magnetic system 400 is further increased, thereby Further improve the sound pressure level of the horn.

When the first magnet 410, the second magnet 420, and the first reinforcing magnet 430 are both located on the same side of the diaphragm 200, the first reinforcing magnet 430 is just sandwiched between the first magnet 410 and the second magnet 420, first The reinforcing magnet 430 maintains a set gap between the first magnet 410 and the second magnet 420, respectively. Of course, the gap between the first reinforcing magnet 430 and the first magnet 410 and the second magnet 420 may be zero. At this time, the magnetic field strength of the magnetic system 400 reaches a maximum value, because the first magnet 410 and the second magnet 420 respectively Connected to the housing 100 through the magnet support frame, in order to make the diaphragm 200 breathable, to ensure the sound pressure level of the speaker, a vent hole is arranged on the magnet support frame, and the horn has a high sound through the vent hole. Pressure level.

Referring to FIG. 3, in an embodiment, the first reinforcing magnet 430 is located on one side of the diaphragm 200, and the first magnet 410 and the second magnet 420 are located on the other side of the diaphragm 200. That is, the first reinforcing magnet 430 and the first magnet 410 and the second magnet 420 are separated from each other on both sides of the diaphragm 200. Similarly, the first reinforcing magnet 430 generates a magnetic field and the magnetic field generated between the first magnet 410 and the second magnet 420 is positive. With the associated superposition effect, the magnetic field strength of the magnetic system 400 increases.

Referring to FIG. 1 to FIG. 3 and FIG. 5 , specifically, the diaphragm 200 includes an edge folded portion 220 and a central flat portion 210 . The edge folded portion 220 is fixed on the casing 100 , and the edge folded portion 220 is curved. The central plane portion 210 is located at the center of the diaphragm 200, and the central plane portion 210 is fixed by a copper ring. When the coil layer 300 drives the edge loop portion 220 to vibrate, the horn can maintain a good bass effect.

Of course, the diaphragm 200 can be made of foamed plastic, the foamed plastic is porous structure, the diaphragm 200 made of foamed plastic has good rigidity, and because of the honeycomb structure, the hollow mass is light, and the diaphragm 200 does not need to be tensioned. The stretch film treatment will not appear sagging, which can maintain the good bass effect of the speaker.

The number of the coil layers 300 is one layer, or two layers or even more. The two coil layers 300 are stacked on top of each other. Under the driving of the two coil layers 300, the amplitude of the diaphragm 200 is significantly improved, further enhancing the horn. Sound pressure level. In one embodiment, the upper and lower coil layers 300 are respectively connected to the positive and negative poles of the signal source, and the current directions of the straight segments of the upper and lower coil layers 300 are uniform, and the upper and lower layers are respectively disposed on both sides of the diaphragm 200. In another embodiment, one end of the first layer coil layer 300 is connected to the positive electrode of the signal source, and the other end of the first layer coil layer 300 is electrically connected to one end of the second layer coil layer 300, and the second layer coil layer 300 is The other end is connected to the negative pole of the signal source, and at the same time, the current directions of the straight segments of the upper and lower coil layers 300 are uniform, and the upper and lower layers are respectively disposed on both sides of the diaphragm 200.

The coil layer 300 can be made of a conductive material such as a diamond-like carbon material, a graphene material or a metal material. The graphene material has excellent electrical and thermal conductivity, and improves the heat dissipation capability and acoustic-electric conversion rate of the horn, and the coil of the graphene material. The layer 300 is lighter and has good mechanical strength, and is in line with the trend of thinning and thinning of the horn.

The technical features of the above-described embodiments may be arbitrarily combined. For the sake of brevity of description, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be considered as the scope of this manual.

The above-described embodiments are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but is not to be construed as limiting the scope of the invention. It should be noted that a person skilled in the art can also make certain numbers without departing from the inventive concept. Modifications and improvements are within the scope of the invention. Therefore, the scope of the invention should be determined by the appended claims.

Claims

A planar diaphragm horn comprising:

case;

a diaphragm disposed on the housing;

a coil layer disposed on the diaphragm and connected between the positive electrode and the negative electrode of the signal source, including a straight line segment parallel to each other, and a connecting portion connected between the straight line segments;

a magnetic system, fixed in the housing, comprising first and second magnets arranged at a staggered interval, and a first reinforcing magnet located between the adjacent first magnet and the second magnet; a magnet and the second magnet are located on the same side of the diaphragm, and a magnetic pole is opposite to an end of the diaphragm, and a direction of a magnetic field formed by the first reinforcing magnet near a side of the diaphragm is adjacent to The direction of the magnetic field formed by the first magnet and the second magnet adjacent to the side of the diaphragm is the same;

The straight line segment is correspondingly disposed in a superimposed magnetic field of a magnetic field formed by the first magnet and the second magnet and a magnetic field in the same direction formed by the first reinforcing magnet.
The planar diaphragm horn according to claim 1, wherein both the first reinforcing magnet and the first magnet and the second magnet are located on the same side of the diaphragm.
A planar diaphragm horn according to claim 2, wherein said magnetic system further comprises a first portion disposed on said other side of said diaphragm on said housing and opposed to said first reinforcing magnet And a reinforcing magnet, wherein a direction of a magnetic field of the second reinforcing magnet adjacent to the diaphragm is the same as a direction of a magnetic field of the first reinforcing magnet adjacent to the diaphragm.
The planar diaphragm horn according to claim 2, wherein a gap between the first reinforcing magnet and the first magnet and the second magnet is zero, the first magnet, the first magnet The second magnet is connected to the housing through a magnet support frame, and the magnet support frame is provided with a venting hole through which the airflow passes.
The planar diaphragm horn according to claim 2, wherein the first reinforcing magnets maintain a set gap between the first magnet and the second magnet.
A planar diaphragm horn according to claim 1, wherein said first reinforcing magnet is located at one side of said diaphragm; said first magnet and said second magnet are located at another of said diaphragm side.
A planar diaphragm horn according to claim 1, wherein said diaphragm comprises an edge loop portion connected to said housing, and said edge loop portion connected to said edge loop portion for mounting said coil layer A central flat portion on which a copper ring for reinforcing the rigidity of the central flat portion is provided.
The planar diaphragm horn according to claim 1, wherein the diaphragm is a foam diaphragm having a porous structure.
The planar diaphragm horn according to claim 1, wherein the number of the coil layers is two layers which are vertically stacked.
The planar diaphragm horn according to claim 1, wherein the coil layer is a diamond-like carbon coil layer, a graphene coil layer or a metal coil layer.