WO2023093528A1

WO2023093528A1 - Moving-iron exciter and audio device

Info

Publication number: WO2023093528A1
Application number: PCT/CN2022/130775
Authority: WO
Inventors: 秦仁轩; 刘阳; 赵文畅; 常晶
Original assignee: 华为技术有限公司
Priority date: 2021-11-24
Filing date: 2022-11-09
Publication date: 2023-06-01
Also published as: CN116170724A

Abstract

The present application belongs to the technical field of audio. Disclosed are a moving-iron exciter and an audio device. The moving-iron exciter comprises a housing, a plurality of voice coils, a plurality of magnetic members and a plurality of hanging members, wherein the housing comprises a first face and a second face, which are arranged back to back; the plurality of hanging members at least comprise first hanging members; each voice coil is connected to the housing; and each magnetic member is connected to the first face of the housing by means of the first hanging members, and each magnetic member is suspended in at least one voice coil. In the present application, each magnetic member is relatively close to the at least one voice coil, so that a magnetic field at each position of each magnetic member can be superposed with a magnetic field of the at least one voice coil, and the magnetism of each magnetic member at each position can be fully utilized, thereby improving the magnetic utilization rate of each magnetic member and the sound production efficiency of an audio device which is provided with the moving-iron exciter.

Description

Moving iron exciter and audio equipment

This disclosure claims the priority of the Chinese patent application with the application number 202111403279.4 and the invention title "Moving Iron Exciter and Audio Equipment" filed on November 24, 2021, the entire contents of which are incorporated by reference in this application.

technical field

The present application relates to the field of audio technology, in particular to a moving iron exciter and audio equipment.

Background technique

The moving iron exciter is a driving device that realizes non-porous sound generation. For example, the moving iron exciter can realize non-porous sound generation of the display screen. If the moving iron exciter is fixed on the inner surface of the non-porous display screen, the moving iron exciter can drive the display screen to vibrate, and the display screen vibrates to generate sound waves, so that the display screen can produce sound without holes.

The moving iron exciter mainly includes a voice coil and a magnetic part, and the magnetic part is suspended in the voice coil. Among them, the voice coil is a kind of coil. When a changing current is passed into the voice coil, the voice coil will generate a changing magnetic field, and the magnetic parts suspended in the voice coil will move in the changing magnetic field, thereby driving the display screen to vibrate.

Contents of the invention

When the moving iron exciter in the related art is applied to a larger display screen, the size of the voice coil and the magnetic part will increase accordingly. Although the size of the magnetic part increases, the magnetic part is only close to the voice coil. There is a large force between the edge part and the voice coil, which has a greater effect on the movement of the magnetic part, while the central part of the magnetic part far away from the voice coil has a smaller force between the voice coil and the movement of the magnetic part. Offers little effect. It can be seen that although the size of the magnetic member is large, the magnetic utilization rate of the magnetic member is relatively low. However, once the magnetic utilization rate of the magnetic part is relatively low, the efficiency of the moving iron exciter to excite the display screen to produce sound will be low.

This application provides a moving iron exciter and audio equipment, which can solve the problem of low sounding efficiency caused by low magnetic utilization of magnetic parts in the related art. The technical solution is as follows:

In one aspect, a moving iron exciter is provided, the moving iron exciter includes a casing, a plurality of voice coils, a plurality of magnetic elements and a plurality of suspension elements, the casing includes a first surface and a second surface facing the back device , the plurality of suspension parts at least include a first suspension part; each voice coil is connected to the housing, each magnetic part is connected to the first surface of the housing through the first suspension part, and each magnetic part The suspension is located in at least one voice coil.

In the solution shown in this application, the moving iron exciter includes a plurality of voice coils and a plurality of magnetic parts, and each magnetic part is located in at least one voice coil. In this way, the distance between each magnetic part and at least one voice coil can be relatively close. Then, the magnetic field at each position of each magnetic part can be superimposed with the magnetic field of at least one voice coil, and it is possible to make full use of each magnetic part in each position. The magnetism at the position, thereby improving the magnetic utilization rate of the magnetic parts.

Once the magnetic utilization rate of the magnetic part is improved, the efficiency of the moving iron exciter to excite the sounding body to produce sound can also be improved. This is because the magnetic utilization rate of the moving iron exciter is high, so inputting a small electrical signal (such as current or voltage) to the moving iron exciter can also excite the sounding body to output audio with the same effect to the moving iron exciter. The iron exciter inputs an electrical signal of the same magnitude, but it can excite the sounding body to output better audio. Therefore, the moving iron exciter can improve the sound generation efficiency of the audio equipment.

In a possible implementation, multiple voice coils are arranged sequentially from the inside to the outside; a part of the magnetic parts is suspended in the annular space between two adjacent voice coils, and another part of the magnetic parts is suspended in the innermost in the voice coil.

Wherein, the center lines of the multiple voice coils are collinear, that is, the multiple voice coils are arranged on the same axis, and the center lines of the multiple voice coils coincide on the same straight line.

In a possible implementation manner, the multiple voice coils include a first voice coil and multiple second voice coils, the multiple second voice coils are all located in the first voice coil, and the space in each second voice coil is not Intersect; a part of the magnetic parts is suspended in the space inside the first voice coil and outside all the second voice coils, and another part of the magnetic parts is suspended in each second voice coil.

In a possible implementation manner, each magnetic member includes a first surface and a second surface disposed opposite to each other, the first surface of the housing corresponds to the first surface of the magnetic member, and the first surface of the housing corresponds to the first surface of the magnetic member. The second surface corresponds to the second surface of the magnetic piece; the first surface of the magnetic piece is connected to the first surface of the housing through the first suspension piece, and the second surface of the magnetic piece The second suspension is connected to the second surface of the housing.

Wherein, the first surface of the magnetic piece can be marked as the upper surface of the magnetic piece, and the second surface of the magnetic piece can be marked as the lower surface of the magnetic piece. Wherein, the first surface of the housing may be the top plate of the upper cover, and the second surface of the housing may be the bottom plate of the base.

In the scheme shown in this application, the upper surface and the lower surface of each magnetic part are connected with suspension parts. Compared with only one surface connected with suspension parts, the vibration of the magnetic parts in the vertical direction perpendicular to the upper surface and the lower surface It is more stable and weakens the polarization of the front and rear vibrations or left and right vibrations of the magnetic parts. This can reduce the collision between the magnetic part and the voice coil, so that the vibration of the magnetic part in the vertical direction is relatively pure, so the sound emitted by the excitation sound emitting body (such as a display screen) is also relatively pure, which can reduce noise.

In a possible implementation, each suspension includes a fixed part and an elastic arm; one end of the elastic arm of each suspension is connected to the fixed part, and the other end is connected to the housing; each magnetic part is connected to the corresponding suspension The fixed part connection.

Wherein, the suspension piece corresponding to the magnetic piece can also be understood as, if the magnetic piece is suspended on one side, the suspension piece corresponding to the magnetic piece is the first suspension piece, and if the magnetic piece is double-sided suspension, then the suspension piece corresponding to the magnetic piece is The parts include a first suspension part and a second suspension part.

Further, if the magnetic part is suspended from one side, the magnetic part is connected to the fixing part of the corresponding suspension part. It can be understood that the first surface of the magnetic part is connected to the fixing part of the first suspension part. And if the magnetic part is double-sided suspension, then the magnetic part is connected to the fixed part of the corresponding suspension part. The fixed parts of the two suspension parts are connected.

Similarly, if the magnetic part is suspended from one side, and the elastic arm of the suspension part is connected to the casing, it can be understood that the elastic arm of the first suspension part is connected to the first surface of the casing. And if the magnetic part is double-sided suspension, the elastic arm of the suspension part is connected with the housing, it can be understood that the elastic arm of the first suspension part is connected with the first surface of the housing, and the elastic arm of the second suspension part is connected with the first surface of the housing. The second side is connected.

Wherein, the number of elastic arms of each suspension member can be one or more.

In the solution shown in this application, the number of elastic arms of each suspension can be one, and the elastic arms can be vertically connected to the upper surface of the magnetic member, and/or the elastic arms can also be vertically connected to the lower surface of the magnetic member , the end of the elastic arm away from the magnetic part is connected to the inner surface of the casing.

In the solution shown in this application, the number of elastic arms of each suspension can be multiple, and these elastic arms can be evenly arranged along the fixed part, or these elastic arms can be arranged along the fixed part according to the specific shape of the fixed part. For example, if the shape of the fixing part of the suspension is rectangular, then the four elastic arms can be respectively located at the four corners of the fixing part of the rectangle.

In the scheme shown in this application, each suspension part includes a fixed part and a plurality of elastic arms, and the plurality of elastic arms are fixedly connected with the magnetic part by means of the fixed part, so as to facilitate the control of the vibration direction of the magnetic part, and the actual vibration of the magnetic part is not easy to occur The case where there is a large deviation from the ideal vibration.

And once the vibration direction of the magnetic part is well controlled, the collision between the magnetic part and the surrounding can be reduced, so that the vibration of the magnetic part in the vibration direction is relatively pure, then the sound emitted by the exciting sounding body is also relatively pure, which can weaken the noise , to improve the vibration effect of the sounding body.

In a possible implementation manner, the shape of the spring arm of each suspension member is a bar shape, and the bend is located between the housing and the fixing part.

In the solution shown in this application, the spring arm that provides elasticity of each suspension is in the shape of a bar, and is bent between the housing and the fixing part, so that the length of the spring arm can be extended, and once the length of the spring arm is extended, all the elastic arms can be extended. Suspended magnetic pieces are prone to vibration.

In a possible implementation manner, each magnetic part and the connected suspension part constitute a vibration system. Wherein, the suspension part connected with the magnetic part may be the first suspension part, or may include the first suspension part and the second suspension part. For example, if the magnetic part belongs to single-sided suspension, the suspension includes a first suspension, then the magnetic part and the first suspension connected to the first surface of the magnetic part form a vibration system, and if each If a magnetic part belongs to double-sided suspension, the suspension part includes a first suspension part and a second suspension part, then the magnetic part, the first suspension part connected to the first surface of the magnetic part, and the first suspension part connected to the magnetic part The second suspension on the two surfaces constitutes a set of vibration system.

Since there are multiple magnetic parts, and the suspension parts connected to different magnetic parts are also different, then the moving iron exciter includes multiple sets of vibration systems. For example, the magnetic part includes an outer magnetic part and an inner magnetic part, so the outer magnetic part, the first outer suspension part connected to the upper surface of the outer magnetic part and the second outer suspension part connected to the lower surface of the outer magnetic part form a set of vibration system. The inner magnetic part, the first inner suspension connected to the upper surface of the inner magnetic part and the second inner suspension connected to the lower surface of the inner magnetic part constitute another vibration system.

Wherein, each vibrating system has a resonant frequency, and the resonant frequency of each vibrating system may be the same or different.

In a possible implementation manner, for every two sets of vibration systems with different resonance frequencies, the resonance frequency of one set of vibration systems is located in an attenuation frequency band of the resonance frequency of the other set of vibration systems.

In the solution shown in this application, the resonant frequencies of each vibrating system are not equal, and the resonant frequency of one vibrating system is located in the attenuation frequency band of the other vibrating system, which can broaden the frequency band of the equivalent resonant frequency of the moving iron exciter.

Wherein, the resonant frequency of each vibrating system is related to the connected suspension parts, for example, the resonant frequency of the vibrating system can reach an ideal value by adjusting the elasticity and quality of the suspension parts.

The solution shown in this application can widen the frequency band of the equivalent resonance frequency of the moving iron exciter. Once the frequency band of the equivalent resonant frequency of the moving iron exciter is wider, it is possible to input more frequency currents to the moving iron exciter, and both can excite the sounding body to emit a louder audio frequency, which also broadens the range of The frequency band of the excitation signal input by the moving iron exciter will also promote the moving iron exciter to have a better sounding effect.

In a possible implementation manner, the magnetic member includes a magnet and two magnetically conductive plates, and the magnet is located between the two magnetically conductive plates.

Wherein, the magnet may be a permanent magnet with a magnetic field around it. The magnetically conductive plate can be a non-magnetic metal plate. The magnetic induction line in the magnetic field of the magnetic part can be directed from one magnetically conductive plate to another magnetically conductive plate.

In the solution shown in this application, the magnetically conductive plates play the role of accumulating the magnetic induction lines in the magnetic field. In the voice coil where the parts are located, to enhance the magnetic field strength of the magnet in the voice coil.

In a possible implementation manner, the moving iron exciter further includes a circuit board, the circuit board is connected to the casing, and the voice coil is electrically connected to the circuit board.

Wherein, the circuit board is connected with the casing, and one end protrudes from the casing to be electrically connected with the peripheral circuit, so that the peripheral circuit can input current to the voice coil.

In the solution shown in this application, the structural features of the circuit board are similar to those of the fixed plate of the housing, and the circuit board can be connected between the fixed frame and the fixed plate of the housing, for example, can be fixed on the base of the housing Between the frame and the fixed plate, it can also be fixed between the fixed frame and the fixed plate of the upper cover of the housing.

In another aspect, an audio device is provided. The audio device includes a sounding body and the above-mentioned moving iron exciter, and the moving iron exciter is fixed on the inner surface of the sounding body inside the audio device.

Wherein, the sound emitting body may be a display screen of the audio device, or a casing of the audio device, such as a middle frame of the audio device.

In the solution shown in this application, the moving iron exciter included in the audio equipment includes a plurality of voice coils and a plurality of magnetic parts, and each magnetic part is located in at least one voice coil. In this way, the distance between each magnetic part and at least one voice coil can be relatively close. Then, the magnetic field at each position of each magnetic part can be superimposed with the magnetic field of at least one voice coil, and it is possible to make full use of each magnetic part in each position. The magnetism at the position, thereby improving the magnetic utilization rate of the magnetic parts.

Once the magnetic utilization rate of the magnetic part is improved, the efficiency of the moving iron exciter to excite the sounding body to produce sound can also be improved. This is because the magnetic utilization rate of the moving iron exciter is high, then, inputting a small electrical signal (such as current or voltage) to the moving iron exciter can also excite the sounding body to output the audio frequency with the same effect, or, Inputting an electric signal of the same size to the moving iron exciter can excite the sounding body to output better audio, so the moving iron exciter can improve the sound generation efficiency of the audio equipment.

In addition, the suspension parts connected to each magnetic part of the moving iron exciter are independent of each other and not connected to each other, so that the moving iron exciter includes a plurality of mutually independent vibration systems, so the resonant frequency of each vibration system can be adjusted so that The frequency band of the equivalent resonant frequency of the moving iron exciter is relatively wide, and/or, the amplitude of the moving iron exciter at the equivalent resonant frequency is relatively large. Wherein, the resonant frequency of each vibration system can be adjusted by adjusting the elasticity or quality of the suspension parts of each vibration system.

Description of drawings

Fig. 1 is a schematic diagram of an audio device including a moving iron exciter provided by the present application;

Fig. 2 is a schematic diagram of explosion of a moving iron exciter provided by the present application;

Fig. 3 is a schematic diagram of a casing and a suspension of a moving iron exciter provided by the present application;

Fig. 4 is a schematic structural view of a moving iron exciter provided by the present application;

Fig. 5 is a schematic cross-sectional view along A-A in Fig. 4 of a moving iron exciter provided by the present application;

Fig. 6 is a schematic diagram of the arrangement of multiple voice coils of a moving iron exciter provided by the present application;

Fig. 7 is a schematic diagram of the arrangement of multiple voice coils and multiple magnetic parts of a moving iron exciter provided by the present application;

Fig. 8 is a schematic diagram of the arrangement of multiple voice coils and multiple magnetic parts of a moving iron exciter provided by the present application;

Fig. 9 is a schematic diagram of a casing of a moving iron exciter provided by the present application;

Fig. 10 is a schematic diagram of connection between a fixed frame and a suspension of a moving iron exciter provided by the present application;

Fig. 11 is a schematic diagram of the connection between the fixed plate and the suspension of a moving iron exciter provided by the present application;

Fig. 12 is a schematic diagram of the connection between a magnetic part and a suspension provided by the present application;

Fig. 13 is a schematic diagram of a moving iron exciter provided by the present application;

Fig. 14 is a structural schematic diagram of a magnetic part of a moving iron exciter provided by the present application;

Fig. 15 is an exploded schematic diagram of a moving iron exciter provided by the present application;

Fig. 16 is a schematic cross-sectional view along A-A in Fig. 4 of a moving iron exciter provided by the present application.

illustration

10. Sounding body; 20. Moving iron exciter;

1. Shell; 1A, upper cover; 1B, base; 11, fixed frame; 12, fixed plate;

111, side wall; 112, horizontal frame; 121, outer frame; 122, inner frame; 123, connection frame;

2. Voice coil; 21. First voice coil; 22. Second voice coil; 2a, inner voice coil; 2b, outer voice coil;

3. Magnetic parts; 31. Magnet; 32. Magnetic plate; 3a, inner magnetic parts; 3b, outer magnetic parts;

4. Hanger; 41. The first hanger; 41a, the first inner hanger; 41b, the first outer hanger;

42, the second hanger; 42a, the second inner hanger; 42b, the second outer hanger;

43. Fixed part; 44. Elastic arm;

5. Circuit board.

Detailed ways

Although the description of the present application will be presented in conjunction with some embodiments, this does not mean that the features of the application are limited to the embodiments. On the contrary, the purpose of introducing the application in conjunction with the embodiments is to cover other options or modifications that may be extended based on the claims of the present application. The following description contains numerous specific details in order to provide an in-depth understanding of the present application. The application may also be practiced without these details. Furthermore, some specific details will be omitted from the description in order to avoid obscuring or obscuring the focus of the application. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

In this embodiment of the application, the terms "first", "second", "third", and "fourth" are used for descriptive purposes only, and should not be understood as indicating or implying relative importance or implicitly indicating the indicated The number of technical characteristics. Thus, a feature defined as "first", "second", "third" and "fourth" may expressly or implicitly include one or more of such features.

In the embodiment of this application, "and/or" is just a kind of relationship describing the relationship between related objects, which means that there may be three kinds of relationships, for example, A and/or B, which can mean that A exists alone, and A and B exist at the same time. B, there are three situations of B alone. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

In the description of the embodiments of this application, it should be noted that unless otherwise specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, "connection" can be detachably connected, or It is a non-detachable connection; it can be directly connected or indirectly connected through an intermediary. The orientation terms mentioned in the embodiments of the present application, such as "upper", "lower", "left", "right", "inner", "outer", etc., are only referring to the directions of the drawings, therefore, use The orientation terms are for better and clearer explanation and understanding of the embodiments of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a Limitations of the application examples. "Multiple" means at least two.

Reference to "one embodiment" or "some embodiments" or the like in this specification means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in other embodiments," etc. in various places in this specification are not necessarily All refer to the same embodiment, but mean "one or more but not all embodiments" unless specifically stated otherwise. The terms "including", "comprising", "having" and variations thereof mean "including but not limited to", unless specifically stated otherwise.

An embodiment of the present application provides a moving iron exciter, which can be applied in audio equipment, so as to excite the audio equipment to produce sound. Wherein, the audio device may be any device capable of outputting audio, such as a mobile phone, a tablet computer, a TV, a large screen, and the like.

The moving iron exciter can be specifically applied in non-porous audio equipment. For example, as shown in FIG. The inner surface is the inner surface of the audio equipment, the moving iron exciter 20 excites the sounding body 10 to vibrate, and the sounding body 10 vibrates to generate sound waves to produce sound.

Wherein, the sounding body 10 may specifically be a display screen of an audio device, or a casing of the audio device, etc., which is not limited in this embodiment, and the sounding body 10 may be used as an example for a display screen. Among them, the casing of the audio device is a casing used to encapsulate and protect the internal components of the audio device. For example, if the audio device is a mobile phone, the casing may include a rear cover and a middle frame, wherein the rear cover and the display screen are positioned opposite each other, and the middle frame Frames are located around the display.

In this way, the non-porous design of the sounding body 10 of the audio equipment can be realized, wherein the non-porous sounding body 10 has better sealing performance and better waterproof and dustproof performance.

Of course, the moving iron exciter can also be applied to perforated audio equipment, but perforated audio equipment usually uses a moving coil speaker.

Among them, the difference between the moving iron exciter and the moving coil speaker is that the moving iron exciter vibrates its magnetic parts (such as magnets) to drive the display screen to vibrate and make sound, and the moving coil speaker vibrates its voice coil to drive the speaker diaphragm to vibrate Vocalization, the sound travels outwards from the opening.

Also used in non-porous audio equipment, the sound effect of the moving iron exciter is better than that of the moving coil speaker. This is because, in the moving iron exciter, the magnetic part with larger mass vibrates stronger in the vibration, and it is easier to drive the display to vibrate, so the loudness of the display is louder and the sound effect is better. As for the moving coil speaker, the voice coil with a smaller mass vibrates weaker in the vibration, and it is not easy to drive the display to vibrate. Even if it drives the display to vibrate, the loudness of the sound is relatively small, so the sound effect is poor.

Wherein, the present application does not limit whether the moving iron exciter is applied in a non-porous audio device or in a perforated audio device, and the application in a non-porous audio device can be used as an example.

Figure 2 is a schematic diagram of the explosion structure of the moving iron actuator, Figure 3 is a schematic structural diagram of the housing 1 and the suspension 4 of the moving iron actuator, and Figure 4 is a schematic structural diagram of the moving iron actuator after installation, Figure 3 5 is a schematic diagram cut along A-A in FIG. 4 . For ease of reading, the reference numerals in FIGS. 2 to 5 are described as follows.

Wherein, as shown in Fig. 2 and Fig. 3, there are multiple voice coils 2, magnetic parts 3, and suspension parts 4. For the convenience of distinction, the voice coil 2 located inside can be recorded as an inner voice coil, and used 2a mark, mark the outer voice coil 2 as the outer voice coil, and use the 2b mark, but it is understandable that 2, 2a and 2b all indicate the voice coil, except that 2a further indicates the inner voice coil, and 2b further indicates the outer voice lock up. Similarly, the magnetic part 3 located inside can be recorded as an inner magnetic part and marked with 3a, and the magnetic part 3 located outside can be marked as an outer magnetic part and marked with 3b. It can be understood that 3, 3a and 3b Both represent magnetic parts, except that 3a further represents an inner magnetic part, and 3b further represents an outer magnetic part.

Similarly, as shown in FIG. 3 and with reference to FIG. 2 , the suspension 4 connected between the first surface (such as the upper surface) of the magnetic member 3 and the first surface of the housing 1 can be referred to as the first suspension, and Using 41 marks, further, the first hanging part 41 connected to the inner magnetic part 3a can be marked as the first inner hanging part, and the mark 41a can be used to mark the first hanging part 41 connected to the outer magnetic part 3b as the first hanging part 41. Outer suspension and marked with 41b.

Similarly, the suspension 4 connected between the second surface (the following surface) of the magnetic piece 3 and the second surface of the housing 1 can be recorded as the second suspension, and marked with 42, and further, the connection inside The second hanging part 42 of the magnetic part 3a is marked as the second inner hanging part and marked with 42a, and the second hanging part 42 connected with the outer magnetic part 3b is marked as the second outer hanging part and marked with 42b.

Wherein, the above representations of the voice coil, the magnetic part and the suspension part are also applicable to other drawings of this embodiment.

As shown in FIGS. 2 and 3 , the moving iron exciter includes a housing 1 , multiple voice coils 2 , multiple magnetic components 3 and multiple suspension components 4 . Wherein, the housing 1 plays the role of fixing the voice coil 2, the magnetic element 3 and the suspension element 4, and may include a first surface and a second surface arranged backwards, for example, the first surface and the second surface are opposite to each other. When the moving iron exciter is installed in the audio equipment, the housing 1 of the moving iron exciter 1 is connected with the sounding body 10 (such as the display screen) of the audio equipment, for example, the outer surface of the first side of the housing 1 or the second The outer surface of the surface is connected with the sounding body 10.

Wherein, the voice coil 2 can also be referred to as a coil, and its shape is ring-shaped, which plays the role of generating a changing magnetic field. For example, the voice coil 2 can generate a changing magnetic field when passing a changing current therethrough. The magnetic element 3 located in the voice coil 2 may be a permanent magnet, which has a stable magnetic field around it.

Wherein, the magnetic field directions of the plurality of magnetic parts 3 can be in the same direction, for example, they can all point from one side close to the bottom of the housing 1 to the opposite side close to the top of the housing 1 . For another example, it can be directed from the side close to the top of the housing 1 to the opposite side close to the bottom of the housing 1 .

Among them, the suspension part 4 has elasticity, and the magnetic part 3 is suspended in the voice coil 2, so that the connected magnetic part 3 can vibrate up and down relative to the voice coil 1. When the magnetic part 3 vibrates up and down, the connected suspension part 4 also follows. vibration, and then the housing 1 connected to the suspension part 4 will also vibrate, and the housing 1 is connected with the sounding body 10, thereby driving the sounding body 10 to vibrate.

As shown in FIG. 4 with reference to FIG. 5 , each voice coil 2 is connected to the housing 1 . Each magnetic piece 3 is connected to the housing 1 through a suspension piece 4 , and each magnetic piece 3 is suspended in at least one voice coil 2 . The specific shape of the casing 1 , the specific connection method of the voice coil 2 and the casing 1 , and the specific connection method of the magnetic part 3 and the suspension part 4 will be described in detail below.

Wherein, the magnetic piece 3 is suspended in the voice coil 2, that is, the magnetic piece 3 is suspended in the voice coil 2, and it can also be understood that there is no connection relationship between the magnetic piece 3 and the voice coil 2, and the magnetic piece 3 is suspended in the voice coil 2. In the space surrounded by circle 2.

In one example, each magnetic piece 3 can be suspended on one side, that is, one surface of the magnetic piece 3 is connected to one surface of the housing 1 through the suspension piece 4, that is, the magnetic piece One surface of 3 and one surface of housing 1 are connected by suspension 4 . For example, the first surface of each magnetic piece 3 is connected to the first surface of the housing 1 through the first suspension piece 41 of the plurality of suspension pieces 4 .

Wherein, the quantity of magnetic part 3 is multiple, so, the quantity of first suspension part 41 is also multiple, and magnetic part 3 and first suspension part 41 correspond one-to-one, so, each magnetic part 3 passes through corresponding first suspension part 41. The suspension part 41 is connected with the first surface of the casing 1 .

Then, when the moving iron exciter is applied in audio equipment, since all the first suspension parts 4 are connected to the first surface of the casing 1, then, in order to better transmit the vibration of the magnetic part 3 to the casing 1, Correspondingly, the outer surface of the first surface of the casing 1 is connected with the sounding body 10 of the audio device.

In another example, as shown in FIG. 5 , each magnetic piece 3 can also be suspended on both sides. The member 4 is respectively connected with the first surface and the second surface of the housing 1 opposite to the device. For example, the first surface of the magnetic piece 3 is opposite to the first surface of the housing 1, the second surface of the magnetic piece 3 is opposite to the second surface of the housing 1, and the first surface of each magnetic piece 3, The first suspension 41 in the plurality of suspensions 4 is connected to the first surface of the housing 1, and the second surface of each magnetic member 3 is connected to the housing through the second suspension 41 in the plurality of suspensions 4. The second face of body 1 is connected.

Wherein, the quantity of magnetic part 3 is multiple, so, as shown in Figure 3, the quantity of the first suspension part 41 and the second suspension part 42 are multiple, and the magnetic part 3 corresponds to the first suspension part 41 one by one, The magnetic part 3 is also in one-to-one correspondence with the second suspension part 42, so the first surface of each magnetic part 3 is connected with the first surface of the housing 1 through the corresponding first suspension part 41, and each magnetic part 3 The second surface of the housing 1 is connected to the second surface of the casing 1 through the corresponding second suspension member 42 .

Then, when the moving iron exciter is applied in audio equipment, since the first surface and the second surface of the casing 1 are connected by suspension parts, then, the force balance between the first surface and the second surface, which surface is related to The sounding body 10 of the audio equipment can be connected. And, because each magnetic part 3 is double-sided suspension, so, compared with only one surface connection suspension part, the vibration of the magnetic part 3 in the vertical direction perpendicular to the first surface and the second surface is more stable, Weaken the polarization of the front and rear vibrations or left and right vibrations of the magnetic member 3 . This can reduce the collision between the magnetic part 3 and the voice coil 2, so that the vibration of the magnetic part 3 in the vertical direction is relatively pure, then, the sound that excites the sound emitting body 10 (such as a display screen) to send is also relatively pure, which can weaken murmur.

In this embodiment, whether each magnetic member 3 is suspended on one side or on both sides is not specifically limited. Since the stability of the double-sided suspension is good, the double-sided suspension can be used as an example for illustration.

In one example, each magnetic piece 3 can vibrate relative to the voice coil 2, because the magnetic piece 3 is suspended in the voice coil 2 through the suspension piece 4, then, when the voice coil 2 is fed with a changing current, the voice coil The superimposed magnetic field of the changing magnetic field of 2 and the magnetic field of the magnetic member 3 is also a changing magnetic field. According to the movement of the conductor cutting the magnetic induction line in the changing magnetic field, it can be seen that there is relative movement between the voice coil 2 and the magnetic member 3 . Since the voice coil 2 is connected to the housing 1, and the magnetic part 3 is connected to the housing 1 through the suspension part 4, and the suspension part 4 has elasticity, then the magnetic part 3 can vibrate relative to the voice coil 2 in the voice coil 2 .

Wherein, in the application of the moving iron exciter, by setting the direction of the current in the voice coil 2, the direction of the magnetic induction line in the changing magnetic field, and the left-hand rule, the magnetic part 3 can be set relative to the voice coil 2 and the housing 1 , vibrate up and down along the height direction of the voice coil 2 .

The magnetic utilization rate of the magnetic part 3 of the moving iron exciter is relatively high, this is because the moving iron exciter includes a plurality of voice coils 2 and a plurality of magnetic parts 3, and each magnetic part 3 is located in at least one voice coil 2 . In this way, the distance between each magnetic part 3 and at least one voice coil 2 can be relatively close. Then, the magnetic field at each position of each magnetic part 3 can be superimposed with the magnetic field of at least one voice coil 2, and each magnetic part 3 can be fully utilized. The magnetism of the magnetic part 3 at each position improves the magnetic utilization rate of the magnetic part 3 .

And once the magnetic utilization rate of the magnetic member 3 is improved, the efficiency of the moving iron exciter to excite the sounding body 10 to emit sound can also be improved. This is because the magnetic utilization rate of the moving iron exciter is relatively high, so, inputting a small electric signal (such as current or voltage) to the moving iron exciter can also excite the sounding body 10 to output the audio frequency with the same effect to the outside. The moving iron exciter inputs an electric signal of the same magnitude, but it can excite the sounding body 10 to output better audio. Therefore, the moving iron exciter can improve the sound generation efficiency of the audio equipment.

Regarding the arrangement of multiple voice coils 2 and multiple magnetic components 3 . For example, as shown in FIG. 6 , multiple voice coils 2 may be arranged sequentially from inside to outside. FIG. 6 shows two voice coils 2 , and one voice coil 2 is located in the other voice coil 2 . Of course, the number of voice coils 2 may be more than two, and more than two voice coils 2 are arranged sequentially from inside to outside.

In this embodiment, the number of voice coils 2 is not limited, and two voice coils 2 as shown in FIG. 6 may be used as an example. For ease of introduction, the voice coil 2 located in the inner layer can be marked as the inner voice coil 2a, and the voice coil 2 located in the outer layer can be marked as the outer voice coil 2b.

Wherein, the center lines of the voice coils 2 among the plurality of voice coils 2 may be on the same straight line. The centerline of the voice coil 2 may also be called the central axis of the voice coil 2 , which is a straight line passing through the center of the voice coil 2 and along the height direction of the voice coil 2 . Then, the central lines of multiple voice coils 2 are on the same straight line, which can also be understood as multiple voice coils 2 are coaxially arranged.

For example, as shown in FIG. 6 , the centerline p of the inner voice coil 2a and the centerline q of the outer voice coil 2b are on the same straight line, that is, they coincide.

In order to realize that the magnetic part 3 is located in at least one voice coil 2 each time, correspondingly, as shown in FIG. There are magnetic parts3. That is, among the plurality of magnetic pieces 3 , a part of the magnetic pieces 3 is suspended in the annular space between two adjacent voice coils 2 , and another part of the magnetic pieces 3 is suspended in the innermost voice coil 2 .

The above is an example of two voice coils 2, then, the magnetic piece 3 located in the annular space of the inner voice coil 2a and the outer voice coil 2b can be marked as the outer magnetic piece 3b, and the magnetic piece 3 located in the inner voice coil 2a can be written as It is the inner magnetic part 3a.

As shown in Figure 7, the distance between the inner magnetic part 3a and the inner voice coil 2a is relatively close, and the magnetic fields at various positions of the inner magnetic part 3a are respectively superimposed with the magnetic field of the outer voice coil 2b and the magnetic field of the inner voice coil 2a The strength of each is relatively large, so that the magnetism of the inner magnetic member 3a is fully utilized. Similarly, the outer magnetic part 3b is closer to the outer voice coil 2b and closer to the inner voice coil 2a. Then, the magnetic fields at each position of the outer magnetic part 3b are respectively related to the magnetic field of the outer voice coil 2b and the inner voice coil. The strength of the magnetic field after the superposition of the magnetic field of the coil 2a is also relatively large, so that the magnetism of the outer magnetic part 3b is also fully utilized, thereby improving the magnetic utilization rate of the magnetic part.

Regarding the arrangement of multiple voice coils 2 and multiple magnetic components 3 . For another example, as shown in FIG. 8 , a plurality of voice coils 2 may include a first voice coil 21 and a plurality of second voice coils 22, and a plurality of second voice coils 22 are located in the first voice coil 21, and each of the first voice coils The spaces in the two voice coils 22 do not intersect each other. Continuing to refer to FIG. 8 , a magnetic piece 3 is suspended in the first voice coil 21 and in the space outside all the second voice coils 22 , and a magnetic piece 3 is also suspended in each second voice coil 22 . It can also be understood that a part of the magnetic parts 3 is located in the space inside the first voice coil 21 and outside all the second voice coils 22 , and another part of the magnetic parts 3 is located in each of the second voice coils 22 .

As shown in Figure 8, the distance between the magnetic part 3 in the second voice coil 22 and the second voice coil 22 is relatively close, and the magnetic field at each position of the magnetic part 3 in the second voice coil 22 is respectively related to the surrounding The magnetic field strength of the superimposed magnetic field of the first voice coil 21 and the second voice coil 22 is relatively large, so that the magnetism of the magnetic member 3 in the second voice coil 22 is fully utilized. Similarly, the magnetic member 3 located in the first voice coil 21 and outside the second voice coil 22 is closer to the first voice coil 21 and closer to the second voice coil 22, so the magnetic member The magnetic field at each position of 3 is superimposed with the magnetic field of the first voice coil 21 and the magnetic field of the second voice coil 22 respectively.

It can be seen that whether the plurality of voice coils 2 and the plurality of magnetic elements 3 are arranged as shown in FIG. 7 or in the manner shown in FIG. 8 , the magnetic utilization rate of the magnetic elements 3 can be improved.

Once the magnetic utilization rate of the magnetic part 3 is improved, then, compared with the moving iron actuator comprising a voice coil 2 and a magnetic part 3, the moving iron actuator can be used under an equal input electric signal (such as current or voltage) Next, the sounding body 10 is excited to produce a stronger vibration effect, and the audio frequency with greater intensity is output outward, or, under the action of a small input electrical signal (such as current or voltage), the sounding body can be excited to produce the same vibration effect, Outputs audio of equal intensity outward. It can be seen that the moving iron exciter can excite the sounding body 10 to output louder audio with a smaller input electrical signal, which is beneficial to improve the sounding efficiency of the audio equipment.

Whether the plurality of voice coils 2 and the plurality of magnetic parts 3 of the moving iron exciter are arranged in the manner shown in Figure 7 or in the manner shown in Figure 8, they can be regarded as a plurality of magnetic components. Array arrangement of pieces 3. The multiple magnetic parts 3 of the moving iron exciter are arranged in an array, and compared with the array arrangement of multiple moving iron exciters, the resonant frequency of the moving iron exciter is easy to control.

For example, when designing and processing the moving iron exciter, the resonant frequency of the moving iron exciter can be controlled only by adjusting the suspension 4 connected to each magnetic piece 3 . Wherein, the resonant frequency of the moving iron exciter will be described in detail below.

Among them, this embodiment does not limit the number of voice coils 2, the number of magnetic parts 3, and the specific arrangement of a plurality of voice coils 2 and a plurality of magnetic parts 3, which can meet the requirements of each position of each magnetic part 3. It only needs to superimpose the magnetic fields of the surrounding voice coil 2 respectively.

In this embodiment, in order to facilitate the introduction of the moving iron exciter, as shown in Figure 7, the number of voice coils 2 is two, the number of magnetic parts 3 is two, and the voice coils 2 are sequentially arranged from inside to outside. Arrangement, each voice coil 2 is suspended with a magnetic piece 3 for illustration.

The structural features of the moving iron exciter will be described in detail below, and the features of the housing 1 , the suspension 2 and the magnetic piece 3 will be introduced in sequence.

As for the features of the housing 1 of the moving iron exciter, reference can be made to FIG. 3 . The housing 1 may include two fixing frames 11 and two fixing plates 12 . Wherein, as shown in FIG. 9 , the fixing frame 11 may include a side wall 111 and a lateral frame 112 . As shown in FIG. 9 , the fixing plate 12 is shaped like a zigzag plate, including an outer frame 121 , an inner frame 122 and a connecting frame 123 connecting the outer frame 121 and the inner frame 122 . As shown in Figure 9, the outer frame 121 of a fixed plate 12 and the lateral frame 112 of a fixed frame 11 are fixed to form the upper cover 1A of the housing 1, and the top plate of the upper cover 1A can be the first of the above-mentioned housing 1. one side. The outer frame 121 of the other fixing plate 12 is fixed to the lateral frame 112 of the other fixing frame 11 to form the base 1B of the housing 1 , and the bottom plate of the base 1B can be the second surface of the housing 1 mentioned above. The side wall 111 of the upper cover 1A and the side wall 111 of the base 1B are fastened and fixedly connected to form the casing 1 .

The above is the introduction about the structural features of the housing 1 of the moving iron exciter, and the suspension 4 of the moving iron exciter will be introduced below. Since all of the plurality of suspensions 4 can be the first suspensions 41, or a part can be the first suspensions 41, and the other part can be the second suspensions 42, so, it can be understood that the suspensions 4 described below The structural features are applicable to the first suspension part 41 and the second suspension part 42 described above.

As shown in Figure 10, the suspension 4 is installed in the fixed frame 11, the suspension 4 can include a fixed portion 43 and an elastic arm 44, one end of the elastic arm 44 is connected with the fixed portion 43, and the other end is connected with the lateral frame of the fixed frame 11. 112 connected. The suspension 4 connected to the fixed frame 11, that is, the suspension 4 shown in FIG. As shown in Fig. 2 and Fig. 5, then, the suspension part 4 can be the first outer suspension part 41b or the second outer suspension part 42b.

Similarly, as shown in Figure 11, the inner frame 122 of the fixed plate 12 is also equipped with a suspension 4, the suspension 4 also includes a fixed portion 43 and an elastic arm 44, one end of the elastic arm 44 is connected with the fixed portion 43, and the other end It is connected with the inner frame 122. The suspension member 4 connected to the fixed plate 12, that is, the suspension member 4 shown in FIG. 11, is used to connect with the inner magnetic member 3a in the inner voice coil 2a, as shown in FIGS. The hanger 4 can be the first inner hanger 41a or the second inner hanger 42a.

In one example, the number of elastic arms 44 of each suspension can be one. As shown in FIG. directly connected to the lower surface of the magnetic piece 3. The other end of the elastic arm 44 is connected to the inner surface of the housing 1 , as shown in FIG. 13 .

In another example, the number of elastic arms 44 of each suspension member 4 may also be two, and the positions of the two elastic arms 44 are opposite. In another example, the number of elastic arms 44 can also be more than two, and these elastic arms 44 can be evenly arranged along the fixed part 43, or these elastic arms 44 can be arranged along the fixed part 43 according to the specific shape of the fixed part 43. 43 distribution, for example, as shown in FIG.

Each suspension 4 comprises a fixed part 43 and a plurality of elastic arms 44, and a plurality of elastic arms 44 are fixedly connected with the magnetic part 3 by means of the fixed part 43, so as to facilitate the control of the vibration direction of the magnetic part 3, and it is not easy to cause the magnetic part 3 to be damaged. The vibration deviates greatly from the ideal vibration.

And once the vibration direction of the magnetic part 3 is well controlled, the collision between the magnetic part 3 and the surroundings can be reduced, so that the vibration of the magnetic part 3 in the vibration direction is relatively pure, and then the sound emitted by the excitation sounding body 10 is relatively pure. , can weaken the noise and improve the vibration effect of the sounding body 10 .

As mentioned above, the suspension part 4 is connected to the magnetic part 3 through its fixing part 43, and connected to the housing 1 through its elastic arm 44, which can be understood as follows:

If the magnetic part is suspended on one side, the hanging part 4 connected by the magnetic part 3 is the first hanging part 41, and the first surface of the magnetic part 3 is connected with the fixed part 43 of the first hanging part 41, and the first hanging part 41 The elastic arm 44 is connected to the first surface of the housing 1 .

And if the magnetic part 3 is double-sided suspension, then the hanging part 4 connected by the magnetic part 3 includes the first hanging part 41 and the second hanging part 42, the first surface of the magnetic part 3 and the fixed part 43 of the first hanging part 41 connected, the elastic arm 44 of the first suspension 41 is connected to the first surface of the housing 1, the second surface of the magnetic member 3 is connected to the fixed portion 43 of the second suspension 42, and the elastic arm 44 of the second suspension 42 is connected to the first surface of the housing 1. The second side of the housing 1 is connected.

It should be pointed out that each suspension part 4 may also only include a plurality of elastic arms 44 without the fixing part 43 , and the elastic arms 44 of the suspension part 4 may be directly connected to the magnetic part 3 without the help of the fixing part 43 .

In one example, in order to improve the elasticity of the elastic arms 44, correspondingly, as shown in FIG. 10 and FIG. The length of the elastic arm 44 is extended, and once the length of the elastic arm 44 is extended, the suspended magnetic part 3 can easily vibrate.

For example, as shown in Figure 10, the elastic arm 44 is bent between the lateral frame 112 of the fixed frame 11 and the fixed part 43, and for example, as shown in Figure 11, the elastic arm 44 is bent and positioned between the inner frame 122 of the fixed plate 12 and the Between section 43.

Wherein, this embodiment does not limit the curved shape of the elastic arm 44 , in actual processing, the curved shape of the connected elastic arm 44 can be designed according to the resonant frequency required by each magnetic piece 3 .

Wherein, this embodiment does not limit the specific structure of the suspension member 4 , as long as the magnetic member 3 can be suspended in at least one voice coil 2 and the suspension member 4 has elasticity.

In one example, the suspension part 4 can be integrally formed with the housing 1 , for example, the fixed frame 11 and the suspension part 4 are integrally formed in a connection relationship, and the fixed plate 12 and the suspension part 4 are integrally formed in a connection relationship.

Of course, the suspension part 4 and the casing 1 can also be connected by welding. This embodiment does not limit the specific connection method between the suspension part 4 and the casing 1, as long as the two can be connected.

It should be pointed out that the structural features of the housing 1 and the suspension 4 described above are only examples, and both the housing 1 and the suspension 4 may have other structural features. For example, as shown in FIG. 13 , both the upper cover 1A and the base 1B of the casing 1 may be in a cover-like structure, and the suspension member 4 may be a spring. As shown in Figure 13, the voice coil 2, the magnetic part 3 and the suspension part 4 are all located in the space formed by fastening the upper cover 1A and the base 1B. For example, the top of the outer voice coil 2b is fixed to the upper cover 1A, and the bottom is fixed to the base. 1B is fixed, the top of the inner voice coil 2a is fixed to the upper cover 1A, and the bottom is fixed to the base 1B. The inner magnetic part 3a is located in the inner voice coil 2a, and the first inner suspension part 4a is connected between the upper surface of the inner magnetic part 3a and the top plate of the upper cover 1A, and/or, the lower surface of the inner magnetic part 3a and the base 1B A second inner suspension part 42a is connected between the bottom plates. The outer magnetic part 3b is located in the outer voice coil 2b, and a first outer suspension part 41a is connected between the upper surface of the outer magnetic part 3b and the top plate of the upper cover 1A, and/or, the lower surface of the outer magnetic part 3b and the base 1B A second outer suspension member 42b is connected between the base plates.

Wherein, this embodiment does not limit the specific structural features of the housing 1 and the suspension 4 , as long as the suspension 4 can suspend the magnetic component 3 in the voice coil 2 .

The above is the introduction about the structural features of the housing 1 and the suspension part 4 of the moving iron exciter, and the structural features of the magnetic part 3 will be introduced below.

Regarding the shape of the magnetic part 3, the shape of the magnetic part 3 is related to the position. For example, as shown in FIG. Also for rectangles. For another example, as shown in FIG. 6 , the space between the outer voice coil 2 b and the inner voice coil 2 a is an annular space, then the shape of the outer magnetic member 3 b located in the annular space is annular.

In this embodiment, the shape of each voice coil 2 is not limited, and the shape of each magnetic piece 3 is not limited, as long as each magnetic piece 3 is located in at least one voice coil 2 .

Regarding the structural features of the magnetic pieces 3 , as shown in FIG. 14 , each magnetic piece 3 may include a magnet 31 and two magnetically conductive plates 32 , and the magnet 31 is located between the two magnetically conductive plates 32 .

Wherein, the magnet 31 may be a permanent magnet with a magnetic field around it. The magnetically conductive plate 32 may be a non-magnetic metal plate. The magnetic induction lines in the magnetic field of the magnetic element 3 can be directed from one magnetically conductive plate 32 to the other magnetically conductive plate 32 .

In one example, the magnetically conductive plates 32 play a role in allowing the magnetic induction lines in the magnetic field to accumulate. For example, two magnetically conductive plates 32 respectively located on the upper surface and the lower surface of the magnet 31 can make the magnetic induction lines of the magnet 31 as far as possible. Gather in the voice coil 2 where the magnetic piece 31 is located, so as to enhance the magnetic field strength of the magnet 31 in the voice coil 2 where it is located.

For example, the inner magnetic part 3 located in the inner voice coil 2a, its two magnetically conductive plates 32 can make the magnetic field of the magnet 31 gather in the inner voice coil 2a as much as possible, so as to enhance the magnetic field strength of the magnetic part 3 in the inner voice coil .

For example, the outer magnetic part 3 located in the annular space between the outer voice coil 2b and the inner voice coil 2a, its two magnetic guide plates 32 can make the magnetic field of the magnet 31 gather in the annular space as much as possible, to strengthen the magnetic part 3 Magnetic field strength in the annular space.

In one example, in order to input current into the voice coil 2 of the moving iron exciter, correspondingly, a solution may be that the wires wound by each voice coil 2 can protrude from the casing 1 to access the peripheral circuit.

Another solution may be, as shown in FIG. 15 and with reference to FIG. 16, the moving iron exciter also includes a circuit board 5, wherein the circuit board 5 may specifically be a flexible circuit board, the circuit board 5 is connected to the housing 1, and the voice coil 2 and the circuit board 5 are electrically connected, as shown in FIG. 16 , one end of the circuit board 5 protrudes from the casing 1 to be electrically connected to the peripheral circuit, so that the peripheral circuit can input current to the voice coil 2 through the circuit board 5 .

The foregoing is an introduction to the structural features of the housing 1 , the suspension 4 and the magnetic member 3 of the moving iron exciter.

Based on the above, the assembly process of the moving iron exciter can be, as shown in FIG. 15 and FIG. 16 , a fixing plate 12 of the housing 1 can be fixed with a fixing frame 11 to form the base of the housing 1 . Then, the outer voice coil 2b located on the outer ring can be placed in the fixed frame 11 of the base and connected with the fixed frame 11 . Afterwards, the outer magnetic part 3b on the outer ring can be placed in the outer voice coil 2b and connected to the second outer suspension part 42b on the fixed frame 11 of the base. After that, the inner voice coil 2a located in the inner ring can be placed in the ring of the outer magnetic member 3b, and connected with the inner frame 122 of the fixing plate 12 of the base. Afterwards, the inner magnetic part 3a located in the inner ring can be placed in the inner voice coil 2a, and connected with the second inner suspension part 42a on the fixing plate 12 of the base. Afterwards, another fixing frame 11 can be snapped onto the fixing frame 11 of the base, and the first outer suspension part 41b on the fixing frame 11 is connected to the upper surface of the outer magnetic part 3b. After that, another fixing plate 12 can be fixed on the upper fixing frame 11, and the first inner suspension part 41a on the fixing plate 12 can be fixedly connected with the upper surface of the inner magnetic part 3a. In this way, the moving iron exciter shown in Figure 16 can be assembled.

Wherein, as shown in Figure 15, the structural feature of the circuit board 5 is similar to the structural feature of the fixed plate 12 of the housing 1, the circuit board 5 can be fixed between the fixed frame 11 and the fixed plate 12, for example, can be fixed on the housing 1 between the fixed frame 11 and the fixed plate 12 of the base, also can be fixed between the fixed frame 11 and the fixed plate 12 of the loam cake of housing 1.

It can be seen from the above that each magnetic piece 3 is suspended by one suspension piece 4 on the upper surface and one suspension piece 4 on the lower surface, that is, each magnetic piece 3 is suspended by two suspension pieces 4 . For example, as shown in Figure 16, the first surface (such as the upper surface) of the inner magnetic part 3a is connected by the first inner suspension part 41a, and the second surface (the lower surface) of the inner magnetic part 3a is connected by the second inner suspension part 42a, The first surface (such as the upper surface) of the outer magnetic part 3b is connected by the first outer suspension part 41b, and the second surface (the lower surface) of the outer magnetic part 3b is connected by the second outer suspension part 42b.

The magnetic part 3 is suspended and connected by the suspension part 4 in this way, which can strengthen the vibration of the magnetic part 3 in the vertical direction perpendicular to the horizontal plane, and weaken the left-right vibration or back-and-forth vibration of the magnetic part 3 in the horizontal plane.

Once the left-right or back-and-forth vibration of the magnetic part 3 in the horizontal plane is weakened, the collision between the magnetic part 3 and the voice coil 2 can be reduced, so that the vibration of the magnetic part 3 in the vertical direction is relatively pure. The sound produced is also relatively pure, which can reduce noise.

The above are the structural features and assembly process of the moving iron exciter, and the resonant frequency of the moving iron exciter will be introduced below.

Among them, resonance is also called resonance. When the frequency of external action is the same as or close to the natural frequency of the vibration system, the amplitude of the vibration system increases sharply. The frequency at which resonance occurs is called the resonance frequency.

In one example, the magnetic part 3 and the connected suspension part 4 in the moving iron exciter form a vibration system. Wherein, the suspension part connected with the magnetic part may be the first suspension part, or may include the first suspension part and the second suspension part. For example, if the magnetic part belongs to single-sided suspension, the suspension includes a first suspension, then the magnetic part and the first suspension connected to the first surface of the magnetic part form a vibration system, and if each If a magnetic part belongs to double-sided suspension, the suspension part includes a first suspension part and a second suspension part, then the magnetic part, the first suspension part connected to the first surface of the magnetic part, and the first suspension part connected to the magnetic part The second suspension on the two surfaces constitutes a set of vibration system. In the following, for the convenience of introduction, it can be described as an example that each magnetic part belongs to double-sided suspension.

Since there are multiple magnetic pieces 3 and different suspension pieces 4 connected to different magnetic pieces 3 are also different, then the moving iron exciter includes multiple sets of vibration systems. For example, as shown in Fig. 15 and Fig. 16, the magnetic part 3 includes an outer magnetic part 3b and an inner magnetic part 3a, then the outer magnetic part 3b, the first outer suspension part 41b connecting the upper surface of the outer magnetic part 3b and the outer magnetic part 3b are connected. The second outer suspension member 42b on the lower surface of the member 3b constitutes a vibration system, which can be referred to as an outer vibration system. The inner magnetic part 3a, the first inner suspension part 41a connected to the upper surface of the inner magnetic part 3a and the second inner suspension part 42a connected to the lower surface of the inner magnetic part 3a form another set of vibration system, which can be recorded as the inner vibration system .

Wherein, each vibrating system has a resonant frequency, and the resonant frequency of each vibrating system may be the same or different. For example, the above-mentioned internal vibration system has one resonance frequency, and the external vibration system has one resonance frequency, so that the moving iron exciter has two resonance frequencies, and the two resonance frequencies may be equal or not.

Wherein, since the moving iron exciter includes multiple sets of vibrating systems, and each set of vibrating systems has a resonant frequency, then the equivalent resonant frequency of the moving iron exciter can be the resonant frequency after the synergistic effect of the resonant frequencies of each vibrating system .

In one example, if the resonant frequencies of any two vibrating systems in the multiple vibrating systems of the moving iron exciter are equal, then the equivalent resonant frequency of the moving iron exciter is the resonant frequency of any vibrating system . Compared with a set of vibration system, the moving iron exciter has a larger amplitude at the equivalent resonance frequency, so the loudness emitted by the exciting sounding body is larger, the audio output from the sounding body is louder, and the sound effect is better. .

Then, after the electric signal is input to the moving iron exciter, the vibration direction of each vibration system is the same, the vibration amplitude is equal, and the vibration frequency excited by the input electric signal is close to the equivalent resonance frequency of the moving iron exciter , then, the amplitude of the moving iron exciter reaches the maximum, and the vibration generated by exciting the sounding body is the strongest, the loudness is high, and the effect is good.

In another example, if any two vibration systems in the multiple sets of vibration systems of the moving iron exciter are not equal, and the resonance frequency of one vibration system is located in the attenuation frequency band of the resonance frequency of the other vibration system, then, The frequency band of the equivalent resonance frequency of the moving iron exciter can be widened. Once the frequency band of the equivalent resonant frequency of the moving iron exciter is wider, it is possible to input more frequency currents to the moving iron exciter, and both can excite the sounding body to emit a louder audio frequency, which also broadens the range of The frequency band of the excitation signal input by the moving iron exciter will also promote the moving iron exciter to have a better sounding effect.

Then, after the electric signal is input to the moving iron exciter, the vibration direction of each vibration system is the same, but the vibration amplitude is different. If the vibration frequency excited by the input electrical signal is close to the resonance frequency of the vibration system, then the amplitude of the vibration system will be the largest, and the vibration system will make a greater contribution to stimulating the sounding body to produce sound.

And if there are vibration systems with equal resonant frequencies in the multiple sets of vibration systems of the moving iron exciter, there are also vibration systems with unequal resonant frequencies. If the moving iron exciter includes m+n sets of vibrating systems, the resonant frequencies of any two vibrating systems in m sets of vibrating systems are equal, and are not equal to the resonant frequencies of any set of vibrating systems in n sets of vibrating systems. Any two sets of vibration systems in the vibration system are not equal, and the resonant frequencies of the m+n sets of vibration systems are continuous. Then, m sets of vibration systems are used to increase the amplitude value of the moving iron exciter, and n sets of vibration systems are used to broaden the frequency band of the equivalent resonance frequency of the moving iron exciter, where m and n are both positive integers. In this way, the moving iron exciter can not only excite the sounding body to emit louder audio, but also broaden the frequency band of the excitation signal input to the moving iron exciter.

When processing the moving iron exciter, the resonance frequency of the vibration system can be adjusted by adjusting the suspension 4 in the vibration system, such as adjusting its elasticity and quality. Then, the resonant frequency of each vibrating system can be adjusted according to actual needs to obtain the desired equivalent resonant frequency.

For example, if the desired equivalent resonance frequency is a high frequency, then the resonance frequency of each vibration system in multiple sets of vibration systems can be adjusted so that the equivalent resonance frequency is a high frequency, then the moving iron exciter can excite the sound The body emits high-frequency audio.

For another example, if the desired equivalent resonance frequency is low frequency, then the resonance frequency of each vibration system in multiple sets of vibration systems can be adjusted so that the equivalent resonance frequency is a low frequency frequency, then the moving iron exciter can excite the sounding body Emits low frequency tones.

Of course, if the desired equivalent resonance frequency includes both high frequency and low frequency, then the resonance frequency of each vibration system in multiple vibration systems can also be adjusted so that part of the equivalent resonance frequency is high frequency, and the other part is equivalent to The resonant frequency is low frequency, so the moving iron exciter can not only excite the sounding body to emit high-frequency audio, but also excite the sounding body to emit low-frequency audio.

In the solution described in the present application, the moving iron exciter includes a plurality of voice coils and a plurality of magnetic parts, and each magnetic part is located in at least one voice coil. In this way, the distance between each magnetic part and at least one voice coil can be relatively close. Then, the magnetic field at each position of each magnetic part can be superimposed with the magnetic field of at least one voice coil, and it is possible to make full use of each magnetic part in each position. The magnetism at the position, thereby improving the magnetic utilization rate of the magnetic parts.

In addition, the suspension parts connected to each magnetic part of the moving iron exciter are independent of each other and are not connected to each other. Then, each magnetic part and the connected suspension parts can form a set of vibration system, so that the moving iron exciter A plurality of mutually independent vibration systems may be included, and each vibration system has a resonant frequency, so that the moving iron exciter includes a plurality of resonant frequencies. Then the resonant frequency of each vibrating system can be adjusted to make the frequency band of the equivalent resonant frequency of the moving iron exciter wider, and/or increase the amplitude of the moving iron exciter at the equivalent resonant frequency. Wherein, the resonant frequency of each vibration system can be adjusted by adjusting the characteristics of the suspension parts of each vibration system.

This embodiment also provides an audio device, such as a mobile phone and a tablet computer, etc., as shown in Figure 1, the audio device includes a sounding body 10 and the above-mentioned moving iron exciter 20, and the moving iron exciter 20 is fixed On the inner surface of the sounding body 10 inside the audio device.

Wherein, the sounding body 10 may be the display screen of the audio device, or the casing of the audio device, such as the middle frame of the audio device.

The moving iron exciter included in the audio equipment includes a plurality of voice coils and a plurality of magnetic parts, and each magnetic part is located in at least one voice coil. In this way, the distance between each magnetic part and at least one voice coil can be relatively close. Then, the magnetic field at each position of each magnetic part can be superimposed with the magnetic field of at least one voice coil, and it is possible to make full use of each magnetic part in each position. The magnetism at the position, thereby improving the magnetic utilization rate of the magnetic parts.

Once the magnetic utilization rate of the magnetic parts is improved, then, inputting a small electrical signal (such as current or voltage) to the moving iron exciter can also excite the sounding body to output the audio with the same effect, and input the same effect to the moving iron exciter. Large and small electrical signals can encourage the sounding body to output better audio, so the magnetic utilization rate of the magnetic parts is improved, which can improve the sounding efficiency of the audio equipment.

In addition, the suspension parts connected to each magnetic part of the moving iron exciter are independent of each other and are not connected to each other. Then, each magnetic part and the connected suspension parts can form a set of vibration system, so that the moving iron exciter Including a plurality of mutually independent vibrating systems, then the resonant frequency of each vibrating system can be adjusted so that the frequency band of the equivalent resonant frequency of the moving iron exciter is wider, and/or, the moving iron exciter is increased in equivalent The amplitude at the resonant frequency. Wherein, the resonant frequency of each vibration system can be adjusted by adjusting the characteristics of the suspension parts of each vibration system.

The above description is only an embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the principles of the present application shall be included within the protection scope of the present application.

Claims

A moving iron exciter, characterized in that the moving iron exciter includes a casing (1), a plurality of voice coils (2), a plurality of magnetic parts (3) and a plurality of suspension parts (4), the The casing (1) includes a first surface and a second surface arranged opposite to each other, and the plurality of suspension elements (4) include at least a first suspension element (41);

Each voice coil (2) is connected with the housing (1), and each magnetic part (3) is connected to the first suspension part (41) of the housing (1) through the corresponding first suspension part (41). surface connection, and each magnetic piece (3) is suspended in at least one voice coil (2).
The moving iron exciter according to claim 1, characterized in that, the plurality of voice coils (2) are arranged sequentially from inside to outside;

A part of the magnetic part (3) is suspended in the annular space between two adjacent voice coils (2), and another part of the magnetic part (3) is suspended in the innermost voice coil (2).
The moving iron exciter according to claim 2, characterized in that, the center lines of each voice coil (2) among the plurality of voice coils (2) are on the same straight line.
The moving iron exciter according to claim 1, characterized in that, the plurality of voice coils (2) comprise a first voice coil (21) and a plurality of second voice coils (22), and the plurality of second voice coils (22) The voice coils (22) are all located in the first voice coil (21), and the spaces in the second voice coils (22) are disjoint;

A part of the magnetic parts (3) is suspended in the space inside the first voice coil (21) and outside all the second voice coils (22), and another part of the magnetic parts (3) is respectively suspended in the space of each second voice coil ( 22).
The moving iron exciter according to any one of claims 1 to 4, characterized in that, each magnetic member (3) includes a first surface and a second surface oppositely arranged, and the first surface and the second The surfaces respectively correspond to the first surface and the second surface, and the suspension (4) further includes a second suspension (42);

The first surface is connected to the first surface through the first suspension (41), and the second surface is connected to the second surface through the second suspension (42).
The moving iron exciter according to any one of claims 1 to 5, characterized in that each suspension (4) includes a fixed portion (43) and an elastic arm (44);

One end of the elastic arm (44) of each suspension (4) is connected to the fixing part (43), and the other end is connected to the housing (1);

Each magnetic piece (3) is connected with the corresponding fixing portion (43) of the suspension piece (4).
The moving iron exciter according to claim 6, characterized in that the number of elastic arms (44) of each suspension (4) is multiple, along the fixed portion (43) of the suspension (4) distribution around.
The moving iron exciter according to claim 6 or 7, characterized in that, the shape of the elastic arm (44) of each suspension (4) is a bar shape, and the bending is located between the housing (1) and the fixed between parts (43).
The moving iron exciter according to any one of claims 1 to 8, characterized in that the suspensions (4) connecting different magnetic pieces (3) are not connected to each other, each magnetic piece (3) and the connected suspension (4) A set of vibration systems is formed, and the resonant frequency of each vibration system is different.
The moving iron exciter according to claim 9, characterized in that, among the two sets of vibration systems with different resonance frequencies, the resonance frequency of one set of vibration systems is located at the same time as the resonance frequency of the other vibration system. Attenuation band.
The moving iron exciter according to any one of claims 1 to 10, characterized in that, the magnetic piece (3) includes a magnet (31) and two magnetically conductive plates (32), and the magnet (31) is located at the Between the above two magnetically conductive plates (32).
The moving iron exciter according to any one of claims 1 to 11, characterized in that, the moving iron exciter also includes a circuit board (5), and the circuit board (5) is connected to the casing (1) , the voice coil (2) is electrically connected to the circuit board (5).
An audio device, characterized in that the audio device comprises a sounding body (10) and the moving iron exciter (20) according to any one of claims 1 to 12, the moving iron exciter (20) and the moving iron exciter (20) The inner surface of the sounding body (10) inside the audio device is connected.
The audio device according to claim 13, characterized in that, the sound emitting body (10) is a display screen or a middle frame.