A loudspeaker and electronic device

Abstract

This disclosure relates to a loudspeaker and an electronic device. The loudspeaker includes a vibration system and a magnetic circuit system. The magnetic circuit system includes an electromagnet, which provides a magnetic field to cause the vibration system to vibrate and produce sound. The strength of the magnetic field generated by the electromagnet is positively correlated with the intensity of the current flowing through it. In this embodiment, a sufficiently large current can be passed through the electromagnet to generate a stronger magnetic field than that of a permanent magnet in the prior art, thereby generating a stronger Ampere force to drive the vibration system to vibrate and improving the loudspeaker's external sound performance. In addition, a variable magnetic field can be generated when the intensity of the current flowing through the electromagnet changes. The magnetic field strength can be adaptively adjusted according to the length of the magnetic field lines cut by the vibration system to keep the BL curve uniform, reduce or avoid distortion or noise, and improve the external sound quality of the loudspeaker.

Description

Technical Field

[0001] This disclosure relates to the field of electronic equipment technology, and more particularly to a loudspeaker and an electronic device. Background Technology

[0002] A loudspeaker is a transducer that converts electrical signals into sound signals and is widely used in electronic products such as mobile phones.

[0003] The technology, materials, and structure of the components in loudspeakers have reached a bottleneck, making it difficult to further improve performance through adjustments. As users' demands for external sound quality increase, loudspeakers in related technologies are gradually failing to meet user needs. Utility Model Content

[0004] To overcome the problems existing in the related technologies, this disclosure provides a loudspeaker and an electronic device.

[0005] According to a first aspect of this disclosure, a loudspeaker is provided, comprising:

[0006] Vibration system;

[0007] A magnetic circuit system includes an electromagnet, which provides a magnetic field to cause the vibration system to vibrate and produce sound in the magnetic field;

[0008] The magnetic field strength generated by the electromagnet is positively correlated with the current intensity flowing through the electromagnet.

[0009] In some embodiments, the magnetic circuit system includes a first magnetic circuit system and a second magnetic circuit system, with the first magnetic circuit system and the second magnetic circuit system respectively disposed on both sides of the vibration system along the vibration direction of the vibration system.

[0010] In some embodiments, the vibration system includes a connected diaphragm and a voice coil;

[0011] The magnetic circuit system includes a central magnet and side magnets. Along the vibration direction of the vibration system, the central magnet is directly opposite the middle region of the diaphragm, and the side magnets are directly opposite the edge region of the diaphragm. The voice coil is disposed between the central magnet and the side magnets.

[0012] Wherein, the central magnet and / or the side magnet are electromagnets.

[0013] In some embodiments, the central magnet is an electromagnet and the side magnets are permanent magnets.

[0014] In some embodiments, the vibration system includes a diaphragm, a first voice coil, and a second voice coil;

[0015] The first voice coil is connected to the side of the diaphragm facing the first magnetic circuit system, and the second voice coil is connected to the side of the diaphragm facing the second magnetic circuit system.

[0016] In some embodiments, the diaphragm includes a diaphragm body and a diaphragm dome stacked together;

[0017] The first voice coil is disposed on the side of the diaphragm body opposite to the diaphragm dome and is connected to the diaphragm body; the second voice coil is disposed on the side of the diaphragm dome opposite to the diaphragm body and is connected to the diaphragm dome.

[0018] In some embodiments, a reinforcing sheet is disposed between the first voice coil and the diaphragm.

[0019] In some embodiments, the speaker includes a housing, the sidewalls of which are provided with sound outlet channels.

[0020] According to a second aspect of this disclosure, an electronic device is provided, including a speaker as described in the first aspect.

[0021] In some embodiments, the electronic device further includes:

[0022] The driving unit is electrically connected to the electromagnet of the speaker;

[0023] The control unit is electrically connected to the drive unit. The control unit is used to control the current output by the drive unit to the electromagnet according to the audio signal, so that the electromagnet generates a variable magnetic field.

[0024] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects: a sufficiently large current can be passed through the electromagnet to generate a stronger magnetic field than that of the permanent magnet in the related art, so that the electromagnet generates a stronger Ampere force to drive the vibration system to vibrate, thereby improving the external playback performance of the speaker; in addition, a variable magnetic field can be generated when the current intensity passed through the electromagnet changes, and the magnetic field strength can be adaptively adjusted according to the length of the magnetic field lines cut by the vibration system, so that the BL curve remains uniform, reducing or avoiding distortion or noise, and improving the external playback sound quality of the speaker.

[0025] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0026] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0027] Figure 1 This is a schematic diagram of a loudspeaker according to an exemplary embodiment.

[0028] Figure 2 This is an exploded view of a loudspeaker according to an exemplary embodiment.

[0029] Figure 3 yes Figure 1 Cross-sectional view along the AA direction. Detailed Implementation

[0030] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0031] In related technologies, permanent magnets are typically used inside loudspeakers to provide a magnetic field. However, the limited magnetic field strength generated by permanent magnets restricts the loudspeaker's maximum sound performance. Furthermore, the magnetic field strength generated by permanent magnets remains constant in the short term. As the voice coil drives the diaphragm to vibrate, the length of the magnetic field lines cut by the voice coil changes continuously, resulting in an uneven black-and-white (BL) curve. This leads to sound distortion or the presence of unwanted noise in the sound emitted by the loudspeaker. Moreover, the magnetism of permanent magnets can weaken or even disappear due to temperature changes, mechanical damage, corrosion, and other acoustic variations, affecting the loudspeaker's performance, application scenarios, and lifespan.

[0032] To address the aforementioned technical problems, this disclosure provides a loudspeaker and an electronic device. The loudspeaker includes a vibration system and a magnetic circuit system. The magnetic circuit system includes an electromagnet, which provides a magnetic field to cause the vibration system to vibrate and produce sound. The strength of the magnetic field generated by the electromagnet is positively correlated with the intensity of the current flowing through it. In this embodiment, a sufficiently large current can be passed through the electromagnet to generate a stronger magnetic field than that of permanent magnets in related technologies. This allows the electromagnet to generate a stronger Ampere force to drive the vibration system, improving the loudspeaker's external sound performance. Furthermore, the variable magnetic field can be generated when the current intensity changes in the electromagnet. The magnetic field strength can be adaptively adjusted according to the length of the magnetic field lines cut by the vibration system to keep the BL curve uniform, reduce or avoid distortion or noise, and improve the loudspeaker's external sound quality.

[0033] According to an exemplary embodiment, such as Figures 1 to 3 As shown, this embodiment provides a speaker 10, which is applied to electronic devices, including but not limited to smartphones, tablets, laptops, MP3 players, MP4 players, and smart wearable devices.

[0034] like Figure 2As shown, the loudspeaker 10 includes a vibration system 11 and a magnetic circuit system 12. The magnetic circuit system 12 can provide power to the vibration system 11 so that the vibration system 11 produces rhythmic vibrations to generate sound.

[0035] See Figure 2 The magnetic circuit system 12 includes an electromagnet 121 for generating a magnetic field. The magnetic field can generate an Ampere force with a specific component in the vibration system 11 (such as the voice coil 112, which is described in detail later). The Ampere force drives the vibration system 11 to vibrate so that the loudspeaker 10 emits sound.

[0036] It should be noted that the magnitude of the Ampere force is affected by the magnetic field strength. For example, the magnetic field strength generated by the electromagnet 121 is positively correlated with the current strength flowing through the electromagnet 121.

[0037] The vibration intensity of the vibration system 11 is affected by the magnitude of the Ampere force. Therefore, in the speaker 10 provided in this embodiment, the magnetic field strength can be controlled by adjusting the current to make the electromagnet 121 generate a stronger magnetic field than the permanent magnet, thereby generating a stronger Ampere force. This allows the vibration system 11 to more effectively drive the air to vibrate, thereby improving the performance of the speaker 10.

[0038] Furthermore, when a specific component (such as voice coil 112) is in different positions in the magnetic field, the length L of the cut magnetic field lines varies, resulting in an uneven BL curve. The sound emitted by the speaker 10 with an uneven BL curve is distorted or has noise, meaning that the external sound quality of the speaker 10 or electronic devices using the speaker 10 is not high. In the magnetic circuit system 12 provided in this embodiment, an electromagnet 121 is used to form a magnetic field. The magnetic field strength B generated by the electromagnet 121 is affected by the intensity of the current. For example, the length L of the cut magnetic field lines can be determined according to the position of the specific component in the magnetic field. When the specific component moves to a position where the length L of the cut magnetic field lines is longer, the current intensity input to the electromagnet 121 can be appropriately increased. When the specific component moves to a position where the length L of the cut magnetic field lines is shorter, the current intensity input to the electromagnet 121 can be appropriately decreased. This keeps the product of the magnetic field strength B and the length L of the cut magnetic field lines (i.e., the BL curve) uniform, thereby reducing or avoiding distortion and noise, and improving the external sound quality of the speaker 10 and electronic devices using the speaker 10.

[0039] This embodiment does not limit the specific structure of the electromagnet 121, as long as it can generate a magnetic field in a specific direction. For example, see [reference needed]. Figure 3 The electromagnet 121 includes an iron core 1211 and a coil 1212 surrounding the iron core 1211.

[0040] In this embodiment, a sufficiently large current can be passed through the electromagnet to generate a stronger magnetic field than that of a permanent magnet in related technologies, so that the electromagnet generates a stronger Ampere force to drive the vibration system to vibrate, thereby improving the speaker's external playback performance. In addition, the variable magnetic field can be generated when the current intensity passed through the electromagnet changes, and the magnetic field strength can be adaptively adjusted according to the length of the magnetic field lines cut by the vibration system, so that the BL curve remains uniform, reducing or avoiding distortion or noise, and improving the speaker's external sound quality.

[0041] Furthermore, the electromagnet 121 generates current as long as it is energized, and there is no problem of the permanent magnet 122 weakening or disappearing, which helps to extend the service life of the speaker 10.

[0042] In one exemplary embodiment, such as Figures 1 to 3 As shown, this embodiment provides a loudspeaker 10, which includes a vibration system 11 and a magnetic circuit system 12. The magnetic circuit system 12 includes an electromagnet 121, which provides a magnetic field to make the vibration system 11 vibrate and produce sound. The magnetic field strength formed by the electromagnet 121 is positively correlated with the current intensity flowing through the electromagnet 121.

[0043] Among them, such as Figure 2 As shown, the vibration system 11 includes a connected diaphragm 111 and voice coil 112. The diaphragm 111 and voice coil 112 are connected by means such as adhesive bonding. A signal current can be passed through the voice coil 112 to generate an Ampere force with the electromagnet 121. After being affected by the Ampere force, the voice coil 112 can drive the diaphragm 111 to deform at a certain speed, that is, drive the diaphragm 111 to vibrate. The vibration of the diaphragm 111 drives the air to vibrate, thereby producing sound. See reference. Figure 2 and Figure 3 The magnetic circuit system 12 includes a central magnet and side magnets. Along the vibration direction of the vibration system 11, the central magnet faces the middle region of the diaphragm 111, and the side magnets face the edge region of the diaphragm 111. The voice coil 112 is disposed between the central magnet and the side magnets, so that the central magnet and the side magnets can simultaneously provide Ampere force to the voice coil 112 to enhance the vibration performance of the voice coil 112.

[0044] In this embodiment, both the central magnet and the side magnets can be electromagnets.

[0045] In one example, see Figure 2 and Figure 3 The central magnet is an electromagnet 121, and the side magnets are permanent magnets 122.

[0046] In another example (not shown in the attached diagram), the central magnet is a permanent magnet and the side magnets are electromagnets.

[0047] In yet another example (not shown in the attached diagram), both the central magnet and the side magnets are permanent magnets.

[0048] In some embodiments, such as Figure 2 and Figure 3 As shown, magnetic conductive sheets 123 are provided on the side of the central magnet and the side magnet facing the vibration system 11.

[0049] In one exemplary embodiment, such as Figures 1 to 3 As shown, this embodiment provides a loudspeaker 10, which includes a vibration system 11 and a magnetic circuit system 12. The magnetic circuit system 12 includes an electromagnet 121, which provides a magnetic field to make the vibration system 11 vibrate and produce sound. The magnetic field strength formed by the electromagnet 121 is positively correlated with the current intensity flowing through the electromagnet 121.

[0050] The speaker 10 provided in this embodiment may include any structure or device of the speaker 10 provided in the above embodiments.

[0051] Among them, such as Figure 2 and Figure 3 As shown, the magnetic circuit system 12 includes a first magnetic circuit system 12a and a second magnetic circuit system 12b, along the vibration direction of the vibration system 11. Figure 3 As shown in the z-direction, the first magnetic circuit system 12a and the second magnetic circuit system 12b are respectively disposed on both sides of the vibration system 11. The first magnetic circuit system 12a and the second magnetic circuit system 12b can simultaneously provide Ampere force to the vibration system 11 in the same direction to enhance the vibration performance of the vibration system 11. For example, opposite currents can be input to the electromagnets 121 of the first magnetic circuit system 12a and the second magnetic circuit system 12b respectively, so that the first magnetic circuit system 12a and the second magnetic circuit system 12b generate opposite magnetic fields, thereby providing Ampere force in the same direction to the vibration system 11 at the same time.

[0052] Among them, such as Figure 3 As shown, the voice coil 112 of the vibration system 11 includes a first voice coil 112a and a second voice coil 112b. The first voice coil 112a is connected to the side of the diaphragm 111 facing the first magnetic circuit system 12a, and the second voice coil 112b is connected to the side of the diaphragm 111 facing the second magnetic circuit system 12b.

[0053] See Figure 2 and Figure 3 The diaphragm 111 includes a diaphragm body 1111 and a diaphragm dome 1112 stacked together. The diaphragm dome 1112 is located in the middle region of the diaphragm body 1111. The diaphragm dome 1112 is an auxiliary unit for high-frequency sound generation in the diaphragm 111, which can prevent the diaphragm 111 from generating segmented vibrations in the high-frequency range, thus helping to extend the bandwidth of the speaker 10. (Continue reading...) Figure 3The first voice coil 112a is disposed on the side of the diaphragm body 1111 opposite to the diaphragm dome 1112 and connected to the diaphragm body 1111. The second voice coil 112b is disposed on the side of the diaphragm dome 1112 opposite to the diaphragm body 1111 and connected to the diaphragm dome 1112. This arrangement allows the first voice coil 112a to provide thrust to the diaphragm body 1111 and indirectly drive the diaphragm dome 1112 to vibrate. Compared to setting the first voice coil 112a to push the diaphragm dome 1112 and pull the diaphragm body 1111 through the diaphragm dome 1112, this arrangement effectively prevents the diaphragm body 1111 from separating from the diaphragm dome 1112, thus extending the service life of the diaphragm 111. Based on the same principle as above, the second voice coil 112b located on the other side of the diaphragm 111 provides a thrust to the diaphragm dome 1112 and then transmits the force to the diaphragm body 1111, instead of directly pushing the diaphragm body 1111. This can also effectively prevent the diaphragm body 1111 from separating from the diaphragm dome 1112.

[0054] In some embodiments, such as Figure 3 As shown, a reinforcing plate 113 is provided between the first voice coil 112a and the diaphragm 111. One side of the reinforcing plate 113 is connected to the first voice coil 112a, and the other side of the reinforcing plate 113 is connected to the diaphragm body 1111. The reinforcing plate 113 effectively prevents [something from happening]. The reinforcing plate 113 can be made of metal, composite materials, etc. It is understood that when the outer contour of the first voice coil 112a is smaller than the size of the diaphragm dome 1112, by providing a reinforcing plate 113 with an outer contour larger than that of the first voice coil 112a, the first voice coil 112a of any size can be connected to the diaphragm body 1111.

[0055] Among them, see Figure 2 and Figure 3 The loudspeaker 10 also includes a housing 13, which defines the mounting space for the vibration system 11 and the magnetic circuit system 12. The housing 13 is, for example, rectangular (see...). Figure 1 (Disc-shaped or irregularly shaped, etc.) See further details. Figure 3 When the loudspeaker 10 is provided with two magnetic circuit systems 12, the sound outlet channel 13a of the loudspeaker 10 can be opened on the side wall of the housing 13. The sound outlet channel 13a penetrates the side wall along the thickness direction of the side wall of the housing 13 so that the diaphragm 111 can communicate with the external environment.

[0056] In one example, see Figure 2 and Figure 3The housing 13 includes a top cover 131, a middle frame 132, and a bottom shell 133 stacked together. A first magnetic circuit system 12a is disposed on the top cover 131, a vibration system 11 is disposed on the middle frame 132, and a second magnetic circuit system 12b is disposed on the bottom shell 133. For example, the first magnetic circuit system 12a can be assembled with the top cover 131 first, then the vibration system 11 can be assembled with the middle frame 132, and then the second magnetic circuit system 12b can be assembled with the bottom shell 133. In this embodiment, the housing 13 is made modular, which helps to improve assembly efficiency.

[0057] According to an exemplary embodiment of this disclosure, this embodiment provides an electronic device (not shown in the accompanying drawings), which includes, but is not limited to, smartphones, tablets, laptops, MP3 players, MP4 players, and smart wearable devices. The electronic device utilizes a speaker 10 provided in any of the foregoing embodiments of this disclosure. The speaker 10 includes at least a vibration system 11 and a magnetic circuit system 12. An electromagnet 121 for generating a magnetic field is provided in the magnetic circuit system 12. The strength of the generated magnetic field can be adjusted by regulating the current intensity input to the electromagnet 121, thereby regulating the Ampere force between the magnetic circuit system 12 and the vibration system 11, and making the BL curve more uniform, thereby improving the external sound quality of the electronic device.

[0058] In some embodiments, the electronic device further includes an electrically connected drive unit and a control unit. The drive unit is such as the battery of the electronic device, and the control unit is such as a system on chip (SoC) or a chip dedicated to controlling audio playback. The control unit can control the drive unit to output a current of corresponding strength to the electromagnet 121 according to the frequency of the audio signal to be output, so that the electromagnet 121 generates a magnetic field of sufficient and variable strength, thereby keeping the BL curve of the speaker 10 uniform, reducing and avoiding sound distortion and noise, and improving the external sound quality of the electronic device.

[0059] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the embodiments disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0060] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A loudspeaker, characterized by include: Vibration system; A magnetic circuit system includes an electromagnet, which provides a magnetic field to cause the vibration system to vibrate and produce sound in the magnetic field; The magnetic field strength generated by the electromagnet is positively correlated with the current intensity flowing through the electromagnet. The magnetic circuit system includes a first magnetic circuit system and a second magnetic circuit system, which are respectively located on both sides of the vibration system along the vibration direction of the vibration system.

2. The loudspeaker of claim 1, wherein, The vibration system includes a connected diaphragm and a voice coil; The magnetic circuit system includes a central magnet and side magnets. Along the vibration direction of the vibration system, the central magnet is directly opposite the middle region of the diaphragm, and the side magnets are directly opposite the edge region of the diaphragm. The voice coil is disposed between the central magnet and the side magnets. Wherein, the central magnet and / or the side magnet are electromagnets.

3. The loudspeaker of claim 2, wherein, The central magnet is an electromagnet, and the side magnets are permanent magnets.

4. The loudspeaker of claim 1, wherein, The vibration system includes a diaphragm, a first voice coil, and a second voice coil; The first voice coil is connected to the side of the diaphragm facing the first magnetic circuit system, and the second voice coil is connected to the side of the diaphragm facing the second magnetic circuit system.

5. The loudspeaker according to claim 4, characterized in that, The diaphragm includes a diaphragm body and a diaphragm dome stacked together; The first voice coil is disposed on the side of the diaphragm body opposite to the diaphragm dome and is connected to the diaphragm body; the second voice coil is disposed on the side of the diaphragm dome opposite to the diaphragm body and is connected to the diaphragm dome.

6. The loudspeaker according to claim 4 or 5, characterized in that, A reinforcing sheet is provided between the first voice coil and the diaphragm.

7. The loudspeaker according to claim 1, characterized in that, The speaker includes a housing, and the side wall of the housing is provided with a sound outlet channel.

8. An electronic device, characterized in that, Includes the loudspeaker as described in any one of claims 1-7.

9. The electronic device according to claim 8, characterized in that, The electronic device also includes: The driving unit is electrically connected to the electromagnet of the speaker; The control unit is electrically connected to the drive unit. The control unit is used to control the current output by the drive unit to the electromagnet according to the audio signal, so that the electromagnet generates a variable magnetic field.

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