Loudspeaker and electronic equipment

Abstract

The utility model discloses a loudspeaker and electronic equipment, and belongs to the technical field of electronics. The loudspeaker comprises a magnetic circuit assembly, a first coil, a second coil, a vibrating diaphragm and a vibrating diaphragm support. The magnetic circuit assembly has a magnetic circuit gap in which a magnetic field exists. One end of the diaphragm support is connected with the magnetic circuit assembly, and the other end is connected with the diaphragm. One end of the first coil is connected with the surface, facing the magnetic circuit assembly, of the vibrating diaphragm, and the other end is suspended in the magnetic circuit gap. And the second coil is mounted on the surface of the vibrating diaphragm deviating from the magnetic circuit assembly. According to the technical scheme, the driving force of the loudspeaker can be increased, and then the sensitivity of the loudspeaker is improved.

Description

Technical Field

[0001] This application relates to the field of electronic technology, and in particular to a loudspeaker and electronic device. Background Technology

[0002] Loudspeakers primarily work by the interaction between an electric current and a magnetic field. This interaction causes the voice coil inside the loudspeaker to move within the magnetic field, cutting through lines of magnetic flux. Consequently, the diaphragm inside the loudspeaker vibrates under the influence of the voice coil, producing sound. In this way, loudspeakers can amplify electrical signals into stronger sound waves, enabling sound to travel long distances.

[0003] In related technologies, the residual magnetic flux density of the magnet and the number of turns of the voice coil in the loudspeaker are relatively small, which leads to a smaller driving force factor of the loudspeaker and consequently a lower sensitivity of the loudspeaker. Utility Model Content

[0004] In view of this, embodiments of this application provide a loudspeaker and an electronic device that can increase the driving force of the loudspeaker, thereby improving the sensitivity of the loudspeaker.

[0005] In a first aspect, embodiments of this application provide a loudspeaker, the loudspeaker including a magnetic circuit assembly, a first coil, a second coil, a diaphragm, and a diaphragm support;

[0006] The magnetic circuit assembly has a magnetic circuit gap, and a magnetic field exists within the magnetic circuit gap;

[0007] One end of the diaphragm support is connected to the magnetic circuit assembly, and the other end is connected to the diaphragm;

[0008] One end of the first coil is connected to the surface of the diaphragm facing the magnetic circuit assembly, and the other end is suspended in the magnetic circuit gap;

[0009] The second coil is mounted on the surface of the diaphragm facing away from the magnetic circuit assembly.

[0010] Optionally, the magnetic circuit gap includes a first sub-magnetic circuit gap and a second sub-magnetic circuit gap that are spaced apart from each other;

[0011] The second coil includes a first side portion and a second side portion spaced apart from each other, the first side portion at least partially overlapping the orthographic projection of the first sub-magnetic circuit gap on the diaphragm, and the second side portion at least partially overlapping the orthographic projection of the second sub-magnetic circuit gap on the diaphragm.

[0012] Optionally, in a direction perpendicular to the diaphragm, the size of the second coil is smaller than the size of the first coil.

[0013] Optionally, the second coil is a planar coil.

[0014] Optionally, the magnetic circuit assembly includes a first magnetic plate and a first magnetic component, a second magnetic component, and a third magnetic component arranged sequentially at intervals on the first magnetic plate;

[0015] The second magnetic component and the first magnetic component form the first sub-magnetic circuit gap;

[0016] The second magnetic component and the third magnetic component form the second sub-magnetic circuit gap.

[0017] Optionally, a second magnetic plate is provided inside the second coil. The second magnetic plate is mounted on the surface of the diaphragm opposite to the first magnetic plate, and the second magnetic plate is disposed opposite to the second magnetic component.

[0018] Optionally, a third magnetic plate is provided inside the first coil. The third magnetic plate is mounted on the surface of the diaphragm facing the first magnetic plate, and the third magnetic plate is disposed opposite to the second magnetic component.

[0019] Optionally, the first coil includes opposing third and fourth sides;

[0020] One end of the third side is connected to the surface of the diaphragm facing the first magnetic plate, and the other end is suspended in the gap of the first sub-magnetic circuit.

[0021] One end of the fourth side is connected to the surface of the diaphragm facing the first magnetic plate, and the other end is suspended in the gap of the second sub-magnetic circuit.

[0022] Optionally, the end of the first coil away from the diaphragm has a first distance from the first magnetic plate, the first distance being equal to the sum of the amplitude of the first coil and a preset safety distance.

[0023] Optionally, the first magnetic component includes a first permanent magnet and a fourth magnetic plate, wherein the first permanent magnet is located between the first magnetic plate and the fourth magnetic plate;

[0024] The second magnetic component includes a second permanent magnet and a fifth magnetic plate, wherein the second permanent magnet is located between the first magnetic plate and the fifth magnetic plate;

[0025] The third magnetic component includes a third permanent magnet and a sixth magnetic plate, with the third permanent magnet located between the first magnetic plate and the sixth magnetic plate.

[0026] On the other hand, embodiments of this application also provide an electronic device, which includes the speaker described in any of the above claims.

[0027] The loudspeaker provided in this embodiment includes a magnetic circuit assembly, a first coil, a second coil, a diaphragm, and a diaphragm support. The magnetic circuit assembly has a magnetic gap containing a magnetic field. The diaphragm is mounted on the magnetic circuit assembly via the diaphragm support. One end of the first coil is connected to the surface of the diaphragm facing the magnetic circuit assembly, and the other end is suspended within the magnetic gap. When an AC power source connected to the first coil is energized, the first coil experiences a Lorentz force from the magnetic field, causing the diaphragm to vibrate. Simultaneously, since a second coil is mounted on the surface of the diaphragm facing away from the magnetic circuit assembly, when an AC power source connected to the second coil is energized, the second coil also experiences a Lorentz force from the magnetic field, further driving the diaphragm to vibrate. Therefore, in this embodiment, the diaphragm of the loudspeaker can vibrate simultaneously under the forces of the first and second coils, thus increasing the vibration amplitude of the diaphragm, i.e., increasing the driving force of the loudspeaker, and thereby improving the sensitivity of the loudspeaker. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a side view of a loudspeaker structure provided in an embodiment of this application;

[0030] Figure 2 This is a top view of the structure of the second coil and the second magnetic plate in a loudspeaker provided in an embodiment of this application;

[0031] Figure 3 This is a side view of a loudspeaker structure provided in an embodiment of this application;

[0032] Figure 4 This is a top view schematic diagram of the structure of a first magnetic plate, a first permanent magnet, a second permanent magnet, a third permanent magnet, and a first coil in a loudspeaker provided in an embodiment of this application.

[0033] The labels in the attached diagram are as follows:

[0034] 100. Magnetic circuit assembly; 110. Magnetic circuit gap; 120. First magnetic guide plate; 130. First magnetic assembly; 140. Second magnetic assembly; 150. Third magnetic assembly; 111. First sub-magnetic circuit gap; 112. Second sub-magnetic circuit gap; 131. First permanent magnet; 132. Fourth magnetic guide plate; 141. Second permanent magnet; 142. Fifth magnetic guide plate; 151. Third permanent magnet; 152. Sixth magnetic guide plate;

[0035] 200, First coil; 210, Third side; 220, Fourth side;

[0036] 300, Second coil; 310, First side portion; 320, Second side portion;

[0037] 400, diaphragm;

[0038] 500. Diaphragm support;

[0039] 600. Second magnetic plate;

[0040] 700, Third magnetic plate.

[0041] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0042] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0043] Unless otherwise defined, all technical terms used in the embodiments of this application have the same meaning as commonly understood by those skilled in the art.

[0044] To make the technical solutions and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0045] like Figure 1 As shown in the figure, this application embodiment provides a loudspeaker, which includes a magnetic circuit assembly 100, a first coil 200, a second coil 300, a diaphragm 400, and a diaphragm support 500.

[0046] The magnetic circuit assembly 100 has a magnetic circuit gap 110, within which a magnetic field exists. One end of the diaphragm support 500 is connected to the magnetic circuit assembly 100, and the other end is connected to the diaphragm 400. One end of the first coil 200 is connected to the surface of the diaphragm 400 facing the magnetic circuit assembly 100, and the other end is suspended within the magnetic circuit gap 110. It is understood that when an AC power source connected to the first coil 200 is energized, the first coil 200 will be subjected to a magnetic field force, i.e., a Lorentz force, causing the first coil 200 to reciprocate in the direction of the force, thereby causing the diaphragm 400 to reciprocate under the influence of the first coil 200.

[0047] The second coil 300 is mounted on the surface of the diaphragm 400 away from the magnetic circuit assembly 100. It is understood that when the AC power supply connected to the second coil 300 is energized, the second coil 300 will be subjected to a magnetic force, i.e., a Lorentz force, causing it to reciprocate in the direction of the force. This, in turn, will drive the diaphragm 400 to reciprocate. It should be noted that the first coil 200 and the second coil 300 can be connected to the same AC power supply or to separate AC power supplies. The current flow direction in the first coil 200 is the same as the current flow direction in the second coil 300, ensuring that the force exerted by the first coil 200 on the diaphragm 400 and the force exerted by the second coil 300 on the diaphragm 400 are in the same direction, thereby increasing the vibration amplitude of the diaphragm 400.

[0048] As can be seen from the above, in the embodiments of this application, the diaphragm 400 of the loudspeaker can reciprocate due to the force of the first coil 200 and the second coil 300, which enables the loudspeaker to emit sound. Therefore, it is equivalent to increasing the vibration amplitude of the diaphragm 400, that is, increasing the driving force of the loudspeaker, thereby improving the sensitivity of the loudspeaker.

[0049] The following is in conjunction with the appendix Figures 1 to 4 The various components and functions of the loudspeaker provided in the embodiments of this application will be described in more detail.

[0050] Combination Figure 1 and Figure 2 As shown, in some embodiments, the magnetic circuit gap 110 includes a first sub-magnetic circuit gap 111 and a second sub-magnetic circuit gap 112 spaced apart. The second coil 300 includes a first side portion 310 and a second side portion 320 spaced apart. The first side portion 310 and the orthographic projection of the first sub-magnetic circuit gap 111 on the diaphragm 400 at least partially coincide, and the second side portion 320 and the orthographic projection of the second sub-magnetic circuit gap 112 on the diaphragm 400 at least partially coincide. With this configuration, when the second coil 300 is energized, the magnetic fields in the first sub-magnetic circuit gap 111 and the second sub-magnetic circuit gap 112 can provide a large force to the second coil 300, ensuring that the second coil 300 has a large amplitude during reciprocating vibration.

[0051] In some embodiments, the magnetic circuit assembly 100 includes a first magnetic plate 120 and a first magnetic component 130, a second magnetic component 140, and a third magnetic component 150 sequentially spaced on the first magnetic plate 120. A first sub-magnetic circuit gap 111 is formed between the second magnetic component 140 and the first magnetic component 130. A second sub-magnetic circuit gap 112 is formed between the second magnetic component 140 and the third magnetic component 150.

[0052] In some embodiments, the two ends of the diaphragm bracket 500 are connected to the diaphragm 400 and the first magnetic plate 120, respectively, thereby providing support for the diaphragm 400. The diaphragm bracket 500 may be annular, and the first magnetic component 130, the second magnetic component 140, and the third magnetic component 150 are all located inside the diaphragm bracket 500.

[0053] Combination Figure 1 and Figure 4 As shown, in some embodiments, the first magnetic component 130 includes a first permanent magnet 131 and a fourth magnetic conductive plate 132, with the first permanent magnet 131 located between the first magnetic conductive plate 120 and the fourth magnetic conductive plate 132. The second magnetic component 140 includes a second permanent magnet 141 and a fifth magnetic conductive plate 142, with the second permanent magnet 141 located between the first magnetic conductive plate 120 and the fifth magnetic conductive plate 142. The third magnetic component 150 includes a third permanent magnet 151 and a sixth magnetic conductive plate 152, with the third permanent magnet 151 located between the first magnetic conductive plate 120 and the sixth magnetic conductive plate 152. It should be noted that the magnetic poles of the second permanent magnet 141 are opposite to those of the first permanent magnet 131, while the magnetic poles of the first permanent magnet 131 and the third permanent magnet 151 are aligned. With this configuration, the second permanent magnet 141 forms magnetic fields with both the first permanent magnet 131 and the third permanent magnet 151. In this embodiment, the first permanent magnet 131, the second permanent magnet 141, and the third permanent magnet 151 can be square, rectangular, circular, or other shapes. It should be noted that the number of the first magnetic component 130 and the number of the third magnetic component 150 can be set according to requirements, for example, two of each. In this case, the first magnetic component 130 and the corresponding third magnetic component 150 are arranged opposite each other.

[0054] like Figure 1 As shown, in some embodiments, the size of the second coil 300 is smaller than the size of the first coil 200 in the direction perpendicular to the diaphragm 400. It should be noted that the speaker provided in this embodiment can be installed inside an electronic device. Generally, the stacking space inside an electronic device is small. The second coil 300 of the above-described size occupies less stacking space, thus saving stacking space for the electronic device, allowing for the installation of more devices within the stacking space.

[0055] like Figure 2 As shown, in some embodiments, the second coil 300 is a planar coil. This arrangement ensures that the second coil 300 occupies less stacking space within the electronic device while also ensuring that the second coil 300 can fully utilize the magnetic field within the magnetic circuit space, allowing the magnetic field to exert a larger force on the second coil 300. In some embodiments, the first coil 200 is a cylindrical coil. It should be understood that a planar coil refers to a coil in which the wires are wound sequentially in a direction parallel to the diaphragm 400. A cylindrical coil refers to a coil in which the wires are wound sequentially in a direction perpendicular to the diaphragm 400.

[0056] like Figure 1 As shown, in some embodiments, a second magnetic plate 600 is fitted inside the second coil 300. The second magnetic plate 600 is mounted on the surface of the diaphragm 400 facing away from the first magnetic plate 120, and the second magnetic plate 600 is disposed opposite to the second magnetic component 140. It should be noted that when the second coil 300 is energized, the second magnetic plate 600 becomes an electromagnet. At this time, the electromagnet has two opposite magnetic poles. When the first coil 200 and the second coil 300 are subjected to an upward force exerted by the magnetic field, the magnetic pole of the electromagnet facing the second magnetic component 140 is the same as the magnetic pole of the second magnetic component 140 facing the second coil 300. Due to the principle of like poles repelling each other, the second magnetic plate 600 is also subjected to an upward repulsive force exerted by the second magnetic component 140, thereby further increasing the driving force of the diaphragm 400, making the vibration amplitude of the diaphragm 400 larger, and thus improving the sensitivity of the speaker. Understandably, when the AC power supply changes the direction of the current, the first coil 200 and the second coil 300 are subjected to a downward force exerted by the magnetic field. At this time, the magnetic poles of the electromagnet facing the second magnetic component 140 are opposite to the magnetic poles of the second magnetic component 140 facing the second coil 300. Due to the principle of attraction between opposite magnetic poles, the second magnetic plate 600 is also subjected to a downward attractive force exerted by the second magnetic component 140, which further increases the reverse driving force of the diaphragm 400, making the vibration amplitude of the diaphragm 400 larger, thereby improving the sensitivity of the speaker.

[0057] like Figure 3 As shown, in some embodiments, a third magnetic plate 700 is sleeved inside the first coil 200. The third magnetic plate 700 is mounted on the surface of the diaphragm 400 facing the first magnetic plate 120, and the third magnetic plate 700 is disposed opposite to the second magnetic component 140. It is understood that when the first coil 200 is energized, the third magnetic plate 700 becomes an electromagnet. It should be noted that the force on the third magnetic plate 700 is not the same as the force on the second magnetic plate 600, therefore, it will not be described again in this embodiment. By providing the third magnetic plate 700, the driving force of the diaphragm 400 can be further increased, resulting in a larger vibration amplitude of the diaphragm 400, thereby improving the sensitivity of the speaker.

[0058] Combination Figure 3 and Figure 4As shown, in some embodiments, the first coil 200 includes opposing third side portions 210 and fourth side portions 220. One end of the third side portion 210 is connected to the surface of the diaphragm 400 facing the first magnetic plate 120, and the other end is suspended within the first sub-magnetic circuit gap 111. One end of the fourth side portion 220 is connected to the surface of the diaphragm 400 facing the first magnetic plate 120, and the other end is suspended within the second sub-magnetic circuit gap 112. By suspending the third side portion 210 and the fourth side portion 220 within the corresponding first sub-magnetic circuit gap 111 and second sub-magnetic circuit gap 112, respectively, the first coil 200 can be prevented from colliding with the first magnetic plate 120 and being damaged during reciprocating vibration, thereby extending the service life of the speaker.

[0059] like Figure 1 As shown, in some embodiments, the end of the first coil 200 facing away from the diaphragm 400 has a first distance from the first magnetic plate 120. The first distance is equal to the sum of the amplitude of the first coil 200 and a preset safety distance. It should be noted that the preset safety distance can generally be adjusted according to requirements. For example, the first distance is 0.5mm and the preset safety distance is 0.15mm, thereby ensuring that the first coil 200 does not come into contact with the first magnetic plate 120 during reciprocating vibration, avoiding damage to the first coil 200 and improving the service life of the speaker.

[0060] On the other hand, this application also provides an electronic device, which includes the speaker described in any of the above embodiments. It should be noted that the electronic device in this application can be, for example, a mobile phone, a tablet computer, or a vehicle audio system. The speaker in the electronic device has the same composition and function as the speaker provided in the above embodiments. Since the diaphragm 400 of the speaker can vibrate simultaneously under the forces of the first coil 200 and the second coil 300, the vibration amplitude of the diaphragm 400 can be increased, that is, the driving force of the speaker can be increased, thereby improving the sensitivity of the speaker. This not only improves the sound effect of the electronic device but also reduces the power consumption of the electronic device.

[0061] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0062] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only.

[0063] It should be understood that this application is not limited to the precise structure 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 application is limited only by the appended claims.

Claims

1. A loudspeaker, characterized in that, The loudspeaker includes a magnetic circuit assembly (100), a first coil (200), a second coil (300), a diaphragm (400), and a diaphragm support (500). The magnetic circuit assembly (100) has a magnetic circuit gap (110) in which a magnetic field exists; One end of the diaphragm support (500) is connected to the magnetic circuit assembly (100), and the other end is connected to the diaphragm (400); One end of the first coil (200) is connected to the surface of the diaphragm (400) facing the magnetic circuit assembly (100), and the other end is suspended in the magnetic circuit gap (110); The second coil (300) is mounted on the surface of the diaphragm (400) facing away from the magnetic circuit assembly (100).

2. The loudspeaker according to claim 1, characterized in that, The magnetic circuit gap (110) includes a first sub-magnetic circuit gap (111) and a second sub-magnetic circuit gap (112) that are spaced apart from each other. The second coil (300) includes a first side portion (310) and a second side portion (320) spaced apart from each other. The first side portion (310) and the first sub-magnetic circuit gap (111) at least partially overlap on the orthographic projection of the first side portion (310) and the second side portion (320) and the second sub-magnetic circuit gap (112) at least partially overlap on the orthographic projection of the second side portion (320) and the second sub-magnetic circuit gap (112) on the diaphragm (400).

3. The loudspeaker according to claim 2, characterized in that, In the direction perpendicular to the diaphragm (400), the size of the second coil (300) is smaller than the size of the first coil (200).

4. The loudspeaker according to claim 2, characterized in that, The second coil (300) is a planar coil.

5. The loudspeaker according to claim 2, characterized in that, The magnetic circuit assembly (100) includes a first magnetic plate (120) and a first magnetic component (130), a second magnetic component (140) and a third magnetic component (150) arranged sequentially at intervals on the first magnetic plate (120). The second magnetic component (140) and the first magnetic component (130) form the first sub-magnetic circuit gap (111). The second sub-magnetic circuit gap (112) is formed between the second magnetic component (140) and the third magnetic component (150).

6. The loudspeaker according to claim 5, characterized in that, The second coil (300) is fitted with a second magnetic plate (600), which is mounted on the surface of the diaphragm (400) away from the first magnetic plate (120). The second magnetic plate (600) is disposed opposite to the second magnetic component (140).

7. The loudspeaker according to claim 5, characterized in that, The first coil (200) is fitted with a third magnetic plate (700), which is mounted on the surface of the diaphragm (400) facing the first magnetic plate (120). The third magnetic plate (700) is disposed opposite to the second magnetic component (140).

8. The loudspeaker according to claim 5, characterized in that, The first coil (200) includes opposing third side (210) and fourth side (220). One end of the third side (210) is connected to the surface of the diaphragm (400) facing the first magnetic plate (120), and the other end is suspended in the first sub-magnetic circuit gap (111); One end of the fourth side (220) is connected to the surface of the diaphragm (400) facing the first magnetic plate (120), and the other end is suspended in the second sub-magnetic circuit gap (112).

9. The loudspeaker according to claim 5, characterized in that, The end of the first coil (200) facing away from the diaphragm (400) has a first distance from the first magnetic plate (120), the first distance being equal to the sum of the amplitude of the first coil (200) and a preset safety distance.

10. The loudspeaker according to claim 5, characterized in that, The first magnetic component (130) includes a first permanent magnet (131) and a fourth magnetic plate (132), wherein the first permanent magnet (131) is located between the first magnetic plate (120) and the fourth magnetic plate (132); The second magnetic component (140) includes a second permanent magnet (141) and a fifth magnetic plate (142), wherein the second permanent magnet (141) is located between the first magnetic plate (120) and the fifth magnetic plate (142); The third magnetic component (150) includes a third permanent magnet (151) and a sixth magnetic plate (152), wherein the third permanent magnet (151) is located between the first magnetic plate (120) and the sixth magnetic plate (152).

11. An electronic device, characterized in that, The electronic device includes a speaker as claimed in any one of claims 1 to 10.

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