CN117336651A - Speaker, speaker module and electronic equipment - Google Patents

Abstract

The application provides a loudspeaker, a loudspeaker module and electronic equipment. The speaker includes a support, a first vibration assembly, a second vibration assembly, and a magnetic circuit assembly. The first vibration component, the second vibration component and the magnetic circuit component are coaxially arranged on the supporting piece, and the magnetic circuit component is arranged between the first vibration component and the second vibration component, so that the first vibration component and the second vibration component can share the magnetic circuit component, the axial size of the loudspeaker is reduced, and the loudspeaker is miniaturized. The first vibration assembly comprises a first vibration plate, the second vibration assembly comprises a second vibration plate, the first vibration plate and the second vibration plate are oppositely arranged, and an acoustic cavity is formed between the first vibration plate and the second vibration plate. When vibrating, the first vibrating plate and the second vibrating plate can vibrate in opposite directions or in opposite directions so as to offset the reaction force generated by vibration, and stronger convection air can be generated so as to take away the heat of the vibrating assembly and the magnetic circuit assembly, thereby improving the heat dissipation performance of the loudspeaker.

Description

Speaker, speaker module and electronic equipment

Technical Field

The application relates to the technical field of electronic equipment, in particular to a loudspeaker, a loudspeaker module and electronic equipment.

Background

A speaker is an electroacoustic transducer that converts electrical energy into acoustic energy and radiates it in air to a distance. A moving coil speaker generally includes a support system, a magnetic circuit system, and a vibration system. Specifically, the support system mainly comprises a basin stand. The magnetic circuit system comprises a magnet, a soft magnetic material pole piece and a yoke. The vibration system includes a diaphragm, a voice coil, and a damper. When the loudspeaker works, the magnetic circuit system generates a magnetic field to apply acting force to the electrified voice coil, so as to drive the voice coil to vibrate. The vibration of voice coil can drive the vibrating plate and vibrate to promote the air of vibrating plate front end to vibrate, thereby produce sound. The vibration state of the vibration plate directly affects the acoustic performance of the loudspeaker, such as the size of the transmitted sound, the bandwidth range, and the distortion performance.

With the trend of miniaturization and weight reduction of electronic devices, the size requirements for speakers are becoming more stringent. In practice, however, the sensitivity of a loudspeaker is closely related to its size. Fig. 1 is a schematic diagram of a loudspeaker. As shown in fig. 1, when the speaker 01 is operated, the vibration of the vibration plate 02 may push air to vibrate, thereby forming sound waves. The sound pressure P of the sound wave is proportional to the area S of the speaker 01 and the vibration displacement d. Therefore, the size of the speaker 01 is reduced, which results in a reduction in vibration displacement, so that the low-frequency sensitivity of the speaker is also reduced.

Disclosure of Invention

The application provides a speaker, a speaker module and an electronic device to realize miniaturization of the speaker module on the basis of guaranteeing low frequency sensitivity of the speaker.

In a first aspect, the present application provides a speaker. The speaker includes a support, a first vibration assembly, a second vibration assembly, and a magnetic circuit assembly. Specifically, the first vibration component, the second vibration component and the magnetic circuit component are coaxially arranged on the supporting piece. The first vibration assembly includes a first vibration plate and the second vibration assembly includes a second vibration plate. The first vibration plate is disposed opposite to the second vibration plate, and an acoustic cavity may be formed between the first vibration plate and the second vibration plate. The magnetic circuit assembly is arranged between the first vibration assembly and the second vibration assembly, so that the first vibration assembly and the second vibration assembly can share the magnetic circuit assembly.

Among the above-mentioned speaker of this application, first vibration subassembly and second vibration subassembly coaxial setting to can share magnetic circuit subassembly and acoustic cavity, on the one hand can realize first vibration subassembly and second vibration subassembly in axial direction vibration, on the other hand can reduce the size of speaker along axial direction, be favorable to the miniaturization of speaker. And the first vibrating plate and the second vibrating plate are coaxial and oppositely arranged, and the first vibrating plate and the second vibrating plate can coaxially vibrate in opposite directions or reversely, so that vibration-producing force can be increased, reaction force caused by vibration is counteracted, vibration of the first vibrating assembly and the second vibrating assembly cannot be transmitted to the outside, resonance can be avoided, and acoustic performance of the loudspeaker is improved. In addition, the first vibrating plate and the second vibrating plate can generate stronger convection air during vibration, so that heat generated by the first vibrating assembly, the second vibrating assembly and the magnetic circuit assembly can be taken away, and the heat dissipation performance of the loudspeaker is improved.

When the magnetic circuit assembly is arranged, the magnetic circuit assembly can comprise a fixed support, a magnetizer and a magnet assembly, wherein the fixed support is connected with the supporting piece, and the magnetizer is connected with the fixed support. Specifically, the magnetizer may be a cylindrical magnetizer, and the cylindrical magnetizer is coaxially arranged with the first vibration assembly and is directly connected with the fixing bracket. The magnet assembly is arranged in the cylindrical magnetic conductor. The magnet assembly may include a first magnetic conductive sheet, a first magnet, a second magnetic conductive sheet, a second magnet, and a third magnetic conductive sheet stacked in this order in an axial direction of the cylindrical magnetizer. The first magnetic conduction piece is close to the first vibration assembly, and the third magnetic conduction piece is close to the second vibration assembly. In the magnetic circuit assembly with the structural design, the cylindrical magnetizer can shield a magnetic field so as to prevent magnetic leakage of the magnet assembly. The magnetizing direction of the first magnet is the same as that of the second magnet, and the first magnetic conduction sheet, the second magnetic conduction sheet and the third magnetic conduction sheet conduct magnetic force lines emitted by the first magnet and the second magnet according to the set direction to form an annular magnetic field loop. After the loudspeaker is electrified, the first vibration assembly and the second vibration assembly vibrate the first vibration plate and the second vibration plate under the action of the magnetic circuit assembly, so that electric energy is converted into sound energy. The magnetic circuit assembly is simple in structure, can be designed into a smaller size, and is beneficial to miniaturization of the loudspeaker.

In one technical scheme, a first gap is formed between the cylindrical magnetizer and the first magnetic conductive sheet, and a second gap is formed between the cylindrical magnetizer and the second magnetic conductive sheet. The first vibration assembly further includes a first voice coil that is insertable into the cylindrical magnetizer through the first gap to be positioned in the magnetic field loop. The second vibration assembly further includes a second voice coil that is insertable into the cylindrical magnetizer through the second gap to be positioned in the magnetic field loop. In this way, the electrified first voice coil can reciprocate under the action of the magnetic field loop, so that the first vibrating plate is driven to vibrate; the electrified second voice coil can reciprocate under the action of the magnetic field loop, so that the second vibrating plate is driven to vibrate. Because the first voice coil and the second voice coil move along the axial direction when vibrating after being electrified, in order to avoid collision when the first voice coil and the second voice coil move in opposite directions, the diameters of the first voice coil and the second voice coil can be unequal. That is, the cross-sectional area of the first voice coil perpendicular to the axial direction may be greater than or less than the cross-sectional area of the second voice coil perpendicular to the axial direction.

In order to improve the structural strength of the magnetic circuit assembly, the magnetic circuit assembly may further include a first support sheet. In a specific technical scheme, the first supporting piece can be arranged between the cylindrical magnetizer and the magnet assembly, and the cylindrical magnetizer and the third magnetic conductive piece are respectively connected with the first supporting piece, so that the magnet assembly is fixed in the cylindrical magnetic conductive body through the first supporting piece. In another specific technical scheme, the magnetizer can include a first cylinder and a second cylinder which are coaxially arranged, and the first cylinder is arranged close to the first vibration component. The first support piece may be located between the first cylinder and the second cylinder, and between the second magnetic conductive piece and the second magnet. Therefore, the first support piece can be connected with the fixed bracket, the cylindrical magnetizer, the second magnetic conduction piece and the second magnet, so that the cylindrical magnetizer and the magnet assembly are fixed on the fixed bracket through the first support piece.

In other aspects, the magnetic circuit assembly may include a fixed bracket coupled to the support, a magnetizer coupled to the fixed bracket, and a magnet assembly coupled to the magnetizer. Specifically, the magnetizer may include a first magnetic conductive column and a second magnetic conductive column coaxially disposed with the first vibration assembly, where the first magnetic conductive column is disposed near the first vibration assembly and the second magnetic conductive column is disposed near the second vibration assembly. The magnet assembly comprises a fourth magnetic conduction sheet, a third magnet, a fourth magnet and a fifth magnetic conduction sheet which are sequentially overlapped along the axial direction. The fourth magnetic conduction sheet and the third magnet are arranged on the periphery of the first magnetic conduction column, and the fourth magnetic conduction sheet is close to the first vibration assembly. The fourth magnet and the fifth magnetic conduction piece are arranged on the periphery of the second magnetic conduction column, and the fifth magnetic conduction piece is arranged close to the second vibration assembly. In the magnetic circuit assembly with the structural design, the magnetizing direction of the third magnet is the same as the magnetizing direction of the fourth magnet, and the fourth magnetic conduction sheet, the first magnetic conduction column, the fifth magnetic conduction sheet and the second magnetic conduction column can conduct magnetic force lines emitted by the third magnet and the fourth magnet according to the set direction to form an annular magnetic field loop. After the loudspeaker is electrified, the first vibration assembly and the second vibration assembly vibrate the first vibration plate and the second vibration plate under the action of the magnetic circuit assembly, so that electric energy is converted into sound energy. The magnetic circuit assembly is simple in structure and can reduce the size of the loudspeaker along the axial direction.

In one embodiment, a third gap is formed between the first magnetic conductive column and the fourth magnetic conductive sheet, and a fourth gap is formed between the second magnetic conductive column and the fifth magnetic conductive sheet. The first vibration assembly further comprises a third voice coil, and the third voice coil is inserted between the first magnetic conduction column and the third magnet through a third gap so as to be positioned in the magnetic field loop. The second vibration assembly further comprises a fourth voice coil, and the fourth voice coil is inserted between the second magnetic conduction column and the fourth magnet through the fourth gap so as to be positioned in the magnetic field loop. In this way, the third voice coil after being electrified can reciprocate under the action of the magnetic field loop, so that the first vibrating plate is driven to vibrate; the fourth voice coil after being electrified can do reciprocating motion under the action of the magnetic field loop, so as to drive the second vibrating plate to vibrate. In order to avoid collision when the third voice coil and the fourth voice coil move toward each other, the diameter of the third voice coil and the diameter of the fourth voice coil may not be equal. That is, the cross-sectional area of the third voice coil perpendicular to the axial direction may be larger or smaller than the cross-sectional area of the fourth voice coil perpendicular to the axial direction.

In order to improve the structural strength of the magnetic circuit assembly, the magnetic circuit assembly may further include a second support sheet. Specifically, the first magnetic conduction column, the fourth magnetic conduction sheet and the third magnet are arranged on one side, close to the first vibration assembly, of the second supporting sheet, and the second magnetic conduction column, the fourth magnet and the fifth magnetic conduction sheet are arranged on one side, close to the second vibration assembly, of the second supporting sheet. In the technical scheme, the fixed support, the third magnet, the fourth magnet, the first magnetic conduction column and the second magnetic conduction column can be respectively connected with the second supporting sheet, so that the third magnet, the fourth magnet, the first magnetic conduction column and the second magnetic conduction column are fixed on the fixed support through the second supporting sheet.

In the present application, the speaker may further include at least one sound guiding component. The sound guide assembly includes a mounting portion and a sound guide portion. The mounting portion is used for being connected with the shell of the loudspeaker module. The sound guide portion is connected with the mounting portion, and the sound guide portion is disposed on a peripheral side of the acoustic cavity. The sound guide part is provided with a sound guide channel which is communicated with the sound cavity and the outside. In this technical scheme, the installation department can be with the casing direct connection of speaker module to can simplify the equipment and the dismantlement of speaker module.

In some embodiments, the at least one sound guiding component may include a first sound guiding component and a second sound guiding component, where a sound guiding portion of the first sound guiding component and a sound guiding portion of the second sound guiding component are disposed on two sides of the sound cavity. The loudspeaker adopts two sound guide channels, and the sound emitting area of the loudspeaker can be increased, so that wind noise and vibration balance are reduced.

In the above technical solution, the mounting portion may also form an integral structure with the sound guiding portion. That is, the sound guide assembly can be an integrally formed structure, so that the structural strength of the sound guide assembly can be improved, and the manufacturing process of the loudspeaker can be simplified.

The first vibration assembly may further include a first voice coil supporter, and the voice coil of the first vibration assembly may be disposed at an outer edge of the first voice coil supporter. The second vibration assembly may further include a second voice coil bracket, and the voice coil of the second vibration assembly may be disposed at an outer edge of the second voice coil bracket. The first voice coil bracket and the second voice coil bracket are coaxially arranged. Since the diameter of the first voice coil is not equal to the diameter of the second voice coil, the first voice coil bobbin may be set so that the diameter thereof is not equal to the diameter of the second voice coil bobbin. That is, the cross section of the first voice coil former may be larger or smaller than the cross section of the second voice coil former.

In a specific application, since the dimensions of the first voice coil bracket and the second voice coil bracket may be different, the overall dimensions of the first vibration component and the second vibration component may also be different. Of course, the overall size of the first vibration component and the overall size of the second vibration component may be the same, so that the overall appearance of the speaker is simple, and the installation and the disassembly are facilitated.

In a second aspect, the present application provides a speaker module. The speaker module comprises a shell and the speaker of the first aspect, wherein the speaker is arranged in the shell. In this speaker module, first vibration subassembly and second vibration subassembly coaxial arrangement to can share magnetic circuit subassembly, on the one hand can realize that first vibration subassembly and second vibration subassembly vibrate in axial direction, on the other hand can reduce the speaker along axial direction's size, be favorable to speaker module's miniaturization. And the first vibration plate and the second vibration plate are coaxial and oppositely arranged, and can coaxially and oppositely vibrate during vibration, so that vibration damping force can be increased, reaction force caused by vibration can be counteracted, and the acoustic performance of the loudspeaker module is improved. In addition, the first vibrating plate and the second vibrating plate can generate stronger convection air during vibration, so that heat generated by the first vibrating assembly, the second vibrating assembly and the magnetic circuit assembly can be taken away, and the heat dissipation performance of the loudspeaker module is improved.

When the speaker includes at least one sound guide member, the housing may have mounting holes provided in one-to-one correspondence with the sound guide members. The sound guide assembly is mounted in the mounting hole so as to communicate the acoustic cavity with the mounting hole and guide sound waves from the acoustic cavity to the outside. And the sound guide assembly can be directly installed with the shell, so that the assembly and disassembly of the loudspeaker module can be simplified.

In a third aspect, the present application provides an electronic device. The electronic equipment comprises a body and the loudspeaker module of the second aspect, wherein the loudspeaker module is arranged on the body. The electronic equipment can be a vehicle-mounted sound box, a television, an intelligent terminal or an intelligent sound box and the like, and the application of the electronic equipment is not limited to specific application scenes of the loudspeaker module. The electronic device adopts the speaker module of the second aspect, and can be miniaturized without affecting the low-frequency sensitivity.

Drawings

Fig. 1 is a schematic diagram of a loudspeaker;

fig. 2 is a schematic structural diagram of a speaker according to an embodiment of the present application;

FIG. 3 is a schematic cross-sectional view of the speaker of FIG. 2;

FIG. 4 is a schematic diagram of a magnetic circuit assembly according to an embodiment of the present application;

FIG. 5 is a schematic view of another structure of a magnetic circuit assembly according to an embodiment of the present application;

FIG. 6 is a schematic view of another structure of a magnetic circuit assembly according to an embodiment of the present application;

fig. 7 is a schematic diagram of another structure of a speaker according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a speaker module according to an embodiment of the present application;

fig. 9 is a schematic diagram of another structure of a speaker module according to an embodiment of the present application.

Reference numerals:

01-a speaker; 02-a vibrating plate;

10-a speaker; 11-a first vibration assembly;

12-a second vibration assembly; 13-a support;

14-a magnetic circuit assembly; 15-an acoustic cavity;

16-an acoustic guide assembly; 16 a-a first sound guiding component;

16 b-a second sound guiding component; 17-a rear cavity;

80-a speaker module; 81-a housing;

110-a first vibration plate; 111-a first basin stand;

112-first centering tabs; 113-a first voice coil former;

114-a first voice coil; 115-a first cover;

120-a second vibration plate; 121-a second basin stand;

122-a second centering tab; 123-a second voice coil former;

124-a second voice coil; 125-a second cover;

141-a fixed bracket; 142-magnetizer;

142 a-a first magnetically permeable column; 142 b-a second magnetically permeable column;

143-a magnet assembly; 144-a first magnetic conductive sheet;

145-a first magnet; 146-a second magnetic conductive sheet;

147-a second magnet; 148-a third magnetic conductive sheet;

149—a first gap; 150-a second gap;

151-supporting sheets; 152-fourth magnetic conductive sheet;

153-a third magnet; 154-a fourth magnet;

155-a fifth magnetic conductive sheet; 156-a third gap;

157-fourth gap; 161-mounting part;

162-sound guide; 162 a-a first sound guide;

162 b-a second sound guide; 163-sound guide channel;

163 a-a first sound guide channel; 163 b-a second sound guide channel;

811-mounting holes; 811 a-a first mounting hole;

811 b-a second mounting hole.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the present application will be described in further detail with reference to the accompanying drawings.

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

The terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include, for example, "one or more" such forms of expression, unless the context clearly indicates to the contrary.

The application provides a speaker, a speaker module and an electronic device to realize miniaturization of the speaker module on the basis of guaranteeing low frequency sensitivity of the speaker.

Fig. 2 is a schematic structural diagram of a speaker according to an embodiment of the present application, and fig. 3 is a schematic sectional diagram of the speaker in fig. 2. As shown in fig. 2 and 3, the speaker 10 includes a first vibration assembly 11, a second vibration assembly 12, a support 13, and a magnetic circuit assembly 14. Wherein the first vibration assembly 11, the second vibration assembly 12 and the magnetic circuit assembly 14 are coaxially disposed and mounted to the support 13. The magnetic circuit assembly 14 is disposed between the first vibration assembly 11 and the second vibration assembly 12, so that the first vibration assembly 11 and the second vibration assembly 12 can share the magnetic circuit assembly 14. The first vibration assembly 11 includes a first vibration plate 110, and the second vibration assembly 12 includes a second vibration plate 120. The first vibration plate 110 is disposed opposite to the second vibration plate 120, and an acoustic cavity 15 may be formed between the first vibration plate 110 and the second vibration plate 120.

In this application, the acoustic chamber 15 refers to a front chamber, i.e., a chamber formed between the first vibration plate 110 and the second vibration plate 120. In addition, the speaker 10 further includes a rear chamber 17, i.e., a side chamber of the first diaphragm 110 away from the magnetic circuit assembly 14, and a side chamber of the second diaphragm 120 away from the magnetic circuit assembly 14.

The loudspeaker 10 of this application adopts two vibration subassembly structural design, and wherein, first vibration subassembly 11 and second vibration subassembly 12 coaxial setting to can share magnetic circuit assembly 14 and acoustic cavity 15, on the one hand can realize the vibration of first vibration subassembly 11 and second vibration subassembly 12 in axial direction, on the other hand can reduce the size of loudspeaker 10 along axial direction, be favorable to the miniaturization of speaker module. The first vibration plate 110 and the second vibration plate 120 are coaxially and oppositely disposed, and when the first vibration plate 110 and the second vibration plate 120 vibrate simultaneously, the first vibration plate 110 and the second vibration plate 120 can displace toward the magnetic circuit assembly 14 simultaneously or displace away from the magnetic circuit assembly 14 simultaneously. That is, the first and second vibration plates 110 and 120 may vibrate coaxially in opposite directions, so that the damping force may be increased and the reaction force caused by the vibration may be offset, so that the vibrations of the first and second vibration assemblies 11 and 12 may not be transmitted to the outside, and thus resonance may be avoided, and the acoustic performance of the speaker 10 may be improved. In addition, when the first vibration plate 110 and the second vibration plate 120 vibrate at the same time, strong convection air can be generated, so that heat generated by the first vibration assembly 11, the second vibration assembly 12 and the magnetic circuit assembly 14 can be taken away, and the heat dissipation performance of the loudspeaker 10 can be improved.

With continued reference to fig. 3, in some embodiments of the present application, the first vibration assembly 11 may further include a first frame 111, a first stator 112, a first voice coil support 113, and a first voice coil 114. The second vibration assembly 12 may further include a second bobbin 121, a second centering support 122, a second voice coil bobbin 123, and a second voice coil 124. The first voice coil bobbin 113 may be fixed in the first bobbin 111 through the first centering support piece 112, the second voice coil bobbin 123 may be fixed in the second bobbin 121 through the second centering support piece 122, and the first voice coil bobbin 113 and the second voice coil bobbin 123 may be coaxially disposed. The first voice coil 114 and the first diaphragm 110 are respectively disposed at the outer edges of the first voice coil bobbin 113, and the first diaphragm 110 is located between the first voice coil 114 and the first stator support 112. When the first voice coil 114 is energized, the first voice coil 114 can drive the first vibration plate 110 to vibrate under the action of the magnetic circuit assembly 14. The second voice coil 124 and the second diaphragm 120 are respectively disposed at the outer edges of the second voice coil bracket 123, and the second diaphragm 120 is located between the second voice coil 124 and the second centering support 122. When the second voice coil 124 is energized, the second voice coil 124 may vibrate the second diaphragm 120 under the action of the magnetic circuit assembly 14. In this embodiment, the first and second centering tabs 112 and 122 may position the first and second voice coil brackets 113 and 123 in a coaxial arrangement. In addition, the first vibration component 11 and the second vibration component 12 adopt the same structural design, so that not only can the structural design of the loudspeaker 10 be simplified and the thickness of the loudspeaker 10 along the central axis x direction be reduced, but also the manufacturing flow of the loudspeaker 10 can be simplified, thereby reducing the manufacturing cost of the loudspeaker 10.

In addition, the first vibration assembly 11 may further include a first cover 115, and the first cover 115 may seal the first voice coil bobbin 113 to prevent dust and the like from entering the first vibration assembly 11 and the magnetic circuit assembly 14 through the first voice coil bobbin 113. Similarly, the second vibration assembly 12 may further include a second cover 125. The second cover 125 may seal the second voice coil bobbin 123 to prevent particles such as dust from entering the second vibration assembly 12 and the magnetic circuit assembly 14 through the second voice coil bobbin 123.

Fig. 4 is a schematic structural diagram of a magnetic circuit assembly according to an embodiment of the present application. As shown in fig. 3 and 4, when the above-described magnetic circuit assembly 14 is provided, the magnetic circuit assembly 14 may include a fixing bracket 141, a magnetizer 142, and a magnet assembly 143. Specifically, the fixing bracket 141 is connected to the support 13 so as to position the magnetic circuit assembly 14 with respect to the first and second vibration assemblies 11 and 12. The magnetizer 142 is disposed on the fixing bracket 141, and the magnet assembly 143 is connected with the magnetizer 142. In the magnetic circuit assembly 14 of this structural design, the magnet assembly 143 can emit magnetic lines of force to form an annular magnetic field loop. When the loudspeaker 10 is powered on, the first vibration component 11 and the second vibration component 12 form sound waves under the action of the magnetic circuit component 14, so that electric energy is converted into sound energy. In the present application, the magnet assembly 143 may include one magnet or may include a plurality of magnets.

For example, in one particular embodiment, the magnetic conductor 142 may be a cylindrical magnetic conductor, with the cylindrical magnetic conductor, the first vibration assembly 11, and the second vibration assembly 12 being coaxially disposed. In this embodiment, the cylindrical magnetic conductor has openings at both ends, and the magnet assembly 143 may be disposed in the cylindrical magnetic conductor. The magnet assembly 143 may include a first magnetic-conductive sheet 144, a first magnet 145, a second magnetic-conductive sheet 146, a second magnet 147, and a third magnetic-conductive sheet 148 stacked in order along the central axis x. The magnetizing direction of the first magnet 145 is the same as that of the second magnet 147, and the first magnetic conductive sheet 144, the second magnetic conductive sheet 146 and the third magnetic conductive sheet 148 can conduct magnetic lines of force emitted from the first magnet 145 and the second magnet 147 according to a set direction to form an annular magnetic field loop. In this embodiment, the same magnetization direction of the first magnet 145 and the second magnet 147 means a direction along the central axis x, and the magnetic poles of the first magnet 145 and the second magnet 147 are arranged in the N-pole, S-pole, or in the S-pole, N-pole, S-pole, N-pole. That is, the first magnet 145 and the second magnet 147 have different magnetic poles facing each other. The cylindrical magnetizer may shield the magnetic field to prevent magnetic leakage of the magnet assembly 143. When the speaker 10 is powered on, the first voice coil 114 and the second voice coil 124 are respectively powered on and move under the action of the magnetic field circuit to drive the first vibration plate 110 and the second vibration plate 120 to vibrate, so as to convert the electric energy into acoustic energy. The magnetic circuit assembly 14 is simple in structure and can be designed to be small in size, which is advantageous for miniaturization of the speaker 10.

With continued reference to fig. 4, a first gap 149 is provided between the magnetic conductor 142 and the first magnetic conductive sheet 144, and the first voice coil 114 may be inserted into the magnetic conductor 142 through the first gap 149 to be positioned in the magnetic field circuit. The energized first voice coil 114 may reciprocate under the magnetic field circuit, thereby driving the first vibration plate 110 to vibrate. A second gap 150 is provided between the magnetic conductor 142 and the third magnetic conductive piece 148, and the second voice coil 124 may be inserted into the magnetic conductor 142 through the second gap 150 to be positioned in the magnetic field circuit. The energized second voice coil 124 may reciprocate under the magnetic field circuit, thereby driving the second vibration plate 120 to vibrate.

In the above embodiment, since the energized first voice coil 114 and the second voice coil 124 move in the axial direction when vibrating, in order to avoid collision when the first voice coil 114 and the second voice coil 124 move toward each other, the size of the first voice coil 114 may be larger than the size of the second voice coil 124. In particular, a cross section of the first voice coil bobbin 113 perpendicular to the central axis x may be set to be larger than a cross section of the second voice coil bobbin 123 perpendicular to the central axis x. This can avoid the collision between the first voice coil 114 and the second voice coil 124 during movement, and can enable the first voice coil 114 and the second voice coil 124 to vibrate in an overlapping manner along the x direction of the central axis, which is beneficial to reducing the overall thickness of the loudspeaker 10.

In practical applications, even though the dimensions of the first voice coil bobbin 113 and the second voice coil bobbin 123, the dimensions of the first voice coil 114 and the second voice coil 124, and the dimensions of the first vibration plate 110 and the second vibration plate 120 are all different, the overall dimensions of the first vibration assembly 11 may be the same as the overall dimensions of the second vibration assembly 12, that is, the thickness of the first vibration assembly 11 along the central axis x may be the same as the thickness of the second vibration assembly 12 along the central axis x, and/or the cross section of the first vibration assembly 11 perpendicular to the central axis x may be the same as the cross section of the second vibration assembly 12 perpendicular to the central axis x. This can make the overall structure of the speaker 10 simple, facilitating installation and removal. Of course, in practice, the requirements for the appearance and size of the speaker 10 are different due to the different application scenarios of the speaker 10. In some embodiments, the overall size of the first vibration assembly 11 may also be different from or substantially the same as the overall size of the second vibration assembly 12, and the overall appearance of the speaker 10 may be irregularly shaped, which is not particularly limited herein. It should be noted that "substantially the same" may be that the overall dimensions of the first vibration module 11 and the second vibration module 12 may differ by 0.05mm, 0.1mm, 0.2mm, 0.25mm, 0.275mm, 0.4mm, 0.7mm, 1mm, 3mm, 5.8mm, 7mm, 10mm, or the like, and the present application is not particularly limited. In addition, the difference may be specifically designed according to the need, or may be caused by manufacturing errors.

With continued reference to fig. 4, the magnetic circuit assembly 14 may further include a support plate 151 to enhance the structural strength of the magnetic circuit assembly 14. In a specific embodiment, the cylindrical magnetizer may be directly connected to the fixing bracket 141. The support piece 151 is disposed between the cylindrical magnetizer and the magnet assembly 143, and the cylindrical magnetizer and the third magnetic conductive piece 148 are respectively connected with the support piece 151, so that the magnet assembly 143 is fixed inside the cylindrical magnetizer through the support piece 151.

Fig. 5 is a schematic diagram of another structure of the magnetic circuit assembly according to the embodiment of the present application. In another specific embodiment, as shown in fig. 5, the magnetic conductor 142 may be a cylindrical magnetic conductor and include a first cylinder and a second cylinder coaxially disposed. Wherein the first cylinder is arranged close to the first vibration assembly 11. The support piece 151 is disposed between the first cylinder and the second cylinder, and is also disposed between the second magnetic conductive piece 146 and the second magnet 147. The fixing bracket 141, the magnetizer 142, the second magnetic conductive sheet 146, and the second magnet 147 are respectively connected to the supporting sheet 151, so that the magnetizer 142 and the magnet assembly 143 are fixed to the fixing bracket 141 through the supporting sheet 151.

Fig. 6 is a schematic diagram of another structure of the magnetic circuit assembly according to the embodiment of the present application. In other embodiments, as shown in fig. 6, the magnetic conductor 142 may also include a first magnetic conductive post 142a and a second magnetic conductive post 142b disposed coaxially with the first vibration assembly 11. That is, the first vibration member 11, the first magnetically permeable column 142a, the second magnetically permeable column 142b, and the second vibration member 12 are coaxially disposed. The first magnetic conductive column 142a is disposed near the first vibration assembly 11, and the second magnetic conductive column 142b is disposed near the second vibration assembly 12. The magnet assembly 143 includes a fourth magnetic-conductive sheet 152, a third magnet 153, a fourth magnet 154, and a fifth magnetic-conductive sheet 155 stacked in this order along the central axis x direction. The fourth magnetic conductive sheet 152 and the third magnet 153 are disposed on the circumferential side of the first magnetic conductive column 142a, and the fourth magnetic conductive sheet 152 is disposed close to the first vibration assembly 11. The fourth magnet 154 and the fifth magnetic-conductive sheet 155 are disposed on the circumferential side of the second magnetic-conductive column 142b, and the fifth magnetic-conductive sheet 155 is disposed close to the second vibration assembly 12. In the magnetic circuit assembly 14 with this structural design, the magnetizing direction of the third magnet 153 is the same as the magnetizing direction of the fourth magnet 154, and the fourth magnetic conductive sheet 152, the first magnetic conductive column 142a, the fifth magnetic conductive sheet 155 and the second magnetic conductive column 142b can conduct the magnetic lines of force emitted from the third magnet 153 and the fourth magnet 154 according to the set direction, so as to form an annular magnetic field loop. When the loudspeaker 10 is powered on, the first vibration assembly 11 and the second vibration assembly 12 vibrate the first vibration plate 110 and the second vibration plate 120 under the action of the magnetic circuit assembly 14, so as to convert electric energy into acoustic energy. The magnetic circuit assembly 14 is simple in structure and can reduce the size of the loudspeaker 10 in the axial direction.

In one embodiment, a third gap 156 is formed between the first magnetic conductive pillar 142a and the fourth magnetic conductive sheet 152, and a fourth gap 157 is formed between the second magnetic conductive pillar 142b and the fifth magnetic conductive sheet 155. The first voice coil 114 of the first vibration assembly 11 is inserted between the first magnetic conductive pole 142a and the third magnet 153 through the third gap 156 to be positioned in the magnetic field circuit. The second voice coil 124 of the second vibration assembly 12 is inserted between the second magnetic permeable post 142b and the fourth magnet 154 through the fourth gap 157 to be positioned in the magnetic field circuit. Thus, the first voice coil 114 after being energized can reciprocate under the action of the magnetic field loop, so as to drive the first vibration plate 110 to vibrate; the energized second voice coil 124 may reciprocate under the magnetic field circuit, thereby driving the second vibration plate 120 to vibrate.

In order to improve the structural strength of the magnetic circuit assembly 14, the magnetic circuit assembly 14 of the above embodiment may also be provided with the support piece 151. Specifically, the first magnetic conductive column 142a, the fourth magnetic conductive sheet 152, and the third magnet 153 are disposed on a side of the supporting sheet 151 near the first vibration assembly 11. The second magnetic conductive column 142b, the fourth magnet 154, and the fifth magnetic conductive sheet 155 are disposed on a side of the support sheet 151 near the second vibration assembly 12. In this embodiment, the fixing bracket 141, the third magnet 153, the fourth magnet 154, the first magnetic conductive column 142a, and the second magnetic conductive column 142b may be connected to the support piece 151, respectively, so that the third magnet 153, the fourth magnet 154, the first magnetic conductive column 142a, and the second magnetic conductive column 142b are fixed to the fixing bracket 141 by the support piece 151.

With continued reference to fig. 3, in an embodiment of the present application, the speaker 10 may also include at least one sound guide assembly 16. The sound guide assembly 16 may include a mounting portion 161, and a sound guide portion 162 connected to the mounting portion 161. Specifically, the mounting portion 161 is configured to be connected to a housing of the speaker module to position the speaker 10 in the housing. The connection manner between the mounting portion 161 and the housing is not limited, for example, by screwing, riveting, bonding, welding, etc., and will not be described here again. The sound guide 162 is provided on the peripheral side of the sound cavity 15, and the sound guide 162 is provided with a sound guide channel 163. In this embodiment, the mounting portion 161 may be directly connected with the housing of the speaker module, so that assembly and disassembly of the speaker module may be simplified. The sound guide channel 163 communicates the acoustic cavity 15 with the outside, thereby guiding the sound waves from the acoustic cavity 15 to the outside. In this embodiment, the specific number of sound guide assemblies 16 is not limited, e.g., the speaker 10 may include 1, 2, 3, or 5 sound guide assemblies 16, etc., without specific limitation herein.

Fig. 7 is a schematic diagram of another structure of a speaker according to an embodiment of the present application. In other embodiments, as shown in fig. 7, the at least one sound guide assembly 16 may include a first sound guide assembly 16a and a second sound guide assembly 16b. The speaker 10 employs two sound guide channels 163, namely, a first sound guide channel 163a and a second sound guide channel 163b, to increase the sound output area of the speaker 10, thereby reducing wind noise. The first sound guiding portion 162a of the first sound guiding assembly 16a and the second sound guiding portion 162b of the second sound guiding assembly 16b are disposed on the peripheral side of the sound cavity 15, and the specific position is not limited. For example, in one embodiment, the first sound guiding portion 162a of the first sound guiding assembly 16a and the second sound guiding portion 162b of the second sound guiding assembly 16b may be disposed opposite to each other on two sides of the sound cavity 15, that is, the first sound guiding channel 163a and the second sound guiding channel 163b are disposed at an angle of 180 degrees. Alternatively, in another embodiment, the first sound guide channel 163a and the second sound guide channel 163b may be disposed at an angle of 90 degrees. In other embodiments, the first sound guide channel 163a and the second sound guide channel 163b may be disposed at an included angle of 30, 45, 60, 70, 83, 100, 270, or 300 degrees, and specific values of the included angle are not limited herein, and are not described in detail herein.

In the above-described embodiment, the connection of the mounting portion 161 and the sound guide portion 162 may be a detachable coupling. Alternatively, the mounting portion 161 and the sound guiding portion 162 may be integrally formed, that is, the sound guiding assembly 16 may be integrally formed, so that the structural strength of the sound guiding assembly 16 may be improved, and the manufacturing process of the speaker 10 may be simplified.

Based on the same technical conception, the application also provides a loudspeaker module. Fig. 8 is a schematic structural diagram of a speaker module according to an embodiment of the present application. As shown in fig. 8, the speaker module 80 includes a housing 81, and the speaker 10 of the above embodiment, wherein the speaker 10 is disposed in the housing 81. In the speaker module 80, the first vibration component 11 and the second vibration component 12 are coaxially arranged, and the magnetic circuit component 14 can be shared, so that on one hand, the first vibration component 11 and the second vibration component 12 can vibrate in the axial direction, and on the other hand, the size of the speaker 10 along the axial direction can be reduced, thereby being beneficial to miniaturization of the speaker module 80. And, the first vibration plate 110 and the second vibration plate 120 are coaxially and oppositely disposed, and can simultaneously displace toward the magnetic circuit assembly 14 during vibration, or simultaneously displace away from the magnetic circuit assembly 14, that is, can coaxially vibrate in opposite directions or reversely, so as to increase vibration damping force and counteract reaction force caused by vibration, which is beneficial to improving the acoustic performance of the speaker module 80. In addition, the first vibration plate 110 and the second vibration plate 120 can generate stronger convection air during vibration, so that heat generated by the first vibration assembly 11, the second vibration assembly 12 and the magnetic circuit assembly 14 can be taken away, and the heat dissipation performance of the speaker module 80 can be improved. In the present application, the speaker module 80 can be applied to a vehicle-mounted bass module or a subwoofer module, and miniaturization of the speaker module can be achieved on the basis of ensuring low-frequency sensitivity of the speaker.

As shown in fig. 8, the first vibration assembly 11 and the second vibration assembly 12 share an acoustic chamber 15, i.e., a front chamber formed between the first vibration plate 110 and the second vibration plate 120. In addition, a cavity surrounded by the housing 81 of the speaker module 80, the first vibration plate 110, and the second vibration plate 120 forms the rear cavity 17.

When the speaker 10 includes at least one sound guide assembly 16, the housing 81 may have mounting holes 811 provided corresponding to the sound guide assembly 16. The sound guide member 16 is mounted to the mounting hole 811 so as to communicate the acoustic chamber 15 with the mounting hole 811, and guides the sound wave from the acoustic chamber 15 to the outside. Also, the sound guide assembly 16 can be directly mounted with the housing 81, so that assembly and disassembly of the speaker module 80 can be simplified. As shown in fig. 8, in some embodiments, the speaker 10 may include an acoustic guide assembly 16, with the housing 81 being provided with a mounting hole 811, with the acoustic guide assembly being coupled to the mounting hole 811. Fig. 9 is a schematic diagram of another structure of a speaker module 80 according to an embodiment of the present application. In other embodiments, as shown in fig. 9, the speaker 10 may include a first sound guide assembly 16a and a second sound guide assembly 16b. In this embodiment, the housing 81 may have a first mounting hole 811a and a second mounting hole 811b. The first sound guide assembly 16a is mounted to the first mounting hole 811a, and the second sound guide assembly 16b is mounted to the second mounting hole 811b.

Based on the same technical conception, the application also provides electronic equipment. The electronic device includes a body, and the speaker module 80 of the above embodiment, where the speaker module 80 is disposed on the body. The electronic device is of the type having a speaker module 80. Specifically, the electronic device includes, but is not limited to, an electronic device such as a vehicle-mounted speaker, a television, an intelligent terminal, or an intelligent speaker, and the application of the speaker module 80 is not limited. The electronic device can be miniaturized without affecting the low frequency sensitivity by using the speaker module 80.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes or substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (14)

1. The utility model provides a speaker, its characterized in that includes support piece, first vibration subassembly, second vibration subassembly and magnetic circuit subassembly, first vibration subassembly second vibration subassembly with magnetic circuit subassembly coaxial set up in support piece, wherein:

The first vibration assembly comprises a first vibration plate, the second vibration assembly comprises a second vibration plate, the first vibration plate and the second vibration plate are oppositely arranged, and an acoustic cavity is formed between the first vibration plate and the second vibration plate;

the magnetic circuit assembly is arranged between the first vibration assembly and the second vibration assembly, and the first vibration assembly and the second vibration assembly share the acoustic cavity and the magnetic circuit assembly.

2. The loudspeaker of claim 1, wherein the magnetic circuit assembly comprises a fixed bracket, a magnetizer, and a magnet assembly, wherein the fixed bracket is connected to the support, the magnetizer is connected to the fixed bracket;

the magnetizer is a cylindrical magnetizer, and the cylindrical magnetizer and the first vibration assembly are coaxially arranged;

the magnet assembly is arranged in the cylindrical magnetic conduction body; the magnet assembly comprises a first magnetic conduction sheet, a first magnet, a second magnetic conduction sheet, a second magnet and a third magnetic conduction sheet which are sequentially overlapped along the axial direction, wherein the first magnetic conduction sheet is close to the first vibration assembly, the third magnetic conduction sheet is close to the second vibration assembly, and the magnetizing direction of the first magnet is the same as that of the second magnet.

3. The loudspeaker of claim 2, wherein the cylindrical magnetically permeable body has a first gap between the cylindrical magnetically permeable body and the first magnetically permeable sheet, and a second gap between the cylindrical magnetically permeable body and the third magnetically permeable sheet;

the first vibration assembly further includes a first voice coil inserted into the cylindrical magnetizer through the first gap; the second vibration assembly further includes a second voice coil inserted into the cylindrical magnetizer through the second gap; the diameter of the first voice coil is not equal to the diameter of the second voice coil.

4. A loudspeaker according to claim 2 or 3, wherein the magnetic circuit assembly further comprises a first support sheet;

the cylindrical magnetizer is connected with the fixed bracket, the first supporting piece is arranged between the cylindrical magnetizer and the magnet assembly, and the cylindrical magnetizer and the third magnetic conductive piece are respectively connected with the first supporting piece; or,

the cylindrical magnetizer comprises a first cylinder body and a second cylinder body which are coaxially arranged, and the first cylinder body is arranged close to the first vibration component; the first supporting piece is arranged between the first cylinder body and the second cylinder body and between the second magnetic conduction piece and the second magnet; the fixed support, the first cylinder, the second magnetic conduction sheet and the second magnet are respectively connected with the first supporting sheet.

5. The loudspeaker of claim 1, wherein the magnetic circuit assembly comprises a fixed bracket, a magnetizer, and a magnet assembly, wherein the fixed bracket is connected to the support, the magnetizer is connected to the fixed bracket, and the magnet assembly is connected to the magnetizer;

the magnetizer comprises a first magnetic conduction column and a second magnetic conduction column which are coaxially arranged with the first vibration assembly, the first magnetic conduction column is arranged close to the first vibration assembly, and the second magnetic conduction column is arranged close to the second vibration assembly;

the magnet assembly comprises a fourth magnetic conduction sheet, a third magnet, a fourth magnet and a fifth magnetic conduction sheet which are sequentially overlapped along the axial direction, wherein the fourth magnetic conduction sheet and the third magnet are arranged on the periphery side of the first magnetic conduction column, and the fourth magnetic conduction sheet is arranged close to the first vibration assembly; the fourth magnet and the fifth magnetic conduction sheet are arranged on the periphery of the second magnetic conduction column, and the fifth magnetic conduction sheet is arranged close to the second vibration assembly; the magnetizing direction of the third magnet is the same as the magnetizing direction of the fourth magnet.

6. The loudspeaker of claim 5, wherein a third gap is provided between the first magnetically permeable post and the fourth magnetically permeable sheet, and a fourth gap is provided between the second magnetically permeable post and the fifth magnetically permeable sheet;

The first vibration assembly further comprises a third voice coil, and the third voice coil is inserted between the first magnetic conduction column and the third magnet through the third gap; the second vibration assembly further comprises a fourth voice coil, and the fourth voice coil is inserted between the second magnetic conduction column and the fourth magnet through the fourth gap; the diameter of the third voice coil is not equal to the diameter of the fourth voice coil.

7. The loudspeaker of claim 6, wherein the magnetic circuit assembly further comprises a second support sheet; the first magnetic conduction column, the fourth magnetic conduction sheet and the third magnet are arranged on one side of the second supporting sheet, which is close to the first vibration assembly, and the second magnetic conduction column, the fourth magnet and the fifth magnetic conduction sheet are arranged on one side of the second supporting sheet, which is close to the second vibration assembly; the fixed support, the third magnet, the fourth magnet, the first magnetic conduction column and the second magnetic conduction column are respectively connected with the second supporting piece.

8. The speaker of any one of claims 1 to 7, further comprising at least one sound guide assembly including a mounting portion for connection with a housing of a speaker module and a sound guide portion connected with the mounting portion and disposed on a peripheral side of the sound cavity; the sound guide part is provided with a sound guide channel which is communicated with the sound cavity and the outside.

9. The loudspeaker of claim 8, wherein the at least one sound guide assembly comprises a first sound guide assembly and a second sound guide assembly, the sound guide portions of the first sound guide assembly and the second sound guide assembly being disposed opposite sides of the acoustic cavity.

10. A loudspeaker according to claim 8 or 9, wherein the mounting portion is of unitary construction with the sound guide portion.

11. A loudspeaker according to any one of claims 1 to 10, wherein the size of the first vibration assembly is equal to the size of the second vibration assembly.

12. A speaker module comprising a housing, and a speaker according to any one of claims 1 to 11, wherein the speaker is disposed within the housing.

13. The speaker module of claim 12, wherein the housing has mounting holes corresponding to the sound guide assembly when the speaker includes at least one sound guide assembly, the sound guide assembly being mounted to the mounting holes.

14. An electronic device, comprising a body, and the speaker module of claim 12 or 13, wherein the speaker module is disposed on the body.