Loudspeaker and electronic equipment

Abstract

The invention relates to a loudspeaker and electronic equipment, and the loudspeaker comprises a housing and at least two sound production units, the at least two sound production units are installed in the housing, and the sound production frequency bands of different sound production units are at least partially different. Therefore, a mode of fixing each sound production unit by adding a support and other structures is replaced, so that the overall structure of the loudspeaker is simpler and more compact, the occupation of the internal space of the loudspeaker is reduced, and the miniaturization design of the loudspeaker is facilitated.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of electronic devices, and in particular, to a loudspeaker and an electronic device. BACKGROUND

[0002] The loudspeaker is an important component of electronic devices such as earphones. With the increasing demand of users for sound quality of loudspeakers, double-frequency combination loudspeakers have gradually appeared on the market. However, the double-frequency combination loudspeakers in the related art have the problems of complex overall structure and large space occupation. SUMMARY

[0003] To overcome the problems in the related art, the present disclosure provides a loudspeaker and an electronic device.

[0004] According to a first aspect of the present disclosure, a loudspeaker is provided, which comprises a housing, and at least two sound generating units, each of which is mounted on the housing, and sound generating frequency bands of different sound generating units are at least partially different.

[0005] In some embodiments of the present disclosure, the at least two sound generating units comprise a first sound generating unit, which comprises a diaphragm, an edge of the diaphragm is fixed on the housing, and a sound outlet cavity is formed between the housing and the diaphragm.

[0006] In some embodiments of the present disclosure, the at least two sound generating units further comprise at least one second sound generating unit, which is arranged in the sound outlet cavity and fixedly connected with an inner wall surface of the housing; and / or at least one third sound generating unit, which is arranged outside the sound outlet cavity and fixedly connected with an outer wall surface of the housing.

[0007] In some embodiments of the present disclosure, the housing comprises a top wall and a side wall connected with each other, the top wall is opposite to the diaphragm, an edge of the diaphragm is connected with the side wall, and the second sound generating unit and the third sound generating unit are respectively located on the inner and outer sides of the top wall.

[0008] In some embodiments of the present disclosure, the third sound generating unit comprises a piezoelectric component, which comprises a substrate and a piezoelectric element arranged on the substrate, the substrate is arranged on the top wall, and the piezoelectric element is used to receive a sound generating signal and drive the substrate to vibrate according to the sound generating signal; or the third sound generating unit comprises a piezoelectric component, which comprises a piezoelectric element arranged on the top wall, and the piezoelectric element is used to receive a sound generating signal and drive the top wall to vibrate according to the sound generating signal.

[0009] In some embodiments of the present disclosure, a groove is arranged on a first region of the top wall, and the second sound generating unit is accommodated in the groove.

[0010] In some embodiments of the present disclosure, the third sound production unit is arranged outside the bottom wall of the groove, and a first sound outlet hole is arranged on the bottom wall of the groove and penetrates the third sound production unit.

[0011] In some embodiments of the present disclosure, the second area of the top wall is provided with a second sound outlet hole.

[0012] In some embodiments of the present disclosure, the first sound production unit is a moving coil sound production unit; and / or, the second sound production unit is a planar diaphragm sound production unit; and / or, the third sound production unit is a piezoelectric ceramic sound production unit.

[0013] In some embodiments of the present disclosure, the sound production frequency range of the first sound production unit includes 20Hz-10kHz, the sound production frequency range of the second sound production unit includes 5kHz-20kHz, and the sound production frequency range of the third sound production unit includes 10kHz-48kHz; and the total frequency range of the sound production frequency ranges of the first sound production unit, the second sound production unit and the third sound production unit is 20Hz-48kHz.

[0014] In some embodiments of the present disclosure, the at least two sound production units are arranged coaxially.

[0015] In some embodiments of the present disclosure, the loudspeaker further comprises a circuit board, and each sound production unit is electrically connected to the circuit board.

[0016] In some embodiments of the present disclosure, the circuit board comprises a flexible circuit board, and the flexible circuit board is attached to the shell.

[0017] In some embodiments of the present disclosure, each sound production unit is provided with an electrical connection part, each electrical connection part is located at the same position in the circumferential direction of the loudspeaker, and the flexible circuit board is electrically connected to each electrical connection part.

[0018] In some embodiments of the present disclosure, a second sound production unit of the at least two sound production units comprises a main body, an electrical connection part of the second sound production unit is arranged on one side of the main body, a groove on the top wall of the shell comprises a first groove side wall arranged around a part of the outer periphery of the main body and a second groove side wall corresponding to the position of the electrical connection part of the second sound production unit, an inner surface of the second groove side wall is a plane, and the flexible circuit board is attached to the inner surface of the second groove side wall and electrically connected to the electrical connection part of the second sound production unit.

[0019] According to a second aspect of the present disclosure, an electronic device is provided, which comprises the loudspeaker according to the first aspect.

[0020] The technical solutions provided by the embodiments of the present disclosure can have the following beneficial effects:

[0021] The loudspeaker provided by the present disclosure is provided with at least two sound units, the sound frequency bands of different sound units are at least partially different, so that the overall sound frequency band of the loudspeaker can be expanded, and the sound effect of the loudspeaker is effectively improved. In addition, the at least two sound units are both mounted on the shell, so that the overall structure of the loudspeaker is more simple and compact, the occupation of the internal space of the loudspeaker is saved, and thus the miniaturization design of the loudspeaker is facilitated.

[0022] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0024] Figure 1 is a cross-sectional schematic view of a loudspeaker according to an exemplary embodiment;

[0025] Figure 2 is a frequency response diagram of each sound unit of a loudspeaker according to an exemplary embodiment.

[0026] In the drawings:

[0027] 1 - loudspeaker; 11 - shell; 111 - top wall; 112 - side wall; 113 - groove; 1131 - bottom wall; 1132 - first slot side wall; 1133 - second slot side wall; 12 - first sound unit; 121 - diaphragm; 122 - sound cavity; 123 - first electrical connection part; 124 - magnetic circuit assembly; 125 - voice coil; 13 - second sound unit; 131 - second electrical connection part; 14 - third sound unit; 141 - third electrical connection part; 15 - flexible circuit board; 16 - first sound hole; 17 - second sound hole. DETAILED DESCRIPTION

[0028] The exemplary embodiments will be described in detail herein with reference to the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present disclosure. Instead, they are merely examples of apparatuses and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0029] The loudspeaker is an important component of electronic devices such as earphones. With the increasing demand of users for sound quality of loudspeakers, double-frequency combination loudspeakers have gradually appeared on the market. Currently, double-frequency combination loudspeakers usually combine a piezoelectric ceramic sound unit and a moving coil sound unit to produce high-frequency and full-frequency sound, respectively, thereby expanding the overall sound frequency range of the loudspeaker and improving the resolution of high-frequency sound, so as to effectively improve the overall sound quality of the loudspeaker.

[0030] However, the double-frequency combination loudspeaker in the related art has the problems of complex overall structure and large space occupation. For example, the loudspeaker in the related art includes a shell, a piezoelectric ceramic sound unit, a moving coil sound unit, and a bracket. The bracket is fixed inside the shell, and the piezoelectric ceramic sound unit and the moving coil sound unit are both arranged on the bracket to be assembled in the shell by the bracket. Such a setting form not only leads to a complex overall structure of the loudspeaker, but also increases the occupation of the internal space of the loudspeaker due to the arrangement of the bracket, which is not conducive to the miniaturization design of the loudspeaker.

[0031] To solve the above technical problems, the present disclosure provides a loudspeaker, which is provided with at least two sound units. The sound frequency ranges of different sound units are at least partially different, so as to expand the overall sound frequency range of the loudspeaker and effectively improve the sound quality of the loudspeaker. In addition, the at least two sound units are both mounted in the shell. In this way, instead of fixing each sound unit by adding a bracket or the like, the overall structure of the loudspeaker is more simple and compact, the occupation of the internal space of the loudspeaker is saved, and the miniaturization design of the loudspeaker is facilitated.

[0032] An example embodiment of the present disclosure provides a loudspeaker, as shown in Figure 1 The loudspeaker 1 includes a shell 11 and at least two sound units. For example, the loudspeaker 1 can be provided with only two sound units, or more than two sound units. The sound frequency ranges of different sound units are at least partially different. For example, the sound frequency ranges of different sound units can be partially different, such as having an intersection between the sound frequency ranges of two different sound units, or the sound frequency ranges of different sound units can be all different. In this way, the overall sound frequency range of the loudspeaker 1 can be expanded, thereby effectively improving the sound quality of the loudspeaker 1.

[0033] In addition, the at least two sound units are both mounted in the shell 11. By adopting such a setting form, instead of fixing each sound unit by adding a bracket or the like, the overall structure of the loudspeaker 1 is more simple and compact, the occupation of the internal space of the loudspeaker 1 is saved, and the miniaturization design of the loudspeaker 1 is facilitated.

[0034] In an embodiment, in combination with Figure 1The at least two sound generating units include the first sound generating unit 12, and the first sound generating unit 12 includes a diaphragm 121, and an edge of the diaphragm 121 is fixed on the shell 11. Exemplarily, the edge of the diaphragm 121 is fixed on the shell 11 in the form of gluing. A sound outlet cavity 122 is formed between the shell 11 and the diaphragm 121. By arranging the shell 11, not only the diaphragm 121 can be protected, thereby improving the reliability of the loudspeaker 1, but also the sound outlet cavity 122 formed between the shell 11 and the diaphragm 121 can enhance the sound waves emitted by the first sound generating unit 12, thereby effectively improving the clarity of the sound waves emitted by the first sound generating unit 12, which is helpful to improve the sound quality of the loudspeaker 1.

[0035] In an embodiment, in combination with Figure 1 The at least two sound generating units include the first sound generating unit 12, and at least one second sound generating unit 13. Exemplarily, the at least two sound generating units can be one first sound generating unit 12 and one second sound generating unit 13, or one first sound generating unit 12 and a plurality of second sound generating units 13 in combination. The second sound generating unit 13 is arranged in the sound outlet cavity 122 and is fixedly connected with the inner wall surface of the shell 11. By adopting such an arrangement, on the one hand, the first sound generating unit 12 and the second sound generating unit 13 can share the shell 11, thereby saving the use of the shell 11, effectively reducing the stacking height between the first sound generating unit 12 and the second sound generating unit 13, and further facilitating the miniaturization design of the loudspeaker 1. On the other hand, the sound emitted by the first sound generating unit 12 and the sound emitted by the second sound generating unit 13 can be superimposed in space, thereby further improving the sound effect of the loudspeaker 1.

[0036] In another embodiment, in combination with Figure 1 The at least two sound generating units include the first sound generating unit 12, and at least one third sound generating unit 14. Exemplarily, the at least two sound generating units can be one first sound generating unit 12 and one third sound generating unit 14, or one first sound generating unit 12 and a plurality of third sound generating units 14 in combination. The third sound generating unit 14 is arranged outside the sound outlet cavity 122 and is fixedly connected with the outer wall surface of the shell 11. By adopting such an arrangement, the first sound generating unit 12 and the third sound generating unit 14 can share the shell 11, thereby saving the use of the shell 11, effectively reducing the stacking height between the first sound generating unit 12 and the third sound generating unit 14, reducing the volume of the loudspeaker 1, and further facilitating the miniaturization design of the loudspeaker 1.

[0037] In still another embodiment, in combination with Figure 1The at least two sound emitting units include the first sound emitting unit 12, and further include at least one second sound emitting unit 13 and at least one third sound emitting unit 14. Exemplarily, the at least two sound emitting units can be a combination of one first sound emitting unit 12, one second sound emitting unit 13 and one third sound emitting unit 14, or a combination of one first sound emitting unit 12, a plurality of second sound emitting units 13 and one third sound emitting unit 14, or a combination of one first sound emitting unit 12, one second sound emitting unit 13 and a plurality of third sound emitting units 14, or a combination of one first sound emitting unit 12, a plurality of second sound emitting units 13 and a plurality of third sound emitting units 14, which are not limited herein. By combining the three different sound emitting units, the sound effect of the loudspeaker 1 can be further enhanced, and the user experience is improved.

[0038] The second sound emitting unit 13 is arranged in the sound emitting cavity 122 and fixedly connected with the inner wall surface of the shell 11, and the third sound emitting unit 14 is arranged outside the sound emitting cavity 122 and fixedly connected with the outer wall surface of the shell 11. In this way, the first sound emitting unit 12, the second sound emitting unit 13 and the third sound emitting unit 14 can share the shell 11, reducing the use of the shell 11, so that the structure of the loudspeaker 1 is more compact, the volume of the loudspeaker 1 is reduced, and the miniaturization design of the loudspeaker 1 is facilitated. In addition, the sound emitted by the first sound emitting unit 12 and the sound emitted by each second sound emitting unit 13 can coincide in space, so that the sound effect can be further improved.

[0039] In an embodiment, the first sound emitting unit 12, the second sound emitting unit 13 and the third sound emitting unit 14 are combined to form a sound emitting unit group. Figure 1 The shell 11 includes a top wall 111 and a side wall 112 connected with each other, the top wall 111 is opposite to the diaphragm 121, the edge of the diaphragm 121 is connected with the side wall 112, and the diaphragm 121, the side wall 112 and the top wall 111 jointly form the sound emitting cavity 122. The second sound emitting unit 13 and the third sound emitting unit 14 are respectively located on the inner and outer sides of the top wall 111. It can be understood that the side of the top wall 111 facing the sound emitting cavity 122 is the inner side of the top wall 111, and the side of the top wall 111 away from the sound emitting cavity 122 is the outer side of the top wall 111. By adopting such a setting form, on the one hand, the structure of the loudspeaker 1 is simple, which is convenient for assembly, so that the production efficiency can be improved. On the other hand, the above setting form makes the structure of the loudspeaker 1 more compact, so that the volume of the loudspeaker 1 can be effectively reduced.

[0040] In one embodiment, the third sound-emitting unit 14 includes a piezoelectric assembly, which includes a base and a piezoelectric element disposed on the base. The base is disposed on the top wall 111, for example, by gluing the base to the top wall 111. The piezoelectric element receives an acoustic signal and drives the base to vibrate in response to the acoustic signal. The third sound-emitting unit 14 generates sound through the vibration of the base. For example, a gap is formed between the base and the top wall 111 to prevent the base from colliding with the top wall 111 during vibration, thereby improving the reliability of the third sound-emitting unit 14.

[0041] In the related art, when assembling the third sound unit 14, glue is applied to the base of the third sound unit 14 to secure the base to an external component (such as a housing, substrate, etc.). However, the amount of glue applied to the base and the bonding area are difficult to control consistently, which can lead to a discrete acoustic performance of the third sound unit 14 and reduce the sound quality of the speaker 1. Based on this, in another embodiment, the third sound unit 14 includes a piezoelectric assembly, which includes a piezoelectric element disposed on the top wall 111. The piezoelectric element is used to receive an acoustic signal and drive the top wall 111 to vibrate according to the acoustic signal. The third sound unit 14 produces sound through the vibration of the top wall 111. By directly disposing the piezoelectric element on the top wall 111, the top wall 111 serves as a base that vibrates with the piezoelectric element, eliminating the need for a base. This allows the base of the third sound unit 14 to be shared with the housing 11 of the first sound unit 12, thereby making the structure of the speaker 1 more compact and further reducing the size of the speaker 1. In addition, the third sound unit 14 in this embodiment does not need to be provided with a base, and there is no need to fix the base with glue, which can effectively improve the consistency of the vibration area of ​​the top wall 111, thereby improving the consistency of the acoustic performance of the third sound unit 14, and further enhancing the sound effect of the speaker 1.

[0042] In one embodiment, combining Figure 1 The first area of ​​the top wall 111 is provided with a groove 113, and the second sound unit 13 is accommodated in the groove 113. For example, the second sound unit 13 and the groove side wall of the groove 113 (for example Figure 1 The first groove sidewalls 1132 shown in the figure are connected and fixed by gluing. For example, after the second sound unit 13 is placed in the groove 113, glue is poured into the gap formed between the second sound unit 13 and the groove sidewalls of the groove 113 to achieve the fixation and sealing of the second sound unit 13. This design, on the one hand, not only facilitates the fixation of the second sound unit 13 and improves the convenience during assembly, but also, by providing the groove 113, it can also serve as a limit for the second sound unit 13, preventing the second sound unit 13 from shifting under external factors, thereby improving the stability of the second sound unit 13.

[0043] In one embodiment, combining Figure 1The third sound unit 14 is arranged outside the bottom wall 1131 of the groove 113, so that the third sound unit 14 does not interfere with the second sound unit 13, and the structure of the loudspeaker 1 is more compact, and the volume of the loudspeaker 1 is reduced. The first sound hole 16 is arranged on the bottom wall 1131 of the groove 113, and the first sound hole 16 penetrates the third sound unit 14. The sound waves emitted by the second sound unit 13 arranged in the groove 113 flow out from the first sound hole 16, so that the normal sound emission of the second sound unit 13 is ensured.

[0044] In an embodiment, the loudspeaker 1 further comprises a first sound unit 12 arranged in the groove 113. Figure 1 The second region of the top wall 111 is provided with a second sound hole 17. It should be noted that the first region of the top wall 111 is provided with the groove 113, and the other regions outside the groove 113 are the second region of the top wall 111. In this way, on the one hand, the second sound hole 17 is arranged on the second region of the top wall 111, so that the second sound unit 13 does not block the second sound hole 17, and the sound waves emitted by the first sound unit 12 can flow out from the second sound hole 17, so that the normal sound emission of the first sound unit 12 is ensured. On the other hand, the top wall 111 is opposite to the diaphragm 121 of the first sound unit 12, and then the second sound hole 17 on the top wall 111 is also opposite to the diaphragm 121 of the first sound unit 12, so that the air flow caused by the vibration of the diaphragm 121 is discharged, the loss of sound effect caused by the poor vibration air flow is avoided, and the sound effect of the loudspeaker 1 is further improved.

[0045] In an embodiment, the first sound unit 12 is a moving coil sound unit. For example, the moving coil sound unit comprises a magnetic circuit assembly 124 composed of a bobbin, a magnet and the like, and a vibration assembly composed of a diaphragm 121 and a voice coil 125. The voice coil 125 is connected to the diaphragm 121. When an electric current passes through the voice coil 125, an electromagnetic field is generated, which interacts with the magnetic field generated by the magnetic circuit assembly 124, so that the voice coil 125 vibrates, and the diaphragm 121 vibrates driven by the voice coil 125, thereby emitting sound. The moving coil sound unit has the advantages of good low frequency performance and multi-level listening, so as to improve the low frequency performance of the loudspeaker 1.

[0046] In an embodiment, the second sound unit 13 is a planar diaphragm sound unit. Exemplarily, the planar diaphragm sound unit has a generally flat shape, and the outer periphery of the planar diaphragm sound unit can be directly connected to the shell 11 when the planar diaphragm sound unit is assembled. The sound of the planar diaphragm sound unit is generated by a very thin and light diaphragm by balanced vibration, and the magnetic field system of the planar diaphragm sound unit is symmetrically distributed with wires, and the diaphragm is uniformly pushed, so that the maximum sensitivity and consistency can be achieved, so that the planar diaphragm sound unit can be used as a low-frequency unit and can also be used as a mid-high frequency unit. Therefore, the planar diaphragm sound unit as the second sound unit 13 is beneficial to improve the overall performance of the loudspeaker 1. Exemplarily, the planar diaphragm sound unit in the embodiment adopts a circular planar diaphragm, which can achieve an extreme design with a diameter less than 5.5 mm and a height less than 1.15 mm, thereby facilitating further reduction in the size of the loudspeaker 1 and facilitating miniaturization design of the loudspeaker 1.

[0047] In another embodiment, the second sound unit 13 is a planar diaphragm sound unit, which includes a planar diaphragm and a support for supporting the planar diaphragm. Exemplarily, the planar diaphragm is circular, and correspondingly, the support is a ring-shaped support matched with the planar diaphragm, and the ring-shaped support is connected to the outer edge of the planar diaphragm. The planar diaphragm is connected to the shell 11 by the support, thereby achieving the fixation between the second sound unit 13 and the shell 11. With such a setting form, the stability of the planar diaphragm sound unit can be effectively improved, thereby further improving the reliability of the loudspeaker 1.

[0048] In an embodiment, the third sound unit 14 is a piezoelectric ceramic sound unit. Exemplarily, the piezoelectric ceramic sound unit mainly includes a piezoelectric element and a substrate connected with the piezoelectric element, and the piezoelectric element generates vibration by piezoelectric effect and transmits the vibration to the substrate for sound generation. The piezoelectric ceramic sound unit has good high-frequency performance, thereby being capable of improving the mid-high frequency performance of the loudspeaker 1. It should be noted that the piezoelectric effect refers to that when subjected to a harmonic electric field, the compression and dilution of the piezoelectric material in the surrounding fluid medium (such as air, etc.) alternately changes, thereby vibrating to generate sound.

[0049] In an embodiment, the first sound unit 12 is a moving coil sound unit, the second sound unit 13 is a planar diaphragm sound unit, and the third sound unit 14 is a piezoelectric ceramic sound unit. Such a design makes the loudspeaker 1 capable of simultaneously considering the acoustic performance of low, medium and high frequency bands, thereby being capable of further improving the sound effect of the loudspeaker 1 and improving the user experience.

[0050] In an embodiment, the first sound unit 12 is a moving coil sound unit, the second sound unit 13 is a planar diaphragm sound unit, and the third sound unit 14 is a piezoelectric ceramic sound unit. Such a design makes the loudspeaker 1 capable of simultaneously considering the acoustic performance of low, medium and high frequency bands, thereby being capable of further improving the sound effect of the loudspeaker 1 and improving the user experience. Figure 2 , Figure 2The frequency response curves of the first sound generating unit 12, the second sound generating unit 13 and the third sound generating unit 14 are combined, so that the total frequency band of the sound generating frequency band of the loudspeaker 1 achieves a physical bandwidth of 20 Hz to 48 kHz. In this way, the sound generating frequency band of the loudspeaker 1 is expanded by combining the three sound generating units, and the acoustic performance of the low, medium and high frequency bands can be considered at the same time, so that the sound effect of the loudspeaker 1 can be further improved.

[0051] The sound generating frequency band of the first sound generating unit 12 includes 20 Hz to 10 kHz, the sound generating frequency band of the second sound generating unit 13 includes 5 kHz to 20 kHz, and the sound generating frequency band of the third sound generating unit 14 includes 10 kHz to 48 kHz. In this way, the first sound generating unit 12 generates low-frequency sound waves, the second sound generating unit 13 generates medium-frequency sound waves, and the third sound generating unit 14 generates high-frequency sound waves, so that the acoustic performance of the low, medium and high frequency bands can be considered at the same time, thereby effectively improving the overall performance of the loudspeaker 1.

[0052] For example, the moving coil sound generating unit in the related art usually adopts a structure in which the center of the diaphragm 121 is outwardly convex to form a dome to emit high-frequency sound waves. In the present embodiment, when the first sound generating unit 12 is a moving coil sound generating unit, the second sound generating unit 13 and the third sound generating unit 14 can achieve the acoustic performance of medium and high frequencies, so the first sound generating unit 12 does not need to consider high-frequency extension, and the diaphragm 121 of the first sound generating unit 12 does not need to be outwardly convex to form a dome, thereby further reducing the occupied space of the first sound generating unit 12 inside the shell 11, and facilitating further reduction of the volume of the loudspeaker 1.

[0053] In an embodiment, the at least two sound generating units are coaxially arranged. Figure 1 For example, only two sound generating units can be coaxially arranged, or all sound generating units can be coaxially arranged. By adopting such a setting form, the sound emitting positions of the coaxially arranged sound generating units are located on the same axis, so that the mutual interference of the sound generating units during sound emission can be effectively avoided, and the propagation distance of the sound waves can be maximally reduced to avoid the loss of sound effect caused by the long propagation distance of the sound waves, thereby improving the sound effect of the loudspeaker 1.

[0054] In an embodiment, the loudspeaker 1 further includes a circuit board, which can be a printed circuit board (PCB) board, a flexible printed circuit (FPC) board, or a combination of a PCB board and an FPC board. Each sound generating unit is electrically connected to the circuit board. For example, the circuit board can be electrically connected to the control part of the loudspeaker 1, so that the control of each sound generating unit can be realized.

[0055] In an embodiment, the circuit board is provided with at least two electrical devices, each of which corresponds to and is electrically connected to each sound generating unit. In this way, the electrical devices on the circuit board can be used to control each sound generating unit individually, thereby achieving a frequency division design of the loudspeaker 1, so that each sound generating unit does not interfere with each other, and thus the sound emitted by the loudspeaker 1 is more pure, and the loudness of the loudspeaker 1 is improved.

[0056] In another embodiment, the loudspeaker 1 further comprises a control unit, which can be a main chip of the loudspeaker 1, for example. The circuit board is electrically connected to the control unit, and the control unit is used to control the sound generating frequency of each sound generating unit respectively. In this way, a frequency division design of the loudspeaker 1 is achieved, so that each sound generating unit does not interfere with each other, and thus the sound emitted by the loudspeaker 1 is more pure, and the loudness of the loudspeaker 1 is improved.

[0057] In an embodiment, in combination with Figure 1 The circuit board comprises a flexible circuit board 15 which is attached to the housing 11. In this way, the space occupied by the circuit board inside the loudspeaker 1 can be reduced, which is conducive to further reducing the volume of the loudspeaker 1.

[0058] In an embodiment, in combination with Figure 1 Each sound generating unit is provided with an electrical connection part, for example, the electrical connection part comprises a first electrical connection part 123 provided on the first sound generating unit 12, a second electrical connection part 131 provided on the second sound generating unit 13, and a third electrical connection part 141 provided on the third sound generating unit 14. Each electrical connection part is located at the same position in the circumferential direction of the loudspeaker 1, and the flexible circuit board 15 is electrically connected to each electrical connection part. With such a setting form, the flexible circuit board 15 can be electrically connected to each electrical connection part at the same time, thereby improving the assembly convenience of the loudspeaker 1.

[0059] When the second sound generating unit 13 is a planar diaphragm sound generating unit, the conventional electrical connection part is usually arranged at the top of the second sound generating unit 13, which increases the overall height of the second sound generating unit 13. Based on this, in an embodiment, in combination with Figure 1The second sound production unit 13 of the at least two sound production units comprises a main body, and the second electrical connection part 131 of the second sound production unit 13 is arranged on one side of the main body. In this way, the flexible circuit board 15 and the second electrical connection part 131 are electrically connected, and the height space of the loudspeaker 1 is further saved, which is beneficial to further reduce the volume of the loudspeaker 1. The groove 113 on the top wall 111 of the shell 11 comprises a first groove side wall 1132 arranged around a part of the outer periphery of the main body and a second groove side wall 1133 corresponding to the position of the second electrical connection part 131 of the second sound production unit 13. The inner surface of the second groove side wall 1133 is a plane, and the flexible circuit board 15 is attached to the inner surface of the second groove side wall 1133 and is electrically connected with the second electrical connection part 131 of the second sound production unit 13. In this way, the flexible circuit board 15 is prevented from being damaged by being poked, thereby ensuring the reliability of the loudspeaker 1.

[0060] An example embodiment of the present disclosure provides an electronic device, which can be a mobile device with a loudspeaker, such as a headset (e.g., a Bluetooth headset, an in-ear headset, a semi-in-ear headset, a True Wireless Stereo (TWS) headset, etc.), a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted electronic device, a wearable device, an ultra-mobile personal computer (UMPC), a netbook, or a personal digital assistant (PDA), etc., or a non-mobile device with a loudspeaker, such as a personal computer (PC), a television (TV), a cashier machine, or a self-service machine, etc.

[0061] The electronic device comprises the loudspeaker 1 as described above. As shown in Figure 1 The loudspeaker 1 comprises the shell 11 and at least two sound production units. The sound production frequency bands of different sound production units are at least partially different, and the sound production frequency bands of different sound production units can be partially different, for example. In this way, the overall sound production frequency band of the loudspeaker 1 can be expanded, thereby effectively improving the sound effect of the loudspeaker 1.

[0062] In addition, the at least two sound production units are mounted on the shell 11. In this way, instead of fixing each sound production unit by adding a support or the like, the overall structure of the loudspeaker 1 is more simple and compact, the internal space of the loudspeaker 1 is saved, and the miniaturization design of the loudspeaker 1 is facilitated.

[0063] Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the features disclosed herein. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

[0064] It should be understood that the present disclosure is not limited to the precise structures as herein described and illustrated in the drawings, and that various modifications and changes can be made without departing from its scope. The scope of the present disclosure is limited only by the claims that follow.

Claims

1. A loudspeaker, characterized by The loudspeaker comprises: a housing; at least two sound units, each of the at least two sound units being mounted on the housing, and sound frequency bands of different sound units being at least partially different.

2. The loudspeaker of claim 1, wherein, The at least two sound units comprise a first sound unit, the first sound unit comprising a diaphragm, an edge of the diaphragm being fixed on the housing, and a sound cavity being formed between the housing and the diaphragm.

3. The loudspeaker of claim 2, wherein, The at least two sound units further comprise: at least one second sound unit, the second sound unit being arranged in the sound cavity and fixedly connected with an inner wall surface of the housing; and / or, at least one third sound unit, the third sound unit being arranged outside the sound cavity and fixedly connected with an outer wall surface of the housing.

4. The loudspeaker of claim 3, wherein, The housing comprises a top wall and a side wall connected with each other, the top wall being opposite to the diaphragm, an edge of the diaphragm being connected with the side wall, and the second sound unit and the third sound unit being respectively located on the inner and outer sides of the top wall.

5. The loudspeaker of claim 4, wherein, The third sound unit comprises a piezoelectric assembly, the piezoelectric assembly comprising a substrate and a piezoelectric element arranged on the substrate, the substrate being arranged on the top wall, and the piezoelectric element being used for receiving a sound signal and driving the substrate to vibrate according to the sound signal. Alternatively, The third sound unit comprises a piezoelectric assembly, the piezoelectric assembly comprising a piezoelectric element arranged on the top wall, and the piezoelectric element being used for receiving a sound signal and driving the top wall to vibrate according to the sound signal.

6. The loudspeaker of claim 4, wherein, A first region of the top wall is provided with a groove, and the second sound unit is accommodated in the groove.

7. The loudspeaker of claim 6, wherein, The third sound unit is arranged outside a bottom wall of the groove, a first sound hole is arranged on the bottom wall of the groove, and the first sound hole penetrates through the third sound unit.

8. The loudspeaker of claim 6, wherein, A second region of the top wall is provided with a second sound hole.

9. The loudspeaker of any one of claims 3 to 8, wherein, The first sound unit is a moving coil sound unit. Alternatively, The second sound unit is a planar diaphragm sound unit. Alternatively, The third sound unit is a piezoelectric ceramic sound unit.

10. The loudspeaker of any one of claims 3 to 8, wherein, The sound frequency band of the first sound unit comprises 20 Hz to 10 kHz, the sound frequency band of the second sound unit comprises 5 kHz to 20 kHz, and the sound frequency band of the third sound unit comprises 10 kHz to 48 kHz. The total frequency band of the sound frequency bands of the first sound unit, the second sound unit and the third sound unit is 20 Hz to 48 kHz.

11. The loudspeaker of any one of claims 1 to 8, wherein, The at least two sound units are coaxially arranged.

12. The loudspeaker of any one of claims 1 to 8, wherein, The loudspeaker further comprises: a circuit board, each of the sound units being electrically connected with the circuit board.

13. The loudspeaker of claim 12, wherein, The circuit board comprises a flexible circuit board, and the flexible circuit board is attached to the housing.

14. The loudspeaker of claim 13, wherein, Each of the sound units is provided with an electrical connection part, each of the electrical connection parts is located at a same position in a circumferential direction of the loudspeaker, and the flexible circuit board is electrically connected with each of the electrical connection parts.

15. The loudspeaker according to claim 14, characterized in that The second sound production unit of the at least two sound production units comprises a main body, an electrical connection part of the second sound production unit is arranged on one side of the main body, the groove on the top wall of the shell comprises a first groove side wall arranged around a part of the outer periphery of the main body and a second groove side wall corresponding to the position of the electrical connection part of the second sound production unit, an inner surface of the second groove side wall is a plane, and the flexible circuit board is attached to the inner surface of the second groove side wall and is electrically connected with the electrical connection part of the second sound production unit.

16. An electronic device, comprising: The electronic device comprises the loudspeaker as claimed in any one of claims 1 to 15.

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