A loudspeaker and electronic device

Abstract

The utility model discloses a kind of loudspeaker and electronic equipment, the loudspeaker includes: center magnetic part and edge magnetic part, edge magnetic part is set around center magnetic part, edge magnetic part and center groove structure have first annular gap between, center magnetic part has first side and second side of opposite, second side has second annular gap;First vibration system, including first voice coil and first diaphragm, first voice coil is located in first annular gap, first diaphragm is opposite with the first side of center magnetic part, the edge of first diaphragm is connected with first voice coil;Second vibration system, including second voice coil and second diaphragm, second voice coil is located in second annular gap, and it is set around the inner side wall of second annular gap, second diaphragm is opposite with the second side of center magnetic part, the edge of second diaphragm is connected with second voice coil.The loudspeaker combines high-frequency loudspeaker, loudspeaker into one, reduce cost, greatly save installation space.

Description

Technical Field

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

[0002] The mainstream technology for speaker placement in electronic devices now is to design high and low frequency speakers separately, with two different speaker units and two separate power amplifier chips. This speaker placement structure is costly and takes up a lot of space, which will affect the overall stacking and thinning of electronic devices. Utility Model Content

[0003] This invention provides a loudspeaker and an electronic device. The loudspeaker combines a tweeter and a woofer into one, with fewer additional components, reducing costs and saving installation space. It is especially suitable for electronic devices with high space requirements.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A loudspeaker, comprising:

[0006] A power system includes a central magnetic part and an edge magnetic part, the edge magnetic part being disposed around the central magnetic part, a first annular gap being between the edge magnetic part and the central magnetic part, the central magnetic part having a first side and a second side facing away from each other, the second side having a second annular gap;

[0007] A first vibration system includes a first voice coil and a first diaphragm. The first voice coil is located within the first annular gap and is disposed around the central magnetic portion. The first diaphragm is opposite to a first side of the central magnetic portion, and the edge of the first diaphragm is connected to the first voice coil.

[0008] The second vibration system includes a second voice coil and a second diaphragm. The second voice coil is located within the second annular gap and is disposed around the inner sidewall of the second annular gap. The second diaphragm is opposite to the second side of the central magnet and the edge of the second diaphragm is connected to the second voice coil.

[0009] Optionally, the central magnetic part includes a central magnet, a first central pole piece, and a second central pole piece;

[0010] The first central pole piece is located on the side of the central magnet facing the first diaphragm;

[0011] The second central pole piece is located on the side of the central magnet facing the second diaphragm, and the orthographic projection of the second central pole piece onto the central magnet is located in the area surrounded by the inner sidewall of the second annular gap.

[0012] Optionally, the edge magnet includes an edge magnet and an annular pole piece;

[0013] The edge magnets are arranged around the central magnetic part;

[0014] The annular pole piece is located on the side of the edge magnet facing the first diaphragm.

[0015] Optionally, the power system further includes a support frame located on the side of the edge magnet facing the first diaphragm and disposed around the second annular gap;

[0016] The first vibration system further includes a first folded ring, which surrounds the first diaphragm. The inner edge of the first folded ring is sealed to the edge of the first diaphragm, and the outer edge of the first folded ring is sealed to the inner side of the support frame. The first folded ring is elastic.

[0017] Optionally, the support frame and the edge magnet are an integral structure.

[0018] Optionally, the power system further includes a magnetic cup covering the central magnetic portion and the edge magnetic portion on the side facing the second diaphragm. The magnetic cup has a hollow area, and the orthographic projection of the hollow area on the central magnetic portion covers the second annular gap and the orthographic projection of the second diaphragm on the central magnetic portion.

[0019] Optionally, the second vibration system further includes a second folded ring, which surrounds the second diaphragm. The inner edge of the second folded ring is sealed to the edge of the second diaphragm, and the outer edge of the second folded ring is sealed to the inner side of the magnetic cup. The second folded ring is elastic.

[0020] Optionally, the center lines of the edge magnetic portion, the first annular gap, and the second annular gap coincide.

[0021] Optionally, it also includes a first positive terminal, a first negative terminal, a second positive terminal, and a second negative terminal for receiving audio signals;

[0022] The first positive terminal and the first negative terminal are electrically connected to the first voice coil, and the second positive terminal and the second negative terminal are electrically connected to the second voice coil.

[0023] Optionally, it may also include a first capacitor, a first inductor, a second capacitor, and a second inductor;

[0024] The first positive electrode is electrically connected to the second positive electrode through a first inductor and a first capacitor connected in series;

[0025] The first negative terminal is electrically connected to the second negative terminal through a second inductor and a second capacitor connected in series. The first inductor and the second inductor are equal, and the first capacitor and the second capacitor are equal.

[0026] The first positive and first negative terminals are used to receive audio signals.

[0027] This utility model also provides an electronic device, including any of the speakers provided in the above technical solutions.

[0028] Optionally, it also includes a housing, the housing having a mounting cavity, and one side of the housing having a sound outlet communicating with the mounting cavity;

[0029] The loudspeaker is disposed within the mounting cavity, with the side of the edge magnet away from the central magnet opposite to the sound outlet.

[0030] A first acoustic cavity is formed between the side of the loudspeaker where the first diaphragm is located and the inner wall of the housing, and the first acoustic cavity is connected to the sound outlet.

[0031] A second acoustic cavity is formed between the side of the second diaphragm in the loudspeaker and the inner wall of the housing. The second acoustic cavity is connected to the sound outlet, while the first acoustic cavity is not connected to the second acoustic cavity.

[0032] Optionally, a closed third acoustic cavity is formed between the central magnet of the loudspeaker and the first diaphragm;

[0033] The speaker surrounds the outer wall of the central magnet and cooperates with the housing to form a closed fourth sound cavity, which is connected to the third sound cavity.

[0034] Optionally, the electronic device further includes a motherboard having an audio signal output terminal and a power amplifier. The audio signal output terminal is electrically connected to the input terminal of the power amplifier, and the output terminal of the power amplifier is electrically connected to the speaker for providing an audio signal to the speaker.

[0035] Optionally, when the speaker has a first inductor, a first capacitor, a second inductor, and a second capacitor, the positive terminal of the power amplifier output is electrically connected to the first positive terminal of the speaker, and the negative terminal of the power amplifier output is electrically connected to the first negative terminal of the speaker.

[0036] Optionally, when the first positive terminal, the first negative terminal, the second positive terminal, and the second negative terminal on the speaker are each individually connected to the motherboard, the motherboard further includes a third capacitor, a fourth capacitor, a third inductor, and a fourth inductor.

[0037] The positive terminal of the power amplifier output is electrically connected to the first positive terminal of the speaker;

[0038] The negative terminal of the power amplifier output is electrically connected to the first negative terminal;

[0039] The positive terminal of the power amplifier output is electrically connected to the second positive terminal through the third inductor and the third capacitor connected in series.

[0040] The negative terminal of the power amplifier output is electrically connected to the second negative terminal through the fourth inductor and the fourth capacitor connected in series.

[0041] The third inductor is equal to the fourth inductor, and the third capacitor is equal to the fourth capacitor.

[0042] This invention provides a loudspeaker and electronic device. In this loudspeaker, the power system and the first vibration system can cooperate to form a bass unit, realizing the function of a bass speaker. The central magnet and the second vibration system can cooperate to form a tweeter, realizing the function of a tweeter. The bass unit and the tweeter share the central magnet. That is, based on the bass speaker structure, only the structure of the second voice coil and the second diaphragm is added to realize the speaker structure that combines the tweeter and the bass speaker into one. The added parts are few, the structure is simple, the cost is extremely low, and compared with the traditional separate high and low frequency loudspeakers, it can greatly save installation space, especially suitable for electronic devices with high space requirements. Attached Figure Description

[0043] Figure 1 A schematic diagram of the structure of a loudspeaker provided in an embodiment of this utility model;

[0044] Figure 2 This is a structural schematic diagram of one side of the speaker provided in an embodiment of the present invention;

[0045] Figure 3 This is a schematic diagram of the structure of the other side of the speaker provided in an embodiment of the present invention;

[0046] Figure 4 A cross-sectional view of a loudspeaker provided for an embodiment of this utility model;

[0047] Figure 5 An assembly diagram of a loudspeaker provided for an embodiment of this utility model;

[0048] Figure 6 A schematic diagram of the structure of a loudspeaker provided in an embodiment of this utility model;

[0049] Figure 7 A schematic diagram of the connection between a speaker and a motherboard provided in an embodiment of this utility model;

[0050] Figure 8A circuit connection diagram of a loudspeaker provided for an embodiment of this utility model;

[0051] Figure 9 A test curve of a loudspeaker provided for an embodiment of this utility model.

[0052] icon:

[0053] 100 - Loudspeaker; E1 - Center magnet; E2 - Edge magnet; 1 - Center magnet; 2 - First center pole piece; 3 - Second center pole piece; 4 - Edge magnet; 5 - Annular pole piece; 6 - First voice coil; 7 - First diaphragm; 8 - Support frame; 9 - First surround; 10 - Second voice coil; 11 - Second diaphragm; 12 - Cylinder; 13 - Second surround; O - Annular groove; a1 - First annular gap; a2 - Second annular gap;

[0054] 101 - Audio signal output terminal; 102 - Power amplifier; 103 - Bass unit; 104 - Tweeter unit; P1 - First positive terminal; P2 - First negative terminal; P3 - Second positive terminal; P4 - Second negative terminal; L1 - First inductor; L2 - Second inductor; C1 - First capacitor; C3 - Second capacitor;

[0055] K - Housing; 210 - Rear cover; 230 - Sound outlet; A - First sound cavity; B - Second sound cavity; C - Fourth sound cavity;

[0056] 230 - Mainboard; 231 - First connection terminal; 232 - Second connection terminal; 233 - Third connection terminal; 234 - Fourth connection terminal; L3 - Third inductor; L4 - Fourth inductor; C3 - Third capacitor; C4 - Fourth capacitor. Detailed Implementation

[0057] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0058] Please refer to Figures 1 to 4 This utility model provides a loudspeaker, comprising:

[0059] The power system includes a central magnetic part E1 and an edge magnetic part E2. The edge magnetic part E2 is arranged around the central groove structure. There is a first annular gap a1 between the edge magnetic part E2 and the central magnetic part E1. The central magnetic part E1 has a first side and a second side that are opposite to each other. The second side has a second annular gap a2.

[0060] The first vibration system includes a first voice coil 6 and a first diaphragm 7. The first voice coil 6 is located in the first annular gap a1 and is arranged around the central magnetic part E1. The first diaphragm 7 is opposite to the first side of the central magnetic part E1, and the edge of the first diaphragm 7 is connected to the first voice coil 6.

[0061] The second vibration system includes a second voice coil 10 and a second diaphragm 11. The second voice coil 10 is located within the second annular gap a2 and is disposed around the inner sidewall of the second annular gap a2. The second diaphragm 11 is opposite to the second side of the central magnet E1, and the edge of the second diaphragm 11 is connected to the second voice coil 10.

[0062] In the speaker provided by this utility model embodiment, the power system and the first vibration system can cooperate to form a bass unit to realize the function of a bass speaker, and the central magnet E1 and the second vibration system can cooperate to form a tweeter to realize the function of a tweeter. The bass unit and the tweeter share the central magnet E1. That is, based on the bass speaker structure, only the structure of the second voice coil 10 and the second diaphragm 11 is added to realize the speaker structure that combines the tweeter and bass speaker into one. The added parts are few, the structure is simple, the cost is extremely low, and compared with the traditional high and low frequency separate speakers, it can greatly save installation space, especially suitable for electronic devices with high space requirements.

[0063] Specifically, in the above-mentioned loudspeaker, the central magnetic part E1 and the edge magnetic part E2 provide a magnetic field at the first annular gap a1. When the audio current passes through the first voice coil 6, the first voice coil 6 can be subjected to a force in the magnetic field, thereby generating vibration, which drives the first diaphragm 7 to vibrate and produce sound, thus realizing the sound production of the bass unit.

[0064] The central magnetic part E1 provides a magnetic field at the second annular gap a2. When the audio current passes through the second voice coil 10, the second voice coil 10 can be subjected to a force in the magnetic field, thereby generating vibration, which drives the second diaphragm 11 to vibrate and produce sound, thus realizing the sound production of the tweeter unit.

[0065] Specifically, the center lines of the edge magnetic part E2, the first annular gap a1, and the second annular gap a2 can coincide, which can ensure the stability of the vibration of the first diaphragm and the second diaphragm.

[0066] In this embodiment of the utility model, such as Figure 4 As shown, the central magnetic part E1 may include a central magnet 1, a first central pole piece 2, and a second central pole piece 3; the first central pole piece 2 is located on the side of the central magnet 1 facing the first diaphragm 7; the second central pole piece 3 is located on the side of the central magnet 1 facing the second diaphragm 11, and the orthographic projection of the second central pole piece 3 on the central magnet 1 is located in the region surrounded by the inner wall of the second annular gap a2.

[0067] In the above-mentioned loudspeaker, the central magnet 1 can generate a magnetic field, and the first central pole piece 2 can guide the magnetic field generated by the central magnet 1 to the first annular gap a1, forming a uniform magnetic field environment at the first annular gap a1. This uniform magnetic field ensures the linearity of the force on the first voice coil 6 during vibration, thereby improving the efficiency and sound quality of the loudspeaker.

[0068] Furthermore, the second center pole piece 3 can guide the magnetic field generated by the center magnet 1 to the second annular gap a2, forming a uniform magnetic field environment at the second annular gap a2. This uniform magnetic field ensures the linearity of the force on the second voice coil 10 during vibration, thereby improving the efficiency and sound quality of the speaker.

[0069] The first and second sides of the central magnetic part E1 can provide a magnetic field. Under the combined action of the first and second sides of the central magnetic part E1, the magnetic field strength at the first annular gap a1 and the second annular gap a2 will be enhanced, thereby improving the sensitivity and output power of the speaker.

[0070] Specifically, in the above-mentioned loudspeaker, the woofer and tweeter share a central magnet 1. Compared with the case where the woofer and tweeter are set separately, the use of one central magnet in the power system can be reduced. Only a second central pole piece 3 needs to be added to the power system of the woofer core. The cost is extremely low, which can greatly reduce the cost while realizing the functions of woofer and tweeter.

[0071] In this embodiment of the present invention, the edge magnet E2 may include an edge magnet 4 and an annular pole piece 5; the edge magnet 4 is arranged around the central magnet 1; the annular pole piece 5 is located on the side of the edge magnet 4 facing the first diaphragm 7.

[0072] In the aforementioned loudspeaker, the edge magnet 4 can supplement the magnetic field at the first annular gap a1, and the annular pole piece 5 can guide the magnetic field generated by the edge magnet 4 to the first annular gap a1, forming a uniform magnetic field environment at the first annular gap a1, which can enhance the magnetic field strength at the first annular gap a1, thereby improving the sensitivity and output power of the loudspeaker.

[0073] Specifically, the first central electrode 2 and the second central electrode 3 can be bonded to the central magnet 1 with glue; the annular electrode 5 can be bonded to the edge magnet 4 with glue.

[0074] The materials of the first central electrode 2, the second central electrode 3, and the annular electrode 5 can be low-carbon steel, electrical pure iron, or soft magnetic alloy, etc. There are no restrictions here, and it depends on the actual situation.

[0075] Specifically, the first central pole piece 2 and the second central pole piece 3 can also be designed as an integral part of the central magnet 1; the annular pole piece 5 can also be designed as an integral part of the edge magnet 4. There are no restrictions here, and it depends on the actual situation.

[0076] In this embodiment of the present invention, the power system further includes a support frame 8, which is located on the side of the edge magnet E2 near the first diaphragm 7 and is arranged around the second annular gap a2; the first vibration system further includes a first folded ring 9, which is arranged around the first diaphragm 7, with the inner edge of the first folded ring 9 sealed to the edge of the first diaphragm 7, and the outer edge of the first folded ring 9 sealed to the inner side of the support frame 8, and the first folded ring 9 is elastic.

[0077] In the aforementioned loudspeaker, the first diaphragm 7 is connected to the support frame 8 via the first surround 9. The elasticity of the first surround 9 ensures that the first voice coil 6 and the first diaphragm 7 can reciprocate, ensuring that the first diaphragm 7 maintains a stable trajectory during vibration.

[0078] Specifically, the support frame 8 needs to be made of high-strength materials to maintain structural stability and reduce deformation or loosening of components caused by vibration.

[0079] Specifically, the support frame 8 can be set around the annular pole piece 5 on the edge magnet 4 without affecting the magnetic circuit setting of the power system.

[0080] Specifically, the support frame 8 can be a canopy. The support frame 8 and the edge magnet 4 are separate structures, and the two can be fixed by screws or other structures.

[0081] Alternatively, the support frame 8 and the edge magnet 4 can be an integrated structure, which simplifies the structure, facilitates assembly, and saves costs.

[0082] In this embodiment of the present invention, the power system may further include a magnetic cup 12, which may cover the central magnetic part E1 and the edge magnetic part E2 on the side facing the second diaphragm 11. The magnetic cup 12 may have a hollow area, and the orthogonal projection of the hollow area on the central magnetic part E1 covers the second annular gap a2 and the orthogonal projection of the second diaphragm 11 on the central magnetic part E1.

[0083] In the aforementioned loudspeaker, the magnetic cup 12 is made of magnetically conductive material and together with the central magnetic part E1 and the edge magnetic part E2, forms a closed magnetic circuit, concentrating the magnetic field into the first annular gap, enhancing the magnetic field strength, and thus improving the loudspeaker's transduction efficiency.

[0084] Furthermore, the magnetic cup 12 can serve as a mounting base for the central magnetic part E1 and the edge magnetic part E2, ensuring that the power system remains stable during vibration and preventing noise or malfunctions caused by loosening.

[0085] In this embodiment of the present invention, the second vibration system may further include a second folded ring 13, which surrounds the second diaphragm. The inner edge of the second folded ring 13 is sealed to the edge of the second diaphragm 11, and the outer edge of the second folded ring 13 is sealed to the inner side of the magnetic cup 12. The second folded ring 13 is elastic.

[0086] In the above-mentioned loudspeaker, the second diaphragm 11 is connected to the magnetic cup 12 through the second surround 13. The elasticity of the second surround 13 can ensure that the second voice coil 10 and the second diaphragm 10 reciprocate, and can ensure that the second diaphragm 11 maintains a stable trajectory when vibrating.

[0087] In this embodiment of the invention, the first diaphragm 7 and the second diaphragm 11 are dome diaphragms. Dome diaphragms have functions such as enhancing diaphragm rigidity, optimizing high-frequency response, and improving sound field directivity.

[0088] In this embodiment of the utility model, such as Figure 5 As shown, the loudspeaker may further include a first positive electrode P1, a first negative electrode P2, a second positive electrode P3, and a second negative electrode P4 for receiving audio signals; wherein the first positive electrode P1 and the first negative electrode P2 are electrically connected to the first voice coil 6, and the second positive electrode P3 and the second negative electrode P4 are electrically connected to the second voice coil 10.

[0089] In the aforementioned loudspeaker, by applying a first audio signal to the first positive terminal P1 and the first negative terminal P2, an audio current can be formed on the first voice coil 6, and by applying a second audio signal to the second positive terminal P3 and the second negative terminal P4, an audio current can be formed on the second voice coil 10.

[0090] Specifically, the first positive electrode P1, the first negative electrode P2, the second positive electrode P3, and the second negative electrode P4 can be mounted on the support frame 8, exposed on the outside of the speaker, for easy connection to the mainboard 230 of the electronic device to receive audio signals. The audio signals are AC signals.

[0091] In this embodiment of the utility model, such as Figure 5 As shown, the loudspeaker may also include a first capacitor C1, a first inductor L1, a second capacitor C2, and a second inductor L2;

[0092] The first positive terminal P1 is electrically connected to the second positive terminal P3 through a first inductor L1 and a first capacitor C1 connected in series; the first negative terminal P2 is electrically connected to the second negative terminal P4 through a second inductor L2 and a second capacitor C2 connected in series, wherein the first inductor L1 and the second inductor L2 are equal, and the first capacitor C1 and the second capacitor C2 are equal; the first positive terminal P1 and the first negative terminal P2 are used to receive audio signals.

[0093] The aforementioned speaker integrates a first inductor L1, a first capacitor C1, a second inductor L2, and a second capacitor C2. The first voice coil 6 and the second voice coil 10 can be connected in parallel using capacitors. Capacitors have the characteristic of passing high frequencies and blocking low frequencies. The frequency of AC transmission can be determined by the combination of capacitors and inductors. It only needs to receive the audio signal transmitted by the motherboard 230 through the first positive terminal P1 and the first negative terminal P2 to realize the crossover design of the tweeter and woofer, achieving a wider frequency response range. The structure is simple and easy to assemble. While realizing the function of a full-range speaker, it can greatly reduce the cost of the high and low frequency crossover speaker design scheme.

[0094] In the above-mentioned speaker, the first inductor L1, the first capacitor C1, the second inductor L2, and the second capacitor C2 can be integrated inside the speaker by embedding inductors and capacitors. Only the first positive terminal P1 and the first negative terminal P2 are reserved on the outside of the speaker for connecting to the positive and negative terminals of the output terminal of the power amplifier 102 on the main board 230, respectively.

[0095] In the loudspeaker provided by this utility model, the center magnet 1, the first center pole piece 2, the edge magnet 4, the annular pole piece 5, the magnetic cup 12, the first voice coil 6, the first diaphragm 7, and the first surround 9 can form a bass unit; the center magnet 1, the second center pole piece 3, the first voice coil 6, the first diaphragm 7, and the second surround 13 can form a tweeter unit.

[0096] The tweeter and woofer share the same central magnet E1, making them one unit. Compared with traditional separate tweeter and woofer speakers, this design can save a lot of installation space, making it especially suitable for electronic devices with high space requirements.

[0097] The center lines of the first annular gap a1 and the second annular gap a2 are the same, and the tweeter and woofer are set at the same center position of the speaker. This makes the sound emitted by the speaker more focused, providing better sound positioning and consistency, so that the listener can better and more accurately feel the details and layers of the music.

[0098] Furthermore, the shared magnetic circuit design of the woofer and tweeter allows for a more concentrated magnetic field, enhancing the interaction between the first voice coil 6 and the second voice coil 10 within the magnetic field, thereby improving the speaker's sensitivity. A stronger magnetic field means the voice coil can generate greater driving force, increasing the speaker's output power and delivering a more powerful sound. Due to the increased sensitivity and output power, the speaker can more accurately reproduce audio signals, reducing distortion and thus improving sound quality.

[0099] Furthermore, the aforementioned speaker adds a second center pole piece 3, a second voice coil 10, a second diaphragm 11, and a second folded edge, all of which are located in the hollow area of ​​the magnetic cup 12. In the arrangement direction of the first diaphragm 7 and the second diaphragm 11, that is, in the thickness direction of the speaker, the added or removed components will not affect the thickness of the speaker.

[0100] Compared to traditional speaker designs, the speaker solution in this application, which uses a shared central magnet E1 for both the woofer and tweeter, can provide higher performance within the same volume, save space, and is suitable for miniaturized audio devices.

[0101] This utility model also provides an electronic device, including any of the speakers provided in the above technical solutions.

[0102] The electronic device provided in this embodiment includes a loudspeaker. The power system and the first vibration system of the loudspeaker can cooperate to form a bass unit, and the power system and the second vibration system can cooperate to form a tweeter unit. The bass unit and the tweeter unit share a central magnet E1. That is, based on the bass speaker structure, only the structure of the second voice coil 10 and the second diaphragm 11 is added to realize the speaker structure that combines the tweeter unit and the bass unit into one. The added parts are few, the structure is simple, the cost is extremely low, and compared with the traditional high and low frequency separate loudspeakers, it can greatly save the installation space of electronic devices.

[0103] In this embodiment of the utility model, such as Figure 6 As shown, the electronic device also includes a housing K, which has a mounting cavity, and a sound outlet 230 communicating with the mounting cavity on one side of the housing K;

[0104] The speaker 100 is disposed in the mounting cavity, with the side of the edge magnet E2 away from the center magnet E1 opposite to the sound outlet 230;

[0105] A first sound cavity A is formed between the side of the first diaphragm 7 in the loudspeaker 100 and the inner wall of the housing K, and the first sound cavity A is connected to the sound outlet 230.

[0106] A second sound cavity B is formed between the side of the second diaphragm 11 in the loudspeaker 100 and the inner wall of the housing K. The second sound cavity B is connected to the sound outlet 230, while the first sound cavity A is not connected to the second sound cavity B.

[0107] In the aforementioned electronic device, the two sides of the speaker 100 are respectively fitted with the housing K to form a first sound cavity A and a second sound cavity B. The first sound cavity A can be a bass front cavity, and the second sound cavity B can be a tweeter front cavity. The first sound cavity A and the second sound cavity B have independent performance and do not affect each other.

[0108] Furthermore, the first sound cavity A and the second sound cavity B are connected to the same sound outlet 230, which is opposite to the side of the speaker, thus saving internal space without taking up height of the electronic device.

[0109] Specifically, in electronic devices, the airflow direction within the mounting cavity can be... Figure 6 As shown by the middle arrow, the high and low frequencies emitted by the speaker converge from both sides of the speaker and are transmitted to the outside of the electronic device through the sound outlet 230.

[0110] Specifically, in the electronic device, the part of the speaker support frame 8 away from the sound outlet 230 and its adjacent two sides are sealed with the housing, so that the speaker and the housing can cooperate to form an independent first sound cavity A.

[0111] Specifically, in the electronic device, the part of the speaker's magnetic cup 12 away from the sound outlet 230 and its adjacent two sides are sealed and fitted with the housing K, so that the speaker and the housing K can cooperate to form an independent second sound cavity B.

[0112] Among them, the part of the magnetic bowl 12 near the sound hole 230 has a connecting channel, and the second sound cavity B can be connected to the sound hole 230 through the connecting channel.

[0113] In this embodiment of the present invention, a closed third acoustic cavity is formed between the central magnetic part E1 of the loudspeaker and the first diaphragm 7; the outer wall of the loudspeaker surrounding the central magnetic part E1 and the housing K cooperate to form a closed fourth acoustic cavity D, and the fourth acoustic cavity D is connected to the third acoustic cavity.

[0114] In the aforementioned electronic devices, the bass rear cavity requires a large chamber space. A fourth acoustic chamber D can be extended to the outside of the speaker. The third acoustic chamber and the fourth acoustic chamber D can work together to form the bass rear cavity, which can optimize the performance of the bass unit, enhance the low-frequency response, and make the music more powerful and impactful.

[0115] Specifically, the third sound cavity and the fourth sound cavity D can be connected through the connecting hole on the support frame 8.

[0116] The fourth acoustic chamber D can be positioned around the outer side of the speaker without affecting the height or thickness of the electronic device.

[0117] Specifically, the central magnet E1, support frame 8, first surround 9 and first diaphragm 7 in the loudspeaker can cooperate to form a closed third acoustic cavity; the magnetic cup 12, edge magnet 4 and outer wall of support frame 8 in the loudspeaker can cooperate with the housing to form a closed fourth acoustic cavity D.

[0118] Specifically, in electronic devices, since the tweeter unit requires a smaller tweeter rear cavity, the closed cavity formed by the speaker's central magnet E1, second diaphragm 11, second surround 13, and magnetic cup 12 can meet the requirements of the tweeter rear cavity. It is independent of the woofer rear cavity and does not communicate with it. There is no need to set up another tweeter rear cavity separately, which can significantly reduce the cost of electronic devices.

[0119] Specifically, the speaker can be fixed inside the electronic device by adhesive bonding. The speaker support frame 8 and the magnetic cup 12 can be glued to the housing of the electronic device to fix the speaker.

[0120] Specifically, in this embodiment, the electronic device can be:

[0121] (1) Portable audio devices: such as mobile phones, tablets, portable speakers, etc., require small, high-performance speakers.

[0122] (2) Car audio: Due to the limited interior space of a car, the size and performance requirements of the speakers are relatively high. In this embodiment, the speakers can improve the sound quality and output power of the car audio without increasing the size too much.

[0123] (3) Professional audio equipment: For professional audio fields such as recording studios and stage sound systems, the speakers in this embodiment can provide higher precision and reliability.

[0124] Alternatively, the electronic device can be other devices, without limitation, depending on the actual situation.

[0125] For example, when the electronic device is a mobile phone or tablet computer, the casing K can be composed of a battery back cover 210 and a component 220 on the non-display side of the screen, and the speaker 100 can be located between the back cover 210 and the screen. Specifically, the side where the first diaphragm 7 of the speaker 100 is located can cooperate with the battery back cover to form a second sound cavity B, the side where the second diaphragm 11 of the speaker is located can cooperate with the component 220 on the non-display side of the screen to form a first sound cavity A, and the outer wall of the speaker can cooperate with the component on the non-display side of the screen to form a fourth sound cavity D.

[0126] In this embodiment, the electronic device also includes a motherboard, which may have an audio signal output terminal and a power amplifier. The audio signal output terminal is electrically connected to the input terminal of the power amplifier, and the output terminal of the power amplifier is electrically connected to the speaker to provide an audio signal to the speaker.

[0127] In the aforementioned electronic device, the audio output terminal on the motherboard can output a weak audio signal, and the power amplifier 102 can amplify the weak audio signal to drive the speaker to produce sound.

[0128] The positive terminal of the power amplifier output can be electrically connected to the first positive terminal P1 and the second positive terminal P3 of the speaker, and the negative terminal of the power amplifier output can be electrically connected to the first negative terminal P2 and the second negative terminal P4 of the speaker, thus enabling the speaker to be driven.

[0129] Specifically, such as Figure 5 As shown, when the speaker integrates a first inductor L1, a first capacitor C1, a second inductor L2, and a second capacitor C2, the positive terminal V+ of the power amplifier output can be electrically connected to the first positive terminal P1 of the speaker, and the negative terminal V- of the power amplifier output can be electrically connected to the first negative terminal P2 of the speaker.

[0130] In the aforementioned electronic device, since the extension direction of the bass front cavity is perpendicular to the vibration mode of the first diaphragm 7, and the cavity space of the bass front cavity is relatively large, the high-frequency audio signal attenuates severely when acting on the first voice coil 6, resulting in poor sound quality. Therefore, the bass unit can be used as a low-frequency speaker. The first positive terminal P1 of the speaker is electrically connected to the second positive terminal P3 through the first capacitor C1 and the first inductor L1, and the first negative terminal P2 is electrically connected to the second negative terminal P4 through the second capacitor C2 and the second inductor L2. This allows the first voice coil 6 and the second voice coil 10 of the speaker to be connected in parallel with capacitors. Due to the characteristic of capacitors to pass high frequencies and block low frequencies, high-frequency audio signals can be transmitted to the second voice coil 10, thus the tweeter unit can be used as a high-frequency speaker 104.

[0131] Therefore, the speaker provided in this embodiment can realize the function of a full-range speaker, achieving a wider frequency response range. Furthermore, it has a simple structure, is easy to assemble, and can significantly reduce the cost of high-frequency and low-frequency crossover speakers while achieving the function of a full-range speaker.

[0132] In this embodiment, if the first inductor L1, the first capacitor C1, the second inductor L2, and the second capacitor C2 are not integrated into the speaker, then the first positive terminal P1, the first negative terminal P2, the second positive terminal P3, and the second negative terminal P4 on the speaker are each individually connected to the motherboard 230. Figure 7 As shown, in order to expand the frequency response range of the speaker, the motherboard 230 may also have a third capacitor C3, a fourth capacitor C4, a third inductor L3 and a fourth inductor L4.

[0133] Specifically, the positive terminal V+ of the power amplifier output is electrically connected to the first positive terminal P1 of the speaker; the positive terminal V+ of the power amplifier output is electrically connected to the second positive terminal P3 through a series connection of a third inductor L3 and a third capacitor C3; the negative terminal V- of the power amplifier output is electrically connected to the first negative terminal P2; the negative terminal V- of the power amplifier output is electrically connected to the second negative terminal P4 through a series connection of a fourth inductor L4 and a fourth capacitor C4; the third inductor L3 is equal to the fourth inductor L4, and the third capacitor C3 is equal to the fourth capacitor C4.

[0134] In the aforementioned electronic device, the bass unit of the speaker can serve as a low-frequency speaker 103. By setting a third inductor L3, a third capacitor C3, a fourth inductor L4, and a fourth capacitor C4 on the main board 230, the first voice coil 6 and the second voice coil 10 of the speaker are connected in parallel through capacitors. Due to the characteristic of capacitors that pass high frequencies and block low frequencies, high-frequency audio signals can be transmitted to the second voice coil 10. The tweeter unit can serve as a high-frequency speaker 104, supplementing the low-frequency speaker 103, so that the speaker can realize the function of a full-range speaker.

[0135] In the aforementioned electronic device, the design of mounting a third inductor L3, a third capacitor C3, a fourth inductor L4, and a fourth capacitor C4 on the motherboard 230 to realize the function of a full-range speaker is low in cost, simple in structure, easy to debug, and easy to manufacture.

[0136] Specifically, the motherboard 230 also includes a first connection terminal 231, a second connection terminal 232, a third connection terminal 233, and a fourth connection terminal 234.

[0137] Specifically, the positive terminal V+ of the power amplifier output is electrically connected to the first connection terminal 231, which is electrically connected to the first positive terminal P1 of the speaker. The negative terminal V- of the power amplifier output is electrically connected to the second connection terminal 232, which is electrically connected to the first negative terminal P2. The positive terminal V+ of the power amplifier output is electrically connected to the third connection terminal 233 through a series connection of the third inductor L3 and the third capacitor C3, which is electrically connected to the second positive terminal P3. The negative terminal V- of the power amplifier output is electrically connected to the fourth connection terminal 234 through a series connection of the fourth inductor L4 and the fourth capacitor C4, which is electrically connected to the second negative terminal P4, thus realizing the electrical connection between the main board 230 and the speaker.

[0138] Specifically, such as Figure 8 As shown Figure 5 and Figure 7 The equivalent circuit diagram of the circuit connection structure shows that the audio signal output terminal 101 outputs a weak audio signal, and the power amplifier 102 amplifies the audio signal and outputs it to the bass unit 103 and tweeter 104 of the speaker. The power amplifier 102 is connected to the tweeter 104 through the inductor L and the capacitor C. The capacitor C has the function of passing high frequencies and blocking low frequencies, realizing the function of a full-range speaker.

[0139] Specifically, the crossover point of the aforementioned high-frequency loudspeaker can be calculated using the following formula: Where f is the crossover point of the high-frequency loudspeaker, in Hz; L is the inductance value, in H; and C is the capacitance value, in F.

[0140] The crossover point f of the high-frequency loudspeaker is determined by adjusting the combination of inductor and capacitor. The capacitor has the characteristic of passing high frequencies and blocking low frequencies. The frequency of AC transmission (the crossover point of the high-frequency loudspeaker) is determined by the combination of inductor L and capacitor C.

[0141] like Figure 9 The diagram shows the SPL test curves of the tweeter and woofer in this embodiment; where L1 is the SPL test curve of the woofer and L2 is the SPL test curve of the tweeter; the intersection of L1 and L2 can be used as the crossover point of the high-frequency speaker 104. Figure 9 As can be seen, when the frequency of the audio signal is lower than the low-frequency F0, the bass unit performs well; when the frequency of the audio signal is higher than the low-frequency Fh, the signal attenuation on the bass unit is severe; and when the frequency of the audio signal is higher than the high-frequency F0, the tweeter performs well.

[0142] Specifically, the crossover point of the high-frequency speaker can be determined through the following steps.

[0143] Step 1: Due to the side-emitting nature of the bass unit, the structure of the rear bass chamber affects the bass F0 value, while the structure of the front bass chamber affects the bass Fh value. Once the structures of the rear and front bass chambers are determined, the influence of the front bass chamber on the bass Fh value can be confirmed through simulation and hands-on testing.

[0144] Step 2: Confirm the value of the tweeter's F0 frequency based on simulation and hands-on testing.

[0145] Step 3: Based on the high-frequency F0 value of the tweeter and the low-frequency Fh value of the woofer, the matching of capacitors and inductors can be confirmed, and the crossover point of the high-frequency speaker can be determined.

[0146] Specifically, in the aforementioned electronic device, since the speaker includes a woofer and a tweeter, the first voice coil 6 of the woofer and the second voice coil 10 of the tweeter are connected in parallel through a capacitor. The output terminal of the power amplifier 102 is electrically connected to the speaker, which is equivalent to one power amplifier 102 driving two speakers connected in parallel at the same time. This can reduce the resistance of the speaker, reduce the heat generation, increase the efficiency of converting electrical energy into mechanical energy, and reduce the efficiency of converting electrical energy into heat energy, thereby improving the efficiency of the speaker and obtaining higher volume and better sound quality.

[0147] Obviously, those skilled in the art can make various modifications and variations to the embodiments of this utility model without departing from the spirit and scope of this utility model. Therefore, if these modifications and variations of this utility model fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A loudspeaker, characterized in that, include: A power system includes a central magnetic part and an edge magnetic part, the edge magnetic part being disposed around the central magnetic part, a first annular gap being between the edge magnetic part and the central magnetic part, the central magnetic part having a first side and a second side facing away from each other, the second side having a second annular gap; A first vibration system includes a first voice coil and a first diaphragm. The first voice coil is located within the first annular gap and is disposed around the central magnetic portion. The first diaphragm is opposite to a first side of the central magnetic portion, and the edge of the first diaphragm is connected to the first voice coil. The second vibration system includes a second voice coil and a second diaphragm. The second voice coil is located within the second annular gap and is disposed around the inner sidewall of the second annular gap. The second diaphragm is opposite to the second side of the central magnet and the edge of the second diaphragm is connected to the second voice coil.

2. The loudspeaker according to claim 1, characterized in that, The central magnetic part includes a central magnet, a first central pole piece, and a second central pole piece; The first central pole piece is located on the side of the central magnet facing the first diaphragm; The second central pole piece is located on the side of the central magnet facing the second diaphragm, and the orthographic projection of the second central pole piece onto the central magnet is located in the area surrounded by the inner sidewall of the second annular gap.

3. The loudspeaker according to claim 1, characterized in that, The edge magnetic part includes an edge magnet and an annular pole piece; The edge magnets are arranged around the central magnetic part; The annular pole piece is located on the side of the edge magnet facing the first diaphragm.

4. The loudspeaker according to claim 1, characterized in that, The power system also includes a support frame located on the side of the edge magnet facing the first diaphragm and disposed around the second annular gap; The first vibration system further includes a first folded ring, which surrounds the first diaphragm. The inner edge of the first folded ring is sealed to the edge of the first diaphragm, and the outer edge of the first folded ring is sealed to the inner side of the support frame. The first folded ring is elastic.

5. The loudspeaker according to claim 4, characterized in that, The support frame and the edge magnet are an integral structure.

6. The loudspeaker according to claim 1, characterized in that, The power system also includes a magnetic cup that covers the central magnetic part and the edge magnetic part on the side facing the second diaphragm. The magnetic cup has a hollow area, and the orthographic projection of the hollow area on the central magnetic part covers the second annular gap and the orthographic projection of the second diaphragm on the central magnetic part.

7. The loudspeaker according to claim 6, characterized in that, The second vibration system further includes a second folded ring, which surrounds the second diaphragm. The inner edge of the second folded ring is sealed to the edge of the second diaphragm, and the outer edge of the second folded ring is sealed to the inner side of the magnetic cup. The second folded ring is elastic.

8. The loudspeaker according to claim 1, characterized in that, The center lines of the edge magnetic part, the first annular gap, and the second annular gap coincide.

9. The loudspeaker according to any one of claims 1-8, characterized in that, It also includes a first positive terminal, a first negative terminal, a second positive terminal, and a second negative terminal for receiving audio signals; The first positive terminal and the first negative terminal are electrically connected to the first voice coil, and the second positive terminal and the second negative terminal are electrically connected to the second voice coil.

10. The loudspeaker according to claim 9, characterized in that, It also includes a first capacitor, a first inductor, a second capacitor, and a second inductor; The first positive electrode is electrically connected to the second positive electrode through a first inductor and a first capacitor connected in series; The first negative terminal is electrically connected to the second negative terminal through a second inductor and a second capacitor connected in series. The first inductor and the second inductor are equal, and the first capacitor and the second capacitor are equal. The first positive and first negative terminals are used to receive audio signals.

11. An electronic device, characterized in that, Includes the loudspeaker as described in any one of claims 1-10.

12. The electronic device according to claim 11, characterized in that, It also includes a housing, which has a mounting cavity inside, and a sound outlet on one side of the housing that communicates with the mounting cavity; The loudspeaker is disposed within the mounting cavity, with the side of the edge magnet away from the central magnet opposite to the sound outlet. A first acoustic cavity is formed between the side of the loudspeaker where the first diaphragm is located and the inner wall of the housing, and the first acoustic cavity is connected to the sound outlet. A second acoustic cavity is formed between the side of the second diaphragm in the loudspeaker and the inner wall of the housing. The second acoustic cavity is connected to the sound outlet, while the first acoustic cavity is not connected to the second acoustic cavity.

13. The electronic device according to claim 12, characterized in that, A closed third acoustic cavity is formed between the central magnet of the loudspeaker and the first diaphragm; The speaker surrounds the outer wall of the central magnet and cooperates with the housing to form a closed fourth sound cavity, which is connected to the third sound cavity.

14. The electronic device according to any one of claims 11-13, characterized in that, The electronic device also includes a motherboard, which has an audio signal output terminal and a power amplifier. The audio signal output terminal is electrically connected to the input terminal of the power amplifier, and the output terminal of the power amplifier is electrically connected to the speaker to provide an audio signal to the speaker.

15. The electronic device according to claim 14, characterized in that, When the speaker has a first inductor, a first capacitor, a second inductor, and a second capacitor, the positive terminal of the power amplifier output is electrically connected to the first positive terminal of the speaker, and the negative terminal of the power amplifier output is electrically connected to the first negative terminal of the speaker.

16. The electronic device according to claim 14, characterized in that, When the first positive terminal, the first negative terminal, the second positive terminal, and the second negative terminal on the speaker are each individually connected to the motherboard, the motherboard also includes a third capacitor, a fourth capacitor, a third inductor, and a fourth inductor. The positive terminal of the power amplifier output is electrically connected to the first positive terminal of the speaker; The negative terminal of the power amplifier output is electrically connected to the first negative terminal; The positive terminal of the power amplifier output is electrically connected to the second positive terminal through the third inductor and the third capacitor connected in series. The negative terminal of the power amplifier output is electrically connected to the second negative terminal through the fourth inductor and the fourth capacitor connected in series. The third inductor is equal to the fourth inductor, and the third capacitor is equal to the fourth capacitor.

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