Sound-producing monomer and smart wearable device

Abstract

This invention discloses a sound-generating unit and a smart wearable device, relating to the field of sound energy conversion technology. The sound-generating unit includes a shell, a magnetic circuit system, and a vibration system. A receiving cavity is formed inside the shell. The magnetic circuit system is located within the receiving cavity and includes a central magnetic circuit and side magnetic circuits. The side magnetic circuits include two spaced-apart sub-magnets arranged along a first direction. The central magnetic circuit is located between the two side magnets. Each side magnet includes a connecting section and two bent sections connected to both ends of the connecting section. The openings of the two side magnets are opposite to each other. At least one pair of opposite bent sections of the two side magnets are spaced apart and form an airflow channel. The vibration system includes a voice coil and a diaphragm connected to the voice coil. The central magnetic circuit and the side magnetic circuits are spaced apart and form a gap. The voice coil is at least partially disposed in the gap. This invention can increase the effective opening area of ​​the rear cavity, reduce airflow velocity, and improve sound quality.

Description

Technical Field

[0001] This invention relates to the field of sound energy conversion technology, and in particular to a sound-generating unit and a smart wearable device. Background Technology

[0002] With the development of the portable consumer electronics market, miniature sound-generating devices have been widely used. Furthermore, with the increasing multifunctionality and miniaturization of portable electronic devices, users have higher and higher demands for sound quality. However, some speakers fall short in terms of sound quality. Summary of the Invention

[0003] The main objective of this invention is to propose a sound-generating unit and a smart wearable device, aiming to solve the technical problem of poor sound quality in some speakers in related technologies.

[0004] To achieve the above objectives, according to some embodiments of the present invention, a sound-generating unit is provided, comprising a housing, a magnetic circuit system, and a vibration system. The housing has an internal cavity. The magnetic circuit system is located within the cavity and includes a central magnetic circuit and side magnetic circuits. The side magnetic circuit includes two spaced-apart sub-magnets arranged along a first direction. The central magnetic circuit is located between the two sub-magnets. Each sub-magnet includes a connecting section and two bent sections connected to both ends of the connecting section. The two bent sections and the connecting section form a "C"-shaped structure. The openings of the two sub-magnets are opposite to each other. At least one pair of opposite bent sections of the two sub-magnets are spaced apart to form an airflow channel. The vibration system includes a voice coil and a diaphragm connected to the voice coil. The central magnetic circuit and the side magnetic circuit are spaced apart and form a gap. The voice coil is at least partially disposed within the gap.

[0005] In some embodiments, the two connecting segments are respectively disposed on both sides of the central magnetic circuit along the first direction, and the two bent segments of each of the side magnets are respectively disposed on both sides of the central magnetic circuit along the second direction, wherein the first direction is perpendicular to the second direction.

[0006] In some embodiments, the housing is provided with a connecting channel corresponding to the position of the airflow channel.

[0007] In some embodiments, the cross-sectional area of ​​the connecting channel is larger than the cross-sectional area of ​​the airflow channel in a section perpendicular to the airflow path.

[0008] In some embodiments, the magnetic circuit system includes a magnetic yoke, the magnetic yoke including a rectangular central portion, four sides of the central portion connected to sidewalls that bend and extend in the same direction, and a bent portion extending in the opposite direction from one end of the sidewall away from the central portion. The central magnetic circuit is fixed to the central portion and forms a first magnetic gap with the sidewalls, the side magnetic circuits are fixed to the bent portions and form a second magnetic gap with the sidewalls, and the sidewalls have openings communicating with the airflow channel.

[0009] In some embodiments, the central region of the central portion is provided with a through hole, and the central magnetic circuit includes two central sub-magnets, which are distributed on both sides of the through hole along the first direction.

[0010] In some embodiments, each of the edge sub-magnets is formed with a groove, the groove is formed with an opening, the two center sub-magnets are arranged in a one-to-one correspondence with the two edge sub-magnets, and the three sides of each edge sub-magnet surround the outer periphery of the corresponding center sub-magnet.

[0011] In some embodiments, the central magnetic circuit further includes two central magnetic guide plates, each disposed on a side of the two central sub-magnets away from the central portion; and / or,

[0012] The side magnetic circuit also includes two side magnetic plates, which are respectively located on the side of the two side sub-magnets away from the bending portion.

[0013] In some embodiments, the number of vibration systems is two, the two diaphragms are respectively disposed on both sides of the housing along the thickness direction, the two voice coils are connected to the two diaphragms in a one-to-one correspondence, wherein one voice coil is disposed corresponding to the first magnetic gap and the other voice coil is disposed corresponding to the second magnetic gap.

[0014] According to some embodiments of the present invention, the present invention provides a smart wearable device, the smart wearable device including the aforementioned sound-emitting unit.

[0015] In some embodiments, the smart wearable device is smart glasses. The smart glasses include a frame and temples respectively disposed on both sides of the frame. The temples are provided with a receiving space and a main sound-emitting hole and at least one secondary sound-emitting hole communicating with the receiving space. The sound-emitting unit is disposed in the receiving space. A main sound output channel is provided between the diaphragm and the main sound-emitting hole. The number of airflow channels is equal to the number of secondary sound-emitting holes and is provided in a one-to-one correspondence. A secondary sound output channel is provided between the airflow channels and the corresponding secondary sound-emitting holes.

[0016] In some embodiments, the number of airflow channels and the number of secondary sound-emitting holes are both two, with the two secondary sound-emitting holes respectively disposed on the upper and lower sides of the temple.

[0017] In the above solution, the sound-generating unit includes a housing, a magnetic circuit system, and a vibration system. The housing forms an internal cavity. The magnetic circuit system is located within the cavity and includes a central magnetic circuit and side magnetic circuits. Each side magnetic circuit includes two spaced-apart sub-magnets arranged along a first direction. The central magnetic circuit is located between the two sub-magnets. Each sub-magnet includes a connecting section and two bent sections connected to both ends of the connecting section. The two bent sections and the connecting section form a "C"-shaped structure. The openings of the two sub-magnets are opposite each other. At least one pair of opposite bent sections of the two sub-magnets are spaced apart to form an airflow channel. The vibration system includes a voice coil and a diaphragm connected to the voice coil. The central magnetic circuit and the side magnetic circuits are spaced apart and form a gap. The voice coil is at least partially disposed within the gap. This invention can increase the effective opening area of ​​the rear cavity, reduce airflow velocity, and improve sound quality. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the sound-generating unit according to an embodiment of the present invention;

[0020] Figure 2 This is an exploded structural diagram of the sound-generating monomer according to an embodiment of the present invention;

[0021] Figure 3 This is a partial structural diagram of the central magnetic circuit and the side magnetic circuit of the sound-generating unit in an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the side magnet of the sound-generating unit in an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the magnetic yoke of the sound-generating unit in an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the magnetic yoke, side magnetic circuit, and central magnetic circuit of the sound-generating unit according to an embodiment of the present invention;

[0025] Figure 7 for Figure 6 Another structural diagram from another perspective;

[0026] Figure 8 This is a schematic diagram of the structure of the magnetic yoke, voice coil, side magnetic circuit, and center magnetic circuit of the sound-generating unit in an embodiment of the present invention;

[0027] Figure 9 for Figure 8 Another structural diagram from another perspective;

[0028] Figure 10 A schematic diagram of the structure of the support piece of the sound-generating unit in an embodiment of the present invention;

[0029] Figure 11 A partial structural diagram of the temple of the smart glasses according to an embodiment of the present invention;

[0030] Figure 12 for Figure 11 Schematic diagram of the cross-sectional structure in the BB direction;

[0031] Figure 13 for Figure 11 A schematic diagram of the cross-sectional structure along the AA direction.

[0032] Explanation of icon numbers:

[0033] 10. Sound-generating unit; 1. Housing; 11. Connecting channel; 2. Magnetic circuit system; 21. Central magnetic circuit; 211. Central sub-magnet; 212. Central magnetic guide plate; 22. Side magnetic circuit; 221. Side sub-magnet; 2211. Connecting section; 2212. Bending section; 2213. Opening; 2214. Groove; 222. Side magnetic guide plate; 23. Magnetic yoke; 231. Central part; 2311. Through hole; 232. Side wall; 2321. Opening; 233. Bending part; 3. Vibration system; 31. Voice coil; 32. Diaphragm; 4. First magnetic gap; 5. Second magnetic gap; 6. Airflow channel; 7. Support plate; 71. Inner frame; 72. Outer frame; 73. Connector; 74. Solder pad;

[0034] 20. Temple; 201. Accommodation space; 202. Main sound port; 203. Secondary sound port; 204. Main sound outlet channel; 205. Secondary sound outlet channel.

[0035] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0037] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0038] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text implies three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where A and B are simultaneously satisfied. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0039] With the development of the portable consumer electronics market, miniature sound-generating devices have been widely used. Furthermore, with the increasing multifunctionality and miniaturization of portable electronic devices, users have higher and higher demands for sound quality. However, some speakers fall short in terms of sound quality.

[0040] After careful research, the applicant discovered that existing loudspeakers generally employ a conventional five-magnetic-circuit design, consisting of a central magnet and four peripheral magnets surrounding it. This design results in a smaller effective opening area in the rear cavity and a higher airflow velocity, affecting the sound quality and leading to subpar sound performance. It should be noted that the rear cavity described in this application refers to the internal cavity of the loudspeaker. Specifically, for example, when there are two diaphragms, it refers to the space formed between the two diaphragms, the magnetic circuit system, and the housing. When there is only one diaphragm, it can be considered the space formed by the side of the diaphragm facing the loudspeaker's housing, the magnetic circuit system, and the housing. Correspondingly, taking smart glasses as an example in smart wearable devices, the front cavity refers to the channel between the diaphragm and the main sound-emitting hole of the temple.

[0041] Please see Figures 1 to 4This invention proposes a sound-generating unit 10, comprising a housing 1, a magnetic circuit system 2, and a vibration system 3. The housing 1 has an internal cavity. The magnetic circuit system 2 is located within the cavity and includes a central magnetic circuit 21 and side magnetic circuits 22. Each side magnetic circuit 22 includes two spaced-apart sub-magnets 221 arranged along a first direction. The central magnetic circuit 21 is located between the two sub-magnets 221. Each sub-magnet 221 includes a connecting section 2211 and components respectively connected to the connecting section 2211. The two bent sections 2212 at both ends of 11, the two bent sections 2212 and the connecting section 2211 surround to form a "C" shaped structure, the openings 2213 of the two side magnets 221 are arranged opposite to each other, and the two side magnets 221 are arranged at least one pair of opposite bent sections 2212 spaced apart to form an airflow channel 6; the vibration system 3 includes a voice coil 31 and a diaphragm 32 connected to the voice coil 31, the central magnetic circuit 21 and the side magnetic circuit 22 are spaced apart and form a gap, and the voice coil 31 is at least partially disposed in the gap.

[0042] Taking a loudspeaker as an example, the housing 10 refers to the outer shell of the loudspeaker. The magnetic circuit system 2 refers to the components used to provide the magnetic circuit, generally consisting of a central magnetic circuit 21 and a side magnetic circuit 22, used to provide a magnetic field. The vibration system 3 refers to the components used to vibrate and generate sound. The vibration system 3 generally includes a voice coil 31 and a diaphragm 32 connected to the voice coil 31. The voice coil 31 can vibrate back and forth under the action of the magnetic field, and the vibration of the voice coil 31 drives the vibration of the diaphragm 32 to generate sound. The magnetic circuit system 2 of this application includes a central magnetic circuit 21 and a side magnetic circuit 22. Unlike related technologies, the side magnetic circuit 22 includes two side magnets 221 arranged at intervals. The two side magnets 221 are arranged along a first direction, and the central magnetic circuit 21 is located between the two side magnets 221, that is, the two side magnets 221 are located on both sides of the central magnetic circuit 21 along the first direction. It should be noted that the first direction in this application can be the length direction of the loudspeaker 10, such as... Figure 3 or Figure 4 As indicated by the middle arrow X, the second direction is the width direction of the sound-emitting unit 10, as shown below. Figure 3 or Figure 4 As indicated by arrow Y, the first direction is perpendicular to the second direction. Of course, the first direction could also be the width direction of the sound-emitting unit 10, such as... Figure 3 or Figure 4 As indicated by the middle arrow Y, the second direction is the length direction of the sound-producing unit 10, as shown below. Figure 3 or Figure 4 As indicated by arrow X, the first direction is perpendicular to the second direction.

[0043] Reference Figure 3 and Figure 4Each side magnet 221 includes a connecting segment 2211 and two bent segments 2212 respectively connected to both ends of the connecting segment 2211. The two bent segments 2212 are located on the same side of the connecting segment 2211. The two bent segments 2212 and the connecting segment 2211 form a "C" shaped structure. Specifically, the two bent segments 2212 and the connecting segment 2211 form a structure with an opening 2213. The C-shaped structure here can be a roughly C-shaped structure such as an arc, an elliptical arc, or a rectangular structure with an opening 2213. The openings 2213 of the two side magnets 221 are arranged opposite each other, meaning that the opening 2213 of one side magnet 221 faces the other side magnet 221. At least one pair of opposing bent segments 2212 of the two side magnets 221 are spaced apart to form an airflow channel 6. Since each side magnet 221 has two bent segments 2212, the opposite arrangement of the two side magnets results in two pairs of opposing bent segments 2212. Either one pair of bent segments 2212 can be spaced apart to form an airflow channel 6, or both pairs can be spaced apart to form opposing airflow channels 6. The airflow channel 6 communicates with the receiving cavity. When there are two airflow channels 6, they connect to opposite sides of the receiving cavity, allowing the receiving cavity to communicate with the outside world. Specifically, each bent segment 2212 extends along a first direction, and each connecting segment 2211 extends along a second direction.

[0044] Reference Figure 3 and Figure 4 In related technologies, four side magnets are generally arranged around the central magnetic circuit 21, including short-axis magnets arranged on both sides of the central magnetic circuit 21 along a first direction and long-axis magnets arranged on both sides of the central magnetic circuit 21 along a second direction. The central magnetic circuit 21 is generally rectangular, and the length of the central magnetic circuit 21 along the first direction is greater than the length along the second direction, that is, the length of the long-axis magnet is greater than the length of the short-axis magnet. This embodiment is equivalent to opening an airflow channel 6 at the position of the long-axis magnet, increasing the effective opening area of ​​the rear cavity, reducing the airflow velocity, and improving the sound quality. In addition, it should be noted that the bending section 2212 extends along the first direction to ensure that the two newly designed side magnets 221 can form an effective magnetic field and drive the voice coil 31 to vibrate.

[0045] Reference Figure 3 and Figure 4In some embodiments, two connecting segments 2211 are respectively disposed on both sides of the central magnetic circuit 21 along a first direction, and two bent segments 2212 of each lateral magnet 221 are respectively disposed on both sides of the central magnetic circuit 21 along a second direction, with the first direction perpendicular to the second direction. The two connecting segments 2211 are respectively disposed on both sides of the central magnetic circuit 21, and each connecting segment 2211 extends along the second direction. The two bent segments 2212 of each lateral magnet 221 are respectively disposed at both ends of the connecting segments 2211, and are disposed on both sides of the central magnetic circuit 21 along the second direction. Each bent segment 2212 extends along the first direction, which is perpendicular to the second direction. The connection between the connecting segment 2211 and the bent segment 2212 can be a right angle or a rounded angle. This arrangement facilitates the formation of a magnetic field between the lateral magnet 221 and the central magnetic circuit 21, driving the voice coil 31 located within the magnetic gap to vibrate.

[0046] Reference Figure 3 and Figure 4 In some embodiments, each lateral magnet 221 has a groove 2214 with an opening 2213. Two central magnets 211 are correspondingly arranged with two lateral magnets 221, and each lateral magnet 221 surrounds the corresponding central magnet 211 on three sides. The corresponding arrangement of each central magnet 211 and each lateral magnet 221 can form a magnetic field. Since there are two central magnets 211 and two lateral magnets 221, two magnetic fields are formed, which can drive the voice coil 31 to vibrate from two parts of the voice coil 31. Surrounding the corresponding central magnet 211 on three sides with the lateral magnet 221 on three sides is also to form a stronger magnetic field and increase the driving force for the voice coil 31 to vibrate.

[0047] Reference Figure 1 In some embodiments, the housing 1 is provided with a connecting channel 11 at the position corresponding to the airflow channel 6. The connecting channel 11 can be a notch on the housing 1. The sound pressure signal passes through the airflow channel 6 and the connecting channel 11 in sequence from the receiving cavity, and finally comes out from the temple 20. The main purpose of providing the connecting channel 11 is to allow the sound pressure signal to flow out from the airflow channel 6.

[0048] Reference Figure 1 In some embodiments, the cross-sectional area of ​​the connecting channel 11 is larger than that of the airflow channel 6 in a section perpendicular to the airflow path. The airflow path refers to the path from the receiving cavity, through the airflow channel 6 and the connecting channel 11, and finally out of the temple 20. The cross-sectional area of ​​the connecting channel 11 is set to be larger than that of the airflow channel 6 mainly to further reduce the airflow velocity and improve the sound quality.

[0049] Reference Figures 5 to 7In some embodiments, the magnetic circuit system 2 includes a magnetic yoke 23, which includes a rectangular central portion 231, four sides of the central portion 231 connected to sidewalls 232 that bend and extend in the same direction, and a bent portion 233 that bends and extends in the opposite direction from the end of the sidewall 232 away from the central portion 231. The central magnetic circuit 21 is fixed to the central portion 231 and forms a first magnetic gap 4 with the sidewall 232. The side magnetic circuit 22 is fixed to the bent portion 233 and forms a second magnetic gap 5 with the sidewall 232. The sidewall 232 is provided with an opening 2321 communicating with the airflow channel 6. Specifically, the sidewall 232 extends vertically upward from the edge of the central portion 231, and the bent portion 233 extends outward from the side of the sidewall 232 away from the central portion 231. The magnetic yoke 23 forms a recessed groove. The central magnetic circuit 21 is disposed on the central portion 231 and is spaced with the sidewall 232 to form a first magnetic gap 4. The side magnetic circuit 22 is spaced with the sidewall 232 to form a second magnetic gap 5. When there are two voice coils 31, one voice coil 31 extends into the first magnetic gap 4 and the other voice coil 31 extends into the second magnetic gap 5. At the same time, in order to avoid the sidewall 232 affecting the flow of air or sound pressure signal, an opening 2321 can be provided on the sidewall 232 at the position corresponding to the airflow channel 6, so that the receiving cavity is connected to the airflow channel 6 through the opening 2321. The magnetic yoke 23 not only increases the magnetic field strength and provides mounting support for the central magnetic circuit 21 and the side magnetic circuit 22, but also forms a first magnetic gap 4 and a second magnetic gap 5 with the central magnetic circuit 21 and the side magnetic circuit 22 respectively, which facilitates the simultaneous driving of the two voice coils 31 to vibrate. The through hole 2311 in the center allows the rear cavities of the two diaphragms 32 to be connected, and at the same time, it also reduces weight.

[0050] Reference Figure 6 In some embodiments, a through hole 2311 is provided in the central region of the central portion 231, and the central magnetic circuit 21 includes two central sub-magnets 211, which are distributed on both sides of the through hole 2311 along a first direction. The number of central sub-magnets 211 is two, and the two central sub-magnets 211 are spaced apart on both sides of the through hole 2311 along the first direction. Each central sub-magnet 211 corresponds to one side sub-magnet 221, forming a magnetic field with a magnetic field loop. The two spaced-apart central sub-magnets 211, together with the through hole 2311, allow the rear cavities of the two diaphragms 32 to connect, while also reducing weight.

[0051] Reference Figure 2In some embodiments, the central magnetic circuit 21 further includes two central magnetic guide plates 212, which are respectively disposed on the side of the two central sub-magnets 211 away from the central portion 231; in other embodiments, the side magnetic circuit 22 further includes two side magnetic guide plates 222, which are respectively disposed on the side of the two side sub-magnets 221 away from the bending portion 233. The magnetic guide plates (including the central magnetic guide plate 212 and the side magnetic guide plates 222) are usually made of ferromagnetic material, which can effectively guide and enhance the magnetic field generated by the magnetic circuit; and as part of the magnetic circuit, the magnetic guide plates can reduce magnetic field leakage, allowing more magnetic lines of force to pass through the voice coil 31, thereby improving energy utilization efficiency; furthermore, the magnetic guide plates can reduce distortion caused by improper magnetic circuit design by concentrating the magnetic field, thereby improving the sound quality performance of the speaker.

[0052] Reference Figure 8 and Figure 9 In some embodiments, the number of vibration systems 3 is two, with two diaphragms 32 respectively disposed on both sides of the housing 1 along the thickness direction. Two voice coils 31 are connected to the two diaphragms 32 in a one-to-one correspondence, with one voice coil 31 corresponding to the first magnetic gap 4 and the other voice coil 31 corresponding to the second magnetic gap 5. In this embodiment, the sound-generating unit 10 is a double-sided sound-generating unit 10 with two diaphragms 32. The two diaphragms 32 are disposed opposite each other on both sides of the housing 1 along the thickness direction of the housing 1. The thickness direction in this application is the vertical direction, or the up-down direction, or the height direction. Figure 1 As shown by the middle arrow Z. There are two voice coils 31, and the two voice coils 31 are connected to the two diaphragms 32 in a one-to-one correspondence. One of the voice coils 31 is set to the first magnetic gap 4, which can drive the two voice coils 31 to vibrate, so as to realize double-sided sound production.

[0053] Reference Figure 2 and Figure 10In some embodiments, the sound-generating unit 10 further includes a support piece 7, which includes an inner frame 71, an outer frame 72 disposed around the outer periphery of the inner frame 71, and a connector 73 connecting the inner frame 71 and the outer frame 72. The inner frame 71 is provided with a pad 74 for signal connection to the voice coil 31. The voice coil 31 is connected to an external circuit via the pad 74 to transmit electrical signals. It should be noted that, based on different designs of the magnetic circuit system 2, the structure of the support piece 7 in this application differs from that in related technologies. In this application, the inner frame 71 provides support for the voice coil 31, and the pad 74 on the inner frame 71 allows the voice coil 31 to connect to an external circuit via the pad 74. In conventional five-magnet designs in related technologies, there is one central magnet and four side magnets, with a gap between adjacent side magnets. The support piece 7 can be placed near the short-axis magnet and connected via the pad 74. The connection is made by routing traces between the gaps between adjacent side magnets, so that the voice coil 31 will not interfere with each other during vibration. In the technical solution of this application, a C-type magnet is used, which connects two adjacent side magnets, making it impossible to route traces. If traces were routed, the voice coil 31 would interfere with the C-type magnet during vibration. Therefore, a two-layer structure of inner frame 71 and outer frame 72 is designed. A pad 74 is provided on the inner frame 71, which is connected to the voice coil 31. The signal is then transmitted through traces on the outer frame 72 via connector 73, eliminating the need for spaced traces and reducing the risk of interference. Alternatively, the pad 74 can be positioned at the location corresponding to the airflow channel 6 for easier trace routing.

[0054] According to some embodiments of the present invention, the present invention provides a smart wearable device, which includes the aforementioned sound-emitting unit 10. The smart wearable device can be smart glasses, such as virtual reality glasses, augmented reality glasses, or mixed reality glasses; it can also be a watch, ring, bracelet, etc., or of course, a tablet, laptop, or iPad. Since the smart wearable device includes all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought by all the above technical solutions, which will not be elaborated further here.

[0055] Reference Figures 11 to 13 In some embodiments, the smart wearable device is smart glasses. The smart glasses include a frame and temples 20 respectively disposed on both sides of the frame. The temples 20 are provided with a receiving space 201 and a main sound-emitting hole 202 and at least one secondary sound-emitting hole 203 communicating with the receiving space 201. The sound-emitting unit 10 is disposed in the receiving space 201. A main sound output channel 204 is formed between the diaphragm 32 and the main sound-emitting hole 202. The number of airflow channels 6 is equal to the number of secondary sound-emitting holes 203 and is arranged in a one-to-one correspondence. A secondary sound output channel 205 is provided between the airflow channels 6 and the corresponding secondary sound-emitting holes 203.

[0056] Smart glasses can be virtual reality glasses, augmented reality glasses, or mixed reality glasses. The main sound-emitting port 202 and the secondary sound-emitting port 203 are both located on the outer shell of the temple 20. The outer shell forms a receiving space 201, which is connected to the airflow channel 6 via a connecting channel 11. This allows the airflow within the receiving cavity to pass through the airflow channel 6, the connecting channel 11, and the secondary sound-emitting channel 205, finally exiting from the secondary sound-emitting port 203.

[0057] Specifically, refer to Figure 11 and Figure 12 The main sound-emitting hole 202 is generally located near the frame. When the smart glasses are worn on the brain, the main sound-emitting hole 202 is positioned near the ear. A main sound-emitting channel 204 is also formed within the accommodating space 201 between the diaphragm 32 and the main sound-emitting hole 202. The sound emitted by the vibration of the diaphragm 32 is emitted from the main sound-emitting hole 202 through the main sound-emitting channel 204, allowing the human ear to receive the sound signal and achieve sound pickup. In a further embodiment, for a sound-emitting unit 10 with a double-sided diaphragm 32, the sound emitted by both diaphragms 32 is emitted from the main sound-emitting hole 202 through the main sound-emitting channel 204, with the sound path as follows: Figure 12 As shown in C1 and C2, an airflow channel 6 connects to a corresponding secondary sound outlet channel 205 and a corresponding secondary sound outlet 203, and the three can be designed in a one-to-one correspondence. Specifically, the secondary sound outlet 203 can be positioned on the side of the main sound outlet 202 away from the frame, thus reducing the impact of the sound signal emitted by the secondary sound outlet 203 on the user's normal sound pickup. For a person next to the wearer, since the sound waves radiated outward from the rear acoustic cavity are emitted from the secondary sound outlet 203, and the sound waves radiated outward from the front acoustic cavity are emitted from the main sound outlet 202, the two sound waves are out of phase and can cancel each other out, making it difficult for the person next to the wearer to receive the sound. This can protect the user's privacy and reduce the risk of information leakage.

[0058] In some embodiments, there are two airflow channels 6 and two auxiliary sound-emitting holes 203, with the two auxiliary sound-emitting holes 203 respectively disposed on the upper and lower sides of the temple. The two auxiliary sound-emitting holes 203 are respectively disposed on the upper and lower sides of the temple 20, and the number of airflow channels 6 is two, with each airflow channel 6 corresponding to one of the two auxiliary sound-emitting holes 203.

[0059] Reference Figure 13 The sound-emitting unit 10 is provided with two airflow channels 6, each airflow channel 6 corresponding to a secondary sound-emitting hole 203. Depending on the placement direction of the sound-emitting unit 10, the two secondary sound-emitting holes 203 can be respectively set on the upper and lower sides of the temple 20. The secondary sound-emitting holes 203 are spaced apart from the main sound-emitting hole 202. A secondary sound-emitting channel 205 connecting the airflow channels 6 and the secondary sound-emitting holes 203 is also formed in the accommodating space 201. The sound output path is as follows: Figure 12As shown in D1 and D2. By radiating sound waves with opposite phase to the main sound-emitting hole 202 from the upper and lower sides of the temple, the system can better prevent sound leakage and protect user privacy.

[0060] The above are merely exemplary embodiments of the present invention and do not limit the scope of the patent of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of patent protection of the present invention.

Claims

1. A sound-generating monomer, characterized in that, include: A housing, the interior of which forms a receiving cavity; A magnetic circuit system is located within the receiving cavity. The magnetic circuit system includes a central magnetic circuit and a side magnetic circuit. The side magnetic circuit includes two side magnets spaced apart and arranged along a first direction. The central magnetic circuit is located between the two side magnets. Each side magnet includes a connecting section and two bent sections respectively connected to both ends of the connecting section. The two bent sections and the connecting section form a "C"-shaped structure. The openings of the two side magnets are arranged opposite each other. At least one pair of opposite bent sections of the two side magnets are spaced apart and form an airflow channel. A vibration system comprising a voice coil and a diaphragm connected to the voice coil, wherein a central magnetic circuit and a side magnetic circuit are spaced apart and form a gap, and the voice coil is at least partially disposed in the gap.

2. The sound-generating unit as described in claim 1, characterized in that, The two connecting segments are respectively disposed on both sides of the central magnetic circuit along the first direction, and the two bent segments of each of the side magnets are respectively disposed on both sides of the central magnetic circuit along the second direction, wherein the first direction is perpendicular to the second direction.

3. The sound-generating unit as described in claim 2, characterized in that, The housing has a connecting channel at the position corresponding to the airflow channel.

4. The sound-generating unit as described in claim 3, characterized in that, In a cross-section perpendicular to the airflow path, the cross-sectional area of ​​the connecting channel is larger than the cross-sectional area of ​​the airflow channel.

5. The sound-generating unit as described in claim 1, characterized in that, The magnetic circuit system includes a magnetic yoke, which includes a rectangular central portion, four sides of the central portion connected to sidewalls that bend and extend in the same direction, and a bent portion extending in the opposite direction from one end of the sidewall away from the central portion. The central magnetic circuit is fixed to the central portion and forms a first magnetic gap with the sidewalls, and the side magnetic circuits are fixed to the bent portions and form a second magnetic gap with the sidewalls. The sidewalls have openings that communicate with the airflow channel.

6. The sound-generating unit as described in claim 5, characterized in that, The central region of the central part is provided with a through hole, and the central magnetic circuit includes two central sub-magnets, which are distributed on both sides of the through hole along the first direction.

7. The sound-generating unit as described in claim 6, characterized in that, Each of the said edge magnets has a groove, and the groove has an opening. The two said center magnets and the two said edge magnets are arranged in a one-to-one correspondence. Each of the said edge magnets surrounds the outer periphery of the corresponding center magnet on three sides.

8. The sound-generating unit as described in claim 7, characterized in that, The central magnetic circuit further includes two central magnetic guide plates, each disposed on the side of one of the two central sub-magnets away from the central portion; and / or The side magnetic circuit also includes two side magnetic plates, which are respectively located on the side of the two side sub-magnets away from the bending portion.

9. The sound-generating unit as described in claim 5, characterized in that, The vibration system consists of two diaphragms, which are respectively disposed on both sides of the housing along the thickness direction. The two voice coils are connected to the two diaphragms in a one-to-one correspondence, with one voice coil corresponding to the first magnetic gap and the other voice coil corresponding to the second magnetic gap.

10. A smart wearable device, characterized in that, The smart wearable device includes the sound-generating unit as described in any one of claims 1 to 9.

11. The smart wearable device as described in claim 10, characterized in that, The smart wearable device is a smart glasses. The smart glasses include a frame and temples respectively disposed on both sides of the frame. The temples are provided with a receiving space and a main sound-emitting hole and at least one secondary sound-emitting hole communicating with the receiving space. The sound-emitting unit is disposed in the receiving space. A main sound output channel is provided between the diaphragm and the main sound-emitting hole. The number of airflow channels is equal to the number of secondary sound-emitting holes and is provided in a one-to-one correspondence. A secondary sound output channel is provided between the airflow channels and the corresponding secondary sound-emitting holes.

12. The smart wearable device as described in claim 11, characterized in that, The number of airflow channels and the number of auxiliary sound-emitting holes are both two, with the two auxiliary sound-emitting holes respectively located on the upper and lower sides of the temple.

Images