Voice generator and smart wearable devices

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 housing, a magnetic circuit system, and a vibration system. The housing is fixedly connected to the magnetic circuit system. The vibration system includes a voice coil and a diaphragm connected to the voice coil. The outer periphery of the diaphragm is fixed to the housing. The vibration system, magnetic circuit system, and housing together form a rear cavity. The magnetic circuit system includes a central magnetic circuit and a side magnetic circuit disposed around the periphery of the central magnetic circuit. 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. The side magnetic circuit includes a side magnet and a side magnetic guide plate disposed on the side magnet. The edge of the side magnetic guide plate has an outward-facing notch. The housing has a groove facing the notch, and the groove communicates with the notch to form an air channel. The air channel connects the rear cavity to the external space. This sound-generating unit can effectively 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, the present invention provides a sound-generating unit, including a housing, a magnetic circuit system, and a vibration system. The housing is fixedly connected to the magnetic circuit system. The vibration system includes a voice coil and a diaphragm connected to the voice coil. The outer periphery of the diaphragm is fixed to the housing. The vibration system, the magnetic circuit system, and the housing enclose a rear cavity. The magnetic circuit system includes a central magnetic circuit and a side magnetic circuit disposed on the outer periphery of the central magnetic circuit. The central magnetic circuit and the side magnetic circuit are spaced apart and form a gap. The voice coil is at least partially disposed in the gap. The side magnetic circuit includes a side magnet and a side magnetic guide plate disposed on the side magnet. The edge of the side magnetic guide plate is provided with an outward-facing notch.

[0005] The housing has a groove facing the notch, and the groove communicates with the notch to form an air channel, which connects the rear cavity with the external space.

[0006] In some embodiments, the magnetic circuit system further includes a magnetic yoke, the magnetic yoke including a rectangular central portion, a bent portion disposed around the central portion, and a sidewall extending in the same direction from the central portion, the bent portion and the central portion being disposed on both sides of the sidewall, the central magnetic circuit being fixed to the central portion and spaced apart from the sidewall to form a first magnetic gap, and the side magnetic circuit being fixed to the bent portion and spaced apart from the sidewall to form a second magnetic gap.

[0007] In some embodiments, there are two sidewalls, which are disposed on opposite sides of the central portion, and the side of each sidewall away from the central portion is connected to the corresponding bend; or, there are four sidewalls and four bends, and each bend is formed by bending and extending the corresponding sidewall away from the central portion in the opposite direction.

[0008] In some embodiments, the number of vibration systems is two, with two diaphragms respectively disposed on both sides of the housing along the thickness direction, and two voice coils connected to the two diaphragms in a one-to-one correspondence, wherein one voice coil is disposed corresponding to a first magnetic gap and the other voice coil is disposed corresponding to a second magnetic gap; the side magnetic guide plate includes an upper magnetic guide plate and a lower magnetic guide plate, the upper magnetic guide plate and the lower magnetic guide plate are sandwiched on both sides of the side magnet along the thickness direction, the lower magnetic guide plate is the bent portion of the magnetic yoke, and the upper magnetic guide plate and / or the lower magnetic guide plate are provided with the notch.

[0009] In some embodiments, the housing includes an upper housing and a lower housing, which are sandwiched on both sides of the magnetic circuit system along the thickness direction. The upper magnetic plate and the lower magnetic plate are provided with the notch, and the upper housing and the lower housing are provided with the groove corresponding to the position of the notch.

[0010] In some embodiments, the notch in the upper magnetic plate and the notch in the lower magnetic plate are correspondingly arranged in the thickness direction.

[0011] In some embodiments, the bending portion includes two first sides arranged in parallel along a first direction and two second sides arranged in parallel along a second direction, wherein the first direction and the second direction are perpendicular.

[0012] At least one of the first edges is provided with at least one of the notches; and / or,

[0013] At least one of the second sides is provided with at least one of the notches.

[0014] In some embodiments, the edge magnet is recessed in a direction away from the notch to form a flow groove communicating with the notch.

[0015] In some embodiments, an airflow channel is formed between the end of each of the side magnets and the inner wall surface of the housing, and a guide surface is provided on the side of at least one of the side magnets facing the airflow channel, so that the cross-sectional area of ​​the corresponding airflow channel increases from the inside of the sound-generating unit to the outside.

[0016] In some embodiments, at least one of the side magnets has an inner side facing the central magnetic circuit, an outer side opposite to the inner side, and two side sides connecting the inner side and the outer side respectively. The length of the inner side is greater than the length of the outer side. At least one of the side sides forms the drainage surface. The length of the side magnet having the drainage surface decreases in the direction from the inner side to the outer side.

[0017] In some embodiments, each of the side surfaces includes a straight surface and an inclined surface connected to each other, the side of the straight surface away from the inclined surface is connected to the inner side surface, and the side of the inclined surface away from the straight surface is connected to the outer side surface, wherein the inclined surface is the drainage surface; or,

[0018] Each of the aforementioned side surfaces includes a straight surface and a curved surface that are connected to each other. The side of the straight surface away from the curved surface is connected to the inner side surface, and the side of the curved surface away from the straight surface is connected to the outer side surface. The curved surface is the drainage surface.

[0019] 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.

[0020] 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 air 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 air channels and the corresponding secondary sound-emitting holes.

[0021] In some embodiments, the number of air 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.

[0022] In the above solution, the sound-generating unit includes a housing, a magnetic circuit system, and a vibration system. The housing is fixedly connected to the magnetic circuit system. The vibration system includes a voice coil and a diaphragm connected to the voice coil. The outer periphery of the diaphragm is fixed to the housing. The vibration system, the magnetic circuit system, and the housing together form a rear cavity. The magnetic circuit system includes a central magnetic circuit and a side magnetic circuit disposed around the outer periphery of the central magnetic circuit. 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. The side magnetic circuit includes a side magnet and a side magnetic guide plate disposed on the side magnet. The edge of the side magnetic guide plate has an outward-facing notch. The housing has a groove facing the notch. The groove and the notch communicate to form an air channel, which connects the rear cavity to the external space. This invention can effectively increase the effective opening area of ​​the rear cavity, reduce the airflow velocity, and improve the sound quality. Attached Figure Description

[0023] 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.

[0024] Figure 1 This is a schematic diagram of the structure of the sound-generating unit according to an embodiment of the present invention;

[0025] Figure 2 This is an exploded structural diagram of the sound-generating monomer according to an embodiment of the present invention;

[0026] Figure 3 This is a partial structural schematic diagram of the sound-generating unit according to an embodiment of the present invention;

[0027] Figure 4 This is a partial structural schematic diagram of the magnetic circuit system of the sound-generating unit according to an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the magnetic yoke of the sound-generating unit in an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the voice coil and magnetic circuit system of the sound-generating unit in an embodiment of the present invention;

[0030] Figure 7 for Figure 6 Another structural diagram from a different perspective;

[0031] Figure 8 This is a schematic diagram of the central magnetic circuit and the side magnetic circuit of the sound-generating unit in an embodiment of the present invention;

[0032] Figure 9 This is a schematic diagram of the lower magnetic plate of the sound-generating unit according to an embodiment of the present invention;

[0033] Figure 10 This is a schematic diagram of the housing of the sound-generating unit according to an embodiment of the present invention;

[0034] Figure 11 This is a schematic diagram of the side magnet of the sound-generating unit in an embodiment of the present invention;

[0035] Figure 12 This is a cross-sectional structural diagram of the sound-generating unit according to an embodiment of the present invention;

[0036] Figure 13 This is a schematic diagram of the structure of the central magnet and the side magnet of the sound-generating unit in an embodiment of the present invention;

[0037] Figure 14 This is a schematic diagram of the side magnet of the sound-generating unit in an embodiment of the present invention;

[0038] Figure 15 This is a schematic diagram of the side magnet of the sound-generating unit according to an embodiment of the present invention;

[0039] Figure 16 This is another structural schematic diagram of the edge magnet of the sound-generating unit in an embodiment of the present invention;

[0040] Figure 17 This is another structural schematic diagram of the edge magnet of the sound-generating unit in an embodiment of the present invention;

[0041] Figure 18 A partial structural diagram of the temple of the smart glasses according to an embodiment of the present invention;

[0042] Figure 19 for Figure 18 Schematic diagram of the cross-sectional structure in the BB direction;

[0043] Figure 20 for Figure 18 A schematic diagram of the cross-sectional structure along the AA direction.

[0044] Explanation of icon numbers:

[0045] 10. Sound-generating unit; 1. Housing; 11. Rear cavity; 12. Groove; 13. Upper housing; 14. Lower housing; 2. Magnetic circuit system; 21. Central magnetic circuit; 211. Central magnet; 212. Central magnetic guide plate; 22. Side magnetic circuit; 221. Side magnet; 2211. Inner surface; 2212. Outer surface; 2213. Side surface; 22131. Drainage surface; 22132. Straight surface; 22133. Slanted surface Surface; 22134, Curved surface; 2214, Flow groove; 220, Side magnetic plate; 222, Upper magnetic plate; 2221, Notch; 223, Lower magnetic plate; 23, Magnetic yoke; 231, Center part; 232, Side wall; 233, Bending part; 234, Connector; 3, Vibration system; 31, Voice coil; 32, Diaphragm; 4, First magnetic gap; 5, Second magnetic gap; 6, Airflow channel; 7, Air channel;

[0046] 20. Temple; 201. Accommodation space; 202. Main sound port; 203. Secondary sound port; 204. Main sound outlet channel; 205. Secondary sound outlet channel.

[0047] 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

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] After careful research, the applicant discovered that existing loudspeakers generally use a conventional five-magnetic-circuit design, which consists of a central magnet and four side magnets surrounding the central magnet. This design results in a smaller effective opening area in the rear cavity and a higher airflow velocity in the rear cavity, affecting the sound quality and causing the loudspeaker to have a poor sound quality.

[0053] Please see Figures 1 to 4According to some embodiments of the present invention, the present invention provides a sound-generating unit 10, including a housing 1, a magnetic circuit system 2, and a vibration system 3. The housing 1 is fixedly connected to the magnetic circuit system 2. The vibration system 3 includes a voice coil 31 and a diaphragm 32 connected to the voice coil 31. The outer periphery of the diaphragm 32 is fixed to the housing 1. The vibration system 3, the magnetic circuit system 2, and the housing 1 enclose a rear cavity 11. The magnetic circuit system 2 includes a central magnetic circuit 21 and a side magnetic circuit 22 disposed on the outer periphery of the central magnetic circuit 21. The central magnetic circuit 21 and the side magnetic circuit 22 are spaced apart and form a gap. The voice coil 31 is at least partially disposed in the gap. The side magnetic circuit 22 includes a side magnet 221 and a side magnetic guide plate 220 disposed on the side magnet 221. The edge of the side magnetic guide plate 220 is provided with an outward-facing notch 2221. The housing 1 is provided with a groove 12 facing the notch 2221. The groove 12 communicates with the notch 2221 to form an air channel 7. The air channel 7 communicates with the rear cavity 11 and the external space.

[0054] Taking a loudspeaker as an example, the sound-generating unit 10 is described as follows: The housing 1 refers to the outer shell of the loudspeaker; the magnetic circuit system 2 refers to the components that 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 central magnetic circuit 21 may include a central magnet 211 and a central magnetic guide plate 212 disposed on the central magnet 211; the vibration system 3 refers to the components that vibrate to 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 is disposed in the gap between the central magnetic circuit 21 and the side magnetic circuit 22, and can vibrate reciprocally under the action of the magnetic field. Sound is generated by the vibration of the voice coil 31 driving the diaphragm 32 to vibrate. The side magnetic circuit 22 includes side magnets 221 and side magnetic guide plates 220. There can be multiple side magnets 221, which surround the outer periphery of the central magnetic circuit 21. The side magnetic guide plates 220 are used to concentrate magnets, which can increase the magnetic field strength and improve the distribution of magnetic field lines. A notch 2221 with an outward opening is provided at the edge of the magnetic guide plate 220. A groove 12 is provided on the housing 1 at the position corresponding to the notch 2221. The groove 12 and the notch 2221 are connected to form an air channel 7. The air channel 7 connects the rear cavity 11 and the external space. Here, the external space refers to the space outside the generating unit. In this way, the airflow in the rear cavity 11 can flow from the air channel 7 to the external space. The outflow path of the gas from the air channel 7 is as follows: Figure 4 As shown by the middle arrow. In this embodiment, a notch 2221 is provided on the side magnetic plate 220, and a groove 12 is provided on the housing 1 at the position corresponding to the notch 2221. The notch 2221 and the groove 12 are connected to form an air channel 7, which adds an air channel 7 between the rear cavity 11 and the external space. This allows the airflow in the rear cavity 11 to flow to the external space through the air channel 7, which can effectively increase the effective opening area of ​​the rear cavity 11, reduce the airflow velocity, and improve the sound quality.

[0055] Please see Figures 5 to 7In some embodiments, the magnetic circuit system 2 further includes a magnetic yoke 23. The magnetic yoke 23 includes a rectangular central portion 231, bent portions 233 disposed around the central portion 231, and sidewalls 232 extending from the central portion 231 in the same direction. The bent portions 233 and the central portion 231 are respectively disposed on both sides of the sidewalls 232. The central magnetic circuit 21 is fixed to the central portion 231 and forms a first magnetic gap 4 with the sidewalls 232. The side magnetic circuits 22 are fixed to the bent portions 233 and form a second magnetic gap 5 with the sidewalls 232. Specifically, the sidewalls 232 are formed by extending vertically upward from the side of the central portion 231. The bent portions 233 and the central portion 231 are disposed on both sides of the sidewalls 232. The bent portions 233 may or may not be connected to the sidewalls 232. In some specific embodiments, there are four sidewalls 232 and four bends 233, each bend 233 being formed by bending and extending the corresponding sidewall 232 away from the center portion 231 in the opposite direction. (Refer to...) Figure 5 In other specific embodiments, there are two sidewalls 232, which are disposed on opposite sides of the central portion 231. The side of each sidewall 232 away from the central portion 231 is connected to a corresponding bent portion 233, and each bent portion 233 is formed by bending and extending the corresponding sidewall 232 away from the central portion 231. Of course, this application does not limit the specific number of sidewalls 232, and the number of sidewalls 232 and bent portions 233 that can achieve the purpose of this invention are all within the scope of protection of this application. The central magnetic circuit 21 is fixed to the central portion 231 and forms a first magnetic gap 4 with the sidewalls 232 at a distance, and the side magnetic circuit 22 is fixed to the bent portion 233 and forms a second magnetic gap 5 with the sidewalls 232 at a distance, and one voice coil 31 is disposed corresponding to the first magnetic gap 4 and the other is disposed corresponding to the second magnetic gap 5. 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.

[0056] Please see Figures 6 to 8 In some embodiments, the vibration system 3 has two components. Two diaphragms 32 are 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. One voice coil 31 is disposed corresponding to the first magnetic gap 4, and the other voice coil 31 is disposed corresponding to the second magnetic gap 5. The side magnetic guide plate 220 includes an upper magnetic guide plate 222 and a lower magnetic guide plate 223. The upper magnetic guide plate 222 and the lower magnetic guide plate 223 are sandwiched on both sides of the side magnet 221 along the thickness direction. The lower magnetic guide plate 223 is the bent portion 233 of the yoke 23. A notch 2221 is provided on the upper magnetic guide plate 222 and / or the lower magnetic guide plate 223. The upper magnetic guide plate 222 and the lower magnetic guide plate 223 are disposed on both sides of the side magnet 221 along the thickness direction. The thickness direction described in this application is the vertical direction. Figure 1 As indicated by the middle arrow Z. A notch 2221 can be provided on the upper magnetic plate 222, or on the lower magnetic plate 223, or on both the upper and lower magnetic plates 222 and 223. The bent portion 233 of the magnetic yoke 23 serves as the lower magnetic plate 223 and is positioned on the side magnet 221. Specifically, the number of bent portions 233 and side magnets 221 can both be set to four, with a one-to-one correspondence between them. The bent portions 233 can be connected together via connectors 234.

[0057] Please see Figure 3 , Figures 8 to 10 In some embodiments, the housing 1 includes an upper housing 13 and a lower housing 14, which are sandwiched on both sides of the magnetic circuit system 2 along the thickness direction. The upper magnetic plate 222 and the lower magnetic plate 223 are both provided with notches 2221, and the upper housing 13 and the lower housing 14 are provided with grooves 12 at the positions corresponding to the notches 2221.

[0058] The upper housing 13 and lower housing 14 are detachably connected and respectively clamped on opposite sides of the magnetic circuit system 2, serving to fix the magnetic circuit system 2. Both the upper magnetic plate 222 and the lower magnetic plate 223 have notches 2221. The upper housing 13 has a groove 12 facing the notch 2221 of the upper magnetic plate 222, and the lower housing 14 has a groove 12 facing the notch 2221 of the lower magnetic plate 223. Thus, the notch 2221 on the upper magnetic plate 222 and the groove 12 on the upper housing 13 and lower magnetic plate 223, respectively, form an air channel 7. This allows air channels 7 to be formed from the upper and lower sides of the side magnet 221, enabling the rear cavity 11 to communicate with the external space, further increasing the opening area, which helps to further reduce airflow velocity and improve sound quality. Please refer to [link / reference]. Figure 8 In some embodiments, the notches 2221 of the upper magnetic plate 222 and the lower magnetic plate 223 are correspondingly arranged in the thickness direction. The notches 2221 of the upper magnetic plate 222 and the lower magnetic plate 223 also allow the fluid to pass through the correspondingly arranged notches in the thickness direction of the sound-generating unit 10, thereby improving the uniformity of gas outflow.

[0059] In some embodiments, the bent portion 233 includes two first sides arranged parallel to each other along a first direction and two second sides arranged parallel to each other along a second direction, the first direction and the second direction being perpendicular; at least one first side is provided with at least one notch 2221; and / or, at least one second side is provided with at least one notch 2221. In this application, the first direction can be the length direction of the sound-emitting unit 10, and the second direction can be the width direction of the sound-emitting unit 10. Of course, the first direction can also be the width direction of the sound-emitting unit 10, in which case the second direction is the length direction of the sound-emitting unit 10, and the first direction is perpendicular to the second direction. For example, when the first direction is the length direction of the sound-emitting unit 10, the side magnet 221 corresponding to the first side is a short-axis magnet, and the side magnet 221 corresponding to the second side is a long-axis magnet. Notches 2221 can be provided on at least one first side, and the number of notches 2221 is not limited to one. Similarly, notches 2221 can also be provided on the second side, and the number of notches 2221 is not limited to one. The specific number can be set by those skilled in the art according to actual needs.

[0060] Please see Figure 11 In some embodiments, the edge magnet 221 is recessed at the position corresponding to the notch 2221, forming a flow groove 2214 communicating with the notch 2221. To further increase the opening area, reduce the airflow velocity, and improve sound quality, the flow groove 2214 can also be provided at the position corresponding to the notch 2221 on the edge magnet 221. The flow groove 2214 is a recessed groove on the edge magnet 221. When the flow groove 2214 is not provided, the airflow path is rear cavity 11 – notch 2221 – groove 12 – external space. After the flow groove 2214 is provided, the flow groove 2214 is connected to the notch 2221, which is equivalent to increasing the cross-sectional area at the original notch 2221. Here, the cross-sectional area refers to the cross-sectional area perpendicular to the airflow path, which is equivalent to increasing the opening area.

[0061] Please see Figure 3 , Figure 12 and Figure 15 In some embodiments, an airflow channel 6 is formed between the end of each side magnet 221 and the inner wall surface of the housing 1. At least one side magnet 221 is provided with a guide surface 22131 facing the airflow channel 6, so that the cross-sectional area of ​​the corresponding airflow channel 6 increases from the inside of the sound-emitting unit 10 to the outside.

[0062] In this application, the end of the side magnet 221 refers to the end along the length of each side magnet 221 and on the side away from the central magnet 211. Generally, there are two ends. Typically, there are four side magnets 221. At least one side magnet 221 can refer to any one of the side magnets 221, any two side magnets 221, or any three side magnets 221. Alternatively, all four side magnets 221 can be provided with a drainage surface 22131. Of course, those skilled in the art will understand that the number of side magnets 221 may differ for different types of loudspeakers, and this application does not specifically limit the number of side magnets 221. Generally, due to the vibration of the diaphragm 32, the sound signal emitted from the speaker housing cavity flows out of the speaker through the airflow channel 6. The housing 1 also has a connecting channel to facilitate airflow. This application provides a guiding surface 22131 on at least one side magnet 221 facing the airflow channel 6. Specifically, the guiding surface 22131 can be provided at one or both ends of the side magnet 221, so that the cross-sectional area of ​​the airflow channel 6 from the inside to the outside of the self-emitting unit 10 tends to increase. This effectively increases the effective opening area of ​​the rear cavity, reduces the airflow velocity, and improves the sound quality. It should be noted that this increasing trend includes not only a gradual increase in cross-sectional area, but also various other scenarios such as the cross-sectional area first remaining constant and then increasing, or increasing and then remaining constant, or increasing and then remaining constant again, or increasing and then increasing again. Those skilled in the art will understand that any embodiment in which the cross-sectional area of ​​the self-emitting unit 10 tends to increase from the inside to the outside is within the scope of protection of this application.

[0063] See Figure 14 and Figure 15 In some embodiments, at least one side magnet 221 has an inner side surface 2211 facing the central magnetic circuit 21, an outer side surface 2212 disposed opposite to the inner side surface 2211, and two side surfaces 2213 connecting the inner side and the outer side respectively. The length of the inner side surface 2211 is greater than the length of the outer side surface 2212. At least one side surface 2213 is formed with a drainage surface 22131. The length of the side magnet 221 with the drainage surface 22131 decreases in the direction from the inner side surface 2211 to the outer side surface 2212.

[0064] Reference Figure 14 , Figure 14In this diagram, d2 represents the length of the inner side surface 2211, and d1 represents the length of the outer side surface 2212. It can be seen that along the direction from the inner side surface 2211 to the outer side surface 2212, which is the second direction (as indicated by arrow Y pointing upwards), the length of the side magnet 221 decreases from d2 to d1. The side magnet 221 may include the inner side surface 2211 and the outer side surface 2212, which are arranged opposite each other. The outer side surface 2212 refers to the side facing the outside of the sound-generating unit 10, or the side facing the inner wall surface of the housing 1. The inner side surface 2211 refers to the side facing the central magnetic circuit 21. If the central magnetic circuit 21 includes a central magnet 211, the inner side surface 2211 refers to the surface facing the central magnet 211. The length of the inner side surface 2211 is greater than the length of the outer side surface 2212, and the airflow guiding surface 22131 is set on the side surface 2213. This makes the length of the side magnet 221 with the airflow guiding surface 22131 decrease from the inner side surface 2211 to the outer side surface 2212, or from the inside of the sound-emitting unit 10 to the outside. Consequently, the cross-sectional area of ​​the corresponding airflow channel 6 increases, which helps to reduce airflow velocity and improve sound quality. It should be noted that the length of the side magnet 221 here is not the same as the length direction mentioned earlier. Here, the length refers to the length of the side magnet 221 on the line perpendicular to the center of the sound-emitting unit 10 and the center of the side magnet 221 within the XY plane, that is, within the plane formed by the first and second directions. It can also be considered as the length of the longer side of the side magnet 221.

[0065] Reference Figure 14 In some embodiments, the inner side 2211 and the outer side 2212 are arranged in parallel, and the line connecting the center of the inner side 2211 and the center of the outer side 2212 is defined as the axis of symmetry. Each side 2213 is provided with a drainage surface 22131, and the two drainage surfaces 22131 are arranged symmetrically about the axis of symmetry.

[0066] The inner surface 2211 and the outer surface 2212 are arranged in parallel, meaning that for the same side magnet 221, the inner surface 2211 and the outer surface 2212 can both extend along a first direction or both extend along a second direction. In this embodiment, each side surface 2213 is provided with a drainage surface 22131, and the two drainage surfaces 22131 are symmetrically arranged about the axis of symmetry, so that the airflow channels 6 on both sides of the side magnet 221 are also the same. Here, "the same" means that the cross-sectional area at corresponding positions is the same, so that the airflow can flow out from each airflow channel 6 evenly, ensuring the uniformity of sound production.

[0067] Regarding the specific form of each side 2213, at least the following embodiments are included:

[0068] Reference Figure 15In some embodiments, each side surface 2213 includes a straight surface 22132 and an inclined surface 22133 connected to each other. The side of the straight surface 22132 away from the inclined surface 22133 is connected to the inner side surface 2211, and the side of the inclined surface 22133 away from the straight surface 22132 is connected to the outer side surface 2212. The inclined surface 22133 is a drainage surface 22131.

[0069] Here, the straight surface 22132 refers to a surface extending along the first or second direction, where the cross-sectional area of ​​the airflow channel 6 remains almost unchanged. Specifically, if the side magnets 221 with the drainage surface 22131 are distributed along the first direction on both sides of the central magnetic circuit 21, then the straight surface 22132 also extends along the first direction. If the side magnets 221 with the drainage surface 22131 are distributed along the second direction on both sides of the central magnetic circuit 21, then the straight surface 22132 also extends along the second direction. The inclined surface 22133 refers to a relatively inclined surface, which is the drainage surface 22131 in this embodiment. The inclination here can mean that it is neither parallel nor perpendicular to the first or second direction. Since the drainage surface 22131 is facing the airflow channel 6, the cross-sectional area of ​​the airflow channel 6 corresponding to the drainage surface 22131 gradually increases from the inside to the outside of the sound-emitting body, thus making the cross-sectional area of ​​the airflow channel 6 show an increasing trend. It should be noted that the inclined plane 22133 here can be either a straight inclined plane or an inclined curved plane.

[0070] Reference Figure 15 In some embodiments, each side surface 2213 includes a straight surface 22132 and a curved surface 22134 connected to each other. The side of the straight surface 22132 away from the curved surface 22134 is connected to the inner side surface 2211, and the side of the curved surface 22134 away from the straight surface 22132 is connected to the outer side surface 2212. The curved surface 22134 is a drainage surface 22131.

[0071] Similar to the previous embodiment, the straight surface 22132 here refers to a surface extending along the first or second direction. At the position of the straight surface 22132, the cross-sectional area of ​​the airflow channel 6 remains almost unchanged. Specifically, if the side magnets 221 with the drainage surface 22131 are distributed along the first direction on both sides of the central magnetic circuit 21, then the straight surface 22132 also extends along the first direction. If the side magnets 221 with the drainage surface 22131 are distributed along the second direction on both sides of the central magnetic circuit 21, then the straight surface 22132 also extends along the second direction. The curved surface 22134, which is the drainage surface 22131 in this embodiment, can be curved, with a curved cross-sectional shape. The curved surface 22134 faces the airflow channel 6. The fluctuation of the curved surface 22134 allows the cross-sectional area of ​​the airflow channel 6 corresponding to the drainage surface 22131 to gradually increase from the inside to the outside of the sound-emitting body, thus causing the cross-sectional area of ​​the airflow channel 6 to show an increasing trend.

[0072] Reference Figure 16 In some embodiments, each side surface 2213 includes a slope 22133, the two sides of which are connected to the inner side surface 2211 and the outer side surface 2212 respectively, and the slope 22133 is a drainage surface 22131.

[0073] In this embodiment, the side surface 2213 is an inclined surface 22133, and the drainage surface 22131 is also an inclined surface 22133, meaning the entire side surface 2213 is an inclined surface 22133. An inclined surface 22133 refers to a surface that is relatively inclined. This inclination can mean that it is neither parallel nor perpendicular to the first or second direction. Since the drainage surface 22131 faces the airflow channel 6, the cross-sectional area of ​​the airflow channel 6 corresponding to the drainage surface 22131 gradually increases from the inside of the sound-emitting body to the outside, thus causing the cross-sectional area of ​​the airflow channel 6 to gradually increase.

[0074] Reference Figure 16 (d) and Figure 17 In some embodiments, each side surface 2213 includes a curved surface 22134, the two sides of which are connected to the inner side surface 2211 and the outer side surface 2212 respectively, and the curved surface 22134 is a drainage surface 22131.

[0075] In this embodiment, the side surface 2213 is a curved surface 22134, and the drainage surface 22131 is also a curved surface 22134, meaning the entire side surface 2213 is a curved surface 22134. The curved surface 22134 can be a curved arc surface with a cross-sectional shape of... Figure 16 The curve shown in (d) can also be a undulating surface 22134, with a cross-sectional shape of... Figure 17As shown in (e), there is a wavy line, and the curved surface 22134 is set facing the airflow channel 6. The undulation of the curved surface 22134 can make the cross-sectional area of ​​the airflow channel 6 corresponding to the airflow surface 22131 gradually increase in the direction from the inside of the sound-emitting body to the outside, thus making the cross-sectional area of ​​the airflow channel 6 gradually increase.

[0076] Reference Figure 17 In some embodiments, each side surface 2213 includes an interconnected inclined surface 22133 and curved surface 22134, and the drainage surface 22131 includes an inclined surface 22133 and curved surface 22134; the side of the inclined surface 22133 away from the curved surface 22134 is connected to the inner side surface 2211, and the side of the curved surface 22134 away from the inclined surface 22133 is connected to the outer side surface 2212; or, each side surface 2213 includes an interconnected inclined surface 22133 and curved surface 22134, and the drainage surface 22131 includes an inclined surface 22133 and curved surface 22134; the side of the curved surface 22134 away from the inclined surface 22133 is connected to the inner side surface 2211, and the side of the inclined surface 22133 away from the curved surface 22134 is connected to the outer side surface 2212.

[0077] In this embodiment, the side surface 2213 can be composed of interconnected inclined surfaces 22133 and curved surfaces 22134. The curved surface 22134 is set facing the airflow channel 6. The fluctuation of the curved surface 22134 can make the cross-sectional area of ​​the airflow channel 6 corresponding to the guide surface 22131 gradually increase in the direction from the inside to the outside of the sound-emitting body. Similarly, by setting the inclined surface 22133 and controlling the tilt direction, the cross-sectional area of ​​the airflow channel 6 corresponding to the guide surface 22131 gradually increases, which can also make the cross-sectional area of ​​the airflow channel 6 show an increasing trend. As for the specific connection relationship between the curved surface 22134 and the inclined surface 22133, it can be that the side of the inclined surface 22133 away from the curved surface 22134 is connected to the inner surface 2211, and the side of the curved surface 22134 away from the inclined surface 22133 is connected to the outer surface 2212; or it can be that the side of the curved surface 22134 away from the inclined surface 22133 is connected to the inner surface 2211, and the side of the inclined surface 22133 away from the curved surface 22134 is connected to the outer surface 2212.

[0078] In some embodiments, each side surface 2213 may further include a combination of inclined surface 22133, curved surface 22134, and straight surface 22132, and the number of any one of inclined surface 22133, curved surface 22134, and straight surface 22132 is not limited to one. Those skilled in the art will understand that any implementation using a combination of the above embodiments is within the scope of protection of this application.

[0079] 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.

[0080] 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 provided between the diaphragm 32 and the main sound-emitting hole 202. The number of air channels 7 is equal to the number of secondary sound-emitting holes 203 and is provided in a one-to-one correspondence. A secondary sound output channel 205 is provided between the air channel 7 and the corresponding secondary sound-emitting hole 203.

[0081] The smart glasses can be virtual reality glasses, augmented reality glasses, or mixed reality glasses. Both the main sound-emitting hole 202 and the secondary sound-emitting hole 203 are located on the outer shell of the temple 20. The outer shell forms a receiving space 201, which is connected to the air channel 7 via a groove 12 on the outer shell. This allows airflow within the receiving cavity to pass through the air channel 7, the groove 12, and the secondary sound-emitting channel 205, finally exiting from the secondary sound-emitting hole 203.

[0082] Of course, it should also be noted that if an airflow channel 6 is formed between the end of each magnet 221 and the inner wall surface of the housing 1, and at least one magnet 221 has a guide surface 22131 on the side facing the airflow channel 6, the airflow channel 6 can also be connected to the auxiliary sound outlet 203 through the auxiliary sound outlet 205, so that the airflow in the rear cavity 11 can also be emitted from the auxiliary sound outlet 203 through the airflow channel 6, the groove 12, and the auxiliary sound outlet 205.

[0083] Specifically, refer to Figure 18 and Figure 19The 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 15 As shown in Figure D, an air channel 7 is connected to a corresponding secondary sound outlet 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.

[0084] In some embodiments, the number of air channels 7 and the number of secondary sound-emitting holes 203 are both two, with the two secondary sound-emitting holes 203 respectively disposed on the upper and lower sides of the temple. The number of air channels 7 is two, with each air channel 7 corresponding to one of the two secondary sound-emitting holes 203. When an airflow channel 6 is provided, the number of airflow channels 6 can also be two, with each airflow channel 6 corresponding to one of the two secondary sound-emitting holes 203.

[0085] Reference Figure 20 The sound-emitting unit 10 is provided with two air channels 7, each air channel 7 corresponding to a secondary sound-emitting hole 203. Depending on the placement of the sound-emitting unit 10, the two secondary sound-emitting holes 203 can be respectively located 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 air channels 7 and the secondary sound-emitting holes 203 is also formed within the accommodating space 201. The sound output path is as follows: Figure 16 As shown in Figure E, by radiating sound waves with opposite phase to the main sound-emitting hole 202 from the upper and lower sides of the temple, it can better prevent sound leakage and protect user privacy.

[0086] 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 producing monomer, characterized in that, The sound production unit comprises a shell, a magnetic circuit system and a vibration system, the shell is fixedly connected with the magnetic circuit system, the vibration system comprises a voice coil and a diaphragm connected with the voice coil, the outer periphery of the diaphragm is fixed to the shell, the vibration system, the magnetic circuit system and the shell enclose a back cavity; the magnetic circuit system comprises a center magnetic circuit and a side magnetic circuit arranged at the outer periphery of the center magnetic circuit, the center magnetic circuit and the side magnetic circuit are arranged in a spaced manner and form a gap, the voice coil is at least partially arranged in the gap, the side magnetic circuit comprises a side magnet and a side magnetic guide plate arranged on the side magnet, and a notch with an opening facing outward is arranged at the edge of the side magnetic guide plate; The shell is provided with a groove at the position corresponding to the notch, the groove is in communication with the notch to form an air passage, and the air passage is in communication with the back cavity and an external space; The side magnet is recessed in a direction away from the notch to form a flow passage in communication with the notch at the position corresponding to the notch; The end of each side magnet and the inner wall surface of the shell form an air flow passage, the shell is provided with a communication passage in communication with the air flow passage, and at least one side of the side magnet is provided with a flow guide surface to make the cross-sectional area of the corresponding air flow passage increase from the inside to the outside of the sound production unit.

2. The sound producing monomer of claim 1, wherein, The magnetic circuit system further comprises a magnetic yoke, the magnetic yoke comprises a rectangular center part, a bending part arranged around the center part, and a side wall extended from the center part in the same direction, the bending part and the center part are arranged on both sides of the side wall, the center magnetic circuit is fixed to the center part and spaced from the side wall to form a first magnetic gap, and the side magnetic circuit is fixed to the bending part and spaced from the side wall to form a second magnetic gap.

3. The sound production unit of claim 2, wherein The number of side walls is two, and the two side walls are arranged on opposite sides of the center part, and each side wall is connected to the corresponding bending part away from the center part; or The number of side walls and bending parts is four, and each bending part is formed by reversely bending and extending from one end of the corresponding side wall away from the center part.

4. The sound producing monomer of claim 2, wherein, The number of vibration systems is two, two diaphragms are arranged on both sides of the shell along the thickness direction, and two voice coils are connected to two diaphragms one by one, one voice coil is arranged corresponding to the first magnetic gap, and the other voice coil is arranged corresponding to the second magnetic gap; the side magnetic guide plate comprises an upper magnetic guide plate and a lower magnetic guide plate, the upper magnetic guide plate and the lower magnetic guide plate are arranged on both sides of the side magnet along the thickness direction, the lower magnetic guide plate is the bending part of the magnetic yoke, and the upper magnetic guide plate and / or the lower magnetic guide plate is provided with the notch.

5. The sound producing monomer of claim 4, wherein, The shell comprises an upper shell and a lower shell, the upper shell and the lower shell are arranged on both sides of the magnetic circuit system along the thickness direction, the notch is arranged on the upper magnetic guide plate and the lower magnetic guide plate, and the upper shell and the lower shell are provided with the groove at the position corresponding to the notch.

6. The sound producing monomer of claim 5, wherein, The notches of the upper magnetic guide plate and the lower magnetic guide plate are arranged corresponding to each other in the thickness direction.

7. The sound producing monomer of claim 4, wherein, The bending part comprises two first edge parts arranged in parallel along a first direction and two second edge parts arranged in parallel along a second direction, the first direction and the second direction being perpendicular to each other; At least one of the first edge parts is provided with at least one notch; and / or, At least one of the second edge parts is provided with at least one notch.

8. The sound producing monomer of claim 1, wherein, At least one of the edge magnets has an inner side surface facing the center magnetic circuit, an outer side surface opposite to the inner side surface, and two edge side surfaces respectively connecting the inner side surface and the outer side surface, the length of the inner side surface is greater than the length of the outer side surface, at least one of the edge side surfaces is formed with the flow guide surface, and the length of the edge magnet with the flow guide surface decreases from the inner side surface to the outer side surface.

9. The sound producing monomer of claim 8, wherein, Each of the edge side surfaces comprises a straight surface and an inclined surface connected to each other, the side of the straight surface away from the inclined surface is connected to the inner side surface, the side of the inclined surface away from the straight surface is connected to the outer side surface, and the inclined surface is the flow guide surface; or, Each of the edge side surfaces comprises a straight surface and a curved surface connected to each other, the side of the straight surface away from the curved surface is connected to the inner side surface, the side of the curved surface away from the straight surface is connected to the outer side surface, and the curved surface is the flow guide surface.

10. A smart wearable device, characterized by, The smart wearable device comprises the sound production monomer according to any one of claims 1 to 9.

11. The smart wearable device of claim 10, wherein, The smart wearable device is smart glasses, the smart glasses comprise a frame and two legs respectively arranged on two sides of the frame, the legs are provided with a receiving space, a main sound production hole and at least one auxiliary sound production hole in communication with the receiving space, the sound production monomer is arranged in the receiving space, a main sound outlet channel is arranged between the diaphragm and the main sound production hole, the number of air channels is equal to and one-to-one corresponds to the number of auxiliary sound production holes, and a auxiliary sound outlet channel is arranged between the air channel and the corresponding auxiliary sound production hole.

12. The smart wearable device of claim 11, wherein, The number of air channels and the number of auxiliary sound production holes are both two, and the two auxiliary sound production holes are respectively arranged on the upper side and the lower side of the leg.

Images