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 shell, a magnetic circuit system, and two vibration systems. The magnetic circuit system is located within the housing cavity of the shell and includes a magnetic yoke, a central magnetic circuit, and a side magnetic circuit. The magnetic yoke includes a central portion, a sidewall extending in the same direction along the outer edge of the central portion, and a bent portion extending in the opposite direction from the end of the sidewall away from the central portion. The central magnetic circuit and the side magnetic circuit are located on opposite sides of the sidewall. The central magnetic circuit is fixed to the central portion and forms a first magnetic gap with the sidewall, while the side magnetic circuit is fixed to the bent portion and forms a second magnetic gap with the sidewall. At least one sidewall has an opening, and the side magnetic circuit has an airflow channel corresponding to the opening and communicating with the opening. This invention, by additionally providing an opening and an airflow channel, adds a flow channel for air in the rear cavity, effectively increasing the effective opening area of ​​the rear cavity, reducing airflow velocity, and improving 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 this application, the present invention proposes a sound-generating unit, comprising:

[0005] A housing, the interior of which forms a receiving cavity;

[0006] A magnetic circuit system is located within the receiving cavity. The magnetic circuit system includes a magnetic yoke, a central magnetic circuit, and a side magnetic circuit. The magnetic yoke includes a central portion, a sidewall extending in the same direction along the outer edge of the central portion, and a bent portion extending in the opposite direction from the end of the sidewall away from the central portion. The central magnetic circuit and the side magnetic circuit are respectively disposed on opposite sides of the sidewall. The central magnetic circuit is fixed to the central portion and forms a first magnetic gap with the sidewall. The side magnetic circuit is fixed to the bent portion and forms a second magnetic gap with the sidewall. At least one of the sidewalls is provided with an opening, and the side magnetic circuit is provided with an airflow channel communicating with the opening corresponding to the opening.

[0007] Two vibration systems are provided, each of which includes a diaphragm and a voice coil connected to the diaphragm. The two diaphragms are respectively disposed on both sides of the housing along the thickness direction, 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.

[0008] In some embodiments, the side magnetic circuit includes a plurality of side magnets surrounding the periphery of the central magnetic circuit, all of which are fixed to the bending portion, and the side magnets corresponding to the openings are provided with airflow channels.

[0009] In some embodiments, the airflow channel includes an airflow groove disposed on the side magnet, the airflow groove communicating with the opening, the airflow groove being formed by a portion of the surface of the side magnet being recessed inward, and the airflow groove extending from the interior of the sound-generating unit in a direction to the outside.

[0010] In some embodiments, the side magnet is provided with airflow grooves on both sides along the height direction.

[0011] In some embodiments, the airflow channel includes an airflow hole disposed within the side magnet, the airflow hole communicating with the opening, and the airflow hole extending from the interior of the sound-generating unit outward.

[0012] In some embodiments, a notch is provided on the side of the bent portion near the sidewall, and the notch communicates with the opening.

[0013] In some embodiments, the central portion is rectangular in shape, and there are four sidewalls and four bends. A gap is provided between two adjacent sidewalls, and the opening is located in the middle of the sidewall.

[0014] In some embodiments, the length of the bend is greater than the length of the sidewall to which it is connected.

[0015] In some embodiments, the sidewall includes two first sub-walls arranged along a first direction and two second sub-walls arranged along a second direction, with the openings provided on the two second sub-walls; wherein, the first direction is the length direction of the sound-emitting unit, and the second direction is the width direction of the sound-emitting unit.

[0016] In some embodiments, the housing is provided with a connecting channel corresponding to the position of the airflow channel.

[0017] 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.

[0018] According to some embodiments of this application, the present invention provides a smart wearable device, the smart wearable device comprising the aforementioned sound-emitting unit.

[0019] 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 two auxiliary sound-emitting holes 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 two auxiliary sound-emitting holes are respectively disposed on the upper and lower sides of the temples. A secondary sound output channel is provided between the airflow channel and the auxiliary sound-emitting holes. There are two airflow channels, and the two airflow channels are configured one-to-one with the two auxiliary sound-emitting holes.

[0020] In the above scheme, the sound-generating unit includes a shell, a magnetic circuit system, and two vibration systems. The shell forms a receiving cavity. The magnetic circuit system is located in the receiving cavity and includes a magnetic yoke, a central magnetic circuit, and a side magnetic circuit. The magnetic yoke includes a central part, a side wall that bends and extends in the same direction along the outer edge of the central part, and a bent part that bends and extends in the opposite direction from the end of the side wall away from the central part. The central magnetic circuit and the side magnetic circuit are respectively located on opposite sides of the side wall. The central magnetic circuit is fixed to the central part and forms a first magnetic gap with the side wall. The side magnetic circuit is fixed to the bent part and forms a second magnetic gap with the side wall. At least one side wall is provided with an opening, and the side magnetic circuit is provided with an airflow channel communicating with the opening. Each vibration system includes a diaphragm and a voice coil connected to the diaphragm. The two diaphragms are respectively located on both sides of the shell along the thickness direction. One voice coil is provided corresponding to the first magnetic gap, and the other voice coil is provided corresponding to the second magnetic gap. This invention adds a flow channel for the air in the rear cavity by setting additional openings and airflow channels, which can effectively increase the effective opening area of ​​the rear cavity, reduce the airflow velocity, and improve the sound quality. Attached Figure Description

[0021] 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.

[0022] Figure 1 This is a schematic diagram of the structure of the sound-generating unit according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of an exploded structure of the sound-generating monomer according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the magnetic yoke of the sound-generating unit in an embodiment of the present invention;

[0025] Figure 4 This is a partial structural schematic diagram of the sound-generating unit according to an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the side magnet of the sound-generating unit according to an embodiment of the present invention;

[0027] Figure 6 This is another structural schematic diagram of the side magnet of the sound-generating unit in an embodiment of the present invention;

[0028] Figure 7 This is another structural schematic diagram of the edge magnet of the sound-generating unit in an embodiment of the present invention;

[0029] Figure 8This is another exploded structural diagram of the sound-generating monomer according to an embodiment of the present invention;

[0030] Figure 9 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;

[0031] Figure 10 This is a schematic diagram of the side magnet of the sound-generating unit in an embodiment of the present invention;

[0032] Figure 11 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;

[0033] Figure 12 for Figure 11 Another structural diagram from a different perspective;

[0034] Figure 13 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;

[0035] Figure 14 for Figure 13 Another structural diagram from a different perspective;

[0036] Figure 15 A schematic diagram of the structure of the support piece of the sound-generating unit in an embodiment of the present invention;

[0037] Figure 16 A partial structural diagram of the temple of the smart glasses according to an embodiment of the present invention;

[0038] Figure 17 for Figure 16 Schematic diagram of the cross-sectional structure in the BB direction;

[0039] Figure 18 for Figure 16 A schematic diagram of the cross-sectional structure along the AA direction.

[0040] Explanation of icon numbers:

[0041] 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 magnet; 2211. Connecting section; 2212. Bending section; 2213. Groove; 2214. Recess; 23. Magnetic yoke; 231. Central part; 2311. Through hole; 232. Side wall; 2321. Opening; 2322. First sub-wall; 2323. Second sub-wall; 233. Bending part; 2331. Notch; 234. Gap; 3. Vibration system; 31. Voice coil; 32. Diaphragm; 4. First magnetic gap; 5. Second magnetic gap; 6. Airflow channel; 61. Airflow groove; 62. Airflow hole; 7. Support plate; 71. Inner frame; 72. Outer frame; 73. Connector; 74. Solder pad;

[0042] 20. Temple; 201. Accommodation space; 202. Main sound port; 203. Secondary sound port; 204. Main sound outlet channel; 205. Secondary sound outlet channel.

[0043] 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

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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 sound-generating unit described in this application includes a housing, a magnetic circuit system, and a vibration system. The housing is fixedly connected to the magnetic circuit system, and 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 the rear cavity.

[0049] Please see Figures 1 to 4According to some embodiments of this application, the present invention proposes a sound-generating unit 10, including a housing 1, a magnetic circuit system 2, and two vibration systems 3. The housing 1 forms an internal cavity. The magnetic circuit system 2 is located within the cavity and includes a magnetic yoke 23, a central magnetic circuit 21, and side magnetic circuits 22. The magnetic yoke 23 includes a central portion 231, sidewalls 232 extending in the same direction along the outer edge of the central portion 231, and a bent portion 233 extending in the opposite direction from one end of the sidewalls 232 away from the central portion 231. The central magnetic circuit 21 and the side magnetic circuits 22 are respectively located on opposite sides of the sidewalls 232. The central magnetic circuit 21 is fixed. A first magnetic gap 4 is formed at the center 231 and spaced apart from the side wall 232. The side magnetic path 22 is fixed to the bent portion 233 and forms a second magnetic gap 5 at the side wall 232. At least one side wall 232 is provided with an opening 2321. The side magnetic path 22 is provided with an airflow channel 6 communicating with the opening 2321. Each vibration system 3 includes a diaphragm 32 and a voice coil 31 connected to the diaphragm 32. The two diaphragms 32 are respectively provided on both sides of the housing 1 along the thickness direction. One voice coil 31 is provided corresponding to the first magnetic gap 4, and the other voice coil 31 is provided corresponding to the second magnetic gap 5.

[0050] Taking the speaker unit 10 as an example: the housing 1 refers to the outer shell of the speaker; the magnetic circuit system 2 refers to the components used to provide the magnetic circuit, which generally consists of a central magnetic circuit 21 and a side magnetic circuit 22, used to provide the 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.

[0051] The sidewall 232 extends vertically upward from the edge of the central portion 231. The bent portion 233 extends outward from the sidewall 232 away from the central portion 231 to form the bent portion 233. The magnetic yoke 23 forms a recessed groove. The central magnetic circuit 21 is disposed on the central portion 231, and a first magnetic gap 4 is formed between it and the sidewall 232. A second magnetic gap 5 is formed between the side magnetic circuit 22 and the sidewall 232. There are two vibration systems 3. The sound-generating unit 10 is a double-sided sound-generating unit 10 with two diaphragms 32. The two diaphragms 32 are disposed opposite to each other on both sides of the housing 1 along the thickness direction of the housing 1. The thickness direction of 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.

[0052] The presence of an opening 2321 on at least one sidewall 232 refers to the presence of one or at least two sidewalls 232 with openings 2321. An airflow channel 6 is provided at the position of the side magnetic circuit 22 corresponding to the sidewall 232 with the opening 2321. The opening 2321 is connected to the airflow channel 6, allowing the airflow in the rear cavity to flow to the outside space through the opening 2321 and the airflow channel 6. This embodiment, by additionally providing the opening 2321 and the airflow channel 6, adds a flow channel for the air in the rear cavity, which can effectively increase the effective opening area of ​​the rear cavity, reduce the airflow velocity, and improve the sound quality.

[0053] Reference Figure 3 and Figure 4 In some embodiments, a notch 2331 is provided on the side of the bent portion 233 near the sidewall 232, and the notch 2331 communicates with the opening 2321. In this embodiment, not only is the opening 2321 provided on the sidewall 232, but in order to increase the opening area for gas flow and facilitate the airflow channel 6 through the opening 2321, a notch 2331 can also be provided on the side of the bent portion 233 facing the sidewall 232. The notch 2331 is also a through hole, and the communication between the notch 2331 and the opening 2321 is equivalent to increasing the opening area, which can further reduce the airflow velocity and improve the sound quality.

[0054] Reference Figure 3 and Figure 4 In some embodiments, the central portion 231 is rectangular in shape, and there are four sidewalls 232 and four bends 233. A gap 234 is provided between two adjacent sidewalls 232, and the opening 2321 is located in the middle of the sidewall 232. The central portion 231 is a rectangular plate, and the sidewalls 232 extend from the four sides of the rectangular plate, but there is no sidewall 232 at the top corner of the rectangular plate. Therefore, a gap 234 is formed between two adjacent sidewalls 232, and this gap 234 can also be used for airflow. However, the applicant should specifically point out that this gap 234 is different from the opening 2321 in this application. The gap 234 is formed at the two edges of the sidewall 232 and is formed by the cooperation of two adjacent sidewalls 232. The opening 2321 is generally located in the approximate middle of the sidewall 232 and is an additional gas flow path provided outside the gap 234.

[0055] Reference Figure 3 and Figure 4In some embodiments, the length of the bent portion 233 is greater than the length of the sidewall 232 to which it is connected. Firstly, the bent portion 233 can be used as a magnetic guide plate; a longer length results in better magnetization and improves magnetic field strength. Secondly, a side magnet 221 is fixedly mounted on the bent portion 233, forming a second magnetic gap 5 between the side magnet 221 and the corresponding sidewall 232. If the bent portion 233 is shorter than the sidewall 232, the space for mounting the side magnet 221 is limited, and the length of the side magnet 221 cannot exceed the length of the sidewall 232. A smaller side magnet 221 may result in a weaker magnetic field. By setting the length of the bent portion 233 to be greater than the length of the corresponding sidewall 232, a longer magnet can generate a stronger magnetic field, and the sidewall 232 can be fully utilized to form a longer magnetic gap, providing a greater driving force for the vibration of the voice coil 31 and the diaphragm 32.

[0056] Reference Figure 3 and Figure 4 In some embodiments, the sidewall 232 includes two first sub-walls 2322 arranged along a first direction and two second sub-walls 2323 arranged along a second direction, with the openings 2321 provided on the two second sub-walls 2323; wherein, the first direction is the length direction of the sound-emitting unit 10, such as... Figure 3 As indicated by the middle arrow X, the second direction is the width direction of the sound-emitting unit 10, as shown in the figure. Figure 3 As indicated by arrow Y. When the number of side magnets 221 is four, including two short-axis magnets arranged along the first direction and two long-axis magnets arranged along the second direction, holes 2321 are opened on the two second sub-walls 2323, and the corresponding side magnets 221 have airflow channels 6 opened on the long-axis magnets.

[0057] In some embodiments, the side magnetic circuit 22 includes a plurality of side magnets 221 surrounding the outer periphery of the central magnetic circuit 21. Each of the side magnets 221 is fixed to the bending portion 233, and the side magnets 221 corresponding to the opening 2321 are provided with the airflow channel 6. Regarding the specific form of the side magnets 221, at least the following two embodiments are included;

[0058] In the first embodiment, there are four side magnets 221, using a conventional design. The four side magnets 221 are arranged around the central magnetic circuit 21, spaced apart, and all four side magnets 221 are fixed to the bending portion 233. Unlike related technologies, this embodiment has an airflow channel 6 on the side magnet 221 corresponding to the opening 2321 on the side wall 232. The airflow channel 6 connects the opening 2321 to the external environment, allowing the gas in the containment cavity to flow out of the external environment sequentially through the opening 2321 and the airflow channel 6, thus realizing the outflow of air.

[0059] The number of side magnets 221 is four. Regarding the specific implementation of the airflow channel 6, at least the following two implementation methods are included:

[0060] Reference Figure 4 and Figure 5 Regarding the conventional four-magnet design for the side magnet 221, there are two implementation methods. In the first implementation, the airflow channel 6 includes an airflow groove 61 disposed on the side magnet 221. The airflow groove 61 communicates with the opening 2321. The airflow groove 61 is formed by an inward indentation of a portion of the surface of the side magnet 221, and extends from the inside of the sound-generating unit 10 outward. The airflow channel 6 can be formed by a recessed groove on the surface, specifically by an inward indentation of a portion of the surface of the side magnet 221. This surface can be an upper surface and a lower surface along the height direction. The airflow groove 61 can be provided only on the upper surface or only on the lower surface. Of course, referring to… Figure 6 Furthermore, airflow grooves 61 can be provided on both the upper and lower surfaces. The number of airflow grooves 61 on each surface can be one or more. Those skilled in the art will understand that the number of openings 2321 on the corresponding sidewall 232 can be one or more. The method of creating airflow grooves 61 on the side magnet 221 is simple and facilitates air circulation.

[0061] Reference Figure 7 In the second embodiment, the airflow channel 6 includes an airflow hole 62 disposed within the side magnet 221. The airflow hole 62 communicates with the opening 2321 and extends outward from the interior of the sound-generating unit 10. The airflow hole 62 is a through hole disposed within the side magnet 221. The air inlet of the airflow hole 62 faces the interior of the receiving cavity, and the air outlet of the airflow hole 62 communicates with the opening 2321. The airflow hole 62 also serves to provide an airflow output channel, and the placement of the airflow hole 62 within the side magnet 221 reduces the risk of surrounding components obstructing the airflow channel 6 and affecting gas flow.

[0062] Reference Figures 8 to 10In the second embodiment, the side magnet 221 includes two C-shaped magnets. Each 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 a slot 2213. The C-shaped structure here can be a roughly C-shaped structure such as a circular arc, an elliptical arc, or a rectangular structure with a slot. The slots 2213 of the two side magnets 221 are arranged opposite each other, meaning that the slot 2213 of one side magnet 221 faces the other side magnet 221. At least one pair of opposite bent segments 2212 of the two side magnets 221 are arranged at intervals to form airflow channels 6. Since one side magnet 221 has two bent segments 2212, the two side magnets 221 are arranged opposite each other, resulting in two pairs of opposite bent segments 2212. In the two pairs, one pair of bent segments 2212 can be arranged at intervals to form airflow channels 6, or both pairs can be arranged at intervals to form opposite airflow channels 6. The airflow channels 6 are connected to the receiving cavity through openings. When there are two airflow channels 6, they are respectively connected to opposite sides of the receiving cavity. The receiving cavity is connected to the outside through openings and airflow channels 6.

[0063] Reference Figures 11 to 14 In some specific embodiments, two connecting segments 2211 are respectively disposed on both sides of the central magnetic circuit 21 along the first direction, and two bent segments 2212 of each side magnet 221 are respectively disposed on both sides of the central magnetic circuit 21 along the 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 side 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 side magnet 221 and the central magnetic circuit 21, driving the voice coil 31 located within the magnetic gap to vibrate.

[0064] Reference Figures 9 to 10In some embodiments, each side magnet 221 has a groove 2214, and the groove 2214 has a slot 2213. Two central sub-magnets 211 are correspondingly arranged with the two side magnets 221, and each side magnet 221 surrounds the corresponding central sub-magnet 211 on three sides. The corresponding arrangement of each central sub-magnet 211 and each side magnet 221 can form a magnetic field. Since there are two central sub-magnets 211 and two side 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 sub-magnet 211 on three sides with the side magnets 221 also aims to form a stronger magnetic field, increasing the driving force for the voice coil 31 to vibrate. Furthermore, a central magnetic guide plate 212 can be provided on the side of the central sub-magnet 211 away from the central portion 231.

[0065] 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 may be a first 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 is emitted 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.

[0066] 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.

[0067] Reference Figure 15In 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. This embodiment applies to the technical solution using two C-type magnets in this application, which is equivalent to connecting the two originally adjacent side magnets 221 together, making it impossible to run wires. If wires were run, the voice coil 31 would interfere with the C-type magnets during vibration. Therefore, a two-layer structure of inner frame 71 and outer frame 72 is designed. Pad 74 is provided on the inner frame 71, and the pad 74 is connected to the voice coil 31. The signal is then transmitted through the connector 73 and traces on the outer frame 72, 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 routing.

[0068] 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.

[0069] 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 two auxiliary sound-emitting holes 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. Here, the main sound output channel 204 can be considered as the front cavity. The two auxiliary sound-emitting holes 203 are respectively disposed on the upper and lower sides of the temples 20. There are two airflow channels 6, and the two airflow channels 6 are disposed one-to-one with the two auxiliary sound-emitting holes 203.

[0070] 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.

[0071] 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.

[0072] 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 12 As shown in D1 and D2. Specifically, the secondary sound-emitting hole 203 can be positioned on the side of the main sound-emitting hole 202 away from the frame. This reduces the impact of the sound signal emitted by the secondary sound-emitting hole 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-emitting hole 203, and the sound waves radiated outward from the front acoustic cavity are emitted from the main sound-emitting hole 202, the two sound waves are out of phase and can cancel each other out. This makes it difficult for the person next to the wearer to receive the sound, thus protecting the user's privacy and reducing the risk of information leakage.

[0073] 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 application relates to a loudspeaker, which comprises a shell, a magnetic circuit system, two vibration systems and a sound emitting unit. The shell is internally formed with a containing cavity. The magnetic circuit system is located in the containing cavity and comprises a magnetic yoke, a center magnetic circuit and a side magnetic circuit. The magnetic yoke comprises a center part, a side wall extending from the outer edge of the center part and a bending part extending from one end of the side wall away from the center part. The center magnetic circuit and the side magnetic circuit are arranged on the opposite sides of the side wall.

2. The sound producing monomer of claim 1, wherein, The center magnetic circuit is fixed to the center part and spaced from the side wall to form a first magnetic gap.

3. The sound producing monomer of claim 2, wherein, The side magnetic circuit is fixed to the bending part and spaced from the side wall to form a second magnetic gap.

4. The sound producing monomer of claim 3, wherein, At least one of the side walls is provided with an opening.

5. The sound producing monomer of claim 2, wherein, The side magnetic circuit comprises a plurality of side magnets arranged around the outer periphery of the center magnetic circuit.

6. The sound producing monomer of any one of claims 1 to 5, wherein, The plurality of side magnets comprises two C-shaped magnets.

7. The sound producing monomer of any one of claims 1 to 5, wherein, The two side magnets are arranged along a first direction.

8. The sound producing monomer of claim 7, wherein, The center magnetic circuit is located between the two side magnets.

9. The sound producing monomer of any one of claims 1 to 5, wherein, Each side magnet comprises a connecting segment and two bending segments connected to the two ends of the connecting segment.

10. The sound producing monomer of any one of claims 1 to 5, wherein, The two bending segments and the connecting segment form a "C" shaped structure. The two bending segments and the connecting segment form a structure with notches. The notches of the two side magnets are oppositely arranged. At least one pair of opposite bending segments of the two side magnets are spaced apart to form an airflow channel. The airflow channel is arranged corresponding to the opening and communicates with the opening. Each vibration system comprises a diaphragm and a voice coil connected to the diaphragm. One of the voice coils is arranged corresponding to the first magnetic gap. The other voice coil is arranged corresponding to the second magnetic gap. Each side magnet is fixed to the bending part. The side magnet corresponding to the opening is provided with the airflow channel. The airflow channel comprises an airflow groove arranged in the side magnet. The airflow groove is recessed inward from the surface of the side magnet. The airflow groove extends from the inside to the outside of the sound emitting unit. The side magnet is provided with the airflow groove on both sides along the height direction. The airflow channel comprises an airflow through hole arranged in the side magnet. The airflow through hole communicates with the opening. The airflow through hole extends from the inside to the outside of the sound emitting unit. The bending part is provided with a notch close to the side wall. The notch communicates with the opening. The center part is rectangular. The number of the side walls and the bending parts is four. Adjacent two side walls are provided with a gap. The length of the bending part is greater than the length of the side wall connected thereto. The side wall comprises two first sub-walls arranged along a first direction and two second sub-walls arranged along a second direction. The opening is arranged on the two second sub-walls. The first direction is the length direction of the sound emitting unit. The second direction is the width direction of the sound emitting unit. The shell is provided with a communication channel corresponding to the position of the airflow channel.

11. The sound producing monomer of claim 10, wherein, In a cross section perpendicular to the air flow passage, the cross-sectional area of the communication passage is greater than the cross-sectional area of the air flow passage.

12. A smart wearable device, characterized by, The smart wearable device comprises the sound emitting monomer of any one of claims 1 to 11.

13. The smart wearable device of claim 12, wherein, The smart wearable device is smart glasses, the smart glasses comprising a frame and a left leg and a right leg respectively arranged on two sides of the frame, the left leg and the right leg being provided with a containing space, a main sound emitting hole and two auxiliary sound emitting holes in communication with the containing space, the sound emitting monomer being arranged in the containing space, a main sound emitting hole and two auxiliary sound emitting holes being arranged in the left leg and the right leg, respectively, a main sound emitting hole being arranged between the diaphragm and the main sound emitting hole, two auxiliary sound emitting holes being arranged on the upper side and the lower side of the left leg and the right leg, respectively, a secondary sound emitting hole being arranged between the air flow passage and the auxiliary sound emitting hole, the number of the air flow passages being two, and the air flow passages and the auxiliary sound emitting holes being arranged in one-to-one correspondence.

Images