Sound production monomer and intelligent wearable device

Abstract

The invention discloses a sound production single body and intelligent wearable equipment, and relates to the technical field of sound energy conversion, the sound production single body comprises a shell, a magnetic circuit system and a vibration system, a containing cavity is formed in the shell, the magnetic circuit system is located in the containing cavity, and the magnetic circuit system comprises a center magnetic circuit and a side magnetic circuit; the side magnetic circuit comprises a plurality of side sub-magnets arranged on the periphery of the center magnetic circuit in a surrounding mode, an airflow channel is formed between the end of each side sub-magnet and the inner wall face of the shell, and a drainage face is arranged on the side, facing the airflow channel, of at least one side sub-magnet. Therefore, the cross section area of the corresponding air flow channel tends to increase from the inside to the outside of the sound production single body. The vibration system comprises a voice coil and a vibrating diaphragm connected with the voice coil, the center magnetic circuit and the side magnetic circuits are arranged at intervals and form a gap, and at least part of the voice coil is arranged in the gap. The sound production monomer can effectively increase the effective opening area of the rear cavity, reduce the air velocity and improve the sound texture.

Description

Technical Field

[0001] The present invention relates to the technical field of sound energy conversion, and in particular to a sound-emitting unit and an intelligent wearable device. Background Art

[0002] With the development of the portable consumer electronics market, miniature sound-generating devices have been widely used. And with the multifunctionality and miniaturization of portable terminal electronic products, users have higher and higher requirements for sound quality. However, some speakers have poor sound quality. Summary of the Invention

[0003] The main purpose of the present invention is to propose a sound unit and an intelligent wearable device, aiming to solve the technical problem of poor sound quality of some speakers in the related art.

[0004] To achieve the above objectives, according to some embodiments of the present invention, the present invention provides a sound unit, comprising: a housing, wherein a receiving cavity is formed inside the housing; A magnetic circuit system, the magnetic circuit system is located in the accommodating cavity, the magnetic circuit system includes a central magnetic circuit and a side magnetic circuit, the side magnetic circuit includes a plurality of side magnets arranged around the periphery of the central magnetic circuit, an air flow channel is formed between the end of each side magnet and the inner wall surface of the shell, and a drainage surface is provided on a side of at least one side magnet facing the air flow channel, so that the cross-sectional area of ​​the corresponding air flow channel tends to increase from the inside to the outside of the sound unit; A vibration system includes a voice coil and a diaphragm connected to the voice coil, wherein the central magnetic circuit and the side magnetic circuit are spaced apart and form a gap, and the voice coil is at least partially arranged in the gap.

[0005] In some embodiments, the edge magnets include two first edge magnets distributed on opposite sides of the central magnetic circuit along a first direction, and two second edge magnets distributed on opposite sides of the central magnetic circuit along a second direction, wherein the first direction is perpendicular to the second direction; At least one of the first side magnets is provided with the drainage surface; and / or, The drainage surface is provided on at least one of the second side magnets.

[0006] In some embodiments, at least one of the edge magnets has an inner side surface facing the central magnetic circuit, an outer side surface arranged opposite to the inner side surface, and two side surfaces respectively connecting the inner side and the outer side surface, the length of the inner side surface is greater than the length of the outer side surface, and at least one of the side surfaces is formed with the drainage surface, and the length of the edge magnet having the drainage surface tends to decrease in the direction from the inner side surface to the outer side surface.

[0007] 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, the side of the inclined surface away from the straight surface is connected to the outer side surface, and the inclined surface is the drainage surface; or Each of the side surfaces includes 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 drainage surface.

[0008] In some embodiments, each of the side surfaces includes an inclined surface, both sides of the inclined surface are connected to the inner side surface and the outer side surface respectively, and the inclined surface is the drainage surface; or, Each of the side surfaces includes a curved surface, both sides of the curved surface are respectively connected to the inner side surface and the outer side surface, and the curved surface is the drainage surface.

[0009] In some embodiments, each of the side surfaces includes an inclined surface and a curved surface connected to each other, and the drainage surface includes the inclined surface and the curved surface; The side of the inclined surface away from the curved surface is connected to the inner side surface, and the side of the curved surface away from the inclined surface is connected to the outer side surface; or, A side of the curved surface away from the inclined surface is connected to the inner side surface, and a side of the inclined surface away from the curved surface is connected to the outer side surface.

[0010] In some embodiments, the inner side surface and the outer side surface are arranged in parallel, and the line connecting the center of the inner side surface and the center of the outer side surface is defined as the symmetry axis. Each of the side surfaces is provided with the drainage surface, and the two drainage surfaces are arranged axially symmetrically about the symmetry axis.

[0011] In some embodiments, the length of the edge magnet having the diversion surface is smaller than the length of the central magnetic circuit.

[0012] In some embodiments, the magnetic circuit system includes a magnetic yoke, which includes a rectangular central portion, two opposite sides of the central portion are connected to side walls extending in the same direction, and a bent portion extending in the opposite direction from one end of the side wall away from the central portion, the central magnetic circuit is fixed to the central portion and is spaced from the side wall to form a first magnetic gap, and some of the plurality of side magnets are fixed to the bent portion and are spaced from the side wall to form a second magnetic gap.

[0013] In some embodiments, a through hole is provided in the central area of ​​the central portion, and the central magnetic circuit includes a ring-shaped central magnet, which is arranged around the through hole.

[0014] In some embodiments, the number of the vibration systems is two, the two diaphragms are respectively arranged on both sides of the shell along the thickness direction, the two voice coils are connected to the two diaphragms one by one, one of the voice coils corresponds to the first magnetic gap, and the other voice coil corresponds to the second magnetic gap.

[0015] According to some embodiments of the present invention, the present invention provides a smart wearable device, which includes the sound-emitting unit described above.

[0016] In some embodiments, the smart wearable device is smart glasses, which include a frame and temples respectively arranged on both sides of the frame, the temples are provided with a receiving space and a main sound hole and at least one secondary sound hole connected to the receiving space, the sound unit is arranged in the receiving space, a main sound output channel is provided between the diaphragm and the main sound hole, the number of the air flow channels is equal to the number of the secondary sound holes and is arranged one-to-one, and a secondary sound output channel is provided between the air flow channel and the corresponding secondary sound hole.

[0017] In some embodiments, the number of the air flow channels and the number of the auxiliary sound holes are both two, and the two auxiliary sound holes are respectively arranged on the upper side and the lower side of the temple.

[0018] In the above solution, by providing a drainage surface on the side of at least one edge magnet facing the airflow path, specifically on one or both ends of the edge magnet, the cross-sectional area of ​​the airflow path from the interior to the exterior of the sound unit increases. This invention effectively increases the effective opening area of ​​the rear cavity, reduces air flow velocity, and improves sound quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0020] Figure 1 This is a schematic diagram of the decomposed structure of the sound unit according to an embodiment of the present invention; Figure 2 This is a schematic structural diagram of a sound-emitting unit according to an embodiment of the present invention; Figure 3 This is a schematic cross-sectional view of a sound-emitting unit according to an embodiment of the present invention; Figure 4 This is a partial structural diagram of the central magnetic circuit and side magnetic circuit of the sound-emitting unit according to an embodiment of the present invention; Figure 5 Structure diagram of side sub-magnet of sound production monomer of embodiment of the present application; Figure 6 Structure diagram of side sub-magnet of sound production monomer of embodiment of the present application; Figure 7 Another structure diagram of side sub-magnet of sound production monomer of embodiment of the present application; Figure 8 Still another structure diagram of side sub-magnet of sound production monomer of embodiment of the present application; Figure 9 Structure diagram of magnetic yoke of sound production monomer of embodiment of the present application; Figure 10 Structure diagram of side magnetic conducting plate of sound production monomer of embodiment of the present application; Figure 11 Structure diagram of magnetic yoke, side magnetic conducting plate and magnetic circuit system of sound production monomer of embodiment of the present application; Figure 12 Structure diagram of magnetic yoke, voice coil and side magnetic circuit of sound production monomer of embodiment of the present application; Figure 13 Structure diagram of another perspective of Figure 12 ; Figure 14 Partial structure diagram of temple of smart glasses of embodiment of the present application; Figure 15 Structure diagram of another perspective of Figure 14 ; Figure 16 Structure diagram of another perspective of Figure 14 ;

[0021] Explanation of reference numerals: 10, sound production monomer; 1, shell; 12, accommodating cavity; 2, magnetic circuit system; 21, center magnetic circuit; 211, center magnet; 212, center magnetic conducting plate; 22, side magnetic circuit; 221, side sub-magnet; 2211, inner side surface; 2212, outer side surface; 2213, side surface; 22131, flow guiding surface; 22132, straight surface; 22133, inclined surface; 22134, curved surface; 223, side magnetic conducting plate; 2231, second notch; 23, magnetic yoke; 231, center part; 2311, through hole; 232, side wall; 2321, opening; 233, bent part; 2331, first notch; 234, outer frame; 235, third notch; 3, vibration system; 31, voice coil; 32, diaphragm; 4, first magnetic gap; 5, second magnetic gap; 6, air flow channel; 20, temple; 201, accommodating space; 202, main sound production hole; 203, auxiliary sound production hole; 204, main sound outlet channel; 205, auxiliary sound outlet channel.

[0022] The objectives, functional characteristics and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0024] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0025] In addition, if the embodiments of the present application involve descriptions of “first”, “second”, etc., the descriptions of “first”, “second”, etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by “first”, “second” can explicitly or implicitly include at least one of the features. In addition, if “and / or” or “and / or” appears throughout the text, it means that the three parallel solutions are included, for example, “A and / or B” includes A solution, or B solution, or A and B solutions are satisfied at the same time. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of a person of ordinary skill in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope of the present application.

[0026] With the development of the market of portable consumer electronics, micro sound generating devices are widely used, and with the multi-functional and miniaturized design of portable terminal electronic products, users have higher and higher requirements for sound quality. Some loudspeakers have poor sound quality.

[0027] After careful research, the applicant found that existing speakers generally adopt a conventional five-magnetic circuit design, that is, a design of a central magnet and four side magnets surrounding the central magnet. With such a design, the effective opening area of ​​the rear cavity is small, and the airflow velocity in the rear cavity is large, which affects the texture of the sound and causes the speaker to have poor sound quality. It should be noted that the rear cavity described in this application is the cavity inside the speaker. Specifically, for example, when the number of diaphragms is two, it refers to the space formed between the two diaphragms, the magnetic circuit system and the shell. When the number of diaphragms is one, it can be considered to be the space formed by the side of the diaphragm facing the accommodating cavity of the speaker and the magnetic circuit system and the shell. Correspondingly, taking the smart wearable device as smart glasses as an example, the front cavity refers to the channel between the diaphragm and the main sound-emitting hole of the temple.

[0028] See also Figures 1 to 4 According to some embodiments of the present invention, a sound-emitting unit 10 is provided, comprising a shell 1, a magnetic circuit system 2 and a vibration system 3. A housing 12 is formed inside the shell 1, the magnetic circuit system 2 is located in the housing 12, the magnetic circuit system 2 comprises a central magnetic circuit 21 and a side magnetic circuit 22, the side magnetic circuit 22 comprises a plurality of side magnets 221 arranged around the periphery of the central magnetic circuit 21, an air flow channel 6 is formed between the end of each side magnet 221 and the inner wall surface of the shell 1, and the air flow in the housing 12 follows Figure 3 The direction indicated by the middle arrow C flows outward from the speaker 10. A guide surface 22131 is provided on at least one side magnet 221 on the side facing the airflow channel 6, so that the cross-sectional area of ​​the corresponding airflow channel 6 increases from the inside of the speaker 10 to the outside. The vibration system 3 includes a voice coil 31 and a diaphragm 32 connected to the voice coil 31. The central magnetic circuit 21 and the side magnetic circuit 22 are separated by a gap, and the voice coil 31 is at least partially disposed in the gap.

[0029] Take the example of a speaker as the sound-emitting unit 10. The housing 1 refers to the outer shell of the speaker. The magnetic circuit system 2 refers to the component used to provide the magnetic circuit, which is generally composed of a central magnetic circuit 21 and a side magnetic circuit 22 and is used to provide a magnetic field. The vibration system 3 refers to the component used to vibrate and produce 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 arranged in the gap between the central magnetic circuit 21 and the side magnetic circuit 22 and can vibrate back and forth under the action of the magnetic field. The vibration of the voice coil 31 drives the diaphragm 32 to vibrate and produce sound. The end of the side magnet 221 in this application refers to the end along the length direction of each side magnet 221 and on the side away from the center magnet 211. The number of ends here is generally two. Generally speaking, there are four edge magnets 221. At least one edge magnet 221 can refer to any one edge magnet 221, any two edge magnets 221, any three edge magnets 221, or even all four edge magnets 221 provided with drainage surfaces 22131. Of course, those skilled in the art will appreciate that the number of edge magnets 221 may vary for different types of speakers, and this application does not specifically limit the number of edge magnets 221. Generally speaking, due to the vibration of the diaphragm 32, the sound signal emitted from the speaker housing 12 flows out of the speaker through the airflow channel 6. A connecting channel is also provided on the housing 1 to facilitate airflow. This application provides a drainage surface 22131 on the side of at least one edge magnet 221 facing the airflow channel 6, specifically on one or both ends of the edge magnet 221. This increases the cross-sectional area of ​​the airflow channel 6 from the interior of the sounding unit 10 to the exterior, effectively increasing the effective opening area of ​​the rear cavity, reducing air flow velocity, and improving sound quality. It should be noted that the increasing trend here includes not only a gradual increase in the cross-sectional area, but also includes various situations in which the cross-sectional area first remains unchanged and then increases, or first increases and then remains unchanged, or first remains unchanged and then increases and then remains unchanged, or first increases and then remains unchanged and then increases. Those skilled in the art will understand that any embodiment in which the cross-sectional area increases from the inside to the outside of the sound unit 10 is within the scope of protection of this application.

[0030] See Figure 4 In some embodiments, the edge magnets 221 include two first edge magnets distributed on opposite sides of the central magnetic circuit 21 along a first direction, and two second edge magnets distributed on opposite sides of the central magnetic circuit 21 along a second direction, where the first direction is perpendicular to the second direction; at least one of the first edge magnets is provided with a diversion surface 22131; and / or, at least one of the second edge magnets is provided with a diversion surface 22131.

[0031] The first direction in this application may be the length direction of the sound unit 10, such as Figure 4As shown by the arrow X, the second direction may be the width direction of the sound-emitting monomer 10. Figure 4 As shown by the arrow Y. Of course, the first direction can also be the width direction of the sound unit 10, such as Figure 4 As shown by the arrow Y, the second direction is the length direction of the sound unit 10. Figure 4 As shown by arrow X. The first direction is perpendicular to the second direction, and the third direction can be the thickness direction of the sound unit 10, or the height direction, vertical direction or up and down direction, such as Figure 2 or Figure 3 As shown by the middle arrow Z, the two edge magnets 221 arranged along the first direction can be named first edge magnets, and the two edge magnets 221 distributed along the second direction can be named second edge magnets. At least one of the two first edge magnets and the two second edge magnets can be provided with a drainage surface 22131. The provision of the drainage surface 22131 can increase the cross-sectional area of ​​the airflow channel 6, which is equivalent to increasing the effective opening area of ​​the rear cavity, thereby reducing air flow velocity and improving sound quality.

[0032] Reference Figure 4 In some embodiments, the length of the edge magnet 221 having the drainage surface 22131 is shorter than the length of the central magnetic circuit 21. The central magnetic circuit 21 may include a central magnet 211. The length of the edge magnet 221 is shorter than the length of the central magnet 211. Designing the edge magnet 221 to be shorter facilitates the formation of the airflow channel 6, facilitating the flow of sound signals from the rear cavity.

[0033] See Figure 5 and Figure 6 In some embodiments, at least one edge magnet 221 has an inner side surface 2211 facing the central magnetic circuit 21, an outer side surface 2212 arranged opposite to the inner side surface 2211, and two side surfaces 2213 respectively connecting the inner side and the outer side. 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 edge magnet 221 with the drainage surface 22131 tends to decrease from the inner side surface 2211 to the outer side surface 2212.

[0034] Reference Figure 5 , Figure 5Here, 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, that is, in the second direction, as indicated by the upward direction of arrow Y, the length of the edge magnet 221 decreases from d2 to d1. The edge magnet 221 may include an inner side surface 2211 and an outer side surface 2212 disposed opposite each other. The outer side surface 2212 refers to the side facing the outside of the sound unit 10, or the side facing the inner wall of the housing 1. The inner side surface 2211 refers to the side facing the center magnetic circuit 21. If the center magnetic circuit 21 includes a center magnet 211, the inner side surface 2211 refers to the side facing the center magnet 211. The length of the inner side 2211 is greater than that of the outer side 2212, and the flow guide surface 22131 is positioned on the side surface 2213. This reduces the length of the side magnet 221, where the flow guide surface 22131 is located, from the inner side 2211 toward the outer side 2212, or from the interior to the exterior of the sound unit 10. This increases the cross-sectional area of ​​the corresponding airflow channel 6, which helps reduce air 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 above. The length here refers to the length of the side magnet 221, perpendicular to a line running from the center of the sound unit 10 to the center of the side magnet 221, within the XY plane (i.e., the plane formed by the first and second directions). It can also be considered the length of the long side of the side magnet 221.

[0035] Reference Figure 5 In some embodiments, the inner side surface 2211 and the outer side surface 2212 are arranged in parallel, and the line connecting the center of the inner side surface 2211 and the center of the outer side surface 2212 is defined as the symmetry axis. Each side surface 2213 is provided with a drainage surface 22131, and the two drainage surfaces 22131 are arranged axially symmetrically about the symmetry axis.

[0036] The inner side surface 2211 and the outer side surface 2212 are arranged in parallel, meaning that for the same edge magnet 221, the inner side surface 2211 and the outer side surface 2212 can both extend along the first direction or the second direction. In this embodiment, each edge side surface 2213 is provided with a diversion surface 22131, and the two diversion surfaces 22131 are symmetrically arranged about the axis of symmetry. This ensures that the airflow channels 6 on both sides of the edge magnet 221 are also identical. "Identical" here means that the cross-sectional areas at corresponding locations are the same. This allows airflow to flow evenly from each airflow channel 6, ensuring uniform sound production.

[0037] The specific forms of the side surfaces 2213 include at least the following embodiments: Reference Figure 6In (a), in 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, and the inclined surface 22133 is the drainage surface 22131.

[0038] The straight surface 22132 herein refers to a surface extending in the first or second direction. At the location of the straight surface 22132, the cross-sectional area of ​​the airflow channel 6 remains substantially unchanged. Specifically, if the edge magnets 221 provided with the diversion surfaces 22131 are distributed along the first direction on both sides of the central magnetic circuit 21, the straight surface 22132 also extends in the first direction. If the edge magnets 221 provided with the diversion surfaces 22131 are distributed along the second direction on both sides of the central magnetic circuit 21, the straight surface 22132 also extends in the second direction. The inclined surface 22133 refers to a surface arranged at a relative inclination, namely, the diversion surface 22131 in this embodiment. Inclined here can mean being neither parallel nor perpendicular to the first or second direction. Since the diversion surface 22131 is disposed facing the airflow channel 6, the cross-sectional area of ​​the airflow channel 6 corresponding to the diversion surface 22131 gradually increases from the interior to the exterior of the sound-generating body, resulting in an increasing cross-sectional area of ​​the airflow channel 6. It should be noted that the inclined surface 22133 here can be either a straight inclined surface or an inclined arc surface.

[0039] Reference Figure 6 In (b), 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, and the curved surface 22134 is the drainage surface 22131.

[0040] As in the previous embodiment, the straight surface 22132 here refers to a surface extending in the first direction or the second direction. At the location of the straight surface 22132, the cross-sectional area of ​​the airflow channel 6 remains substantially unchanged. Specifically, if the edge magnets 221 provided with the diversion surfaces 22131 are distributed along the first direction on both sides of the central magnetic circuit 21, the straight surface 22132 also extends in the first direction. If the edge magnets 221 provided with the diversion surfaces 22131 are distributed along the second direction on both sides of the central magnetic circuit 21, the straight surface 22132 also extends in the second direction. The curved surface 22134, namely the diversion surface 22131 in this embodiment, can be curved, with a curved cross-section. The curved surface 22134 is disposed facing the airflow channel 6. The undulation of the curved surface 22134 can cause the cross-sectional area of ​​the airflow channel 6 corresponding to the diversion surface 22131 to gradually increase from the interior to the exterior of the sound-generating body, thereby causing the cross-sectional area of ​​the airflow channel 6 to increase.

[0041] Reference Figure 7 In (c), in some embodiments, each side surface 2213 includes an inclined surface 22133 , and both sides of the inclined surface 22133 are respectively connected to the inner side surface 2211 and the outer side surface 2212 , and the inclined surface 22133 serves as a drainage surface 22131 .

[0042] In this embodiment, the side surface 2213 is an inclined surface 22133, and the drainage surface 22131 is also an inclined surface 22133, that is, the entire side surface 2213 is an inclined surface 22133. The inclined surface 22133 refers to a surface arranged at a relative inclination, where inclination can mean that it is neither parallel nor perpendicular to the first direction or the second direction. Since the drainage surface 22131 is arranged 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 of the sound-generating body to the outside, thereby gradually increasing the cross-sectional area of ​​the airflow channel 6.

[0043] Reference Figure 7 (d) and Figure 8 In (e), in some embodiments, each side surface 2213 includes a curved surface 22134 , and two sides of the curved surface 22134 are respectively connected to the inner side surface 2211 and the outer side surface 2212 , and the curved surface 22134 serves as a drainage surface 22131 .

[0044] In this embodiment, the side surface 2213 is a curved surface 22134, and the drainage surface 22131 is the curved surface 22134, that is, the entire side surface 2213 is a curved surface 22134. The curved surface 22134 can be a curved surface with a cross-sectional shape of Figure 7 The curve shown in (d) can also be a wavy surface 22134, and the cross-sectional shape is Figure 8As shown in (e), the curved surface 22134 is disposed facing the air flow channel 6. The fluctuation of the curved surface 22134 can gradually increase the cross-sectional area of ​​the air flow channel 6 corresponding to the guide surface 22131 in the direction from the inside to the outside of the sound-generating body, thereby gradually increasing the cross-sectional area of ​​the air flow channel 6.

[0045] Reference Figure 8 In (f), in some embodiments, each side surface 2213 includes an inclined surface 22133 and a curved surface 22134 connected to each other, and the drainage surface 22131 includes an inclined surface 22133 and a 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 inclined surface 22133 and a curved surface 22134 connected to each other, and the drainage surface 22131 includes an inclined surface 22133 and a 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.

[0046] In this embodiment, the side surface 2213 can be composed of an interconnected inclined surface 22133 and a curved surface 22134. The curved surface 22134 is arranged facing the air flow channel 6. Through the fluctuation of the curved surface 22134, the cross-sectional area of ​​the air flow channel 6 corresponding to the guide surface 22131 can gradually increase in the direction from the inside to the outside of the sound-emitting body. Similarly, through the setting of the inclined surface 22133, the inclination direction can be controlled, and the cross-sectional area of ​​the air flow channel 6 corresponding to the guide surface 22131 can gradually increase, which can also make the cross-sectional area of ​​the air flow channel 6 tend to increase. As for the specific connection relationship between the curved surface 22134 and the inclined surface 22133, the side of the inclined surface 22133 away from the curved surface 22134 can be 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 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.

[0047] In some embodiments, each side surface 2213 may further include a combination of an inclined surface 22133, a curved surface 22134, and a straight surface 22132. The number of any one of the inclined surface 22133, the curved surface 22134, and the straight surface 22132 is not limited to one. Those skilled in the art will appreciate that any implementation using a combination of the above embodiments is within the scope of protection of this application.

[0048] Reference Figure 9In some embodiments, the magnetic circuit system 2 includes a yoke 23, the yoke 23 including a rectangular central portion 231, two opposite sides of the central portion 231 are connected to side walls 232 that are bent and extended in the same direction, and a bent portion 233 that is bent and extended in the opposite direction from one end of the side wall 232 away from the central portion 231. The central magnetic circuit 21 is fixed to the central portion 231 and is spaced from the side wall 232 to form a first magnetic gap 4. Some of the multiple edge magnets 221 are fixed to the bent portion 233 and are spaced from the side wall 232 to form a second magnetic gap 5. The yoke 23 is provided with an opening 2321 corresponding to the airflow channel 6 and connected thereto.

[0049] Specifically, the sidewalls 232 extend vertically upward from two opposing sides of the center portion 231, and the bent portions 233 extend outward from the side of the sidewalls 232 away from the center portion 231 to form a bent portion 233. When there are two bent portions 233, two side magnets 221 are mounted on the bent portions 233. The yoke 23 also includes an outer frame 234, with the bent portion connected to the outer frame 234. The outer frame 234 also includes a mounting plate, on which the other two side magnets 221 are mounted. The yoke 23 is formed into a recessed groove. The central magnetic circuit 21 is mounted on the center portion 231, with a gap between it and the sidewalls 232 forming a first magnetic gap 4. The side magnetic circuits 22 are separated from the sidewalls 232 by a gap forming a second magnetic gap 5. When there are two voice coils 31, one voice coil 31 extends into the first magnetic gap 4, and the other voice coil 31 extends into the second magnetic gap 5. At the same time, to facilitate the outflow of airflow or sound pressure signals, an opening 2321 can be provided in the magnetic yoke 23 at a position corresponding to the airflow channel 6, so that the accommodating cavity 12 is connected to the airflow channel 6 through the opening 2321. The magnetic yoke 23 not only increases the magnetic field strength and provides mounting support for the central magnetic circuit 21 and the side magnetic circuit 22, but also forms a first magnetic gap 4 and a second magnetic gap 5 with the central magnetic circuit 21 and the side magnetic circuit 22, respectively, facilitating the simultaneous vibration of the two voice coils 31.

[0050] Reference Figure 9 and Figure 11 In some embodiments, the outer frame 234 is provided with a first notch 2331, which communicates with the accommodating chamber 12, or in other words, connects the accommodating chamber 12 with the atmospheric environment. The number of first notches 2331 can be one or more. One or more first notches 2331 can be provided on a side of an outer frame 234, or first notches 2331 can be provided on each side of multiple outer frames 234. The edge magnet 221 is provided in the bent portion 233, and the first notch 2331 communicates with the accommodating chamber 12, allowing airflow from the accommodating chamber 12 to flow out through the first notch 2331. This further increases the opening area of ​​the rear cavity, reduces air flow rate, and improves sound quality.

[0051] Reference Figure 10 and Figure 11 In some embodiments, the side magnetic circuit 22 further includes a side magnetic plate 223, which is disposed on a side of the side magnet 221 away from the bent portion 233. The side magnetic plate 223 is provided with a second notch 2231, which communicates with the accommodating chamber 12, or in other words, connects the accommodating chamber 12 to the atmosphere. The second notch 2231 is provided on the side magnetic plate 223, communicating with the accommodating chamber 12. This allows airflow from the accommodating chamber 12 to flow out through the second notch 2231, further increasing the opening area of ​​the rear chamber, reducing air flow velocity, and improving sound quality. The number of second notches 2231 can be one or more. One or more second notches 2231 can be provided on a single side of the side magnetic plate 223, or on multiple sides. The first notch 2331 and the second notch 2231 can be aligned in height, or staggered as needed.

[0052] Reference Figure 9 and Figure 11 In some embodiments, a third notch 235 may be provided on the outer frame 234. The third notch 235 is provided on opposite sides of the outer frame 234 along the second direction, and the first notch 2331 is provided on opposite sides of the outer frame 234 along the first direction. The third notch 235 communicates with the accommodating chamber 12, allowing airflow from the accommodating chamber 12 to flow out through the third notch 235. This further increases the opening area of ​​the rear chamber, reduces air flow velocity, and improves sound quality. Furthermore, the central magnetic circuit 21 also includes a central magnetic plate 212, which is provided on the side of the central magnet 211 away from the central portion 231. The magnetic plate (including the central magnetic plate 212 and the side magnetic plates 223) is typically made of ferromagnetic material and effectively guides and enhances the magnetic field generated by the magnetic circuit. As part of the magnetic circuit, the magnetic plate can reduce magnetic field leakage, allowing more magnetic lines of force to pass through the voice coil 31, thereby improving energy utilization efficiency. Furthermore, the magnetic plate can concentrate the magnetic field, reducing distortion caused by improper magnetic circuit design and improving the sound quality of the speaker.

[0053] In some embodiments, a through hole 2311 is defined in the central region of the central portion 231. The central magnetic circuit 21 includes a ring-shaped central magnet 211 disposed around the periphery of the through hole 2311. The central magnet 211 also has a through hole, which can be coaxial with the through hole 2311 and larger than the through hole 2311. The ring-shaped central magnet 211 reduces weight and facilitates forming a magnetic field with the four peripheral magnets 221.

[0054] Reference Figure 12 andFigure 13 In some embodiments, the number of the vibration system 3 is two, and the two diaphragms 32 are respectively arranged on both sides of the shell 1 along the thickness direction. The two voice coils 31 are connected to the two diaphragms 32 in a one-to-one correspondence, wherein one voice coil 31 is arranged corresponding to the first magnetic gap 4, and the other voice coil 31 is arranged corresponding to the second magnetic gap 5. In this embodiment, the sound-emitting unit 10 is a double-sided sound-emitting unit 10 having two diaphragms 32. The two diaphragms 32 are arranged on both sides of the shell 1 along the thickness direction of the shell 1. The thickness direction of this application is also the vertical direction or the up-down direction, which can also be said to be the height direction, such as Figure 2 As shown by the arrow Z, there are two voice coils 31 , which are connected to two diaphragms 32 in a one-to-one correspondence. One voice coil 31 is arranged corresponding to the first magnetic gap 4 , which can drive the two voice coils 31 to vibrate and realize double-sided sound generation.

[0055] According to some embodiments of the present invention, a smart wearable device is provided, comprising the aforementioned sound-emitting unit 10. The smart wearable device herein may be smart glasses, such as virtual reality glasses, augmented reality glasses, or mixed reality glasses, or may be a watch, ring, bracelet, or the like, or may be a tablet, laptop, or iPad. Since the smart wearable device incorporates all of the technical solutions of all of the aforementioned embodiments, it at least possesses all of the beneficial effects brought about by all of the aforementioned technical solutions, and therefore will not be further elaborated upon herein.

[0056] In some embodiments, the smart wearable device is smart glasses, which include a frame and temples 20 respectively arranged on both sides of the frame. The temples 20 are provided with a receiving space 201 and a main sound hole 202 and at least one secondary sound hole 203 connected to the receiving space 201. The sound unit 10 is arranged in the receiving space 201, and a main sound output channel 204 is arranged between the diaphragm 32 and the main sound hole 202. The number of air flow channels 6 is equal to the number of secondary sound holes 203 and is arranged one-to-one. A secondary sound output channel 205 is arranged between the air flow channel 6 and the corresponding secondary sound hole 203.

[0057] Smart glasses can be virtual reality glasses, augmented reality glasses, or mixed reality glasses. Both the main sound-emitting hole 202 and the auxiliary sound-emitting hole 203 are provided on the outer shell of the temple 20. The outer shell forms a receiving space 201. The receiving space 201 is connected to the airflow channel 6 via a connecting channel on the outer shell. This allows airflow within the receiving cavity 12 to pass through the airflow channel 6, the connecting channel, the auxiliary sound-emitting channel 205, and finally be emitted from the auxiliary sound-emitting hole 203.

[0058] Specifically, refer to Figure 14 and Figure 15The main sound hole 202 is generally set near the frame. When the smart glasses are worn on the human head, the main sound hole 202 is set close to the ear. A main sound output channel 204 is also formed between the diaphragm 32 and the main sound output channel 202 in the accommodation space 201. The sound emitted by the vibration of the diaphragm 32 is emitted from the main sound output channel 204 from the main sound output channel 202. The human ear can receive the sound signal and realize sound pickup. In a further embodiment, for the sound unit 10 with a double-sided diaphragm 32, the sound emitted by the two diaphragms 32 will be emitted from the main sound output channel 204 from the main sound output channel 204. The sound output path is as follows: Figure 15 As shown in D. An air flow channel 6 is connected to a corresponding secondary sound hole 203 through a corresponding secondary sound outlet channel 205, and the three can be designed in a one-to-one correspondence. Specifically, the secondary sound hole 203 can be set on the side of the main sound hole 202 away from the frame, so as to reduce the impact of the sound signal emitted by the secondary sound hole 203 on the normal sound pickup of the user's ear. For the person next to the wearer, since the sound waves radiated outward from the rear sound cavity are emitted from the secondary sound hole 203, and the sound waves radiated outward from the front sound cavity are emitted from the main sound hole 202, the phases of the two sound waves are opposite, and the sound waves can cancel each other out, making it difficult for the person next to the wearer to receive the sound, which can protect the user's privacy and reduce the risk of information leakage.

[0059] In some embodiments, the number of airflow channels 6 and the number of auxiliary sound holes 203 are both two, and the two auxiliary sound holes 203 are respectively provided on the upper and lower sides of the temple. The two auxiliary sound holes 203 are respectively provided on the upper and lower sides of the temple 20, and the number of airflow channels 6 is two, and the two airflow channels 6 are provided in a one-to-one correspondence with the two auxiliary sound holes 203.

[0060] Reference Figure 16 The sound-emitting monomer 10 is provided with two air flow channels 6, each air flow channel 6 corresponds to a secondary sound hole 203. According to the placement direction of the sound-emitting monomer 10, the two secondary sound holes 203 can be respectively provided on the upper and lower sides of the temple 20. The secondary sound holes 203 are spaced apart from the main sound hole 202. A secondary sound outlet channel 205 connecting the air flow channel 6 and the secondary sound hole 203 is also formed in the accommodating space 201. The sound outlet path is as follows: Figure 16 As shown in E in the middle, by radiating sound waves with opposite phases 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.

[0061] The above are merely exemplary embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's description and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A sound-emitting unit, characterized in that: include: a housing, wherein a receiving cavity is formed inside the housing; A magnetic circuit system, the magnetic circuit system is located in the accommodating cavity, the magnetic circuit system includes a central magnetic circuit and a side magnetic circuit, the side magnetic circuit includes a plurality of side magnets arranged around the periphery of the central magnetic circuit, an air flow channel is formed between the end of each side magnet and the inner wall surface of the shell, and a drainage surface is provided on a side of at least one side magnet facing the air flow channel, so that the cross-sectional area of ​​the corresponding air flow channel tends to increase from the inside to the outside of the sound unit; A vibration system includes a voice coil and a diaphragm connected to the voice coil, wherein the central magnetic circuit and the side magnetic circuit are spaced apart and form a gap, and the voice coil is at least partially arranged in the gap.

2. The sound-emitting unit according to claim 1, wherein: The edge magnets include two first edge magnets distributed on opposite sides of the central magnetic circuit along a first direction, and two second edge magnets distributed on opposite sides of the central magnetic circuit along a second direction, wherein the first direction is perpendicular to the second direction; At least one of the first side magnets is provided with the drainage surface; and / or, The drainage surface is provided on at least one of the second side magnets.

3. The sound-emitting unit according to claim 1, characterized in that: At least one of the edge magnets has an inner side surface facing the central magnetic circuit, an outer side surface arranged opposite to the inner side surface, and two side surfaces respectively connecting the inner side and the outer side, the length of the inner side surface is greater than the length of the outer side surface, and at least one of the side surfaces is formed with the drainage surface, and the length of the edge magnet with the drainage surface tends to decrease in the direction from the inner side surface to the outer side surface.

4. The sound-emitting unit according to claim 3, characterized in that: 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, the side of the inclined surface away from the straight surface is connected to the outer side surface, and the inclined surface is the drainage surface; or Each of the side surfaces includes 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 drainage surface.

5. The sound-emitting unit according to claim 3, characterized in that: Each of the side surfaces includes an inclined surface, both sides of the inclined surface are connected to the inner side surface and the outer side surface respectively, and the inclined surface serves as the drainage surface; or, Each of the side surfaces includes a curved surface, both sides of the curved surface are respectively connected to the inner side surface and the outer side surface, and the curved surface is the drainage surface.

6. The sound-emitting unit according to claim 3, characterized in that: Each of the side surfaces includes an inclined surface and a curved surface connected to each other, and the drainage surface includes the inclined surface and the curved surface; The side of the inclined surface away from the curved surface is connected to the inner side surface, and the side of the curved surface away from the inclined surface is connected to the outer side surface; or, A side of the curved surface away from the inclined surface is connected to the inner side surface, and a side of the inclined surface away from the curved surface is connected to the outer side surface.

7. The sound-emitting unit according to any one of claims 3 to 6, characterized in that: The inner side surface and the outer side surface are arranged in parallel, and the line connecting the center of the inner side surface and the center of the outer side surface is defined as the symmetry axis. Each of the side surfaces is provided with the drainage surface, and the two drainage surfaces are arranged in axisymmetric relation to the symmetry axis.

8. The sound-emitting unit according to any one of claims 3 to 6, characterized in that: The length of the edge magnet having the diversion surface is smaller than the length of the central magnetic circuit.

9. The sound-emitting unit according to any one of claims 1 to 6, characterized in that: The magnetic circuit system includes a magnetic yoke, which includes a rectangular central portion, two opposite sides of the central portion, both of which are connected to side walls bent and extended in the same direction, and a bent portion bent and extended in the opposite direction from one end of the side wall away from the central portion. The central magnetic circuit is fixed to the central portion and is separated from the side wall to form a first magnetic gap, and some of the multiple side magnets are fixed to the bent portion and are separated from the side wall to form a second magnetic gap.

10. The sound-emitting unit according to claim 9, characterized in that: A through hole is provided in the central area of ​​the central portion, and the central magnetic circuit includes a ring-shaped central magnet, which is arranged around the periphery of the through hole.

11. The sound-emitting unit according to any one of claims 1 to 6, characterized in that: There are two vibration systems, the two diaphragms are respectively arranged on both sides of the shell along the thickness direction, the two voice coils are connected to the two diaphragms in a one-to-one correspondence, one of the voice coils is arranged corresponding to the first magnetic gap, and the other voice coil is arranged corresponding to the second magnetic gap.

12. A smart wearable device, characterized in that: The smart wearable device includes the sound-emitting unit according to any one of claims 1 to 11.

13. The smart wearable device according to claim 12, wherein: The smart wearable device is smart glasses, which include a frame and temples respectively arranged on both sides of the frame, the temples are provided with a receiving space and a main sound hole and at least one secondary sound hole connected to the receiving space, the sound unit is arranged in the receiving space, a main sound output channel is provided between the diaphragm and the main sound hole, the number of the air flow channels is equal to the number of the secondary sound holes and is arranged in a one-to-one correspondence, and a secondary sound output channel is provided between the air flow channel and the corresponding secondary sound hole.

14. The smart wearable device according to claim 13, wherein: The number of the air flow channels and the number of the auxiliary sound holes are both two, and the two auxiliary sound holes are respectively arranged on the upper side and the lower side of the temple.

Images