Vibration transmission sheet, bone conduction loudspeaker assembly, and earphone

Abstract

This application primarily relates to a vibrating plate, a bone conduction speaker assembly, and headphones. The vibrating plate includes an inner ring, an outer ring, and a connecting rod connecting the inner and outer rings. The connecting rod includes a connecting rod body, a first connecting portion, and a second connecting portion. One end of the connecting rod body is connected to the inner ring via the first connecting portion. The vibrating plate has intersecting major and minor axes, with the dimension along the major axis being larger than the dimension along the minor axis. The vibrating plate has a first reference point located at the connection between the first connecting portion and the connecting rod body, a second reference point located at the connection between the second connecting portion and the connecting rod body, and a first reference line defined by the first and second reference points. The connecting rod body is divided by the first reference line into a first portion and a second portion located on both sides of the first reference line, with the area ratio of the first portion and the second portion being between 0.8 and 1.2. Through the above configuration, this application can reduce air conduction noise generated by the vibrating plate and improve the sound output effect of the bone conduction speaker assembly.

Description

Technical Field

[0001] This application relates to the field of acoustic technology, and in particular to transducers, bone conduction amplifiers, and headphones. Background Technology

[0002] With the increasing popularity of electronic devices, they have become indispensable social and entertainment tools in people's daily lives, and people's demands for electronic devices are also getting higher and higher. Electronic devices such as headphones are also widely used in people's daily lives. They can be used in conjunction with terminal devices such as mobile phones and computers to provide users with an auditory feast.

[0003] Bone conduction speaker components convert sound into mechanical vibrations of different frequencies, transmitting sound waves through the skull, bony labyrinth, inner ear fluid, cochlea, and auditory center. Bone conduction speaker components typically contain a transducer plate that supports the transducer. However, the transducer plate itself vibrates in the air while supporting the transducer, generating air conduction noise that can affect the sound output of the bone conduction speaker component. Summary of the Invention

[0004] This application provides a vibrating plate, a bone conduction speaker assembly, and headphones, which can reduce air conduction noise generated by the vibrating plate and improve the sound output effect of the bone conduction speaker assembly.

[0005] In a first aspect, one technical solution adopted in this application is to provide a vibration transducer, which includes an inner ring, an outer ring, and a plurality of connecting rods connecting the inner ring and the outer ring. Each connecting rod includes a connecting rod body, a first connecting part, and a second connecting part. One end of the connecting rod body is connected to the inner ring via the first connecting part, which is gradually widened in the direction close to the inner ring. The other end of the connecting rod body is connected to the outer ring via the second connecting part, which is also gradually widened in the direction close to the outer ring. When viewed along the axial direction of the vibration transducer, the vibration transducer has a major axis and a minor axis that intersect each other. The dimension of the vibration transducer along the major axis is larger than the dimension along the minor axis. The vibration transducer also has a first reference point located at the connection between the first connecting part and the connecting rod body, a second reference point located at the connection between the second connecting part and the connecting rod body, and a first reference line defined by the first reference point and the second reference point. The connecting rod body is divided into a first part and a second part located on both sides of the first reference line by the first reference line. The area ratio of the first part and the second part is between 0.8 and 1.2.

[0006] In some embodiments, the area ratio of the first portion and the second portion is between 0.9 and 1.1.

[0007] In some embodiments, the connecting rod body has a first body edge and a second body edge disposed opposite to each other, the first connecting portion has a first transition edge connecting the first body edge and the outer ring edge of the inner ring portion, the second connecting portion has a second transition edge connecting the second body edge and the inner ring edge of the outer ring portion, the first transition edge and the second transition edge are respectively disposed in a concave arc, the first reference point is the connection point between the first transition edge and the first body edge, the second reference point is the connection point between the second transition edge and the second body edge, and the remaining intersection points of the first reference line with the first body edge and the second body edge are located between the first reference point and the second reference point.

[0008] In some embodiments, the connecting body includes a plurality of straight rods arranged side by side and spaced apart from each other, and a plurality of bent rods that connect the plurality of straight rods sequentially. The vibration transducer also has a second reference line that passes through the midpoint of the line connecting the first reference point and the second reference point and intersects with the first reference line. The second reference line is located between two adjacent straight rods and is parallel to each other. The connecting rod body is divided into a third part and a fourth part located on both sides of the second reference line by the second reference line. The area ratio of the third part and the fourth part is between 0.8 and 1.2.

[0009] In some embodiments, the connecting rod body has a first body edge and a second body edge disposed opposite to each other. The first body edge includes a first straight edge located in the straight rod portion and a first curved edge located in the bent rod portion. The second body edge includes a second straight edge located in the straight rod portion and a second curved edge located in the bent rod portion. The first straight edge and the second straight edge of the same straight rod portion are parallel to each other. The first straight edge is tangent to the first curved edge connected to it, and the second straight edge is tangent to the second curved edge connected to it. The first curved edge and the second curved edge of the same bent rod portion are arranged in a circular arc shape with the same center.

[0010] In some embodiments, the area ratio of the third and fourth portions is between 0.9 and 1.1.

[0011] In some embodiments, the number of bent rods on both sides of the first reference line is the same.

[0012] In some embodiments, the angle between the second reference line and the first reference line is between 80° and 100°.

[0013] In some embodiments, the transducer also includes a liner that is fixedly attached to the inner ring, the outer ring, and the plurality of connecting rods.

[0014] In some embodiments, the number of bent rods on both sides of the first reference line is between 3 and 8.

[0015] In some embodiments, the lengths of the plurality of straight rods are configured to increase in a direction close to the second reference line.

[0016] In some embodiments, the inner ring portion and / or the outer ring portion are provided with wiring holes, and the transducer also has a third reference line and a fourth reference line. The third reference line and the fourth reference line pass through the center of the inner ring portion and intersect with the outer ring portion respectively, thereby defining a wiring area. The wiring holes are located within the wiring area, and the connecting rod is located outside the wiring area. The angle between the third reference line and the fourth reference line used to define the wiring area is between 30° and 50°.

[0017] Secondly, one technical solution adopted in this application is to provide a bone conduction speaker assembly, which includes a housing, a transducer, and a vibration plate as described in the above embodiments. The vibration plate is used to connect the transducer and the housing, and to suspend the transducer on the housing.

[0018] Secondly, one technical solution adopted in this application is to provide an earphone that includes the bone conduction speaker assembly as described in the above embodiments.

[0019] The beneficial effects of this application are as follows: Unlike the prior art, the vibration transducer of this application is provided with an inner ring, an outer ring, and multiple connecting rods connecting the inner and outer rings. One end of each connecting rod is connected to the inner ring, and the other end is connected to the outer ring via a second connecting part. The connection points between the connecting rod and the inner ring and between the connecting rod and the outer ring define a first reference line. This first reference line divides the connecting rod body into a first part and a second part, where the area ratio of the first part to the second part is between 0.8 and 1.2. This configuration allows the areas of the first and second parts to be identical or nearly identical. When the first and second parts, with similar areas, undergo deformation in opposite directions under the Nth mode of the vibration transducer, the air conduction noise generated by the first and second parts can cancel each other out. This reduces the air conduction noise of the connecting rod body, thereby improving the sound output of the bone conduction speaker assembly and enhancing the sound quality of the headphones. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the headphones provided in this application;

[0021] Figure 2 yes Figure 2 The diagram shown is an exploded view of the headphone embodiment.

[0022] Figure 3 yes Figure 2 A three-dimensional structural schematic diagram of the bone conduction speaker assembly in the illustrated headphone embodiment;

[0023] Figure 4 yes Figure 3 The illustrated embodiment of the bone conduction speaker assembly is shown as a cross-sectional structural diagram along section line AA.

[0024] Figure 5 yes Figure 3 An exploded structural diagram of an embodiment of the bone conduction speaker assembly is shown.

[0025] Figure 6 yes Figure 5 A schematic diagram of the overall structure of the vibration plate in the bone conduction speaker assembly embodiment shown;

[0026] Figure 7 yes Figure 6 The diagram shown is a scaled-up view of region O in the embodiment of the vibration transmission plate.

[0027] Figure 8 This is a side view structural diagram of the vibrating plate in the Nth mode in the headphone embodiment;

[0028] Figure 9 This is a schematic diagram of the other side of the structure of the vibration plate in the headphone embodiment under the Nth mode;

[0029] Figure 10 This is a side view structural diagram of the vibration plate in the N+1th mode in the headphone embodiment;

[0030] Figure 11 This is a partial structural diagram of the vibration transmission plate in the headphone embodiment under the N+1th mode on the other side;

[0031] Figure 12 yes Figure 3 Another exploded view of an embodiment of the bone conduction speaker assembly shown;

[0032] Figure 13 yes Figure 3 Another exploded structural diagram of an embodiment of the bone conduction speaker assembly shown;

[0033] Figure 14 This is a side view structural diagram of the vibration plate in the N+2th mode in the headphone embodiment;

[0034] Figure 15 This is a schematic diagram of the structure of the transducer in the headphone embodiment in the N+2th mode, on the other side. Detailed Implementation

[0035] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be noted that the following embodiments are for illustrative purposes only and do not limit the scope of the application. Similarly, the following embodiments are only some, not all, embodiments of the present application, and all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present application.

[0036] The reference to "embodiment" in this application means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0037] The following is an exemplary description of the headphones in the example embodiment.

[0038] like Figure 1 As shown, the earphone 1 is an audio converter capable of receiving electrical signals from a media player or receiver, converting the electrical signals into bone conduction sound, and transmitting the bone conduction sound to the user. In other embodiments, the earphone 1 can also simultaneously convert the electrical signals into air conduction sound (sound waves audible to the user) and transmit the air conduction sound to the user. In some embodiments, the earphone 1 can be an open-back earphone, such as an ear-hook earphone, a behind-the-ear earphone, or a clip-on earphone.

[0039] like Figure 2 As shown, the headphones 1 may include a bone conduction speaker assembly 10, which can be placed on the facial area in front of the tragus of the user's left and / or right ear and fit snugly against the user's face. The bone conduction speaker assembly 10 is used to convert electrical signals containing relevant audio information into bone conduction sound, and further transmit the bone conduction sound to the user.

[0040] In some embodiments, such as Figures 3 to 5 As shown, the bone conduction speaker assembly 10 may include a housing 100, a transducer 200, and a vibration transducer 300. The vibration transducer 300 can be used to connect the transducer 200 and the housing 100, and to suspend the transducer 200 on the housing 100.

[0041] Among them, the transducer 200 is the main device in the bone conduction speaker assembly 10 used to convert electrical signals into bone conduction sound.

[0042] In some embodiments, such as Figure 4 As shown, the transducer 200 may include a voice coil 210, a bracket 220, a magnetic circuit system 230, and a connecting transducer 240. The connecting transducer 240 connects the bracket 220 and the magnetic circuit system 230, so that the magnetic circuit system 230 is elastically suspended on the periphery of the bracket 220. The voice coil 210 is disposed on the bracket 220 and cooperates with the magnetic circuit system 230. Specifically, when the voice coil 210 is connected to an electrical signal containing relevant audio information, the magnetic circuit system 230 can drive the voice coil 210 and the bracket 220 to vibrate together.

[0043] The voice coil 210 can receive an electrical signal containing relevant audio information, and the support 220 can be disposed inside the magnetic circuit system 230. The voice coil 210 can be wound and fixed to the support 220 along its radial direction. The voice coil 210 corresponds to the magnetic circuit system 230 so that the electric field of the voice coil 210 when receiving an electrical signal containing relevant audio information can interact with the magnetic field of the magnetic circuit system 230. It is understood that the radial direction of the support 220 can be perpendicular to the vibration direction of the support 220, and the vibration direction of the support 220 is the axial direction of the transducer 200. As an example, the axial direction of the transducer 200 can be as follows: Figure 4 As shown by arrow B, the radial direction of bracket 220 can be as follows: Figure 4 As indicated by the middle arrow C.

[0044] Specifically, since the voice coil 210 is opposite to the magnetic circuit system 230 in the radial direction C of the transducer 200, the electric field of the voice coil 210 and the magnetic field of the magnetic circuit system 230 can interact, thereby generating an electromagnetic reaction. This causes the magnetic circuit system 230 and the support 220 on which the voice coil 210 is mounted to move relative to each other, so that the transducer 200 vibrates and generates bone conduction sound that can transmit relevant audio information.

[0045] The connecting transducer 240 can undergo a certain elastic deformation under the action of external force, and can return to its original shape after the external force is removed. Since the connecting transducer 240 connects the support 220 and the magnetic circuit system 230 respectively, when the magnetic circuit system 230 and the voice coil 210 move relative to each other, the magnetic circuit system 230 and the support 220 on which the voice coil 210 is located also move relative to each other. At the same time, the connecting transducer 240 can elastically constrain the magnetic circuit system 230 and the support 220 on which the voice coil 210 is located, so as to confine the support 220 within the magnetic circuit system 230, thereby ensuring the stable operation of the transducer 200.

[0046] The transducer 300 can be connected to the bracket 220 in the transducer 200 for fixation, and can also be connected to the housing 100 to suspend the transducer 200 within the space inside the housing 100. When the transducer 200 vibrates, it causes the transducer 300 to undergo elastic deformation, thereby transmitting bone conduction sound to the user. The transducer 300 can also further constrain the transducer 200 and dampen its vibration, ensuring that the transducer 200 remains within the housing 100 without detaching from it, thus making the structure of the earphone 1 more reliable and stable.

[0047] In some embodiments, the vibration transducer 300 may be made of a metallic material, which may include, but is not limited to, steel (e.g., stainless steel, carbon steel, etc.) and lightweight alloys (e.g., aluminum alloys, beryllium copper, magnesium alloys, titanium alloys, etc.). In some embodiments, the vibration transducer 300 may also be made of other single or composite materials that can achieve the same performance. For example, composite materials may include, but are not limited to, reinforcing materials such as glass fiber, carbon fiber, boron fiber, graphite fiber, silicon carbide fiber, or aramid fiber.

[0048] In some embodiments, such as Figure 6 as well as Figure 7 As shown, the transducer 300 may include an inner ring portion 310, an outer ring portion 320, and a plurality of connecting rods 330 connecting the inner ring portion 310 and the outer ring portion 320. The inner ring portion 310 can be connected to the transducer 200, the outer ring portion 320 is connected to the housing 100, and the plurality of connecting rods 330 connect the inner ring portion 310 and the outer ring portion 320, thereby suspending the transducer 200 inside the housing 100. Therefore, when the transducer 200 vibrates relative to the housing 100, the plurality of connecting rods 330 will undergo significant deformation.

[0049] The connecting rod 330 may include a connecting rod body 331, a first connecting portion 332, and a second connecting portion 333. One end of the connecting rod body 331 is connected to the inner ring portion 310 via the first connecting portion 332, which is gradually widening in the direction approaching the inner ring portion 310. The other end of the connecting rod body 331 is connected to the outer ring portion 320 via the second connecting portion 333, which is gradually widening in the direction approaching the outer ring portion 320.

[0050] By configuring the first connecting portion 332 to gradually widen in the direction close to the inner ring portion 310, and configuring the second connecting portion 333 to gradually widen in the direction close to the outer ring portion 320, the connection strength between the connecting rod 330 and the inner ring portion 310 and the outer ring portion 320 can be improved. This reduces the occurrence of breakage of the first connecting portion 332 and the second connecting portion 333 when the connecting rod 330 is deformed, thereby improving the structural strength of the vibration transducer 300.

[0051] When viewed along the axial direction B of the vibration transducer 300, the vibration transducer 300 has a major axis and a minor axis that intersect each other, and the dimension of the vibration transducer 300 along the major axis is larger than the dimension along the minor axis. As an example, the dimension of the vibration transducer 300 along the major axis can be as follows: Figure 6 As shown in the medium length L1, the dimensions of the transducer 300 along its minor axis can be as follows: Figure 6 As shown in the medium length L2. When viewed along the axial direction B of the transducer 200, the transducer 300 as a whole presents a racetrack-shaped or elliptical shape.

[0052] The vibration transducer 300 also has a first reference point located at the connection between the first connecting portion 332 and the connecting rod body 331, a second reference point located at the connection between the second connecting portion 333 and the connecting rod body 331, and a first reference line defined by the first and second reference points. As an example, the first reference point may be as follows: Figure 7 As shown by midpoint D, the second reference point can be as follows: Figure 7 As shown at midpoint E, the first reference line can be as follows: Figure 7 The midline segment ED is shown.

[0053] The connecting rod body 331 is divided into a first part 3311 and a second part 3312 located on both sides of the first reference line ED. The area ratio of the first part 3311 and the second part 3312 can be between 0.8 and 1.2. As an example, the area ratio of the first part 3311 and the second part 3312 can be 0.8, 0.85, 0.88, 0.92, 0.95, 0.97, 1, and 1.2.

[0054] As the transducer 200 vibrates, it drives the vibrating plate 300 to move, causing the connecting rod 330 within the vibrating plate 300 to deform. During this deformation, the connecting rod 330 generates airborne noise, which affects the sound output of the bone conduction speaker assembly 10 and reduces the sound quality of the headphones 1. This airborne noise refers to the sound produced when the transducer 200 vibrates, causing the connecting rod 330 to vibrate and resulting in non-ideal oscillations (ideally, this would be transmission or damping). This airborne noise is distinct from the vibration of the bone conduction sound from the transducer 200; it is airborne sound. Furthermore, this airborne noise is transmitted through the openings in the housing 100, interfering with the sound output of the bone conduction speaker assembly 10 and thus affecting the sound output of the headphones 1.

[0055] The earphone 1 vibrates and produces sound in the audible frequency range of the human ear, such as between 500Hz and 12000Hz. The vibration of the bone conduction speaker component 10 will cause the vibration deformation of the transducer 300. In the example frequency range, there may be certain specific frequency bands that cause the transducer 300 itself to deform drastically, producing non-ideal noise, and may also lead to the structural failure of the bone conduction speaker component 10. The inventors have found at least three specific frequency bands where the vibration modes of the transducer 300 may have the above problems. The following analysis and explanation of the significance of the structural improvement are based on the Nth, N+1th and N+2th modes.

[0056] During the deformation of the connecting rod body 331, there will be an Nth mode. In this Nth mode, the first part 3311 and the second part 3312 of the connecting rod body 331 will move relative to each other in opposite directions. For example, the Nth mode of the connecting rod body 331 can be as follows: Figure 8 and Figure 9 The modes shown or similar Figure 8 as well as Figure 9 The modes shown, for example, the first part 3311 moves to one side along the axis B of the transducer 200, and the second part 3312 moves to the other side along the axis B of the transducer 200.

[0057] Therefore, by setting the area ratio of the first part 3311 and the second part 3312 to between 0.8 and 1.2, the areas of the first part 3311 and the second part 3312 are the same or nearly the same. This allows the air conduction noise generated by the first part 3311 and the second part 3312, which have similar mass and volume, to cancel each other out when they deform in opposite directions in the Nth mode. This reduces the air conduction noise of the connecting rod body 331, thereby improving the sound output of the bone conduction speaker assembly 10 and enhancing the sound quality of the headphones 1. Furthermore, by using the first reference line ED to distinguish the first part 3311 and the second part 3312, the distinction between the first part 3311 and the second part 3312 can be combined with the shape of the vibrating plate 300, resulting in a more reasonable distribution of the first part 3311 and the second part 3312.

[0058] If the area ratio of the first part 3311 and the second part 3312 is less than 0.8 or greater than 1.2, it means that the areas of the first part 3311 and the second part 3312 are too different. In the Nth mode of the connecting rod body 331, when the first part 3311 and the second part 3312 move in opposite directions, the air conduction noise generated by them is difficult to cancel each other out. Therefore, the connecting rod body 331 will still have a large noise in the Nth mode.

[0059] In some embodiments, the area ratio of the first portion 3311 and the second portion 3312 can be between 0.9 and 1.1. For example, the area ratio of the first portion 3311 and the second portion 3312 can be a value such as 0.9, 0.91, 0.96, 0.98, 1, or 1.1.

[0060] Setting the area ratio of the first part 3311 and the second part 3312 to between 0.9 and 1.1 makes the areas of the first part 3311 and the second part 3312 equal or closer to equal. This allows most of the air conduction noise generated by the first part 3311 and the second part 3312 in the Nth mode to cancel each other out, which is more conducive to reducing the air conduction noise generated by the connecting rod body 331, thereby further improving the sound output effect of the bone conduction speaker assembly 10 and enhancing the sound quality of the headphones 1.

[0061] In some embodiments, such as Figure 7As shown, the connecting rod body 331 has a first body edge 301 and a second body edge 302 disposed opposite to each other. The first connecting portion 332 has a first transition edge 3321 connecting the first body edge 301 and the outer ring edge 311 of the inner ring portion 310, and the second connecting portion 333 has a second transition edge 3331 connecting the second body edge 302 and the inner ring edge 321 of the outer ring portion 320. The first transition edge 3321 and the second transition edge 3331 are respectively arranged in a concave arc.

[0062] The concave arc setting refers to the fact that both the first transition edge 3321 and the second transition edge 3331 are concave towards the solid portion. The concave arc shape of the first transition edge 3321 and the second transition edge 3331 includes, but is not limited to, a circular arc shape, and can also be a curved shape with a continuously changing radius of curvature.

[0063] The first reference point D is the connection point between the first transition edge 3321 and the first main body edge 301, and the second reference point E is the connection point between the second transition edge 3331 and the second main body edge 302. The remaining intersections of the first reference line ED with the first main body edge 301 and the second main body edge 302 are located between the first reference point D and the second reference point E. By using the starting point of the gradual widening of the first connecting portion 332 and the second connecting portion 333 as the first reference point D and the second reference point E, and by setting the remaining intersections of the first reference line ED with the first main body edge 301 and the second main body edge 302 between the first reference point D and the second reference point E, it is more conducive to canceling the air conduction noise of the first part 3311 and the second part 3312, thereby further reducing the air conduction noise of the connecting rod body 331.

[0064] In some embodiments, such as Figure 7 As shown, the connecting rod body 331 may include a plurality of straight rod portions 3315 arranged side by side and spaced apart from each other, and a plurality of bent rod portions 3316 sequentially connecting the plurality of straight rod portions 3315. The vibration transducer 300 also has a second reference line that passes through the midpoint of the line connecting the first reference point D and the second reference point E and intersects the first reference line ED. The second reference line is located between two adjacent straight rod portions 3315 and is parallel to each other. The second reference line may be as follows: Figure 7 The midline segment FH is shown.

[0065] like Figure 7As shown, the main body 331 of the connecting rod is divided into a third part 3317 and a fourth part 3318 located on both sides of the second reference line FH. The area ratio of the third part 3317 and the fourth part 3318 can be between 0.8 and 1.2. As an example, the area ratio of the third part 3317 and the fourth part 3318 can be values ​​such as 0.8, 0.83, 0.85, 0.88, 0.92, 0.95, 0.97, 1, and 1.2.

[0066] Because there is an (N+1)th mode during the deformation of the connecting rod body 331, the third part 3317 and the fourth part 3318 of the connecting rod body 331 will move relative to each other in opposite directions in this (N+1)th mode, resulting in significant air-conducting noise. For example, the (N+1)th mode of the connecting rod body 331 can exhibit the following characteristics: Figure 10 and Figure 11 The modes shown or similar Figure 10 and Figure 11 The modes shown, for example, the third part 3317 moves to one side along the axis B of the transducer 200, and the fourth part 3318 moves to the other side along the axis B of the transducer 200.

[0067] Setting the area ratio of the third part 3317 and the fourth part 3318 to between 0.8 and 1.2 allows the areas of the third part 3317 and the fourth part 3318 to be consistent or nearly consistent. When the third part 3317 and the fourth part 3318 with similar areas deform in opposite directions in the N+1th mode, the air conduction noise generated by the two can cancel each other out, thereby reducing the air conduction noise of the connecting rod body 331, improving the sound output effect of the bone conduction speaker assembly 10, and enhancing the sound quality of the headphones 1.

[0068] In some embodiments, the area ratio of the third portion 3317 and the fourth portion 3318 can be between 0.9 and 1.1. For example, the area ratio of the third portion 3317 and the fourth portion 3318 can be a value such as 0.9, 0.91, 0.96, 0.98, 1, or 1.1.

[0069] Setting the area ratio of the third part 3317 and the fourth part 3318 to between 0.9 and 1.1 makes the areas of the third part 3317 and the fourth part 3318 equal or closer to equal. This allows most of the air conduction noise generated by the third part 3317 and the fourth part 3318 in the N+1th mode to cancel each other out, which is more conducive to reducing the air conduction noise generated by the connecting rod body 331, thereby further improving the sound output effect of the bone conduction speaker assembly 10 and enhancing the sound quality of the headphones 1.

[0070] In some embodiments, such as Figure 7 As shown, the connecting rod body 331 may have a first body edge 301 and a second body edge 302 disposed opposite to each other. The first body edge 301 includes a first straight edge 3011 located in the straight rod portion 3315 and a first curved edge 3012 located in the bent rod portion 3316, and the second body edge 302 includes a second straight edge 3021 located in the straight rod portion 3315 and a second curved edge 3022 located in the bent rod portion 3316.

[0071] The first straight edge 3011 and the second straight edge 3021 of the same straight rod portion 3315 are parallel to each other. The first straight edge 3011 is tangent to the connected first curved edge 3012, and the second straight edge 3021 is tangent to the connected second curved edge 3022. The first curved edge 3012 and the second curved edge 3022 of the same curved rod portion 3316 are arranged in a circular arc with the same center.

[0072] This configuration allows the width of the bent rod portion 3316 to be equal to or slightly larger than the width of the straight rod portion 3315. Furthermore, the first curved edge 3012 and the second curved edge 3022 of the same bent rod portion 3316 are arranged in a circular arc with the same center, which makes the structural strength of the connecting rod body 331 stronger and the structural strength of each part of the connecting rod body 331 more balanced, thereby reducing the possibility of the connecting rod body 331 breaking at any position when it deforms.

[0073] In some embodiments, the number of bent rod portions 3316 on both sides of the first reference line ED is the same. This arrangement can improve the structural consistency and balance between the first portion 3311 and the second portion 3312 on both sides of the first reference line ED, reduce the difference between the first portion 3311 and the second portion 3312, and thus make it easier for the air conduction noise of the first portion 3311 and the second portion 3312 to cancel each other out, thereby improving the sound output effect of the bone conduction speaker assembly 10.

[0074] In some embodiments, such as Figure 7 As shown, the angle between the second reference line FH and the first reference line ED is between 80° and 100°. For example, the angle between the second reference line FH and the first reference line ED can be as follows: Figure 7 As shown by the median angle α. For example, the angle between the second reference line FH and the first reference line ED can be 80°, 85°, 90°, 95° or 100°, etc.

[0075] Since the first reference line ED is determined based on the connection reference point between the connecting rod 330 and the inner ring 310 and the outer ring 320, and the second reference line FH is parallel to the two adjacent straight rod sections 3315, the straight rod section 3315 intersects with the first reference line ED. Moreover, the overall shape of the vibration transducer 300 is racetrack-shaped or elliptical. Therefore, if the angle between the second reference line FH and the first reference line ED is less than 80° or greater than 100°, the straight rod section 3315 and the bent rod section 3316 of the connecting rod 330 will be closer to the outer ring edge 311 of the inner ring section 310 and the inner ring edge 321 of the outer ring section 320. This will cause the connecting rod 330 to easily touch and interfere with the inner ring section 310 and the outer ring section 320 during vibration, which will result in greater noise from the connecting rod 330 and may also lead to breakage.

[0076] Therefore, setting the angle between the second reference line FH and the first reference line ED to between 80° and 100° will make the second reference line FH and the first reference line ED perpendicular or nearly perpendicular to each other, and the straight rod portion 3315 and the first reference line ED will also be perpendicular or nearly perpendicular to each other. This will cause the straight rod portion 3315 and the bent rod portion 3316 of the connecting rod 330 to move away from the outer ring edge 311 of the inner ring portion 310 and the inner ring edge 321 of the outer ring portion 320. This will reduce the contact and interference between the connecting rod 330 and the inner ring portion 310 and the outer ring portion 320, thereby reducing the noise generated by the connecting rod 330 and reducing the possibility of the connecting rod 330 breaking or being damaged due to deformation colliding with the inner ring portion 310 or the outer ring portion 320.

[0077] In some embodiments, such as Figure 7 As shown, the length of the plurality of straight rod portions 3315 can be set to increase along the direction close to the second reference line FH. In other words, the length direction of the straight rod portion 3315 can be parallel to the direction of the second reference line FH.

[0078] Since the second reference line FH is perpendicular or nearly perpendicular to the first reference line ED, the straight rod portion 3315 is also perpendicular or nearly perpendicular to the first reference line ED. The two ends of the first reference line ED are the inner ring portion 310 and the outer ring portion 320, while the bent rod portion 3316 is located at both ends of the straight rod portion 3315. Therefore, by increasing the length of multiple straight rod portions 3315 along the direction closer to the second reference line FH, the straight rod portions 3315 and the bent rod portions 3316 can be moved away from the outer ring edge 311 of the inner ring portion 310 and the inner ring edge 321 of the outer ring portion 320. This reduces the likelihood of the connecting rod body 331 contacting and interfering with the inner ring portion 310 and the outer ring portion 320, thereby reducing noise from the connecting rod 330 and reducing the likelihood of breakage or damage due to deformation colliding with the inner ring portion 310 or the outer ring portion 320.

[0079] In some embodiments, such as Figure 12 as well as Figure 13 As shown, the transducer 300 may further include a diaphragm 340 that is fitted and fixed to the inner ring portion 310, the outer ring portion 320, and the plurality of connecting rods 330. The diaphragm 340 may be used for waterproofing and dustproofing. In other embodiments, the diaphragm 340 may be configured as an air-conducting diaphragm, which can work in conjunction with the bone conduction speaker assembly 10 to generate low-frequency air-conducted sound.

[0080] By configuring the liner 340 to fit against the inner ring 310, the outer ring 320, and the multiple connecting rods 330, the liner 340 can further restrict the deformation of the connecting rods 330, thereby reducing the air conduction noise generated by the connecting rods 330.

[0081] In some embodiments, the liner 340 may be made of materials such as mesh, cotton sheet, or plastic sheet.

[0082] In some embodiments, the liner 340 may be disposed along the axial direction A of the transducer 200 on the side of the connecting rod 330 away from the transducer 200.

[0083] Because the connecting rod body 331 will exhibit an (N+2)th mode during deformation, in this (N+2)th mode, the connecting rod body 331 will deform along the axial direction B of the transducer 200. For example, the (N+2)th mode of the connecting rod body 331 can present as follows: Figure 14 and Figure 15 The modes shown or similar Figure 14 and Figure 15 The mode shown, for example, the entire link body 331 moves along the axis B of the transducer 200 in a direction away from the transducer 200.

[0084] When the connecting rod body 331 is about to enter the N+2th mode, the diaphragm 340 located on the side of the connecting rod 330 away from the transducer 200 can restrict and block the movement of the connecting rod body 331, thereby reducing the air conduction noise generated by the connecting rod body 331 and improving the sound quality of the headphones 1.

[0085] In some embodiments, the number of bent rod portions 3316 on both sides of the first reference line ED can be between 3 and 8. As an example, the number of bent rod portions 3316 on both sides of the first reference line ED can be 5, 6, 7 or 8, etc.

[0086] If the number of bent rod portions 3316 on both sides of the first reference line ED is less than 3, the connecting rod body 331 will experience a large displacement amplitude swing in the N+2 mode, which will be detrimental to the role of the diaphragm 340 in suppressing the swing of the connecting rod body 331. If the number of bent rod portions 3316 on both sides of the first reference line ED is greater than 8, the lateral stiffness of the connecting rod body 331 may decrease, resulting in a relative decrease in the reliability of the connecting rod body 331. Therefore, setting the number of bent rod portions 3316 on both sides of the first reference line ED to between 3 and 8 can reduce the large displacement amplitude swing of the connecting rod body 331 and facilitate the diaphragm 340 to better suppress the swing of the connecting rod body 331, thereby reducing the air conduction noise generated by the connecting rod body 331 and improving the sound quality of the earphone 1. At the same time, it can increase the lateral stiffness of the connecting rod body 331 and improve the reliability of the transducer 300.

[0087] For example, in some embodiments, the number of bent rod portions 3316 on both sides of the first reference line ED can be 5. In other words, the connecting rod body 331 has a total of 10 bent rod portions 3316. This arrangement allows the connecting rod body 331 to have strong lateral stiffness, making it less prone to breakage during the deformation of the transducer 200, thereby improving the reliability and structural stability of the transducer 300. At the same time, the connecting rod body 331 will not swing excessively, thus reducing the possibility of the diaphragm 340 being punctured or damaged by the connecting rod body 331. It also allows the diaphragm 340 to better suppress the swing of the connecting rod body 331, thereby reducing the air conduction noise generated by the connecting rod body 331.

[0088] In some embodiments, such as Figure 6 , Figure 12 and Figure 13 As shown, the inner ring portion 310 and / or the outer ring portion 320 are provided with wiring holes 322, and the transducer 300 also has a third reference line IJ and a fourth reference line IK. The third reference line IJ and the fourth reference line IK pass through the center of the inner ring portion 310 and intersect with the outer ring portion 320 respectively, thereby defining a wiring area 323. The wiring hole 322 is located inside the wiring area 323, and the connecting rod 330 is located outside the wiring area 323. The angle between the third reference line IJ and the fourth reference line IK used to define the wiring area 323 is between 30° and 50°.

[0089] For example, the angle between the third reference line IJ and the fourth reference line IK used to define the routing area 323 can be 30°, 32°, 35°, 38°, 40°, 43°, 45°, 48° or 50°.

[0090] like Figure 12 as well as Figure 13As shown, the earphone 1 may include a wire 400. The wire 400 extends into the interior of the transducer 200 through the wiring hole 322 and the center of the inner ring portion 310 and is electrically connected to the voice coil 210. The wiring hole 322 is disposed in the wiring area 323 and the connecting rod 330 is disposed outside the wiring area 323.

[0091] As an example, the center of the inner ring portion 310 may be as follows: Figure 6 as well as Figure 13 As shown at midpoint I, the third reference line and the fourth reference line can be seen as follows: Figure 6 as well as Figure 13 The center lines IJ and IK are shown. The angle between the third reference line IJ and the fourth reference line IK, used to define the routing area 323, can be shown as follows. Figure 6 as well as Figure 13 As shown by the mid-angle β.

[0092] If the angle between the third reference line IJ and the fourth reference line IK used to define the wiring area 323 is greater than 50°, it indicates that the area of ​​the wiring area 323 is too large, and the spacing between the two connecting rods 330 on both sides of the wiring area 323 is too large, which will affect the vibration damping effect of the connecting rods 330. If the angle between the third reference line IJ and the fourth reference line IK used to define the wiring area 323 is less than 30°, it indicates that the area of ​​the wiring area 323 is too small, and the spacing between the connecting rods 330 on both sides of the wiring area 323 is too small. This will make it easy for the connecting rods 330 to touch the wire 400 when deforming, which will easily generate more noise, and the wire 400 will also be easily cut.

[0093] Therefore, by setting the angle between the third reference line IJ and the fourth reference line IK used to define the wiring area 323 to be between 30° and 50°, the transmission effect of the connecting rod 330 can be increased, such as vibration reduction, to reduce housing vibration other than vibration noise, reduce the tingling sensation felt on the face, and make it less likely for the connecting rod 330 to touch the wire 400, reducing the noise of the connecting rod 330 colliding with the wire 400, reducing the risk of the wire 400 being cut by the connecting rod 330, and also reducing the degree of bending of the wire 400, thereby facilitating the installation of the wire 400.

[0094] In some embodiments, such as Figure 12 as well as Figure 13 As shown, a through hole 410 can be provided in the liner 340 at the position corresponding to the wiring area 323, and the wire 400 can be pulled from above the through hole 410 to the wiring hole 322. In this way, providing a through hole 410 in the liner 340 can better facilitate the wire 400 to avoid gaps, and can reduce the installation margin of the wire 400 from hitting the liner 340, thereby reducing unnecessary noise.

[0095] In some embodiments, the through-hole 410 can be rectangular in shape. For example... Figure 12 as well as Figure 13 As shown, the liner 340 can be provided with two through holes 410 along the long axis of the vibration transmission plate 300, and the two through holes 410 are spaced apart on both sides of the center of the inner ring portion 310. This arrangement allows the liner 340 to be axially symmetrical along the long axis of the vibration transmission plate 300, thereby increasing the structural stability and balance of the liner 340 and reducing the possibility of tearing damage when the liner 340 restricts the deformation of the connecting rod 330.

[0096] In summary, the vibration transducer 300 of this application is provided with an inner ring portion 310, an outer ring portion 320, and a plurality of connecting rods 330 connecting the inner ring portion 310 and the outer ring portion 320. One end of the connecting rod 330 is connected to the inner ring portion 310, and the other end is connected to the outer ring portion 320 via a second connecting portion 333. The connection point between the connecting rod 330 and the inner ring portion 310 and the connection point between the connecting rod 330 and the outer ring portion 320 defines a first reference line ED. The first reference line ED divides the connecting rod body 331 of the connecting rod 330 into a first part 3311 and a second part 3312, wherein the area ratio of the first part 3311 and the second part 3312 is between 0.8 and 1.2. This configuration allows the areas of the first part 3311 and the second part 3312 to be the same or nearly the same. When the first part 3311 and the second part 3312, which have similar areas, deform in opposite directions under the Nth mode of the vibration plate 300, the air conduction noise generated by the first part 3311 and the second part 3312 can cancel each other out. This can reduce the air conduction noise of the connecting rod body 331, thereby improving the sound output effect of the bone conduction speaker assembly 10 and enhancing the sound quality of the headphones 1.

[0097] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A vibration transducer, characterized in that, The vibration transducer includes an inner ring, an outer ring, and a plurality of connecting rods connecting the inner ring and the outer ring. Each connecting rod includes a connecting rod body, a first connecting part, and a second connecting part. One end of the connecting rod body is connected to the inner ring via the first connecting part, which is gradually widening in the direction close to the inner ring. The other end of the connecting rod body is connected to the outer ring via the second connecting part, which is also gradually widening in the direction close to the outer ring. When viewed along the axial direction of the vibration transducer, the vibration transducer has a major axis and a minor axis that intersect each other. The dimension of the vibration transducer along the major axis is larger than the dimension along the minor axis. The vibration transducer also has a first reference point located at the connection between the first connecting part and the connecting rod body, a second reference point located at the connection between the second connecting part and the connecting rod body, and a first reference line defined by the first reference point and the second reference point. The connecting rod body is divided by the first reference line into a first part and a second part located on both sides of the first reference line. The area ratio of the first part and the second part is between 0.8 and 1.

2.

2. The vibration transducer according to claim 1, characterized in that, The area ratio of the first part to the second part is between 0.9 and 1.

1.

3. The vibration transducer according to claim 1, characterized in that, The connecting rod body has a first body edge and a second body edge arranged opposite to each other. The first connecting portion has a first transition edge connecting the first body edge and the outer ring edge of the inner ring portion. The second connecting portion has a second transition edge connecting the second body edge and the inner ring edge of the outer ring portion. The first transition edge and the second transition edge are respectively arranged in a concave arc. The first reference point is the connection point between the first transition edge and the first body edge. The second reference point is the connection point between the second transition edge and the second body edge. The remaining intersection points of the first reference line with the first body edge and the second body edge are located between the first reference point and the second reference point.

4. The vibration transducer according to claim 1, characterized in that, The connecting rod body includes a plurality of straight rod sections arranged side by side and spaced apart from each other, and a plurality of bent rod sections connecting the plurality of straight rod sections in sequence. The vibration transducer also has a second reference line that passes through the midpoint of the line connecting the first reference point and the second reference point and intersects with the first reference line. The second reference line is located between two adjacent straight rod sections and is parallel to each other. The connecting rod body is divided into a third part and a fourth part located on both sides of the second reference line by the second reference line. The area ratio of the third part and the fourth part is between 0.8 and 1.

2.

5. The vibration transducer according to claim 4, characterized in that, The connecting rod body has a first body edge and a second body edge arranged opposite to each other. The first body edge includes a first straight edge located in the straight rod portion and a first curved edge located in the bent rod portion. The second body edge includes a second straight edge located in the straight rod portion and a second curved edge located in the bent rod portion. The first straight edge and the second straight edge in the same straight rod portion are parallel to each other. The first straight edge is tangent to the first curved edge it connects to, and the second straight edge is tangent to the second curved edge it connects to. The first curved edge and the second curved edge in the same bent rod portion are arranged in a circular arc shape with the same center.

6. The vibration transducer according to claim 4, characterized in that, The area ratio of the third part to the fourth part is between 0.9 and 1.

1.

7. The vibration transducer according to claim 4, characterized in that, The number of bent rod sections on both sides of the first reference line is the same.

8. The vibration transducer according to claim 4, characterized in that, The angle between the second reference line and the first reference line is between 80° and 100°.

9. The vibration transducer according to claim 4, characterized in that, The vibration transducer also includes a liner that is attached and fixed to the inner ring, the outer ring, and the plurality of connecting rods.

10. The vibration transducer according to claim 4, characterized in that, The number of the bent rods on both sides of the first reference line is between 3 and 8.

11. The vibration transducer according to claim 4, characterized in that, The lengths of the plurality of straight rods are set to increase in the direction close to the second reference line.

12. The vibration transducer according to claim 1, characterized in that, The inner ring portion and / or the outer ring portion are provided with wiring holes. The vibration transducer also has a third reference line and a fourth reference line. The third reference line and the fourth reference line pass through the center of the inner ring portion and intersect with the outer ring portion respectively, thereby defining a wiring area. The wiring hole is located within the wiring area, and the connecting rod is located outside the wiring area. The angle between the third reference line and the fourth reference line used to define the wiring area is between 30° and 50°.

13. A bone conduction speaker assembly, characterized in that, The bone conduction speaker assembly includes a housing, a transducer, and a vibration transducer as described in any one of claims 1-12, wherein the vibration transducer is used to connect the transducer to the housing and to suspend the transducer on the housing.

14. An earphone, characterized in that, The headphones include the bone conduction speaker assembly as described in claim 13.

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