Transducer device

Abstract

The present description relates to a transducer device, comprising: a first magnetic circuit assembly, which comprises a dynamic component and a static component, the static component being arranged around the dynamic component, and the dynamic component comprising a first magnet; a voice coil assembly; a spring plate assembly, which connects the dynamic component and the static component; and an auxiliary magnetic circuit assembly, which comprises a second magnet and a third magnet, wherein in a first direction parallel to the axis of the voice coil assembly, the second magnet and the third magnet are located on two sides of the first magnet respectively. The dynamic component comprises a first magnetically conductive plate and a second magnetically conductive plate, wherein the first magnetically conductive plate and the second magnetically conductive plate are located on two surfaces of the first magnet in the first direction, respectively; the polarity of the surface of the first magnet facing the first magnetically conductive plate is opposite to the polarity of the surface of the second magnet facing the first magnetically conductive plate in the first direction, and the polarity of the surface of the first magnet facing the second magnetically conductive plate is opposite to the polarity of the surface of the third magnet facing the second magnetically conductive plate in the first direction.

Description

A transducer Cross-references

[0001] This specification claims priority to Chinese application No. 202411844311.6, filed on December 13, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This specification relates to the field of acoustic technology, and in particular to a transducer. Background Technology

[0003] With the development of acoustic output technology, loudspeakers have been widely used in people's daily lives. They can be used with electronic devices such as mobile phones and computers to provide users with an auditory feast. In order to ensure that the loudspeaker has good output performance across the entire frequency range, it is generally necessary to design the loudspeaker's vibration structure so that the loudspeaker has strong driving force while having a resonant frequency in the mid-low frequency range. This allows the loudspeaker to have high sensitivity while also having good output performance in the mid-low frequency range. Summary of the Invention

[0004] One embodiment of this specification provides a transducer, comprising: a first magnetic circuit assembly including a dynamic component and a static component, the static component being disposed around the dynamic component, the dynamic component including a first magnet; a voice coil assembly fixed to the static component, the voice coil assembly being at least partially located in a magnetic gap between the static component and the dynamic component, the dynamic component being movable relative to the voice coil assembly and the static component, the voice coil assembly including at least one voice coil; and a spring assembly configured to connect the dynamic component and the static component, allowing the dynamic component to move relative to the static component in a first direction, the first direction being parallel to the magnetic circuit. The direction of the axis of the voice coil assembly; the auxiliary magnetic circuit assembly, including a second magnet and a third magnet, along the first direction, the second magnet and the third magnet are respectively located on both sides of the first magnet; wherein, the dynamic component includes a first magnetic guide plate and a second magnetic guide plate, the first magnetic guide plate and the second magnetic guide plate are respectively located on two surfaces of the first magnet along the first direction, the polarity between the surface of the first magnet facing the first magnetic guide plate and the surface of the second magnet facing the first magnetic guide plate along the first direction is opposite, and the polarity between the surface of the first magnet facing the second magnetic guide plate and the surface of the third magnet facing the second magnetic guide plate along the first direction is opposite.

[0005] One embodiment of this specification also provides a transducer, comprising: a first magnetic circuit assembly including a dynamic component and a static component, the static component being disposed around the dynamic component, the dynamic component including a first magnet; a voice coil assembly fixed to the static component, the voice coil assembly being at least partially located in a magnetic gap between the static component and the dynamic component, the dynamic component being movable relative to the voice coil assembly and the static component, the voice coil assembly including at least one voice coil; a spring assembly configured to connect the dynamic component and the static component, and allowing the dynamic component to move relative to the static component in a first direction, the first direction being a direction parallel to the axis of the voice coil assembly; and an auxiliary magnetic circuit assembly including a second magnet and a third magnet, the second magnet and the third magnet being disposed on... The sidewall of the static component; wherein, the dynamic component includes a first magnetic plate and a second magnetic plate, the first magnetic plate and the second magnetic plate being located on two surfaces of the first magnet along the first direction, the first magnetic plate being located between the second magnet and the first magnet in the first direction, and the second magnetic plate being located between the third magnet and the first magnet; the distance between the centerline plane of the second magnet parallel to the second direction and the centerline plane of the first magnetic plate parallel to the second direction in the first direction is 0.4mm-0.8mm; the distance between the centerline plane of the third magnet parallel to the second direction and the centerline plane of the first magnetic plate parallel to the second direction in the first direction is 0.4mm-0.8mm, the second direction being a direction perpendicular to the axis of the voice coil assembly. Attached Figure Description

[0006] This specification will be further described by way of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not limiting; in these embodiments, the same reference numerals denote the same structures, wherein:

[0007] Figure 1 is a schematic diagram of the structure of a loudspeaker according to some embodiments of this specification;

[0008] Figures 2A and 2B are schematic diagrams of the transducer device according to some embodiments of this specification;

[0009] Figures 3A and 3B are schematic diagrams showing the positions of dynamic components according to some embodiments of this specification;

[0010] Figures 4A and 4B are schematic diagrams of different structures of the transducer according to some embodiments of this specification;

[0011] Figures 5-7 are magnetic force curves showing the movement of a dynamic component when a second magnet is embedded in a static component according to some embodiments of this specification;

[0012] Figure 8 is a structural schematic diagram of a static component according to some embodiments of this specification;

[0013] Figure 9 is another structural schematic diagram of the transducer device according to some embodiments of this specification;

[0014] Figures 10A and 10B are schematic diagrams showing the positions of dynamic components according to some embodiments of this specification;

[0015] Figures 11A and 11B are another structural schematic diagram of the transducer device shown according to some embodiments of this specification;

[0016] Figures 12A and 12B are another structural schematic diagram of the transducer device according to some embodiments of this specification;

[0017] Figures 13A and 13B are another structural schematic diagram of the transducer device shown according to some embodiments of this specification;

[0018] Figure 14A is another structural schematic diagram of the transducer device according to some embodiments of this specification;

[0019] Figure 14B is another structural schematic diagram of a transducer device according to some embodiments of this specification. Detailed Implementation

[0020] To more clearly illustrate the technical solutions of the embodiments in this specification, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this specification. For those skilled in the art, these drawings can be applied to other similar scenarios without creative effort. It should be understood that these exemplary embodiments are given merely to enable those skilled in the art to better understand and implement this specification, and are not intended to limit the scope of this specification in any way. Unless obvious from the linguistic context or otherwise, the same reference numerals in the figures represent the same structures or operations.

[0021] As indicated in this specification and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" are not specifically singular and may include plural forms. Generally, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. The term "based on" means "at least partially based on." The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment."

[0022] In the description of this specification, it should be understood that the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this specification and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this specification.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this specification, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0024] In this specification, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this specification according to the specific circumstances.

[0025] Figure 1 is a schematic diagram of a loudspeaker according to some embodiments of this specification. As shown in Figure 1, some embodiments of this specification provide a loudspeaker 100, which includes a housing 110 and a transducer. The transducer 120 is used to vibrate to generate sound and transmit it to the user through the housing 110.

[0026] In some embodiments, the loudspeaker 100 may also be an air-conducting loudspeaker, and correspondingly, the transducer 120 may be an air-conducting transducer. The housing 110 may be provided with a sound outlet (not shown in the figure) that is acoustically coupled to the transducer 120. One end of the transducer 120 in the vibration direction may be connected to the diaphragm. The transducer 120 drives the diaphragm to vibrate and generate air-conducting sound. The air-conducting sound is transmitted to the user's ear canal through the sound outlet, so that the user can receive the air-conducting sound.

[0027] In some embodiments, as shown in FIG1, the speaker 100 can be a bone conduction speaker, and correspondingly, the transducer 120 can be a bone conduction transducer. The housing 110 may include a vibrating panel 112 for conforming to the user's face. The transducer 120 is connected to the vibrating panel 112 and is configured to drive the vibrating panel 112 to vibrate so that the vibrating panel 112 generates bone conduction sound. In the wearing state, the vibrating panel 112 transmits bone conduction sound through the user's face to the user's cochlea, allowing the user to receive bone conduction sound.

[0028] In some embodiments, the loudspeaker 100 can be a combined air-bone conduction loudspeaker, and the number of transducers 120 can be one or more. When there is only one transducer 120, the housing 110 can include a vibrating panel 112 and the housing 110 is provided with a sound outlet. The transducer 120 can drive the vibrating panel 112 to vibrate and generate bone conduction sound while simultaneously driving the diaphragm to vibrate. When there are multiple transducers 120, at least one transducer 120 can be an air-conducting transducer that drives the diaphragm to vibrate and generate air-conducting sound, and at least another transducer 120 can be a bone conduction transducer that drives the vibrating panel 112 to vibrate and generate bone conduction sound.

[0029] In some embodiments, the transducer 120 includes a voice coil assembly 130, a first magnetic circuit assembly 140, and a spring assembly 150.

[0030] The first magnetic circuit assembly 140 includes a static component 160 and a dynamic component 170. The dynamic component 170 includes a first magnet 171. The static component 160 includes a magnetic conductor 161 disposed at least partially around the dynamic component 170 (e.g., the first magnet 171). The magnetic conductor 161 is configured to conduct the magnetic field generated by the dynamic component 170 (e.g., the first magnet 171).

[0031] The voice coil assembly 130 is fixed to the static member 160, and the voice coil assembly 130 is at least partially located in the magnetic gap between the static member 160 and the dynamic member 170 (e.g., the magnetic gap formed between the magnetic conductor 161 and the dynamic member 170). The position of the dynamic member 170 is movable relative to the voice coil assembly 130 and the static member 160. The voice coil assembly 130 includes at least one voice coil, and the axis M of the voice coil assembly 130 is aligned with the vibration direction of the transducer 120. In some embodiments, the voice coil assembly 130 may include two voice coils, each at least partially located in a magnetic gap at either end of the vibration direction of the transducer 120.

[0032] The spring assembly 150 is configured to connect the dynamic component 170 and the static component 160, and to allow the dynamic component 170 and the static component 160 to move relative to each other in a first direction X, which is parallel to the axis M. In some embodiments, the static component 160 is connected to the housing 110, and the dynamic component 170 vibrates relative to the static component 160 and the housing 110. During the movement of the dynamic component 170 relative to the static component 160, the spring assembly 150 provides a first restoring force that returns the dynamic component 170 to its equilibrium position, and the first magnetic circuit assembly 140 (e.g., the static component 160) provides a second restoring force that returns the dynamic component 170 to its equilibrium position. The first and second restoring forces tend to cause the dynamic component 170 to return to its equilibrium position. The first restoring force provided by the spring assembly 150 can interact with the second restoring force provided by the first magnetic circuit assembly 140 to jointly regulate the vibration difficulty of the dynamic component 170, thereby regulating the driving force of the transducer 120 and adjusting the output performance of the speaker 100. The balance position refers to the relative position of the dynamic component 170 and the static component 160 when the voice coil assembly 130 is not energized.

[0033] In some embodiments, one end of the transducer 120 in the vibration direction can be connected to the housing 110 to fix the transducer 120. In some embodiments, both ends of the transducer 120 in the vibration direction can be connected to the housing 110 to fix the transducer 120. In some embodiments, the outer surface of the transducer 120 (e.g., the outer surface of the static component 160 or the outer surface of the magnetic conductor 161) can be connected to the housing 110 to fix the transducer 120.

[0034] In some embodiments, in order to reduce the F0 characteristic resonant frequency of the transducer 120 and improve the output performance of the loudspeaker 100, the transducer 120 can be designed to increase its driving force. For example, an auxiliary magnetic circuit assembly can be designed to provide a compensating force that causes the dynamic component 170 to deviate from its equilibrium position, thereby counteracting the partial restoring force provided by the first magnetic circuit assembly 140 and the spring assembly 150 that causes the dynamic component 170 to return to its equilibrium position. This reduces the difficulty of moving the dynamic component 170 and thus increases the driving force of the transducer 120.

[0035] Figures 2A and 2B are schematic diagrams of the transducer device according to some embodiments of this specification. Referring to Figure 2A, the transducer device 120 further includes an auxiliary magnetic circuit assembly 180, which includes a second magnet 182. The second magnet 182 and the first magnet 171 are spaced apart in the second direction Y. During the movement of the dynamic component 170 relative to the static component 160, the first magnetic circuit assembly 140 provides a second restoring force to restore the dynamic component 170 to its equilibrium position, and the spring assembly 150 provides a first restoring force to restore the dynamic component 170 to its equilibrium position. The auxiliary magnetic circuit assembly 180 interacts with the first magnet 171, providing a force that causes the dynamic component 170 to deviate from its equilibrium position. That is, the auxiliary magnetic circuit assembly 180 interacts with the first magnetic circuit assembly 140 to provide a compensating force that causes the dynamic component 170 to deviate from its equilibrium position. In this case, the first restoring force provided by the spring assembly 150 can interact with the compensating force provided by the auxiliary magnetic circuit assembly 180 and the first magnetic circuit assembly 140 to jointly adjust the vibration difficulty of the dynamic component 170, thereby adjusting the driving force of the transducer 120, adjusting the F0 characteristic of the transducer 120, and adjusting the output performance of the loudspeaker 100. For more details on the operation of the auxiliary magnetic circuit assembly 180, please refer to Figures 3A and 3B and their related descriptions, which will not be repeated here.

[0036] In some embodiments, in order for the force provided by the auxiliary magnetic circuit assembly 180 to counteract at least a portion of the second restoring force provided by the first magnetic circuit assembly 140, the auxiliary magnetic circuit assembly 180 cooperates with the first magnetic circuit assembly 140 to provide a compensating force, and the angle between the polarization direction of the first magnetic circuit assembly 140 and the polarization direction of the auxiliary magnetic circuit assembly 180 is 80°-100°. In some embodiments, the polarization direction of the first magnetic circuit assembly 140 and the polarization direction of the auxiliary magnetic circuit assembly 180 may be perpendicular. The polarization direction of the auxiliary magnetic circuit assembly 180 may refer to the polarization direction of any magnet (e.g., a second magnet, a third magnet, a fourth magnet, etc.) of the auxiliary magnetic circuit assembly 180.

[0037] In some embodiments, when the spring assembly 150 includes only one transducer, the transducer can be disposed at any end of the dynamic component 170 along the first direction X. In this case, the voice coil assembly 130 can include only one voice coil, which at least partially extends into the magnetic gap between the end of the dynamic component 170 where the transducer is disposed and the static component 160, as shown in FIG2A.

[0038] In some embodiments, when the spring assembly 150 includes two transducer plates, the two transducer plates are respectively connected to both ends of the dynamic component 170 along the first direction X. In this case, the voice coil assembly 130 may include two voice coils, each at least partially located in the magnetic gaps corresponding to both ends of the dynamic component 170 along the first direction X, as shown in FIG2B. The arrangement of the two transducer plates can improve the vibration stability of the transducer 120 and enhance the output quality of the loudspeaker 100.

[0039] In some embodiments, the two resonant plates of the spring assembly 150 allow the dynamic component 170 to vibrate relative to the static component 160, and this vibration generates at least one resonant peak with a frequency in the range of 100Hz-200Hz. That is, the output of the loudspeaker 100 includes a resonant peak with a frequency in the range of 100Hz-200Hz, thereby improving the output of the loudspeaker 100 in the mid-low frequency range (e.g., below 250Hz), giving the loudspeaker 100 better output performance in the mid-low frequency range.

[0040] In some embodiments, the dynamic component 170 includes a magnetic guide plate 121 disposed on the surface of the first magnet 171 along a first direction X, and the magnetic guide plate 121 connects the first magnet 171 and the spring assembly 150. The surface of the first magnet 171 facing the magnetic guide plate 121 along the first direction X and the surface of the second magnet 182 facing the dynamic component 170 along the second direction Y have the same polarity, and the second magnet 182 and the first magnet 171 are mutually repelled. For example, as shown in FIG2A, the magnetic guide plate 121 is disposed on the upper side of the first magnet 171 along the first direction X, the upper side of the first magnet 171 is the N pole, and the surface of the second magnet 182 facing the dynamic component 170 along the second direction Y is the N pole.

[0041] In some embodiments, the second magnet 182 is disposed on the outer periphery of the static component 160 (e.g., the magnetic conductor 161) to minimize the possibility of the second magnet 182 entering the magnetic gap and interfering with the magnetic field of the first magnetic circuit assembly 140.

[0042] In some embodiments, the first distance between the magnetic plate 121 and the second magnet 182 in the first direction X is no greater than 0.8 mm, to ensure mutual repulsion between the second magnet 182 and the first magnet 171, and to prevent the second magnet 182 and the first magnet 171 from being too far apart. This ensures that the auxiliary magnetic circuit assembly 180 provides sufficient force to the dynamic component 170 to deviate from its equilibrium position, so that the auxiliary magnetic circuit assembly 180 and the first magnetic circuit assembly 140 cooperate to provide a compensating force that causes the dynamic component 170 to deviate from its equilibrium position. In some embodiments, to ensure that the auxiliary magnetic circuit assembly 180 provides sufficient force, the first distance between the magnetic plate 121 and the second magnet 182 in the first direction X is no greater than 0.55 mm.

[0043] The first distance between the magnetic plate 121 and the second magnet 182 in the first direction X can be the distance between the centerline plane C2 of the magnetic plate 121 parallel to the second direction Y and the centerline plane C1 of the second magnet 182 parallel to the second direction Y in the first direction X, such as the first distance d2 shown in Figure 3A. The centerline plane C2 of the magnetic plate 121 parallel to the second direction Y means that the magnetic plate 121 has a cross-sectional shape along the first direction X (e.g., a plane passing through axis M), and this cross-sectional shape has a centerline perpendicular to the first direction X. The plane formed by different centerlines corresponding to different cross-sections is the centerline plane. For example, in Figure 3A, the cross-sectional shape of the magnetic plate 121 is rectangular, and this rectangle has a centerline perpendicular to the first direction X. The plane perpendicular to the first direction X containing this centerline is the centerline plane C2 of the magnetic plate 121. In some embodiments, the dynamic component 170 may move up or down relative to the static component 160 based on the equilibrium position in the first direction X. The first distance between the magnetic plate 121 and the second magnet 182 in the first direction X is not greater than 0.8 mm, which means that the second magnet 182 may be positioned within the area where the magnetic plate 121 moves up or down by 0.8 mm, based on the equilibrium position of the magnetic plate 121.

[0044] In some embodiments, the thickness dimension of the second magnet 182 in the first direction X and the first distance d2 can affect the magnitude of the force provided by the auxiliary magnetic circuit assembly 180 to the dynamic component, thereby affecting the magnitude of the compensating force provided by the auxiliary magnetic circuit assembly 180 in cooperation with the first magnetic circuit assembly 140. In some embodiments, to ensure that the magnitude of the compensating force provided by the auxiliary magnetic circuit assembly 180 in cooperation with the first magnetic circuit assembly 140 is appropriate, the ratio of the first distance d2 to the thickness dimension of the second magnet 182 in the first direction X can be 0-1.3. In some embodiments, to avoid the force provided by the auxiliary magnetic circuit assembly 180 being too small, so that the auxiliary magnetic circuit assembly 180 in cooperation with the first magnetic circuit assembly 140 cannot provide a compensating force opposite to the direction of the first restoring force, the ratio of the first distance d2 to the thickness dimension of the second magnet 182 in the first direction X can be 0.5-1.0. In some embodiments, to further ensure that the magnitude of the compensating force provided by the auxiliary magnetic circuit assembly 180 in cooperation with the first magnetic circuit assembly 140 is appropriate, the ratio of the first distance d2 to the thickness dimension of the second magnet 182 in the first direction X can be 0.7-0.8.

[0045] In some embodiments, when the spring assembly 150 includes only one vibration transmission plate, the vibration transmission plate and the magnetic guide plate 121 can be disposed at the same end or different ends of the first magnet 171 along the first direction X. For example, the magnetic guide plate 121 can be disposed on the upper side of the first magnet 171 along the first direction X, and the vibration transmission plate can be disposed on the lower side of the first magnet 171 along the first direction X; or, the magnetic guide plate 121 can be disposed on the upper side of the first magnet 171 along the first direction X, and the vibration transmission plate can be disposed on the magnetic guide plate 121, as shown in FIG2A; or, the magnetic guide plate 121 can be disposed on the lower side of the first magnet 171 along the first direction X, and the vibration transmission plate can be disposed on the upper side of the first magnet 171 along the first direction X; or, the magnetic guide plate 121 can be disposed on the lower side of the first magnet 171 along the first direction X, and the vibration transmission plate can be disposed on the magnetic guide plate 121.

[0046] In some embodiments, in the second direction Y, the second distance (as shown in Figures 3A and 4A, the second distance d3) between the side of the second magnet 182 facing the first magnet 171 and the side of the magnetic guide plate 121 facing the second magnet 182 can reflect the magnitude of the force exerted by the second magnet 182 on the first magnet 171. If the second distance is too large, that is, the first magnet 171 and the second magnet 182 are too far apart, the force exerted by the second magnet 182 on the first magnet 171 is small, and the force provided by the auxiliary magnetic circuit assembly 180 is small. This may result in less or almost no offsetting of the total force provided by the auxiliary magnetic circuit assembly 180 to the first magnetic circuit assembly 140. That is, the force provided by the auxiliary magnetic circuit assembly 180 is less than the second restoring force provided by the first magnetic circuit assembly 140. The force provided by the auxiliary magnetic circuit assembly 180 and the first magnetic circuit assembly 140 in cooperation is still a compensating force to restore the dynamic component 170 to the equilibrium position, resulting in a smaller increase in the driving force of the auxiliary magnetic circuit assembly 180 on the transducer 120 and a smaller increase in the output performance of the speaker 100. If the second distance is too small, the magnetic gap between the static component 160 and the dynamic component 170 may be too small, affecting the installation and vibration of the voice coil assembly 130. In some embodiments, to ensure that the second magnet 182 provides sufficient force and to reduce the impact on the magnetic gap and the coil, the second distance is 0.4mm-1.9mm. In some embodiments, to ensure the normal operation of the speaker 100, the second distance is 0.5mm-1.5mm. In some embodiments, to ensure that the second magnet 182 provides sufficient force while ensuring the normal operation of the speaker 100, the second distance can be 0.6mm-1.2mm.

[0047] In some embodiments, the second magnet 182 has a width dimension d4 in the second direction Y, as shown in FIG3A. The larger the width dimension d4 of the second magnet 182, the stronger the magnetism of the second magnet 182, and the greater the effect of the second magnet 182 on the first magnet 171. In some embodiments, in order to ensure that the second magnet 182 provides sufficient force, the width dimension d4 of the second magnet 182 in the second direction Y can be 0.6mm-1.2mm. In some embodiments, in order to make the second magnet 182 have suitable magnetism, the width dimension d4 of the second magnet 182 in the second direction Y can be 0.8mm-1.0mm.

[0048] In some embodiments, to ensure that the second magnet 182 provides sufficient force, the ratio of the second distance d3 to the width dimension d4 of the second magnet 182 in the second direction Y is 0.3-3.2. In some embodiments, to ensure that the second magnet 182 has suitable magnetism, the ratio of the second distance d3 to the width dimension d4 of the second magnet 182 in the second direction Y is 0.5-2.5.

[0049] Figures 3A and 3B are schematic diagrams showing the positions of dynamic components according to some embodiments of this specification.

[0050] Please refer to Figures 2A, 2B, and 3A. In Figures 2A and 2B, the dynamic component 170 is in an equilibrium position. When the dynamic component 170 moves downward relative to the static component 160 in the first direction X, as shown in Figure 3A, the upper surface of the second magnet 182 is closer to the upper surface of the first magnet 171, while the lower surface of the second magnet 182 is farther away from the lower surface of the first magnet 171. The force exerted by the second magnet 182 on the first magnet 171 is mainly a repulsive force exerted by the second magnet 182 on the upper surface of the first magnet 171; the attractive force exerted by the second magnet 182 on the lower surface of the first magnet 171 can be ignored. When the dynamic component 170 moves downward relative to the static component 160 in the first direction X as shown in FIG3A, the repulsive force of the second magnet 182 on the upper side of the first magnet 171 is downward, that is, the second magnet 182 provides a force that causes the dynamic component 170 to deviate from the equilibrium position, and the auxiliary magnetic circuit assembly 180 cooperates with the first magnetic circuit assembly 140 to provide a compensating force that causes the dynamic component 170 to deviate from the equilibrium position.

[0051] Please refer to Figures 2A, 2B, and 3B. In Figures 2A and 2B, the dynamic component 170 is in an equilibrium position. When the dynamic component 170 moves upward relative to the static component 160 in the first direction X, as shown in Figure 3B, the upper surface of the second magnet 182 is closer to the upper surface of the first magnet 171, while the lower surface of the second magnet 182 is farther from the lower surface of the first magnet 171. The force exerted by the second magnet 182 on the first magnet 171 is mainly a repulsive force exerted by the second magnet 182 on the upper surface of the first magnet 171; the attractive force exerted by the second magnet 182 on the lower surface of the first magnet 171 can be ignored. When the dynamic component 170 moves upward relative to the static component 160 in the first direction X as shown in FIG3A, the repulsive force of the second magnet 182 on the upper side of the first magnet 171 is upward, that is, the second magnet 182 provides a force that causes the dynamic component 170 to deviate from the equilibrium position, and the auxiliary magnetic circuit assembly 180 cooperates with the first magnetic circuit assembly 140 to provide a compensating force that causes the dynamic component 170 to deviate from the equilibrium position.

[0052] It should be noted that, during the movement of the dynamic component 170, the force exerted by the spring assembly 150 on the dynamic component 170 is related to Figures 3A and 3B and their related descriptions above, and will not be repeated here.

[0053] In some embodiments, the force exerted by the second magnet 182 on the first magnet 171 includes a force along the first direction X and a component force along the second direction Y. In some embodiments, the second magnet 182 has a symmetrical structure in the second direction Y so that the component force of the second magnet 182 on the first magnet 171 along the second direction Y can cancel each other out, thereby minimizing the deviation of the dynamic component 170 in the second direction Y, improving the vibration stability of the transducer 120, and improving the output quality of the speaker 100.

[0054] When the dynamic component 170 moves relative to the static component 160 in the first direction X, the first restoring force provided by the spring assembly 150 prevents the dynamic component 170 from moving further, while the compensating force provided by the auxiliary magnetic circuit assembly 180 (second magnet 182) in cooperation with the first magnetic circuit assembly 140 (static component 160) drives the dynamic component 170 to move further. That is, the force exerted by the second magnet 182 on the dynamic component 170 can cancel out the second restoring force provided by the first magnetic circuit assembly 140, and make the force provided by the auxiliary magnetic circuit assembly 180 in cooperation with the first magnetic circuit assembly 140 a compensating force that causes the dynamic component 170 to deviate from its equilibrium position, reducing the difficulty for the dynamic component 170 to continue moving, thereby indirectly reducing the F0 characteristic of the transducer 120, improving the driving force of the transducer 120, and improving the output performance of the speaker 100.

[0055] To avoid excessive movement of the dynamic component 170, which could cause interference between the dynamic component 170 and other components (such as the vibration damper, housing 110, etc.) and affect normal use, in some embodiments, the movement distance of the dynamic component 170 relative to the equilibrium position in the first direction X is 0mm-1.0mm. It should be noted that 0mm-1.0mm means that the upward movement distance of the dynamic component 170 relative to the equilibrium position in the first direction X does not exceed 1.0mm, and the downward movement distance in the first direction X does not exceed 1.0mm. In some embodiments, to further avoid interference between the dynamic component 170 and other components, the movement distance of the dynamic component 170 relative to the equilibrium position in the first direction X is 0mm-0.8mm.

[0056] Figures 4A and 4B are schematic diagrams of different structures of the transducer according to some embodiments of this specification.

[0057] Referring to Figures 2A and 2B, in some embodiments, the second magnet 182 is attached to the outer periphery of the static component 160 (e.g., the magnetic conductor 161) so that the second magnet 182 and the first magnet 171 have a suitable distance in the second direction Y.

[0058] Referring to Figures 4A and 4B, in some embodiments, the outer periphery of the static component 160 is provided with a groove structure (not shown in the figures), and at least a portion of the second magnet 182 is embedded in the groove structure. This reduces the distance between the second magnet 182 and the first magnet 171 in the second direction Y while fixing the second magnet 182, increases the force exerted by the second magnet 182 on the first magnet 171, further increases the compensation force provided by the auxiliary magnetic circuit assembly 180 and the first magnetic circuit assembly 140, reduces the F0 characteristic of the transducer 120, improves the driving force of the transducer 120, and improves the output performance of the speaker 100.

[0059] In some embodiments, when the second magnet 182 is attached to the outer periphery of the static member 160 or disposed in a groove structure of the static member 160, the voice coil assembly 130 can be directly connected to the static member 160. For example, the voice coil assembly 130 can be attached to the inner side of the static member 160; or, the inner side of the static member 160 is provided with a stepped portion (e.g., the protrusion 190 described below), and the voice coil assembly 130 is disposed on the stepped portion. In some embodiments, the voice coil assembly 130 can also be connected to the housing 110, and the static member 160 is connected to the housing 110. In some embodiments, in the second direction Y, there is a gap between the static member 160 and the voice coil assembly 130, thereby facilitating the placement of other structures between the static member 160 and the voice coil assembly 130. For example, the second magnet 182 can extend through the static member 160 into the gap between the static member 160 and the voice coil assembly 130.

[0060] Figures 5-7 are magnetic force curves showing the movement of a dynamic component when the second magnet is embedded in a static component according to some embodiments of this specification. It should be noted that the curves shown in Figures 5-7 only represent the forces provided by the first magnetic circuit assembly 140 and the auxiliary magnetic circuit assembly 180 to the dynamic component 170, and do not consider the first restoring force provided by the spring assembly 150 to the dynamic component 170. Specifically, in Figure 5, the thickness of the static component 160 in the second direction Y is 0.4 mm, and the thickness of the second magnet 182 in the first direction X is 0.6 mm; in Figure 6, the thickness of the static component 160 in the second direction Y is 0.6 mm, and the thickness of the second magnet 182 in the first direction X is 0.6 mm; in Figure 7, the thickness of the static component 160 in the second direction Y is 0.6 mm, and the thickness of the second magnet 182 in the first direction X is 1.2 mm. The horizontal axis of Figures 5-7 represents the position of the dynamic component 170, where 0 indicates that the dynamic component 170 is in the equilibrium position, negative numbers indicate the distance the dynamic component 170 moves downward along the first direction X, and positive numbers indicate the distance the dynamic component 170 moves upward along the first direction X; the vertical axis of Figures 5-7 represents the force on the dynamic component 170, where negative numbers indicate that the dynamic component 170 is subjected to a downward force along the first direction X, and positive numbers indicate that the dynamic component 170 is subjected to an upward force along the first direction X.

[0061] Please refer to Figure 5, where curve L... 81 This represents the force curve of the dynamic component 170 during its movement when the second magnet 182 is not installed; curve L 82 This represents the force curve of the dynamic component 170 during movement when the second magnet 182 is embedded in the static component 160 with a dimension of 0 mm (i.e., the second magnet 182 is attached to the outer surface of the static component 160); Curve L 83This represents the force curve of the dynamic component 170 during its movement when the second magnet 182 is embedded in the static component 160 by a size of 0.20 mm; curve L 84 This represents the force curve of the dynamic component 170 during its movement when the second magnet 182 is embedded in the static component 160 by a size of 0.30 mm; curve L 85 This represents the force curve of the dynamic component 170 during its movement when the second magnet 182 is embedded in the static component 160 by a size of 0.35 mm; curve L 86 This represents the force curve of the dynamic component 170 during its movement when the second magnet 182 is embedded in the static component 160 with a dimension of 0.37 mm; curve L 87 The curve L represents the force curve of the dynamic component 170 during its movement when the second magnet 182 is embedded in the static component 160 with a size of 0.38 mm. 88 The curve L represents the force curve of the dynamic component 170 during its movement when the second magnet 182 is embedded in the static component 160 by a dimension of 0.40 mm (i.e., the second magnet 182 just penetrates the static component 160 but does not protrude from the inner wall of the static component 160). 89 The force curve of the dynamic component 170 during its movement is shown when the second magnet 182 is embedded in the static component 160 with a size of 0.42 mm (i.e., the second magnet 182 penetrates the static component 160 and extends from the inner wall of the static component 160).

[0062] Please refer to curve L. 81 With curve L 82 Curve L 83 Curve L 84 Curve L 85 Curve L 86 Curve L 87 Compared to curve L without the second magnet 182, 81 The curve L of the second magnet 182 was set. 82 -Curve L 87 The overall downward shift indicates that the second magnet 182 can effectively counteract the second restoring force provided by the first magnetic circuit assembly 140 to the dynamic component 170, thereby enhancing the vibration performance of the dynamic component 170, increasing the driving force of the transducer 120, reducing the F0 characteristic of the transducer 120, and improving the output performance of the speaker 100.

[0063] Please refer to curve L. 82 Curve L 83 Curve L 84 Curve L 85 Curve L 86 Curve L 87The left half of the graph shows that as the size of the second magnet 182 embedded in the static component 160 gradually increases, the corresponding curves decrease from high to low, with the curves gradually shifting downwards and the magnitude of the downward shift decreasing. This indicates that as the size of the second magnet 182 embedded in the static component 160 gradually increases, the force exerted by the second magnet 182 on the dynamic component 170 (the first magnet 171) gradually strengthens, and the effect of the first magnetic circuit assembly 140 on offsetting the second restoring force provided by the first magnetic circuit assembly 140 on the dynamic component 170 gradually strengthens. This enhances the vibration performance of the dynamic component 170, increases the driving force of the transducer 120, reduces the F0 characteristic of the transducer 120, and improves the output performance of the speaker 100. Simultaneously, as the size of the second magnet 182 embedded in the static component 160 gradually approaches the thickness of the static component 160 in the second direction Y, the magnitude of the increase in the force exerted by the second magnet 182 on the dynamic component 170 (the first magnet 171) gradually decreases.

[0064] Please refer to curve L. 82 Curve L 83 Curve L 84 Curve L 85 Curve L 86 Curve L 87 It can be seen that in curve L 82 Curve L 83 Curve L 84 Curve L 85 Curve L 86 Curve L 87 In all cases, there exist points on certain segments whose x-coordinates and y-coordinates have the same sign. For example, curve L... 82 Curve L 83 The corresponding segment with abscissa [-1, 1], curve L 84 The corresponding x-coordinate segment is [-2, 2], and the curve L is... 85 Curve L 86 Curve L 87 The corresponding abscissa is the segment [-3, 3]. This indicates that when the dynamic component 170 moves within the distance range corresponding to the segment, the direction of the force acting on the dynamic component 170 is the same as the direction of movement, and the direction of the force acting on the dynamic component 170 is away from the equilibrium position. That is, at this time, the first magnetic circuit assembly 140 and the auxiliary magnetic circuit assembly 180 cooperate to provide a compensating force that causes the dynamic component 170 to deviate from the equilibrium position, which greatly enhances the vibration capability of the dynamic component 170.

[0065] Please refer to curve L. 81 With curve L 88 Curve L 89 Compared to curve L without the second magnet 182, 81 The second magnet 182 penetrates the L corresponding to the static component 160.88 Curve L 89 The force shifts upwards noticeably. This indicates that after the second magnet 182 penetrates the static component 160 and enters the magnetic gap, the force exerted by the second magnet 182 on the dynamic component 170 (the first magnet 171) no longer cancels out the second restoring force provided by the first magnetic circuit assembly 140 on the dynamic component 170. Please refer to curve L. 81 With curve L 88 Curve L 89 curve L 81 With curve L 88 Curve L 89 The fact that the x-coordinate and y-coordinate of the points on the graph are opposite in sign over a large range indicates that when the dynamic component 170 moves downward or upward along the first direction X, the direction of the force acting on the dynamic component 170 is opposite to the direction of movement. The direction of the force acting on the dynamic component 170 points towards the equilibrium position. That is, at this time, the first magnetic circuit assembly 140 and the auxiliary magnetic circuit assembly 180 work together to provide a restoring force that allows the dynamic component 170 to return to the equilibrium position, which greatly reduces the vibration capability of the dynamic component 170.

[0066] In summary, in some embodiments, to reduce the F0 characteristic of the transducer 120 and improve the output performance of the loudspeaker 100, the size of the second magnet 182 embedded in the static component 160 is less than or equal to the thickness of the static component 160 in the second direction Y, and the ratio of the size of the second magnet 182 embedded in the static component 160 to the thickness of the static component 160 in the second direction Y can be 0-0.95. In some embodiments, to further ensure the output performance of the loudspeaker 100, the ratio of the thickness of the second magnet 182 embedded in the static component 160 to the thickness of the static component 160 in the second direction Y can be 0-0.95.

[0067] Please refer to Figure 6, where curve L... 81 With curve L in Figure 5 81 Corresponding; Curve L 91 This represents the force curve of the dynamic component 170 during its movement when the second magnet 182 is not installed; curve L 92 This represents the force curve of the dynamic component 170 during movement when the second magnet 182 is embedded in the static component 160 with a dimension of 0 mm (i.e., the second magnet 182 is attached to the outer surface of the static component 160); Curve L 93 This represents the force curve of the dynamic component 170 during its movement when the second magnet 182 is embedded in the static component 160 by a size of 0.30 mm; curve L 94 This represents the force curve of the dynamic component 170 during its movement when the second magnet 182 is embedded in the static component 160 with a dimension of 0.40 mm; curve L 95This represents the force curve of the dynamic component 170 during its movement when the second magnet 182 is embedded in the static component 160 by a size of 0.50 mm; curve L 96 This represents the force curve of the dynamic component 170 during its movement when the second magnet 182 is embedded in the static component 160 by a size of 0.55 mm; curve L 97 The force curve of the dynamic component 170 during its movement is shown when the second magnet 182 is embedded in the static component 160 by a size of 0.60 mm (i.e., the second magnet 182 just penetrates the static component 160 but does not protrude from the inner wall of the static component 160).

[0068] Please refer to curve L. 81 With curve L 91 The left half of the curve L 91 Compared to curve L 81 The upward shift is obvious. This indicates that, with the size of the second magnet 182 remaining unchanged, as the thickness of the static component 160 in the second direction Y increases, the force exerted by the first magnetic circuit assembly 140 (static component 160) on the dynamic component 170 increases. That is, the second restoring force of the first magnetic circuit assembly 140 and the spring assembly 150 on the dynamic component 170 increases, the vibration performance of the dynamic component 170 decreases, the driving force of the transducer 120 decreases, the F0 characteristic of the transducer 120 increases, and the output performance of the loudspeaker 100 decreases.

[0069] Please refer to curve L. 91 With curve L 92 Curve L 93 Curve L 94 Curve L 95 Curve L 96 The left half, compared to curve L without the second magnet 182. 91 The curve L of the second magnet 182 was set. 92 -Curve L 96 The overall downward shift indicates that the second magnet 182 can effectively counteract the restoring force provided by the spring assembly 150 and the first magnetic circuit assembly 140 to the dynamic component 170, thereby enhancing the vibration performance of the dynamic component 170, increasing the driving force of the transducer 120, reducing the F0 characteristic of the transducer 120, and improving the output performance of the speaker 100.

[0070] Please refer to Figure 7, where curve L... 81 With curve L in Figure 5 81 Corresponding; Curve L 101 This represents the force curve of the dynamic component 170 during its movement when the second magnet 182 is not installed; curve L 102This represents the force curve of the dynamic component 170 during movement when the second magnet 182 is embedded in the static component 160 with a dimension of 0 mm (i.e., the second magnet 182 is attached to the outer surface of the static component 160); Curve L 103 This represents the force curve of the dynamic component 170 during its movement when the second magnet 182 is embedded in the static component 160 by a size of 0.30 mm; curve L 104 This represents the force curve of the dynamic component 170 during its movement when the second magnet 182 is embedded in the static component 160 with a dimension of 0.40 mm; curve L 105 This represents the force curve of the dynamic component 170 during its movement when the second magnet 182 is embedded in the static component 160 by a size of 0.55 mm; curve L 106 This represents the force curve of the dynamic component 170 during movement when the second magnet 182 is embedded in the static component 160 by a dimension of 0.60 mm (i.e., the second magnet 182 just penetrates the static component 160 but does not protrude from the inner wall of the static component 160). Curve L... 91 With curve L 101 Both represent the force curves of the dynamic component 170 during movement when the static component 160 has a thickness of 0.6 mm in the second direction Y and no second magnet 182 is provided. That is, curve L 91 With curve L 101 They are the same curve.

[0071] Please refer to curve L. 101 With curve L 102 Curve L 103 Curve L 104 Curve L 105 Compared to the case without the second magnet 182, the curve L corresponding to the case with the second magnet 182 is... 102 Curve L 103 Curve L 104 Curve L 105In some sections, the x-coordinate and y-coordinate of a point have the same sign. This means that when the dynamic component 170 moves within the corresponding distance range of that section, the direction of the force acting on the dynamic component 170 is the same as the direction of movement. However, the direction of the resultant force acting on the dynamic component 170 deviates from the equilibrium position. In this case, the first magnetic circuit assembly 140 and the auxiliary magnetic circuit assembly 180 work together to provide a compensating force that causes the dynamic component 170 to deviate from its equilibrium position, significantly enhancing the vibration capability of the dynamic component 170. Furthermore, as the thickness of the second magnet 182 increases in the first direction X, the force exerted by the second magnet 182 on the dynamic component 170 increases. This gradually enhances the counteracting effect of the restoring force provided by the spring assembly 150 and the first magnetic circuit assembly 140 on the dynamic component 170, thereby enhancing the vibration performance of the dynamic component 170, increasing the driving force of the transducer 120, and improving the output performance of the speaker 100.

[0072] In summary, when the thickness of the static component 160 in the second direction Y decreases, the size of the second magnet 182 increases, and the size of the second magnet 182 embedded in the static component 160 increases (without penetrating the static component 160), the vibration capability of the dynamic component 170 is enhanced, the driving force of the transducer 120 is increased, the F0 characteristic of the transducer 120 is reduced, and the output performance of the loudspeaker 100 is improved. In some embodiments, to ensure the output performance of the loudspeaker 100, the ratio of the size of the second magnet 182 embedded in the static component 160 to the thickness of the static component 160 in the second direction Y can be 0.01-0.95, and the ratio can be 0.6-2. In other embodiments, to improve the output performance of the loudspeaker 100, the ratio can also be 0.5-1. It should be noted that the aforementioned thickness dimension of the static component 160 in the second direction Y refers to the thickness of the sidewall of the static component 160 in the second direction Y, rather than the overall dimension of the static component 160 in the second direction Y. In some embodiments, the aforementioned thickness dimension of the static component 160 in the second direction Y may refer to the thickness of the area on the sidewall of the static component 160 where the groove structure is provided.

[0073] Figure 8 is a schematic diagram of the structure of a static component according to some embodiments of this specification. As shown in Figure 8, in some embodiments, the cross-sectional shape of the static component 160 along the first direction X can be racetrack-shaped or rectangular, and the cross-sectional shape of the static component 160 can include two long side portions and two short side portions. In some embodiments, the second magnet 182 can include at least two sub-magnets 182-1, which can be respectively disposed on the outer periphery of the static component 160 away from the dynamic component 170, and at least two sub-magnets 182-1 can be respectively disposed on opposite sides of the static component 160. For example, at least two sub-magnets 182-1 can be respectively disposed on the outer periphery of the two long sides of the cross-sectional shape of the static component 160. The forces exerted by the two sub-magnets 182-1 on the dynamic component 170 in the second direction Y can cancel each other out, thereby minimizing the movement of the dynamic component 170 in the second direction Y. By adopting the above configuration, the overall weight of the transducer 120 can be reduced while the second magnet 182 has a stronger magnetism, thereby improving the output performance of the speaker 100. In some other embodiments, the second magnet 182 may also include four sub-magnets 182-1 (not shown in the figure). The four sub-magnets 182-1 can be respectively disposed on the outer surfaces corresponding to the two long sides and two short sides of the static component 160, thereby further enhancing the magnetism of the second magnet 182 and improving the output performance of the speaker 100.

[0074] Figure 9 is another structural schematic diagram of the transducer device according to some embodiments of this specification. Referring to Figure 9, in some embodiments, the dynamic component 170 may include a magnetic guide plate 121 disposed on the surface of the first magnet 171 along the first direction X. The auxiliary magnetic circuit assembly 180 further includes a third magnet 183, with the second magnet 182 and the third magnet 183 spaced apart in the first direction X, and located on opposite sides of the magnetic guide plate 121 in the first direction X. The polarity between the surface of the first magnet 171 facing the magnetic guide plate 121 along the first direction X and the surface of the second magnet 182 facing the dynamic component 170 along the second direction Y is opposite, and the second magnet 182 and the first magnet 171 attract each other; the polarity between the surface of the first magnet 171 facing the magnetic guide plate 121 along the first direction X and the surface of the third magnet 183 facing the dynamic component 170 along the second direction Y is opposite, and the third magnet 183 and the first magnet 171 attract each other. For example, as shown in FIG9, the magnetic plate 121 is disposed on the upper side of the first magnet 171 along the first direction X. The upper side of the first magnet 171 is the N pole, the surface of the second magnet 182 facing the dynamic component 170 along the second direction Y is the S pole, and the surface of the third magnet 183 facing the dynamic component 170 along the second direction Y is the S pole. It should be noted that the size and arrangement of the third magnet 183 are the same as or similar to the size and arrangement of the second magnet 182. For example, the third magnet 183 may also include at least two sub-magnets, which are respectively disposed on opposite sides of the peripheral side of the static component 160; the depth of the third magnet 183 embedded in the corresponding groove structure may be the same as the depth of the second magnet 182 embedded in the corresponding groove structure; in the equilibrium state, the distance between the centerline surface C6 of the third magnet 183 parallel to the second direction Y and the centerline surface C2 of the corresponding first magnetic plate 121 parallel to the second direction Y in the first direction X may also be a first distance d2, etc. For more details, please refer to the relevant instructions for the second magnet 182; further details will not be provided here.

[0075] When the dynamic component 170 is in the equilibrium position, the direction of the attraction between the second magnet 182 and the upper side of the first magnet 171 is upward along the first direction X, and the direction of the attraction between the third magnet 183 and the upper side of the first magnet 171 is downward along the first direction X. The distances from the second magnet 182 and the third magnet 183 to the upper side of the first magnet 171 are similar. That is, the force exerted by the second magnet 182 on the dynamic component 170 and the force exerted by the third magnet 183 on the dynamic component 170 can cancel each other out, keeping the dynamic component 170 in the equilibrium position.

[0076] Figures 10A and 10B are schematic diagrams showing the positions of dynamic components according to some embodiments of this specification.

[0077] Please refer to Figures 9 and 10A. In Figure 9, the dynamic component 170 is in an equilibrium position. When the dynamic component 170 moves downward relative to the static component 160 in the first direction X, as shown in Figure 10A, the distance between the upper surfaces of the second magnet 182 and the first magnet 171 in the first direction X increases, while the distance between the upper surfaces of the third magnet 183 and the first magnet 171 in the first direction X decreases. The force exerted by the second magnet 182 on the dynamic component 170 decreases, while the force exerted by the third magnet 183 on the dynamic component 170 increases. Since the direction of the force exerted by the second magnet 182 on the dynamic component 170 is upward along the first direction X, and the direction of the force exerted by the third magnet 183 on the dynamic component 170 is downward along the first direction X, the same as the direction of movement of the dynamic component 170, pointing away from the equilibrium position.

[0078] Please refer to Figures 9 and 10B. In Figure 9, the dynamic component 170 is in an equilibrium position. When the dynamic component 170 moves upward relative to the static component 160 in the first direction X, as shown in Figure 10B, the distance between the upper surfaces of the second magnet 182 and the first magnet 171 in the first direction X decreases, while the distance between the upper surfaces of the third magnet 183 and the first magnet 171 in the first direction X increases. The force exerted by the second magnet 182 on the dynamic component 170 increases, while the force exerted by the third magnet 183 on the dynamic component 170 decreases. Since the direction of the force exerted by the second magnet 182 on the dynamic component 170 is upward along the first direction X, and the direction of the force exerted by the third magnet 183 on the dynamic component 170 is downward along the first direction X, the direction of the resultant force of the second magnet 182 and the third magnet 183 on the dynamic component 170 is upward along the first direction X, the same as the direction of movement of the dynamic component 170, pointing away from the equilibrium position.

[0079] It should be noted that, during the movement of the dynamic component 170, the force exerted by the spring assembly 150 on the dynamic component 170 is related to Figures 3A and 3B and their related descriptions above, and will not be repeated here.

[0080] In some embodiments, when the spring assembly 150 includes only one vibrating plate, the first magnetic circuit assembly 140 may include only one magnetic plate 121, and the voice coil assembly 130 may include only one corresponding voice coil. In some embodiments, when the spring assembly 150 includes two vibrating plates (e.g., a first vibrating plate and a second vibrating plate), the first vibrating plate is connected to a first end of the dynamic component 170 along the first direction X, and the second vibrating plate is connected to a second end of the dynamic component 170 along the first direction X, wherein the first end and the second end are respectively the two ends of the dynamic component 170 along the first direction X; the dynamic component 170 may include a first magnetic plate 121-1 and a second magnetic plate 121-2, the first vibrating plate connects the first magnetic plate 121-1 to the static component 160, and the second vibrating plate connects the second magnetic plate 121-2 to the static component 160; the voice coil assembly 130 includes a first voice coil and a second voice coil, the first voice coil being at least partially located in the magnetic gap region corresponding to the first end of the dynamic component 170 along the first direction X, and the second voice coil being at least partially located in the magnetic gap region corresponding to the second end of the dynamic component 170 along the first direction X. For specific structural details, please refer to the description related to FIG1 above, which will not be repeated here.

[0081] Referring to Figure 2B, in some embodiments, the auxiliary magnetic circuit assembly 180 further includes a fourth magnet 184. The surface of the first magnet 171 facing the first magnetic guide plate 121-1 along the first direction X and the surface of the second magnet 182 facing the dynamic component 170 along the second direction Y have the same polarity. The surface of the first magnet 171 facing the second magnetic guide plate 121-2 along the first direction X and the surface of the fourth magnet 184 facing the dynamic component 170 along the second direction Y have the same polarity. For example, as shown in Figure 2B, the first magnetic guide plate 121-1 is disposed on the upper side of the first magnet 171 along the first direction X, and the upper side of the first magnet 171 is the N pole. The surface of the second magnet 182 facing the dynamic component 170 along the second direction Y is the N pole. The second magnetic guide plate 121-2 is disposed on the lower side of the first magnet 171 along the first direction X, and the lower side of the first magnet 171 is the S pole. The surface of the fourth magnet 184 facing the dynamic component 170 along the second direction Y is the S pole. It should be noted that the fourth magnet 184 has the same dimensions as the second magnet 182; the fourth magnet 184 is also positioned in the same way as the second magnet 182, located on the outer periphery of the static component 160 away from the dynamic component 170 (e.g., attached to or embedded in a corresponding groove structure); and the depth to which the fourth magnet 184 is embedded in the corresponding groove structure can be the same as the depth to which the second magnet 182 is embedded in the corresponding groove structure. For more information on the fourth magnet 184, please refer to the relevant description of the second magnet 182; further details will not be elaborated upon here.

[0082] Referring to Figure 2B, when the dynamic component 170 is in the equilibrium position, the direction of the repulsive force of the second magnet 182 on the upper side of the first magnet 171 and the repulsive force of the fourth magnet 184 on the lower side of the first magnet 171 can cancel each other out, so that the dynamic component 170 is maintained in the equilibrium position.

[0083] Referring to Figures 2B and 3A, when the dynamic component 170 moves downward relative to the static component 160 in the first direction X, as shown in Figure 3A, the upper surfaces of the second magnet 182 and the first magnet 171 are closer in the first direction X, while the lower surfaces of the second magnet 182 and the first magnet 171 are farther apart in the first direction X. The force exerted by the second magnet 182 on the first magnet 171 is mainly a repulsive force exerted by the second magnet 182 on the upper surface of the first magnet 171, and the direction of this repulsive force is downward along the first direction X. Similarly, the lower surface of the fourth magnet 184 is closer to the first magnet 171 in the first direction X, while the upper surface of the fourth magnet 184 is farther apart in the first direction X. The force exerted by the fourth magnet 184 on the first magnet 171 is mainly a repulsive force exerted by the fourth magnet 184 on the lower surface of the first magnet 171, and the direction of this repulsive force is downward along the first direction X. In summary, the direction of the resultant force of the second magnet 182 and the fourth magnet 184 on the dynamic component 170 is downward along the first direction X, which is the same as the direction of movement of the dynamic component 170. That is, the second magnet 182 and the fourth magnet 184 together provide the dynamic component 170 with a force that deviates from the equilibrium position.

[0084] Referring to Figures 2B and 3B, when the dynamic component 170 moves upward relative to the static component 160 in the first direction X, as shown in Figure 3B, the upper surface of the second magnet 182 is closer to the upper surface of the first magnet 171 in the first direction X, while the lower surface of the second magnet 182 is farther from the lower surface of the first magnet 171 in the first direction X. The force exerted by the second magnet 182 on the first magnet 171 is mainly a repulsive force exerted by the second magnet 182 on the upper surface of the first magnet 171, and the direction of this repulsive force is upward along the first direction X. Similarly, the lower surface of the fourth magnet 184 is closer to the lower surface of the first magnet 171 in the first direction X, while the upper surface of the fourth magnet 184 is farther from the upper surface of the first magnet 171 in the first direction X. The force exerted by the fourth magnet 184 on the first magnet 171 is mainly a repulsive force exerted by the fourth magnet 184 on the lower surface of the first magnet 171, and the direction of this repulsive force is upward along the first direction X. In summary, the direction of the resultant force of the second magnet 182 and the fourth magnet 184 on the dynamic component 170 is upward along the first direction X, which is the same as the direction of movement of the dynamic component 170. That is, the second magnet 182 and the fourth magnet 184 together provide the dynamic component 170 with a force that deviates from the equilibrium position.

[0085] Taking into account the movement distance of the dynamic component 170 relative to the equilibrium position in the first direction X, and for structural design considerations, to avoid the transducer 120 becoming too large, the placement position of the second magnet 182 needs to be designed. In some embodiments, at the equilibrium position, the distance (e.g., d2) between the centerline surface C2 of the first magnetic plate 121-1 parallel to the second direction Y and the centerline surface C1 of the second magnet 182 parallel to the second direction Y in the first direction X is not greater than 0.8 mm, and the distance between the centerline surface C4 of the second magnetic plate 121-2 parallel to the second direction Y and the centerline surface C3 of the fourth magnet 184 parallel to the second direction Y in the first direction X is not greater than 0.8 mm, so as to ensure mutual repulsion between the second magnet 182, the fourth magnet 184 and the first magnet 171, and to avoid the second magnet 182, the fourth magnet 184 and the first magnet 171 being too far apart.

[0086] In some embodiments, in order to allow the force provided by the auxiliary magnetic circuit assembly 180 to the dynamic component 170 to be flexibly adjusted, the placement position of the auxiliary magnetic circuit assembly 180 can be designed.

[0087] Figures 11A and 11B are another structural schematic diagram of the transducer device shown according to some embodiments of this specification.

[0088] Referring to Figures 11A and 11B, in some embodiments, at the equilibrium position, the distance between the centerline plane C2 of the first magnetic plate 121-1 parallel to the second direction Y and the centerline plane C1 of the second magnet 182 parallel to the second direction Y in the first direction X is 0mm-0.1mm, and the distance between the centerline plane C4 of the second magnetic plate 121-2 parallel to the second direction Y and the centerline plane C3 of the fourth magnet 184 parallel to the second direction Y in the first direction X is 0.1mm-0.8mm. That is, the center plane C2 of the first magnetic plate 121-1 and the center plane C1 of the second magnet 182 can coincide or nearly coincide in the first direction X, the center plane C4 of the second magnetic plate 121-1 and the center plane C3 of the fourth magnet 184 can be offset in the first direction X, and the fourth magnet 184 can be offset upward relative to the second magnetic plate 121-1 in the first direction X (as shown in Figure 11A) or offset downward relative to the second magnetic plate 121-1 (as shown in Figure 11B).

[0089] The following description uses the fourth magnet 184 shown in Figures 11A and 11B as an example to illustrate the relative position design of the magnet of the auxiliary magnetic circuit assembly 180 and the corresponding magnetic guide plate 121 of the dynamic component 170, except that they are flush.

[0090] In some embodiments, in the equilibrium position, the magnets of the auxiliary magnetic circuit assembly 180 can be located between the centerline surface C4 of the second magnetic guide plate 121-2 and the centerline surface C2 of the first magnetic guide plate 121-1 in the first direction X. For example, as shown in FIG11A, in the equilibrium position, when the centerline surface C3 of the fourth magnet 184 is located on the side of the centerline surface C4 of the second magnetic guide plate 121-2 facing the first magnet 171 (i.e., between the centerline surface C4 of the second magnetic guide plate 121-2 and the centerline surface C2 of the first magnetic guide plate 121-1), if the distance between the centerline surface C3 of the fourth magnet 184 and the corresponding centerline surface C4 of the second magnetic guide plate 121-2 in the first direction X is too large, it will cause the fourth magnet 184 and the second magnet 182 to be too close in the first direction X, which may affect the effect of the second magnet 182 on the first magnetic guide plate 121-1, affect the compensation force provided by the auxiliary magnetic circuit assembly 180, and affect the vibration effect of the dynamic component 170.

[0091] In some embodiments, at the equilibrium position, the magnets of the auxiliary magnetic circuit assembly 180 are offset from the dynamic component 170 in the first direction X. For example, as shown in FIG11B, at the equilibrium position, the center plane C3 of the fourth magnet 184 is located on the side of the center plane C4 of the second magnetic plate 121-2 away from the first magnet 171. To ensure that the auxiliary magnetic circuit assembly 180 provides a compensating force to cause the dynamic component 170 to deviate from the equilibrium position, the distance between the magnets of the auxiliary magnetic circuit assembly 180 and the dynamic component 170 in the first direction X should not be too large at the equilibrium position. During the downward vibration of the dynamic component 170 from the equilibrium position along the first direction X, the downward repulsive force provided by the second magnet 182 gradually decreases, while the repulsive force provided by the fourth magnet 184 first gradually increases and then gradually decreases. As the repulsive force provided by the fourth magnet 184 gradually increases, the direction of the repulsive force provided by the fourth magnet 184 is upward; as the repulsive force provided by the fourth magnet 184 gradually decreases, the direction of the repulsive force provided by the fourth magnet 184 is downward; when the repulsive force provided by the fourth magnet 184 is at its maximum, the centerline surface C3 of the fourth magnet 184 is flush with the centerline surface C4 of the second magnetic plate 121-2. If the distance between the centerline surface C3 of the fourth magnet 184 and the corresponding centerline surface C4 of the second magnetic plate 121-2 in the first direction X is too large, when the dynamic component 170 vibrates downward along the first direction X from its equilibrium position until the centerline surface C3 of the fourth magnet 184 is flush with the centerline surface C4 of the second magnetic plate 121-2, the downward repulsive force provided by the second magnet 182 is too small, and the upward resultant force provided by the second magnet 182 and the fourth magnet 184 is too large, affecting the vibration effect of the dynamic component 170.

[0092] To ensure the vibration effect of the dynamic component 170, when the magnet of the auxiliary magnetic circuit assembly 180 is offset from the dynamic component 170 in the first direction X at the equilibrium position (e.g., the fourth magnet 184 shown in Figures 11A and 11B), the distance between the magnet and the corresponding magnetic guide plate in the first direction X can be 0.1mm-0.4mm. For example, the distance between the centerline surface C3 of the fourth magnet 184 shown in Figures 11A and 11B and the centerline surface C4 of the corresponding second magnetic guide plate 121-2 in the first direction X is 0.1mm-0.4mm. It should be noted that in some embodiments, the aforementioned distance range is related to the maximum displacement of the dynamic component 170 relative to the equilibrium position. For example, referring to Figure 11B, when the maximum displacement of the dynamic component 170 relative to the equilibrium position is 0.8 mm, when the centerline surface C3 of the fourth magnet 184 is located on the side of the centerline surface C4 of the second magnetic plate 121-2 away from the first magnet 171 at the equilibrium position, the maximum distance between the centerline surface C3 of the fourth magnet 184 and the corresponding centerline surface C4 of the second magnetic plate 121-2 in the first direction X can be 0.4 mm.

[0093] In some embodiments, at the equilibrium position, the distance between the centerline surface C2 of the first magnetic plate 121-1 parallel to the second direction Y and the centerline surface C1 of the second magnet 182 parallel to the second direction Y in the first direction X is 0 mm, and the distance between the centerline surface C4 of the second magnetic plate 121-2 parallel to the second direction Y and the centerline surface C3 of the fourth magnet 184 parallel to the second direction Y in the first direction X is 0.1 mm to 0.4 mm.

[0094] In other embodiments, the first magnetic plate 121-1 and the second magnet 182 may be offset upwards or downwards in the first direction X, and the second magnetic plate 121-2 and the fourth magnet 184 may be flush or nearly flush. That is, in the equilibrium position, the distance between the centerline plane C4 of the second magnetic plate 121-2 parallel to the second direction Y and the centerline plane C3 of the fourth magnet 184 parallel to the second direction Y in the first direction X is 0mm-0.1mm, and the distance between the centerline plane C2 of the first magnetic plate 121-1 parallel to the second direction Y and the centerline plane C1 of the second magnet 182 parallel to the second direction Y in the first direction X is 0.1mm-0.8mm. In some embodiments, at the equilibrium position, the distance between the centerline plane C4 of the second magnetic plate 121-2 parallel to the second direction Y and the centerline plane C3 of the fourth magnet 184 parallel to the second direction Y in the first direction X is 0 mm, and the distance between the centerline plane C2 of the first magnetic plate 121-1 parallel to the second direction Y and the centerline plane C1 of the second magnet 182 parallel to the second direction Y in the first direction X is 0.1 mm to 0.4 mm.

[0095] Figures 12A and 12B are another structural schematic diagram of the transducer device shown according to some embodiments of this specification.

[0096] Referring to Figure 12A, in some embodiments, in the first direction X, the centerline plane C1 of the second magnet 182 parallel to the second direction Y is located between the centerline plane C2 of the first magnetic plate 121-1 parallel to the second direction Y and the centerline plane C5 of the first magnet 182 parallel to the second direction Y. Similarly, the centerline plane C1 of the fourth magnet 184 parallel to the second direction Y is located between the centerline plane C2 of the second magnetic plate 121-2 parallel to the second direction Y and the centerline plane C5 of the first magnet 182 parallel to the second direction Y. That is, the second magnet 182 and the fourth magnet 184 are offset in opposite directions, respectively offset inwards from the first magnet 171 in the first direction X.

[0097] Referring to Figure 12B, in some embodiments, in the first direction X, the second magnet 182, with its centerline surface C1 parallel to the second direction Y, is located on the side of the first magnetic plate 121-1 parallel to the centerline surface C2 of the second direction Y, away from the first magnet 171. The fourth magnet 184, with its centerline surface C3 parallel to the second direction Y, is located on the side of the second magnetic plate 121-2 parallel to the centerline surface C4 of the second direction Y, away from the first magnet 171. That is, the second magnet 182 and the fourth magnet 184 are offset in opposite directions, respectively offset outwards relative to the first magnet 171 in the first direction X.

[0098] In some embodiments, at the equilibrium position, the distance between the centerline plane C4 of the second magnetic plate 121-2 parallel to the second direction Y and the centerline plane C3 of the fourth magnet 184 parallel to the second direction Y in the first direction X is 0.1mm-0.4mm, and the distance between the centerline plane C2 of the first magnetic plate 121-1 parallel to the second direction Y and the centerline plane C1 of the second magnet 182 parallel to the second direction Y in the first direction X is 0.1mm-0.4mm.

[0099] It should be noted that, for the transducer 120 shown in Figures 12A and 12B, in order to make the direction of the resultant force of the second magnet 182 and the fourth magnet 184 on the dynamic component 170 the same as the direction of movement of the dynamic component 170, pointing away from the equilibrium position, the polarities of the surface of the first magnet 171 along the first direction X toward the first magnetic plate 121-1 and the surface of the second magnet 182 along the second direction Y toward the dynamic component 170 are opposite, and the polarities of the surface of the first magnet 171 along the first direction X toward the second magnetic plate 121-2 and the surface of the fourth magnet 184 along the second direction Y toward the dynamic component 170 are opposite.

[0100] Figures 13A and 13B are another structural schematic diagram of the transducer device shown according to some embodiments of this specification.

[0101] Referring to Figure 13A, in some embodiments, in the first direction X, the centerline plane C1 of the second magnet 182, parallel to the centerline plane C2 of the first magnetic plate 121-1, is located on the side opposite to the first magnet 171. The centerline plane C1 of the fourth magnet 184, parallel to the centerline plane C2 of the second magnetic plate 121-2, is located between the centerline plane C2 of the second magnetic plate 121-2 and the centerline plane C5 of the first magnet 182. That is, the second magnet 182 and the fourth magnet 184 are offset in the same direction, and both the second magnet 182 and the fourth magnet 184 are offset upwards in the first direction X.

[0102] Referring to Figure 13B, in some embodiments, in the first direction X, the centerline plane C1 of the second magnet 182 parallel to the second direction Y is located between the centerline plane C2 of the first magnetic plate 121-1 parallel to the second direction Y and the centerline plane C5 of the first magnet 182 parallel to the second direction Y. The centerline plane C3 of the fourth magnet 184 parallel to the second direction Y is located on the side of the second magnetic plate 121-2 parallel to the centerline plane C4 of the second direction Y, away from the first magnet 171. That is, the second magnet 182 and the fourth magnet 184 are offset in the same direction, and both the second magnet 182 and the fourth magnet 184 are offset downwards in the first direction X.

[0103] In some embodiments, at the equilibrium position, the distance between the centerline plane C4 of the second magnetic plate 121-2 parallel to the second direction Y and the centerline plane C3 of the fourth magnet 184 parallel to the second direction Y in the first direction X is 0.1mm-0.4mm, and the distance between the centerline plane C2 of the first magnetic plate 121-1 parallel to the second direction Y and the centerline plane C1 of the second magnet 182 parallel to the second direction Y in the first direction X is 0.1mm-0.4mm.

[0104] It should be noted that regarding the arrangement of the second magnet 182 and the fourth magnet 184 mentioned in Figures 11A-13B, in the equilibrium position, when the magnet is located between the centerline plane C2 of the first magnetic plate 121-1 and the centerline plane C4 of the second magnetic plate 121-2, the position design of the magnet can refer to the arrangement design of the fourth magnet 184 shown in Figure 11A. In the equilibrium position, when the magnet is offset from the dynamic component 170 in the first direction X, the position design of the magnet can refer to the arrangement design of the fourth magnet 184 shown in Figure 11B.

[0105] Referring to Figure 9, in some embodiments, the auxiliary magnetic circuit assembly 180 further includes a third magnet 183. The second magnet 182 and the third magnet 183 are spaced apart in the first direction X, and in the first direction X, the second magnet 182 and the third magnet 183 are respectively located on both sides of the first magnetic conductive plate 121-1. Furthermore, in the first direction X, the centerline plane C1 of the second magnet 182 parallel to the centerline plane C6 of the third magnet 183 parallel to the centerline plane C5 of the first magnet 171 parallel to the centerline plane C5 of the first magnet 171 facing the first magnetic conductive plate 121-1.

[0106] The surface of the first magnet 171 facing the first magnetic plate 121-1 along the first direction X has opposite polarities to the surface of the second magnet 182 facing the dynamic component 170 along the second direction Y, and the second magnet 182 and the first magnet 171 attract each other. The surface of the first magnet 171 facing the first magnetic plate 121-1 along the first direction X has opposite polarities to the surface of the third magnet 183 facing the dynamic component 170 along the second direction Y, and the third magnet 183 and the first magnet 171 attract each other. In some embodiments, the auxiliary magnetic circuit assembly 180 further includes a fifth magnet 185. The fourth magnet 184 and the fifth magnet 185 are spaced apart in the first direction X, and in the first direction X, the fourth magnet 184 and the fifth magnet 185 are respectively located on both sides of the second magnetic plate 121-2. Furthermore, in the first direction X, the centerline plane C3 of the fourth magnet 184 parallel to the second direction Y and the centerline plane C7 of the fifth magnet 185 parallel to the second direction Y are both located on the side of the first magnet 171 parallel to the centerline plane C5 of the second direction Y facing the second magnetic plate 121-2.

[0107] The surface of the first magnet 171 facing the second magnetic plate 121-2 along the first direction X has opposite polarities to the surface of the fourth magnet 184 facing the dynamic component 170 along the second direction Y, and the fourth magnet 184 and the first magnet 171 attract each other; the surface of the first magnet 171 facing the second magnetic plate 121-2 along the first direction X has opposite polarities to the surface of the fifth magnet 185 facing the dynamic component 170 along the second direction Y, and the fifth magnet 185 and the first magnet 171 attract each other.

[0108] Referring to Figure 9, when the dynamic component 170 is in the equilibrium position, the direction of the attraction between the second magnet 182 and the upper side of the first magnet 171 is upward along the first direction X, and the direction of the attraction between the third magnet 183 and the upper side of the first magnet 171 is downward along the first direction X. The forces exerted by the second magnet 182 and the third magnet 183 on the dynamic component 170 can cancel each other out. The direction of the attraction between the fourth magnet 184 and the lower side of the first magnet 171 is upward along the first direction X, and the direction of the attraction between the fifth magnet 185 and the lower side of the first magnet 171 is downward along the first direction X. The forces exerted by the fourth magnet 184 and the fifth magnet 185 on the dynamic component 170 can cancel each other out. This maintains the dynamic component 170 in the equilibrium position.

[0109] Referring to Figures 9 and 10A, when the dynamic component 170 moves downward relative to the static component 160 in the first direction X, as shown in Figure 10A, the distance between the upper surfaces of the second magnet 182 and the first magnet 171 increases, while the distance between the upper surfaces of the third magnet 183 and the first magnet 171 decreases. The force exerted by the second magnet 182 on the dynamic component 170 decreases, while the force exerted by the third magnet 183 on the dynamic component 170 increases. Since the direction of the force exerted by the second magnet 182 on the dynamic component 170 is upward along the first direction X, and the direction of the force exerted by the third magnet 183 on the dynamic component 170 is downward along the first direction X, the direction of the resultant force of the second magnet 182 and the third magnet 183 on the dynamic component 170 is downward along the first direction X, the same as the direction of movement of the dynamic component 170, pointing away from the equilibrium position. When the dynamic component 170 moves downward relative to the static component 160 in the first direction X, as shown in Figure 10A, the distance between the lower surfaces of the fourth magnet 184 and the first magnet 171 increases, while the distance between the lower surfaces of the fifth magnet 185 and the first magnet 171 decreases. The force exerted by the fourth magnet 184 on the dynamic component 170 decreases, while the force exerted by the fifth magnet 185 on the dynamic component 170 increases. Since the direction of the force exerted by the fourth magnet 184 on the dynamic component 170 is upward along the first direction X, and the direction of the force exerted by the fifth magnet 185 on the dynamic component 170 is downward along the first direction X, the resultant force exerted by the fourth magnet 184 and the fifth magnet 185 on the dynamic component 170 is downward along the first direction X, the same as the direction of movement of the dynamic component 170, pointing in a direction away from the equilibrium position. In summary, the auxiliary magnetic circuit assembly 180 provides the dynamic component 170 with a force pointing away from the equilibrium position.

[0110] Referring to Figures 9 and 10B, when the dynamic component 170 moves upward relative to the static component 160 in the first direction X, as shown in Figure 10B, the distance between the upper surfaces of the second magnet 182 and the first magnet 171 decreases, while the distance between the upper surfaces of the third magnet 183 and the first magnet 171 increases. The force exerted by the second magnet 182 on the dynamic component 170 increases, while the force exerted by the third magnet 183 on the dynamic component 170 decreases. Since the direction of the force exerted by the second magnet 182 on the dynamic component 170 is upward along the first direction X, and the direction of the force exerted by the third magnet 183 on the dynamic component 170 is downward along the first direction X, the direction of the resultant force of the second magnet 182 and the third magnet 183 on the dynamic component 170 is upward along the first direction X, the same as the direction of movement of the dynamic component 170, pointing in a direction away from the equilibrium position. When the dynamic component 170 moves upward relative to the static component 160 in the first direction X, as shown in Figure 10B, the distance between the lower surfaces of the fourth magnet 184 and the first magnet 171 decreases, while the distance between the fifth magnet 185 and the lower surfaces of the first magnet 171 increases. The force exerted by the fourth magnet 184 on the dynamic component 170 increases, while the force exerted by the fifth magnet 185 on the dynamic component 170 decreases. Since the direction of the force exerted by the fourth magnet 184 on the dynamic component 170 is upward along the first direction X, and the direction of the force exerted by the fifth magnet 185 on the dynamic component 170 is downward along the first direction X, the resultant force exerted by the fourth magnet 184 and the fifth magnet 185 on the dynamic component 170 is upward along the first direction X, the same as the direction of movement of the dynamic component 170, pointing in a direction away from the equilibrium position. In summary, the auxiliary magnetic circuit assembly 180 provides the dynamic component 170 with a force pointing away from the equilibrium position.

[0111] Figure 14A is another structural schematic diagram of a transducer device according to some embodiments of this specification.

[0112] Referring to Figure 14A, in some embodiments, the auxiliary magnetic circuit assembly 180 includes a second magnet 182 and a third magnet 183. The second magnet 182 and the first magnetic conductive plate 121-1 are spaced apart along a first direction X, and the third magnet 183 and the second magnetic conductive plate 121-2 are spaced apart along the first direction X. In some embodiments, the second magnet 182 and the third magnet 183 may be disposed on the housing 110. The polarity of the surface of the first magnet 171 facing the first magnetic conductive plate 121-1 is opposite to that of the surface of the second magnet 182 facing the first magnetic conductive plate 121-1 along the first direction X, and the polarity of the surface of the first magnet 171 facing the second magnetic conductive plate 121-2 is opposite to that of the surface of the third magnet 183 facing the second magnetic conductive plate 121-2 along the first direction X. For example, as shown in FIG14A, a first magnetic plate 121-1 is disposed on the upper side of the first magnet 171 along the first direction X, and a second magnetic plate 121-2 is disposed on the lower side of the first magnet 171 along the first direction X. The upper side of the first magnet 171 is the N pole, the surface of the second magnet 182 facing the first magnetic plate 121-1 along the first direction X is the S pole; the lower side of the first magnet 171 is the S pole, and the surface of the third magnet 183 facing the second magnetic plate 121-2 along the first direction X is the N pole. At this time, the polarization direction of the second magnet 182 and / or the third magnet 183 is the same as or parallel to the polarization direction of the first magnet 171, wherein the aforementioned same or parallel includes approximately the same or approximately parallel.

[0113] It should be noted that the second magnet 182 and the third magnet 183 shown in Figure 14A can also be disposed on the side wall of the static component 160. For example, they can be disposed on the inner side wall of the static component 160, or they can be disposed on the outer side wall of the static component 160 in the same manner as the second magnet 182 and the fourth magnet 184 shown in Figure 12B. When the second magnet 182 and the third magnet 183 are disposed on the side wall of the static component 160, referring to the design of the relative positions of the fourth magnet 184 and the corresponding second magnetic plate 121-2 in Figure 11B, the distance between the centerline plane of the second magnet 182 parallel to the second direction Y and the centerline plane of the corresponding first magnetic plate 121-1 parallel to the second direction Y along the first direction X can be greater than or equal to 0.4 mm, and the distance between the centerline plane of the third magnet 183 parallel to the second direction Y and the centerline plane of the corresponding second magnetic plate 121-2 parallel to the second direction Y along the first direction X can be greater than or equal to 0.4 mm. Furthermore, taking into account the displacement amplitude of the dynamic component 170 relative to the equilibrium position and the size design of the transducer 120, when the second magnet 182 and the third magnet 183 are disposed on the side wall of the static component 160, the distance between the centerline plane of the second magnet 182 parallel to the second direction Y and the corresponding centerline plane of the first magnetic plate 121-1 parallel to the second direction Y along the first direction X can be less than or equal to 0.8mm, and the distance between the centerline plane of the third magnet 183 parallel to the second direction Y and the corresponding centerline plane of the second magnetic plate 121-2 parallel to the second direction Y along the first direction X can be less than or equal to 0.8mm.

[0114] When the dynamic component 170 is in the equilibrium position, the direction of the attraction between the second magnet 182 and the upper side of the first magnet 171 is upward along the first direction X, and the direction of the attraction between the third magnet 183 and the lower side of the first magnet 171 is downward along the first direction X. The force exerted by the second magnet 182 on the dynamic component 170 and the force exerted by the third magnet 183 on the dynamic component 170 can cancel each other out, so that the dynamic component 170 is maintained in the equilibrium position.

[0115] When the dynamic component 170 moves downward relative to the static component 160 in the first direction X, the distance between the upper surface of the second magnet 182 and the first magnet 171 increases, and the distance between the lower surface of the third magnet 183 and the first magnet 171 decreases. The force exerted by the second magnet 182 on the dynamic component 170 decreases, while the force exerted by the third magnet 183 on the dynamic component 170 increases. Since the direction of the force exerted by the second magnet 182 on the dynamic component 170 is upward along the first direction X, and the direction of the force exerted by the third magnet 183 on the dynamic component 170 is downward along the first direction X, the direction of the resultant force of the second magnet 182 and the third magnet 183 on the dynamic component 170 is downward along the first direction X, the same as the direction of movement of the dynamic component 170, pointing away from the equilibrium position.

[0116] When the dynamic component 170 moves upward relative to the static component 160 in the first direction X, the distance between the upper surfaces of the second magnet 182 and the first magnet 171 decreases, while the distance between the lower surfaces of the third magnet 183 and the first magnet 171 increases. The force exerted by the second magnet 182 on the dynamic component 170 increases, while the force exerted by the third magnet 183 on the dynamic component 170 decreases. Since the direction of the force exerted by the second magnet 182 on the dynamic component 170 is upward along the first direction X, and the direction of the force exerted by the third magnet 183 on the dynamic component 170 is downward along the first direction X, the direction of the resultant force of the second magnet 182 and the third magnet 183 on the dynamic component 170 is upward along the first direction X, the same as the direction of movement of the dynamic component 170, pointing in a direction away from the equilibrium position.

[0117] Figure 14B is another structural schematic diagram of a transducer device according to some embodiments of this specification.

[0118] Referring to Figure 14B, the difference between the transducer 120 shown in Figure 14B and the transducer 120 shown in Figure 14A is that the auxiliary magnetic circuit assembly 180 further includes a sixth magnet 186 and a seventh magnet 187. The sixth magnet 186 is disposed on the first magnetic guide plate 121-1, and the seventh magnet 187 is disposed on the second magnetic guide plate 121-2. The second magnet 182 and the sixth magnet 186 are spaced apart along the first direction X, and the third magnet 183 and the seventh magnet 187 are also spaced apart along the first direction X. The polarity between the surface of the sixth magnet 186 facing the second magnet 182 and the surface of the second magnet 182 facing the sixth magnet 186 is opposite, and the polarity between the surface of the seventh magnet 187 facing the third magnet 183 and the surface of the third magnet 183 facing the seventh magnet 187 is opposite. For example, as shown in FIG14B, the first magnetic plate 121-1 is disposed on the upper side of the first magnet 171 along the first direction X, and the second magnetic plate 121-2 is disposed on the lower side of the first magnet 171 along the first direction X. The surface of the sixth magnet 186 facing the second magnet 182 is the N pole, the surface of the second magnet 182 facing the sixth magnet 186 is the S pole, the surface of the seventh magnet 187 facing the third magnet 183 is the S pole, and the surface of the third magnet 183 facing the seventh magnet 187 is the N pole. The second magnet 182 and the sixth magnet 186 attract each other, and the third magnet 183 and the seventh magnet 187 attract each other. By setting the sixth magnet 186 and the seventh magnet 187, the attraction of the second magnet 182 and the third magnet 183 on the corresponding magnetic lines of force in the magnetic plates can be avoided, thus weakening the magnetic field strength at the voice coil assembly 130, thereby ensuring that the transducer 120 has a strong driving force and ensuring the output of the speaker 100.

[0119] The basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this specification. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this specification. Such modifications, improvements, and corrections are suggested in this specification and therefore remain within the spirit and scope of the exemplary embodiments described herein.

[0120] Furthermore, this specification uses specific terms to describe embodiments thereof. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of this specification. Therefore, it should be emphasized and noted that references to "an embodiment," "one embodiment," or "an alternative embodiment" in different locations throughout this specification do not necessarily refer to the same embodiment. Moreover, certain features, structures, or characteristics in one or more embodiments of this specification can be appropriately combined.

[0121] Similarly, it should be noted that, in order to simplify the description disclosed herein and thus aid in the understanding of one or more embodiments of the invention, the foregoing description of embodiments in this specification may sometimes combine multiple features into a single embodiment, drawing, or description thereof. However, this method of disclosure does not imply that the subject matter of this specification requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of a single embodiment disclosed above.

[0122] Finally, it should be understood that the embodiments described in this specification are merely illustrative of the principles of the embodiments described herein. Other variations may also fall within the scope of this specification. Therefore, alternative configurations of the embodiments described herein are intended to be illustrative rather than limiting, and are considered consistent with the teachings of this specification. Accordingly, the embodiments described herein are not limited to those explicitly introduced and described herein.

Claims

1. A transducer, comprising: A first magnetic circuit assembly includes a dynamic component and a static component, wherein the static component is disposed around the dynamic component, and the dynamic component includes a first magnet. A voice coil assembly, the voice coil assembly being fixed to the static component and at least partially located in the magnetic gap between the static component and the dynamic component, the dynamic component being movable relative to the voice coil assembly and the static component, the voice coil assembly comprising at least one voice coil; A spring assembly is configured to connect the dynamic component and the static component, and to allow the dynamic component to move relative to the static component in a first direction, the first direction being a direction parallel to the axis of the voice coil assembly; An auxiliary magnetic circuit assembly includes a second magnet and a third magnet, wherein along the first direction, the second magnet and the third magnet are respectively located on both sides of the first magnet; The dynamic component includes a first magnetic plate and a second magnetic plate, which are respectively located on two surfaces of the first magnet along the first direction. The polarity of the surface of the first magnet facing the first magnetic plate is opposite to that of the surface of the second magnet facing the first magnetic plate along the first direction. The polarity of the surface of the first magnet facing the second magnetic plate is opposite to that of the surface of the third magnet facing the second magnetic plate along the first direction.

2. The transducer as described in claim 1, wherein, In the first direction, the first magnetic plate is located between the second magnet and the first magnet, and the second magnetic plate is located between the third magnet and the first magnet; The second magnet and the first magnetic plate are spaced apart along the first direction, and the third magnet and the second magnetic plate are spaced apart along the first direction.

3. The transducer as described in claim 1, wherein, The polarization direction of the first magnetic circuit component is the same as or parallel to the polarization direction of the second magnet or the third magnet.

4. The transducer as described in claim 1, wherein, During the movement of the dynamic component relative to the static component, the spring assembly provides a restoring force to restore the dynamic component to its equilibrium position; the auxiliary magnetic circuit assembly interacts with the first magnetic circuit assembly to provide a compensating force to cause the dynamic component to deviate from the equilibrium position; the equilibrium position is the position of the dynamic component relative to the static component when the voice coil assembly is not energized.

5. The transducer as described in any one of claims 1-4, wherein, The voice coil assembly is attached to the inner surface of the static component facing the dynamic component; or, The inner side of the static component is provided with a stepped portion, and the voice coil assembly is disposed on the stepped portion.

6. The transducer as claimed in claim 1, wherein, The spring plate assembly includes a first vibration transmission plate and a second vibration transmission plate. The first vibration transmission plate is connected to a first end of the dynamic component along the first direction, and the second vibration transmission plate is connected to a second end of the dynamic component along the first direction. The voice coil assembly includes a first voice coil and a second voice coil, wherein the first voice coil is at least partially located in the magnetic gap region corresponding to the first end of the dynamic component along the first direction, and the second voice coil is at least partially located in the magnetic gap region corresponding to the second end of the dynamic component along the first direction.

7. The transducer as claimed in claim 6, wherein, The first and second transducers allow the dynamic component to vibrate relative to the static component, such that the transducer has at least one resonant peak in the frequency range of 100Hz-200Hz.

8. The transducer as claimed in claim 6, wherein, The auxiliary magnetic circuit assembly further includes a sixth magnet and a seventh magnet. The sixth magnet is disposed on the first magnetic guide plate, and the seventh magnet is disposed on the second magnetic guide plate. The second magnet and the sixth magnet are spaced apart along the first direction, and the third magnet and the seventh magnet are also spaced apart along the first direction. The polarity between the surface of the sixth magnet facing the second magnet and the surface of the second magnet facing the sixth magnet is opposite, and the polarity between the surface of the seventh magnet facing the third magnet and the surface of the third magnet facing the seventh magnet is opposite.

9. A transducer, comprising: A first magnetic circuit assembly includes a dynamic component and a static component, wherein the static component is disposed around the dynamic component, and the dynamic component includes a first magnet. A voice coil assembly, the voice coil assembly being fixed to the static component and at least partially located in the magnetic gap between the static component and the dynamic component, the dynamic component being movable relative to the voice coil assembly and the static component, the voice coil assembly comprising at least one voice coil; A spring assembly is configured to connect the dynamic component and the static component, and to allow the dynamic component to move relative to the static component in a first direction, the first direction being a direction parallel to the axis of the voice coil assembly; An auxiliary magnetic circuit assembly includes a second magnet and a third magnet, wherein the second magnet and the third magnet are disposed on the side wall of the static component; The dynamic component includes a first magnetic plate and a second magnetic plate, which are respectively located on two surfaces of the first magnet along the first direction. In the first direction, the first magnetic plate is located between the second magnet and the first magnet, and the second magnetic plate is located between the third magnet and the first magnet. The distance between the centerline plane of the second magnet parallel to the second direction and the centerline plane of the first magnetic plate parallel to the second direction in the first direction is 0.4mm-0.8mm; the distance between the centerline plane of the third magnet parallel to the second direction and the centerline plane of the first magnetic plate parallel to the second direction in the first direction is 0.4mm-0.8mm, where the second direction is perpendicular to the axis of the voice coil assembly.

10. The transducer as claimed in claim 9, wherein, The polarity of the surface of the first magnet facing the first magnetic plate is opposite to that of the surface of the second magnet facing the first magnetic plate along the first direction, and the polarity of the surface of the first magnet facing the second magnetic plate is opposite to that of the surface of the third magnet facing the second magnetic plate along the first direction.

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