Patent Application
20240406616
The present application relates to the technical field of sound generation devices, and in particular, to an acoustic output apparatus, an earphone and an ultra-linear multi-magnetic double-diaphragm loudspeaker.
With the development of the society, the application of acoustic output apparatuses such as earphones is becoming more and more widespread, and people's requirements for the sound quality and wearing comfort of the earphones are also increasing.
Open-type earphones in the related art have superior wearing comfort performance as the earphones do not extend into human ear canal.
A main object of the present application is to provide an acoustic output apparatus, an earphone and an ultra-linear multi-magnetic double-diaphragm loudspeaker, aiming to improve a bass performance of the acoustic output apparatus and the earphone, and to ensure linearity of frequency response of the ultra-linear multi-magnetic double-diaphragm loudspeaker.
In order to achieve the above object, in a first aspect, the present application provides an acoustic output apparatus, including:
In a second aspect, the present application further provides an earphone, including an acoustic output apparatus, where the acoustic output apparatus includes:
According to a third aspect, the present application provides an ultra-linear multi-magnetic double-diaphragm loudspeaker, including a support, where a second copper ring is provided inside the support, a first copper ring is provided on an upper surface of the support, a composite diaphragm is provided on one side of the first copper ring and a composite membrane is provided inside the support.
To make the purposes, technical solutions, and advantages of the present application clearer, the following is a further detailed explanation of this application with reference to the accompanying drawings and specific embodiments.
The following will provide a clear and complete description of the technical solutions in the embodiments of the present application with reference to
The embodiments of the present application provide an acoustic output apparatus and an earphone, and the earphone may include the acoustic output apparatus. When the acoustic output apparatus or the earphone is worn an ear of a human body, the acoustic output apparatus and the earphone may transmit an acoustic signal to the ear. The acoustic output apparatus and the earphone provided in the embodiments of the present application have excellent bass performance, and can solve the problem of insufficient bass of an earphone in the related art. This will be described thereinafter with reference to the accompanying drawings.
Referring to
The electroacoustic transducer 110 includes a first diaphragm 111 and a driving component 112, where the first diaphragm 111 is provided on a first side of the driving component 112 and is connected to the driving component 112. The second diaphragm 120 is provided on a second side of the driving component 112 opposite to the first side, and the second diaphragm 120 may be located on a side of the driving component 112 away from the first diaphragm 111, so that the first diaphragm 111, the driving component 112 and the second diaphragm 120 are stacked in a direction H1 (a thickness direction of the acoustic output apparatus 100) from the first side to the second side. Where the second diaphragm 120 is spaced apart from the electroacoustic transducer 110, and there is no physical connection relationship between the second diaphragm 120 and the electroacoustic transducer 110. The housing structure 130 is configured to carry the electroacoustic transducer 110 and the second diaphragm 120, and a space between a side of the second diaphragm 120 close to the driving component 112 and a side of the first diaphragm 111 close to the driving component 112 forms a first cavity 101 with the housing structure 130, and the first cavity 101 may be limited by the first diaphragm 111, the second diaphragm 120 and the housing structure 130 so as to form a sealed cavity. Air sealed inside the first cavity 101 may form (or be similar to) an air spring under a vibration force. When the acoustic output apparatus 100 is in a working state, the driving component 112 may drive the first diaphragm 111 to vibrate, and the first diaphragm 111 may push the air spring sealed inside the first cavity 101 to vibrate and cause the second diaphragm 120 to passively vibrate with the air spring. Where a space between a side of the electroacoustic transducer 110 close to the second diaphragm 120 and the second diaphragm 120 forms a second cavity 102 with the housing structure 130, and the second cavity 102 may be a sub-cavity of the first cavity 101, and a volume of the second cavity 102 is not greater than (less than or equal to) ⅕ of an equivalent volume of the electroacoustic transducer 110.
It should be understood that, the equivalent volume of the acoustic output apparatus 100 means that after the acoustic output apparatus 100 is placed into a box with a certain internal volume, if an acoustic compliance of the air in the box is exactly equal to that of the acoustic output apparatus 100, then the internal volume of the box is the equivalent volume of the acoustic output apparatus 100. Where the acoustic compliance can be converted into a force compliance or an equivalent compliance, by an area of a diaphragm of the electroacoustic transducer 110, i.e., the first diaphragm 111 in the present application, and the force compliance can represent a looseness of a suspension system of a sound generation apparatus, such as the acoustic output apparatus 100, or a compliance of a displacement after being subjected to a force. The force compliance=the acoustic compliance/S2, where S is the area of the first diaphragm 111 of the electroacoustic transducer 110. In an acoustic output apparatus 100 or a sound generation apparatus with high compliance, the diaphragm has a large displacement after being subjected to the force, and a low resonance frequency in the case of the same diaphragm mass, and a unit of the compliance is meter per Newton (m/N).
The first diaphragm 111 in the embodiment of the present application is connected to the driving component 112 and receives a driving force of the driving component 112, and the second diaphragm 120 is spaced from the driving component 112 and passively vibrates under the action of the air spring, so that the first diaphragm 111, the driving component 112, the air spring and the second diaphragm 120 in the present application can form a double-diaphragm vibration system. Under the action of the vibration of the two diaphragms, the acoustic output apparatus 100 in the present application can transmit a sound signal to exterior of the acoustic output apparatus 100 from a side of the first diaphragm 111 away from the driving component 112 and a side of the second diaphragm 120 away from the driving component 112. At this time, a low-frequency resonance frequency of the acoustic output apparatus 100 is influenced by a mass and compliance of the air spring and a mass and compliance of the second diaphragm 120.
When a volume of the second cavity 102, which is formed by the second diaphragm 120, a side of the electroacoustic transducer 110 close to the second diaphragm 120, and the housing structure 130, is not greater than ⅕ of an equivalent volume of the electroacoustic transducer 110, the volume of the second cavity 102 is relatively small, the compliance of the air spring is relatively small, and then the elasticity of the air spring is relatively large, so that an energy of the first diaphragm 111 can be more transferred to the second diaphragm 120, and the second diaphragm 120 may provide a lower low-frequency resonance frequency for the acoustic output apparatus 100, and the acoustic output apparatus 100 may provide a low-frequency signal with a wider frequency spectrum. In this way, the acoustic output apparatus 100 has excellent bass performance.
In some embodiments, the volume of the second cavity 102 may be further not greater than ⅙, ⅛, 1/10, 1/15, etc. of the equivalent volume of the electroacoustic transducer 110. At this time, the volume of the second cavity 102 is smaller, the frequency spectrum of the low-frequency signal outputted by the acoustic output apparatus 100 is wider, and the bass performance of the acoustic output apparatus 100 is better. The embodiment of the present application does not specifically limit the volume of the second cavity 102.
In some embodiments, the driving component 112 includes a mounting frame 1121, a magnetic circuit assembly 1122 and a voice coil 1123, where the magnetic circuit assembly 1122 may be provided on the mounting frame 1121, and the voice coil 1123 can cut magnetic induction lines of the magnetic circuit assembly 1122. The first diaphragm 111 is fixedly connected to the voice coil 1123, and the first diaphragm 111 can, for example, but is not limited to, be bonded to the voice coil 1123 through an adhesive. When an electrical signal passes through the voice coil 1123, the voice coil 1123 interacts with the magnetic circuit assembly 1122 and drives the first diaphragm 111 to vibrate, and then the first diaphragm 111 may push the air spring of the first cavity 101 to vibrate and cause the second diaphragm 120 to passively vibrate with the air spring, the first diaphragm 111 may be an active diaphragm of the acoustic output apparatus 100, and the second diaphragm 120 may be a passive diaphragm of the acoustic output apparatus 100.
In some embodiments, the second diaphragm 120 may be fixedly connected to the housing structure 130 and spaced apart from the driving component 112, and the second diaphragm 120 may, for example, but is not limited to, be bonded and fixed to the housing structure 130 through an adhesive. There is a gap between the second diaphragm 120 and a side of the driving component 112 away from the first diaphragm 111, so that the second diaphragm 120 is a passive diaphragm of the acoustic output apparatus 100.
In the acoustic output apparatus 100 of the embodiment of the present application, under the action of the electroacoustic transducer 110, the second diaphragm 120 and the housing structure 130, the first diaphragm 111, the driving component 112, the air spring in the first cavity 101, and the second diaphragm 120 may form a double-diaphragm vibration sound generation system. Under the vibration of the two diaphragms, the acoustic output apparatus 100 has a small attenuation under a low-frequency sound signal, and the acoustic output apparatus 100 has an excellent low-frequency performance. Furthermore, when the volume of the second cavity 102, which is formed by the second diaphragm 120, the side of the electroacoustic transducer 110 close to the second diaphragm 120 and the housing structure 130, is not greater than 1/5 of the equivalent volume of the electroacoustic transducer 110, the volume of the second cavity 102 is relatively small, and the energy of the first diaphragm 111 can be more transferred to the second diaphragm 120, and since the second diaphragm 120 has a certain area (the area of the second diaphragm 120 in the present application is much larger than a cross-sectional area of a sound guide tube in a sound guide solution using the sound guide tube in the related art), the second diaphragm 120 has a lower vibration amplitude, and may provide a lower low-frequency resonance frequency for the acoustic output apparatus 100, and the acoustic output apparatus 100 may provide a low-frequency signal having a wider frequency spectrum, so that the acoustic output apparatus 100 may have better bass performance. Furthermore, since the first cavity 101 is a sealed space, compared with the solution using the sound guide tube, the acoustic output apparatus 100 in the present application does not have a frictional sound caused by compressing the air, which can further improve the sound quality of the acoustic output apparatus 100. Furthermore, compared with a solution of providing two sets of independent electroacoustic transducers 110 in the related art, the second diaphragm 120 in the present application is a passive diaphragm and occupies a smaller space, so that the acoustic output apparatus 100 and the earphone 10 in the present application can realize a miniaturized design, and the earphone 10 is smaller and easier to wear.
In some embodiments, a projection portion where a first orthographic projection of the electroacoustic transducer 110 on a first reference plane parallel to the first diaphragm 111 overlaps with a second orthographic projection of the second diaphragm 120 on the first reference plane has a first area. Among the first and second orthographic projections, the one with the larger area has a second area, and a ratio of the first area to the second area may be 0.7-1 (the ratio may be equal to 0.7 or 1; and numerical ranges in the present application all include end values unless otherwise specified, which will not be repeated hereinafter), and the ratio of the first area to the second area may be greater than or equal to 0.7 and less than or equal to 1. Where, the ratio of the first area to the second area may be 0.8-1, or the ratio may be 0.9-1. Based on a volume formula, when the ratio of the first area to the second area is between 0.7 and 1, the second cavity 102, which is formed by the space between the second diaphragm 120 and the side of the driving component 112 away from the first diaphragm 111 together with the housing structure 130, has a small volume, and the acoustic output apparatus 100 has excellent bass performance.
Referring to
In some embodiments, the first diaphragm 111 and the voice coil 1123 may form a first vibration system, and the second diaphragm 120 may form a second vibration system. A resonance frequency of the second vibration system may be lower than a resonance frequency of the first vibration system, so that the acoustic output apparatus 100 has excellent bass performance under action of the two vibration systems. For example, in some embodiments, a ratio of the resonance frequency of the second vibration system to the resonance frequency of the first vibration system may be greater than 0 and not more than (less than or equal to) 0.7; or the ratio of the resonance frequency of the second vibration system to the resonance frequency of the first vibration system is greater than 0 but not more than 0.6; or the ratio of the resonance frequency of the second vibration system to the resonance frequency of the first vibration system is greater than 0 but not more than 0.5.
In some embodiments, the compliance of the second vibration system is greater than the compliance of the first vibration system, and a ratio of the compliance of the second vibration system to the compliance of the first vibration system is not less than (greater than or equal to) 1.5;or the ratio of the compliance of the second vibration system to the compliance of the first vibration system is not less than 2; or the ratio of the compliance of the second vibration system to the compliance of the first vibration system is not less than 3.
It can be understood that in the acoustic output apparatus 100 of the present application, it can be set that the ratio of the resonance frequency of the second vibration system to the resonance frequency of the first vibration system is not more than 0.7; or it can be set that the ratio of the compliance of the second vibration system to the compliance of the first vibration system is not less than 1.5; or it can be set that both the ratio of the resonance frequency of the second vibration system to the resonance frequency of the first vibration system is not more than 0.7 and the ratio of the compliance of the second vibration system to the compliance of the first vibration system is not less than 1.5. At this time, the second vibration system has relatively large compliance (i.e., relatively small elasticity) and relatively small mass, and the second vibration system can provide a lower low-frequency resonance frequency for the acoustic output apparatus 100, thereby improving the bass performance of the acoustic output apparatus 100.
In some embodiments, a mass of the second vibration system can be less than a mass of the first vibration system, and a ratio of the mass of the second vibration system to the mass of the first vibration system is not greater than 0.7 (greater than 0 and less than or equal to 0.7); or the ratio of the mass of the second vibration system to the mass of the first vibration system is not greater than 0.6; or the ratio of the mass of the second vibration system to the mass of the first vibration system is not greater than 0.5. At this time, the second vibration system with a smaller mass is more easily driven by the air spring so as to provide a low low-frequency resonance frequency for the apparatus.
In some embodiments, a mass of the second diaphragm 120 may be less than a mass of the first diaphragm 111, that is, the second diaphragm 120 is lighter than the first diaphragm 111, and the second diaphragm 120 has a smaller mass. At this time, the second diaphragm 120 is more easily driven by the air spring sealed inside the first cavity 101, and the second diaphragm 120 may provide the acoustic output apparatus 100 with a lower low-frequency resonance frequency than the first vibration system, so as to further improve the bass performance of the acoustic output apparatus 100.
In some embodiments, the compliance of the second diaphragm 120 may be greater than that of the first diaphragm 111, the second diaphragm 120 is softer than the first diaphragm 111, and the second diaphragm 120 may provide a low low-frequency resonance frequency for the acoustic output apparatus 100.
It should be understood that, in the acoustic output apparatus 100 of the present application, it may be set that the mass of the second diaphragm 120 is less than the mass of the first diaphragm 111, or it may be set that the compliance of the second diaphragm 120 is greater than the compliance of the first diaphragm 111, or it may be set that both the mass of the second diaphragm 120 is less than the mass of the first diaphragm 111 and the compliance of the second diaphragm 120 is greater than the compliance of the first diaphragm 111.
In some embodiments, an area of the second diaphragm 120 (for example, an area of an orthographic projection of the second diaphragm 120 on a reference plane parallel to the second diaphragm 120) may be greater than or equal to an area of the first diaphragm 111 (for example, an area of an orthographic projection of the first diaphragm 111 on a reference plane parallel to the first diaphragm 111), and a ratio of the area of the second diaphragm 120 to the area of the first diaphragm 111 may be not less than 1 (greater than or equal to 1); or the ratio of the area of the second diaphragm 120 to the area of the first diaphragm 111 may be not less than 1.3; or the ratio of the area of the second diaphragm 120 to the area of the first diaphragm 111 may be not less than 1.5. At this time, the second diaphragm 120 with a larger area may receive more vibration energy transferred by the air spring, and then the second diaphragm 120 may further provide the acoustic output apparatus 100 with a lower low-frequency resonance frequency than the first vibration system to a greater extent, thereby improving the bass performance of the acoustic output apparatus 100.
It should be understood that, in the embodiments of the present application, one, two, or three factors of the mass, compliance, and area of the second diaphragm 120 may be improved, so as to further improve the bass performance of the acoustic output apparatus 100. It should be noted that even if the area of the second diaphragm 120 is larger than that of the first diaphragm 111, the mass of the second diaphragm 120 can be smaller than that of the first diaphragm 111 by designing such as the material and local thinning structure of the second diaphragm 120.
The acoustic output apparatus 100 in the embodiments of the present application, by improving the factors such as the mass, compliance and area of the second diaphragm 120, and the factors such as the resonance frequency, compliance and mass of the first and second vibration systems, the second diaphragm 120 may receive the vibration energy transferred by the first vibration system to a greater extent and have a low vibration amplitude, and the second diaphragm 120 may provide a lower low-frequency resonance frequency than the first vibration system to improve the bass performance of the acoustic output apparatus 100, thereby reducing nonlinear distortion of the acoustic output apparatus 100 and the earphone 10. Meanwhile, since the first cavity 101, which is formed by the space between the side of the second diaphragm 120 close to the driving component 112 and the side of the first diaphragm 111 close to the driving component 112 and the housing structure 130, is a sealed cavity, compared to the sound transmission through the sound guide tube in the related art, such double-diaphragm vibration system of the present application does not have the frictional sound caused by compressing the air, which can further improve the sound quality of the acoustic output apparatus 100.
Based on the structure of the foregoing acoustic output apparatus 100, referring to
The third cavity 103 is formed between a side of the first diaphragm 111 away from the driving component 112 and the housing structure 130. For example, the housing structure 130 located on one side of the first diaphragm 111 away from the driving component 112 may enclose with the first diaphragm 111 to form the third cavity 103. The housing structure 130 further includes at least one first sound output hole 131, where the first sound output hole 131 may be provided on the housing structure 130 at one side of the first diaphragm 111 away from the driving component 112, the first sound output hole 131 may penetrate the housing structure 130 along a thickness direction of the housing structure 130, and the first sound output hole 131 may be communicated with the third cavity 103 so as to achieve acoustic coupling. In a working state, the driving component 112 may drive the first diaphragm 111 to vibrate and radiate a sound signal to the third cavity 103, where the sound signal may be exported to exterior of the acoustic output apparatus 100 through the first sound output hole 131.
In some embodiments, the housing structure 130 may be provided with one or more first sound output holes 131. Referring to
It should be understood that, the one or more first sound output holes may be provided on the housing structure 130 that is provided directly opposite to the first diaphragm 111, or provided on the housing structure 130 that is opposite to or not opposite to the first diaphragm 111. It should be understood that, as shown in
It should be understood that the one or more first sound output holes 131 may be circular, elliptical, polygonal or other irregular shapes, and there is no limitation on this in the embodiments of the present application.
In some embodiments, reference may be made to
It can be understood that, an arc radius of the first curved face 139 may be not less than 1.5 mm, or not less than 2 mm, or not less than 2.5 mm, or not less than 3 mm. A radian of the first curved face 139 may be not less than 30°, or not less than 40°, or not less than 45°. The present application may perform the above-mentioned design on the arc radius or the radian of the first curved face 139, or perform the above-mentioned design on both the arc radius and the radian of the first curved face 139.
Based on the structure of the acoustic output apparatus 100 mentioned above, referring to
A side of the second diaphragm 120 away from the electroacoustic transducer 110 forms the fourth cavity 104 with the housing structure 130, for example, the housing structure 130 located at the side of the second diaphragm 120 away from the electroacoustic transducer 110 may enclose with the second diaphragm 120 to form the fourth cavity 104. Where the housing structure 130 further includes at least one second sound output hole 132, the second sound output hole 132 may be provided on the housing structure 130 at the side of the second diaphragm 120 away from the electroacoustic transducer 110, the second sound output hole 132 may penetrate the housing structure 130 along a thickness direction of the housing structure 130, and the second sound output hole 132 may be communicated with the fourth cavity 104 and achieve an acoustic coupling. In a working state, the driving component 112 drives the first diaphragm 111 to vibrate and pushes the air spring to vibrate, causing the second diaphragm 120 to passively vibrate and radiate a sound signal to the fourth cavity 104, and the sound signal is exported to an exterior of the acoustic output apparatus 100 through the second sound output hole 132.
It should be understood that, one or more second sound output holes 132 may be provided on the housing structure 130. The one or more second sound output holes 132 may be provided on the housing structure 130 that is provided directly opposite, laterally opposite, or not opposite to the second diaphragm 120. The one or more second sound output holes 132 may be circular, elliptical, polygonal, or other irregular shapes. The position and shape of the second sound output holes 132 are not limited in the embodiment of the present application.
In some embodiments, reference may be made to
It can be understood that, an arc radius of the second curved face 143 may be not less than 1.5 mm, or not less than 2 mm, or not less than 2.5 mm, or not less than 3 mm. A radian of the second curved face 143 may be not less than 30°, or not less than 40°, or not less than 45°. The present application may perform the above-mentioned design on the arc radius or the radian of the second curved face 143, or perform the above-mentioned design on both the arc radius and the radian of the second curved face 143.
The acoustic output apparatus 100 in the embodiments of the present application may include both the third cavity 103 and the fourth cavity 104, and the third cavity 103 and the fourth cavity 104 can be a front cavity and a rear cavity of the acoustic output apparatus 100, respectively. The acoustic output apparatus 100 radiates sound outwards through the two cavities and the sound output holes provided on the cavities, and thus the acoustic output apparatus 100 can have excellent sound generation performance. At the same time, when the inner cavity faces of the third cavity 103 and the fourth cavity 104 are in an curved structure, the volume of the third cavity 103 and the fourth cavity 104 can be reduced, and a propagation direction of the sound signal in the two cavities can be in arbitrary direction, thereby reducing the probability of generating standing wave energy, so that the acoustic output apparatus 100 can have excellent acoustic performance.
In order to further reduce an adverse effect caused by the standing wave, reference may be made to
Referring to
The protective structure 150 is provided at a side of the second diaphragm 120 away from the electroacoustic transducer 110, the protective structure 150 can be connected to the housing structure 130, and the protective structure 150 is configured to separate the second diaphragm 120 from an exterior of the acoustic output apparatus 100 and is capable of propagating a sound generated by the second diaphragm 120 to the exterior of the acoustic output apparatus 100.
It should be understood that, the protective structure 150 may be a filter screen structure. For example, the protective structure 150 may be a metal screen cover or a plate-like structure formed with at least one hole structure.
The acoustic output apparatus 100 in the embodiments of the present application is provided with the protective structure 150, and at this time, the acoustic output apparatus 100 does not form a fourth cavity 104 that is formed by a side of the second diaphragm 120 away from the electroacoustic transducer 110 and the housing structure 130, and the protective structure 150 substantially does not block or reflect the sound generated by the second diaphragm 120 or produce other effect on it, and the protective structure 150 mainly plays a role in protecting the second diaphragm 120, and a sound signal generated by the second diaphragm 120 is not easily to produce a standing wave phenomenon in a propagation process, and the second diaphragm 120 can directly radiate the sound signal to the exterior of the acoustic output apparatus 100 to achieve a good sound offset in a far field with a signal generated by the first sound output hole 131, so that sound leakage of the acoustic output apparatus 100 and the headphone 10 can be reduced.
It should be noted that the acoustic output apparatus 100 in the present application may include the third cavity 103 and the fourth cavity 104 as shown in
Reference may be made to
The diaphragm body 121 includes a middle flat portion 1211 and a folded ring portion 1212, which are sequentially connected, where the folded ring portion 1212 can protrude from the middle flat portion 1211 along a side away from the electroacoustic transducer 110, the middle flat portion 1211 can be formed within an area enclosed by the folded ring portion 1212, and the folded ring portion 1212 can be connected to the housing structure 130 so as to realize a fixed connection between the second diaphragm 120 and the housing structure 130. The flat central sticker 122 is adhered to a surface of the middle flat portion 1211, and the term “adhered” herein refers to that the flat central sticker 122 is stacked on one side of a surface of the middle flat portion 1211 and is connected to the surface. For example, the flat central sticker 122 can be, but is not limited to, adhered to a surface of the middle flat portion 1211 away from the electroacoustic transducer 110. Where at least part of the flat central sticker 122 can be provided opposite to the middle flat portion 1211, and an orthographic projection of at least part of the flat central sticker 122 on the diaphragm body 121 can overlap the middle flat portion 1211.
In some embodiments, the middle flat portion 1211 may be provided with a first through hole 123, and the first through hole 123 may penetrate the middle flat portion 1211 along a thickness direction of the middle flat portion 1211, and the first through hole 123 is conducive to dissipation of heat generated during operation of the electroacoustic transducer 110.
In some embodiments, the flat central sticker 122 may be provided with a second through hole 124 communicated with the first through hole 123. For example, the second through hole 124 is provided on an area of the flat central sticker 122 opposite to the middle flat portion 1211. The second through hole 124 may be directly provided opposite to and communicated with the first through hole 123, the first through hole 123 may be communicated with the fourth cavity 104 through the second through hole 124, and the first through hole 123 and the second through hole 124 are more conducive to dissipation of heat generated during operation of the electroacoustic transducer 110. It should be noted that the second through hole 124 may also be partially staggered with and communicated with the first through hole 123, and specific arrangement positions of the second through hole 124 and the first through hole 123 are not limited in the present application.
In some embodiments, the second diaphragm 120 may further include one or both of a first blocking member and a second blocking member, where the first blocking member includes a mesh structure and can be connected to the diaphragm body 121, and the first blocking member can be matched with the first through hole 123 so as to cover the first through hole 123. It can be understood that, the first blocking member may be provided within the first through hole 123 (including being provided at an opening of the first through hole 123 in the middle flat portion 1211), or the first blocking member may be provided on a side of the middle flat portion 1211 away from the flat central sticker 122 and cover the first through hole 123. The second blocking member includes a mesh structure, the second blocking member can be connected to the flat central sticker 122, and the second blocking member can be matched with the second through hole 124 and cover the second through hole 124. It can be understood that, the second blocking member may be provided in the second through hole 124 (including being provided at an opening of the second through hole 124 in the flat central sticker 122), or the second blocking member may be provided on a side of the flat central sticker 122 away from the middle flat portion 1211 and cover the second through hole 124.
It should be understood that, at least one of the first blocking member and the second blocking member may be a waterproof breathable film or a low breathable mesh structure. The waterproof breathable film may be prepared from any one of polytetrafluoroethylene, expanded polytetrafluoroethylene, polyurethane resin, thermoplastic polyurethane elastomer and the like.
The middle flat portion 1211 of the second diaphragm 120 in the present application is provided with the first through hole 123, the flat central sticker 122 is provided with the second through hole 124, and the second diaphragm 120 further includes the first blocking member covering the first through hole 123 and the second blocking member covering the second through hole 124. On one hand, the above-mentioned structure of the second diaphragm 120 can achieve the purpose of waterproofing, and at the same time can dissipate heat generated in operation of the electroacoustic transducer 110, and help the internal cavity of the acoustic output apparatus 100 to relieve pressure, so as to balance gas pressure of the first cavity 101 and the fourth cavity 104.
It should be noted that, the first diaphragm 111 may also have a structure similar to the second diaphragm 120. In this case, the acoustic output apparatus 100 may further dissipate the heat generated in operation of the electroacoustic transducer 110, and the gas pressure of the third cavity 103 and the fourth cavity 104 may also be balanced. A specific structure of the first diaphragm 111 will not be described in detail here. It should be noted that, in the embodiments shown in
Based on the acoustic output apparatus 100, an embodiment in the present application further provides an earphone 10, and the earphone 10 may be a wireless earphone structure, a wired earphone structure, an in-ear earphone structure, a semi-in-ear earphone structure, an earplug earphone structure, an open earphone structure, or the like. The embodiments in the present application do not limit a specific type of the earphone 10.
Referring to
Reference may be made to
It should be understood that, the earphone 10 can further include a battery, a mainboard and other structure, and the battery and the mainboard may be provided in the functional structure 200. Of course, the earphone 10 can further include other structure, such as but not limited to a Bluetooth antenna module, a USB charging module, etc. This is not limited in the embodiments in the present application.
According to the earphone 10 in the embodiments of the present application, the first diaphragm 111, the driving component 112, the air spring in the first cavity 101, and the second diaphragm 120 of the acoustic output apparatus 100 may form a double-diaphragm vibration sound generation system. Under vibration of the two diaphragms, the attenuation of the acoustic output apparatus 100 under low-frequency sound signal is relatively small, and when a volume of the second cavity 102, which is formed by the second diaphragm 120, a side of the electroacoustic transducer 110 close to the second diaphragm 120 and the housing structure 130, is not greater than ⅕ of an equivalent volume of the electroacoustic transducer 110, the volume of the second cavity 102 is relatively small, and the second diaphragm 120 may provide a low low-frequency resonance frequency for the acoustic output apparatus 100, and the acoustic output apparatus 100 may provide a low-frequency signal having a wide frequency spectrum, so that the acoustic output apparatus 100 may have excellent bass performance. Furthermore, since the second cavity 102 is a sealed space, compared with a solution of using a sound guide tube, the acoustic output apparatus 100 in the present application does not have a frictional sound caused by compressing the air, which can further improve the sound quality of the acoustic output apparatus 100. Furthermore, compared with a solution of providing two sets of independent electroacoustic transducers 110 in the related art, the second diaphragm 120 in the present application is a passive diaphragm and occupies a relatively small space, so that the earphone 10 in the present application can achieve a miniaturized design, and the earphone 10 is smaller and easier to wear.
As shown in
A first folded ring 3 is provided inside the first copper ring 8, a magnet 5 is provided above the composite membrane 11, and a first washer 6 is provided on a side of the magnet 5, where the first washer 6 achieves a buffering effect.
A magnetic conduction plate 4 is provided above the magnet 5, and the magnetic conduction plate 4 is provided below the first folded ring 3, where the magnet 5 provides an adsorption effect. An outer wall of the support 15 is provided with upper and lower pairs of first copper rings 18, and one side of an interior of the support 15 is provided with a first side magnet 17, where the first side magnet 17 provides the effect of further adsorption and fixation.
The other side of the interior of the support 15 is provided with a second side magnet 18, and a second washer 16 is provided both above the second side magnet 18 and above the first side magnet 17, respectively. A second folded ring 19 is provided below the support 15, and a left-right symmetrical voice coil 12 is provided above the composite membrane 11.
The ultra-linear multi-magnetic double-diaphragm loudspeaker uses a square multi-magnetic circuit structure which includes a neodymium-iron-boron magnetic steel, where the magnetic steel is formed by sintering and cutting a rare earth material and has a magnetic field strength much higher than a ferrite magnetic steel; and further uses a composite material to prepare diaphragms (double diaphragms), where a purpose of using the composite diaphragm is to make the diaphragms have improved rigidity, reduced density and appropriate internal damping;
The working principle of the ultra-linear multi-magnetic double-diaphragm loudspeaker is as follows: when the ultra-linear multi-magnetic double-diaphragm loudspeaker needs to be used, the first pin 1 and the second pin 2 are firstly used to perform convenient mounting, and then the magnetic conduction plate 4 and the magnet 5 are to pass through the loudspeaker so as to achieve an adsorption effect, and the apparatus uses a square multi-magnetic circuit structure of neodymium-iron-boron magnetic steel, which is formed by sintering and cutting a rare earth material and has a magnetic field strength much higher than a ferrite magnetic steel, and at the same time, the present apparatus uses a composite material to prepare diaphragms (double diaphragms), and a purpose of using the composite diaphragm is to make the diaphragms have improve rigidity, reduced density and appropriate internal damping.
It should be understood that, in the description of the embodiments in the present application, the orientations or position relationships indicated by the terms “center”, “longitudinal”, “transversal”, “length”, “width”, “thickness”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, “clockwise”, “counterclockwise”, etc. are based on the orientations or position relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the indicated apparatus or component must have a specific orientation or be constructed and operated in a specific orientation, and thus they cannot be understood as a limitation on the present application.
It should be noted that, in the description of the present application, terms such as “first”, “second”, and “third” are only used for distinguishing similar objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Thus, the features defined by “first”, “second”, and “third” may explicitly or implicitly include one or more such features. In the description of the present application, “a plurality of” means two or more than two, unless otherwise specified.
In the present application, unless otherwise specified or limited, the terms “mount”, “connect”, “communicate”, and “fix” should be broadly understood, for example, it may be connection, detachable connection, or integrated; or it may be mechanical connection or electrical connection; or it may be direct connection or indirect connection through an intermediate medium;
or it may be inner communication of two elements or interaction relationships of two elements. For ordinary those skilled in the art, the specific meanings of the above terms in the present application can be understood based on specific circumstances.
In the present application, unless otherwise specified and limited, the wording that a first feature is “above” or “under” a second feature may include an embodiment in which the first feature is in direct contact with the second feature, and may also include an embodiment in which the first feature is not in direct contact with the second feature, but is contacted through another feature between them. Furthermore, the wording that the first feature is “on”, “above” or “on top of” the second feature may include an embodiment in which the first feature is directly or obliquely above the second feature, or just means that a horizontal height of the first feature is higher than that of the second feature. The wording that the first feature is “below”, “under” or “on bottom of” the second feature include an embodiment in which the first feature is directly or obliquely below the second feature, or just means that a horizontal height of the first feature is lower than that of the second feature.
In the present application, the description referring to terms “an embodiment”, “some embodiments”, “example”, “specific example”, or “some examples” means that the specific features, structures, materials, or features described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the specification of the present application, the schematic expressions of the above terms should not be understood as necessarily referring to the same embodiments or examples. Furthermore, the above-described specific features, structures, materials, or characteristics may be combined in an appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and recombine different embodiments or examples described in the specification.
The acoustic output apparatus and the earphone provided in the embodiments of the present application are described in detail in the above. The present application applies specific individual embodiments to illustrate principles and implementation methods of the present application, and the description of the foregoing embodiments is merely used to help understand the methods and core ideas of the present application. At the same time, those skilled in the art may make modifications to the specific embodiments and application scope based on the ideas of the present application. In summary, the contents of this specification should not be understood as a limitation of the present application.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202310145578.5 | Feb 2023 | CN | national |
| 202320184066.5 | Feb 2023 | CN | national |
| 202322717683.X | Oct 2023 | CN | national |
The present application is a continuation of International Application No. PCT/CN2023/135507, filed on Nov. 30, 2023 and entitled “ACOUSTIC OUTPUT DEVICE, EARPHONE, AND SUPER-LINEAR MULTI-MAGNETIC DUAL-DIAPHRAGM SPEAKER”, which claims the priority to the Chinese utility model patent with Patent Application No. 202322717683.X filed on Oct. 10, 2023 and entitled “ACOUSTIC OUTPUT APPARATUS AND EARPHONE”, the Chinese invention patent with Patent Application No. 202310145578.5 filed on Feb. 10, 2023 and entitled “ULTRA-LINEAR MULTI-MAGNETIC DOUBLE-DIAPHRAGM LOUDSPEAKER”, and the Chinese utility model patent with Patent Application No. 202320184066.5 filed on Feb. 10, 2023 and entitled “ULTRA-LINEAR MULTI-MAGNETIC DOUBLE-DIAPHRAGM LOUDSPEAKER”. All of the aforementioned applications are hereby incorporated by reference in their entireties.
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/CN2023/135507 | Nov 2023 | WO |
| Child | 18807832 | US |
