Loudspeaker and electronic equipment

Abstract

The invention discloses a loudspeaker and electronic equipment, the loudspeaker comprises a magnetic circuit system and a vibration system, the magnetic circuit system comprises two magnets and two voice coils, the two magnets are oppositely arranged along a first direction, and the two voice coils are arranged between the two magnets at intervals along the first direction; the vibration system comprises a movable rod and a voice diaphragm, the movable rod comprises two magnetic conductive parts and a deformation part connected with the two magnetic conductive parts, the two magnetic conductive parts extend into the two voice coils in a one-to-one correspondence mode, and the deformation part is connected with the voice diaphragm. The two voice coils can be electrified to drive the two magnetic conductive parts to be close to or far away from each other, so that the deformation part deforms and drives the voice diaphragm to vibrate and produce sound along the second direction, and the moving rod directly drives the voice diaphragm to vibrate, so that the transient response capability of the loudspeaker can be guaranteed. And the displacement of the deformation part in the second direction can scale the displacement of the magnetic conductive parts on the two sides in the left-right direction. Displacement of the magnetic conductive portion can be converted into large-amplitude vibration of the voice diaphragm, energy output of a low-frequency band is increased, and performance of the loudspeaker in the low-frequency band is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of loudspeakers, and in particular to a loudspeaker and an electronic device. Background Art

[0002] In the related art, the moving iron speaker uses an electromagnet to generate an alternating magnetic field. When the audio signal flows through the electromagnet, it causes the change of the electromagnet's magnetic field, which in turn drives the iron sheet suspended in front of the electromagnet to vibrate and make a sound. However, the internal structure of the traditional moving iron speaker is extremely delicate and complex, and the requirements for production equipment and processes are extremely high. In order to ensure the quality and performance of the product, high-precision production equipment must be used and strict production processes must be followed. This makes the production cost of traditional moving iron speakers high and the efficiency low. In addition, the vibration area of ​​the moving iron speaker is relatively small, and it is difficult to generate enough low-frequency energy, which affects its overall sound quality performance. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a speaker that can directly drive the vibration of the sound membrane through the force transmitted by the moving rod, while ensuring the transient response of the speaker, providing sufficient low-frequency energy, thereby improving the overall sound quality performance of the speaker.

[0004] The invention also provides an electronic device having the speaker.

[0005] According to the speaker of the first aspect of the embodiment of the present invention, the speaker includes: a magnetic circuit system, including two magnets and two voice coils, the two magnets are arranged opposite to each other along a first direction, and the two voice coils are arranged between the two magnets along the first direction at intervals; a vibration system, including a moving rod and a sound membrane, the moving rod includes two magnetic conductive parts and a deformation part connecting the two magnetic conductive parts, the two magnetic conductive parts extend into the two voice coils one by one, and the deformation part is connected to the sound membrane; wherein the two voice coils are used to energize and drive the two magnetic conductive parts to move closer to or away from each other, so that the deformation part is deformed and drives the sound membrane to vibrate and make sound along a second direction; the first direction is perpendicular to the second direction.

[0006] The speaker according to the embodiment of the present invention has at least the following beneficial effects: the two voice coils are energized to form an induced magnetic field, and the magnetic conductive part forms a temporary magnet under the action of the corresponding induced magnetic field, and is attracted or repelled by the magnet to move in the first direction, and the deformation part converts the force of the magnetic conductive parts on both sides in the first direction into deformation in the second direction, thereby driving the vibration of the sound membrane; this method of directly driving the vibration of the sound membrane by the moving rod can ensure the transient response capability of the speaker. And the second direction displacement of the deformation part can scale the displacement of the magnetic conductive parts on both sides in the left and right directions. This is conducive to converting the displacement of the magnetic conductive parts on both sides in the left and right directions into large-scale vibration of the sound membrane, especially in the low-frequency band, which can increase the energy output in the low-frequency band and improve the performance of the speaker in the low-frequency band.

[0007] According to some embodiments of the present invention, the deformation portion includes a first folding plate and a second folding plate arranged at an angle, the connection between the first folding plate and the second folding plate is connected to the sound membrane, the end of the first folding plate away from the second folding plate is connected to one of the magnetic conductive portions, and the end of the second folding plate away from the first folding plate is connected to the other magnetic conductive portion.

[0008] According to some embodiments of the present invention, the angle formed between the first folding plate and the second folding plate is 60° to 120°; and / or the first folding plate and the second folding plate are symmetrically arranged.

[0009] According to some embodiments of the present invention, a connecting protrusion is formed at the connection between the first folding plate and the second folding plate, and the connecting protrusion protrudes in an arc shape toward the sound membrane, and the vertex of the connecting protrusion is connected to the sound membrane; the thickness of the connecting protrusion is smaller than the thickness of the first folding plate and the thickness of the second folding plate.

[0010] According to some embodiments of the present invention, the voice coil is filled with a magnetic fluid, and the magnetic fluid connects the voice coil and the corresponding magnetic conductive part.

[0011] According to some embodiments of the present invention, the speaker also includes a bottom plate, the bottom plate has a strip groove along a first direction, and the opening direction of the strip groove is arranged along a second direction; the two magnets and the two voice coils are both arranged in the strip groove, and the two magnets are respectively located at both ends of the strip groove.

[0012] According to some embodiments of the present invention, the speaker also includes an upper plate, which is arranged at the opening of the bottom plate, and has a avoidance opening connected to the strip groove; the projection of the upper plate along the second direction at least covers the magnet and the voice coil, and the deformation portion passes through the avoidance opening to be connected to the sound membrane.

[0013] According to some embodiments of the present invention, the upper plate includes two plate bodies spaced apart along a first direction, and the avoidance opening is formed between the two plate bodies; the plate bodies are connected one by one to the side of the magnet facing away from the bottom plate, and an installation space for accommodating the voice coil is formed between the plate bodies, the magnet and the bottom plate.

[0014] According to some embodiments of the present invention, the magnetic poles on opposite sides of the two magnets are opposite, and the current-carrying directions of the two voice coils are the same.

[0015] According to an electronic device of an embodiment of a second aspect of the present invention, the electronic device includes the speaker of the first aspect.

[0016] The electronic device according to the embodiment of the present invention has at least the following beneficial effects: the speaker of the electronic device can directly drive the sound membrane to vibrate by transmitting the force through the moving rod, while ensuring the transient response of the speaker, providing sufficient low-frequency energy, thereby improving the overall sound quality performance.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0019] Figure 1 is a schematic cross-sectional structure diagram of a speaker in an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the speaker after the sound membrane is removed in an embodiment of the present invention;

[0021] Figure 3 It is a schematic diagram of the magnetic poles of the voice coil of the speaker in the embodiment of the present invention when it is powered on;

[0022] Figure 4 It is a structural schematic diagram of a moving rod in an embodiment of the present invention;

[0023] Figure 5 is a schematic cross-sectional structure diagram of a speaker in an embodiment of the present invention;

[0024] Figure 6 A schematic diagram of the structure of a sound membrane in an embodiment of the present invention;

[0025] Figure 7 It is a schematic diagram of the structure of the sound membrane in another embodiment of the present invention.

[0026] Reference numerals:

[0027] 100. Speaker;

[0028] 10. Magnetic circuit system; 11. Magnet; 11a. First magnet; 11b. Second magnet; 12. Voice coil; 12a. First voice coil; 12b. Second voice coil;

[0029] 20. Vibration system; 21. Moving rod; 211. Magnetic conductive part; 211a. First magnetic conductive part; 211b. Second magnetic conductive part; 212. Deformation part; 2121. First folding plate; 2122. Second folding plate; 2123. Connecting protrusion; 22. Sound membrane; 221. Folding ring;

[0030] 30. Magnetic fluid;

[0031] 40. bottom plate; 41. strip groove; 42. base plate; 43. side plate;

[0032] 50. Upper plate; 51. Plate body; 51a. First plate body; 51b. Second plate body; 52. Avoidance. DETAILED DESCRIPTION

[0033] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0034] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] In the description of the present invention, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0036] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0037] In the description of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0038] like Figure 1 As shown, the present invention provides a speaker 100. In some embodiments, the speaker 100 includes a magnetic circuit system 10 and a vibration system 20. The magnetic circuit system 10 generally includes a magnet 11 and a voice coil 12. The magnet 11 provides a stable magnetic field. When the voice coil 12 is energized, an induced magnetic field is generated. The induced magnetic field can act on the vibration system 20 to form a temporary magnet 11, so that the magnet 11 attracts or repels the vibrator 20 to generate vibration and sound.

[0039] In this embodiment, if Figures 1 to 3 As shown, the magnetic circuit system 10 includes two magnets 11 and two voice coils 12. For the convenience of description, the two magnets 11 are defined as the first magnet 11a and the second magnet 11b, and the two voice coils 12 are defined as the first voice coil 12a and the second voice coil 12b. The first magnet 11a and the second magnet 11b are arranged opposite to each other along the first direction, and the first voice coil 12a and the second voice coil 12b are both located between the first magnet 11a and the second magnet 11b, and the first voice coil 12a and the second voice coil 12b are arranged at intervals along the first direction. That is, the first magnet 11a, the first voice coil 12a, the second voice coil 12b and the second magnet 11b are arranged in sequence along the first direction, and there is a certain distance between the first voice coil 12a and the second voice coil 12b.

[0040] The first direction is Figure 1 In the left-right direction, the first voice coil 12a forms an induced magnetic field on the left side, and the second voice coil 12b forms an induced magnetic field on the right side.

[0041] The vibration system 20 includes a movable rod 21 and a sound membrane 22. The movable rod 21 includes two magnetic conductive parts 211 and a deformation part 212 connecting the two magnetic conductive parts 211. For the convenience of description, the two magnetic conductive parts 211 are defined as a first magnetic conductive part 211a and a second magnetic conductive part 211b, respectively. Then the movable rod 21 includes a first magnetic conductive part 211a, a deformation part 212 and a second magnetic conductive part 211b connected in sequence, and the deformation part 212 is connected to the sound membrane 22. The first magnetic conductive part 211a extends into the first voice coil 12a, and the second magnetic conductive part 211b extends into the second voice coil 12b. That is, the first magnetic conductive part 211a and the second magnetic conductive part 211b are arranged at intervals along the first direction; and when the first voice coil 12a and the second voice coil 12b are energized, the first magnetic conductive part 211a forms a temporary magnet under the action of the induced magnetic field on the left, and the second magnetic conductive part 211b forms a temporary magnet under the action of the induced magnetic field on the right.

[0042] The first magnetic conductive part 211a is repelled by the first magnet 11a and moves to the right, while the second magnetic conductive part 211b is repelled by the second magnet 11b and moves to the left, so that the first magnetic conductive part 211a and the second magnetic conductive part 211b are close to each other; the force is transmitted to the deformation part 212, and the deformation part 212 is deformed by the force to drive the sound film 22 to move upward. On the contrary, by changing the direction of the current passing through the first voice coil 12a and the second voice coil 12b, the first magnetic conductive part 211a is attracted by the first magnet 11a and moves to the left, while the second magnetic conductive part 211b is attracted by the second magnet 11b and moves to the right, so that the first magnetic conductive part 211a and the second magnetic conductive part 211b are separated from each other; the force is transmitted to the deformation part 212, and the deformation part 212 is deformed by the force to drive the sound film 22 to move downward. As a result, the sound film 22 can vibrate along the second direction driven by the moving rod 21. Of course, the first magnetic conductive portion 211a and the second magnetic conductive portion 211b may be brought closer to each other so that the deformation portion 212 drives the sound membrane 22 to move downward, or the first magnetic conductive portion 211a and the second magnetic conductive portion 211b may be moved away from each other so that the deformation portion 212 drives the sound membrane 22 to move upward. This embodiment does not limit this.

[0043] In actual application, audio signals are connected to the first voice coil 12a and the second voice coil 12b, and these audio signals are converted into continuously changing currents, thereby causing the first voice coil 12a and the second voice coil 12b to generate continuously changing induced magnetic fields; thereby quickly adjusting the polarity and strength of the induced magnets formed by the first magnetic conductive part 211a and the second magnetic conductive part 211b, and the first magnetic conductive part 211a and the second magnetic conductive part 211b are moved to different positions under the action of the first magnet 11a and the second magnet 11b, respectively, and transmitted to the deformation part 212, and the deformation part 212 converts the force of the magnetic conductive parts 211 on both sides in the left and right directions into deformation in the up and down directions, thereby driving the vibration of the sound film 22. That is, in this embodiment, the change of the induced magnetic field drives the movable rod 21 to move and deform, and the movable rod 21 directly drives the sound film 22 to vibrate and make sound, which can ensure the transient response capability of the speaker 100. In addition, the displacement of the deformation part 212 in the vertical direction in this embodiment is not absolutely equal to the displacement of the magnetic conductive parts 211 on both sides in the horizontal direction, but can be scaled by the ratio of the displacement of the magnetic conductive parts 211 on both sides in the horizontal direction. This is conducive to converting the displacement of the magnetic conductive parts 211 on both sides in the horizontal direction into a large amplitude vibration of the sound membrane 22, especially in the low frequency band, which can increase the energy output in the low frequency band and improve the performance of the speaker 100 in the low frequency band.

[0044] And compared to the traditional moving iron speaker 100 that realizes transmission through a U-shaped iron sheet and a moving rod 21 structure, the structure of the speaker 100 in this embodiment is significantly simplified. Specifically, in this embodiment, the mutually nested relationship between the U-shaped iron sheet, the magnet, and the voice coil in the traditional speaker 100 is cancelled, and a simple interval arrangement is used instead. This design reduces the interference between components and reduces the difficulty of the production process. And by compressing the deformation portion 212, the moving rod 21 can be placed between the two voice coils 12 and then the deformation is restored to achieve installation of the moving rod 21, which can make the assembly process of the speaker 100 simpler and more efficient.

[0045] The speaker 100 in this embodiment can be applied to electronic devices, such as headphones, OWS headphones (Open Wearable Stereo, true wireless stereo headphones) and other headphone devices, and can also be applied to smart glasses, VR (Virtual Reality) devices, AR (Augmented Reality) devices and other products; it should be noted that in order to meet the size and performance requirements of different electronic devices, the volume of the speaker 100 and the vibration area of ​​the sound membrane 22 can be designed according to actual conditions. The speaker 100 can adapt to various application scenarios and provide a better sound experience.

[0046] It should be noted that the first direction is the left-right direction and the second direction is the up-down direction for the sake of convenience in the subsequent description. In practical applications, the first direction and the second direction can be determined according to the actual installation position and sound direction of the speaker 100.

[0047] It has been explained before that the magnet 11 generates a stable magnetic field, and the voice coil 12 is energized to generate an induced magnetic field so that the first magnetic conductive part 211a and the second magnetic conductive part 211b form a temporary magnet, so that the first magnetic conductive part 211a and the second magnetic conductive part 211b move under the action of the magnet 11, which is described in detail below.

[0048] In some embodiments, the magnetic poles of the two magnets 11 on opposite sides are opposite, and the two voice coils 12 are energized in the same direction.

[0049] For example, if Figure 3 As shown, the left end of the first magnet 11a is an S pole and the right end is an N pole, and the left end of the second magnet 11b is an S pole and the right end is an N pole. When the current direction in the first voice coil 12a and the second voice coil 12b is counterclockwise, the left end of the temporary magnet formed by the first magnetic conductive part 211a is an N pole and the right end is an S pole, and the left end of the temporary magnet formed by the second magnetic conductive part 211b is an N pole and the right end is an S pole. Thus, the first magnetic conductive part 211a can be repelled by the first magnet 11a to move to the right, and the second magnetic conductive part 211b can be repelled by the second magnet 11b to move to the left, and the two magnetic conductive parts 211 are close to each other to deform the deformation part 212 and drive the sound membrane 22 to move upward.

[0050] On the contrary, when the current direction in the first voice coil 12a and the second voice coil 12b is clockwise, the left end of the temporary magnet formed by the first magnetic conductive part 211a is the S pole and the right end is the N pole, and the left end of the temporary magnet formed by the second magnetic conductive part 211b is the S pole and the right end is the N pole. Thus, the first magnetic conductive part 211a can be attracted by the first magnet 11a to move to the left, and the second magnetic conductive part 211b can be attracted by the second magnet 11b to move to the right, and the two magnetic conductive parts 211 move away from each other to deform the deformation part 212 and drive the sound membrane 22 to move downward.

[0051] In this example, clockwise and counterclockwise are Figure 1 The direction of the viewing angle from left to right.

[0052] In other examples, the first magnet 11a may have an N pole at its left end and an S pole at its right end, and the second magnet 11b may have an N pole at its left end and an S pole at its right end.

[0053] In some other embodiments, the magnetic poles on opposite sides of the two magnets 11 are the same, and the two voice coils 12 are energized in opposite directions.

[0054] For example, the left end of the first magnet 11a is an S pole and the right end is an N pole, and the left end of the second magnet 11b is an N pole and the right end is an S pole. The current direction in the first voice coil 12a is clockwise, and the left end of the temporary magnet formed by the first magnetic conductive part 211a is an S pole and the right end is an N pole, so that the first magnetic conductive part 211a can be attracted by the first magnet 11a to move to the left; the current direction in the second voice coil 12b is counterclockwise, and the left end of the temporary magnet formed by the second magnetic conductive part 211b is an N pole and the right end is an S pole. The second magnetic conductive part 211b can be attracted by the second magnet 11b to move to the right, and the two magnetic conductive parts 211 move away from each other to deform the deformation part 212 and drive the sound membrane 22 to move downward.

[0055] On the contrary, when the current direction in the first voice coil 12a is counterclockwise and the current direction in the second voice coil 12b is clockwise, the left end of the temporary magnet formed by the first magnetic conductive part 211a is an N pole and the right end is an S pole, and the left end of the temporary magnet formed by the second magnetic conductive part 211b is an S pole and the right end is an N pole. Thus, the first magnetic conductive part 211a can be repelled by the first magnet 11a to move rightward, and the second magnetic conductive part 211b can be repelled by the second magnet 11b to move leftward, and the two magnetic conductive parts 211 approach each other to deform the deformation part 212 and drive the sound membrane 22 to move upward.

[0056] The present embodiment does not limit the arrangement of the magnetic poles of the two magnets 11 and the direction in which the voice coil 12 is energized. It is sufficient that the induced magnetic field formed on the left and right sides can drive the first magnetic conductive portion 211a and the second magnetic conductive portion 211b to move closer to or farther from each other.

[0057] In some embodiments, please refer to Figure 3 and Figure 4 The movable rod 21 includes a first magnetic conductive part 211a, a deformation part 212, and a second magnetic conductive part 211b connected in sequence. The first magnetic conductive part 211a and the second magnetic conductive part 211b are straight structures along the left and right directions, and the deformation part 212 adopts an inverted V-shaped structure, specifically including a first folding plate 2121 and a second folding plate 2122. One end of the first folding plate 2121 is connected to one end of the second folding plate 2122 to form the left part of the inverted V-shaped structure. The other end of the first folding plate 2121 is connected to the first magnetic conductive part 211a to ensure that the movement of the first magnetic conductive part 211a can be transmitted to the deformation part 212. The second folding plate 2122 is opposite to the first folding plate 2121 to form the right part of the inverted V-shaped structure. The other end of the second folding plate 2122 is connected to the second magnetic conductive part 211b to also ensure that the movement of the second magnetic conductive part 211b can be transmitted to the deformation part 212. The connection point between the first folding plate 2121 and the second folding plate 2122 , i.e., the vertex of the inverted V-shaped structure, is connected to the sound membrane 22 .

[0058] The inverted V-shaped structure of the deformation portion 212 can better convert the left-right movement of the first magnetic conductive portion 211a and the second magnetic conductive portion 211b into the up-and-down vibration of the sound membrane 22, thereby reducing the energy loss during the vibration process and improving the sound conversion efficiency.

[0059] By adjusting the length and angle of the first folding plate 2121 and the second folding plate 2122, the vibration mode of the deformation portion 212 can be further optimized to better meet the acoustic requirements of the speaker 100. This helps to reduce sound distortion and improve the clarity and fidelity of the sound.

[0060] When the angle between the first folding plate 2121 and the second folding plate 2122 is too small, the space between the first folding plate 2121 and the second folding plate 2122 becomes narrow, and the deformation range of the deformation part 212 will be limited when it is subjected to the force in the left and right directions. Due to the limited deformation range, the up and down vibration amplitude of the sound membrane 22 will also be reduced accordingly, which may lead to a reduction in the output power of the sound. When the angle between the first folding plate 2121 and the second folding plate 2122 is too large, the space between the first folding plate 2121 and the second folding plate 2122 becomes too spacious, and the deformation part 212 may produce unnecessary distortion or deformation when it is subjected to the force in the left and right directions. Such distortion or deformation will reduce the efficiency of the deformation part 212 and may cause sound distortion.

[0061] In some embodiments, the angle formed between the first folding plate 2121 and the second folding plate 2122 can be set to 60° to 120°. Within this angle range, the space between the first folding plate 2121 and the second folding plate 2122 is moderate, and the deformation portion 212 can deform freely. That is, when the first magnetic conductive portion 211a and the second magnetic conductive portion 211b are subjected to left and right forces, the deformation portion 212 can fully convert these forces into the up and down vibration of the sound membrane 22, reduce the energy loss during the vibration process, and improve the vibration efficiency.

[0062] In some embodiments, the first folding plate 2121 and the second folding plate 2122 can be symmetrically arranged, that is, the first folding plate 2121 and the second folding plate 2122 are consistent in length, width, thickness, and material, but in opposite directions. The symmetrically arranged first folding plate 2121 and the second folding plate 2122 enable the deformation part 212 to evenly distribute the forces to the first folding plate 2121 and the second folding plate 2122 when subjected to left and right forces; it can ensure that the deformation part 212 maintains balance during vibration, avoids adverse conditions such as polarization or distortion, and is conducive to improving the clarity and fidelity of the sound.

[0063] like Figure 1 and Figure 4As shown, the connection between the first folded plate 2121 and the second folded plate 2122 forms a connection protrusion 2123, which protrudes in an arc toward the sound membrane 22, and the vertex of the connection protrusion 2123 is connected to the sound membrane 22. The connection between the first folded plate 2121 and the second folded plate 2122 is set as an arc-shaped structure protruding toward the sound membrane 22, so that the connection with the sound membrane 22 can be relatively smooth, avoiding damage to the sound membrane 22. In addition, the arc-shaped connection protrusion 2123 can disperse stress, so that the force during deformation is evenly distributed on the connection protrusion 2123 instead of being concentrated at one point, thereby improving the durability of the entire movable rod 21.

[0064] The thickness of the connecting protrusion 2123 is less than the thickness of the first folding plate 2121 and the thickness of the second folding plate 2122. The connecting protrusion 2123 has a smaller thickness than the first folding plate 2121 and the second folding plate 2122. When subjected to external force, the connecting protrusion 2123 is more likely to deform, thereby achieving a flexible response during vibration sound generation. The first folding plate 2121 and the second folding plate 2122 are thicker and have higher rigidity. When subjected to external force, the first folding plate 2121 and the second folding plate 2122 are more inclined to move as a whole rather than deform. When the deformation portion 212 is subjected to the force from the magnetic conductive portion 211, the first folding plate 2121 and the second folding plate 2122 will be pushed or pulled to move. This movement will squeeze or pull the connecting protrusion 2123, causing the connecting protrusion 2123 to deform, thereby changing the angle between the first folding plate 2121 and the second folding plate 2122.

[0065] Specifically, when the two magnetic conductive parts 211 approach each other, the angle formed by the first folding plate 2121 and the second folding plate 2122 decreases, causing the top of the connecting protrusion 2123 to rise, thereby pushing the sound membrane 22 to move upward and pushing the air to diffuse outward; when the two magnetic conductive parts 211 move away from each other, the angle formed by the first folding plate 2121 and the second folding plate 2122 increases, causing the top of the connecting protrusion 2123 to lower, thereby pulling the sound membrane 22 to move downward, pushing the air inward to be compressed, and vibrating to produce sound.

[0066] The magnetic conductive part 211 can be made of magnetic conductive materials such as iron, cobalt, alloy, etc., or can be made of magnetic conductive plastic. These materials have high saturation magnetic induction intensity and high magnetic permeability, and can effectively transmit and concentrate the magnetic field. The deformation part 212 can also be made of magnetic conductive materials or non-magnetic conductive materials, for example, it can be made of stainless steel, aluminum alloy and other materials. It should be noted that no matter what material is used, the deformation part 212 needs to have a certain strength and toughness to ensure that it can be stably deformed under the action of the magnetic field.

[0067] The movable rod 21 can be an integrated structure or a split structure. In the case of a split structure, the magnetic conductive part 211 and the deformable part 212 are fixed together by riveting, inserting, bonding, welding, etc. to ensure effective transmission of the force.

[0068] It should be noted that when the movable rod 21 adopts an integrated structure, the left end of the first magnetic conductive part 211a and the right end of the second magnetic conductive part 211b have opposite polarities, so it can only adapt to the situation where the magnetic poles on the opposite sides of the first magnet 11a and the second magnet 11b are opposite and the current-carrying directions of the first voice coil 12a and the second voice coil 12b are the same.

[0069] When the movable rod 21 adopts a split structure and the deformation part 212 is made of non-magnetic conductive material, the polarities of the first magnetic conductive part 211a and the second magnetic conductive part 211b do not interfere with each other, so it can be applicable to the above-mentioned various arrangements of the magnet 11 and the voice coil 12.

[0070] Understandably, if Figure 1 and Figure 5 As shown, the voice coil 12 is formed by winding an enameled wire, and has a hollow channel in the middle. The hollow channel of the voice coil 12 extends in the left-right direction, and the magnetic conductive part 211 extends into the corresponding hollow channel of the voice coil 12. When both voice coils 12 are not powered, the end of the magnetic conductive part 211 should be exposed from the corresponding voice coil 12, so that when the two magnetic conductive parts 211 are close to each other, there is still enough magnetic conductive structure in the induced magnetic field formed by the voice coil 12; there should also be a certain space between the end of the magnetic conductive part 211 and the corresponding magnet 11, so as to ensure that the magnetic conductive part 211 has a certain movement space in the left-right direction.

[0071] The hollow channel of the voice coil 12 can be filled with a magnetic fluid 30, which connects the voice coil 12 and the corresponding magnetic conductive part 211. Due to its own characteristics, the magnetic fluid 30 can be adsorbed between the voice coil 12 and the magnetic conductive part 211, thereby playing a flexible supporting role for the magnetic conductive part 211, which is beneficial to improve the stability of the upper and lower positions of the magnetic conductive part 211 and reduce the shaking and deviation of the movable rod 21 when it moves. In addition, the magnetic fluid 30 can also reduce the friction and collision between the movable rod 21 and the voice coil 12 or other components, thereby reducing the generation of noise, which is beneficial to improving the sound quality of the speaker 100 and making the sound effect purer and clearer.

[0072] In addition, the magnetic fluid 30 itself has magnetism, and can enhance the induced magnetic field generated by the voice coil 12 being energized, thereby facilitating improving the sensitivity of the speaker 100 .

[0073] In other embodiments, a support structure may be provided to support the speaker 100 in the vertical direction, and the magnetic conductive portion 211 may be slidably connected to the support structure along the left-right direction, which is not limited in this embodiment.

[0074] In some embodiments, the speaker 100 may further include a housing, the housing forming a mounting cavity with an opening, the magnet 11 and the voice coil 12 are both disposed in the mounting cavity, and the edge of the sound membrane 22 is connected to the edge of the opening. The housing may protect the internal structure and form a mounting base for the sound membrane 22. The housing may also be a part of an electronic device housing, and the speaker 100 may be directly assembled based on the electronic device.

[0075] like Figure 1 , Figure 6 and Figure 7 As shown, the shape of the sound membrane 22 and the shape of the opening can be consistent, which is conducive to reducing the distortion and scattering of the sound during propagation, thereby improving the clarity and fidelity of the sound. For example, the sound membrane 22 can be square, circular, or other regular or irregular shapes.

[0076] The sound film 22 has a middle rigid part and an edge folded ring part. The middle rigid part can efficiently transfer energy, reduce unnecessary vibration and distortion, and produce clear and accurate sound. The edge folded ring part is a folded ring 221 arranged at the edge of the middle rigid part. The folded ring 221 can provide a smooth transition, so that the sound film 22 can better coordinate with the mounting structure when vibrating, so that the sound film 22 remains stable when vibrating. At the same time, the folded ring 221 has a certain elasticity, which can reduce deformation and damage caused by vibration.

[0077] The deformation of the movable rod 21 is bonded to the sound membrane 22 by glue, for example, polyurethane glue or epoxy resin glue can be used to bond the movable rod 21 and the sound membrane 22. The deformation portion 212 of the movable rod 21 can be connected to the center position of the sound membrane 22, so as to improve the uniformity and symmetry of the sound when it is emitted, and help reduce the distortion and noise of the sound. In actual applications, due to design requirements, manufacturing tolerances or installation adjustments, there may be a certain deviation in the connection position between the deformation portion 212 of the movable rod 21 and the sound membrane 22.

[0078] In some embodiments, Figures 1 to 3 As shown, the housing may include a bottom plate 40 and an upper plate 50 , and a mounting cavity is formed between the bottom plate 40 and the upper plate 50 .

[0079] In some embodiments, Figure 2 and Figure 5 As shown, the bottom plate 40 has a strip groove 41 extending in the left-right direction, the opening direction of the strip groove 41 is set upward, and the two magnets 11 and the two voice coils 12 are arranged in the strip groove 41. The bottom plate 40 provides a mounting base for the magnets 11 and the voice coils 12, and defines the positions of the magnets 11 and the voice coils 12. The sound film 22 is located on the opening side of the strip groove 41, and the deformation part 212 of the movable rod 21 extends from the opening of the strip groove 41 and is connected to the sound film 22.

[0080] The bottom plate 40 is U-shaped in a cross section perpendicular to the left-right direction, that is, the bottom plate 40 includes a base plate 42 and two side plates 43. The two side plates 43 are arranged opposite to each other, and the lower ends of the two side plates 43 are connected by the base plate 42. An opening is formed between the upper ends of the two side plates 43, so that a strip groove 41 is formed between the base plate 42 and the two side plates 43.

[0081] Please refer to Figure 3 , the first magnet 11a is arranged at the left end of the strip groove 41, the second magnet 11b is arranged at the right end of the strip groove 41, and the two magnets 11 can be bonded to the substrate 42 by glue. In order to adapt to the shape of the strip groove 41, the voice coil 12 can be a flat structure, and the lower structure of the voice coil 12 can also be bonded to the substrate 42 by glue. This reduces the risk of the magnet 11 and the voice coil 12 moving and falling off.

[0082] The shape of the strip groove 41 can match the shapes of the magnet 11 and the voice coil 12, which is equivalent to using the magnet 11 to block both ends of the strip groove 41, which is conducive to arranging the speaker 100 structure more compactly and reducing space occupation.

[0083] The bottom plate 40 may be made of magnetic conductive materials such as iron, cobalt, alloy, etc., or may be made of plastic, which is not limited in this embodiment.

[0084] In the case where the shell is a structure different from the outer shell of the electronic device, an integrated structure is formed by installing the magnet 11, voice coil 12, movable rod 21, etc. on the base plate 40; it is convenient to independently process the speaker 100, and the performance and stability tests can be carried out before the speaker 100 is assembled to the electronic device, and the speaker 100 only needs to be assembled to the electronic device later.

[0085] When the shell is part of an electronic device housing, a strip groove 41 is formed on the shell to determine the installation positions of structures such as the magnet 11 and the voice coil 12, thereby making the overall structure of the speaker 100 more compact and integrated, which helps to reduce space occupancy and improve aesthetics.

[0086] In some embodiments, Figures 1 to 3As shown, the upper plate 50 is arranged at the opening of the bottom plate 40, and the downward projection of the upper plate 50 can at least cover the magnet 11 and the voice coil 12, thereby protecting the key components such as the magnet 11 and the voice coil 12 installed inside the strip groove 41. And when the voice coil 12 is filled with magnetic fluid 30, the space surrounded by the upper plate 50, the lower plate and the magnet 11 can prevent the leakage of the magnetic fluid 30. The upper plate 50 has a avoidance opening 52 connected to the strip groove 41, and the deformation part 212 can pass through the avoidance opening 52 to connect with the sound membrane 22. The shape and size of the avoidance opening 52 can be set according to the specific structure and size of the deformation part 212, and sufficient space is reserved for the movement of the deformation part 212, ensuring that the first folding plate 2121 and the second folding plate 2122 can pass freely without hindrance.

[0087] In the first example of the above embodiment, the upper plate 50 can be an integral structure, and the upper plate 50 is an annular structure as a whole, and the hollow part of the annular structure is the avoidance opening 52. The upper plate 50 is connected to the top surfaces of the two side plates 43 to form a stable frame, thereby improving the stability of the entire speaker 100 structure. The upper plate 50 can also be connected to the top surfaces of the magnet 11 and the voice coil 12, which helps to further fix the magnet 11 and the voice coil 12 and prevent the magnet 11 and the voice coil 12 from being displaced or loosened during vibration.

[0088] In the second example of the above embodiment, the upper plate 50 may also be a split structure, that is, the upper plate 50 includes two plate bodies 51 spaced apart in the left-right direction. For the convenience of description, the two plate bodies 51 are respectively a first plate body 51a and a second plate body 51b, and a avoidance opening 52 is formed between the first plate body 51a and the second plate body 51b. The first plate body 51a is arranged in the strip groove 41, and the two sides of the first plate body 51a are connected to the two side walls of the strip groove 41, and the first plate body 51a is connected to the top surface of the first magnet 11a and the first voice coil 12a; the second plate body 51b is arranged in the strip groove 41, and the two sides of the second plate body 51b are connected to the two side walls of the strip groove 41, and the second plate body 51b is connected to the second magnet 11b and the top surface of the second voice coil 12b; by fixing the two plate bodies 51 in the strip groove 41 and closely connected with the magnet 11 and the voice coil 12, the stability of the entire structure is enhanced.

[0089] The integral upper plate 50 in the first example can also be arranged in the strip groove 41 and connected to the two side walls of the strip groove 41; the split upper plate 50 in the second example can also be fixed by connecting the upper plate 50 to the top surface of the side plate 43; this embodiment does not limit the structure of the upper plate 50 and the connection relationship between the upper plate 50 and the bottom plate 40. When the upper plate 50 is installed in the strip groove 41, the top surface of the upper plate 50 can be flush with or protrude from the top surfaces of the two side plates 43, and this embodiment does not limit this.

[0090] The upper plate 50 may be made of magnetic conductive materials such as iron, cobalt, alloy, etc., or may be made of plastic, which is not limited in this embodiment.

[0091] In other embodiments, the housing may not have the upper plate 50, that is, the opening of the bottom plate 40 is not blocked. The design without the upper plate 50 further simplifies the overall structure of the speaker 100. Since the upper plate 50 is removed, the production and assembly process will be simpler.

[0092] The present application also provides an electronic device, which includes the above-mentioned speaker 100. Thanks to the improvements on the speaker 100 in the above-mentioned embodiments, the electronic device in the second embodiment of the present invention has the same technical effects as the speaker 100 in the above-mentioned embodiments, which will not be described in detail here.

[0093] The electronic device may be a headset, OWS headset or other headphone device, or may be a smart glasses, VR device, AR device or other product. The electronic device usually has a sound outlet, and the sound membrane 22 is arranged opposite to the sound outlet. In order to ensure the sound quality, the size of the sound outlet may be larger than the size of the sound membrane 22. Such a design can avoid the sound outlet path being blocked or diffuse reflection, thereby ensuring the clarity and purity of the sound quality.

[0094] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present invention. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

Claims

1. A speaker, characterized in that: The speaker comprises: A magnetic circuit system, comprising two magnets and two voice coils, wherein the two magnets are arranged opposite to each other along a first direction, and the two voice coils are arranged between the two magnets along the first direction at intervals; A vibration system, comprising a moving rod and a sound membrane, wherein the moving rod comprises two magnetic conductive parts and a deformation part connecting the two magnetic conductive parts, the two magnetic conductive parts extend into the two voice coils in a one-to-one correspondence, and the deformation part is connected to the sound membrane; The two voice coils are used to energize and drive the two magnetic conductive parts to move closer to or farther from each other, so that the deformation part is deformed and drives the sound membrane to vibrate and produce sound along a second direction; the first direction is perpendicular to the second direction.

2. The speaker according to claim 1, characterized in that: The deformation part includes a first folding plate and a second folding plate arranged at an angle, the connection between the first folding plate and the second folding plate is connected to the sound membrane, the end of the first folding plate away from the second folding plate is connected to one of the magnetic conductive parts, and the end of the second folding plate away from the first folding plate is connected to the other magnetic conductive part.

3. The speaker according to claim 2, characterized in that: The angle formed between the first folding plate and the second folding plate is 60° to 120°; and / or, The first folding plate and the second folding plate are symmetrically arranged.

4. The speaker according to claim 2, characterized in that: A connecting protrusion is formed at the connection between the first folding plate and the second folding plate. The connecting protrusion protrudes in an arc shape toward the sound membrane, and the apex of the connecting protrusion is connected to the sound membrane. The thickness of the connecting protrusion is smaller than the thickness of the first folding plate and the thickness of the second folding plate.

5. The speaker according to claim 1, characterized in that: The voice coil is filled with magnetic fluid, and the magnetic fluid connects the voice coil and the corresponding magnetic conductive part.

6. The speaker according to any one of claims 1 to 5, characterized in that: The speaker further comprises a bottom plate, the bottom plate has a strip groove along a first direction, and the opening direction of the strip groove is arranged along a second direction; The two magnets and the two voice coils are both arranged in the strip-shaped groove, and the two magnets are respectively located at two ends of the strip-shaped groove.

7. The speaker according to claim 6, characterized in that: The speaker also includes an upper plate, which is arranged at the opening of the bottom plate and has a avoidance opening connected to the strip groove; the projection of the upper plate along the second direction at least covers the magnet and the voice coil, and the deformation part passes through the avoidance opening to be connected to the sound membrane.

8. The speaker according to claim 7, characterized in that: The upper plate includes two plate bodies spaced apart along a first direction, and the avoidance opening is formed between the two plate bodies; the plate bodies are connected one by one to the side of the magnet facing away from the bottom plate, and an installation space for accommodating the voice coil is formed between the plate bodies, the magnet and the bottom plate.

9. The speaker according to any one of claims 1 to 5, characterized in that: The magnetic poles on opposite sides of the two magnets are opposite, and the current-carrying directions of the two voice coils are the same.

10. An electronic device, characterized in that: The electronic device comprises the speaker according to any one of claims 1 to 9.

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