Loudspeaker and electronic equipment

Abstract

The utility model discloses a loudspeaker and an electronic device, the loudspeaker comprises a magnetic circuit system and a vibration system, the magnetic circuit system comprises a magnet and two voice coils, the two voice coils are arranged at intervals along a first direction, and the magnet is arranged between the two voice coils; 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. According to the utility model, 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 utility model relates to a loudspeaker technical field especially relates to a loudspeaker and electronic equipment. BACKGROUND

[0002] In the related art, a moving-iron loudspeaker utilizes an electromagnet to generate an alternating magnetic field. When an audio signal flows through the electromagnet, it causes a change in the electromagnet's magnetic field, which in turn drives an iron sheet suspended in front of the electromagnet to vibrate and produce sound. However, the internal structure of the conventional moving-iron loudspeaker is extremely delicate and complex, requiring extremely high production equipment and processes. 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 results in high production costs and low efficiency for the conventional moving-iron loudspeaker. Moreover, the vibration area of the moving-iron loudspeaker is relatively small, making it difficult to generate sufficient low-frequency energy, thereby affecting the overall sound quality performance. SUMMARY

[0003] The utility model aims at least solves one of the prior art technical problems. For this purpose, the utility model provides a loudspeaker, which can directly drive a diaphragm to vibrate by transmitting force through a moving rod, while ensuring the transient response of the loudspeaker, providing sufficient low-frequency energy, and thereby improving the overall sound quality performance of the loudspeaker.

[0004] The utility model further provides an electronic device having the above-mentioned loudspeaker.

[0005] According to the loudspeaker of the first aspect of the utility model, the loudspeaker comprises: a magnetic circuit system comprising a magnet and two voice coils, the two voice coils being arranged at intervals along a first direction, and the magnet being arranged between the two voice coils; a vibration system comprising a moving rod and a diaphragm, the moving rod comprising two magnetic conductive portions and a deformation portion connecting the two magnetic conductive portions, the two magnetic conductive portions being inserted into the two voice coils one by one, and the deformation portion being connected to the diaphragm; wherein the two voice coils are used to drive the two magnetic conductive portions to approach or move away from each other to deform the deformation portion and drive the diaphragm to vibrate along a second direction to produce sound; and the first direction is perpendicular to the second direction.

[0006] According to the loudspeaker, the two voice coils are electrified to form an induced magnetic field, the magnetic conductive parts form temporary magnets under the action of the corresponding induced magnetic field, and the temporary magnets are attracted or repelled to move in a first direction, the deformation part converts the force of the two magnetic conductive parts in the first direction into deformation in a second direction, so as to drive the diaphragm to vibrate; the loudspeaker can guarantee the transient response ability of the loudspeaker; and the second direction displacement of the deformation part can proportionally scale the left-right direction displacement of the two magnetic conductive parts, so that the left-right direction displacement of the two magnetic conductive parts is converted into large-amplitude vibration of the diaphragm, especially in a low frequency band, the energy output of the low frequency band is increased, and the performance of the loudspeaker in the low frequency band is improved.

[0007] According to some embodiments of the utility model, the deformation part is a non-ferromagnetic structure.

[0008] According to some embodiments of the utility model, the deformation part includes first and second folding plates arranged at an included angle, the connection between the first and second folding plates is connected with the diaphragm, one end of the first folding plate away from the second folding plate is connected with one of the magnetic conductive parts, and one end of the second folding plate away from the first folding plate is connected with the other magnetic conductive part.

[0009] According to some embodiments of the utility model, one end of the first folding plate away from the second folding plate is provided with a connecting folding plate, and the connecting folding plate and part of the structure of the corresponding magnetic conductive part are arranged in a stacking mode along the second direction.

[0010] According to some embodiments of the utility model, the magnetic conductive part is located on the side of the connecting folding plate facing the diaphragm; or the connecting folding plate has a clamping groove opening in the first direction, and the end of the magnetic conductive part extends into the clamping groove.

[0011] According to some embodiments of the utility model, the included angle formed between the first and second folding plates is 60° to 120°; and / or, the first and second folding plates are symmetrically arranged.

[0012] According to some embodiments of the utility model, the connection between the first and second folding plates forms a connecting protrusion, the connecting protrusion is arc-shaped and protrudes towards the diaphragm, the apex of the connecting protrusion is connected with the diaphragm, and the thickness of the connecting protrusion is less than the thickness of the first folding plate and the thickness of the second folding plate.

[0013] According to some embodiments of the utility model, the voice coil is filled with a magnetic fluid, and the magnetic fluid connects the voice coil and the corresponding magnetic conductive part.

[0014] According to some embodiments of the utility model, the loudspeaker further comprises a shell, the shell has a mounting cavity extending in a first direction, a side surface of the shell in a second direction has an avoiding opening communicated with the mounting cavity; two voice coils are respectively located at two ends of the strip-shaped groove, the magnet is arranged opposite to the avoiding opening, and the deformation part is connected with the diaphragm through the avoiding opening.

[0015] According to the electronic device of the second aspect embodiment of the utility model, the electronic device comprises the loudspeaker as above.

[0016] According to the electronic device of the utility model embodiment, at least has following beneficial effect: the loudspeaker of electronic device can drive diaphragm vibration directly through the action force of moving rod, guarantees the transient response of loudspeaker at the same time, provides sufficient low frequency energy, thereby improves overall sound quality performance.

[0017] Additional aspects and advantages of the utility model will be partially given in the following description, some will become obvious from the following description, or be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0018] The utility model will be further explained in combination with the drawings and examples, wherein:

[0019] Figure 1 It is cross section structure schematic drawing of loudspeaker in the utility model embodiment;

[0020] Figure 2 It is structure schematic drawing of loudspeaker after removing diaphragm in the utility model embodiment;

[0021] Figure 3 It is magnetic pole schematic drawing of voice coil energization state of loudspeaker in the utility model embodiment;

[0022] Figure 4 It is structure schematic drawing of moving rod in the utility model embodiment;

[0023] Figure 5 It is cross section structure schematic drawing of loudspeaker in the utility model embodiment;

[0024] Figure 6 It is structure schematic drawing of diaphragm in one embodiment of the utility model;

[0025] Figure 7 It is structure schematic drawing of diaphragm in another embodiment of the utility model.

[0026] Reference signs:

[0027] 100, loudspeaker;

[0028] 10, magnetic circuit system; 11, magnet; 12, voice coil; 12a, first voice coil; 12b, second voice coil;

[0029] 20, vibration system; 21, moving rod; 211, magnetic conducting part; 211a, first magnetic conducting part; 211b, second magnetic conducting part; 212, deformation part; 2121, first folding plate; 2122, second folding plate; 2123, connecting folding plate; 2124, connecting protrusion; 22, diaphragm; 221, folding ring;

[0030] 30, magnetic fluid;

[0031] 40, bottom plate; 41, strip-shaped slot; 42, base plate; 43, side plate. DETAILED DESCRIPTION

[0032] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0033] In the description of the present application, it is understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation of the present application.

[0034] In the description of the present application, the meaning of several is more than one, the meaning of multiple is more than two, greater than, less than, more than, etc. are understood as not including the number, above, below, etc. are understood as including the number. If it is described as first, second, it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.

[0035] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical scheme.

[0036] In the description of the present utility model, the description of the reference terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are contained in at least one embodiment or example of the present utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0037] As shown in the figure, the utility model provides a loudspeaker 100, in some embodiments, the loudspeaker 100 includes magnetic circuit system 10 and vibration system 20. Magnetic circuit system 10 usually includes magnet 11 and voice coil 12, magnet 11 provides stable magnetic field, when voice coil 12 is electrified and will produce induced magnetic field, induced magnetic field can act on vibration system 20 and form temporary magnet 11, thereby being attracted or repelled by magnet 11 and forming vibration sound production. Figure 1 In the embodiment, as shown in the figure, magnetic circuit system 10 includes a magnet 11 and two voice coils 12. For the convenience of description, two voice coils 12 are defined as first voice coil 12a and second voice coil 12b respectively. First voice coil 12a and second voice coil 12b are arranged at intervals along the first direction, and magnet 11 is located between first voice coil 12a and second voice coil 12b. That is, first voice coil 12a, magnet 11, second voice coil 12b are sequentially arranged along the first direction, and there is a certain distance between first voice coil 12a and magnet 11, and there is a certain distance between second voice coil 12b and magnet 11.

[0038] Figures 1 to 3 The first direction is the left-right direction in the figure, and first voice coil 12a forms an induced magnetic field on the left side, and second voice coil 12b forms an induced magnetic field on the right side.

[0039] Figure 1

[0040] Vibration system 20 includes dynamic rod 21 and sound film 22, dynamic rod 21 includes two magnetic conductive parts 211 and deformation part 212 connecting two magnetic conductive parts 211, for the convenience of description, two magnetic conductive parts 211 are defined as first magnetic conductive part 211a and second magnetic conductive part 211b respectively, then dynamic rod 21 includes sequentially connected first magnetic conductive part 211a, deformation part 212 and second magnetic conductive part 211b, and deformation part 212 is connected with sound film 22. First magnetic conductive part 211a extends into first voice coil 12a, and second magnetic conductive part 211b extends into second voice coil 12b. That is, first magnetic conductive part 211a and second magnetic conductive part 211b are arranged at intervals along the first direction; and when first voice coil 12a and second voice coil 12b are electrified, first magnetic conductive part 211a forms a temporary magnet under the action of the induced magnetic field on the left side, and second magnetic conductive part 211b forms a temporary magnet under the action of the induced magnetic field on the right side.​​​

[0041] The first magnetic conducting part 211a is attracted by the magnet 11 to move right, and the second magnetic conducting part 211b is attracted by the magnet 11 to move left, so that the first magnetic conducting part 211a and the second magnetic conducting part 211b approach each other; the force is transmitted to the deformation part 212, and the deformation part 212 is deformed under the force to drive the diaphragm 22 to move upward.

[0042] Conversely, by changing the direction of the current flowing through the first voice coil 12a and the second voice coil 12b, the first magnetic conducting part 211a is repelled by the magnet 11 to move left, and the second magnetic conducting part 211b is repelled by the magnet 11 to move right, so that the first magnetic conducting part 211a and the second magnetic conducting part 211b move away from each other; the force is transmitted to the deformation part 212, and the deformation part 212 is deformed under the force to drive the diaphragm 22 to move downward. Thus, the diaphragm 22 can be driven to vibrate in the second direction by the moving rod 21. Of course, the deformation part 212 can also drive the diaphragm 22 to move downward by the first magnetic conducting part 211a and the second magnetic conducting part 211b approaching each other, and the deformation part 212 can drive the diaphragm 22 to move upward by the first magnetic conducting part 211a and the second magnetic conducting part 211b moving away from each other, which is not limited in the embodiment.

[0043] In actual application, audio signals are connected to the first voice coil 12a and the second voice coil 12b, which are converted into continuous changing currents, and then the first voice coil 12a and the second voice coil 12b generate continuous changing induction magnetic fields; so as to quickly adjust the polarity and strength of the induction magnet formed by the first magnetic conducting part 211a and the second magnetic conducting part 211b, and the first magnetic conducting part 211a and the second magnetic conducting part 211b are respectively moved to different positions under the action of the magnet 11 and transmitted to the deformation part 212, and the deformation part 212 converts the left and right direction forces of the two side magnetic conducting parts 211 into deformation in the up and down direction, thereby driving the diaphragm 22 to vibrate. That is, in the embodiment, the change of the induction magnetic field drives the moving rod 21 to move and deform, and the moving rod 21 directly drives the diaphragm 22 to vibrate and sound, which can guarantee the transient response ability of the loudspeaker 100. Moreover, the displacement of the deformation part 212 in the up and down direction in the embodiment is not absolutely equal to the displacement of the two side magnetic conducting parts 211 in the left and right directions, but can scale the proportion of the displacement of the two side magnetic conducting parts 211 in the left and right directions. Thus, it is beneficial to convert the left and right direction displacement of the two side magnetic conducting parts 211 into large amplitude vibration of the diaphragm 22, especially in the low frequency band, which can increase the energy output in the low frequency band and improve the performance of the loudspeaker 100 in the low frequency band.

[0044] Compared with the traditional U-shaped iron sheet and moving rod 21 structure to realize transmission, the structure of the loudspeaker 100 in the embodiment is significantly simplified. Specifically, in the embodiment, the mutual nesting relationship between the U-shaped iron sheet, the magnet 11, and the voice coil 12 in the traditional loudspeaker 100 is cancelled, and a simple spacing arrangement is used instead. This design reduces interference between components and reduces the difficulty of the production process. Moreover, the installation of the moving rod 21 can be realized by compressing the deformation part 212 to restore the deformation after the moving rod 21 is placed between the two voice coils 12, which can make the assembly process of the loudspeaker 100 simpler and more efficient.

[0045] The loudspeaker 100 in the embodiment can be applied to electronic devices, such as various earphone devices such as headphones, OWS earphones (Open Wearable Stereo, true wireless stereo earphones), and the like, and can also be applied to smart glasses, VR (Virtual Reality) devices, AR (Augmented Reality) devices, and the like. It should be noted that in order to meet the size and performance requirements of different electronic devices, the volume of the loudspeaker 100 and the vibration area of the diaphragm 22 can be designed according to the actual situation. The loudspeaker 100 can adapt to various application scenarios and provide 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, which is only an example for illustration and convenience for subsequent description. In actual application, the first direction and the second direction can be determined according to the actual installation position and sound emitting direction of the loudspeaker 100.

[0047] It has been explained that the magnet 11 generates a stable magnetic field, and the voice coil 12 generates an induced magnetic field by being energized, so that the first magnetic guide part 211a and the second magnetic guide part 211b form a temporary magnet, and the first magnetic guide part 211a and the second magnetic guide part 211b move under the action of the magnet 11. The following will be described in detail.

[0048] The two poles of the magnet 11 along the first direction are S pole and N pole, for example, as shown in Figure 3 The left end of the magnet 11 is S pole, the right end is N pole, and the current direction in the first voice coil 12a and the second voice coil 12b is counterclockwise. When the first magnetic guide part 211a forms a temporary magnet, the left end is N pole, and the right end is S pole. The second magnetic guide part 211b forms a temporary magnet, the left end is N pole, and the right end is S pole. Thus, the first magnetic guide part 211a can be repelled by the S pole of the magnet 11 to move to the left, and the second magnetic guide part 211b can be repelled by the N pole of the magnet 11 to move to the right. The two magnetic guide parts 211 move away from each other, causing the deformation part 212 to deform and drive the diaphragm 22 to move downward.

[0049] Conversely, when the current directions of the first voice coil 12a and the second voice coil 12b are clockwise, the left end of the temporary magnet formed by the first magnetic guide part 211a is an S pole, and the right end is an N pole, and the left end of the temporary magnet formed by the second magnetic guide part 211b is an S pole, and the right end is an N pole. Thus, the first magnetic guide part 211a can be attracted to the right by the S pole of the magnet 11, and the second magnetic guide part 211b can be attracted to the left by the N pole of the magnet 11, and the two magnetic guide parts 211 approach each other to deform the deformation part 212 to drive the diaphragm 22 to move upward.

[0050] In the present example, clockwise and counterclockwise are Figure 1 the directions along the viewing angle from left to right.

[0051] In other examples, the magnet 11 can also have an N pole on the left end and an S pole on the right end, and the present embodiment does not limit this. As long as the induced magnetic fields formed on the left and right sides can drive the first magnetic guide part 211a and the second magnetic guide part 211b to approach or move away from each other.

[0052] In some embodiments, please refer to Figure 3 and Figure 4 The moving rod 21 includes a first magnetic guide part 211a, a deformation part 212, and a second magnetic guide part 211b connected in sequence. The first magnetic guide part 211a and the second magnetic guide part 211b are both ferromagnetic materials, and the deformation part 212 is a non-ferromagnetic structural member. Since the magnet 11 is centrally arranged, the deformation part 212 is closer to the magnet 11. Using a non-ferromagnetic structural member as the deformation part 212 can avoid the deformation of the deformation part 212 caused by the magnet 11, and ensure that the deformation part 212 is driven to deform by the force of the magnet 11 on the magnetized magnetic guide part 211 by the voice coil 12, thereby realizing the vibration and sound emission of the diaphragm 22.

[0053] Specifically, the magnetic guide part 211 can be made of iron, cobalt, alloy, or other magnetic conductive materials, or can be made of magnetic conductive plastic. Some materials have high saturation magnetic induction and high magnetic permeability, which can effectively transfer and concentrate the magnetic field. Since the magnetic guide part 211 and the deformation part 212 are made of different materials, i.e., the moving rod 21 adopts a split structure. The magnetic guide part 211 and the deformation part 212 are fixed together by riveting, embedding, bonding, welding, etc., to ensure effective transmission of the force.

[0054] The first magnetic conducting part 211a and the second magnetic conducting part 211b are flat structures along the left-right direction, and the deformation part 212 adopts an inverted V-shaped structure, which specifically includes a first folded plate 2121 and a second folded plate 2122. One end of the first folded plate 2121 is connected to one end of the second folded plate 2122, forming the left part of the inverted V-shaped structure. The other end of the first folded plate 2121 is connected to the first magnetic conducting part 211a, ensuring that the movement of the first magnetic conducting part 211a can be transmitted to the deformation part 212. The second folded plate 2122 is opposite to the first folded plate 2121, forming the right part of the inverted V-shaped structure. The other end of the second folded plate 2122 is connected to the second magnetic conducting part 211b, which also ensures that the movement of the second magnetic conducting part 211b can be transmitted to the deformation part 212. The connection point of the first folded plate 2121 and the second folded plate 2122, i.e. the top point of the inverted V-shaped structure, is connected to the diaphragm 22.

[0055] The deformation part 212 is arranged in an inverted V-shaped structure, which can better convert the left-right movement of the first magnetic conducting part 211a and the second magnetic conducting part 211b into the up-down vibration of the diaphragm 22. Thus, the energy loss during vibration is reduced, and the sound conversion efficiency is improved.

[0056] In some embodiments, the first folded plate 2121 and the second folded plate 2122 can be fixedly installed with the magnetic conducting plate by bonding, so as to realize effective transmission of force and movement.

[0057] In order to enhance the reliability of the connection, the end of the first folded plate 2121 away from the second folded plate 2122 is provided with a connecting folded plate 2123. The connecting folded plate 2123 and the part of the corresponding magnetic conducting part 211 are arranged in a stacked manner along the second direction (i.e. the up-down direction), which can increase the connection area and improve the stability and durability of the connection.

[0058] The magnetic conducting part 211 is located on the side of the connecting folded plate 2123 facing the diaphragm 22, i.e. the upper side of the connecting folded plate 2123. This design not only conforms to the vibration transmission path, but also ensures that the magnetic conducting part 211 can stably transmit the force to the connecting folded plate 2123 when subjected to the force of the magnet 11, thereby driving the entire dynamic rod 21 and the diaphragm 22 to vibrate.

[0059] Further, the connecting folded plate 2123 has a clamping groove opening along the left-right direction, and the end of the magnetic conducting part 211 extends into the clamping groove. This clamping groove design not only realizes the close cooperation of the magnetic conducting part 211 and the connecting folded plate 2123, but also prevents the magnetic conducting part 211 from loosening or displacing during vibration, thereby ensuring the stability and sound quality of the loudspeaker 100.

[0060] The length of the first and second folded plates 2121 and 2122 and the angle formed between the first and second folded plates 2121 and 2122 have an impact on the overall structural strength, motion transmission, vibration performance, and the like. By designing the length of the first and second folded plates 2121 and 2122 and the angle formed between the first and second folded plates 2121 and 2122, the vibration mode of the deformation portion 212 can be further optimized to better meet the acoustic requirements of the loudspeaker 100. This helps to reduce sound distortion and improve the clarity and fidelity of the sound.

[0061] When the included angle between the first and second folded plates 2121 and 2122 is too small, the space between the first and second folded plates 2121 and 2122 becomes narrow, and the deformation range of the deformation portion 212 is limited when it is subjected to a force in the left-right direction. Due to the limited deformation range, the up-down vibration amplitude of the diaphragm 22 is also reduced, which can result in a decrease in the output power of the sound. When the included angle between the first and second folded plates 2121 and 2122 is too large, the space between the first and second folded plates 2121 and 2122 becomes too spacious, and the deformation portion 212 can be unnecessarily twisted or deformed when it is subjected to a force in the left-right direction. Such twisting or deformation reduces the efficiency of the deformation portion 212 and can cause sound distortion.

[0062] In some embodiments, the included angle formed between the first and second folded plates 2121 and 2122 can be set to 60° to 120°. Within this angle range, the space between the first and second folded plates 2121 and 2122 is moderate, and the deformation portion 212 can freely deform. That is, when the first and second magnetic guide portions 211a and 211b are subjected to a force in the left-right direction, the deformation portion 212 can sufficiently convert these forces into up-down vibrations of the diaphragm 22, reduce energy loss during vibration, and improve vibration efficiency.

[0063] In some embodiments, the first and second folded plates 2121 and 2122 can be symmetrically arranged, i.e., the first and second folded plates 2121 and 2122 are consistent in length, width, thickness, material, and the like, except that the directions are opposite. The symmetrically arranged first and second folded plates 2121 and 2122 enable the deformation portion 212 to uniformly distribute forces in the left-right direction to the first and second folded plates 2121 and 2122 when subjected to these forces; ensure that the deformation portion 212 remains balanced during vibration, avoiding adverse situations such as polarization or twisting, and facilitating improved clarity and fidelity of the sound.

[0064] As Figure 1 and Figure 4As shown, the connection between the first folded plate 2121 and the second folded plate 2122 forms a connection protrusion 2124, which protrudes arcuately towards the diaphragm 22, and the vertex of the connection protrusion 2124 is connected to the diaphragm 22. The connection between the first folded plate 2121 and the second folded plate 2122 is arranged to protrude arcuately towards the diaphragm 22, so that the connection with the diaphragm 22 is relatively smooth, avoiding damage to the diaphragm 22. Moreover, the arcuate connection protrusion 2124 can disperse stress, so that the force during deformation is uniformly distributed on the connection protrusion 2124 rather than concentrated at a point, thereby improving the durability of the entire dynamic rod 21.

[0065] The thickness of the connection protrusion 2124 is smaller than the thickness of the first folded plate 2121 and the thickness of the second folded plate 2122. The connection protrusion 2124 has a smaller thickness compared to the first folded plate 2121 and the second folded plate 2122, and is more likely to deform when subjected to external force, thereby achieving flexible response during vibration and sound production. The thickness of the first folded plate 2121 and the second folded plate 2122 is larger, and has higher rigidity. When subjected to external force, the first folded plate 2121 and the second folded plate 2122 are more inclined to move as a whole rather than deform. When the deformation part 212 is subjected to the force from the magnetically conductive part 211, the first folded plate 2121 and the second folded plate 2122 are pushed or pulled to move. This movement will squeeze or pull the connection protrusion 2124, causing the connection protrusion 2124 to deform, thereby changing the included angle between the first folded plate 2121 and the second folded plate 2122.

[0066] Specifically, when the two magnetically conductive parts 211 approach each other, the included angle formed by the first folded plate 2121 and the second folded plate 2122 decreases, prompting the vertex of the connection protrusion 2124 to rise, thereby pushing the diaphragm 22 to move upwards and pushing the air to diffuse outward; when the two magnetically conductive parts 211 move away from each other, the included angle formed by the first folded plate 2121 and the second folded plate 2122 increases, prompting the vertex of the connection protrusion 2124 to lower, thereby pulling the diaphragm 22 to move downwards and pushing the air to compress inward, thereby vibrating and producing sound.

[0067] As can be understood, Figure 1 and Figure 5 As shown, the voice coil 12 is formed by winding enameled wire, with a hollow channel in the middle. The hollow channel of the voice coil 12 extends in the left-right direction, and the magnetically conductive part 211 extends into the corresponding hollow channel of the voice coil 12. In the case where neither of the two voice coils 12 is electrified, the end of the magnetically conductive part 211 should be exposed to the corresponding voice coil 12, so that when the two magnetically conductive parts 211 approach each other, there is still enough magnetically conductive structure in the induced magnetic field formed by the voice coil 12; the end of the magnetically conductive part 211 should also have a certain space with the magnet 11, so as to ensure that the magnetically conductive part 211 has a certain movement space in the left-right direction.

[0068] The hollow passage of the voice coil 12 can be filled with a magnetic fluid 30, which connects the voice coil 12 and the corresponding magnetic guide part 211. The magnetic fluid 30 can be adsorbed between the voice coil 12 and the magnetic guide part 211 due to its own characteristics, thereby playing a flexible supporting role on the magnetic guide part 211, which is conducive to improving the stability of the up and down position of the magnetic guide part 211 and reducing the shaking and deviation of the moving rod 21 when moving. Moreover, the magnetic fluid 30 can also reduce the friction and collision between the moving rod 21 and the voice coil 12 or other components, thereby reducing the generation of noise and improving the sound quality of the loudspeaker 100, making the sound effect more pure and clear.

[0069] In addition, the magnetic fluid 30 itself has magnetism, which can enhance the induced magnetic field generated by the energization of the voice coil 12, thereby facilitating the improvement of the sensitivity of the loudspeaker 100.

[0070] In other embodiments, a support structure can also be provided to support the loudspeaker 100 in the up and down direction, and the magnetic guide part 211 and the support structure are connected in the left and right direction, which is not limited in the present embodiment.

[0071] In some embodiments, the loudspeaker 100 can also include a shell forming an installation cavity with an opening, the magnet 11 and the voice coil 12 are arranged in the installation cavity, and the edge of the diaphragm 22 is connected with the edge of the opening. The shell can protect the internal structure and form the installation basis of the diaphragm 22. The shell can also be part of the electronic device shell, and the loudspeaker 100 is directly assembled based on the electronic device.

[0072] As shown in Figure 1 , Figure 6 and Figure 7 , the shape of the diaphragm 22 and the shape of the opening can be consistent, which is conducive to reducing distortion and scattering of sound during transmission, thereby improving the clarity and fidelity of the sound. For example, the diaphragm 22 can be square, circular, or other regular or irregular patterns.

[0073] The diaphragm 22 has a middle rigid part and an edge folded ring 221 part. The middle rigid part can efficiently transmit energy and reduce unnecessary vibration and distortion to produce clear and accurate sound. The edge folded ring 221 part is a folded ring 221 arranged at the edge of the middle rigid part. The folded ring 221 can provide a flexible transition, so that the diaphragm 22 can better coordinate with the installation structure when vibrating, and the diaphragm 22 can remain stable when vibrating. At the same time, the folded ring 221 has a certain elasticity, which can reduce deformation and damage caused by vibration.

[0074] The deformed part 212 of the dynamic rod 21 can be connected to the center of the diaphragm 22, so that the sound emitted has better uniformity and symmetry, which is beneficial to reduce the distortion and noise of the sound. In actual application, due to design requirements, manufacturing tolerances or installation adjustment factors, there may be a certain deviation between the connection position of the deformed part 212 of the dynamic rod 21 and the diaphragm 22.

[0075] In some embodiments, as shown in Figures 1 to 3 The housing can include a bottom plate 40 having a strip-shaped slot 41 extending in the left-right direction, and the opening direction of the strip-shaped slot 41 is upwardly arranged, and the two magnets 11 and the two voice coils 12 are arranged in the strip-shaped slot 41. The bottom plate 40 provides a mounting basis for the magnets 11 and the voice coils 12, and limits the positions of the magnets 11 and the voice coils 12. The diaphragm 22 is located at the opening side of the strip-shaped slot 41, and the deformed part 212 of the dynamic rod 21 extends from the opening of the strip-shaped slot 41 and is connected to the diaphragm 22.

[0076] As shown in Figure 2 and Figure 5 The bottom plate 40 is in U-shaped 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 oppositely arranged, the lower ends of the two side plates 43 are connected by the base plate 42, and the upper ends of the two side plates 43 form an opening, so that the strip-shaped slot 41 is formed between the base plate 42 and the two side plates 43.

[0077] Please refer to Figure 3 The first voice coil 12a is arranged at the left end of the strip-shaped slot 41, and the second voice coil 12b is arranged at the right end of the strip-shaped slot 41, and the two voice coils 12 can be bonded on the base plate 42 by glue. In order to adapt to the shape of the strip-shaped slot 41, the voice coil 12 can be in a flat structure, thereby increasing the bonding area of the voice coil 12 and the bottom plate 40, and reducing the risk of the magnets 11 and the voice coils 12 moving and falling off.

[0078] The bottom plate 40 can be made of ferromagnetic materials such as iron, cobalt, alloy, etc., or can be made of plastic, which is not limited in the embodiment.

[0079] In the case where the housing is different from the structure of the electronic device shell, the magnets 11, the voice coils 12, the dynamic rod 21, etc. are mounted on the bottom plate 40 to form an integrated structure; it is convenient to process the loudspeaker 100 independently, and the performance and stability test can be performed before the loudspeaker 100 is assembled to the electronic device, and only the loudspeaker 100 needs to be assembled to the electronic device subsequently.

[0080] In the case that the shell is part of an electronic device housing, the installation positions of the magnet 11, the voice coil 12 and the like are determined by forming the strip-shaped groove 41 on the shell, so that the overall structure of the loudspeaker 100 can be more compact and integrated, which helps to reduce the space occupation and improve the aesthetic appearance.

[0081] In some embodiments, the shell can further include an upper plate, and the mounting cavity is formed between the bottom plate 40 and the upper plate.

[0082] The upper plate is arranged at the opening of the bottom plate 40, and the downward projection of the upper plate can cover at least 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-shaped groove 41. In the case that the voice coil 12 is filled with the magnetic fluid 30, the shell can include baffles located at both ends of the strip-shaped groove 41, so that the space surrounded by the baffles, the upper plate, the bottom plate and the magnet 11 can prevent the leakage of the magnetic fluid 30.

[0083] The upper plate has an avoiding opening in communication with the strip-shaped groove 41, and the deformation part 212 can be connected with the diaphragm 22 through the avoiding opening. The shape and size of the avoiding opening 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 to ensure that the first flap 2121 and the second flap 2122 can freely pass through without being hindered.

[0084] In the first example of the above embodiment, the upper plate can be a monolithic structure, and the upper plate as a whole has a ring structure, and the hollow part of the ring structure is the avoiding opening. The upper plate is connected with the top surfaces of the two side plates 43 to form a stable frame, which improves the stability of the entire loudspeaker 100 structure. The upper plate can also be connected with 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 displacement or loosening of the magnet 11 and the voice coil 12 during vibration.

[0085] In the second example of the above embodiment, the upper plate can also be a split structure, i.e. the upper plate includes two plate bodies arranged in the left-right direction, for convenience of description, the two plate bodies are respectively a first plate body and a second plate body, and the avoiding opening is formed between the first plate body and the second plate body. The first plate body is arranged in the strip-shaped groove 41, and the two sides of the first plate body are connected with the two side walls of the strip-shaped groove 41, and the top surface of the first voice coil 12a is connected with the first plate body; the second plate body is arranged in the strip-shaped groove 41, and the two sides of the second plate body are connected with the two side walls of the strip-shaped groove 41, and the top surface of the second voice coil 12b is connected with the second plate body; by fixing the two plate bodies in the strip-shaped groove 41 and closely connecting them with the voice coil 12, the stability of the entire structure is enhanced.

[0086] The integral upper plate in the first example can also be arranged in the strip-shaped groove 41 and connected with the two side walls of the strip-shaped groove 41; the split upper plate in the second example can also be fixed by connecting the upper plate with the top surface of the side plate 43; the embodiment does not limit the structure of the upper plate and the connection relationship between the upper plate and the bottom plate 40. In the case where the upper plate is arranged in the strip-shaped groove 41, the top surface of the upper plate can be flush with or protrude from the top surface of the two side plates 43, and the embodiment does not limit this.

[0087] The upper plate can be made of ferrous metal, cobalt, alloy or other magnetic conductive material, or can be made of plastic, and the embodiment does not limit this.

[0088] In other embodiments, the shell can also not have an upper plate, i.e., the opening of the bottom plate 40 is not shielded. The design without an upper plate further simplifies the overall structure of the loudspeaker 100. Since the upper plate component is removed, the production and assembly process is more convenient.

[0089] The application also provides an electronic device comprising the loudspeaker 100 as described above. Benefiting from the improvements of the loudspeaker 100 in the above embodiments, the electronic device of the second aspect of the application has the same technical effects as the loudspeaker 100 in the above embodiments. Details are not repeated here.

[0090] The electronic device can be various earphone devices such as headphones and OWS earphones, or can be products such as smart glasses, VR devices and AR devices. The electronic device usually has a sound outlet, and the sound film 22 is arranged opposite to the sound outlet. In order to ensure the sound quality, the size of the sound outlet can be larger than the size of the sound film 22. This design can avoid the sound path being blocked or producing diffuse reflection, thereby ensuring the clarity and purity of the sound quality.

[0091] The embodiments of the application are described in detail above in combination with the drawings, but the application is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the application. In addition, the embodiments of the application and the features in the embodiments can be combined with each other without conflict.

Claims

1. A horn, characterized by The loudspeaker comprises: a magnetic circuit system comprising a magnet and two voice coils, the two voice coils being arranged in a first direction, and the magnet being arranged between the two voice coils; a vibration system comprising a moving rod and a diaphragm, the moving rod comprising two magnetic conductive parts and a deformation part connecting the two magnetic conductive parts, the two magnetic conductive parts extending into the two voice coils one by one, and the deformation part being connected with the diaphragm; wherein the two voice coils are used to drive the two magnetic conductive parts to approach or move away from each other to deform the deformation part and drive the diaphragm to vibrate and sound in a second direction; and the first direction is perpendicular to the second direction.

2. The horn of claim 1, wherein The deformation part is a non-ferromagnetic structural member.

3. The horn of claim 2, wherein, The deformation part comprises a first folded plate and a second folded plate arranged at an included angle, a connection between the first folded plate and the second folded plate is connected with the diaphragm, an end of the first folded plate away from the second folded plate is connected with one of the magnetic conductive parts, and an end of the second folded plate away from the first folded plate is connected with the other magnetic conductive part.

4. The horn of claim 3, wherein An end of the first folded plate away from the second folded plate is provided with a connecting folded plate, and a part of the corresponding magnetic conductive part is arranged in a stacking manner along the second direction.

5. The horn of claim 4, wherein, The magnetic conductive part is located on a side of the connecting folded plate facing the diaphragm; or The connecting folded plate has a clamping groove opened in the first direction, and an end of the magnetic conductive part extends into the clamping groove.

6. The horn of claim 3, wherein The included angle between the first folded plate and the second folded plate is 60° to 120°; and / or The first folded plate and the second folded plate are symmetrically arranged.

7. The horn of claim 3, wherein A connection between the first folded plate and the second folded plate forms a connecting protrusion, the connecting protrusion is arc-shaped and protrudes towards the diaphragm, a vertex of the connecting protrusion is connected with the diaphragm, and a thickness of the connecting protrusion is smaller than a thickness of the first folded plate and a thickness of the second folded plate.

8. The horn according to any one of claims 1 to 7, characterized in that The voice coil is filled with a magnetic fluid, and the magnetic fluid connects the voice coil and the corresponding magnetic conductive part.

9. The horn according to any one of claims 1 to 7, wherein The loudspeaker further comprises a bottom plate, the bottom plate has a strip-shaped groove in the first direction, and an opening direction of the strip-shaped groove is arranged in the second direction; The magnet and the two voice coils are arranged in the strip-shaped groove, and the two voice coils are respectively arranged at two ends of the strip-shaped groove.

10. An electronic device, comprising: The electronic device comprises the loudspeaker according to any one of claims 1 to 9.

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