Sounding device

Abstract

The utility model provides a sound production device. The sound production device comprises a basin stand; a vibration system and a magnetic circuit system; the magnetic circuit system comprises a lower clamping plate, main magnetic steel and a magnetic piece which are stacked and fixed on one side, close to the vibration system, of the lower clamping plate and are of an annular structure, and auxiliary magnetic steel which is stacked and fixed on the lower clamping plate and surrounds the main magnetic steel; the main magnetic steel is arranged around the peripheral side of the magnetic piece, the main magnetic steel and the magnetic piece are mutually spaced to form an installation gap, the peripheral side of the main magnetic steel and the auxiliary magnetic steel are mutually spaced to form a magnetic gap, and the voice coil is inserted in the magnetic gap. Compared with the prior art, the sounding device provided by the utility model can reduce the magnetic flux leakage at the center of a product and has good acoustic performance.

Description

[Technical Field]

[0001] This utility model relates to the field of electroacoustic conversion technology, and in particular to a sound-generating device. [Background Technology]

[0002] A sound-generating device is a transducer that converts electrical signals into sound signals. The sound-generating device mainly includes a frame, a clamp fixed to the frame, a vibration system fixed to the frame for emitting sound, and a magnetic circuit system for driving the vibration system. The magnetic circuit system is fixed to the clamp.

[0003] In related sound-generating devices, the vibration system includes a diaphragm fixed to the frame and a voice coil that drives the diaphragm to vibrate and generate sound; the magnetic circuit system includes a main magnet fixed to a clamping plate and a secondary magnet surrounding the main magnet, with the main magnet and the secondary magnet spaced apart to form a magnetic gap, and the voice coil inserted into the magnetic gap; the magnetic circuit system and the voice coil are energized to drive the diaphragm to vibrate and generate sound along the vibration direction of the vibration system. However, in this sound-generating device, the main magnet and the secondary magnet are magnetized in opposite directions, and the single main magnet configuration makes the sound-generating device prone to magnetic leakage, resulting in poor acoustic performance.

[0004] Therefore, it is necessary to provide a new sound-generating device to solve the above problems. [Utility Model Content]

[0005] The technical problem to be solved by this invention is to provide a sound-generating device that can reduce magnetic leakage and has good acoustic performance.

[0006] To solve the above-mentioned technical problems, this utility model provides a sound-generating device, the sound-generating device comprising:

[0007] Sink stand;

[0008] A vibration system comprising a diaphragm fixed to the frame and a voice coil suspended below the diaphragm; and,

[0009] A magnetic circuit system, which is fixed to the frame and drives the diaphragm to vibrate and produce sound;

[0010] The magnetic circuit system includes a lower clamping plate, a main magnet and a magnetic component in a ring structure stacked and fixed to the lower clamping plate on the side near the vibration system, and an auxiliary magnet stacked and fixed to the lower clamping plate and surrounding the main magnet; the main magnet is arranged around the outer periphery of the magnetic component, and the main magnet and the magnetic component are spaced apart to form an installation gap, and the outer periphery of the main magnet and the auxiliary magnet are spaced apart to form a magnetic gap, and the voice coil is inserted into the magnetic gap.

[0011] Preferably, the magnetic component is made of magnetic steel or magnetically conductive material.

[0012] Preferably, the magnetization direction of the main magnet is opposite to the magnetization direction of the magnet material and the magnetization direction of the auxiliary magnet.

[0013] Preferably, the magnetization direction of the main magnet is along the vibration direction of the vibration system towards the vibration system, while the magnetization direction of the magnet material and the magnetization direction of the auxiliary magnet are both along the vibration direction of the vibration system away from the vibration system.

[0014] Preferably, the magnetic circuit system further includes a main pole core, which is stacked and fixed on the side of the main magnet near the vibration system.

[0015] Preferably, the main pole core is a rectangular plate structure, and the main pole core is stacked and fixed on the side of the main magnet and the magnetic component near the vibration system.

[0016] Preferably, the main pole core includes a main pole core body stacked and fixed on the side of the main magnet near the vibration system, a stepped portion formed by the side of the main pole core body near the vibration system recessed inward therefrom, and a through groove penetrating the stepped portion; the magnetic element faces the through groove and partially extends into the through groove, and the through groove communicates with the mounting gap.

[0017] Preferably, the surface of the stepped portion near the vibration system is flush with the surface of the magnetic component near the vibration system.

[0018] Preferably, the installation gap between the main magnet and the magnetic component is defined as d, which satisfies the following condition: 0mm≤d≤5mm.

[0019] Preferably, the sound-generating device further includes a secondary pole core, which is stacked and fixed on the side of the secondary magnet near the vibration system, and the side of the secondary pole core near the vibration system is fixed to the frame.

[0020] Preferably, the diaphragm includes an annular folded ring, a fixing portion extending outward from the outer periphery of the folded ring, a vibrating portion extending inward from the inner periphery of the folded ring, and a dome fixed to the vibrating portion on the side near the magnetic circuit system; the fixing portion is fixed to the side of the frame away from the magnetic circuit system, and the voice coil is fixed to the dome on the side near the magnetic circuit system.

[0021] Compared with related technologies, the sound-generating device of this utility model has a vibration system and a magnetic circuit system installed on both sides of the frame. The vibration system includes a diaphragm fixed to the frame and a voice coil suspended below the diaphragm. The magnetic circuit system is fixed to the frame and drives the diaphragm to vibrate and generate sound. The magnetic circuit system is fixed to the side of the frame away from the vibration system. The magnetic circuit system includes a lower clamping plate, a main magnet and a magnetic component in a ring structure stacked and fixed to the lower clamping plate near the vibration system, and a secondary magnet stacked and fixed to the lower clamping plate and surrounding the main magnet. The main magnet is arranged around the outer periphery of the magnetic component, and the main magnet and the magnetic component are spaced apart to form an installation gap. The outer periphery of the main magnet and the secondary magnet are spaced apart to form a magnetic gap, and the voice coil is inserted into the magnetic gap. The magnetic component and the main magnet form a closed loop of the magnetic field of the main magnet, which effectively reduces magnetic leakage in the vibration direction of the vibration system and improves the acoustic performance of the sound-generating device. [Attached Image Description]

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0023] Figure 1 A three-dimensional structural schematic diagram of the sound-generating device provided in an embodiment of this utility model;

[0024] Figure 2 An exploded view of the sound-generating device provided in an embodiment of this utility model;

[0025] Figure 3 For along Figure 1 Sectional view of line AA in the middle;

[0026] Figure 4 For along Figure 1 Sectional view of the middle BB line;

[0027] Figure 5 for Figure 3 A magnified view of part C;

[0028] Figure 6 This is a schematic diagram of the dome structure of the sound-generating device provided in an embodiment of the present invention.

[0029] Figure 7 This is a schematic diagram of the internal structure of the sound-generating device provided in an embodiment of the present invention.

[0030] In the diagram, 100 is the sound-generating device, 1 is the frame, 2 is the vibration system, 21 is the diaphragm, 211 is the fixing part, 212 is the folded ring, 213 is the vibrating part, 2131 is the vibrating part body, 2132 is the first connecting plate, 2133 is the second connecting plate, 3234 is the arc-shaped inclined part, 2135 is the limiting groove, 214 is the dome, 2141 is the dome body, 2142 is the groove, and 2143 is the first 2144. Bending part, 2145. First connecting part, 2146. Second bending part, 2147. Second connecting part, 22. Voice coil, 3. Magnetic circuit system, 31. Main magnet, 32. Secondary magnet, 33. Lower clamping plate, 34. Mounting gap, 35. Magnetic gap, 36. Magnetic component, 4. Main pole core, 41. Main pole core body, 42. Through slot, 43. Stepped part, 5. Secondary pole core, 6. Circuit board, 7. Support part.

Detailed Implementation Methods

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0032] Please see Figures 1-7 As shown, this utility model embodiment provides a sound generating device 100, which includes a basin frame 1 and a vibration system 2 and a magnetic circuit system 3 respectively fixed on opposite sides of the basin frame 1.

[0033] The frame 1 is used to support and fix the vibration system 2 and the magnetic circuit system 3.

[0034] The vibration system 2 includes a diaphragm 21 fixed to the frame 1 and a voice coil 22 suspended below the diaphragm 21. The voice coil 22 is used to drive the diaphragm 21 to vibrate and produce sound.

[0035] The magnetic circuit system 3 includes a lower clamping plate 33, a main magnet 31 and a magnetic element 32 in a ring structure stacked and fixed to the lower clamping plate 33 near the vibrating system 2, and a secondary magnet 32 ​​stacked and fixed to the lower clamping plate 33 and surrounding the main magnet 31. The main magnet 31 is arranged around the outer periphery of the magnetic element 36, and the main magnet 31 and the magnetic element 36 are spaced apart to form an installation gap 34. The outer periphery of the main magnet 31 and the secondary magnet 32 ​​are spaced apart to form a magnetic gap 35, and the voice coil 22 is inserted into the magnetic gap 35. The main magnet 31 and the secondary magnet 32 ​​generate a magnetic field to drive the voice coil 22 to vibrate and produce sound. Optionally, the main magnet 31 can also be made of a magnetically conductive material, generating a magnetic field similar to that of a magnet.

[0036] Optionally, the main magnet 31 can also be multiple individual magnets arranged in a ring to form a ring around the magnetic element 36.

[0037] In this embodiment, the magnetic component 32 is made of magnetic steel or magnetically conductive material.

[0038] In this embodiment, the magnetization direction of the main magnet 31 is opposite to the magnetization direction of the magnetic component 36 and the magnetization direction of the auxiliary magnet 32, respectively. By forming a closed loop between the magnetic component 36 and the main magnet 31, the magnetic field of the main magnet 31 is effectively reduced, thus reducing magnetic leakage in the vibration direction of the vibration system 2 and improving the acoustic performance of the sound-generating device 100.

[0039] In this embodiment, the magnetization direction of the main magnet 31 is along the vibration direction of the vibration system 2 towards the vibration system 2, while the magnetization directions of the magnetic component 36 and the auxiliary magnet 32 ​​are both along the vibration direction of the vibration system 2 and away from the vibration system 2. By forming a closed loop between the magnetic component 36 and the main magnet 31, the magnetic field of the main magnet 31 is effectively reduced in the vibration direction of the vibration system 2, thereby improving the acoustic performance of the sound-generating device 100.

[0040] Specifically, such as Figure 3 As shown, the magnetic pole of the main magnet 31 on the side closest to the vibration system is the N pole, and the magnetic pole on the side furthest from the vibration system is the S pole. The magnetic components 36 and 32 both have S poles on the side closest to the vibration system, and N poles on the side furthest from the vibration system. By forming a closed loop between the magnetic component 36 and the main magnet 31, the magnetic field of the main magnet 31 is effectively reduced, thus minimizing magnetic leakage in the vibration direction of the vibration system 2 and improving the acoustic performance of the sound-generating device 100.

[0041] In this embodiment, the auxiliary magnet 32 ​​includes two magnets disposed opposite to the long axis of the basin frame 1 and two magnets disposed opposite to the short axis of the basin frame 1. The four magnets are spaced apart from the main magnet 31 to form magnetic gaps 35.

[0042] In this embodiment, the magnetic circuit system 3 further includes a main pole core 4, which is stacked and fixed on the side of the main magnet 31 near the vibration system 2. The main pole core 4 is stacked on the main magnet 31 to enhance the magnetic field performance of the main magnet 31.

[0043] This implementation method, such as Figure 7As shown, the main pole core 4 is a rectangular plate structure, and the main pole core 4 is stacked and fixed on the side of the main magnet 31 and the magnetic component 36 near the vibration system 2. By stacking the main pole core 4 as a whole on the main magnet 31 and the magnetic component 36, the overall magnetic field performance of the main magnet 31 and the magnetic component 36 is increased.

[0044] In one optional embodiment of this utility model, please refer to Figures 2-3 As shown, the main pole core 4 includes a main pole core body 41 stacked and fixed to the side of the main magnet 31 near the vibration system 2, a stepped portion 43 formed by the recess of the main pole core body 41 from the side near the vibration system 2, and a through groove 42 penetrating the stepped portion 43; the magnetic component 36 faces the through groove 42 and partially extends into the through groove 42, and the through groove 42 communicates with the mounting gap 34. By connecting the main pole core 4 and the mounting gap 34 of the main magnet 31 to achieve an overall open-hole setting, the magnetic component 36 and the main magnet 31 form a closed loop of the magnetic field of the main magnet 31, reducing magnetic leakage at the center of the product without affecting the acoustic performance of the magnetic field at the voice coil 22.

[0045] In this embodiment, the surface of the stepped portion 43 near the vibration system 2 is flush with the surface of the magnetic component near the vibration system 2. This reduces the height of the magnetic circuit system 3 and saves installation space.

[0046] In this embodiment, the installation gap between the main magnet 31 and the magnetic component 36 is defined as d, which satisfies the following condition: 0mm ≤ d ≤ 5mm. A small gap between the main magnet 31 and the magnetic component 36 facilitates reducing the installation space required.

[0047] In this embodiment, the sound-generating device 100 further includes a secondary pole core 5, which is stacked and fixed on the side of the secondary magnet 32 ​​near the vibration system 2, and the side of the secondary pole core 5 near the vibration system 2 is fixed to the frame 1. This facilitates enhancing the magnetic permeability of the secondary magnet 32 ​​and increasing the overall magnetic field strength of the secondary magnet 32.

[0048] In this embodiment, the diaphragm 21 includes an annular folded ring 212, a fixing portion 211 extending outward from the outer periphery of the folded ring 212, a vibrating portion 213 extending inward from the inner periphery of the folded ring 212, and a dome 214 fixed to the vibrating portion 213 on the side near the magnetic circuit system 3; the fixing portion 211 is fixed to the side of the frame 1 away from the magnetic circuit system 3, and the voice coil 22 is fixed to the side of the dome 214 near the magnetic circuit system 3.

[0049] In this embodiment, the dome 214 includes an annular dome body 2141, a plurality of grooves 2142 formed by recessing the dome body 2141 from the side away from the magnetic circuit system 3 toward the magnetic circuit system 3, a first bent portion 2143 formed by bending and extending the outer periphery of the dome body 2141 toward the side near the magnetic circuit system 3, a first connecting portion 2144 formed by extending the outer periphery of the first bent portion 2143 toward the side away from the dome body 2141, a second bent portion 2145 formed by bending and extending the outer periphery of the connecting portion toward the side near the magnetic circuit system 3, and a second connecting portion 2146 formed by extending the outer periphery of the second bent portion 2145 toward the side near the frame 1; the side of the second connecting portion 2146 away from the dome body 2141 is fixed to the vibrating portion 213; the voice coil 22 is fixed to the side of the first bent portion 2143 near the magnetic circuit system 3.

[0050] In this embodiment, the plurality of grooves 2142 are evenly arranged along the long axis of the basin frame 1. The grooves 2142 are annular in shape, and specifically, four are arranged side by side.

[0051] In this embodiment, the vibrating part 213 includes a vibrating part body 2131 fixed to the inner periphery of the folded ring 212, a first connecting plate 2132 and a second connecting plate 2133 extending from the vibrating part body 2131 toward the dome 214, and an arc-shaped inclined part 2134 extending from the first connecting plate 2132 toward the dome 214. A limiting groove 2135 is formed between the first connecting plate 2132 and the second connecting plate 2133 at intervals. The second connecting part 2146 is disposed within the limiting groove 2135, and the second bent part 2145 abuts against the arc-shaped inclined part 2134. By completely disposing of the second bent part 2145 within the limiting groove 2135, the surface of the second connecting part 2146 away from the magnetic circuit system 3 is aligned with the surface of the first connecting plate 2132 away from the magnetic circuit system 3, reducing the overall height of the diaphragm 21 and saving installation space.

[0052] In this embodiment, the sound-generating device 100 further includes a circuit board 6, which is fixed to the side of the frame 1 away from the vibration system 2. The end of the circuit board 6 away from the frame 1 is electrically connected to the voice coil 22. The circuit board 6 can be an FPC board for conductive connection. Two circuit boards 6 are included, respectively disposed at opposite ends of the voice coil 22, which can increase the vibration intensity of the diaphragm 21 to improve sound loudness and sensitivity; prevent lateral oscillation of the voice coil 22 during vibration, and improve reliability.

[0053] In this embodiment, the sound-generating device 100 further includes multiple support portions 7, which are respectively fixed to the four corners of the lower clamping plate 33 near the vibration system 2. The support portions 7 are fixed to the circuit board 6 near the vibration system 2, further improving the fixing effect of the circuit board 6.

[0054] Compared with related technologies, the sound-generating device of this utility model has a vibration system and a magnetic circuit system installed on both sides of the frame. The vibration system includes a diaphragm fixed to the frame and a voice coil suspended below the diaphragm. The magnetic circuit system is fixed to the frame and drives the diaphragm to vibrate and generate sound. The magnetic circuit system is fixed to the side of the frame away from the vibration system. The magnetic circuit system includes a lower clamping plate, a main magnet and a magnetic component in a ring structure stacked and fixed to the lower clamping plate near the vibration system, and a secondary magnet stacked and fixed to the lower clamping plate and surrounding the main magnet. The main magnet is arranged around the outer periphery of the magnetic component, and the main magnet and the magnetic component are spaced apart to form an installation gap. The outer periphery of the main magnet and the secondary magnet are spaced apart to form a magnetic gap, and the voice coil is inserted into the magnetic gap. The magnetic component and the main magnet form a closed loop of the magnetic field of the main magnet, which effectively reduces magnetic leakage in the vibration direction of the vibration system and improves the acoustic performance of the sound-generating device.

[0055] The above description is merely an embodiment of this utility model. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this utility model, but these improvements all fall within the protection scope of this utility model.

Claims

1. A sound-generating device, the sound-generating device comprising: Sink stand; A vibration system, the vibration system comprising a diaphragm fixed to the frame and a voice coil suspended below the diaphragm; as well as, A magnetic circuit system, fixed to the frame and driving the diaphragm to vibrate and produce sound; characterized in that... The magnetic circuit system includes a lower clamping plate, a main magnet and a magnetic component in a ring structure stacked and fixed to the lower clamping plate on the side near the vibration system, and an auxiliary magnet stacked and fixed to the lower clamping plate and surrounding the main magnet; the main magnet is arranged around the outer periphery of the magnetic component, and the main magnet and the magnetic component are spaced apart to form an installation gap, and the outer periphery of the main magnet and the auxiliary magnet are spaced apart to form a magnetic gap, and the voice coil is inserted into the magnetic gap.

2. The sound-generating device according to claim 1, characterized in that, The magnetic component is made of magnetic steel or magnetically conductive material.

3. The sound-generating device according to claim 2, characterized in that, The magnetization direction of the main magnet is opposite to the magnetization direction of the magnet material and the magnetization direction of the auxiliary magnet.

4. The sound-generating device according to claim 3, characterized in that, The magnetization direction of the main magnet is along the vibration direction of the vibration system towards the vibration system, while the magnetization direction of the magnet material and the magnetization direction of the auxiliary magnet are both along the vibration direction of the vibration system away from the vibration system.

5. The sound-generating device according to claim 1, characterized in that, The magnetic circuit system also includes a main pole core, which is stacked and fixed on the side of the main magnet near the vibration system.

6. The sound-generating device according to claim 5, characterized in that, The main pole core is a rectangular plate structure, and the main pole core is stacked and fixed on the side of the main magnet and the magnetic component near the vibration system.

7. The sound-generating device according to claim 5, characterized in that, The main pole core includes a main pole core body stacked and fixed on the side of the main magnet near the vibration system, a stepped portion formed by the side of the main pole core body near the vibration system recessed inward therefrom, and a through groove penetrating the stepped portion; the magnetic component is directly opposite the through groove and partially extends into the through groove, and the through groove is in communication with the mounting gap.

8. The sound-generating device according to claim 7, characterized in that, The surface of the stepped portion near the vibration system is flush with the surface of the magnetic component near the vibration system.

9. The sound-generating device according to claim 1, characterized in that, The installation gap between the main magnet and the magnetic component is defined as d, and satisfies the following condition: 0mm≤d≤5mm.

10. The sound-generating device according to claim 1, characterized in that, The sound-generating device also includes a secondary pole core, which is stacked and fixed on the side of the secondary magnet near the vibration system, and the side of the secondary pole core near the vibration system is fixed to the frame.

11. The sound-generating device according to claim 1, characterized in that, The diaphragm includes an annular folded ring, a fixing portion extending outward from the outer periphery of the folded ring, a vibrating portion extending inward from the inner periphery of the folded ring, and a dome fixed to the vibrating portion on the side near the magnetic circuit system; the fixing portion is fixed to the side of the frame away from the magnetic circuit system, and the voice coil is fixed to the dome on the side near the magnetic circuit system.

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