Sound production device

Abstract

The utility model provides a kind of sound production device, it includes basin frame, the vibration system and magnetic circuit system fixed in basin frame;Vibration system includes diaphragm fixed in basin frame, skeleton fixed in diaphragm close to magnetic circuit system side and voice coil fixed in skeleton, diaphragm includes vibration part, fold ring part extended outward by the circumference of vibration part and fixed part extended outward by fold ring part;Magnetic circuit system has magnetic gap, skeleton is fixed in vibration part and extends to magnetic gap, and voice coil is suspended in magnetic gap;The width of voice coil along the first direction perpendicular to the vibration direction of diaphragm is greater than the width of vibration part along the first direction.The utility model discloses sound production device in the case of same size, can make the size of voice coil larger, cannot appear problem of difficult to wind, to improve the acoustic performance of sound production device, in addition, in the case of the same size of voice coil, the size of sound production device can also be reduced, to reserve more space for other devices.

Description

Technical Field

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

[0002] A sound-generating device is a transducer that converts electrical signals into sound signals. It mainly includes a frame, a vibration system fixed to the frame, and a magnetic circuit system that drives the vibration system to vibrate. The vibration system includes a diaphragm and a voice coil that drives the diaphragm to vibrate. The diaphragm includes a vibrating part for vibration.

[0003] In related technologies, the width of the voice coil in the sound-generating device is smaller than the corresponding width of the vibrating part. Therefore, when the sound-generating device is used in a small installation space, such as in a smartwatch or other small electronic device, the width of the voice coil will also shrink accordingly. When the width of the voice coil shrinks to less than 1.8mm, it becomes difficult to wind the voice coil. Alternatively, with a fixed voice coil size, the sound-generating device will occupy more space, which is detrimental to the installation of other components in the small electronic device.

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

[0005] The purpose of this invention is to provide a new sound-generating device to solve the problems in related technologies, such as the difficulty in winding the voice coil when the voice coil of the sound-generating device is reduced to less than 1.8mm, and the problem that the sound-generating device occupies more space in small electronic devices when the voice coil size is fixed.

[0006] This utility model provides a sound-generating device, which includes a frame, a vibration system fixed to the frame, and a magnetic circuit system for driving the vibration system to vibrate. The frame, the vibration system, and the magnetic circuit system together form a sound-generating cavity. The vibration system includes a diaphragm fixed to the frame, a frame fixed to the diaphragm near the magnetic circuit system, and a voice coil fixed to the frame. The diaphragm includes a vibrating part for vibration, a folded ring extending outward from the periphery of the vibrating part, and a fixing part extending outward from the folded ring and fixed to the frame. The magnetic circuit system has a magnetic gap. The frame is fixed to the vibrating part and extends to the magnetic gap, suspending the voice coil within the magnetic gap. The width of the voice coil along a first direction perpendicular to the vibration direction of the diaphragm is greater than the width of the vibrating part along the first direction.

[0007] Preferably, the frame includes a first support portion fixed to the vibrating part and in an annular shape, an extension portion extending obliquely from the periphery of the first support portion toward the magnetic gap, and a second support portion extending from one end of the extension portion away from the first support portion toward the basket and located above the magnetic gap, wherein the voice coil is fixed to the second support portion.

[0008] Preferably, the width of the folded loop portion along the first direction is smaller than the width of the voice coil along the first direction.

[0009] Preferably, the diaphragm further includes a dome fixed to the vibrating part on the side near the magnetic circuit system; the first support part is fixed to the dome on the side near the magnetic circuit system.

[0010] Preferably, the magnetic circuit system includes a magnetic bowl fixed to the basin stand and magnets stacked and fixed to the side of the magnetic bowl near the vibration system; the magnetic bowl includes a bowl bottom and a flange extending from the edge of the bowl bottom towards the side near the vibration system, the side of the flange away from the bowl bottom is fixed to the basin stand; the magnets and the flange are spaced apart to form the magnetic gap.

[0011] Preferably, the bottom of the bowl is provided with a pressure relief hole that extends through it and connects the sound-generating cavity to the outside; the sound-generating device also includes a breathable insulating component fixed to the bottom of the bowl away from the vibration system and covering the pressure relief hole.

[0012] Preferably, the magnet includes a main magnet stacked and fixed to the magnetic bowl, a pole core stacked and fixed to the main magnet on the side away from the bottom of the bowl, and a center magnet stacked and fixed to the pole core on the side away from the main magnet. The center magnet has an inwardly recessed clearance groove corresponding to the position of the extension.

[0013] Preferably, the vibration system further includes an elastic support member; one end of the elastic support member is fixed to the side of the voice coil away from the diaphragm, and the other end of the elastic support member is fixed to the frame.

[0014] Preferably, the elastic support includes two members, which are respectively fixed to opposite ends of the voice coil along the direction perpendicular to the vibration direction; each elastic support includes a first fixed arm fixed to the voice coil, a second fixed arm fixed to the frame, and a spring arm extending from the first fixed arm to the second fixed arm and forming a fixed connection with the second fixed arm.

[0015] Preferably, the second fixing arm of both of the elastic supports extends outside the basin frame and is connected to each other.

[0016] Compared with related technologies, in this invention, the voice coil of the sound-generating device is connected to the vibrating part of the diaphragm through a skeleton, and the width of the voice coil along a first direction perpendicular to the vibration direction of the diaphragm is greater than the width of the vibrating part along the first direction. In this way, when the sound-generating device is of the same size, the voice coil can be larger, and there will be no problem of difficulty in winding it, thereby improving the acoustic performance of the sound-generating device. In addition, when the voice coil size is the same, the space occupied by the sound-generating device can be reduced, so as to reserve more space for other devices. Attached Figure Description

[0017] 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:

[0018] Figure 1 A three-dimensional structural schematic diagram of the sound-generating device provided in an embodiment of this utility model;

[0019] Figure 2 This is a partial exploded view of the structure of the sound-generating device provided in an embodiment of the present utility model;

[0020] Figure 3 For along Figure 1 Cross-sectional view of line AA in the middle;

[0021] Figure 4 This is a schematic diagram of the structure of the sound-generating device after the magnetic bowl is hidden, as provided in an embodiment of this utility model.

[0022] Among them, 100, sound-generating device; 1, frame; 2, vibration system; 21, diaphragm; 211, vibrating part; 212, folded ring part; 213, fixing part; 214, dome; 22, skeleton; 221, first support part; 222, extension part; 223, second support part; 23, voice coil; 24, elastic support; 241, first fixing arm; 242, second fixing arm; 243, spring arm; 3, magnetic circuit system; 31, magnetic cup; 311, cup bottom; 3111, pressure relief hole; 312, flange; 32, magnet; 321, main magnet; 322, pole core; 323, center magnet; 3231, clearance groove; 4, breathable isolation component; 10, sound-generating cavity; 20, magnetic gap. Detailed Implementation

[0023] 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.

[0024] This utility model embodiment provides a sound-generating device 100, combined with... Figures 1 to 4 As shown, it includes a basin frame 1, a vibration system 2 fixed to the basin frame 1, and a magnetic circuit system 3 that drives the vibration system 2 to vibrate. The basin frame 1, the vibration system 2, and the magnetic circuit system 3 together form a sound-generating cavity 10; the magnetic circuit system 3 has a magnetic gap 20.

[0025] The vibration system 2 includes a diaphragm 21 fixed to the frame 1, a frame 22 fixed to the side of the diaphragm 21 near the magnetic circuit system 3, and a voice coil 23 fixed to the side of the frame 22 away from the diaphragm 21. The voice coil 23 drives the diaphragm 21 to vibrate, and the vibration direction of the diaphragm 21 is... Figure 1 The X-axis direction in the diagram.

[0026] The diaphragm 21 includes a vibrating portion 211 for vibration, a folded ring portion 212 extending outward from the periphery of the vibrating portion 211, and a fixing portion 213 extending outward from the folded ring portion 212 and fixed to the frame 1. The width of the folded ring portion 212 in the first direction is smaller than the width of the voice coil 23 in the first direction.

[0027] The frame 22 is fixed to the vibrating part 211 and extends to the magnetic gap 20, suspending the voice coil 23 within the magnetic gap 20; the width of the voice coil 23 along a first direction perpendicular to the vibration direction of the diaphragm 21 is greater than the width of the vibrating part 211 along the first direction, which is... Figure 1 The Y-axis direction in the diagram.

[0028] The diaphragm 21 also includes a dome 214 fixed to the vibrating part 211 on the side near the magnetic circuit system 3; the frame 22 is fixed to the dome 214 on the side near the magnetic circuit system 3, that is, the frame 22 is indirectly fixed to the vibrating part 211 through the dome 214. By adding the dome 214, the acoustic performance of the sound-generating device 100 can be improved, such as improving the response in the mid-to-high frequency range.

[0029] The frame 22 includes a first support portion 221 fixed to the vibrating part 211 and in an annular shape, an extension portion 222 extending obliquely from the periphery of the first support portion 221 toward the magnetic gap 20, and a second support portion 223 extending from one end of the extension portion 222 away from the first support portion 221 toward the frame 1 and located above the magnetic gap 20. At this time, the first support portion 221 is fixed to the side of the dome 214 near the magnetic circuit system 3; the voice coil 23 is fixed to the second support portion 223. This design allows the width of the voice coil 23 in a first direction perpendicular to the vibration direction of the diaphragm 21 to be greater than the width of the vibrating part 211 in the first direction, and can stably support the voice coil 23.

[0030] The vibration system 2 also includes an elastic support 24; one end of the elastic support 24 is fixed to the side of the voice coil 23 away from the diaphragm 21, and the other end of the elastic support is fixed to the frame 1.

[0031] In this embodiment, the elastic support member 24 includes two members, which are respectively fixed to opposite ends of the voice coil 23 along the direction perpendicular to the vibration direction. Each elastic support member 24 includes a first fixed arm 241 fixed to the voice coil 23, a second fixed arm 242 fixed to the frame 1, and a spring arm 243 extending from the first fixed arm 241 to the second fixed arm 242 and forming a fixed connection with the second fixed arm 242. This design can more stably support the voice coil 23.

[0032] The second fixed arms 242 of the two elastic supports 24 both extend outside the frame 1 and are connected to each other. This design allows the voice coil 23 to be easily connected to an external power source.

[0033] The magnetic circuit system 3 includes a magnetic bowl 31 fixed to the basin frame 1 and a magnet 32 ​​stacked and fixed to the magnetic bowl 31 near the vibrating system 2.

[0034] The magnetic bowl 31 includes a bowl bottom 311 and a flange 312 that bends and extends from the edge of the bowl bottom 311 toward the side closer to the vibration system 2. The side of the flange 312 away from the bowl bottom 311 is fixed to the frame 1. The magnet 32 ​​and the flange 312 are spaced apart to form a magnetic gap 20. This simplifies the magnetic circuit system 3 and reduces the width of the sound-generating device 100.

[0035] In this embodiment, the sound-generating device 100 is rectangular; the flange 312 is disposed on the two long axis side edges of the bowl bottom 311.

[0036] The bottom of the bowl 311 is provided with a pressure relief hole 3111 that passes through it and connects the sound-generating inner cavity 10 to the outside. The sound-generating device 100 also includes a breathable isolation component 4 fixed to the side of the bottom of the bowl 311 away from the vibration system 2 and covering the pressure relief hole 3111. In this embodiment, there are two pressure relief holes 3111 and two breathable isolation components 4, which are arranged in a one-to-one correspondence. This design can improve the acoustic performance of the sound-generating device 100, and the breathable isolation component 4 can also achieve a dustproof effect.

[0037] The magnet 32 ​​includes a main magnet 321 stacked and fixed to the magnetic bowl 31, a pole core 322 stacked and fixed to the main magnet 321 on the side away from the bottom 311 of the bowl, and a center magnet 323 stacked and fixed to the pole core 322 on the side away from the main magnet 321. The center magnet 323 has an inwardly recessed clearance groove 3231 corresponding to the position of the extension 222. This design can improve the magnetic effect of the magnetic circuit system 3, thereby further improving the acoustic performance of the sound-generating device 100. The clearance groove 3231 is designed to make way for the frame 22 so that the frame 22 will not collide with the center magnet 323 when it vibrates.

[0038] Compared with related technologies, in this embodiment, the voice coil 23 of the sound-generating device 100 is connected to the vibrating part 211 of the diaphragm 21 through the skeleton 22, and the width of the voice coil 23 along the first direction perpendicular to the vibration direction of the diaphragm 21 is greater than the width of the vibrating part 211 along the first direction. In this way, when the sound-generating device 100 is of the same size, the size of the voice coil 23 can be larger, and there will be no problem of difficulty in winding, thereby improving the acoustic performance of the sound-generating device 100. In addition, when the size of the voice coil 23 is the same, the size of the diaphragm 21 can be reduced, thereby reducing the size of the sound-generating device 100, that is, reducing the space occupied by the sound-generating device 100, so as to reserve more space for other devices.

[0039] The above are merely embodiments 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, comprising a frame, a vibration system fixed to the frame, and a magnetic circuit system for driving the vibration system to vibrate, wherein the frame, the vibration system, and the magnetic circuit system together enclose a sound-generating cavity; the vibration system comprises a diaphragm fixed to the frame, a frame fixed to the diaphragm near the magnetic circuit system, and a voice coil fixed to the frame; the diaphragm comprises a vibrating portion for vibration, a folded ring portion extending outward from the periphery of the vibrating portion, and a fixing portion extending outward from the folded ring portion and fixed to the frame; the magnetic circuit system has a magnetic gap, characterized in that... The frame is fixed to the vibrating part and extends to the magnetic gap, and the voice coil is suspended in the magnetic gap; the width of the voice coil along a first direction perpendicular to the vibration direction of the diaphragm is greater than the width of the vibrating part along the first direction.

2. The sound-generating device as described in claim 1, characterized in that, The frame includes a first support portion fixed to the vibrating part and in the shape of a ring, an extension portion extending obliquely from the periphery of the first support portion toward the magnetic gap, and a second support portion extending from one end of the extension portion away from the first support portion toward the frame and located above the magnetic gap; the voice coil is fixed to the second support portion.

3. The sound-generating device as described in claim 2, characterized in that, The width of the surround portion along the first direction is smaller than the width of the voice coil along the first direction.

4. The sound-generating device as described in claim 2, characterized in that, The diaphragm also includes a dome fixed to the vibrating part on the side near the magnetic circuit system; the first support part is fixed to the dome on the side near the magnetic circuit system.

5. The sound-generating device as described in claim 2, characterized in that, The magnetic circuit system includes a magnetic bowl fixed to the basin stand and magnets stacked and fixed to the side of the magnetic bowl near the vibration system; the magnetic bowl includes a bowl bottom and a flange extending from the edge of the bowl bottom towards the side near the vibration system, the side of the flange away from the bowl bottom is fixed to the basin stand; the magnets and the flange are spaced apart to form the magnetic gap.

6. The sound-generating device as described in claim 5, characterized in that, The bottom of the bowl is provided with a pressure relief hole that runs through it and connects the sound-generating cavity to the outside; the sound-generating device also includes a breathable isolation component fixed to the bottom of the bowl away from the vibration system and covering the pressure relief hole.

7. The sound-generating device as described in claim 5, characterized in that, The magnet includes a main magnet stacked and fixed to the magnetic bowl, an pole core stacked and fixed to the main magnet on the side away from the bottom of the bowl, and a center magnet stacked and fixed to the pole core on the side away from the main magnet. The center magnet has an inwardly recessed clearance groove corresponding to the position of the extension.

8. The sound-generating device as described in claim 1, characterized in that, The vibration system also includes an elastic support member; one end of the elastic support member is fixed to the side of the voice coil away from the diaphragm, and the other end of the elastic support member is fixed to the frame.

9. The sound-generating device as described in claim 8, characterized in that, The elastic support includes two members, which are respectively fixed to opposite ends of the voice coil along the direction perpendicular to the vibration direction. Each elastic support includes a first fixed arm fixed to the voice coil, a second fixed arm fixed to the frame, and a spring arm extending from the first fixed arm to the second fixed arm and forming a fixed connection with the second fixed arm.

10. The sound-generating device as described in claim 9, characterized in that, The second fixing arm of each of the two elastic supports extends out of the basin frame and is connected to each other.

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