Sound production unit

Abstract

The utility model discloses a sounding unit, which comprises a vibration assembly, a basin stand, and a magnetic circuit assembly and a shaping support chip which are arranged on the basin stand, the vibration assembly comprises a voice coil, the magnetic circuit assembly comprises a central magnetic steel and a plurality of side magnetic steels, the central magnetic steel is located in an area surrounded by the voice coil, and the plurality of side magnetic steels are wound on the periphery of the voice coil; the multiple pieces of edge magnetic steel comprise two pieces of first edge magnetic steel and two pieces of second edge magnetic steel, a gap is formed between the adjacent edges of the two pieces of second edge magnetic steel, the gap and the adjacent edges of the two pieces of second edge magnetic steel define a containing area, the two pieces of first edge magnetic steel are arranged in the containing area, and the two pieces of second edge magnetic steel are arranged in the containing area. First gaps are formed between the two ends of the first side magnetic steel and the adjacent second side magnetic steel; the shaping support chip is provided with a connecting arm, one part of the connecting arm is bonded with the bottom of the voice coil, and the other part extends outwards from the first gap. The side magnetic steel is of a surrounding voice coil structure, the whole voice coil is almost completely surrounded by a magnetic circuit, and the performance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electroacoustic converters, in particular to a sound generating unit. Background Art

[0002] With the continuous development of consumer electronic products such as mobile phones and tablets, as well as large wearable electronic devices such as AR / VR, these products have put forward higher standards in terms of lightweight appearance and performance optimization. Among them, the sound unit, as an important component of such products, can convert electrical energy into sound energy. It plays a vital role in the sound amplifier system, so its performance optimization and size reduction become particularly important. However, in order to pursue high performance and large amplitude, existing sound units usually have fixed support plates in the sound unit. In order to avoid the fixed support plate structure, the side magnets in the sound unit cannot be made into a fully surrounded voice coil, resulting in a significant loss in voice coil performance. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a sound unit to solve the problem that the existing sound unit has a significant loss in voice coil performance because the side magnetic steel cannot be made into a surround voice coil structure due to the need to avoid the fixed support plate structure.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] A sound-emitting unit comprises: a vibration component, a basin frame, and a magnetic circuit component and a shaped support plate arranged on the basin frame, wherein the vibration component comprises a voice coil, the magnetic circuit component comprises a central magnetic steel and a plurality of side magnetic steels, the central magnetic steel is located in an area surrounded by the voice coil, and the plurality of side magnetic steels are arranged around the periphery of the voice coil; the plurality of side magnetic steels comprise two first side magnetic steels arranged in parallel along a first direction and two second side magnetic steels arranged in parallel along a second direction, wherein there is a spacing between the mutually adjacent sides of the two second side magnetic steels, and the spacing and the mutually adjacent sides of the two second side magnetic steels together form a receiving area, the two first side magnetic steels are arranged in the receiving area, and first gaps are respectively arranged between the two ends of the first side magnetic steel and the adjacent second side magnetic steels; the shaped support plate is provided with a connecting arm, a part of the connecting arm is bonded to the bottom of the voice coil, and the other part extends outward from the first gap to extend out of the area surrounded by the plurality of side magnetic steels.

[0006] Furthermore, in the sound-emitting unit described in the utility model, the shaping support piece includes two brackets, and the connecting arm is arranged on the brackets.

[0007] Furthermore, in the sound-emitting unit described in the present invention, the central magnetic steel is provided with a first hollow portion recessed inwardly on a first side extending along the first direction, and the first hollow portion is located in the middle of the first side.

[0008] Furthermore, in the sound-emitting unit described in the present invention, a first soldering pad is provided on the bracket, and a position of the first soldering pad corresponds to a position of the first hollow portion.

[0009] Furthermore, in the sound-emitting unit described in the utility model, a voice coil lead is provided on the voice coil, and the voice coil lead is connected to the first soldering pad.

[0010] Furthermore, in the sound-emitting unit described in the present invention, the central magnetic steel is provided with a second hollow portion recessed inwardly at a corner.

[0011] Furthermore, in the sound-emitting unit described in the utility model, a second soldering pad is provided on the bracket, and the position of the second soldering pad corresponds to the position of the second hollow portion.

[0012] Furthermore, in the sound-emitting unit described in the utility model, an external connection portion connected to the connecting arm is provided on the bracket, and the external connection portion is bonded to the bottom of the basin frame.

[0013] Furthermore, in the sound-generating unit described in the utility model, the vibration component includes a diaphragm, and the diaphragm is arranged above the basin frame.

[0014] Furthermore, in the sound-emitting unit described in the present invention, the first side magnetic steel is located in the area surrounded by the connecting arm.

[0015] The beneficial effect of the utility model is that the utility model arranges the first side magnetic steel and the second side magnetic steel on the periphery of the voice coil, and arranges the first side magnetic steel in the accommodation area formed by the two first side magnetic steels. Excluding the first gaps at both ends of the first side magnetic steel for avoiding the connecting arm of the shaping support, the entire voice coil is completely surrounded by the magnetic circuit, and the first gap is a narrow channel with a small avoidance space, so that the side magnetic steel can be a surround voice coil structure, and the entire voice coil is almost completely surrounded by the magnetic circuit, and the performance is improved. That is to say, in the utility model, the narrow first gaps at both ends of the side magnetic steel are removed, and the voice coil is completely surrounded by the side magnetic steel (that is, the voice coil is completely surrounded by the magnetic circuit), and the design that the voice coil is almost completely surrounded by the magnetic circuit can provide a uniform and strong magnetic field environment for the voice coil, and effectively suppress the interference of the external magnetic field on the sound unit, etc., so that the sound unit has higher clarity, accuracy and audio quality when outputting audio, thereby effectively improving the performance of the sound unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is a structural schematic diagram of the sound-emitting unit of the utility model in one embodiment at one viewing angle;

[0017] Figure 2 It is a structural schematic diagram of the sound-emitting unit of the utility model in another viewing angle under one implementation mode;

[0018] Figure 3 It is a structural explosion diagram of the sound-emitting unit of the utility model in another perspective under one implementation mode;

[0019] Figure 4 for Figure 1 The schematic diagram of the structure of the sound unit shown after some components are hidden;

[0020] Figure 5 for Figure 4 The top view of the sound unit shown with some components hidden;

[0021] Figure 6 It is a structural schematic diagram of a shaped support piece of the sound-emitting unit of the utility model in one embodiment;

[0022] Figure 7 It is a structural schematic diagram of the sound-emitting unit of the utility model after some components are hidden in another implementation manner;

[0023] Figure 8 for Figure 7 The top view of the sound unit shown with some components hidden;

[0024] Fig. 9 It is a schematic structural diagram of a shaping support piece of the sound-emitting unit described in the utility model in another embodiment.

[0025] Description of labels:

[0026] 1. Basin stand;

[0027] 2. Shaped support sheet; 21. Bracket; 211. First pad; 212. Second pad; 213. Connecting arm; 214. External connection part;

[0028] 3. Voice coil; 31. Voice coil lead;

[0029] 4. Central magnetic steel; 41. First hollow portion; 42. Second hollow portion;

[0030] 51. first side magnetic steel; 52. second side magnetic steel;

[0031] 6. Diaphragm;

[0032] 7. Yoke iron. DETAILED DESCRIPTION

[0033] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0034] As a common electroacoustic transducer device that converts electrical energy into sound energy, the sound unit plays an indispensable role in the sound amplifier system. With the technological development of consumer electronic products such as mobile phones and tablets, especially large wearable electronic devices such as AR / VR, various electronic products have put forward higher requirements in terms of product lightness and performance. As an important component of such products, the consumer market has also put forward higher and higher requirements in terms of performance and size. In order to pursue high performance and large amplitude, existing sound units usually have fixed support plates in the sound unit. In order to avoid the fixed support plate structure, the side magnets in the sound unit cannot be made into a fully surrounded voice coil, resulting in a large loss in voice coil performance. Because of the need to avoid the fixed support plate structure, the side magnets cannot be made into a surround voice coil structure, resulting in a large loss in the performance of the voice coil R corner position.

[0035] To do this, please refer to Figures 1 to 9 As shown, the utility model provides a sound unit, which includes: a vibration component, a basin frame 1, and a magnetic circuit component and a fixed support piece 2 arranged on the basin frame 1, the vibration component includes a voice coil 3, the magnetic circuit component includes a central magnetic steel 4 and a plurality of side magnetic steels, the central magnetic steel 4 is located in the area surrounded by the voice coil 3, and the plurality of side magnetic steels are wound around the periphery of the voice coil 3; the plurality of side magnetic steels include two first side magnetic steels 51 arranged in parallel along a first direction and two second side magnetic steels 52 arranged in parallel along a second direction, wherein the two There is a spacing between the adjacent sides of the second side magnetic steels 52, and the spacing and the adjacent sides of the two second side magnetic steels 52 together form an accommodating area. The two first side magnetic steels 51 are arranged in the accommodating area, and a first gap is respectively provided between the two ends of the first side magnetic steel 51 and the adjacent second side magnetic steels 52; the shaping support plate 2 is provided with a connecting arm 213, a part of the connecting arm 213 is bonded to the bottom of the voice coil 3, and the other part extends outward from the first gap to extend out of the area surrounded by multiple side magnetic steels.

[0036] From the above description, it can be seen that the beneficial effect of the utility model is that: the utility model arranges the first side magnetic steel 51 and the second side magnetic steel 52 on the periphery of the voice coil 3, and arranges the first side magnetic steel 51 in the accommodation area formed by the two first side magnetic steels 51 (such as Figure 4As shown). Excluding the first gaps at both ends of the first side magnetic steel 51 for avoiding the connecting arm 213 of the shaping support plate 2, the entire voice coil 3 is completely surrounded by the magnetic circuit, and the first gap is a narrow channel with a small avoidance space, so that the side magnetic steel can be a surround voice coil 3 structure, and the entire voice coil 3 is almost completely surrounded by the magnetic circuit, and the performance is improved. That is to say, in the present utility model, the narrow first gaps at both ends of the side magnetic steel are removed, and the voice coil 3 is completely surrounded by the side magnetic steel 5 (that is, the voice coil 3 is completely surrounded by the magnetic circuit), and the design that the voice coil 3 is almost completely surrounded by the magnetic circuit can provide a uniform and strong magnetic field environment for the voice coil 3, and effectively suppress the interference of the external magnetic field on the sound unit, etc., so that the sound unit has higher clarity, accuracy and audio quality when outputting audio, thereby effectively improving the performance of the sound unit.

[0037] Furthermore, in the sound-emitting unit of the present invention, the shaping support piece 2 includes two brackets 21 , and the connecting arm 213 is arranged on the brackets 21 .

[0038] In the above technical solution of the utility model, two brackets 21 are provided, and a connecting arm 213 is provided on each bracket 21. The two brackets 21 are provided as the shaping support piece 2 so as to obtain a high-performance large-amplitude sound-emitting unit.

[0039] Furthermore, in the sound-emitting unit described in the present invention, the central magnetic steel 4 is provided with a first hollow portion 41 recessed inwardly on a first side extending along the first direction, and the first hollow portion 41 is located in the middle of the first side.

[0040] In the above technical solution of the present invention, a first hollow portion 41 recessed inwardly is provided on a first side edge of the central magnetic steel 4 extending along a first direction so as to accommodate a corresponding solder pad.

[0041] Furthermore, in the sound-emitting unit described in the present invention, a first solder pad 211 is provided on the bracket 21 , and the position of the first solder pad 211 corresponds to the position of the first hollow portion 41 .

[0042] In the above technical solution of the utility model, a first soldering pad 211 for electrical connection is provided on the bracket 21 to ensure that the conversion between the electrical signal and the sound signal can be achieved through the first soldering pad 211 during subsequent use, thereby ensuring that the electrical signal can be transmitted smoothly.

[0043] Furthermore, in the sound-generating unit of the present invention, a voice coil lead 31 is provided on the voice coil 3 , and the voice coil lead 31 is connected to the first soldering pad 211 .

[0044] In the above technical solution of the utility model, the voice coil lead 31 is connected to the first pad 211, so as to ensure that the audio signal can be smoothly transmitted from the external circuit to the voice coil 3 of the sound unit, so as to ensure the normal operation and sound generation of the sound unit, that is, to ensure the smooth transmission of the audio signal, drive the sound unit to work normally, and generate high-quality sound.

[0045] Furthermore, in the sound-emitting unit described in the present invention, the central magnetic steel 4 is provided with a second hollow portion 42 recessed inwardly at a corner.

[0046] In the above technical solution of the present invention, a second hollow portion 42 recessed inwardly is provided at the diagonal edge of the central magnetic steel 4 so as to accommodate the corresponding welding pad.

[0047] Furthermore, in the sound-emitting unit described in the present invention, a second soldering pad 212 is provided on the bracket 21 , and the position of the second soldering pad 212 corresponds to the position of the second hollow portion 42 .

[0048] In the above technical solution of the utility model, a second soldering pad 212 for electrical connection is provided on the bracket 21 to ensure that the conversion between the electrical signal and the sound signal can be achieved through the second soldering pad 212 during subsequent use, thereby ensuring that the electrical signal can be transmitted smoothly.

[0049] Furthermore, in the sound-emitting unit described in the present invention, the bracket 21 is provided with an external connection portion 214 connected to the connecting arm 213 , and the external connection portion 214 is bonded to the bottom of the basin frame 1 .

[0050] In the above technical solution of the present invention, the shaping support piece 2 and the basin frame 1 can be fixed together by bonding the external connection portion 214 on the shaping support piece 2 to the bottom of the basin frame 1 .

[0051] Furthermore, in the sound-emitting unit described in the present invention, the vibration component includes a diaphragm 6 , and the diaphragm 6 is arranged above the basin frame 1 .

[0052] In the above technical solution of the utility model, a diaphragm 6 is arranged in the sound-emitting unit, and the diaphragm 6 is arranged on the basin frame 1, so that when the sound-emitting unit is in a working state, the voice coil 3 can drive the diaphragm 6 connected thereto to vibrate, and then the vibration of the diaphragm 6 will push the surrounding air to generate sound waves (i.e., sound).

[0053] Furthermore, in the sound-emitting unit described in the present invention, the first side magnetic steel 51 is located in the area surrounded by the connecting arm 213 .

[0054] In the above technical solution of the present invention, the first side magnetic steel 51 is arranged in the area surrounded by the connecting arm 213, which helps to improve the concentration and stability of the magnetic field and simplify the design.

[0055] Please refer to Figure 3 As for Figure 6 , Embodiment 1 of the present utility model is:

[0056] A sound-emitting unit includes a vibration component, a basin frame 1, and a magnetic circuit component and a shaped support plate 2 arranged on the basin frame 1. The vibration component includes a voice coil 3 and a diaphragm 6, and the diaphragm 6 is arranged on the basin frame 1. The magnetic circuit component includes a central magnet 4 and multiple side magnets, and the multiple side magnets are all in the shape of a rectangular parallelepiped, wherein the multiple side magnets may include two first side magnets 51 arranged in parallel along a first direction and two second side magnets 52 arranged in parallel along a second direction, wherein the first direction is a horizontal width direction, and the second direction is a horizontal length direction. It should be pointed out that the volume of the first side magnet 51 is smaller than that of the second side magnet 52, wherein there is a spacing between the two adjacent sides of the second side magnets 52, and the spacing and the two adjacent sides of the second side magnets together form a receiving area, and the two first side magnets 51 are arranged in the receiving area. In practical applications, such as Figure 4 As shown, the shortest distance between the outer sides of the two first side magnetic steels 51 is equal to the extension length of the second side magnetic steel 52 in the second direction. In addition, first gaps are respectively provided between the two ends of the first side magnetic steel 51 and the adjacent second side magnetic steels 52, and the first gaps can be used to avoid the connecting arm 213 of the fixed support plate 2. In practical applications, the voice coil 3 is in the shape of a rectangular ring, the center magnetic steel 4 is located in the area surrounded by the voice coil 3, and the four side magnetic steels are all arranged around the periphery of the voice coil 3, that is, a side magnetic steel is provided on the outer side of each side of the voice coil 3.

[0057] In this embodiment, the shaping support sheet 2 includes two brackets 21 with the same structure and symmetrically arranged. Figure 6 Specifically, the brackets 21 are described. Each bracket 21 is composed of an external connection portion 214, a connection arm 213 and a first solder pad 211 connected in sequence. The connection portion is connected to the basin frame 1, and the connection arm 213 is composed of a plurality of interconnected long straight plates. Figure 5 As shown, the long straight plate close to the center magnetic steel 4 and extending along the first direction is bonded to the bottom of the voice coil 3, and a first soldering pad 211 is provided at the middle position. The shape enclosed by the connecting arms 213 is similar to a rectangle, and the first side magnetic steel 51 is arranged in the area enclosed by the connecting arms 213. In addition, it should be noted that a voice coil lead 31 is provided on the voice coil 3, and the voice coil lead 31 is connected to the first soldering pad 211.

[0058] In this embodiment, the shape of the central magnetic steel 4 is similar to a rectangular parallelepiped, and a first hollow portion 41 recessed inward is provided on the first side edge of the central magnetic steel 4 extending along the first direction, and the first hollow portion 41 is located in the middle of the first side edge, and the position of the first solder pad 211 corresponds to the position of the first hollow portion 41. In addition, the magnetic circuit assembly also includes a central washer, which is arranged on the upper surface of the central magnetic steel 4, and the shape and size of the central washer are substantially the same as those of the central magnetic steel 4. The central washer is also provided with a plurality of third hollow portions, and the third hollow portions correspond to the positions of the first hollow portions 41. In addition, the sound-emitting unit is also provided with a yoke 7, which is arranged at the bottom of the central magnetic steel and the side magnetic steel, and the yoke is in the shape of a rectangular plate.

[0059] Please refer to Figures 7 to 9 , Embodiment 2 of the present utility model is:

[0060] A sound-emitting unit includes a vibration component, a basin frame 1, and a magnetic circuit component and a shaped support plate 2 arranged on the basin frame 1. The vibration component includes a voice coil 3 and a diaphragm 6, and the diaphragm 6 is arranged on the basin frame 1. The magnetic circuit component includes a central magnet 4 and multiple side magnets, and the multiple side magnets are all in the shape of a rectangular parallelepiped, wherein the multiple side magnets may include two first side magnets 51 arranged in parallel along a first direction and two second side magnets 52 arranged in parallel along a second direction, wherein the first direction is a horizontal width direction, and the second direction is a horizontal length direction. It should be pointed out that the volume of the first side magnet 51 is smaller than that of the second side magnet 52, wherein there is a spacing between the two adjacent sides of the second side magnets 52, and the spacing and the two adjacent sides of the second side magnets together form a receiving area, and the two first side magnets 51 are arranged in the receiving area. In practical applications, such as Figure 7 As shown, the shortest distance between the outer sides of the two first side magnetic steels 51 is equal to the extension length of the second side magnetic steel 52 in the second direction. In addition, first gaps are respectively provided between the two ends of the first side magnetic steel 51 and the adjacent second side magnetic steels 52, and the first gaps can be used to avoid the connecting arm 213 of the fixed support plate 2. In practical applications, the voice coil 3 is in the shape of a rectangular ring, the center magnetic steel 4 is located in the area surrounded by the voice coil 3, and the four side magnetic steels are all arranged around the periphery of the voice coil 3, that is, a side magnetic steel is provided on the outer side of each side of the voice coil 3.

[0061] In this embodiment, the shaping support sheet 2 includes two brackets 21 with the same structure and symmetrically arranged. Fig. 9The above bracket 21 is specifically introduced. Each bracket 21 is composed of an external connection part 214, a connecting arm 213 and a second solder pad 212 connected in sequence, wherein the above connecting part is connected to the basin frame 1, the above connecting arm 213 is composed of a plurality of mutually connected long straight plates, and the first side magnetic steel 51 is arranged in the area surrounded by the plurality of long straight plates. In this embodiment, the shape of the central magnetic steel 4 is similar to a rectangular parallelepiped, and a second hollow part 42 recessed inward is provided at the four corners of the central magnetic steel 4, and the position of the second solder pad 212 connected to the connecting arm 213 corresponds to the position of the second hollow part 42. In addition, the above magnetic circuit assembly also includes a central washer, which is arranged on the upper surface of the central magnetic steel 4, and the shape and size of the central washer are generally similar to those of the central magnetic steel 4. The central washer is also provided with a plurality of fourth hollow parts, and the fourth hollow parts correspond to the position of the first hollow part 41. In addition, it should be noted that a voice coil lead 31 is provided on the voice coil 3, and the voice coil lead 31 is connected to the second solder pad 212. The above-mentioned sound-generating unit is also provided with a yoke 7, which is arranged at the bottom of the central magnetic steel and the side magnetic steel, and the yoke is in the shape of a rectangular plate.

[0062] In summary, in the sound unit provided by the utility model, the side magnets only need to avoid the connecting arm positions of the shaped support plate, and other positions can fully surround the voice coil. That is, except for the connecting positions at the four corners of the shaped support plate, the entire voice coil is almost fully surrounded by the magnetic circuit, thereby improving performance.

[0063] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A sound generating unit, comprising: A vibration component, a basin frame, and a magnetic circuit component and a shaped support plate arranged on the basin frame, wherein the vibration component includes a voice coil, and the magnetic circuit component includes a central magnetic steel and a plurality of side magnetic steels, characterized in that the central magnetic steel is located in an area surrounded by the voice coil, and the plurality of side magnetic steels are wound around the periphery of the voice coil; the plurality of side magnetic steels include two first side magnetic steels arranged in parallel along a first direction and two second side magnetic steels arranged in parallel along a second direction, wherein there is a spacing between the mutually adjacent sides of the two second side magnetic steels, and the spacing and the mutually adjacent sides of the two second side magnetic steels together form a receiving area, the two first side magnetic steels are arranged in the receiving area, and first gaps are respectively arranged between the two ends of the first side magnetic steel and the adjacent second side magnetic steels; the shaped support plate is provided with a connecting arm, a part of the connecting arm is bonded to the bottom of the voice coil, and the other part extends outward from the first gap to extend out of the area surrounded by the plurality of side magnetic steels.

2. The sound generating unit according to claim 1, characterized in that: The shaping support piece comprises two brackets, and the connecting arm is arranged on the brackets.

3. The sound generating unit according to claim 2, characterized in that: The central magnetic steel is provided with a first hollow portion recessed inwardly on a first side extending along the first direction, and the first hollow portion is located at a middle position of the first side.

4. The sound generating unit according to claim 3, characterized in that: The bracket is provided with a first solder pad, and the position of the first solder pad corresponds to the position of the first hollow portion.

5. The sound generating unit according to claim 4, characterized in that: The voice coil is provided with a voice coil lead, and the voice coil lead is connected to the first pad.

6. The sound generating unit according to claim 2, characterized in that: The central magnetic steel is provided with a second hollow portion recessed inwardly at the corner.

7. The sound generating unit according to claim 6, characterized in that: The bracket is provided with a second soldering pad, and the position of the second soldering pad corresponds to the position of the second hollow portion.

8. The sound generating unit according to claim 2, characterized in that: The bracket is provided with an external connection part connected with the connection arm, and the external connection part is bonded to the bottom of the basin frame.

9. The sound generating unit according to claim 1, characterized in that: The vibration assembly includes a diaphragm, and the diaphragm is arranged above the basin frame.

10. The sound generating unit according to claim 1, characterized in that: The first side magnetic steel is located in a region surrounded by the connecting arm.

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