Sound production unit

Abstract

The utility model discloses a sounding unit, which comprises a magnetic cover, an edge magnetic structure and a diaphragm assembly, the magnetic cover comprises a bottom plate and a surrounding wall which are connected with each other, and the surrounding wall is arranged along the edge of the bottom plate; the side magnetic structure comprises side magnetic steel and a side washer, the bottom of the side magnetic steel is connected with the bottom plate, the top of the side magnetic steel is connected with the side washer, and the side washer is welded to the enclosure bulkhead; and the vibrating diaphragm assembly is connected with the enclosure bulkhead. The sounding unit uses the enclosure bulkhead of the magnetic cover as the basin stand, thereby being beneficial to simplifying the structure of the sounding unit and reducing the manufacturing cost of the sounding unit; other areas, except the vibrating diaphragm side, of the sound production unit are protected by the magnetic cover, the structural strength of the sound production unit is effectively improved, and the side washer is fixedly connected with the side magnetic steel and is also welded with the enclosure wall of the magnetic cover, so that the structural stability of the sound production unit is greatly improved, the falling risk of the side magnetic structure is reduced, and the service life of the sound production unit is prolonged. And the anti-falling capability of the sound production unit is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electroacoustic transducers, and particularly to a sounding unit. Background Art

[0002] As a common electroacoustic transducer for converting electrical energy into sound energy, the sounding unit plays an indispensable role in the sound reproduction system.

[0003] With the thinning of consumer electronic products such as mobile phones and tablet computers, the sounding unit is also forced to develop in the direction of thinning. However, the thin and light sounding unit is prone to the situation of weak overall strength, resulting in damage to the sounding unit when the electronic product drops during normal use, leading to poor sound production. Summary of the Utility Model

[0004] The technical problem solved by the utility model is to provide a sounding unit with a stable structure.

[0005] To solve the above technical problem, the technical solution adopted by the utility model is: a sounding unit, comprising:

[0006] A magnetic cover, the magnetic cover includes a bottom plate and a surrounding wall connected to each other, and the surrounding wall is arranged along the edge of the bottom plate;

[0007] A side magnetic structure, the side magnetic structure includes a side magnet and a side washer, the bottom of the side magnet is connected to the bottom plate, the top of the side magnet is connected to the side washer, and the side washer is welded to the surrounding wall;

[0008] A diaphragm assembly, the diaphragm assembly is connected to the surrounding wall.

[0009] In one embodiment, the magnetic cover is a stamping structure formed by stamping.

[0010] In one embodiment, the side washer is integrally in a ring frame shape.

[0011] In one embodiment, it further includes a voice coil and a centering washer, the voice coil is fixedly connected to the diaphragm assembly, one end of the centering washer is located in the hollow area of the magnetic cover and is fixedly connected to the voice coil, the other end of the centering washer extends out of the magnetic cover, and the centering washer is electrically conductive with the voice coil.

[0012] In one embodiment, a blocking portion is provided at the edge of the side washer, a through groove is provided at the upper part of the surrounding wall, the blocking portion is located in the through groove, the other end of the centering washer extends out of the magnetic cover through the through groove, and the blocking portion is welded to the surrounding wall.

[0013] In one embodiment, the blocking portion is formed by bending a partial area of the side washer.

[0014] In one embodiment, the outer wall of the side washer contacts the inner side surface of the surrounding wall.

[0015] In one embodiment, the magnetic cover is provided with ventilation holes.

[0016] In one embodiment, it further includes a metal cover plate, which is welded on the magnetic cover and located outside the magnetic cover. The metal cover plate is provided with a plurality of air discharge holes, and the air discharge holes communicate with the ventilation holes.

[0017] In one embodiment, the magnetic cover is provided with a pressing groove, and at least part of the area of the metal cover plate is located in the pressing groove.

[0018] The beneficial effects of the present utility model are as follows: The present sounding unit uses the surrounding wall of the magnetic cover as a chassis, which is conducive to simplifying the structure of the sounding unit and reducing the manufacturing cost of the sounding unit; other areas of the sounding unit except the diaphragm side are protected by the magnetic cover, effectively improving the structural strength of the sounding unit. Moreover, the side washer is not only fixedly connected to the side magnet, but also welded to the surrounding wall of the magnetic cover, further greatly improving the structural stability of the sounding unit, reducing the risk of the side magnet structure falling off, and improving the anti-drop ability of the sounding unit. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0020] Figure 1 It is an exploded view of the sounding unit according to Embodiment 1 of the present utility model;

[0021] Figure 2 ]>It is a cross-sectional view of the sounding unit according to Embodiment 1 of the present utility model;

[0022] Figure 3 It is a structural schematic diagram of a partial structure of the sounding unit according to Embodiment 1 of the present utility model.

[0023] Explanation of the Reference Numerals in the Drawings:

[0024] 1. Magnetic cover; 11. Bottom plate; 111. Pressing groove; 12. Surrounding wall; 121. Through groove; 13. Ventilation hole;

[0025] 2. Side magnet structure; 21. Side magnet; 22. Side washer; 221. Blocking portion;

[0026] 3. Central magnet structure;

[0027] 4. Diaphragm assembly;

[0028] 5. Voice coil

[0029] 6. Centering support piece

[0030] 7. Metal cover plate; 71. Air vent Detailed implementation manners

[0031] The realization of the purpose, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings.

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0033] It should be noted that if there are directional indications such as up, down, left, right, front, back... in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indications will also change accordingly.

[0034] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature.

[0035] In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions. Taking "and / or" as an example, it includes the solution, or the solution, or the solution that satisfies both simultaneously. In addition, the technical solutions between the embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0036] In this application, unless otherwise clearly specified and defined, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] Embodiment 1

[0038] Please refer to Figures 1 to 3 , Embodiment 1 of the present utility model is as follows: a sounding unit, including a magnetic cover 1, a side magnetic structure 2, a central magnetic structure 3, a diaphragm assembly 4 and a voice coil 5. The magnetic cover 1 includes a bottom plate 11 and a surrounding wall 12 connected to each other, and the surrounding wall 12 is arranged along the edge of the bottom plate 11;

[0039] The central magnet and the side magnetic structure 2 are respectively arranged on the bottom plate 11, and a magnetic gap for the voice coil 5 to move is formed between the central magnet and the side magnetic structure 2. Specifically, the central magnet includes a central magnet and a central washer, the bottom surface of the central magnet is connected to the bottom plate 11, and the top surface of the central magnet is connected to the central washer; the side magnetic structure 2 includes a side magnet 21 and a side washer 22, the bottom of the side magnet 21 is connected to the bottom plate 11, the top of the side magnet 21 is connected to the side washer 22, and the side washer 22 is welded to the surrounding wall 12;

[0040] The diaphragm assembly 4 is fixedly connected to the surrounding wall 12 and the voice coil 5. Specifically, the diaphragm assembly 4 includes a voice membrane and a dome connected to each other. The voice membrane includes an inner fixing part, a folding ring part and an outer fixing part connected in sequence from inside to outside. The outer fixing part is connected to the surrounding wall 12, and the dome is arranged on the inner fixing part.

[0041] Preferably, the magnetic cover 1 is a stamping structure formed by stamping, that is to say, the bottom plate 11 and the surrounding wall 12 are an integral structure processed from a piece of metal sheet. In the integral magnetic cover 1, there is no risk of separation between the bottom plate 11 and the surrounding wall 12.

[0042] For the convenience of assembly and to increase the welding area between the side washer 22 and the surrounding wall 12 so as to improve the structural stability of the sounding unit to a greater extent, in this embodiment, the side washer 22 is integrally in a ring frame shape. Of course, in other embodiments, the number of the side magnetic structures 2 can also be multiple groups. At this time, the number of the side washers 22 is the same as the number of the side magnets 21 and they are arranged in one-to-one correspondence.

[0043] The sound generating unit further includes a centering support piece 6, which can be an FPC board. One end of the centering support piece 6 is located in the hollow area of the magnetic cover 1 and is fixedly connected to the voice coil 5. The other end of the centering support piece 6 extends out of the magnetic cover 1. The centering support piece 6 is electrically connected to the voice coil 5, that is, an external power supply supplies power to the voice coil 5 through the centering support piece 6.

[0044] In this embodiment, a blocking portion 221 is provided at the edge of the edge washer 22. An overgroove 121 is provided at the upper part of the surrounding wall 12. The blocking portion 221 is located in the overgroove 121. The other end of the centering support piece 6 extends out of the magnetic cover 1 through the overgroove 121. The blocking portion 221 is welded to the surrounding wall 12. Preferably, when welding the blocking portion 221 and the surrounding wall 12, the gap between the blocking portion 221 and the surrounding wall 12 is sealed with solder. During the assembly of the sound generating unit, the centering support piece 6 is assembled earlier than the edge washer 22. In this way, after a part of the centering support piece 6 is inserted into the overgroove 121, the blocking portion 221 seals the overgroove 121.

[0045] Optionally, a sealing colloid is further included. The sealing colloid is located at the overgroove 121 and contacts the centering support piece 6, the surrounding wall 12 portion and the blocking portion 221 respectively, so as to fill the gaps among the three.

[0046] Preferably, the blocking portion 221 is formed by bending a part of the edge washer 22.

[0047] To reduce the risk of welding failure between the edge washer 22 and the surrounding wall 12, the outer wall of the edge washer 22 contacts the inner side surface of the surrounding wall 12. The edge washer 22 in the shape of an annular frame will not have a tendency to shake inside the magnetic cover 1, so the solder between the edge washer 22 and the surrounding wall 12 will not break and fail.

[0048] The magnetic cover 1 is provided with a vent hole 13, and the vent hole 13 communicates the internal space of the sound generating unit with the outside.

[0049] In this embodiment, the sound generating unit further includes a metal cover plate 7. The metal cover plate 7 is welded on the magnetic cover 1 and is located outside the magnetic cover 1. A plurality of air discharge holes 71 are provided on the metal cover plate 7, and the air discharge holes 71 communicate with the vent hole 13.

[0050] To facilitate the positioning and installation of the metal cover plate 7, a pressing groove 111 is provided on the magnetic cover 1. At least a part of the metal cover plate 7 is located in the pressing groove 111. In this embodiment, the pressing groove 111 is provided on the bottom surface of the bottom plate 11.

[0051] The above are only alternative embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made under the inventive concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.

Claims

1. Sound generating unit, characterized in that: Comprising A magnetic cover, the magnetic cover includes a connected bottom plate and a surrounding wall, and the surrounding wall is arranged along the edge of the bottom plate; An edge magnetic structure, the edge magnetic structure includes an edge magnet and an edge washer, the bottom of the edge magnet is connected to the bottom plate, the top of the edge magnet is connected to the edge washer, and the edge washer is welded to the surrounding wall; A diaphragm assembly, the diaphragm assembly is connected to the surrounding wall.

2. The sound generating unit according to claim 1, wherein: The magnetic cover is a stamping structure formed by stamping.

3. The sound generating unit according to claim 1, wherein: The edge washer is integrally in a ring frame shape.

4. The sound generating unit according to claim 1, wherein: It further includes a voice coil and a centering washer, the voice coil is fixedly connected to the diaphragm assembly, one end of the centering washer is located in the hollow area of the magnetic cover and is fixedly connected to the voice coil, the other end of the centering washer extends out of the magnetic cover, and the centering washer is electrically conductive with the voice coil.

5. The sound generating unit according to claim 4, characterized in that: A blocking portion is provided at the edge of the edge washer, an over groove is provided at the upper part of the surrounding wall, the blocking portion is located in the over groove, the other end of the centering washer extends out of the magnetic cover through the over groove, and the blocking portion is welded to the surrounding wall.

6. The sound generating unit according to claim 5, characterized in that: The blocking portion is formed by bending a partial area of the edge washer.

7. The sound generating unit according to claim 1, wherein: The outer wall of the edge washer contacts the inner side surface of the surrounding wall.

8. The sound generating unit according to claim 1, wherein: Vent holes are provided on the magnetic cover.

9. The sound generating unit according to claim 8, wherein: It further includes a metal cover plate, the metal cover plate is welded on the magnetic cover and is located outside the magnetic cover, and a plurality of air discharge holes are provided on the metal cover plate, and the air discharge holes communicate with the vent holes.

10. The sound generating unit according to claim 9, wherein: A pressing groove is provided on the magnetic cover, and at least a partial area of the metal cover plate is located in the pressing groove.

Images