Sound production unit

Abstract

The utility model discloses a sounding unit, which comprises a frame, a magnetic circuit assembly, a diaphragm assembly and a front cover, the magnetic circuit assembly is connected with the frame, the magnetic circuit assembly comprises a magnetic cover and a central magnetic structure arranged on the magnetic cover, the central magnetic structure is provided with a through hole, the magnetic cover is provided with an upward convex structure, and the upward convex structure penetrates into the through hole; the vibrating diaphragm assembly comprises an inner fixing part, a deformation part and an outer fixing part which are sequentially connected from inside to outside, the outer fixing part is connected with the basin frame, the inner fixing part is provided with an open window, the through hole is communicated with the open window, and the inner fixing part is fixedly connected with the central magnetic structure; the outer edge of the front cover is connected with the vibrating diaphragm assembly and / or the basin frame, and the top end of the upward protruding structure is connected with the front cover. The sound production unit is novel in structure, the front cover is directly connected with the magnetic cover, the fixing strength of the front cover is effectively improved, the risk that the front cover falls off when the sound production unit falls off is reduced, and the structural stability of the sound production unit 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] As an acoustic device that can convert electrical energy into sound energy, the sound unit is now widely used in terminal electronic devices such as mobile phones and computers. The sound unit generally includes a basin frame, a magnetic circuit component, a vibration component and a support component. Some sound units also include a front cover. In the prior art, the front cover is often fixedly connected to the basin frame and / or the diaphragm component by gluing. During the drop test, the front cover is very likely to fall off, resulting in a certain proportion of drop failures in the sound unit. Utility Model Content

[0003] The technical problem solved by the utility model is to provide a sound-generating unit with a stable structure.

[0004] In order to solve the above technical problems, the first technical solution adopted by the utility model is: a sound unit, comprising:

[0005] basin stand;

[0006] A magnetic circuit assembly, the magnetic circuit assembly is connected to the basin frame, the magnetic circuit assembly comprises a magnetic cover and a central magnetic structure arranged on the magnetic cover, the central magnetic structure is provided with a through hole, the magnetic cover is provided with an upper convex structure, and the upper convex structure penetrates into the through hole;

[0007] A diaphragm assembly, the diaphragm assembly comprising an inner fixing portion, a deformation portion and an outer fixing portion connected in sequence from the inside to the outside, the outer fixing portion being connected to the basin frame, the inner fixing portion having a window, the through hole being connected to the window, and the inner fixing portion being fixedly connected to the central magnetic structure;

[0008] A front cover, the outer edge of which is connected to the diaphragm assembly and / or the basin frame, and the top of the convex structure is connected to the front cover.

[0009] In one embodiment, the upward convex structure is in the shape of a hollow convex bag.

[0010] In one embodiment, the front cover has a downward convex structure, and the front cover is connected to the upward convex structure via the downward convex structure.

[0011] In one embodiment, the downward convex structure is in the shape of a hollow convex bag.

[0012] In one embodiment, the top of the central magnetic structure has a protrusion, the protrusion protrudes upward from the window, and the protrusion is adhesively connected to the front cover.

[0013] In one embodiment, the top end of the upward convex structure is adhesively connected or welded to the front cover.

[0014] In order to solve the above technical problems, the second technical solution adopted by the present invention is: the sound unit comprises:

[0015] basin stand;

[0016] A magnetic circuit assembly, the magnetic circuit assembly is connected to the basin frame, the magnetic circuit assembly comprises a magnetic cover and a central magnetic structure arranged on the magnetic cover, and the central magnetic structure is provided with a through hole;

[0017] A diaphragm assembly, the diaphragm assembly comprising an inner fixing portion, a deformation portion and an outer fixing portion connected in sequence from the inside to the outside, the outer fixing portion being connected to the basin frame, the inner fixing portion having a window, the through hole being connected to the window, and the inner fixing portion being fixedly connected to the central magnetic structure;

[0018] A front cover, the outer edge of which is connected to the diaphragm assembly and / or the basin frame, and the front cover has a downward convex structure, and the downward convex structure passes through the through hole to connect to the magnetic cover.

[0019] In one embodiment, the downward convex structure is in the shape of a hollow convex bag.

[0020] In one embodiment, the bottom surface of the magnetic cover has a thinning groove, and the thinning groove is arranged corresponding to the downward convex structure.

[0021] In one embodiment, the top of the central magnetic structure has a protrusion, the protrusion protrudes upward from the window, and the protrusion is adhesively connected to the front cover.

[0022] The beneficial effects of the utility model are: the sound unit has a novel structure, and the front cover is directly connected to the magnetic cover, which effectively improves the fixing strength of the front cover, reduces the risk of the front cover falling off when the sound unit falls, and is beneficial to improving the structural stability of the sound unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0024] Figure 1 This is an exploded view of the sound unit of the first embodiment of the utility model;

[0025] Figure 2 It is a cross-sectional view of the sound unit of the first embodiment of the utility model;

[0026] Figure 3 It is a cross-sectional view of the sound unit of the second embodiment of the present utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the sound-emitting unit of the second embodiment of the present utility model;

[0028] Figure 5 It is a cross-sectional view of the sound unit of the third embodiment of the present utility model;

[0029] Figure 6 This is a cross-sectional view of another structure of a sound-emitting unit according to the third embodiment of the present invention.

[0030] Description of Figure Numbers:

[0031] 1. Basin stand; 11. Hot melt column;

[0032] 2. Diaphragm assembly; 21. Inner fixing portion; 22. Deformation portion; 221. Inner folding ring; 222. Framework; 223. Outer folding ring; 23. Outer fixing portion;

[0033] 3. Voice coil;

[0034] 4. front cover; 41. inner mounting portion; 42. transition portion; 43. outer mounting portion; 44. lower convex structure;

[0035] 5. Fix the adhesive layer;

[0036] 61. Magnetic cover; 611. Upper convex structure; 612. Thinning groove; 62. Center magnetic structure; 621. Lower center magnetic steel; 622. Center washer; 6231. First upper center magnetic steel; 6232. Second upper center magnetic steel; 63. Side magnetic structure; 631. Side magnetic steel; 632. Side washer; 64. Through hole;

[0037] 7. Mesh;

[0038] 8. Support components. DETAILED DESCRIPTION

[0039] The purpose, features and advantages of the present invention will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

[0040] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] It should be noted that if the embodiments of the present invention involve directional indications such as up, down, left, right, front, back, etc., then the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0042] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0043] In addition, if the meaning of "and / or" appears in the full text is to include three parallel solutions, taking "and / or" as an example, it includes solutions, or solutions, or solutions that are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field 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 scope of protection required by this utility model.

[0044] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0045] Embodiment 1

[0046] Please refer to Figure 1 and Figure 2 Embodiment 1 of the present invention is: a sound unit, including a basin frame 1, a magnetic circuit assembly, a diaphragm assembly 2, a voice coil 3 and a front cover 4, the magnetic circuit assembly and the diaphragm assembly 2 are respectively fixedly connected to the basin frame 1, the magnetic circuit assembly has a magnetic gap, the voice coil 3 is connected to the diaphragm assembly 2 and is arranged corresponding to the magnetic gap.

[0047] The magnetic circuit assembly includes a magnetic cover 61, a central magnetic structure 62 and a side magnetic structure 63, wherein the central magnetic structure 62 is fixedly connected to the magnetic cover 61, and the side magnetic structure 63 is fixedly connected to the magnetic cover 61, and the central magnetic structure 62 is located between at least one group of two side magnetic structures 63 arranged opposite to each other, and a magnetic gap is formed between the central magnetic structure 62 and the side magnetic structure 63; a through hole 64 is provided on the central magnetic structure 62, and the through hole 64 passes through the top surface of the central magnetic structure 62 and the bottom surface of the central magnetic structure 62, and an upper convex structure 611 is provided on the magnetic cover 61, and the upper convex structure 611 penetrates into the through hole 64; in this embodiment, the side magnetic structure 63 includes a connected side magnetic steel 631 and a side washer 632, and the side magnetic steel 631 and / or the side washer 632 are connected to the basin frame 1. In other embodiments, the edge magnetic structure 63 may be replaced by a flange on the magnetic cover 61 , where the flange is formed by bending a partial area of ​​the magnetic cover 61 .

[0048] The diaphragm assembly 2 includes an inner fixing portion 21, a deformation portion 22 and an outer fixing portion 23 which are connected in sequence from the inside to the outside, the outer fixing portion 23 is connected to the basin frame 1, the inner fixing portion 21 is fixedly connected to the central magnetic structure 62, the inner fixing portion 21 has a window, the through hole 64 is connected to the window, the outer edge of the front cover 4 is connected to the diaphragm assembly 2 and / or the basin frame 1, and the top of the convex structure 611 is connected to the front cover 4.

[0049] In this embodiment, in order to reduce the manufacturing consumables of the sound unit and reduce the overall weight of the sound unit, the upper convex structure 611 is in the shape of a hollow convex bag, or in other words, the upper convex structure 611 is a shell structure with an opening at the bottom, and preferably the magnetic cover 61 and the upper convex structure 611 are an integral structure formed by integral processing, and optionally, the upper convex structure 611 is stamped. In other embodiments, the upper convex structure 611 may also be a solid structure.

[0050] The top end of the upward convex structure 611 is connected to the front cover 4 by gluing or welding.

[0051] Optionally, the top of the central magnetic structure 62 has a protrusion, the protrusion protrudes upward from the window, and the protrusion is glued to the front cover 4 through the fixing glue layer 5. In this way, the central magnetic structure 62, the magnetic cover 61 and the front cover 4 can be fixedly connected to each other and form mutual support, thereby greatly improving the overall structural stability of the sound unit.

[0052] The central magnetic structure 62 includes a lower central magnetic steel 621, a central washer 622 and an upper central magnetic steel stacked and connected in sequence from bottom to top. The bottom surface of the lower central magnetic steel 621 is glued to the magnetic cover 61, and a partial area of ​​the upper central magnetic steel protrudes upward through the window to form the protrusion.

[0053] Optionally, the upper center magnetic steel includes a first upper center magnetic steel 6231 and a second upper center magnetic steel 6232 connected to each other, and at least a portion of the second upper center magnetic steel 6232 protrudes relative to the top surface of the first upper center magnetic steel 6231 to form the protrusion. To facilitate the processing and assembly of the upper center magnetic steel, in this embodiment, the bottom surface of the first upper center magnetic steel 6231 is connected to the top surface of the center washer 622, and the bottom surface of the second upper center magnetic steel 6232 is connected to the top surface of the first upper center magnetic steel 6231. Optionally, the bottom surface of the inner fixing portion 21 is adhesively connected to the top surface of the first upper center magnetic steel 6231.

[0054] The front cover 4 includes an inner mounting portion 41, a transition portion 42 and an outer mounting portion 43 which are sequentially connected from the inside to the outside. The inner mounting portion 41 is provided with a vent hole. The fixing adhesive layer 5 is connected to the bottom surface of the inner mounting portion 41. The outer mounting portion 43 is connected to the outer fixing portion 23 and / or the basin frame 1. In this embodiment, the inner mounting portion 41 is arranged higher than the outer mounting portion 43, so that sufficient activity space can be reserved for the diaphragm assembly 2. Optionally, a mesh cloth 7 covering the vent hole is provided on the inner mounting portion 41.

[0055] Optionally, a hot melt column 11 is provided on the basin frame 1, and a through hole cooperating with the hot melt column 11 is provided on the front cover 4. The hot melt connection between the front cover 4 and the basin frame 1 can greatly improve the stability of the connection between the basin frame 1 and the front cover 4, thereby further reducing the risk of the front cover 4 falling off. At the same time, it can also allow the front cover 4 to better support the central magnetic structure 62, thereby reducing the risk of separation of the central magnetic structure 62 and the magnetic cover 61.

[0056] In this embodiment, the deformation part 22 includes an inner fold ring 221, a skeleton 222 and an outer fold ring 223, the skeleton 222 connects the inner fold ring 221 and the outer fold ring 223 respectively, the voice coil 3 connects the skeleton 222, and the skeleton 222 allows the voice coil 3 to penetrate deeper into the magnetic gap, so that the magnetic field of the magnetic circuit component can be more fully utilized. In detail, the inner fold ring 221 and the outer fold ring 223 are respectively in the shape of a ring frame, the inner edge of the inner fold ring 221 is connected to the inner fixed part 21, and the outer edge of the outer fold ring 223 is connected to the outer fixed part 23. During manufacturing, the diaphragm assembly 2 can be an integrated structure of insert injection molding.

[0057] In order to improve the rolling vibration phenomenon of the voice coil 3, optionally, the sound unit further includes a support assembly 8, the support assembly 8 connects the basin frame 1 and the voice coil 3, and the support assembly 8 includes a centering support plate and / or an auxiliary membrane.

[0058] Embodiment 2

[0059] Please refer to Figure 3 and Figure 4 The second embodiment of the present utility model is a parallel technical solution of the first embodiment, and is different from the first embodiment in that the front cover 4 has a lower convex structure 44 , and the front cover 4 is connected to the upper convex structure 611 on the magnetic cover 61 through the lower convex structure 44 .

[0060] Preferably, the lower convex structure 44 is in the shape of a hollow convex bag, or in other words, the upper convex structure 611 is a shell structure with an opening at the top, and preferably the front cover 4 and the lower convex structure 44 are an integral structure formed by integral processing, and optionally, the lower convex structure 44 is stamped. In other embodiments, the lower convex structure 44 may also be a solid structure.

[0061] The hollow convex shape of the lower convex structure 44 can not only enhance the structural strength of the front cover 4 itself, but also facilitate the welding of the front cover 4 and the upper convex structure 611 .

[0062] In a specific product, the entire area of ​​the downward convex structure 44 is located outside the through hole 64 , or the bottom of the downward convex structure 44 is sunk into the through hole 64 . Both are possible.

[0063] Embodiment 3

[0064] Please refer to Figure 5 and Figure 6 Embodiment 3 of the present invention is a parallel technical solution of Embodiment 1, and is different from Embodiment 1 in that: the magnetic cover 61 does not have the upward convex structure described in Embodiment 1, but the front cover 4 has a downward convex structure 44, and the downward convex structure 44 passes through the through hole 64 of the magnetic circuit assembly to connect to the magnetic cover 61. Specifically, the bottom end of the downward convex structure 44 is connected to the magnetic cover 61.

[0065] In this embodiment, in order to reduce the manufacturing consumables of the sound unit and reduce the overall weight of the sound unit, the downward convex structure 44 is in the shape of a hollow convex bag, or in other words, the downward convex structure 44 is a shell structure with an opening at the top, and the front cover 4 and the downward convex structure 44 are preferably an integrated structure formed by integral processing, and optionally, the downward convex structure 44 is stamped. In other embodiments, the downward convex structure 44 may also be a solid structure.

[0066] The bottom end of the downward convex structure 44 is adhesively connected or welded to the magnetic cover 61. In order to make it easier to weld and fix the magnetic cover 61 and the downward convex structure 44, optionally, the bottom surface of the magnetic cover 61 has a thinning groove 612, and the thinning groove 612 is arranged corresponding to the downward convex structure 44. The thinning groove 612 can be a groove formed by subtractive molding or a pressed groove formed by pressure.

[0067] Furthermore, the top of the central magnetic structure 62 has a protrusion, which protrudes upward from the window, and is glued to the front cover 4 through the fixing glue layer 5. In this way, the central magnetic structure 62, the magnetic cover 61 and the front cover 4 can be fixedly connected to each other and form mutual support, thereby improving the overall structural stability of the sound unit to a greater extent.

[0068] The central magnetic structure 62 includes a lower central magnetic steel 621, a central washer 622 and an upper central magnetic steel stacked and connected in sequence from bottom to top. The bottom surface of the lower central magnetic steel 621 is glued to the magnetic cover 61, and a partial area of ​​the upper central magnetic steel protrudes upward through the window to form the protrusion.

[0069] Optionally, the upper center magnetic steel includes a first upper center magnetic steel 6231 and a second upper center magnetic steel 6232 connected to each other, and at least a portion of the second upper center magnetic steel 6232 protrudes relative to the top surface of the first upper center magnetic steel 6231 to form the protrusion. To facilitate the processing and assembly of the upper center magnetic steel, in this embodiment, the bottom surface of the first upper center magnetic steel 6231 is connected to the top surface of the center washer 622, and the bottom surface of the second upper center magnetic steel 6232 is connected to the top surface of the first upper center magnetic steel 6231.

[0070] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A sound unit, characterized in that: include basin stand; A magnetic circuit assembly, the magnetic circuit assembly is connected to the basin frame, the magnetic circuit assembly comprises a magnetic cover and a central magnetic structure arranged on the magnetic cover, the central magnetic structure is provided with a through hole, the magnetic cover is provided with an upper convex structure, and the upper convex structure penetrates into the through hole; A diaphragm assembly, the diaphragm assembly comprising an inner fixing portion, a deformation portion and an outer fixing portion connected in sequence from the inside to the outside, the outer fixing portion being connected to the basin frame, the inner fixing portion having a window, the through hole being connected to the window, and the inner fixing portion being fixedly connected to the central magnetic structure; A front cover, the outer edge of which is connected to the diaphragm assembly and / or the basin frame, and the top end of the convex structure is connected to the front cover.

2. The sound generating unit according to claim 1, characterized in that: The upward convex structure is in the shape of a hollow convex bag.

3. The sound generating unit according to claim 1, characterized in that: The front cover has a lower convex structure, and the front cover is connected to the upper convex structure through the lower convex structure.

4. The sound generating unit according to claim 3, characterized in that: The downward convex structure is in the shape of a hollow convex bag.

5. The sound generating unit according to claim 1, characterized in that: The top of the central magnetic structure is provided with a protrusion, the protrusion protrudes upward from the opening window, and the protrusion is adhesively connected to the front cover.

6. The sound generating unit according to claim 1, characterized in that: The top end of the upward convex structure is adhesively connected or welded to the front cover.

7. A sound generating unit, characterized in that: include basin stand; A magnetic circuit assembly, the magnetic circuit assembly is connected to the basin frame, the magnetic circuit assembly comprises a magnetic cover and a central magnetic structure arranged on the magnetic cover, and the central magnetic structure is provided with a through hole; A diaphragm assembly, the diaphragm assembly comprising an inner fixing portion, a deformation portion and an outer fixing portion connected in sequence from the inside to the outside, the outer fixing portion being connected to the basin frame, the inner fixing portion having a window, the through hole being connected to the window, and the inner fixing portion being fixedly connected to the central magnetic structure; A front cover, the outer edge of which is connected to the diaphragm assembly and / or the basin frame, and the front cover has a downward convex structure, and the downward convex structure passes through the through hole to connect to the magnetic cover.

8. The sound generating unit according to claim 7, characterized in that: The downward convex structure is in the shape of a hollow convex bag.

9. The sound generating unit according to claim 7, characterized in that: The bottom surface of the magnetic cover has a thinning groove, and the thinning groove is arranged corresponding to the downward convex structure.

10. The sound generating unit according to claim 7, characterized in that: The top of the central magnetic structure is provided with a protrusion, the protrusion protrudes upward from the opening window, and the protrusion is adhesively connected to the front cover.

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