Sound production unit

Abstract

The utility model discloses a sounding unit, which comprises a frame, a magnetic circuit assembly, a diaphragm assembly, a front cover and a cushion, and is characterized in that the magnetic circuit assembly is fixedly connected with the frame and comprises a magnetic cover and a central magnetic structure adhered to the magnetic cover; 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 inner fixing part is fixedly connected with the central magnetic structure, the inner fixing part is provided with a window, and the outer fixing part is connected with the basin stand; the edge of the front cover is connected with the outer fixing part and / or the basin stand; the top of the central magnetic structure protrudes towards the direction far away from the magnetic cover through the window to form a protruding part; the bottom surface of the buffer pad abuts against the top surface of the protruding part, and the top surface of the buffer pad abuts against the side, close to the magnetic cover, of the front cover. The sound production unit is novel in structure, when the sound production unit is in a drop test, the buffer pad can play a role in buffering, and the front cover can support the central magnetic structure to a certain extent through the buffer pad, so that the risk that the central magnetic structure is separated from the magnetic cover is reduced, and the pass rate of the drop test is ensured.

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 magnetic circuit component, a vibration component and a support component, wherein the magnetic circuit component includes a magnetic cover and a central magnetic structure connected to the magnetic cover.

[0003] The drop test is an important indicator to test the reliability of the sound unit. During the drop test, it is very easy to have undesirable phenomena such as the separation of the central magnetic structure and the magnetic cover. To solve this problem, the existing technology chooses to make an embossed structure or add a glue groove on the surface of the magnetic cover that is bonded to the central magnetic structure. However, the embossed structure or glue groove alone cannot effectively improve the bonding force between the magnetic cover and the central magnetic structure, and there is still a certain proportion of drop defects. Utility Model Content

[0004] The technical problem solved by the utility model is to provide a sound-generating unit whose central magnetic structure and magnetic cover are not easily separated.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a sound unit, comprising:

[0006] basin stand;

[0007] A magnetic circuit assembly, the magnetic circuit assembly is fixedly connected to the basin frame, and the magnetic circuit assembly includes a magnetic cover and a central magnetic structure bonded to the magnetic cover;

[0008] A diaphragm assembly, the diaphragm assembly comprising an inner fixing portion, a deformation portion and an outer fixing portion which are sequentially connected from the inside to the outside, the inner fixing portion is fixedly connected to the central magnetic structure, the inner fixing portion has a window, and the outer fixing portion is connected to the basin frame;

[0009] A front cover, the edge of which is connected to the outer fixing portion and / or the basin frame;

[0010] The top of the central magnetic structure protrudes through the opening toward a direction away from the magnetic cover to form a protrusion;

[0011] A buffer pad, wherein the bottom surface of the buffer pad abuts against the top surface of the protruding portion, and the top surface of the buffer pad abuts against a side of the front cover close to the magnetic cover.

[0012] In one embodiment, the buffer pad is bonded and fixed to the front cover and / or the protrusion.

[0013] In one embodiment, the buffer pad is a foam pad or a rubber pad.

[0014] In one embodiment, the central magnetic structure includes a lower central magnetic steel, a central washer and an upper central magnetic steel stacked and connected in sequence from bottom to top, the bottom surface of the lower central magnetic steel is adhesively connected to the magnetic cover, and a partial area of ​​the upper central magnetic steel protrudes upward through the window to form the protrusion.

[0015] In one embodiment, the upper center magnetic steel includes a first upper center magnetic steel and a second upper center magnetic steel connected to each other, and at least a portion of the second upper center magnetic steel protrudes relative to a top surface of the first upper center magnetic steel to form the protrusion.

[0016] In one embodiment, the bottom surface of the first upper center magnetic steel is connected to the top surface of the center washer, and the bottom surface of the second upper center magnetic steel is connected to the top surface of the first upper center magnetic steel.

[0017] In one embodiment, the bottom surface of the inner fixing portion is adhesively connected to the top surface of the first upper center magnetic steel.

[0018] In one embodiment, the front cover includes an inner mounting portion, a transition portion, and an outer mounting portion which are sequentially connected from the inside to the outside, the inner mounting portion is provided with an air vent, the buffer pad abuts against the bottom surface of the inner mounting portion, and the outer mounting portion is connected to the external fixing portion and / or the basin frame.

[0019] In one embodiment, a mesh covering the air holes is provided on the inner mounting portion.

[0020] In one embodiment, the deformation portion includes an inner fold ring, a frame and an outer fold ring, the frame is respectively connected to the inner fold ring and the outer fold ring, and also includes a voice coil, and the voice coil is connected to the frame.

[0021] The beneficial effects of the utility model are: the sound unit has a novel structure, and the buffer pad can play a buffering effect when the sound unit is subjected to a drop test, and the front cover can provide a certain degree of support for the central magnetic structure through the buffer pad, thereby reducing the risk of the central magnetic structure detaching from the magnetic cover, improving the structural stability of the sound unit, and facilitating ensuring the pass rate of the drop test. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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.

[0023] Figure 1 This is an exploded view of the sound unit of the first embodiment of the utility model;

[0024] Figure 2 It is a cross-sectional view of the sound unit of the first embodiment of the utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the sound unit of Embodiment 1 of the utility model after being hidden by the front cover.

[0026] Description of Figure Numbers:

[0027] 1. Basin stand; 11. Hot melt column;

[0028] 2. Diaphragm assembly; 21. Inner fixing portion; 22. Deformation portion; 221. Inner folding ring; 222. Framework; 223. Outer folding ring; 23. Outer fixing portion;

[0029] 3. Voice coil;

[0030] 4. front cover; 41. inner mounting portion; 42. transition portion; 43. outer mounting portion;

[0031] 5. Buffer pad;

[0032] 61. Magnetic cover; 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;

[0033] 7. Mesh;

[0034] 8. Support components. DETAILED DESCRIPTION

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] Embodiment 1

[0042] Please refer to Figures 1 to 3 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, a front cover 4 and a buffer pad 5, the magnetic circuit assembly and the diaphragm assembly 2 are 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.

[0043] The magnetic circuit assembly includes a magnetic cover 61, a central magnetic structure 62 and a side magnetic structure 63. The central magnetic structure 62 is adhesively fixed to the magnetic cover 61. The side magnetic structure 63 is fixedly connected to the magnetic cover 61. The central magnetic structure 62 is located between at least one group of two side magnetic structures 63 arranged opposite to each other. The magnetic gap is formed between the central magnetic structure 62 and the side magnetic structure 63. In this embodiment, the side magnetic structure 63 includes a side magnetic steel 631 and a side washer 632 connected to each other. The side magnetic steel 631 and / or the side washer 632 are connected to the basin frame 1. In other embodiments, the side magnetic structure 63 can also be replaced by the flange on the magnetic cover 61. The flange is formed by bending a part of the magnetic cover 61.

[0044] 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 inner fixing portion 21 is fixedly connected to the central magnetic structure 62, the inner fixing portion 21 has a window, and the outer fixing portion 23 is connected to the basin frame 1; the edge of the front cover 4 is connected to the outer fixing portion 23 and / or the basin frame 1; the top of the central magnetic structure 62 protrudes through the window in a direction away from the magnetic cover 61 to form a protrusion, the bottom surface of the buffer pad 5 abuts against the top surface of the protrusion, and the top surface of the buffer pad 5 abuts against the side of the front cover 4 close to the magnetic cover 61.

[0045] To further improve the structural stability of the sound unit, the buffer pad 5 is optionally bonded and fixed to the front cover 4 and / or the protrusion. In a specific product, it is also acceptable that the buffer pad 5 is fixed between the front cover 4 and the protrusion only by clamping. In this case, in the assembled sound unit, the buffer pad 5 is always in a slightly compressed state.

[0046] The buffer pad 5 is a foam pad or a rubber pad. In this embodiment, the buffer pad 5 is a heat-resistant silicone pad.

[0047] 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.

[0048] 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.

[0049] 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 an air hole, the buffer pad 5 contacts the bottom surface of the inner mounting portion 41, and 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 air hole is provided on the inner mounting portion 41.

[0050] 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, so that the front cover 4 can better support the central magnetic structure 62.

[0051] 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.

[0052] 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.

[0053] 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 fixedly connected to the basin frame, and the magnetic circuit assembly includes a magnetic cover and a central magnetic structure bonded to the magnetic cover; A diaphragm assembly, the diaphragm assembly comprising an inner fixing portion, a deformation portion and an outer fixing portion which are sequentially connected from the inside to the outside, the inner fixing portion is fixedly connected to the central magnetic structure, the inner fixing portion has a window, and the outer fixing portion is connected to the basin frame; A front cover, the edge of which is connected to the outer fixing portion and / or the basin frame; The top of the central magnetic structure protrudes through the opening toward a direction away from the magnetic cover to form a protrusion; A buffer pad, wherein the bottom surface of the buffer pad abuts against the top surface of the protruding portion, and the top surface of the buffer pad abuts against a side of the front cover close to the magnetic cover.

2. The sound generating unit according to claim 1, characterized in that: The buffer pad is bonded and fixed to the front cover and / or the protruding portion.

3. The sound generating unit according to claim 1, characterized in that: The buffer pad is a foam pad or a rubber pad.

4. The sound generating unit according to claim 1, characterized in that: The central magnetic structure includes a lower central magnetic steel, a central washer and an upper central magnetic steel stacked and connected in sequence from bottom to top, the bottom surface of the lower central magnetic steel is adhesively connected to the magnetic cover, and a partial area of ​​the upper central magnetic steel protrudes upward through the window to form the protrusion.

5. The sound generating unit according to claim 4, characterized in that: The upper center magnetic steel includes a first upper center magnetic steel and a second upper center magnetic steel connected to each other, and at least a portion of the second upper center magnetic steel protrudes relative to the top surface of the first upper center magnetic steel to form the protrusion.

6. The sound generating unit according to claim 5, characterized in that: The bottom surface of the first upper center magnetic steel is connected to the top surface of the center washer, and the bottom surface of the second upper center magnetic steel is connected to the top surface of the first upper center magnetic steel.

7. The sound generating unit according to claim 6, characterized in that: The bottom surface of the inner fixing portion is adhesively connected to the top surface of the first upper center magnetic steel.

8. The sound generating unit according to claim 1, characterized in that: The front cover includes an inner mounting portion, a transition portion and an outer mounting portion which are sequentially connected from the inside to the outside, the inner mounting portion is provided with an air vent, the buffer pad abuts against the bottom surface of the inner mounting portion, and the outer mounting portion is connected to the outer fixing portion and / or the basin frame.

9. The sound generating unit according to claim 8, characterized in that: The inner installation part is provided with a mesh cloth covering the air holes.

10. The sound generating unit according to claim 1, characterized in that: The deformation part includes an inner fold ring, a frame and an outer fold ring, the frame is respectively connected to the inner fold ring and the outer fold ring, and also includes a voice coil, and the voice coil is connected to the frame.

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