Sound production unit

Abstract

The utility model discloses a sounding unit, comprising a diaphragm assembly and a magnetic circuit assembly, the diaphragm assembly comprises a central part; the magnetic circuit assembly comprises a yoke and a central magnetic structure arranged on the yoke, the central magnetic structure is located below the central part, and a plurality of protrusions are arranged on the top face of the central magnetic structure. The sounding unit is novel in structure, in a diving test, when the central part of the vibrating diaphragm assembly is extruded by water pressure to be attached to the central magnetic structure, the central part is only attached to the upper end face of the bulge, other positions are in a suspended state, and no negative pressure is formed to generate adsorption force between the central part and the central magnetic structure; the problem that the sounding unit loses efficacy due to the fact that the central part of the vibrating diaphragm assembly is attracted to the central magnetic structure and cannot rebound is effectively avoided. The sound production unit can be obtained by transforming an existing sound production unit, and has the advantage of being easy to popularize and apply.

Description

TECHNICAL FIELD

[0001] The utility model relates to electroacoustic transducer technical field, especially relates to sound unit. BACKGROUND

[0002] Sound unit is the acoustic product of electric signal conversion for sound signal, at present, the waterproof level requirement of many electronic products is higher, for example, smart watch, bracelet etc, this needs to do diving test to sound unit.

[0003] When doing diving test, the central part of diaphragm assembly is extruded by water pressure and pasted to center magnetic structure, at the same time, the air in sound unit is discharged, after the air is discharged, the planar central part is tightly pasted on center magnetic structure by forming suction cup effect under negative pressure, after sound unit is taken out from water, water pressure disappears, but due to the existence of suction cup effect, the central part of diaphragm assembly cannot rebound, which will lead to sound unit failure. UTILITY MODEL CONTENT

[0004] The utility model discloses a sound unit, which aims to solve the technical problem that the central part of the diaphragm assembly is easily adsorbed to the center magnetic structure, resulting in sound unit failure.

[0005] In order to solve the above technical problem, the utility model adopts the technical scheme as follows: a sound unit comprises:

[0006] A diaphragm assembly comprises a central part.

[0007] A magnetic circuit assembly comprises a yoke and a center magnetic structure arranged on the yoke, the center magnetic structure is located below the central part, and the top surface of the center magnetic structure is provided with a plurality of protrusions.

[0008] In an embodiment, the number of protrusions is one, and the protrusion is arranged in a strip shape along the central axis of the length direction of the center magnetic structure, or arranged in a strip shape along the central axis of the width direction of the center magnetic structure, or located in the central region of the top surface of the center magnetic structure.

[0009] In an embodiment, the number of protrusions is multiple.

[0010] In an embodiment, the number of protrusions is even, and the even number of protrusions are symmetrically arranged.

[0011] In an embodiment, the number of protrusions is odd, one of the protrusions is located in the central region of the top surface of the center magnetic structure, and the remaining protrusions are divided into two groups symmetrically arranged.

[0012] In an embodiment, the number of the protrusions is five, one of the protrusions is located at the central region of the top surface of the central magnetic structure, and the remaining four protrusions are respectively arranged near the four corner portions of the top surface of the central magnetic structure.

[0013] In an embodiment, the protrusions are in a columnar shape.

[0014] In an embodiment, the protrusions are in a cylindrical shape, an elliptical cylindrical shape or a prismatic shape.

[0015] In an embodiment, the central magnetic structure comprises a central magnetic steel and a central dust core located at the top surface of the central magnetic steel, the central magnetic steel is respectively connected with the central dust core and the yoke, the protrusions and the central dust core are in an integrated structure formed by integral processing, or the protrusions and the central dust core are connected by gluing, welding or hot melting.

[0016] In an embodiment, the bottom surface of the central dust core has a groove corresponding to the protrusions.

[0017] The sound generating unit has the advantages that: the sound generating unit structure is novel, when conducting a diving test, the central portion of the diaphragm assembly is pressed by water pressure and is attached to the central magnetic structure, only the upper end surface of the protrusion is attached, other positions are in a suspended state, no negative pressure is formed to generate an adsorption force between the central portion and the central magnetic structure, the problem that the central portion of the diaphragm assembly is adsorbed to the central magnetic structure and cannot rebound to cause the sound generating unit to fail is effectively avoided. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, and obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative labor.

[0019] Figure 1 It is an exploded view of the sound generating unit of the embodiment one of the present application.

[0020] Figure 2 It is a sectional view of the sound generating unit of the embodiment one of the present application.

[0021] Figure 3 It is a structural schematic view of the central dust core in the sound generating unit of the embodiment two of the present application.

[0022] Figure 4 It is a sectional view of the sound generating unit of the embodiment three of the present application.

[0023] BRIEF DESCRIPTION OF DRAWINGS

[0024] 1. A yoke;

[0025] 2. A voice coil;

[0026] 3. A diaphragm assembly; 31, an outer edge portion; 32, a deformation portion; 33, a central portion; 331, a spherical top;

[0027] 4. A magnetic circuit assembly; 41, a yoke; 42, a center magnetic structure; 421, a center magnetic steel; 422, a center dust shield; 4221, a groove; 423, a protrusion; 43, an edge magnetic structure. DETAILED DESCRIPTION

[0028] The purposes, functional features and advantages of the present application will be further described in conjunction with embodiments and with reference to the accompanying drawings.

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0030] It should be noted that if the embodiments of the present application involve directional indications such as up, down, left, right, front, back, etc., the directional indications are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain specific posture, such as shown in the accompanying drawings. If the specific posture changes, the directional indications also change accordingly.

[0031] In addition, if the embodiments of the present application involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features with "first" and "second" can explicitly or implicitly include at least one of the features.

[0032] In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel schemes. Taking "and / or" as an example, it includes scheme, or scheme, or and simultaneously satisfies the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it. When the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection required by the present application.

[0033] In this application, unless otherwise expressly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and other terms should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0034] Embodiment one

[0035] Please refer to Figure 1 and Figure 2 Embodiment one of the utility model is: sound unit, including basin frame 1, voice coil 2, diaphragm assembly 3 and magnetic circuit assembly 4, the diaphragm assembly 3 includes the outer edge portion 31, the deformation portion 32 and the central portion 33 that are sequentially connected from outside to inside, the outer edge portion 31 is connected the basin frame 1, the central portion 33 connects the voice coil 2;The magnetic circuit assembly 4 includes yoke 41 and the center magnetic structure 42 and the edge magnetic structure 43 respectively arranged on the yoke 41, the yoke 41 and / or the edge magnetic structure 43 connect the basin frame 1, the magnetic gap for the voice coil 2 activity is formed between the edge magnetic structure 43 and the center magnetic structure 42, the center magnetic structure 42 is located below the central portion 33, the top surface of the center magnetic structure 42 is provided with a plurality of protrusions 423, when the central portion 33 is subjected to the pressure towards the yoke 41, the small area of the side of the central portion 33 close to the yoke 41 contacts the upper end surface of the protrusion 423, and the most area of the central portion 33 does not contact the top surface of the center magnetic structure 42.

[0036] In this embodiment, the diaphragm assembly 3 includes a sound film and a ball top 331, the sound film includes an inner fixed portion, a folding ring portion and an outer fixed portion sequentially connected from inside to outside, wherein the folding ring portion is the aforementioned deformation portion 32, the outer fixed portion is the aforementioned outer edge portion 31, and the inner fixed portion is arranged along the edge of the ball top 331 and constitutes the central portion 33 together with the ball top 331, when the central portion 33 is subjected to the pressure towards the yoke 41, the ball top 331 contacts the upper end surface of the protrusion 423. In other embodiments, the diaphragm assembly 3 does not have the ball top 331, at this time, the inner fixed portion is the aforementioned central portion 33.

[0037] The edge magnetic structure 43 includes an edge magnetic steel and an edge Halsier, the edge Halsier and the edge magnetic steel are connected, in specific products, the edge Halsier and / or the edge magnetic steel connect the basin frame 1.

[0038] Optionally, the number of the protrusions 423 is multiple, when the number of the protrusions 423 is even, the even number of the protrusions 423 are symmetrically arranged, specifically, the even number of the protrusions 423 are divided into two groups which are symmetrically arranged; when the number of the protrusions 423 is odd, one of the protrusions 423 is located at the central region of the top surface of the center magnetic structure 42, and the remaining protrusions 423 are divided into two groups which are symmetrically arranged.

[0039] In the embodiment, the number of the protrusions 423 is five, one of the protrusions 423 is located at the central region of the top surface of the center magnetic structure 42, and the remaining four protrusions 423 are respectively arranged near the four corner regions of the top surface of the center magnetic structure 42.

[0040] Optionally, the protrusion 423 is in a columnar shape, for example, in a cylindrical shape, an elliptical cylindrical shape, a prismatic shape, etc.

[0041] The center magnetic structure 42 comprises a center magnetic steel 421 and a center dust core 422 located at the top surface of the center magnetic steel 421, the center magnetic steel 421 is respectively connected with the center dust core 422 and the yoke 41, in the embodiment, the protrusion 423 and the center dust core 422 are an integrated structure which is integrally processed and formed, in other embodiments, the protrusion 423 and the center dust core 422 can also be a split structure, at this time, the protrusion 423 and the center dust core 422 are connected by gluing, welding, hot melting or other ways, the material of the protrusion 423 comprises but is not limited to metal, plastic.

[0042] Embodiment two

[0043] Please refer to Figure 3 The embodiment two of the utility model discloses the parallel technical scheme of embodiment one, which is different from embodiment one in that the number of the protrusion 423 is one, the protrusion 423 is arranged in a strip shape along the central axis of the center magnetic structure in the length direction; or the protrusion 423 is arranged in a strip shape along the central axis of the center magnetic structure in the width direction; or the protrusion 423 is located at the central region of the top surface of the center magnetic structure.

[0044] In the embodiment, the protrusion 423 is arranged in a strip shape along the central axis of the center dust core 422 in the length direction.

[0045] Embodiment three

[0046] Please refer to Figure 4The difference between the third embodiment of the utility model and the first embodiment is that the bottom surface of the center shaft 422 has a groove 4221 corresponding to the protrusion 423, the existence of the groove 4221 can not only reduce the manufacturing materials of the center shaft 422, save the manufacturing cost of the center shaft 422, but also make the protrusion 423 become a stamping structure that can be formed by stamping, so as to process and manufacture the protrusion 423.

[0047] The above is only an optional embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation made by using the utility model specification and the attached drawings, or direct / indirect application in other related technical fields is included in the patent protection range of the utility model.

Claims

1. A sound emitting unit, characterized by: Comprising A diaphragm assembly comprising a central portion; A magnetic circuit assembly comprising a yoke and a center magnetic structure provided on the yoke, the center magnetic structure being located below the central portion, and the top surface of the center magnetic structure being provided with a plurality of protrusions.

2. The sound producing unit of claim 1, wherein: The number of protrusions is one, and the protrusions are arranged in a strip shape along the central axis of the center magnetic structure in the length direction of the center magnetic structure; or the protrusions are arranged in a strip shape along the central axis of the center magnetic structure in the width direction of the center magnetic structure; or the protrusions are located in the central region of the top surface of the center magnetic structure.

3. The sound producing unit of claim 1, wherein: The number of protrusions is more than one.

4. The sound producing unit of claim 3, wherein: The number of protrusions is an even number, and the even number of protrusions are symmetrically arranged.

5. The sound producing unit of claim 3, wherein: The number of protrusions is an odd number, one of the protrusions is located in the central region of the top surface of the center magnetic structure, and the remaining protrusions are divided into two symmetrically arranged groups.

6. The sound producing unit of claim 5, wherein: The number of protrusions is five, one of the protrusions is located in the central region of the top surface of the center magnetic structure, and the remaining four protrusions are respectively arranged near the four corner portions of the top surface of the center magnetic structure.

7. The sound producing unit of claim 1, wherein: The protrusions are in a columnar shape.

8. The sound producing unit of claim 7, wherein: The protrusions are in a cylindrical, elliptical cylindrical or prismatic shape.

9. The sound producing unit of claim 1, wherein: The center magnetic structure comprises a center magnetic steel and a center shunt located on the top surface of the center magnetic steel, the center magnetic steel is connected to the center shunt and the yoke, the protrusions and the center shunt are integrally formed in an integrated structure, or the protrusions and the center shunt are adhesively connected, welded or heat-fused connected.

10. The sound producing unit of claim 9, wherein: The bottom surface of the center shunt has a groove corresponding to the protrusions.

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