Sound production unit

Abstract

The utility model discloses a sounding unit, which comprises a basin stand, a magnetic circuit assembly, a vibrating diaphragm and a waterproof breathable film, the magnetic circuit assembly is fixedly connected with the basin stand, the magnetic circuit assembly comprises a yoke and a central magnetic structure arranged on the yoke, the central magnetic structure is provided with a vertically through communicating hole, and the yoke is provided with a first through hole communicated with the communicating hole; the vibrating diaphragm comprises an inner fixing part, a folding ring part and an outer fixing part which are sequentially connected from inside to outside, the outer fixing part is fixedly connected with the basin stand, the bottom surface of the inner fixing part is fixedly connected with the top surface of the central magnetic structure, and the inner fixing part is provided with a second through hole communicated with the communication hole; the waterproof breathable film is arranged on the yoke and covers the first through hole. The air flow channel is arranged in the central area of the sounding unit, the waterproof breathable film is arranged on the yoke, and the function of forming a small hole in a rear shell of a complete machine to balance air pressure is integrated on the sounding unit body, so that the sounding unit has the functions of ventilation and pressure relief, and the complete machine is not provided with the small hole in the rear shell and cannot be blocked by external dirt.

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] At present, the dynamic sound unit drives the coil through electromagnetic force. The coil drives the diaphragm bonded to it to do reciprocating motion and radiate sound waves outward. The coil in the sound unit itself generates a lot of heat when working. When the sound unit continues to work, the heat generated by it will heat and expand the internal air, making the internal air pressure greater than the external air pressure. If the internal pressure cannot be released, the diaphragm will bulge outward and be unable to vibrate and make sound. The folding ring part of the diaphragm is made of flexible material and is a non-rigid body. Therefore, if an air pressure difference is formed inside and outside the diaphragm, it will affect the shape of the folding ring part and make it difficult for the diaphragm to move to the side with higher air pressure, resulting in failure of its normal sound function.

[0003] At present, the existing technology is to open a small hole on the back shell of a mobile phone, tablet, watch or other device, and stick a breathable film on the small hole. The small hole connects to the internal space of the sound unit to balance the air pressure difference inside and outside the diaphragm. However, the small hole on the back shell and the breathable film are in contact with the external environment. As the use time increases, they are easily blocked by foreign matter and dirt in the external environment, resulting in failure, causing abnormal function of the pronunciation unit and affecting customer use. Utility Model Content

[0004] The technical problem solved by the utility model is to provide a sound-generating unit capable of balancing the air pressure inside and outside the diaphragm.

[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, the magnetic circuit assembly comprises a yoke and a central magnetic structure arranged on the yoke, the central magnetic structure is provided with a connecting hole passing through from top to bottom, and the yoke has a first through hole connected to the connecting hole;

[0008] A diaphragm, the diaphragm comprising an inner fixing portion, a folding ring portion and an outer fixing portion connected in sequence from the inside to the outside, the outer fixing portion being fixedly connected to the basin frame, the bottom surface of the inner fixing portion being fixedly connected to the top surface of the central magnetic structure, and the inner fixing portion having a second through hole connected to the connecting hole;

[0009] A waterproof and breathable membrane is provided on the yoke and covers the first through hole.

[0010] In one embodiment, the waterproof breathable membrane is located in the communicating hole.

[0011] In one embodiment, the waterproof and breathable membrane is located on the bottom surface of the yoke.

[0012] In one embodiment, the waterproof and breathable membranes are respectively provided on the top and bottom surfaces of the yoke, and the waterproof and breathable membrane provided on the top surface of the yoke is located in the connecting hole.

[0013] In one embodiment, the central magnetic structure includes a lower central magnetic steel, a central washer and an upper central magnetic steel sequentially connected from bottom to top, and the connecting hole connects the top surface of the upper central magnetic steel and the bottom surface of the lower central magnetic steel.

[0014] In one embodiment, the magnetic circuit assembly also includes a side magnetic structure, wherein the side magnetic structure is disposed on the yoke, the side magnetic structure is connected to the basin frame, the central magnetic structure is located between at least one group of two side magnetic structures disposed opposite to each other, and a magnetic gap is formed between the central magnetic structure and the side magnetic structure; and also includes a voice coil connected to the diaphragm, and the voice coil is disposed corresponding to the magnetic gap.

[0015] In one embodiment, the side magnet structure includes side magnet steel and side washers, and the side magnet steel is respectively connected to the side washers, the yoke iron and the basin frame.

[0016] In one embodiment, the edge magnet structure is a flange formed by bending a partial area of ​​the yoke.

[0017] In one embodiment, a frame is further included, and the voice coil is indirectly connected to the diaphragm through the frame.

[0018] In one embodiment, the folding ring portion includes an inner folding ring, a transition portion and an outer folding ring which are sequentially connected from inside to outside, the inner folding ring is connected to the inner fixing portion, the outer folding ring is connected to the outer fixing portion, and the frame is connected to the transition portion.

[0019] The beneficial effects of the utility model are:

[0020] An air flow channel is arranged in the central area of ​​the sound unit, and a waterproof breathable membrane is arranged on the yoke iron. The function of balancing the air pressure by opening a small hole on the rear shell of the whole machine is integrated into the sound unit body, so that the sound unit has its own ventilation and pressure relief function, and the whole machine has no small hole on the rear shell, which will not be blocked by external dirt, which is conducive to ensuring that the sound unit can work stably for a long time.

[0021] The inner fixed part of the diaphragm is fixedly connected to the central magnetic structure, which not only improves the structural stability of the sound unit, but also allows the overall volume of the central magnetic structure in the sound unit to be set larger, thereby improving the acoustic performance of the sound unit. 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 It is a cross-sectional view of the sound unit of the second embodiment of the present utility model;

[0026] Figure 4 It is a cross-sectional view of the sound-emitting unit of the third embodiment of the present invention.

[0027] Description of Figure Numbers:

[0028] 1. Basin stand;

[0029] 2. Magnetic circuit assembly; 21. Yoke iron; 211. First through hole; 22. Center magnetic structure; 221. Communication hole; 222. Lower center magnetic steel; 223. Center washer; 224. Upper center magnetic steel; 23. Side magnetic structure; 231. Side magnetic steel; 232. Side washer; 24. Magnetic gap;

[0030] 3. diaphragm; 31. inner fixing portion; 32. folding ring portion; 321. inner folding ring; 322. transition portion; 323. outer folding ring; 33. outer fixing portion;

[0031] 4. Voice coil;

[0032] 5. Waterproof and breathable membrane;

[0033] 6. Skeleton;

[0034] 7. 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 Figure 1 and Figure 2, Embodiment 1 of the utility model is: a sound unit, including a basin frame 1, a magnetic circuit component 2, a diaphragm 3, a voice coil 4 and a waterproof breathable membrane 5, the magnetic circuit component 2 is fixedly connected to the basin frame 1, the magnetic circuit component 2 includes a yoke 21 and a central magnetic structure 22 and a side magnetic structure 23 respectively arranged on the yoke 21, the central magnetic structure 22 is located between at least one group of two side magnetic structures 23 arranged oppositely, a magnetic gap 24 is formed between the central magnetic structure 22 and the side magnetic structure 23, the central magnetic structure 22 is provided with a connecting hole 221 extending from top to bottom, the yoke The iron 21 has a first through hole 211 connected to the connecting hole 221; the voice coil 4 is connected to the diaphragm 3 and is arranged corresponding to the magnetic gap 24, the diaphragm 3 includes an inner fixed part 31, a folded ring part 32 and an outer fixed part 33 connected in sequence from the inside to the outside, the outer fixed part 33 is fixedly connected to the basin frame 1, the bottom surface of the inner fixed part 31 is fixedly connected to the top surface of the central magnetic structure 22, and the inner fixed part 31 has a second through hole connected to the connecting hole 221; the waterproof and breathable membrane 5 is arranged on the yoke 21 and covers the first through hole 211.

[0043] The waterproof and breathable membrane 5 can prevent water in the front cavity of the diaphragm 3 from flowing into the rear cavity, thereby achieving a waterproof effect for the entire machine. It is easy to understand that, at the application end, the magnetic gap 24 is connected to the lower space of the yoke 21, that is, the connecting hole 221 is connected to the magnetic gap 24 through the lower space of the yoke 21.

[0044] In this embodiment, the waterproof breathable membrane 5 is located in the communication hole 221. Specifically, the diameter of the communication hole 221 is larger than the diameter of the first through hole 211, so that the waterproof breathable membrane 5 can be bonded and fixed to the top surface of the yoke 21 and effectively cover the first through hole 211.

[0045] The central magnetic structure 22 includes a lower central magnetic steel 222, a central washer 223 and an upper central magnetic steel 224 which are connected in sequence from bottom to top. The connecting hole 221 connects the top surface of the upper central magnetic steel 224 and the bottom surface of the lower central magnetic steel 222. The bottom surface of the inner fixed portion 31 is fixedly connected to the top surface of the upper central magnetic steel 224.

[0046] The edge magnetic structure 23 is connected to the basin frame 1. Specifically, the edge magnetic structure 23 includes an edge magnetic steel 231 and a edge washer 232. The edge magnetic steel 231 is respectively connected to the edge washer 232, the yoke 21 and the basin frame 1. In other embodiments, the edge magnetic structure 23 is a flange formed by bending a partial area of ​​the yoke 21, which is also acceptable.

[0047] Optionally, the sound-emitting unit further includes a skeleton 6 , and the voice coil 4 is indirectly connected to the diaphragm 3 via the skeleton 6 .

[0048] In this embodiment, the folding ring portion 32 includes an inner folding ring 321, a transition portion 322 and an outer folding ring 323 which are connected in sequence from the inside to the outside, the inner folding ring 321 is connected to the inner fixed portion 31, the outer folding ring 323 is connected to the outer fixed portion 33, and the skeleton 6 is connected to the transition portion 322. In this embodiment, the skeleton 6 and the diaphragm 3 are an integrated structure formed by insert injection molding.

[0049] In order to improve the rolling vibration phenomenon of the voice coil 4, optionally, the sound unit further includes a support assembly 7, the support assembly 7 connects the basin frame 1 and the voice coil 4, and the support assembly 7 includes a centering support plate and / or an auxiliary membrane.

[0050] Embodiment 2

[0051] Please refer to Figure 3 The second embodiment of the present invention is a parallel technical solution of the first embodiment, and is different from the first embodiment in that the waterproof breathable membrane 5 is arranged on the bottom surface of the yoke 21, instead of being arranged on the top surface of the yoke 21 as in the first embodiment.

[0052] Embodiment 3

[0053] Please refer to Figure 4 Embodiment 3 of the present invention is a parallel technical solution of embodiment 1, and is different from embodiment 1 in that a waterproof and breathable membrane 5 is respectively provided on the top and bottom surfaces of the yoke 21, and the waterproof and breathable membrane 5 provided on the top surface of the yoke 21 is located in the connecting hole 221.

[0054] 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, the magnetic circuit assembly comprises a yoke and a central magnetic structure arranged on the yoke, the central magnetic structure is provided with a connecting hole passing through from top to bottom, and the yoke has a first through hole connected to the connecting hole; A diaphragm, the diaphragm comprising an inner fixing portion, a folding ring portion and an outer fixing portion connected in sequence from the inside to the outside, the outer fixing portion being fixedly connected to the basin frame, the bottom surface of the inner fixing portion being fixedly connected to the top surface of the central magnetic structure, and the inner fixing portion having a second through hole connected to the connecting hole; A waterproof and breathable membrane is provided on the yoke and covers the first through hole.

2. The sound generating unit according to claim 1, characterized in that: The waterproof and breathable membrane is located in the communicating hole.

3. The sound generating unit according to claim 1, characterized in that: The waterproof and breathable membrane is located on the bottom surface of the yoke.

4. The sound generating unit according to claim 1, characterized in that: The waterproof and breathable membranes are respectively provided on the top and bottom surfaces of the yoke, and the waterproof and breathable membrane provided on the top surface of the yoke is located in the communicating hole.

5. 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 which are sequentially connected from bottom to top, and the connecting hole connects the top surface of the upper central magnetic steel and the bottom surface of the lower central magnetic steel.

6. The sound generating unit according to claim 1, characterized in that: The magnetic circuit assembly also includes a side magnetic structure, which is arranged on the yoke and connected to the basin frame. The central magnetic structure is located between at least one group of two side magnetic structures arranged opposite to each other, and a magnetic gap is formed between the central magnetic structure and the side magnetic structure; it also includes a voice coil connected to the diaphragm, and the voice coil is arranged corresponding to the magnetic gap.

7. The sound generating unit according to claim 6, characterized in that: The edge magnet structure includes edge magnet steel and edge washer, and the edge magnet steel is respectively connected to the edge washer, the yoke and the basin frame.

8. The sound generating unit according to claim 6, characterized in that: The edge magnet structure is a flange formed by bending a partial area of ​​the yoke.

9. The sound generating unit according to claim 6, characterized in that: It also includes a frame, and the voice coil is indirectly connected to the diaphragm through the frame.

10. The sound generating unit according to claim 9, characterized in that: The folding ring portion includes an inner folding ring, a transition portion and an outer folding ring which are sequentially connected from the inside to the outside, the inner folding ring is connected to the inner fixing portion, the outer folding ring is connected to the outer fixing portion, and the frame is connected to the transition portion.

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