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, and is characterized in that the magnetic circuit assembly is fixedly connected with the basin stand and comprises a yoke and a central magnetic structure arranged on the yoke; 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 vent hole; the magnetic circuit assembly is provided with an airflow channel communicating the vent hole with the lower space of the vibrating diaphragm. The waterproof breathable film is connected to the inner fixing part and covers the vent hole. The air flow channel is arranged on the magnetic circuit assembly of the sounding unit, the waterproof breathable film is arranged on the inner fixing part of the vibrating diaphragm, and the function of forming a small hole in a rear shell of a whole 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 whole machine is not provided with the small hole in the rear shell and cannot be blocked by external dirt; and the sound production unit can stably work for a long time.

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, and the magnetic circuit assembly includes a yoke and a central magnetic structure arranged on the yoke;

[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 is fixedly connected to the basin frame, the bottom surface of the inner fixing portion is fixedly connected to the top surface of the central magnetic structure, and a vent hole is provided on the inner fixing portion;

[0009] The magnetic circuit assembly is provided with an air flow channel connecting the vent hole and the space under the diaphragm;

[0010] A waterproof and breathable membrane is connected to the inner fixing portion and covers the vent hole.

[0011] In one embodiment, the central magnetic structure includes a lower central magnetic steel, a central washer and an upper central magnetic steel connected in sequence from bottom to top, the bottom surface of the lower central magnetic steel is connected to the yoke, and the top surface of the upper central magnetic steel is connected to the internal fixing part.

[0012] In one embodiment, the air flow channel is disposed on the top surface of the upper center magnetic steel, and the air flow channel is connected to the outer wall surface of the center magnetic steel.

[0013] In one embodiment, the air flow channel includes a vertical channel and a transverse channel that are connected. The vertical channel is arranged on the upper center magnetic steel and connected to the air hole, and the transverse channel is arranged on the joint surface between the upper center magnetic steel and the center washer and connected to the outer wall surface of the center magnetic structure.

[0014] In one embodiment, the air flow channel includes a vertical channel and a transverse channel, the top end of the vertical channel is connected to the vent hole, the bottom end of the vertical channel is connected to the transverse channel, the vertical channel passes through the top surface of the upper center magnetic steel and the bottom surface of the center washer, and the transverse channel is arranged at the joint surface of the center washer and the lower center magnetic steel and is connected to the outer wall surface of the center magnetic structure.

[0015] In one embodiment, the air flow channel includes a vertical channel and a transverse channel, the top end of the vertical channel is connected to the vent hole, the bottom end of the vertical channel is connected to the transverse channel, the vertical channel passes through the top surface of the upper center magnet and the bottom surface of the lower center magnet, and the transverse channel is arranged at the joint surface of the yoke and the lower center magnet and is connected to the outer wall surface of the central magnetic structure.

[0016] In one embodiment, the air flow channel is connected to the bottom surface of the yoke.

[0017] In one embodiment, the waterproof breathable membrane is connected to the top surface of the inner fixing portion.

[0018] In one embodiment, the waterproof breathable membrane is connected to the bottom surface of the inner fixing portion, and the waterproof breathable membrane is located in the air flow channel.

[0019] In one embodiment, the waterproof and breathable membranes are respectively provided on the top and bottom surfaces of the inner fixing portion, and the waterproof and breathable membrane provided on the bottom surface of the inner fixing portion is located in the air flow channel.

[0020] The beneficial effects of the utility model are:

[0021] An air flow channel is arranged on the magnetic circuit assembly of the sound unit, and a waterproof breathable membrane is arranged on the inner fixed part of the diaphragm. 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.

[0022] 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

[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 A cross-sectional view of a sound-emitting unit of another structure according to 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 A cross-sectional view of a sound-emitting unit of another structure according to Embodiment 3 of the present utility model;

[0030] Figure 7 It is a cross-sectional view of the sound-emitting unit of the fourth embodiment of the utility model;

[0031] Figure 8 A cross-sectional view of a sound-emitting unit of another structure according to the fourth embodiment of the present utility model;

[0032] Fig. 9 A cross-sectional view of a sound-emitting unit of the first structure of the fifth embodiment of the present utility model;

[0033] Fig.10A cross-sectional view of a sound-emitting unit of the second structure of the fifth embodiment of the present utility model;

[0034] Fig.11 This is a cross-sectional view of a sound-emitting unit of the third structure of the fifth embodiment of the present utility model.

[0035] Description of Figure Numbers:

[0036] 1. Basin stand;

[0037] 2. Magnetic circuit assembly; 21. Yoke iron; 22. Center magnetic structure; 221. Lower center magnetic steel; 222. Center washer; 223. Upper center magnetic steel; 23. Side magnetic structure; 231. Side magnetic steel; 232. Side washer; 24. Magnetic gap; 25. Air flow channel; 251. Vertical channel; 252. Horizontal channel;

[0038] 3. diaphragm; 31. inner fixing part; 311. vent hole; 32. folding ring part; 321. inner folding ring; 322. transition part; 323. outer folding ring; 33. outer fixing part;

[0039] 4. Voice coil;

[0040] 5. Waterproof and breathable membrane;

[0041] 6. Skeleton;

[0042] 7. Support components. DETAILED DESCRIPTION

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] Embodiment 1

[0050] Please refer to Figure 1 and Figure 2 , Embodiment 1 of the present 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 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 folding 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, and the bottom surface of the inner fixed part 31 is fixedly connected to the top surface of the central magnetic structure 22.

[0051] The inner fixed part 31 is provided with a vent hole 311, the magnetic circuit assembly 2 is provided with an air flow channel 25 connecting the vent hole 311 and the lower space of the diaphragm 3, the waterproof breathable membrane 5 is connected to the inner fixed part 31 and covers the vent hole 311, the waterproof 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 whole machine. It should be noted that the lower space of the diaphragm 3 refers to the space on the side of the diaphragm 3 close to the yoke 21, which can not only be the magnetic gap 24, but also a combined space formed by the space on the side of the yoke 21 away from the diaphragm 3 and the magnetic gap 24.

[0052] 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.

[0053] 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 .

[0054] 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.

[0055] 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.

[0056] The central magnetic structure 22 includes a lower central magnetic steel 221, a central washer 222 and an upper central magnetic steel 223 which are connected in sequence from bottom to top. The bottom surface of the lower central magnetic steel 221 is connected to the yoke 21, the top surface of the upper central magnetic steel 223 is connected to the internal fixed portion 31, and the airflow channel 25 connects the top surface of the upper central magnetic steel 223 and the outer wall surface of the central magnetic steel.

[0057] In this embodiment, the waterproof breathable membrane 5 is connected to the top surface of the inner fixing part 31. In other embodiments, when the airflow channel 25 has enough space to accommodate the waterproof breathable membrane 5, the waterproof breathable membrane 5 can also be connected to the bottom surface of the inner fixing part 31 and located in the airflow channel 25. As a further development, when the airflow channel 25 has enough space to accommodate the waterproof breathable membrane 5, the top surface and the bottom surface of the inner fixing part 31 can also be provided with the waterproof breathable membrane 5 respectively, and the waterproof breathable membrane 5 provided on the bottom surface of the inner fixing part 31 is located in the airflow channel 25.

[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 air flow channel 25 includes a vertical channel 251 and a horizontal channel 252 that are connected to each other, the vertical channel 251 is arranged on the upper center magnetic steel 223, the top of the vertical channel 251 is connected to the vent hole 311 on the diaphragm 3, and the horizontal channel 252 is arranged on the joint surface of the upper center magnetic steel 223 and the center washer 222 and connected to the outer wall surface of the center magnetic structure 22. At this time, the arrangement of the horizontal channel 252 has the following three situations:

[0060] 1. The entire area of ​​the transverse channel 252 is located on the upper center magnetic steel 223, and the bottom surface of the transverse channel 252 is connected to the bottom surface of the upper center magnetic steel 223 (such as Figure 3 shown);

[0061] Second, the entire area of ​​the transverse channel 252 is located on the central washer 222, and the top surface of the transverse channel 252 is connected to the top surface of the central washer 222 (such as Figure 4 shown);

[0062] 3. The upper area of ​​the transverse channel 252 is located at the bottom of the upper center magnetic steel 223 , and the lower area is located at the top of the center washer 222 .

[0063] Embodiment 3

[0064] Please refer to Figure 5 and Figure 6, Embodiment 3 of the present utility model is a parallel technical solution of Embodiment 1, and is different from Embodiment 1 in that: the air flow channel 25 includes a vertical channel 251 and a transverse channel 252, the top of the vertical channel 251 is connected to the vent hole 311, and the bottom of the vertical channel 251 is connected to the transverse channel 252, the vertical channel 251 passes through the top surface of the upper center magnetic steel 223 and the bottom surface of the center washer 222, and the transverse channel 252 is provided at the joint surface of the center washer 222 and the lower center magnetic steel 221 and is connected to the outer wall surface of the center magnetic structure 22. At this time, there are three ways to set the transverse channel 252:

[0065] 1. The entire area of ​​the transverse channel 252 is located on the center washer 222, and the bottom surface of the transverse channel 252 is connected to the bottom surface of the center washer 222 (such as Figure 5 shown);

[0066] Second, the entire area of ​​the transverse channel 252 is located on the lower center magnetic steel 221, and the top surface of the transverse channel 252 is connected to the top surface of the lower center magnetic steel 221 (such as Figure 6 shown);

[0067] 3. The upper area of ​​the transverse channel 252 is located at the bottom of the central washer 222 , and the lower area is located at the top of the lower central magnetic steel 221 .

[0068] Embodiment 4

[0069] Please refer to Figure 7 and Figure 8 , Embodiment 4 of the present utility model is a parallel technical solution of Embodiment 1, and is different from Embodiment 1 in that: the air flow channel 25 includes a vertical channel 251 and a transverse channel 252, the top of the vertical channel 251 is connected to the vent hole 311, the bottom of the vertical channel 251 is connected to the transverse channel 252, the vertical channel 251 passes through the top surface of the upper center magnetic steel 223 and the bottom surface of the lower center magnetic steel 221, and the transverse channel 252 is provided at the joint surface of the yoke 21 and the lower center magnetic steel 221 and is connected to the outer wall surface of the central magnetic structure 22. At this time, there are three ways to set the transverse channel 252:

[0070] 1. The entire area of ​​the transverse channel 252 is located on the lower center magnetic steel 221, and the bottom surface of the transverse channel 252 is connected to the bottom surface of the lower center magnetic steel 221 (such as Figure 7 shown);

[0071] Second, the entire area of ​​the transverse channel 252 is located on the yoke 21, and the top surface of the transverse channel 252 is connected to the top surface of the yoke 21 (such as Figure 8 shown);

[0072] 3. The upper area of ​​the transverse channel 252 is located at the bottom of the lower central magnetic steel 221 , and the lower area is located at the top of the yoke 21 .

[0073] Embodiment 5

[0074] Please refer to Figures 9 to 11 The fifth embodiment of the present invention is a parallel technical solution of the first embodiment, and is different from the first embodiment in that: Fig. 9 As shown, the air flow channel 25 on the magnetic circuit component 2 is connected to the bottom surface of the yoke 21.

[0075] At this time, as an alternative, the diameter of the air flow channel 25 is larger than the diameter of the vent hole 311, so that the waterproof breathable membrane 5 can be bonded and fixed to the bottom surface of the inner fixing part 31 and effectively cover the vent hole 311 (such as Fig.10 As a further alternative, the top and bottom surfaces of the inner fixing portion 31 are respectively provided with the waterproof and breathable membrane 5 (as shown in FIG. Fig.11 shown).

[0076] 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 yoke and a central magnetic structure arranged on the yoke; 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 is fixedly connected to the basin frame, the bottom surface of the inner fixing portion is fixedly connected to the top surface of the central magnetic structure, and a vent hole is provided on the inner fixing portion; The magnetic circuit assembly is provided with an air flow channel connecting the vent hole and the space under the diaphragm; A waterproof and breathable membrane is connected to the inner fixing portion and covers the vent hole.

2. 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. The bottom surface of the lower central magnetic steel is connected to the yoke, and the top surface of the upper central magnetic steel is connected to the inner fixing part.

3. The sound generating unit according to claim 2, characterized in that: The air flow channel is arranged on the top surface of the upper center magnetic steel, and the air flow channel is connected to the outer wall surface of the center magnetic steel.

4. The sound generating unit according to claim 2, characterized in that: The air flow channel includes a vertical channel and a transverse channel that are connected. The vertical channel is arranged on the upper center magnetic steel and connected to the air vent, and the transverse channel is arranged on the joint surface between the upper center magnetic steel and the center washer and connected to the outer wall surface of the center magnetic structure.

5. The sound generating unit according to claim 2, characterized in that: The air flow channel includes a vertical channel and a transverse channel. The top end of the vertical channel is connected to the vent hole, and the bottom end of the vertical channel is connected to the transverse channel. The vertical channel passes through the top surface of the upper center magnetic steel and the bottom surface of the center washer. The transverse channel is arranged at the joint surface of the center washer and the lower center magnetic steel and is connected to the outer wall surface of the center magnetic structure.

6. The sound generating unit according to claim 2, characterized in that: The air flow channel includes a vertical channel and a transverse channel. The top end of the vertical channel is connected to the air vent, and the bottom end of the vertical channel is connected to the transverse channel. The vertical channel passes through the top surface of the upper center magnet and the bottom surface of the lower center magnet. The transverse channel is arranged at the joint surface of the yoke and the lower center magnet and is connected to the outer wall surface of the central magnetic structure.

7. The sound generating unit according to claim 1, characterized in that: The air flow channel is in communication with the bottom surface of the yoke.

8. The sound generating unit according to claim 1, characterized in that: The waterproof and breathable membrane is connected to the top surface of the inner fixing part.

9. The sound generating unit according to claim 1, characterized in that: The waterproof breathable membrane is connected to the bottom surface of the inner fixing part, and the waterproof breathable membrane is located in the air flow channel.

10. 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 inner fixing portion, and the waterproof and breathable membrane provided on the bottom surface of the inner fixing portion is located in the air flow channel.

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