Sound production module

Abstract

The utility model discloses a sound production module, which comprises a module shell and a sound production monomer, the module shell is provided with a mounting cavity and a rear cavity which are communicated with each other, and the outer surface of the module shell is provided with a window communicated with the mounting cavity; the sound production unit is arranged in the mounting cavity and comprises a yoke, side magnetic steel and central magnetic steel, the side magnetic steel and the central magnetic steel are respectively arranged on the yoke, the yoke is exposed through the window, a magnetic gap is formed between the central magnetic steel and the side magnetic steel, the yoke is provided with a vent groove, and the vent groove is communicated with the central magnetic steel. The outer wall surface of the side magnetic steel is provided with a communication port communicated with the rear cavity, and the ventilation groove is communicated with the communication port and the magnetic gap. The side magnetic steel is provided with the communication port for communicating the rear cavity of the module shell with the vent groove in the yoke, so that air can smoothly flow between the interior of the sound production single body and the rear cavity of the module shell, the condition that the vent groove is blocked by the module shell and / or sealant is effectively improved, and the light and thin sound production module can normally and stably produce sound.

Description

Technical Field

[0001] The utility model relates to the technical field of electroacoustic converters, in particular to a sound module. Background Art

[0002] As an important component, the sound module is widely used in portable electronic devices such as mobile phones, tablets, and game consoles.

[0003] like Figure 1 and Figure 2 As shown, the sound module includes a module housing 1 and a sound unit 2 arranged in the module housing 1. The existing technology mostly adopts the method of setting a ventilation groove 247 on the yoke 241 to connect the magnetic gap 246 of the sound unit 2 and the rear cavity 11 of the module housing 1 to achieve air circulation between the inside of the sound unit 2 and the rear cavity 11 of the module housing 1. However, in order to make the sound module lighter and thinner, the yoke 241 of the sound unit 2 in some sound modules will be exposed to the module housing 1. The design of the exposed yoke 241 sometimes causes the module housing 1 and / or sealant (sealant is used to seal the gap between the module housing 1 and the sound unit 2) to block the ventilation groove 247 on the yoke 241, so that air circulation cannot be achieved between the inside of the sound unit 2 and the rear cavity 11 of the module housing 1. Utility Model Content

[0004] The technical problem solved by the utility model is to provide a sound module with smooth air circulation between the inner cavity of the sound unit and the rear cavity of the module shell while the yoke is exposed.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a sound module, comprising:

[0006] A module housing, wherein the module housing has a mounting cavity and a rear cavity connected to each other, and an outer surface of the module housing is provided with a window connected to the mounting cavity;

[0007] A sound-emitting unit is arranged in the installation cavity, and the sound-emitting unit includes a yoke and side magnets and a center magnet respectively arranged on the yoke. The yoke is exposed through the window, and a magnetic gap is formed between the center magnet and the side magnet. A ventilation groove is provided on the yoke, and the outer wall surface of the side magnet has a connecting port connected to the rear cavity, and the ventilation groove connects the connecting port and the magnetic gap.

[0008] In one embodiment, the ventilation groove is provided on the top surface of the yoke.

[0009] In one embodiment, the edge magnetic steel is in a continuous ring frame shape.

[0010] In one embodiment, the sound unit also includes a basin, a diaphragm assembly, a voice coil and an annular washer. The basin connects the annular washer and the diaphragm assembly, the diaphragm assembly is connected to the voice coil, the voice coil is set corresponding to the magnetic gap, and the annular washer is connected to the side magnet.

[0011] In one embodiment, the central magnetic steel is in a ring frame shape.

[0012] In one embodiment, the sound unit further includes a center washer in a ring frame shape, and the center washer is arranged on the center magnetic steel.

[0013] In one embodiment, the communication port is a notch structure, and the communication port is connected to the bottom surface of the edge magnetic steel and is not connected to the top surface of the edge magnetic steel.

[0014] In one embodiment, there are a plurality of the ventilation grooves, a plurality of the communication openings, and at least two adjacent communication openings are connected to each other.

[0015] In one embodiment, the communication ports located on the same side of the sound unit are connected to each other.

[0016] In one embodiment, the communication port is a notch structure, and the communication port connects the bottom surface and the top surface of the edge magnetic steel.

[0017] The beneficial effect of the present invention is that the edge magnet has a connecting port connecting the rear cavity of the module shell and the ventilation groove on the yoke iron, so that air can flow smoothly between the inside of the sound unit and the rear cavity of the module shell, effectively improving the situation where the module shell and / or sealant blocks the ventilation groove, so that the thin and light sound module can make normal and stable sounds. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0019] Figure 1 It is a cross-sectional view of an existing sound module;

[0020] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0021] Figure 3 This is a cross-sectional view of the sound module of Example 1 of the present utility model;

[0022] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0023] Figure 5 This is a structural diagram of the sound module of the first embodiment of the present utility model;

[0024] Figure 6 This is a structural diagram of the sound module of the second embodiment of the present utility model;

[0025] Figure 7 This is a structural diagram of the sound module of Example 3 of the present utility model.

[0026] Description of Figure Numbers:

[0027] 1. Module housing; 11. Back cavity;

[0028] 2. Sound unit; 21. Basin; 22. Diaphragm assembly; 23. Voice coil; 24. Magnetic circuit assembly; 241. Yoke; 242. Side magnet; 243. Center magnet; 244. Ring washer; 245. Center washer; 246. Magnetic gap; 247. Vent groove; 248. Connecting port. DETAILED DESCRIPTION

[0029] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments.

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] 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 various components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indications will also change accordingly.

[0032] In addition, if the embodiments of the present invention include descriptions of "first," "second," etc., such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one of such features.

[0033] In addition, if the word "and / or" appears throughout the text, it means that three parallel solutions are included. For example, "and / or" includes solutions, or solutions, or solutions that meet all of the requirements simultaneously. In addition, the technical solutions of various embodiments may be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. If the combination of technical solutions is mutually contradictory or cannot be implemented, it shall be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0034] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0035] Example 1

[0036] Please refer to Figures 3 to 5 , Embodiment 1 of the present utility model is: a sound module, comprising a module housing 1 and a sound unit 2, the module housing 1 having a connecting mounting cavity and a rear cavity 11, the outer surface of the module housing 1 is provided with a window communicating with the mounting cavity; the sound unit 2 is arranged in the mounting cavity, the sound unit 2 comprises a basin 21, a diaphragm assembly 22, a voice coil 23 and a magnetic circuit assembly 24, the diaphragm assembly 22 and the magnetic circuit assembly 24 are respectively connected to the basin 21, the voice coil 23 is connected to the diaphragm assembly 22, the magnetic circuit assembly 24 comprises a yoke 241, an edge magnetic steel 242, a center magnetic steel 243, a ring washer 244 and a center washer 245, the yoke 241 Exposed through the window, the side magnets 242 and the center magnet 243 are respectively arranged on the yoke 241, and a magnetic gap 246 for the voice coil 23 to move is formed between the center magnet 243 and the side magnet 242, that is, the voice coil 23 is arranged corresponding to the magnetic gap 246; the annular washer 244 connects the basin 21 and the side magnets 242, the center washer 245 is arranged on the center magnet 243, and a ventilation groove 247 is provided on the yoke 241. The outer wall surface of the side magnet 242 has a connecting port 248 connected to the rear cavity 11, and the ventilation groove 247 connects the connecting port 248 and the magnetic gap 246.

[0037] The vent groove 247 is provided on the top surface of the yoke 241 , which facilitates the processing and forming of the vent groove 247 .

[0038] Preferably, the edge magnetic steel 242 is in the shape of a continuous ring frame. The large volume of the edge magnetic steel 242 can enhance the magnetic field strength of the sound unit 2, thereby improving the performance of the sound module.

[0039] The central magnet 243 and the central washer 245 are respectively in the shape of ring frames. The sound unit 2 also includes a conductive structure, which is arranged on the yoke 241 and located in the hollow area of ​​the central magnet 243. The conductive structure conducts the voice coil 23, and the yoke 241 has an opening for exposing a part of the conductive structure.

[0040] In this embodiment, the conductive structure includes a centering support plate and a conductive member, the conductive member is fixed on the yoke, the conductive member is fixedly connected to the centering support plate and is conductive to each other, a partial area of ​​the conductive member is exposed to the sound unit 2 through the opening, and the centering support plate is conductive to the voice coil 23.

[0041] Optionally, the communication opening 248 is a notch structure, and the communication opening 248 is connected to the bottom surface of the edge magnetic steel 242 and is not connected to the top surface of the edge magnetic steel 242 .

[0042] There are a plurality of ventilation grooves 247 and a plurality of communication openings 248 , and the ventilation grooves 247 are connected to the communication openings 248 in a one-to-one correspondence.

[0043] Example 2

[0044] Please refer to Figure 6 The second embodiment of the present invention is a parallel technical solution of the first embodiment, and the difference from the first embodiment is that: there are multiple ventilation grooves 247, and there are multiple connecting ports 248, and at least two adjacent connecting ports 248 are connected to each other, which can greatly improve the smoothness of air circulation.

[0045] In this embodiment, the communication openings 248 located on the same side of the sound unit 2 are connected to each other.

[0046] Example 3

[0047] Please refer to Figure 7 The third embodiment of the present invention is a parallel technical solution of the first embodiment, and is different from the first embodiment in that the connecting port 248 is a notch structure, and the connecting port 248 connects the bottom surface and the top surface of the edge magnetic steel 242, which can facilitate the processing and forming of the connecting port 248 and at the same time, can greatly improve the smoothness of air circulation.

[0048] The above are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the practical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. Sound module, characterized by: include A module housing, wherein the module housing has a mounting cavity and a rear cavity connected to each other, and an outer surface of the module housing is provided with a window connected to the mounting cavity; A sound-emitting unit is arranged in the installation cavity, and the sound-emitting unit includes a yoke and side magnets and a center magnet respectively arranged on the yoke. The yoke is exposed through the window, and a magnetic gap is formed between the center magnet and the side magnet. A ventilation groove is provided on the yoke, and the outer wall surface of the side magnet has a connecting port connected to the rear cavity, and the ventilation groove connects the connecting port and the magnetic gap.

2. The sound module according to claim 1, characterized in that: The ventilation groove is arranged on the top surface of the yoke.

3. The sound module according to claim 1, wherein: The edge magnetic steel is in a continuous ring frame shape.

4. The sound module according to claim 1, wherein: The sound unit also includes a basin, a diaphragm assembly, a voice coil and an annular washer. The basin connects the annular washer and the diaphragm assembly, the diaphragm assembly is connected to the voice coil, the voice coil is set corresponding to the magnetic gap, and the annular washer is connected to the side magnet.

5. The sound module according to claim 1, characterized in that: The central magnetic steel is in a ring frame shape.

6. The sound module according to claim 5, characterized in that: The sound-emitting unit further includes a center washer in a ring frame shape, and the center washer is arranged on the center magnetic steel.

7. The sound module according to claim 1, characterized in that: The communication port is a notch structure, and the communication port is connected to the bottom surface of the edge magnetic steel, but is not connected to the top surface of the edge magnetic steel.

8. The sound module according to claim 1, characterized in that: There are multiple ventilation grooves, multiple communication ports, and at least two adjacent communication ports are connected to each other.

9. The sound module according to claim 8, characterized in that: The communication ports located on the same side of the sound-emitting unit are connected to each other.

10. The sound module according to claim 1, characterized in that: The connecting port is a notch structure, and the connecting port connects the bottom surface and the top surface of the edge magnetic steel.

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