Sound production unit

Abstract

The utility model discloses a sounding unit, which comprises a metal basin stand, a magnetic circuit assembly, a vibration assembly and a metal front cover, the metal basin stand comprises a rectangular frame part and a surrounding wall part which are connected, and the surrounding wall part is arranged along the outer edge of the rectangular frame part; the magnetic circuit assembly comprises a yoke, side magnetic steel and a metal washer, the bottom surface of the side magnetic steel is connected with the yoke, the top surface of the side magnetic steel is connected with the metal washer, the edge of the metal washer is provided with an L-shaped extension part, the extension part comprises a vertical section and a horizontal section which are connected, the yoke is provided with a positioning groove used for positioning the horizontal section, and the vertical section and the horizontal section are connected through the positioning groove. The bottom end of the enclosure wall part is respectively welded with the yoke and the horizontal section; the vibration assembly comprises a vibrating diaphragm assembly, and the outer edge of the vibrating diaphragm assembly is adhered to the top surface of the rectangular frame part; the metal front cover abuts against the outer edge of the diaphragm assembly and is welded with the metal frame. The sounding unit is stable in structure, high in anti-falling capability and convenient to process and manufacture.

Description

Technical Field

[0001] The utility model relates to the technical field of electroacoustic transducers, and particularly to a sounding unit. Background Art

[0002] As a common electroacoustic transducer for converting electrical energy into sound energy, the sounding unit plays an indispensable role in the sound reproduction system.

[0003] With the thinning of consumer electronic products such as mobile phones and tablet computers, the sounding unit is also forced to develop in the direction of thinning. However, the thin and light sounding unit is prone to the situation of overall weak strength, resulting in easy damage to the sounding unit when the electronic product drops during normal use, leading to poor sound reproduction. Summary of the Utility Model

[0004] The technical problem solved by the utility model is to provide a sounding unit with stable structure.

[0005] To solve the above technical problem, the technical solution adopted by the utility model is: a sounding unit, comprising:

[0006] A metal chassis, the metal chassis includes a connected rectangular frame part and a surrounding wall part, and the surrounding wall part is arranged along the outer edge of the rectangular frame part;

[0007] A magnetic circuit component, the magnetic circuit component includes a yoke, a side magnet and a metal washer, the bottom surface of the side magnet is connected to the yoke, the top surface of the side magnet is connected to the metal washer, the edge of the metal washer has an L-shaped extension part, the extension part includes a connected vertical section and a horizontal section, the yoke has a positioning groove for positioning the horizontal section, and the bottom ends of the surrounding wall parts are respectively welded to the yoke and the horizontal section;

[0008] A vibration component, the vibration component includes a diaphragm component, and the outer edge of the diaphragm component is bonded to the top surface of the rectangular frame part;

[0009] A metal front cover, the metal front cover presses against the outer edge of the diaphragm component and is welded to the metal chassis.

[0010] In one embodiment, the diaphragm component includes a sounding film, the sounding film includes an inner fixing part, a folding ring part and an outer fixing part connected in sequence from inside to outside, the bottom surface of the outer fixing part is bonded to the top surface of the rectangular frame part, and the edge of the metal front cover presses against the top surface of the outer fixing part.

[0011] In one embodiment, the welding area between the metal chassis and the metal front cover is arranged in a circle.

[0012] In one embodiment, the welding area between the surrounding wall part and the yoke and the horizontal section is arranged in a circle.

[0013] In one embodiment, the top surface of the horizontal section is coplanar with the top surface of the yoke, and the bottom surface of the horizontal section is coplanar with the bottom surface of the yoke.

[0014] In one embodiment, the bottom end of the surrounding wall portion is supported on the yoke and the horizontal section.

[0015] In one embodiment, the extension portion is formed by bending a partial area of the metal washer.

[0016] In one embodiment, the vibration assembly further includes a voice coil connecting the diaphragm assembly, the sound generating unit further includes a centering washer, the surrounding wall portion has a through hole for the centering washer to pass through, and the centering washer connects the surrounding wall portion and the voice coil.

[0017] In one embodiment, the metal front cover has ventilation holes, and a ventilation isolation member is provided on the metal front cover, and the ventilation isolation member completely covers the ventilation holes.

[0018] In one embodiment, the yoke is provided with air vent holes.

[0019] The beneficial effects of the present utility model are as follows: The exposed parts of the present sound generating unit are all metal structures, which effectively improve the structural strength of the sound generating unit and reduce the risk of damage to it. Moreover, the metal chassis is welded to the metal front cover and the yoke respectively, which can effectively ensure the stability of the connection between the metal chassis and the metal front cover and the yoke, thereby reducing the separation risk and further improving the structural stability of the sound generating unit.

[0020] The cooperation among the metal chassis, the extension portion and the positioning groove on the yoke can not only realize the positioning and assembly of the sound generating unit, but also enable the metal washer to be accurately positioned and welded to the metal chassis, which simplifies the processing and manufacturing process of the sound generating unit while improving the structural stability of the sound generating unit, facilitating the improvement of production efficiency and the reduction of production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0022] Figure 1 is an exploded view of the sound generating unit according to Embodiment 1 of the present utility model;

[0023] Figure 2 is a cross-sectional view of the sound generating unit according to Embodiment 1 of the present utility model;

[0024] Figure 3 This is the bottom view of the sound - generating unit of the first embodiment of the present utility model.

[0025] Explanation of the reference numerals in the drawings:

[0026] 1. Metal basin frame; 11. Rectangular frame part; 12. Enclosing wall part; 121. Through - hole

[0027] 2. Magnetic circuit assembly; 21. Yoke; 211. Positioning groove; 212. Air vent hole; 22. Central magnetic structure; 23. Side magnetic steel; 24. Metal washer; 241. Extension part; 2411. Vertical section; 2412. Horizontal section

[0028] 3. Vibration assembly; 31. Diaphragm assembly; 32. Voice coil

[0029] 4. Metal front cover; 41. Vent hole

[0030] 5. Centering support piece

[0031] 6. Ventilation isolation part Detailed implementation manners

[0032] The realization of the purpose, functional characteristics and advantages of the present utility model will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

[0033] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0034] It should be noted that if there are directional indications such as up, down, left, right, front, back... in the embodiments of the present utility model, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture as shown in the drawings. If the specific posture changes, the directional indications will also change accordingly.

[0035] In addition, if there are descriptions such as "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one such feature.

[0036] In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions. Taking "and / or" as an example, it includes the solution of "A", or the solution of "B", or the solution where both are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions 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.

[0037] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] Embodiment 1

[0039] Please refer to Figures 1 to 3 , Embodiment 1 of this utility model is: a sounding unit, including a metal chassis 1, a magnetic circuit assembly 2, a vibration assembly 3 and a metal front cover 4. The metal chassis 1 includes a connected rectangular frame portion 11 and a surrounding wall portion 12. The surrounding wall portion 12 is arranged along the outer edge of the rectangular frame portion 11. Preferably, the rectangular frame portion 11 and the surrounding wall portion 12 are an integrally formed one-piece structure processed integrally;

[0040] The magnetic circuit assembly 2 includes a yoke 21, a central magnetic structure 22, side magnetic steel 23 and a metal washer 24. The central magnetic structure 22 includes a central magnetic steel and a central washer. The bottom surface of the central magnetic steel is connected to the yoke 21, and the top surface of the central magnetic steel is connected to the central washer. The bottom surface of the side magnetic steel 23 is connected to the yoke 21, and the top surface of the side magnetic steel 23 is connected to the metal washer 24. A magnetic gap is formed between the central magnetic steel and the side magnetic steel 23. The metal washer 24 is integrally rectangular frame-shaped, and the edge of the metal washer 24 has an L-shaped extension portion 241. Optionally, the extension portion 241 is formed by bending a part of the area of the metal washer 24. The extension portion 241 includes a connected vertical section 2411 and a horizontal section 2412. The top of the vertical section 2411 is connected to the edge of the metal washer 24 and is located outside the side magnetic steel 23. The yoke 21 has a positioning groove 211 for positioning the horizontal section 2412. The bottom ends of the surrounding wall portion 12 are respectively welded to the yoke 21 and the horizontal section 2412;

[0041] The vibration assembly 3 includes a diaphragm assembly 31, and the outer edge of the diaphragm assembly 31 is adhesively bonded to the top surface of the rectangular frame portion 11; the metal front cover 4 presses against the outer edge of the diaphragm assembly 31 and is welded to the metal chassis 1.

[0042] In this embodiment, the vertical section 2411 is located outside the side magnet 23. In other embodiments, a notch structure for accommodating the vertical portion may be provided outside the side magnet 23, which can increase the overall volume of the side magnet 23, thereby improving the magnetic field strength of the sound generating unit and enhancing the performance of the sound generating unit.

[0043] The vibration assembly 3 further includes a voice coil 32 connected to the diaphragm assembly 31, and the voice coil 32 is disposed corresponding to the magnetic gap. The diaphragm assembly 31 includes a diaphragm, and the diaphragm includes an inner fixing portion, a surround portion, and an outer fixing portion that are connected in sequence from the inside to the outside. The bottom surface of the outer fixing portion is adhesively bonded to the top surface of the rectangular frame portion 11, and the edge of the metal front cover 4 presses against the top surface of the outer fixing portion.

[0044] Optionally, the diaphragm assembly 31 further includes a middle patch, and the middle patch is connected to the inner fixing portion. In this embodiment, the inner fixing portion is provided with a window corresponding to the central region of the middle patch, and the middle patch closes the window.

[0045] To improve the connection stability between the metal chassis 1, the yoke 21, and the metal washer 24, the welding area between the surrounding wall portion 12, the yoke 21, and the horizontal section 2412 is arranged in a circle. During actual welding, the welding robot can use a welding torch to weld a circle along the peripheral wall of the sound generating unit to simultaneously complete the welding work of the metal chassis 1, the yoke 21, and the metal washer 24, and the operation process is very simple. Similarly, to improve the connection stability between the metal chassis 1 and the metal front cover 4, the welding area between the metal chassis 1 and the metal front cover 4 is arranged in a circle.

[0046] Optionally, the vertical section 2411 is perpendicularly connected to the horizontal section 2412. Preferably, the top surface of the horizontal section 2412 is coplanar with the top surface of the yoke 21, and the bottom surface of the horizontal section 2412 is coplanar with the bottom surface of the yoke 21. In this embodiment, the bottom end of the surrounding wall portion 12 is supported on the yoke 21 and the horizontal section 2412, which can improve the positioning accuracy of the metal chassis 1, the metal washer 24, and the yoke 21, and enhance the consistency of the production of the sound generating unit.

[0047] Optionally, the sound generating unit further includes a centering washer 5. The surrounding wall portion 12 has a through hole 121 for the centering washer 5 to pass through. The centering washer 5 connects the surrounding wall portion 12 and the voice coil 32. Specifically, the connection portion of the centering washer 5 and the surrounding wall portion 12 is located at the through hole 121. The centering washer 5 can be adhesively connected to the voice coil 32 and the surrounding wall portion 12. In an actual product, an external bonding pad is provided at one end of the centering washer 5 exposed outside the surrounding wall portion 12. A conduction line for conducting the voice coil 32 is provided on the centering washer 5, and the conduction line is electrically connected to the external bonding pad.

[0048] The metal front cover 4 has ventilation holes 41. A ventilation isolation member 6 is provided on the metal front cover 4. The ventilation isolation member 6 completely covers the ventilation holes 41. The ventilation isolation member 6 can be a mesh cloth, a waterproof breathable film, or other structural members with ventilation isolation functions.

[0049] An air vent hole 212 is provided on the yoke 21.

[0050] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention under the inventive concept of the present invention, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. Sound generating unit, characterized in that: Comprising A metal basin frame, the metal basin frame comprising a connected rectangular frame part and a surrounding wall part, the surrounding wall part being arranged along the outer edge of the rectangular frame part; A magnetic circuit assembly, the magnetic circuit assembly comprising a yoke, side magnets and a metal washer, the bottom surface of the side magnets being connected to the yoke, the top surface of the side magnets being connected to the metal washer, the edge of the metal washer having an L-shaped extension part, the extension part comprising a connected vertical section and a horizontal section, the yoke having a positioning groove for positioning the horizontal section, and the bottom end of the surrounding wall part being welded to the yoke and the horizontal section respectively; A vibration assembly, the vibration assembly comprising a diaphragm assembly, the outer edge of the diaphragm assembly being bonded to the top surface of the rectangular frame part; A metal front cover, the metal front cover pressing against the outer edge of the diaphragm assembly and being welded to the metal basin frame.

2. The sound generating unit according to claim 1, wherein: The diaphragm assembly comprises a sounding film, the sounding film comprising an inner fixing part, a folding ring part and an outer fixing part connected in sequence from the inside outwards, the bottom surface of the outer fixing part being bonded to the top surface of the rectangular frame part, and the edge of the metal front cover pressing against the top surface of the outer fixing part.

3. The sound generating unit according to claim 1, wherein: The welding area between the metal basin frame and the metal front cover is arranged in a circle.

4. The sound generating unit according to claim 1, wherein: The welding area between the surrounding wall part and the yoke and the horizontal section is arranged in a circle.

5. The sound generating unit according to claim 1, wherein: The top surface of the horizontal section is coplanar with the top surface of the yoke, and the bottom surface of the horizontal section is coplanar with the bottom surface of the yoke.

6. The sound generating unit according to claim 5, wherein: The bottom end of the surrounding wall part is supported on the yoke and the horizontal section.

7. The sound generating unit according to claim 1, wherein: The extension part is formed by bending a partial area of the metal washer.

8. The sound generating unit according to claim 1, wherein: The vibration assembly further comprises a voice coil connected to the diaphragm assembly, the sounding unit further comprises a centering support piece, the surrounding wall part having a through hole for the centering support piece to pass through, and the centering support piece connecting the surrounding wall part and the voice coil.

9. The sound generating unit according to claim 1, wherein: The metal front cover has air vent holes, and an air vent isolation piece is provided on the metal front cover, the air vent isolation piece completely covering the air vent holes.

10. The sound generating unit according to claim 1, wherein: The yoke is provided with air vent holes.

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