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, and is characterized in that 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, and the bottom end of the enclosure wall part is welded with the yoke; the vibrating 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 vibrating diaphragm assembly and is welded with the metal frame. The exposed part of the sounding unit is of a metal structure, the structural strength of the sounding unit is effectively improved, the metal basin frame is welded to the metal front cover and the yoke, the stability of connection between the metal basin frame and the metal front cover and the yoke is guaranteed, and the structural stability of the sounding unit is further improved. The metal frame is reasonable in structural design, so that more space is reserved in the sounding unit for arranging the magnetic circuit assembly, the magnetic field intensity of the sounding unit is improved, and the performance of the sounding unit is improved.

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 weak overall strength, resulting in 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 a 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 assembly, the magnetic circuit assembly includes a yoke, and the bottom end of the surrounding wall part is welded to the yoke;

[0008] A vibration assembly, the vibration assembly includes a diaphragm assembly, and the outer edge of the diaphragm assembly 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 assembly and is welded to the metal chassis.

[0010] In one embodiment, the diaphragm assembly includes a sound film, the sound 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 surrounding wall part and the yoke is arranged in a circle.

[0012] In one embodiment, the welding area between the metal chassis and the metal front cover is arranged in a circle.

[0013] In one embodiment, the magnetic circuit assembly further includes a central magnetic structure, side magnetic steel, and a metal washer. The central magnetic structure includes a central magnetic steel and a central washer. The bottom surface of the central magnetic steel is connected to the yoke, and the top surface of the central magnetic steel is connected to the central washer. The bottom surface of the side magnetic steel is connected to the yoke, and the top surface of the side magnetic steel is connected to the metal washer. The metal washer is integrally in the shape of a rectangular frame, and the metal washer has a contact portion that contacts the bottom surface of the rectangular frame portion.

[0014] In one embodiment, the contact portion is formed by bending a partial area of the metal washer.

[0015] In one embodiment, the surrounding wall portion is welded to the metal washer.

[0016] In one embodiment, the vibration assembly further includes a voice coil connected to the diaphragm assembly, and 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 separator is provided on the metal front cover, and the ventilation separator 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, effectively improving the structural strength of the sound generating unit and reducing the risk of its damage. 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 risk of separation and further improving the structural stability of the sound generating unit. In addition, the metal chassis has a reasonable structural design, enabling more space inside the sound generating unit to set the magnetic circuit assembly, so that a larger volume of magnetic steel can be selected for the magnetic circuit assembly, which is beneficial to improving the magnetic field strength of the sound generating unit and enhancing the performance of the sound generating unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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.

[0021] Figure 1 is an exploded view of the sound generating unit according to Embodiment 1 of the present utility model;

[0022] Figure 2A cross-sectional view of the sound generating unit according to the first embodiment of the present utility model;

[0023] Figure 3 A schematic structural view of the metal basin frame in the sound generating unit according to the first embodiment of the present utility model.

[0024] Explanation of the reference numerals in the accompanying drawings:

[0025] 1. Metal basin frame; 11. Rectangular frame part; 12. Enclosing wall part; 121. Through hole;

[0026] 2. Magnetic circuit assembly; 21. Yoke; 211. Air vent hole; 22. Central magnetic structure; 23. Side magnetic steel; 24. Metal washer; 241. Contact part;

[0027] 3. Vibration assembly; 31. Diaphragm assembly; 32. Voice coil;

[0028] 4. Metal front cover; 41. Vent hole;

[0029] 5. Centering support piece;

[0030] 6. Ventilation isolation piece. Detailed implementation manners

[0031] The realization of the object, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings.

[0032] 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 in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0033] 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 positional relationship and movement conditions between the components in a specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indications will also change accordingly.

[0034] 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" and "second" may explicitly or implicitly include at least one such feature.

[0035] In addition, the meaning of "and / or" as used 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 that satisfies both "A" and "B" simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the premise that those of ordinary skill in the art can implement them. 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 the present utility model.

[0036] In this application, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "coupled", "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.

[0037] Embodiment 1

[0038] Please refer to Figures 1 to 3 , Embodiment 1 of the present utility model is: a sound generating 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 disposed 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;

[0039] 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. The metal washer 24 is integrally rectangular frame-shaped. The bottom end of the surrounding wall portion 12 is welded to the yoke 21, and a magnetic gap is formed between the central magnetic steel and the side magnetic steel 23;

[0040] The vibration assembly 3 includes a diaphragm assembly 31. The outer edge of the diaphragm assembly 31 is 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.

[0041] The vibration assembly 3 also includes a voice coil 32 connected to the diaphragm assembly 31, and the voice coil 32 is arranged corresponding to the magnetic gap. The diaphragm assembly 31 includes a sound diaphragm, and the sound diaphragm includes an inner fixing portion, a folding ring portion, and an outer fixing portion connected in sequence from the inside to the outside, the bottom surface of the outer fixing portion is 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.

[0042] Optionally, the diaphragm assembly 31 further includes a middle sticker, which is connected to the inner fixing portion. In this embodiment, a window is provided in a central area of ​​the inner fixing portion corresponding to the middle sticker, and the middle sticker closes the window.

[0043] To improve the stability of the connection between the metal basin frame 1 and the yoke 21, the welding area between the surrounding wall portion 12 and the yoke 21 is arranged in a circle. Similarly, to improve the stability of the connection between the metal basin frame 1 and the metal front cover 4, the welding area between the metal basin frame 1 and the metal front cover 4 is arranged in a circle.

[0044] In order to reduce the risk of accidental separation of the edge magnetic structure and the yoke 21, in this embodiment, the metal washer 24 has a contact portion 241 that contacts the bottom surface of the rectangular frame portion 11, and the contact portion 241 is formed by bending a part of the metal washer 24. In order to prevent the contact portion 241 from affecting the magnetic conductivity of the metal washer 24, it is preferred that the contact portion 241 is disposed close to the surrounding wall portion 12.

[0045] Optionally, the surrounding wall portion 12 is welded to the metal washer 24, and the welding area between the surrounding wall portion 12 and the metal washer 24 is arranged in a circle. This can improve the stability of the connection between the metal basin frame 1 and the metal washer 24, thereby improving the structural stability of the sound unit to a greater extent and enhancing the anti-fall ability of the sound unit.

[0046] Optionally, the sound unit further includes a centering support piece 5, the surrounding wall portion 12 has a through hole 121 for the centering support piece 5 to pass through, the centering support piece 5 connects the surrounding wall portion 12 and the voice coil 32, specifically, the connection between the centering support piece 5 and the surrounding wall portion 12 is located at the through hole 121, and the centering support piece 5 and the voice coil 32 and the surrounding wall portion 12 can be connected by adhesive. In an actual product, an external soldering pad is provided at one end of the centering support piece 5 exposed to the surrounding wall portion 12, and a conducting circuit for conducting the voice coil 32 is provided on the centering support piece 5, and the conducting circuit is electrically connected to the external soldering pad.

[0047] The metal front cover 4 has a ventilation hole 41, and a breathable isolation member 6 is provided on the metal front cover 4. The breathable isolation member 6 completely covers the ventilation hole 41. The breathable isolation member 6 can be a mesh, a waterproof breathable membrane or other structural members with breathable isolation function.

[0048] An air vent hole 211 is provided on the yoke 21.

[0049] 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 are all included in the patent protection scope of the present invention.

Claims

1. Sound generating unit, characterized in that: including a metal basin frame, the metal basin frame comprising a connected rectangular frame portion and a surrounding wall portion, the surrounding wall portion being disposed along the outer edge of the rectangular frame portion; a magnetic circuit assembly, the magnetic circuit assembly comprising a yoke, the bottom end of the surrounding wall portion being welded to the yoke; a vibration assembly, the vibration assembly comprising a diaphragm assembly, the outer edge of the diaphragm assembly being adhesively bonded to the top surface of the rectangular frame portion; 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 portion, a folding ring portion and an outer fixing portion which are connected in sequence from inside to outside, the bottom surface of the outer fixing portion being adhesively bonded to the top surface of the rectangular frame portion, and the edge of the metal front cover pressing against the top surface of the outer fixing portion.

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

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

5. The sound generating unit according to claim 1, wherein: The magnetic circuit assembly further comprises a central magnetic structure, side magnetic steel and a metal washer, the central magnetic structure comprising a central magnetic steel and a central washer, the bottom surface of the central magnetic steel being connected to the yoke, the top surface of the central magnetic steel being connected to the central washer, the bottom surface of the side magnetic steel being connected to the yoke, the top surface of the side magnetic steel being connected to the metal washer, the metal washer being integrally in a rectangular frame shape, and the metal washer having a contact portion that contacts the bottom surface of the rectangular frame portion.

6. The sound generating unit according to claim 5, characterized in that: The contact portion is formed by bending a partial area of the metal washer.

7. The sound generating unit according to claim 5, wherein: The surrounding wall portion is welded to the metal washer.

8. The sound generating unit according to claim 1, wherein: The vibration assembly further comprises a voice coil connecting the diaphragm assembly, the sounding unit further comprises 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.

9. The sound generating unit according to claim 1, wherein: The metal front cover has air vents, and an air-permeable separator is provided on the metal front cover, and the air-permeable separator completely covers the air vents.

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

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