Sound production unit

Abstract

The utility model discloses a sounding unit, comprising a basin stand, a vibration assembly and a magnetic circuit assembly, the vibration assembly comprises a diaphragm assembly connected with the basin stand; the magnetic circuit assembly comprises a yoke and a central magnetic structure, the central magnetic structure comprises a lower magnetic structure, upper magnetic steel and a magnetic conductive piece, the upper magnetic steel is connected with the lower magnetic structure, the lower magnetic structure comprises lower magnetic steel and a washer, the lower magnetic steel is connected with the yoke and the washer, the magnetic conductive piece is connected with the vibrating diaphragm assembly, and the magnetic conductive piece is connected with the vibrating diaphragm assembly. The magnetic conducting piece comprises a flat plate part, a surrounding wall part and an extension part, the flat plate part is connected to the top surface of the upper magnetic steel, the edge of the flat plate part is bent and extends towards the direction close to the yoke to form the surrounding wall part, and one end, close to the yoke, of the surrounding wall part is bent and extends towards the outer side to form the extension part; and the bottom surface of the extension part is connected with the top surface of the washer. The sound production unit is excellent in performance and can be kept light and thin.

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. As an important component of consumer electronic products such as mobile phones and tablet computers, the sounding unit also has increasingly high requirements in terms of performance, size, etc.

[0003] How to make the thin and light sounding unit achieve higher performance is the persistent pursuit of practitioners. Summary of the Utility Model

[0004] The technical problem solved by the utility model is to provide a high-performance thin and light sounding unit.

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

[0006] A chassis;

[0007] A vibration assembly, the vibration assembly including a diaphragm assembly connected to the chassis;

[0008] A magnetic circuit assembly, the magnetic circuit assembly including a yoke and a central magnetic structure, the central magnetic structure including a lower magnetic structure, an upper magnet and a magnetic conductor, the upper magnet connecting to the lower magnetic structure, the lower magnetic structure including a lower magnet and a washer, the lower magnet connecting the yoke and the washer, the magnetic conductor connecting the diaphragm assembly, the magnetic conductor including a flat plate portion, a surrounding wall portion and an extension portion, the flat plate portion connecting to the top surface of the upper magnet, the edge of the flat plate portion bending and extending towards the direction close to the yoke to form the surrounding wall portion, one end of the surrounding wall portion close to the yoke bending and extending outwards to form the extension portion, and the bottom surface of the extension portion connecting to the top surface of the washer.

[0009] In one embodiment, when looking down at the magnetic circuit assembly, the extension portion does not extend beyond the outer contour line of the washer.

[0010] In one embodiment, the magnetic pole orientation of the upper magnet is opposite to that of the lower magnet.

[0011] In one embodiment, the washer is in a flat plate shape, the bottom surface of the washer connecting to the top surface of the lower magnet, and the top surface of the washer connecting to the bottom surface of the upper magnet.

[0012] In one embodiment, the washer is in an annular frame shape, the bottom of the upper magnet extending into the hollow area of the washer and connecting to the top surface of the lower magnet.

[0013] In one embodiment, the vibration assembly further includes a voice coil. The central magnetic structure is disposed corresponding to the hollow region of the voice coil. The diaphragm assembly has an inner folding ring and an outer folding ring disposed at intervals. The inner folding ring is located within the region enclosed by the outer folding ring. The connection between the voice coil and the diaphragm assembly is located between the inner folding ring and the outer folding ring.

[0014] In one embodiment, the diaphragm assembly includes a first diaphragm, a skeleton, and a second diaphragm connected in sequence from the inside out. The inner folding ring is disposed on the first diaphragm, and the outer folding ring is disposed on the second diaphragm. The first diaphragm further includes a first inner fixing portion and a first outer fixing portion. The first inner fixing portion connects the magnetic conductive member and the inner folding ring. The outer edge of the inner folding ring connects to the first outer fixing portion. Both the first outer fixing portion and the voice coil are connected to the skeleton. The second diaphragm further includes a second inner fixing portion and a second outer fixing portion. The second inner fixing portion connects the skeleton and the outer folding ring, and the second outer fixing portion connects the outer folding ring and the speaker frame.

[0015] In one embodiment, the first inner fixing portion is connected to the top surface of the flat portion.

[0016] In one embodiment, the inner folding ring protrudes away from the yoke, and the outer folding ring protrudes toward the yoke.

[0017] In one embodiment, the magnetic circuit assembly further includes a side magnetic structure. The side magnetic structure connects the speaker frame and the yoke. The central magnetic structure is located between at least one pair of two relatively arranged side magnetic structures.

[0018] The beneficial effects of the present utility model are as follows: The structure of this sound generating unit is novel. The addition of the upper magnet can enhance the magnetic field strength of the sound generating unit. The extension portion of the magnetic conductive member forms a superposition with the washer in the thickness direction of the sound generating unit, effectively improving the magnetic conduction effect, enabling more magnetic induction lines to be directed towards the magnetic gap for the voice coil to move, thereby improving the performance of the sound generating unit. Moreover, since the magnetic conductive member is connected to the diaphragm assembly, there is no need to reserve space above the magnetic conductive member for the diaphragm assembly to move. Therefore, the sound generating unit can maintain a thin and light profile. Description of the Drawings

[0019] 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.

[0020] Figure 1Explosion diagram of the sound - generating unit according to the first embodiment of the present utility model;

[0021] Figure 2 Cross - sectional view of the sound - generating unit according to the first embodiment of the present utility model;

[0022] Figure 3 Cross - sectional view of the sound - generating unit according to the second embodiment of the present utility model.

[0023] Explanation of the reference numerals of the attached drawings:

[0024] 1. Basin frame;

[0025] 2. Diaphragm assembly; 21. First diaphragm; 22. Skeleton; 23. Second diaphragm;

[0026] 3. Voice coil;

[0027] 4. Magnetic circuit assembly; 41. Yoke; 42. Central magnetic structure; 421. Lower magnetic structure; 4211. Lower magnet; 4212. Washer; 422. Upper magnet; 423. Magnetic conductor; 4231. Flat part; 4232. Enclosing wall part; 4233. Extension part; 43. Edge magnetic structure. Specific implementation manners

[0028] The realization of the purpose, functional characteristics and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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 solution A, or solution B, or the solution that satisfies both A and B simultaneously. Additionally, 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 is unachievable, 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.

[0033] In this application, unless otherwise clearly specified and defined, terms such as "installed", "connected", "linked", "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.

[0034] Embodiment 1

[0035] Please refer to Figure 1 and Figure 2 , Embodiment 1 of this utility model is as follows: A sound generating unit, comprising a chassis 1, a vibration assembly, and a magnetic circuit assembly 4. The vibration assembly includes a diaphragm assembly 2 and a voice coil 3. The diaphragm assembly 2 connects the voice coil 3 and the chassis 1. The magnetic circuit assembly 4 includes a yoke 41, a central magnetic structure 42, and a side magnetic structure 43. The side magnetic structure 43 connects the chassis 1 and the yoke 41. The central magnetic structure 42 is located between at least one pair of relatively arranged side magnetic structures 43. A magnetic gap for the voice coil 3 to move is formed between the side magnetic structure 43 and the central magnetic structure 42. The central magnetic structure 42 is arranged corresponding to the hollow area of the voice coil 3. The central magnetic structure 42 includes a lower magnetic structure 421, an upper magnet 422, and a magnetic conductive member 423. The upper magnet 422 connects the lower magnetic structure 421. The lower magnetic structure 421 includes a lower magnet 4211 and a washer 4212. The lower magnet 4211 connects the yoke 41 and the washer 4212. The magnetic conductive member 423 connects the diaphragm assembly 2. The magnetic conductive member 423 includes a flat plate portion 4231, a surrounding wall portion 4232, and an extension portion 4233. The flat plate portion 4231 is connected to the top surface of the upper magnet 422. The edge of the flat plate portion 4231 bends and extends towards the direction close to the yoke 41 to form the surrounding wall portion 4232. One end of the surrounding wall portion 4232 close to the yoke 41 bends and extends outwards to form the extension portion 4233. The bottom surface of the extension portion 4233 is connected to the top surface of the washer 4212. The upper magnet 422 is located within the hollow area of the magnetic conductive member 423.

[0036] When looking down at the magnetic circuit component 4, the extension part 4233 does not extend beyond the outer contour line of the washer 4212. That is to say, the end face of the extension part 4233 away from the enclosure wall part 4232 is recessed relative to the outer peripheral wall of the washer 4212, or the end face of the extension part 4233 away from the enclosure wall part 4232 is flush with the outer peripheral wall of the washer 4212.

[0037] The magnetic pole orientation of the upper magnet 422 is opposite to that of the lower magnet 4211. When the bottom of the upper magnet 422 is the N pole, the top of the lower magnet 4211 is also the N pole. When the bottom of the upper magnet 422 is the S pole, the top of the lower magnet 4211 is also the S pole. This can allow more magnetic induction lines to converge on the extension part 4233 and the washer 4212.

[0038] In this embodiment, the washer 4212 is in a flat plate shape. The bottom surface of the washer 4212 is connected to the top surface of the lower magnet 4211, and the top surface of the washer 4212 is connected to the bottom surface of the upper magnet 422.

[0039] Specifically, the diaphragm assembly 2 has an inner folding ring and an outer folding ring arranged at intervals. The inner folding ring is located within the area enclosed by the outer folding ring. The connection part of the voice coil 3 and the diaphragm assembly 2 is located between the inner folding ring and the outer folding ring. Optionally, the inner folding ring protrudes away from the yoke 41, and the outer folding ring protrudes towards the yoke 41.

[0040] In this embodiment, the diaphragm assembly 2 includes a first diaphragm 21, a skeleton 22, and a second diaphragm 23 connected in sequence from the inside out. The inner folding ring is arranged on the first diaphragm 21, and the outer folding ring is arranged on the second diaphragm 23. The first diaphragm 21 further includes a first inner fixing part and a first outer fixing part. The first inner fixing part connects the magnetic conductive part 423 and the inner folding ring. The outer edge of the inner folding ring is connected to the first outer fixing part. Both the first outer fixing part and the voice coil 3 are connected to the skeleton 22. The second diaphragm 23 further includes a second inner fixing part and a second outer fixing part. The second inner fixing part connects the skeleton 22 and the outer folding ring, and the second outer fixing part connects the outer folding ring and the chassis 1. Specifically, the first inner fixing part is connected to the top surface of the flat plate part 4231.

[0041] Embodiment Two

[0042] Please refer to Figure 3, Embodiment 2 of the present utility model is an alternative technical solution to Embodiment 1, and the difference from Embodiment 1 is that the washer 4212 is in a ring frame shape, and the bottom of the upper magnet 422 extends into the hollow area of the washer 4212 and is connected to the top surface of the lower magnet 4211. In this way, the magnetic field intensity of the sound generating unit is increased on the premise of slightly affecting or even not affecting the magnetic conduction effect, which is beneficial to further improving the performance of the sound generating unit.

[0043] The above are only alternative embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made by using the content of the specification and drawings of the present utility model under the inventive concept of the present utility model, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.

Claims

1. Sound generating unit, characterized in that: Comprising A chassis; A vibration assembly, the vibration assembly comprising a diaphragm assembly connected to the chassis; A magnetic circuit assembly, the magnetic circuit assembly comprising a yoke and a central magnetic structure, the central magnetic structure comprising a lower magnetic structure, an upper magnet and a magnetic conductor, the upper magnet being connected to the lower magnetic structure, the lower magnetic structure comprising a lower magnet and a washer, the lower magnet being connected to the yoke and the washer, the magnetic conductor being connected to the diaphragm assembly, the magnetic conductor comprising a flat portion, a surrounding wall portion and an extension portion, the flat portion being connected to the top surface of the upper magnet, the edge of the flat portion being bent and extended towards the yoke to form the surrounding wall portion, one end of the surrounding wall portion close to the yoke being bent and extended outwards to form the extension portion, the bottom surface of the extension portion being connected to the top surface of the washer.

2. The sound generating unit according to claim 1, wherein: When looking down at the magnetic circuit assembly, the extension portion does not extend beyond the outer contour line of the washer.

3. The sound generating unit according to claim 1, wherein: The magnetic pole orientation of the upper magnet is opposite to that of the lower magnet.

4. The sound generating unit according to claim 1, wherein: The washer is in a flat plate shape, the bottom surface of the washer is connected to the top surface of the lower magnet, and the top surface of the washer is connected to the bottom surface of the upper magnet.

5. The sound generating unit according to claim 1, characterized in that: The washer is in an annular frame shape, and the bottom of the upper magnet extends into the hollow region of the washer and is connected to the top surface of the lower magnet.

6. The sound generating unit according to claim 1, wherein: The vibration assembly further comprises a voice coil, the central magnetic structure is arranged corresponding to the hollow region of the voice coil, the diaphragm assembly has an inner folding ring and an outer folding ring arranged at intervals, the inner folding ring is located in the region enclosed by the outer folding ring, and the connection part of the voice coil and the diaphragm assembly is located between the inner folding ring and the outer folding ring.

7. The sound generating unit according to claim 6, characterized in that: The diaphragm assembly comprises a first diaphragm, a skeleton and a second diaphragm connected in sequence from inside to outside, the inner folding ring is arranged on the first diaphragm, the outer folding ring is arranged on the second diaphragm, the first diaphragm further comprises a first inner fixing part and a first outer fixing part, the first inner fixing part connects the magnetic conductor and the inner folding ring, the outer edge of the inner folding ring is connected to the first outer fixing part, both the first outer fixing part and the voice coil are connected to the skeleton, the second diaphragm further comprises a second inner fixing part and a second outer fixing part, the second inner fixing part connects the skeleton and the outer folding ring, and the second outer fixing part connects the outer folding ring and the chassis.

8. The sound generating unit according to claim 7, wherein: The first inner fixing part is connected to the top surface of the flat portion.

9. The sound generating unit according to claim 6, wherein: The inner folding ring protrudes away from the yoke, and the outer folding ring protrudes towards the yoke.

10. The sound generating unit according to claim 1, wherein: The magnetic circuit assembly further comprises a side magnetic structure, the side magnetic structure connects the chassis and the yoke, and the central magnetic structure is located between at least one set of two relatively arranged side magnetic structures.

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