Miniature loudspeaker

Abstract

The utility model discloses a miniature loudspeaker, comprising a basin stand, a magnetic circuit assembly, a first vibration assembly, a second vibration assembly and a third vibration assembly, the magnetic circuit assembly is connected with the basin stand, the magnetic circuit assembly is provided with two first magnetic gaps and two second magnetic gaps, the first magnetic gaps are linear, and the second magnetic gaps are annular frame-shaped; the first vibration assembly comprises a first diaphragm assembly and two first voice coils, the two first voice coils are vertically arranged and correspond to the two first magnetic gaps, and the first voice coils move in the first magnetic gaps; the second vibration assembly comprises a second diaphragm assembly and two second voice coils, the second voice coils move in the second magnetic gaps, and the two second voice coils correspond to the two second magnetic gaps; the third vibration assembly comprises a third diaphragm assembly and two third voice coils, the two third voice coils are vertically arranged and correspond to the two first magnetic gaps, and the third voice coils move in the first magnetic gaps and are staggered with the first voice coils. The miniature loudspeaker is novel in structure, good in high pitch effect and excellent in acoustic performance.

Description

Technical Field

[0001] This utility model relates to the field of electroacoustic converter technology, and in particular to a miniature loudspeaker. Background Technology

[0002] Miniature speakers are widely used in portable electronic devices such as mobile phones, laptops, and hearing aids. With the rapid development of these portable electronic devices, the requirements for the miniature electroacoustic devices used in them are also increasing.

[0003] Miniature loudspeakers typically use high and low frequency crossover to improve sound quality. Chinese utility model patent with announcement number CN219876100U discloses a miniature loudspeaker that includes a tweeter and two woofers. In actual use, it was found that the magnetic field in the central area of ​​the magnetic circuit component is not fully utilized, and its treble effect is unsatisfactory, leaving room for further improvement. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a miniature speaker with good high-frequency effect.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a miniature loudspeaker, comprising:

[0006] Sink stand;

[0007] A magnetic circuit assembly is connected to the basin frame. The magnetic circuit assembly is provided with two first magnetic gaps and two second magnetic gaps. The two first magnetic gaps are located between the two second magnetic gaps. The first magnetic gaps are linear and the second magnetic gaps are ring-shaped.

[0008] The first vibration component includes a first diaphragm component and two first voice coils. The first diaphragm component connects the first voice coils to the magnetic circuit component. The two first voice coils are vertically arranged and correspond one-to-one with the two first magnetic gaps. The first voice coils move within the first magnetic gaps.

[0009] The second vibration assembly includes a second diaphragm assembly and two second voice coils respectively connected to the second diaphragm assembly. The second diaphragm assembly connects the magnetic circuit assembly and the frame. The second voice coils are movable in the second magnetic gap. The two second voice coils correspond one-to-one with the two second magnetic gaps. The central region of the second vibration assembly has a clearance window for avoiding the first vibration assembly.

[0010] The magnetic circuit assembly has a window connected to the first magnetic gap on the side away from the second diaphragm assembly;

[0011] The third vibration component includes a third diaphragm assembly and two third voice coils. The third diaphragm assembly is located at the window and connects the third voice coils to the magnetic circuit assembly. The two third voice coils are vertically arranged and correspond one-to-one with the two first magnetic gaps. The third voice coils move within the first magnetic gaps and are offset from the first voice coils.

[0012] In one embodiment, the magnetic circuit assembly includes a yoke, a central magnetic structure, and a central magnetic structure and a second side magnetic structure respectively disposed on the yoke. The window is disposed on the yoke, and the central magnetic structure corresponds to the avoidance window and the window. The central magnetic structure includes a first lower central magnet, a first lower side magnet, a magnetic guide plate, a first upper central magnet, a first upper side magnet, an upper magnetic guide bracket, and a lower magnetic guide bracket. The first lower side magnet is fixed to the yoke. The lower magnetic guide bracket is located at the window and is connected to the first lower side magnet. The first lower central magnet is located between at least one set of two oppositely disposed first lower magnets. The bottom surface of the magnetic guide plate connects the first lower central magnet and the first lower side magnet. The first upper central magnet and the first lower side magnet... Each of the upper magnets is fixed to the magnetic guide plate. The first upper center magnet is located between at least one set of two oppositely arranged first upper magnets. The upper magnetic guide bracket is disposed on the first upper magnet. The first magnetic gap passes through the upper magnetic guide bracket, the magnetic guide plate, and the lower magnetic guide bracket. The first diaphragm assembly and the second diaphragm assembly are both connected to the central magnetic structure. The first lower center magnet is connected to the lower magnetic guide bracket and / or the magnetic guide plate. The first upper center magnet is connected to the upper magnetic guide bracket and / or the magnetic guide plate. The central magnetic structure is disposed corresponding to the hollow region of the second voice coil. The second magnetic gap includes a first part formed between the central magnetic structure and the second side magnetic structure and a second part formed between the central magnetic structure and the central magnetic structure.

[0013] In one embodiment, the second side magnetic structure includes a second side magnet and a side washer, the second side magnet connecting the side washer to the yoke, and the side washer connecting to the basin stand.

[0014] In one embodiment, the central magnetic structure includes a second central magnet and a central washer, the second central magnet connecting the central washer to the yoke.

[0015] In one embodiment, the cross-section of the upper magnetic guide bracket is U-shaped; and / or, the cross-section of the lower magnetic guide bracket is U-shaped.

[0016] In one embodiment, the first diaphragm assembly and the second diaphragm assembly are both connected to the upper magnetic guide bracket, and the third diaphragm assembly is connected to the lower magnetic guide bracket.

[0017] In one embodiment, the upper magnetic guide bracket is provided with a first slot communicating with the first magnetic gap, the lower magnetic guide bracket is provided with a second slot communicating with the first magnetic gap, the magnetic guide plate is provided with a through slot communicating with the first magnetic gap, the top side of the first voice coil is located at the first slot, the bottom side of the first voice coil is located at the through slot, the top side of the third voice coil is located at the through slot, and the bottom side of the third voice coil is located at the second slot.

[0018] In one embodiment, the first diaphragm assembly includes a first diaphragm and a first center patch disposed on the first diaphragm.

[0019] In one embodiment, when viewed from above, the first voice coil and the third voice coil have no overlapping area.

[0020] In one embodiment, the second vibration component further includes a frame, through which the second voice coil is connected to the second diaphragm component.

[0021] The beneficial effects of this utility model are as follows:

[0022] This miniature loudspeaker features a novel structure, incorporating not only two bass voice coils (the second voice coil) but also four tweeter voice coils (the first and third voice coils). This effectively enhances the treble performance of the miniature loudspeaker, improves its acoustic performance, and enhances the user experience. The vertical arrangement of the tweeter voice coils not only avoids increasing the size of the miniature loudspeaker but also allows for full utilization of the central area of ​​the central magnetic structure, improving magnetic field utilization.

[0023] This miniature loudspeaker features a back-to-back integrated design of the voice coil woofer and tweeter, saving assembly space.

[0024] This miniature loudspeaker employs a dual-sided sound-emitting architecture, making it well-suited for installation environments that allow for dual-sided vibration. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0026] Figure 1 This is a cross-sectional view of the miniature loudspeaker according to Embodiment 1 of this utility model;

[0027] Figure 2 This is a schematic diagram of a portion of the structure of the miniature speaker according to Embodiment 1 of this utility model;

[0028] Figure 3 This is a schematic diagram of the upper magnetic support in the miniature loudspeaker of Embodiment 1 of this utility model.

[0029] Explanation of icon numbers:

[0030] 1. Pot stand;

[0031] 21. First diaphragm assembly; 22. First voice coil;

[0032] 31. Second diaphragm assembly; 32. Second voice coil; 33. Frame;

[0033] 41. Third diaphragm assembly; 42. Third voice coil;

[0034] 5. Yoke;

[0035] 6. Central magnetic structure; 61. First lower central magnet; 62. First lower side magnet; 63. Magnetic guide plate; 64. First upper central magnet; 65. First upper side magnet; 66. Upper magnetic guide bracket; 661. First slot; 67. Lower magnetic guide bracket;

[0036] 7. Central magnetic structure; 71. Second central magnet; 72. Central washer;

[0037] 8. Second side magnetic structure; 81. Second side magnet; 82. Side washer. Detailed Implementation

[0038] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] It should be noted that if the embodiments of this utility model involve directional indicators such as up, down, left, right, front, back, etc., the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indicators will also change accordingly.

[0041] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," 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 technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0042] Furthermore, if the meaning of "and / or" appears throughout the text, it refers to three parallel solutions. For example, "and / or" includes solution 1, solution 2, and solution 3, which simultaneously satisfy the above conditions. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0043] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0044] Example 1

[0045] Please refer to Figures 1 to 3 One embodiment of this utility model is a miniature speaker that can be used in electronic devices such as mobile phones, tablets, and smartwatches.

[0046] The miniature loudspeaker includes a frame 1, a magnetic circuit assembly, a first vibration assembly, a second vibration assembly, and a third vibration assembly. The magnetic circuit assembly is connected to the frame 1 and has two first magnetic gaps and two second magnetic gaps. The two first magnetic gaps are located between the two second magnetic gaps. The first magnetic gaps are linear, and the second magnetic gaps are annular. The first vibration assembly includes a first diaphragm assembly 21 and two first voice coils 22. The first diaphragm assembly 21 connects the first voice coils 22 to the magnetic circuit assembly. The two first voice coils 22 are vertically arranged and correspond one-to-one with the two first magnetic gaps. The first voice coils 22 are movable within the first magnetic gaps. The second vibration assembly includes a second diaphragm assembly 31 and two second voice coils 32 respectively connected to the second diaphragm assembly 31. The second diaphragm assembly 31 connects the magnetic circuit assembly to the frame 1. The second voice coils 32 are movable within the second magnetic gaps. The two second voice coils 32 correspond one-to-one with the two second magnetic gaps. The central region of the second vibration component has a clearance window for avoiding the first vibration component; the magnetic circuit component has an opening on the side away from the second diaphragm component 31 that connects to the first magnetic gap; the third vibration component includes a third diaphragm component 41 and two third voice coils 42. The third diaphragm component 41 is located at the opening and connects the third voice coils 42 to the magnetic circuit component. The two third voice coils 42 are vertically arranged and correspond one-to-one with the two first magnetic gaps. The third voice coils 42 move within the first magnetic gaps and are offset from the first voice coil 22. That is, when viewed from above, the first voice coil 22 and the third voice coil 42 have no overlapping area within the first magnetic gap. This not only ensures the miniature speaker is thin and light, but also ensures that the first voice coil 22 and the third voice coil 42 do not collide when the first diaphragm component 21 drives the first voice coil 22 to vibrate and / or when the third diaphragm component 41 drives the third voice coil 42 to vibrate. It is easy to understand that the first voice coil 22 and the third voice coil 42 can be connected in parallel, which can further increase the driving force of the tweeter unit of the miniature speaker and improve the treble effect.

[0047] Specifically, the magnetic circuit assembly includes a yoke 5, a central magnetic structure 6, and a central magnetic structure 7 and a second side magnetic structure 8 respectively disposed on the yoke 5. The window is disposed on the yoke 5. The central magnetic structure 6 corresponds to the avoidance window and the window. The central magnetic structure 6 includes a first lower central magnet 61, a first lower side magnet 62, a magnetic guide plate 63, a first upper central magnet 64, a first upper side magnet 65, an upper magnetic guide bracket 66, and a lower magnetic guide bracket 67. The first lower side magnet 62 is fixed on the yoke 5. The lower magnetic guide bracket 67 is located at the window and is connected to the first lower side magnet 62. The first lower central magnet 61 is located between at least one set of two oppositely disposed first lower magnets 62. The bottom surface of the magnetic guide plate 63 connects the first lower central magnet 61 and the first lower side magnet 62. The first upper central magnet 64 and the first lower side magnet 65... Each of the upper magnets 65 is fixed on the magnetic guide plate 63. The first upper center magnet 64 is located between at least one set of two oppositely arranged first upper magnets 65. The upper magnetic guide bracket 66 is disposed on the first upper magnet 65. The first magnetic gap passes through the upper magnetic guide bracket 66, the magnetic guide plate 63, and the lower magnetic guide bracket 67. The first diaphragm assembly 21 and the second diaphragm assembly 31 are both connected to the central magnetic structure 6. The first lower center magnet 61 is connected to the lower magnetic guide bracket 67 and / or the magnetic guide plate 63. The first upper center magnet 64 is connected to the upper magnetic guide bracket 66 and / or the magnetic guide plate 63. The central magnetic structure 7 is disposed corresponding to the hollow area of ​​the second voice coil 32. The second magnetic gap includes a first part formed between the central magnetic structure 7 and the second side magnetic structure 8 and a second part between the central magnetic structure 7 and the central magnetic structure 6.

[0048] In this embodiment, the second side magnetic structure 8 includes a second side magnet 81 and a side washer 82. The second side magnet 81 connects the side washer 82 to the yoke 5, and the side washer 82 connects to the basin stand 1. The central magnetic structure 7 includes a second central magnet 71 and a central washer 72. The second central magnet 71 connects the central washer 72 to the yoke 5.

[0049] The upper magnetic guide bracket 66 has a concave cross-section; and / or, the lower magnetic guide bracket 67 has a concave cross-section. When the upper magnetic guide bracket 66 has a concave cross-section, both the first diaphragm assembly 21 and the second diaphragm assembly 31 are connected to the upper magnetic guide bracket 66. When the lower magnetic guide bracket 67 has a concave cross-section, the third diaphragm assembly 41 is connected to the lower magnetic guide bracket 67.

[0050] In detail, the upper magnetic guide bracket 66 has a first slot 661 connecting to the first magnetic gap, the lower magnetic guide bracket 67 has a second slot connecting to the first magnetic gap, the magnetic guide plate 63 has a through slot connecting to the first magnetic gap, the top side of the first voice coil 22 is located at the first slot 661, the bottom side of the first voice coil 22 is located at the through slot, the top side of the third voice coil 42 is located at the through slot, and the bottom side of the third voice coil 42 is located at the second slot. Optionally, the upper magnetic guide bracket 66 has the same structure as the lower magnetic guide bracket 67, which can reduce the complexity of material preparation and improve the utilization rate of storage resources.

[0051] The first diaphragm assembly 21 includes a first diaphragm and a first center patch disposed on the first diaphragm; the second diaphragm assembly 31 includes a second diaphragm and a second center patch disposed on the second diaphragm; the third diaphragm assembly 41 includes a third diaphragm and a third center patch disposed on the third diaphragm. In other embodiments, the first diaphragm assembly 21 may not have the first center patch, and similarly, the second diaphragm assembly 31 may not have the second center patch, and the third diaphragm assembly 41 may not have the third center patch.

[0052] Optionally, the second vibration assembly further includes a frame 33, through which the second voice coil 32 is connected to the second diaphragm assembly 31.

[0053] The above are merely optional embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the contents of this utility model specification and drawings under the utility model concept, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A micro speaker, characterized by: include Sink stand; A magnetic circuit assembly is connected to the basin frame. The magnetic circuit assembly is provided with two first magnetic gaps and two second magnetic gaps. The two first magnetic gaps are located between the two second magnetic gaps. The first magnetic gaps are linear and the second magnetic gaps are ring-shaped. The first vibration component includes a first diaphragm component and two first voice coils. The first diaphragm component connects the first voice coils to the magnetic circuit component. The two first voice coils are vertically arranged and correspond one-to-one with the two first magnetic gaps. The first voice coils move within the first magnetic gaps. The second vibration assembly includes a second diaphragm assembly and two second voice coils respectively connected to the second diaphragm assembly. The second diaphragm assembly connects the magnetic circuit assembly and the frame. The second voice coils are movable in the second magnetic gap. The two second voice coils correspond one-to-one with the two second magnetic gaps. The central region of the second vibration assembly has a clearance window for avoiding the first vibration assembly. The magnetic circuit assembly has a window connected to the first magnetic gap on the side away from the second diaphragm assembly; The third vibration component includes a third diaphragm assembly and two third voice coils. The third diaphragm assembly is located at the window and connects the third voice coils to the magnetic circuit assembly. The two third voice coils are vertically arranged and correspond one-to-one with the two first magnetic gaps. The third voice coils move within the first magnetic gaps and are offset from the first voice coils.

2. The miniature loudspeaker according to claim 1, characterized in that: The magnetic circuit assembly includes a yoke, a central magnetic structure, and a central magnetic structure and a second side magnetic structure respectively disposed on the yoke. The window is disposed on the yoke. The central magnetic structure corresponds to the avoidance window and the window. The central magnetic structure includes a first lower central magnet, a first lower side magnet, a magnetic guide plate, a first upper central magnet, a first upper side magnet, an upper magnetic guide bracket, and a lower magnetic guide bracket. The first lower side magnet is fixed to the yoke. The lower magnetic guide bracket is located at the window and is connected to the first lower side magnet. The first lower central magnet is located between at least one set of two oppositely disposed first lower magnets. The bottom surface of the magnetic guide plate connects the first lower central magnet and the first lower magnet. The first upper central magnet and the first upper side magnet... All magnets are fixed on the magnetic guide plate. The first upper center magnet is located between at least one set of two oppositely arranged first upper side magnets. The upper magnetic guide bracket is disposed on the first upper side magnet. The first magnetic gap passes through the upper magnetic guide bracket, the magnetic guide plate, and the lower magnetic guide bracket. The first diaphragm assembly and the second diaphragm assembly are both connected to the central magnetic structure. The first lower center magnet is connected to the lower magnetic guide bracket and / or the magnetic guide plate. The first upper center magnet is connected to the upper magnetic guide bracket and / or the magnetic guide plate. The central magnetic structure is disposed corresponding to the hollow region of the second voice coil. The second magnetic gap includes a first part formed between the central magnetic structure and the second side magnetic structure and a second part formed between the central magnetic structure and the central magnetic structure.

3. The microspeaker of claim 2, wherein: The second side magnetic structure includes a second side magnet and a side washer, the second side magnet connecting the side washer to the yoke, and the side washer connecting to the basin stand.

4. The miniature loudspeaker according to claim 2, characterized in that: The central magnetic structure includes a second central magnet and a central washer, wherein the second central magnet connects the central washer to the yoke.

5. The microspeaker of claim 2, wherein: The cross-section of the upper magnetic guide bracket is U-shaped; and / or, the cross-section of the lower magnetic guide bracket is U-shaped.

6. The microspeaker of claim 5, wherein: The first diaphragm assembly and the second diaphragm assembly are both connected to the upper magnetic guide bracket, and the third diaphragm assembly is connected to the lower magnetic guide bracket.

7. The microspeaker of claim 2, wherein: The upper magnetic guide bracket is provided with a first slot that connects to the first magnetic gap, the lower magnetic guide bracket is provided with a second slot that connects to the first magnetic gap, the magnetic guide plate is provided with a through slot that connects to the first magnetic gap, the top side of the first voice coil is located at the first slot, the bottom side of the first voice coil is located at the through slot, the top side of the third voice coil is located at the through slot, and the bottom side of the third voice coil is located at the second slot.

8. The micro speaker of claim 2, wherein: When viewed from above, the first voice coil and the third voice coil have no overlapping area.

9. The miniature loudspeaker according to claim 1, characterized in that: The first diaphragm assembly includes a first diaphragm and a first center patch disposed on the first diaphragm.

10. The miniature loudspeaker according to claim 1, characterized in that: The second vibration assembly also includes a frame, through which the second voice coil is connected to the second diaphragm assembly.

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