High-performance micro flat magnetic horn

Abstract

The utility model discloses a high-performance micro-flat magnetic horn, which comprises a shell and a front cover with a sound outlet hole, the front cover covers the shell, a diaphragm is arranged in a cavity formed by the shell and the front cover, a voice coil is adhered to the bottom of the diaphragm, an outer magnet and an inner magnet arranged in the center of the outer magnet are mounted in the shell, an outer washer is adhered to the top of the outer magnet, and an inner washer is adhered to the bottom of the outer washer. The top of the inner magnet is bonded with the inner washer, a copper ring of the diaphragm is arranged between the shell and the front cover and located on a platform of the shell, the top of the outer magnet is flush with the platform of the shell, the outer washer is arranged in the copper ring, and the copper ring and the outer washer share the same circle center. According to the utility model, the sizes of the diaphragm copper ring, the inner magnet, the outer magnet, the inner washer and the outer washer are optimally designed and reasonably arranged, so that the thickness of the loudspeaker is not increased while the performance of the loudspeaker is improved, and the application range is wider.

Description

Technical Field

[0001] This utility model relates to the field of loudspeaker technology, and more specifically, to a high-performance micro-flat magnetic loudspeaker. Background Technology

[0002] Existing flat-magnet speaker structures consist of an inner and an outer magnet, with the voice coil positioned above them. However, the magnetic field on the outer side of the magnet cannot be effectively utilized. Therefore, increasing the magnet's size limits the improvement in speaker sensitivity. Furthermore, under high power and large amplitude conditions, the voice coil is relatively far from the magnet, requiring at least 0.6mm of vibration space. When the voice coil vibrates upwards, it experiences less magnetic field influence from the magnet, resulting in low magnetic field efficiency and poor speaker performance. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of low magnetic field efficiency and low speaker performance in the existing technology, and to provide a high-performance micro-flat magnetic speaker to solve the above-mentioned shortcomings.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0005] A high-performance micro-flat magnetic loudspeaker includes a housing and a front cover with a sound outlet. The front cover is fitted onto the housing. A diaphragm is disposed within the cavity formed by the housing and the front cover. A voice coil is bonded to the bottom of the diaphragm. An outer magnet and an inner magnet disposed at the center of the outer magnet are installed inside the housing. An outer washer is bonded to the top of the outer magnet, and an inner washer is bonded to the top of the inner magnet. A copper ring of the diaphragm is placed between the housing and the front cover. The copper ring is located on a platform of the housing. The top of the outer magnet is flush with the platform of the housing. The outer washer is placed inside the copper ring. The copper ring and the outer washer are concentric.

[0006] Furthermore, the outer diameter of the outer washer is smaller than the inner diameter of the copper ring, the inner diameter of the outer washer is larger than the outer diameter of the voice coil, the inner diameter of the outer washer is larger than the inner diameter of the outer magnet, the outer diameter of the inner washer is smaller than the inner diameter of the voice coil, and the outer diameter of the inner washer is smaller than the outer diameter of the inner magnet.

[0007] Furthermore, the outer diameter of the outer washer is the same as the outer diameter of the outer magnet, and a sound outlet is opened in the center of the bottom of the outer shell, with the sound outlet extending upward through the inner magnet and the inner washer.

[0008] Furthermore, the inner diameter of the outer magnet is larger than the outer diameter of the inner magnet, and the voice coil is located above the gap between the outer magnet and the inner magnet.

[0009] Furthermore, the thickness of the outer and inner washer fluids is 0.2 mm or more.

[0010] Furthermore, a bottom washer is embedded in the bottom of the outer casing, and a sound outlet is provided in the center of the bottom washer.

[0011] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0012] 1. This utility model sets inner and outer washer above the inner and outer magnets respectively. The copper ring is located on the platform of the outer shell. The top of the outer magnet is flush with the platform of the outer shell. The outer washer is placed inside the copper ring. The copper ring and the outer washer are concentric. By optimizing the design and layout of the diaphragm copper ring, inner and outer magnets and inner and outer washer, the speaker performance is improved without increasing the thickness of the speaker, and the application range is wider.

[0013] 2. The inner and outer washer of this utility model introduces the magnetic field from the side of the magnet into the voice coil, improving the magnetic field efficiency of the speaker and greatly improving the sensitivity, so that the speaker can meet the requirements of large amplitude and high power. Attached Figure Description

[0014] Figure 1 This is a top view assembly diagram of the speaker without a washer at the bottom of this utility model;

[0015] Figure 2 This is an assembly view from below of the speaker without a washer at the bottom of this utility model.

[0016] Figure 3 This is an exploded view of the speaker of this utility model without a washer at the bottom;

[0017] Figure 4 This is a cross-sectional view of the speaker of this utility model without a washer at the bottom;

[0018] Figure 5 This is an assembly diagram of the speaker with a washer at the bottom of this utility model, viewed from below.

[0019] Figure 6 This is a cross-sectional view of the speaker with a washer at the bottom of this utility model;

[0020] Figure 7 The diagram shows the effect of the inner and outer magnets not carrying the inner and outer washer magnetic fields;

[0021] Figure 8 This is a diagram showing the effect of the inner and outer magnets carrying the inner and outer washer magnetic fields.

[0022] In the diagram: 1. Outer shell; 2. Front cover; 3. Diaphragm; 4. Voice coil; 5. Outer magnet; 6. Inner magnet; 7. Outer washer; 8. Inner washer; 9. Bottom washer; 10. PCB board; 11. Copper ring. Detailed Implementation

[0023] 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.

[0024] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0025] Example 1: See Figures 1-4 A high-performance micro-flat magnetic loudspeaker includes a housing 1 and a front cover 2 with five sound holes (one with a larger diameter in the center and four smaller diameter sound holes evenly distributed on the outside). The front cover 2 covers the housing 1. A diaphragm 3 is disposed within the cavity formed by the housing 1 and the front cover 2. A voice coil 4 is bonded to the bottom of the diaphragm 3. The voice coil 4 is connected to a PCB board 10 via wires. An outer magnet 5 and an inner magnet 6 disposed in the center of the outer magnet 5 are installed inside the housing 1. An outer washer 7 is bonded to the top of the outer magnet 5, and an inner washer 7 is bonded to the top of the inner magnet 6. The inner magnet 6 and outer magnet 5 can be round or square (the one shown in this embodiment is round; the square one is not shown in this embodiment). The magnets are made of neodymium iron boron permanent magnets. The inner magnet 6 and outer magnet 5 have opposite magnetic properties and are both magnetic in the Y-axis direction. There can be a gap between the two magnets (shown in this embodiment) or no gap (not shown in this embodiment). A washer is attached to both the inner magnet 6 and the outer magnet 5 to increase the magnetic conductivity. The outer washer 7 and the inner washer 8 form a groove for the vibration space of the voice coil 4.

[0026] Specifically, the voice coil 4 is a flat, ring-shaped coil bonded to the diaphragm 3 and positioned above the gap between the inner and outer magnets. The thickness of the voice coil 4 is between 0.05 and 0.3 mm, and its width is greater than 0.3 mm. The voice coil 4 is made of a highly conductive material such as copper wire, copper-clad aluminum, or aluminum wire. Voice coils 4 can also be bonded to both the top and bottom of the diaphragm 3, creating a dual voice coil structure. This doubles the number of turns in the speaker coil, increasing sensitivity by 3 dB. This embodiment demonstrates a voice coil 4 bonded to the bottom of the diaphragm 3.

[0027] It should be noted that the outer washer 7 and inner washer 8 are made of magnetically conductive materials such as SPCC or SPCE, with a thickness of 0.2mm or more. Their main function is to guide the magnetic field from the sides of the inner magnet 6 and outer magnet 5 to the top of the inner and outer magnets through the outer washer 7 and inner washer 8, increasing the efficiency of the voice coil 4 in the magnetic field. The inner and outer washers are embedded in the diaphragm copper ring and do not occupy any height space.

[0028] The copper ring 11 of the diaphragm 3 is placed between the outer shell 1 and the front cover 2. The copper ring 11 is located on the platform of the outer shell 1. The top of the outer magnet 5 is flush with the platform of the outer shell 1. The outer washer 7 is placed inside the copper ring 11. The copper ring 11 and the outer washer 7 are concentric. The diaphragm 3 is composed of a copper ring, a suspension edge with a folded ring, and a flat dome. The folded ring is made of one or more composite materials such as PU, TPEE, PEEK, and PET. The dome has a flat structure and is made of a material with good rigidity.

[0029] It should be noted that the outer diameter of Waihuasi 7 ( Figure 6 As shown in D1, the inner diameter of the copper ring is smaller than that of the copper ring. Figure 6 As shown in D3), the outer washer 7 is embedded inside the copper ring 11 of the diaphragm, so as not to increase the overall thickness of the speaker. The inner diameter of the outer washer 7 ( Figure 6 (As shown in D2) is larger than the outer diameter of voice coil 4 ( Figure 6 As shown in D6), when the voice coil 4 vibrates at its large amplitude, it will not touch the outer washer 7. The inner diameter of the outer washer 7 ( Figure 6 (As shown in D2) is larger than the inner diameter of the outer magnet 5 ( Figure 6 As shown in D8), this will not affect the magnetic conductivity from the outer magnet 5 to the voice coil 4, and the outer diameter of the Nevada 8 ( Figure 6 (As shown in D4) is smaller than the inner diameter of voice coil 4 ( Figure 6 As shown in D5), when the voice coil 4 vibrates at its large amplitude, it will not touch the Nevada 8. The outer diameter of the Nevada 8 ( Figure 6 (As shown in D4) is smaller than the outer diameter of the inner magnet 6 ( Figure 6 As shown in D7, this will not affect the magnetic conductivity from the inner magnet 6 to the voice coil 4.

[0030] Waihuasi 7 outer diameter ( Figure 6 As shown in D1, the outer diameter of the outer magnet 5 is the same, that is, the outer edge of the outer washer 7 is flush with the outer edge of the outer magnet 5. A sound hole is opened in the center of the bottom of the outer casing 1. The sound hole passes through the inner magnet 6 and the inner washer 8 upwards. This sound hole is used for sound output from the bottom of the speaker.

[0031] The inner diameter of the outer magnet 5 is larger than the outer diameter of the inner magnet 6, and the voice coil 4 is located above the gap between the outer magnet 5 and the inner magnet 6.

[0032] Example 2: See Figures 5-6 Unlike the previous embodiment, the bottom of the outer shell 1 is embedded with a bottom washer 9, and a sound hole is provided in the center of the bottom washer 9. The bottom washer 9 increases the magnetic conductivity of the bottom of the magnet, and the outer diameter of the bottom washer 9 is smaller than the inner diameter of the outer shell 1, that is, it is embedded in the outer shell 1, so as not to increase the overall thickness of the speaker.

[0033] See Figures 7-8 Adding a washer magnetic field to the magnet increases the BL value by 20% compared to the magnet without a washer structure, and improves the speaker sensitivity by more than 3dB.

[0034] In both of the above two embodiments, the components of the high-performance micro-flat magnetic speaker are connected by adhesive bonding.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-performance micro-flat magnetic loudspeaker, comprising a housing (1) and a front cover (2) with a sound outlet, the front cover (2) being fitted onto the housing (1), characterized in that... A diaphragm (3) is disposed in the cavity formed by the outer shell (1) and the front cover (2). A voice coil (4) is bonded to the bottom of the diaphragm (3). An outer magnet (5) and an inner magnet (6) are installed in the outer shell (1). An outer washer (7) is bonded to the top of the outer magnet (5). An inner washer (8) is bonded to the top of the inner magnet (6). A copper ring (11) of the diaphragm (3) is placed between the outer shell (1) and the front cover (2). The copper ring (11) is located on the platform of the outer shell (1). The top of the outer magnet (5) is flush with the platform of the outer shell (1). The outer washer (7) is placed inside the copper ring (11). The copper ring (11) and the outer washer (7) are concentric.

2. The high-performance micro-flat magnetic loudspeaker according to claim 1, characterized in that... The outer diameter of the outer washer (7) is smaller than the inner diameter of the copper ring (11), the inner diameter of the outer washer (7) is larger than the outer diameter of the voice coil (4), the inner diameter of the outer washer (7) is larger than the inner diameter of the outer magnet (5), the outer diameter of the inner washer (8) is smaller than the inner diameter of the voice coil (4), and the outer diameter of the inner washer (8) is smaller than the outer diameter of the inner magnet (6).

3. The high-performance micro-flat magnetic loudspeaker according to claim 2, characterized in that... The outer diameter of the outer washer (7) is the same as that of the outer magnet (5). A sound hole is opened in the center of the bottom of the outer shell (1), and the sound hole passes through the inner magnet (6) and the inner washer (8) upward.

4. The high-performance micro-flat magnetic loudspeaker according to claim 1, characterized in that... The inner diameter of the outer magnet (5) is larger than the outer diameter of the inner magnet (6), and the voice coil (4) is located above the gap between the outer magnet (5) and the inner magnet (6).

5. The high-performance micro-flat magnetic speaker according to claim 1, characterized in that... The thickness of the outer washer (7) and inner washer (8) is 0.2 mm or more.

6. The high-performance micro-flat magnetic loudspeaker according to claim 1, characterized in that... The bottom of the outer shell (1) is embedded with a bottom washer (9), and a sound hole is provided in the center of the bottom washer (9).

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