Flat horn with washer

Abstract

The utility model discloses a flat horn with a washer, which belongs to the technical field of flat horns and comprises a shell, the washer is embedded in the bottom of the shell, an outer magnet and an inner magnet are adhered to the upper surface of the washer, and magnetic fields at the bottoms of the outer magnet and the inner magnet are guided to the upper portions of the outer magnet and the inner magnet through the washer. A voice coil bonded on the diaphragm is arranged above the outer magnet and the inner magnet, the side face of the outer magnet and the side face of the washer are provided with plane portions which are flush with each other, and the plane portions are vertically provided with PCBs embedded in side face grooves of the shell. According to the utility model, the outer magnet and the washer are respectively provided with a plane part which is used for vertically installing the PCB and embedding the PCB on the side surface of the shell, and the PCB is arranged on the side edge and is combined with the design of embedding the single magnetic circuit and the washer, so that the overall thickness and the outer diameter of the flat horn can be reduced, and the flat horn is thinner and smaller in size; and the use requirements can be well met.

Description

Technical Field

[0001] This utility model relates to the field of flat panel loudspeaker technology, specifically a flat panel loudspeaker with a washer. Background Technology

[0002] A flat-panel loudspeaker is a type of loudspeaker with a flat-panel design. Its working principle and structure differ from traditional cone loudspeakers. Flat-panel loudspeakers typically employ a flat design and can be driven by electromagnetic or resonant methods. However, existing flat-panel loudspeakers suffer from low magnetic permeability and sensitivity, and are also bulky, failing to adequately meet usage requirements. Utility Model Content

[0003] The purpose of this invention is to provide a flat panel speaker with a washer embedded in the bottom, which can improve the magnetic conductivity at the bottom of the magnetic circuit and enhance the sensitivity of the flat panel speaker. Furthermore, the PCB is located on the side, which can reduce the overall thickness and outer diameter of the flat panel speaker, making it thinner and smaller, thus better meeting the usage requirements and solving the problems in the prior art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A flat panel speaker with a washer includes a housing, with a washer embedded in the bottom of the housing. An outer magnet and an inner magnet are attached to the upper surface of the washer. The magnetic field at the bottom of the outer magnet and the inner magnet is guided above the outer magnet and the inner magnet through the washer. A voice coil is disposed above the outer magnet and the inner magnet and is attached to a diaphragm. The diaphragm is embedded in the upper end of the housing. The sides of the outer magnet and the sides of the washer are provided with flush flat portions. A PCB embedded in a groove on the side of the housing is vertically mounted on the flat portion.

[0006] Preferably, the thickness of the washer is 0.1mm-0.4mm, and the washer is made of SPCC or SPCE magnetic conductive material.

[0007] Preferably, the outer magnet is located around the inner magnet, and both the outer magnet and the inner magnet are neodymium iron boron permanent magnets.

[0008] Preferably, the outer magnet and the inner magnet have opposite magnetic properties, and both the outer magnet and the inner magnet are magnetic in the Y-axis direction.

[0009] Preferably, the voice coil is a flat annular shape, with a thickness of 0.05mm-0.3mm and a width greater than 0.3mm. The voice coil is made of copper wire, copper-clad aluminum, or aluminum wire.

[0010] Preferably, the diaphragm consists of a suspended edge with a folded ring and a flat dome. The folded ring is made of PU, TPEE, or a composite material, and the dome has a flat structure and is made of a rigid material.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] This utility model improves the flat panel speaker by embedding the washer at the bottom of the housing, allowing it to directly contact the magnetic circuit. This enhances the magnetic conductivity at the bottom of the magnetic circuit and improves the speaker's sensitivity. Furthermore, the single magnetic circuit design incorporates a flat surface on both the outer magnet and the washer, enabling the PCB to be vertically mounted and embedded in the side of the housing. By placing the PCB on the side and combining it with the single magnetic circuit and washer embedding design, the overall thickness and outer diameter of the flat panel speaker can be reduced, resulting in a thinner and smaller speaker that better meets user needs. Attached Figure Description

[0013] Figure 1 This is a top view of the assembly of this utility model;

[0014] Figure 2 This is an assembly drawing of the present invention viewed from below.

[0015] Figure 3 This is an exploded view of the present invention;

[0016] Figure 4 This is a cross-sectional view of the present invention;

[0017] Figure 5 This is a diagram comparing the BL values ​​with and without washer.

[0018] In the diagram: 1. Outer shell; 2. Washer; 3. Outer magnet; 4. Inner magnet; 5. Voice coil; 6. Diaphragm; 7. PCB. Detailed Implementation

[0019] 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.

[0020] To address the issues of low magnetic permeability and sensitivity, as well as large size, in existing flat panel speakers that fail to meet usage requirements, please refer to... Figure 1-3 The following technical solution is provided in this embodiment:

[0021] A flat panel speaker with a washer includes a housing 1, with a washer 2 embedded in the bottom of the housing 1, which does not occupy height space. The thickness of the washer 2 is 0.1mm-0.4mm, and the washer 2 is made of SPCC or SPCE magnetic conductive material.

[0022] Specifically, such as Figure 5 As shown, by embedding a washer 2 at the bottom of the flat-panel speaker, the BL value of the speaker with the washer structure (as shown by curve a) is increased by 30% compared with the speaker without the washer structure (as shown by curve b), and the speaker sensitivity is increased by more than 3dB.

[0023] The upper surface of the washer 2 is attached with an outer magnet 3 and an inner magnet 4. The magnetic field at the bottom of the outer magnet 3 and the inner magnet 4 is introduced above the outer magnet 3 and the inner magnet 4 through the washer 2, which increases the efficiency of the voice coil 5 in the magnetic field.

[0024] The outer magnet 3 is located around the inner magnet 4. Both the outer magnet 3 and the inner magnet 4 are neodymium iron boron permanent magnets. The magnetism of the outer magnet 3 and the inner magnet 4 is opposite, and both the outer magnet 3 and the inner magnet 4 are magnetic in the Y-axis direction. In addition to the shape of the outer magnet 3, the inner magnet 4 and the washer 2 shown in this embodiment, the outer magnet 3, the inner magnet 4 and the washer 2 can also be designed as square.

[0025] Specifically, the magnetic circuit system consists of an outer magnet 3 and an inner magnet 4. The magnetic circuit can be circular or square. There may or may not be a gap between the outer magnet 3 and the inner magnet 4.

[0026] A voice coil 5 is disposed above the outer magnet 3 and the inner magnet 4. The voice coil 5 is bonded to the diaphragm 6. In this embodiment, the voice coil 5 is bonded to the bottom of the diaphragm 6. Alternatively, another voice coil 5 can be bonded to the corresponding position on the top of the diaphragm 6, that is, voice coils 5 are bonded to both the top and bottom of the diaphragm 6, thus forming a double voice coil structure (not shown in the illustration of this embodiment). The voice coil 5 shown in this embodiment is a flat annular shape. The thickness of the voice coil 5 is 0.05mm-0.3mm, and the width of the voice coil 5 is greater than 0.3mm. The voice coil 5 is made of copper wire, copper-clad aluminum, or aluminum wire. In addition, the voice coil 5 can also be designed as a square. The diaphragm 6 shown in this embodiment is circular, but it can also be designed as a square.

[0027] The diaphragm 6 is embedded in the upper part of the housing 1. The side of the outer magnet 3 and the side of the washer 2 are provided with flat parts that are flush with each other. The PCB 7 is vertically installed in the groove on the side of the housing 1. The height of the PCB 7 is equal to the height of the outer magnet 3 plus the height of the washer 2. The PCB 7 is connected to the voice coil 5 through wires.

[0028] The diaphragm 6 consists of a suspension edge with a folded surround and a flat dome. The folded surround 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 rigid material. Voice coils 5 are bonded to both the top and bottom of the diaphragm 6 to form a double voice coil structure, which doubles the number of coil turns in the flat panel speaker and improves the sensitivity by 3dB.

[0029] like Figure 4 As shown, the dashed lines represent the magnetic field lines from the center (N) to the outer (S) of the magnet.

[0030] The flat panel speaker has a washer 2 embedded in its bottom, which can improve the magnetic conductivity at the bottom of the magnetic circuit and increase the sensitivity of the flat panel speaker. The PCB7 is located on the side, which can reduce the overall thickness and outer diameter of the flat panel speaker, making the flat panel speaker thinner and smaller in size.

[0031] 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 flat panel loudspeaker with a horn, comprising a housing (1), characterized in that: The bottom of the shell (1) is embedded with a vsm (2), the upper surface of the vsm (2) is adhered with an outer magnet (3) and an inner magnet (4), the magnetic field at the bottom of the outer magnet (3) and the inner magnet (4) is guided to the upper part of the outer magnet (3) and the inner magnet (4) through the vsm (2), the upper part of the outer magnet (3) and the inner magnet (4) is provided with a voice coil (5) adhered to a diaphragm (6), the side surface of the outer magnet (3) and the side surface of the vsm (2) are provided with plane parts which are flush with each other, and the plane parts are vertically installed with a PCB (7) embedded in the side groove of the shell (1).

2. The flat panel loudspeaker with a horn according to claim 1, characterized in that: The thickness of the vsm (2) is 0.1mm-0.4mm.

3. The flat panel loudspeaker with a horn according to claim 1, wherein: The outer magnet (3) is located at the periphery of the inner magnet (4), and the outer magnet (3) and the inner magnet (4) are both neodymium iron boron permanent magnets.

4. The flat panel loudspeaker with a horn according to claim 1, wherein: The magnetism of the outer magnet (3) and the inner magnet (4) is opposite, and the outer magnet (3) and the inner magnet (4) are both Y-axis direction magnetism.

5. The flat panel loudspeaker with a horn according to claim 1, wherein: The voice coil (5) is a flat ring shape, the thickness of the voice coil (5) is 0.05mm-0.3mm, and the width of the voice coil (5) is greater than 0.3mm.

6. The flat panel loudspeaker with a horn according to claim 1, wherein: The diaphragm (6) is composed of a suspension edge with a folded ring and a plane dome, the dome is a flat structure, and the diaphragm (6) is embedded in the upper end of the shell (1).

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