Novel flat plate type headphone

Abstract

The utility model discloses a novel flat plate type headphone, which comprises a coil, a vibrating diaphragm and a first row-shaped magnet, the first row-shaped magnets comprise transverse magnets which are arranged in a staggered manner at intervals, and N poles of the transverse magnets are parallel to the vibrating diaphragm; vertical magnets are arranged between the transverse magnetic poles which are arranged at intervals in a staggered mode, and the N pole of each vertical magnet is perpendicular to the vibrating diaphragm. Inclined magnets used for forming a transition magnetic field with the transverse magnets are also arranged between the transverse magnets which are arranged at intervals in a staggered manner; an angle is formed between the N-pole direction of the inclined magnets and the vibrating diaphragm; the coil is connected between the positive electrode and the negative electrode of the signal source, and the wiring position of the coil is correspondingly arranged on the vibrating diaphragm located on the straight line projected by the transverse magnet. According to the utility model, through reasonable inclined, parallel and vertical magnet arrangement, the magnetic field efficiency is improved, and the edge center strength is enhanced.

Description

Technical Field

[0001] This utility model belongs to the field of loudspeaker technology, specifically relating to a novel planar magnetic headphone. Background Technology

[0002] Planar magnetic headphones are a type of Hi-Fi headphone. They primarily produce sound by using the magnetic force generated by magnets with opposite pole directions to drive a diaphragm containing a coil to vibrate. Current planar magnetic headphones typically have two rows of magnets, one above the other, with the diaphragm positioned in the middle. The upper and lower magnets attract each other, while the left and right magnets in the same row attract each other. The portion of the diaphragm containing the coil is located between the upper and lower magnetic poles. The existing magnetic pole arrangement has two directions: perpendicular to the diaphragm, the strongest magnetic force is located in the middle of two adjacent magnets. The coil is primarily located in the middle of adjacent magnets. The main driving force for the coil is the magnetic force at the opposing center position. The strongest magnetic force is not at the opposing magnet position, but rather in the middle of horizontally adjacent magnets. The weakest magnetic force is at the exact center of the opposing planar magnetic poles. The coil wiring is limited to extending to the left and right of the center of adjacent magnets, but cannot exceed the exact center.

[0003] To increase magnetic field strength and efficiency, the main methods currently used are to reduce the spacing between magnets or increase their volume. While these methods can improve efficiency to some extent, the efficiency remains relatively low due to the portability and size constraints of headphones.

[0004] Patent CN206136279U discloses a planar diaphragm speaker, which improves the sound pressure level by using a reinforcing magnet with transverse magnetic poles. However, the drawback is that some magnetic field still leaks on the other side, affecting surrounding electronic components, and the center strength of the speaker is relatively weak.

[0005] The information disclosed in the above background section is only intended to enhance the understanding of the overall background of this utility model, and should not be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to provide a novel planar magnetic headphone that, without changing the placement of the magnets, changes the magnetization direction of the magnets, thereby greatly improving the magnetic field efficiency and strengthening the edge and center strength.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A novel planar magnetic headphone includes: a coil, a diaphragm, and a first row of magnets disposed on one side of the diaphragm; the first row of magnets includes staggered horizontal magnets, the N pole of which is parallel to the diaphragm; vertical magnets are disposed between the staggered horizontal magnets, the N pole of which is perpendicular to the diaphragm; oblique magnets for forming a transition magnetic field with the horizontal magnets are also disposed between the staggered horizontal magnets, the N pole of which is angled to the diaphragm; the coil is connected between the positive and negative poles of a signal source, and the coil wiring is positioned on the diaphragm along the line projected by the horizontal magnets.

[0009] Specifically, the first row of magnets includes a first magnet, a second magnet, a third magnet, a fourth magnet, a fifth magnet, a sixth magnet, and a seventh magnet arranged alternately from left to right. The N pole of the first magnet points to the right and is inclined towards the diaphragm; the N pole of the second magnet points to the left and is parallel to the diaphragm; the N pole of the third magnet points to the left and is inclined away from the diaphragm; the N pole of the fourth magnet points to the right and is parallel to the diaphragm; the N pole of the fifth magnet is perpendicular to the diaphragm; the N pole of the sixth magnet points to the left and is parallel to the diaphragm; and the N pole of the seventh magnet points to the right and is inclined away from the diaphragm.

[0010] Specifically, the wiring of the coil covers the second magnet, the fourth magnet, and the sixth magnet, and at least extends to cover a portion of the first magnet, the third magnet, the fifth magnet, and the seventh magnet, wherein the fifth magnet covered does not exceed the center position of its N pole.

[0011] Specifically, it also includes a second row of magnets, which are arranged on both sides of the diaphragm in a mirror image manner with the first row of magnets.

[0012] Specifically, the first row of magnets and the second row of magnets have the same gap between adjacent magnets.

[0013] Specifically, it also includes a magnetic circuit frame, a diaphragm mounting frame, and a magnetic circuit lower frame. The first row of magnets is fixed in the magnetic circuit frame with glue. The coil and diaphragm are set in the diaphragm mounting frame, which is fixed to the magnetic circuit frame with screws. The second row of magnets is fixed in the magnetic circuit lower frame with glue and connected to the diaphragm mounting frame with screws to form a whole magnetic circuit.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. This design incorporates oblique magnets. Through a reasonable arrangement of tilted, parallel, and vertical magnets, the oblique magnets and adjacent magnets create a magnetic field superposition effect, enhancing the magnetic flux density. This makes the diaphragm more stressed, and the increased driving force means that under the same current, the diaphragm can achieve a greater displacement, resulting in higher headphone sensitivity and a more impactful sound.

[0016] 2. Simulation results show that the magnet arrangement in this scheme still achieves a magnetic field strength of 0.46 in the weakest region, far exceeding the 0.37 of the existing design. This makes the magnetic field distribution more uniform, allowing the diaphragm to be subjected to a more stable force throughout the entire working area, expanding the effective sound generation area, reducing deformation, reducing nonlinear distortion, reducing edge eddy current loss, and improving sound fidelity.

[0017] 3. By utilizing the tilt angle of the magnets, the magnetic flux is effectively superimposed, generating a stronger magnetic field within the same volume. This allows for a reduction in the number of magnets needed while maintaining the same driving force, lowering costs and making the headphones lighter and more comfortable to wear.

[0018] 4. This solution optimizes the distribution of magnetic field lines. By arranging the magnets reasonably, the magnetic field lines are concentrated as much as possible in the diaphragm area, reducing the ineffective magnetic flux radiated outward, reducing the impact of external magnetic interference, improving anti-interference ability, and making the headphone system more stable. Attached Figure Description

[0019] Figure 1 This is an exploded view of a novel planar magnetic headphone according to this utility model.

[0020] Figure 2 This is a schematic diagram showing the magnetic pole orientation of a novel planar magnetic headphone according to this utility model.

[0021] Figure 3 This is a schematic diagram of the software simulation of this utility model.

[0022] Figure 4 This is the wiring diagram for the flat panel earphone of this utility model.

[0023] In the diagram, 1-first magnet; 2-second magnet; 3-third magnet; 4-fourth magnet; 5-fifth magnet; 6-sixth magnet; 7-seventh magnet; 8-magnetic circuit frame; 9-diaphragm mounting frame; 10-diaphragm; 11-coil; 12-magnetic circuit lower frame. Detailed Implementation

[0024] To explain the technical content, objectives, and effects of this utility model in detail, the following description is provided in conjunction with embodiments and accompanying drawings. In the description of these embodiments, it should be understood that terms indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing this embodiment and simplifying the description. They do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0025] The technical solution adopted in this embodiment is a novel planar magnetic headphone, such as... Figure 1-4 As shown, it mainly includes a magnetic circuit frame 8, a diaphragm 10 mounting frame 9, a magnetic circuit lower frame 12, a coil 11, a diaphragm 10, and a first row of magnets and a second row of magnets disposed on both sides of the diaphragm 10.

[0026] After the first row of magnets in the upper row is magnetized, it is fixed to the frame 8 of the magnetic circuit with glue. The coil 11 and diaphragm 10 in the middle are set in the diaphragm mounting frame 9. The diaphragm mounting frame 9 is fixed to the frame 8 of the magnetic circuit with glue or screws. At the same time, after the second row of magnets in the lower row is magnetized, it is fixed to the lower frame 12 of the magnetic circuit with glue and then connected to the middle diaphragm 10 to form a whole magnetic circuit.

[0027] The array of magnets in this embodiment includes eight directions, with the N pole as the reference. The N pole is divided into up, down, left, and right. The up and down magnetic pole directions are 180° apart, the left and right directions are 90° apart with the up and down directions, and the right direction is 90° apart with the up and down directions. The magnets are tilted at 45° towards the diaphragm 10 and towards the original diaphragm 10.

[0028] like Figure 1 , 2 As shown, the first and second rows of magnets are arranged on both sides of the diaphragm 10 in a mirror image configuration. The first row of magnets includes a first magnet 1, a second magnet 2, a third magnet 3, a fourth magnet 4, a fifth magnet 5, a sixth magnet 6, and a seventh magnet 7, arranged alternately from left to right. The N pole of the first magnet 1 points to the right and is inclined toward the diaphragm 10; the N pole of the second magnet 2 points to the left and is parallel to the diaphragm 10; the N pole of the third magnet 3 points to the left and is inclined away from the diaphragm 10; the N pole of the fourth magnet 4 points to the right and is parallel to the diaphragm 10; the N pole of the fifth magnet 5 is perpendicular to the direction toward the diaphragm 10; the N pole of the sixth magnet 6 points to the left and is parallel to the diaphragm 10; and the N pole of the seventh magnet 7 points to the right and is inclined away from the diaphragm 10.

[0029] The difference between this design and the magnetic field formed by conventional magnets lies in the addition of transverse and oblique magnetic poles. The oblique magnets and parallel magnets form a transitional magnetic field, resulting in a more uniform magnetic flux density. The fifth magnet 5 provides vertical magnetic flux, enhancing the force on the diaphragm 10 and increasing the driving force. Through a reasonable arrangement of oblique, parallel, and vertical magnets, such as… Figure 3 As shown, simulation results indicate that the magnet arrangement in this scheme still achieves a magnetic field strength of 0.46 in the weakest region, far exceeding the 0.37 of existing designs. The advantages of this approach are twofold. First, compared to traditional magnetic arrays, this arrangement allows for a magnetic field superposition effect between the oblique magnets and adjacent magnets, more effectively guiding the magnetic flux to the desired area. Magnetic field lines converge and superimpose near the oblique magnets, resulting in a significant increase in magnetic flux. Second, the magnetic field is stronger and more stable in the edge regions, reducing the risk of nonlinear distortion in the diaphragm and improving the headphone's sound performance.

[0030] In this embodiment, as Figure 4 As shown, the coil 11 is connected between the positive and negative poles of the signal source. The coil 11 includes parallel straight line segments and arc-shaped segments connected to the ends of adjacent straight line segments. The straight line segments are correspondingly arranged on the diaphragm 10 located on the projected straight lines of the second magnet 2, the fourth magnet 4, and the sixth magnet 6. Preferably, the wiring position of the coil covers the second magnet 2, the fourth magnet 4, and the sixth magnet 6, and at least extends to cover a portion of the first magnet 1, the third magnet 3, the fifth magnet 5, and the seventh magnet 7, wherein the covered portion of the fifth magnet 5 does not exceed the center position of its N pole.

[0031] Due to the addition of horizontally arranged magnetic poles, the strongest magnetic force is located in the horizontal direction (left-right direction) after the magnetic fields are superimposed. Coil 11 is positioned at the center of the horizontal magnet; coil 11 wiring is not routed around the centers of other magnets, but can extend to adjacent magnets. The wiring extends from the N-position of the horizontal magnet, spanning the magnetic gap, partially covering the oblique and vertical magnets, but not exceeding the center of the vertical magnet. The total wiring area is 10%–15% larger than that of a conventional planar magnetic speaker. According to Ampere's law, the force-bearing area of ​​the diaphragm 10 also increases. With an increased force-bearing area, the force received by the diaphragm 10 becomes more uniform and ideal, resulting in better speaker performance. This ensures that coil 11 is always in the region with the strongest and most suitable magnetic field direction, avoiding interference from magnetic field non-uniformity on diaphragm vibration, and achieving a balance between performance and manufacturing cost.

[0032] Although the present invention has been described in detail above with specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A novel planar magnetic headphone, comprising: A coil, a diaphragm, and a first row of magnets disposed on one side of the diaphragm; characterized in that: The first row of magnets includes staggered horizontal magnets, the N pole of which is parallel to the diaphragm; vertical magnets are arranged between the staggered horizontal magnets, the N pole of which is perpendicular to the diaphragm; and oblique magnets are also arranged between the staggered horizontal magnets to form a transition magnetic field with the horizontal magnets, the N pole of which is at an angle to the diaphragm. The coil is connected between the positive and negative poles of the signal source, and the coil wiring position is set on the diaphragm located on the straight line projected by the transverse magnet.

2. The novel planar magnetic headphone according to claim 1, characterized in that: The first row of magnets includes a first magnet, a second magnet, a third magnet, a fourth magnet, a fifth magnet, a sixth magnet, and a seventh magnet arranged alternately from left to right. The N pole of the first magnet points to the right and is inclined towards the diaphragm; the N pole of the second magnet points to the left and is parallel to the diaphragm; the N pole of the third magnet points to the left and is inclined away from the diaphragm; the N pole of the fourth magnet points to the right and is parallel to the diaphragm; the N pole of the fifth magnet is perpendicular to the diaphragm; the N pole of the sixth magnet points to the left and is parallel to the diaphragm; and the N pole of the seventh magnet points to the right and is inclined away from the diaphragm.

3. The novel planar magnetic headphone according to claim 2, characterized in that: The wiring of the coil covers the second magnet, the fourth magnet, and the sixth magnet, and extends to cover at least a portion of the first magnet, the third magnet, the fifth magnet, and the seventh magnet, wherein the fifth magnet covered does not exceed the center position of its N pole.

4. A novel planar magnetic headphone according to any one of claims 1-3, characterized in that: It also includes a second row of magnets, which are arranged on both sides of the diaphragm in a mirror image manner with the first row of magnets.

5. A novel planar magnetic headphone according to claim 4, characterized in that: The first and second rows of magnets have the same gap between adjacent magnets.

6. A novel planar magnetic headphone according to claim 5, characterized in that: It also includes a magnetic circuit frame, a diaphragm mounting frame, and a magnetic circuit lower frame. The first row of magnets is fixed in the magnetic circuit frame with glue. The coil and diaphragm are set in the diaphragm mounting frame, which is fixed to the magnetic circuit frame with screws. The second row of magnets is fixed in the magnetic circuit lower frame with glue and connected to the diaphragm mounting frame with screws to form a whole magnetic circuit.

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