A dual magnetic circuit monobloc earphone

Abstract

The utility model relates to earphone technical field especially, it relates to a double magnetic circuit monomer's earphone, its technical scheme includes: earphone unit, earphone unit includes the earplug, front cavity, back cavity and back cover that connect gradually, is provided with main magnetic ring, PCB board, voice coil, diaphragm, installation shell, vice magnetic ring and T iron in the front cavity, main magnetic ring and vice magnetic ring coaxial arrangement and form the magnetic gap, voice coil is located in the magnetic gap, vice magnetic ring passes through displacement component and moves along earphone unit axial displacement to adjust the magnetic gap size, PCB board and voice coil electric connection are used for driving diaphragm to sound, back cavity is equipped with the female seat connecting cable. The utility model discloses double magnetic circuit monomer earphone utilizes displacement component to adjust the main vice magnetic ring spacing and through the rubber dial piece spacing preventing loose, thereby accurate control magnetic field intensity and keep the tone quality stable.

Description

Technical Field

[0001] This utility model relates to the field of headphone technology, and in particular to a headphone with a dual magnetic circuit single unit. Background Technology

[0002] Most existing headphone units use a single magnetic circuit structure, which uses a single magnetic ring and a T-iron to form a magnetic field, driving the voice coil to move the diaphragm and produce sound. However, this single magnetic circuit structure has the following shortcomings:

[0003] In a single magnetic circuit structure, the relative positions of the main magnetic ring and the voice coil are fixed, and the size of the magnetic gap cannot be changed. This results in a constant magnetic field strength on the voice coil, making it impossible to optimize acoustic performance according to different music types or frequency characteristics. The fixed magnetic gap also makes the driving force constant, making it difficult to achieve deeper bass extension in the low-frequency range and difficult to improve resolution in the high-frequency range. As a result, the overall playability and compatibility of the headphones are relatively low.

[0004] Therefore, we propose a dual-magnetic-circuit single-unit earphone to solve the existing problems. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the background technology by proposing a dual-magnetic-circuit single-unit earphone.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a dual magnetic circuit single-unit earphone, comprising an earphone unit, wherein the earphone unit comprises an earbud, a front cavity, a rear cavity, and a back cover connected in sequence;

[0007] The front cavity is equipped with a main magnetic ring, a PCB board, a voice coil, a diaphragm, a mounting shell, a secondary magnetic ring, and a T-iron. The mounting shell is fixed inside the front cavity. The outer edge of the diaphragm is fixedly connected to the inner wall of the mounting shell, and its center is fixedly connected to the voice coil. The voice coil is located in the inner gap of the main magnetic ring and can vibrate axially under the action of a magnetic field. The main magnetic ring is fixedly installed inside the mounting shell and is coaxially arranged with the secondary magnetic ring. The secondary magnetic ring is located inside the main magnetic ring and adjacent to the T-iron. The T-iron is fixedly connected to the mounting shell and is used to guide magnetic flux to form a magnetic circuit. A magnetic gap is left between the main magnetic ring and the secondary magnetic ring to accommodate the radial movement space of the voice coil. The secondary magnetic ring can move axially along the headphone unit under the drive of the displacement component to change the size of the magnetic gap.

[0008] The displacement assembly includes a square rod, a slide block, a screw, and a screw seat, wherein the screw passes through the screw seat and is connected to the square rod. The displacement assembly can control the movement of the secondary magnetic ring to move closer to or away from the main magnetic ring.

[0009] Preferably, the slide block is fixedly mounted on the rear cover, the square rod is slidably inserted into the slide block, one end of the square rod is fixedly mounted on the secondary magnetic ring, and the other end of the square rod is fixedly mounted with a screw.

[0010] Preferably, the screw seat is rotatably mounted on the slide block, the screw seat is threadedly engaged with the screw, and the outer wall of the screw seat is provided with equidistant paddles. The paddles are made of rubber and are in contact with the slide block, thereby increasing the rotational friction between the screw seat and the slide block.

[0011] Preferably, the PCB board is electrically connected to the voice coil to drive the diaphragm to vibrate and produce sound, and a female connector is provided on the rear cavity for connecting cables.

[0012] Preferably, a metal mesh is provided between the earplug and the front cavity, i.e. at the opening of the front cavity. The metal mesh is a sound-permeable and dustproof fine-pore mesh structure, and is fixed by a snap-on method.

[0013] Preferably, the two earphone units are connected to a splitter via cables, and the splitter is connected to a plug via cables.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] In the use of the dual magnetic circuit single-unit earphone of this utility model, the main magnetic ring and the auxiliary magnetic ring are arranged coaxially, and the magnetic flux is guided by the T iron to form a dual magnetic circuit, which has a higher magnetic field utilization rate and enhanced voice coil driving force, thereby improving the diaphragm response speed and sound resolution.

[0016] The operator can rotate the screw seat using a paddle. Through the threaded engagement between the screw seat and the screw rod, and with the square rod constrained by the slide block preventing the screw from rotating, the square rod drives the secondary magnetic ring to move axially under the principle of a lead screw. This changes the distance between the secondary and primary magnetic rings. Simultaneously, the rubber paddle design increases the rotational friction between the slide block and the screw seat, preventing the screw from spinning without manual intervention. In the above scenario, the displacement component drives the secondary magnetic ring to move axially along the headphone unit, flexibly changing the magnetic gap between the primary and secondary magnetic rings. This allows for precise control of the magnetic field strength of the voice coil, meeting different tonal requirements.

[0017] The outer wall of the screw seat is equipped with wear-resistant and anti-aging rubber shims, which make pre-pressed contact with the slide surface to form a constant frictional damping force, effectively preventing the screw from spinning under external vibration, drop or resonance, and ensuring the stability of the magnetic gap during long-term use. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0019] Figure 2 This is a cross-sectional view of the headphone unit of this utility model;

[0020] Figure 3 This is a bottom-view structural diagram of the headphone unit of this utility model;

[0021] Figure 4 This is a schematic diagram of the displacement component structure of this utility model.

[0022] Figure label:

[0023] 1. Plug; 2. Cable; 3. Splitter; 4. Earphone unit; 401. Earbud; 402. Front cavity; 403. Main magnetic ring; 404. PCB board; 405. Rear cavity; 406. Back cover; 407. Metal mesh; 408. Voice coil; 409. Diaphragm; 410. Mounting shell; 411. Secondary magnetic ring; 412. T-iron; 413. Female connector; 5. Displacement assembly; 501. Square rod; 502. Slide; 503. Screw; 504. Screw seat. Detailed Implementation

[0024] 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.

[0025] Example 1

[0026] like Figures 1-4 As shown, the present invention proposes a dual-magnetic-circuit single-unit earphone, comprising two earphone units 4. The two earphone units 4 are connected to a splitter 3 via a cable 2, and the splitter 3 is then connected to a plug 1 via a cable 2.

[0027] The earphone unit 4 is connected in sequence to the earbud 401, the front cavity 402, the rear cavity 405 and the back cover 406. A metal mesh 407 is provided at the opening of the front cavity 402. The metal mesh 407 is a fine mesh structure that is sound-permeable and dustproof, and is fixed between the front cavity 402 and the earbud 401 by a snap-fit ​​method.

[0028] The front cavity 402 is equipped with a main magnetic ring 403, a PCB board 404, a voice coil 408, a diaphragm 409, a mounting shell 410, a secondary magnetic ring 411, and a T-iron 412. The mounting shell 410 is fixed inside the front cavity 402. The outer edge of the diaphragm 409 is fixed to the inner wall of the mounting shell 410. The center of the diaphragm 409 is fixed to the voice coil 408.

[0029] The voice coil 408 is disposed in the inner gap of the main magnetic ring 403 and can vibrate axially under the action of a magnetic field. The main magnetic ring 403 is fixed in the mounting shell 410 and is arranged coaxially with the auxiliary magnetic ring 411. The auxiliary magnetic ring 411 is located inside the main magnetic ring 403 and is adjacent to the T-iron 412. The T-iron 412 is fixedly connected to the mounting shell 410 and is used to guide the magnetic flux to form a magnetic circuit. A magnetic gap is left between the main magnetic ring 403 and the auxiliary magnetic ring 411 to accommodate the radial movement space of the voice coil 408.

[0030] The PCB board 404 is electrically connected to the voice coil 408 to drive the diaphragm 409 to vibrate and produce sound. The rear cavity 405 is provided with a female connector 413 for connecting the cable 2. The female connector 413 is electrically connected to the PCB board 404 to realize signal transmission between the headphones and the external sound source.

[0031] Example 2

[0032] like Figures 1-4 As shown, the present invention proposes a dual magnetic circuit single-unit earphone. Compared with Embodiment 1, this embodiment further includes: the auxiliary magnetic ring 411 is driven by the displacement component 5 to move along the axial direction of the earphone unit 4, thereby changing the size of the magnetic gap.

[0033] The displacement assembly 5 includes a square rod 501, a slide block 502, a screw rod 503, and a screw seat 504. The slide block 502 is fixed on the rear cover 406. The square rod 501 is slidably inserted into the slide block 502. One end is fixedly connected to the auxiliary magnetic ring 411, and the other end is fixedly connected to the screw rod 503. The screw rod 503 passes through the screw seat 504 and is connected to the square rod 501. The screw seat 504 is rotatably mounted on the slide block 502 and is threadedly engaged with the screw rod 503. By rotating the screw seat 504, the screw rod 503 is driven to move axially, thereby pushing the square rod 501 to drive the auxiliary magnetic ring 411 closer to or away from the main magnetic ring 403.

[0034] The outer wall of the screw seat 504 is equidistantly distributed with several paddles. The paddles are made of wear-resistant and anti-aging rubber material and make pre-press contact with the inner wall of the slide seat 502 to form a constant frictional damping force, thereby preventing the screw 503 from spinning under external vibration or impact and ensuring the stability of the magnetic gap. To optimize the feel and damping durability, the surface of the paddles can be provided with fine textures, and the contact surface between the paddles and the slide seat 502 is coated with high and low temperature resistant silicone oil.

[0035] The above specific embodiments are merely several preferred embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A dual-magnetic-circuit single-unit earphone, comprising an earphone unit (4), characterized in that: The headphone unit (4) includes an earbud (401), a front cavity (402), a rear cavity (405), and a back cover (406) connected in sequence. The front cavity (402) is provided with a main magnetic ring (403), a PCB board (404), a voice coil (408), a diaphragm (409), a mounting shell (410), a secondary magnetic ring (411), and a T-iron (412). The mounting shell (410) is fixed inside the front cavity (402). The outer edge of the diaphragm (409) is fixedly connected to the inner wall of the mounting shell (410), and its center is fixedly connected to the voice coil (408). The voice coil (408) is located in the inner gap of the main magnetic ring (403) and can vibrate axially under the action of a magnetic field. The main magnetic ring (403) is located in the inner gap of the main magnetic ring (404) and can vibrate axially under the action of a magnetic field. 03) Fixedly installed inside the mounting shell (410) and coaxially arranged with the secondary magnetic ring (411). The secondary magnetic ring (411) is located inside the main magnetic ring (403) and adjacent to the T-iron (412). The T-iron (412) is fixedly connected to the mounting shell (410) and is used to guide the magnetic flux to form a magnetic circuit. A magnetic gap is left between the main magnetic ring (403) and the secondary magnetic ring (411) to accommodate the radial movement space of the voice coil (408). The secondary magnetic ring (411) can move along the axial direction of the headphone unit (4) under the drive of the displacement component (5) to change the size of the magnetic gap. The displacement assembly (5) includes a square rod (501), a slide (502), a screw (503) and a screw seat (504), wherein the screw (503) passes through the screw seat (504) and is connected to the square rod (501). The displacement assembly (5) can control the secondary magnetic ring (411) to move closer to or further away from the main magnetic ring (403).

2. The earphone with a dual magnetic circuit single unit according to claim 1, characterized in that: The slide block (502) is fixedly mounted on the rear cover (406), the square rod (501) is slidably inserted into the slide block (502), one end of the square rod (501) is fixedly mounted on the auxiliary magnetic ring (411), and the other end of the square rod (501) is fixedly mounted with a screw (503).

3. The earphone with a dual magnetic circuit single unit according to claim 1, characterized in that: The screw seat (504) is rotatably mounted on the slide (502). The screw seat (504) is threadedly engaged with the screw (503). The outer wall of the screw seat (504) is provided with equidistant paddles. The paddles are made of rubber and are in contact with the slide (502), thereby increasing the rotational friction between the screw seat (504) and the slide (502).

4. The earphone with a dual magnetic circuit single unit according to claim 1, characterized in that: The PCB board (404) is electrically connected to the voice coil (408) to drive the diaphragm (409) to vibrate and produce sound. The rear cavity (405) is provided with a female connector (413) for connecting the cable (2).

5. The earphone with a dual magnetic circuit single unit according to claim 1, characterized in that: A metal mesh (407) is provided between the earplug (401) and the front cavity (402), i.e. at the opening of the front cavity (402). The metal mesh (407) is a fine-pore mesh structure that is sound-permeable and dustproof, and is fixed by a snap-on method.

6. The earphone with a dual magnetic circuit single unit according to claim 1, characterized in that: The two headphone units (4) are connected to a splitter (3) via a cable (2), and the splitter (3) is connected to a plug (1) via a cable (2).

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