Loudspeaker with double voice coil structure

Abstract

The utility model discloses a loudspeaker with a double-voice-coil structure, which comprises a support, an elastic sheet, a U-shaped cup, a first magnetic circuit assembly and a second magnetic circuit assembly, and is characterized in that the support is a cavity with a first opening and a second opening at the upper end and the lower end respectively; the elastic pieces are a first elastic piece arranged on the upper portion of the inner wall of the cavity and a second elastic piece arranged on the lower portion of the inner wall of the cavity, the upper end of the U-shaped cup is connected with the first elastic piece, the lower wall of the first vibration plate is provided with a first voice coil extending into the first magnetic circuit assembly, and the second magnetic circuit assembly is arranged on the periphery of the U-shaped cup. The upper wall of the second vibration plate is provided with a second voice coil extending into the second magnetic circuit gap. Through the arrangement of the double voice coils and the double elastic sheets, the loudspeaker can be provided with the first magnetic circuit assembly and the second magnetic circuit assembly at the inner periphery position and the outer periphery position of the U-shaped cup respectively, the first voice coil is located at the inner periphery and can be used for being responsible for high pitch, the second voice coil is located at the outer periphery and can be used for being responsible for mid-bass, and then the tone quality of the bone conduction earphone is improved.

Description

Technical Field

[0001] The utility model relates to the field of loudspeakers, and particularly relates to a loudspeaker with a double voice coil structure. Background Art

[0002] Bone conduction is a sound conduction method, that is, sound is converted into mechanical vibrations of different frequencies and transmitted through the human skull, bony labyrinth, inner ear lymph, spiral organ, and auditory center to transmit sound waves.

[0003] However, the existing bone conduction loudspeakers mainly include two factors: vibration frequency and amplitude, that is, vibration amplitude and vibration frequency. Different vibrations of the vibrating plate are controlled by a transducer device, and then converted into high, medium, and low sounds.

[0004] However, the existing bone conduction loudspeakers generally only have one voice coil and a diaphragm, so the corresponding vibration frequency and amplitude will be limited. It can be understood that when the vibration frequency is wider, the sound quality is more delicate; when the amplitude is wider, the scale is wider (when the amplitude exceeds a predetermined value, it may cause cracking or decibel attenuation).

[0005] Of course, there are also bone conduction loudspeakers with a double diaphragm structure, such as Chinese Patent 202322604566.2. However, the two diaphragms are located at the uppermost and lowermost positions of the housing respectively. Then, when the voice coil works, the vibration amplitude of the vibration component will also be affected. Summary of the Utility Model

[0006] The main purpose of the utility model is to propose a loudspeaker with a double voice coil structure, aiming to adopt the combination of double diaphragms and double voice coils, thereby improving the vibration frequency and amplitude of the loudspeaker, effectively improving the sound quality of the high, medium, and low frequencies of the bone conduction earphone, and further improving the use experience of the bone conduction loudspeaker.

[0007] To achieve the above purpose, the utility model proposes a loudspeaker with a double voice coil structure, including:

[0008] A bracket, the bracket is a cavity with a first opening and a second opening respectively provided at the upper end and the lower end;

[0009] Diaphragms, there are two diaphragms, namely a first diaphragm provided on the upper part of the inner wall of the cavity and a second diaphragm provided on the lower part of the inner wall of the cavity;

[0010] A U-cup, the U-cup is provided with a positioning cavity, the upper end of the U-cup is connected to the first diaphragm, and the third opening of the positioning cavity is oppositely arranged with the first opening;

[0011] The first magnetic circuit component is disposed in the positioning cavity. A first magnetic circuit gap is provided between the outer peripheral wall of the first magnetic circuit component and the inner peripheral wall of the U cup. The first opening is provided with a first vibrating plate, and a first voice coil extending into the first magnetic circuit component is provided on the lower wall of the first vibrating plate;

[0012] The second magnetic circuit component is disposed between the first elastic piece and the second elastic piece. The second magnetic circuit component is disposed at the peripheral position of the U cup. A second magnetic circuit gap is provided between the inner peripheral wall of the second magnetic circuit component and the outer peripheral wall of the U cup.

[0013] The second opening is provided with a second vibrating plate, and a second voice coil extending into the second magnetic circuit gap is provided on the upper wall of the second vibrating plate.

[0014] Through the arrangement of the double voice coils and the double elastic pieces, the loudspeaker can be provided with the first magnetic circuit component and the second magnetic circuit component at the inner peripheral position and the outer peripheral position of the U cup respectively. The first voice coil at the inner periphery can be used to be responsible for high tones (heavy tones), and the second voice coil at the outer periphery can be used to be responsible for mid-bass, thereby improving the sound quality of the bone conduction headset;

[0015] In actual control, the first voice coil and the second voice coil can work separately by independent driving, or a hybrid driving device can be used to achieve simultaneous or combined or intermittent work, thereby improving the sound quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a cross-sectional view of the present utility model;

[0017] Figure 2 is a half-sectional schematic view of the present utility model;

[0018] Figure 3 is a schematic view of the present utility model after hiding the bracket.

[0019] In the figure,

[0020] 1 is a bracket, 10 is a cavity, 11 is a first opening, 12 is a second opening,

[0021] 21 is a first elastic piece, 22 is a second elastic piece,

[0022] 3 is a U cup, 30 is a positioning cavity, 31 is a third opening, 32 is a limiting portion,

[0023] 4 is a first magnetic circuit component, 40 is a first magnetic circuit gap, 41 is an internal lower washer, 42 is an inner magnet, 43 is an internal upper washer;

[0024] 5 is a second magnetic circuit component, 50 is a second magnetic circuit gap, 51 is an annular lower washer, 52 is an annular magnet, 53 is an annular upper washer,

[0025] 61 is the first voice coil, and 62 is the second voice coil.

[0026] 71 is the card slot, and 72 is the support wall.

[0027] 81 is the first diaphragm, and 82 is the second diaphragm. Specific embodiments

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0029] It should be noted that if there are directional indications (such as up, down, left, right, front, back, top, bottom, inner, outer, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...) involved in the embodiments of the present invention, then the directional indications are only used to explain the relative position relationship and movement conditions between components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0030] In addition, if there are descriptions involving "first" or "second" in the embodiments of the present invention, then the descriptions of "first" or "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] As Figures 1 to 3 shown, a loudspeaker with a dual voice coil structure includes:

[0032] A bracket 1, where the bracket 1 is a cavity 10 with a first opening 11 and a second opening 12 provided at the upper and lower ends respectively;

[0033] Elastic pieces, there are two elastic pieces, namely a first elastic piece 21 provided on the upper inner wall of the cavity 10 and a second elastic piece 22 provided on the lower inner wall of the cavity 10;

[0034] A U-cup, the U-cup is provided with a positioning cavity 30, the upper end of the U-cup is connected to the first elastic piece 21, and the third opening 31 of the positioning cavity 30 is arranged opposite to the first opening 11;

[0035] The first magnetic circuit component 4 is disposed within the positioning cavity 30. A first magnetic circuit gap 40 is provided between the outer peripheral wall of the first magnetic circuit component 4 and the inner peripheral wall of the U cup. The first opening 11 is provided with a first vibrating plate, and a first voice coil 61 extending into the first magnetic circuit component 4 is provided on the lower wall of the first vibrating plate;

[0036] The second magnetic circuit component 5 is disposed between the first elastic sheet 21 and the second elastic sheet 22. The second magnetic circuit component 5 is disposed at the peripheral position of the U cup. A second magnetic circuit gap 50 is provided between the inner peripheral wall of the second magnetic circuit component 5 and the outer peripheral wall of the U cup.

[0037] The second opening 12 is provided with a second vibrating plate, and a second voice coil 62 extending into the second magnetic circuit gap 50 is provided on the upper wall of the second vibrating plate.

[0038] Through the arrangement of the double voice coils and the double elastic sheets, the first magnetic circuit component 4 and the second magnetic circuit component 5 can be respectively arranged at the inner peripheral position and the outer peripheral position of the U cup of the loudspeaker. Among them, the first voice coil 61 located at the inner periphery can be used to be responsible for the treble (accent), and the second voice coil 62 located at the outer periphery can be used to be responsible for the mid-bass, thereby improving the sound quality of the bone conduction earphone;

[0039] In actual control, the first voice coil 61 and the second voice coil 62 can work separately by independent driving, or a hybrid driving device can be used to achieve simultaneous or combined or intermittent work, thereby improving the sound quality.

[0040] Specifically, the bracket 1 is provided with a card slot, and the first elastic sheet 21 is embedded at the position of the card slot 72.

[0041] In the embodiment of the present utility model, the first elastic sheet 21 and the bracket 1 are integrally injection-molded, thereby realizing the installation of the first elastic sheet 21.

[0042] Specifically, a positioning portion protrudes from the lower part of the cavity 10, and a supporting wall 72 is formed on the lower wall of the positioning portion. The second elastic sheet 22 is installed on the supporting wall. In an actual embodiment, the installation positions of the first elastic sheet 21 and the second elastic sheet 22 can also both adopt the structure of the supporting wall, or one adopts the supporting wall and the other adopts the structure of integral injection molding, so as to meet different production requirements.

[0043] In the embodiment of the present utility model, the upper end of the U cup is provided with a horizontally extending limiting portion 32, and the lower wall of the limiting portion is connected to the upper wall of the first elastic sheet 21. In the production of the loudspeaker, the more commonly used method is glue bonding, which has simple production and good stability.

[0044] Specifically, both the first elastic piece 21 and the second elastic piece 22 are in a ring structure. The outer diameter of the first elastic piece 21 is larger than that of the second elastic piece 22. The size difference can be used to limit their vibration amplitude and vibration frequency, thereby ensuring the stability of the sound quality.

[0045] In a loudspeaker, it can be understood that the magnetic field of the magnetic circuit is constant. When the transducer outputs current to the voice coil, the magnetic energy generated by the voice coil is tangent to the magnetic field and then makes a predetermined vibration. Whether the amplitude and frequency of the vibration are consistent with the curve of the current output by the transducer is the key to whether the sound quality is distorted.

[0046] In the embodiment of the present invention, the first magnetic circuit component 4 (in a solid structure) includes an inner lower yoke 41 provided on the upper wall of the positioning cavity 30, an inner magnet 42 provided on the upper wall of the inner lower yoke 41, and an inner upper yoke 43 provided on the upper wall of the inner magnet 42. The inner magnet is in a solid structure, thereby realizing the high-frequency bandwidth.

[0047] Specifically, the second magnetic circuit component 5 includes an annular lower yoke 51 provided on the upper wall of the second elastic piece 22, an annular magnet 52 provided on the upper wall of the annular lower yoke 51, and an annular upper yoke 53 provided on the upper wall of the annular magnet 52. The upper wall of the annular upper yoke is connected to the first elastic piece 21, thereby realizing the mid-low frequency bandwidth.

[0048] In the embodiment of the present invention, the upper part of the annular upper yoke is bent, and is connected to the outer wall of the U cup 3 and extends to the lower wall position of the first elastic piece 21. That is, the second magnetic circuit component 5 is arranged between the first elastic piece 21 and the second elastic piece 22, so it has a wider vibration amplitude and vibration frequency, that is, better elasticity. In unit time, the vibration frequency of the second voice coil 62 is higher, and its amplitude will increase accordingly.

[0049] Specifically, the bracket 1, the first elastic piece 21, the second elastic piece 22, the first magnetic circuit component 4, and the second magnetic circuit component 5 are all coaxially arranged. The loudspeaker can be oval or circular; the first elastic piece 21, the second elastic piece 22, the first vibration plate, and the second vibration plate are made of non-magnetic materials.

[0050] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. All equivalent structural transformations made under the inventive concept of the present invention, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A loudspeaker with a dual voice coil structure, characterized in that Comprising: A bracket, the bracket being a cavity with a first opening and a second opening provided at the upper end and the lower end respectively; Elastic pieces, there are two elastic pieces, namely a first elastic piece provided on the upper part of the inner wall of the cavity and a second elastic piece provided on the lower part of the inner wall of the cavity; A U-cup, the U-cup being provided with a positioning cavity, the upper end of the U-cup being connected to the first elastic piece, and the third opening of the positioning cavity being arranged opposite to the first opening; A first magnetic circuit assembly, the first magnetic circuit assembly being arranged in the positioning cavity, a first magnetic circuit gap being provided between the outer peripheral wall of the first magnetic circuit assembly and the inner peripheral wall of the U-cup, the first opening being provided with a first vibrating plate, and a first voice coil extending from the lower wall of the first vibrating plate into the first magnetic circuit assembly; A second magnetic circuit assembly, the second magnetic circuit assembly being arranged between the first elastic piece and the second elastic piece, the second magnetic circuit assembly being arranged at the peripheral position of the U-cup, and a second magnetic circuit gap being provided between the inner peripheral wall of the second magnetic circuit assembly and the outer peripheral wall of the U-cup, The second opening being provided with a second vibrating plate, and a second voice coil extending from the upper wall of the second vibrating plate into the second magnetic circuit gap.

2. The loudspeaker with a dual voice coil structure according to claim 1, characterized in that: The bracket is provided with a clamping groove, and the first elastic piece is embedded at the position of the clamping groove.

3. The loudspeaker with a dual voice coil structure according to claim 1, characterized in that: The first elastic piece and the bracket are integrally injection-molded.

4. The loudspeaker with a dual voice coil structure according to claim 1, characterized in that: A positioning portion protrudes from the lower part of the cavity, a supporting wall is formed on the lower wall of the positioning portion, and the second elastic piece is mounted on the supporting wall.

5. The loudspeaker with the double voice coil structure according to claim 1, characterized in that: The upper end of the U-cup is provided with a horizontally extending limiting portion, and the lower wall of the limiting portion is connected to the upper wall of the first elastic piece.

6. The loudspeaker with a dual voice coil structure according to claim 1, characterized in that: Both the first elastic piece and the second elastic piece are in a ring structure, and the outer diameter of the first elastic piece is larger than the outer diameter of the second elastic piece.

7. The loudspeaker with a dual voice coil structure according to claim 1, characterized in that: The first magnetic circuit assembly includes an inner lower washer provided on the upper wall of the positioning cavity, an inner magnet provided on the upper wall of the inner lower washer, and an inner upper washer provided on the upper wall of the inner magnet.

8. The loudspeaker with a dual voice coil structure according to claim 1, characterized in that: The second magnetic circuit assembly includes an annular lower washer provided on the upper wall of the second elastic piece, an annular magnet provided on the upper wall of the annular lower washer, and an annular upper washer provided on the upper wall of the annular magnet, and the upper wall of the annular upper washer is connected to the first elastic piece.

9. The loudspeaker with a dual voice coil structure according to claim 8, characterized in that: The upper part of the annular upper washer is bent, and is connected to the outer wall of the U-cup and extends to the lower wall position of the first elastic piece.

10. The loudspeaker with a dual voice coil structure according to claim 1, wherein: The bracket, the first elastic piece, the second elastic piece, the first magnetic circuit assembly and the second magnetic circuit assembly are all coaxially arranged.

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