Novel magnetic circuit structure of loudspeaker

Abstract

The utility model relates to the technical field of loudspeakers, and discloses a novel magnetic circuit structure of a loudspeaker, which comprises T iron, magnetic steel and a washer, and a pole core of the T iron is coaxially inserted in the middle of the magnetic steel and the washer; a heat dissipation ring is fixed on the pole core; and an aluminum ring is attached to the outer side of the pole core. By sleeving the pole core with the aluminum ring, the magnetic field distribution at the magnetic gap is more uniform, and the more uniform the magnetic field distribution is, the smaller the distortion caused by the vibration of the voice coil is, so that the problem of large sound distortion is solved; according to the loudspeaker, the radiating ring is arranged on the pole core, so that most of heat generated by the movement of the voice coil can be discharged from the radiating ring, the power value of the finished loudspeaker is further increased, and the risk of burning out the voice coil is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of loudspeakers, in particular to a new magnetic circuit structure of a loudspeaker. Background Art

[0002] The magnetic circuit structure of the existing electrodynamic speaker is as shown in the attached manual. Figure 5 The speaker includes a T-iron 10, a magnetic steel 20 and a washer 30 which are coaxially fixedly connected. When the speaker is working, the voice coil cuts the magnetic lines of force and generates heat. When a certain power is reached, the temperature of the voice coil rises sharply. In the case of a conventional magnetic circuit design, the heat is dissipated through the T-iron, magnetic steel and washer components. Due to material defects, the heat cannot be dissipated in time, which easily causes the voice coil temperature to be too high and burn out (open circuit). At the same time, the existing magnetic circuit structure causes the voice coil to be distorted when vibrating, and the sound distortion transmitted to the sound basin increases. Utility Model Content

[0003] The utility model aims to provide a novel magnetic circuit structure of a loudspeaker, which solves the problems of easy burning of the voice coil and large sound distortion.

[0004] The above technical objectives of the utility model are achieved through the following technical solutions:

[0005] A novel loudspeaker magnetic circuit structure comprises a T-iron, a magnetic steel and a washer, wherein the pole core of the T-iron is coaxially inserted in the middle of the magnetic steel and the washer; a heat dissipation ring is fixed on the pole core; and an aluminum ring is attached to the outer side of the pole core.

[0006] The heat generated by the voice coil is transferred to the heat dissipation coil through the pole core, which can speed up the heat dissipation;

[0007] By setting an aluminum ring on the outside of the pole core, the magnetic field distribution of the magnetic gap can be made more uniform. The more uniform the magnetic field distribution is, the less distortion caused by the vibration of the voice coil.

[0008] The utility model is further configured as follows: a through hole is formed in the middle of the pole core and runs axially therethrough;

[0009] The heat dissipation ring includes an integrally formed annular portion and a hollow tube body portion; the hollow tube body portion is inserted into the through hole and the outer wall of the hollow tube body portion is abutted against the inner wall of the through hole; the arc portion is abutted against the upper end surface of the pole core and the two are fixedly connected by screws.

[0010] The contact area between the heat dissipation ring and the pole core can be increased by providing the circular ring portion and the hollow tube body portion, thereby improving the heat conduction effect.

[0011] The utility model is further configured as follows: a plurality of radiating fins evenly distributed around the circumference are formed on the inner wall of the hollow tube body, and the heat dissipation efficiency can be further improved by the radiating fins.

[0012] The utility model is further configured as follows: the aluminum ring includes a plurality of arc-shaped bearing bushes, and the bearing bushes are fixed to the outer wall of the pole core by screws;

[0013] The outer wall of the upper end of the pole core is formed with a convex ring, and the outer wall of the bearing bush is not higher than the outer wall of the convex ring;

[0014] The outer wall of the convex ring and the inner wall of the washer form an annular channel for the voice coil to move.

[0015] The number of the bearing bushes is at least two, and the plurality of bearing bushes can facilitate the installation of the bearing bushes.

[0016] The utility model is further configured that: the material of the heat dissipation ring is aluminum. A heat sink made of aluminum material dissipates heat faster.

[0017] The outstanding effects of the utility model are:

[0018] Compared with the prior art, by connecting an aluminum ring outside the pole core, the magnetic field distribution at the magnetic gap can be made more uniform. The more uniform the magnetic field distribution is, the less distortion will be caused by the vibration of the voice coil, thus solving the problem of large sound distortion.

[0019] By setting a heat sink on the pole core, most of the heat generated by the movement of the voice coil can be discharged from the heat sink, thereby increasing the power value of the finished speaker and reducing the risk of burning out the voice coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an explosion diagram of the utility model;

[0021] Figure 2 It is a top view of the utility model;

[0022] Figure 3 for Figure 2 About the cross-sectional view of AA;

[0023] Figure 4 for Figure 3 A partial enlarged view of B;

[0024] Figure 5 A schematic diagram of a magnetic circuit structure of the prior art;

[0025] Figure 6 A magnetic field distribution diagram of a magnetic circuit simulation of the utility model;

[0026] Figure 7 for Figure 6 A partial enlarged view of the magnetic gap;

[0027] Figure 8 A magnetic field distribution diagram of a magnetic circuit simulation of a magnetic circuit structure of the prior art;

[0028] Fig. 9 for Figure 8 A partial enlarged view of the magnetic gap part.

[0029] Reference numerals: 10, T iron; 101, pole core; 102, through hole;

[0030] 20. Magnetic steel;

[0031] 30. Huasi;

[0032] 40, heat dissipation ring; 401, annular portion; 402, hollow tube portion; 403, heat dissipation fins;

[0033] 50, aluminum ring; 501, bearing shell;

[0034] 60. Voice coil. DETAILED DESCRIPTION

[0035] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0036] The following references Figures 1 to 5 The utility model is described as follows:

[0037] A novel loudspeaker magnetic circuit structure includes a T-iron 10, a magnetic steel 20 and a washer 30. The pole core 101 of the T-iron 10 is coaxially inserted in the middle of the magnetic steel 20 and the washer 30. A heat dissipation ring 40 is fixed on the pole core 101. An aluminum ring 50 is attached to the outer side of the pole core 101.

[0038] The heat generated by the voice coil is transferred to the heat dissipation coil through the pole core, which can speed up the heat dissipation;

[0039] By setting an aluminum ring on the outside of the pole core, the magnetic field distribution of the magnetic gap can be made more uniform. The more uniform the magnetic field distribution is, the less distortion caused by the vibration of the voice coil.

[0040] A through hole 102 is formed in the middle of the pole core 101 and runs axially therethrough;

[0041] The heat dissipation ring 40 includes an integrally formed annular portion 401 and a hollow tube body portion 402; the hollow tube body portion 402 is inserted into the through hole 102 and the outer wall of the hollow tube body portion 402 is in contact with the inner wall of the through hole 102; the arc portion 401 is in contact with the upper end surface of the pole core 101 and the two are fixedly connected by screws.

[0042] The contact area between the heat dissipation ring and the pole core can be increased by providing the circular ring portion and the hollow tube body portion, thereby improving the heat conduction effect.

[0043] A plurality of heat dissipation fins 403 evenly distributed around the circumference are formed on the inner wall of the hollow tube body 402. The heat dissipation efficiency can be further improved by the heat dissipation fins.

[0044] The aluminum ring 50 includes a plurality of arc-shaped bearing bushes 501, and the bearing bushes 501 are fixed to the outer wall of the pole core 101 by screws;

[0045] The upper outer wall of the pole core 101 is formed with a convex ring 103, and the outer wall of the bearing bush 501 is not higher than the outer wall of the convex ring 103;

[0046] The outer wall of the convex ring 103 and the inner wall of the washer 30 form an annular channel for the voice coil to move.

[0047] There are at least two bearing bushes 501. There are multiple bearing bushes to facilitate the installation of the bearing bushes.

[0048] The heat sink 40 is made of aluminum. Aluminum heat sinks dissipate heat faster.

[0049] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications of the above assumptions should also be regarded as the protection scope of the present invention.

Claims

1. A novel loudspeaker magnetic circuit structure, comprising a T-iron (10), a magnetic steel (20) and a washer (30), wherein a pole core (101) of the T-iron (10) is coaxially inserted into the middle of the magnetic steel (20) and the washer (30); the characteristics are: A heat dissipation ring (40) is fixed on the pole core (101); and an aluminum ring (50) is attached to the outer side of the pole core (101).

2. The novel loudspeaker magnetic circuit structure according to claim 1, characterized in that: A through hole (102) extending axially through the middle of the pole core (101); The heat dissipation ring (40) comprises an integrally formed annular portion (401) and a hollow tube portion (402); the hollow tube portion (402) is inserted into the through hole (102) and the outer wall of the hollow tube portion (402) is in contact with the inner wall of the through hole (102); the annular portion (401) is in contact with the upper end surface of the pole core (101) and the two are fixedly connected by screws.

3. The novel loudspeaker magnetic circuit structure according to claim 2, characterized in that: A plurality of heat dissipation fins (403) evenly distributed around the circumference are formed on the inner wall of the hollow tube body (402).

4. The novel loudspeaker magnetic circuit structure according to claim 1, characterized in that: The aluminum ring (50) comprises a plurality of arc-shaped bearing bushes (501), and the bearing bushes (501) are fixed to the outer wall of the pole core (101) by means of screws; The outer wall of the upper end of the pole core (101) is formed with a convex ring (103), and the outer wall of the bearing bush (501) is not higher than the outer wall of the convex ring (103); The outer wall of the convex ring (103) and the inner wall of the washer (30) form an annular channel for the voice coil to move.

5. The novel loudspeaker magnetic circuit structure according to claim 4, characterized in that: The number of the bearing shells (501) is at least two.

6. The novel loudspeaker magnetic circuit structure according to claim 1, characterized in that: The heat dissipation ring (40) is made of aluminum.

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