Lightweight circular truncated cone magnetic steel magnetic circuit

Abstract

The utility model relates to the technical field of loudspeakers, and discloses a light-weight circular truncated cone magnetic steel magnetic circuit, which comprises T iron, magnetic steel and a washer, the magnetic steel is circular truncated cone-shaped and is inserted on a pole core of the T iron, the magnetic steel is clamped between the washer and a flat plate of the T iron, and a conical circular truncated cone is formed at one end of the magnetic steel close to the flat plate; the outer diameter of the flat plate is smaller than the diameter of the small end of the conical truncated cone. By arranging the magnetic steel in a circular truncated cone shape, the surface area of the magnetic steel can be increased while the weight is not increased, so that the magnetic field performance is improved; the shape of the magnetic steel is changed, the outer diameter of the flat plate of the T iron is correspondingly reduced, the weight of the T iron can be reduced, the overall weight of the magnetic circuit is reduced, and the magnetic circuit is lighter.

Description

Technical Field

[0001] The utility model relates to the technical field of loudspeakers, in particular to a lightweight truncated cone magnetic steel magnetic circuit. Background Art

[0002] The magnetic circuit structure of the electric speaker includes T-iron, magnetic steel and washer. The existing conventional magnetic steel is in the shape of a ring, square or fan. The main problems are heavy weight and low efficiency. Figure 3 The figure shows a schematic diagram of the structure of a circular magnetic steel magnetic circuit. Utility Model Content

[0003] The purpose of the utility model is to provide a lightweight truncated cone magnetic steel magnetic circuit, which can increase the surface area of ​​the magnetic steel without increasing the weight by arranging the magnetic steel in a truncated cone shape, thereby improving the magnetic field performance;

[0004] The shape of the magnetic steel changes, and the outer diameter of the T-iron plate also becomes smaller accordingly, which can reduce the weight of the T-iron, thereby reducing the overall weight of the magnetic circuit, making the magnetic circuit lighter.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions:

[0006] A lightweight truncated cone magnetic steel magnetic circuit comprises a T-iron, a magnetic steel and a washer. The magnetic steel is truncated cone-shaped and is inserted on the pole core of the T-iron. The magnetic steel is clamped between the washer and the flat plate of the T-iron.

[0007] Through the above technical solution, the mass and thickness of the truncated cone-shaped magnetic steel are similar to those of conventional magnetic steel, but its inner diameter is relatively smaller, and the surface area of ​​the end surface in contact with the washer is greatly increased, thereby increasing the magnetic field performance and improving the product efficiency of the electric speaker. At the same time, since the outer diameter of the end in contact with the flat plate of the iron core is reduced, the outer diameter of the flat plate of the iron core is also reduced by the same magnitude, thereby reducing the mass of the T iron, thereby reducing the weight of the entire magnetic circuit, making it lighter.

[0008] The utility model is further configured as follows: a conical truncated cone is formed at one end of the magnetic steel close to the flat plate;

[0009] The outer diameter of the flat plate is smaller than the diameter of the small end of the conical truncated cone.

[0010] The utility model is further configured as follows: a heat dissipation through hole is formed in the middle of the pole core and runs through from top to bottom. By adding the heat dissipation through hole, the heat generated by the magnetic circuit can be discharged in time to ensure the normal operation of the voice coil, and the weight of the T iron can be further reduced.

[0011] The utility model is further configured as follows: a plurality of heat dissipation holes are formed on the outer wall of the pole core and communicate with the heat dissipation through hole. The heat dissipation holes can accelerate the introduction of heat from the outer side of the pole core into the heat dissipation through hole, further ensuring the timely discharge of heat.

[0012] The outstanding effects of the utility model are:

[0013] Compared with the prior art, by arranging the magnetic steel in a truncated cone shape, the surface area of ​​the magnetic steel can be increased without increasing the weight, thereby improving the magnetic field performance;

[0014] The shape of the magnetic steel changes, and the outer diameter of the T-iron plate also becomes smaller accordingly, which can reduce the weight of the T-iron, thereby reducing the overall weight of the magnetic circuit, making the magnetic circuit lighter. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the utility model after adding heat dissipation holes;

[0017] Figure 3 It is a structural schematic diagram of the magnetic circuit of the prior art;

[0018] Figure 4 This is a schematic diagram of B value detection of conventional magnetic steel;

[0019] Figure 5 Schematic diagram of B value detection of truncated cone magnet.

[0020] Reference numerals: 10, T iron; 101, pole core; 102, flat plate; 103, heat dissipation through hole; 104, heat dissipation small hole;

[0021] 20. Magnetic steel; 201. Conical frustum;

[0022] 30. Huasi. DETAILED DESCRIPTION

[0023] 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.

[0024] The following references Figures 1 to 5 The utility model is described as follows:

[0025] A lightweight truncated cone magnetic steel magnetic circuit comprises a T-iron 10, a magnetic steel 20 and a washer 30. The magnetic steel 20 is truncated cone-shaped and is inserted on the pole core 101 of the T-iron 10. The magnetic steel 20 is clamped between the washer 30 and the flat plate 102 of the T-iron 10. Preferably, a conical truncated cone 201 is formed at one end of the magnetic steel 20 close to the flat plate 102;

[0026] The outer diameter of the flat plate 102 is smaller than the diameter of the small end of the conical cone 201 .

[0027] Through the above technical solution, the mass and thickness of the truncated cone-shaped magnetic steel are similar to those of conventional magnetic steel, but its inner diameter is relatively smaller, and the surface area of ​​the end face in contact with the washer is greatly increased, thereby increasing the magnetic field performance and improving the product efficiency of the electric speaker. At the same time, since the outer diameter of the end in contact with the flat plate of the iron core is reduced, the outer diameter of the flat plate of the iron core is also reduced by the same magnitude, and the outer diameter of the pole core of the iron core is also reduced along with the inner diameter of the truncated cone-shaped magnetic steel, thereby greatly reducing the mass of the T iron, thereby greatly reducing the weight of the entire magnetic circuit, making it lighter.

[0028] A heat dissipation through hole 103 is formed in the middle of the pole core 101. By adding the heat dissipation through hole, the heat generated by the magnetic circuit can be discharged in time to ensure the normal operation of the voice coil.

[0029] The outer wall of the pole core 101 is formed with a plurality of heat dissipation holes 104 which are in communication with the heat dissipation through holes 103. The heat dissipation holes can accelerate the introduction of heat from the outer side of the pole core into the heat dissipation through holes, further ensuring the timely discharge of heat, and further reducing the weight of the T iron.

[0030] As shown in the examples, Figure 3 As shown in the figure, the existing conventional magnetic steel has an outer diameter of 120 mm, an inner diameter of 60 mm, and a thickness of 20 mm. The corresponding core plate outer diameter is 110 mm and the pole core outer diameter is 38 mm. Figure 4 As shown, the B value of conventional magnetic steel is 1.232;

[0031] As the instruction manual Figure 1 As shown. The outer diameter of the upper end of the truncated cone-shaped magnetic steel remains unchanged at 120 mm, and a 13 mm high conical cone is opened at the lower end. In order to ensure that the overall mass of the magnetic steel is roughly equal, the inner diameter of the magnetic steel is reduced to 45 mm, and the corresponding outer diameter of the core plate is reduced to 90 mm, and the outer diameter of the pole core remains unchanged at 38 mm, thereby greatly reducing the mass of the T iron and thus reducing the weight of the entire magnetic circuit. As shown in the attached manual Figure 5 As shown, the B value of the truncated cone magnet is 1.331. The B value increases by 8%. For electric speakers, the higher the B value, the higher the efficiency, thus providing higher efficiency for electric speakers.

[0032] 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 lightweight truncated cone magnetic steel magnetic circuit, comprising a T-iron (10), a magnetic steel (20) and a washer (30), characterized in that: The magnetic steel (20) is in a truncated cone shape and is inserted into the pole core (101) of the T-iron (10). The magnetic steel (20) is clamped between the washer (30) and the flat plate (102) of the T-iron (10).

2. A lightweight truncated cone magnetic steel magnetic circuit according to claim 1, characterized in that: A conical frustum (201) is formed at one end of the magnetic steel (20) close to the flat plate (102); The outer diameter of the flat plate (102) is smaller than the diameter of the small end of the conical cone (201).

3. The lightweight truncated cone magnetic steel magnetic circuit according to claim 1, characterized in that: A heat dissipation through hole (103) penetrating vertically is formed in the middle of the pole core (101).

4. The lightweight truncated cone magnetic steel magnetic circuit according to claim 3 is characterized in that: A plurality of heat dissipation holes (104) communicating with the heat dissipation through holes (103) are formed on the outer wall of the pole core (101).

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