Copper sheet voice coil loudspeaker

Abstract

The utility model relates to a copper sheet voice coil loudspeaker, which comprises a U-shaped iron, a magnet, a magnetic core, a copper sheet voice coil, a vibrating diaphragm and a top plate, the opening of the U-shaped iron is arranged upwards, the magnet is arranged on the inner side of the U-shaped iron, the magnetic core is arranged above the magnet, the copper sheet voice coil is arranged on the inner side of the U-shaped iron and surrounds the magnet and the magnetic core, the vibrating diaphragm is arranged above the voice coil and is attached to the upper surface of the voice coil, and the top plate is arranged on the top plate. The top plate is arranged at the center of the upper surface of the vibrating diaphragm, the copper sheet voice coil is used as a current conductor, the copper sheet voice coil is located in a magnetic gap (two sides between a magnet and a magnetic core), the magnetic force drives the copper sheet voice coil to vibrate after alternating current is supplied, so that the vibrating diaphragm is driven to move, the vibrating diaphragm pushes air to generate sound transmission, and the resistance value of the copper sheet voice coil is low (less than 0.1 omega). The loudspeaker can be used for low-power sound production, and the heat dissipation problem which cannot be solved by high power is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of audio technology, specifically relating to a copper sheet voice coil loudspeaker. Background Technology

[0002] Currently, a voice coil loudspeaker is an electroacoustic transducer that converts electrical signals into sound signals. Its working principle is based on electromagnetic induction and vibration-based sound generation, specifically as follows: When an audio current passes through the voice coil, the voice coil vibrates under the influence of the Ampere force in the magnetic field. The vibration of the voice coil is transmitted to the surrounding air through the diaphragm, causing the air to vibrate and generate sound waves, thus realizing the conversion of electrical signals into sound signals. Existing voice coils use enameled wire, which easily generates high heat during high-power sound generation, requiring a heat dissipation structure; otherwise, the loudspeaker will quickly be damaged. To solve this problem, this solution was developed. Utility Model Content

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a copper sheet voice coil loudspeaker, which uses a copper sheet voice coil instead of an enameled wire voice coil. The copper sheet can produce sound at low power and will not cause heat dissipation problems.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a copper sheet voice coil loudspeaker, including a U-shaped iron, a magnet, a magnetic core, a copper sheet voice coil, a diaphragm, and a top plate. The U-shaped iron is arranged with its opening facing upward. The magnet is arranged inside the U-shaped iron. The magnetic core is arranged above the magnet. The copper sheet voice coil is arranged inside the U-shaped iron and surrounds the magnet and the outer periphery of the magnetic core. The diaphragm is arranged above the voice coil and is attached to the upper surface of the voice coil. The top plate is arranged at the center of the upper surface of the diaphragm.

[0005] Furthermore, the copper sheet voice coil loudspeaker also includes a base, with a through hole at the center of the base. The U-shaped iron, magnet, and magnetic core are located inside the through hole, with the outer periphery of the U-shaped iron adapted to the through hole and the lower end of the U-shaped iron extending out of the through hole.

[0006] Furthermore, the diaphragm is annular and includes a first connecting portion, an arc-shaped protrusion, and a second connecting portion. The first connecting portion, the arc-shaped protrusion, and the second connecting portion are connected sequentially from the outside to the inside. The first connecting portion is connected to the base, and the second connecting portion is connected to the upper surface of the voice coil.

[0007] Furthermore, the horizontal projection shape of the base is square, and the diaphragm is square-shaped.

[0008] Furthermore, a boss is formed on the bottom inner side of the U-shaped iron, and the magnet is disposed on the upper surface of the boss.

[0009] Furthermore, the upper surface of the protrusion is provided with spaced strip-shaped holes.

[0010] Furthermore, an annular notch is provided at the position corresponding to the arc-shaped protrusion on the base.

[0011] Furthermore, a raised ring is formed on the upper surface of the inner side of the notch, and the height of the raised ring is lower than the height of the upper surface of the base.

[0012] Furthermore, a winding coil is provided between the convex ring and the notch, the winding coil is electrically connected to the voice coil, and the winding coil is connected to an external power source.

[0013] Furthermore, a magnetic block is provided between the convex ring and the notch.

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

[0015] This invention provides a copper voice coil loudspeaker, which uses a copper voice coil as a current conductor. The copper voice coil is located in the magnetic gap (on both sides between the magnet and the magnetic core). When alternating current is applied, the magnetic force drives the copper voice coil to vibrate, thereby driving the diaphragm to move. The diaphragm pushes the air to generate sound. Since the copper voice coil has a low resistance (<0.1Ω), it can be used for low-power sound generation, avoiding the heat dissipation problem that cannot be solved for high-power applications. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of a copper sheet voice coil loudspeaker according to the present invention;

[0017] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 3 This is a three-dimensional structural diagram of the present invention from another angle;

[0019] Figure 4 This is the impedance-frequency curve of the copper sheet voice coil used as the current conductor in this utility model.

[0020] The markings in the diagram are: 1. Base; 11. Notch; 12. Raised ring; 2. U-shaped iron; 21. Boss; 211. Strip hole; 3. Magnet; 4. Magnetic core; 5. Copper sheet voice coil; 6. Diaphragm; 61. First connecting part; 62. Arc-shaped protrusion; 63. Second connecting part; 7. Top plate; 8. Wrapping coil. Detailed Implementation

[0021] To make the above-mentioned features and advantages of this utility model more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings for detailed explanation.

[0022] like Figures 1-4As shown, this embodiment provides a copper sheet voice coil 5 loudspeaker, including a base 1, a U-shaped iron 2, a magnet 3, a magnetic core 4, a copper sheet voice coil 5, a diaphragm 6, and a top plate 7.

[0023] The base 1 has a square shape in its horizontal projection. A through hole is located at the center of the base 1, and an annular notch 11 is formed near the through hole. A raised ring 12 is formed on the upper surface of the inner side of the notch 11, and the height of the raised ring 12 is lower than the height of the upper surface of the base 1. The U-shaped iron 2, the magnet 3, and the magnetic core 4 are located within the through hole. The outer periphery of the U-shaped iron 2 is adapted to the through hole, and the lower end of the U-shaped iron 2 extends out of the through hole. Specifically, a boss 21 is formed on the inner bottom of the U-shaped iron 2. The magnet 3 is disposed on the upper surface of the boss 21. The upper surface of the boss 21 has spaced-apart strip-shaped holes 211. The arrangement of the strip-shaped holes 211 can optimize the magnetic field distribution, reduce vibration and noise, and increase magnetic flux.

[0024] The magnetic core 4 is positioned above the magnet 3. The copper voice coil 5 is positioned inside the U-shaped iron 2 and surrounds the magnet 3 and the magnetic core 4. The diaphragm 6 is positioned above the voice coil and is attached to the upper surface of the voice coil and the base 1. Specifically, the diaphragm 6 is square-ringed and includes a first connecting portion, an arc-shaped protrusion 61, a first connecting portion 62, and a second connecting portion 63. The first connecting portion, the arc-shaped protrusion 61, the first connecting portion 62, and the second connecting portion 63 are connected sequentially from the outside to the inside. The first connecting portion is connected to the base 1, and the second connecting portion 63 is connected to the upper surface of the voice coil. The top plate 7 is positioned at the center of the upper surface of the diaphragm 6.

[0025] Preferably, the arc-shaped protrusion 61 is the first connecting part; 62 corresponds to the notch 11. The above arrangement can optimize the vibration space and prevent collisions between components (between the diaphragm 6 and the base 1). The area formed by the notch 11 and the protruding ring 12 can form a resonant cavity or acoustic cavity to optimize sound propagation.

[0026] A winding coil 8 is provided between the convex ring 12 and the notch 11. The winding coil 8 is electrically connected to the voice coil and is connected to an external power source. Specifically, a terminal is provided on the outer wall of the base 1. The terminal is connected to the winding coil 8 and is used to energize the external power source.

[0027] Preferably, a magnetic block is provided between the convex ring 12 and the notch 11. The addition of a magnetic block between the convex ring 12 and the notch 11 can improve the magnetic field strength, optimize the magnetic circuit balance, and suppress distortion.

[0028] The impedance-frequency curve of the copper voice coil 5 as the current conductor is shown in the figure. The horizontal axis is Hertz (Hz) and the vertical axis is impedance (dBV). The impedance (dBV) is the decibel value with 1 volt (V) as the reference voltage.

[0029] This design uses a copper voice coil 5 as the current conductor. The copper voice coil 5 is located in the magnetic gap (on both sides between the magnet 3 and the magnetic core 4). When alternating current is applied, the magnetic force drives the copper voice coil 5 to vibrate, which in turn drives the diaphragm 6 to move. The diaphragm 6 pushes the air to generate sound. Since the copper voice coil 5 has a low resistance (<0.1Ω), it can be used for low-power sound generation, avoiding the heat dissipation problem that cannot be solved for high-power applications.

[0030] The foregoing has shown and described the basic principles and main features of this invention, as well as its advantages. Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this invention. Various changes and modifications can be made to this invention without departing from its spirit and scope. All such changes and modifications fall within the scope of this invention as defined by the appended claims and their equivalents.

Claims

1. A copper sheet voice coil loudspeaker, characterized in that: It includes a U-shaped iron, a magnet, a magnetic core, a copper voice coil, a diaphragm, and a top plate. The U-shaped iron is positioned with its opening facing upwards. The magnet is positioned inside the U-shaped iron. The magnetic core is positioned above the magnet. The copper voice coil is positioned inside the U-shaped iron and surrounds the magnet and the outer periphery of the magnetic core. The diaphragm is positioned above the voice coil and is attached to the upper surface of the voice coil. The top plate is positioned at the center of the upper surface of the diaphragm.

2. A copper sheet voice coil loudspeaker according to claim 1, characterized in that: The copper sheet voice coil loudspeaker also includes a base with a through hole at the center. The U-shaped iron, magnet, and magnetic core are located inside the through hole. The outer periphery of the U-shaped iron is adapted to the through hole, and the lower end of the U-shaped iron extends out of the through hole.

3. A copper sheet voice coil loudspeaker according to claim 2, characterized in that: The diaphragm is annular and includes a first connecting part, an arc-shaped protrusion, and a second connecting part. The first connecting part, the arc-shaped protrusion, and the second connecting part are connected sequentially from the outside to the inside. The first connecting part is connected to the base, and the second connecting part is connected to the upper surface of the voice coil.

4. A copper sheet voice coil loudspeaker according to claim 2, characterized in that: The base has a square shape when projected onto the horizontal plane, and the diaphragm is a square ring shape.

5. A copper sheet voice coil loudspeaker according to claim 1, characterized in that: A boss is formed on the bottom inner side of the U-shaped iron, and the magnet is disposed on the upper surface of the boss.

6. A copper sheet voice coil loudspeaker according to claim 5, characterized in that: The upper surface of the boss is provided with spaced-apart strip holes.

7. A copper sheet voice coil loudspeaker according to claim 3, characterized in that: The base has an annular notch at the position corresponding to the arc-shaped protrusion.

8. A copper sheet voice coil loudspeaker according to claim 7, characterized in that: A raised ring is formed on the upper surface of the inner side of the notch, and the height of the raised ring is lower than the height of the upper surface of the base.

9. A copper sheet voice coil loudspeaker according to claim 8, characterized in that: A winding coil is disposed between the convex ring and the notch. The winding coil is electrically connected to the voice coil and is connected to an external power source.

10. A copper sheet voice coil loudspeaker according to claim 8, characterized in that: A magnetic block is provided between the convex ring and the notch.

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