Vibrating diaphragm for ribbon loudspeaker

Abstract

The invention discloses a vibrating diaphragm for a ribbon loudspeaker. The vibrating diaphragm comprises a plastic layer and a metal coating arranged on the plastic layer, the metal coatings are divided into a plurality of strips along the longitudinal direction, the directions of current passing through the metal coatings are consistent, the vibrating diaphragm is arranged between two magnets of which the magnetic poles are transversely arranged, and the magnetic pole arrangement directions of the two magnets are the same; according to the vibrating diaphragm for the belt type loudspeaker, the metal coating adopts a multi-section segmentation structure, the area of the vibrating diaphragm is similar after the metal layer is segmented, the magnetic field intensity generated under the condition that the length of a conductor passing through the same current is multiplied by the length of the conductor before segmentation, and the area is basically the same, so that the efficiency is higher; the magnetic field is more uniform than before segmentation, so that the diaphragm can be wider than before segmentation.

Description

Technical Field

[0001] The present invention relates to the technical field of loudspeakers, and in particular to a diaphragm for a ribbon loudspeaker. Background Art

[0002] A loudspeaker is a transducer device that converts electrical signals into acoustic signals. The performance of a loudspeaker has a great impact on the sound quality. The loudspeaker is the weakest device in an audio device, but it is also the most important component for the sound effect. The audio energy vibrates the cone or diaphragm through electromagnetic, piezoelectric or electrostatic effects and resonates with the surrounding air to produce sound. At present, the diaphragm in the ribbon speaker has no effective auxiliary design for the current magnetic field, and thus has the defect of low magnetic field strength. Summary of the invention

[0003] The purpose of the present invention is to provide a diaphragm for a ribbon speaker to solve the problems existing in the above-mentioned prior art, to increase the magnetic field, to make the speaker more efficient, to have a higher volume under the same driving power, and to have better control, and good control means good sound quality.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides a diaphragm for a ribbon loudspeaker, the diaphragm comprising a plastic layer and a metal coating arranged on the plastic layer; the metal coating is divided into a plurality of strips along the longitudinal direction, the direction of current passing through each of the metal coatings is the same, the diaphragm is arranged between two magnets with transversely arranged magnetic poles, and the magnetic poles of the two magnets are arranged in the same direction.

[0006] Preferably, the magnet and the diaphragm are both arranged on the top of a base.

[0007] Preferably, the metal coatings are connected to each other via an external circuit or a circuit board, the metal coatings are connected in series or in parallel, and the direction of the current passing through each metal coating is consistent.

[0008] Preferably, the plastic layer is a thermoplastic film.

[0009] Compared with the prior art, the present invention has achieved the following beneficial technical effects:

[0010] The diaphragm for the ribbon speaker provided by the present invention has a metal plating layer with a multi-section split structure. The electromagnetic strength of the conductor is mainly determined by the current passing through the conductor. The conductor length in the approximately equal area after the split is longer, so the magnetic field generated after the same current passes through is stronger and more even than before. The stronger magnetic field strength and the interaction force between the magnets arranged on both sides are stronger, so that the efficiency of the speaker is higher. High efficiency means that the volume is higher and the control is better under the same driving force. Good control means good sound quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 It is a schematic diagram of the structure of the diaphragm for the ribbon speaker of the present invention;

[0013] In the figure: 1. Diaphragm; 2. Magnet; 3. Base. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] The object of the present invention is to provide a diaphragm for a ribbon loudspeaker to solve the problems existing in the prior art.

[0016] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] The ribbon speaker in this embodiment uses a diaphragm such as Figure 1 As shown, the diaphragm 1 includes a plastic layer and a metal coating arranged on the plastic layer; the metal coating is divided into multiple strips along the longitudinal direction, the total area of ​​the metal coating after division is similar to the area before division, the direction of the current passing through each metal coating is consistent, and the diaphragm 1 is arranged between two magnets 2 with horizontally arranged magnetic poles, and the magnetic poles of the two magnets 2 are arranged in the same direction.

[0018] In this specific embodiment, the magnet 2 and the diaphragm 1 are both disposed on the top of a base 3 .

[0019] In this specific embodiment, each metal coating is connected through an external circuit or a circuit board, and each metal coating is connected in series or in parallel. Regardless of which connection method is selected, the ultimate goal is to make the currents between each metal coating be in the same direction.

[0020] In this specific embodiment, the metal coating 1 is a single-layer or multi-layer copper layer or nickel layer, and may also be an inner layer plated with copper and an outer layer plated with silver, or only silver or aluminum. The inner layer has high electrical conductivity and the outer layer is corrosion-resistant and oxidation-resistant; the plastic layer is a thermoplastic film, such as a polymer PET layer or a PI layer.

[0021] The diaphragm for the ribbon speaker of the present invention has a plurality of separate metal coatings at the end of the diaphragm, so that the current direction between each section is the same; for example, a 5x10 cm conductor with a thickness of 1 micron is electrified and a conductor with the same thickness of 1x10 cm is electrified and the same voltage and current are passed through the two ends of 5 conductors with the same thickness of 1x10 cm. To compare the magnetic field strength and other differences generated by the conductor with the same thickness of 5x10 cm and the conductor with the same thickness of 1 micron and 5 conductors with the same thickness of 1x10 cm after the same voltage and current are passed, we can use Ampere's law and Biot-Savart law as theoretical basis. However, the specific calculation will depend on the specific conductor layout and configuration.

[0022] Ampere's law states that electric current generates a magnetic field whose strength depends on the total current flowing through the conductors. If we assume that the current in each conductor is the same, then the total current in five conductors will be five times that of one conductor.

[0023] The Biot-Savart law describes the relationship between the strength of the magnetic field generated at a specific point in space and the current component. Based on this law, we can analyze the contribution of the current to the magnetic field generated at a certain point. Generally speaking, the stronger the current and the closer the distance, the stronger the magnetic field.

[0024] For a 5x10 cm conductor of 1 micron thickness, the current density across the entire surface is lower because the current is spread over a larger area. For 5 1x10 cm conductors, the current density in each conductor is higher because the same current is spread over a smaller area. Therefore, if each small conductor has the same current and is placed in parallel and close together, the magnetic fields they produce will add up to each other, giving a stronger total magnetic field.

[0025] The result is that after the split, the resistance will increase compared to before the split, the requirements for the amplification equipment will be reduced, the efficiency will be higher, and the diaphragm width can be wider than before the split.

[0026] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A diaphragm for a ribbon speaker, characterized in that: The diaphragm includes a plastic layer and a metal coating arranged on the plastic layer; the metal coating is divided into multiple strips along the longitudinal direction, and the direction of the current passing through each strip of the metal coating is the same. The diaphragm is arranged between two magnets with horizontally arranged magnetic poles, and the magnetic poles of the two magnets are arranged in the same direction.

2. The diaphragm for a ribbon speaker according to claim 1, characterized in that: The magnet and the diaphragm are both arranged on the top of a base.

3. The diaphragm for a ribbon speaker according to claim 2, characterized in that: The metal coatings are connected to each other via an external circuit or a circuit board, and the metal coatings are connected in series or in parallel, and the direction of the current passing through the metal coatings is consistent.

4. The diaphragm for a ribbon speaker according to claim 1, characterized in that: The plastic layer is a thermoplastic film.

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