WO2021026951A1

WO2021026951A1 - Voice coil and diaphragm assembly

Info

Publication number: WO2021026951A1
Application number: PCT/CN2019/101744
Authority: WO
Inventors: 陈林
Original assignee: 陈林
Priority date: 2019-08-12
Filing date: 2019-08-21
Publication date: 2021-02-18
Also published as: CN110290448A

Abstract

Disclosed is a voice coil and a diaphragm assembly, comprising a voice coil and a diaphragm. The diaphragm is formed by a lightweight rigid outer layer, a lightweight rigid interlayer, and a lightweight rigid inner layer being composited in sequence. An inner side end surface of the diaphragm is provided with a slot into which the voice coil may be inserted; the slot penetrates the lightweight rigid inner layer and the lightweight rigid interlayer of the diaphragm to reach the lightweight rigid outer layer; after the voice coil is inserted into the slot, the voice call directly abuts against the lightweight rigid outer layer of the diaphragm. The voice coil of the present invention penetrates the lightweight rigid inner layer and the lightweight rigid interlayer of the diaphragm and then directly abuts against the lightweight rigid outer layer, which enables the voice coil to form an embedded-type rigid connection after penetrating the diaphragm. Regardless of the multiple layers or the thickness of the diaphragm, the voice coil and each layer of a rigid body of the diaphragm forming a rigid connection can be guaranteed so that the structure moves as a whole and vibrates synchronously without the problems of buffering or inconsistent movement. When the structure vibrates at high speeds, the air is effectively pushed to thereby significantly reduce distortion, and thus sound quality is good.

Description

Voice coil and diaphragm assembly

Technical field

The invention relates to the technical field of horn equipment, and more specifically to a voice coil and diaphragm assembly.

Background technique

The voice coil and the diaphragm are two important components of the horn. The input sine wave current of the voice coil is converted from the coil into a changing magnetic field, which generates a changing sound source driving force in the magnetic field to push the diaphragm, and the diaphragm vibrates to produce sound. Therefore, once the rigidity of the diaphragm is insufficient, it will deform under the action of the driving force of the sound source, and the deformation will cause serious segmentation distortion.

In order to improve the rigidity of the diaphragm, a sandwich structure diaphragm is introduced on the market. This diaphragm is composed of a light rigid outer layer, a light rigid interlayer and a light rigid inner layer in sequence. Under the same rigidity, This sandwich structure diaphragm has the lightest weight.

The traditional sandwich diaphragm horn is to bond the voice coil to the light rigid inner layer of the diaphragm through the horn center glue. Due to the multilayer rigid body composite sandwich structure diaphragm, the transmission force is gradually weakened, which will make the transmission force Produce cushioning effect (the material of each layer is different due to physical properties such as rigidity and toughness), and then make the movement of the light rigid outer layer, light rigid interlayer and light rigid inner layer inconsistent, and the diaphragm cannot be realized as a whole Vibration, which is also prone to segmentation distortion, the sound is very muddy, and the sound quality is poor.

Summary of the invention

The purpose of the present invention is to overcome the above shortcomings of the prior art, and provide a method that can ensure that the voice coil and each layer of the rigid body of the diaphragm form a rigid connection, no matter how thick or thick the diaphragm is, without buffering or movement. The problem of inconsistency, the voice coil and diaphragm components that effectively reduce distortion and improve sound quality.

In order to achieve the above objectives, the present invention is achieved through the following technical solutions: a voice coil and diaphragm assembly, including a voice coil and a diaphragm, the diaphragm is composed of a lightweight rigid outer layer, a lightweight rigid interlayer and a lightweight rigid The inner layer is sequentially compounded, and it is characterized in that a slot that allows the voice coil to be inserted is provided on the inner end surface of the diaphragm, and the slot penetrates the light and rigid inner layer and the light rigidity of the diaphragm. The interlayer reaches the light rigid outer layer, and the voice coil is inserted into the slot and directly abuts the light rigid outer layer of the diaphragm.

The voice coil of the present invention penetrates the light rigid inner layer and the light rigid interlayer of the diaphragm and then directly reaches the light rigid outer layer, so that the voice coil forms an embedded rigid connection after penetrating the diaphragm, no matter how thick the diaphragm is. It can ensure that the voice coil and each layer of the rigid body of the diaphragm are rigidly connected to make it move as a whole and vibrate synchronously, without buffering or inconsistent movement. It can effectively push the air during high-speed vibration, thereby significantly reducing distortion , The sound quality is good.

Preferably, the lightweight rigid outer layer is a carbon fiber outer layer, the lightweight rigid interlayer is a PMI foam interlayer, and the lightweight rigid inner layer is a carbon fiber inner layer.

Carbon fiber, a high-strength and high-modulus fiber with a carbon content of more than 90%, has high strength and modulus along the fiber axis due to its graphite crystallite structure preferentially oriented along the fiber axis, and has high temperature resistance, friction resistance, Electrical conductivity, thermal conductivity and corrosion resistance are fibrous, soft, and can be processed into various fabrics.

PMI foam, namely polymethacrylimide foam, is a closed-cell, rigid and rigid foam obtained by foaming a copolymer of methacrylic acid (MAA) and methacrylonitrile (MAN) at a foaming temperature of 180-230℃ Quality foam. While foaming at high temperature, the adjacent cyano group (-CN) and carboxyl group (-COOH) in the MAA-MAN copolymer undergo a nucleophilic addition reaction to form a cyclic imide structure, which is highly polar and High rigidity gives PMI foam material a good comprehensive performance.

The light weight, high rigidity and polarity of carbon fiber and PMI foam meet the requirements of making sandwich structure diaphragm. PMI foam is used as the sandwich layer, and carbon fiber is used as the two side layers. While reducing the weight, it ensures the rigidity of the diaphragm and makes it difficult for the diaphragm. Deformation during high-speed vibrations eliminates the problem of segmentation distortion after deformation.

Preferably, the wall thickness of the PMI foam interlayer is greater than the carbon fiber outer layer and the carbon fiber inner layer, and the carbon fiber outer layer and the carbon fiber inner layer have the same wall thickness.

PMI is lighter than carbon fiber, but the rigid body is not as good as carbon fiber. Therefore, a PMI foam interlayer with a wall thickness greater than the two is sandwiched between the outer carbon fiber layer and the inner carbon fiber layer. The original intention is to reduce the weight and increase the thickness of the diaphragm, which means to increase the overall vibration. Membrane rigidity.

Preferably, the voice coil and the diaphragm are an integrated connection structure. More specifically, the portions where the voice coil and the light rigid inner layer, the light rigid interlayer and the light rigid outer layer of the diaphragm are in contact are all integrated Connection structure.

The parts where the voice coil and the light rigid inner layer of the diaphragm, the light rigid interlayer and the light rigid outer layer are in contact are all integrated connection structures to ensure that the voice coil and each layer of the diaphragm form a rigid connection. Make it move as a whole and vibrate synchronously, without buffering or inconsistent movement.

Preferably, the slot width of the slot is greater than the wall thickness of the voice coil, the slot is filled with speaker center glue, more specifically, the gap between the voice coil inserted into the slot and the slot is filled with a speaker Center glue.

There are many types of speaker center glue. There are special glues for speakers in Baidu Library. The types and uses of the center glue are introduced in detail. The official website of the patent also has a speaker center glue disclosed by 201210334019.0, which is silicone modified polyurethane. In the present invention, the material of the voice coil and the diaphragm can be selected. The main method is to connect the voice coil and the diaphragm as a whole, eliminate the gap between the voice coil and the slot, improve the rigid connection, and improve the overall movement consistency. Sex.

Beneficial effects: the voice coil of the present invention penetrates the light rigid inner layer and the light rigid interlayer of the diaphragm and then directly reaches the light rigid outer layer, so that the voice coil forms an embedded rigid connection after penetrating the diaphragm, regardless of whether the diaphragm has multiple layers or How thick it is to ensure that the voice coil and each layer of rigid body of the diaphragm form a rigid connection, so that it can move as a whole and vibrate synchronously, without buffering or inconsistent movement. It can effectively push the air during high-speed vibration, thereby The distortion is significantly reduced, and the sound quality is good.

Description of the drawings

Figure 1 is a schematic diagram of the structure of the present invention.

In the picture: 1-diaphragm, 2-voice coil, 3-lightweight rigid outer layer, 4-lightweight rigid interlayer, 5-lightweight rigid inner layer, 6-slot, 7-speaker center glue.

detailed description

In order to make the technical means, creative features, and objectives of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

Example: As shown in Figure 1, a voice coil and diaphragm assembly includes a voice coil 2 and a diaphragm 1. The diaphragm 1 consists of a lightweight rigid outer layer 3, a lightweight rigid interlayer 4 and a lightweight rigid inner layer 5. The lightweight rigid outer layer 3 is a carbon fiber outer layer, the lightweight rigid interlayer 4 is a PMI foam interlayer, and the lightweight rigid inner layer 5 is a carbon fiber inner layer. The wall thickness of the PMI foam interlayer is larger than that of the carbon fiber outer layer and carbon fiber. The inner layer, carbon fiber outer layer and carbon fiber inner layer have the same wall thickness.

The inner end surface of the diaphragm 1 is provided with a slot 6 that allows the voice coil 2 to be inserted. The slot 6 penetrates the light rigid inner layer 4 and the light rigid interlayer 5 of the diaphragm 1 to reach the light rigid outer layer 3, the voice coil 2 After being inserted into the slot 6, the light and rigid outer layer 3 of the diaphragm 1 is directly pressed.

The voice coil 2 and the diaphragm 1 are an integrated connection structure. More specifically, the parts where the voice coil 2 contacts the light rigid inner layer 5, the light rigid interlayer 4 and the light rigid outer layer 3 of the diaphragm 1 are all One-piece connection structure.

The specific performance is as follows: the slot width of the slot 6 is greater than the wall thickness of the voice coil 2, and the slot 6 is filled with speaker center glue 7, more specifically, the gap between the voice coil 2 and the slot 6 inserted in the slot 6 Filled with horn center glue 7.

Use: The voice coil of the present invention penetrates the light rigid inner layer and the light rigid interlayer of the diaphragm and then directly reaches the light rigid outer layer, so that the voice coil penetrates the diaphragm to form an embedded rigid connection, regardless of whether the diaphragm has multiple layers or more Thickness can ensure that the voice coil and each layer of rigid body of the diaphragm form a rigid connection, so that it can move as a whole and vibrate synchronously, without buffering or inconsistent movement. It can effectively push the air during high-speed vibration, which is obvious Reduce the distortion and the sound quality is good.

Claims

A voice coil and diaphragm assembly, comprising a voice coil and a diaphragm. The diaphragm is composed of a light rigid outer layer, a light rigid interlayer and a light rigid inner layer in sequence, and is characterized in that the diaphragm A slot is provided on the inner side end surface of the voice coil to allow the voice coil to be inserted. The slot penetrates the light rigid inner layer and the light rigid interlayer of the diaphragm to the light rigid outer layer, and the voice coil is inserted into the The inside of the slot is directly against the light rigid outer layer of the diaphragm.
The voice coil and diaphragm assembly of claim 1, wherein the lightweight rigid outer layer is a carbon fiber outer layer, the lightweight rigid interlayer is a PMI foam interlayer, and the lightweight rigid inner layer is a carbon fiber Inner layer.
The voice coil and diaphragm assembly of claim 2, wherein the wall thickness of the PMI foam interlayer is greater than the carbon fiber outer layer and the carbon fiber inner layer, and the carbon fiber outer layer and the carbon fiber inner layer have the same wall thickness.
The voice coil and diaphragm assembly according to claim 1 or 2 or 3, wherein the voice coil and the diaphragm are an integral connection structure, more specifically, the light and rigid inner layer of the voice coil and the diaphragm , The contact part of the lightweight rigid interlayer and the lightweight rigid outer layer is an integrated connection structure.
The voice coil and diaphragm assembly of claim 4, wherein the groove width of the slot is greater than the wall thickness of the voice coil, and the slot is filled with horn center glue, more specifically, inserted into the slot The gap between the inner voice coil and the slot is filled with speaker center glue.