CN108091417B - Flexible conductive film, sound generating device and wearable equipment - Google Patents
Flexible conductive film, sound generating device and wearable equipment Download PDFInfo
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- CN108091417B CN108091417B CN201711408627.0A CN201711408627A CN108091417B CN 108091417 B CN108091417 B CN 108091417B CN 201711408627 A CN201711408627 A CN 201711408627A CN 108091417 B CN108091417 B CN 108091417B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
- H01B5/14—Non-insulated conductors or conductive bodies characterised by their form comprising conductive layers or films on insulating-supports
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
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- Acoustics & Sound (AREA)
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Abstract
The invention discloses a flexible conductive film, a sound production device and wearable equipment. The flexible conductive film comprises a base material layer and a nanometer material conductive layer, wherein the nanometer material conductive layer is attached to the base material layer. The flexible conductive film has the characteristics of high strength, good flexibility and good conductivity.
Description
Technical Field
The invention relates to the technical field of material preparation, in particular to a flexible conductive film, a sound production device and wearable equipment.
Background
Along with the continuous development of smart homes and wearable products, the requirements of people on the softness and comfort of the wearable products are higher and higher.
The existing film material and the conductive material are difficult to simultaneously meet the requirements of wearable products on strength, flexibility and conductivity. When the electronic product is used, the conductivity of the product is reduced after the conductive material is bent, and the comfort level of the wearable product is influenced.
Disclosure of Invention
An object of the present invention is to provide a new solution for a flexible conductive film.
According to a first aspect of the present invention, a flexible conductive film is provided. The flexible conductive film comprises a base material layer and a nanometer material conductive layer, wherein the nanometer material conductive layer is attached to the base material layer.
Optionally, the nanomaterial conductive layer is prepared from a nano metal slurry.
Optionally, the nano metal paste is selected from at least one of nano silver paste, nano copper paste, nano aluminum paste, nano gold paste and nano zinc paste.
Optionally, the substrate layer comprises at least one of a composite layer of elastomer and fibrous material, an elastomer layer, a fibrous material layer, and an engineering plastic layer.
Optionally, the elastomer for making the substrate layer comprises a polyurethane material or a silicone rubber.
Optionally, the substrate layer comprises at least two of a composite layer of elastomer and fiber material, an elastomer layer, a fiber material layer and an engineering plastic layer, and the nanomaterial conductive layer is located between the at least two substrate layers.
Optionally, the substrate layer comprises two outer layers and an inner layer located between the two outer layers, and the outer layer is at least one of an elastomer layer and an engineering plastic layer; the inner layer is at least one of a composite layer of an elastomer and a fiber material, an elastomer layer and a fiber material layer;
and the nano material conducting layers are respectively attached between the two surfaces of the inner layer and the two corresponding outer layers.
Optionally, the fibrous material used to prepare the substrate layer comprises at least one of carbon fibers, aramid fibers, and glass fibers.
Optionally, the fibrous material used to prepare the substrate layer comprises at least one of chopped strand mat and continuous fiber cloth.
Optionally, the thickness of the nanomaterial conductive layer is 2-25 μm.
According to a second aspect of the present invention, a sound generating device is provided. The device comprises a vibration assembly and a magnetic circuit assembly, wherein the vibration assembly comprises a voice coil and the flexible conductive film provided by the invention, and the flexible conductive film is used as a vibrating diaphragm; one end of the voice coil is connected with the flexible conductive film, an end line of the voice coil is electrically connected with the nano material conductive layer of the flexible conductive film, and the nano material conductive layer is conducted with an external circuit; the other end of the voice coil is inserted into the magnetic gap of the magnetic circuit assembly.
According to a third aspect of the invention, a wearable device is provided. The device comprises a sensor for sensing the motion and/or physiological parameters of a human body and the flexible conducting film, wherein the sensor is electrically connected with the nano material conducting layer of the flexible conducting film, and the nano material conducting layer is conducted with an external circuit.
According to one embodiment of the present disclosure, in the embodiment of the present invention, a nanomaterial conductive layer is attached to a surface of the substrate layer. The nano material conducting layer has a good conducting effect. The electronic device can be conducted with an external circuit through the nanomaterial conductive layer. The substrate layer may provide a matrix and/or backbone for the flexible conductive film. This makes the flexible conducting film can regard as the vibrating diaphragm that is used for the sound production, can regard as the rete with human laminating again.
The user can divide the nano-material conductive layer of the same layer into a plurality of areas to be used as conductors of different electronic devices or as a positive electrode conductor and a negative electrode conductor respectively. The plurality of nanomaterial conductive layers may be provided to serve as conductors of different electronic devices, or to serve as a positive electrode conductor and a negative electrode conductor.
By the mode, the flexible conductive film has enough strength and flexibility and good conductive performance. The electronic equipment is not additionally provided with a lead to be electrically connected with an external circuit. Thus, the wiring of the lead wire is not taken into consideration at the time of assembly, and the interference of the lead wire with other components is reduced.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic structural diagram of a flexible conductive film according to an embodiment of the present invention.
Fig. 2 is a partially enlarged view of a portion a in fig. 1.
Fig. 3 is a partial enlarged view of a flexible conductive film according to another embodiment of the invention.
FIG. 4 is a schematic illustration of a chopped strand mat according to one embodiment of the present invention.
Fig. 5 is a schematic view of a continuous fiber cloth according to an embodiment of the present invention.
Description of reference numerals:
11: an elastomeric layer; 12: a nano silver layer; 13: and (3) compounding the elastomer and the fiber material.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 1 is a schematic structural diagram of a flexible conductive film according to an embodiment of the present invention. Fig. 2 is a partially enlarged view of a portion a in fig. 1.
As shown in fig. 1-2, the flexible conductive film includes a substrate layer and a nanomaterial conductive layer. The nanomaterial conductive layer is attached to the substrate layer. The substrate layer provides a base and/or backbone for the flexible conductive film.
Optionally, the substrate layer comprises at least one of a composite layer 13 of elastomer and fiber material, an elastomer layer 11, a fiber material layer, and an engineering plastic layer. The material has high structural strength. The composite layer 13 of elastomer and fiber material may be formed by bonding an elastomer layer and a fiber material layer together, or by impregnating a fiber material layer in an elastomer layer.
The fibrous material layer is prepared from fibrous materials. The fiber material layer has high strength and high toughness. The fiber material layer is used as a framework of the flexible conductive film and plays a supporting role.
In one example, the material of the fiber used to prepare the substrate layer includes at least one of carbon fiber, aramid fiber, and glass fiber. The material has high structural strength and good flexibility, and can improve the strength and the deformability of the flexible conductive film.
In one example, the fibrous material used to prepare the substrate layer includes chopped strand mat or continuous fiber cloth. As shown in fig. 4, the chopped strand mat is obtained by wet-in-line chopping of strands drawn from a sizing agent. As shown in fig. 5, the continuous fiber cloth is produced from raw fibers through processes such as winding and weaving. The two fiber material layers have good flatness, strength and flexibility, and the bonding strength with the nanometer material conducting layer is high.
Optionally, the filaments comprise at least one of carbon fiber filaments, aramid fiber filaments, and glass fiber filaments. The skilled person can select the desired one according to the actual need.
The elastomer layer 11 is flexible, which ensures that the flexible conductive film has sufficient ductility.
Optionally, the elastomer for making the substrate layer comprises a polyurethane material or a silicone rubber. These materials are characterized by high strength and good ductility. This makes the flexible conductive film good in flexibility and elasticity. In some examples, the elastomeric layer 11 itself is tacky, such as a polyurethane material. Such a material may be directly attached to the layer of fibrous material.
Preferably, the layer of fibrous material and the layer of elastomer 11 are compounded together, which gives the flexible conductive film sufficient strength as well as flexibility. The nano material conducting layer is prepared from a conductive nano material. The nano material can be a nano metal material or a nano nonmetal material.
In the embodiment of the invention, the nanomaterial conductive layer is attached to the surface of the base material layer. The nano material conducting layer has a good conducting effect. The electronic device can be conducted with an external circuit through the nanomaterial conductive layer. The substrate layer may provide a matrix and/or backbone for the flexible conductive film. This makes the flexible conducting film can regard as the vibrating diaphragm that is used for the sound production, can regard as the rete with human laminating again.
The user can divide the nano-material conductive layer of the same layer into a plurality of areas to be used as conductors of different electronic devices or as a positive electrode conductor and a negative electrode conductor respectively. The plurality of nanomaterial conductive layers may be provided to serve as conductors of different electronic devices, or to serve as a positive electrode conductor and a negative electrode conductor.
By the mode, the flexible conductive film has enough strength and flexibility and good conductive performance. The electronic equipment is not additionally provided with a lead to be electrically connected with an external circuit. Thus, the wiring of the lead wire is not taken into consideration at the time of assembly, and the interference of the lead wire with other components is reduced.
In one example, the nanomaterial conductive layer is prepared from a nanometal paste. The nano-metal paste includes nano-metal particles and a binder. The nano-metal particles are dispersed in a binder to form a slurry. And volatilizing the solvent of the binder by drying the nano metal slurry to form the film layer. The binder can be selected by those skilled in the art according to the actual circumstances.
The nano-material conducting layer prepared from the nano-metal slurry has the characteristics of good electrical conductivity and strong adhesive force. The skilled person can apply the nano-metal slurry to the surface of the substrate layer by dipping, coating or printing. The nano metal slurry can be coated on one surface of the substrate layer, and can also be coated on two opposite surfaces. And then, drying the slurry to form the nano-material conductive layer.
Optionally, the nano metal paste is selected from at least one of nano silver paste, nano copper paste, nano aluminum paste, nano gold paste and nano zinc paste. The nano metal slurry has high stability and good conductive effect, and the prepared nano material conductive layer is firmly combined with the base material layer.
The person skilled in the art can control the resistance of the nanomaterial conductive layer by selecting the type of nanomaterial slurry and setting the thickness of the nanomaterial conductive layer.
The larger the thickness of the nanomaterial conductive layer is, the lower the resistance of the flexible conductive film is, but the structural strength of the flexible conductive film is adversely affected. The smaller the thickness of the nanomaterial conductive layer, the greater the resistance of the flexible conductive film.
Preferably, the nanomaterial conductive layer has a thickness of 2-25 μm. The thickness ensures that the conductive performance of the flexible conductive film is good and the structural strength is high.
In one example, the substrate layer comprises at least two of a composite layer of elastomer and fiber material, an elastomer layer, a fiber material layer, and an engineering plastic layer, and the nanomaterial conductive layer is located between the at least two substrate layers. For example, as shown in fig. 2, the base material layer includes an elastomer layer 11 and a composite layer 13 of an elastomer and a fiber material. The nanomaterial conductive layer is located between the elastomer layer 11 and the composite layer 13. Specifically, the elastomer layer 11 is a polyurethane layer or a silicone rubber layer. The nanofiber conductive layer is a nano silver layer 12. The nano silver layer 12 is prepared from nano silver paste. In use, the elastomer layer 11 and the composite layer 13 are connected to an electronic device or are in contact with a human body. The two layers serve as isolation to prevent the nanomaterial conductive layer from being damaged or short-circuited. The material has the characteristics of good flexibility and high strength.
Alternatively, the substrate layer includes an engineering plastic layer and a composite layer 13 of an elastomer and a fiber material. The nanomaterial conductive layer is located between the engineering plastic layer and the composite layer 13. Specifically, the engineering plastic layer is made of engineering plastics, and comprises PEEK (polyether ether ketone), PAR (polyaryl ester) and the like. In use, the engineering plastic layer and the composite layer 13 are connected to an electronic device or are in contact with a human body. The two layers serve as isolation to prevent the nanomaterial conductive layer from being damaged or short-circuited. The material has the characteristics of good flexibility and high strength.
Alternatively, the base material layer includes a fiber material layer and a composite layer 13 of an elastomer and a fiber material. At this time, the nanomaterial conductive layer is located between the fiber material layer and the composite layer 13.
Alternatively, the substrate layer comprises the elastomer layer 11 and the engineering plastic layer, and the nanomaterial conductive layer is located between the elastomer layer 11 and the engineering plastic layer.
Alternatively, the substrate layer comprises an elastomer layer 11 and a fibrous material layer, in which case the nanomaterial conductive layer is located between the elastomer layer 11 and the fibrous material layer.
Or the base material layer comprises an engineering plastic layer and a fiber material layer, and the nano material conducting layer is positioned between the engineering plastic layer and the fiber material layer.
Fig. 3 is a partial enlarged view of a flexible conductive film according to another embodiment of the invention.
In this example, the substrate layer includes two outer layers, and an inner layer positioned between the two outer layers, the outer layers being at least one of an elastomeric layer and an engineering plastic layer. The inner layer is at least one of a composite layer of elastomer and fiber material, an elastomer layer and a fiber material layer. And nano material conductive layers are respectively attached between the two surfaces of the inner layer and the two corresponding outer layers.
For example, the outer layer is an elastomer layer 11, and the inner layer is a composite layer 13 of elastomer and fiber material, in which case the flexible conductive film includes two elastomer layers 11 and a composite layer 13 of elastomer and fiber material between the two elastomer layers 11. Between the two surfaces of the composite layer 13 and the corresponding two elastomer layers 11, a nanomaterial conductive layer is attached, respectively. Specifically, the elastomer layer 11 is a silicone rubber layer or a polyurethane layer. The nanofiber conductive layer is a nano silver layer 12. The positive electrode and the negative electrode of the electronic device can be conducted with an external circuit through the two nanometer material conducting layers.
Or, the outer layer is an engineering plastic layer, the inner layer is a composite layer 13 of an elastomer and a fiber material, and the flexible conductive film comprises two engineering plastic layers and the composite layer 13 of the elastomer and the fiber material between the two engineering plastic layers. And nano-material conductive layers are respectively attached between the two surfaces of the composite layer 13 and the two corresponding engineering plastic layers.
Or the outer layer is at least one of an elastomer layer and an engineering plastic layer, and the inner layer is at least one of a composite layer of an elastomer and a fiber material, an elastomer layer and a fiber material layer, which are not described in detail herein.
In addition, the flexible conductive film has the characteristics of high structural strength and good flexibility.
According to another embodiment of the present invention, a sound generating apparatus is provided. The sound generating device may be a micro-speaker or a horn device. The sound generating device comprises a vibration component and a magnetic circuit component. The vibration component is used for vibrating and sounding. The magnetic circuit assembly provides a magnetic field for vibration of the vibration assembly.
In this example, the vibration assembly includes a voice coil and a flexible conductive film provided by the present invention. The flexible conductive film is used as a diaphragm.
One end of the voice coil is connected with the flexible conductive film. And the end wire of the voice coil is electrically connected with the nano material conducting layer of the flexible conducting film. The terminal wires include a positive terminal wire and a negative terminal wire. The positive and negative terminal wires are respectively electrically connected with the two nano material conducting layers; or the positive and negative terminal wires are respectively and electrically connected with the positive conductor and the negative conductor of the same nano material conducting layer. The nanomaterial conductive layer is electrically connected with an external circuit. The other end of the voice coil is inserted into the magnetic gap of the magnetic circuit assembly. A magnetic field is formed in the magnetic gap. When the voice coil is energized, the voice coil vibrates under the action of the ampere force of the magnetic field. The voice coil drives the diaphragm to vibrate to make sound.
In the sound generating device, the voice coil is conducted with the outside through the nano-material conductive layer in the diaphragm without additionally providing a lead wire. Therefore, the interference of the lead wire with other parts and the sound production and wire breakage of the lead wire during high-power use are avoided.
According to yet another embodiment of the present invention, a wearable device is provided. The wearable device may be, but is not limited to, a VR device, smart glasses, smart watches, and the like. The device comprises a sensor for sensing a motion and/or physiological parameter of a human body and the flexible conductive film provided by the invention. The sensor is electrically connected with the nano-material conductive layer of the flexible conductive film. The nanomaterial conductive layer is electrically connected with an external circuit.
The flexible conductive film is used for contacting with a human body, can deform according to the movement of the human body, and can restore the deformation. The comfort level of the flexible conductive film attached to the human body is good.
In this example, the data sensed by the sensor is conducted to an external circuit through the nanomaterial conductive layer in the flexible conductive film without providing a wire additionally. In this way, the design of the wire routing is omitted and the weight of the wearable device is reduced.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (6)
1. The flexible conductive film is characterized by comprising a substrate layer and a nano material conductive layer, wherein the nano material conductive layer is attached to the substrate layer;
the substrate layer comprises two outer layers and an inner layer positioned between the two outer layers, and the outer layer is at least one of an elastomer layer and an engineering plastic layer; the inner layer is at least one of a composite layer of an elastomer and a fiber material and an elastomer layer;
the composite layer of the elastomer and the fiber material is formed by attaching an elastomer layer and the fiber material together or by impregnating a fiber material layer in the elastomer layer; the fiber material for preparing the substrate layer comprises at least one of carbon fiber, aramid fiber and glass fiber, or the fiber material for preparing the substrate layer comprises at least one of chopped strand mat and continuous fiber cloth; the chopped strand mat is prepared by drawing a sizing agent to obtain precursor fibers and chopping the precursor fibers on line by a wet method, and the continuous fiber cloth is prepared by winding and weaving the precursor fibers;
the nanometer material conducting layers are respectively attached between the two surfaces of the inner layer and the two corresponding outer layers, and the thickness of each nanometer material conducting layer is 2-25 micrometers.
2. The flexible conductive film of claim 1, wherein the nanomaterial conductive layer is prepared from a nanometal paste.
3. The flexible conductive film of claim 2, wherein the nano-metal paste is selected from at least one of nano-silver paste, nano-copper paste, nano-aluminum paste, nano-gold paste, and nano-zinc paste.
4. The flexible conductive film of claim 1, wherein the elastomer used to make the substrate layer comprises a polyurethane material or a silicone rubber.
5. A sound generating device comprising a vibration unit and a magnetic circuit unit, wherein the vibration unit comprises a voice coil and the flexible conductive film according to any one of claims 1 to 4, and the flexible conductive film serves as a diaphragm;
one end of the voice coil is connected with the flexible conductive film, an end line of the voice coil is electrically connected with the nano material conductive layer of the flexible conductive film, and the nano material conductive layer is conducted with an external circuit; the other end of the voice coil is inserted into the magnetic gap of the magnetic circuit assembly.
6. Wearable device, characterized in that it comprises a sensor for sensing a motion and/or physiological parameter of a human body and a flexible conductive film according to any one of claims 1-4, said sensor being electrically connected to a nanomaterial conductive layer of said flexible conductive film, said nanomaterial conductive layer being in conduction with an external circuit.
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| CN201711408627.0A CN108091417B (en) | 2017-12-22 | 2017-12-22 | Flexible conductive film, sound generating device and wearable equipment |
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| CN108091417B true CN108091417B (en) | 2020-02-21 |
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| CN111916249B (en) * | 2020-06-30 | 2022-05-20 | 嘉兴中科枫林生物技术有限公司 | High-performance flexible electronic functional base material |
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