CN219349489U

CN219349489U - Curved surface electronic touch structure and curved surface electronic touch product

Info

Publication number: CN219349489U
Application number: CN202222561408.9U
Authority: CN
Inventors: 雷浩; 王秋; 冯长海
Original assignee: Suzhou Huiwen Nanotechnology Co ltd
Current assignee: Suzhou Huiwen Nanotechnology Co ltd
Priority date: 2022-09-27
Filing date: 2022-09-27
Publication date: 2023-07-14
Anticipated expiration: 2032-09-27

Abstract

The utility model provides a curved surface electronic touch structure and a curved surface electronic touch product. The curved surface electronic touch structure comprises: a curved surface structure having an outer surface and an inner surface opposite the outer surface, the inner surface having an electrode material layer formed thereon; the flexible pressure sensing assembly is formed on the outer surface of the curved surface structure and comprises a flexible electrode formed on the outer surface of the curved surface structure and a flexible pressure sensitive layer formed on the flexible electrode, and the flexible electrode is electrically connected with the electrode material layer. According to the scheme, the flexible pressure sensing assembly is directly formed on the curved surface structure, so that external pressure can directly act on the flexible pressure sensing assembly of the curved surface structure, measurement errors and assembly errors caused by an intermediate transmission structure are avoided, and the assembly difficulty of products is greatly reduced.

Description

Curved surface electronic touch structure and curved surface electronic touch product

Technical Field

The utility model relates to the technical field of electronic touch, in particular to a curved surface electronic touch structure and a curved surface electronic touch product.

Background

The pressure detection has wide application prospect in the fields of industrial production, man-machine interaction, collision prevention and the like, and the realization of the pressure detection at present is mostly a MEMS pressure sensor with a silicon substrate or a ceramic substrate. The sensitive part and the packaging material of the pressure sensor are hard materials, so that the pressure sensor cannot be used in an application scene of the pressure measurement with a curved shell. Most electronic products in daily life such as Bluetooth headphones, electronic cigarettes, sweeping robots and the like, wherein the outer surfaces of the electronic products are curved surfaces, the pressure of fingers is very important sensing quantity in the process of interacting with people, and the MEMS pressure sensor cannot sense the pressing force of the fingers and cannot measure the pressing force. The film key switch or the mechanical key switch which is commonly used needs to be provided with through holes with large sensing area and the like on the shell, and needs a complex assembly structure, which is not beneficial to the waterproof and dustproof design of the product.

The flexible pressure sensor has the advantages of sensitive pressure sensing and whole flexibility, and is widely applied to the field of electronic product touch control. Flexible pressure sensors are typically manufactured by vapor deposition or printing of electrodes and pressure sensitive materials onto a flexible substrate, respectively, and then attaching the two pieces together through an encapsulation layer to provide the device with excellent flexibility.

Disclosure of Invention

The inventor of the application finds that in the prior art, a pressure sensor needs to be adhered to a curved surface structure, the pressure sensor is provided with a substrate, and then the pressure sensor is adhered to the curved surface structure, and the thickness of the curved surface structure is added, so that the thickness of the whole device is thicker, the reserved space of a product needs to be increased, and the volume of the product is increased. Secondly, the installation of the flexible pressure sensor is mostly fixed on the inner side of the shell through double-sided adhesive tape, and then the position of the pressure sensitive layer is provided with a thimble or a silica gel pad to ensure that the sensor can have good deformation after being stressed, so that a larger signal-to-noise ratio is generated, however, the installation mode has higher requirements on the distance between the sensor and the thimble and the position tolerance, and the assembly difficulty is greatly increased. In addition, the force of pressing by the human body is transmitted to the sensor through the product shell to deform the sensor, and the pressure is not in direct contact with the sensor in the process, so that the measuring error of the pressure is larger.

An object of the present utility model is to reduce the thickness of a flexible pressure sensor, avoiding measurement errors and assembly errors of the product through an intermediate transfer structure.

A further object of the present utility model is to improve product assembly efficiency.

In particular, the present utility model provides a curved electronic touch structure having a curved structure, including:

a curved surface structure having an outer surface and an inner surface opposite the outer surface, the inner surface having an electrode material layer formed thereon;

the flexible pressure sensing assembly is formed on the outer surface of the curved surface structure and comprises a flexible electrode formed on the outer surface of the curved surface structure and a flexible pressure sensitive layer formed on the flexible electrode, and the flexible electrode is electrically connected with the electrode material layer.

Optionally, the shape of the flexible electrode is a patterned electrode shape.

Alternatively, the thickness of the flexible electrode is selected to be any one value in the range of 1 μm to 25 μm.

Optionally, the flexible pressure sensitive layer is a thin film structure and has a thickness of any one of 1 μm to 50 μm.

Optionally, the curved electronic touch structure further includes:

and the circuit board is formed on the inner surface of the curved surface structure or is arranged in the curved surface structure, and the circuit board is electrically connected with the electrode material layer.

Optionally, the curved surface structure includes at least one through hole and at least one conductive layer corresponding to the at least one through hole and formed within the through hole, the conductive layer being formed to be electrically connected to both the electrode material layer and the flexible electrode.

Optionally, the flexible pressure sensing assembly further comprises a flexible protective layer formed on the flexible pressure sensitive layer.

Optionally, the flexible pressure sensing component has a thickness on the order of microns.

In particular, the utility model also provides a curved surface electronic touch product, which comprises the curved surface electronic touch structure.

Optionally, the curved surface structure is used as a housing or a part of a housing of the curved surface electronic touch structure.

According to the scheme of the utility model, the flexible pressure sensing assembly is directly formed on the curved surface structure, so that external pressure can directly act on the flexible pressure sensing assembly of the curved surface structure, measurement errors and assembly errors caused by an intermediate transmission structure are avoided, and the assembly difficulty of products is greatly reduced. In addition, the flexible pressure sensing component is directly formed on the curved surface structure, the curved surface structure can be a shell or a part of a shell of the curved surface electronic touch structure, and meanwhile, the curved surface structure can also be regarded as a substrate of the flexible pressure sensor, so that the flexible pressure sensor structure avoids the introduction of the flexible substrate and the adhesive, thereby reducing the thickness of the flexible pressure sensor and providing a larger space for the design of curved surface products.

Further, through the through hole is formed in the curved surface structure, the conducting layer is formed in the through hole, and the circuit board is electrically connected with the flexible electrode, so that complex wiring is avoided, and the assembly efficiency of products is improved.

The above, as well as additional objectives, advantages, and features of the present utility model will become apparent to those skilled in the art from the following detailed description of a specific embodiment of the present utility model when read in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the utility model will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts or portions. It will be appreciated by those skilled in the art that the drawings are not necessarily drawn to scale. In the accompanying drawings:

FIG. 1 illustrates a schematic side view of a curved electronic touch structure in accordance with one embodiment of the utility model;

FIG. 2 illustrates a schematic structural exploded view of a curved electronic touch structure in accordance with one embodiment of the present utility model;

FIG. 3 is a graph showing the resistance change of a curved electronic touch structure under different frequency pressures with the same pressing force, according to one embodiment of the utility model;

FIG. 4 illustrates an assembly diagram of a curved electronic touch structure applied to collision monitoring in accordance with one embodiment of the present utility model;

FIG. 5 illustrates an assembly diagram of a curved electronic touch structure applied to touch detection in accordance with one embodiment of the present utility model;

in the figure: 1-curved surface structure, 11-through hole, 12-conducting layer, 2-flexible electrode, 3-flexible pressure sensitive layer, 4-flexible protective layer, 5-electrode material layer.

Detailed Description

Other advantages and effects of the present application will become apparent to those skilled in the art from the present disclosure, when the following description of the embodiments is taken in conjunction with the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. The present application may be embodied or carried out in other specific embodiments, and the details of the present application may be modified or changed from various points of view and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

It should also be noted that the illustrations provided in the following embodiments merely illustrate the basic concepts of the application by way of illustration, and only the structures related to the application are shown in the drawings and are not drawn according to the number, shape and size of the structures in actual implementation, and the form, number and proportion of the structures in actual implementation may be arbitrarily changed, and the structural layout may be more complex.

In addition, in the following description, specific details are provided in order to provide a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects may be practiced without these specific details.

Fig. 1 shows a schematic side view of a curved electronic touch structure according to one embodiment of the utility model. Fig. 2 shows a schematic structural exploded view of a curved electronic touch structure according to one embodiment of the utility model. As shown in fig. 1 and 2, the curved electronic touch structure includes a curved structure 1 and a flexible pressure sensing component. The curved structure 1 has an outer surface and an inner surface opposite the outer surface, at which an electrode material layer 5 is formed. The flexible pressure sensing component is formed on the curved surface structure 1, and comprises a flexible electrode 2 formed on the curved surface structure 1 and a flexible pressure sensitive layer 3 formed on the flexible electrode 2, wherein the flexible electrode 2 is electrically connected with the electrode material layer 5.

According to the scheme of the utility model, the flexible pressure sensing component is directly formed on the curved surface structure 1, so that external pressure can directly act on the flexible pressure sensing component of the curved surface structure 1, measurement errors and assembly errors caused by an intermediate transmission structure are avoided, and the assembly difficulty of products is greatly reduced.

The flexible pressure sensing component is directly formed on the curved surface structure 1, the curved surface structure 1 can be a shell or a part of a shell of a curved surface electronic touch structure, and meanwhile, the curved surface structure 1 can also be regarded as a substrate of the flexible pressure sensor, so that the flexible pressure sensing component avoids the introduction of a flexible substrate and an adhesive, thereby reducing the thickness of the flexible pressure sensor and providing a larger space for the design of curved surface products.

The flexible electrode 2 has a patterned electrode shape, for example, an interdigital shape, and the interdigital width of the interdigital shape may be, for example, 100 μm, 200 μm, 300 μm, 400 μm or 500 μm, or any other value in the range of 100 to 500 μm, and the interdigital interval of the interdigital shape may be 50 μm, 100 μm, 200 μm, 300 μm, 400 μm or 500 μm, or any other value in the range of 50 to 500 μm. The shape of the flexible electrode 2 may be any shape that conforms to the curved surface structure 1.

The material of the flexible electrode 2 comprises one or more of conductive silver paste, conductive carbon paste, conductive polymer. The material of the flexible electrode 2 is formed into a patterned electrode shape on the outer surface of the curved surface structure 1 by one of ink-jet printing, mask spraying and laser writing. The thickness of the flexible electrode 2 is selected to be 1 μm, 5 μm, 10 μm, 15 μm, 20 μm or 25 μm, or any other value in the range of 1 μm to 25 μm.

The flexible pressure-sensitive layer 3 is a thin film structure, and its thickness may be, for example, 1 μm, 5 μm, 10 μm, 15 μm, 20 μm, 25 μm, 35 μm, 40 μm, 45 μm or 50 μm, or any other value from 1 μm to 50 μm. The material of the flexible pressure sensitive layer 3 comprises a polymer material and a conductive nanomaterial. The polymer material comprises one or more of silica gel, polyurethane and ionic gel. The conductive nanomaterial comprises one or more of carbon nanotubes, graphene, carbon particles and conductive metal powder. The flexible pressure-sensitive layer 3 is coated on the upper surface of the flexible electrode 2 by means of ink-jet printing or spraying, and is solidified into a film.

In one embodiment, the flexible pressure sensing assembly further comprises a flexible protective layer 4, the flexible protective layer 4 being formed on the flexible pressure sensitive layer 3. The flexible protective layer 4 is coated on the upper surface of the flexible pressure sensitive layer 3 in a spraying manner, so as to play a role in protection. The thickness of the flexible protective layer 4 may be, for example, 1 μm, 5 μm, 10 μm, 15 μm or 20 μm, or any other value from 1 μm to 20 μm. The material of the flexible protective layer 4 is one or more of rubber, three-proofing paint, insulating paint and teflon.

The curved surface structure 1 is made of non-conductive material, and a circuit board of the curved surface electronic touch structure is formed on the inner surface or inside the curved surface structure 1 and is electrically connected with the electrode material layer 5. In one embodiment, the curved surface structure 1 comprises at least one through hole 11 and at least one conductive layer 12 corresponding to the at least one through hole 11 and formed in the through hole 11, wherein the conductive layer 12 is formed to be electrically connected with the electrode material layer 5 and the flexible electrode 2, and in this embodiment, the electrical signal of the flexible pressure sensing component is transmitted to the circuit board through the electrode material layer 5, so as to realize collection and identification of the electrical signal.

The number of flexible pressure sensing components may be one or more. When the number of the flexible pressure sensing assemblies is plural, the plurality of flexible pressure sensing assemblies are arranged in an array to form the array type flexible pressure sensing assembly. The curved surface electronic touch structure can be regarded as an ultrathin flexible pressure sensor.

Fig. 3 shows a graph of resistance change of a curved electronic touch structure under different frequency pressures with the same pressing force, according to an embodiment of the utility model. As shown in FIG. 3, the resistance change of the sensor is 160KΩ under the pressing force of 0.5N, the resistance change is obvious, and the resistance value change is not affected by the pressing frequency, so that the high sensitivity and the rapid response speed of the sensor are embodied.

In particular, the utility model provides a touch product with a curved surface structure 1, which comprises the curved surface electronic touch structure. The curved surface structure 1 of the curved surface electronic touch structure is used as a shell or a part of a shell of a curved surface electronic touch product.

Fig. 4 illustrates an assembly diagram of a curved electronic touch structure applied to collision monitoring according to one embodiment of the utility model. As shown in fig. 4, the touch product of the curved surface structure 1 may be a housing of a circular arc-shaped sweeping robot. Fig. 5 illustrates an assembly diagram of a curved electronic touch structure applied to touch detection according to an embodiment of the present utility model. As shown in fig. 5, the touch product with the curved surface structure 1 may be a shell of a circular arc bluetooth headset. When the flexible pressure sensing component on the curved surface structure 1 is collided and extruded, a larger resistance change signal is generated, and the electric signal is collected by the circuit board, so that the collision direction and the force are identified.

When the number of the flexible pressure sensing assemblies is multiple, a larger resistance change signal is generated after any flexible pressure sensing assembly is collided and extruded, and the electric signal is collected by the circuit board.

By now it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the utility model have been shown and described in detail herein, many other variations or modifications that are consistent with the general principles of the utility model may be directly determined or derived from the disclosure of the utility model without departing from the spirit and scope of the utility model. Accordingly, the scope of the present utility model should be understood and deemed to cover all such other variations or modifications.

Claims

1. The utility model provides a curved surface electronic touch structure which characterized in that includes:

2. The curved electronic touch structure of claim 1, wherein said flexible electrode is shaped as a patterned electrode.

3. The curved surface electronic touch structure of claim 1, wherein the thickness of said flexible electrode is selected to be any value in the range of 1 μm-25 μm.

4. The curved surface electronic touch structure of claim 1, wherein said flexible pressure sensitive layer is a thin film structure and has a thickness of any one of 1 μm to 50 μm.

5. The curved electronic touch structure of claim 1, further comprising:

6. The curved surface electronic touch structure of any of claims 1-5, wherein said curved surface structure comprises at least one via and at least one conductive layer corresponding to and formed within said at least one via, said conductive layer being formed in electrical connection with both said electrode material layer and said flexible electrode.

7. The curved electronic touch structure of any of claims 1-5, wherein said flexible pressure sensing component further comprises a flexible protective layer formed on said flexible pressure sensitive layer.

8. The curved electronic touch structure of claim 7, wherein said flexible pressure sensing element has a thickness on the order of microns.

9. A curved electronic touch product comprising the curved electronic touch structure of any of claims 1-8.

10. The curved surface electronic touch product of claim 9, wherein the curved surface structure of the curved surface electronic touch structure is used as a housing or a partial structure of a housing of the curved surface electronic touch product.