CN217739889U - Touch electrode and touch screen - Google Patents
Touch electrode and touch screen Download PDFInfo
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- CN217739889U CN217739889U CN202222002954.9U CN202222002954U CN217739889U CN 217739889 U CN217739889 U CN 217739889U CN 202222002954 U CN202222002954 U CN 202222002954U CN 217739889 U CN217739889 U CN 217739889U
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Abstract
The embodiment of the application discloses a touch electrode and a touch screen, and belongs to the technical field of terminals. The umbrella face part is the spring structure in the touch electrode that this application embodiment provided, and this spring structure can change at user's touch action electric capacity to realize touch electrode's function. The umbrella handle part in the touch electrode is of a linear structure, so that the whole touch electrode does not need to be designed into a spring type structure. On one hand, large stray capacitance caused by excessive spring type structures can be reduced, the anti-interference capacity of the touch electrode is further improved, and the sensitivity of the touch electrode is correspondingly improved. On the other hand, the material required for manufacturing the touch electrode can be reduced, and the cost for manufacturing the touch electrode is further saved.
Description
Technical Field
The embodiment of the application relates to the technical field of terminals, in particular to a touch electrode and a touch screen.
Background
With the development of terminal technology, more and more terminal devices are provided with touch screens operable by users. The touch screen is provided with touch electrodes, and the capacitance of each touch electrode changes in response to the touch action of the user, so that the terminal device can determine whether the touch action of the user is detected according to the change of the capacitance of the touch electrode, and further execute an instruction related to the touch action of the user. The structure of the touch electrode may affect the sensitivity of the terminal device for detecting the capacitance to some extent, that is, the sensitivity of the touch electrode may be affected. Therefore, how to design the structure of the touch electrode is a hot spot of current research.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a touch electrode and terminal equipment, which can improve the sensitivity of the touch electrode, and further improve the response sensitivity of the terminal equipment to a touch action of a user. The technical scheme is as follows:
in one aspect, a touch electrode is provided, the touch electrode includes an umbrella surface portion and an umbrella handle portion, the umbrella surface portion is a spring structure, the umbrella handle portion is a linear structure:
the umbrella top of the umbrella cover part is connected with the first end of the umbrella handle part;
the opening of the umbrella surface part is used for sensing touch action, and the second end of the umbrella handle part is used for being connected with a Printed Circuit Board (PCB) so that the PCB can detect capacitance change of the touch electrode.
Optionally, the umbrella cover part and the umbrella handle part are formed by bending the same wire.
Optionally, the ratio between the height of said canopy portion and the height of said shaft portion is 1;
the height of the canopy portion is the distance from the top of the canopy portion to the interface corresponding to the opening of the canopy portion, and the height of the stem portion is the distance between the first end and the second end of the stem portion.
Optionally, the touch electrode further comprises a rib portion;
the umbrella root part is connected with the second end of the umbrella handle part, and the umbrella root part is also used for being connected with the PCB.
Optionally, the umbrella root part is a welding fixing foot formed by bending a wire.
Optionally, the umbrella root portion and the umbrella stem portion are formed by bending the same wire.
Optionally, the umbrella cover portion, the umbrella handle portion and the umbrella root portion are formed by bending the same conducting wire.
In another aspect, a touch screen is provided, which includes a panel, a printed circuit board PCB, and at least one touch electrode provided in the above aspect;
the first surface of the panel and the first surface of the PCB are arranged oppositely;
the opening of the umbrella cover part of each touch electrode in the at least one touch electrode is connected with the first surface of the panel, and the second end of the umbrella handle part of each touch electrode is connected with the PCB;
optionally, the first face of the panel is provided with at least one convex surface;
the at least one convex surface and the at least one touch electrode are in one-to-one correspondence;
after the opening of the canopy portion of each touch electrode is connected to the first face of the panel, the corresponding convex surface on the first face of the panel falls into the canopy portion of each touch electrode.
Optionally, the second face of the panel comprises at least one groove;
the at least one groove corresponds to the at least one touch electrode one to one;
after the opening of the umbrella cover part of each touch electrode is connected with the first surface of the panel, the opening of the umbrella cover part of each touch electrode is positioned on the first surface and at a position opposite to the corresponding groove.
The beneficial effects brought by the technical scheme provided by the embodiment of the application at least comprise:
the umbrella face part is the spring structure in the touch electrode that this application embodiment provided, and this spring structure can change at user's touch action electric capacity to realize touch electrode's function. The umbrella handle part in the touch electrode is of a linear structure, so that the whole touch electrode does not need to be designed into a spring type structure. On one hand, the large stray capacitance caused by excessive spring type structures can be reduced, the anti-interference capability of the touch electrode is further improved, and the sensitivity of the touch electrode is correspondingly improved. On the other hand, the material required for manufacturing the touch electrode can be reduced, and the cost for manufacturing the touch electrode is further saved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a touch electrode provided in an embodiment of the present application;
FIG. 2 is a schematic structural diagram of another touch electrode provided in an embodiment of the present application;
fig. 3 is a schematic structural diagram of a touch screen provided in an embodiment of the present application;
FIG. 4 is a schematic structural diagram of another touch screen provided in the embodiments of the present application;
FIG. 5 is a schematic structural diagram of another touch screen provided in an embodiment of the present application;
fig. 6 is a schematic structural diagram of another touch screen provided in an embodiment of the present application.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present application more clear, the embodiments of the present application will be further described in detail with reference to the accompanying drawings.
Before explaining the embodiments of the present application in detail, an application scenario of the embodiments of the present application is explained first.
At present, more and more terminal devices use a touch key function. For example, many household appliances are equipped with a touch screen, and the touch screen is provided with a touch key function. According to the working principle of the touch key, capacitance is required to be formed between the touch electrode under the touch key and a human body, and when the change of the capacitance of the touch electrode is detected, the touch action of the touch key is identified.
The touch electrode generally includes two types, one type is a Printed Circuit Board (PCB) type touch electrode, and the other type is a spring type touch electrode. The spring type touch electrode is used in more and more scenes due to the advantages of simple process, easiness in implementation and the like.
The existing spring type touch electrode is generally composed of a section of conductive spring, one end of the spring is propped against a panel of the touch screen, and the other end of the spring is fixed on a PCB of the touch screen. Due to the existence of the spring, a natural antenna for transmitting and receiving electromagnetic waves is formed, and the anti-interference performance of the antenna is deteriorated. Therefore, the existing touch screen based on the spring type touch electrode is more susceptible to space electromagnetic wave interference, and the problem of erroneous recognition action is easily caused, so that the sensitivity of the touch screen is low. Meanwhile, the spring type touch electrode is more in production material consumption, and is not beneficial to reducing batch cost.
Based on this, the embodiment of the application provides a touch electrode and a touch screen, on one hand, the anti-interference capability of the touch electrode can be improved, and then the sensitivity of the touch screen is improved. On the other hand, the manufacturing cost of the touch electrode can be reduced.
The touch electrode and the touch screen provided in the embodiments of the present application are explained in detail below.
Fig. 1 is a schematic structural diagram of a touch electrode according to an embodiment of the present application. As shown in fig. 1, the touch electrode 00 includes a canopy portion 10 and a shaft portion 20, the canopy portion 10 is of a spring type structure, and the shaft portion 20 is of a linear type structure.
As shown in FIG. 1, canopy portion 10 includes a crown and an opening, and shaft portion 20 includes a first end and a second end. Wherein, the top of the umbrella surface part 10 is connected with the first end of the umbrella handle part 20; the opening of the canopy portion 10 is used for sensing a touch action, and the second end of the shaft portion 20 is used for connecting with a PCB to detect a capacitance change of the touch electrode by the PCB.
The opening of canopy portion 10 for sensing a touch action can be understood as follows: the opening of canopy portion 10 is provided on the panel of the touch screen so that the user's touch action can be applied to the opening of canopy portion 10.
The umbrella face part is the spring structure in the touch electrode that this application embodiment provided, and this spring structure can change at user's touch action electric capacity to realize touch electrode's function. The umbrella handle part in the touch electrode is of a linear structure, so that the whole touch electrode does not need to be designed into a spring type structure. On one hand, large stray capacitance caused by excessive spring type structures can be reduced, the anti-interference capacity of the touch electrode is further improved, and the sensitivity of the touch electrode is correspondingly improved. On the other hand, the material required for manufacturing the touch electrode can be reduced, and the cost for manufacturing the touch electrode is further saved.
In some embodiments, canopy portion 10 and shaft portion 20 are formed by bending the same wire. For example, the shaft portion 20 can be obtained by bending the same wire out of the canopy portion 19 and then stretching and extending the wire left at the top of the canopy portion 10.
That is, the canopy portion 10 and the top portion 20 are integrally formed of one conductive wire. The cost of fabricating the touch electrode is further reduced.
Alternatively, canopy portion 10 and crown portion 20 may be formed separately from two wires and then joined together.
In addition, to further reduce costs, canopy portion 10 can be lower in height than shaft portion 20. The height of the umbrella cover part is the distance from the umbrella top of the umbrella cover part to the interface corresponding to the opening of the umbrella cover part, and the height of the umbrella handle part is the distance between the first end and the second end of the umbrella handle part.
Illustratively, the ratio between the height of the canopy portion and the height of the shaft portion is 1. In this scenario, compared with the case that the whole touch electrode is made of springs, the material used for the touch electrode provided by the embodiment of the present application can be saved by about 50%.
Alternatively, the ratio between the height of the canopy portion and the height of the shaft portion may be other ratios, such as 1. When the touch electrode provided by the embodiment of the application is applied, the ratio between the height of the umbrella surface part and the height of the umbrella handle part can be set based on a specific scene.
In addition, to facilitate connection of the touch electrode to the PCB, in some embodiments, touch electrode 00 further includes a crown portion 30, as shown in fig. 2. Wherein the base portion 30 is connected to the second end of the shaft portion 20 and the base portion 30 is also adapted to be connected to a PCB.
Thus, when the touch electrode 00 needs to be arranged on the PCB, the umbrella root part 30 of the touch electrode 00 can be directly arranged in the fixing hole on the PCB, and the convenience in use of the touch electrode 00 is improved.
Illustratively, the umbrella root part is a welding fixing foot formed by bending a lead. In this way, the umbrella root portion 30 of the touch electrode 00 is directly soldered to the fixing hole of the PCB, thereby further improving the convenience of the touch electrode 00.
Further, in the present embodiment, the umbrella root portion 30 and the umbrella stem portion 20 may be bent from the same wire. To further reduce the cost of touch electrode 00.
For example, the former section of a wire is used as the umbrella handle part, and the latter section is bent to form the umbrella root part.
Further, the canopy portion 10, shaft portion 20, and shaft portion 30 can be formed by bending the same wire. To further reduce the cost of touch electrode 00.
For example, the front section of a conducting wire is bent to form an umbrella cover part, the middle section is directly used as an umbrella handle part, and the rear section is bent to form an umbrella root part. In this scenario, the entire touch electrode is integrally formed by one conductive wire.
Illustratively, the touch electrode 00 shown in fig. 2 is made of one complete conductive metal conductor, and is divided into three parts, i.e., a canopy part, a shaft part, and a base part in shape. As shown in fig. 2, 10 is a umbrella cover part, which is in an inverted shape with an opening upward and a top downward, and the middle of the umbrella cover part is a concentric spring; 20 is an umbrella handle part which is made by straightening and extending a spring of the umbrella cover and is vertical to the umbrella cover; 30 is the umbrella root part, and is the welding fixed foot that the wire buckled formed.
The touch electrode 00 shown in fig. 2 provides positioning and contact elasticity through the inverted umbrella surface at 10 positions, and the inverted umbrella surface has more contact surface area, enlarges the induction surface, and is easier to identify the touch capacitance variation quantity, through the umbrella handle at 22 positions for supporting the conductive wire, the problems of large stray capacitance, more material usage and the like of similar designs are solved, because the straight wire obviously reduces the stray capacitance among a shell, a panel, the ground and the like compared with a spiral spring, the touch electrode has stronger anti-interference performance and adaptability to different whole machine environments, and because the material usage is less, the cost is lower.
Based on the touch electrodes shown in fig. 1 and fig. 2, the embodiment of the present application further provides a touch screen, which is explained below.
Fig. 3 is a schematic structural diagram of a touch screen according to an embodiment of the present application. As shown in fig. 3, the touch screen 1 includes a panel 01, at least one touch electrode 00, and a PCB 02.
Wherein, the first surface of the panel 01 and the first surface of the PCB 02 are oppositely arranged. The second side of the panel 01 is a plane touched by a user. The opening of the canopy portion 10 of each touch electrode 00 of the at least one touch electrode 00 is connected to the first surface of the panel 01, and the second end of the stem portion of each touch electrode 00 is connected to the PCB 02.
Illustratively, for the touch electrode 00 shown in fig. 1, the second end of the umbrella portion 20 of the touch electrode 00 is directly soldered on the PCB 02.
Further illustratively, with the touch electrode 00 shown in fig. 2, the second end of the stem portion 20 of the touch electrode 00 is connected to the stem portion 30, and the stem portion 30 is directly soldered to the PCB 02.
Because the touch electrode provided by the embodiment of the application can reduce stray capacitance, the sensitivity of the touch screen shown in fig. 3 is higher.
In addition, in the embodiment of the present application, in order to facilitate rapid soldering of the at least one touch electrode 00 on the panel 01, an anchor point may be further provided on the panel 01.
Based on this, in some embodiments, as shown in fig. 4, the first face of the panel 01 is configured with at least one convex surface. Wherein, at least one convex surface corresponds to at least one touch electrode one to one. In this scenario, after the opening of the canopy portion of each touch electrode is connected to the first side of the panel, the corresponding convex surface on the first side of the panel falls into the canopy portion of each touch electrode.
That is, the position of the at least one touch electrode 00 on the panel 01 is positioned by the at least one convex surface.
In the present embodiment, the shape of the convex surface is not limited, and fig. 4 illustrates an arc-shaped convex surface as an example. The size of the convex surface needs to be smaller than the opening of canopy portion 10 of touch electrode 00 in order to cover the opening of canopy portion 10 on the convex surface of panel 01.
Alternatively, if no anchor point is configured on the panel 10, the welding position of the touch electrode may be selected based on the application scenario. And will not be described in detail herein.
In addition, in the embodiment of the application, the touch screen is accurately operated by a user, so that the sensitivity of the touch screen is improved. Positioning points can also be set for the user on the touch screen.
Based on this, in some embodiments, as shown in fig. 5, the second face of the panel includes at least one groove. The at least one groove and the at least one touch electrode are in one-to-one correspondence. In this scenario, after the opening of the canopy portion of each touch electrode is connected to the first surface of the panel, the opening of the canopy portion of each touch electrode is located on the first surface at a position opposite to the corresponding groove.
That is, the at least one groove helps the user to accurately locate the position of the touch electrode 00.
In the embodiment of the present application, the shape of the groove is not limited, and the circular arc groove is illustrated as an example in fig. 5. The size of the groove is also not limited
Alternatively, the panel 10 may not be provided with such positioning points as grooves. In this scenario, the user may touch the touch screen based on experience, which is not described in detail herein.
Optionally, in the embodiment of the present application, the positioning points may be provided on the first face and the second face of the panel at the same time. As shown in fig. 6, at least one convex surface is disposed on the first surface of the panel 01. Wherein, at least one convex surface corresponds to at least one touch electrode 00 one-to-one, after the opening of the umbrella surface part 10 of each touch electrode 00 is connected with the first surface of the panel 01, the corresponding convex surface on the first surface of the panel 01 falls into the umbrella surface part 10 of each touch electrode 00. And, the second face of the panel 01 includes at least one groove. At least one groove corresponds to at least one touch electrode 00 one-to-one, and after the opening of umbrella cover portion 10 of each touch electrode 00 is connected to the first surface of panel 01, the opening of umbrella cover portion 10 of each touch electrode 00 is located at a position on the first surface opposite to the corresponding groove.
The touch screen shown in fig. 6 can sense a touch action of a human body. The touch electrodes on the touch screen can be integrally manufactured and formed by a single metal elastic lead. The inverted umbrella surface part provides contact elasticity for the panel, and meanwhile, the convex-concave positioning of the panel is matched with the inverted umbrella surface shape, so that the touch induction contact surface is enlarged, and the key action identification is facilitated. The conductive umbrella handle of the touch electrode adopts a straight wire, so that the touch electrode has minimum space stray distribution capacitance, is favorable for improving EMC (electromagnetic compatibility) performance, and has lower material cost.
In fig. 4 and 6, for convenience of explaining the positional relationship between the convex surface and the umbrella surface portion of the touch electrode, the umbrella surface portion in fig. 4 and 6 is described by taking as an example that it is not welded to the panel 01.
To sum up, the embodiment of the present application provides an inverted umbrella type touch electrode that increases the contact surface, increases the interference immunity, and reduces the material cost. By adopting the inverted umbrella type design, the contact induction surface is improved, stray capacitance is reduced, the anti-interference capability is provided, and the material cost is reduced. The design is simpler, and the touch electrode has stronger capability of adapting to the environment of the whole machine.
All the above optional technical solutions can be combined arbitrarily to form an optional embodiment of the present application, and the present application embodiment is not described in detail again.
The above description is only for the purpose of illustrating the preferred embodiments of the present application and is not intended to limit the present application, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the embodiments of the present application should be included in the scope of the embodiments of the present application.
Claims (10)
1. The utility model provides a touch electrode, its characterized in that, touch electrode includes umbrella face part and umbrella stick part, umbrella face part is the spring structure, umbrella stick part is the rectilinear structure:
the umbrella top of the umbrella cover part is connected with the first end of the umbrella handle part;
the opening of the umbrella surface part is used for sensing touch action, and the second end of the umbrella handle part is used for being connected with a Printed Circuit Board (PCB) so that the PCB can detect capacitance change of the touch electrode.
2. The touch electrode of claim 1, wherein the canopy portion and the shaft portion are formed by bending the same wire.
3. The touch electrode of claim 1, wherein the ratio between the height of the canopy portion and the height of the shaft portion is 1;
the height of the umbrella cover part is the distance from the umbrella top of the umbrella cover part to the interface corresponding to the opening of the umbrella cover part, and the height of the umbrella handle part is the distance between the first end and the second end of the umbrella handle part.
4. The touch electrode of any of claims 1-3, wherein the touch electrode further comprises a umbrella root portion;
the umbrella root part is connected with the second end of the umbrella handle part, and the umbrella root part is also used for being connected with the PCB.
5. The touch electrode of claim 4, wherein the root portion of the umbrella is a solder fixing leg formed by bending a wire.
6. The touch electrode of claim 4, wherein the umbrella root portion and the umbrella stem portion are bent from the same wire.
7. The touch electrode of claim 6, wherein the canopy portion, the shaft portion, and the heel portion are formed by bending a single wire.
8. A touch screen, characterized in that the touch screen comprises a panel, a printed circuit board, PCB, and at least one touch electrode according to any one of claims 1-7;
the first surface of the panel and the first surface of the PCB are oppositely arranged;
the opening of the umbrella cover part of each touch electrode in the at least one touch electrode is connected with the first surface of the panel, and the second end of the umbrella handle part of each touch electrode is connected with the PCB.
9. The touch screen of claim 8, wherein the first side of the panel is configured with at least one convex surface;
the at least one convex surface and the at least one touch electrode are in one-to-one correspondence;
after the opening of the umbrella cover part of each touch electrode is connected with the first surface of the panel, the corresponding convex surface on the first surface of the panel falls into the umbrella cover part of each touch electrode.
10. The touch screen of claim 8 or 9, wherein the second side of the panel comprises at least one groove;
the at least one groove corresponds to the at least one touch electrode one to one;
after the opening of the umbrella cover part of each touch electrode is connected with the first surface of the panel, the opening of the umbrella cover part of each touch electrode is positioned on the first surface and opposite to the corresponding groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222002954.9U CN217739889U (en) | 2022-07-29 | 2022-07-29 | Touch electrode and touch screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222002954.9U CN217739889U (en) | 2022-07-29 | 2022-07-29 | Touch electrode and touch screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217739889U true CN217739889U (en) | 2022-11-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222002954.9U Active CN217739889U (en) | 2022-07-29 | 2022-07-29 | Touch electrode and touch screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217739889U (en) |
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- 2022-07-29 CN CN202222002954.9U patent/CN217739889U/en active Active
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