Projected capacitive touch panel button structure

Abstract

To provide a projected capacitive touch panel button structure disposed on a touch screen.SOLUTION: A projected capacitive touch panel button structure comprises: a button body 20 disposed on a touch screen; a touch capacitive sheet 10 disposed on the touch screen and located inside the button body 20; a conductive rubber 30 disposed in the button body 20 and including a contact portion 31 that can come into contact with the touch capacitive sheet 10; and a button cap 40 including a connecting body 41 disposed above the conductive rubber 30 and a cover body 42 protruding outward from the button body 20. When the button cap 40 is pressed, the contact portion 31 comes into contact with the touch capacitive sheet 10, and the conductive rubber 30 and the touch capacitive sheet 10 become conductive, causing the touch screen A to generate an input signal.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present application relates to a button structure for a projected capacitive touch panel, and more particularly to a button structure for a projected capacitive touch panel that provides physical button feedback on a touch screen. [Background technology]

[0002] In the prior art, when adding a button to a panel, a mold for the button addition location had to be created according to the mechanism of the button addition location, and the new button could be added by installing a circuit accordingly. This resulted in a significant increase in the cost of adding a button, and limited the types of buttons that could be added depending on the use of the panel.

[0003] Furthermore, existing buttons require the combination of multiple layers of sensing film to smoothly sense the input signal generated when the button is pressed. The design mechanism of the multiple layers of sensing film causes complex changes in sensing capacitance, which often leads to errors in determining whether the button is pressed or not.

[0004] In light of this, it is necessary to provide a button structure for a projected capacitive touch panel that can solve the above technical problems. Summary of the Invention [Problem to be solved by the invention]

[0005] In order to solve the above-mentioned problems of the prior art, the object of the present application is to provide a button structure for a projected capacitive touch panel that can improve the accuracy of button signal detection and signal output without restricting the use scenario of the panel by adding a button to the panel. [Means for solving the problem]

[0006] In a first aspect, the present application provides a button structure for a projected capacitive touch panel disposed on a touchscreen, the button structure including: a button body disposed on the touchscreen; a capacitive touch sheet disposed on the touchscreen and located inside the button body; a conductive rubber disposed in the button body and having a contact portion capable of contacting the capacitive touch sheet; a connecting body disposed above the conductive rubber; and a button cap having a cover body protruding from the button body, wherein when the button cap is pressed, the contact portion comes into contact with the capacitive touch sheet, establishing electrical conduction between the conductive rubber and the capacitive touch sheet, thereby generating an input signal on the touchscreen.

[0007] In some embodiments of the present application, the button body has an accommodation space at its upper part, and when the conductive rubber is in a stretched state, the upper part of the conductive rubber is located within the accommodation space.

[0008] In some embodiments of the present application, when the contact portion contacts the touch capacitive sheet, the connecting body protrudes downward outside the receiving space, and the upper part of the button body is received within the cover body.

[0009] In some embodiments of the present application, when the conductive rubber is in a stretched state, a part of the connector protrudes outside the accommodation space.

[0010] In some embodiments of the present application, a slide rail structure is provided between the button cap and the button body, and the button cap moves up and down along the slide rail structure.

[0011] In some embodiments of the present application, the slide rail structure has at least one rail and at least one body, the rail is disposed on the connecting body, and the body is disposed in the receiving space above the button body.

[0012] In some embodiments of the present application, the touch screen further includes a rubber mounting portion disposed on the touch screen and surrounding the touch capacitive sheet, and the lower portion of the conductive rubber is disposed on the rubber mounting portion.

[0013] In some embodiments of the present application, when the contact portion contacts the touch capacitive sheet, the conductive rubber is pressed to form a compression protrusion, which contacts the compression contact portion on the inner wall of the button body.

[0014] In some embodiments of the present application, the conductive rubber has an extended edge when in a stretched state, thereby contacting the extended contact portion on the inner wall of the button body.

[0015] In some embodiments of the present application, the button body is a hollow frustum-shaped structure, the conductive rubber is disposed at the bottom of the button body, and the bottom of the button body surrounds the touch capacitive sheet and contacts the touch screen. [Effects of the Invention]

[0016] Compared with the prior art, this application provides the following button structure for a projected capacitive touch panel: a capacitive touch sheet and conductive rubber are provided between the touch screen and the button cap, and an input signal is generated on the touch screen by electrically connecting the conductive rubber and the capacitive touch sheet. In this way, a simplified button element is used to provide physical tactile feedback on the touch screen and ensure accurate recognition of output signals, while solving the technical problem of frequent errors in determining whether a button has been pressed.

[0017] In order to make the purpose, technical contents, features, and effects of the present application more easily understandable, specific embodiments will be described in detail below with reference to the accompanying drawings. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is an exploded schematic view of a button structure of a projected capacitive touch panel according to an embodiment of the present application; FIG. [Figure 2] 1 is a schematic diagram of a button structure of a projected capacitive touch panel in an extended state according to an embodiment of the present application; FIG. [Figure 3] 1 is a schematic diagram of a button structure of a projected capacitive touch panel according to an embodiment of the present application in a half-stroke pressed state; FIG. [Figure 4] 1 is a schematic diagram of a pressed button structure of a projected capacitive touch panel according to an embodiment of the present application; FIG. [Figure 5] FIG. 10 is a schematic diagram of a pressed button structure of a projected capacitive touch panel according to another embodiment of the present application; DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, the technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present application. However, it should be apparent that the described embodiments are only a part, not all, of the embodiments of the present application. Furthermore, it should be understood that the specific embodiments described in this specification are for the purpose of explaining and analyzing the present application, and are not intended to limit the present application. Referring to the accompanying drawings, the same element symbols represent the same elements.

[0020] First, referring to FIG. 1 , the button structure of the projected capacitive touch panel provided by the present application comprises a capacitive touch sheet 10, a button body 20, a conductive rubber 30, and a button cap 40. By combining the button body 20 and the conductive rubber 30, the button structure of the projected capacitive touch panel provided by the present application can provide the user with the same tactile feedback as a physical button, without the need for an additional honeycomb spring. Furthermore, this button structure does not require a guide bush; the button body 20 and the button cap 40 are directly combined to move the conductive rubber 30 up and down. Therefore, the technical effects of quiet operation and low structural loss can be achieved without the need for an additional silent ring. Detailed features of the button structure of the projected capacitive touch panel provided by the present application are disclosed below.

[0021] Please refer to Figures 2 to 4. Figures 2 to 4 are cross-sectional views of the button structure of the projected capacitive touch panel of the present application in an unpressed state, a half-stroke pressed state, and a full-stroke pressed state, respectively.

[0022] 2, the button structure of the projected capacitive touch panel provided by the present application and disposed on a touchscreen A includes a button body 20 disposed on the touchscreen A, a capacitive touch sheet 10 disposed on the touchscreen A and located inside the button body 20, conductive rubber 30 disposed within the button body 20 and having a contact portion 31 on the side adjacent to the upper capacitive touch sheet 10 that can come into contact with the capacitive touch sheet 10 when pressed, and a button cap 40 having a connecting body 41 disposed above the conductive rubber 30 and a cover body 42 protruding outside the button body 20. When the button cap 40 is pressed, the contact portion 31 comes into contact with the capacitive touch sheet 10, establishing electrical conduction between the conductive rubber 30 and the capacitive touch sheet 10, thereby generating an input signal on the touchscreen A.

[0023] In some embodiments of the present application, the button body 20 has a truncated cone-shaped structure, and the interior thereof is hollow to accommodate the conductive rubber 30. A storage space 21 for vertically moving the conductive rubber 30 and the button cap 40 is further provided between the top of the button body 20 and the hollow region of the interior. The storage space 21 connects the outside of the button body 20 with the space in which the conductive rubber 30 is accommodated. When the conductive rubber 30 is in a stretched state, the top of the conductive rubber 30 is located within the storage space 21.

[0024] The material of the conductive rubber 30 in this application includes a rubber material and a conductive material. The rubber material allows the conductive rubber 30 to withstand multiple up and down deformations and has good elasticity and abrasion resistance, allowing the conductive rubber 30 to perform the function of pushing back the button cap 40 and pressing the button body 20. Materials for the conductive rubber 30 include ethylene propylene rubber (Ethylene Propylene Diene Monomer, EPDM), ethylene / acrylic elastomer (AEM), styrene-butadiene rubber (Styrene-Butadiene Rubber, SBR), butyl rubber (Isobutylene Isoprene Rubber, IIR), nitrile rubber (Nitrile Butadiene Rubber, NBR), natural rubber (NR), silicone rubber (Silicone), fluororubber (FKM, FPM, VITON), hydrogenated nitrile rubber (HNBR), chloroprene rubber (CR), carboxylated nitrile rubber (XNBR), polyacrylate (ACM), polyester polyurethane (AU), polyether polyurethane (EU), and epichlorohydrin rubber (ECO).

[0025] The conductive material is used to provide the conductive rubber 30 with good conductivity. The touch screen A is configured to receive an output signal from the button structure when the conductive rubber 30 contacts the capacitive touch sheet 10. The conductive material includes carbon black, carbon nanotubes (CNTs), and metal powder. Alternatively, the conductive material may be particles containing both a conductive polymer and metal powder. In some embodiments provided by the present application, the conductive material is uniformly distributed within the conductive rubber 30. Alternatively, in other embodiments provided by the present application, the distribution of the conductive material in the contact portion 31 is denser than in other regions of the conductive rubber 30 to improve the conductivity of the conductor formed when the conductive rubber 30 contacts the capacitive touch sheet 10.

[0026] In one embodiment provided by the present application, when the contact portion 31 contacts the touch capacitive sheet 10, the connector 41 protrudes downward and out of the accommodating space 21. Alternatively, in another embodiment provided by the present application, when the contact portion 31 contacts the touch capacitive sheet 10, the connector 41 protrudes downward and out of the accommodating space 21, and at this time, the upper part of the button body 20 is accommodated in the cover body 42, thereby stabilizing the relative positional relationship between the connector 41 and the button body 20. Furthermore, in another embodiment provided by the present application, the ratio of the length of the accommodating space 21 to the length of the connector 41 is 1:2 to 1:1, thereby maintaining stability in the movement of the button cap 40 and the conductive rubber 30 relative to the button body 20.

[0027] In one embodiment provided by the present application, the button structure provided by the present application has a slide rail structure between the button cap 40 and the button body 20, and the button cap 40 is configured to move up and down along the slide rail structure. The rail and the body of the slide rail structure are arranged at a distance from each other on the button cap 40 and the button body 20, and the button cap 40 and the button body 20 move within a predetermined relative range within the accommodation space 21, thereby forming the slide rail structure.

[0028] In another embodiment provided by the present application, the sliding rail structure includes at least one rail and at least one body, and the rail and body are respectively disposed on the connecting body 41 and in the receiving space 21 above the button body 20. Therefore, the button structure provided by the present application allows the button cap 40 to slide upward along the sliding rail structure due to the restoring force of deformation of the conductive rubber 30 after it is pressed, and restores the button cap 40 from the full-stroke pressed state shown in FIG. 4 to the unpressed state shown in FIG. 2.

[0029] Continuing to refer to Figure 2, when the conductive rubber 30 is in an extended state, a portion of the connecting body 41 protrudes outside the receiving space 21. At this time, there is a further gap between the cover body 42 and the receiving space 21 to provide a longer button depression stroke and provide a noticeable physical button feedback to the user.

[0030] In another embodiment provided by the present application, the button structure provided by the present application further includes a rubber mounting portion I disposed on the touch screen A. The rubber mounting portion I surrounds the touch capacitive sheet 10, and the lower portion of the conductive rubber 30 is disposed on the rubber mounting portion I. By disposing the rubber mounting portion I in the button structure provided by the present application, a more stable button structure is provided.

[0031] In a further embodiment provided by the present invention, the extended edge 32 of the conductive rubber 30 in the extended state contacts the extended contact portion 22 on the inner wall of the button body 20. Therefore, when the button structure is in the extended state, the conductive rubber 30 is pressed against the extended contact portion 22, making the button cap 40 stable and not swing parallel.

[0032] Alternatively, in a further embodiment of the present application, the button body 20 has a rectangular connecting body structure as shown in FIG. 1 , and the conductive rubber 30 has a rectangular base and can be accommodated within the button body 20. In this embodiment, the conductive rubber 30 includes pot-shaped bodies with different radii at different heights. The radius of the upper part of the conductive rubber 30 is smaller than the radius of the lower part of the pot-shaped body, and the connecting body of the button cap 40 contacts the upper part of the conductive rubber 30. Similarly, the deformation and restoring forces of the conductive rubber 30 cause the button cap 40 to move up and down. In this embodiment, because the conductive rubber 30 has a pot-shaped structure, when the button cap 40 is pressed down, the radius of the pot body side of the conductive rubber 30 is longer, reducing the amount of protruding deformation when pressed. Therefore, the pressing force from the conductive rubber 30 on the button body 20 is smaller, and the conductive rubber 30 can have a longer service life. Additionally, in this embodiment, the lower portion of the conductive rubber 30 is configured as a rectangular lower portion that is aligned with the button body 20 and is disposed at the bottom of the button body 20. Therefore, the structure of the button body 20 and the conductive rubber 30 can be stabilized using the lower portion of the button body 20. Alternatively, the lower portion of the conductive rubber 30 is configured as a rectangular lower portion that is aligned with the button body 20, and the lower portion of the conductive rubber 30 comes into contact with the touch screen A, and forms a button area on the touch screen A where the capacitance value changes due to the attachment portion of the conductive rubber 30. This allows the touch screen A to have a more clearly distinguishable arrangement range of the button structure.

[0033] Continuing to refer to Fig. 4, in another embodiment provided by the present application, when the contact portion 31 contacts the touch capacitive sheet 10, the compressed protrusion 33 formed by pressing the conductive rubber 30 contacts the compressed contact portion 23 on the inner wall of the button body 20. In another embodiment provided by the present invention, since the thickness of the compressed contact portion 23 is smaller than the thickness of the other parts of the button body 20, a space is formed inside the button body 20 to accommodate the compressed contact portion 23, and the pressing stability of the button structure is improved.

[0034] In another embodiment provided by the present invention, when the button body 20 is a frustum, the expansion contact portion 22 on the inner wall of the button body 20 is higher than the compression contact portion 23. Therefore, when the button structure is in an expansion state, the force receiving point that stabilizes the horizontal position of the button cap 40 is located close to the button cap 40, and when the contact portion 31 contacts the touch capacitive sheet 10, the compression contact portion 23 is accommodated in a position close to the touch capacitive sheet 10. Therefore, the stability of the button structure provided by the present application can be further improved.

[0035] Further, please refer to FIG. 5. FIG. 5 shows another embodiment provided by the present application. As shown in FIG. 5, the button body 20 has a hollow truncated cone structure, and the conductive rubber 30 is disposed at the bottom of the button body 20. The bottom of the button body 20 surrounds the touch capacitive sheet 10 and contacts the touch screen A. In this embodiment, the conductivity of the button body 20 is lower than that of the conductive rubber 30, and the conductive rubber 30 contacts only the button body 20, not the touch screen A. Therefore, when the conductive rubber 30 receives a force and is activated, the capacitance of the touch screen A does not change, and the accuracy of the output signal of the button structure is improved.

[0036] The button structure of the projected capacitive touch panel provided by the present application allows the touch capacitive sheet 10, button body 20, conductive rubber 30, and button cap 40 to be directly disposed on the touch screen A, so that the application scenarios for adding buttons are not limited by the mold and matching circuitry that is required for buttons on conventional panels. For example, the button structure of the projected capacitive touch panel provided by the present application can be directly attached to panels for various applications, such as advertising panels, automobile dashboards, tablet computers, washing machines, and ATM interfaces, and the addition of buttons can be completed without additional modification of the sensing circuitry within the panel and the external mold.

[0037] The present application has at least the following beneficial effects: The present application provides a button structure for a projected capacitive touch panel, which arranges a capacitive touch sheet and conductive rubber between a touch screen and a button cap, and allows the capacitive touch sheet to communicate with the conductive rubber to generate an input signal on the touch screen. This achieves the technical effect of providing physical tactile feedback to the touch screen using a simplified button element, ensuring accurate recognition of output signals, and simultaneously solving the technical problem of frequent errors in determining whether a button has been pressed.

[0038] The combination of each element in the present application preferably forms the above-mentioned multiple embodiments, but should not be construed as a limitation on the present application, i.e., each element in the present application can have more combinations and is not limited to the above-mentioned multiple embodiments.

[0039] Although the present specification uses specific examples to describe the principles and embodiments of the present application, the description of the above embodiments is only for understanding the technical solutions of the present application and their core ideas. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the above embodiments, or equivalent substitutions can be made to some technical features thereof, and these modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application. [Explanation of symbols]

[0040] A. Touchscreen I Rubber mounting part 10 Touch Capacitive Sheet 20 Button body 21 Containment Space 22 Extension contact part 23 Compression contact area 30 Conductive rubber 31 Contact part 32 Extension Edge 33 Compression protrusion 40 Button Cap 41 Concatenation 42 Cover body

Claims

1. A button structure of a projected capacitive touch panel disposed on a touch screen, comprising: a button body disposed on the touch screen; a touch capacitive sheet disposed on the touch screen and positioned inside the button body; a conductive rubber member disposed within the button body and having a contact portion that can come into contact with the touch capacitive sheet; a button cap having a connecting body disposed above the conductive rubber and a cover body protruding outward from the button body; Equipped with When the button cap is pressed, the contact portion comes into contact with the touch capacitive sheet, and the conductive rubber and the touch capacitive sheet are electrically connected, thereby generating an input signal on the touch screen; The button body has a hollow truncated cone structure, the conductive rubber is disposed at a lower part of the button body, and the lower part of the button body surrounds the touch capacitive sheet and contacts the touch screen. Projected capacitive touch panel button structure.

2. The button body has an accommodation space above it, When the conductive rubber is in a stretched state, an upper portion of the conductive rubber is located within the accommodation space. The button structure of a projected capacitive touch panel according to claim 1 .

3. When the contact portion contacts the touch capacitive sheet, the connecting body protrudes downward outside the receiving space, and an upper portion of the button body is received within the cover body. The button structure of a projected capacitive touch panel according to claim 2 .

4. When the conductive rubber is in the stretched state, a part of the connector protrudes outside the accommodation space. The button structure of a projected capacitive touch panel according to claim 2 .

5. A slide rail structure is provided between the button cap and the button body, The button cap moves up and down along the slide rail structure. The button structure of a projected capacitive touch panel according to claim 1 .

6. The slide rail structure includes at least one rail and at least one body; The rail is disposed on the connecting body, and the main body is disposed in the receiving space above the button body. The button structure of a projected capacitive touch panel according to claim 5 .

7. When the contact portion comes into contact with the touch capacitive sheet, the conductive rubber is pressed to form a compressed protrusion, which comes into contact with the compressed contact portion on the inner wall of the button body. The button structure of a projected capacitive touch panel according to claim 1 .

8. The conductive rubber has an extended edge portion when in an extended state, so that the conductive rubber contacts the extended contact portion on the inner wall of the button body. The button structure of a projected capacitive touch panel according to claim 1 .

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