Tempered glass embedded capacitive touch key panel

Abstract

This invention relates to a tempered glass embedded capacitive touch button panel, comprising a button panel assembly. The assembly includes a tempered glass layer, a capacitive sensing layer, an insulating shielding layer, and a flexible circuit board. The capacitive sensing layer is fixedly embedded inside the tempered glass layer. The insulating shielding layer is disposed on one side surface of the capacitive sensing layer. The flexible circuit board is electrically connected to the electrode pins of the capacitive sensing layer via conductive adhesive. This invention, by fixing the capacitive sensing layer inside the tempered glass layer, abandons the traditional multi-layer adhesive stacking structure, reducing the assembly gap between layers. Compared to traditional capacitive touch button panels, it significantly reduces the overall thickness, effectively meeting the design requirements for thinner and lighter devices, while also reducing transportation costs.

Description

Technical Field

[0001] This utility model relates to the field of button panel technology, and in particular to a tempered glass embedded capacitive touch button panel. Background Technology

[0002] Currently, capacitive touch button panels mostly use glass or acrylic as the panel substrate, and capacitive sensors are usually mounted on the back of the panel by adhesive bonding.

[0003] For example, the capacitive touch display screen disclosed in Chinese utility model patent CN209297277U is composed of an insulating cover plate, a touch conductive film, a light guide plate, and a light-emitting layer, which are covered from top to bottom by adhesive.

[0004] The aforementioned capacitive touch display screens have revealed significant defects in practical applications: on the one hand, the multi-layer structure, which is superimposed with adhesive, requires the reservation of assembly gaps between components, resulting in low overall integration and a significant increase in the overall thickness of the panel, making it difficult to meet the design requirements of ultra-thin devices; on the other hand, the multi-layer structure is prone to adhesive layer failure and delamination due to external impact or temperature changes during long-term use, leading to signal transmission failure.

[0005] To address this, a tempered glass embedded capacitive touch button panel is proposed. Utility Model Content

[0006] The present invention aims to address the shortcomings of the prior art by providing a tempered glass embedded capacitive touch button panel.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a tempered glass embedded capacitive touch button panel, including a button panel assembly, the button panel assembly including a tempered glass layer, a capacitive sensing layer, an insulating shielding layer and a flexible circuit board;

[0008] The capacitive sensing layer is fixedly embedded inside the tempered glass layer, and the insulating shielding layer is set on one side surface of the capacitive sensing layer. The flexible circuit board is electrically connected to the electrode pins of the capacitive sensing layer through conductive adhesive.

[0009] Furthermore, the insulating shielding layer is a SiO2 coating, which is sprayed onto one side surface of the capacitive sensing layer.

[0010] Furthermore, all four corners of the tempered glass layer are rounded.

[0011] Furthermore, the surface of the tempered glass layer has button markings that correspond one-to-one with the electrodes in the capacitive sensing layer.

[0012] Furthermore, the thickness of the tempered glass layer is 0.8mm-1.5mm.

[0013] Furthermore, it also includes a back cover, on which a stepped groove is provided, and the button panel assembly is fixedly installed in the stepped groove.

[0014] Furthermore, a waterproof sealing strip is provided inside the stepped groove, and the waterproof sealing strip is pressed into the stepped groove by the button panel assembly.

[0015] The beneficial effects of this invention are as follows: By embedding the capacitive sensing layer inside the tempered glass layer, this invention abandons the traditional multi-layer adhesive stacking structure and reduces the assembly gap between layers. Compared with traditional capacitive touch button panels, it significantly reduces the overall thickness, effectively meeting the design requirements for thinner and lighter devices, while also reducing transportation costs and significantly enhancing the product's competitiveness in the market. Furthermore, this embedded design tightly integrates the functional layers, greatly improving the panel's integration and saving more space inside the device, facilitating the layout and installation of other components. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of the button panel assembly of this utility model;

[0018] Figure 3 This is an exploded structural diagram of the back cover of this utility model;

[0019] In the diagram: 1. Tempered glass layer; 2. Capacitive sensing layer; 3. Insulating shielding layer; 4. Flexible circuit board; 5. Button markings; 6. Waterproof sealing strip; 7. Back cover; 701. Step groove;

[0020] The accompanying drawings in this utility model are all schematic diagrams and their sizes do not represent actual dimensions.

[0021] The following will describe in detail the embodiments of this utility model with reference to the accompanying drawings. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0023] like Figures 1-3 As shown, the tempered glass embedded capacitive touch button panel includes a button panel assembly, which includes a tempered glass layer 1, a capacitive sensing layer 2, an insulating shielding layer 3, and a flexible circuit board 4. The capacitive sensing layer 2 is fixedly embedded inside the tempered glass layer 1, the insulating shielding layer 3 is disposed on one side surface of the capacitive sensing layer 2, and the flexible circuit board 4 is electrically connected to the electrode pins of the capacitive sensing layer 2 through conductive adhesive.

[0024] When a user touches the surface of the tempered glass layer 1, the human body, acting as a conductor, changes the capacitance value of the electrodes in the capacitive sensing layer 2. The capacitive sensing layer 2 is embedded within the tempered glass layer 1, effectively protecting the electrodes from external wear and ensuring stable transmission of the touch signal. An insulating shielding layer 3 covers the surface of the capacitive sensing layer 2, isolating it from external electromagnetic interference and preventing signal malfunction; it also provides insulation protection for the capacitive sensing layer 2, preventing short circuits. The capacitance change signal generated by the capacitive sensing layer 2 is transmitted through the electrode pins and conductive adhesive to the flexible circuit board 4. The flexible circuit board 4 then transmits the signal to the device's control circuit for processing, ultimately realizing the touch operation response.

[0025] In this embodiment, the capacitive sensing layer 2 forms eight closed-loop electrodes inside the tempered glass layer 1 through a screen printing process.

[0026] In this embodiment, the insulating shielding layer 3 is a SiO2 coating, which is sprayed onto one side surface of the capacitive sensing layer 2.

[0027] SiO2 possesses excellent insulation properties and a certain degree of electromagnetic shielding, which can attenuate external high-frequency electromagnetic interference and reduce interference to the signal of the capacitive sensing layer 2. When external electromagnetic interference exists, the interference signal will be reflected or absorbed by the SiO2 coating, thereby ensuring that the capacitance change signal detected by the capacitive sensing layer 2 is only caused by the user's touch operation, improving the accuracy of touch recognition.

[0028] In this embodiment, all four corners of the tempered glass layer 1 are rounded.

[0029] The tempered glass layer 1 features rounded corners, effectively reducing stress concentration. When the panel is subjected to external impact, the rounded corners distribute the impact force more evenly across the entire glass layer, preventing breakage due to excessive stress concentration at the edges and corners, thus improving the impact resistance and durability of the tempered glass layer 1. Furthermore, the rounded corner design prevents accidental bumps and injuries during actual use, enhancing the safety and comfort of the product.

[0030] In this embodiment, the surface of the tempered glass layer 1 is provided with button markings 5 ​​that correspond one-to-one with the electrodes in the capacitive sensing layer 2.

[0031] Button label 5 provides users with clear touch operation guidance, enabling them to quickly identify the touchable area.

[0032] In this embodiment, the thickness of the tempered glass layer 1 is 0.8mm-1.5mm.

[0033] The tempered glass layer 1 has a thickness of 0.8mm-1.5mm, ensuring sufficient strength while maintaining good touch sensitivity. A thinner thickness of approximately 0.8mm allows for a closer distance between the human body and the capacitive sensing layer 2 during touch operations, resulting in more noticeable capacitance changes and improved touch detection sensitivity. A thicker thickness of approximately 1.5mm enhances the panel's impact and pressure resistance, preventing the tempered glass layer 1 from cracking during use. This thickness range strikes a balance between strength and touch performance, enabling the panel to operate stably in various usage scenarios.

[0034] In this embodiment, a rear cover 7 is also included. A stepped groove 701 is provided on the rear cover 7, and the button panel assembly is fixedly installed in the stepped groove 701.

[0035] The stepped groove 701 on the back cover 7 provides a precise mounting and positioning structure for the button panel assembly, ensuring its stable installation. During installation, the button panel assembly is embedded in the stepped groove 701 and secured by a silicone layer, enhancing the overall structural stability. This prevents displacement or damage due to vibration or other reasons within the device, ensuring the normal operation of the touch panel.

[0036] Furthermore, a waterproof sealing strip 6 is provided inside the stepped groove 701, and the waterproof sealing strip 6 is pressed into the inside of the stepped groove 701 by the button panel assembly.

[0037] When the button panel assembly is installed into the stepped groove 701, the waterproof sealing strip 6 is deformed by compression and fills the gap between the panel assembly and the stepped groove 701, forming a sealing barrier. This barrier can effectively prevent external water, dust, foreign objects, etc. from entering the device, preventing damage to components such as the capacitive sensing layer 2 and the flexible circuit board 4, and avoiding problems such as short circuits and signal interference caused by moisture or dust. This improves the service life and operational reliability of the touch panel in harsh environments such as humid and dusty conditions.

[0038] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made using the inventive concept and technical solution of the present invention, or direct application to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A tempered glass embedded capacitive touch button panel, characterized in that, The key panel assembly includes a tempered glass layer (1), a capacitive sensing layer (2), an insulating shielding layer (3), and a flexible circuit board (4). The capacitive sensing layer (2) is fixedly embedded inside the tempered glass layer (1), the insulating shielding layer (3) is disposed on one side surface of the capacitive sensing layer (2), and the flexible circuit board (4) is electrically connected to the electrode pins of the capacitive sensing layer (2) through conductive adhesive.

2. The tempered glass embedded capacitive touch button panel according to claim 1, characterized in that: The insulating shielding layer (3) is a SiO2 coating, which is sprayed on one side surface of the capacitive sensing layer (2).

3. The tempered glass embedded capacitive touch button panel according to claim 1, characterized in that: All four corners of the tempered glass layer (1) are rounded.

4. The tempered glass embedded capacitive touch button panel according to claim 1, characterized in that: The surface of the tempered glass layer (1) is provided with button markings (5) that correspond one-to-one with the electrodes in the capacitive sensing layer (2).

5. The tempered glass embedded capacitive touch button panel according to claim 1, characterized in that: The thickness of the tempered glass layer (1) is 0.8mm-1.5mm.

6. The tempered glass embedded capacitive touch button panel according to claim 1, characterized in that: It also includes a back cover (7), on which a stepped groove (701) is provided, and the button panel assembly is fixedly installed in the stepped groove (701).

7. The tempered glass embedded capacitive touch button panel according to claim 6, characterized in that: A waterproof sealing strip (6) is provided inside the stepped groove (701), and the waterproof sealing strip (6) is pressed into the stepped groove (701) by the button panel assembly.

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