A touch key board and manufacturing method thereof

Abstract

The present invention discloses a touch keypad, including a touchpad as a main body and a conductive metal film as a key, and the touchpad and the conductive metal film are assembled together to form a complete touch keypad. The present invention also discloses a method for manufacturing a touch keypad, including the following steps: step 1) manufacturing a touchpad as a main body; step 2) pasting a cover sheet on each touch sensing point on the front of a substrate; step 3) manufacturing a conductive metal film as a key; step 4) setting keys according to requirements, and assembling the touchpad and the conductive metal film. Advantages: The touch keypad is divided into two parts, and the two parts are assembled together to form a complete touch keypad. Users can define the specific position of each key according to their actual needs. Through this solution, the touch control panel that originally needs to be customized can be converted into several public panels of fixed sizes, reducing the user's development cost and technical threshold.

Description

Technical Field

[0001] The invention relates to a touch key panel and a manufacturing method thereof. Background Art

[0002] As a simple and convenient way of human-computer interaction, capacitive touch screens have been widely used in various fields of our daily life, such as smart phones, smart watches, navigation systems, digital cameras, game devices, displays, electrical appliance controls, medical equipment, etc. Common touch screen technologies include resistive touch screens and capacitive touch screens for mobile devices and consumer electronics, as well as surface acoustic wave touch screens and infrared touch screens for other applications.

[0003] Capacitive touch screens have multi-touch and high sensitivity capabilities, and are not only popular in consumer electronics applications, but are also becoming increasingly popular in other fields.

[0004] With the popularity of touch screen applications, the application of various touch buttons has gradually become common. Compared with traditional mechanical buttons, touch buttons have the advantages of being more sensitive, more reliable, longer life, and more beautiful. More and more touch buttons are replacing mechanical buttons. Summary of the invention

[0005] The present invention provides a touch keypad, which is different from a conventional touch keypad in that the touch keypad structure is divided into two parts, which together form a complete touch keypad. Users can define the specific position of each key according to their actual needs. Through this solution, a touch control panel that originally needs to be customized can be converted into several public panels with fixed sizes, thereby reducing the user's development cost and technical threshold.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A touch keypad comprises a touchpad as a main body and a conductive metal film as a key, wherein the touchpad and the conductive metal film are assembled together to form a complete touch keypad;

[0008] The conductive metal film is composed of a layer of metal film and a layer of conductive double-sided adhesive;

[0009] A plurality of touch sensing points are arranged on the front of the touch panel, each of which is a circle and arranged vertically and horizontally at a certain distance from each other; wiring is arranged on the back of the touch panel to form a control circuit; each touch sensing point is covered with a conductive metal film, and the conductive double-sided adhesive of the conductive metal film is bonded to the touch sensing point.

[0010] In an improvement to the technical solution of the present invention, the touch panel uses a double-layer PCB board as a substrate.

[0011] An improvement on the technical solution of the present invention is that when the touch panel and the conductive metal film are not assembled, a cover sheet is pasted on each touch sensing point of the touch panel, and the cover sheet is bonded to the touch sensing point by double-sided adhesive.

[0012] The improvement of the technical solution of the present invention is that the cover sheet is composed of a double-sided adhesive layer, a conductive layer and an insulating layer, the conductive layer is located between the double-sided adhesive layer and the insulating layer, and the double-sided adhesive layer is bonded to the touch sensing point. If the touch sensing point is exposed, it still has a sensing amount after being touched, which may cause an accidental touch, so a cover sheet needs to be attached to each sensing point to prevent accidental touch; the structure of the cover sheet is divided into 3 layers, one layer is double-sided adhesive (the cover sheet is bonded to the touch sensing point through the double-sided adhesive), one layer is a conductive material that plays a shielding role, and there is a layer of insulating material on the surface of the conductive material. Each sensing point is covered by a cover sheet.

[0013] In an improvement to the technical solution of the present invention, the horizontal center distance and the vertical center distance between two adjacent touch sensing points are both 10 mm.

[0014] An improvement on the technical solution of the present invention is that the radius of the touch sensing point is 1 mm.

[0015] In an improvement to the technical solution of the present invention, the outermost touch sensing point is a distance away from the edge of the touch panel.

[0016] According to an improvement to the technical solution of the present invention, the outermost touch sensing point is at least 5 mm away from the edge of the touch panel.

[0017] The present invention also provides a method for manufacturing a touch keypad, comprising the following steps:

[0018] Step 1) making a touch panel as a main body, selecting a double-layer PCB board as a substrate, setting a plurality of touch sensing points on the front side of the substrate, and arranging wiring for each touch sensing point on the back side of the substrate to form a control circuit;

[0019] Step 2) pasting a cover sheet on each touch sensing point on the front side of the substrate;

[0020] Step 3) making a conductive metal film for use as a key;

[0021] Step 4) setting buttons according to requirements, assembling touch panel and conductive metal film; tearing off the cover sheet pasted on the touch sensing point, and pasting the conductive metal film on the touch sensing point.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The touch keypad of the present invention is different from the conventional touch keypad in that the touch keypad structure is divided into two parts, which together form a complete touch keypad. The user can define the specific position of each key according to his actual needs. Through this solution, the touch control panel that originally needs to be customized can be converted into several public panels with fixed sizes, thereby reducing the user's development cost and technical threshold. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is the main view of the keypad.

[0025] Figure 2 This is the front view of the cover.

[0026] Figure 3 It is a side view of the cover.

[0027] Figure 4 is a side view of a conductive metal film.

[0028] Figure 5 It is a schematic diagram of a slider.

[0029] Figure 6 This is the main view of the touch key panel. DETAILED DESCRIPTION

[0030] The technical solution of the present invention is described in detail below, but the protection scope of the present invention is not limited to the embodiments.

[0031] To make the content of the present invention more clearly understood, the following Figure 1-Figure 6 The specific implementation manner is further described.

[0032] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0033] like Figure 1 As shown, the touch key panel in this embodiment includes a touch panel 1 as a main body and a conductive metal film 5 used as a key. The touch panel and the conductive metal film are assembled together to form a complete touch key panel.

[0034] like Figure 1 As shown, the touch panel 1 body preferably uses a PCB board as a substrate. The touch panel can be round, square, rectangular, etc. The PCB board is a double-layer board, and multiple touch sensing points 2 are arranged on the front. The size of each point on the board is a circle with a radius of 1mm, and each point is arranged vertically and horizontally at a distance of 10mm. The back is the wiring and control circuit of the corresponding touch sensing point.

[0035] In this embodiment, the back side has the wiring and control circuits of the corresponding touch sensing points. The wiring and control circuits mentioned here are known technologies in the technical field, and are the same as the wiring and control circuits of a general traditional touch keypad.

[0036] like Figure 2 and 3 As shown, if the touch sensing point is exposed, it still has a sensed amount after being touched, which may cause an accidental touch. Therefore, a cover sheet 3 needs to be attached to each sensing point to prevent an accidental touch. The structure of the cover sheet is divided into three layers, one layer is a double-sided adhesive 3-1 (the cover sheet is adhered to the touch sensing point through the double-sided adhesive), and one layer is a conductive material 3-2 for shielding. There is a layer of insulating material 3-3 on the surface of the conductive material. Each touch sensing point 2 is covered by a cover sheet 3.

[0037] like Figure 4 As shown, the conductive metal film 5 is composed of a metal film 5-1 and a conductive double-sided adhesive 5-2, which ensures that the metal film has longitudinal conductivity. The metal conductive film can be cut into any size with scissors. The user cuts out a suitable metal conductive film according to his needs, then peels off the cover sheet at the corresponding position and sticks the cut metal conductive film on, thus forming a complete touch key control panel.

[0038] The present invention also provides a method for manufacturing a touch keypad, comprising the following steps:

[0039] Step 1) making a touch panel as a main body, selecting a double-layer PCB board as a substrate, setting a plurality of touch sensing points on the front side of the substrate, and arranging wiring for each touch sensing point on the back side of the substrate to form a control circuit;

[0040] Step 2) pasting a cover sheet on each touch sensing point on the front side of the substrate;

[0041] Step 3) making a conductive metal film for use as a key;

[0042] Step 4) setting buttons according to requirements, assembling touch panel and conductive metal film; tearing off the cover sheet pasted on the touch sensing point, and pasting the conductive metal film on the touch sensing point.

[0043] Example 1

[0044] We further illustrate the design of a square touch keypad with a side length of 70 mm.

[0045] On this board, we can arrange 6*6 touch sensing points. The horizontal and vertical distances of each touch sensing point are 10mm (center distance), and the distance between each touch sensing point and the edge is at least 5mm. If the sensing point of this size is exposed, it will still have a sense of touch after being touched, which may cause false touches. Therefore, a cover sheet (such as Figure 2 Each touch sensing point is covered by a cover sheet.

[0046] Suppose we need to design five buttons and a slider on this touch panel. Touch buttons and sliders can be cut on a large piece of conductive metal film ( Figure 4 The size of the touch button is generally less than 10mm*10mm, and can be square, rectangular, circular, triangular, etc. The shape design of the slider is as follows Figure 5 As shown in the figure, each slider is composed of at least three identical patterns. Tear off the cover sheet at the corresponding position and stick the conductive film of the button block and slider block to the corresponding sensing point, and a touch control panel is completed. Figure 6 shown.

[0047] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes in form and details may be made without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A touch keypad, characterized in that: It includes a touch panel as a main body and a conductive metal film as a key, and the touch panel and the conductive metal film are assembled together to form a complete touch key panel; The conductive metal film is composed of a layer of metal film and a layer of conductive double-sided adhesive; A plurality of touch sensing points are arranged on the front of the touch panel, each of which is a circle and arranged vertically and horizontally at a certain distance from each other; wiring is arranged on the back of the touch panel to form a control circuit; a conductive metal film is covered on each touch sensing point, and the conductive double-sided adhesive of the conductive metal film is bonded to the touch sensing point; When the touch panel and the conductive metal film are not assembled, a cover sheet is pasted on each touch sensing point of the touch panel, and the cover sheet is adhered to the touch sensing point by double-sided adhesive; The cover sheet is composed of a double-sided adhesive layer, a conductive layer and an insulating layer, wherein the conductive layer is located between the double-sided adhesive layer and the insulating layer, and the double-sided adhesive layer is bonded to the touch sensing point; The touch panel uses a double-layer PCB as the substrate.

2. The touch key board according to claim 1, characterized in that: The horizontal center distance and the vertical center distance between two adjacent touch sensing points are both 10 mm.

3. The touch key board according to claim 1, characterized in that: The radius of the touch sensing point is 1mm.

4. The touch key board according to claim 1, characterized in that: The outermost touch-sensitive points are located some distance from the edge of the touchpad.

5. The touch key board according to claim 4, characterized in that: The outermost touch sensing point is at least 5 mm away from the edge of the touchpad.

6. The method for manufacturing a touch key panel according to any one of claims 1 to 5, characterized in that: The steps include: Step 1) Make a touch panel as the main body, select a double-layer PCB board as the substrate, set multiple touch sensing points on the front of the substrate, and arrange wiring for each touch sensing point on the back of the substrate to form a control circuit; Step 2) affixing a cover sheet to each touch sensing point on the front side of the substrate; Step 3) making a conductive metal film for use as a key; Step 4) Set the buttons according to the requirements, assemble the touch panel and the conductive metal film; tear off the cover sheet pasted on the touch sensing point, and paste the conductive metal film on the touch sensing point.

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