Buffer touchpad with static icon

Abstract

A kind of static icon's buffer touchpad, install on control device, the installation chamber is opened on the control device, the buffer touchpad can be detachably installed in the installation chamber, the buffer touchpad includes circuit substrate, support plate is also installed on the circuit substrate by connecting column, composite frame is arranged on the support plate, touch component is installed in the composite frame, the touch component is transparent layer structure, five layers of transparent touch layer are glued in the multistage step of composite frame in the scheme, and are installed layer by layer, structure is more compact;Wherein protective layer can reduce touch damage, buffer layer uses the double shock-absorbing design of spring and silica gel support column, solve the pain point that traditional resistance touch screen is easily damaged, icon layer can show different static icons under the action of backlight layer, finally diamond grid on resistance sensing layer can directly locate touch point coordinates by resistance change, and information is transmitted to circuit substrate, realizes touch control.

Description

Technical Field

[0001] This utility model relates to the field of touch technology, and in particular to a buffer touchpad with static icons. Background Technology

[0002] Touchscreens or touch panels with icon indicators typically refer to display devices that integrate a graphical user interface (GUI) and touch functionality. These devices are widely used in smartphones, tablets, kiosks, industrial control systems, and other fields.

[0003] The most common types of touchpads in existing technology are resistive and capacitive. Resistive touchpads are suitable for industrial control, while capacitive touchpads are suitable for precision touch control, such as in mobile phones and tablets. Industrial resistive touchpads generally have a simpler structure, typically consisting of a protective layer and a resistive layer. However, the protective layer in this design is easily damaged, and changes in touch pressure can easily damage the underlying precision layer, i.e., the resistive layer, leading to a reduced lifespan and, in severe cases, affecting touch sensitivity. Utility Model Content

[0004] To overcome the aforementioned technical deficiencies, this utility model adopts the following technical solution:

[0005] A buffered touchpad with static icons is installed on a control device. The control device has an installation chamber in which the buffered touchpad is detachably installed. The buffered touchpad includes a circuit board, and a support plate is mounted on the circuit board via connecting posts. A composite frame is provided on the support plate. The composite frame has multiple stepped layers inside. A touch component is installed within the composite frame. The touch component has a transparent layered structure and, from top to bottom, includes a protective layer, a buffer layer, an icon layer, a backlight layer, and a resistive sensing layer, decreasing in size from top to bottom. The icon layer, backlight layer, and resistive sensing layer are electrically connected to the composite frame, and the composite frame is also electrically connected to the circuit board via leads.

[0006] Preferably, the support plate is also electrically connected to the circuit board via multiple pins, and the lower surface of the support plate is provided with multiple spaced heat-conducting fins.

[0007] Preferably, the composite frame is made of metal, and each step consists of a protective layer, a buffer layer, an icon layer, a backlight layer, and a resistive sensing layer, which are applied sequentially from top to bottom. The protective layer is made of nano-coated or coated conductive glass with a thickness of 0.3-0.5 mm.

[0008] Preferably, the buffer layer is made of silicone or a transparent elastic plate with a thickness of 0.8-1.2 mm, and is located below the protective layer. Multiple springs are arranged along the lower edge of the buffer layer, and one end of each spring is in contact with the corresponding step.

[0009] Preferably, the lower surface of the buffer layer is further provided with a plurality of uniformly distributed silicone pillars, and each silicone pillar is made of an elastic and transparent material.

[0010] Preferably, the backlight layer consists of a diffusion layer, a light guide layer, and a reflective layer from top to bottom. A diffuser sheet and a prism sheet are stacked on the diffusion layer, and multiple scattering dots are distributed on the upper surface of the light guide layer. A groove is also formed on the side of the light guide layer, and an LED light strip is set in the groove. Transparent silicone is also filled between the lower surface of the light guide layer and the emitting layer.

[0011] Preferably, the resistance sensing layer includes an upper conductive layer, an insulating layer, and a lower conductive layer. The upper conductive layer and the lower conductive layer are respectively provided with multiple columns of diamond-shaped grids. Each column of diamond-shaped grids is connected together, and the diamond-shaped grids on the upper conductive layer and the diamond-shaped grids on the lower conductive layer are staggered. The insulating layer is located between the two and has multiple insulating points evenly distributed on it.

[0012] Preferably, the bottom of the buffer layer is an icon layer with a thickness of 0.7-1.2mm. The icon layer has a two-layer structure, consisting of an optional lens layer and a substrate layer from top to bottom.

[0013] Preferably, the substrate layer is a rigid transparent material with a thickness of 0.5-1.0 mm, and the lower surface of the substrate layer is provided with an icon area and a non-icon area, wherein different static icons are printed in the icon area using light-shielding ink.

[0014] Preferably, the optional lens layer is located on the upper surface of the substrate layer and is a microlens array film used to diffuse backlight.

[0015] The beneficial effects of this utility model are as follows:

[0016] This solution uses a multi-step design within a composite frame to glue five transparent touch layers, installing them layer by layer for a more compact structure. Secondly, the top-to-bottom arrangement includes a protective layer, a buffer layer, an icon layer, a backlight layer, and a resistive sensing layer, each with its own function. The protective layer reduces touch damage, while the buffer layer employs a dual shock-absorbing design with springs and silicone supports, addressing the vulnerability of traditional resistive touchscreens. The icon layer, illuminated by the backlight layer, displays different static icons for more intuitive operation. Finally, the diamond-shaped grid on the resistive sensing layer directly locates the touch point coordinates through resistance changes and transmits this information to the circuit board, enabling touch control. Attached Figure Description

[0017] Figure 1 This is an installation diagram of the present invention;

[0018] Figure 2 A three-dimensional structural diagram of the buffer touchpad;

[0019] Figure 3 A partial explosion diagram from another perspective of the buffer touchpad;

[0020] Figure 4 This is a schematic diagram of the exploded structure of the touch component;

[0021] Figure 5 This is a side view of the touch component.

[0022] Figure 6 for Figure 5 Enlarged structural diagram of section A in the middle;

[0023] Figure 7 This is an enlarged structural diagram of part B in section 5;

[0024] Figure 8 This is a schematic diagram of the lower surface structure of the buffer layer;

[0025] Figure 9 This is a schematic diagram of the lower surface structure of the icon layer;

[0026] Figure 10 This is a schematic diagram of the internal structure of the resistive sensing layer;

[0027] In the diagram: mounting chamber 1, buffer touchpad 2, circuit board 20, connecting post 21, support plate 22, composite frame 23, touch component 24, protective layer 240, buffer layer 241, icon layer 242, backlight layer 243, resistive sensing layer 244, lead wire 25, pin 26, heat-conducting fin 27, spring 2410, silicone support 2411, diffusion layer 2430, light guide layer 2431, reflective layer 2432, diffuser sheet 2433, prism sheet 2434, groove 2435, LED light strip 2436, upper conductive layer 2440, insulating layer 2441, lower conductive layer 2442, diamond grid 2443, insulating point 2444, optional lens layer 2420, substrate layer 2421, icon area 2422, and non-icon area 2423. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0029] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0030] Example 1:

[0031] See Figure 1-10 A buffer touchpad with static icons is installed on a control device, which includes various devices that use touchpads. The control device has an installation chamber 1, within which the buffer touchpad 2 is detachably installed. The buffer touchpad 2 is detachable and includes a circuit board 20. Various electronic components, including a control chip and a main controller, are integrated beneath the circuit board 20. A support plate 22 is mounted on the circuit board 20 via four connecting posts 21. The support plate 22 is mounted on the circuit board 20. A composite frame 23 is provided on the support plate 22, and the composite frame 23 has multiple stepped levels, each level... Different structures are glued onto the steps. The composite frame 23 is equipped with a touch component 24, which is a transparent layered structure, specifically five layers stacked. The stepped structure not only ensures the stability of each layer installation, but also avoids shadows in local areas or at the edges when projecting icons due to the design of decreasing size from top to bottom. From top to bottom, it includes a protective layer 240, a buffer layer 241, an icon layer 242, a backlight layer 243, and a resistive sensing layer 244, which decrease in size from top to bottom. The icon layer 242, the backlight layer 243, and the resistive sensing layer 244 are electrically connected to the composite frame 23, and the composite frame 23 is also electrically connected to the circuit board 20 through a lead wire 25.

[0032] See Figure 2-3 The support plate 22 is also electrically connected to the circuit board 20 through multiple pins 26. The lower surface of the support plate 22 is also provided with multiple spaced heat-conducting fins 27. The heat-conducting fins 27 mainly dissipate heat from the circuit board 20. Compared with the traditional method of integrating into the circuit board 20, the heat interference to other components is reduced.

[0033] See Figure 4The composite frame 23 is made of metal, and each step is sequentially glued with a protective layer 240, a buffer layer 241, an icon layer 242, a backlight layer 243, and a resistive sensing layer 244 from top to bottom. The protective layer 240 is a nano-coated or coated conductive glass with a thickness of 0.3-0.5mm. The protective layer 240 can reduce the damage to the touchpad 2 during touch. Its steel wool test can reach 5000 times without permanent scratches.

[0034] The buffer layer 241 is made of silicone or a transparent elastic plate with a thickness of 0.8-1.2 mm and is located below the protective layer 240. Multiple springs 2410 are arranged along the lower edge of the buffer layer 241, and one end of each spring 2410 is in contact with the corresponding step. The buffer layer 241 mainly absorbs impact energy, and the array of springs 2410 below disperses the point pressure into a surface load. In contrast, the existing technology directly applies the protective screen to the backlight layer 243 or the resistive sensing layer 244, which reduces the risk of film layer dent.

[0035] See Figure 5 The lower surface of the buffer layer 241 is also provided with a plurality of uniformly distributed silicone pillars 2411, and each silicone pillar 2411 is made of elastic transparent material. By absorbing impact energy through the elastic silicone pillars 2411, the backlight layer 243 and the resistive sensing layer 244 below can be better protected.

[0036] See Figure 5-6 The backlight layer 243 consists of a diffusion layer 2430, a light guide layer 2431, and a reflective layer 2432, arranged sequentially from top to bottom. A diffuser sheet 2433 and a prism sheet 2434 are stacked on the diffusion layer 2430. Multiple scattering dots are distributed on the upper surface of the light guide layer 2431. A groove 2435 is formed on the side of the light guide layer 2431, and an LED strip 2436 is placed within the groove 2435. Transparent silicone is filled between the lower surface of the light guide layer 2431 and the reflective layer 2432. The principle is that the light guide layer 2431 receives the incident light through the side LED strip 2436. The light transmission efficiency of the light guide layer 2431 is >85%. Under the action of the scattering dots in the light guide layer 2431, a uniform surface light source is formed. The diffuser sheet 2433 eliminates bright spots from the dots, and the prism sheet 2434 refracts large-angle light to enhance positive brightness, thereby projecting and displaying the static icons in the icon area 2422.

[0037] See Figure 7 and Figure 10The resistive sensing layer 244 includes an upper conductive layer 2440, an insulating layer 2441, and a lower conductive layer 2442. The upper conductive layer 2440 and the lower conductive layer 2442 are each provided with multiple columns of rhomboid meshes 2443, and each column of rhomboid meshes 2443 is connected together and connected to an electrode. The rhomboid meshes 2443 on the upper conductive layer 2440 and the lower conductive layer 2442 are staggered. The insulating layer 2441 is located between the two layers and is insulating. Multiple insulating points 2444 are uniformly distributed on layer 2441. When pressure is applied to the upper conductive layer 2440, deformation begins. At this time, the rhomboid grid 2443 on the upper conductive layer 2440 comes into contact with the rhomboid grid on the lower conductive layer 2442. The contact point forms a local low-resistance path, which is transmitted to the circuit board 20 through electrodes. X-coordinate measurement: The control circuit on the circuit board 20 applies a known gradient voltage (e.g., 0V on the left, 5V on the right) to a pair of opposite edges (e.g., left and right edges) of the lower conductive layer 2442. At this time, the upper conductive layer 2440 acts as a probe. The voltage value induced by the upper conductive layer 2440 at the contact point is measured. This voltage value is proportional to the position of the contact point in the X-axis direction.

[0038] Y-coordinate measurement: Switch the voltage application direction and apply a gradient voltage (e.g., 0V on top, 5V on bottom) to another pair of opposite edges (e.g., top and bottom edges) of the downward conductive layer 2442. Measure the voltage value induced at the contact point on the upper conductive layer 2440 again. This voltage value is proportional to the position of the contact point in the Y-axis direction.

[0039] Coordinate calculation: The ADC (analog-to-digital converter) inside the control circuit converts the measured analog voltage value into digital coordinate values ​​(X,Y), which enables rapid detection of the pressing position.

[0040] See Figure 7-9 Below the buffer layer 241 is the icon layer 242, which has a thickness of 0.7-1.2mm. The icon layer 242 has a two-layer structure, consisting of an optional lens layer 2420 and a substrate layer 2421 from top to bottom.

[0041] The substrate layer 2421 is a rigid transparent material with a thickness of 0.5-1.0 mm. An icon area 2422 and a non-icon area 2423 are provided on the lower surface of the substrate layer 2421. Static icons are printed in the icon area 2422 using light-shielding ink.

[0042] The optional lens layer 2420 is located on the upper surface of the substrate layer 2421 and is a microlens array film used to diffuse backlight.

[0043] The touch control process of this utility model is described in three parts:

[0044] First, the touch process: When the user touches the protective layer 240, the protective layer 240 will conduct the force to the buffer layer 241. The buffer layer 241 absorbs more than 60% of the impact force and protects the precision layer below.

[0045] Secondly, there is the optical display: the backlight layer 243 converts the light generated by the LED light strip 2436 in the groove 2435 into a surface light source through the light guide layer 2431, illuminating the static icon.

[0046] Finally, there is signal transmission: the diamond grid 2443 on the resistive sensing layer 244 can directly locate the coordinates of the touch point through the change in resistance and transmit the information to the circuit board 20.

[0047] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the scope of the technical solution of this utility model shall still fall within the protection scope of the technical solution of this utility model.

Claims

1. A cushion touchpad with static icon, installed on a control device, wherein a mounting chamber (1) is opened on the control device, and a cushion touchpad (2) is detachably installed in the mounting chamber (1), characterized in that: The buffer touch panel (2) includes a circuit board (20), and a support plate (22) is mounted on the circuit board (20) via a connecting post (21). A composite frame (23) is provided on the support plate (22). The composite frame (23) has multiple steps inside. A touch component (24) is installed inside the composite frame (23). The touch component (24) is a transparent layered structure and includes, from top to bottom, a protective layer (240), a buffer layer (241), an icon layer (242), a backlight layer (243), and a resistive sensing layer (244), which gradually decrease in size from top to bottom. The icon layer (242), the backlight layer (243), and the resistive sensing layer (244) are electrically connected to the composite frame (23), and the composite frame (23) is also electrically connected to the circuit board (20) via a lead wire (25).

2. The static icon-bearing cushion touchpad according to claim 1, wherein: The support plate (22) is also electrically connected to the circuit board (20) through multiple pins (26), and multiple spaced heat-conducting fins (27) are also provided on the lower surface of the support plate (22).

3. The static icon-bearing cushion touchpad of claim 1, wherein: The composite frame (23) is made of metal, and each step is fitted with a protective layer (240), a buffer layer (241), an icon layer (242), a backlight layer (243), and a resistance sensing layer (244) from top to bottom. The protective layer (240) is a nano-coated or coated conductive glass with a thickness of 0.3-0.5mm.

4. The static icon-bearing cushion touchpad of claim 1, wherein: The buffer layer (241) is made of silicone or a transparent elastic plate with a thickness of 0.8-1.2 mm and is located below the protective layer (240). Multiple springs (2410) are arranged along the lower edge of the buffer layer (241), and one end of each spring (2410) is in contact with the corresponding step.

5. The static icon-bearing cushion touchpad according to claim 4, wherein: The lower surface of the buffer layer (241) is also provided with a plurality of uniformly distributed silicone pillars (2411), and each silicone pillar (2411) is made of an elastic and transparent material.

6. The static icon-buffered trackpad of claim 1, wherein: The backlight layer (243) consists of a diffusion layer (2430), a light guide layer (2431), and a reflective layer (2432) from top to bottom. A diffuser sheet (2433) and a prism sheet (2434) are stacked on the diffusion layer (2430). Multiple scattering dots are distributed on the upper surface of the light guide layer (2431). A groove (2435) is also formed on the side of the light guide layer (2431). An LED light strip (2436) is set in the groove (2435). Transparent silicone is filled between the lower surface of the light guide layer (2431) and the reflective layer (2432).

7. The static icon-buffered trackpad of claim 1, wherein: The resistance sensing layer (244) includes an upper conductive layer (2440), an insulating layer (2441), and a lower conductive layer (2442). The upper conductive layer (2440) and the lower conductive layer (2442) are respectively provided with multiple columns of rhomboid grids (2443). Each column of rhomboid grids (2443) is connected together, and the rhomboid grids (2443) on the upper conductive layer (2440) and the rhomboid grids (2443) on the lower conductive layer (2442) are distributed alternately. The insulating layer (2441) is located between the two, and multiple insulating points (2444) are evenly distributed on the insulating layer (2441).

8. The static icon-bearing cushion touchpad according to claim 3, wherein: Below the buffer layer (241) is the icon layer (242), which has a thickness of 0.7-1.2mm. The icon layer (242) has a two-layer structure, consisting of an optional lens layer (2420) and a substrate layer (2421) from top to bottom.

9. The static icon-bearing cushion touchpad according to claim 8, wherein: The substrate layer (2421) is a rigid transparent material with a thickness of 0.5-1.0 mm. An icon area (2422) and a non-icon area (2423) are provided on the lower surface of the substrate layer (2421). Static icons are printed in the icon area (2422) using light-shielding ink.

10. The static icon-bearing cushion trackpad of claim 9, wherein: The optional lens layer (2420) is located on the upper surface of the substrate layer (2421) and is a microlens array film used to diffuse backlight.

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