Integrated panel and touch key structure of industrial computer

Abstract

The utility model relates to an integrated panel and touch key structure of an industrial computer, comprising a front panel which is a seamless plane structure and comprises a display screen and touch keys, the touch keys are arranged at the periphery of the display screen, the touch keys are connected with a chip of the industrial computer, and the front panel is suitable for operating the industrial computer; the touch key circuit module comprises a voltage dividing unit and a key unit; a first port of the voltage dividing unit is connected with one port of the key unit, a second port is connected with power supply voltage, a third port is grounded, and a fourth port is connected with a chip of the industrial computer and is suitable for outputting voltage to the chip; the other port of the key unit is grounded, and the key unit is an equivalent circuit of a plurality of touch keys. After the touch key is produced, the internal resistance of the touch key is measured, the key additional resistors with different resistance values are selected according to the internal resistance and the chip setting of the industrial computer, the resistance values of the touch key can be standardized through the arrangement of the key additional resistors, standardized production is completed, and convenience and rapidness are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of industrial computers, and relates to the front panel and touch buttons of industrial computers, in particular to an integrated front panel and touch button structure of an industrial computer. Background Art

[0002] Industrial computers are industrial control computers specially used in the industrial field. Their basic performance and compatibility are not much different from those of commercial computers. However, since industrial computers are usually applied to production lines and need to have functions such as dust-proof, waterproof, and anti-static, traditional industrial computers have the following problems:

[0003] 1. For the convenience of operation, several protruding buttons are usually arranged below the front panel of the industrial computer where the display screen is set to input instructions simply and quickly; this method requires a protective layer to be pasted around the display screen to protect the buttons, resulting in the non-integrated front panel of the industrial computer with gaps, and small impurities such as dust and sewage are easy to enter the edge of the protective layer, causing the protective layer to warp or even fall off, greatly reducing the service life of the buttons and the industrial computer.

[0004] 2. If flat touch buttons are installed on the front panel of the industrial computer, the touch buttons themselves conduct electricity through silver paste to realize the button function; however, silver paste itself has a certain resistance value and cannot have an extremely low resistance value like a mechanical button when closed. Moreover, the amount of silver paste used in production will affect the resistance value of the touch button, resulting in a slight difference in the resistance value of each touch button, making it impossible to produce standardized products; and the resistance values of the touch buttons are not very different, making it difficult to distinguish during input, resulting in misjudgment of operations on the industrial computer.

[0005] Therefore, we propose an integrated front panel and touch button structure of an industrial computer to solve the above problems. Summary of the Utility Model

[0006] The purpose of the utility model is to overcome the deficiencies of the prior art and provide an integrated front panel and touch button structure of an industrial computer with good sealing performance, simplicity, and accuracy.

[0007] To solve the above problems, the technical solution of the utility model is as follows:

[0008] An integrated front panel and touch button structure of an industrial computer, comprising:

[0009] A front panel, which is a seamless planar structure, includes a display screen and touch buttons. The touch buttons are located around the display screen, and the touch buttons are connected to the chip of the industrial computer and are suitable for operating the industrial computer.

[0010] A touch button circuit module, including a voltage dividing unit and a button unit.

[0011] The first port of the voltage dividing unit is connected to one port of the key unit, the second port is connected to the supply voltage, the third port is grounded, and the fourth port is connected to the chip of the industrial computer, and is adapted to output a voltage to the chip;

[0012] The other port of the key unit is grounded, and the key unit is an equivalent circuit of a plurality of touch keys.

[0013] In a further embodiment, the voltage dividing unit includes key additional resistors equal in number to the number of touch keys, and each touch key is in series with a key additional resistor;

[0014] A plurality of touch keys and the key additional resistors form a plurality of parallel branches, and the voltage divisions of the plurality of branches are all different.

[0015] In a further embodiment, each touch key is equivalent to a switch and a key internal resistance, and the switch and the key internal resistance are connected in series.

[0016] In a further embodiment, the resistance value of the key additional resistor is determined according to the key internal resistance of the corresponding touch key, and is adapted to make the plurality of branches have different voltage divisions.

[0017] In a further embodiment, the voltage dividing unit further includes a load resistor and a voltage stabilizing capacitor. The input end of the load resistor is connected to the supply voltage, the output end of the load resistor is respectively connected to the chip of the industrial computer, a plurality of key additional resistors, and the input end of the voltage stabilizing capacitor, and the output end of the voltage stabilizing capacitor is connected to the grounding port of the voltage dividing unit.

[0018] In a further embodiment, the chip of the industrial computer has a plurality of input ports for receiving voltage signals of a plurality of touch keys.

[0019] Compared with the prior art, the beneficial effects of the present utility model are:

[0020] 1. The present utility model adopts touch keys, which are flat structures without protrusions, so that the front panel is a flat and seamless integral panel, avoiding small sundries from entering the gaps during industrial production and affecting the service life of the industrial computer, ensuring the stable operation of the industrial computer and extending its service life.

[0021] 2. After the touch keys are produced in the present utility model, the internal resistance of the touch keys is measured, and according to the internal resistance and the settings of the chip of the industrial computer, key additional resistors with different resistance values are selected, so that when the touch key is pressed, a corresponding voltage division value is generated, and the voltage division value is output to the chip of the industrial computer. The chip judges the pressed touch key through different voltage division values, and then executes corresponding operation instructions; the setting of the key additional resistor can standardize the resistance value of the touch key, complete standardized production, and the circuit structure is simple, convenient and fast. Description of the Drawings

[0022] Figure 1Front view of an integrated panel and touch button structure for an industrial computer;

[0023] Figure 2 Side view of an integrated panel and touch button structure for an industrial computer;

[0024] Figure 3 One of the schematic diagrams of the touch button circuit module of an integrated panel and touch button structure for an industrial computer;

[0025] Figure 4 Two of the schematic diagrams of the touch button circuit module of an integrated panel and touch button structure for an industrial computer.

[0026] In the figure: 1, front panel; 11, display screen; 12, touch button; 2, touch button circuit module; 21, voltage dividing unit; 22, button unit; VOUT, output voltage; Vcc, supply voltage; Ru, load resistor; Cd, voltage stabilizing capacitor; Rd1 - Rd5, additional button resistors; k1 - k5, switches; Rk1 - Rk5, button internal resistances. Detailed implementation mode

[0027] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more.

[0028] Embodiment 1:

[0029] An integrated panel and touch button structure for an industrial computer, as Figures 1 to 4 shown, on the front panel 1 of the industrial computer, there are arranged a display screen 11 and several touch buttons 12. The display screen 11 and several touch buttons 12 are located on the same plane, so that the front panel 1 is a flat and seamless integrated structure. Several touch buttons 12 are located below the display screen 11 and are connected to the chip of the industrial computer, being suitable for operating the industrial computer; in this embodiment, five touch buttons 12 are arranged, and the number of touch buttons 12 can also be adjusted according to the requirements of the industrial computer.

[0030] As Figure 3 shown, the touch button circuit module 2 of several touch buttons 12 includes a voltage dividing unit 21 and a button unit 22. The button unit 22 includes two ports, one port is connected to the voltage dividing unit 21, and the other port is grounded; in addition to the port connected to the button unit 22, the voltage dividing unit 21 further includes three ports, wherein the first port is connected to the supply voltage Vcc, the second port is grounded, and the third port is connected to the chip of the industrial computer for inputting a voltage signal to the chip of the industrial computer, that is, output voltage VOUT.

[0031] As Figure 4 shown, five touch buttons 12 are arranged in parallel. The button unit 22 is the equivalent circuit of the touch button 12. The button unit 22 includes five parallel branches, and each branch is the equivalent circuit of a touch button 12, including a switch and a button internal resistance. That is, the first touch button 12 includes a series-connected switch k1 and a button internal resistance Rk1, the second touch button 12 includes a series-connected switch k2 and a button internal resistance Rk2, the third touch button 12 includes a series-connected switch k3 and a button internal resistance Rk3, the fourth touch button 12 includes a series-connected switch k4 and a button internal resistance Rk4, and the fifth touch button 12 includes a series-connected switch k5 and a button internal resistance Rk5. The output ends of the button internal resistances Rk1, Rk2, Rk3, Rk4, and Rk5 are all grounded, that is, the grounded port of the button unit 22.

[0032] The voltage division unit 21 includes five key additional resistors. The five key additional resistors are respectively connected to five switches, that is, the key additional resistor Rd1 is in series with the switch k1, the key additional resistor Rd2 is in series with the switch k2, the key additional resistor Rd3 is in series with the switch k3, the key additional resistor Rd4 is in series with the switch k4, and the key additional resistor Rd5 is in series with the switch k5. The input ends of the key additional resistor Rd1, the key additional resistor Rd2, the key additional resistor Rd3, the key additional resistor Rd4, and the key additional resistor Rd5 are respectively connected to the power supply voltage Vcc, the ground port, and the chip of the industrial computer, that is, the first port, the second port, and the third port of the voltage division unit 21. The specific resistance values of the five key additional resistors are determined according to the internal resistances of the five keys. Since each touch key 12 is affected by the amount of silver paste used during production, there are certain differences in the internal resistances of each touch key 12, that is, the resistance values of the five key internal resistances are all different, and the specific resistance values cannot be determined during production and can only be measured after production. The chip of the industrial computer has several input ports. The several input ports can arbitrarily allocate several touch keys 12, and according to the maximum voltage value of each input port, the voltage value corresponding to each touch key 12 is evenly distributed to avoid misjudging the touch key 12 with the best voltage division ratio. Taking the example of allocating three touch keys 12 to one port, if the highest voltage is 3.3V, then the set voltage levels for voltage division are 0V, 1.5V, and 3.3V. By setting different voltage division values, it is judged which touch key 12 is pressed. According to the measured internal resistance Rk1 of the key, the key additional resistor Rd1 with the corresponding resistance value is selected, so that the output voltage VOUT is 0v when the switch k1 is turned on, that is, when the first touch key 12 is pressed, the voltage division value input to the chip of the industrial computer is 0v. Therefore, the chip determines that the pressed key is the first touch key 12 and executes the corresponding operation. Similarly, according to the measured internal resistance Rk2 of the key, the key additional resistor Rd2 with the corresponding resistance value is selected, so that the output voltage VOUT is 1.5v when the switch k2 is turned on, and then the chip executes the corresponding operation. The same applies to the other touch keys 12.

[0033] The voltage division unit 21 further includes a load resistor Ru and a voltage stabilizing capacitor Cd. A load resistor Ru is connected in series between each key additional resistor and the power supply voltage Vcc to avoid short circuits. A voltage stabilizing capacitor Cd is connected in series between each key additional resistor and the ground port to keep the voltage of the entire circuit stable when the switches k1~k5 are turned on or off, and to avoid voltage mutation affecting the service life of the industrial computer.

[0034] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An integrated panel and touch key structure of an industrial computer, characterized in that: include: The front panel (1) is a seamless planar structure, comprising a display screen (11) and a plurality of touch buttons (12), wherein the plurality of touch buttons (12) are located around the display screen (11), and the plurality of touch buttons (12) are all connected to the chip of the industrial computer and are suitable for operating the industrial computer; A touch key circuit module, including a voltage divider unit and a key unit; The first port of the voltage divider unit is connected to a port of the key unit, the second port is connected to the power supply voltage, the third port is grounded, and the fourth port is connected to the chip of the industrial computer, suitable for outputting voltage to the chip; Another port of the key unit is grounded, and the key unit is an equivalent circuit of a plurality of the touch keys (12); The voltage dividing unit comprises a number of additional key resistors equal to the number of the touch keys (12), and each of the touch keys (12) is connected in series with one of the additional key resistors; A plurality of the touch keys (12) and the key additional resistors form a plurality of parallel branches, and the divided voltages of the plurality of branches are all different.

2. The integrated panel and touch key structure of an industrial computer according to claim 1, characterized in that: Each of the touch keys (12) is equivalent to a switch and a key internal resistor, and the switch and the key internal resistor are connected in series.

3. The integrated panel and touch key structure of an industrial computer according to claim 2, characterized in that: The resistance value of the additional key resistor is determined according to the corresponding key internal resistance, which is suitable for several branches to have different divided voltages.

4. The integrated panel and touch key structure of an industrial computer according to claim 3, characterized in that: The voltage divider unit also includes a load resistor and a voltage stabilizing capacitor. The input end of the load resistor is connected to the supply voltage, and the output end of the load resistor is respectively connected to the chip of the industrial computer, several key additional resistors, and the input end of the voltage stabilizing capacitor. The output end of the voltage stabilizing capacitor is connected to the ground port of the voltage divider unit.

5. The integrated panel and touch key structure of an industrial computer according to claim 4, characterized in that: The chip of the industrial computer has a plurality of input ports for receiving voltage signals from a plurality of the touch keys (12).

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