Hidden high-sensitivity capacitance key for teaching model acupoint positioning

Abstract

The utility model provides a hidden high-sensitivity capacitance key for teaching model acupoint positioning, which comprises a double-sided printed circuit board comprising a first board and a second board which are oppositely arranged, the first board is at least provided with an induction coil, an induction spring and an indicator light, and the second board is at least provided with an induction coil; the second board surface is at least provided with an integrated circuit, a sensitivity regulation and control circuit, an indicating lamp driving circuit and a power supply control circuit. Through the design that the induction coil is matched with the induction spring, the induction sensitivity of the capacitance key to the touch operation of a user outside the model is effectively improved; meanwhile, the capacitance keys are realized by adopting a double-sided printed circuit board design, so that the occupied space is effectively reduced on the basis of not influencing the complete function and the sensitivity of the capacitance keys, and a plurality of capacitance keys can be conveniently arranged in a narrow model; in addition, in combination with the design of the indicating lamp, more intuitive and clearer feedback is performed on the touch operation of the user at the correct position, and the use effect of the teaching model is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of teaching model design, and in particular to a hidden high-sensitivity capacitive button for acupoint positioning of a teaching model and a teaching model. Background Art

[0002] A button is a human-machine interface used by users to control instruments and equipment. Currently, commonly used buttons are mainly divided into mechanical buttons and capacitive buttons. In teaching models used for learning acupoint locations, if mechanical buttons are used, holes must be punched into the model's exterior during installation, which not only affects the model's appearance but also makes its surface structure incompatible with the overall appearance of the device. Capacitive buttons, when installed inside the model, have a significantly reduced sensitivity due to the model's own material and thickness limitations. This makes existing buttons unsuitable for installation and use in small teaching models or in confined spaces, or where the appearance of the product must not be affected. Summary of the Invention

[0003] The purpose of the embodiments of the present disclosure is to provide a hidden high-sensitivity capacitive button and a teaching model for acupoint positioning of a teaching model, so as to solve the problem that the buttons in the prior art cannot meet the requirements of installation and use in some small-volume teaching models or their narrow space parts or under the premise of not affecting the appearance of the product.

[0004] The embodiment of the present disclosure adopts the following technical solution: a hidden high-sensitivity capacitive button for acupoint positioning of a teaching model, comprising: a double-sided printed circuit board, the double-sided printed circuit board comprising a first board surface and a second board surface arranged opposite to each other, wherein the first board surface is provided with at least an induction coil, an induction spring and an indicator light, and the second board surface is provided with at least an integrated circuit, a sensitivity control circuit, an indicator light drive circuit and a power supply control circuit; the induction coil comprises at least an annular induction area located on the first board surface and a connection area located on the second board surface, the induction spring extends along the normal direction of the first board surface, and the first end of the induction spring is located at the annular induction area. The teaching model is a teaching model of a teaching model of a teaching model. ...

[0005] In some embodiments, the sensitivity control circuit includes at least a first capacitor, a second capacitor and a ninth resistor; wherein, the first pole of the first capacitor is grounded, the second pole of the first capacitor is connected to the sixth pin of the integrated circuit, the first pole of the second capacitor is grounded, the second pole of the second capacitor is connected to the fifth pin of the integrated circuit, and the ninth resistor is connected in series between the second pole of the second capacitor and the power supply.

[0006] In some embodiments, the indicator light includes a first indicator light and a second indicator light, and the indicator light driving circuit includes at least: an eleventh resistor, a thirteenth resistor, a fifteenth resistor, an eighteenth resistor and a switch tube; wherein, the first end of the eleventh resistor is connected to the power supply, the second end of the eleventh resistor is connected to the first end of the first indicator light, the second end of the first indicator light is connected to the first end of the switch tube, the first end of the thirteenth resistor is connected to the power supply, the second end of the thirteenth resistor is connected to the first end of the second indicator light, the second end of the second indicator light is connected to the first end of the switch tube, the second electrode of the switch tube is grounded, the first end of the fifteenth resistor is connected to the connection point X, the second end of the fifteenth resistor is connected to the control electrode of the switch tube, the first end of the eighteenth resistor is connected to the connection point X, the second end of the eighteenth resistor is connected to the second electrode of the switch tube, and the connection point leads to the control end of the indicator light driving circuit.

[0007] In some embodiments, the switch tube is an NPN transistor or an N-type MOSFET.

[0008] In some embodiments, a third capacitor is further included, wherein a first electrode of the third capacitor is grounded, and a second electrode of the third capacitor is connected to the connection area and the welding point.

[0009] In some embodiments, an eighth resistor is further included, wherein the eighth resistor is connected in series between the connection area, the solder joint, and the third pin of the integrated circuit.

[0010] In some embodiments, the power supply control circuit includes at least: a fifth resistor and a power supply, wherein the fifth resistor is connected in series between the power supply and the first pin of the integrated circuit.

[0011] In some embodiments, a first fixing hole and a second fixing hole are respectively formed at one of the diagonal groups of the double-sided printed circuit board.

[0012] An embodiment of the present disclosure also provides a teaching model, comprising at least one hidden high-sensitivity capacitive button as described above, wherein the hidden high-sensitivity capacitive button is placed inside the teaching model, and the circular spring end surface of the sensing spring of the hidden high-sensitivity capacitive button is in contact with the interior of the teaching model corresponding to the acupoint position.

[0013] The beneficial effects of the disclosed embodiment are as follows: through the design of the induction coil and the induction spring, the sensitivity of the capacitive button to the user's touch operation outside the model is effectively improved, so that the capacitive button can also achieve sensitive touch feedback on the basis of separating the external materials of the teaching model; at the same time, the capacitive button of this embodiment is implemented by a double-sided printed circuit board design, which can effectively reduce the occupied space without affecting the complete function and sensitivity of the capacitive button, and facilitate the setting of multiple capacitive buttons inside a small model; in addition, combined with the design of the indicator light, the user's touch operation in the correct position can be given more intuitive and clear feedback, thereby improving the use effect of the teaching model. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate one or more embodiments of this specification or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 This is a schematic diagram of the arrangement of the first panel of the capacitive button in the first embodiment of the present disclosure;

[0016] Figure 2 This is a schematic diagram of the arrangement of the second panel of the capacitive button in the first embodiment of the present disclosure;

[0017] Figure 3 Schematic diagram of the circuit structure of related circuits and devices connected to the integrated circuit in the first embodiment of the present disclosure;

[0018] Figure 4 Schematic diagram of the circuit structure of the indicator light driving circuit in the first embodiment of the present disclosure;

[0019] Figure 5 Schematic diagram of the combination of a hidden high-sensitivity capacitive button and a teaching model in the second embodiment of the present disclosure. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solutions in one or more embodiments of this specification, the technical solutions in one or more embodiments of this specification will be clearly and completely described below in conjunction with the drawings in one or more embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on one or more embodiments of this specification, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this document.

[0021] A button is a human-machine interface used by users to control instruments and equipment. Currently, commonly used buttons are mainly divided into mechanical buttons and capacitive buttons. In teaching models used for learning acupoint locations, if mechanical buttons are used, holes must be punched into the model's exterior during installation, which not only affects the model's appearance but also makes its surface structure incompatible with the overall appearance of the device. Capacitive buttons, when installed inside the model, have a significantly reduced sensitivity due to the model's own material and thickness limitations. This makes existing buttons unsuitable for installation and use in small teaching models or in confined spaces, or where the appearance of the product must not be affected.

[0022] In order to solve the above problems, the first embodiment of the present disclosure provides a hidden high-sensitivity capacitive button (hereinafter referred to as capacitive button) for acupoint positioning of the teaching model. The capacitive button is mainly placed inside the teaching model and is set corresponding to different acupoint positions. Figures 1 to 4 The specific structure and implementation of the capacitive button in this embodiment are described in detail.

[0023] The capacitive button in this embodiment includes at least a double-sided printed circuit board (PCB), which includes at least a first board surface and a second board surface arranged opposite to each other. Electronic components can be arranged on both of the above-mentioned board surfaces and can be connected through metal circuits printed on the board surfaces. Figure 1 and Figure 2 A schematic diagram of the device configuration of the first and second surfaces of the capacitive button in this embodiment is shown, wherein at least an induction coil, an induction spring, and an indicator light are provided on the first surface, and at least an integrated circuit, a sensitivity control circuit, an indicator light drive circuit, and a power supply control circuit are provided on the second surface.

[0024] Specifically, if Figure 1As shown, the induction coil mainly includes an annular induction area arranged on the first board surface, and also includes a connection area for connecting the induction coil with other electronic components. The connection area is located on the second board surface and is connected to the annular induction area through a through hole; the induction spring extends along the normal direction of the first board surface, and its first end is located in the inner circle area of ​​the annular induction area, and passes through the preset through hole of the circuit board to form a solder joint on the second board surface, which is convenient for connecting with other devices through the solder joint and the printed circuit connected to the solder joint. The second end of the induction spring is formed by a metal wire wrapped inward along the outer circle to form a circular spring end face. The circular spring end face is set corresponding to the acupoint position on the inner side of the teaching model. It is preferably fitted with the inner surface of the model to facilitate sensing the magnetic field when the human body touches it; at the same time, an indicator light is also provided in the inner circle area of ​​the annular induction area. Figure 1 The system includes two indicator lights, namely the first indicator light and the second indicator light. The two indicator lights can be set in parallel, so that when one indicator light fails, the other indicator light can be lit to remind the user of the correct position of the acupoints. They can also be lit at the same time when both indicator lights are working normally to enhance the observation effect of the indicator light status from outside the model.

[0025] refer to Figure 2 , the second board is mainly used for setting control-related components, and its core component is the integrated circuit U1, which includes a total of six pins, each used to connect different circuits or components, so as to achieve the purpose of the capacitive button sensing the user's touch and forming visual feedback. Specifically, the first pin 1 of the integrated circuit U1 is connected to the power supply control circuit, the second pin 2 of the integrated circuit U1 is grounded, the third pin 3 of the integrated circuit U1 is connected to the connection area and the solder joint, and is used to receive the induced current generated by the induction coil and the induction spring, the fourth pin 4 of the integrated circuit U1 is connected to the control end of the indicator light drive circuit, and is used to send an instruction to the indicator light drive circuit to light up the indicator light when the induced current is received, and the fifth pin 5 and the sixth pin 6 of the integrated circuit are connected to the sensitivity control circuit to adjust the induction sensitivity of the capacitive button. The following will be combined with Figure 3 and Figure 4 The connection relationship between the above circuits and devices and the functions implemented are explained.

[0026] Figure 3The figure mainly shows a circuit structure diagram of the relevant circuits and devices connected to the integrated circuit in this embodiment. Specifically, the sensitivity control circuit mainly includes a first capacitor C1, a second capacitor C2 and a ninth resistor R9. The first electrode of the first capacitor C1 is grounded, the second electrode of the first capacitor C1 is connected to the sixth pin 6 of the integrated circuit U1, the first electrode of the second capacitor C2 is grounded, the second electrode of the second capacitor C2 is connected to the fifth pin 5 of the integrated circuit U1, and the ninth resistor R9 is connected in series between the second electrode of the second capacitor C2 and the power supply VDD. For the capacitive button of this embodiment, the integrated circuit U1 will only determine that the current touch operation is valid when the received induced current exceeds a certain threshold, and the indicator light will be lit accordingly. The first capacitor C1 and the second capacitor C2 are used as capacitors for adjusting the sensitivity. The threshold can be adjusted by adjusting the capacitance of the first capacitor C1 and the second capacitor C2, thereby achieving sensitivity control. It should be noted that the capacitance adjustment of the first capacitor C1 and the second capacitor C2 described in this embodiment refers to replacing capacitor devices with different capacitance values ​​at the corresponding positions. The capacitance value of the capacitor device can be adjusted according to the use environment of the teaching model, the manufacturing material of the model, the material thickness, etc., and the above adjustment needs to be performed before the capacitive button is produced.

[0027] Figure 4 The circuit structure diagram of the indicator light driving circuit in this embodiment is shown. Specifically, in combination with the dual indicator light design used in this embodiment (i.e., the first indicator light LED1 and the second indicator light LED2), the indicator light driving circuit at least includes: an eleventh resistor R11, a thirteenth resistor R13, a fifteenth resistor R15, an eighteenth resistor R18, and a switch tube Q1, wherein the first end of the eleventh resistor R11 is connected to the power supply, the second end of the eleventh resistor R11 is connected to the first end of the first indicator light LED1, the second end of the first indicator light LED1 is connected to the first end of the switch tube Q1, and the first end of the thirteenth resistor R13 is connected to the power supply VDD. A second end of a thirteenth resistor R13 is connected to a first end of a second indicator light LED2, a second end of the second indicator light LED2 is connected to a first end of a switch tube Q1, a second terminal of the switch tube Q1 is grounded, a first end of a fifteenth resistor R15 is connected to a connection point X, a second end of the fifteenth resistor R15 is connected to a control terminal of the switch tube Q1, a first end of an eighteenth resistor R18 is connected to a connection point X, a second end of the eighteenth resistor R18 is connected to a second terminal of the switch tube Q1, and a control terminal IC of the indicator light drive circuit is connected to a fourth pin 4 of the integrated circuit U1.

[0028] In some embodiments, the first indicator LED1 and the second indicator LED2 are both implemented by light emitting diodes, and the first ends of the two correspond to the positive poles of the light emitting diodes, and the second ends correspond to the negative poles of the light emitting diodes. The switch tube Q1 can be implemented by an NPN transistor or an N-type MOSFET. In the case where the switch tube Q1 is an NPN transistor, Figure 4 As shown, the first end of the switch Q1 is the collector of the transistor, the second end of the switch Q1 is the emitter of the transistor, and the control electrode of the switch Q1 is the base of the transistor. If the switch Q1 is implemented as an N-type MOSFET, the first end of the switch Q1 corresponds to the drain of the MOSFET, the second end of the switch Q1 corresponds to the source of the MOSFET, and the control electrode of the switch Q1 corresponds to the gate of the MOSFET. When the integrated circuit U1 inputs a drive command to the control terminal IC through the fourth pin 4, the switch Q1 switches its own on-off state based on the level of the drive command, thereby achieving on-off adjustment of the path where the control indicator light is located.

[0029] Further, in Figure 3 In the example, the third pin 3 of the integrated circuit U1 is connected to two connection terminals TP1 and TP3. These two connection terminals correspond to the connection area of ​​the induction coil and the solder joint of the induction spring, respectively. That is, after sensing the weak magnetic field of the human body, the induction coil and the induction spring generate an induced current, which is output to the integrated circuit U1 through the third pin 3. It should be noted that an eighth resistor R8 is connected in series between the connection terminals TP1 and TP3 and the third pin 3 of the integrated circuit U1 to filter noise. In addition, a third capacitor C3 is connected between the connection terminals TP1 and TP3 and the ground terminal. The first terminal of the third capacitor C3 is grounded, and the second terminal is connected to the connection area and solder joint to smooth the power supply voltage and filter power supply noise.

[0030] Furthermore, if Figure 3 As shown, the power supply control circuit connected to the first pin 1 of the integrated circuit U1 mainly includes a fifth resistor R5 and a power supply VDD, wherein the fifth resistor R5 is connected in series between the power supply VDD and the first pin 1 of the integrated circuit U1 to achieve current limiting protection of the integrated circuit. The power supply VDD used in this embodiment is +3.3V, which is used not only to power the integrated circuit U1 but also to power the indicator light.

[0031] At the same time, if Figure 3As shown, the first pin 1 of integrated circuit U1 is also connected to a connection terminal K03, which is connected to an external main control board to enable communication between integrated circuit U1 and the external main control board. During actual operation of the capacitive keypad, integrated circuit U1 and other components within the capacitive keypad are powered by the external main control board. The external main control board also collects the induced current received by integrated circuit U1 through connection terminal K03. When a user touches the correct acupoint location from outside the model, the induction coil and induction spring sense the human body's weak magnetic field, generating an induced current that is transmitted to integrated circuit U1. When integrated circuit U1 determines that the induced current exceeds a threshold, it determines that the touch is valid. At this time, the external main control board, based on the integrated circuit's determination and by reading the on / off state of the indicator light, issues a command to integrated circuit U1 to illuminate or deactivate the indicator light. Based on this command, integrated circuit U1 outputs the level value for illuminating or deactivating the indicator light to the control terminal of the indicator light drive circuit, thereby providing visual feedback of the touch operation through the adjustment of the indicator light illumination.

[0032] In some embodiments, the external main control board can also proactively send instructions to the integrated circuit to illuminate or deactivate indicator lights based on actual teaching needs, even when the user is not touching the acupoint locations. For example, during initial teaching, the indicator lights corresponding to all or some acupoint locations can be illuminated to provide the user with an intuitive understanding of the correct acupoint locations. In some embodiments, an integrated circuit with more functionality can also be used to autonomously determine the status of the indicator lights, or by recording the indicator light status after each effective touch, autonomously switching the lighting status of the indicator lights without the need for control from the external main control board.

[0033] Further references Figure 1 and Figure 2 The double-sided printed circuit board shown in the figure has a first fixing hole and a second fixing hole respectively provided on one set of opposite corners of the double-sided printed circuit board. The above two fixing holes penetrate the double-sided printed circuit board, making it convenient to use plastic or metal studs to more firmly fix the capacitive button to the corresponding acupoint position inside the teaching model.

[0034] This embodiment effectively improves the sensitivity of the capacitive buttons to user touch operations outside the model through the design of an induction coil and an induction spring, so that the capacitive buttons can also achieve sensitive touch feedback on the basis of separating the external materials of the teaching model; at the same time, the capacitive buttons of this embodiment are implemented using a double-sided printed circuit board design, which can effectively reduce the occupied space without affecting the complete function and sensitivity of the capacitive buttons, making it easier to set up multiple capacitive buttons inside a small model; in addition, combined with the design of the indicator light, more intuitive and clear feedback can be provided to the user's touch operation in the correct position, thereby improving the use effect of the teaching model.

[0035] The second embodiment of the present disclosure provides a teaching model, which is a hollow model and includes at least one hidden high-sensitivity capacitive button as described in the first embodiment of the present disclosure. The hidden high-sensitivity capacitive button is placed inside the teaching model, and the circular spring end surface of the sensing spring of the hidden high-sensitivity capacitive button is fitted with the inside of the teaching model corresponding to the acupoint position to realize the sensing of the user's touch operation on the outside of the model.

[0036] Figure 5 This is a schematic diagram of the combination of the hidden high-sensitivity capacitive button and the teaching model in this embodiment, wherein the teaching model is a teaching model dog with a shell made of photosensitive resin and a thickness of 5mm. By touching the correct acupoint position from the outside of the model, the capacitive button hidden inside the model responds with high sensitivity. Touching the button once sends a signal, and the external main control board collects its signal, lights up the LED indicator, and displays the exact position of the acupoint. At the same time, the external main control board can also drive the dog to bark and the configuration screen to display acupoint location and other information; touching the button a second time sends a signal, and the external main control board collects its signal to turn off the LED indicator. At the same time, the main control board drives the configuration screen to turn off acupoint location and other information; by clicking the acupoint button on the configuration screen, the main control board can also directly control the lighting and extinguishing of the capacitive button LED indicator, thereby achieving a clearer, more intuitive, and human-computer interactive teaching purpose.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A hidden high-sensitivity capacitive button for acupoint positioning in a teaching model, characterized in that: include: A double-sided printed circuit board, the double-sided printed circuit board comprising a first board surface and a second board surface arranged opposite to each other, wherein the first board surface is provided with at least an induction coil, an induction spring and an indicator light, and the second board surface is provided with at least an integrated circuit, a sensitivity control circuit, an indicator light driving circuit and a power supply control circuit; The induction coil at least includes an annular induction area located on the first board surface and a connection area located on the second board surface, the induction spring extends along the normal direction of the first board surface, the first end of the induction spring is located in the inner circle area of ​​the annular induction area, and passes through a preset through hole of the circuit board to form a solder joint on the second board surface, the second end of the induction spring is formed by a metal wire surrounding inward along the outer circle to form a circular spring end surface, the circular spring end surface is set corresponding to the acupoint position inside the teaching model, and the indicator light is placed in the inner circle area of ​​the annular induction area; The first pin of the integrated circuit is connected to the power supply control circuit, the second pin of the integrated circuit is grounded, the third pin of the integrated circuit is connected to the connection area and the solder joint, the fourth pin of the integrated circuit is connected to the control end of the indicator light driving circuit, and the fifth pin and the sixth pin of the integrated circuit are connected to the sensitivity control circuit.

2. The hidden high-sensitivity capacitive button according to claim 1, characterized in that: The sensitivity control circuit at least includes a first capacitor, a second capacitor and a ninth resistor; wherein, The first electrode of the first capacitor is grounded, the second electrode of the first capacitor is connected to the sixth pin of the integrated circuit, the first electrode of the second capacitor is grounded, the second electrode of the second capacitor is connected to the fifth pin of the integrated circuit, and the ninth resistor is connected in series between the second electrode of the second capacitor and the power supply.

3. The hidden high-sensitivity capacitive key according to claim 1, characterized in that: The indicator light includes a first indicator light and a second indicator light, and the indicator light driving circuit includes at least: an eleventh resistor, a thirteenth resistor, a fifteenth resistor, an eighteenth resistor and a switch tube; wherein, The first end of the eleventh resistor is connected to the power supply, the second end of the eleventh resistor is connected to the first end of the first indicator light, the second end of the first indicator light is connected to the first end of the switch tube, the first end of the thirteenth resistor is connected to the power supply, the second end of the thirteenth resistor is connected to the first end of the second indicator light, the second end of the second indicator light is connected to the first end of the switch tube, the second pole of the switch tube is grounded, the first end of the fifteenth resistor is connected to the connection point X, the second end of the fifteenth resistor is connected to the control pole of the switch tube, the first end of the eighteenth resistor is connected to the connection point X, the second end of the eighteenth resistor is connected to the second pole of the switch tube, and the connection point leads to the control end of the indicator light driving circuit.

4. The hidden high-sensitivity capacitive key according to claim 3, characterized in that: The switch tube is an NPN-type triode or an N-type MOS tube.

5. The hidden high-sensitivity capacitive key according to claim 1, characterized in that: A third capacitor is also included, wherein a first electrode of the third capacitor is grounded, and a second electrode of the third capacitor is connected to the connection area and the welding point.

6. The hidden high-sensitivity capacitive key according to claim 1, characterized in that: An eighth resistor is also included, and the eighth resistor is connected in series between the connection area, the solder joint, and the third pin of the integrated circuit.

7. The hidden high-sensitivity capacitive key according to claim 1, characterized in that: The power supply control circuit at least includes: a fifth resistor and a power supply, wherein the fifth resistor is connected in series between the power supply and the first pin of the integrated circuit.

8. The hidden high-sensitivity capacitive key according to any one of claims 1 to 7, characterized in that: One set of diagonal portions of the double-sided printed circuit board is respectively provided with a first fixing hole and a second fixing hole.

9. A teaching model, characterized in that: It comprises at least one hidden high-sensitivity capacitive button as described in any one of claims 1 to 8, wherein the hidden high-sensitivity capacitive button is placed inside the teaching model, and the circular spring end surface of the sensing spring of the hidden high-sensitivity capacitive button fits with the inside of the teaching model corresponding to the acupoint position.

10. The teaching model according to claim 9, characterized in that: The teaching model has a shell made of photosensitive resin material.

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