Integrated key and key circuit

Abstract

The utility model discloses an integrated key and a key circuit, and relates to the technical field of keys. The integrated button comprises a PCB substrate, a metal dome button and an LED are mounted on the PCB substrate, the metal dome button is provided with a middle hole, and the middle hole is opposite to the LED up and down; the PCB substrate is provided with a sensor circuit used for being electrically connected with the touch chip, a first contact point used for being electrically connected with the processor and a second contact point used for being grounded, the edge part of the metal dome key is electrically connected with the sensor circuit, the metal dome key is correspondingly matched with the first contact point and the second contact point respectively, and when the metal dome key is pressed, the metal dome key is connected with the processor. The metal dome key can be in contact with the first contact point and the second contact point at the same time, and when the metal dome key is loosened, the metal dome key is separated from the first contact point and the second contact point respectively. According to the integrated key, the touch key and the physical key can be integrated together, and the integrated key has light indication and light atmosphere feelings.

Description

Technical Field

[0001] The utility model relates to the technical field of buttons, in particular to an integrated button and a button circuit. Background Art

[0002] When realizing interactive functions, electronic products such as speakers need to use buttons. In the prior art, touch buttons and physical buttons are not integrated on the same module. Conventional touch buttons and physical buttons are separately arranged and need to occupy a large space to be used together; in addition, existing buttons do not have a lighting indication function and cannot create an atmosphere with lights. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide an integrated button that can integrate touch buttons and physical buttons and has a lighting indication and a lighting atmosphere for the above-mentioned deficiencies in the prior art; the utility model also provides a button circuit using the integrated button.

[0004] To solve the above first technical problem, the technical solution of the utility model is: an integrated button, including a PCB substrate, on which a dome button and an LED are mounted. The dome button is provided with a middle hole, and the middle hole is vertically opposite to the LED; the PCB substrate is provided with a sensor circuit for electrically connecting a touch chip, a first contact point for electrically connecting a processor, and a second contact point for grounding. The edge part of the dome button is electrically connected to the sensor circuit, and the dome button corresponds and cooperates with the first contact point and the second contact point respectively. When pressing the dome button, the dome button can simultaneously contact the first contact point and the second contact point. When releasing the dome button, the dome button is separated from the first contact point and the second contact point respectively.

[0005] Preferably, the PCB substrate is provided with a substrate hole. The LED is mounted on the lower side of the PCB substrate in a back-mounted manner, and the light-emitting side of the LED extends upward into the substrate hole; the dome button is mounted on the upper side of the PCB substrate, and the middle hole of the dome button is vertically opposite to the substrate hole.

[0006] Preferably, the upper side of the PCB substrate is provided with a plurality of first contact points and a plurality of second contact points, and the plurality of first contact points and the plurality of second contact points are arranged in a ring-shaped staggered interval along the outer peripheral direction of the substrate hole in a circle.

[0007] Preferably, the PCB substrate is circular, the dome button and the LED are mounted in the middle of the PCB substrate, and one end of the PCB substrate is connected with an FPC circuit board.

[0008] To solve the above second technical problem, the technical solution of the present utility model is as follows: A key circuit adopting the integrated key, characterized in that it includes a pull-up power supply, a first resistor, a second resistor, a diode, a processor and a touch chip. The pull-up power supply, the first resistor, the diode and the first contact point are connected in series in sequence. After the processor passes through the second resistor, it is electrically connected to the circuit between the first resistor and the diode. The second contact point is grounded, and the touch chip is electrically connected to the dome switch through a sensor circuit.

[0009] Preferably, the processor is provided with a KEY pin electrically connected to the second resistor. The KEY pin is set to be effective at low level and cut off at high level. The touch chip is provided with a sensor pin electrically connected to the sensor circuit.

[0010] Preferably, the diode is a Schottky diode.

[0011] The beneficial effects of the present utility model are as follows: Since the edge part of the dome switch of the present utility model is electrically connected to the sensor circuit, and the dome switch corresponds and cooperates with the first contact point and the second contact point respectively. When the dome switch is pressed, the dome switch can simultaneously contact the first contact point and the second contact point. When the dome switch is released, the dome switch is separated from the first contact point and the second contact point respectively. Therefore, the dome switch of the present utility model can itself be used as a touch key, and at the same time can correspond and cooperate with the first contact point and the second contact point to be used as a physical key, thereby integrating the touch key and the physical key together, greatly reducing the space occupied by the touch key and the physical key, and at the same time saving the key cost. Since the PCB substrate is mounted with a dome switch and an LED, and the dome switch is provided with a middle hole, and the middle hole is opposite to the LED up and down, the light emitted by the LED can be emitted from the middle hole, which can play the role of indicating the key by light. When the LED is set to RGB three-color light, it can also be used as an atmosphere light to generate a light atmosphere. The key circuit of the present utility model can realize the functions of the touch key and the physical key of the integrated key, the circuit is simple, and the practicability is strong. Description of the Drawings

[0012] Figure 1 It is a front three-dimensional structure diagram of the integrated key.

[0013] Figure 2 It is a back three-dimensional structure diagram of the integrated key.

[0014] Figure 3 It is a dispersed structure diagram of the integrated key.

[0015] Figure 4 It is a cross-sectional structure diagram of the integrated key.

[0016] Figure 5 It is a key circuit diagram. Detailed implementation mode

[0017] The structural principle and working principle of the present utility model will be further described in detail below with reference to the drawings.

[0018] As Figures 1 - 4 shown, with reference to Figure 5 , the present utility model is an integrated button, including a PCB substrate 1, on which a dome switch button S1 and an LED 3 are mounted. The dome switch button S1 is provided with a middle hole 2, and the middle hole 2 is vertically opposite to the LED 3. The PCB substrate 1 is provided with a sensor circuit for electrically connecting a touch chip U2, a first contact point 11 for electrically connecting a processor U1, and a second contact point 12 for grounding. The sensor circuit refers to Figure 5 the circuit between the touch chip U2 and the dome switch button S1; the edge part of the dome switch button S1 is electrically connected to the sensor circuit, and the dome switch button S1 is respectively correspondingly matched with the first contact point 11 and the second contact point 12. When the dome switch button S1 is pressed, the dome switch button S1 can simultaneously contact the first contact point 11 and the second contact point 12. When the dome switch button S1 is released, the dome switch button S1 is separated from the first contact point 11 and the second contact point 12 respectively. The dome switch button S1 of the present utility model can be used as a touch button itself, and at the same time can be correspondingly matched with the first contact point 11 and the second contact point 12 to be used as a physical button, so as to integrate the touch button and the physical button together, greatly reducing the space occupied by the touch button and the physical button, and at the same time saving the button cost; the light emitted by the LED 3 of the present utility model can be emitted from the middle hole 2, which can play the role of indicating the button by light. When the LED 3 is set to RGB three-color light, it can also be used as an atmosphere light to generate a light atmosphere.

[0019] As Figures 1 - 4 shown, the PCB substrate 1 is provided with a substrate hole 13, the LED 3 is mounted on the lower side of the PCB substrate 1 in a back-mounted manner, and the light-emitting side of the LED 3 extends upward into the substrate hole 13; the dome switch button S1 is mounted on the upper side of the PCB substrate 1, and the middle hole 2 of the dome switch button S1 is vertically opposite to the substrate hole 13. Installing the LED 3 into the substrate hole 13 can prevent the light from diffusing around, and can also prevent the dome switch button S1 from being pressed by the child.

[0020] As Figure 3As shown, a plurality of first contact points 11 and a plurality of second contact points 12 are provided on the upper side of the PCB substrate 1. The plurality of first contact points 11 and the plurality of second contact points 12 are arranged in a ring-shaped staggered and spaced manner along the outer peripheral direction of the substrate hole 13. After arranging the first contact points 11 and the second contact points 12 in a ring-shaped staggered and spaced manner, when the dome switch button S1 is pressed at any angle, it can contact the corresponding first contact points 11 and second contact points 12, thus ensuring the contact stability.

[0021] As Figures 1 - 3 shown, the PCB substrate 1 is circular, the dome switch button S1 and the LED 3 are mounted in the middle of the PCB substrate 1, and one end of the PCB substrate 1 is connected to an FPC circuit board 14.

[0022] As Figure 5 shown, with reference to Figures 1 - 4 , a key circuit using the integrated key includes a pull-up power supply V+, a first resistor R1, a second resistor R2, a diode D2, a processor U1, and a touch chip U2. The pull-up power supply V+, the first resistor R1, the diode D2, and the first contact point 11 are connected in series in sequence. After the processor U1 passes through the second resistor R2, it is electrically connected to the circuit between the first resistor R1 and the diode D2. The second contact point 12 is grounded, and the touch chip U2 is electrically connected to the dome switch button S1 through a sensor line. The key circuit of the present invention can realize the touch key and physical key functions of the integrated key, with a simple circuit and strong practicability.

[0023] As Figure 5 shown, the processor U1 is provided with a KEY pin electrically connected to the second resistor R2. The KEY pin is set to be effective at low level and cut off at high level. The touch chip U2 is provided with a sensor pin electrically connected to the sensor line. The diode D2 is a Schottky diode D2.

[0024] The working principle of the present invention is as follows:

[0025] 1. The dome switch button S1 is connected to the sensor pin of the touch chip. When it is not pressed to short-circuit the lower feed point, the dome switch button S1 can be used as an independent touch key.

[0026] 2. Figure 5 In , V+ is a stable pull-up power input point, the first resistor R1 is an input current-limiting resistor. When the dome switch button S1 is not pressed to short-circuit the feed point, the negative pole of the Schottky diode D2 is floating, and the KEY point is at high level; when the dome switch button S1 is pressed to short-circuit the feed point, the negative pole of the Schottky diode D2 is short-circuited to the ground, the voltage passing through the first resistor R1 is pulled down, the second resistor R2 is conducted to GND, and the KEY point is at low level.

[0027] 3. Figure 5 The functional pin KEY of the KEY point connection processor U1 in [] is connected. The pin KEY of the processor U1 is set to be valid at low level and cut off at high level. By using the dome switch button S1 to press to short-circuit the feed point or not, the button function is correspondingly turned on or off.

[0028] The above is only a preferred embodiment of the present invention. Any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical solutions of the present invention are all within the scope of the technical solutions of the present invention.

Claims

1. An integrated button, characterized in that: It includes a PCB substrate, on which a dome switch button and an LED are mounted. The dome switch button is provided with a central hole, and the central hole is vertically opposite to the LED. The PCB substrate is provided with a sensor circuit for electrically connecting a touch chip, a first contact point for electrically connecting a processor, and a second contact point for grounding. The edge part of the dome switch button is electrically connected to the sensor circuit, and the dome switch button corresponds and cooperates with the first contact point and the second contact point respectively. When the dome switch button is pressed, the dome switch button can simultaneously contact the first contact point and the second contact point. When the dome switch button is released, the dome switch button is separated from the first contact point and the second contact point respectively.

2. The integrated button according to claim 1, wherein: The PCB substrate is provided with a substrate hole. The LED is mounted on the lower side of the PCB substrate in a back-to-back manner, and the light-emitting side of the LED extends upward into the substrate hole. The dome switch button is mounted on the upper side of the PCB substrate, and the central hole of the dome switch button is vertically opposite to the substrate hole.

3. The integrated button according to claim 2, wherein: On the upper side of the PCB substrate, there are a plurality of first contact points and a plurality of second contact points, and the plurality of first contact points and the plurality of second contact points are arranged in a ring-shaped staggered and spaced manner along the outer peripheral direction of the substrate hole in a circle.

4. The integrated button according to claim 1, wherein: The PCB substrate is circular, the dome switch button and the LED are mounted in the middle of the PCB substrate, and one end of the PCB substrate is connected to an FPC circuit board.

5. A key circuit using the integrated key according to any one of claims 1-4, characterized in that: It includes a pull-up power supply, a first resistor, a second resistor, a diode, a processor, and a touch chip. The pull-up power supply, the first resistor, the diode, and the first contact point are connected in series in sequence. After the processor passes through the second resistor, it is electrically connected to the circuit between the first resistor and the diode. The second contact point is grounded, and the touch chip is electrically connected to the dome switch button through the sensor circuit.

6. The key circuit according to claim 5, characterized in that: The processor is provided with a KEY pin electrically connected to the second resistor, and the KEY pin is set to be effective at low level and cut off at high level.

7. The key circuit according to claim 5, wherein: The touch chip is provided with a sensor pin electrically connected to the sensor circuit.

8. The key circuit according to claim 5, wherein: The diode is a Schottky diode.

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