CN218273151U

CN218273151U - Circuit board, circuit board module and handrail device

Info

Publication number: CN218273151U
Application number: CN202222882983.9U
Authority: CN
Inventors: 蒋畅
Original assignee: Foshan Youbu Medical Instrument Co ltd
Current assignee: Foshan Youbu Medical Instrument Co ltd
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-01-10
Anticipated expiration: 2032-10-31

Abstract

A circuit board, a circuit board module and a handrail device are provided, wherein the circuit board comprises a microcontroller circuit, a key switch, a lighting circuit, an alarm circuit, a charging circuit and a battery interface; the key switch, the lighting circuit and the alarm circuit are all electrically connected with the microcontroller circuit, the battery interface is used for being electrically connected with a rechargeable battery, the lighting circuit and the alarm circuit are all electrically connected with the battery interface, and the rechargeable circuit is electrically connected with the battery interface; lighting circuit includes the LED lamp, warning circuit includes bee calling organ, works as when the time length that key switch was pressed is more than or equal to first predetermined time length, microcontroller circuit control LED lamp is lighted and control bee calling organ sends the chimes of doom, works as the time length that key switch was pressed is less than first predetermined time length, microcontroller circuit control LED lights, can satisfy handrail device's night illumination function and alarming function from this.

Description

Circuit board, circuit board module and handrail device

Technical Field

The utility model relates to an electronic circuit technical field especially relates to a circuit board, circuit board module and handrail device.

Background

Handrails are used in many occasions in daily life, such as bedside handrails, toilet seat handrail frames, old people furniture handles and the like, and particularly in public places such as families, hospitals and the like, handrails are arranged around corridors, bedsides and toilets so as to facilitate patients to get up or walk, however, the existing handrails only have the supporting function and are single in function, and cannot meet the requirements of night use and emergency alarm.

Disclosure of Invention

An object of the utility model is to the weak point among the prior art, provide a circuit board, circuit board module and handrail device, can satisfy handrail device's night lighting function and alarming function, improve the convenience that handrail device used.

To achieve the above object, in a first aspect, the present invention provides a circuit board, which includes a microcontroller circuit, a key switch, a lighting circuit, an alarm circuit, a charging circuit, and a battery interface;

the key switch, the lighting circuit and the alarm circuit are all electrically connected with the microcontroller circuit, the battery interface is used for being electrically connected with a rechargeable battery, the lighting circuit and the alarm circuit are both electrically connected with the battery interface so as to be electrically connected with the rechargeable battery through the battery interface, and the charging circuit is electrically connected with the battery interface and used for charging the rechargeable battery;

the lighting circuit comprises an LED lamp, the alarm circuit comprises a buzzer, when the pressed time of the key switch is longer than or equal to a first preset time, the microcontroller circuit controls the LED lamp to light and controls the buzzer to give out an alarm, and when the pressed time of the key switch is shorter than the first preset time, the microcontroller circuit controls the LED to light;

under the condition that the LED lamp lights and the buzzer gives an alarm sound, the buzzer stops giving the alarm sound when the key switch is pressed, and the LED lamp is turned off when the key switch is pressed again.

And when the LED lamp is on for more than a second preset time, the microcontroller circuit controls the LED lamp to be off.

The microcontroller circuit comprises a programming interface, a first chip, a first resistor and a first capacitor;

the first chip comprises a VCC pin, a GND pin, a PA0 pin, a PA1 pin, a PA2 pin, a PA3 pin, a PA4 pin and a PA5 pin, the programming interface comprises a first pin to a fourth pin, a first end of a first resistor is electrically connected with a VCC voltage source, a second end of the first resistor is electrically connected with a first end of a first capacitor, a first end of a key switch and the PA1 pin of the first chip, a second end of the first capacitor and a second end of the key switch are both grounded, the VCC pin of the first chip is electrically connected with the VCC voltage source, the GND pin of the first chip is grounded, the PA0 pin of the first chip is suspended, and the PA4 pin and the PA5 pin of the first chip are respectively electrically connected with the alarm circuit and the lighting circuit; the first pin of the programming interface is electrically connected with the VCC voltage source, the second pin and the third pin of the programming interface are respectively electrically connected with the PA2 pin and the PA3 pin of the first chip, and the fourth pin of the programming interface is grounded.

The lighting circuit further comprises a second chip, a first MOS (metal oxide semiconductor) tube, a second resistor and a third resistor;

the second chip includes VDD pin, GND pin and LED pin, the first end of second resistance with the PA5 pin electric connection of first chip, the second end of second resistance with the first end of third resistance the grid electric connection of first MOS pipe, the second end of third resistance with the source electrode of first MOS pipe all grounds, the drain electrode of first MOS pipe with the GND pin of second chip, the negative pole electric connection of LED lamp, the LED pin of second chip with the positive pole electric connection of LED lamp, the VDD pin of second chip with the positive pole electric connection of battery interface.

The alarm circuit further comprises a fourth resistor, a fifth resistor, a second MOS (metal oxide semiconductor) tube and a first diode;

the first end of the fourth resistor is electrically connected with the PA4 pin of the first chip, the second end of the fourth resistor is electrically connected with the first end of the fifth resistor and the grid electrode of the second MOS tube, the second end of the fifth resistor is electrically connected with the source electrode of the second MOS tube, the drain electrode of the second MOS tube is electrically connected with the anode of the first diode and the cathode of the buzzer, and the cathode of the first diode and the cathode of the buzzer are electrically connected to the anode of the battery interface.

The charging circuit comprises a charging interface, a third chip, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor and a second capacitor;

the third chip comprises a TEMP pin, a PROG pin, a GND pin, a VCC pin, a CE pin and a BAT pin; the TEMP pin and the GND pin of the third chip are both grounded, the PROG pin of the third chip is electrically connected with the first end of the sixth resistor, the VCC pin and the CE pin of the third chip and the first end of the second capacitor are both electrically connected with a VBUS voltage source, the second end of the sixth resistor and the second end of the second capacitor are both grounded, and the BAT pin of the third chip is electrically connected to the positive electrode of the battery interface;

the charging interface comprises first to sixth pins, the first pin and the sixth pin of the charging interface are both grounded, the second pin and the fifth pin of the charging interface are both electrically connected with the first end of the seventh resistor, the second end of the seventh resistor is electrically connected with the VBUS voltage source, the third pin of the charging interface is electrically connected with the first end of the eighth resistor, the fourth pin of the charging interface is electrically connected with the first end of the ninth resistor, and the second end of the eighth resistor and the second end of the ninth resistor are both grounded.

The power supply filter circuit comprises a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, a tenth resistor and a second diode;

the first end of the third capacitor, the first end of the fourth capacitor and the first end of the tenth resistor are electrically connected to the anode of the battery interface, the first end of the fifth capacitor, the first end of the sixth capacitor, the first end of the seventh capacitor and the cathode of the second diode are electrically connected to the VCC voltage source, and the second end of the third capacitor, the second end of the fourth capacitor, the second end of the fifth capacitor, the second end of the sixth capacitor, the second end of the seventh capacitor and the anode of the second diode are all grounded.

In a second aspect, the present invention provides a circuit board module, which includes a circuit board and a rechargeable battery, wherein the circuit board provides power, and the circuit board is any one of the above-mentioned circuit boards.

A third aspect of the present invention provides a handrail device, comprising a device body with a handrail and a circuit board module as described above, wherein the circuit board module is mounted on the handrail of the device body.

The circuit board module is arranged in the hollow cavity of the handrail, and the handrail is provided with a key through hole, an illumination through hole and an alarm through hole; the key switch in the circuit board of the circuit board module corresponds to the key through hole, the LED lamp of the circuit board corresponds to the lighting through hole, and the buzzer of the circuit board corresponds to the alarm through hole.

The armrest comprises a supporting surface for supporting a hand and a back surface opposite to the supporting surface, the lighting through hole and the alarm sound through hole are arranged on the supporting surface, and the key through hole is arranged on the supporting surface or the back surface; the handrail is a hollow pipe.

The utility model has the advantages that: the circuit board of the utility model comprises a microcontroller circuit, a key switch, a lighting circuit, an alarm circuit, a charging circuit and a battery interface; the lighting circuit comprises an LED lamp, the alarm circuit comprises a buzzer, wherein the LED lamp can be controlled to be lightened and the buzzer can be controlled to give an alarm sound by pressing the key switch, so that the circuit board can be mounted on the handrail to meet the night lighting function and the alarm function of the handrail, and the handrail is convenient to use.

Drawings

Fig. 1 is a schematic structural diagram of a circuit board module according to an embodiment of the present invention;

fig. 2 is a circuit diagram of a microcontroller circuit, a lighting circuit and an alarm circuit provided by an embodiment of the present invention;

fig. 3 is a circuit diagram of a charging circuit provided by an embodiment of the present invention;

fig. 4 is a circuit diagram of a power filter circuit provided by an embodiment of the present invention;

fig. 5 is a schematic structural diagram of an armrest apparatus according to an embodiment of the present invention.

Reference numerals:

100 circuit boards, 10 microcontroller circuits, 20 lighting circuits, 30 alarm circuits, 40 charging circuits, 50 power supply filter circuits, 200 rechargeable batteries, 300 handrail devices, 301 device bodies and 3011 handrails;

the through hole of the a1 button, the through hole of the a2 illumination, the through hole of the a3 alarm sound and the through hole of the a4 charging.

Detailed Description

The present invention will be described in detail with reference to specific embodiments.

Referring to fig. 1 to 4, a circuit board module according to an embodiment of the present invention includes a circuit board 100 and a rechargeable battery 200 for providing power to the circuit board 100. The utility model discloses a circuit board module, as shown in fig. 1, its simple structure, the volume is less, can conveniently install on various product article, for example can install on various armrest apparatus, armrest apparatus if can be the handrail frame, the walking stick, the door handle etc. on seat, bed fence, closestool limit, for the ease of use, circuit board module can install on armrest apparatus's handrail position, like the handrail position of seat, bed fence, the handrail position of walking stick etc.. It can be understood that the circuit board module of the present invention can also be installed on a desk, a wall surface or other objects, and is not limited thereto.

The specific structure of the circuit board module of the present invention will be further described below.

The circuit board 100 includes a microcontroller circuit 10, a key switch S1, a lighting circuit 20, an alarm circuit 30, a charging circuit 40, and a battery interface CN1.

The key switch S1, the lighting circuit 20 and the alarm circuit 30 are electrically connected to the microcontroller circuit 10, and the battery interface CN1 is used for electrically connecting to the rechargeable battery 200. The lighting circuit 20 and the alarm circuit 30 are both electrically connected to the battery interface CN1, so as to electrically connect the rechargeable battery 200 through the battery interface CN1, and thus the rechargeable battery 200 provides a power supply voltage for the lighting circuit 20 and the alarm circuit 30. The charging circuit 40 is electrically connected to the battery interface CN1, and is configured to charge the rechargeable battery 200.

The lighting circuit 20 includes an LED lamp, and the alarm circuit 30 includes a buzzer BELL. The key switch S1 is used for providing key operation, and the microcontroller circuit 10 controls the LED lamp to be turned on or off according to the pressing condition of the key switch S1, and controls the buzzer BELL to alarm or turn off. When the duration of the key switch S1 being pressed is greater than or equal to a first preset duration, the microcontroller circuit 10 controls the LED lamp to illuminate and the buzzer BELL to sound an alarm, where the first preset duration may be, for example, 5S or 10S, and may be set according to actual needs. Alternatively, when the key switch S1 is continuously pressed for more than 5S, the microcontroller circuit 10 controls the LED lamp to illuminate and the buzzer BELL to sound an alarm at the same time. Under the condition that the LED lamp lights while the buzzer BELL sounds an alarm sound, when the key switch S1 is pressed, the microcontroller circuit 10 controls the buzzer BELL to stop giving the alarm sound, and when the key switch S1 is pressed again the LED lamp goes out. In other words, after the microcontroller 10 controls the LED lamp to emit light and the buzzer BELL to emit an alarm sound at the same time, if the key switch S1 is pressed twice in sequence, the buzzer BELL and the LED lamp stop working in sequence, the former stops emitting the alarm sound, and the latter stops emitting the alarm sound.

When the pressed time of the key switch S1 is shorter than a first preset time, the microcontroller circuit 10 controls the LED to light up, and when the key switch S1 is pressed again, the LED lamp is turned off.

More specifically, in the case where both the LED lamp and the buzzer BELL are not operated, the momentary pressing of the key switch S1 releases the key switch S1, at which time the LED lamp can be controlled to be turned on, and then the pressing of the key switch S1 again can control the LED lamp to be turned off. And under the condition that the LED lamp and the buzzer BELL do not work, if the key switch S1 is continuously pressed for a first preset time length or longer, the LED lamp can be controlled to be turned on and the buzzer BELL is controlled to give an alarm, then the key switch S1 is pressed twice in sequence, and the buzzer BELL and the LED lamp can be controlled to stop working sequentially.

Through the utility model discloses a circuit board 100 can realize the function of illumination and warning, consequently when installing the circuit board on the handrail, can realize the illumination and the alarming function of handrail, facilitates the use.

Optionally, under the condition that the LED lamp is on, if the LED lamp is on for more than a second preset time period, the microcontroller circuit 10 controls the LED lamp to go out. The second preset time period may be, for example, 60s or 120s, and may be specifically set according to actual needs.

With reference to fig. 2, in the embodiment of the present invention, the microcontroller circuit 10 includes a first chip IC1, a first resistor R1, and a first capacitor C1.

First chip IC1 includes VCC pin, GND pin, PA0 pin, PA1 pin, PA2 pin, PA3 pin, PA4 pin and PA5 pin, first resistance R1 'S first end electric connection VCC voltage source, first resistance R1' S second end with first capacitance C1 'S first end key switch S1' S PA1 pin electric connection, first capacitance C1 'S second end and key switch S1' S second end all ground connection, first chip IC1 'S VCC pin electric connection VCC voltage source, first chip IC 1' S GND pin ground connection, first chip IC1 'S PA0 pin is unsettled, first chip' S PA4 pin and PA5 pin respectively with warning circuit 30 with lighting circuit 20 electric connection.

Further, the microcontroller circuit 10 further includes a programming interface CN2, where the programming interface CN2 includes first to fourth pins. The first pin of the programming interface CN2 is electrically connected to the VCC voltage source, the second pin and the third pin of the programming interface CN2 are electrically connected to the PA2 pin and the PA3 pin of the first chip IC1, respectively, and the fourth pin of the programming interface CN2 is grounded. By programming the interface CN2, control instructions can be written to the microcontroller circuit 10.

It is understood that the first chip IC1 can detect the pressing operation of the key switch S1 through the pin PA1, and then generate a control signal according to the pressing operation of the key switch S1 to control the operations of the LED lamp and the buzzer BELL, for example, when the pressing time of the key switch S1 is longer than or equal to a first preset time, the first chip IC1 sends control signals to the alarm circuit 30 and the lighting circuit 20 through the pin PA4 and the pin PA5, respectively, so as to control the LED lamp to light and control the buzzer to send an alarm sound. The first chip IC1 may receive a control command written by the programming interface CN2 through the PA2 pin and the PA3 pin.

The lighting circuit 20 further includes a second chip IC2, a first MOS transistor Q1, a second resistor R2, and a third resistor R3. The second chip IC2 includes a VDD pin, a GND pin and an LED pin, the first end of the second resistor R2 is electrically connected to the PA5 pin of the first chip IC1, the second end of the second resistor R2 is electrically connected to the first end of the third resistor R3 and the gate of the first MOS transistor Q1, the second end of the third resistor R3 and the source of the first MOS transistor Q1 are all grounded, the drain of the first MOS transistor Q1 is electrically connected to the GND pin of the second chip IC2 and the cathode of the LED lamp, the LED pin of the second chip IC2 is electrically connected to the anode of the LED lamp, and the VDD pin of the second chip IC2 is electrically connected to the anode BAT of the battery interface CN1.

When the LED lamp is controlled to be lightened, the first chip IC1 sends a control signal of a high level through the PA5 pin, so that the first MOS tube Q1 is controlled to be conducted, the cathode of the LED lamp can be grounded to form a passage, and the LED pin of the second chip IC2 provides driving voltage for the LED lamp, so that the LED lamp is lightened. When the LED lamp is required to be controlled to be turned off, the first chip IC1 sends out a low-level control signal through the PA5 pin, so that the first MOS tube Q1 is controlled to be disconnected, a branch circuit where the LED lamp is located is disconnected, and the LED lamp is controlled to be turned off.

Further, the alarm circuit 30 further includes a fourth resistor R4, a fifth resistor R5, a second MOS transistor Q2, and a first diode D1. The first end of the fourth resistor R4 is electrically connected with the PA4 pin of the first chip IC1, the second end of the fourth resistor R4 is electrically connected with the first end of the fifth resistor R5 and the grid electrode of the second MOS tube Q2, the second end of the fifth resistor R5 is electrically connected with the source electrode of the second MOS tube Q2, the drain electrode of the second MOS tube Q2 is electrically connected with the anode of the first diode D1 and the cathode of the buzzer BELL, and the cathode of the first diode D1 and the cathode of the buzzer BELL are electrically connected with the anode BAT of the battery interface CN1.

When the buzzer BELL needs to be controlled to give an alarm, the first chip IC1 sends a high-level control signal through the PA4 pin so as to control the conduction of the second MOS tube Q2, so that the negative electrode of the buzzer BELL can be grounded to form a channel, and the buzzer BELL can be driven to work under the condition that the positive electrode BAT of the battery interface CN1 provides working voltage so as to give an alarm; when buzzer BELL stops working, first chip IC1 sends the control signal of low level through the PA4 pin to control second MOS pipe Q2 disconnection, thereby make the branch circuit at buzzer BELL place form and open circuit, thereby control buzzer BELL stop working.

In the embodiment of the present invention, as shown in fig. 3, the charging circuit 40 includes a charging interface CN3, a third chip IC3, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, and a second capacitor C2.

The third chip IC3 comprises a TEMP pin, a PROG pin, a GND pin, a VCC pin, a CE pin and a BAT pin; the TEMP pin and the GND pin of the third chip IC3 are both grounded, the PROG pin of the third chip IC3 is electrically connected to the first end of the sixth resistor R6, the VCC pin and the CE pin of the third chip IC3 and the first end of the second capacitor C2 are both electrically connected to the VBUS voltage source, the second end of the sixth resistor R6 and the second end of the second capacitor C2 are both grounded, and the BAT pin of the third chip IC3 is electrically connected to the positive electrode BAT of the battery interface CN1. Wherein the negative electrode of the battery interface CN1 is grounded.

The charging interface CN3 comprises first to sixth pins, the first pin and the sixth pin of the charging interface CN3 are both grounded, the second pin and the fifth pin of the charging interface CN3 are both electrically connected to the first end of the seventh resistor R7, the second end of the seventh resistor R7 is electrically connected to the VBUS voltage source, the third pin of the charging interface CN3 is electrically connected to the first end of the eighth resistor R8, the fourth pin of the charging interface CN3 is electrically connected to the first end of the ninth resistor R9, and the second end of the eighth resistor R8 and the second end of the ninth resistor R9 are both grounded.

Wherein, interface CN3 that charges can be TYPE-C interface, when need charge rechargeable battery 200, can utilize the data line that TYPE-C connects to be connected interface CN3 and the external power supply that charges to utilize charging circuit 40 can realize charging rechargeable battery 200.

As shown in fig. 4, in the embodiment of the present invention, the circuit board 100 further includes a power filter circuit 50, and the power filter circuit 50 includes a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, a tenth resistor R10, and a second diode D2.

The first end of the third capacitor C3, the first end of the fourth capacitor C4, and the first end of the tenth resistor R10 are all electrically connected to the positive electrode BAT of the battery interface CN1, the first end of the fifth capacitor C5, the first end of the sixth capacitor C6, the first end of the seventh capacitor C7, and the negative electrode of the second diode D2 are all electrically connected to the VCC voltage source, and the second end of the third capacitor C3, the second end of the fourth capacitor C4, the second end of the fifth capacitor C5, the second end of the sixth capacitor C6, the second end of the seventh capacitor C7, and the positive electrode of the second diode D2 are all grounded.

Through the power filter circuit 50, the power supply voltage of the rechargeable battery 200 can be filtered, so that interference signals are removed, and the stability of the power supply voltage is improved.

In a specific implementation circuit, values of each element may be, for example: the value of the first resistor R1 is 10KΩ, the value of the first capacitor C1 is 0.1uF, the values of the second resistor R2 and the third resistor R3 are 1KΩ and 10KΩ respectively, the power of the LED lamp is 0.25W, the values of the fourth resistor R4 and the fifth resistor R5 are 1KΩ and 10KΩ respectively, the value of the sixth resistor R6 is 1.5KΩ, the value of the second capacitor C2 is 10uF, the values of the seventh resistor R7, the eighth resistor R8, the ninth resistor R9 and the tenth resistor R10 are 0.4 Ω, 5.1KΩ and 10 Ω respectively, the values of the third capacitor C3, the fourth capacitor C4, the fifth capacitor C5, the sixth capacitor C6 and the seventh capacitor C7 are 10uF, 0.1uF, 10uF, 0.1uF and 10uF respectively, and the conduction voltage of the second diode D2 is 5V.

Referring to fig. 5, an embodiment of the present invention further provides a handrail device 300, which includes a device main body 301 and a circuit board module, where the circuit board module is the circuit board module shown in the embodiment of fig. 1. The device body 301 is provided with a handrail 3011, and the circuit board module is mounted on the handrail 3011.

It is understood that the armrest apparatus 300 according to the embodiment of the present invention can be, for example, a seat, a sofa, a bed fence, a toilet seat side armrest frame, a corridor armrest, a crutch, etc., and the armrest apparatus 300 shown in fig. 5 is a bedside armrest frame for bedside assistance, which has an armrest 3011, and the circuit board module is mounted on the armrest 3011. For another example, if the armrest apparatus 300 is a chair or a sofa, the circuit board module may be mounted on an armrest of the chair or the sofa, and if the armrest apparatus 300 is a crutch, the circuit board module may be mounted on an armrest portion of the crutch.

In some embodiments, the inside of the handrail 3011 is a hollow cavity, the circuit board module is disposed in the hollow cavity of the handrail 3011, and the handrail 3011 is provided with a key through hole a1, an illumination through hole a2, and an alarm through hole a3. The key switch S1 in the circuit board 100 of the circuit board module corresponds to the key through hole a1, the LED lamp of the circuit board 100 corresponds to the lighting through hole a2, and the buzzer BELL of the circuit board 100 corresponds to the alarm through hole a3.

The key switch S1 can extend out of the key through hole a1, so that the key switch S1 can be conveniently pressed; the LED lamp can also extend out of the lighting through hole a2, so that light can be conveniently diffused; and the buzzer BELL does not extend out of the alarm sound through hole a3, so that the buzzer BELL is protected. In addition, still be provided with the through-hole a4 that charges on handrail 3011, the interface CN3 that charges on circuit board 100 stretches out from through-hole a4 that charges to in connection data line.

The handrail 3011 comprises a supporting surface for supporting a hand and a back surface opposite to the supporting surface, the lighting through hole a2 and the alarm sound through hole a3 are arranged on the supporting surface, and the key through hole a1 is arranged on the supporting surface or the back surface. Of course, in other embodiments, the key through hole a1, the illumination through hole a2, the warning sound through hole a3, and the charging through hole a4 may be disposed at any position of the armrest 3011 as needed, which is not limited thereto. The handrail 3011 may be a hollow circular tube, or a square tube or a tube structure with other shapes.

Of course, in other embodiments, the circuit board module may also be mounted on the surface of the armrest, for example, the circuit board module may be mounted on the outside of the armrest apparatus by means of pasting, binding, and the like.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims

1. A circuit board is characterized by comprising a microcontroller circuit, a key switch, a lighting circuit, an alarm circuit, a charging circuit and a battery interface;

under the condition that the LED lamp lights and the buzzer gives an alarm sound, the buzzer stops giving the alarm sound when the key switch is pressed, and the LED lamp goes out when the key switch is pressed again.

2. The circuit board of claim 1, wherein the microcontroller circuit controls the LED lamp to go out when the LED lamp is on for more than a second predetermined time period.

3. The circuit board of claim 1, wherein the microcontroller circuit comprises a programming interface, a first chip, a first resistor, and a first capacitor;

the first chip comprises a VCC pin, a GND pin, a PA0 pin, a PA1 pin, a PA2 pin, a PA3 pin, a PA4 pin and a PA5 pin, the programming interface comprises a first pin to a fourth pin, a first end of a first resistor is electrically connected with a VCC voltage source, a second end of the first resistor is electrically connected with a first end of a first capacitor, a first end of a key switch and the PA1 pin of the first chip, a second end of the first capacitor and a second end of the key switch are both grounded, the VCC pin of the first chip is electrically connected with the VCC voltage source, the GND pin of the first chip is grounded, the PA0 pin of the first chip is suspended, and the PA4 pin and the PA5 pin of the first chip are respectively electrically connected with the alarm circuit and the lighting circuit; the first pin of the programming interface is electrically connected with the VCC voltage source, the second pin and the third pin of the programming interface are respectively and electrically connected with the PA2 pin and the PA3 pin of the first chip, and the fourth pin of the programming interface is grounded.

4. The circuit board of claim 3, wherein the lighting circuit further comprises a second chip, a first MOS transistor, a second resistor, and a third resistor;

5. The circuit board of claim 3, wherein the alarm circuit further comprises a fourth resistor, a fifth resistor, a second MOS transistor and a first diode;

6. The circuit board of claim 1, wherein the charging circuit comprises a charging interface, a third chip, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, and a second capacitor;

7. The circuit board of claim 1, further comprising a power filter circuit, wherein the power filter circuit comprises a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, a tenth resistor, and a second diode;

8. A circuit board module, comprising a circuit board and a rechargeable battery for supplying power to the circuit board, wherein the circuit board is the circuit board according to any one of claims 1 to 7.

9. A handrail device comprising a device body with a handrail and a circuit board module as claimed in claim 8, the circuit board module being mounted on the handrail of the device body.

10. The handrail device of claim 9, wherein the handrail has a hollow cavity inside, the circuit board module is disposed in the hollow cavity of the handrail, and the handrail is provided with a key through hole, an illumination through hole and an alarm sound through hole; the key switch in the circuit board of the circuit board module corresponds to the key through hole, the LED lamp of the circuit board corresponds to the lighting through hole, and the buzzer of the circuit board corresponds to the alarm through hole.