CN210515216U

CN210515216U - Single-key circuit for head-mounted equipment

Info

Publication number: CN210515216U
Application number: CN201921174751.XU
Authority: CN
Inventors: 段韩路; 李建军
Original assignee: Xilinmen Furniture Co Ltd
Current assignee: Xilinmen Furniture Co Ltd
Priority date: 2019-07-24
Filing date: 2019-07-24
Publication date: 2020-05-12
Anticipated expiration: 2029-07-24

Abstract

The utility model relates to the field of wearable equipment, and provides a single-key circuit for a head-mounted device, which comprises a battery, a soft touch switch, a delay circuit, a power management chip and an MCU control chip; one end of the light touch switch is coupled with the battery, and the other end of the light touch switch generates a high level when being pressed; the power management chip comprises an enabling end, a power input end and a power output end, wherein the enabling end is coupled to the delay circuit and receives the long level, and the power input end is coupled to the battery; the power supply management chip receives a first direct current voltage at a power supply input end, receives a high level at an enable end and outputs a second direct current voltage at a power supply output end at the same time; the MCU control chip comprises a power supply end, a control signal output end and a signal input end; the control signal output end is coupled with the enable end, and after the MCU chip is electrified, the control signal output end keeps a starting state by outputting a high level and cuts off a power supply by outputting a low level; the on-off and logic operation can be realized through one key.

Description

Single-key circuit for head-mounted equipment

Technical Field

The utility model relates to a wearing equipment technical field, the more specifically single button circuit for head-mounted apparatus that says so, mainly used delay switch machine and click the operation.

Background

At present, more and more portable battery-powered electronic devices are required to be portable in size, simple in operation and extremely low in power consumption, especially on wearable electronic devices.

At present, the 'shutdown' of many devices is actually soft shutdown by letting the MCU enter a sleep mode, and the power is not cut off. When the computer is started up again, the MCU is awakened by interruption to continue working. In order to shut down the battery by cutting off the power supply, a power switch needs to be additionally installed to physically cut off the battery. The switch takes up space in the device and, if the device is equipped with other function keys, it would certainly overshadow the valuable space in the wearable device.

Therefore, it is necessary to integrate additional key power into the wearable device while ensuring that the power can be cut off by the key.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved in the present invention is to overcome the above-mentioned defects existing in the prior art, and one of the objects is to provide a single-button circuit for a head-mounted device, which can be used for both a switching power supply and a logic control through a button.

In order to achieve the above object, the utility model discloses a following technical scheme can realize: a single-key circuit for head-mounted equipment comprises a battery/battery pack, a soft-touch switch, a delay circuit, a power management chip and an MCU control chip; the battery/battery pack is used for providing a first direct current voltage; one end of the light touch switch is coupled with the battery or the battery pack, and the other end of the light touch switch generates a high level which is longer or shorter when being pressed; the input end of the delay circuit is coupled with the light touch switch and delays to output a long level; the power management chip comprises an enabling end, a power input end and a power output end, wherein the enabling end is coupled to the delay circuit and receives the long level, and the power input end is coupled to the battery/battery pack; the power supply management chip receives a first direct current voltage at a power supply input end and receives a high level at an enable end, and simultaneously, the power supply output end of the power supply management chip outputs a second direct current voltage; the MCU control chip comprises a power supply end, a control signal output end and a signal input end, wherein the power supply end is coupled with the battery/battery pack, the control signal output end is used for outputting a high level when the MCU control chip is electrified, and the signal input end is coupled with the light-touch switch; the control signal output end of the MCU chip is coupled to the enabling end of the power management chip, after the MCU chip is electrified, the control signal output end of the MCU chip keeps a starting state by outputting a high level, the power is cut off by outputting a low level, and the signal input end of the MCU chip receives a long or short high level.

The utility model discloses further preferred scheme does: the delay circuit is an RC delay circuit. The RC time delay circuit comprises a pull-down resistor R1, a current-limiting resistor R2, a discharging resistor R3 and a charging capacitor C1; one end of the pull-down resistor R1 is coupled to the tact switch, and the other end is grounded; one end of the current-limiting resistor R2 is coupled to the touch switch, and the other end is coupled to the enable end of the power management chip; one end of the discharge resistor R3 is coupled to the enable end of the power management chip, and the other end is coupled to the control signal output end of the MCU chip; one end of the charging capacitor C1 is coupled to the enable end of the power management chip, and the other end is grounded.

The utility model discloses further preferred scheme does: the power management chip adopts a voltage stabilizer with the model number of LP 5907; the PIN1 is a power input terminal coupled to a power supply; its PIN2 is connected to ground; the PIN3 is an enabling end; with PIN5 being the power supply output.

The utility model discloses further preferred scheme does: and the MCU control chip adopts an STM32 series single chip microcomputer. The MCU control chip adopts a singlechip of which the model is preferably STM32F 030; the PIN1 is a signal input end and is coupled with the light touch switch through a resistor R4; PIN2 is a control signal output terminal; its PIN3 is connected to ground; PIN4 is the power supply terminal.

The second object of the present invention is to provide a glasses device, comprising the above single-key circuit.

To sum up, the utility model discloses following beneficial effect has: compared with the existing mode, the starting and logic operation functions of the equipment can be realized by using one key, the power supply of the MCU control chip can be cut off, the power consumption is reduced, and the loss caused by long-time over-discharge of the battery is avoided. The whole circuit scheme can be used for battery power supply equipment, integrates the functions of other logic keys, has a simple structure, and saves cost and volume.

Drawings

Fig. 1 is a circuit block diagram of the present invention.

Fig. 2 is a schematic circuit diagram of the present invention.

Fig. 3 is a schematic structural view of an eye device to which the present invention is applied.

In the figure: 1. a battery/battery pack; 2. a tact switch; 3. a delay circuit; 4. a power management chip; 5. and the MCU control chip.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications without inventive contribution to the present embodiment as required after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Example 1: as shown in fig. 1 and 2, a one-key circuit for a head-mounted device is shown, comprising a battery/battery pack 1, a tact switch 2, a delay circuit 3, a power management chip 4 and an MCU control chip 5.

A battery/battery pack 1 for providing a first direct voltage. And a tact switch 2 having one end coupled to the battery 1 or the battery 1 set and the other end generating a high level of either a long or short duration when pressed. And the input end of the delay circuit 3 is coupled to the light touch switch 2 and delays to output a long level. The power management chip 4 includes an enable terminal, a power input terminal and a power output terminal, wherein the enable terminal is coupled to the delay circuit 3 and receives the long level, and the power input terminal is coupled to the battery/battery pack 1. The power management chip 4 receives the first dc voltage at the power input terminal, receives the high level at the enable terminal, and outputs the second dc voltage at the power output terminal. And the MCU control chip 5 comprises a power supply end for being coupled with the battery/battery pack 1, a control signal output end for outputting a high level when the power is on and a signal input end for being coupled with the light-touch switch 2.

The control signal output end of the MCU control chip 5 is coupled to the enable end of the power management chip 4, after the MCU control chip 5 is powered on, the control signal output end keeps a power-on state by outputting a high level, the power supply is cut off by outputting a low level, and the signal input end receives a long or short high level.

In the present embodiment, the delay circuit 3 is an RC delay circuit 3, and the RC delay circuit 3 is composed of a pull-down resistor R1, a current-limiting resistor R2, a discharge resistor R3, and a charging capacitor C1. One end of the pull-down resistor R1 is coupled to the tact switch 2, and the other end is grounded. One end of the current limiting resistor R2 is coupled to the touch switch 2, and the other end is coupled to the enable end of the power management chip 4. One end of the discharge resistor R3 is coupled to the enable end of the power management chip 4, and the other end is coupled to the control signal output end of the MCU control chip 5. One end of the charging capacitor C1 is coupled to the enable end of the power management chip 4, and the other end is grounded.

The power management chip 4 adopts a voltage stabilizer with the model number of LP 5907; the PIN1 is a power input terminal coupled to a power supply; its PIN2 is connected to ground; the PIN3 is an enabling end; with PIN5 being the power supply output.

The MCU control chip 5 adopts an STM32 series single chip microcomputer. The MCU control chip 5 adopts a singlechip with the model number of STM32F 030; PIN1 is a signal input terminal, and is coupled with the light touch switch 2 through a resistor R4; PIN2 is a control signal output terminal; its PIN3 is connected to ground; PIN4 is the power supply terminal.

The working principle of the utility model is as follows:

starting up operation: in the shutdown state, the device (power management chip 4, MCU control chip 5, and other peripheral operating circuits connected to the MC U) is completely powered off, and the power consumption is at the lowest level. When the tact switch 2 (i.e., S1) is pressed, the battery 1 voltage charges the charging capacitor C1 through the tact switch 2 (i.e., S1) and the current limiting resistor R2. Calculating the charging time: t = RC × ln [ (V1-V0)/(V1-VT) ], V1 is the battery 1 voltage, V0 is the initial voltage of the capacitor, VT is the lowest voltage of the power management chip 4 enabling driving, and the initial voltage is generally 0 due to the discharge resistance R1, so the charging time is T = RC × ln [ V1/(V1-VT) ].

When the voltage of the charging capacitor C1 reaches the enabled working level of the power management chip 4, the equipment is started to supply power, the MCU control chip 5 is initialized after being powered on to pull up the PIN2 (IO 1) to enable the VT voltage to be constant, and the VT voltage is unchanged after the soft touch switch 2 (namely S1) is released at the moment, so that the level is not influenced, and the power management chip 4 keeps the enabled state unchanged. The MCU control chip 5 (and other peripheral operating circuits) continues to operate when powered on.

The tact switch 2 operates: in the power-on state, the MCU control chip 5M5 can continuously scan whether the tactile switch 2 has a key action, including long pressing, short pressing or fast double-clicking, through the IO2 to execute the related logic operations.

Shutdown operation: by means of the pre-recorded program, in the power-on state, the MCU control chip 5 detects the key operation through the PIN1 (IO 2). Judging the key-press time length to meet the shutdown time, the MCU control chip 5 starts to execute the shutdown operation, the task can be ended firstly, and after the data is stored, the MCU control chip 5 outputs low level through the PIN2, and pulls down the enable end connected with the power management chip 4. And after the enabling end of the power management chip 4 is pulled down, the power supply to the MCU control chip 5 is closed, and the work is stopped. At this time, the MCU control chip 5 is completely powered down, no current is consumed, and the device enters a shutdown state.

Example 2: as shown in fig. 3, there is shown an eyeglass device including the one-key circuit shown in embodiment 1.

Claims

1. A single-key circuit for a head-mounted device, comprising: including batteries/battery packs, touch-sensitive

The system comprises a switch, a delay circuit, a power management chip and an MCU control chip;

the battery/battery pack is used for providing a first direct current voltage;

one end of the light touch switch is coupled with the battery or the battery pack, and the other end of the light touch switch generates a high level which is longer or shorter when being pressed;

the input end of the delay circuit is coupled with the light touch switch and delays to output a long level;

the power management chip comprises an enabling end, a power input end and a power output end, wherein the enabling end is coupled to the delay circuit and receives the long level, and the power input end is coupled to the battery/battery pack;

the power supply management chip receives a first direct current voltage at a power supply input end and receives a high level at an enable end, and simultaneously, the power supply output end of the power supply management chip outputs a second direct current voltage;

the MCU control chip comprises a power supply end, a control signal output end and a signal input end, wherein the power supply end is coupled with the battery/battery pack, the control signal output end is used for outputting a high level when the MCU control chip is electrified, and the signal input end is coupled with the light-touch switch;

the control signal output end of the MCU chip is coupled to the enabling end of the power management chip, after the MCU chip is electrified, the control signal output end of the MCU chip keeps a starting state by outputting a high level, the power is cut off by outputting a low level, and the signal input end of the MCU chip receives a long or short high level.

2. The single-key circuit for a head-mounted device according to claim 1, wherein: the delay circuit is an RC delay circuit.

3. The single-key circuit for a head-mounted device according to claim 2, wherein: the RC time delay circuit comprises a pull-down resistor R1, a current-limiting resistor R2, a discharging resistor R3 and a charging capacitor C1; one end of the pull-down resistor R1 is coupled to the tact switch, and the other end is grounded; one end of the current-limiting resistor R2 is coupled to the touch switch, and the other end is coupled to the enable end of the power management chip; one end of the discharge resistor R3 is coupled to the enable end of the power management chip, and the other end is coupled to the control signal output end of the MCU chip; one end of the charging capacitor C1 is coupled to the enable end of the power management chip, and the other end is grounded.

4. The one-key circuit for a head-mounted device according to any one of claims 1 to 3, wherein: the power management chip adopts a voltage stabilizer with the model number of LP 5907; the PIN1 is a power input terminal coupled to a power supply; its PIN2 is connected to ground; the PIN3 is an enabling end; with PIN5 being the power supply output.

5. The single-key circuit for a head-mounted device according to claim 3, wherein: and the MCU control chip adopts an STM32 series single chip microcomputer.

6. The single-key circuit for a head-mounted device according to claim 5, wherein: the MCU control chip adopts a single chip microcomputer with the model of STM32F 030; the PIN1 is a signal input end and is coupled with the light touch switch through a resistor R4; PIN2 is a control signal output terminal; its PIN3 is connected to ground; PIN4 is the power supply terminal.