CN215256893U

CN215256893U - Double-button controlled neck hanging fan

Info

Publication number: CN215256893U
Application number: CN202120800452.3U
Authority: CN
Inventors: 郑冬生
Original assignee: Momax Technology Shenzhen Co ltd
Current assignee: Momax Technology Shenzhen Co ltd
Priority date: 2021-04-19
Filing date: 2021-04-19
Publication date: 2021-12-21
Anticipated expiration: 2031-04-19

Abstract

The utility model relates to a hang neck formula fan of two keying controls. The hanging neck type fan comprises a hanging neck main body, a fan assembly, a control unit and a power supply battery electrically connected with the control unit; the fan assembly comprises a first fan blade positioned on one side of the neck hanging main body, a first driving piece in driving connection with the first fan blade, a second fan blade positioned on the other side of the neck hanging main body, and a second driving piece in driving connection with the second fan blade; the control assembly comprises a first key and a second key which are respectively positioned on two sides of the neck hanging body; the first key and the second key are electrically connected with the control unit to send control signals to the control unit; the first driving piece and the second driving piece are electrically connected with the control unit so as to receive the operation signals sent by the control unit and operate simultaneously according to the operation signals. When the user wears this string of neck main part and uses in neck department, the button on the arbitrary side of accessible carries out the control of the mode of fan, effectively improves user's experience and feels.

Description

Double-button controlled neck hanging fan

Technical Field

The utility model relates to a fan technical field, more specifically say, relate to a hang neck formula fan of two keying control.

Background

In hot summer, electric fans, air conditioners and the like are cooling equipment which are most commonly used by people, but the cooling equipment can only be used indoors and cannot be carried about, when people go out or have an open rest, the people can only cool themselves by using fans or natural wind, but the people do not have the natural wind many times and are tired by using the fans. In response to this situation, various portable fans have appeared on the market, which are mostly hand-held, inconvenient to take and store, and tired if being held for a long time.

And hang neck formula fan can supply the user to dress in the neck department, has released user's both hands, has improved the convenience of using. However, the existing hanging neck type fan is provided with only one control key, and the key is arranged on one side of the hanging neck type fan, when a user wears the hanging neck type fan on the neck for use, the user cannot see which side of the hanging neck type fan the key is positioned on due to sight, and the key is inconvenient to find, so that the control of the working mode of the fan blades is inconvenient, and the inconvenience is brought to the use of the user.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in, only have a button on the above-mentioned neck formula fan of hanging to prior art for when using the neck formula fan, be not convenient for find the defect of button, provide a neck formula fan of hanging of two button controls.

The utility model provides a technical scheme that its technical problem adopted is: construct a double key controlled hanging neck fan, comprising:

a neck hanging main body worn on the neck of the user;

the fan assembly comprises a first fan blade and a first driving piece, wherein the first fan blade is positioned on one side of the neck hanging main body, and the first driving piece is in driving connection with the first fan blade; the second fan blade is positioned on the other side of the neck hanging main body, and the second driving piece is in driving connection with the second fan blade;

the control assembly comprises a first key and a second key which are respectively positioned on two sides of the neck hanging body;

the first key and the second key are electrically connected with the control unit so as to send control signals to the control unit; the first driving piece and the second driving piece are electrically connected with the control unit so as to receive operation signals which are sent by the control unit and correspond to the control signals, and the operation signals are operated simultaneously; and

and the power supply battery is electrically connected with the control unit.

Preferably, the operation signal includes PWM, and the double-button controlled neck hanging fan further includes a voltage boosting unit outputting an operation voltage according to the PWM;

the boost unit comprises a first mos tube Q1, a first inductor L1, a first diode D1 and a second capacitor C2, the grid of the first mos tube Q1 is electrically connected with the control unit, the source electrode is grounded, the drain electrode passes through the first diode D1 and the positive electrode of the first driving piece and the second driving piece are electrically connected, the positive electrode of the first driving piece and the second driving piece passes through the second capacitor C2 and the negative electrode is grounded, and the positive electrode of the first diode D1 passes through the first inductor L1 and the positive electrode of the power supply battery are electrically connected.

Preferably, the control device further comprises an overvoltage detection unit for outputting working currents of the first driving piece and the second driving piece, and an enable control unit for receiving an enable signal sent by the control unit according to the working currents and turning on or off working circuits of the first driving piece and the second driving piece;

the overvoltage detection unit comprises a second resistor R2 and a third resistor R3, one end of the second resistor R2 is electrically connected with the anodes of the first driving piece and the second driving piece, the other end of the second resistor R3526 is electrically connected with the control unit, one end of the third resistor R3 is electrically connected between the second resistor R2 and the control unit, and the other end of the third resistor R3 is grounded;

the enabling control unit comprises a second mos tube Q2 and a ninth resistor R9, the grid electrode of the second mos tube Q2 is electrically connected with the control unit, one path of the source electrode is electrically connected with the grid electrode through the ninth resistor R9, the other path of the source electrode is grounded, and the drain electrode is electrically connected with the cathodes of the first driving piece and the second driving piece.

Preferably, the charging management unit further comprises a charging interface and a charging management unit for controlling the power supply battery to be charged according to the charging level input into the charging interface;

the charging management unit comprises a charging management chip U3, a tenth resistor R10, a fourth capacitor C4 and a fifth capacitor C5, a monitoring pin PROG of the charging management chip U3 is grounded through the tenth resistor R10, a power ground pin GND is grounded, one path of a positive input pin VCC is electrically connected with a charging level input pin of the charging interface, the other path of the positive input pin VCC is grounded through the fourth capacitor C4, one path of a battery electrical connection pin BAT is electrically connected with the anode of the power supply battery, and the other path of the battery electrical connection pin BAT is grounded through the fifth capacitor C5.

Preferably, the charging management unit further comprises a charging detection unit for outputting a charging signal according to a charging level input to the charging interface, and a state indication unit for displaying a full-charge state according to a full-electric signal output by the charging management unit, displaying a charging state according to the charging signal, and displaying a low-power state according to a working voltage of the power supply battery;

the charging detection unit comprises a sixth resistor R6 and a seventh resistor R7, one end of the sixth resistor R6 is electrically connected with a charging level input pin of the charging interface, one path of the other end of the sixth resistor R3526 is grounded through the seventh resistor R7, and the other path of the sixth resistor R3526 is electrically connected with the control unit;

the charging state pin CHR of the charging management chip U3 is electrically connected with the control unit through an eleventh resistor R11 in one path, and the other path is grounded through a twelfth resistor R12;

the state indicating unit comprises a first resistor R1 and an indicator light, wherein one end of the first resistor is electrically connected with the anode of the power supply battery, and the other end of the first resistor is electrically connected with the control unit through the indicator light.

Preferably, the battery protection device further comprises a battery protection unit, the battery protection unit comprises a battery protection chip U2, a third capacitor C3 and an eighth resistor R8, one path of a power input pin VDD of the battery protection chip U2 is electrically connected with the positive electrode of the power supply battery through the eighth resistor R8, the other path of the power input pin VDD is electrically connected with the negative electrode of the power supply battery through the third capacitor C3, a ground pin GND is electrically connected with the negative electrode of the power supply battery, and two load negative electrode pins VM are grounded.

Preferably, the control unit comprises an MCU chip U1 and a first capacitor C1, a voltage pin VDD of the MCU chip U1 is electrically connected to the positive electrode of the power supply battery, a common pin VSS is grounded, and the positive electrode of the power supply battery is grounded through the first capacitor C1;

the MCU chip U1 further comprises a first control pin PIO1 for sending display signals corresponding to a full power state, a charging state and a low power state according to a full power signal, a charging signal and a working voltage, a fifth control pin PIO5 for outputting an enable signal according to a working current signal, a third control pin PIO3 for receiving the working current signal, a fourth control pin PIO4 for outputting a corresponding running signal according to the control signal, a second control pin PIO2 for receiving the charging signal and the control signal, and a sixth control pin PIO6 for receiving the full power signal; and each control pin of the MCU chip U1 is electrically connected with a unit and a device with corresponding functions.

Preferably, hang the neck main part and be the setting of U-shaped, it is including the air-out section that is located both ends, the air-out section is including the installation position that is located its terminal confession installation flabellum, driving piece, with installation position intercommunication and edge the wind channel that the length direction of air-out section extends and with the device storage tank that the wind channel is separated by the setting, set up on the air-out section with the air outlet of wind channel intercommunication.

Preferably, the power supply battery includes a first battery and a second battery, the first fan blade, the first driving member, the first key and the control unit are correspondingly installed in the air outlet section on one side, the second battery, the second fan blade, the second driving member and the second key are correspondingly installed in the air outlet section on the other side, and the first key and the second key are located on one side of the air outlet section opposite to the air outlet and penetrate out of the air outlet section.

Preferably, the first key, the first driving member and the first battery are electrically connected to a first connector J1 through terminals thereof, the second key, the second driving member and the second battery are electrically connected to a second connector J2 through terminals thereof, and the first connector J1 and the second connector J2 are correspondingly electrically connected through a flat cable; the first key and the second key are point contact keys.

Implement the utility model discloses a two button control hang neck formula fan has following beneficial effect:

through set up two buttons in hanging the neck main part to these two buttons are located the both sides of hanging the neck main part, make when the user will hang the neck main part and dress when neck department uses, the button on the arbitrary one side of accessible carries out the control of the mode of flabellum, effectively improves user's experience and feels.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

fig. 1 is a perspective view of a neck hanging fan controlled by two keys according to the present invention;

FIG. 2 is an exploded view of the dual button controlled muffler fan of FIG. 1;

fig. 3 is a circuit block diagram of the neck hanging fan controlled by double keys according to the present invention;

fig. 4 is a circuit diagram of the boosting unit and the enable control unit of the present invention;

fig. 5 is a circuit diagram of the charging interface of the present invention;

fig. 6 is a circuit diagram of the charge management unit of the present invention;

fig. 7 is a circuit diagram of a battery protection unit of the present invention;

fig. 8 is a circuit diagram of the control unit, the charging detection unit, the status indication unit, and the overvoltage detection unit of the present invention;

fig. 9 is a circuit diagram of a first connector of the present invention;

fig. 10 is a circuit diagram of a second connector of the present invention.

In the drawing, 1, a neck hanging body, 11, an air outlet section, 11a, a first shell, 11b, a second shell, 111, a mounting position, 112, an air duct, 113, a device accommodating groove, 114, an air outlet, 21, a first fan blade, 22, a first driving piece, 23, a first battery, 24, a first key, 31, a second fan blade, 32, a second driving piece, 33, a second battery, 34, a second key, 10, a control unit, 20, a boosting unit, 30, an overvoltage detection unit, 40, an enable control unit, 50, a charging interface, 60, a charging management unit, 70, a charging detection unit, 80, a state indication unit, 801, an indicator light, 90, a battery protection unit, J1, a first connector and J2, a second connector are included.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the following description, in conjunction with the examples and the accompanying drawings, is intended to illustrate the present invention in further detail, and the exemplary embodiments and the description thereof are only used for explaining the present invention, and are not intended to limit the present invention.

Fig. 1 and 2 show the hanging neck type fan controlled by two keys of the utility model, as shown in fig. 1 and 2, the hanging neck type fan controlled by two keys includes a hanging neck main body 1, a fan component, a control unit 10 and a power supply battery electrically connected with the control unit 10, and the hanging neck main body 1 can be worn by a user at the neck, thereby releasing both hands of the user and improving the convenience of use.

The fan assembly comprises a first fan blade 21 and a first driving piece 22 which are positioned on one side of the neck hanging main body 1, and a second fan blade 31 and a second driving piece 32 which are positioned on the other side; the first driving member 22 is in driving connection with the first fan blade 21, and the second driving member 32 is in driving connection with the second fan blade 31, so that the rotation and stop of the fan blades are driven by the driving members. The first driving member 22 and the second driving member 32 can be driven by driving motors, and output shafts of the driving motors are connected with the fan blades.

The control component comprises a first key 24 and a second key 34, wherein the first key 24 and the second key 34 are respectively positioned on two sides of the neck hanging body 1, and the first key 24 and the second key 34 are mechanical keys.

The control unit 10 is configured to receive and send an instruction signal, wherein the first button 24 and the second button 34 are electrically connected to the control unit 10 to send a control signal to the control unit 10; the first driving member 22 and the second driving member 32 are electrically connected to the control unit 10 to receive the operation signals corresponding to the control signals sent by the control unit 10, and operate simultaneously according to the operation signals. The control signal may include a gear signal and a stop signal, and the operation signal includes a driving signal and a stop driving signal of each gear.

The operation signal sent by the control unit 10 includes PWM, specifically including PWM corresponding to the driving signal of each gear and PWM corresponding to the stop driving signal. Further, the double-key controlled hanging neck type fan further includes a voltage boosting unit 20, as shown in fig. 3, the voltage boosting unit 20 is connected between the control unit 10 and the first driving member 22 and the second driving member 32, and is configured to receive the PWM sent by the control unit 10, output corresponding operating voltages to the first driving member 22 and the second driving member 32 according to the PWM, and control the first driving member 22 and the second driving member 32 to drive or stop driving at the same time.

Further, the double-key controlled hanging neck type fan further comprises an overvoltage detection unit 30 and an enable control unit 40, the overvoltage detection unit 30 and the enable control unit 40 are respectively connected between the first driving piece 22 and the control unit 10, and the overvoltage detection unit 30 is used for outputting working currents of the first driving piece 22 and the second driving piece 32 to the control unit 10; the enabling control unit 40 is configured to receive an enabling signal sent by the control unit 10 according to the working current, and turn on or off the working circuits of the first driving element 22 and the second driving element 32 according to the enabling signal.

It can be understood that, when the first driving element 22 and the second driving element 32 are in the driving state and the first driving element 22 and/or the second driving element 32 are blocked by the foreign object, the working current output from the overvoltage detection unit 30 to the control unit 10 will be larger than the normal working current, and when the control unit 10 determines that the working current is too large, the control unit 10 outputs the shutdown enable signal to the enable control unit 40, and the enable control unit 40 shuts down the working circuit of the first driving element 22 and the second driving element 32. The utility model discloses in, through the operating current who detects first driving piece 22, second driving piece 32, control switching on and turn-off of work circuit, play the effect of protection.

The power supply battery is electrically connected to the control unit 10 and the boosting unit 20, and supplies operating voltage to each unit. Further, the double-button controlled hanging neck type fan further comprises a charging interface 50 and a charging management unit 60, wherein the charging interface 50 is connected with an external power supply and used for charging a power supply battery; the charging management unit 60 is connected between the charging interface 50 and the power supply battery, and is configured to control charging of the power supply battery according to a charging level of the charging interface 50. Wherein, the interface 50 that charges can select to use Micro USB interface, USB Type C interface, Lightning interface etc..

Further, the double-key controlled hanging neck type fan further comprises a charging detection unit 70, wherein the charging detection unit 70 is connected between the charging interface 50 and the control unit 10, and is used for outputting a charging signal to the control unit 10 according to the charging level of the charging interface 50.

Further, the charging management unit 60 is electrically connected to the control unit 10, and is configured to output a full electric signal to the control unit 10; the control unit 10 is also used to detect the operating voltage of the power supply battery; the dual-key controlled hanging neck type fan further comprises a state indicating unit 80, the state indicating unit 80 is connected with the control unit 10, and the state indicating unit 80 is used for displaying a full power state according to a full electric signal output by the charging management unit 60, displaying a charging state according to a charging signal output by the charging detection unit 70, and displaying a low power state according to the working voltage of a power supply battery. It will be appreciated that the representation of each state may be defined by the control unit 10.

Further, the double-button controlled hanging neck type fan further comprises a battery protection unit 90, the battery protection unit 90 is electrically connected with the power supply battery and used for detecting the parameter value of the power supply battery, when the parameter value of the power supply battery exceeds the rated value, the battery protection unit 90 cuts off the connection between the power supply battery and a load, the work of the power supply battery is stopped, and the function of protecting the power supply battery is achieved. Alternatively, when the voltage of the detection power supply battery is lower than the over-discharge detection voltage, the battery protection unit 90 cuts off the connection of the power supply battery to the load, and stops discharging to prevent the over-discharge voltage from occurring.

In the present invention, the control unit 10 includes a plurality of terminals for being electrically connected to each unit, specifically, the control unit 10 is electrically connected to the status indication unit 80 through a terminal for outputting the full charge display signal, the charge display signal, and the low power display information corresponding to the full charge status, the charge status, and the low power status; is electrically connected with the enable control unit 40 through a terminal and is used for outputting an enable signal according to the working current signal; is electrically connected with the overvoltage detection unit 30 through a terminal and is used for receiving the working current of the first driving piece 22 and the second driving piece 32; is electrically connected with the boosting unit 20 through a terminal, and is used for outputting an operation signal, specifically outputting PWM; the first button 24, the second button 34 and the charging detection unit 70 are electrically connected through a terminal and used for receiving a control signal and a charging signal; and is electrically connected to the charge management unit 60 through a terminal for receiving the full electric signal.

The following description will specifically describe the selection and connection of each functional unit by taking an embodiment as an example. In this embodiment, as shown in fig. 8, the control unit 10 includes an MCU chip U1 and a first capacitor C1, a voltage pin VDD of the MCU chip U1 is electrically connected to the positive electrode of the power supply battery, a common pin VSS is grounded, the positive electrode of the power supply battery is grounded through the first capacitor C1, one end of each of the first button 24 and the second button 34 is electrically connected to the second control pin PIO2 of the MCU chip U1, and the other end is grounded. The first key 24 and the second key 34 are point-contact keys, and the first key 24 and the second key 34 are electrically connected in parallel.

As shown in fig. 4, the boost unit 20 includes a first mos transistor Q1, a first inductor L1, a first diode D1, and a second capacitor C2, a gate of the first mos transistor Q1 is electrically connected to a fourth control pin PIO4 of the MCU chip U1, a source of the first mos transistor Q1 is grounded, a drain of the first mos transistor Q1 is electrically connected to anodes of the first driver 22 and the second driver 32 through the first diode D1, anodes of the first driver 22 and the second driver 32 are grounded through the second capacitor C2, and a cathode of the first driver 22 and the second driver 32 are grounded; the anode of the first diode D1 is electrically connected to the anode of the power supply battery via a first inductor L1. Further, the boosting unit 20 further includes a fourth resistor R4, and two ends of the fourth resistor R4 are electrically connected to the gate and the source of the first mos transistor Q1, respectively. The first driving member 22 and the second driving member 32 are driving motors, and the two driving members are electrically connected in parallel.

It can be understood that when the user presses the first button 24 or the second button 34, the MCU chip internally determines the input signal, for example, when the user continuously presses the buttons on either side, the button sends a second-gear signal to the MCU chip, the MCU chip receives the second-gear signal through its second control pin PIO2, sends a PWM corresponding to the second-gear signal to the voltage boosting unit 20 through its fourth control pin PIO4, outputs an operating voltage corresponding to the second gear to the first driving member 22 and the second driving member 32 through the voltage boosting unit 20, and drives the first driving member 22 and the second driving member 32 to operate simultaneously.

The first key 24 and the second key 34 are point-contact keys, and the corresponding relation between the pressing mode of the keys and the gear number driving and stopping driving can be set according to requirements; optionally, the first-gear drive is started and started by pressing the key once, the second-gear drive is started by pressing the key once, and the function setting of stopping the drive and the like by pressing the key for a long time is set.

As shown in fig. 8, the overvoltage detection unit 30 includes a second resistor R2 and a third resistor R3, one end of the second resistor R2 is electrically connected to the anodes of the first driver 22 and the second driver 32, the other end is electrically connected to the third control pin PIO3 of the MCU chip U1, one end of the third resistor R3 is electrically connected between the second resistor R2 and the third control pin PIO3 of the MCU chip U1, and the other end is grounded.

As shown in fig. 4, the enable control unit 40 includes a second mos transistor Q2 and a ninth resistor R9, a gate of the second mos transistor Q2 is electrically connected to the fifth control pin PIO5 of the MCU chip U1, a source of the second mos transistor Q2 is electrically connected to the gate through the ninth resistor R9, another path of the second mos transistor Q is grounded, and a drain of the second mos transistor Q is electrically connected to the cathodes of the first driver 22 and the second driver 32.

It can be understood that, when the first driving element 22 and the second driving element 32 are in the second-gear operating state, if the first driving element 22 and/or the second driving element 32 are blocked by a foreign object at this time, the working current input to the third control pin PIO3 of the MCU chip U1 by the overvoltage detection unit 30 is large, the MCU chip U1 outputs an off enable signal to the enable control unit 40 through the fifth control pin PIO5, so that the gate and the drain of the second mos transistor Q2 are turned on, and the first driving element 22 and the second driving element 32 stop rotating; when the working current received by the third control pin PIO3 of the MCU chip U1 is normal, the MCU chip U1 outputs a conduction enable signal to the enable control unit 40 through the fifth control pin PIO5 thereof, so that the drain and the source of the second mos transistor Q2 are conducted, and the first driving element 22 and the second driving element 32 rotate normally.

The utility model discloses in, through overvoltage detecting element 30, enable the setting of the control unit 40 for when the abnormal conditions appeared in first driving piece 22, second driving piece 32, the operation stop in time effectively protects the use of hanging neck formula fan.

As shown in fig. 5, the charging interface 50 selects a USB Type C interface, a second pin a4/B of the USB Type C interface is a charging level input pin, a third pin A8 is grounded through a thirteenth resistor R13, a ninth pin B8 is grounded through a fifth resistor R5, a sixth pin a6, a seventh pin a7, and an eighth pin B6 are electrically connected to each other, the first pin a1/B is electrically connected to an eleventh pin AB/4, and the second pin a4/B is electrically connected to a twelfth pin AB/1 and is grounded.

As shown in fig. 6, the charging management unit 60 includes a charging management chip U3, a tenth resistor R10, a fourth capacitor C4, a fifth capacitor C5, an eleventh resistor R11, and a twelfth resistor R12, a monitor pin PROG of the charging management chip U3 is grounded through the tenth resistor R10, a power ground pin GND is grounded, one path of a positive input pin VCC is electrically connected to the second pin a4/B of the charging interface 50, the other path is grounded through the fourth capacitor C4, one path of a battery electrical connection pin BAT is electrically connected to the positive electrode of the power supply battery, and the other path is grounded through the fifth capacitor C5; the charging state pin CHR of the charging management chip U3 is electrically connected to the sixth control pin PIO6 of the MCU chip U1 through an eleventh resistor R11 in one path, and is grounded through a twelfth resistor R12 in the other path.

It is understood that when the charging connector is inserted into the charging interface 50, the charging management chip U3 detects the input of the charging level through its positive input pin VCC and charges the power supply battery through its battery electrical connection pin BAT.

As shown in fig. 8, the charging detection unit 70 includes a sixth resistor R6 and a seventh resistor R7, one end of the sixth resistor R6 is electrically connected to the second pin a4/B of the USB Type C interface, one path of the other end is grounded through the seventh resistor R7, and the other path is electrically connected to the second control pin PIO2 of the MCU chip U1.

The state indicating unit 80 comprises a first resistor R1 and an indicator light 801, wherein one end of the first resistor R1 is electrically connected with the positive electrode of the power supply battery, and the other end of the first resistor R1 is electrically connected with a first control pin PIO1 of the MCU chip U1 through the indicator light 801.

It can be understood that, when the charging management unit 60 detects that the power supply battery is completely charged, the full-power signal is sent to the sixth control pin PIO6 of the MCU chip U1 through the charge state pin CHR thereof, and the MCU chip U1 outputs the full-power state signal through the first control pin PIO1 thereof, so that the indicator lamp 801 displays the full-power state; similarly, when the charging detection unit 70 divides the voltage through the sixth resistor R6 to input the charging signal to the second control pin PIO2 of the MCU chip U1, the MCU chip U1 outputs the charging status signal through the first control pin PIO1 thereof, so that the indicator light 801 displays the charging status; and when the voltage of the power supply battery is detected by the MCU chip U1 through the voltage pin VDD of the MCU chip U1, when the voltage of the power supply battery is lower than the low battery preset value, the MCU chip U1 outputs a low battery state signal through the first control pin PIO1 of the MCU chip U1, so that the indicator light 801 displays a low battery state.

It will be appreciated that the indicator light 801 may be used to differentiate between displaying a full charge condition, a charged condition, and a low charge condition. Optionally, in the process of charging by inserting the charging connector into the charging interface 50, if the indicator 801 is in a flashing state, the indicator 801 is in a charging state, and if the indicator 801 is in a continuously lit state, the indicator 801 is in a full power state; in the non-charging process, the indicator 801 is turned on to be in a low-power state, and a user is reminded of charging; it is to be understood that the display status of the indicator light 801 can be set according to the requirement.

As shown in fig. 7, the battery protection unit 90 includes a battery protection chip U2, a third capacitor C3, and an eighth resistor R8, wherein one path of the power input pin VDD of the battery protection chip U2 is electrically connected to the positive electrode of the power supply battery through the eighth resistor R8, the other path is electrically connected to the negative electrode of the power supply battery through the third capacitor C3, the ground pin GND is electrically connected to the negative electrode of the power supply battery, and the two load negative electrode pins VM are grounded.

It can be understood that, when the battery protection chip U2 detects that the voltage of the power supply battery is lower than the set value, the negative terminal VM of the battery protection chip U2 is grounded through the internal switch, and the power supply battery does not work, so that the power supply battery is prevented from being over-discharged, and the power supply battery is protected.

It is understood that some signaling among the units and devices can be realized by outputting high and low levels, which is common knowledge in the art and will not be described in detail herein.

The above-mentioned functional units and devices are mounted on the circuit board so as to be easily mounted in the neck hanging body 1. As shown in fig. 1 and 2, the neck hanging body 1 is U-shaped, and includes an air outlet section 11 located at two ends, the air outlet section 11 includes an installation position 111 located at the end thereof for installing fan blades and driving members, an air duct 112 communicated with the installation position 111 and extending along the length direction of the air outlet section 11, and a device accommodating groove 113 spaced from the air duct 112, and the air outlet section 11 is provided with an air outlet 114 communicated with the air duct 112.

The power supply battery comprises a first battery 23 and a second battery 33, the second fan blade 31 and the second driving piece 32 are arranged in the mounting position 111 in the air outlet section 11 on one side of the neck hanging main body 1, the second battery 33 is arranged in the device accommodating groove 113, and the second button 34 is arranged on the air outlet section 11; in the air outlet section 11 on the other side of the neck hanging main body 1, a first fan blade 21 and a first driving piece 22 are installed in an installation position 111, a first battery 23, each functional unit and a device are installed in a device accommodating groove 113, and a first key 24 is installed on the air outlet section 11; the first button 24 and the second button 34 are located on the side of the air outlet section 11 opposite to the air outlet 114, and penetrate out of the air outlet section 11, so as to be pressed by a user.

Further, the air outlet section 11 includes a first housing 11a and a second housing 11b covering the first housing 11a, and the mounting position 111, the device accommodating groove 113, and the air outlet 114 are disposed in the first housing 11a, so as to facilitate mounting and dismounting of each device.

To facilitate connection of the devices in the air outlet sections 11 on both sides, the double button controlled hanging neck fan further comprises a first connector J1 and a second connector J2. Optionally, the connector is a six-terminal connector. Specifically, as shown in fig. 9, both ends of the first button 24, the positive and negative poles of the first driving member 22, and the positive and negative poles of the first battery 23 are electrically connected to the terminals of the first connector J1, respectively; as shown in fig. 10, both ends of the second button 34, the positive and negative poles of the second driving member 32, and the positive and negative poles of the second battery 33 are electrically connected to the terminals of the second connector J2, respectively; the first connector J1 and the second connector J2 are respectively installed in the device accommodating groove 113 on the corresponding side, and the first connector J1 and the second connector J2 on the two sides are correspondingly electrically connected through a flat cable, so that the first key 24 and the second key 34, the first driving piece 22 and the second driving piece 32, and the first battery 23 and the second battery 33 are electrically connected in parallel.

Further, as shown in fig. 2, the charging interface 50 and the indicator 801 are disposed to penetrate out of the air outlet section 11, and the charging interface 50 and the indicator 801 are disposed adjacent to the first button 24.

The utility model discloses in, when the user will hang neck main part 1 and dress when neck department uses, one side that is equipped with air outlet 114 up, one side that is equipped with the button down, user's accessible hangs an arbitrary button on 1 both sides of neck main part and can control the mode of operation of flabellum on both sides simultaneously, and the user operation of being convenient for effectively improves user's experience and feels.

It is to be understood that the foregoing examples merely represent preferred embodiments of the present invention, and that the description thereof is more specific and detailed, but not intended to limit the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims

1. The utility model provides a hang neck formula fan of double key control which characterized in that includes:

a neck hanging main body (1) worn on the neck of a user;

the fan assembly comprises a first fan blade (21) positioned on one side of the neck hanging main body (1) and a first driving piece (22) in driving connection with the first fan blade (21); the second fan blade (31) is positioned on the other side of the neck hanging main body (1), and the second driving piece (32) is in driving connection with the second fan blade (31);

the control assembly comprises a first key (24) and a second key (34) which are respectively positioned on two sides of the neck hanging main body (1);

the control unit (10), the first key (24) and the second key (34) are electrically connected with the control unit (10) so as to send control signals to the control unit (10); the first driving piece (22) and the second driving piece (32) are electrically connected with the control unit (10) so as to receive operation signals which are sent by the control unit (10) and correspond to the control signals, and the operation signals are operated simultaneously; and

a power supply battery electrically connected with the control unit (10).

2. The dual key controlled muffler fan according to claim 1, wherein the operation signal includes PWM, and the dual key controlled muffler fan further includes a boosting unit (20) outputting an operation voltage according to the PWM;

the boosting unit (20) comprises a first mos tube Q1, a first inductor L1, a first diode D1 and a second capacitor C2, the grid of the first mos tube Q1 is electrically connected with the control unit (10), the source electrode is grounded, the drain electrode is connected with the positive electrode of the first driving piece (22) and the second driving piece (32) through a first diode D1, the positive electrode of the first driving piece (22) and the second driving piece (32) is grounded through a second capacitor C2, the negative electrode is grounded, and the positive electrode of the first diode D1 is electrically connected with the positive electrode of the power supply battery through the first inductor L1.

3. The double push button controlled muffler fan according to claim 1, further comprising an overvoltage detection unit (30) for outputting an operating current of the first driving member (22) and the second driving member (32), and an enable control unit (40) for receiving an enable signal sent by the control unit (10) according to the operating current to turn on or off an operating circuit of the first driving member (22) and the second driving member (32);

the overvoltage detection unit (30) comprises a second resistor R2 and a third resistor R3, one end of the second resistor R2 is electrically connected with the positive electrodes of the first driving piece (22) and the second driving piece (32), the other end of the second resistor R3526 is electrically connected with the control unit (10), one end of the third resistor R3 is electrically connected between the second resistor R2 and the control unit (10), and the other end of the third resistor R3 is grounded;

the enabling control unit (40) comprises a second mos tube Q2 and a ninth resistor R9, the grid electrode of the second mos tube Q2 is electrically connected with the control unit (10), one path of the source electrode is electrically connected with the grid electrode through the ninth resistor R9, the other path of the source electrode is grounded, and the drain electrode is electrically connected with the negative electrodes of the first driving piece (22) and the second driving piece (32).

4. The dual key controlled muffler fan according to claim 1, further comprising a charging interface (50), a charging management unit (60) for controlling charging of the power supply battery according to a charging level inputted to the charging interface (50);

the charging management unit (60) comprises a charging management chip U3, a tenth resistor R10, a fourth capacitor C4 and a fifth capacitor C5, a monitoring pin PROG of the charging management chip U3 is grounded through the tenth resistor R10, a power ground pin GND is grounded, one path of a positive input pin VCC is electrically connected with a charging level input pin of the charging interface (50), the other path of the positive input pin is grounded through the fourth capacitor C4, one path of a battery electrical connection pin BAT is electrically connected with the anode of the power supply battery, and the other path of the battery electrical connection pin BAT is grounded through the fifth capacitor C5.

5. The dual button controlled muffler fan as defined in claim 4, further comprising

The charging management unit comprises a charging detection unit (70) for outputting a charging signal according to a charging level input into the charging interface (50), and a state indication unit (80) for displaying a full-charge state according to a full-charge signal output by the charging management unit (60), displaying a charging state according to the charging signal, and displaying a low-power state according to the working voltage of the power supply battery;

the charging detection unit (70) comprises a sixth resistor R6 and a seventh resistor R7, one end of the sixth resistor R6 is electrically connected with a charging level input pin of the charging interface (50), one path of the other end of the sixth resistor R3526 is grounded through the seventh resistor R7, and the other path of the sixth resistor R3526 is electrically connected with the control unit (10);

the charging state pin CHR of the charging management chip U3 is electrically connected with the control unit (10) through an eleventh resistor R11 in one path, and is grounded through a twelfth resistor R12 in the other path;

the state indicating unit (80) comprises a first resistor R1 and an indicator light (801), wherein one end of the first resistor is electrically connected with the anode of the power supply battery, and the other end of the first resistor is electrically connected with the control unit (10) through the indicator light (801).

6. The double push-button controlled hanging neck fan as claimed in claim 1, further comprising a battery protection unit (90), wherein the battery protection unit (90) comprises a battery protection chip U2, a third capacitor C3 and an eighth resistor R8, the power input pin VDD of the battery protection chip U2 is electrically connected to the positive electrode of the power supply battery through the eighth resistor R8 in one path, the other path is electrically connected to the negative electrode of the power supply battery through the third capacitor C3 in the other path, the ground pin GND is electrically connected to the negative electrode of the power supply battery, and the two load negative electrode pins VM are grounded.

7. The dual push-button controlled neck hanging fan as claimed in any one of claims 1-6, wherein the control unit (10) comprises an MCU chip U1, a first capacitor C1, a voltage pin VDD of the MCU chip U1 is electrically connected with a positive electrode of the power supply battery, a common pin VSS is grounded, and the positive electrode of the power supply battery is grounded through the first capacitor C1;

8. The double-button controlled hanging neck type fan according to claim 1, wherein the hanging neck main body (1) is U-shaped and comprises air outlet sections (11) at two ends, the air outlet sections (11) comprise mounting positions (111) at the ends for mounting fan blades and driving members, air channels (112) communicated with the mounting positions (111) and extending along the length direction of the air outlet sections (11), and device accommodating grooves (113) arranged at intervals from the air channels (112), and air outlets (114) communicated with the air channels (112) are formed in the air outlet sections (11).

9. The double-button controlled hanging neck fan as claimed in claim 8, wherein the power supply battery comprises a first battery (23) and a second battery (33), the first battery (23), the first fan blade (21), the first driving member (22), the first button (24) and the control unit (10) are correspondingly installed in the air outlet section (11) on one side, the second battery (33), the second fan blade (31), the second driving member (32) and the second button (34) are correspondingly installed in the air outlet section (11) on the other side, and the first button (24) and the second button (34) are located on one side of the air outlet section (11) opposite to the air outlet (114) and penetrate out of the air outlet section (11).

10. The dual push button controlled muffler fan as defined in claim 9, wherein the first push button (24), the first driving member (22), the first battery (23) are electrically connected to a first connector J1 through terminals thereof, the second push button (34), the second driving member (32), the second battery (33) are electrically connected to a second connector J2 through terminals thereof, and the first connector J1 and the second connector J2 are correspondingly electrically connected by a flat cable; the first key (24) and the second key (34) are point contact keys.