Intelligent lumbar fixator

Abstract

The present application relates to the technical field of medical devices, and discloses an intelligent waist fixator to solve the problem that the existing waist fixator does not have a dedicated heat dissipation device, which is closely attached to the human waist, and the air circulation between the waist skin and the fixator is poor when the fixator is worn for a long time, so that heat and sweat are easily accumulated, causing the user to feel hot and humid, especially in a high-temperature environment or in a sports state, and the discomfort is more obvious, which affects the wearing experience and use effect. The intelligent waist fixator comprises a waist fixator body and a heat dissipation module, the heat dissipation module is embedded in the waist fixator body, and the heat dissipation module comprises a lithium battery Source_Li_1, a lithium battery Source_Li_2, a control circuit and a heat dissipation fan. The control circuit is connected with the lithium battery Source_Li_1 and the lithium battery Source_Li_2, and the motor in the heat dissipation fan is connected with the control circuit.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to an intelligent lumbar fixation device. Background Technology

[0002] A lumbar fixation device is an assistive device that applies appropriate binding force to the lumbar region to support the lumbar muscles and maintain lumbar spine stability. It is commonly used for lumbar injury rehabilitation, occupational protection, or sports protection.

[0003] However, most existing lumbar support devices only provide fixation and support and lack dedicated heat dissipation devices. Because they fit tightly against the waist, prolonged wear can lead to poor air circulation between the skin and the support, causing heat and sweat to accumulate and resulting in discomfort such as stuffiness and dampness. This discomfort is especially pronounced in high-temperature environments or during exercise, affecting the wearing experience and effectiveness. Summary of the Invention

[0004] This invention addresses the problem that existing lumbar support devices lack dedicated heat dissipation devices. Due to their close fit to the waist, prolonged wear leads to poor air circulation between the skin and the support, causing heat and sweat buildup, resulting in discomfort such as stuffiness and dampness, especially in high-temperature environments or during exercise. This discomfort negatively impacts the wearing experience and usability. The invention provides an intelligent lumbar support device.

[0005] The technical solution adopted in this invention is:

[0006] A smart lumbar support device includes a lumbar support body and a heat dissipation module. The lumbar support body has multiple ventilation holes, and the heat dissipation module is embedded inside the lumbar support body. The heat dissipation module includes: lithium battery Source_Li_1, lithium battery Source_Li_2, control circuit, and cooling fan.

[0007] The lithium battery Source_Li_2 is a backup battery;

[0008] The control circuit is connected to lithium batteries Source_Li_1 and Source_Li_2. The control circuit can be powered by either lithium battery Source_Li_1 or lithium battery Source_Li_2.

[0009] The motor M inside the cooling fan is connected to the control circuit. The control circuit outputs different frequencies to control the speed of the motor M inside the cooling fan, thereby controlling the airflow of the cooling fan.

[0010] Furthermore, the motor M inside the cooling fan is a miniature AC motor.

[0011] Furthermore, the internal control circuit of the heat dissipation module includes: a controller IC, a selection sub-circuit, a signal generation sub-circuit SG, and a motor drive sub-circuit.

[0012] Furthermore, the controller IC is an STM32 microcontroller;

[0013] The selection sub-circuit is connected to the lithium battery Source_Li_1, the lithium battery Source_Li_2 and the controller IC. The selection sub-circuit receives the signal from the controller IC to select whether to use the lithium battery Source_Li_1 or the lithium battery Source_Li_2 for power supply.

[0014] The signal generation sub-circuit SG is connected to the selection sub-circuit, which supplies power to the signal generation sub-circuit SG. The output terminal O1 of the signal generation sub-circuit SG outputs a +12V DC voltage, and the output terminal O2 of the signal generation sub-circuit SG outputs a -12V DC voltage. The signal generation sub-circuit SG can be implemented using existing technology, such as using a filter to filter and remove impurities from the +12V signal entering the signal generation sub-circuit SG, and then outputting the filtered +12V DC voltage from the output terminal O1 of the signal generation sub-circuit SG. The +12V signal entering the signal generation sub-circuit SG passes through an inverting proportional amplifier circuit composed of operational amplifiers, with the amplification factor set to -1, and then outputting the filtered -12V DC voltage from the output terminal O2 of the signal generation sub-circuit SG.

[0015] The motor drive sub-circuit is connected to the signal generation sub-circuit SG and the motor M inside the cooling fan. The signal generation sub-circuit SG supplies power to the motor drive sub-circuit, which outputs AC voltages of different frequencies to control the speed of the motor M inside the cooling fan. Since the motor M inside the cooling fan is an AC motor, its speed is related to the frequency of the AC voltage.

[0016] Furthermore, the selection sub-circuit includes: a selection switch SW, a digital-to-analog converter DAC, an operational amplifier AMP1, a current-limiting resistor R7, and a light-emitting diode LED.

[0017] The selector switch SW switches between lithium battery Source_Li_1 and lithium battery Source_Li_2. The selector switch SW is connected to the signal generation sub-circuit SG.

[0018] The digital-to-analog converter (DAC) is connected to the controller IC;

[0019] The inverting input of operational amplifier AMP1 is connected to the lithium battery Source_Li_1, and the non-inverting input of operational amplifier AMP1 is connected to the digital-to-analog converter DAC; the controller IC inputs the minimum allowable voltage to the non-inverting input of operational amplifier AMP1 through the digital-to-analog converter DAC.

[0020] The anode of the LED is connected to the output of the operational amplifier AMP1, and the cathode of the LED is grounded through the current-limiting resistor R7.

[0021] Furthermore, the motor drive sub-circuit includes:

[0022] Operational amplifier AMP2 has its inverting input connected to the output O1 of the signal generator circuit SG via resistor R1, and its non-inverting input grounded via resistor R2. The output of operational amplifier AMP2 is connected to the inverting input of operational amplifier AMP2 via a parallel capacitor C1 and a PMOS transistor to form a feedback branch.

[0023] Operational amplifier AMP3 has its inverting input connected to the output of operational amplifier AMP2 via resistor R3. Its non-inverting input is connected to the output O2 of the signal generator circuit SG via a variable resistor RV. The non-inverting input is also grounded via resistor R4. The output of operational amplifier AMP3 is connected to the gate of the PMOS transistor via resistors R6 and R5. The junction of resistors R6 and R5 is grounded via capacitor C3, which filters out high-frequency harmonics at this junction. The variable resistor RV is connected to the controller IC, which adjusts the resistance value of RV.

[0024] Furthermore, the variable resistor RV is selected using the AD5272 chip because the AD5272 chip can be controlled by the STM32.

[0025] Furthermore, the output terminal O1 of the signal generation sub-circuit SG is grounded through the Zener diode Z1.

[0026] Furthermore, the output terminal O2 of the signal generation sub-circuit SG is grounded through the Zener diode Z2.

[0027] Furthermore, a resistor R8 is connected in series between capacitor C3 and the connection point of motor M inside the cooling fan, and capacitor C3 and resistor R8 form a first-order low-pass filter.

[0028] Furthermore, resistor R9 is connected in series between resistor R8 and the motor M inside the cooling fan. The connection point between resistor R9 and the motor M inside the cooling fan is grounded through capacitor C4. Capacitor C3, resistor R8, capacitor C4, and resistor R9 form a second-order low-pass filter to achieve better DC blocking and AC passing effects.

[0029] The beneficial effects of this invention are:

[0030] This invention discloses an intelligent lumbar support device that overcomes the shortcomings of existing lumbar support devices by incorporating a built-in heat dissipation module. The cooling fan accelerates airflow, preventing stuffiness and dampness during wear and improving comfort. It utilizes dual power supplies—lithium batteries Source_Li_1 and Source_Li_2—with a control circuit that can flexibly switch between power sources to ensure continuous and stable operation of the heat dissipation function. Simultaneously, the control circuit can adjust the frequency of the output voltage to change the fan speed, achieving adjustable airflow to meet different heat dissipation needs, balancing energy saving and personalized experience. Solar power further saves energy, extends battery life, and enhances ease of use. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a circuit diagram of the heat dissipation module for an intelligent lumbar support device. Detailed Implementation

[0033] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0034] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, these are merely examples and are not intended to limit the present invention.

[0035] The embodiments of the invention will now be described in detail with reference to the accompanying drawings.

[0036] The intelligent lumbar support device disclosed in this embodiment includes a lumbar support body and a heat dissipation module. The lumbar support body has multiple ventilation holes, and the heat dissipation module is embedded inside the lumbar support body. (See attached diagram) Figure 1As shown, the heat dissipation module includes: lithium battery Source_Li_1, lithium battery Source_Li_2, control circuit 1, and cooling fan.

[0037] The lithium battery Source_Li_2 is a backup battery;

[0038] In this embodiment, both lithium battery Source_Li_1 and lithium battery Source_Li_2 generate a voltage of 12V.

[0039] Control circuit 1 is connected to lithium battery Source_Li_1 and lithium battery Source_Li_2. Control circuit 1 can be powered by lithium battery Source_Li_1 or lithium battery Source_Li_2.

[0040] The motor M inside the cooling fan is connected to the control circuit 1. The control circuit 1 outputs different frequencies to control the speed of the motor M inside the cooling fan, thereby controlling the airflow of the cooling fan.

[0041] The beneficial effects of the above technical solution are as follows: By incorporating a built-in heat dissipation module, the deficiency of existing lumbar support devices lacking heat dissipation function is resolved. The cooling fan accelerates air circulation, preventing stuffiness and dampness during wear and improving comfort. Dual power supply from lithium batteries Source_Li_1 and Source_Li_2 is used, and control circuit 1 can flexibly switch power sources to ensure continuous and stable operation of the heat dissipation function. Simultaneously, control circuit 1 can adjust the frequency of the output voltage to change the fan speed, achieving wind speed adjustment to meet different heat dissipation needs, balancing energy saving and personalized experience. Solar power supply further saves energy, extends battery life, and improves ease of use.

[0042] Furthermore, the motor M inside the cooling fan is a miniature AC motor. In this embodiment, the miniature AC motor selected is a miniature AC motor from Shenzhen Boyang Intelligent Equipment Co., Ltd.

[0043] Furthermore, the internal control circuit 1 of the heat dissipation module includes: a controller IC, a selection sub-circuit 11, a signal generation sub-circuit SG, and a motor drive sub-circuit 12.

[0044] In this embodiment, the controller IC is an STM32 microcontroller;

[0045] The selection sub-circuit 11 is connected to the lithium battery Source_Li_1, the lithium battery Source_Li_2 and the controller IC. The selection sub-circuit 11 receives the signal from the controller IC to select whether to be powered by the lithium battery Source_Li_1 or the lithium battery Source_Li_2.

[0046] The signal generation sub-circuit SG is connected to the selection sub-circuit 11, which supplies power to the signal generation sub-circuit SG. The output terminal O1 of the signal generation sub-circuit SG outputs a +12V DC voltage, and the output terminal O2 of the signal generation sub-circuit SG outputs a -12V DC voltage. The signal generation sub-circuit SG can be implemented using existing technology, such as using a filter to filter and remove noise from the +12V signal entering the signal generation sub-circuit SG, and outputting the removed +12V DC voltage from the output terminal O1 of the signal generation sub-circuit SG. The +12V signal entering the signal generation sub-circuit SG passes through an inverting proportional amplifier circuit composed of operational amplifiers, with the amplification factor set to -1, and outputting the removed -12V DC voltage from the output terminal O2 of the signal generation sub-circuit SG.

[0047] The motor drive sub-circuit 12 is connected to the signal generation sub-circuit SG and the motor M inside the cooling fan. The signal generation sub-circuit SG supplies power to the motor drive sub-circuit 12. The motor drive sub-circuit 12 outputs AC voltages of different frequencies to control the speed of the motor M inside the cooling fan. Since the motor M inside the cooling fan is an AC motor, its speed is related to the frequency of the AC voltage.

[0048] Furthermore, the selection sub-circuit 11 includes: a selection switch SW, a digital-to-analog converter DAC, an operational amplifier AMP1, a current-limiting resistor R7, and a light-emitting diode LED.

[0049] The selector switch SW switches between lithium battery Source_Li_1 and lithium battery Source_Li_2. The selector switch SW is connected to the signal generation sub-circuit SG.

[0050] The digital-to-analog converter (DAC) is connected to the controller IC;

[0051] The inverting input of operational amplifier AMP1 is connected to the lithium battery Source_Li_1, and the non-inverting input of operational amplifier AMP1 is connected to the digital-to-analog converter DAC; the controller IC inputs the minimum allowable voltage to the non-inverting input of operational amplifier AMP1 through the digital-to-analog converter DAC.

[0052] The anode of the LED is connected to the output of the operational amplifier AMP1, and the cathode of the LED is grounded through the current-limiting resistor R7.

[0053] The working principle of this selector circuit 11 is as follows:

[0054] When the lithium battery Source_Li_1 is fully charged, it can generate a sufficient (+12V) voltage. At this time, the selector switch SW is in the Source_Li_1 position, and the voltage generated by Source_Li_1 enters the signal generation sub-circuit SG. When the lithium battery Source_Li_1 is insufficiently charged, it generates a voltage lower than its rated value even when fully charged. If the generated voltage is lower than the minimum allowable voltage, the selector switch SW needs to be switched to the Source_Li_2 (backup battery) position. Operational amplifier AMP1 acts as a comparator here (because there is no feedback branch). When the voltage generated by the lithium battery Source_Li_1 is lower than the minimum allowable voltage (in this embodiment, the minimum allowable voltage is 11V), operational amplifier AMP1 outputs a high level, and the LED is lit, reminding the user to switch the selector switch SW to the Source_Li_2 position. When the voltage generated by the lithium battery Source_Li_1 is higher than the minimum allowable voltage, operational amplifier AMP1 outputs a low level, and the LED is turned off.

[0055] Furthermore, the motor drive sub-circuit 12 includes:

[0056] Operational amplifier AMP2 has its inverting input connected to the output O1 of the signal generator circuit SG via resistor R1, and its non-inverting input grounded via resistor R2. The output of operational amplifier AMP2 is connected to the inverting input of operational amplifier AMP2 via a parallel capacitor C1 and a PMOS transistor to form a feedback branch.

[0057] Operational amplifier AMP3 has its inverting input connected to the output of operational amplifier AMP2 via resistor R3. Its non-inverting input is connected to the output O2 of the signal generator circuit SG via a variable resistor RV. The non-inverting input is also grounded via resistor R4. The output of operational amplifier AMP3 is connected to the gate of the PMOS transistor via resistors R6 and R5. The junction of resistors R6 and R5 is grounded via capacitor C3, which filters out high-frequency harmonics at this junction. The variable resistor RV is connected to the controller IC, which adjusts the resistance value of RV.

[0058] Furthermore, the variable resistor RV is selected using the AD5272 chip because the AD5272 chip can be controlled by the STM32.

[0059] Furthermore, the output terminal O1 of the signal generation sub-circuit SG is grounded through the Zener diode Z1.

[0060] Furthermore, the output terminal O2 of the signal generation sub-circuit SG is grounded through the Zener diode Z2.

[0061] Furthermore, a resistor R8 is connected in series between capacitor C3 and the connection point of motor M inside the cooling fan, and capacitor C3 and resistor R8 form a first-order low-pass filter.

[0062] Furthermore, resistor R9 is connected in series between resistor R8 and the motor M inside the cooling fan. The connection point between resistor R9 and the motor M inside the cooling fan is grounded through capacitor C4. Capacitor C3, resistor R8, capacitor C4, and resistor R9 form a second-order low-pass filter to achieve better DC blocking and AC passing effects.

[0063] The working principle of this motor drive sub-circuit 12 is as follows:

[0064] Operational amplifier AMP2, capacitor C1, resistors R1 and R2 form an integrator, while operational amplifier AMP3 acts as a comparator (because there is no feedback branch). When the voltage uo at the junction of resistors R6 and R5 is high (UoH), the PMOS transistor is off; when uo is low (UoL), the PMOS transistor is on. When the motor drive sub-circuit 12 is connected to the signal generation sub-circuit, since the voltage across capacitor C1 is zero (i.e., the output voltage uo1 of operational amplifier AMP2 = 0), uo = UoH, the PMOS transistor is off, the integrator integrates u, and uo1 gradually decreases. Once uo1 exceeds the reference voltage -UREF, uo will jump from UoH to UoL, causing the PMOS transistor to close, and capacitor C1 to discharge rapidly to zero (uoi = 0), thus uo jumps from UoL to Uon. The PMOS transistor then opens again, repeating the above process, generating self-oscillation in the circuit. uo passes through a second-order low-pass filter composed of capacitor C3, resistor R8, capacitor C4, and resistor R9, becoming an AC voltage that enters the motor M inside the cooling fan.

[0065] From the waveform, uo1 is a triangular DC signal with a value less than zero (because the operational amplifier AMP2, capacitor C1, resistor R1 and resistor R2 form an integrator), uo is a square AC signal with zero DC component (because the operational amplifier AMP3 acts as a comparator here), and the voltage of the motor M entering the cooling fan is an AC signal with zero DC component that is almost a sine wave.

[0066] The controller adjusts the variable resistor RV to regulate the reference voltage -UREF, thereby adjusting the frequency of uo, and ultimately regulating the voltage frequency of the motor M entering the cooling fan. The controller is connected to a control panel, allowing users to adjust the resistance of the variable resistor RV (e.g., using an AD5272 chip).

Claims

1. A smart lumbar support device, characterized in that, The device includes a lumbar support frame and a heat dissipation module. The lumbar support frame has multiple ventilation holes, and the heat dissipation module is embedded inside the lumbar support frame. The heat dissipation module includes: Solar cell Source_Sun; Lithium battery Source_Li_1; Lithium battery Source_Li_2 is a backup battery; The control circuit is connected to lithium batteries Source_Li_1 and Source_Li_2. The control circuit can be powered by either lithium battery Source_Li_1 or lithium battery Source_Li_2. The cooling fan has an internal motor M connected to a control circuit. The control circuit outputs different frequencies to control the speed of the internal motor M, thereby controlling the airflow of the cooling fan. The motor M inside the cooling fan is a miniature AC motor; The internal control circuit of the heat dissipation module includes: Controller IC; The selection sub-circuit is connected to the lithium battery Source_Li_1, the lithium battery Source_Li_2 and the controller IC. The selection sub-circuit receives the signal from the controller IC to select whether to use the lithium battery Source_Li_1 or the lithium battery Source_Li_2 for power supply. The signal generation sub-circuit SG is connected to the selection sub-circuit. The selection sub-circuit supplies power to the signal generation sub-circuit SG. The output terminal O1 of the signal generation sub-circuit SG outputs a +12V DC voltage, and the output terminal O2 of the signal generation sub-circuit SG outputs a -12V DC voltage. The motor drive sub-circuit is connected to the signal generation sub-circuit SG and the motor M inside the cooling fan. The signal generation sub-circuit SG supplies power to the motor drive sub-circuit, and the motor drive sub-circuit outputs AC voltages of different frequencies to control the speed of the motor M inside the cooling fan. The selector sub-circuit includes: Selector switch SW switches between lithium battery Source_Li_1 and lithium battery Source_Li_2. Selector switch SW is connected to signal generation sub-circuit SG. The digital-to-analog converter (DAC) is connected to the controller IC. Operational amplifier AMP1 has its inverting input connected to the lithium battery Source_Li_1 and its non-inverting input connected to the digital-to-analog converter DAC. The controller IC inputs the minimum allowable voltage to the non-inverting input of operational amplifier AMP1 through the digital-to-analog converter DAC. Current-limiting resistor R7; The light-emitting diode (LED) has its anode connected to the output of the operational amplifier AMP1, and its cathode grounded through the current-limiting resistor R7. The motor drive sub-circuit includes: Operational amplifier AMP2 has its inverting input connected to the output O1 of the signal generator circuit SG via resistor R1, and its non-inverting input grounded via resistor R2. The output of operational amplifier AMP2 is connected to the inverting input of operational amplifier AMP2 via a parallel capacitor C1 and a PMOS transistor to form a feedback branch. Operational amplifier AMP3 has its inverting input connected to the output of operational amplifier AMP2 via resistor R3. Its non-inverting input is connected to the output O2 of the signal generator circuit SG via a variable resistor RV. The non-inverting input is also grounded via resistor R4. The output of operational amplifier AMP3 is connected to the gate of the PMOS transistor via resistors R6 and R5. The junction of resistors R6 and R5 is grounded via capacitor C3, which filters out high-frequency harmonics at this junction. The variable resistor RV is connected to the controller IC, which adjusts the resistance value of RV.

2. The intelligent lumbar support device according to claim 1, characterized in that, The variable resistor RV uses the AD5272 chip.

3. The intelligent lumbar support device according to any one of claims 1-2, characterized in that, The output terminal O1 of the signal generation sub-circuit SG is grounded through the Zener diode Z1.

4. The intelligent lumbar support device according to any one of claims 1-2, characterized in that, The output terminal O2 of the signal generation sub-circuit SG is grounded through the Zener diode Z2.

5. The intelligent lumbar support device according to any one of claims 1-2, characterized in that, A resistor R8 is connected in series between capacitor C3 and the connection point of motor M inside the cooling fan.

6. The intelligent lumbar support device according to claim 5, characterized in that, A resistor R9 is connected in series between resistor R8 and motor M inside the cooling fan. The connection point between resistor R9 and motor M inside the cooling fan is grounded through capacitor C4.

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