CN219372606U - Intelligent temperature control electric blanket - Google Patents
Intelligent temperature control electric blanket Download PDFInfo
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- CN219372606U CN219372606U CN202223594549.7U CN202223594549U CN219372606U CN 219372606 U CN219372606 U CN 219372606U CN 202223594549 U CN202223594549 U CN 202223594549U CN 219372606 U CN219372606 U CN 219372606U
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- heating wire
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
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Abstract
The utility model discloses an intelligent temperature control electric blanket, which comprises an electric blanket body and a switch module, wherein an electric heating wire assembly is arranged in the electric blanket body, the switch module is used for detecting the temperature of the electric blanket body and controlling the connection or disconnection of the electric heating wire assembly and a power supply, the electric heating wire assembly comprises PTC thermistor electric heating wires, the thermistor electric heating wires are fixedly distributed in the electric blanket body and used for integrally heating the electric blanket body, the arranged PTC thermistor electric heating wires can have corresponding resistance values according to different heating values while heating, and the resistance value of the thermistor electric heating wires is detected through the switch module, so that the integral temperature of the current electric blanket body can be obtained. The auxiliary heating wire is further arranged in the electric blanket body, the NTC type auxiliary heating wire is used for assisting in temperature measurement, the PTC type thermistor heating wire is supplemented in a remembering mode while heating, and temperature detection is carried out through the auxiliary heating wire, so that the accuracy and the reliability of temperature detection are guaranteed.
Description
Technical Field
The utility model relates to the field of electric blanket, in particular to an intelligent temperature control electric blanket.
Background
The electric blanket, also called electric mattress, is a contact electric heating device, which weaves the special soft rope type electric heating element with standard insulating property into the blanket in a shape of a snake or sews into the blanket, and when the electric blanket is electrified, the electric blanket emits heat. The heating device is mainly used for increasing the temperature in the quilt when people sleep to achieve the purpose of heating. It can also be used for removing moisture and dampness of bedding. It has low power consumption, adjustable temperature, convenient use and wide application.
The electric blanket controller can realize stepless temperature regulation and automatic temperature control from the original state that only two gears of on and off are arranged and temperature cannot be regulated to the state that modern development is adopted. The automatic temperature control electric blanket can keep the electric blanket in a relatively constant range when in use, avoid scalding due to overhigh temperature and have poorer heating effect due to overlow temperature, and is suitable for different crowds, thereby meeting the requirements of the masses on safety, comfort, convenient operation and the like of the electric blanket. The temperature detection of the existing electric blanket mainly detects the temperature of a certain part of the electric blanket through a temperature sensor, so that the whole electric blanket cannot be subjected to large-range temperature measurement and control, and the temperature rise reaction of the whole electric blanket is relatively slow.
Disclosure of Invention
The technical problems to be solved by the utility model are as follows: the intelligent temperature control electric blanket is simple in structure, convenient to measure and control and capable of increasing the overall reaction temperature.
In order to solve the technical problems, the utility model is solved by the following technical scheme: the utility model provides an intelligent temperature control electric blanket, includes electric blanket body, switch module, the inside heating wire subassembly that is provided with of electric blanket body, switch module be used for controlling the switching on or off of heating wire subassembly and power, the heating wire subassembly include PTC's thermistor heating wire, thermistor heating wire fixed distribution be in the inside electric blanket body be used for the overall heating of electric blanket body.
Further, the switch module comprises a controller unit and a control circuit unit, wherein the controller unit is used for outputting a waveform control signal to drive the control circuit unit to perform intermittent operation, the control circuit unit comprises a bidirectional silicon controlled rectifier used for controlling the conduction of the thermistor heating wire, and a control electrode of the bidirectional silicon controlled rectifier is connected with the controller unit and used for receiving the waveform control signal; the controller unit is used for controlling the switch, so that the sensitivity of the switch and the reliability of temperature control can be guaranteed, and the service life is long. The stability of alternating current conduction is guaranteed through the arrangement of the bidirectional thyristor.
Further, one end of the thermistor heating wire is connected with a live wire of a power supply, the other end of the thermistor heating wire is connected with a second pin of a first bidirectional thyristor, the first pin of the first bidirectional thyristor is connected with a second pin of a second bidirectional thyristor, the first pin of the second bidirectional thyristor is connected with a zero line through a first resistor, a waveform control signal output end of the controller unit is connected with one end of the second resistor and one end of the first capacitor, the other end of the second resistor is connected with a control pole of the first bidirectional thyristor through a second resistor and a third resistor which are sequentially connected in series, the control pole of the first bidirectional thyristor is connected with a first pin of the first bidirectional thyristor through a fourth resistor, the other end of the second resistor is connected with a cathode of a first diode, an anode of the first diode is grounded, and the other end of the first capacitor is connected with a control pole of the second bidirectional thyristor through a fifth resistor, and the control pole of the second bidirectional thyristor is connected with the first pin of the second bidirectional thyristor through a sixth resistor.
Still further, the other end of thermistor heating wire still be connected with the positive pole of second diode, the negative pole of second diode is connected with the one end of seventh resistance, the other end of seventh resistance all links to each other with the one end of third electric capacity, the one end of eighth resistance, the one end of ninth resistance, the other end of eighth resistance and the other end of third electric capacity all ground connection, the other end of ninth resistance all links to each other with the first foot of first bidirectional thyristor, the one end of tenth resistance, the other end of tenth resistance is connected with the controller unit, and the other end of tenth resistance passes through fourth electric capacity ground connection.
Further, the first pin of the second bidirectional thyristor is connected with one end of an eleventh resistor, the other end of the eleventh resistor is connected with the controller unit, the other end of the eleventh resistor is also connected with one end of a fifth capacitor and the cathode of a third diode, and the other end of the fifth capacitor and the anode of the third diode are grounded.
Still further still, still include auxiliary heating wire, auxiliary heating wire's one end be connected with the other end of thermistor heating wire, auxiliary heating wire's the other end is connected with the positive pole of fourth diode, the negative pole of fifth diode all, the negative pole of fourth diode is connected with the one end of twelfth resistance, the other end of twelfth resistance is connected with the one end of fourteenth resistance, the one end of sixth electric capacity all, the other end of twelfth resistance still is connected with the controller unit, the positive pole of fifth diode is connected with the one end of thirteenth resistance, the other end of fourteenth resistance and the other end of sixth electric capacity all ground.
Still further, still be provided with the conversion module who is used for providing electric energy for the controller unit with the power link to each other, the conversion module include a zener diode, a zener diode's negative pole all link to each other with the one end of fifteenth resistance, the positive pole of sixth diode, the other end of fifteenth resistance is connected with the one end of seventh electric capacity, the other end of seventh electric capacity all links to each other with the live wire of power and the one end of eighth electric capacity, the negative pole of sixth diode and the one end of ninth electric capacity, the voltage input of controller unit all link to each other, the other end of eighth electric capacity, the other end of first zener diode, the other end of ninth electric capacity all ground.
Further, the power supply comprises a live wire and a zero wire, a fuse is arranged at the inlet end of the live wire, and a piezoresistor is arranged between the live wire and the zero wire; the advantage lies in that through the fuse that fuses that sets up can carry out overcurrent protection to the original paper of rear-mounted, the inferior sensitive resistor that sets up simultaneously can switch on the short circuit when the voltage is too high, avoids voltage shock rear components and parts to improve the reliability of protection.
Still further, a detection module is further provided, the detection module includes a seventh diode, an anode of the seventh diode is connected to a live wire of the power supply, a cathode of the seventh diode is connected to one end of a sixteenth resistor and one end of a seventeenth resistor, the other end of the sixteenth resistor is connected to the controller unit, the other end of the seventeenth resistor is connected to the controller unit, one end of an eighteenth resistor and one end of a tenth capacitor, and the other end of the eighteenth resistor and the other end of the tenth capacitor are grounded; the voltage state monitoring device has the advantages that zero-crossing detection and reference voltage detection can be realized through the arranged checking module, and therefore the voltage state is monitored.
Further, the controller unit is also connected with a display, and the display is used for displaying the temperature of the electric blanket body; the temperature of the electric blanket body can be displayed through the display, so that visual observation is convenient, and the display can be a light-emitting diode display panel.
Compared with the prior art, the utility model has the following beneficial effects: the electric blanket has the advantages that the arranged PTC thermistor electric heating wire can generate heat and has corresponding resistance values according to different heat generation values, and the resistance value of the thermistor electric heating wire is detected through the switch module, so that the overall temperature of the current electric blanket body can be obtained. Meanwhile, an auxiliary heating wire is further arranged in the electric blanket body, the NTC type auxiliary heating wire is used for assisting in temperature measurement, the PTC type thermistor heating wire is supplemented in a remembering mode while heating, temperature detection is conducted through the auxiliary heating wire, and therefore accuracy and reliability of temperature detection are guaranteed. Meanwhile, the PTC thermistor heating wires are distributed in the electric blanket body, so that the electric blanket body is heated more uniformly.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic block diagram of a circuit of the present utility model;
FIG. 2 is a schematic diagram of a control circuit unit of the present utility model;
fig. 3 is a circuit connection diagram of an auxiliary heating wire according to the present utility model;
FIG. 4 is a circuit diagram of a detection module according to the present utility model;
fig. 5 is a schematic diagram of a controller unit according to the present utility model.
Detailed Description
The present utility model is described in further detail below with reference to the accompanying drawings.
The following description is presented to enable one of ordinary skill in the art to practice the utility model. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art. The basic principles of the utility model defined in the following description may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the utility model.
It will be appreciated by those skilled in the art that in the present disclosure, the terms "longitudinal," "transverse," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. indicate orientations or positions based on the orientation or positional relationship shown in the drawings, which are merely for convenience in describing the present simplified description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus the above terms are not to be construed as limiting the present utility model.
The intelligent temperature control electric blanket as shown in the accompanying drawings 1-5 comprises an electric blanket body and a switch module, wherein an electric heating wire assembly is arranged in the electric blanket body, the switch module is used for controlling the electric heating wire assembly to be connected or disconnected with a power supply, the electric heating wire assembly comprises PTC thermistor electric heating wires, and the thermistor electric heating wires are fixedly distributed in the electric blanket body and used for integrally heating the electric blanket body. The switch module comprises a controller unit and a control circuit unit, wherein the controller unit is used for outputting a waveform control signal to drive the control circuit unit to perform intermittent operation, the control circuit unit comprises a bidirectional thyristor for controlling the conduction of the thermistor heating wire, and a control electrode of the bidirectional thyristor is connected with the controller unit and is used for receiving the waveform control signal.
Specifically, the controller unit is composed of an FT61F145-RB microprocessor chip and peripheral circuits thereof. One end of the thermistor heating wire is connected with a live wire of a power supply, the other end of the thermistor heating wire is connected with a second pin of a first bidirectional thyristor T1, a first pin of the first bidirectional thyristor T1 is connected with a second pin of a second bidirectional thyristor T2, a first pin of the second bidirectional thyristor T2 is connected with a zero line through a first resistor R1, a 10 pin of a microprocessor chip U1, namely a waveform control signal output end, is connected with one end of a second resistor R2 and one end of a first capacitor C1, the other end of the second resistor R2 is connected with a control electrode of the first bidirectional thyristor T1 through a second capacitor C2 and a third resistor C3 which are sequentially connected in series, a control electrode of the first bidirectional thyristor T1 is connected with a first pin of the first bidirectional thyristor T1 through a fourth resistor R4, the other end of the second resistor R2 is connected with a cathode of a first diode D1, the other end of the first capacitor C1 is connected with a control electrode of the second bidirectional thyristor T2 through a fifth resistor R5, and the other end of the first capacitor C1 is connected with a control electrode of the second bidirectional thyristor T2 through a sixth resistor T6. The other end of the thermistor heating wire is also connected with the anode of a second diode D2, the cathode of the second diode D2 is connected with one end of a seventh resistor R7, the other end of the seventh resistor R7 is connected with one end of a third capacitor C3, one end of an eighth resistor R8 and one end of a ninth resistor R9, the other end of the eighth resistor R8 and the other end of the third capacitor C3 are grounded, the other end of the ninth resistor R9 is connected with a first pin of a first bidirectional thyristor T1 and one end of a tenth resistor R10, the other end of the tenth resistor R10 is connected with a 2 pin of a microprocessor chip, and the other end of the tenth resistor is grounded through a fourth capacitor C4; the first pin of the second bidirectional thyristor T2 is connected with one end of an eleventh resistor R11, the other end of the eleventh resistor R11 is connected with the 4 pin of the microprocessor chip, the other end of the eleventh resistor R11 is also connected with one end of a fifth capacitor C5 and the cathode of a third diode D3, and the other end of the fifth capacitor C5 and the anode of the third diode D3 are grounded.
The electric heating wire is characterized by further comprising an auxiliary electric heating wire, one end of the auxiliary electric heating wire is connected with the other end of the thermistor electric heating wire, the other end of the auxiliary electric heating wire is connected with the anode of a fourth diode D4 and the cathode of a fifth diode D5, the cathode of the fourth diode D4 is connected with one end of a twelfth resistor R12, the other end of the twelfth resistor R12 is connected with one end of a fourteenth resistor R14 and one end of a sixth capacitor C6, the other end of the twelfth resistor R12 is further connected with the 3 pin of the microprocessor chip, the anode of the fifth diode is connected with one end of a thirteenth resistor, and the other ends of the thirteenth resistor R13, the fourteenth resistor R14 and the sixth capacitor C6 are grounded.
It should be noted that the intelligent temperature control electric blanket is further provided with a conversion module which is connected with a power supply and is used for providing electric energy for the controller unit, the conversion module comprises a first zener diode D7, the cathode of the first zener diode D7 is connected with one end of a fifteenth resistor R15 and the anode of a sixth diode, the other end of the fifteenth resistor is connected with one end of a seventh capacitor, the other end of the seventh capacitor is connected with the live wire of the power supply and one end of an eighth capacitor C8, the cathode of the sixth diode D6 is connected with one end of a ninth capacitor C9 and the voltage input end of the controller unit U1, and the other end of the eighth capacitor C8, the other end of the first zener diode D7 and the other end of the ninth capacitor C9 are grounded.
For the reliability of guarantee alternating current input and the reliability of use of guarantee intelligent accuse temperature electric blanket, the power includes live wire and zero line, is provided with the fuse F1 at the income line end of live wire, and is provided with piezoresistor VR1 between live wire and zero line, can effectively prevent the sudden rise of voltage through the hyposensitive resistor that sets up, improves the reliability.
The utility model is also provided with a detection module, the detection module comprises a seventh diode D8, the anode of the seventh diode D8 is connected with a live wire of a power supply, the cathode of the seventh diode D8 is connected with one end of a sixteenth resistor R16 and one end of a seventeenth resistor R17, the other end of the sixteenth resistor R16 is connected with a 1 pin of a microprocessor chip U1, the other end of the seventeenth resistor R17 is connected with one end of an eighteenth resistor R18 and one end of a tenth capacitor C10, the other end of the seventeenth resistor R17 is also connected with a 17 pin of the microprocessor chip, and the other end of the eighteenth resistor R18 is grounded with the other end of the tenth capacitor C10.
The working principle of the utility model is as follows: the electric energy emits heat energy when passing through the heating wire of the PTC thermistor, and the resistance value is increased in proportion with the increase of the temperature. Specifically, when the square wave electric signal output by the controller unit is split into two paths, one path controls the first bidirectional thyristor T1 to be turned on intermittently through the second resistor R2, the second capacitor C2 and the third resistor R3, and the other path drives the second bidirectional thyristor T2 to be turned on intermittently through the first capacitor C1 and the fifth resistor R5. When the first bidirectional thyristor T1 is conducted and the second bidirectional thyristor T2 is conducted, the thermistor heating wire is conducted, temperature control is conducted through the duty ratio of the control waveform output signal, the heat emitted by the control waveform output signal is higher when the duty ratio is larger and the conduction time is longer, the conduction time is reduced when the duty ratio is smaller, and the heating value is reduced, so that the conduction control and the temperature control are conducted. In the utility model, realize voltage sampling through eleventh resistance R11 and the cooperation of first resistance R1, detect the voltage at first resistance both ends promptly and with voltage signal input to the controller unit, thereby the controller converts the internal resistance value that obtains the thermistor heating wire and then obtains the temperature of thermistor heating wire under the present state, the bulk temperature of electric blanket body promptly. And the working state of the bidirectional thyristor can be transmitted to the controller unit through the tenth resistor R10, so that the first bidirectional thyristor T1 and the second bidirectional thyristor T2 are monitored.
There is also an auxiliary heating wire in the present application, the resistance of which is lower as the temperature is higher. The end voltage of the fourteenth resistor R14 is detected by the controller unit to obtain a current value flowing through the fourteenth resistor R14, the resistance value of the auxiliary heating wire is obtained according to the relation between the current and the voltage, and then the temperature of the auxiliary heating wire in the current state is obtained.
It is worth mentioning that the inspection module provided by the present utility model can realize zero-crossing detection through the cooperation of the seventh diode D8 and the sixteenth resistor R16. And by matching the seventeenth resistor R17 and the eighteenth resistor R18, the terminal voltage of the eighteenth resistor R18 can be detected to realize the detection of the reference voltage, so that the stability of the power supply is detected.
It will be appreciated by persons skilled in the art that the embodiments of the utility model described above and shown in the drawings are by way of example only and are not limiting. The objects of the present utility model have been fully and effectively achieved. The functional and structural principles of the present utility model have been shown and described in the examples and embodiments of the utility model may be modified or practiced without departing from the principles described.
Claims (10)
1. The utility model provides an intelligent temperature control electric blanket, includes the electric blanket body, the inside heating wire subassembly that is provided with of electric blanket body, its characterized in that still includes switch module, switch module be used for detecting the temperature of electric blanket body and control heating wire subassembly and switch-on or switch-off of power, the heating wire subassembly include PTC's thermistor heating wire, thermistor heating wire fixed distribution be in the inside electric blanket body be used for the overall heating of electric blanket body.
2. The intelligent temperature control electric blanket according to claim 1, wherein the switch module comprises a controller unit and a control circuit unit, the controller unit is used for outputting a waveform control signal to drive the control circuit unit to perform intermittent operation, the control circuit unit comprises a bidirectional thyristor for controlling conduction of a thermistor heating wire, and a control electrode of the bidirectional thyristor is connected with the controller unit and used for receiving the waveform control signal.
3. The intelligent temperature control electric blanket according to claim 2, wherein one end of the thermistor heating wire is connected with a live wire of a power supply, the other end of the thermistor heating wire is connected with a second pin of a first bidirectional thyristor, a first pin of the first bidirectional thyristor is connected with a second pin of a second bidirectional thyristor, the first pin of the second bidirectional thyristor is connected with a zero line through a first resistor, a waveform control signal output end of the controller unit is connected with one end of the second resistor and one end of a first capacitor, the other end of the second resistor is connected with a control electrode of the first bidirectional thyristor through a second resistor and a third resistor which are sequentially connected in series, the control electrode of the first bidirectional thyristor is connected with a first pin of the first bidirectional thyristor through a fourth resistor, the other end of the second resistor is further connected with a cathode of a first diode, the other end of the first resistor is connected with a control electrode of the second bidirectional thyristor through a fifth resistor, and the control electrode of the second bidirectional thyristor is further connected with the first diode through a sixth resistor.
4. The intelligent temperature control electric blanket according to claim 3, wherein the other end of the thermistor heating wire is further connected to an anode of a second diode, a cathode of the second diode is connected to one end of a seventh resistor, the other end of the seventh resistor is connected to one end of a third capacitor, one end of an eighth resistor and one end of a ninth resistor, the other end of the eighth resistor and the other end of the third capacitor are grounded, the other end of the ninth resistor is connected to a first pin of the first bidirectional thyristor and one end of a tenth resistor, the other end of the tenth resistor is connected to the controller unit, and the other end of the tenth resistor is grounded through a fourth capacitor.
5. The intelligent temperature control electric blanket according to claim 3, wherein the first leg of the second bidirectional thyristor is connected to one end of an eleventh resistor, the other end of the eleventh resistor is connected to the controller unit, the other end of the eleventh resistor is further connected to one end of a fifth capacitor and a cathode of a third diode, and the other end of the fifth capacitor and an anode of the third diode are grounded.
6. The intelligent temperature control electric blanket according to claim 2, further comprising an auxiliary heating wire, wherein one end of the auxiliary heating wire is connected with the other end of the thermistor heating wire, the other end of the auxiliary heating wire is connected with an anode of a fourth diode and a cathode of a fifth diode, the cathode of the fourth diode is connected with one end of a twelfth resistor, the other end of the twelfth resistor is connected with one end of a fourteenth resistor and one end of a sixth capacitor, the other end of the twelfth resistor is further connected with the controller unit, the anode of the fifth diode is connected with one end of a thirteenth resistor, and the other ends of the thirteenth resistor, the fourteenth resistor and the sixth capacitor are grounded.
7. The intelligent temperature control electric blanket according to claim 2, further comprising a conversion module connected with the power supply and used for providing electric energy for the controller unit, wherein the conversion module comprises a first zener diode, the cathode of the first zener diode is connected with one end of a fifteenth resistor and the anode of a sixth diode, the other end of the fifteenth resistor is connected with one end of a seventh capacitor, the other end of the seventh capacitor is connected with the live wire of the power supply and one end of an eighth capacitor, the cathode of the sixth diode is connected with one end of a ninth capacitor and the voltage input end of the controller unit, and the other end of the eighth capacitor, the other end of the first zener diode and the other end of the ninth capacitor are grounded.
8. The intelligent temperature control electric blanket according to claim 1, wherein the power supply comprises a live wire and a zero wire, a fuse is provided at an inlet end of the live wire, and a piezoresistor is provided between the live wire and the zero wire.
9. The intelligent temperature control electric blanket according to claim 2, further comprising a detection module, wherein the detection module comprises a seventh diode, an anode of the seventh diode is connected with a live wire of the power supply, a cathode of the seventh diode is connected with one end of a sixteenth resistor and one end of a seventeenth resistor, the other end of the sixteenth resistor is connected with the controller unit, the other end of the seventeenth resistor is connected with the controller unit, one end of an eighteenth resistor and one end of a tenth capacitor, and the other end of the eighteenth resistor is grounded with the other end of the tenth capacitor.
10. The intelligent temperature control electric blanket according to claim 2, wherein the controller unit is further connected with a display, and the display is used for displaying the temperature of the electric blanket body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223594549.7U CN219372606U (en) | 2022-12-30 | 2022-12-30 | Intelligent temperature control electric blanket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223594549.7U CN219372606U (en) | 2022-12-30 | 2022-12-30 | Intelligent temperature control electric blanket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219372606U true CN219372606U (en) | 2023-07-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223594549.7U Active CN219372606U (en) | 2022-12-30 | 2022-12-30 | Intelligent temperature control electric blanket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219372606U (en) |
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2022
- 2022-12-30 CN CN202223594549.7U patent/CN219372606U/en active Active
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