CN221409164U - Car light brightness adjusting circuit, car light module and car - Google Patents
Car light brightness adjusting circuit, car light module and car Download PDFInfo
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Abstract
The utility model provides a car light brightness adjusting circuit, comprising: the vehicle lamp comprises a first vehicle lamp brightness modulation module, a first thermistor and a control module; wherein the first vehicle lamp modulation module comprises: the LED driving device comprises a two-stage RC circuit module, an LED lamp and an LED driving module; wherein the first end of the first thermistor is grounded; the input end of the control module is connected with the second end of the first thermistor, and the input end of the control module is used for inputting a first input voltage; the first end of the two-stage RC circuit module is correspondingly connected with the first output end of the control module; the second end of the two-stage RC circuit is correspondingly connected with the first end of the LED driving circuit module; a D driving circuit module; the second ends of the LED driving circuit modules are respectively connected with the first ends of the LED lamps; a plurality of LED lamps; the second ends of the LED lamps are sequentially connected with each other and grounded; according to the technical scheme, the problems that flicker can be avoided in the brightness adjustment process and the circuit complexity and the production cost are reduced when the brightness of the LED lamp is adjusted are solved.
Description
Technical Field
The utility model belongs to the field of LED car lamp control, and particularly relates to a car lamp brightness adjusting circuit, a car lamp module and a car.
Background
The car lamp is a high-power device, a large amount of heat is often generated during the working process, on one hand, in order to protect the reliability and the service life of a product, the power of the car lamp needs to be adjusted in real time according to different temperatures, so that the lamp ensures the illumination of the car and meanwhile ensures that the components are not damaged due to overhigh temperature; on the other hand, the car lamp needs to meet certain production regulation requirements, and under the condition of adopting different LED light sources, the illumination intensity of the external output is ensured to be consistent, and the current of the external output needs to be adjusted according to different LEDs so as to meet the requirement of keeping the illumination intensity of the external output consistent. Therefore, the lamp brightness adjusting circuit of the lamp usually adjusts power according to temperature, and meanwhile, different LEDs are adopted to control the maximum power output by the lamp according to the production of the lamp. The current common method is that the power of the temperature-adjusting car lamp is realized through a single NTC first thermistor, the adaptation of different LED powers is realized through selecting different resistors to divide the voltage to obtain different ratios (the resistor is called BIN resistor), and the software is used for identifying to control the maximum current output, so that the power control of the whole lamp is realized. The existing method is that an NTC resistor and a BIN resistor are respectively collected through an MCU, the MCU obtains the NTC resistor and the BIN resistor and then controls the duty ratio of the PWM output to achieve the purpose of controlling the power of a lamp, the lamp brightness adjusting circuit adopts a PWM digital adjusting mode to enable a certain flicker to be visible under a high-definition video instrument when the frequency is low, and compared with the method, the resistance and the circuit required by independent control of the NTC resistor and the BIN are relatively complex, and the cost is higher.
The above problems are a technical problem to be solved by those skilled in the art.
Disclosure of utility model
The utility model provides a car lamp brightness adjusting circuit, a car lamp module and a car, which solve the problems of avoiding flickering in the brightness adjusting process and reducing the complexity of the circuit and the production cost when adjusting the brightness of an LED lamp.
According to a first aspect of the present utility model, there is provided a lamp brightness adjusting circuit characterized by comprising: one or more than two first vehicle lamp brightness modulation modules, a first thermistor and a control module; wherein the first vehicle lamp modulation module comprises: the LED driving circuit comprises a two-stage RC circuit module, a plurality of LED lamps and an LED driving module; wherein,
The first end of the first thermistor is grounded; the input end of the control module is connected with the second end of the first thermistor, and the input end of the control module is used for inputting a first input voltage; the control module is used for acquiring a first voltage signal between the control module and the first thermistor, calculating the current resistance value of the first thermistor according to the first voltage signal, calculating the current temperature of the car light brightness adjusting circuit according to the current resistance value of the first thermistor, and generating one or more than two first PWM signals according to the current temperature of the car light brightness adjusting circuit;
The first end of the two-stage RC circuit module is correspondingly connected with the first output end of the control module; the second end of the two-stage RC circuit is correspondingly connected with the first end of the LED driving circuit module; the two-stage RC circuit module is used for generating a first analog voltage signal according to the first PWM signal;
The second ends of the LED driving circuit modules are respectively connected with the first ends of the LED lamps; the LED driving circuit module is used for generating a first output current signal according to the first analog voltage signal and controlling the brightness of the LED lamps through the first output current signal;
the second ends of the LED lamps are sequentially connected with each other and grounded;
In the two-stage RC circuit module, the maximum value of the first output current output by the LED driving module is controlled by the resistance values of the LED lamps.
Optionally, when the vehicle lamp brightness adjusting circuit includes more than two first vehicle lamp brightness modulating modules, at least two first vehicle lamp brightness modulating modules include the plurality of LED lamps with two resistances respectively.
Optionally, each of the first lamp brightness modulation modules includes: the first resistor, the second resistor, the first BIN resistor, the first capacitor and the second capacitor; wherein,
The first end of the first resistor is connected with the output end of the control module, the second end of the first resistor is connected with the first end of the first BIN resistor, the first end of the second resistor and the first end of the first capacitor, and the second end of the first BIN resistor is grounded; the second end of the first capacitor is grounded; the second end of the second resistor is connected with the first end of the second capacitor and the LED driving module; the second end of the second capacitor is grounded; wherein the first analog voltage signal characterizes a voltage signal of a node between the second resistor and the second capacitor.
Optionally, the lamp brightness adjusting circuit further comprises a third resistor; the first end of the third resistor is connected with the second end of the first thermistor and the input end of the control module; the second end of the third resistor is used for inputting the first input voltage.
According to a second aspect of the present utility model, there is provided a lamp module including the lamp brightness adjusting circuit of any one of the first aspects of the present utility model.
According to a third aspect of the utility model, there is provided an automobile comprising the lamp module according to the second aspect of the utility model.
In each first vehicle lamp brightness modulation module, on one hand, a first thermistor is added into an analog dimming voltage regulation circuit (two-stage RC circuit module), and the adjustment of the lamp brightness is realized by using a control module; the method specifically comprises the following steps: according to the characteristic that the resistance value of the temperature change of the first thermistor changes along with the temperature change, the control module calculates the current temperature of the lamp brightness adjusting circuit according to the current resistance value of the first thermistor by acquiring a first voltage signal and calculating the resistance value according to the first voltage signal, and outputs first PWM signals with different duty ratios according to different current temperature of the lamp brightness adjusting circuit, the first analog voltage signal changes along with the change of the first PWM signals, and the LED driving module adjusts the output first output current according to the first analog voltage signal, so that the brightness of each LED lamp is controlled, and the regulation and control of the temperature of the lamp brightness adjusting circuit can be realized. On the other hand, in the technical scheme provided by the utility model, the first analog voltage signal is controlled by the first PWM signal, the maximum voltage value in the first analog voltage signal is also controlled by the resistance values of a plurality of LED lamps, and the maximum value of the first output current of the LED driving module is limited by the maximum voltage value in the first analog voltage signal, so that the brightness of the LED lamps of different types can be regulated and controlled by the technical scheme provided by the utility model, namely: the same light-emitting brightness can be realized by adjusting the first analog voltage signal no matter what type of the LED lamp (different resistance values) is adopted in the circuit. Therefore, according to the technical scheme provided by the utility model, the control module can indirectly adjust the first analog voltage signal by adjusting the duty ratio of the output first PWM signal while realizing the regulation and control of the temperature of the car lamp brightness adjusting circuit, so that the brightness of the LED lamp can be adjusted, and the LED brightness consistent with the car regulations can be realized no matter what type of LED lamp is adopted. In addition, as the change of the first analog voltage signal is an analog quantity, the first output current output by the first LED driving module cannot be suddenly changed, and the technical scheme provided by the utility model further solves the problem that flicker can occur in the brightness adjustment process. The technical scheme provided by the utility model has the advantages of simple circuit design and reduced circuit complexity and production cost.
Further, the utility model also provides: when the car light brightness adjusting circuit comprises more than two first car light brightness modulating modules, at least two first car light brightness modulating modules respectively comprise a plurality of LED lamps with two resistance values. Therefore, the control module can indirectly adjust the first analog voltage signal by adjusting the duty ratio of the output first PWM signal so as to adjust the brightness of the LED lamps, so that the LED brightness consistent with the vehicle regulations can be realized no matter what type of LED lamp is adopted in each first vehicle lamp brightness modulation module. More importantly, in more than two first vehicle lamp brightness modulation modules; due to the ingenious circuit design in the technical scheme provided by the utility model, when the at least two first car light brightness modulation modules respectively comprise the plurality of LED lamps with two resistance values, the brightness consistency can be realized when the LED lamps with different types are adopted in one circuit, and the LED lamp brightness control circuit is a great span of the existing car light lighting technology.
Drawings
Fig. 1 is a schematic block diagram of a lamp brightness adjusting circuit according to an exemplary embodiment of the present utility model;
Fig. 2 is a schematic block diagram of a lamp brightness adjusting circuit according to another exemplary embodiment of the present utility model;
FIG. 3 is a schematic diagram showing a lamp brightness adjusting circuit according to an exemplary embodiment of the present utility model;
FIG. 4 is a schematic diagram showing a lamp brightness adjusting circuit according to another exemplary embodiment of the present utility model;
Reference numerals illustrate:
R NTC -a first thermistor;
101-a first vehicle light brightness modulation module;
R 1\R'1 -a first resistor;
R BIN\R'BIN -a first BIN resistor;
R 2\R'2 -a second resistor;
R 3- third resistor;
C 1\'C1 -a first capacitance;
C 2\C2' -a second capacitance.
Detailed Description
The car lamp is high in power, a large amount of heat is often generated during working, and on one hand, in order to protect the reliability and service life of a product, the power needs to be adjusted according to the temperature so as to ensure that the temperature is not too high; on the other hand, the car lamp needs to meet certain production regulation requirements, and under the condition of adopting different LED light sources, the consistent illumination intensity of external output is ensured, and the off-current needs to be regulated so as to ensure the consistent light intensity;
Therefore, the lamp brightness adjusting circuit of the lamp always adjusts power according to the temperature of the lamp so as to control the temperature; the output power of different LED lamps is controlled;
The current common method is temperature regulation, and the power of the vehicle lamp is regulated by a single first thermistor, so that the power regulation and the temperature regulation are realized; different resistor voltage division is selected to be suitable for different LED lamps, and BIN resistors are selected; the partial pressure of different LED lamps is obtained through software so as to control the maximum current output;
Respectively acquiring NTC resistors through MCU to control output power and further control LED temperature; the partial voltage of BIN resistors distributed by each LED is respectively collected through the LEDs so as to control the maximum output power and further control the brightness; namely: the MCU obtains the NTC resistor and the BIN resistor and then controls the duty ratio of the output PWM to achieve the purpose of controlling the power of the lamp, and the lamp brightness adjusting circuit adopts PWM digital modulation; the whole mode can see a certain flicker under a high-definition video instrument when the frequency is low,
The problems in the technical scheme are as follows: the PWM digital adjustment mode can have certain flicker under a high-definition video instrument, and the resistor and the circuit required by the independent control of the NTC and the BIN are relatively complex and have higher cost compared with the method. Furthermore, in the conventional solution, NTC and BIN are controlled separately, and thus, the required BIN resistance is several, and thus the circuit is thought to be complicated.
In view of this, the inventors of the present application have proposed: the MCU generates PWM signals to output stable voltage through the two-stage RC circuit, and the driving of the LED controls the current for driving the LED lamp by recognizing the voltage of U2, so that the brightness change of the lamp is realized. The two-stage RC circuit realizes the control of the brightness of the lamps with different LED models, and PWM digital modulation is realized through the MCU; the whole mode is converted into analog quantity, so that the problem of brightness flicker is solved. The circuit is simplified and the cost is reduced.
A lamp brightness adjustment circuit, a lamp module, and a vehicle according to the present utility model will be described in more detail with reference to the accompanying drawings, in which preferred embodiments of the present utility model are shown, it being understood that one skilled in the art can modify the present utility model described herein while still achieving the advantageous effects of the present utility model. Accordingly, the following description is to be construed as broadly known to those skilled in the art and not as limiting the utility model.
Referring to fig. 1-4, according to an embodiment of the present utility model, there is provided a lamp brightness adjusting circuit, including: one or more first lamp brightness modulation modules 101, first thermistors, and control modules; wherein the first vehicle lamp modulation module comprises: the LED driving device comprises a two-stage RC circuit module, an LED lamp and an LED driving module; in a specific example, the control module is an MCU, the first thermistor is a BIN resistor, and of course, specific implementation forms of the control module and the first thermistor may also be other implementation forms, and any specific implementation forms of the control module and the first thermistor are within the protection scope of the present utility model, which is not limited by the present utility model;
wherein the first end of the first thermistor is grounded; the resistance value of the first thermistor reflects the temperature of the car light brightness adjusting circuit;
The input end of the control module is connected with the second end of the first thermistor, and the input end of the control module is used for inputting a first input voltage; the control module is used for acquiring a first voltage signal between the control module and the first thermistor, calculating the current resistance value of the first thermistor according to the first voltage signal, calculating the current temperature of the car light brightness adjusting circuit according to the current resistance value of the first thermistor, generating one or more than two first PWM signals according to the current temperature of the car light brightness adjusting circuit, and respectively sending the one or more than two first PWM signals to the corresponding two-stage RC circuit modules;
the first end of the two-stage RC circuit module is correspondingly connected with the first output end of the control module; the second end of the two-stage RC circuit is correspondingly connected with the first end of the LED driving circuit module; the two-stage RC circuit module is used for receiving the first PWM signal sent by the control module, generating a first analog voltage signal according to the first PWM signal, and sending the first analog voltage signal to the LED drive circuit module;
The second ends of the LED driving circuit modules are respectively connected with the first ends of the LED lamps; the LED driving circuit module is used for receiving the first analog voltage signal, generating a first output current signal according to the first analog voltage signal, and respectively sending the first output current signal to the LED lamps so as to control the brightness of the LED lamps;
the second ends of the LED lamps are sequentially connected with each other and grounded;
In the two-stage RC circuit module, the maximum voltage value of the first analog voltage signal is also controlled by the resistance values of the LED lamps, so that the maximum value of the first output current output by the LED driving module is controlled by the resistance values of the LED lamps.
When the vehicle lamp brightness adjusting circuit includes more than two first vehicle lamp brightness modulating modules 101, at least two first vehicle lamp brightness modulating modules 101 respectively include the plurality of LED lamps with two resistances.
In one embodiment, the lamp brightness adjustment circuit comprises a first lamp brightness modulation module 101; as shown in fig. 1; wherein a first voltage signal between the control module and the first thermistor is denoted by U O;
In other embodiments, the lamp brightness adjustment circuit includes any number of the first lamp brightness modulation modules 101; in an exemplary embodiment, the lamp brightness adjusting circuit includes two first lamp brightness modulating modules 101, as shown in fig. 2;
In each first lamp brightness modulation module 101, on one hand, a first thermistor is added into an analog dimming voltage regulation circuit (two-stage RC circuit module), and the adjustment of the lamp brightness is realized by a control module; the method specifically comprises the following steps: according to the characteristic that the resistance value of the temperature change of the first thermistor changes along with the temperature change, the control module calculates the current temperature of the lamp brightness adjusting circuit according to the current resistance value of the first thermistor by acquiring a first voltage signal and calculating the resistance value according to the first voltage signal, and outputs first PWM signals with different duty ratios according to different current temperature of the lamp brightness adjusting circuit, the first analog voltage signal changes along with the change of the first PWM signals, and the LED driving module adjusts the output first output current according to the first analog voltage signal, so that the brightness of each LED lamp is controlled, and the regulation and control of the temperature of the lamp brightness adjusting circuit can be realized.
On the other hand, in the technical scheme provided by the utility model, the first analog voltage signal is controlled by the first PWM signal, the maximum voltage value in the first analog voltage signal is also controlled by the resistance values of a plurality of LED lamps, and the maximum value of the first output current of the LED driving module is limited by the maximum voltage value in the first analog voltage signal, so that the brightness of the LED lamps of different types can be regulated and controlled by the technical scheme provided by the utility model, namely: the same light-emitting brightness can be realized by adjusting the first analog voltage signal no matter what type of the LED lamp (different resistance values) is adopted in the circuit.
Therefore, according to the technical scheme provided by the utility model, the control module can indirectly adjust the first analog voltage signal by adjusting the duty ratio of the output first PWM signal while realizing the regulation and control of the temperature of the car lamp brightness adjusting circuit, so that the brightness of the LED lamp can be adjusted, and the LED brightness consistent with the car regulations can be realized no matter what type of LED lamp is adopted.
In addition, as the change of the first analog voltage signal is an analog quantity, the first output current output by the first LED driving module cannot be suddenly changed, and the technical scheme provided by the utility model further solves the problem that flicker can occur in the brightness adjustment process.
In one embodiment, when more than two first lamp brightness modulation modules 101 are included in the lamp brightness adjustment circuit, at least two first lamp brightness modulation modules 101 respectively include the plurality of LED lamps with two resistance values.
Therefore, the control module can indirectly adjust the first analog voltage signal by adjusting the duty ratio of the output first PWM signal to adjust the brightness of the LED lamp, so that the LED brightness consistent with the vehicle regulations can be achieved not only in each first vehicle lamp brightness modulation module 101, but also in any type of LED lamp. More importantly, in more than two first vehicle lamp brightness modulation modules 101; due to the ingenious circuit design in the technical scheme provided by the utility model, when the at least two first car light brightness modulation modules 101 respectively comprise the plurality of LED lamps with two resistance values, the brightness consistency can be realized when the LED lamps with different types are adopted in one circuit, and the circuit is a great span of the existing car light lighting technology.
In one embodiment, the first lamp brightness modulation module 101 includes: the first resistor, the second resistor, the first BIN resistor, the first capacitor and the second capacitor; wherein,
The first end of the first resistor is connected with the output end of the control module, the second end of the first resistor is connected with the first end of the first BIN resistor, the first end of the second resistor and the first end of the first capacitor, and the second end of the first BIN resistor is grounded; the second end of the first capacitor is grounded; the second end of the second resistor is connected with the first end of the second capacitor and the LED driving module; the second end of the second capacitor is grounded;
wherein the first analog voltage signal characterizes a voltage signal of a node between the second resistor and the second capacitor.
In an exemplary embodiment, the lamp brightness adjustment circuit includes a first lamp brightness modulation module 101, as shown in fig. 3; wherein U2 represents a first analog voltage signal; the first input voltage provides a voltage of 5V; u1 represents a voltage signal of a node between the first resistor and the first BIN resistor; r NTC -a first thermistor; r 1 represents a first resistance; r BIN represents a first BIN resistance; r 2 represents a second resistance; r 3 represents a third resistance; c 1 denotes a first capacitance; c 2 denotes a second capacitance.
In another exemplary embodiment, the lamp brightness adjusting circuit includes two first lamp brightness modulating modules 101, as shown in fig. 4; wherein U2 represents a first analog voltage signal in one of the first lamp brightness modulation modules 101; u'2 represents a first analog voltage signal in the further first vehicle lamp brightness modulation module 101; the first input voltage provides a voltage of 5V; u1 represents a voltage signal at a node between a first resistor and a first BIN resistor in the set of first lamp brightness modulation modules 101; u'1 represents a voltage signal at a node between the first resistor and the first BIN resistor in another set of first lamp brightness modulation modules 101; r NTC -a first thermistor; r 1\R'1 -a first resistor; r BIN\R'BIN represents a first BIN resistance; r 2\R'2 represents a second resistance; r 3 represents a third resistance; c 1\'C1 denotes a first capacitance; c 2\C2' represents the second capacitance.
In the technical scheme provided by the embodiment, different types of the LED lamps can use different first BIN resistors, the types of the LED lamps are different, and the resistance values of the first BIN resistors are also different; when the first PWM signal output by the control module changes, the maximum voltage value of the voltage signal between the first resistor and the first BIN resistor is limited by the resistance value of the first BIN resistor. When the control module (taking MCU as an example, the MCU calculates the resistance value of NTC (D first thermistor) by recognizing the voltage of U0 (the first voltage signal of the node between the control module and the first thermistor) through ADC, the voltage outputted by the control module is marked as VCC (usually 5V), and the voltage of the IO port is marked as VCC; the control module can indirectly adjust the first analog voltage signal by adjusting the duty ratio of the output first PWM signal so as to adjust the brightness of the LED lamp, so that the LED brightness consistent with the vehicle rule can be realized no matter what type of LED lamp is adopted.
In one embodiment, the lamp brightness adjusting circuit further comprises a third resistor; the first end of the third resistor is connected with the second end of the first thermistor and the input end of the control module; the second end of the third resistor is used for inputting the first input voltage.
According to an embodiment of the present utility model, there is also provided a lamp module including the lamp brightness adjusting circuit according to any one of the preceding embodiments of the present utility model.
According to an embodiment of the present utility model, there is further provided an automobile, including the lamp module set according to the foregoing embodiment of the present utility model.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (6)
1. A lamp brightness adjustment circuit, comprising: one or more than two first vehicle lamp brightness modulation modules, a first thermistor and a control module; wherein, the first vehicle lamp brightness modulation module includes: the LED driving circuit comprises a two-stage RC circuit module, a plurality of LED lamps and an LED driving module; wherein,
The first end of the first thermistor is grounded; the input end of the control module is connected with the second end of the first thermistor, and the input end of the control module is used for inputting a first input voltage; the control module is used for acquiring a first voltage signal between the control module and the first thermistor, calculating the current resistance value of the first thermistor according to the first voltage signal, calculating the current temperature of the car light brightness adjusting circuit according to the current resistance value of the first thermistor, and generating one or more than two first PWM signals according to the current temperature of the car light brightness adjusting circuit;
The first end of the two-stage RC circuit module is correspondingly connected with the first output end of the control module; the second end of the two-stage RC circuit is correspondingly connected with the first end of the LED driving circuit module; the two-stage RC circuit module is used for generating a first analog voltage signal according to the first PWM signal;
The second ends of the LED driving circuit modules are respectively connected with the first ends of the LED lamps; the LED driving circuit module is used for generating a first output current signal according to the first analog voltage signal and controlling the brightness of the LED lamps through the first output current signal;
the second ends of the LED lamps are sequentially connected with each other and grounded;
In the two-stage RC circuit module, the maximum value of the first output current output by the LED driving module is controlled by the resistance values of the LED lamps.
2. The lamp brightness adjustment circuit of claim 1, wherein when more than two of the first lamp brightness modulation modules are included in the lamp brightness adjustment circuit, at least two of the first lamp brightness modulation modules each include the plurality of LED lamps having two resistances.
3. The vehicle lamp brightness adjustment circuit of claim 2, wherein each of the first vehicle lamp brightness modulation modules comprises: the first resistor, the second resistor, the first BIN resistor, the first capacitor and the second capacitor; wherein,
The first end of the first resistor is connected with the output end of the control module, the second end of the first resistor is connected with the first end of the first BIN resistor, the first end of the second resistor and the first end of the first capacitor, and the second end of the first BIN resistor is grounded; the second end of the first capacitor is grounded; the second end of the second resistor is connected with the first end of the second capacitor and the first end of the LED driving module; the second end of the second capacitor is grounded; wherein the first analog voltage signal characterizes a voltage signal of a node between the second resistor and the second capacitor.
4. The lamp brightness adjustment circuit of claim 3, wherein the lamp brightness adjustment circuit further comprises a third resistor; the first end of the third resistor is connected with the second end of the first thermistor and the input end of the control module; the second end of the third resistor is used for inputting the first input voltage.
5. A lamp module comprising the lamp brightness adjusting circuit according to any one of claims 1 to 4.
6. An automobile comprising the lamp module of claim 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323116932.6U CN221409164U (en) | 2023-11-20 | 2023-11-20 | Car light brightness adjusting circuit, car light module and car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323116932.6U CN221409164U (en) | 2023-11-20 | 2023-11-20 | Car light brightness adjusting circuit, car light module and car |
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| Publication Number | Publication Date |
|---|---|
| CN221409164U true CN221409164U (en) | 2024-07-23 |
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| CN202323116932.6U Active CN221409164U (en) | 2023-11-20 | 2023-11-20 | Car light brightness adjusting circuit, car light module and car |
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- 2023-11-20 CN CN202323116932.6U patent/CN221409164U/en active Active
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