CN211019321U - Automatic switching control device for solar charging and night scene lighting - Google Patents
Automatic switching control device for solar charging and night scene lighting Download PDFInfo
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- CN211019321U CN211019321U CN201922021746.1U CN201922021746U CN211019321U CN 211019321 U CN211019321 U CN 211019321U CN 201922021746 U CN201922021746 U CN 201922021746U CN 211019321 U CN211019321 U CN 211019321U
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Abstract
The utility model discloses an automatic switch-over controlling means of solar charging and night scene illumination, control circuit pass through illumination sensor and acquire current illumination intensity, when the illumination intensity that detects is greater than preset illumination intensity, control shift assembly work with N night scene lamp plate shifts to adjacent night scene lamp plate directly over respectively, and control L ED drive circuit stop work, so that solar panel exposes and receives the sunlight in order to right energy storage circuit charges to and when the illumination intensity that detects is less than preset illumination intensity, control N night scene lamp plate resets and covers solar panel, and control L ED drive circuit carries out night scene illumination work, thereby realized night scene lamp night scene illumination and the beneficial effect of solar panel energy storage that charges on daytime, and need not to set up extra installation space, reduced external factor and artificial external force influence.
Description
Technical Field
The utility model relates to a night scene illumination technical field, in particular to automatic switch-over controlling means of solar charging and night scene illumination.
Background
Current solar energy night scene lamp, solar panel need additionally set up an independent space and install because the area is great, but when independent setting, solar panel not only need occupy certain space, and the external force that easily receives environment and human factor simultaneously influences and leads to damaging.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an automatic switch-over controlling means of solar charging and night scene illumination aims at solving above-mentioned technical problem.
In order to achieve the above object, the utility model provides an automatic switching control device for solar charging and night scene lighting, which comprises a fixing part, a plurality of night scene lamp panels, N solar panels, an energy storage circuit, L ED driving circuits, a control circuit, N shifting components and a light sensor;
the plurality of night scene lamp panel arrays are arranged on the fixing piece, the N solar panels are arranged under the N night scene lamp panels in the plurality of night scene lamp panel arrays one by one and are installed on the fixing piece, and the N solar panels are arranged in series and parallel and output direct-current power supplies from connecting nodes;
a charging port of the energy storage circuit is connected with the connection nodes of the N solar panels, a discharging port of the energy storage circuit is connected with a power input end of the L ED drive circuit, and a power output end of the L ED drive circuit is correspondingly connected with power ends of the night scene lamp panels;
the signal end of the control circuit is connected with the signal end of the illumination sensor, and the control end of the control circuit is respectively connected with the controlled end of the energy storage circuit, the controlled end of the displacement assembly and the controlled end of the L ED drive circuit;
each shifting assembly is horizontally arranged along the night scene lamp panel and the adjacent night scene lamp panel and is in sliding connection with the corresponding night scene lamp panel and the corresponding fixed plate;
the illumination sensor is used for detecting the current illumination intensity;
the control circuit controls the N shifting assemblies to slide when the detected illumination intensity is greater than the preset illumination intensity so as to shift the N night scene lamp panels to be right above the adjacent night scene lamp panels respectively, controls the L ED drive circuit to stop outputting drive signals to the night scene lamp panels so that the solar panel is exposed and receives sunlight to charge the energy storage circuit, and controls the L ED drive circuit to receive sunlight to charge the energy storage circuit
When the illumination intensity that detects is less than predetermineeing illumination intensity, control N shift unit slides and resets, in order to be N night scene lamp plate covers solar panel, and control L ED drive circuit output drive signal is extremely a plurality of night scene lamp plate is in a plurality of the drive night scene lamp plate carries out night scene lighting work.
Preferably, each night vision lamp panel includes a lamp panel housing, at least one printed circuit board disposed in the lamp panel housing, and a plurality of L ED light sources soldered on the printed circuit board.
Preferably, N the height of night vision lamp plate is greater than rather than adjacent night vision lamp plate, each the aversion subassembly rotates wheel and belt including setting up motor, first rotation wheel, a plurality of first loose pulley assembly, the second on the mounting, the controlled end of motor with control circuit's control end is connected, first rotation wheel with the second is rotated the wheel setting and is two adjacent the apex angle of night vision lamp plate, first loose pulley assembly and two adjacent the top of a night vision lamp plate in the night vision lamp plate is fixed to be set up, the belt encircle install in first rotation wheel, second rotate the wheel with on the first loose pulley assembly, first rotation wheel with the second rotate the wheel with the motor rotates to be connected, so that the motor drives the belt rotates and drives first loose pulley assembly slides.
Preferably, the shifting assembly further comprises a limiting assembly, and the limiting assembly is arranged on the inner side of the first rotating wheel and the inner side of the second rotating wheel respectively.
Preferably, the aversion subassembly still includes second sliding assembly and guide rail, second sliding assembly and two adjacent the fixed setting in bottom of one of night vision lamp plate, the guide rail sets up on the fixed plate to set up two adjacent the bottom of night vision lamp plate and with second sliding assembly slidable mounting.
Preferably, N the night vision lamp plate is with the setting of going in the same row or with arranging in the same column.
Preferably, N night scene lamp plate sets up the edge side of mounting.
Preferably, the energy storage circuit comprises a storage battery, a charging circuit and a discharging circuit, the charging circuit is connected between the storage battery and the solar panel, the discharging circuit is connected between the storage battery and the L ED driving circuit, and a controlled end of the charging circuit and a controlled end of the discharging circuit are respectively connected with a control end of the control circuit;
the charging circuit is used for charging according to a control signal of the control circuit;
and the discharge circuit is used for performing discharge operation according to the control signal of the control circuit.
The utility model discloses technical scheme is through setting up the mounting on outdoor scene wall or bridge to with solar panel and night scene lamp plate fixed mounting on the mounting, wherein, night scene lamp plate array sets up, and solar panel correspondence one by one sets up under the night scene lamp plate, and control circuit acquires current illumination intensity through illumination sensor, and when the illumination intensity that detects is greater than preset illumination intensity, control aversion subassembly work is in order to with N night scene lamp plate shifts to adjacent night scene lamp plate directly over respectively, and control L ED drive circuit stop work, so that solar panel exposes and receives the sunlight in order to right energy storage circuit charges to and when the illumination intensity that detects is less than preset illumination intensity, control N night scene lamp plate resets and covers solar panel to control L ED drive circuit carries out night scene illumination work, thereby realized night scene illumination and solar panel day charging energy storage's beneficial effect, and need not to set up extra installation space, reduce external factor and artificial external force influence.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic block diagram of an embodiment of an automatic switching control device for solar charging and night scene lighting according to the present invention;
fig. 2 is a schematic structural view of an embodiment of a night light panel in the automatic switching control device for solar charging and night lighting of the present invention;
fig. 3 is a schematic structural view of an embodiment of a shift assembly in the automatic switching control device for solar charging and night scene lighting according to the present invention;
fig. 4 is a schematic block diagram of an embodiment of an energy storage circuit in the automatic switching control device for solar charging and night scene lighting according to the present invention.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that the description relating to "first", "second", etc. in the present invention is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is: the method comprises three parallel schemes, wherein the scheme is taken as an A/B (A/B) as an example, the scheme comprises a scheme A, a scheme B or a scheme A and a scheme B which are simultaneously met, in addition, the technical schemes between the various embodiments can be combined with each other, but the technical schemes must be realized by a person with ordinary skill in the art as a basis, and when the technical schemes are mutually contradictory or can not be realized, the combination of the technical schemes is not considered to exist, and the protection scope of the invention is not within the protection scope of the invention.
The utility model provides an automatic switch-over controlling means of solar charging and night scene illumination.
As shown in fig. 1, the automatic switching control device for solar charging and night scene lighting of the present invention comprises a fixing member (not shown), a plurality of night scene lamp panels, N solar panels 20, an energy storage circuit 60, L ED driving circuit 50, a control circuit 30, N shifting assemblies 40, and an illumination sensor 70;
the plurality of night scene lamp panel arrays are arranged on the fixing piece, the N solar panels 20 are arranged under the N night scene lamp panels in the plurality of night scene lamp panel arrays one by one and are installed on the fixing piece, and the N solar panels 20 are arranged in series and parallel and output direct-current power supplies from the connecting nodes;
a charging port of the energy storage circuit 60 is connected with the connection nodes of the N solar panels 20, a discharging port of the energy storage circuit 60 is connected with a power input end of the L ED driving circuit 50, and a power output end of the L ED driving circuit 50 is correspondingly connected with power ends of the night scene lamp panels;
the signal end of the control circuit 30 is connected with the signal end of the illumination sensor 70, and the control end of the control circuit 30 is respectively connected with the controlled end of the energy storage circuit 60, the controlled end of the shift assembly 40 and the controlled end of the L ED driving circuit 50;
each shifting assembly 40 is horizontally arranged along the night scene lamp panel and the adjacent night scene lamp panel and is in sliding connection with the corresponding night scene lamp panel and the fixing plate;
an illumination sensor 70 for detecting the current illumination intensity;
a control circuit 30 for controlling the N shift assemblies 40 to slide when the detected illumination intensity is greater than the preset illumination intensity so as to shift the N night-scene lamp panels to be right above the adjacent night-scene lamp panels respectively, and controlling the L ED drive circuit 50 to stop outputting the drive signals to the night-scene lamp panels so that the solar panel 20 is exposed and receives the sunlight to charge the energy storage circuit 60, and
when the illumination intensity that detects is less than predetermineeing illumination intensity, the slip of the control N displacement assembly 40 resets to cover solar panel 20 with a plurality of night scene lamp plates, and control L ED drive circuit 50 output drive signal to a plurality of night scene lamp plates, carry out night scene illumination work with a plurality of night scene lamp plates of drive.
In this embodiment, solar panel 20 and night scene lamp plate are through the riveting, modes such as welding are fixed on the mounting, the mounting can be fixed plate or strip installed part, for example, the steel sheet, billet etc., the night scene lamp is arranged through the mounting and is carried out the night scene illumination in the outer scene wall, solar panel 20 hides under the night scene lamp plate when the night scene illumination simultaneously, solar panel 20's number, size, concrete connection mode and working parameter correspond selection and setting according to the power of night scene lamp, requirements such as load size, do not do specific display here, be connected with energy storage circuit 60 after a plurality of solar panel 20 cluster parallel connection, and charge for energy storage circuit 60 when the day.
The specific working process is illustrated in fig. 1, taking two adjacent night scene lamp panels, namely a first night scene lamp panel 11 and a second night scene lamp panel 12 as an example, and the solar panel 20 and the second night scene lamp panel 12 are kept horizontal, when the position of the first night scene lamp panel 11 is higher than that of the solar panel 20 and the daytime second night scene lamp panel 12, the illumination sensor 70 sends a detected illumination detection signal to the control circuit 30, the control circuit 30 compares the illumination intensity with a preset illumination intensity, when the illumination of sunlight is higher than the preset illumination intensity, the charging condition of the solar panel 20 is met, at this time, the control circuit 30 controls the displacement assembly 40 to work, the displacement assembly 40 transversely displaces the first night scene lamp panel 11 to be right above the second night scene lamp panel 12, the solar panel 20 receives sunlight and converts the sunlight into a direct current power supply to be output to the energy storage circuit 60, so as to charge the energy storage circuit for the energy storage, at the same time, the control L driving circuit 50 stops working of the night scene lamp control, the night scene lamp is turned off, when the illumination intensity is lower than the preset illumination intensity, it indicates that the current environmental brightness is not high, the energy conversion cannot be performed, the control circuit 30 controls the displacement assembly 30 to control the working circuit to control the night scene lamp assembly to control the working effect of the night scene lamp panel 20 to control the night scene lamp assembly L, and the night scene lamp assembly to control the night scene lamp assembly to perform the night scene lamp, thereby, the night scene lamp working effect of the night scene lamp 20, the night scene lamp working.
Wherein, the size of night scene lamp plate and solar panel 20 sets up according to the outer wall structure, the structure of night scene lamp can be selected according to the night scene display demand simultaneously, in an embodiment, as shown in fig. 2, each night scene lamp plate includes the lamp plate casing, set up at least one printed circuit board 11B in the lamp plate casing and weld a plurality of L ED light source 11C on printed circuit board 11B, still be equipped with the connecting wire that is used for inserting drive signal on the lamp plate casing, the connecting wire is connected with printed circuit board 11B, L ED light source 11C can be a plurality of monochromatic lamps, or include three primary colors L ED lamp, red L ED lamp promptly, blue L ED lamp and green L ED lamp, L ED light source 11C's specific color and quantity do not specifically limit, select according to actual demand.
The control circuit 30 can adopt control chip structures such as a single chip microcomputer, an MCU (microprogrammed control unit), a CPU (central processing unit), and the like, the shifting assembly 40 can adopt an electric sliding door structure, an electric traction structure, and the like, and the specific structure is designed according to requirements.
As shown in fig. 3, in an embodiment, each of the shifting units 40 includes a motor (not shown) disposed on the fixed member, a first rotating wheel 41, a plurality of first pulley units 44, a second rotating wheel 42, and a belt 43, a controlled end of the motor is connected to a control end of the control circuit 30, the first rotating wheel 41 and the second rotating wheel 42 are disposed at a top corner of two adjacent night light panels, the first pulley unit 44 is fixedly disposed on a top of one of the two adjacent night light panels, the belt 43 is circumferentially mounted on the first rotating wheel 41, the second rotating wheel 42, and the first pulley unit 44, and the first rotating wheel 41 and the second rotating wheel 42 are rotatably connected to the motor, so that the motor drives the belt 43 to rotate and drive the first pulley unit 44 to slide.
In this embodiment, control circuit 30 rotates through the control motor is just reversing and then first rotation wheel 41 and second rotation wheel 42 equidirectional rotation, and then drive belt 43 and rotate, drive first loose pulley assembly 44 when belt 43 pivoted and rotate, because connecting piece fixed mounting is passed through with the top of night-vision lamp plate to first loose pulley assembly 44, and then drive first night-vision lamp plate 11 sideslip during first loose pulley assembly 44 rotates, control circuit 30 sets for according to stroke or time and violently moves first night-vision lamp plate 11 to second night-vision lamp plate 12 directly over or reset, thereby realized night-vision lamp night-vision illumination and the purpose of solar panel 20 daytime charging energy storage.
Meanwhile, in order to improve the accuracy of displacement, a limiting assembly 45 is further arranged in the displacement assembly 40, the limiting assembly 45 is respectively arranged at the inner sides of the first rotating wheel 41 and the second rotating wheel 42, and the first pulley assembly 44 can stop moving forward after contacting the limiting assembly 45.
Meanwhile, in order to avoid the situation that the belt 43 is lengthened or the first rotating wheel 41 is displaced due to the fact that the weight of the night-scene lamp panel is too large, the displacement assembly 40 is further provided with a second sliding assembly and a guide rail 47, the second sliding assembly is fixedly arranged at the bottom of one of the two adjacent night-scene lamp panels, the guide rail 47 is arranged on the fixing plate, the second sliding assembly is arranged at the bottom of the two adjacent night-scene lamp panels and is slidably mounted with the second sliding assembly, the first sliding assembly slides while driving the second pulley assembly 46 to slide, meanwhile, the second pulley assembly 46 and the guide rail 47 bear the weight of the first night-scene lamp panel 11, and the problem that the belt 43 is lengthened or the first rotating wheel 41 is displaced due to the fact that the weight of the night-scene lamp panel is too large is solved.
The energy storage circuit 60 can adopt a storage battery 62, or a combined circuit of the storage battery 62 and a charging and discharging management circuit, and the specific structure is designed according to requirements, and meanwhile, the installation position of the storage battery 62 can be arranged indoors and close to the solar panel 20.
The utility model discloses technical scheme is through setting up the mounting on outdoor scene wall or bridge, and with solar panel 20 and night scene lamp plate fixed mounting on the mounting, wherein, night scene lamp plate array sets up, solar panel 20 corresponds the one-to-one setting under night scene lamp plate, control circuit 30 acquires current illumination intensity through illumination sensor 70, when the illumination intensity that detects is greater than preset illumination intensity, control aversion subassembly 40 work is in order to shift N night scene lamp plate respectively to adjacent night scene lamp plate directly over, and control L ED drive circuit 50 stop work, so that solar panel 20 exposes and receives the sunlight in order to charge energy storage circuit 60, and when the illumination intensity that detects is less than preset illumination intensity, control N night scene lamp resets and covers solar panel 20, and control L ED drive circuit 50 carries out night scene illumination work, thereby realized night scene lamp night scene illumination and solar panel 20 daytime charge the beneficial effect of holding ability, and need not to set up extra installation space, reduce external factor and artificial external force influence.
In an embodiment, in order to simplify the workload of wiring and installing the shift assemblies 40, the N night-scene lamp panels are arranged in the same row or in the same column, and the solar panels 20 arranged along with the night-scene lamp panels are arranged in the same row or in the same column, so that the connection lines between the solar panels 20 and the connection lines between the shift assemblies 40 and the control circuit 30 can be more conveniently connected.
Further, in order to reduce the overall night scene effect reduction caused by the fact that the N night scene lamp panels and the adjacent night scene lamp panels are not horizontal due to the installation positions, the N night scene lamp panels are arranged on the edge side of the fixing part, the night scene lamp panels arranged on the solar panel 20 cannot influence the overall display effect of the center, and meanwhile, the solar panel 20 and the energy storage circuit 60 are convenient to wire.
As shown in fig. 4, the energy storage circuit 60 includes a storage battery 62, a charging circuit 61 and a discharging circuit 63, the charging circuit 61 is connected between the storage battery 62 and the solar panel 20, the discharging circuit 63 is connected between the storage battery 62 and the L ED driving circuit 50, and the controlled terminal of the charging circuit 61 and the controlled terminal of the discharging circuit 63 are respectively connected with the control terminal of the control circuit 30;
a charging circuit 61 for performing charging operation according to a control signal of the control circuit 30;
the discharging circuit 63 is used for performing discharging operation according to the control signal of the control circuit 30.
In this embodiment, the charging circuit 61 performs the operations of charging protection and voltage conversion, the discharging circuit 63 performs the operations of discharging protection and voltage conversion, the charging circuit 61 may adopt a combination circuit of a voltage clamping circuit and a power conversion circuit, and similarly, the discharging circuit 63 may also adopt a specific circuit structure of a combination circuit of a voltage circuit and a power conversion circuit to select according to the requirement.
The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (8)
1. An automatic switching control device for solar charging and night scene lighting is characterized by comprising a fixing piece, a plurality of night scene lamp panels, N solar panels, an energy storage circuit, an L ED driving circuit, a control circuit, N shifting assemblies and an illumination sensor;
the plurality of night scene lamp panel arrays are arranged on the fixing piece, the N solar panels are arranged under the N night scene lamp panels in the plurality of night scene lamp panel arrays one by one and are installed on the fixing piece, and the N solar panels are arranged in series and parallel and output direct-current power supplies from connecting nodes;
a charging port of the energy storage circuit is connected with the connection nodes of the N solar panels, a discharging port of the energy storage circuit is connected with a power input end of the L ED drive circuit, and a power output end of the L ED drive circuit is correspondingly connected with power ends of the night scene lamp panels;
the signal end of the control circuit is connected with the signal end of the illumination sensor, and the control end of the control circuit is respectively connected with the controlled end of the energy storage circuit, the controlled end of the displacement assembly and the controlled end of the L ED drive circuit;
each shifting assembly is horizontally arranged along the night scene lamp panel and the adjacent night scene lamp panel and is in sliding connection with the corresponding night scene lamp panel and the corresponding fixed plate;
the illumination sensor is used for detecting the current illumination intensity;
the control circuit controls the N shifting assemblies to slide when the detected illumination intensity is greater than the preset illumination intensity so as to shift the N night scene lamp panels to be right above the adjacent night scene lamp panels respectively, controls the L ED drive circuit to stop outputting drive signals to the night scene lamp panels so that the solar panel is exposed and receives sunlight to charge the energy storage circuit, and controls the L ED drive circuit to receive sunlight to charge the energy storage circuit
When the illumination intensity that detects is less than predetermineeing illumination intensity, control N shift unit slides and resets, in order to be N night scene lamp plate covers solar panel, and control L ED drive circuit output drive signal is extremely a plurality of night scene lamp plate is in a plurality of the drive night scene lamp plate carries out night scene lighting work.
2. The automatic switching control device of solar charging and night scene lighting as claimed in claim 1, wherein each night scene light panel comprises a light panel housing, at least one printed circuit board disposed in the light panel housing, and a plurality of L ED light sources soldered on the printed circuit board.
3. The automatic switching control device of solar energy and night scene lighting as claimed in claim 1, wherein the height of N night scene lamp panels is greater than that of the adjacent night scene lamp panels, each shifting assembly comprises a motor, a first rotating wheel, a plurality of first pulley assemblies, a second rotating wheel and a belt, the motors are arranged on a fixing member, the controlled ends of the motors are connected with the control end of the control circuit, the first rotating wheel and the second rotating wheel are arranged at the top corners of two adjacent night scene lamp panels, the first pulley assembly is fixedly arranged on the top of one of the two adjacent night scene lamp panels, the belts are arranged on the first rotating wheel, the second rotating wheel and the first pulley assembly in a surrounding manner, and the first rotating wheel and the second rotating wheel are rotatably connected with the motors, so that the motor drives the belt to rotate and the first pulley component to slide.
4. The automatic switching control device of solar charging and night scene lighting as claimed in claim 3, wherein said shifting assembly further comprises a limiting assembly disposed inside said first and second rotating wheels, respectively.
5. The automatic switching control device of solar charging and night scene lighting as claimed in claim 4, wherein the shift assembly further comprises a second sliding assembly fixedly disposed at the bottom of one of two adjacent night scene light lamp panels and a guide rail disposed on the fixing plate and slidably mounted at the bottom of two adjacent night scene light lamp panels.
6. The automatic switching control device of solar charging and night scene lighting as claimed in claim 1, wherein N night scene lamp panels are arranged in the same row or in the same column.
7. The automatic switching control device of solar charging and night-scene lighting as claimed in claim 1, wherein N night-scene light panels are disposed at the edge side of the fixing member.
8. The automatic switching control device of solar charging and night scene lighting as claimed in claim 3, wherein said energy storage circuit comprises a storage battery, a charging circuit and a discharging circuit, said charging circuit is connected between said storage battery and said solar panel, said discharging circuit is connected between said storage battery and said L ED driving circuit, a controlled terminal of said charging circuit and a controlled terminal of said discharging circuit are respectively connected with a control terminal of said control circuit;
the charging circuit is used for charging according to a control signal of the control circuit;
and the discharge circuit is used for performing discharge operation according to the control signal of the control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922021746.1U CN211019321U (en) | 2019-11-20 | 2019-11-20 | Automatic switching control device for solar charging and night scene lighting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922021746.1U CN211019321U (en) | 2019-11-20 | 2019-11-20 | Automatic switching control device for solar charging and night scene lighting |
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| Publication Number | Publication Date |
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| CN211019321U true CN211019321U (en) | 2020-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922021746.1U Active CN211019321U (en) | 2019-11-20 | 2019-11-20 | Automatic switching control device for solar charging and night scene lighting |
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| CN (1) | CN211019321U (en) |
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- 2019-11-20 CN CN201922021746.1U patent/CN211019321U/en active Active
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