CN111795356A - Illumination light distribution system of bicycle lamp and bicycle lamp - Google Patents

Illumination light distribution system of bicycle lamp and bicycle lamp Download PDF

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Publication number
CN111795356A
CN111795356A CN202010523468.4A CN202010523468A CN111795356A CN 111795356 A CN111795356 A CN 111795356A CN 202010523468 A CN202010523468 A CN 202010523468A CN 111795356 A CN111795356 A CN 111795356A
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CN
China
Prior art keywords
light
light source
bicycle
reflecting surface
led light
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010523468.4A
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Chinese (zh)
Inventor
高国华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiashan Shengguang Electronics Co ltd
Original Assignee
Jiashan Shengguang Electronics Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jiashan Shengguang Electronics Co ltd filed Critical Jiashan Shengguang Electronics Co ltd
Priority to CN202010523468.4A priority Critical patent/CN111795356A/en
Publication of CN111795356A publication Critical patent/CN111795356A/en
Priority to DE202021103118.2U priority patent/DE202021103118U1/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
    • F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles
    • F21W2107/13—Use or application of lighting devices on or in particular types of vehicles for land vehicles for cycles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

The utility model provides a bicycle lamps and lanterns illumination grading system and bicycle car light, the illumination grading system of bicycle lamps and lanterns includes first LED light source, second LED light source to and reflector. The first LED light source includes a first optical axis. The second LED light source comprises a second optical axis. The reflector comprises a light source setting surface, an auxiliary reflecting surface, a main reflecting surface and a boundary line. The first and second optical axes are perpendicular to the light source setting surface. The boundary line is parallel to the light source setting surface. The primary light reflecting surface reflects light from the first LED light source and the second LED light source into parallel light and emits the parallel light, and the parallel light reflected by the primary light reflecting surface is parallel to the light source arrangement surface. The included angle between the light reflected by the auxiliary reflecting surface and the light source setting surface is an acute angle. The illumination light distribution system can meet the requirements of some countries on light spot structures, can also realize free switching of high and low beams, and meets the market requirements.

Description

Illumination light distribution system of bicycle lamp and bicycle lamp
Technical Field
The invention belongs to the technical field of light distribution of lamps, and particularly relates to a lighting light distribution system of a bicycle lamp and a bicycle lamp.
Background
The bicycle is an indispensable vehicle in daily life of people, is used for commuting or outing, and along with low-carbon call and people's interest on health, many people begin to ride the bicycle again. Nowadays, the types of bicycles are very many, including mountain bikes, off-road bikes, and the like, each having its function. However, people often find that the bicycle cannot be ridden due to too dark days when using the street lamp, and even if the street lamp is available, the people can hardly see the road on the ground clearly. Some people can use the flashlight for illumination, but the flashlight held by one hand can cause insecurity when riding, so that the existing bicycle can be provided with the vehicle-mounted lamp arranged on the bicycle frame. Therefore, the lamp is a basic configuration of the bicycle, and when the bicycle runs at night or in bad weather, the lamp can be turned on, so that illumination is provided for the bicycle, and the direction of the bicycle is known by other vehicles.
The car light can be divided into high beam and passing lamp, and passing lamp irradiation distance is short for the vehicle provides closely illumination, under the condition such as road lighting is better, the speed of a motor vehicle is not fast, can generally use the passing lamp. The high beam lamp has concentrated light, larger brightness and far irradiation distance, is used for providing a long distance for vehicles, generally has no other illumination on roads, and uses the high beam lamp when the speed of the vehicle is faster. Meanwhile, with the development of science and technology and the improvement of living standard, some countries have specific requirements on light spots formed by lamps loaded on bicycles, rather than just lighting. Therefore, how to realize the far and near light and meet the requirement of certain countries on the facula formed by the bicycle lamp becomes a requirement of the bicycle lamp.
Disclosure of Invention
In view of the above, the present invention provides a lighting light distribution system of a bicycle lamp and a bicycle lamp, which can form a predetermined light spot, so as to solve the above problems.
A lighting light distribution system of a bicycle lamp comprises a first LED light source, a second LED light source arranged at an interval with the first LED light source, and a light reflecting bowl arranged in light paths of the first LED light source and the second LED light source. The first LED light source includes a first optical axis. The second LED light source comprises a second optical axis. The light reflecting bowl comprises a light source setting surface, an auxiliary light reflecting surface connected with the light source setting surface, a main light reflecting surface adjacent to the auxiliary light reflecting surface, and an interface line arranged between the main light reflecting surface and the auxiliary light reflecting surface. The first and second optical axes are perpendicular to the light source setting surface. The boundary line is parallel to the light source setting surface. And the main reflecting surface reflects the light from the first LED light source and the second LED light source into parallel light and emits the parallel light along the sections of the first optical axis and the second optical axis, and the parallel light reflected by the main reflecting surface is parallel to the light source arrangement surface. And the auxiliary reflecting surface reflects light from the second LED light source on the section along the first optical axis and the second optical axis, and an included angle between light reflected by the auxiliary reflecting surface and the light source arrangement surface is an acute angle.
Further, the first optical axis and the second optical axis are arranged in parallel.
Further, the primary light reflecting surface is arc-shaped on a cross section perpendicular to the arrangement direction of the first and second optical axes.
Furthermore, an extension line of a second optical axis of the second light source on a section along the first and second optical axes passes through the primary light reflecting surface.
Further, the secondary reflecting surface is internally embedded on the primary reflecting surface.
Further, the irradiation distance of the light emitted from the primary reflecting surface is longer than that of the light emitted from the secondary reflecting surface.
A bicycle lamp, its characterized in that: the bicycle lamp comprises the bicycle lamp lighting light distribution system and a lamp shell, wherein the lamp shell is used for assembling the bicycle lamp lighting light distribution system, the lamp shell comprises an outer shell and an inner shell arranged in the outer shell, the light source arrangement surface is arranged on the outer shell, and the outer shell is parallel to the horizontal plane.
Further, the bicycle lamp further comprises a control module electrically connected with the first LED light source and the second LED light source, and the control module controls light emitting of one of the first LED light source and the second LED light source.
Furthermore, the bicycle comprises a control module electrically connected with the first LED light source and the second LED light source, and the control module controls the first LED light source and the second LED light source to emit light simultaneously.
Further, the first and second optical axes are perpendicular to a horizontal plane in use.
Compared with the prior art, the lighting and light distribution system of the bicycle lamp is provided with the first LED light source and the second LED light source, and the main reflecting surface and the auxiliary reflecting surface are correspondingly arranged, the main reflecting surface emits light from the first LED light source and the second LED light source in a parallel light mode, and the direction of the parallel light is parallel to the light source arrangement surface, namely a horizontal plane, so that the parallel light can emit to a position far away from the bicycle lamp to form far-reaching light. The secondary reflecting surface only receives effective light from the second LED light source, and an included angle between the emergent direction of the reflected light after reflection and the light source arrangement surface is an acute angle, so that the reflected light can be emitted to a place close to the vehicle lamp to form near light. When the control module controls the working states of the first LED light source and the second LED light source, the switching of the high beam and the low beam or the simultaneous opening can be realized. In addition, because the primary reflection light receives the emergent light from the first LED light source and the second LED light source, the parallel light corresponding to the primary reflection surface forms a bright light spot on the ground, and the emergent light corresponding to the secondary reflection surface forms a light band on the ground due to divergence, so that the requirements of some countries on light spot structures can be met. Based on the characteristics, the illumination light distribution system of the bicycle lamp and the bicycle provided by the invention can meet the requirements of some countries on light spot structures, can also realize free switching of high and low beams, and meet the market requirements.
Drawings
Fig. 1 is an exploded view of the bicycle lamp provided by the present invention.
FIG. 2 is a cross-sectional schematic view of the bicycle light of FIG. 1
FIG. 3 is a schematic view of the light path formed by the bicycle lamp of FIG. 1.
Detailed Description
Specific examples of the present invention will be described in further detail below. It should be understood that the description herein of embodiments of the invention is not intended to limit the scope of the invention.
As shown in fig. 1 to 3, which are schematic structural views of the bicycle lamp provided by the present invention. The bicycle lamp comprises an illumination light distribution system 10 of a bicycle lamp and a lamp shell 20 used for assembling the illumination light distribution system 10 of the bicycle lamp. It is contemplated that the bicycle lamp may also include other functional modules, such as a power module, electrical connection components, and assembly components, etc., which are well known to those skilled in the art and will not be described herein.
The lighting light distribution system 10 of the bicycle lamp comprises a first LED light source 11, a second LED light source 12 arranged at an interval with the first LED light source 11, and a light reflecting bowl 13 arranged in the light paths of the first and second LED light sources 11, 12.
The first LED light source 11 and the second LED light source 12 may have the same specification and parameters, or different specifications and parameters, according to actual needs, such as the brightness requirements of the far and near light. The first and second LED light sources 11 and 12 may each include at least one LED lamp bead. The LED lamp bead should be a technology known to those skilled in the art, and is also called a light emitting diode, which is a semiconductor electronic element capable of converting electric energy into light energy. It is well known to those skilled in the art that each light source should include an optical axis, which should be the guide and standard of the optical design. In the present embodiment, the first LED light source 11 has a first optical axis 111. The second LED light source 12 comprises a second optical axis 121. The first and second optical axes 111, 121 are parallel and spaced apart. The arrangement direction and the spacing distance of the first and second optical axes 111, 121 will be explained below with reference to the specific structure of the light reflecting bowl 13.
The reflector 13 includes a light source installation surface 131, an auxiliary light-reflecting surface 132 connected to the light source installation surface 131, a primary light-reflecting surface 133 adjacent to the auxiliary light-reflecting surface 132, and an interface line 134 disposed between the primary light-reflecting surface 133 and the auxiliary light-reflecting surface 132. The light source installation surface 131 may be a plane, which may be a virtual surface, or an actual plane, and is installed on the lamp housing 20. The first and second optical axes 111 and 121 are perpendicular to the light source installation surface 131. The secondary light reflecting surface 132 is disposed in the light emitting direction of the second LED light source 12, and is used for receiving part of the light from the second LED light source 12 and reflecting the received light. The secondary light-reflecting surface 132 reflects light from the second LED light source 12 on a cross section along the first and second optical axes 111, 121, and an included angle between light rays reflected by the secondary light-reflecting surface 132 and the light source installation surface 131 is an acute angle. The size of the acute angle can be set according to actual needs, and specifically, the light spot formed on the ground by the light reflected by the secondary reflecting surface 132 should be connected with the light spot formed on the ground by the light reflected by the primary reflecting surface 133. As for the specific shape and forming principle of the secondary light reflecting surface 132, it should be the prior art as long as it can realize the path to be reflected, that is, the specific shape of the secondary light reflecting surface 132 should be based on reflecting part of the light emitted from the second LED light source 12, and the included angle between the light ray of the reflected light and the light source setting surface 132 is an acute angle. Specifically, the secondary light reflecting surface 132 is arc-shaped in a cross section perpendicular to the arrangement direction of the first and second optical axes 111 and 121. The primary light reflecting surface 133 is configured to receive the light emitted from the first LED light source 11 and a part of the light emitted from the second LED light source 12. The primary light reflecting surface 133 reflects light from the first LED light source 11 and the second LED light source 12 as parallel light and emits the parallel light in a cross section along the first and second optical axes 111 and 121, and the reflected parallel light of the primary light reflecting surface 133 is parallel to the light source installation surface 131. The primary light reflecting surface 133 is curved in a cross section perpendicular to the arrangement direction of the first and second optical axes 111, 112. The specific shape of the primary light reflecting surface 133 should be subject to reflecting the light from the first LED light source 11 and part of the light emitted from the second LED light source 12 as parallel light. It is understood that, according to the explanation of the present embodiment, the shapes of the primary reflecting surface 133 and the secondary reflecting surface 132 described above can be manufactured to achieve a desired optical emission path as long as the optical light distribution principle of the present invention is understood. The arrangement direction of the primary light reflecting surface 133 and the secondary light reflecting surface 132 is parallel to or coincident with the arrangement direction of the first and second optical axes 111, 121. Specifically, in order to obtain a symmetric light spot, the arrangement direction of the primary light reflecting surface 133 and the secondary light reflecting surface 132 coincides with the arrangement direction of the first and second optical axes 111 and 121, and the arcs of the primary and secondary light reflecting surfaces 133 and 132 should be symmetric to the plane of the first and second optical axes 111 and 121. In order to separate the light spot formed by the primary reflecting surface 133 from the light spot formed by the secondary reflecting surface 132, the secondary reflecting surface 132 is embedded in the primary reflecting surface 133, that is, the secondary reflecting surface 132 and the primary reflecting surface 133 are arranged at intervals. The secondary reflective surface 132 and the primary reflective surface 133 should be spaced apart by the distance that their respective spots are separated but joined together.
The boundary line 134 is formed between the primary light reflecting surface 133 and the secondary light reflecting surface 132, and is parallel to the light source installation surface 131. The first and second optical axes 111, 121 are disposed on one side of the boundary line 134, that is, disposed on the primary light reflecting surface 133, so that the amount of light received by the primary light reflecting surface 133 is greater than the amount of light received by the secondary light reflecting surface 132, and the light spot formed by the primary light reflecting surface 133 is brighter. Meanwhile, since the light emitted from the primary light reflecting surface 133 is parallel light and the light emitted from the secondary light reflecting surface 132 forms an acute angle with the light source installation surface 131, the irradiation distance of the light emitted from the primary light reflecting surface 133 is longer than that of the light emitted from the secondary light reflecting surface 132. Therefore, the light quantity received by the primary reflecting surface 133 is large, which is beneficial to compensate the light quantity loss caused by the large irradiation distance.
The lamp envelope 20 comprises an outer envelope 21 and an inner envelope 22 arranged within the outer envelope 21. The light source installation surface 131 is fixedly installed on the inner case 22. The housing 21 is used for accommodating the light reflecting bowl 13. The specific shape of the housing 21 should be set according to actual needs, and is generally cylindrical, and in this embodiment, the housing 21 is cylindrical with an elliptical cross section. The reflector 13 is fixed on the housing 21 by various methods, such as screwing, fixing with a fastener, or gluing. The inner casing 22 is used for assembling and disposing the light source disposing surface 131, and therefore the inner casing 22 is also a plane, and the assembling manner thereof should be the prior art, and will not be described herein again.
When the bicycle lamp is installed, the inner shell 22 and the light source installation surface 131 should be parallel to a horizontal plane or a ground plane, i.e., the first and second optical axes 111 and 121 are perpendicular to the horizontal plane, so that the bicycle lamp can form a designed light spot.
The bicycle lamp further comprises a control module 30 connected with the first LED light source and the second LED light source 11 and 12, and the control module 30 controls the first LED light source and the second LED light source 11 and 12 to emit light simultaneously or controls one of the first LED light source and the second LED light source 11 and 12 to emit light. It is contemplated that the control module 30 may be a switch, and in particular, the control module 30 is a multi-level switch to control different operating states of the first and second LED light sources 11, 12.
Compared with the prior art, the illumination light distribution system of the bicycle lamp provided by the invention is provided with the first and second LED light sources 11 and 12, and the main and auxiliary light reflecting surfaces 133 and 132 are correspondingly arranged, the main light reflecting surface 132 emits light from the first and second LED light sources 11 and 12 in a parallel light mode, and the direction of the parallel light is parallel to the light source arrangement surface 131, namely a horizontal plane, so that the parallel light can emit far light to a position far away from the bicycle lamp. The secondary reflecting surface 132 receives only the effective light from the second LED light source 133, and an angle between the emitting direction of the reflected light after reflection and the light source installation surface 131 is an acute angle, so that the reflected light can be emitted to a place close to the vehicle lamp to form a near light. When the control module controls the working states of the first and second LED light sources 11 and 12, the switching of the high beam and the low beam or the simultaneous turning on can be realized. In addition, the primary light reflecting surface 133 receives the emergent light from the first and second LED light sources 11 and 12, so that the parallel light corresponding to the primary light reflecting surface 133 forms a bright light spot on the ground, and the emergent light corresponding to the secondary light reflecting surface 132 forms a light band on the ground due to divergence, thereby meeting the requirements of some countries on light spot structures. Based on the characteristics, the illumination light distribution system of the bicycle lamp and the bicycle provided by the invention can meet the requirements of some countries on light spot structures, can also realize free switching of high and low beams, and meet the market requirements.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, and any modifications, equivalents or improvements that are within the spirit of the present invention are intended to be covered by the following claims.

Claims (10)

1. The utility model provides a bicycle lamps and lanterns illumination grading system which characterized in that: the lighting light distribution system of the bicycle lamp comprises a first LED light source, a second LED light source arranged at an interval with the first LED light source, and a reflector arranged in the light paths of the first LED light source and the second LED light source, wherein the first LED light source comprises a first optical axis, the second LED light source comprises a second optical axis, the reflector comprises a light source arrangement surface, an auxiliary reflecting surface connected with the light source arrangement surface, a main reflecting surface adjacent to the auxiliary reflecting surface, and an intersection line arranged between the main reflecting surface and the auxiliary reflecting surface, the first optical axis and the second optical axis are perpendicular to the light source arrangement surface, the intersection line is parallel to the light source arrangement surface, and the main reflecting surface reflects light from the first LED light source and the second LED light source into parallel light along the sections of the first optical axis and the second optical axis and emits the parallel light, the parallel light rays reflected by the main reflecting surface are parallel to the light source setting surface, the light from the second LED light source is reflected by the auxiliary reflecting surface on the section along the first optical axis and the section along the second optical axis, and an included angle between the light rays reflected by the auxiliary reflecting surface and the light source setting surface is an acute angle.
2. The illumination light distribution system of a bicycle light fixture of claim 1, wherein: the first optical axis and the second optical axis are arranged in parallel.
3. The illumination light distribution system of a bicycle light fixture of claim 1, wherein: the main light reflecting surface is arc-shaped on a section perpendicular to the arrangement direction of the first optical axis and the second optical axis.
4. The illumination light distribution system of a bicycle light fixture of claim 1, wherein: and an extension line of a second optical axis of the second light source passes through the main light reflecting surface on a section along the first and second optical axes.
5. The illumination light distribution system of a bicycle light fixture of claim 1, wherein: the secondary reflecting surface is embedded in the primary reflecting surface.
6. The illumination light distribution system of a bicycle light fixture of claim 1, wherein: the irradiation distance of the light emitted by the primary reflecting surface is longer than that of the light emitted by the secondary reflecting surface.
7. A bicycle lamp, its characterized in that: the bicycle lamp comprises an illumination light distribution system of the bicycle lamp as claimed in any one of claims 1 to 6, and a lamp housing for assembling the illumination light distribution system of the bicycle lamp, the lamp housing comprising an outer housing and an inner housing disposed in the outer housing, the light source mounting surface being disposed on the outer housing, the outer housing being parallel to the horizontal plane.
8. The bicycle light of claim 7, wherein: the bicycle lamp further comprises a control module electrically connected with the first LED light source and the second LED light source, and the control module controls light emitting of one of the first LED light source and the second LED light source.
9. The bicycle light of claim 7, wherein: the bicycle comprises a bicycle body and a bicycle handle, wherein the bicycle handle is arranged on the bicycle handle, the bicycle handle is arranged on.
10. The bicycle light of claim 7, wherein: the first and second optical axes are perpendicular to a horizontal plane in use.
CN202010523468.4A 2020-06-10 2020-06-10 Illumination light distribution system of bicycle lamp and bicycle lamp Pending CN111795356A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202010523468.4A CN111795356A (en) 2020-06-10 2020-06-10 Illumination light distribution system of bicycle lamp and bicycle lamp
DE202021103118.2U DE202021103118U1 (en) 2020-06-10 2021-06-09 Light distribution system for a bicycle light and a bicycle light

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010523468.4A CN111795356A (en) 2020-06-10 2020-06-10 Illumination light distribution system of bicycle lamp and bicycle lamp

Publications (1)

Publication Number Publication Date
CN111795356A true CN111795356A (en) 2020-10-20

Family

ID=72803978

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010523468.4A Pending CN111795356A (en) 2020-06-10 2020-06-10 Illumination light distribution system of bicycle lamp and bicycle lamp

Country Status (1)

Country Link
CN (1) CN111795356A (en)

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