CN211264757U - Light reflection and refraction exploration instrument - Google Patents
Light reflection and refraction exploration instrument Download PDFInfo
- Publication number
- CN211264757U CN211264757U CN202020114792.6U CN202020114792U CN211264757U CN 211264757 U CN211264757 U CN 211264757U CN 202020114792 U CN202020114792 U CN 202020114792U CN 211264757 U CN211264757 U CN 211264757U
- Authority
- CN
- China
- Prior art keywords
- spherical shell
- light
- slide rail
- annular slide
- center
- 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.)
- Expired - Fee Related
Links
- 239000007788 liquid Substances 0.000 claims abstract description 21
- 239000000779 smoke Substances 0.000 claims description 18
- 239000000523 sample Substances 0.000 claims description 15
- 230000003287 optical effect Effects 0.000 claims description 5
- 238000009434 installation Methods 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- 235000011089 carbon dioxide Nutrition 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000000077 insect repellent Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004509 smoke generator Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model discloses a light reflection and refraction exploring instrument, which comprises a base and a transparent hollow spherical shell, wherein observation liquid is arranged in the spherical shell, and the sphere center of the spherical shell is positioned at the liquid level center of the observation liquid; the spherical shell is provided with horizontal scale marks capable of marking incident and emergent angles of light rays, and all the horizontal scale marks are positioned in different horizontal planes; the base is rotatably provided with an annular slide rail, the rotation axis of the annular slide rail is along the vertical direction and passes through the spherical center of the spherical shell, the annular slide rail is positioned in the vertical plane, and the center of the projection of the spherical shell in the vertical plane is superposed with the center of the annular slide rail; the annular slide rail is provided with a slide block in a sliding mode, the slide block is provided with a light emitting device, light emitted by the light emitting device penetrates into the spherical center of the spherical shell through the spherical shell, and the light emitted by the light emitting device is parallel to the vertical surface where the annular slide rail is located. The utility model has the advantages that: the operation is convenient, and the light reflection and refraction phenomena can be conveniently observed.
Description
Technical Field
The utility model relates to an instrument field is probed to optics, concretely relates to light reflection and refraction probe.
Background
The light reflection and refraction are common physical phenomena, in the teaching process, in order to facilitate observation and exploration of the light reflection and refraction phenomena, the observation is often carried out by virtue of experimental instruments, for example, the Chinese patent application with the publication number of CN105654824A discloses a light reflection and refraction law exploration instrument, which comprises a panel, a base, a containing bin, a 360-degree dial, a sliding frame, a laser pen and a plumb line, wherein the panel is arranged on the base through a bracket and comprises a circular runway; the base is provided with a level gauge, and an adjustable supporting leg arranged on the base is arranged between the contact surface of the base and the bearing base; the container is a transparent hollow cylinder, the bottom surface of the cylinder is arranged on a panel or a 360-degree dial, and the 360-degree dial is arranged on one bottom surface or panel of the cylinder; the sliding frame is arranged on a circular track of the panel, and the laser pen is arranged on the sliding frame; the fixed end of the plumb line is installed on the panel, and although the exploring instrument can demonstrate the light reflection and refraction scenes, due to the limitation of the structure, an observer can only observe the light reflection and refraction conditions from the front of the exploring instrument, and when other observers need to observe the light reflection and refraction conditions, the whole exploring instrument needs to be moved to the front to face the observer, so that the operation is inconvenient, and the observation is inconvenient.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve lies in: the prior art has the technical problems of inconvenient operation and observation of the light reflection and refraction exploring instrument.
The utility model discloses a realize solving above-mentioned technical problem through following technical means: a light reflection and refraction exploring instrument comprises a horizontally arranged base, wherein a transparent and hollow spherical shell is arranged on the base, observation liquid is arranged in the spherical shell, and the spherical center of the spherical shell is positioned at the center of the liquid level of the observation liquid;
the spherical shell is provided with horizontal scale marks capable of marking incident and emergent angles of light rays, and all the horizontal scale marks are positioned in different horizontal planes;
the base is rotatably provided with an annular slide rail, the rotation axis of the annular slide rail is along the vertical direction and passes through the spherical center of the spherical shell, the annular slide rail is positioned in the vertical plane, and the center of the projection of the spherical shell in the vertical plane is superposed with the center of the annular slide rail;
the annular slide rail is provided with a slide block in a sliding mode, the slide block is provided with a light emitting device, light emitted by the light emitting device is emitted into the spherical center of the spherical shell through the spherical shell, and the light emitted by the light emitting device is parallel to the vertical surface where the annular slide rail is located.
In the practical application of the light reflection and refraction exploring instrument in the utility model, firstly, the base is adjusted to the horizontal state, then the smoke is filled into the spherical shell space above the observation liquid, the light emitting device is opened, then the position of the slide block on the annular slide rail is adjusted, the light emitted by the light emitting device is emitted into the spherical shell through the spherical shell, then the smoke is emitted to the spherical shell center, and then the reflection and refraction occur, so that the demonstration of the reflection and refraction of the light can be simulated, when the light is observed from different directions, the annular slide rail is rotated by a specific angle only along the vertical axis of the spherical center, and the light emitted by the light emitting device is emitted into the spherical shell center through the spherical shell, therefore, after the annular slide rail is rotated by the specific angle, the reflection and refraction conditions of the light in the spherical shell are the same, compared with the prior art, the operation is convenient, and the phenomena of light reflection and refraction can be conveniently observed.
Optimally, the bottom of the base is provided with an adjustable ground foot.
Preferably, the base is provided with a stand column, the stand column is provided with a fixed block, a cross rod is transversely inserted into the fixed block, two bolts are screwed into the fixed block, and the two bolts respectively prop against the stand column and the cross rod;
the cross rod is provided with a stay wire, and the end part of the stay wire is provided with a heavy hammer.
The position of the stay wire can be adjusted at will by adjusting the tightness of the bolt, in practical application, the stay wire is adjusted to be irradiated by light on the stay wire, and then the observation is carried out from one side of the stay wire opposite to the irradiation direction of the light, so that the conclusion that the light and the stay wire are positioned in the same vertical plane can be obtained, and the reflection and refraction rules of the light can be conveniently explored.
Preferably, the horizontal scale lines are circular. The horizontal scale marks are arranged to be circular, so that when the annular slide rail rotates to any angle, the incident angle, the refraction angle and the reflection angle of light can be read through the horizontal scale marks, and the reflection and refraction rules of light can be conveniently researched.
Preferably, the spherical shell is further provided with a vertical marking which is circular and is located in a vertical plane passing through the spherical center of the spherical shell. When light rays are emitted into the spherical shell, the light rays can be emitted along one of the vertical marked lines, and after the light rays are reflected and refracted, the light rays can still hit the same vertical marked line, so that the conclusion that the light rays are positioned in the same vertical plane can be obtained, and the reflection and refraction rules of the light rays are conveniently explored.
Preferably, a smoke generating device is arranged in the spherical shell. The smoke generating device facilitates smoke generation so as to display the irradiation path of light.
Preferably, the annular slide rail is provided with scales capable of marking the light angle emitted by the light emitting device.
Optimally, a cylindrical block is arranged between the spherical shell and the base, and the spherical center of the spherical shell is positioned on the axis of the cylindrical block;
the bottom of the annular slide rail is provided with a circular ring, the inner surface of the circular ring is in sliding fit with the outer surface of the cylindrical block, and the axis of the circular ring is coincident with the axis of the cylindrical block.
Preferably, the sliding blocks are clamped on two sides of the annular sliding rail, bolts are screwed on the sliding blocks, and the bolts are abutted to the annular sliding rail.
Preferably, the slider is provided with an installation block, the installation block is installed on the slider through a bolt, the light emitting device penetrates through the installation block, the bolt is screwed on the installation block, and the bolt abuts against the light emitting device.
The utility model has the advantages that:
1. in the utility model, when the light reflection and refraction exploring instrument is applied practically, the base is firstly adjusted to the horizontal state, then the smoke is filled into the spherical shell space above the observation liquid, the light emitting device is opened, then the position of the slide block on the annular slide rail is adjusted, the light emitted by the light emitting device is emitted into the spherical shell through the spherical shell, then the light is emitted into the spherical shell center through the smoke, then the light is reflected and refracted, the demonstration of the reflection and refraction of the light can be simulated, when the light is observed from different directions, the annular slide rail is rotated along the vertical axis of the spherical center, the annular slide rail is rotated by a specific angle, because the light emitted by the light emitting device is emitted into the spherical shell center through the spherical shell, therefore, after the annular slide rail is rotated by the specific angle, the reflection and refraction conditions of the light in the spherical shell are the same, compared with the prior art, the operation is more convenient, and the phenomena of light reflection and refraction can be observed very conveniently.
2. The position of the stay wire can be adjusted at will by adjusting the tightness of the bolt, in practical application, the stay wire is adjusted to be irradiated by light on the stay wire, and then the observation is carried out from one side of the stay wire opposite to the irradiation direction of the light, so that the conclusion that the light and the stay wire are positioned in the same vertical plane can be obtained, and the reflection and refraction rules of the light can be conveniently explored.
3. The horizontal scale marks are arranged to be circular, so that when the annular slide rail rotates to any angle, the incident angle, the refraction angle and the reflection angle of light can be read through the horizontal scale marks, and the reflection and refraction rules of light can be conveniently researched.
4. When light rays are emitted into the spherical shell, the light rays can be emitted along one of the vertical marked lines, and after the light rays are reflected and refracted, the light rays can still hit the same vertical marked line, so that the conclusion that the light rays are positioned in the same vertical plane can be obtained, and the reflection and refraction rules of the light rays are conveniently explored.
5. The smoke generating device facilitates smoke generation so as to display the irradiation path of light.
Drawings
FIG. 1 is a front view of an optical reflection and refraction probe in an embodiment of the present invention;
FIG. 2 is a left side view of an optical reflection and refraction probe in an embodiment of the present invention;
FIG. 3 is a top view of an optical reflection and refraction probe in an embodiment of the present invention;
FIG. 4 is a front view of an optical reflection and refraction probe of an embodiment of the present invention in practical use;
wherein,
a base-1, adjustable feet-11, upright posts-12, fixed blocks-13, a cross bar-14, a stay wire-15 and a heavy hammer-16;
spherical shell-2, observation liquid-21, horizontal scale mark-22, vertical scale mark-23 and cylindrical block-24;
an annular slide rail-3 and a circular ring-31;
a sliding block-4 and a mounting block-41;
a light emitting device-5.
Detailed Description
To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are 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.
As shown in FIG. 1, the light reflection and refraction exploring instrument comprises a base 1, a spherical shell 2, an annular slide rail 3, a slide block 4 and a light emitting device 5.
As shown in fig. 1 and 3, the base 1 is a flat plate horizontally arranged, is square, and is made of an acrylic plate, and four adjustable feet 11 are arranged at the bottom of the base 1 and are respectively located below four corners of the base 1.
As shown in fig. 1, a vertical column 12 is arranged on the base 1, a fixed block 13 is arranged on the vertical column 12, a cross rod 14 is transversely inserted into the fixed block 13, two bolts are screwed into the fixed block 13, and the two bolts respectively prop against the vertical column 12 and the cross rod 14; the cross bar 14 is provided with a pull line 15, and the end of the pull line 15 is provided with a weight 16.
As shown in fig. 1, a transparent and hollow spherical shell 2 is arranged on a base 1, the spherical shell 2 is spherical and made of acrylic, a cylindrical block 24 is arranged between the spherical shell 2 and the base 1, and the spherical center of the spherical shell 2 is located on the axis of the cylindrical block 24.
As shown in fig. 1, an observation liquid 21 is provided in a spherical shell 2, and the spherical center of the spherical shell 2 is positioned at the center of the liquid surface of the observation liquid 21; the spherical shell 2 is provided with a liquid filling port (not shown in the figure) for filling the observation liquid 21, the observation liquid 21 is in the prior art, and suspension liquid is preferably adopted for the observation liquid 21 according to the demonstration requirement, for example, common hand sanitizer in the market or a few drops of milk in clean water is adopted for ensuring a clear propagation path of demonstration light.
Alternatively, the smoke generating device can be arranged outside, and in practical application, smoke is injected into the spherical shell 2 through the liquid filling port.
As shown in fig. 1, horizontal scale lines 22 capable of indicating the incident and emergent angles of light rays are arranged on the spherical shell 2, and all the horizontal scale lines 22 are located in different horizontal planes; horizontal scale mark 22 is circular, still be provided with vertical scale line 23 on spherical shell 2, vertical scale line 23 is circular, and vertical scale line 23 is located the vertical plane through spherical shell 2 centre of sphere.
As shown in fig. 1, the base 1 is rotatably provided with an annular slide rail 3, a rotation axis of the annular slide rail 3 passes through a sphere center of the spherical shell 2 along a vertical direction, the annular slide rail 3 is located in a vertical plane, and a center of a projection of the spherical shell 2 in the vertical plane coincides with a center of a circle of the annular slide rail 3.
As shown in fig. 1, a circular ring 31 is arranged at the bottom of the annular slide rail 3, the inner surface of the circular ring 31 is in sliding fit with the outer surface of the cylindrical block 24, and the axis of the circular ring 31 coincides with the axis of the cylindrical block 24.
As shown in fig. 2, the annular slide rail 3 is slidably provided with a slide block 4, the slide block 4 is clamped at two sides of the annular slide rail 3, a bolt is screwed on the slide block 4, and the bolt abuts against the annular slide rail 3. The light emitting device 5 is arranged on the sliding block 4, the mounting block 41 is mounted on the sliding block 4 through a bolt, the light emitting device 5 penetrates through the mounting block 41, the bolt is screwed on the mounting block 41 and abuts against the light emitting device 5, specifically, as shown in fig. 3, the mounting block 41 is shaped like a letter ']', the light emitting device 5 adopts a laser pen, the shape of the laser pen is cylindrical, the side surface of the inner side of the mounting block 41, which is close to the sliding block 4, is provided with an arc-shaped groove, the laser pen is arranged in the groove, the bolt is screwed into the mounting block 41 and abuts against the laser pen, so that the laser pen is fixed, and laser of the laser pen just shoots to the spherical center of the spherical shell 2 due to the limit of the groove.
As shown in fig. 2, the light emitted from the light emitting device 5 enters the center of the spherical shell 2 through the spherical shell 2, and the light emitted from the light emitting device 5 is parallel to the vertical surface of the annular slide rail 3.
As shown in fig. 1, the annular slide rail 3 is provided with a scale capable of marking the angle of the light emitted by the light emitting device 5, and further, the slider 4 is provided with a notch so as to observe the angle of the position of the slider 4, and the scale marks on the annular slide rail 3 can be seen through the notch.
The working principle is as follows:
in the practical application of the light reflection and refraction exploring instrument of the utility model, firstly, the base 1 is adjusted to the horizontal state, then the space of the spherical shell 2 above the observation liquid 21 is filled with smoke, the light emitting device 5 is opened, then the position of the slide block 4 on the annular slide rail 3 is adjusted, as shown in figure 4, the light emitted by the light emitting device 5 is emitted into the spherical shell 2 through the spherical shell 2, then the smoke is emitted to the spherical center of the spherical shell 2, and then the reflection and refraction occur, so as to simulate the reflection and refraction demonstration of the light, when the light is observed from different directions, the annular slide rail 3 only needs to be rotated along the vertical axis of the spherical center, the annular slide rail 3 is rotated by a specific angle, because the light emitted by the light emitting device 5 is emitted into the spherical center of the spherical shell 2 through the spherical shell 2, therefore, after the annular slide rail 3 is rotated by the specific angle, the reflection and refraction conditions of the light rays in the spherical shell 2 are the same, and compared with the prior art, the operation is more convenient, and the light reflection and refraction phenomena can be observed very conveniently.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. An optical reflection and refraction probe, comprising: the device comprises a horizontally arranged base (1), wherein a transparent and hollow spherical shell (2) is arranged on the base (1), an observation liquid (21) is arranged in the spherical shell (2), and the spherical center of the spherical shell (2) is positioned at the center of the liquid level of the observation liquid (21);
horizontal scale marks (22) capable of marking light incidence and emergent angles are arranged on the spherical shell (2), and all the horizontal scale marks (22) are positioned in different horizontal planes;
the base (1) is rotatably provided with an annular slide rail (3), the rotation axis of the annular slide rail (3) is along the vertical direction and passes through the sphere center of the spherical shell (2), the annular slide rail (3) is positioned in the vertical plane, and the center of circle of the projection of the spherical shell (2) in the vertical plane is superposed with the center of circle of the annular slide rail (3);
the annular slide rail (3) is provided with slider (4) in a sliding manner, is provided with light emission device (5) on slider (4), the light that light emission device (5) launched jets into spherical shell (2) centre of sphere through spherical shell (2), and the light that light emission device (5) launched is on a parallel with the vertical face at annular slide rail (3) place.
2. A light reflection and refraction probe according to claim 1, wherein: the bottom of the base (1) is provided with an adjustable ground foot (11).
3. A light reflection and refraction probe according to claim 1, wherein: the base (1) is provided with an upright post (12), the upright post (12) is provided with a fixed block (13), a cross rod (14) is transversely inserted into the fixed block (13), two bolts are screwed into the fixed block (13), and the two bolts respectively prop against the upright post (12) and the cross rod (14);
the cross rod (14) is provided with a pull wire (15), and the end part of the pull wire (15) is provided with a heavy hammer (16).
4. A light reflection and refraction probe according to claim 1, wherein: the horizontal scale marks (22) are circular.
5. A light reflection and refraction probe according to claim 1, wherein: the spherical shell (2) is further provided with a vertical marking (23), the vertical marking (23) is circular, and the vertical marking (23) is located in a vertical plane passing through the sphere center of the spherical shell (2).
6. A light reflection and refraction probe according to claim 1, wherein: a smoke generating device is arranged in the spherical shell (2).
7. A light reflection and refraction probe according to claim 1, wherein: the annular slide rail (3) is provided with scales capable of marking the light angle emitted by the light emitting device (5).
8. A light reflection and refraction probe according to claim 1, wherein: a cylindrical block (24) is arranged between the spherical shell (2) and the base (1), and the spherical center of the spherical shell (2) is positioned on the axis of the cylindrical block (24);
the bottom of the annular slide rail (3) is provided with a circular ring (31), the inner surface of the circular ring (31) is in sliding fit with the outer surface of the cylindrical block (24), and the axis of the circular ring (31) coincides with the axis of the cylindrical block (24).
9. A light reflection and refraction probe according to claim 1, wherein: the sliding blocks (4) are clamped on two sides of the annular sliding rail (3), bolts are screwed on the sliding blocks (4), and the bolts are propped against the annular sliding rail (3).
10. A light reflection and refraction probe according to claim 1, wherein: the light emitting device is characterized in that a mounting block (41) is arranged on the sliding block (4), the mounting block (41) is mounted on the sliding block (4) through a bolt, the light emitting device (5) penetrates through the mounting block (41), the mounting block (41) is screwed with the bolt, and the bolt abuts against the light emitting device (5).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202020114792.6U CN211264757U (en) | 2020-01-17 | 2020-01-17 | Light reflection and refraction exploration instrument |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202020114792.6U CN211264757U (en) | 2020-01-17 | 2020-01-17 | Light reflection and refraction exploration instrument |
Publications (1)
Publication Number | Publication Date |
---|---|
CN211264757U true CN211264757U (en) | 2020-08-14 |
Family
ID=71961711
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202020114792.6U Expired - Fee Related CN211264757U (en) | 2020-01-17 | 2020-01-17 | Light reflection and refraction exploration instrument |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN211264757U (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113299168A (en) * | 2021-07-27 | 2021-08-24 | 深圳市强华威智能科技有限公司 | Light reflection and refraction measuring device |
CN114216881A (en) * | 2022-01-17 | 2022-03-22 | 华中科技大学 | Device and method for judging peroxide value of vegetable oil by optical method |
-
2020
- 2020-01-17 CN CN202020114792.6U patent/CN211264757U/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113299168A (en) * | 2021-07-27 | 2021-08-24 | 深圳市强华威智能科技有限公司 | Light reflection and refraction measuring device |
CN114216881A (en) * | 2022-01-17 | 2022-03-22 | 华中科技大学 | Device and method for judging peroxide value of vegetable oil by optical method |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN211264757U (en) | Light reflection and refraction exploration instrument | |
CN207280397U (en) | Angle measurement unit | |
CN103499355B (en) | A kind of laser demarcation device calibration system | |
US3736058A (en) | Rotating reflector level rod | |
CN104167142A (en) | Multifunctional optical experiment instrument | |
CN203673732U (en) | Light refraction phenomenon demonstration teaching aid | |
CN101699216B (en) | Device for measuring length of oil sleeve pipe | |
CN105654824A (en) | Light reflection and refraction law exploration instrument and use method thereof | |
CN202855161U (en) | Spherical geometrical optics experimental instrument | |
CN108871299B (en) | Plumb benchmark speculum device | |
CN210489005U (en) | Optical refraction demonstration device for junior middle school physics teaching | |
CN211878847U (en) | Quantitative detector for light refraction law | |
CN214042790U (en) | Light refraction law tester | |
CN208400371U (en) | A kind of teaching optics instrument | |
CN202996151U (en) | Light reflection demonstration device for teaching | |
CN2929871Y (en) | Novel multifunction optical test board | |
CN209432056U (en) | A kind of sign board comprehensive detection device | |
CN104360417B (en) | A kind of lasting accuracy test equipment of photoelectric detecting system stabilized platform | |
CN211349848U (en) | Device for demonstration of physical light refraction experiment | |
CN211719138U (en) | Artificial rainbow device | |
CN201698630U (en) | Spatial light reflection experimental demonstration instrument | |
CN216081653U (en) | Capacity detection device based on optical refraction principle | |
US3612699A (en) | Apparatus for measuring the attitude of an artificial satellite on the ground | |
CN107331264B (en) | Bevel gear reflection and refraction polarization demonstrator | |
CN214705142U (en) | Optical refraction demonstration device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
GR01 | Patent grant | ||
GR01 | Patent grant | ||
CF01 | Termination of patent right due to non-payment of annual fee | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200814 Termination date: 20210117 |