CN211632383U - Physics teaching aid cabinet convenient to adjust - Google Patents

Physics teaching aid cabinet convenient to adjust Download PDF

Info

Publication number
CN211632383U
CN211632383U CN201922391824.7U CN201922391824U CN211632383U CN 211632383 U CN211632383 U CN 211632383U CN 201922391824 U CN201922391824 U CN 201922391824U CN 211632383 U CN211632383 U CN 211632383U
Authority
CN
China
Prior art keywords
driving
lead screw
seat
vertical
teaching aid
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
Application number
CN201922391824.7U
Other languages
Chinese (zh)
Inventor
丁福林
高枣娣
莫远妹
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.)
Anhui Chunyue Science And Education Equipment Co ltd
Original Assignee
Anhui Chunyue Science And Education Equipment 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 Anhui Chunyue Science And Education Equipment Co ltd filed Critical Anhui Chunyue Science And Education Equipment Co ltd
Priority to CN201922391824.7U priority Critical patent/CN211632383U/en
Application granted granted Critical
Publication of CN211632383U publication Critical patent/CN211632383U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Transmission Devices (AREA)

Abstract

The utility model discloses a physics teaching aid cabinet convenient to adjust, place board, riser, threaded rod, the cabinet body, baffle, second step motor, second lead screw, electric putter, push pedal, nut, change, gear box, pinion, gear wheel, horizontal spout, electro-magnet and second band pulley including install bin, first step motor, first lead screw, first band pulley, guide arm, perpendicular spout, second drive seat, gag lever post, first drive seat, cassette, slide, iron. The utility model discloses can be better take physical utensil, so avoided the operation of staff ascending a height, very big improvement the security, also very big reduction staff's working strength simultaneously, improved the efficiency of taking; the fixing device has the advantages that the physical appliance can be better fixed, the falling off caused by shaking of the physical appliance is avoided, the stability is greatly improved, and meanwhile, the practicability is also greatly improved.

Description

Physics teaching aid cabinet convenient to adjust
Technical Field
The utility model relates to a physics teaching aid cabinet specifically is a physics teaching aid cabinet convenient to adjust, belongs to the physics technical field.
Background
At present, physical experiments are key contents of high school physics teaching, are basic experiment operation skills which must be mastered by high school students, and are one of hot spots of college entrance examination in all years.
Present physics teaching aid cabinet is fixed mostly, when taking the physics utensil of eminence, need ascend a height with the help of stool or ladder and take, so the security is lower, need other people to right steady stool or ladder, so very big improvement staff's working strength, when depositing the physics utensil in addition, stability is relatively poor, when the teaching aid cabinet rocks, cause dropping of physics utensil very easily and cause the damage, thereby very big reduction work efficiency. Therefore, provide a physics teaching aid cabinet convenient to adjust to above-mentioned problem.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a physics teaching aid cabinet convenient to adjust for solving above-mentioned problem.
The utility model realizes the above purpose by the following technical proposal, a physical teaching aid cabinet convenient for adjustment, which comprises a cabinet body and installation boxes arranged at the two ends of the cabinet body, the inner side of the cabinet body is provided with three iron placing plates from top to bottom in sequence, each two ends of the iron placing plates are fixedly connected with sliding plates, each bottom end of the iron placing plate is fixedly connected with symmetrically arranged vertical plates, two vertical plates are fixedly connected through a threaded rod arranged between the two vertical plates, the surface of the threaded rod is in threaded connection with a plurality of nuts, the nuts are rotationally connected with a rotating ring through bearings arranged on the surfaces of the nuts, the top end of the rotating ring is fixedly connected with a gear box, the top end of the gear box is fixedly connected with a baffle plate, the baffle plate penetrates through a guide groove arranged at the top end of the iron placing plate and extends to the upper part of the iron placing plate, the utility model discloses a horizontal adjustment subassembly that the board was placed at the horizontal direction removal is placed to cabinet internal side wall, install the iron and place the horizontal adjustment subassembly that the board removed at the horizontal direction, the installation box lateral wall has been seted up perpendicular spout, erect spout inside wall from the top down and seted up three horizontal spout in proper order, and slide and horizontal spout sliding fit, one of them first step motor and second step motor, every are installed in proper order after to in the installation box inner chamber from the front the installation box inner chamber is installed a set of vertical adjusting part that drives the slide and remove at vertical direction and is carried out spacing subassembly to the slide position after to the front, and vertical adjusting part's power input end and first step motor drive end are connected, spacing subassembly's power input end and second step motor drive end are connected.
Preferably, the rotation adjusting component comprises a pinion and a gearwheel, the pinion is arranged on a rotating shaft which is in running fit with the inner side wall of the installation box, the gearwheel is arranged on a nut, and the gearwheel is meshed with the pinion.
Preferably, the horizontal adjusting component comprises electric putter, electro-magnet and the push pedal that the level set up, electric putter installs on the inside wall of the cabinet body, the push pedal is installed and is served at electric putter's flexible, and the board is located same horizontal plane with iron placing to the push pedal, the electro-magnet is installed in the push pedal.
Preferably, every group vertical adjusting part comprises the first lead screw, first band pulley, first drive seat and the cassette of vertical setting, first lead screw top and install bin inner chamber top normal running fit, wherein a set of first lead screw bottom is connected with first step motor drive end, and another group first lead screw bottom and install bin inner chamber bottom normal running fit, first drive seat threaded connection is on first lead screw, and the cassette is installed on first drive seat, and the draw-in groove on the cassette is corresponding with the slide, and the cassette is corresponding with perpendicular spout, first band pulley is installed on first lead screw, and is two sets of first band pulley is connected through the belt transmission that sets up in the middle of first band pulley.
Preferably, every group spacing subassembly comprises second lead screw, second band pulley, three second drive seat and the three gag lever post of vertical setting, second lead screw top and install bin inner chamber top normal running fit, one of them is a set of second lead screw bottom is connected with second step motor drive end, and another group second lead screw bottom and install bin inner chamber bottom normal running fit, three second drive seat from the top down threaded connection in proper order on the second lead screw, every the gag lever post is installed on first drive seat, and the gag lever post cooperates with the spacing hole joint of seting up on the slide, the second band pulley is installed on the second lead screw, and is two sets of the second band pulley is connected through the belt drive that sets up in the middle of the second band pulley.
Preferably, two guide rods are installed at the top end of the inner cavity of each installation box, one guide rod is in sliding fit with the second driving seat, and the other guide rod is in sliding fit with the first driving seat.
The utility model has the advantages that:
1. through setting up the mutual cooperation between cassette, lead screw, drive seat, perpendicular spout, push pedal and the gag lever post, can be better take physical utensil, so avoided the staff operation of ascending a height, very big improvement the security, simultaneously also very big reduction staff's working strength, improved the efficiency of taking.
2. Through setting up mutually supporting between gear, baffle, gear box, threaded rod, nut and the change, can be better fix the physics utensil, avoided the physics utensil to cause because of rocking to drop, very big improvement stability, simultaneously also very big improvement the practicality.
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 drawings without inventive exercise.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the overall rear view structure of the present invention;
FIG. 3 is a schematic side view of the installation box of the present invention;
FIG. 4 is a schematic view of the vertical chute and the horizontal chute of the present invention;
fig. 5 is a schematic view of a part of an enlarged structure of fig. 1 according to the present invention.
In the figure: 1. the installation box, 2, first step motor, 3, first lead screw, 4, first band pulley, 5, guide arm, 6, vertical chute, 7, second drive seat, 8, gag lever post, 9, first drive seat, 10, cassette, 11, slide, 12, iron place the board, 13, riser, 14, threaded rod, 15, the cabinet body, 16, baffle, 17, second step motor, 18, second lead screw, 19, electric putter, 20, push pedal, 21, nut, 22, swivel, 23, gear box, 24, pinion, 25, gear wheel, 26, horizontal chute, 27, electro-magnet, 28, second band pulley.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the embodiments described below are only some embodiments of the present invention, but 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.
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Referring to fig. 1-5, a physics teaching aid cabinet convenient to adjust comprises a cabinet body 15 and installation boxes 1 installed at two ends of the cabinet body 15, wherein three iron placing plates 12 are sequentially arranged at the inner side of the cabinet body 15 from top to bottom, two ends of each iron placing plate 12 are fixedly connected with sliding plates 11, the bottom end of each iron placing plate 12 is fixedly connected with symmetrically arranged vertical plates 13, the two vertical plates 13 are fixedly connected through a threaded rod 14 arranged between the two vertical plates 13, the surface of the threaded rod 14 is in threaded connection with a plurality of nuts 21, the nuts 21 are rotatably connected with a rotating ring 22 through bearings installed on the surface of the nuts 21, the top end of the rotating ring 22 is fixedly connected with a gear box 23, the top end of the gear box 23 is fixedly connected with a baffle 16, and the baffle 16 penetrates through a guide groove arranged at the top end of the iron placing plate 12 and extends to the position above, a rotary adjusting component for driving the nut 21 to rotate is arranged in the inner cavity of the gear box 23, a horizontal adjusting component for driving the iron placing plate 12 to move in the horizontal direction is arranged on the inner side wall of the cabinet body 15, the side wall of the installation box 1 is provided with a vertical chute 6, the inner side wall of the vertical chute 6 is provided with three transverse chutes 26 from top to bottom in sequence, and the sliding plate 11 is in sliding fit with the transverse chutes 26, a first stepping motor 2 and a second stepping motor 17 are sequentially arranged in the inner cavity of one of the installation boxes 1 from front to back, a group of vertical adjusting components for driving the sliding plate 11 to move in the vertical direction and a limiting component for limiting the position of the sliding plate 11 are sequentially arranged in the inner cavity of each installation box 1 from front to back, and the power input end of the vertical adjusting component is connected with the driving end of the first stepping motor 2, and the power input end of the limiting component is connected with the driving end of the second stepping motor 17.
The rotation adjusting assembly consists of a small gear 24 and a large gear 25, the small gear 24 is arranged on a rotating shaft which is in rotating fit with the inner side wall of the installation box 1, the large gear 25 is arranged on the nut 21, and the large gear 25 is meshed with the small gear 24; the horizontal adjusting assembly comprises an electric push rod 19, an electromagnet 27 and a push plate 20 which are horizontally arranged, the electric push rod 19 is installed on the inner side wall of the cabinet body 15, the push plate 20 is installed on the telescopic end of the electric push rod 19, the push plate 20 and the iron placing plate 12 are located on the same horizontal plane, and the electromagnet 27 is installed on the push plate 20, so that the iron placing plate 12 can be better subjected to magnetic adsorption, and the iron placing plate 12 can be reset; each group of vertical adjusting assemblies consists of a first lead screw 3, a first belt wheel 4, a first driving seat 9 and a clamping seat 10 which are vertically arranged, the top end of the first lead screw 3 is in running fit with the top end of an inner cavity of the installation box 1, the bottom end of one group of the first lead screw 3 is connected with the driving end of a first stepping motor 2, the bottom end of the other group of the first lead screw 3 is in running fit with the bottom end of the inner cavity of the installation box 1, the first driving seat 9 is in threaded connection with the first lead screw 3, the clamping seat 10 is installed on the first driving seat 9, a clamping groove in the clamping seat 10 corresponds to the sliding plate 11, the clamping seat 9 is convenient to be better in clamping fit with the sliding plate 11 to support the sliding plate 11, the clamping seat 10 corresponds to the vertical sliding groove 6, the first belt wheel 4 is installed on the first lead screw 3, and the two groups of the first belt; each group of limiting components consists of a second lead screw 18, a second belt wheel 28, three second driving seats 7 and three limiting rods 8 which are vertically arranged, the top end of the second lead screw 18 is in running fit with the top end of the inner cavity of the installation box 1, wherein the bottom end of one group of the second lead screws 18 is connected with the driving end of a second stepping motor 17, the bottom end of the other group of the second lead screws 18 is in running fit with the bottom end of the inner cavity of the installation box 1, the three second driving seats 7 are sequentially in threaded connection with the second lead screws 18 from top to bottom, each limiting rod 8 is installed on the first driving seat 9, and the limiting rod 8 is matched with a limiting hole arranged on the sliding plate 11 in a clamping way, so that the position of the sliding plate 11 is better limited, the sliding of the sliding plate 11 is avoided, the second belt wheels 28 are mounted on the second lead screw 18, and the two groups of second belt wheels 28 are in transmission connection through a belt arranged in the middle of the second belt wheels 28; every two guide bars are installed on 1 inner chamber top of install bin, and one of them guide bar and second drive 7 sliding fit of seat, another guide bar and first drive 9 sliding fit of seat, be convenient for better inject first drive seat 9 and second drive 7 positions of seat, avoid the rotation of first drive seat 7 and second drive seat 9.
When the utility model is used, the electric elements appearing in the application are externally connected with a communication power supply and a control switch when in use, when the physical appliance on the iron placing plate 12 is clamped, firstly, the physical appliance is placed on the iron placing plate 12, then the rotating shaft is rotated, the rotating shaft is driven to rotate by the nut 21 through the pinion 24 and the gearwheel 25, the rotating nut 21 is driven to move on the threaded rod 14, the nut 21 drives the baffle 16 to move towards the physical appliance through the gear box 23 through the rotating ring 22, and the baffle 16 is contacted with the physical appliance, thereby completing the clamping of the physical appliance; when a physical appliance on an iron placing plate 12 is taken down, a first stepping motor 2 is firstly started, a driving end of the first stepping motor 2 drives a clamping seat 10 to move in the vertical direction through a first screw rod 3 and a first driving seat 9, when the clamping seat 10 moves to the same horizontal plane as the iron placing plate 12 needing to move, a second stepping motor 17 is then started, a driving end of the second stepping motor 17 drives a limiting rod 8 to move downwards through a second screw rod 18 and a second driving seat 7, so that the limiting rod 8 is separated from a sliding plate 11, an electric push rod 19 corresponding to the iron placing plate 12 needing to move is then started, the electric push rod 19 drives a push plate 20 to move towards the iron placing plate 12, the push plate 20 moves to the iron placing plate 12 to be contacted and pushed, so that the iron placing plate 12 drives the sliding plate 11 to move into a clamping groove formed in the clamping seat 10, and then the first stepping motor 2 is started, make the drive end of first step motor 2 drive cassette 10 downstream through first lead screw 3 and first drive seat 9, make cassette 10 drive iron through slide 11 and place board 12 downstream, place board 12 and drive the physics utensil and remove to corresponding position after iron, take off the physics utensil again to accomplish taking to the physics utensil.
The first stepping motor 2 and the second stepping motor 17 are both YVP90L-4 stepping motors sold by suma motor ltd of Nanjing, and supporting circuits thereof can be provided by merchants.
The electric push rod 19 adopts a DTII electric push rod provided by Youth electromechanical device, Inc. of Yangzhou, and a matched power supply and circuit thereof.
It is well within the skill of those in the art to implement, without undue experimentation, the present invention does not relate to software and process improvements, as related to circuits and electronic components and modules.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; 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 (6)

1. The utility model provides a physics teaching aid cabinet convenient to adjust, includes the cabinet body (15) and installs install bin (1) at the cabinet body (15) both ends, its characterized in that: the cabinet body (15) is characterized in that the inner side of the cabinet body (15) is sequentially provided with three iron placing plates (12) from top to bottom, each iron placing plate (12) is provided with a sliding plate (11) at two ends, each iron placing plate (12) is provided with a vertical plate (13) which is symmetrically arranged at the bottom end of the iron placing plate (12), the two vertical plates (13) are fixedly connected through a threaded rod (14) arranged between the two vertical plates (13), the surface of the threaded rod (14) is in threaded connection with a plurality of nuts (21), the nuts (21) are rotatably connected with a rotating ring (22) through bearings arranged on the surfaces of the nuts (21), the top end of the rotating ring (22) is fixedly connected with a gear box (23), the top end of the gear box (23) is fixedly connected with a baffle (16), and the baffle (16) penetrates through a guide groove arranged at the top, the inner cavity of the gear box (23) is provided with a rotary adjusting component for driving a nut (21) to rotate, the inner side wall of the cabinet body (15) is provided with a horizontal adjusting component for driving iron to place a plate (12) to move in the horizontal direction, the side wall of the installation box (1) is provided with a vertical sliding groove (6), the inner side wall of the vertical sliding groove (6) is sequentially provided with three horizontal sliding grooves (26) from top to bottom, a sliding plate (11) is in sliding fit with the horizontal sliding grooves (26), one of the installation box (1) is sequentially provided with a first stepping motor (2) and a second stepping motor (17) from front to back, each installation box (1) is sequentially provided with a group of vertical adjusting components for driving the sliding plate (11) to move in the vertical direction and a limiting component for limiting the position of the sliding plate (11), and the power input end of the vertical adjusting component is connected with the driving end of the first stepping motor (, and the power input end of the limiting assembly is connected with the driving end of a second stepping motor (17).
2. A physics teaching aid cabinet convenient to adjust according to claim 1, characterized in that: the rotation adjusting assembly is composed of a small gear (24) and a large gear (25), the small gear (24) is installed on a rotating shaft matched with the inner side wall of the installation box (1) in a rotating mode, the large gear (25) is installed on the nut (21), and the large gear (25) is meshed with the small gear (24).
3. A physics teaching aid cabinet convenient to adjust according to claim 1, characterized in that: horizontal adjustment subassembly comprises electric putter (19), electro-magnet (27) and push pedal (20) that the level set up, electric putter (19) are installed on the inside wall of the cabinet body (15), the flexible of electric putter (19) is served in push pedal (20) is installed, and push pedal (20) and iron place board (12) and be located same horizontal plane, install on push pedal (20) electro-magnet (27).
4. A physics teaching aid cabinet convenient to adjust according to claim 1, characterized in that: each group of vertical adjusting components consists of a first lead screw (3), a first belt wheel (4), a first driving seat (9) and a clamping seat (10) which are vertically arranged, the top end of the first lead screw (3) is rotationally matched with the top end of the inner cavity of the installation box (1), wherein the bottom end of one group of the first lead screws (3) is connected with the driving end of the first stepping motor (2), and the bottom end of the other group of the first lead screws (3) is in running fit with the bottom end of the inner cavity of the installation box (1), the first driving seat (9) is connected with the first lead screw (3) in a threaded manner, the clamping seat (10) is arranged on the first driving seat (9), the clamping groove on the clamping seat (10) corresponds to the sliding plate (11), the clamping seat (10) corresponds to the vertical sliding groove (6), the first belt wheels (4) are installed on the first lead screw (3), and the two groups of first belt wheels (4) are in transmission connection through a belt arranged in the middle of the first belt wheels (4).
5. A physics teaching aid cabinet convenient to adjust according to claim 1, characterized in that: each group of limiting components consists of a second lead screw (18), a second belt wheel (28), three second driving seats (7) and three limiting rods (8) which are vertically arranged, the top end of the second lead screw (18) is in running fit with the top end of the inner cavity of the installation box (1), wherein the bottom end of one group of the second lead screws (18) is connected with the driving end of a second stepping motor (17), the bottom end of the other group of second screw rods (18) is in running fit with the bottom end of the inner cavity of the installation box (1), the three second driving seats (7) are sequentially in threaded connection with the second screw rods (18) from top to bottom, each limiting rod (8) is installed on the first driving seat (9), and the limiting rod (8) is matched with a limiting hole arranged on the sliding plate (11) in a clamping way, the second belt wheels (28) are mounted on the second lead screw (18), and the two groups of second belt wheels (28) are in transmission connection through a belt arranged in the middle of the second belt wheels (28).
6. A physics teaching aid cabinet convenient to adjust according to claim 4 or 5, characterized by: every two guide bars are installed on installation case (1) inner chamber top, and one of them guide bar and second drive seat (7) sliding fit, another guide bar and first drive seat (9) sliding fit.
CN201922391824.7U 2019-12-26 2019-12-26 Physics teaching aid cabinet convenient to adjust Expired - Fee Related CN211632383U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201922391824.7U CN211632383U (en) 2019-12-26 2019-12-26 Physics teaching aid cabinet convenient to adjust

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201922391824.7U CN211632383U (en) 2019-12-26 2019-12-26 Physics teaching aid cabinet convenient to adjust

Publications (1)

Publication Number Publication Date
CN211632383U true CN211632383U (en) 2020-10-09

Family

ID=72699740

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201922391824.7U Expired - Fee Related CN211632383U (en) 2019-12-26 2019-12-26 Physics teaching aid cabinet convenient to adjust

Country Status (1)

Country Link
CN (1) CN211632383U (en)

Similar Documents

Publication Publication Date Title
CN110792892A (en) Rotary shooting device
CN207975409U (en) A kind of large-size screen monitors regulating device
CN211632383U (en) Physics teaching aid cabinet convenient to adjust
CN203954556U (en) The multifunctional motor-driven treadmill that can generate electricity
CN211885172U (en) Abdominal muscle training frame
CN214312096U (en) Box for placing projector
CN209919707U (en) Novel protection of electrical component device
CN215577114U (en) Real operation platform of instructing of thing networking teaching convenient to adjust
CN212018424U (en) Paint drying device of wooden toy
CN115139269A (en) Virtual realization system computer equipment intelligence auxiliary device
CN210207025U (en) Grinder of traditional chinese medicine
CN210520624U (en) Product display device for art design
CN212933796U (en) Think political affairs projection arrangement for training
CN215603897U (en) Interactive game development collaborative manufacturing platform tool
CN209734828U (en) Track and field competition bracing piece with rotary mechanism
CN209204630U (en) A kind of firm organization of mystery precious deposits game machine
CN110185892B (en) Operation and maintenance data collection device
CN211245324U (en) Jumping stand is used in sports training
CN219921951U (en) Dorsum muscle combined training device
CN218044485U (en) Double-projection intelligent computer learning table
CN213527318U (en) Leg pressing device for physical education
CN211123776U (en) Device for simulating three-axis attitude stability of satellite
CN210241317U (en) Lighting lamp for classroom
CN219795963U (en) Effectual supporting structure shocks resistance
CN218408201U (en) Bearing convenient to assemble

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: 20201009

Termination date: 20211226