CN209821579U - Outdoor digital media projection equipment convenient to dismouting - Google Patents

Outdoor digital media projection equipment convenient to dismouting Download PDF

Info

Publication number
CN209821579U
CN209821579U CN201920686727.8U CN201920686727U CN209821579U CN 209821579 U CN209821579 U CN 209821579U CN 201920686727 U CN201920686727 U CN 201920686727U CN 209821579 U CN209821579 U CN 209821579U
Authority
CN
China
Prior art keywords
rod
cloth
projection
equipment
digital media
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
CN201920686727.8U
Other languages
Chinese (zh)
Inventor
赵红阳
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.)
Shanghai University of Engineering Science
Original Assignee
Shanghai University of Engineering Science
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 Shanghai University of Engineering Science filed Critical Shanghai University of Engineering Science
Priority to CN201920686727.8U priority Critical patent/CN209821579U/en
Application granted granted Critical
Publication of CN209821579U publication Critical patent/CN209821579U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Projection Apparatus (AREA)

Abstract

The utility model discloses an outdoor digital media projection equipment convenient for disassembly and assembly, which comprises an equipment body, one end of the equipment body is provided with a foot brake type roller and a foot pad, the other end of the equipment body is provided with a handle groove, the whole projection equipment is the same as a luggage case, the equipment can be moved through the foot brake type roller and a pull rod, the equipment is convenient for carrying and moving and is convenient for outdoor use, in addition, the equipment arranges a projection cloth and a projector in the equipment, no complex bracket and parts are arranged, the projection cloth can be pulled out from a projection cloth storage groove through an electric telescopic rod, the height of the projection cloth can be adjusted, the projector can be pulled out from a projector storage groove, the projector can be quickly adjusted to the middle position of the projection cloth through a folding rod and a lifting rod, no complex assembly bracket is needed, the time is saved, the efficiency is improved, the disassembly efficiency is high, the mode is simple, and the equipment passes through the battery power supply, need not external power supply, and the flexibility is strong.

Description

Outdoor digital media projection equipment convenient to dismouting
The technical field is as follows:
the utility model relates to a digital media field specifically is an outdoor digital media projection equipment convenient to dismouting.
Background art:
digital media belongs to the category of engineering subjects, and refers to information carriers for recording, processing, transmitting, and acquiring processes in the form of binary numbers, and these carriers include digitized sensory media such as characters, graphics, images, sounds, video images, and animations, and presentation media (codes) representing these sensory media, which are collectively called logical media, and physical media for storing, transmitting, and displaying logical media.
Digital media has a wide range of applications, particularly in relation to projection devices, including projectors and projection cloths, when in projection, the position needing to be accurately found is mostly fixed at the top of the wall and can not be moved, even with a portable projection device, which is separate, it is necessary to first fix the projection cloth, and then to fix the projector in a suitable position, thereby carrying out projection, the fixation of the projection cloth and the fixation of the projector both need to be carried out by the bracket, the utility model discloses a high-speed projector, including the projecting apparatus, the projecting apparatus is used to.
The utility model has the following contents:
the utility model aims at prior art's defect, provide an outdoor digital media projection equipment convenient to dismouting to solve the problem that above-mentioned background art provided.
In order to achieve the above object, the utility model provides a following technical scheme: a digital media projection device convenient to disassemble and assemble for outdoor use comprises a device body, wherein one end of the device body is provided with a foot brake type roller and a foot pad, the other end of the device body is provided with a handle groove, a handle is fixed inside the handle groove, one side of the handle groove is provided with a control switch, the top end of the device body is provided with a projection cloth storage groove, two ends of one side of the projection cloth storage groove are respectively provided with an electric telescopic rod, the top end of the electric telescopic rod is fixed with a light screen, the middle part of the projection cloth storage groove is provided with a cloth collecting roller, the cloth collecting roller is provided with projection cloth, one end of the cloth collecting roller is provided with a micro motor, the other end of the cloth collecting roller is provided with a bearing, the bottom end of the device body is provided with a projector storage groove, a folding rod is arranged inside the projector storage groove, and one end of the folding, the both ends of case lid all are equipped with the bolt fastening hole, the top middle part of case lid is equipped with the lifter, the top of lifter is equipped with the projecting apparatus, one side of equipment body is equipped with the battery, the both sides of battery all are equipped with the pull rod.
As a preferred technical scheme of the utility model, the folding rod is connected by the first stainless steel round bar of a plurality of and second stainless steel round bar and constitutes, first stainless steel round bar with the connecting rod has all been welded to the one end of second stainless steel round bar, the middle part of connecting rod is equipped with the through-hole, first stainless steel round bar with second stainless steel round bar passes through pivot on the connecting rod links to each other.
As a preferred technical scheme of the utility model, the lifter comprises the first conical rod of a plurality of and second conical rod, first conical rod with the inside internal thread that all is equipped with in top of second conical rod, first conical rod with the bottom outside of second conical rod all is equipped with the external screw thread, first conical rod with the second conical rod passes through the screw thread and links to each other, first conical rod with second conical rod is hollow pole, second conical rod cup joints in the first conical rod.
As a preferred technical scheme of the utility model, the one end of folding rod is passed through the cardan shaft and is fixed the inside of projecting apparatus storage tank, the other end of folding rod passes through the cardan shaft and fixes on the case lid, the case lid pass through the bolt with the bolt fastening hole is fixed on the projecting apparatus storage tank.
As an optimal technical scheme of the utility model, the lifter welding is in on the case lid, the projecting apparatus passes through the bolt fastening on the top of lifter.
As an optimal technical scheme of the utility model, the service brake formula gyro wheel with the callus on the sole all passes through the bolt fastening on the shell of equipment body, the battery passes through the bolt fastening on one side shell of equipment body, the pull rod with the equipment body activity links to each other.
As an optimal technical scheme of the utility model, electric telescopic handle passes through the bolt fastening the inside of projection cloth storage tank, micro motor with the bearing passes through the bolt fastening respectively on the both ends of projection cloth storage tank, the one end of receipts cloth roller with micro motor passes through the shaft coupling and links to each other, the other end of receipts cloth roller with the bearing activity links to each other.
As an optimal technical scheme of the utility model, the screw fixation is passed through to the one end of projection cloth on the receipts cloth roller, the other end of projection cloth passes through the screw fixation and is in on the light screen, the light screen with electric telescopic handle passes through the bolt fastening and links to each other.
As an optimal technical scheme of the utility model, the battery with control switch electric connection, control switch respectively with micro motor with electric telescopic handle electric connection, micro motor's model is 60W12V positive and negative big moment of torsion direct current gear motor that just changes, electric telescopic handle's model is XTL 100's 1200MM stroke, motor 12V's small-size riser, the projector with the battery passes through connection of electric lines.
The utility model has the advantages that: this projection equipment's whole is the same with the suitcase, can remove through service brake formula gyro wheel and pull pole, be convenient for transport and removal, the outdoor use of being convenient for, and this equipment sets up projection cloth and projecting apparatus in the inside of equipment, there is not complicated support and spare part, projection cloth can be pulled out from the projection cloth storage tank through electric telescopic handle, can adjust the height of projection cloth, the projecting apparatus can be pulled out from the projection storage tank, let the middle part position that the projecting apparatus transferred to projection cloth fast through folding rod and lifter, need not complicated equipment support, save time, and the increase of efficiency, and it is efficient to dismantle, the mode is simple, equipment passes through the battery power supply, need not external power supply, high flexibility, moreover, the steam generator is simple in structure, and convenient for popularize.
Description of the drawings:
fig. 1 is a schematic view of the expanded structure of the present invention;
fig. 2 is a schematic view of the closed structure of the present invention;
fig. 3 is a schematic view of a partially developed structure of the present invention;
FIG. 4 is a schematic view of the connection structure of the folding rod of the present invention;
fig. 5 is a schematic view of the connection structure of the lifter of the present invention;
in the figure: 1. the equipment body, 2, projection cloth storage tank, 3, the light screen, 4, electric telescopic handle, 5, service brake formula gyro wheel, 6, the callus on the sole, 7, micro motor, 8, receipts cloth roller, 9, the pull rod, 10, the battery, 11, the handle, 12, the handle recess, 13, the folding rod, 1301, first stainless steel round bar, 1302, second stainless steel round bar, 1303, the connecting rod, 1304, the pivot, 14, the projector storage tank, 15, the case lid, 16, bolt fastening hole, 17, the lifter, 1701, first bell rod, 1702, second bell rod, 18, the projector, 19, projection cloth, 20, the bearing, 21, control switch.
The specific implementation mode is as follows:
the following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the protection scope of the present invention can be clearly and clearly defined.
Example 1
Referring to fig. 1-5, the present invention provides a technical solution: an outdoor digital media projection device convenient for disassembly and assembly comprises a device body 1, wherein one end of the device body 1 is provided with a foot brake type roller 5 and a foot pad 6, the other end of the device body 1 is provided with a handle groove 12, a handle 11 is fixed inside the handle groove 12, one side of the handle groove 12 is provided with a control switch 21, the top end of the device body 1 is provided with a projection cloth storage groove 2, two ends of one side of the projection cloth storage groove 2 are respectively provided with an electric telescopic rod 4, the top end of the electric telescopic rod 4 is fixed with a light screen 3, the middle part of the projection cloth storage groove 2 is provided with a cloth collecting roller 8, the cloth collecting roller 8 is provided with projection cloth 19, one end of the cloth collecting roller 8 is provided with a micro motor 7, the other end of the cloth collecting roller 8 is provided with a bearing 20, the bottom end of the device body 1 is provided with a projector storage groove 14, a folding rod 13 is arranged, both ends of case lid 15 all are equipped with bolt fastening hole 16, and the top middle part of case lid 15 is equipped with lifter 17, and the top of lifter 17 is equipped with projecting apparatus 18, and one side of equipment body 1 is equipped with battery 10, and the both sides of battery 10 all are equipped with pull rod 9.
The folding rod 13 is formed by connecting a plurality of first stainless steel round rods 1301 and second stainless steel round rods 1302, connecting rods 1303 are welded at one ends of the first stainless steel round rods 1301 and the second stainless steel round rods 1302, through holes are formed in the middle of the connecting rods 1303, and the first stainless steel round rods 1301 and the second stainless steel round rods 1302 are connected through rotating shafts 1304 on the connecting rods 1303.
The lifting rod 17 is composed of a plurality of first conical rods 1701 and second conical rods 1702, wherein the first conical rods 1701 and the second conical rods 1702 are internally provided with internal threads at the top ends, the first conical rods 1701 and the second conical rods 1702 are externally provided with external threads at the bottom ends, the first conical rods 1701 and the second conical rods 1702 are connected through threads, the first conical rods 1701 and the second conical rods 1702 are hollow rods, and the second conical rods 1702 are sleeved in the first conical rods 1701.
One end of the folding rod 13 is fixed in the projector storage groove 14 through a universal shaft, the other end of the folding rod 13 is fixed on the box cover 15 through the universal shaft, the box cover 15 is fixed on the projector storage groove 14 through a bolt and a bolt fixing hole 16, and the projector and the equipment are connected into a whole through the folding rod, so that the stability is improved.
The lifting rod 17 is welded on the box cover 15, the projector 18 is fixed on the top of the lifting rod 17 through bolts, and the height of the projector 18 can be adjusted through the lifting rod 17.
Foot brake formula gyro wheel 5 and callus on the sole 6 all pass through the bolt fastening on the shell of equipment body 1, and battery 10 passes through the bolt fastening on the shell of one side of equipment body 1, and pull rod 9 links to each other with equipment body 1 activity, utilizes foot brake formula gyro wheel 5 and pull rod 9 to realize removing and carrying.
Electric telescopic handle 4 passes through the bolt fastening in the inside of projection cloth storage tank 2, and micro motor 7 and bearing 20 pass through the bolt fastening respectively on the both ends of projection cloth storage tank 2, and the one end of receiving cloth roller 8 links to each other through the shaft coupling with micro motor 7, and the other end of receiving cloth roller 8 links to each other with the activity of bearing 20, receive and release projection cloth automatically, save time, and stability can be strong moreover.
One end of the projection cloth 19 is fixed on the cloth collecting roller 8 through screws, the other end of the projection cloth 19 is fixed on the light screen 3 through screws, the light screen 3 and the electric telescopic rod 4 are fixedly connected through bolts, the collection of the projection cloth 19 can be realized, and the phenomenon of creasing can not occur.
The storage battery 10 is electrically connected with the control switch 21, the control switch 21 is respectively electrically connected with the micro motor 7 and the electric telescopic rod 4, the model of the micro motor 7 is a 60W12V positive and negative rotation large-torque direct-current speed reducing motor, the model of the electric telescopic rod 4 is a 1200MM stroke of XTL100 and a small-sized lifter of a motor 12V, the projector 18 is connected with the storage battery 10 through an electric wire, and the micro motor 7 and the electric telescopic rod 4 are controlled to be powered on to work through the control switch 21.
The working principle is as follows: an outdoor digital media projection device convenient for disassembly and assembly, a device body 1, a projection cloth storage groove 2, a shading plate 3, an electric telescopic rod 4, a foot brake type roller 5, a foot pad 6, a micro motor 7, a cloth collecting roller 8, a pull rod 9, a storage battery 10, a handle 11, a handle groove 12, a folding rod 13, a first stainless steel round rod 1301, a second stainless steel round rod 1302, a connecting rod 1303, a rotating shaft 1304, a projector storage groove 14, a box cover 15, a bolt fixing hole 16, a lifting rod 17, a first conical rod 1701, a second conical rod 1702, a projector 18, projection cloth 19, a bearing 20 and a control switch 21, wherein when the device is carried or carried, the device body 1 is pulled out from the device body 1 through the pull rod 9, then the device body 1 is inclined, the device body 1 is moved by utilizing the foot brake type roller 5, when the device body 1 is needed to be used, the power supply of the electric telescopic rod 4 and the micro motor 7 is switched on through the control switch 21 by slightly falling the, the electric telescopic rod 4 extends the shading plate 3 out of the equipment body 1, meanwhile, the shading plate 3 pulls the projection cloth 19, the cloth collecting roller 8 is reversed under the action of the micro motor 7, so that the projection cloth 19 is pulled out of the cloth collecting roller 8, the proper height is adjusted through the electric telescopic rod 4, then the box cover 15 is detached by detaching bolts at two sides of the box cover 15, the folding rods 13 in the projector storage groove 14 are unfolded and connected into a straight line by moving the box cover 15, then the first conical rod 1701 and the second conical rod 1702 are pulled and rotated, so that the height of the lifting rod 17 is adjusted, the projector 18 is connected with the storage battery 10 by using wires, the storage battery 10 supplies power to the projector 18, the projector 18 can project images onto the projection cloth 19, after the use is finished, the electric telescopic rod 4 is controlled by the control switch 21 to slowly lower the shading plate 3, meanwhile, the micro motor 7 drives the cloth collecting roller 8 to rotate positively, the projection cloth 19 is collected and paid, the projection cloth 19 is stored in the projection cloth storage groove 2, then the first conical rod 1701 and the second conical rod 1702 are rotated, the lifting rod 17 is lowered to a proper height, the box cover 15 and the folding rod 13 form a right angle through a universal shaft at one end of the folding rod 13, then the first stainless steel round rod 1301 and the second stainless steel round rod 1302 on the folding rod 13 are directly folded through the rotating shaft 1304 on the connecting rod 1303, the bottom of the projector storage groove 14 is stored in the folding rod 13, then the box cover 15 covers the projector storage groove 14 and is fixed through bolts, the work of disassembling and placing is completed, the speed is high, the efficiency is high, and the operation is simple.
This projection equipment's whole is the same with the suitcase, can remove through service brake formula gyro wheel and pull pole, be convenient for transport and removal, the outdoor use of being convenient for, and this equipment sets up projection cloth and projecting apparatus in the inside of equipment, there is not complicated support and spare part, projection cloth can be pulled out from the projection cloth storage tank through electric telescopic handle, can adjust the height of projection cloth, the projecting apparatus can be pulled out from the projection storage tank, let the middle part position that the projecting apparatus transferred to projection cloth fast through folding rod and lifter, need not complicated equipment support, save time, and the increase of efficiency, and it is efficient to dismantle, the mode is simple, equipment passes through the battery power supply, need not external power supply, high flexibility, moreover, the steam generator is simple in structure, and convenient for popularize.
The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims (9)

1. The utility model provides an it is outdoor with digital media projection equipment convenient to dismouting, includes equipment body (1), its characterized in that: one end of the equipment body (1) is provided with a foot brake type roller (5) and a foot pad (6), the other end of the equipment body (1) is provided with a handle groove (12), a handle (11) is fixed inside the handle groove (12), one side of the handle groove (12) is provided with a control switch (21), the top end of the equipment body (1) is provided with a projection cloth storage groove (2), both ends of one side of the projection cloth storage groove (2) are provided with electric telescopic rods (4), the top end of each electric telescopic rod (4) is fixed with a light screen (3), the middle part of the projection cloth storage groove (2) is provided with a cloth collecting roller (8), the cloth collecting roller (8) is provided with projection cloth (19), one end of the cloth collecting roller (8) is provided with a micro motor (7), the other end of the cloth collecting roller (8) is provided with a bearing (20), the bottom end of the equipment body (1) is provided with a projector storage groove (14), the inside of projecting apparatus storage tank (14) is equipped with folding rod (13), the one end of folding rod (13) is equipped with case lid (15), the both ends of case lid (15) all are equipped with bolt fastening hole (16), the top middle part of case lid (15) is equipped with lifter (17), the top of lifter (17) is equipped with projecting apparatus (18), one side of equipment body (1) is equipped with battery (10), the both sides of battery (10) all are equipped with pull rod (9).
2. A removable outdoor digital media projection device as recited in claim 1, wherein: folding rod (13) are connected by a plurality of first stainless steel round bar (1301) and second stainless steel round bar (1302) and constitute, connecting rod (1303) have all been welded to the one end of first stainless steel round bar (1301) with second stainless steel round bar (1302), the middle part of connecting rod (1303) is equipped with the through-hole, first stainless steel round bar (1301) with second stainless steel round bar (1302) pass through pivot (1304) on connecting rod (1303) link to each other.
3. A removable outdoor digital media projection device as recited in claim 1, wherein: the lifting rod (17) is composed of a plurality of first conical rods (1701) and second conical rods (1702), internal threads are arranged inside the top ends of the first conical rods (1701) and the second conical rods (1702), external threads are arranged outside the bottom ends of the first conical rods (1701) and the second conical rods (1702), the first conical rods (1701) and the second conical rods (1702) are connected through threads, the first conical rods (1701) and the second conical rods (1702) are hollow rods, and the second conical rods (1702) are sleeved in the first conical rods (1701).
4. A removable outdoor digital media projection device as recited in claim 1, wherein: one end of the folding rod (13) is fixed in the projector storage groove (14) through a universal shaft, the other end of the folding rod (13) is fixed on the box cover (15) through the universal shaft, and the box cover (15) is fixed on the projector storage groove (14) through a bolt and a bolt fixing hole (16).
5. A removable outdoor digital media projection device as recited in claim 1, wherein: the lifting rod (17) is welded on the box cover (15), and the projector (18) is fixed on the top of the lifting rod (17) through bolts.
6. A removable outdoor digital media projection device as recited in claim 1, wherein: footbrake formula gyro wheel (5) with callus on the sole (6) all pass through the bolt fastening on the shell of equipment body (1), battery (10) pass through the bolt fastening on the shell of one side of equipment body (1), pull rod (9) with equipment body (1) activity links to each other.
7. A removable outdoor digital media projection device as recited in claim 1, wherein: electric telescopic handle (4) pass through the bolt fastening in the inside of projection cloth storage tank (2), micro motor (7) with bearing (20) pass through the bolt fastening respectively on the both ends of projection cloth storage tank (2), the one end of receipts cloth roller (8) with micro motor (7) pass through the shaft coupling and link to each other, the other end of receipts cloth roller (8) with bearing (20) activity links to each other.
8. A removable outdoor digital media projection device as recited in claim 1, wherein: one end of the projection cloth (19) is fixed on the cloth collecting roller (8) through a screw, the other end of the projection cloth (19) is fixed on the light screen (3) through a screw, and the light screen (3) is fixedly connected with the electric telescopic rod (4) through a bolt.
9. A removable outdoor digital media projection device as recited in claim 1, wherein: battery (10) with control switch (21) electric connection, control switch (21) respectively with micro motor (7) with electric telescopic handle (4) electric connection, the model of micro motor (7) is 60W12V positive and negative big moment of torsion direct current gear motor, the model of electric telescopic handle (4) is XTL 100's 1200MM stroke, motor 12V's small-size riser, projector (18) with battery (10) pass through the connection of electric lines.
CN201920686727.8U 2019-05-09 2019-05-09 Outdoor digital media projection equipment convenient to dismouting Expired - Fee Related CN209821579U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920686727.8U CN209821579U (en) 2019-05-09 2019-05-09 Outdoor digital media projection equipment convenient to dismouting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920686727.8U CN209821579U (en) 2019-05-09 2019-05-09 Outdoor digital media projection equipment convenient to dismouting

Publications (1)

Publication Number Publication Date
CN209821579U true CN209821579U (en) 2019-12-20

Family

ID=68883608

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201920686727.8U Expired - Fee Related CN209821579U (en) 2019-05-09 2019-05-09 Outdoor digital media projection equipment convenient to dismouting

Country Status (1)

Country Link
CN (1) CN209821579U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113443263A (en) * 2020-03-24 2021-09-28 辽宁工业大学 Portable digital media containing box
CN117369205A (en) * 2023-11-07 2024-01-09 德鲁格电子科技(南京)有限公司 Portable mobile KTV (KTV) equipment

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113443263A (en) * 2020-03-24 2021-09-28 辽宁工业大学 Portable digital media containing box
CN113443263B (en) * 2020-03-24 2022-11-25 辽宁工业大学 Portable digital media containing box
CN117369205A (en) * 2023-11-07 2024-01-09 德鲁格电子科技(南京)有限公司 Portable mobile KTV (KTV) equipment
CN117369205B (en) * 2023-11-07 2024-03-29 德鲁格电子科技(南京)有限公司 Portable mobile KTV (KTV) equipment

Similar Documents

Publication Publication Date Title
CN209821579U (en) Outdoor digital media projection equipment convenient to dismouting
CN105523310B (en) A kind of collapsible hopper dragging support
CN201047037Y (en) Push-pull hand crank for lifting clothes hanger
CN209786643U (en) Stringing device for electric power construction
CN210667543U (en) A advertisement machine for market
CN208488369U (en) A kind of friction coefficient testing car label amplifying device
CN113521414A (en) Thoracic closed drainage bottle fixing device
CN214405475U (en) Shooting device capable of automatically adjusting height and angle for digital media
CN208714762U (en) A kind of novel English teaching equipment
CN209161192U (en) Foot-operated cable collection device is adjusted
CN213606998U (en) Shoulder arthroscopic surgery traction device
CN207541384U (en) A kind of background Display Rack and background cloth display systems
CN201205953Y (en) Folding electric bicycle
CN205931241U (en) Portable unmanned aerial vehicle
CN205626930U (en) Automatic ball machine of portable compact
CN110263701A (en) Recognition of face intelligent integrated machine
CN210821625U (en) Dress designing drawing board
CN209177647U (en) Loose adhesive tape device
CN210760691U (en) Vehicle body cleaning device
CN213009226U (en) A storage device for shock attenuation gasbag
CN111214899A (en) Dust collecting equipment convenient to maintain
CN213948478U (en) Library's books carrier
CN216133294U (en) Wisdom city planning design display device
CN209512418U (en) A kind of mushroom collection tanning device
CN216387732U (en) Movable frame projection screen

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20191220

Termination date: 20200509

CF01 Termination of patent right due to non-payment of annual fee