CN113187347A - Intelligent self-opening and self-closing indoor door - Google Patents

Intelligent self-opening and self-closing indoor door Download PDF

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Publication number
CN113187347A
CN113187347A CN202110471492.2A CN202110471492A CN113187347A CN 113187347 A CN113187347 A CN 113187347A CN 202110471492 A CN202110471492 A CN 202110471492A CN 113187347 A CN113187347 A CN 113187347A
Authority
CN
China
Prior art keywords
door
opening
fixed
rear end
bent axle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110471492.2A
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Chinese (zh)
Inventor
王杰
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.)
Shandong Liyu Furniture Co ltd
Original Assignee
Shandong Liyu Furniture 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 Shandong Liyu Furniture Co ltd filed Critical Shandong Liyu Furniture Co ltd
Priority to CN202110471492.2A priority Critical patent/CN113187347A/en
Publication of CN113187347A publication Critical patent/CN113187347A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06BFIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/32Arrangements of wings characterised by the manner of movement; Arrangements of movable wings in openings; Features of wings or frames relating solely to the manner of movement of the wing
    • E06B3/34Arrangements of wings characterised by the manner of movement; Arrangements of movable wings in openings; Features of wings or frames relating solely to the manner of movement of the wing with only one kind of movement
    • E06B3/36Arrangements of wings characterised by the manner of movement; Arrangements of movable wings in openings; Features of wings or frames relating solely to the manner of movement of the wing with only one kind of movement with a single vertical axis of rotation at one side of the opening, or swinging through the opening
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05FDEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00Power-operated mechanisms for wings
    • E05F15/60Power-operated mechanisms for wings using electrical actuators
    • E05F15/603Power-operated mechanisms for wings using electrical actuators using rotary electromotors
    • E05F15/611Power-operated mechanisms for wings using electrical actuators using rotary electromotors for swinging wings
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05FDEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00Power-operated mechanisms for wings
    • E05F15/70Power-operated mechanisms for wings with automatic actuation
    • E05F15/73Power-operated mechanisms for wings with automatic actuation responsive to movement or presence of persons or objects
    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06BFIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B7/00Special arrangements or measures in connection with doors or windows
    • E06B7/02Special arrangements or measures in connection with doors or windows for providing ventilation, e.g. through double windows; Arrangement of ventilation roses
    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06BFIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B7/00Special arrangements or measures in connection with doors or windows
    • E06B7/28Other arrangements on doors or windows, e.g. door-plates, windows adapted to carry plants, hooks for window cleaners
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D9/00Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/10Combinations of wind motors with apparatus storing energy
    • F03D9/11Combinations of wind motors with apparatus storing energy storing electrical energy
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/72Wind turbines with rotation axis in wind direction
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E70/00Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30Systems combining energy storage with energy generation of non-fossil origin

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  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power-Operated Mechanisms For Wings (AREA)

Abstract

The invention discloses an intelligent self-opening and self-closing indoor door which comprises a door frame, a door plate, a door lock, an infrared detection device, a control panel and a ventilation window, wherein the door frame is of an arch structure, the door plate is fixedly hinged inside the door frame, the middle part of the left side of the front end surface of the door plate is provided with the door lock and is fixed through a bolt, the top end of the door lock is provided with embedded infrared detection devices which are symmetrically distributed, the top part of the right end of each infrared detection device is provided with the control panel, and the top end of the control panel is provided with the ventilation window which is symmetrically distributed. According to the invention, through a reasonable design, the opening and closing of the door panel are intelligently sensed and identified through the five infrared detection devices, and wind power generation is carried out through airflow in the opening and closing process, so that energy is saved, and meanwhile, indoor heat preservation can be carried out by blocking airflow flow through the sealing device in a winter environment.

Description

Intelligent self-opening and self-closing indoor door
Technical Field
The invention relates to an indoor door, in particular to an intelligent self-opening and self-closing indoor door.
Background
Along with the progress and development of science and technology, various electric switch doors are available on the market, but the electric switch door used at present often causes the waste of kinetic energy in the use process and the single transmission structure is easy to damage, so that a novel intelligent self-opening and closing indoor door which can make full use of the kinetic energy advantage to save energy and has a stable transmission structure is needed.
Disclosure of Invention
The invention aims to provide an intelligent self-opening and self-closing indoor door to solve the technical problem.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides an intelligent indoor door that opens and shuts certainly, includes door frame, door plant, lock, infrared detection device, control panel, ventilation window, the door frame is fixed with the door plant for domes and inside articulated, the positive terminal surface left side mid-mounting of door plant has the lock and passes through the bolt fastening, the infrared detection device of embedded symmetric distribution is installed on the lock top, control panel is installed at infrared detection device right-hand member top, the ventilation window of symmetric distribution is installed on the control panel top.
On the basis of the technical scheme, door plant internally mounted has bearing structure, sealing device, wind power generation set, integrated control case, lithium cell group, device, aggregate unit that opens and shuts, door plant internally mounted has bearing structure and rear end face surface top to install sealing device, symmetrical formula wind power generation set is installed to the sealing device front end, wind power generation set passes through the electric wire and is connected with the integrated control case of bottom, the integrated control case passes through the electric wire and is connected with the lithium cell group of bottom, lithium cell group passes through the aggregate unit of fix with screw and through the electric wire connection device that opens and shuts rear end.
On the basis of the technical scheme, the opening and closing device comprises a shell, a fixing frame, a swinging device, a resetting device and a transmission device, wherein the fixing frame is arranged at the bottom of the four sides of the shell in a rectangular structure, the fixing frame is fixed by screws, the swinging device is arranged on the left side of the top end of the fixing frame, the resetting device is arranged on the left side and the right side of the swinging device, and the transmission device is arranged at the right end of the resetting device and connected through meshing.
On the basis of the technical scheme, the linkage device comprises a driving motor, a fixed box, a crankshaft front end, a connecting rod, a cross bolt and a crankshaft rear end, the driving motor is installed at the bottom end of the inner side of the fixed box, a bearing and the crankshaft front end are installed on the inner side of the fixed box, the connecting rod is installed on the circumferential surface of the crankshaft front end, and the crankshaft front end is fixedly connected with the crankshaft rear end on the top end through the cross bolt.
On the basis of the technical scheme, the swinging device comprises a connecting rod, a rotary table, a convex plate, a bearing and a base, wherein the connecting rod is fixed on the top end of the rotary table through threaded connection, the surface of the rotary table is provided with the integrated convex plate and the bottom of the integrated convex plate is hinged and fixed with the base through the bearing, the base is arranged on the top end of a fixed frame through bolts, the convex plate is connected with the reset cams on two sides in a sliding mode, the rear end of the reset cam is provided with a turbine and is fixed through key connection, and the rear end of the turbine is provided with a fixed flange plate and is fixed through bolts.
On the basis of the technical scheme, the transmission device comprises a worm, a transmission rod, a gear, a driven gear, a driving gear, a transmission rubber disc and a transmission wheel, the worm is installed at the bottom of the turbine and is connected through meshing, the transmission rod is installed on the inner side of the worm and is fixed through key connection, the gear is installed at the right end of the transmission rod and is connected with the driven gear on one side in a meshing manner, the driven gear is connected with the driving gear on one side in a meshing manner, the right end of the driven gear is provided with the transmission rubber wheel, and the transmission wheel is installed at the top end of the transmission rubber wheel.
Compared with the prior art, the invention has the following advantages: according to the invention, the wind power generation device is arranged in the door plate, so that the airflow in the rotation process of the door plate can be fully utilized to generate power, the utilization efficiency of energy is effectively improved, the use cost is reduced, meanwhile, the three opening and closing devices are synchronously controlled through the linkage device, the remaining opening and closing devices can still work when the opening and closing devices are damaged, and the service life of the product is effectively prolonged.
Drawings
Fig. 1 is a schematic view of the external structure of the present invention.
FIG. 2 is a schematic view of an internal structure of a door panel according to the present invention.
Fig. 3 is a schematic structural view of the opening and closing device of the present invention.
Fig. 4 is a schematic structural diagram of a swing device according to the present invention.
FIG. 5 is a schematic view of the transmission of the present invention.
FIG. 6 is a schematic view of a linkage according to the present invention.
In the figure: 1. door frame, 2, door panel, 3, door lock, 4, infrared detection device, 5, control panel, 6, ventilation window, 7, supporting structure, 8, sealing device, 9, wind power generation device, 10, integrated control box, 11, lithium battery pack, 12, opening and closing device, 13, linkage device, 14, shell, 15, fixing frame, 16, swinging device, 17, resetting device, 18, transmission device, 19, driving motor, 20, fixing box, 21, bearing, 22, crankshaft front end, 23, connecting rod, 24, cross bolt, 25, crankshaft rear end, 26, connecting rod, 27, rotary table, 27-1, convex plate, 28, base, 29, resetting cam, 30, turbine, 31, fixing flange disc, 32, worm, 33, transmission rod, 34, gear, 34-1, driven gear, 34-2, driving gear, 35, transmission rubber disc, 36, 34-1, driven gear, 34-2, driving gear, 35, transmission rubber disc, A driving wheel.
Detailed Description
The invention is explained in further detail below with reference to the figures and the specific embodiments.
1. As shown in fig. 1-6, an intelligent indoor door that opens and shuts certainly, including door frame 1, door plant 2, lock 3, infrared detection device 4, control panel 5, ventilation window 6, door frame 1 is fixed with door plant 2 for domes and inside articulated, 2 positive terminal surface left sides mid-mounting of door plant have lock 3 and pass through the bolt fastening, embedded symmetric distribution's infrared detection device 4 is installed on 3 tops of lock, control panel 5 is installed at 4 right-hand member tops of infrared detection device, symmetric distribution's ventilation window 6 is installed on 5 tops of control panel.
2 internally mounted of door plant has bearing structure 7, sealing device 8, wind power generation set 9, integrated control box 10, lithium cell group 11, device 12, aggregate unit 13 that opens and shuts, 2 internally mounted of door plant has bearing structure 7 and rear end face surface top to install sealing device 8, symmetrical formula wind power generation set 9 is installed to the sealing device front end, wind power generation set 9 passes through the electric wire and is connected with the integrated control box 10 of bottom, integrated control box 10 passes through the electric wire and is connected with the lithium cell group 11 of bottom, lithium cell group 11 passes through the screw fixation and just passes through aggregate unit 13 of wire connection device 12 rear end that opens and shuts.
The opening and closing device 12 comprises a shell 14, a fixing frame 15, a swinging device 16, a resetting device 17 and a transmission device 18, wherein the fixing frame 15 is arranged at the bottom of the four sides of the shell 14 and is of a rectangular structure, the swinging device 16 is arranged at the left side of the top end of the fixing frame 15 through screw fixation, the resetting device 17 is arranged at the left side and the right side of the swinging device 16, and the transmission device 18 is arranged at the right end of the resetting device 17 and is connected through meshing.
Linkage 13 includes driving motor 19, fixed case 20, bearing 21, bent axle front end 22, connecting rod 23, cross bolt 24, bent axle rear end 25, driving motor 19 installs in the inboard bottom of fixed case 20, fixed case 20 inboard is installed bearing (21) and inboard and is installed bent axle front end 22, bent axle front end 22 circumference surface mounting has connecting rod 23, bent axle front end 22 passes through cross bolt 24 and is connected fixedly with the bent axle rear end 25 on top.
Pendulous device 16 includes connecting rod 26, carousel 27, flange 27-1, bearing 21, base 28, connecting rod 26 passes through threaded connection and fixes on carousel 27 top, 27 circumference surface mounting of carousel has integral type flange 27-1 and the bottom to pass through bearing (21) and base 28 articulated fixed, base 28 passes through the bolt and installs on mount 15 top, flange 27-1 and the 29 sliding connection of the cam that resets of both sides, it is fixed that the turbine 30 is installed and through the key-type connection to reset cam 29 rear end, fixed flange dish 31 is installed and is passed through the bolt fastening to turbine 30 rear end.
Transmission 18 includes worm 32, transfer line 33, gear 34, driven gear 34-1, driving gear 34-2, transmission rubber dish 35, drive wheel 36, worm 32 is installed and is connected through the meshing in the turbine 31 bottom, worm 32 inboard is installed transfer line 33 and is fixed through the key-type connection, transfer line 33 right-hand member is installed gear 34 and is connected with the driven gear 34-1 meshing of one side, driven gear 34-1 is connected with the driving gear 34-2 meshing of one side and the right-hand member is installed transmission rubber wheel 35, drive wheel 36 is installed on transmission rubber wheel 35 top.
The working principle of the invention is as follows: can detect personnel's information and open and shut the instruction through the transmission of integrated control case and drive the door plant through aggregate unit control switching device and carry out reciprocating type swing motion, can generate electricity through wind power generation set and store in lithium cell group inside at the reciprocal in-process that opens and shuts of door plant simultaneously, sealing device when needing to keep warm in winter can be through the push-and-pull carries out isolated air current and keeps warm, the inside bent axle connection connecting rod that drives the middle part through driving motor of aggregate unit drives both sides bent axle and rotates while bent axle front end and bent axle rear end pass through bolted connection and conveniently change the maintenance, then switching device makes resetting means's positive and negative rotation make the swinging means carry out reciprocating type horizontal swing motion and drive the door plant work of opening and shutting.
The foregoing is a preferred embodiment of the present invention, and it will be apparent to those skilled in the art that variations, modifications, substitutions and alterations can be made in the embodiment without departing from the principles and spirit of the invention.

Claims (6)

1. The utility model provides an intelligent indoor door that opens and shuts certainly, includes door frame (1), door plant (2), lock (3), infrared detection device (4), control panel (5), ventilation window (6), its characterized in that: door frame (1) is fixed with door plant (2) for domes and inside articulated, door plant (2) positive terminal surface left side mid-mounting has lock (3) and passes through the bolt fastening, infrared detection device (4) of embedded symmetric distribution are installed on door lock (3) top, control panel (5) are installed at infrared detection device (4) right-hand member top, ventilation window (6) of symmetric distribution are installed on control panel (5) top.
2. The intelligent self-opening/closing indoor door of claim 1, wherein: door plant (2) internally mounted has bearing structure (7), sealing device (8), wind power generation set (9), integrated control case (10), lithium cell group (11), device (12), aggregate unit (13) open and shut, door plant (2) internally mounted has bearing structure (7) and rear end face surface top to install sealing device (8), symmetrical formula wind power generation set (9) is installed to the sealing device front end, wind power generation set (9) are connected with integrated control case (10) of bottom through the electric wire, integrated control case (10) are connected with lithium cell group (11) of bottom through the electric wire, lithium cell group (11) are through screw fixation and aggregate unit (13) of device (12) rear end that opens and shuts through the connection of electric lines.
3. The intelligent self-opening/closing indoor door of claim 1, wherein: device (12) that opens and shuts includes shell (14), mount (15), pendulous device (16), resetting means (17), transmission (18), mount (15) are installed for four sides rectangle structure and inboard bottom in shell (14), pendulous device (16) are installed through fix with screw and top left side in mount (15), resetting means (17) are installed to the pendulous device (16) left and right sides, transmission (18) and connect through the meshing are installed to resetting means (17) right-hand member.
4. The intelligent self-opening/closing indoor door of claim 1, wherein: linkage (12) include driving motor (19), fixed case (20), bearing (21), bent axle front end (22), connecting rod (23), cross bolt (24), bent axle rear end (25), driving motor (19) are installed in fixed case (20) inboard bottom, fixed case (20) inboard is installed bearing (21) and inboard and is installed bent axle front end (22), bent axle front end (22) circumference surface mounting has connecting rod (23), bent axle front end (22) are connected fixedly through cross bolt (24) and bent axle rear end (25) on top.
5. The intelligent self-opening/closing indoor door of claim 1, wherein: pendulous device (16) include connecting rod (26), carousel (27), flange (27-1), bearing (21), base (28), connecting rod (26) are fixed on carousel (27) top through threaded connection, carousel (27) circumference surface mounting has integral type flange (27-1) and bottom to pass through bearing (21) and base (28) articulated fixed, base (28) are installed on mount (15) top through the bolt, flange (27-1) and reset cam (29) sliding connection of both sides, it is fixed that turbine (30) and key-type connection are installed to reset cam (29) rear end, fixed flange dish (31) and through the bolt fastening are installed to turbine (30) rear end.
6. The intelligent self-opening/closing indoor door of claim 1, wherein: transmission (18) include worm (32), transfer line (33), gear (34), driven gear (34-1), driving gear (34-2), transmission rubber disc (35), drive wheel (36), worm (32) and through meshing connection are installed to turbine (31) bottom, worm (32) inboard is installed transfer line (33) and is fixed through the key-type connection, transfer line (33) right-hand member is installed gear (34) and is connected with driven gear (34-1) meshing of one side, driven gear (34-1) is connected with driving gear (34-2) meshing of one side and the right-hand member is installed transmission rubber wheel (35), drive wheel (36) are installed on transmission rubber wheel (35) top.
CN202110471492.2A 2021-04-29 2021-04-29 Intelligent self-opening and self-closing indoor door Pending CN113187347A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110471492.2A CN113187347A (en) 2021-04-29 2021-04-29 Intelligent self-opening and self-closing indoor door

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110471492.2A CN113187347A (en) 2021-04-29 2021-04-29 Intelligent self-opening and self-closing indoor door

Publications (1)

Publication Number Publication Date
CN113187347A true CN113187347A (en) 2021-07-30

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CN202110471492.2A Pending CN113187347A (en) 2021-04-29 2021-04-29 Intelligent self-opening and self-closing indoor door

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114783075A (en) * 2022-04-26 2022-07-22 枣庄学院 Be used for business administration attendance equipment of checking card

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201349161Y (en) * 2008-02-20 2009-11-18 吴水森 Renewable energy sources type electric generating apparatus for home
WO2010121485A1 (en) * 2009-04-21 2010-10-28 巨诺国际有限公司 Variable plane blade assembly, windmill prime mover and generation system having the blade assembly
CN103806828A (en) * 2014-01-23 2014-05-21 红门智能科技股份有限公司 Electric folding side hung door
CN205277090U (en) * 2015-12-10 2016-06-01 河南民生特种装备有限公司 Full -automatic electromagnetic shield door
CN110512996A (en) * 2019-08-27 2019-11-29 霍山知行信息科技有限公司 A kind of indoor intelligent vertical hinged door

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201349161Y (en) * 2008-02-20 2009-11-18 吴水森 Renewable energy sources type electric generating apparatus for home
WO2010121485A1 (en) * 2009-04-21 2010-10-28 巨诺国际有限公司 Variable plane blade assembly, windmill prime mover and generation system having the blade assembly
CN103806828A (en) * 2014-01-23 2014-05-21 红门智能科技股份有限公司 Electric folding side hung door
CN205277090U (en) * 2015-12-10 2016-06-01 河南民生特种装备有限公司 Full -automatic electromagnetic shield door
CN110512996A (en) * 2019-08-27 2019-11-29 霍山知行信息科技有限公司 A kind of indoor intelligent vertical hinged door

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114783075A (en) * 2022-04-26 2022-07-22 枣庄学院 Be used for business administration attendance equipment of checking card

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Application publication date: 20210730