CN111305685A - Electric and hand convertible chain window opener - Google Patents

Electric and hand convertible chain window opener Download PDF

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Publication number
CN111305685A
CN111305685A CN202010281195.7A CN202010281195A CN111305685A CN 111305685 A CN111305685 A CN 111305685A CN 202010281195 A CN202010281195 A CN 202010281195A CN 111305685 A CN111305685 A CN 111305685A
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CN
China
Prior art keywords
gear
chain
bevel gear
movable shaft
shaft
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.)
Granted
Application number
CN202010281195.7A
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Chinese (zh)
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CN111305685B (en
Inventor
苏卫华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Gc Opening Systems Intelligent Technology Co ltd
Original Assignee
Beijing Gc Opening Systems Intelligent Technology 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.)
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Publication date
Application filed by Beijing Gc Opening Systems Intelligent Technology Co ltd filed Critical Beijing Gc Opening Systems Intelligent Technology Co ltd
Priority to CN202010281195.7A priority Critical patent/CN111305685B/en
Publication of CN111305685A publication Critical patent/CN111305685A/en
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Publication of CN111305685B publication Critical patent/CN111305685B/en
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    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00—Power-operated mechanisms for wings
    • E05F15/60—Power-operated mechanisms for wings using electrical actuators
    • E05F15/603—Power-operated mechanisms for wings using electrical actuators using rotary electromotors
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F11/00—Man-operated mechanisms for operating wings, including those which also operate the fastening
    • E05F11/02—Man-operated mechanisms for operating wings, including those which also operate the fastening for wings in general, e.g. fanlights
    • E05F11/04—Man-operated mechanisms for operating wings, including those which also operate the fastening for wings in general, e.g. fanlights with cords, chains or cables
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
    • F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/10—Application of doors, windows, wings or fittings thereof for buildings or parts thereof
    • E05Y2900/13—Application of doors, windows, wings or fittings thereof for buildings or parts thereof characterised by the type of wing
    • E05Y2900/148—Windows

Abstract

The invention discloses an electric and manual convertible chain window opener, which comprises a chain window opener, a transmission mechanism, a motor and a crank; a first gear is fixed on an output shaft of the motor; a first bevel gear is fixed on an output shaft of the crank; the transmission mechanism comprises a first transmission rod and a movable shaft lever; one end of the first transmission rod is in transmission connection with the input end of the chain window opener, and the other end of the first transmission rod is fixed with a second gear; the movable shaft lever is rotatably provided with a gear shaft and a second bevel gear, the gear shaft is fixedly connected with the second bevel gear, the movable shaft lever can move in a reciprocating mode in the axial direction, the gear shaft is always meshed with the second gear, when the gear shaft is meshed with the first gear, the second bevel gear is separated from the first bevel gear, and when the gear shaft is separated from the first gear, the second bevel gear is meshed with the first bevel gear. The invention can realize the conversion between electric drive windowing and hand-operated drive windowing, and ensures that the window can be opened and closed in a hand-operated mode during power failure.

Description

Electric and hand convertible chain window opener
Technical Field
The invention relates to the technical field of window openers, in particular to an electric and manual convertible chain window opener.
Background
The ware of windowing is a equipment that is used for opening and closing the window, the ware of windowing of selling on the existing market has hand ware of windowing and electronic ware of windowing, along with the development of intelligent house, also more and more high to the requirement of electronic ware of windowing, it is though convenient to automatically window, but when in real life, the condition of outage can be met to the inevitable, the window can't be opened or closed after the outage, bring inconvenience for the user and cause the trouble, especially under emergency, meet above-mentioned condition and can lead to the fact very big loss for the user, the personal safety injury even.
In order to solve the problems, the electric window driving device on the market is provided with a hand-operated device, and under the condition of power failure, the electric driving window opening is converted into the hand-operated driving window opening.
For example, when the electric-driven windowing is converted into the hand-driven windowing, a bevel gear of the manual crank is pressed in from a hole in the side face of the shell, the bevel gear presses a bevel gear of the connecting shaft to separate the coupling from an output shaft of the electric drive, when the hand-driven windowing is converted into the electric-driven windowing, the manual crank needs to be drawn out, the manual crank is separated from the window machine, the window machine is easy to lose, and the hand-driven crank needs to be found when the window machine is used, so that the window machine is very inconvenient to use.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides an electric-manual convertible chain window opener.
The invention provides an electric and manual convertible chain window opener which comprises a chain window opener, a transmission mechanism, a motor and a crank, wherein the motor and the crank are used for driving the chain window opener to open and close a window through the transmission mechanism respectively; an output shaft of the crank is perpendicular to an output shaft of the motor, and a first bevel gear is coaxially fixed on the output shaft of the crank; the transmission mechanism comprises a first transmission rod and a movable shaft lever; the first transmission rod is arranged between the chain window opener and the motor, one end of the first transmission rod is in transmission connection with the input end of the chain window opener, and the other end of the first transmission rod is coaxially fixed with a second gear; the movable shaft lever is arranged in parallel to the first transmission rod, a gear shaft capable of being meshed with the first gear and the second gear and a second bevel gear capable of being meshed with the first bevel gear are rotatably arranged on the movable shaft lever, the gear shaft is fixedly connected with the second bevel gear, the movable shaft lever can move in a reciprocating mode in the axial direction, the gear shaft is always meshed with the second gear, when the gear shaft is meshed with the first gear, the second bevel gear is separated from the first bevel gear, and when the gear shaft is separated from the first gear, the second bevel gear is meshed with the first bevel gear.
The locking mechanism is used for locking the axial movement of the movable shaft rod when the gear shaft is meshed with the first gear, and after the locking mechanism unlocks the movable shaft rod, the second bevel gear can be kept meshed with the first bevel gear under the action of the spring mechanism.
Furthermore, two ends of the movable shaft rod are respectively installed on the two installation seats, a lock cavity is arranged on the outer side of the first installation seat, the first end of the movable shaft rod penetrates through the lock cavity, a lock pin is radially fixed at the end of the movable shaft rod, and an opening through which the lock pin penetrates out of or retracts into the lock cavity is formed in the side wall of the outer side of the lock cavity.
Furthermore, the second end of the movable shaft rod penetrates through the second mounting seat and is fixed with a knob.
Furthermore, the spring mechanism comprises a compression spring, a support seat is arranged on a movable shaft rod on the inner side of the second mounting seat, and the compression spring is sleeved on the movable shaft rod and supported between the second mounting seat and the support seat.
Further, the spring mechanism comprises a tension spring, and the tension spring is sleeved on the movable shaft rod and connected between the knob and the second mounting seat.
Further, the chain ware of windowing is including the chain and the drive that are used for pulling the casement switch the sprocket mechanism of chain, sprocket mechanism includes worm, worm wheel and sprocket, the worm with first transfer line transmission is connected, worm wheel and worm meshing, sprocket and worm wheel coaxial arrangement, the sprocket with the chain meshing.
Furthermore, the chain window opener is provided with two, two the worm of chain window opener is connected through the transmission of second drive lever between, one of them the worm of chain window opener with first drive lever transmission is connected.
The invention has the beneficial effects that: the meshing state between all gears can be changed by adjusting the movable shaft rod, and the conversion between electric driving windowing and hand driving windowing is realized; when the window opener is driven electrically, the gear shaft is simultaneously meshed with the first gear and the second gear, the second bevel gear is separated from the first bevel gear, the driving motor drives the first gear to rotate, the first gear drives the gear shaft to rotate, the gear shaft drives the second gear to rotate, and then the first transmission rod is driven to drive the chain window opener to open and close the window; during manual driving, the movable shaft lever is adjusted to separate the gear shaft from the first gear, the second bevel gear is meshed with the first bevel gear, the first bevel gear is driven to rotate by the hand crank, the gear shaft is driven to rotate by the first bevel gear, the second gear is driven to rotate by the gear shaft, and the first transmission rod is further driven to drive the chain window opener to open and close the window; to sum up, this application can realize the conversion between the electric drive windowing and the hand drive windowing, can pass through hand mode switch window when having ensured the outage, for prior art, organically combine hand ware and the electric window ware of windowing together, form a whole, simple structure and compactness, the awkwardness of can not finding the crank when having avoided hand drive windowing simultaneously to the operation of conversion drive mode is very convenient, and use experience is good.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a schematic structural view of an electric window opener according to an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of the drive structure of FIG. 1;
FIG. 3 is an enlarged view of a portion of the chain opener of FIG. 1;
fig. 4 is a schematic structural view of the hand-operated window opening device according to the embodiment of the present invention.
In the drawings, 10-chain window opener; 11-a chain; 12-a sprocket mechanism; 121-worm; 122-a worm gear; 123-chain wheel; 124-a second transmission rod; 20-a transmission mechanism; 21-a first transfer lever; 211-a second gear; 22-a movable shaft; 221-gear shaft; 222-a second bevel gear; 223-a mounting seat; 224-a knob; 225-a support base; 30-a motor; 31-a first gear; 40-a crank; 41-a first bevel gear; 50-a locking mechanism; 51-a lock cavity; 511-opening; 52-a locking pin; 60-spring mechanism.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following embodiments are merely used to more clearly illustrate the technical solutions of the present embodiments, and therefore, the following embodiments are only used as examples, and the protection scope of the present embodiments is not limited thereby.
As shown in fig. 1 to 4, an embodiment of the present invention provides an electric-manual convertible chain window opener, which includes a chain window opener 10, a transmission mechanism 20, a motor 30 and a crank 40 for driving the chain window opener 10 to open and close a window through the transmission mechanism 20, a locking mechanism 50, and a spring mechanism 60.
The motor 30 is a speed reduction motor, and a first gear 31 is coaxially fixed to an output shaft of the motor 30. An output shaft of the crank 40 is perpendicular to an output shaft of the motor 30, and a first bevel gear 41 is coaxially fixed to the output shaft of the crank 40. The transmission mechanism 20 comprises a first transmission rod 21 and a movable shaft rod 22; the first transmission rod 21 is arranged between the chain window opener 10 and the motor 30, one end of the first transmission rod 21 is in transmission connection with the input end of the chain window opener 10, and the other end of the first transmission rod 21 is coaxially fixed with a second gear 211; the movable shaft 22 is arranged parallel to the first transmission rod 21, a gear shaft 221 capable of meshing with the first gear 31 and the second gear 211 and a second bevel gear 222 capable of meshing with the first bevel gear 41 are rotatably mounted on the movable shaft 22, the gear shaft 221 is fixedly connected with the second bevel gear 222, the movable shaft 22 can reciprocate in the axial direction, the gear shaft 221 is always meshed with the second gear 211, when the gear shaft 221 is meshed with the first gear 31, the second bevel gear 222 is separated from the first bevel gear 41, and when the gear shaft 221 is separated from the first gear 31, the second bevel gear 222 is meshed with the first bevel gear 41.
The locking mechanism 50 is used for locking the axial movement of the movable shaft 22 when the gear shaft 221 is engaged with the first gear 31, and after the locking mechanism 50 unlocks the movable shaft 22, the second bevel gear 222 can be kept engaged with the first bevel gear 41 under the action of the spring mechanism 60. When the locking mechanism 50 is locked, the gear shaft 221 is engaged with the first gear 31 and the second gear 211, so that the electric driving can be realized, and when the locking mechanism 50 is unlocked, the elastic restoring force of the spring mechanism 60 drives the movable shaft 22 to move rightwards (by taking the orientation in the drawing as a reference), so that the gear shaft 221 is separated from the first gear 31, and the second bevel gear 222 is engaged with the first bevel gear 41, so that the hand-cranking driving can be realized.
Specifically, referring to fig. 2, two ends of the movable shaft 22 are respectively mounted on two mounting seats 223, wherein a lock cavity 51 is disposed outside a first mounting seat 223 (the mounting seat 223 on the right side in the drawing), a first end (the right end in the drawing) of the movable shaft 22 passes through the lock cavity 51, a lock pin 52 is radially fixed at the end of the movable shaft 22, and an opening 511 for the lock pin 52 to pass through or retract into the lock cavity 51 is disposed on the outer side wall of the lock cavity 51. When locking, the lock pin 52 retracts into the lock cavity 51 from the opening 511, and then the movable shaft 22 is rotated, so that the lock pin 52 is locked in the lock cavity 51. To facilitate the rotation of the movable shaft 22, a second end (left end in the drawing) of the movable shaft 22 passes through a second mounting seat 223 (left mounting seat 223 in the drawing) and is fixed with a knob 224.
As a specific example, referring to fig. 2, the spring mechanism 60 includes a compression spring, a support seat 225 is provided on the movable shaft 22 inside the second mounting seat 223 (the mounting seat 223 on the left side in the drawing), the compression spring is sleeved on the movable shaft 22 and supported between the second mounting seat 223 (the mounting seat 223 on the left side in the drawing) and the support seat 225, when the electric drive is performed, the movable shaft 22 is locked, the compression spring is in a compressed state, and after the movable shaft 22 is unlocked, the compression spring pushes the movable shaft 22 to move rightward (with reference to the orientation in the drawing).
As another specific example (not shown in the figures), the spring mechanism 60 includes a tension spring, which is sleeved on the movable shaft 22 and connected between the knob 224 and the second mounting seat 223, when the electric drive is performed, the movable shaft 22 is locked, the tension spring is in a stretching state, and after the movable shaft 22 is unlocked, the tension spring pulls the movable shaft 22 to move to the right.
Referring to fig. 3, the chain window opener 10 includes a chain 11 for pulling a window sash switch and a chain wheel mechanism 12 for driving the chain 11, the chain wheel mechanism 12 includes a worm 121, a worm wheel 122 and a chain wheel 123, the worm 121 is drivingly connected to the first driving rod 21, the worm wheel 122 is engaged with the worm 121, the chain wheel 123 is coaxially installed with the worm wheel 122, and the chain wheel 123 is engaged with the chain 11. When the chain window opener 10 works, the worm 121 drives the worm wheel 122 to rotate, the chain wheel 123 is in coaxial linkage with the worm wheel 122, the chain wheel 123 drives the chain 11 to retract and release, the extending end of the chain 11 is connected with a window sash to further drive the window sash to open and close, and the transmission mechanism 20 of the worm wheel 122 and the worm 121 is adopted, so that self-locking of the window sash can be realized, and the use safety is ensured.
The chain window opener 10 may be provided with only one, or two or more, preferably, two chain window openers 10 are provided, the worms 121 of two chain window openers 10 are in transmission connection through the second transmission rod 124, and the worm 121 of one chain window opener 10 is in transmission connection with the first transmission rod 21. The structure can realize the synchronous work of the two chain window openers 10, and the chains 11 of the two chain window openers 10 are respectively connected to the two sides of the window sashes, so that the stress balance of the window sashes during opening and closing of the window is ensured.
The meshing state between each gear can be changed through adjusting movable shaft lever 22 to this application, realizes the conversion between the window of electric drive windowing and the window of hand drive. As shown in fig. 1, during electric driving, the gear shaft 221 is engaged with the first gear 31 and the second gear 211 at the same time, the second bevel gear 222 is separated from the first bevel gear 41, the driving motor 30 drives the first gear 31 to rotate, the first gear 31 drives the gear shaft 221 to rotate, the gear shaft 221 drives the second gear 211 to rotate, and further drives the first transmission rod 21 to drive the chain window opener 10 to open and close the window. As shown in fig. 4, during manual driving, the movable shaft 22 is adjusted to separate the gear shaft 221 from the first gear 31, the second bevel gear 222 is engaged with the first bevel gear 41, the crank handle 40 drives the first bevel gear 41 to rotate, the first bevel gear 41 drives the gear shaft 221 to rotate, the gear shaft 221 drives the second gear 211 to rotate, and further drives the first transmission rod 21 to drive the chain window opener 10 to open and close the window.
To sum up, this application can realize the conversion between the electric drive windowing and the hand drive windowing, can pass through hand mode switch window when having ensured the outage, for prior art, this application organically combines hand ware and the electric window ware of windowing together, forms a whole, and simple structure and compactness have avoided the awkwardness that can not find crank 40 when needing hand drive windowing simultaneously to the operation of conversion drive mode is very convenient, and use experience is good.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solution of the present embodiment, and not for limiting the same; although the present embodiment 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 or all of the technical features may be equivalently replaced; these modifications and substitutions do not cause the essence of the corresponding technical solution to depart from the scope of the technical solutions of the embodiments of the present embodiment, and all of them should be covered in the claims and the specification of the present embodiment.

Claims (8)

1. The utility model provides an electronic manual convertible chain ware of windowing, includes chain ware of windowing, drive mechanism and passes through respectively drive mechanism drive chain ware of windowing switch window's motor and crank, its characterized in that:
a first gear is coaxially fixed on an output shaft of the motor;
an output shaft of the crank is perpendicular to an output shaft of the motor, and a first bevel gear is coaxially fixed on the output shaft of the crank;
the transmission mechanism comprises a first transmission rod and a movable shaft lever; the first transmission rod is arranged between the chain window opener and the motor, one end of the first transmission rod is in transmission connection with the input end of the chain window opener, and the other end of the first transmission rod is coaxially fixed with a second gear; the movable shaft lever is arranged in parallel to the first transmission rod, a gear shaft capable of being meshed with the first gear and the second gear and a second bevel gear capable of being meshed with the first bevel gear are rotatably arranged on the movable shaft lever, the gear shaft is fixedly connected with the second bevel gear, the movable shaft lever can move in a reciprocating mode in the axial direction, the gear shaft is always meshed with the second gear, when the gear shaft is meshed with the first gear, the second bevel gear is separated from the first bevel gear, and when the gear shaft is separated from the first gear, the second bevel gear is meshed with the first bevel gear.
2. The electric-manual convertible chain opener of claim 1 wherein: the locking mechanism is used for locking the axial movement of the movable shaft rod when the gear shaft is meshed with the first gear, and after the locking mechanism unlocks the movable shaft rod, the second bevel gear can be kept meshed with the first bevel gear under the action of the spring mechanism.
3. The electric-manual convertible chain opener of claim 2 wherein: the two ends of the movable shaft rod are respectively arranged on the two mounting seats, a lock cavity is arranged on the outer side of the first mounting seat, the first end of the movable shaft rod penetrates through the lock cavity, a lock pin is radially fixed at the end of the movable shaft rod, and an opening through which the lock pin penetrates out of or retracts into the lock cavity is formed in the side wall of the outer side of the lock cavity.
4. The electric-manual convertible chain opener of claim 3 wherein: the second end of the movable shaft rod penetrates through the second mounting seat and is fixed with a knob.
5. The electric-manual convertible chainopener according to claim 3 or 4, characterized in that: the spring mechanism comprises a compression spring, a supporting seat is arranged on a movable shaft lever on the inner side of the second mounting seat, and the compression spring is sleeved on the movable shaft lever and supported between the second mounting seat and the supporting seat.
6. The electric-manual convertible chain opener of claim 4 wherein: the spring mechanism comprises a tension spring which is sleeved on the movable shaft lever and connected between the knob and the second mounting seat.
7. The electric-manual convertible chain opener of claim 1 wherein: the chain ware of windowing is including the chain and the drive that are used for pulling the casement switch the sprocket mechanism of chain, sprocket mechanism includes worm, worm wheel and sprocket, the worm with a drive rod transmission is connected, worm wheel and worm meshing, sprocket and worm wheel coaxial arrangement, the sprocket with the chain meshing.
8. The electric-manual convertible chain opener of claim 7 wherein: the chain window opener is provided with two, two the worm of chain window opener is connected through the transmission of second drive lever between, one of them the worm of chain window opener with first drive lever transmission is connected.
CN202010281195.7A 2020-04-10 2020-04-10 Electric and hand convertible chain window opener Active CN111305685B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010281195.7A CN111305685B (en) 2020-04-10 2020-04-10 Electric and hand convertible chain window opener

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010281195.7A CN111305685B (en) 2020-04-10 2020-04-10 Electric and hand convertible chain window opener

Publications (2)

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CN111305685A true CN111305685A (en) 2020-06-19
CN111305685B CN111305685B (en) 2021-05-07

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4124282A1 (en) * 1991-07-23 1993-01-28 Dorma Gmbh & Co Kg Electromechanical drive for door - has clutch-driven gearing with programmed hold in open position and stored energy return drive
CN203808706U (en) * 2013-11-25 2014-09-03 江门市路思拓电机电器有限公司 Chain window opener with automatic rotation manual function
CN205445261U (en) * 2016-03-29 2016-08-10 浙江倍特储粮设备科技有限公司 Grain depot sealed window that can automatic hand switch
CN206157679U (en) * 2016-11-13 2017-05-10 张紫桐 Hand is from dual purpose channel gate
CN110469228A (en) * 2019-08-14 2019-11-19 山东大学 Window opener can be switched in a kind of push type snap switch mechanism and its electric/manual
CN211974703U (en) * 2020-04-10 2020-11-20 北京吉时开启智能科技有限公司 Electric and hand convertible chain window opener

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4124282A1 (en) * 1991-07-23 1993-01-28 Dorma Gmbh & Co Kg Electromechanical drive for door - has clutch-driven gearing with programmed hold in open position and stored energy return drive
CN203808706U (en) * 2013-11-25 2014-09-03 江门市路思拓电机电器有限公司 Chain window opener with automatic rotation manual function
CN205445261U (en) * 2016-03-29 2016-08-10 浙江倍特储粮设备科技有限公司 Grain depot sealed window that can automatic hand switch
CN206157679U (en) * 2016-11-13 2017-05-10 张紫桐 Hand is from dual purpose channel gate
CN110469228A (en) * 2019-08-14 2019-11-19 山东大学 Window opener can be switched in a kind of push type snap switch mechanism and its electric/manual
CN211974703U (en) * 2020-04-10 2020-11-20 北京吉时开启智能科技有限公司 Electric and hand convertible chain window opener

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