Manual-electric integrated door and window driving mechanism and vertical sliding window

Abstract

The invention relates to the technical field of vertical sliding windows, in particular to a manual and electric integrated door and window driving mechanism which comprises a manual driving device, an electric driving device, a transmission shaft, two transmission gears arranged on the transmission shaft and two racks meshed with the two transmission gears respectively. A first gear and a second gear are arranged in the first gear box and are worms or bevel gears which are in transmission connection, the handle is in transmission connection with the first gear, the electric driving device comprises a motor and the second gear box which are in transmission connection, and a third gear and a fourth gear which are in transmission connection are arranged in the second gear box. An output shaft of the motor is in transmission connection with the third gear, and the transmission shaft is in transmission connection with the second gear and the fourth gear. The invention further provides a vertical sliding window which is provided with the door and window driving mechanism, so that the window can be opened or closed manually or electrically.

Description

Technical Field

[0001] The present invention relates to the technical field of lifting windows, and specifically to a flashlight-integrated door and window drive mechanism and a lifting window. Background Art

[0002] Lifting windows are opened and closed vertically, and have the advantages of good ventilation effect, good airtightness and no space occupation. Therefore, they are widely used in application scenarios such as balconies and display windows. For larger lifting windows, due to their large weight, it is rather strenuous and difficult for users to directly push and pull the movable window sash to open and close the window, which affects the use experience. To solve this problem, some lifting windows with electric drive methods for opening and closing windows have emerged on the market. However, when there is a power outage or a motor failure, they will not work properly and affect the use experience. Summary of the Invention

[0003] In order to overcome the defects existing in the prior art, the task of the present invention is to provide a flashlight-integrated door and window drive mechanism and a lifting window.

[0004] The task of the present invention is achieved by the following technical solutions:

[0005] A flashlight-integrated door and window drive mechanism includes a drive assembly and a transmission assembly. The drive assembly includes a manual drive device and an electric drive device. The transmission assembly includes a transmission shaft, two transmission gears arranged on the transmission shaft, and two racks respectively meshing with the two transmission gears. The manual drive device includes a first gear box and a handle. A first gear and a second gear are arranged in the first gear box. The first gear and the second gear are worm gears or bevel gears in transmission connection, so that the axes of the two gears form an angle greater than 0 degrees. The handle is in transmission connection with the first gear. The electric drive device includes a motor and a second gear box in transmission connection. A third gear and a fourth gear in transmission connection are arranged in the second gear box. The output shaft of the motor is in transmission connection with the third gear. The transmission shaft is in transmission connection with the second gear and the fourth gear. The transmission shaft can be driven to rotate by the handle or the motor, and then the two racks can be driven to move synchronously by the two transmission gears.

[0006] As a preferred technical solution, the electric drive device further includes a reduction gear box and a clutch. The motor, the reduction gear box, the clutch and the second gear box are sequentially in transmission connection and integrally fixed together.

[0007] As a preferred technical solution, the clutch includes a drum, a dial, a magnetic disk, and at least one spherical or columnar and magnetically conductive ball. The drum is in transmission connection with the third gear. The magnetic disk is fixedly arranged outside the drum. The dial includes a dial shaft and a dial tooth arranged at one end of the dial shaft. The other end of the dial shaft passes through the magnetic disk and is in transmission connection with the output end of the reduction gearbox. The dial tooth and the ball are located inside the drum. At least one groove for partially embedding the ball is arranged on the inner peripheral wall of the drum. When the motor drives the dial to rotate relative to the drum, the ball can be driven to be thrown out and partially caught in the groove, so as to drive the drum to rotate synchronously. When the motor stops rotating or the rotational speed of the drum is greater than that of the dial, the ball can be adsorbed by the magnetic disk and separated from the groove, so that the clutch is automatically disengaged.

[0008] As a preferred technical solution, the clutch further includes a fixedly arranged non-magnetic disk. The front surface of the non-magnetic disk is smooth and flat and covers the port of the drum. The magnetic disk is flatly attached to the back surface of the non-magnetic disk.

[0009] As a preferred technical solution, the transmission shaft sequentially passes through the shaft holes of the second gear and the fourth gear and is in transmission connection with them. The shaft holes of the second gear and the fourth gear and the transmission shaft are all non-circular structures, so that the second gear and the fourth gear can transmit rotation to the transmission shaft.

[0010] As a preferred technical solution, the handle is of a crank structure. One end of the handle is provided with a plugging part for detachably plugging with the first gear, and the other end of the handle is provided with a holding part for a person to hold.

[0011] As a preferred technical solution, a locking mechanism for locking the first gear and / or the second gear is further arranged on the first gearbox.

[0012] As a preferred technical solution, a lifting auxiliary device is further included. The lifting auxiliary device includes a slider for rotatably connecting with the movable sash and for slidingly connecting with the frame, and a spring seat fixedly installed on the frame. A plurality of groups of coil springs are arranged in the spring seat, and each coil spring extends out of the spring seat and is connected with the slider.

[0013] A lifting window includes a frame, a movable sash movably installed in the frame and capable of reciprocating up and down, and a fixed sash fixedly installed in the frame. The lifting window further includes the flashlight-integrated door and window driving mechanism described in any one of the above. The first gearbox and the motor are fixedly installed on the fixed sash or the frame. The two racks are respectively vertically fixedly installed on the left and right sides of the movable sash. The handle or the motor can drive the transmission shaft to rotate, and then drive the movable sash to move up and down through the two transmission gears and the racks, so as to realize window opening or closing.

[0014] Compared with the prior art, a flashlight-integrated door and window driving mechanism and a lifting window provided by the present invention have the following advantages: By providing a transmission shaft and simultaneously arranging a manual driving device and an electric driving device on the transmission shaft, during use, the window can be opened and closed either by driving the transmission shaft to rotate through the motor or by manually turning the handle to drive the transmission shaft to rotate; moreover, by utilizing the torque of the handle and / or the reduction ratio of the gear set in the first gearbox, the purpose of making it easier to manually open the window can be achieved; and since the two gears arranged on the transmission shaft will synchronously drive the left and right sides of the movable window sash when the transmission shaft rotates, the movable window sash runs smoothly and is not prone to jamming during up and down movement; and by adopting a mechanical transmission method of gear and rack to drive the lifting of the movable window sash, the transmission is more stable.

[0015] The concept, specific structure and effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, features and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the flashlight-integrated door and window driving mechanism installed on the lifting window in the embodiment;

[0017] Figure 2 It is a schematic structural diagram of the manual driving device after omitting the housing;

[0018] Figure 3 It is a schematic structural diagram of the electric driving device;

[0019] Figure 4 It is a schematic structural diagram of the electric driving device after omitting part of the housing;

[0020] Figure 5 It is an exploded structural diagram of the clutch;

[0021] Figure 6 It is an exploded structural diagram of the reduction gearbox;

[0022] Figure 7 It is a schematic structural diagram of the lifting auxiliary device.

[0023] Wherein: manual driving device 1, first gearbox 11, first gear 111, second gear 112, handle 12, electric driving device 2, motor 21, second gearbox 22, third gear 221, fourth gear 222, reduction gearbox 23, housing 231, fixed sleeve 232, internal gear ring 2321, rotating frame 233, planetary gear 234, driving gear 235, mounting shaft 236, plug connector 237, clutch 24, roller 241, slot 2411, dial 242, dial shaft 2421, dial tooth 2422, magnetic disk 243, ball 244, non-magnetic disk 245, transmission shaft 3, transmission gear 4, rack 5, lifting auxiliary device 6, slider 61, spring seat 62, spring 621, support bearing 7, frame 100, movable sash 101, fixed sash 102. Detailed implementation manner

[0024] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the following further elaborates on the present invention in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] It should be noted that when an element is referred to as "connected to", "mounted on", "drivably connected to" another element, it can be directly connected to, mounted on, drivably connected to the other element, or indirectly connected to, mounted on, drivably connected to the other element through an intermediate element. Additionally, the terms "upper", "lower" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation; "first", "second" and similar terms do not denote any order, quantity or importance, but are only used to distinguish different components; the terms "one" or "a" and similar words do not denote a quantity limitation, but rather indicate the existence of at least one; terms such as "several", "multiple" and similar words denote two or more.

[0026] Embodiment 1:

[0027] As Figures 1-7As shown in the figure, a hand-electric integrated door and window drive mechanism includes a drive assembly and a transmission assembly. The drive assembly includes a manual drive device 1 and an electric drive device 2. The transmission assembly includes a transmission shaft 3, two transmission gears 4 arranged on the transmission shaft 3, and two racks 5 respectively meshing with the two transmission gears 4. The manual drive device 1 includes a first gearbox 11 and a handle 12. A first gear 111 and a second gear 112 are arranged in the first gearbox 11. The first gear 111 and the second gear 112 are worm gears or bevel gears in transmission connection, so that the axes of the first gear 111 and the second gear 112 form an angle greater than 0 degrees. In this embodiment, it is preferably that the axes of the first gear 111 and the second gear 112 are perpendicular, which is convenient for the user to drive the first gearbox 11 through the handle 12. One end of the handle 12 is in transmission connection with the first gear 111. The electric drive device 2 includes a motor 21 and a second gearbox 22 in transmission connection. A third gear 221 and a fourth gear 222 with parallel axes and in transmission connection are arranged in the second gearbox 22. The output shaft of the motor 21 is in transmission connection with the third gear 221. The transmission shaft 3 sequentially passes through the shaft holes of the second gear 112 and the fourth gear 222 and is in transmission connection with them. The transmission shaft 3 can be driven to rotate by the handle 12 or the motor 21, and then the two racks 5 can be driven to move synchronously by the two transmission gears 4. In this embodiment, the tooth number ratio of the first gear 111 and the second gear 112 can be 1; in other embodiments, the tooth number ratio can also be less than 1, so that the output speed is reduced and the torque is increased, making it easier for the user to shake the handle; the tooth number ratio can also be greater than 1, so that the output speed is increased and the torque is reduced, enabling the user to raise and lower the movable window sash faster when shaking the handle. In other embodiments, the transmission shaft 3 can also be in transmission connection with the shaft holes of the second gear 112 and the fourth gear 222 through other gears; the third gear 221 and the fourth gear 222 in the second gearbox 22 can also be bevel gears or helical gears with non-parallel axes; the number of electric drive devices 2 can also be multiple; these other embodiments are not shown in the drawings.

[0028] A hand-electric integrated door and window drive mechanism provided in this embodiment is generally installed on doors and windows as a door and window accessory during use for opening or closing the doors and windows. Taking the installation on a lifting window as an example, as Figure 1 shown, it has the following advantages: By setting the transmission shaft 3 and simultaneously setting the manual drive device 1 and the electric drive device 2 on the transmission shaft 3, during use, the doors and windows can be opened and closed either by driving the transmission shaft 3 to rotate through the motor 21 or by manually shaking the handle 12 to drive the transmission shaft 3 to rotate; moreover, by utilizing the torque of the handle 12 and / or the reduction ratio of the gear set in the first gearbox 11, the purpose of relatively labor-saving manual window opening can be achieved; and since the transmission shaft 3 will synchronously drive the left and right sides of the movable window sash through the two gears arranged on it when rotating, the movable window sash runs smoothly and is not prone to jamming when rising and falling.

[0029] As a preferred solution of this embodiment, the electric drive device 2 further includes a reduction gearbox 23 and a clutch 24. The motor 21, the reduction gearbox 23, the clutch 24, and the second gearbox 22 are sequentially connected in transmission and integrally fixed together. Preferably, the clutch 24 includes a drum 241, a dial 242, a disk 243, and at least one spherical or columnar and magnetically conductive ball 244. The drum 241 is connected in transmission with the third gear 221. The disk 243 is fixedly arranged outside the drum 241. The dial 242 includes a dial shaft 2421 and a dial tooth 2422 arranged at one end of the dial shaft 2421. The other end of the dial shaft 2421 passes through the disk 243 and is connected in transmission with the output end of the reduction gearbox 23. The dial tooth 2422 and the ball 244 are located inside the drum 241. The inner peripheral wall of the drum 241 is provided with at least one embedding groove 2411 for partially embedding the ball 244. When the motor 21 drives the dial 242 to rotate relative to the drum 241, the ball 244 can be driven to be thrown out and partially snap into the embedding groove 2411, so as to drive the drum 241 to rotate synchronously. When the motor 21 stops rotating or the rotational speed of the drum 241 is greater than that of the dial 242, the ball 244 can be adsorbed by the disk 243 and separated from the embedding groove 2411, so that the clutch 24 is automatically disengaged. In this embodiment, preferably, the disk 243 is made of permanent magnet material, the ball 244 is made of magnetically conductive iron material, and the drum 241, the dial 242, etc. are made of non-magnetic materials. The working principle of this clutch 24 is as follows: When the motor 21 rotates forward or backward, it can drive the dial 242 to rotate relative to the drum 241. Therefore, under the combined action of the pushing of the dial tooth 2422 and the centrifugal force, the ball 244 can break away from the magnetic attraction of the disk 243 and move outward until it partially snaps into the embedding groove 2411 of the drum 241. When the dial tooth 2422 continues to rotate, it will drive the drum 241 to rotate through the ball 244 exposed in the embedding groove 2411, so as to drive the transmission shaft 3 to rotate through the second gearbox 22, that is, the engaged state of the clutch is realized; When the motor 21 stops rotating, or although the motor 21 has not stopped rotating and an external force intervenes (for example, when the user opens or closes the window through the manual drive device 1) to drive the drum 241 and the dial shaft 2421 to rotate in the same direction and the rotational speed is greater than that of the dial shaft 2421, the ball 244 obtains a free movement space, so that it can quickly disengage from the embedding groove 2411 of the drum 241 under the magnetic attraction of the disk 243. At this time, the dial tooth 2422 and the drum 241 are in a disengaged state, and the rotation of the drum 241 will not interfere with the dial 242 and the motor 21, that is, the disengaged state of the clutch is realized. At this time, if the motor 21 is still running and the external force stops intervening, the dial 242 will quickly push the ball 244 back into the embedding groove 2411 of the drum 241 to realize the engagement of the clutch.It should be noted that since there will be some mating clearances in the motor 21 (or the reduction gearbox 23) itself, when the motor 21 stops rotating, even if no additional program is set to make the motor 21 reverse, the ball 244 can obtain a little free space. Of course, if the motor 21 makes a slight reverse rotation after stopping, it can make the ball 244 obtain more free space.

[0030] As a preferred solution of this embodiment, the clutch 24 further includes a fixedly arranged non-magnetic disk 245. The front surface of the non-magnetic disk 245 is smooth and flat and covers the port of the drum 241, and the magnetic disk is flatly attached to the back surface of the non-magnetic disk 245. By providing the non-magnetic disk 245, and the front surface of the non-magnetic disk 245 is a smooth and flat integral structure, the resistance of the ball 244 when moving on the non-magnetic disk 245 is smaller. Moreover, due to the magnetic isolation effect of the non-magnetic disk 245, the ball 244 will not be directly adsorbed on the magnetic disk 243. When the dial 242 rotates to push the ball 244, it is easier for the ball 244 to break away from the suction of the magnetic disk 243 under the action of centrifugal force and embed into the embedding groove 2411. Therefore, the engagement and disengagement conversion of the clutch can be made more smooth, and it is not easy to appear stuck and worn. When the motor 21 rotates, the clutch can also be disengaged at any time through manual intervention, and the clutch can quickly resume the engaged state when the manual intervention stops, which is convenient to use.

[0031] As a preferred solution of this embodiment, the reduction gearbox 23 in this embodiment includes a housing 231 and three levels of reduction gear sets connected in series in sequence, namely a first-level reduction gear set, a second-level reduction gear set, and a third-level reduction gear set. Each level of reduction gear set includes a fixed sleeve 232, a rotating frame 233, three planetary gears 234, and a driving gear 235 concentrically arranged within the fixed sleeve 232. The inner side wall of the fixed sleeve 232 is provided with an internal gear ring 2321. On the front surface of the rotating frame 233, a plurality of mounting shafts 236 are evenly spaced circumferentially. Each planetary gear 234 is sleeved on one mounting shaft 236 so as to be able to rotate relative to the rotating frame 233. The outer sides of each planetary gear 234 are all meshed with the internal gear ring 2321, and the inner sides are all meshed with the driving gear 235. Among them, the driving gear 235 of the first-level reduction gear set is connected to the output shaft of the motor 21, and the driving gears 235 of the remaining levels of reduction gear sets are fixedly connected to the back surface of the rotating frame 233 of its previous-level reduction gear set. On the back surface of the rotating frame 233 of the third-level reduction gear set, there is a socket 237 for connecting the plug shaft 2421 of the clutch 24. Among them, the gears and gear rings of the first-level reduction gear set are helical gears that cooperate with each other. By using helical gears in at least one level of the planetary reduction mechanism, the meshing process between the gear teeth is a gradual process. The force on the gear teeth also gradually increases from small to large and then decreases from large to small. The meshing time is long, the contact area is large, and the stress is reduced. Thus, it can make the meshing performance better during operation, the operation more stable, the noise lower, and the load-bearing capacity stronger. By setting the gears and gear rings of the first-level reduction gear set as helical gears, the characteristics of helical gears can be effectively utilized to smoothly transition the torque and high-speed rotation transmitted by the driving shaft of the motor 21. At the same time, it also avoids the high-cost problem caused by using helical gears in all levels of reduction gear sets.

[0032] As a preferred solution of this embodiment, the shaft holes of the second gear 112 and the fourth gear 222 and the transmission shaft 3 are all non-circular structures, so that the second gear 112 and the fourth gear 222 can transmit rotation to the transmission shaft 3.

[0033] As a preferred solution of this embodiment, the handle 12 is a crank structure. One end of the handle 12 is provided with a plugging portion for detachably plugging with the first gear 111, and the other end of the handle 12 is provided with a gripping portion for a person to hold.

[0034] As a preferred solution of this embodiment, the first gear box 11 is further provided with a locking mechanism for locking the first gear 111 and / or the second gear 112. The locking mechanism can be a latch respectively provided on the first gear box 11, and a socket provided on the corresponding first gear 111 and / or the second gear 112, or other structures capable of achieving a locking function (not shown in the drawings). By providing the locking mechanism, the first gear box 11 can be locked by the locking mechanism when the window does not need to be opened or closed, thereby locking the movable window sash to improve safety.

[0035] As a preferred solution of this embodiment, a lifting auxiliary device 6 is also included, which includes a slider 61 for rotatably connecting with the movable window sash and for sliding connection with the frame, and a coil spring seat 62 for fixed installation on the frame, wherein a plurality of coil springs 621 are arranged in the coil spring seat 62, and each coil spring 621 extends from the coil spring seat 62 and is connected to the slider 61. By providing the lifting auxiliary device 6, the elastic force of the coil spring 621 can be used to share the weight of the movable window sash, thereby making it easier to open the window by the handle 12 or the motor 21, and the requirements for the performance and size of the motor 21 are smaller.

[0036] Embodiment 2:

[0037] like Figure 1 As shown, the present embodiment provides a lifting window, comprising a frame 100, a movable window sash 101 movably installed in the frame 100 and capable of reciprocating up and down, and a fixed window sash 102 fixedly installed in the frame 100, the lifting window also includes the hand-electric integrated door and window driving mechanism in Example 1, wherein the first gear box 11 and the motor 21 are fixedly installed on the window frame of the fixed window sash 102, the transmission shaft 3 passes through the first gear box 11 and the motor 21 in sequence, and the fixed window sash 102 is also provided with a plurality of support bearings 7 for supporting the transmission shaft 3 at intervals, the two racks 5 are respectively vertically fixedly installed on the left and right sides of the movable window sash 101, and the sliding grooves on both sides of the frame 100 are provided with a fixedly connected coil spring seat 62 and a slidingly connected slider 61, and the two sliders 61 are also respectively connected to the left and right sides of the movable window sash 101 through a latch 63 or the transmission shaft 3. The handle 12 or the motor 21 can drive the transmission shaft 3 to rotate, and then drive the movable window sash 101 to move up and down through the two transmission gears 4 and the rack 5 to realize opening or closing the window. In other embodiments, the first gear box 11 and the motor 21 may also be fixedly mounted on the frame 100 , which embodiments are not shown in the drawings.

[0038] The above description is only a preferred embodiment of the present application and an explanation of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solution formed by mutually replacing the above features with the technical features (but not limited to) disclosed in the present application that have similar functions.

Claims

1. A flashlight-integrated door and window driving mechanism, characterized in that, The invention comprises a driving assembly and a transmission assembly, wherein the driving assembly comprises a manual driving device and an electric driving device, wherein the transmission assembly comprises a transmission shaft, two transmission gears arranged on the transmission shaft, and two racks respectively meshing with the two transmission gears, wherein the manual driving device comprises a first gear box and a handle, wherein a first gear and a second gear are arranged in the first gear box, wherein the first gear and the second gear are worm gears or bevel gears connected in transmission so that the axes of the two gears form an angle greater than 0 degree, and the handle is connected in transmission with the first gear, wherein the electric driving device comprises a motor and a second gear box connected in transmission, wherein a third gear and a fourth gear are arranged in transmission in the second gear box, wherein the output shaft of the motor is connected in transmission with the third gear, and wherein the transmission shaft is connected in transmission with the second gear and the fourth gear, and the transmission shaft can be driven to rotate by the handle or the motor, and then the two racks are driven to move synchronously by the two transmission gears.

2. The flashlight integrated door and window drive mechanism according to claim 1, characterized in that The electric drive device also includes a reduction gearbox and a clutch. The motor, the reduction gearbox, the clutch and the second gearbox are sequentially transmission-connected and integrated and fixed together.

3. The flashlight integrated door and window drive mechanism according to claim 2, characterized in that, The clutch includes a drum, a dial wheel, a disk and at least one spherical or cylindrical magnetically conductive ball, wherein the drum is transmission-connected to the third gear, the disk is fixedly arranged outside the drum, the dial wheel includes a dial shaft and a dial tooth arranged at one end of the dial shaft, the other end of the dial shaft passes through the disk and is transmission-connected to the output end of the reduction gearbox, the dial tooth and the ball are located in the drum, and the inner circumferential wall of the drum is provided with at least one embedding groove for partially embedding the ball. When the motor drives the dial wheel to rotate relative to the drum, the ball can be driven to be thrown out and partially stuck in the embedding groove, thereby driving the drum to rotate synchronously. When the motor stops or the drum speed is greater than the dial wheel, the ball can be adsorbed by the disk and detached from the embedding groove, thereby automatically disengaging the clutch.

4. The flashlight integrated door and window driving mechanism according to claim 3, characterized in that, The clutch also includes a fixed non-magnetic disk, the front side of which is smooth and flat and covers the port of the roller, and the magnetic disk is flatly arranged on the back side of the non-magnetic disk.

5. The flashlight integrated door and window driving mechanism according to claim 1, wherein The transmission shaft passes through the shaft holes of the second gear and the fourth gear in sequence and is transmission-connected therewith; the shaft holes of the second gear and the fourth gear and the transmission shaft are all non-circular structures, so that the second gear and the fourth gear can transmit rotation to the transmission shaft.

6. The flashlight integrated door and window driving mechanism according to claim 1, characterized in that, The handle is a crank structure, one end of the handle is provided with a plug-in portion for detachably plugging with the first gear, and the other end of the handle is provided with a gripping portion for a person to hold.

7. The flashlight integrated door and window driving mechanism according to claim 1, characterized in that, The first gear box is also provided with a locking mechanism for locking the first gear and / or the second gear.

8. The flashlight integrated door and window drive mechanism according to claim 1, characterized in that It also includes a lifting auxiliary device, which includes a slider for rotatably connecting with the movable window sash and for sliding connection with the frame, and a coil spring seat for fixed installation on the frame, wherein a plurality of coil springs are arranged in the coil spring seat, and each coil spring extends from the coil spring seat and is connected to the slider.

9. A lifting window, comprising a frame, a movable window sash movably installed within the frame and capable of reciprocating up and down, and a fixed window sash fixedly installed within the frame, characterized in that, The lift window further includes the flashlight-integrated door and window drive mechanism according to any one of claims 1-8, wherein the first gearbox and the motor are fixedly installed on the fixed window sash or the frame, the two racks are respectively fixedly installed vertically on the left and right sides of the movable window sash, and the handle or the motor can drive the transmission shaft to rotate, and then drive the movable window sash to move up and down through the two transmission gears and the racks, so as to realize window opening or closing.

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