CN210714421U

CN210714421U - Round-head window

Info

Publication number: CN210714421U
Application number: CN201921388459.8U
Authority: CN
Inventors: 陈锦荣
Original assignee: Dongguan Zhaofa Hardware Glassware Co ltd
Current assignee: Dongguan Zhaofa Hardware Glassware Co ltd
Priority date: 2019-08-23
Filing date: 2019-08-23
Publication date: 2020-06-09
Anticipated expiration: 2029-08-23

Abstract

The utility model belongs to the technical field of the technique of window and specifically relates to a round head window is related to. The round-head window comprises a main frame, a gauze outer frame, a gauze, a rotating device, a driving device and a window sash; the upper end of the main frame is a semicircular frame, and the lower end of the main frame is a rectangular frame; the rectangular frame is used for accommodating the window sash; the window sash is hinged with the rectangular frame and can be opened and closed relative to the rectangular frame; the gauze outer frame is made of soft material; the gauze outer frame is surrounded by four side edges which are connected end to end, the gauze is arranged in the gauze outer frame, a gap is formed between the gauze and one side edge of the gauze outer frame, and the length of the gap is consistent with that of the rectangular frame; the gap is a visible area; the rotating device is arranged in the rectangular frame and can rotate relative to the rectangular frame; when the rotating device rotates, the gauze outer frame is driven to move relative to the rotating device; the driving device is used for driving the rotating device to rotate. The utility model discloses following beneficial effect has: the screen and the visible area can be switched at will without disassembling the screen device.

Description

Round-head window

Technical Field

The utility model relates to a technical field of window, more specifically say, it relates to a button head window.

Background

Generally, windows in the market are roughly divided into square windows and round-head windows, and the round-head windows are widely applied to European-style buildings.

A round-head window on the world includes window frame and casement, and the casement can open and shut for window frame relatively, and window frame top is semi-circular, and the below is square. In order to prevent mosquitoes from flying into the room after the window is opened, a screen window is generally fixedly installed to prevent mosquitoes from entering the market.

However, the screen window of the round-head window is fixedly arranged on the frame, and the screen window cannot be taken down to influence the visual field in winter or when the window needs a clear visual field when closed.

Disclosure of Invention

The utility model aims at providing a round-head window mainly lies in solving the round-head window of taking the screen window among the prior art when needs the clear field of vision, and the screen window can only lead to influencing the problem of sight through dismantling unable dismantlement.

The above object of the present invention is achieved by the following technical solutions: a round-head window comprises a main frame, a gauze, a rotating device, a driving device and a window sash; the upper end of the main frame is a semicircular frame, and the lower end of the main frame is a rectangular frame; the semicircular frame is used for accommodating glass, and the rectangular frame is used for accommodating a window sash; the window sash is hinged with the outer wall of the rectangular frame and can be opened and closed relative to the rectangular frame; the gauze outer frame is made of soft material; the gauze frame is surrounded by four side edges which are connected end to end, the four side edges are respectively a first side edge, a second side edge, a third side edge and a fourth side edge, wherein the first side edge and the third side edge have the same length, the second side edge and the fourth side edge have the same length, and the first side edge is shorter than the fourth side edge; the gauze is arranged in the gauze outer frame, the outer edge of the gauze is respectively connected with the first side edge, the second side edge and the fourth side edge, gaps are formed between the gauze and the third side edge, and the length of the gaps is consistent with that of the rectangular frame; the gap forms a visible area; the rotating device is arranged in the rectangular frame and can rotate relative to the rectangular frame; the gauze device is connected with the rotating device through the first side edge and the third side edge of the gauze outer frame; when the rotating device rotates, the gauze outer frame moves relative to the rotating device; the driving device is used for driving the rotating device to rotate.

Through adopting above-mentioned technical scheme, the semicircular frame in upper end of main frame has constituted the frame of button head window with the rectangular frame of lower extreme, and the casement can open and shut for rectangular frame, when needs windowing, can open the casement. When mosquitoes and insects are prevented from entering a house, the driving device can be opened, the driving device enables the rotating device to rotate, the gauze outer frame connected to the rotating device is driven to move relative to the rotating device when the rotating device rotates, the gauze is exposed between the rectangular frames, mosquitoes and insects are prevented when the rotating device does not need to be prevented, and clear visual fields need to be obtained, the driving device can be used for driving the rotating device, the rotating device is enabled to drive the gauze outer frame to move, and the gap (visible area) of the gauze device is exposed between the rectangular frames. Under the condition that the gauze device is not disassembled, clear vision can be provided selectively, and convenience is realized.

The utility model discloses further set up to: the soft material is cloth.

Through adopting above-mentioned technical scheme, cloth can be fine curls, can not be ageing like rubber moreover, makes things convenient for the motion of gauze frame more.

The utility model discloses further set up to: the rotating device comprises a driving roller, a driven roller and a transmission piece; the driving roller and the driven roller are arranged at two ends of the rectangular frame and can rotate relative to the rectangular frame; the first side edge of the gauze outer frame is used for winding the driving roller, and the third side edge of the gauze outer frame is used for winding the driven roller; the driving device is used for driving the driving roller to rotate; one end of the transmission piece is connected with the driving roller, and the other end of the transmission piece is connected with the driven roller, so that when the driving roller rotates, the driven roller rotates together.

Through adopting above-mentioned technical scheme, drive arrangement drive initiative roller rotates, and initiative roller drives the driving medium, and the driving medium drives driven roller and rotates. In the process, the gauze device realizes the conversion between the gauze and the visual area along with the rotation of the driving roller and the driven roller. The visible area without the gauze can be formed on the round-head window without disassembling the gauze device, and the convenience is improved.

The utility model discloses further set up to: the transmission member comprises a toothed belt; a first gear is arranged at one end of the driving roller, which is far away from the driving device, and the first gear and the axis of the driving roller are on the same straight line; a second gear is arranged at one end of the driven roller and is on the same straight line with the axis of the driven roller; the toothed belt is used for being meshed with the first gear and the second gear simultaneously so as to drive the driven roller to rotate when the driving roller rotates, and the toothed belt is arranged in the rectangular frame and is arranged on the top edge of the rectangular frame between the driving roller and the driven device.

Through adopting above-mentioned technical scheme, because the cingulum is soft, can mesh with first gear, second gear simultaneously moreover, so when the action wheel that is connected with first gear rotates, drive the cingulum, the cingulum drives the second gear rotation of meshing, and the second gear drives driven roller and rotates. In addition, the toothed belt can save space and is more reasonable compared with the toothed belt.

The utility model discloses further set up to: the driving device comprises a motor, and the output end of the motor is connected with one end of the driving roller.

Through adopting above-mentioned technical scheme, the motor is connected with the initiative roller, and when the motor during operation, can drive the initiative roller and rotate, and then drive the motion of whole gauze device. More convenient

The utility model discloses further set up to: a third gear and a fourth gear are arranged at one end of the driven roller, which is far away from the second gear; the axis of the third gear is in a straight line with the axis of the driven roller, and the third gear is fixedly arranged on the driven roller; the fourth gear is meshed with the third gear, both of which are bevel gears, and the axes of the bevel gears are vertical; the fourth gear is fixedly provided with a rotating shaft, and the rotating shaft extends out of the rectangular frame.

Through adopting above-mentioned technical scheme, through the right angle bevel gear meshing cooperation of third gear and fourth gear, the axis of rotation that rotates the fourth gear just can make driven roller rotate, and the back drives the initiative roller and rotates under the transmission of cingulum. This is the case when the motor is damaged and is not working or when the screen device is moved by manually rotating the rotary shaft due to a power failure or the like. More convenient, reduce the damage of motor and to the influence that whole button head window produced.

The utility model discloses further set up to: the rotating shaft extends out of the rectangular frame and is detachably provided with a hand wheel.

Through adopting above-mentioned technical scheme, the hand wheel can make more convenient when rotating the axis of rotation, can dismantle the setting moreover and can satisfy and change the hand wheel, more convenient when maintenance or change the hand wheel.

The utility model discloses further set up to: the hand wheel is provided with a handle, the handle is arranged on the outer wall of the rectangular frame, the handle is provided with a handle cover, and the handle cover is arranged on the handle cover; when the cover is opened with respect to the housing box, the handwheel is exposed to the outside.

Through adopting above-mentioned technical scheme, hold the box and can protect the hand wheel, prevent that the hand wheel from being damaged, can prevent moreover that child from moving at will, leading to damaging. The hand wheel can be used by opening the cover, which is more convenient.

To sum up, the utility model discloses a beneficial technological effect does:

1. the screen and the visible area can be switched at will without disassembling the screen device.

2. When the motor can not work, the gauze frame can move by rotating the hand wheel, and the practicability is stronger.

The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings.

Drawings

Fig. 1 is a schematic view showing the overall structure of a round head window of example 1 (a visible region is exposed).

Fig. 2 is a schematic view showing the overall structure of a round head window of example 1 (screen exposed state).

Fig. 3 is a schematic structural diagram of a rotating device, a driving device and a hand wheel of the round head window shown in fig. 1.

Fig. 4 is a schematic view showing the construction of a round head window screen unit shown in fig. 1.

Fig. 5 is a schematic view showing the overall structure of a round head window according to example 2.

Fig. 6 is a rear view of fig. 5.

In the figure, 1, a semicircular frame; 2. a rectangular frame; 3. a window sash; 4. a gauze frame; 401. a first side edge; 402. a second side edge; 403. a third side; 404. a fourth side; 5. a screen; 6. a visible area; 7. an active roller; 8. a driven roller; 9. a toothed belt; 10. a first gear; 11. a second gear; 12. a third gear; 13. a fourth gear; 1301. a rotating shaft; 14. a hand wheel; 15. a motor; 16. the cartridge is contained.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings. As shown in fig. 1 and 2, an embodiment of the present invention provides a round head window, which includes a main frame, a screen 5, an outer frame 4, a screen 5, a rotating device, a driving device, and a window sash 3; the upper end of the main frame is a semicircular frame 1, and the lower end of the main frame is a rectangular frame 2; the semicircular frame 1 is used for accommodating glass, and the rectangular frame 2 is used for accommodating a window sash 3; the main frame is made of aluminum alloy, wherein the diameter of the semicircular frame 1 can be the same as the length of the rectangular frame 2. The glass is clamped in the semicircular frame 1, and glass glue can be coated when the glass is installed for preventing air leakage and rain leakage. For aesthetic reasons, the remaining aluminum alloy strips may be welded to the semicircular frame 1 to form a pattern. The window sash 3 is hinged with the outer wall of the rectangular frame 2 and can be opened and closed relative to the rectangular frame 2; the window sash 3 rotates along a hinge axis to open and close with respect to the rectangular frame 2. In order to increase the sealing performance of the window sash 3, sealing strips can be arranged around the window sash 3. Preferably, the number of the window sashes 3 is two, and the two window sashes are respectively hinged on two outer walls of the rectangular frame 2, which are deviated from each other, and are arranged on the left side and the right side of the rectangular frame 2 in the figure.

As shown in fig. 4, the gauze 5 device comprises a gauze 5 outer frame 4 and a gauze 5, wherein the gauze 5 outer frame 4 is made of soft material; preferably, it may be made of cloth. The gauze 5 outer frame 4 is surrounded by four end-to-end connected side edges, the four side edges are a first side edge 401, a second side edge 402, a third side edge 403 and a fourth side edge 404 respectively, wherein the first side edge 401 and the third side edge 403 have the same length, the second side edge 402 and the fourth side edge 404 have the same length, and the first side edge 401 is shorter than the fourth side edge 404; gauze 5 sets up in gauze 5 frame 4, and gauze 5 is netted for the iron wire is made, and for preventing gauze 5's iron wire rust, the iron wire outside can have the plastic layer, and this kind of gauze 5 is common gauze 5 on the market. The outer edges of the gauze 5 are connected to the first side 401, the second side 402 and the fourth side 404, respectively, and may be sewn to the outer frame 4 of the cloth gauze 5. The gauze 5 and the third side 403 have a gap, and the length of the gap is consistent with that of the rectangular frame 2; the void-forming viewable area 6; the rectangular frame 2 may be hollowed with two parallel grooves for receiving the second side 402 and the fourth side 404, and the second side 402 and the fourth side 404 may move relative to the grooves. The rotating device is arranged in the rectangular frame 2, and can rotate relative to the rectangular frame 2; the gauze 5 device is connected with the rotating device through a first side edge 401 and a third side edge 403 of the outer frame 4 of the gauze 5; so that when the rotating device rotates, the outer frame 4 of the gauze 5 moves relative to the rotating device; the driving device is used for driving the rotating device to rotate. The semicircular frame 1 at the upper end of the main frame and the rectangular frame 2 at the lower end of the main frame form a frame of the round-head window, the window sash 3 can be opened and closed relative to the rectangular frame 2, and when the window needs to be opened, the window sash 3 can be opened. When mosquitoes and insects need to be prevented from entering a house, the driving device can be opened, the driving device enables the rotating device to rotate, the outer frame 4 of the gauze 5 on the rotating device is driven to move relative to the rotating device when the rotating device rotates, as shown in the state of figure 2, the gauze 5 is exposed between the rectangular frames 2, when mosquitoes and insects do not need to be prevented and a clear visual field needs to be obtained, the driving device can be enabled to drive the rotating device, the rotating device enables the outer frame 4 of the gauze 5 to be driven to move, as shown in figure 1, and the gap (a visual area 6) of the gauze 5 device is exposed between the rectangular frames 2. Under the condition that the gauze 5 device is not disassembled, clear vision can be provided optionally, and convenience is realized.

Further, the rotating device can comprise a driving roller 7, a driven roller 8 and a transmission piece; the driving roller 7 and the driven roller 8 are arranged at two ends of the rectangular frame 2 and can rotate relative to the rectangular frame 2; the first side edge 401 of the outer frame 4 of the gauze 5 is used for winding on the driving roller 7, and the third side edge 403 of the outer frame 4 of the gauze 5 is used for winding on the driven roller 8; the first side 401 and the third side 403 of the outer frame 4 of the screen 5 can be glued to the corresponding driving roller 7 or driven roller 8. The driving device is used for driving the driving roller 7 to rotate; one end of the transmission member is connected with the driving roller 7, and the other end of the transmission member is connected with the driven roller 8, so that when the driving roller 7 rotates, the driven roller 8 rotates together. The driving device drives the driving roller 7 to rotate, the driving roller 7 drives the transmission piece, and the transmission piece drives the driven roller 8 to rotate. In the process, the gauze 5 device realizes the conversion between the gauze 5 and the visual area 6, namely the conversion between the figures 2 and 1, along with the rotation of the driving roller 7 and the driven roller 8. The round-head window can be provided with the visible area 6 without the gauze 5 without disassembling the gauze 5 device, thereby being more convenient.

In particular, as shown in fig. 3, the transmission member may comprise a toothed belt 9; a toothed belt 9 is arranged in the rectangular frame 2 and in the top edge of the rectangular frame 2 between the driving roller 7 and the driven device. Preferably, the toothed belt 9 is arranged in the upper rim of the rectangular frame 2 as shown in fig. 1. A first gear 10 is arranged at one end of the driving roller 7 far away from the driving device, and the first gear 10 and the axis of the driving roller 7 are on the same straight line; preferably, the first gear wheel 10 is welded to the drive roller 7. One end of the driven roller 8 is provided with a second gear 11, and the second gear 11 and the axis of the driven roller 8 are on the same straight line; preferably, the second gear 11 is provided on the driven roller cylinder 8. The toothed belt 9 is annular and is sleeved on the first gear 10 and the second gear 11, and meshes with both. The toothed belt 9 is used for meshing with first gear 10 and second gear 11 simultaneously to drive driven roller 8 and rotate when making initiative roller 7 rotate, because toothed belt 9 annular can mesh with first gear 10, second gear 11 simultaneously moreover, so when the action wheel that is connected with first gear 10 rotates, drive toothed belt 9, and toothed belt 9 drives the second gear 11 rotation of meshing, and second gear 11 drives driven roller 8 and rotates. In addition, the toothed belt 9 can save space relative to the toothed belt 9, and is more reasonable.

In addition, the driving device can comprise a motor 15, and the output end of the motor 15 is connected with one end of the driving roller 7 in a clamping manner. When the motor 15 works, the driving roller 7 can be driven to rotate, and the whole gauze 5 device is driven to move. More convenient

In order to prevent the driving roller 7 and the driven roller 8 from being incapable of rotating due to the inoperability of the motor 15, as shown in fig. 3, a third gear 12 and a fourth gear 13 may be disposed at one end of the driven roller 8 far from the second gear 11; the axis of the third gear 12 is in a straight line with the axis of the driven roller 8, and the third gear 12 is fixedly arranged on the driven roller 8; the preferred means of attachment is welding. The fourth gear 13 is meshed with the third gear 12, both of which are bevel gears, and the axes of the bevel gears are vertical; the two form right angle bevel gear transmission. The fourth gear 13 is fixedly provided with a rotating shaft 1301, which may be preferably integrally formed. The rotation shaft 1301 extends out of the rectangular frame 2. The rotation shaft 1301 extending out of the rectangular frame 2 can be manually rotated. Through the meshing fit of the right angle bevel gears of the third gear 12 and the fourth gear 13, the driven roller 8 can be rotated by rotating the rotating shaft 1301 of the fourth gear 13, and then the driving roller 7 is driven to rotate under the transmission of the toothed belt 9. In this case, the motor 15 is damaged and cannot operate, or the rotation shaft 1301 is manually rotated to move the screen 5 device due to a power failure or the like. More convenient, reduce the influence that damage of motor 15 produced whole button head window.

To facilitate rotation of the rotation shaft 1301, as shown in fig. 3, the rotation shaft 1301 is detachably provided with a hand wheel 14 extending out of the rectangular frame 2. The preferred detachable mode can be a snap fit, and the center of the handwheel 14 is provided with a groove, and the groove can be snapped fit with one end of the rotating shaft 1301, so that the two can be connected. This connection is more convenient when servicing or replacing the hand wheel 14.

In order to protect the hand wheel 14, the hand wheel can further comprise an accommodating box 16, the accommodating box 16 is arranged on the outer wall of the rectangular frame 2, preferably, the accommodating box 16 can be clamped on the outer wall of the lower end of the rectangular frame 2, the accommodating box 16 is used for covering the hand wheel 14, preferably, the accommodating box 16 is provided with a bulge, the rectangular frame 2 is provided with a groove, the bulge is clamped with the groove, so that the accommodating box 16 is connected on the outer wall of the rectangular frame 2, the accommodating box 16 is provided with a cover, and the cover can be opened and closed relative to the accommodating box 16; the lid is hinged to the receptacle 16 and can be rotated relative to the hinge to effect opening or closing. When the cover is opened with respect to the housing box 16, the handwheel 14 is exposed to the outside. The accommodating box 16 can protect the hand wheel 14, prevent the hand wheel 14 from being damaged, and prevent children from randomly moving to cause damage. The hand wheel 14 can be used to open the cover, which is more convenient.

It should be noted here that, if the window sash 3 is opened, the window sash 3 faces indoors, and at this time, the screen 5 layer or the visible area 6 may be located in the space surrounded by the rectangular frame 2, and if the window sash 3 is opened, the window sash 3 faces outdoors, and each time the window is opened or closed, the visible area 6 needs to be located in the space surrounded by the rectangular frame 2, and then the window is opened or closed, and then the position of the screen 5 is adjusted.

In addition, as shown in fig. 5, the window sash 3 may have 4 sashes as in embodiment 2, in this case, the diameter of the semicircular frame 1 is the same as the length of the rectangular frame 2, which is slightly different from that in embodiment 1, and the gauze 5 device, the driving device and the rotating device are provided with two sets in one-to-one correspondence, each set corresponding to one rectangular frame 2. Namely, two sashes 3 are hinged below each rectangular frame 2, a motor 15, a driving roller 7 with a first gear 10, a driven roller 8 with a second gear 11 and a third gear 12, a fourth gear 13 with a rotating shaft 1301 meshed with the third gear 12, a rack meshed with the first gear 10 and the second gear 11, a hand wheel 14 and a containing box 16 with a cover are arranged in one rectangular frame 2. In which the assembly relationship of all the parts is the same as in embodiment 1.

The working process and the working principle of the round-head window of the utility model are introduced as follows: the motor 15 is started, the motor 15 drives the driving roller 7 to rotate, the first gear 10 connected with the driving roller 7 rotates to drive the toothed belt 9 meshed with the driving roller to rotate, the second gear 11 is driven to rotate when the toothed belt 9 rotates, the second gear 11 is connected with the driven roller 8 to rotate together, and in the process, the position of the gauze 5 can be adjusted to meet different requirements. In addition, when the motor 15 cannot work, the hand wheel 14 can be rotated, the hand wheel 14 drives the fourth gear 13 to rotate, the fourth gear 13 drives the driven roller 8 connected with the third gear 12 to rotate, then the rack is driven to rotate, and the rack drives the driving roller 7 connected with the first gear 10 to rotate, so that the position of the gauze 5 can be adjusted.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. A round head window, its characterized in that: comprises a main frame, a gauze (5) outer frame (4), a gauze (5), a rotating device, a driving device and a window sash (3);

the upper end of the main frame is a semicircular frame (1), and the lower end of the main frame is a rectangular frame (2); the semicircular frame (1) is used for accommodating glass, and the rectangular frame (2) is used for accommodating a window sash (3);

the window sash (3) is hinged with the outer wall of the rectangular frame (2) and can be opened and closed relative to the rectangular frame (2);

the outer frame (4) of the gauze (5) is made of soft material;

the gauze (5) outer frame (4) is formed by four side edges which are connected end to end, the four side edges are a first side edge (401), a second side edge (402), a third side edge (403) and a fourth side edge (404), wherein the first side edge (401) and the third side edge (403) have the same length, the second side edge (402) and the fourth side edge (404) have the same length, and the first side edge (401) is shorter than the fourth side edge (404); the gauze (5) is arranged in the gauze (5) outer frame (4), the outer edge of the gauze (5) is respectively connected with the first side edge (401), the second side edge (402) and the fourth side edge (404), gaps are formed between the gauze (5) and the third side edge (403), and the length of the gaps is consistent with that of the rectangular frame (2); a void-forming viewable area (6);

the rotating device is arranged in the rectangular frame (2), and can rotate relative to the rectangular frame (2);

the gauze (5) device is connected with the rotating device through a first side edge (401) and a third side edge (403) of the outer frame (4) of the gauze (5); when the rotating device rotates, the outer frame (4) of the gauze (5) moves relative to the rotating device;

the driving device is used for driving the rotating device to rotate.

2. A round head window according to claim 1, wherein: the soft material is cloth.

3. A round head window according to claim 1, wherein: the rotating device comprises a driving roller (7), a driven roller (8) and a transmission part; the driving roller (7) and the driven roller (8) are arranged at two ends of the rectangular frame (2) and can rotate relative to the rectangular frame (2);

the first side edge (401) of the gauze (5) outer frame (4) is used for winding on the driving roller (7), and the third side edge (403) of the gauze (5) outer frame (4) is used for winding on the driven roller (8);

the driving device is used for driving the driving roller (7) to rotate;

one end of the transmission piece is connected with the driving roller (7), and the other end of the transmission piece is connected with the driven roller (8), so that when the driving roller (7) rotates, the driven roller (8) rotates together.

4. A round head window according to claim 3, wherein: the transmission member comprises a toothed belt (9);

a first gear (10) is arranged at one end of the driving roller (7) far away from the driving device, and the first gear (10) and the axis of the driving roller (7) are on the same straight line;

one end of the driven roller (8) is provided with a second gear (11), and the second gear (11) and the axis of the driven roller (8) are on the same straight line;

the toothed belt (9) is used for being meshed with the first gear (10) and the second gear (11) simultaneously so as to drive the driven roller (8) to rotate when the driving roller (7) rotates, and the toothed belt (9) is arranged in the rectangular frame (2) and arranged in the top edge of the rectangular frame (2) between the driving roller (7) and the driven device.

5. A round head window according to claim 3, wherein: the driving device comprises a motor (15), and the output end of the motor (15) is connected with one end of the driving roller (7).

6. A round head window according to claim 4, wherein: a third gear (12) and a fourth gear (13) are arranged at one end of the driven roller (8) far away from the second gear (11);

the axis of the third gear (12) and the axis of the driven roller (8) are on the same straight line, and the third gear (12) is fixedly arranged on the driven roller (8);

the fourth gear (13) is meshed with the third gear (12), and both are bevel gears, and the axes of the bevel gears are vertical;

the fourth gear (13) is fixedly provided with a rotating shaft (1301), and the rotating shaft (1301) extends out of the rectangular frame (2).

7. The bullnose window of claim 6, wherein: a hand wheel (14) is detachably arranged on the rotating shaft (1301) extending out of the rectangular frame (2).

8. The bullnose window of claim 7, wherein: the hand wheel support frame further comprises an accommodating box (16), the accommodating box (16) is arranged on the outer wall of the rectangular frame (2), the accommodating box (16) is used for covering the hand wheel (14), the accommodating box (16) is provided with a cover, and the cover can be opened and closed relative to the accommodating box (16);

when the cover is opened with respect to the housing box (16), the handwheel (14) is exposed to the outside.